Injection molding problem: plastic burrs

author: Universe plastic

2024-01-04

Plastic burrs in injection molded products are a common problem in injection molding. Too many burrs will affect the appearance and quality of the product. How to effectively reduce injection burrs is crucial to improving production efficiency and product quality.

The following are some effective methods and precautions provided by Universe Plastic Engineers to reduce or avoid burrs during the injection molding process:

Check the mold

1. Keep the mold clean to avoid foreign matter entering the mold and affecting closing.

2. Check the closing condition of the mold to ensure that there are no gaps after the mold is closed, otherwise the worn area needs to be repaired in time.

3. Check the exhaust system of the mold to ensure that the air can be discharged smoothly to avoid material overflow during injection molding.

Injection molding burr optimization equipment

Adjust injection molding machine

1. Appropriately reduce the injection pressure and speed to reduce overfilling and overflow of material from the mold.

2. Adjust the melt temperature to avoid excessive fluidity of the material caused by excessive temperature, resulting in burrs.

3. Adjust the holding time to ensure that the material is fully solidified before opening the mold to reduce the generation of burrs.

4. Ensure that the clamping force of the injection molding machine is sufficient to avoid gaps in the mold due to injection pressure.

5. Adjust the cooling system of the injection molding machine to accelerate the cooling and solidification of the plastic and reduce the generation of injection burrs.

Check injection molding material

1. Check the fluidity and shrinkage rate of the injection molding material. Unqualified materials may cause injection burrs.

Quality testing and analysis

1. Carry out quality inspection during injection molding production and pick out burr products in time.

2. Establish problem analysis ideas, analyze the causes of glitches, and continuously test and solve problems.

Precautions when making molds

1. Choose mold materials with high hardness and wear resistance to reduce burrs caused by wear on the mold closing surface.

2. Perform appropriate surface treatment on the mold closing surface, such as chromium plating and nitriding treatment, to increase hardness and smoothness.

Summarize

We hope that through the methods we have described above, we can effectively solve or avoid the problem of plastic burrs during your injection molding process.

Among them, ensuring mold functionality, appropriate injection parameters, and regular mold maintenance and testing are the keys to avoiding injection burrs.

Dongguan Universe Plastic Co., Ltd. has more than 15 years of injection molding experience. If you have injection burr problems, you can consult us and learn from each other.

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