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Tag search results for: "crate mould"
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1. Accept the task

(1) The formal drawing of the crate mould after being audited and signed and the brand and transparency of the plastic shall be indicated.

(2) Specifications or technical requirements for plastic parts.

(3) Production output.

(4) Samples of plastic parts.

Usually, the task of designing the Crate Mould(FURNITUREMOULD) is put forward by the craftsman according to the task book of forming plastic parts, and the mould designer designs the mould according to the task book of forming plastic parts and the task book of mould design.

2. Collect, analyze and digest the original data

Collect and sort out the data on the design, moulding process, moulding equipment, mechanical processing and special processing for use in the design of crate mould.

(1) digest the drawing of plastic parts, understand the purpose of the parts, and analyze the technical requirements such as manufacturability and dimensional accuracy of plastic parts. For example, what are the requirements of plastic parts in terms of appearance shape, color transparency and service performance, whether the geometric structure, inclination and insert of the plastic parts are reasonable, the allowable degree of forming defects such as weld marks and shrinkage cavities, and whether there is post-processing such as coating, electroplating, glueing, drilling, etc. Select the dimension with the highest dimensional accuracy of plastic parts for analysis to see if the estimated forming tolerance is lower than that of plastic parts and whether the plastic parts can be formed to meet the requirements. In addition, it is necessary to know the plasticizing and moulding process parameters of plastics.

(2) Digesting process data, analyzing whether the requirements of moulding method, equipment type, material specification, crate mould structure type and the like proposed in the process specification are appropriate and can be implemented.

The moulding materials shall meet the strength requirements of plastic parts and have good fluidity, uniformity, isotropy and thermal stability. According to the application of plastic parts, the moulding materials shall meet the requirements of dyeing and metal plating conditions, decoration performance, necessary elasticity and plasticity, transparency or opposite reflection performance, adhesiveness or weldability, etc.

(3) Determining a moulding method

Is it direct compression, casting or injection?

(4) Selecting moulding equipment

According to the type of moulding equipment to choose the crate mould, so we must be familiar with the performance, specifications and characteristics of various moulding equipment. For example, for injection machines, the following contents should be understood in terms of specifications: injection capacity, mould clamping pressure, injection pressure, mould installation size, ejection device and size, nozzle hole diameter and nozzle spherical radius, gate sleeve positioning ring size, mould maximum thickness and minimum thickness, mould stroke, etc. See relevant parameters for details. The overall dimensions of the mould should be preliminarily estimated to determine whether the mould can be installed and used on the selected injection machine.

(5) Specific structural scheme

The choice of an ideal crate mould structure lies in determining the necessary forming equipment and the ideal number of cavities, which can make the crate mould itself meet the requirements of technological technology and economic production of the plastic parts under absolutely reliable conditions. The technological requirements for plastic parts are to ensure the geometric shape, surface finish and dimensional accuracy of plastic parts. The economic requirements of production are to make the cost of plastic parts low, the production efficiency high, the crate mould can work continuously, the service life is long, and the labour force is saved.

If you are interested in our products, you can click Household Product Mould to learn more information.

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In the process of plastic melting and plasticizing, the Crate Mould(FURNITUREMOULD) is prone to defects. The solution is to reduce the quenching stress after heat treatment to a minimum, because the quenching stress and the mesh carbonized structure, under the action of grinding force, can easily crack the workpiece due to phase transformation of the structure. Reasonable use of cooling and lubricating fluid, play the three major roles of cooling, washing and lubrication, keep the cooling and lubricating clean, thus control the grinding heat within the allowable range, and prevent the thermal deformation of the workpiece.

Specific Operation of Processing Defects of Crate Mould:

1. Improve the cooling conditions during grinding, such as adopting oil impregnated grinding wheel or internal cooling grinding wheel and other measures. When cutting fluid is introduced into the center of grinding wheel, cutting fluid can directly enter grinding area to play an effective cooling role and prevent workpiece surface burns. Reasonable use of cooling and lubricating fluid, play the three major roles of cooling, washing and lubrication, keep the cooling and lubricating clean, thus control the grinding heat within the allowable range, and prevent the thermal deformation of the workpiece.

2. Reduce the quenching stress after heat treatment to the minimum, because under the action of grinding force, the quenching stress and reticular carbonized structure can easily cause cracks in the workpiece due to phase transformation of the structure. In order to eliminate the grinding residual stress of high precision dies, low temperature aging treatment should be carried out after grinding to improve toughness.

3. To eliminate grinding stress, the crate mould can also be immersed in salt bath at 260 ~ 315℃ for 1.5min, and then cooled in oil at 30℃, thus the hardness can be reduced by 1HRC and the residual stress can be reduced by 40% ~ 65%.

4. For precision grinding of precision dies with dimensional tolerance within 0.01mm, attention should be paid to the influence of ambient temperature and constant temperature grinding is required. From the calculation, it can be seen that when the temperature difference of 300mm long steel parts is 3℃, the material has a change of about 10.8μm (10.8=1.2×3×3, the deformation amount per 100mm is 1.2μm/℃). All finishing processes should fully consider the influence of this factor.

5. Electrolytic grinding is adopted to improve the manufacturing precision and surface quality of the crate mould. During electrolytic grinding, the grinding wheel scrapes off oxide film instead of metal, so the grinding force is small, the grinding heat is also small, no grinding burr, crack, burn and other phenomena will occur, and the general surface roughness can be better than Ra0.16μm; In addition, the abrasion of the grinding wheel is reduced. For example, when grinding hard alloy, the abrasion of the silicon carbide grinding wheel is about 400% ~ 600% of the weight of the hard alloy, while when electrolytic grinding is used, the abrasion of the grinding wheel is only 50% ~ 100% of the abrasion of the hard alloy.

If you are interested in our products, you can click Household Product Mould to learn more information.

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1. The steel used for making die parts of Crate Mould(FURNITUREMOULD) shall be wear-resistant, corrosion-resistant, with small deformation in high-temperature environment and certain toughness.

2. All parts in the crate mould shall be assembled in the mould body, and the cavity working surface of melt flow channel formed shall be smooth, level and free from material stagnation. If necessary, hard chrome layer shall be plated on the surface.

3. When the parts in the crate mould are disassembled and the sticky materials are cleaned, it is not allowed to strike the working face with a hammer, and it is not allowed to clean the residual materials stuck on the working face with a scraper, and there are no scratches and burrs on the working face.

4. Pay attention to the process temperature control of each part in the crate mould to meet the requirements of the tube blank forming process, and the mandrel in the large-size tube forming mould to have a heating temperature control device.

5. The center line of each part in the crate mould shall coincide with the center line of the mould body and the screw after assembly.

6. When the forming die is not used for a long time, all parts shall be cleaned up, coated with antirust oil, and sealed at the inlet and outlet for storage after assembly. Heavy objects are not allowed on the stored crate mould body to prevent the mould from deforming.

If you are interested in our products, you can click Dustbin Mould to learn more information.

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If you want to solve the common problems in the mould test of the Crate Mould(FURNITUREMOULD), you have to know where the problem is in order to solve the problem. Let's talk about some common problems in the test of crate mould.

1. The main runner die bonding

The solution to the problem is to polish the main runner, with the nozzle coinciding with the mould centre, reduce the temperature of the crate mould, shorten the injection time, increase the cooling time, check the nozzle heating ring, polish the surface of the crate mould, and check whether the material is contaminated.

2. Difficult demoulding of plastic parts

The solution to the problem is to reduce the injection pressure, shorten the injection time, increase the cooling time, reduce the temperature of the crate mould, polish the surface of the crate mould, increase the demoulding slope and reduce the gap at the insert.

3. Poor dimensional stability

The solution to the problem is to change the temperature of the charging barrel, increase the injection time, increase the injection pressure, change the screw back pressure, increase the temperature of the crate mould, reduce the temperature of the crate mould, adjust the feed amount, and reduce the return ratio.

4. Surface corrugation

The solution to the problem is to adjust the feeding amount, raise the mould temperature of the crate, increase the injection time, increase the injection pressure, raise the material temperature, increase the injection speed, and increase the size of the sprue and gate.

5. Plastic warpage and deformation

The solution to the problem is to reduce the crate mould, reduce the material temperature, increase the cooling time, reduce the injection speed, reduce the injection pressure, increase the screw back pressure and shorten the injection time.

If you are interested in our products, you can click Dustbin Mould to learn more information.

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The defects of most crate products are caused during the plasticizing and injection stages of the Crate Mould(FURNITUREMOULD), but sometimes they are also related to unreasonable design. The influencing factors include the type of injection port, the number of mould cavities, location and size, the design of the cold/hot runner system, and the structure of the product itself. Therefore, in order to avoid product defects caused by the design of the crate mould, we need to analyze the crate mould when making it.

After the test results of the crate mould, the operator usually needs to re-evaluate the specific conditions of the crate mould to avoid unnecessary cost and time in the process of modification. In most cases, in order to make up for the deficiencies in the die design of crates, the operator may make incorrect settings without knowledge, because the parameter setting range required to produce qualified products is very small, and any deviation in parameter setting may lead to the quality of the final products far beyond the allowable error range.

The purpose of the mould test of the crate mould is to find out the optimized technological parameters and the design of the crate mould. Not just to get a good sample. This is very important. Even if factors such as materials, machine settings or environments have changed, a stable and uninterrupted mass production environment can still be ensured.

If you are interested in our products, you can click Dustbin Mould to learn more information.

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The quality of the hot work of the Crate Mould(FURNITUREMOULD) has a significant impact on the performance and service life of the mould. In the actual life work, our mould shop requires the improvement of the design and production of various moulds, and there will be problems in the specific operation.

The quenching deformation and cracking of the working parts of the crate mould, and the early fracture of the use process are all related to the hot working process of the tool.

(1) Forging process, which is an important part of the manufacturing process of crate mould parts. For moulds of high alloy tool steels, technical requirements are often imposed on metallographic structures such as material carbide distribution. In addition, the forging temperature range should be strictly controlled, the correct heating specification should be established, the correct forging force method should be used, and the post-forging slow cooling or timely annealing should be carried out.

(2) Preparatory heat treatment. Pre-heat treatment processes such as annealing, normalizing or quenching and tempering should be used according to the materials and requirements of the crate mould working parts to improve the structure, eliminate the structural defects of the forged blank, and improve the processing technology. The high-carbon alloy dies steel can eliminate the reticulated secondary cementite or chain carbide after appropriate preliminary heat treatment, so that the carbide is spheroidized and refined, and the uniformity of carbide distribution is promoted. This is beneficial to ensure the quality of quenching and tempering and improve the life of the mould.

(3) Quenching and tempering. This is a key link in the heat treatment of crate mould. If the superheat occurs during quenching, not only will the workpiece cause greater brittleness, but also cause deformation and cracking during cooling, which seriously affects the life of the mould. Special care should be taken to prevent oxidation and decarburization during die quenching. The heat treatment process specification should be strictly controlled. Vacuum heat treatment can be used if conditions permit. After quenching, it should be tempered in time, and different tempering processes should be adopted according to technical requirements.

(4) Stress relief annealing. The working parts of the crate mould should be subjected to stress relief annealing after roughing, with the purpose of eliminating the internal stress caused by rough, so as to avoid excessive deformation and cracking caused by quenching. For moulds with high precision requirements, it needs to be subjected to stress-relieving and tempering after grinding or electric machining, which is beneficial to stabilize mould precision and improve service life.

If you are interested in our products, you can click Dustbin Mould to learn more information.

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The quality of the Dustbin Mould(FURNITUREMOULD) is not a simple topic, it includes the following aspects:

(1) Product quality: the stability and conformity of the product size, the smoothness of the surface of the product, the utilization rate of the product materials, etc.;

(2) Service life: the number of work cycles or the number of parts produced by the waste bin mould under the premise of ensuring the quality of the product;

(3) Maintenance and maintenance of the dustbin mould: whether it is the most convenient to use, easy to demould, and the production auxiliary time is as short as possible;

(4) Maintenance costs, maintenance periodicity, etc.

Taizhou Huangyan Rongwei Plastic Mould Co.,Ltd.is located in Huangyan,which is the mould town in China. Our company have more than 20 years professional experience in mould field. We have the most advanced equipments for mould manufacturing as well as the most qualified trained employees. We have made full use of high techniques as CAD/CAM/ CAE for a long time and summarized a set of specific expeiience. Our mould are mainly exported to the contries in Europe, Mid-East,Africa and so on.

Click Crate Mould to learn about more information.

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The steel material of the Crate Mould(FURNITUREMOULD) is generally 718 or 2738, and it has to undergo multiple processing steps such as forging, CNC milling, roughing, quenching and tempering, and CNC milling. The plastics in the crate are generally plastics such as HDPE and PP.

The crate mould is generally a four-point hot runner, and the pusher plate is ejected. The advantages of using hot runners are: 1. Material saving, no need to cut gates, and then crush. 2. Speed up the cycle and increase production efficiency. 3. Reduce costs in the long run.

The crate mould has the following special requirements: 1. The exhaust effect is better, otherwise the plastic products will have black spots, etc., and the burnt will be severe. 2. The superimposed effect is better, the superimposed does not shake. 3. The line is better, no grind. 4. The mould should be highly polished, because the crates are daily necessities, so there should be no flash, burrs, etc., to avoid scratching the skin.

Click Dustbin Mould to learn about more information.

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How to make a Crate Mould(FURNITUREMOULD)? First, the steel material should be selected for the mould base and the mould core cavity portion. For example, to produce a pair of four-out crate mould, pre-hardened steel with a hardness higher than 33 must be used as the mould base, and then the appropriate mould standard parts should be selected. Second, the hardness of each piece of steel must be controlled, not too hard.

Then, the friction and guiding parts of the crate mould must be finished and no manual work can be used. If you need to mould a durable tote, you must use a low melt index HDPE material, such as a plastic with an index of 4 or 6. Second, make sure the cooling system is optimal. To create a durable and durable hydraulic drive with the machine for automatic ejection, the ejection action during mould opening can be smoother.

Most of the world's crate mould manufacturers use accelerators to increase the injection speed of the melt. The design of the crate mould is equally important. The ejection mode of the crate mould is preferably designed to be mechanically ejected, so that the ejection operation can be completed when the mould is opened.

Click Dustbin Mould to learn about more information.

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Different types of Chair Mould(FURNITUREMOULD), different types of moulded plastics (same type of mould), different assembly methods vary with different start and precision requirements. Therefore, the assembly drawing and part drawing should be carefully studied before assembly. Determine the assembly baseline by understanding the function, characteristics, and technical requirements of each component. After careful assembly, all quality indicators of the product have been achieved, including the accuracy of the mould movement and other technical requirements during use.

Assembly standard

Assembly data refers to the data used to determine the relative position of parts or components in a product during assembly. It can be broadly divided into:

(1) Main working parts, such as cores, cavities and inserts, shall be used as assembly reference parts;

(2) Take the template side base surface of the guide sleeve or mould as the assembly base surface.

2. Assembly accuracy

Assembly accuracy refers to geometric accuracy, machining accuracy, and motion accuracy after assembly. The assembly accuracy of the chair mould includes:

(1) mutual accuracy of each part, such as distance dimensional accuracy, coaxiality, equality, verticality, etc.;

(2) Relative motion accuracy, such as transmission accuracy, linear motion and rotational motion accuracy;

(3) matching accuracy and contact accuracy, such as matching gap and overflow contact conditions;

(4) The wall thickness of the plastic moulded part. When manufacturing a new mould, the wall thickness of the moulded part should deviate from the lower limit of the size.

Click Crate Mould to learn about more information.

xiu May 19 · Tags: chair mould, crate mould
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