news - TAIZHOU HUANGYAN SOLIDCO MOULD CO.,LTD

2023-07-17

Appearance Requirements Design of Lamp Decorative Frame Mold

Among the automotive molds, the most stringent requirements are the lamp molds, so the design of the lamp injection molds has very high requirements. The main components that make up the car lights are: left and right lenses, left and right decorative frames, left and right lamp housings, left and right reflectors, etc. The car lamp decoration frame is one of the more important parts of the car lamps. Its appearance quality is strictly required, and the mold of the car lamp decoration frame needs to be electroplated. For the design of the lamp decorative frame mold, the following points should be paid attention to: 1) The injection mold of the lamp decoration frame that needs to be electroplated should try to avoid the generation of weld lines, because any weld lines of the injection molded parts that need to be electroplated will be exposed, which will seriously affect the appearance of the lamp decoration frame, so we design and pour Welding lines should be avoided during the system. If the welding line cannot be avoided, try to set it in a non-appearance area, and verify it through mold flow analysis before gating system design. 2) The surface of the car light decorative frame is generally designed with a pattern. When designing the mold of the car light decorative frame, attention should be paid to the depth of the pattern of the plastic part, otherwise it is easy to produce flow lines. 3) The molding process range of the plastic raw material we use is very narrow, and bright spots are easy to appear on the surface of the decorative frame of the car light, and it is difficult to control. When designing the pouring system of the lamp decoration frame mold, the runner should be as

2023-07-10

A big secret to reduce injection molding cycle --- reduce cooling time

In the injection molding process, the cooling time accounts for 80% of the injection molding cycle, and the injection molding cycle is an important factor affecting the injection molding cost. Reducing the cooling time of injection molding is an important means to reduce the cost of injection molding. Factors that affect cooling time in the injection molding process are: 1) Selected injection mold steel: If you want to improve cooling efficiency, you need to give priority to mold steel with better thermal conductivity when selecting materials. 2) Layout of mold water channels: When designing injection mold water channels, it is necessary to fully evaluate the hot spots of product structure design. In order to achieve this goal, it is necessary to consider designing a set of circulating water channels separately, and use the beryllium copper insert just mentioned or add a heat conduction needle to install a cooling tool for the thin-walled insert with a heat pipe. The waterway of the mold should adopt straight-through waterway as far as possible, reduce the waterway design with too many cooling wells and corners, and avoid too many dead water areas. In the mold design stage, the layout of the cooling water channel is reasonably arranged to basically guarantee the cooling effect. 3) Mold temperature: It is determined by measuring the actual temperature of the water inlet and outlet points on the surface of the mold cavity. If the temperature difference between different areas and the temperature difference from the set value can be controlled within ±5°C, it means that the basic cooling effect is still acceptable. 4) Routine maintenance of injection molds: If there is oil or dirt on the surface of the mold, the cooling efficiency will generally be reduced. It is necessary to clean the surface of the cavity regularly and use a cleaning machine to clean the water channel

2023-07-05

The technical requirements of the mold assembly drawing

A. Draw the general assembly structure diagram The ratio of 1:1 should be adopted as much as possible for drawing the general assembly drawing, starting from the cavity, and drawing the main view and other views at the same time. The mold assembly drawing should include the following: ①Moulding part structure ②The structure of pouring system and exhaust system. ③Parting surface and parting method. ④Shape structure and all connectors, positioning and position of guides. ⑤Mark the height dimension of the cavity (not mandatory, as needed) and the overall size of the mold. ⑥ Auxiliary tools (picking and unloading tools, calibration tools, etc.). ⑦Compile all the part numbers in order, and fill in the schedule. ⑧ Mark the technical requirements and instructions for use. B. The technical requirements of the mold assembly drawing: ① Performance requirements for certain systems of the mold. For example, the assembly requirements for the ejection system and the core-pulling structure of the slider. ② Requirements for mold assembly process. For example, after the mold is assembled, the lamination gap of the joint surface of the parting surface should not be greater than 0.05mm. The parallelism requirements on the upper and lower sides of the mold should be specified, and the size determined by the assembly and the requirements for this size should be indicated. ③Mould use, assembly and disassembly methods. ④ Requirements for anti-oxidation treatment, mold number, lettering, marking, oil seal, storage, etc. ⑤ Requirements for mold testing and inspection. C. Draw all parts diagrams The order of dismantling and drawing part drawings from the mold assembly drawing s

2023-07-03

What is the purpose of making inserts in injection mold processing?

Injection mold inserts are also called inserts, and some people call them inserts, which have different names. It refers to the mold parts used to be embedded in the core of the injection mold, which requires very high precision. So why bother to make inserts when processing injection molds? There are mainly the following purposes: 1. Save injection mold manufacturing materials As we all know, the fixed material of the injection mold is a relatively regular block steel with a fixed shape, but the material of the front and rear molds is determined by the height of z, whether it is the front mold or the rear mold, if a certain place is higher than other places, it can be Create inserts to reduce the height of the mold. 2. Easy to change the mold Where the injection mold is often modified, it can be dismantled and made into inserts. When changing the mold in the future, only the inserts need to be replaced, and even a few more inserts can be replaced when the mold is opened, which is convenient for mold modification. 3. Conducive to exhausting of injection mold Venting of injection molding molds is very important. If the exhaust is not good, trapped air will appear in the mold cavity, especially in the relatively deep bone position. During injection molding, the product is prone to bubbles or shrinkage, lack of glue, whitening or black spots and other undesirable phenomena. Therefore, inserts can be added where the mold needs to be vented, and the fitting gap of the inserts can be used for venting. 4. Convenient injection mold processing There are some deep bones in the injection mold, and the tool is difficult to process. Although EDM can be used, the EDM processing speed is slow and the processing efficiency is not high. Therefore, inserts are generally selected to reduce the proc

2023-07-02

Factors affecting the structure of the mold and the individual systems of the mold

① Cavity layout. The number of cavities and their arrangement are determined according to the geometric structure characteristics of plastic parts, dimensional accuracy requirements, batch size, difficulty of mold manufacturing, and mold cost. For the injection mold, the precision of the plastic parts is grade 3 and grade 3a, the weight is 5 grams, the hardened pouring system is adopted, and the number of cavities is 4-6; the plastic parts are of general precision (4-5 grade), and the molding The material is partially crystalline material, the number of cavities can be 16-20; the weight of plastic parts is 12-16 grams, the number of cavities is 8-12; the weight of plastic parts is 50-100 grams, the number of cavities is 4-8 pieces. For amorphous plastic parts, the recommended number of cavities is 24-48, 16-32 and 6-10. When the weight of plastic parts continues to increase, multi-cavity molds are rarely used. For plastic parts with 7-9 precision grades, the maximum number of cavities increases to 50% compared with the pointed 4-5 grades of precision plastics. ② Determine the parting surface. The position of the parting surface should be conducive to mold processing, exhaust, demoulding and molding operations, and the surface quality of plastic parts. ③Determine the gating system (the shape, position and size of the main runner, sub-runner and gate) and the exhaust system (the method of exhaust, the position and size of the exhaust groove). ④ Select the ejection method (ejector pin, pipe ejector, push plate, combined ejector), and determine the undercut treatment method and core pulling method. ⑤Determine the cooling and heating methods, the shape and position of the heating and cooling grooves, and the installation parts of the heating elements. ⑥ According to the mold material, strength calculati

2023-07-01

Plastic mold design process

1. Accept the task letter The task statement for forming plastic parts is usually proposed by the part designer, and its contents are as follows: ⑴The drawings of formal parts that have been approved and signed, and indicate the grade and transparency of the plastic used. ⑵Instructions or technical requirements for plastic parts. ⑶ production output. ⑷ samples of plastic parts. Usually the mold design task book is put forward by the plastic parts craftsman according to the task book for forming plastic parts, and the mold designer designs the mold based on the forming plastic part task book and the mold design task book. 2. Collect, analyze and digest raw data Collect and sort out information about part design, molding process, molding equipment, machining and special processing for use in mold design. (1) Digest the drawings of plastic parts, understand the use of parts, and analyze the technical requirements of plastic parts such as manufacturability and dimensional accuracy. For example, what are the requirements for plastic parts in terms of appearance shape, color transparency, and performance; whether the geometric structure, slope, and inserts of plastic parts are reasonable; Assembly, electroplating, bonding, drilling and other post-processing. Select the size with the highest dimensional accuracy of the plastic part for analysis to see if the estimated molding tolerance is lower than the tolerance of the plastic part, and whether a satisfactory plastic part can be formed. In addition, it is necessary to understand the plasticization and molding process parameters of plastics. ⑵ Digest the process data, and analyze whether the molding method, equipment model, material specification, mold structure type and other requirements proposed in the process task book are appropri

2023-06-15

Glass Fiber Reinforced Material Injection Molding

"Can your family do injection molding of glass fiber reinforced materials?" For example: PA+30%GF, PA+60%GF. So what are the headaches in the injection molding of glass reinforced materials? The most important possibility is that there will always be floating fibers in the injection molding products of glass fiber reinforced materials. How to solve it? Take nylon plus glass fiber as an example. 1) The compatibility between glass fiber and nylon is poor. During the modification process, nylon has low fluidity and does not fully infiltrate glass fiber. 2) During the injection molding process, due to the friction and shear force of the screw, nozzle, runner and gate during the flow of the plastic melt, it will cause local viscosity differences, and at the same time damage the contact surface of the glass fiber surface , the smaller the viscosity of the contact surface, the more serious the damage of the contact surface, and the smaller the bonding force between the glass fiber and the resin. When the bonding force of the contact surface is small enough, the glass fiber will break away from the shackles of the resin matrix and gradually The surface is accumulated and exposed. 3) It is related to the difference in specific gravity between the glass fiber and the base material. During the melting process, due to the different fluidity and mass density between the glass fiber and the resin, the two tend to separate, the glass fiber floats to the surface, and the resin Sinks to the inside, thus forming glass fiber exposure. 4) Fountain effect. When nylon melt is injected into the mold, a "fountain effect" will be produced, that is, the glass fiber will flow from the inside to the outside and contact the surface of the cavity. Due to the low temperature of the injection mold surface, the glass fiber will be instantly lightweight Condensation Congeals rapidly, and if it cannot be completely wrapped

2023-06-12

The mold meets the requirements of working conditions

1. Wear resistance When the blank is plastically denatured in the mold cavity, it flows and slides along the surface of the cavity, causing severe friction between the surface of the cavity and the blank, resulting in the failure of the mold due to wear. Therefore, the wear resistance of the material is one of the most basic and important properties of the mold. Hardness is the main factor affecting wear resistance. In general, the higher the hardness of the mold parts, the smaller the amount of wear and the better the wear resistance. In addition, wear resistance is also related to the type, quantity, shape, size and distribution of carbides in the material. 2. Strong toughness Most of the working conditions of the mold are very harsh, and some often bear large impact loads, resulting in brittle fracture. In order to prevent sudden brittle fracture of mold parts during work, the mold must have high strength and toughness. The toughness of the mold mainly depends on the carbon content, grain size and organizational state of the material. 3. Fatigue fracture performance During the working process of the mold, under the long-term action of cyclic stress, it often leads to fatigue fracture. Its forms include small energy multiple impact fatigue fracture, tensile fatigue fracture, contact fatigue fracture and bending fatigue fracture. The fatigue fracture performance of the mold mainly depends on its strength, toughness, hardness, and the content of inclusions in the material. 4. High temperature performance When the working temperature of the mold is high, the hardness and strength will decrease, resulting in early wear or plastic deformation of the mold and failure. Therefore, the mold material should have high stability against tempering to ensure that the mold has high hardness and strength at working temperatu

2023-06-05

How to maintain product precision in precision injection molding

1. What is precision injection molding Precision injection molding generally refers to an injection molding method in which the dimension repeatability of processed and formed injection products is high, and it is difficult to meet the requirements with general-purpose injection molding machines and general-purpose injection molding techniques. The injection mold is an important condition to determine whether the injection molded parts meet the precision tolerance required by the design, and the precision injection molding machine is the key equipment to ensure that the product can always meet the required dimensional tolerance and ensure a very high yield. 2. Characteristics of precision injection molding (1) The dimensional accuracy of injection molded parts is high and the tolerance is small; (2) Injection molded parts have high repeatability and require high dimensional stability; (3) The materials used in the manufacture of injection molds should be good, the rigidity of the materials should be sufficient, and the dimensional accuracy and smoothness of the cavity and the positioning accuracy between the templates should be high; (4) Replace conventional injection machines with precision injection machines; (5) Adopt precision injection molding process; (6) Select materials suitable for precision injection molding. 3. The main factors affecting the precision of injection molded parts; (1) Precision of injection mold; (2) Shrinkage during injection molding (3) The ambient temperature, humidity and fluctuation range of injection molded parts.

2023-06-01

Injection Mould Maintenance Points

Because injection molds are special, precise, and easily damaged, it is particularly important to protect them safely. The general summary is as follows: Anti-corrosion: prevent the injection mold from rusting due to leakage, condensation, rain, fingerprints and other reasons. Anti-collision: Prevent the mold from being damaged due to the injection mold being broken and not rebounding in place. Burrs: Prevent mold burrs caused by cloth wiping/material punching/hand wiping/nozzle knife collision. Missing parts: prevent the injection mold from being damaged due to missing parts such as tie rods and gaskets during use. Anti-crushing: prevent injection molds from being locked due to product residues and cause mold crushing. Underpressure: prevent damage to the injection mold due to too low pressure. Among them, the proportion of injection mold damage caused by broken thimble, unreturned thimble, residual products in the mold, and lack of auxiliary parts is relatively high, and because of the frequent occurrence, more than 85% of the damage to the injection mold is caused by this, resulting in injection molding Mold maintenance costs are generally relatively high, so how to avoid such situations is directly related to the interests of the injection molding industry.

2023-05-15

Five steps in plastic mold manufacturing

Plastic mold manufacturing can generally be divided into 5 major steps. 1) Analysis of plastic parts In the mold design, the plastic mold engineer should fully analyze and study whether the plastic parts meet the mold opening requirements, including discussing the geometric shape, dimensional accuracy and appearance requirements of the product, and try to avoid unnecessary complexity in the plastic mold manufacturing. 2) Plastic mold structure design A good set of molds not only requires good processing equipment and skilled mold manufacturing workers, but also requires good plastic mold structure design, especially for complex structural molds, the quality of mold design accounts for more than 80% of mold quality. A good mold design engineer needs to reduce processing costs, reduce the difficulty and time of plastic mold manufacturing on the premise of meeting customer requirements. 3) Determine the plastic mold material and standard parts In addition to considering the accuracy and quality of the product, the selection of plastic mold materials should also be made in combination with the processing equipment and actual heat treatment capabilities of the mold factory. In addition, in order to shorten the plastic mold manufacturing cycle, you can choose standard parts processing as much as possible. 4) Processing and assembly of plastic mold parts Plastic mold precision In addition to reasonable mold structure and tolerance range, mold parts processing and mold assembly are crucial. Therefore, the choice of mold processing accuracy and processing methods has a very important position in plastic mold manufacturing. 5) Tryout Mold trial is an important step to check whether the plastic mold manufacturing is qualified and to select the molding process. It can verify whether the demoulding is smooth or not, how the coo

2023-05-08

A big secret to reduce injection molding cycle - reduce cooling time

In the injection molding process, the cooling time accounts for 80% of the injection molding cycle, and the injection molding cycle is an important factor affecting the injection molding cost. Reducing the cooling time of injection molding is an important means to reduce the cost of injection molding. Factors that affect cooling time in the injection molding process are: 1) Selected injection mold steel: If you want to improve cooling efficiency, you need to give priority to mold steel with better thermal conductivity when selecting materials. 2) The layout of the mold waterway: when designing the waterway of the injection mold, it is necessary to fully evaluate the hot spots of the product structure design. In order to achieve this goal, it is necessary to consider designing a separate set of circulating water channels, and use the beryllium copper insert just mentioned or add a heat conduction pin to install a cooling tool for the thin-walled insert with a heat pipe. The waterway of the mold should adopt straight-through waterway as far as possible, reduce the waterway design with too many cooling wells and corners, and avoid too many dead water areas. In the mold design stage, the layout of the cooling water channel is reasonably arranged to basically guarantee the cooling effect. 3) Mold temperature: It is determined by measuring the actual temperature of the water inlet and outlet points on the surface of the mold cavity. If the temperature difference between different areas and the temperature difference from the set value can be controlled within ±5°C, it means that the basic cooling effect is still acceptable. 4) Routine maintenance of injection molds: If there is oil or dirt on the surface of the mold, the cooling efficiency will generally be reduced. It is necessary to regularly clean the surface of the cavity and use a cleaning machine to clean the mold wa

2023-05-04

Mold accessories

Punch pin, punch, guide post, guide sleeve, ejector rod, thimble, cylinder, steel ball sleeve, independent guide post, slider, date stamp, inclined top slider, sprue sleeve (rubber sleeve), positioning block, Guide fixing block, guide post assistant (positioning post), guide post assembly, etc. Composition of structural parts Blow molds, casting molds and thermoforming molds are relatively simple in structure. Compression molds, injection molds and transfer molds have relatively complex structures, and there are many parts that make up such molds. The basic parts are: ① Molded parts, including dies, punches, and various molding cores, are parts of the inner and outer surfaces or upper and lower end faces, side holes, undercuts, and threads of shaped products. ②Supporting and fixing parts, including mold base plate, fixing plate, support plate, pads, etc., are used to fix the mold or support pressure. ③Guide parts, including guide posts and guide sleeves, are used to determine the relative position of the movement of the mold or the ejection mechanism. ④Core-pulling parts, including oblique pins, sliders, etc., are used to pull out the movable core when the mold is opened, so that the product can be demoulded. ⑤Push out parts, including push rod, push tube, push block, push plate, push ring, push rod fixing plate, push plate, etc., to demould the product. Injection molds mostly promote the use of standard mold bases. This mold base is composed of a complete set of basic parts that have been standardized and serialized in structure, form and size. The mold cavity can be processed according to the shape of the product. The use of standard mold bases is beneficial to shorten the molding cycle. The role of common mold base parts Fixed mold seat plate (panel): fix the front mold on the injection molding machine.

2023-05-03

Plastic mold steel performance requirements

With the rapid development of the manufacturing industry, plastic molds are an indispensable tool in plastic molding processing. The proportion of the total mold output is increasing year by year. With the development and continuous production of high-performance plastics, the types of plastic products are increasing. The use is constantly expanding, and the products are developing towards precision, large-scale and complexity. Molding production is developing towards high speed, and the working conditions of molds are becoming more and more complicated. 1) Wear and corrosion of cavity surface The plastic melt flows in the mold cavity with a certain pressure, and the solidified plastic parts come out of the mold, which will cause friction on the molding surface of the mold and cause wear. The root cause of plastic mold wear failure is the friction between the mold and the material. However, the specific form and wear process of the wear are related to many factors, such as the pressure, temperature, material deformation speed and lubrication condition of the mold during the working process. When the material and heat treatment used in the plastic mold are unreasonable, the surface hardness of the cavity of the plastic mold is low and the wear resistance is poor, which is manifested as: the size of the cavity surface is out of tolerance due to wear and deformation; , the surface quality deteriorates. Especially when using solid material to enter the mold cavity, it will aggravate the wear of the cavity surface. In addition, during plastic processing, components such as chlorine and fluorine are heated and decomposed to produce corrosive gases HC1 and HF, which cause corrosion and wear on the cavity surface of the plastic mold, resulting in failure. If there is wear damage at the same time as wear, the coating or other protective layer on the surface of the cavity is damaged, wh

2023-05-03

Six suggestions for quality control of injection molding products

1) Do not easily determine the injection molding process, and do not easily change the determined process. 2) Injection molding process control must have a strong sense of quantification and traceability ① Don't ignore the details in the injection molding process. ② Use data to control and record every detail in the injection molding process. ③ Failure to control and trace the details of the injection molding process will delay the formulation of corrective and preventive measures. 3) Solve the problem patiently and carefully. When the reason and pattern cannot be found, the influencing factors of the analysis can be controlled and standardized. 4) To establish a preventive thinking, the daily process and results should be sorted out, and the changing rules and trends of injection molding processing should be found from the sorting results. These rules and displayed trends need to be constantly corrected. 5) The quality control of injection molding products must have management thinking. It is necessary to observe, pay attention to and study the performance and status of the direct manufacturer of the product, and manage and mobilize these performances and status. 6) Listen to other people`s opinions and suggestions. The thinking of injection molding product quality management often touches the forefront. Even a random sentence or a complaint may guide or imply a major rectification direction, so professional A technician should be someone who pays attention to details and is good at capturing details.

2023-05-02

Main categories of plastic molds

According to the different molding methods, the types of plastic processing molds corresponding to different process requirements can be divided, mainly including injection molding moulds, extrusion molding moulds, blister molding moulds, high-expansion polystyrene molding moulds, etc. 1. Plastic injection (plastic) mold It is mainly a molding mold most commonly used in the production of thermoplastic parts. The processing equipment corresponding to the plastic injection mold is a plastic injection molding machine. Or driven by the plunger, it enters the mold cavity through the nozzle of the injection machine and the gating system of the mold, and the plastic is cooled and hardened to form, and the product is demoulded. Its structure is usually composed of molding parts, pouring system, guide parts, ejection mechanism, temperature adjustment system, exhaust system, support parts and other parts. The manufacturing materials usually use plastic mold steel modules, and the commonly used materials are mainly carbon structural steel, carbon tool steel, alloy tool steel, high-speed steel, etc. The injection molding processing method is usually only suitable for the production of thermoplastic products. The plastic products produced by the injection molding process are very extensive, ranging from daily necessities to various complex machinery, electrical appliances, and vehicle parts. It is the most widely used processing method in the production of plastic products. 2. Plastic compression mold Including compression molding and injection molding two structural mold types. They are a type of mold mainly used to form thermosetting plastics, and the corresponding equipment is a pressure molding machine. According to the characteristics of the plastic, the compression molding method heats the mold to the molding temperature (generally 103°-108°), then puts the me

2023-04-22

Chromatic aberration of injection mold

Injection mold processing technology has become more and more popular in the plastic product production industry. After decades of development, the entire process has matured. Color difference factors of injection molding products: 1. Raw material factors: including toner replacement, plastic material brand change, and setting agent replacement. 2. Variety selection of raw materials: For example, PP material and ABS material or PC material require the same color, but there is a slight color difference due to the different development of the main varieties of materials, but a limited scope of protection is allowed. 3. Environmental factors: Injection mold manufacturers have experienced for many years, generally the rollers are not clean, and the drying hopper is dusty, which will cause mold oil pollution. 4. Equipment process reasons: temperature, pressure, and melting time in the injection molding process will also cause color difference problems, and other process factors such as material mixing in different batches and beer on different machines will also affect it. 5. Factors of the toner itself: Some toners are not subjected to temperature, and the products are easily changed by changes in the temperature environment.

2023-04-11

How Injection Molding Is Affected

Mold designers must have rich design and injection molding experience, and must consider the relationship between these factors and injection molding conditions and their apparent factors, such as injection pressure, cavity pressure and filling speed, injection melt temperature and mold temperature , mold structure and gate type and distribution, and discussed the influence of gate area, wall thickness, filler content in plastic, plastic crystallinity and orientation. The influence of the above factors also varies with plastic materials or other molding conditions such as temperature, humidity, continuous crystallization, and molding machines. Among the relevant factors affecting precision injection molding, molds are the key to obtaining precision plastic products that meet quality requirements. Mold design, whether the mold design is reasonable or not will directly affect the quality of plastic products. The size of the mold cavity is obtained by adding the required size of the plastic product to the shrinkage rate of the material used. The shrinkage rate is often a value within the recommended range of the plastic manufacturer or engineering plastics manual. It is not only related to the mold gate form, gate position and Distribution is also related to the crystal orientation (anisotropy) of engineering plastics, the shape and size of plastic products, and the distance and position from the gate. The main factors affecting plastic shrinkage include thermal shrinkage, phase change shrinkage, orientation shrinkage, compression shrinkage and elastic recovery, which are related to the molding conditions or operating conditions of precision injection molded products. Because the injection molding process is the change process of plastic from solid (powder or granule) to liquid (melt) to solid (product). From granular material to melt, and then from melt to product, through temperature field, flow field and density field, etc. Under the ac

2023-04-03

How to control the time of injection molding

In the process of injection molding, the time control system is very important, and it will affect the quality of the entire finished product of the enterprise. If you want to do a good job in injection molding processing, in addition to skilled operation, you must also have the ability to control the processing time. Because if there is no time to control some research steps, we may find that there are many problems in the produced product information. So what exactly do you need to control your time? 1. Injection time In the processing of injection molded products, injection molding can not only protect the product, but also make the product more shiny. But it is not easy to master the fuel injection timing, because it is difficult to control the fuel injection timing. Not only the fuel injection timing, but also a series of factors such as pressure, speed, and temperature must be considered. 2. Low voltage protection time During this time, the first thing to do is to set the environmental protection time to two seconds, but according to the specific situation, add a delay of a few tenths of a second, so that we can develop and play the role of low-voltage system protection. 3. Cooling time The cooling time should be determined according to the specific shape of the product, but the cooling time should be longer than the sol time so that the product can be fully formed. 4. Holding time In order to ensure that the size of the injection molded product can meet the requirements, the holding time is very important. While maintaining pressure, allow the gate to cool before inverting the solution. This time can be determined according to the gate.

2023-03-22

Causes of workpiece deformation in wire cutting

Split a piece of bamboo in the middle, and both halves of the bamboo slice will bend, the larger half will bend less, and the smaller half will bend more. This means that the material itself will have stress, and the process of splitting breaks the original stress balance of the material, and restores the balance through deformation. The same is true for the deformation of workpieces processed by wire cutting. The cutting process breaks the original stress balance state of workpieces. The deformation of wire cutting is related to the structure of the workpiece. Dies and punches with narrow and long shapes are prone to deformation, and the size of the deformation is related to the complexity of the shape, aspect ratio, etc.; workpieces with thin wall thickness are prone to deformation. If the deformation is very small, within the accuracy range required by the processing, this deformation can be almost ignored. However, if the deformation exceeds the machining accuracy requirements, there will be obvious deviations in the size, which will affect the machining shape of the workpiece. There are many reasons for the deformation, such as material problems, heat treatment problems, structural design problems, process arrangement problems, workpiece clamping and cutting path selection problems during wire cutting, etc. These various reasons will lead to the deformation of the internal stress of the material.

2023-03-22

Causes of workpiece deformation in wire cutting

Split a piece of bamboo in the middle, and both halves of the bamboo slice will bend, the larger half will bend less, and the smaller half will bend more. This means that the material itself will have stress, and the process of splitting breaks the original stress balance of the material, and restores the balance through deformation. The same is true for the deformation of workpieces processed by wire cutting. The cutting process breaks the original stress balance state of workpieces. The deformation of wire cutting is related to the structure of the workpiece. Dies and punches with narrow and long shapes are prone to deformation, and the size of the deformation is related to the complexity of the shape, aspect ratio, etc.; workpieces with thin wall thickness are prone to deformation. If the deformation is very small, within the accuracy range required by the processing, this deformation can be almost ignored. However, if the deformation exceeds the machining accuracy requirements, there will be obvious deviations in the size, which will affect the machining shape of the workpiece. There are many reasons for the deformation, such as material problems, heat treatment problems, structural design problems, process arrangement problems, workpiece clamping and cutting path selection problems during wire cutting, etc. These various reasons will lead to the deformation of the internal stress of the material.

2023-03-20

Matters needing attention during mold trial

DFM ready The engineer in charge needs to prepare DFM to check the mold structure in detail. If there is any problem, it needs to be clarified on the spot. If there is something wrong, it needs to be recorded in the mold test condition table for feedback and correction. Check the water connection method and set various conditions The project requires one-by-one water connection (following DFM, one in and one out), mold temperature setting, material tube temperature setting, and inspection of injection conditions. If there is any non-conformity, it needs to be corrected immediately. If it cannot be corrected immediately, it needs to be tested in the mold Record the condition table so that the problems can be improved during the review. Product injection 90-95% full Before the product is released, it is necessary to estimate the product measurement. Prioritize the position of the holding pressure switch according to the MOLDFLOW conditions. The product needs to be kept at 0 holding pressure, and the slow-shooting product is 90-95% stable and the screw storage material is kept at about 10% (the mold has a mold When there are multiple cavities, it is necessary to check whether the feeding of each cavity is uniform, otherwise it is necessary to retain samples to facilitate mold adjustment) and then slowly increase the pressure of 10 pressures until the product looks the best. Confirm the size and appearance When the appearance of the product is adjusted to an acceptable state, take 2 models of the product, soak in water for 2-5 minutes, measure the size, take the product size as the benchmark, and adjust the size to the limit value in the drawing without assembly requirements, and then structure Adjust the appearance and fine-tune the injection parameters, and use the best appearance and structure conditions (confirm shrinkage, burr, lack of material, joint line and other defects) to print the requi

2023-03-19

General flow of mold design

1. Analyze and digest the products and samples. 2. It should be known whether the customer has requirements for the specifications of the injection machine to determine the size range of the mold. 3. Determine the number of cavities and arrange them. 4. The parting surface is determined. 5. If there is row position and orthorhombic structure, it should be understood first. 6. Gating system design. 7. Determination of mosaic structure. 8. Ejection and reset system design. 9. Cooling and heating system design. 10. Guiding and positioning device. 11. Determine the mold base and select standard parts. 12. Selection of mold steel. 13. Complete the structural drawing, mold base drawing, and material cutting. 14. Finally, print out the drawing, check it, and submit it to the mold design team leader and supervisor.

2023-03-18

what are the mold standard parts?

Mold standard parts are an important part of the mold, is the foundation of the mold. Commonly used mold standard parts are: Die stand (cold drawing die, plastic die, die casting die, etc.), guide parts (guide post, guide sleeve, guide plate, push plate guide post, push plate guide sleeve, etc.), positioning parts (pin, conical positioning pin, wedge positioning block), push rod and push tube (circular, shaped, direct push, step form), elastic components (circular compression spring, rubber spring), Small standard parts (gate sleeve, positioning ring, hook, screw, discharge nail, limit nail, etc.), hot runner device, standard components (punch quick change device, guide component, side punching device), other standard parts.