Injection Molding Problems: Plastic Warping and Deformation
author: Universe plastic
2024-07-08
Warpage deformation of injection molded plastics is one of the common problems in injection molding production. Most of it is due to uneven internal stress in the material, which causes the product to deform after cooling and demoulding. It seriously affects the dimensional accuracy and appearance quality of the product, making the product unable to be delivered qualified.
How to prevent and solve the warping deformation of injection molded plastics? The following are the detailed causes, preventive measures and solutions for injection molding warpage from Universe Plastics Engineers:
Causes of injection molding warpage deformation
1. Uneven cooling
The cooling effect of injection molding is uneven, resulting in different cooling rates in different areas, inconsistent shrinkage rates, and internal stress resulting in deformation.
2. Material factors
Factors such as the fluidity, shrinkage and crystallization characteristics of plastic raw materials will affect the warpage deformation of products.
3. Uneven filling
Molten plastic fills the mold cavity unevenly, causing uneven stress in various parts of the product.
4. Unreasonable mold design
Problems such as runners, gates, and uneven wall thickness in mold design can cause stress concentration and warpage.
5. Injection molding parameters are wrong
Improper settings of parameters such as injection speed, pressure, holding time and cooling time can lead to product deformation.
Methods to prevent and solve injection molding warpage
1. Optimize mold design
Ensure uniform wall thickness of the product, rationally design the cooling system, and optimize the position of the runner and gate.
2. Adjust processing parameters
Adjust the injection speed and pressure, pressure holding time, and cooling time.
3. Choose the right material
Choose materials with low shrinkage, good stability, and uniform crystallization to reduce product deformation.
4. Improve mold manufacturing
Ensure the processing accuracy of the mold, and polish and anti-rust the surface of the mold.
5. Post-processing process
The article is annealed and appropriate adjustments and corrections are made to restore its original shape.
Summarize
Injection molding warpage is a comprehensive problem involving many factors such as mold design, injection molding parameters, cooling effect, material selection, etc. These contents must be reasonably optimized to effectively prevent and solve warpage deformation problems and improve product quality and production efficiency.
Dongguan Universe Plastic Factory has more than 15 years of injection molding experience, a professional injection molding team and advanced injection molding equipment, and can provide high-quality and cost-effective injection molding services.
If you are looking for a high-quality injection molding factory, please contact us to get the latest service quotation.
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