Plastic Mould


A set of reliable mold design is mainly reflected in quality of molded plastic products (appearance quality and dimensional stability), convenient, rapid, concise processing and manufacturing, which saves money and manpower, leaves room for correction and improvement, safe and stable in use, easy to maintain, has a short molding cycle and long service life during injection molding, and reasonable mold manufacturing processability.
1 Main process of our mold design
Customers provide product drawings→analyze products→confirm plastic varieties→confirm mold material→transfer engineering drawings→make a mirror image by shrinking→improve assembly drawing→order mold base→order mold core material→draft→3D parting→determine runner /Gating method→Refer to layout drawing for structural design→dismantle inserts→correct 3D→engineering drawings including: (mold core/insert/mold blank/parts)→make BOM table→proof and review.
2 Several aspects that should be paid attention to in design
When we start mold design, we should pay more attention to considering several options, weigh advantages and disadvantages of each option, choose one of them, and take T mold seriously.
After handing over design plan, we will communicate more with customers to understand processing and manufacturing conditions. Each set of molds will have a fixed analysis experience, sum up process of gains and losses, in order to continuously improve level of mold design.
Mold design department is supposed to be a whole in terms of mold design summary conclusions to have a unique style.
3 Mould design basis
Main basis is product drawings and samples provided to us by our customers. We will carefully analyze, digest products and samples. At the same time, we will check all items one by one during design process.
4 General process of mold design
1. Analyze, digest products and mold plates.
2. It should be understood whether customers has requirements for specifications of injection machine to determine size of mold.
3. Determine and rank number of cavities.
4. Parting surface is determined.
5. If there is a slider, oblique square structure should be understood first.
6. Design of gating system
7. Determination of mosaic structure.
8. Ejection. Reset system design.
9. Cooling and heating system design.
10. Guiding. Positioning device.
11. Determine mold base and select standard parts.
12. Selection of mold steel.
13. Complete structure diagram, mold base diagram, and cut material.
14. Finally, print out drawing, check it, submit it to mold design team leader and supervisor.
5 Trial and repair
Although mold design is carried out under expected process conditions when molding material and molding equipment are selected, our understanding is often imperfect. Therefore, after mold processing is completed, mold trails must be performed to see how quality of molded part is. After finding that there is always a problem, repair model to eliminate errors.
6 Organize data and archive
After test, if mold is not used temporarily, we will completely wipe off mold release residue, dust, oil, etc., apply butter or other anti-rust oil or anti-rust agent, and keep it in storage place.
From beginning of design of mold until mold is successfully processed and passed inspection, technical data generated during this period, such as task book, part drawing, technical specification, mold assembly drawing, mold part drawing, base drawing, mold design manual, inspection records, trial and repair records, etc., are systematically sorted, bound, numbered and archived according to regulations. Once mould be shipped to customers, we will pack and submit all data to customers.
 
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