Bubbles have always been a difficult problem in the process of injection molding. How to deal with them

Injection mold belongs to a pouring method. Since it is pouring, there will be various problems in the processing process. The occurrence of problems proves that we have made subtle mistakes in the processing process. However, some are easy to deal with and some are not easy. For example, bubbles appear, because bubbles are a problem that many manufacturers are worried about. Today, I will share some bubble treatment methods:

1、 When the thickness of the product is large, the cooling speed is faster than the outer surface speed of the central part, and therefore, when cooling, the shrinkage of the resin central part side to the expansion of the surface side progresses to the central part to generate a short shot, which belongs to a vacuum bubble. The solution includes:

1. Determine the reasonable gate and gate size according to the wall thickness. The gate height is generally 50% – 60% of the product wall thickness;

2. Keep a certain amount of supplementary injection until the gate is sealed;

3. The spraying time shall be slightly longer than the grid sealing time;

4. Reduce the injection speed and increase the injection pressure;

5. Use a material with a high melt viscosity grade;

2、 Due to the generation of bubbles of volatile gas, the solution method is:

1. Sufficient pre drying;

2. Lower the resin temperature and do not generate gas;

3. Poor fluidity, due to bubbles, can be solved by increasing the resin and mold, and increasing the temperature of the injection speed.



About Huizhou Dj Molding Co., Ltd

Dj Mold is a China mold maker of plastic molds- injection mold, die casting moulds, plastic blow molding, rotational molding, medical plastic injection molding, two shot plastic injection molding, insert molding, overmolding, metal injection molding, micro injection molding, powder injection molding, ceramic injection molding, liquid injection molding, husky injection molding, household mold, casting mold, die mold tool, custom molds, china moulds, rapid prototyping tooling, plastic prototyping tooling, punch press tooling, die and tooling for mobile/ cell phone parts, automotive parts, vacuum cleaners, rechargeable tools, telephones, copiers, computers, multimedia speakers, and many other electronic products and household appliances. And also a plastic product manufacturer, mold manufacturer China– plastic parts, plastic water tank, plastic balls, plastic containers, plastic buckle, plastic anchor, plastic hanger, plastic spoon, plastic pipe fitting, plastic tumble, plastic tableware, plastic cups, plastic bottles, plastic tray, plastic cosmetic container, plastic case, plastic food container, plastic chairs, plastic caps, plastic cap closure, plastic tubes, plastic water pipes, plastic knobs, plastic tubing, plastic utility boxes, plastic racks and so on.

Person: James Yuan
Company: Huizhou Dj Molding Company Limited
Add:  LongGang Village,LongXi Town,BoLuo County,HuiZhou City,GuangDong Province, China
Tel: 86-752-6682869
Email: [email protected]

Site: https://www.jasonmolding.com/custom-injection-molding/

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