How to improve the thimble marks in injection molding

What is the cause of thimble printing in injection molding?

Injection molding products manufacturers appear thimble printing is caused by many aspects, such as mold temperature is too high, injection pressure is too high, holding pressure is too large, ejector pin distribution is unreasonable, demoulding force is not enough, and so on.

How to improve the thimble marks produced in the injection molding process?

1. Avoid over injection of plastic melt.

2. Reduce the injection pressure and packing pressure.

3. Reduce the injection speed and optimize the feed system design to achieve good filling.

4. Properly increase the mold temperature, prolong the cooling time and reduce the cooling rate. Optimize the temperature control and product structure, and encourage the uniform cooling of products in the mold.

5. Analyze the ejection resistance and distribution, and then use a suitable ejection system with appropriate ejector pin distribution to achieve ejection balance.

6. Improve the surface finish of the cavity. In the final stage of polishing, Polish along the ejection direction of the plastic part.

7. Proper use of release agent.



About JasonMould Industrial Company Limited

Jasonmould 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: JasonMould Industrial Company Limited
Add:  LongGang Village,LongXi Town,BoLuo County,HuiZhou City,GuangDong Province, China
Tel: 86-752-6682869
Email: [email protected]


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