Design principles for wall thickness of plastic products

The principles of wall thickness design for plastic parts are as follows:

1. Making the wall thickness even is the first principle of plastic part design, it can make filling, cooling and shrinking even, good molding, high dimensional accuracy and high productivity. If the wall thickness can not be even due to some special requirements of plastic parts, the inclined plane should be used to gradually transition between the thick and thin walls. In addition, the ratio of thickness must be strictly controlled as follows: thermosetting plastic: pressing 1:3, extruding 1:5 thermoplastic: injection molding 1: (1.5~2);

2. Under the conditions of meeting the requirements of the structure and use of the plastic parts, use a smaller wall thickness as much as possible, so that we can get: the mold cools quickly, the part weight is light and saving material:

3. The design of the wall thickness of the plastic part should be able to withstand the impact and vibration of the mold ejection device, etc.;

4. There must be sufficient thickness at the connection and fastening place of the plastic part, the place where the insert is buried, and the junction of the plastic melt at the hole (welding mark);

5. When determining the wall thickness, the required strength during storage and handling must be considered;

6. To meet the wall thickness required for melt filling during molding, it is necessary to avoid insufficient filling or thin walls that are easy to burn, but also to avoid melt fracture or thick walls that are easy to produce depressions;

7. Different plastics have different reasonable wall thicknesses due to their different fluidity, see list 1 for details;

8. The fire rating required by the product, different fireproof grades correspond to different product wall thicknesses, if the product wall thickness has been determined, in order to achieve the required fireproof grade, it is often necessary to replace higher grade materials, if there is no suitable material, then it needs to be increased product wall thickness.


Tags: Injection Mold | Injection Mold Supplier | Injection Mold Factory | Mold Factory | Mold Supplier | Injection Molding |
Related News about USM Injection Mold
  • Slider designing tips 2

    Slider designing tips 2

    Nov 22, 20239. The molding parting surface of the slider molding should be made as a shut-off surface as possible, and the width of the shut-off part should be at least 8mm, and do not make a shut-off surface;...view
  • Temperature system of injection mold

    Temperature system of injection mold

    Feb 8, 2022Hi everyone,the mold cooling time is the longest during injection, so the design of mold temperature system controlling is very important, we will talk about mold cooling, heating system in following...view
  • Banana gate of plastic injection mold runner system design

    Banana gate of plastic injection mold runner system design

    Feb 7, 2022In order to get the best injection quality, the gate type must be selected carefully, the coommon gate tyeps are: direct gate, side gate, pin-point gate, sub gate,valve gate of hot runner etc. Among...view
  • What is Plastic Injection Mold?

    What is Plastic Injection Mold?

    Dec 27, 2021The plastic mold is used for injection molding, it is assembled with cavity, core and side slider together, with ejection system and adjustments to produce plastic products by different shapes and...view
  • Slider designing tips 1

    Slider designing tips 1

    Aug 3, 20221. After the slider core pulls out, the length of staying in the guide pin slot should not be less than 2/3 of the total length of the slider, for special cases, the slider slot can be partially...view
  • Plastic cooling factors by injection parameter

    Plastic cooling factors by injection parameter

    Feb 10, 20221. Plastic parts design: mainly for the wall thickness of plastic products. The thicker thickness of the product, the longer the cooling time. Generally speaking, the cooling time is approximately...view