A reliable plastic mold design is mainly reflected in the quality (appearance quality and size stability) of the forming plastic products. It is convenient, fast, and concise when processing and manufacturing. Safe, stability, easy maintenance, short molding cycle, long life life, and reasonable mold manufacturing process in injection molding.
01. The main process of factory mold design
Customers provide product map → analyze product → confirm plastic varieties → confirm mold material → transfer engineering chart → multiplier as a mirror phase → improve the formation map → make models → make models → unplugged → 3D division → determine the runner road /Putting the mouth method → refer to the rank diagram for structural design → disassembling mosaic → correction 3D → engineering drawing (mold/inlaid parts/mold/loose parts) → do BOM table → school pairing review.
02. Several aspects that should be paid attention to
1) When we start the mold design, we should pay more attention to several schemes, measure the advantages and disadvantages of each plan, and choose one of them, and take it seriously for the T model. Pay attention to the public account: Mufeng Machinery, share mechanical and technology cutting -edge information, learn the professional knowledge of machinery, let us increase their postures together! Because of the reason for time, it was considered a reasonable design at that time, and it would definitely be possible to improve after production and use practice.
2) After handing out the design plan, communicate more with the factory to understand the processing process and the situation of manufacturing. Each set of molds should have a fixed analysis experience and summarize the process of gains and losses in order to continuously improve the level of mold design.
3) When designing, refer to the similar drawings designed in the past to learn from their experience and lessons.
4) The mold design department should be a whole. The members of each design cannot be politically. Especially in terms of the conclusion of the model design summary, we must have a unique style.
03. Mold design basis
The main basis is the product drawings and models provided by customers to us. Designers must carefully analyze and digest the products and models. At the same time, in the design process, all projects must be checked one by one.
1. Correction of dimensions related dimensions
1) Plastic products with high appearance requirements and low size and accuracy requirements, such as toys, except for the specific size, as long as the remaining size is better.
2) Products with strict appearance requirements
Whether the slope of the departure is reasonable.
Product wall thickness and uniformity.
Plastic type. (The choice and determination of mold steel)
Surface requirements.
Product color.
In general, the color has no direct impact on the mold design. When the wall is thick and the appearance is large, it is easy to produce uneven color; and the darker the color, the more obvious the product defect is exposed.
2. Is there any post -treatment after the product is formed
If there is a surface electroplating product, and a variety of cavities, it is necessary to consider setting up auxiliary flow tract to connect the products together, and the plating process will be separated.
3. Batch of products
The batch of products is an important basis for mold design. Customers must provide a range to determine the number of mold cavity, size, mold selection and life.
4. Injection molding machine specifications
5. Customer other requirements
Designers must consider and check carefully to meet customer requirements.
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Paint Barrel Mould |
04.Mold design roughly process
1) Analysis and digestion of products and models.
2) Understand whether the customer requires the specifications of the injection machine to determine the size of the mold.
3) The number of cavities is determined and ranked.
4) Facial Facial determination.
5) If you have a row and a trapezine structure, you should first understand it.
6) Pouring system design
7) Determination of inlaid structure.
8) Design of the top and reset system.
9) Cooling and heating system design.
10) Guide and positioning device.
11) Determine the mold embryo and select the standard parts.
12) Selection of mold steel.
13) Complete the structural diagram, mold embryo map, and opening.
14) Finally print out the picture, check, submit the mold design team leader, supervisor.
05.Model and Model Repair
Although the mold design is used under the expected process conditions when selecting molding materials and molding equipment, people's understanding is often not perfect. Therefore, after the mold processing is completed How is the quality. After discovering it, it is always modified by eliminating errors.
Most of the types of plastic parts have adverse phenomena, the reasons are also complicated, there are molds, as well as process conditions, and the two often interweave. Pay attention to the public account: Mufeng Machinery, share mechanical and technology cutting -edge information, learn the professional knowledge of machinery, let us increase their postures together! Before repairing the mold, carefully analyze and study according to the actual situation of the poor phenomenon of plastic parts, and to find out the reasons for the cause of plastic parts defects. Because the formation conditions are easy to change, the general practice is to change the forming conditions first. When the change of the molding conditions cannot solve the problem, consider repairing the mold.
The repair mold should be more cautious, not very grasped and not acting lightly. The reason is that once the mold conditions are changed, the transformation and restoration of the original state cannot be made.
06.Set up the information for archiving
After the mold is tested, if it is not used for the time being, it should be completely erased with removed mold residue, dust, oil, etc., apply butter or other rust oil or rust -proof agent to send it to the storage place for custody.
Start the design mold to the mold processing and pass the inspection, and the technical materials generated during this period, such as task letters, components, technical manuals, molds, mold parts, bottom diagrams, mold design manuals, inspection records, inspection records Tables, test models, and modification records, etc., files systematically, binding, and numbers in accordance with regulations. It seems troublesome to do this, but designing new molds for future repair molds is very useful.
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