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How to deal with the quality problems in injection molding
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How to deal with the quality problems in injection molding

Views: 2     Author: Site Editor     Publish Time: 2023-06-07      Origin: Site

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How to deal with the quality problems in injection molding

In the process of injection molding, there are often various quality problems, which will affect product quality and production efficiency. Therefore, it is very important to analyze and solve these problems to produce high quality products and improve production efficiency. This article will introduce some common injection molding quality problems and solutions.


One, lack of material

Lack of material means that the material is not filled with enough plastic parts during the injection molding process. This may be due to the low temperature of the material, insufficient injection pressure, and too slow injection speed. Solutions include increasing the temperature of the material, increasing the injection pressure and injection speed.


Second, air pockets

Air pockets are bubbles that form inside plastic parts. This may be due to the material temperature is too high, the injection speed is too fast, and the mold temperature is too high. The solution includes reducing the material temperature, reducing the injection speed, reducing the mold temperature, etc.

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3. Depression

Depression refers to the formation of pits on the surface of plastic parts. This may be caused by insufficient injection pressure, insufficient cooling time, and too high mold temperature. Solutions include increasing injection pressure, increasing cooling time, reducing mold temperature, etc.


4. Cracks

A crack is a crack formed inside or on the surface of a plastic part. This may be due to the material temperature is too high, the cooling time is insufficient, the injection speed is too fast and so on. Solutions include reducing the material temperature, increasing the cooling time, and reducing the injection speed.


Five, color difference

Color difference means that the color of plastic parts is inconsistent with the required color. This may be due to the material temperature is too high or too low, color powder or color master too much or too little. The solution includes adjusting the temperature of the material, adjusting the amount of color powder or color masterbatch.

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6. Size deviation


Size deviation means that the size of plastic parts is not consistent with the required size. This may be due to excessive shrinkage of the material, unreasonable mold design and other reasons. The solution includes adjusting the shrinkage rate of the material and optimizing the mold design.


In solving the above problems, production efficiency and product quality can be improved by means of technological improvement, process optimization and equipment maintenance. For example, efficient cooling systems can be used to speed up cooling, automated production to reduce human error, and regular maintenance of equipment to ensure its normal operation. At the same time, it is also necessary to monitor and control the injection molding process, discover and solve problems in time, and ensure the stability and reliability of the production process.

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