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How much do you know about the solution of snake flow mark in injection molding process?

Posted by: Mu Ju 2021-11-23 Comments Off on How much do you know about the solution of snake flow mark in injection molding process?

In the process of injection molding, it is easy to have snake flow marks and other adverse problems. Serpentine flow mark refers to the irregular flow line with gate as the middle on PC products. Different from the “fingerprint” line, the turbulent flow mark appears along the material flow direction rather than perpendicular to the material flow direction.

The reason for its formation may be that the melt injected into the mold cavity is greatly impacted, resulting in negative and smooth flow in the cold mold.

In terms of injection molding technology, the main methods to solve snake flow marks are as follows:

1. Increase the melt temperature to reduce the premature cooling of the melt;

2. Raise the mold temperature, especially the temperature at the part with turbulent flow mark, so as to prevent the melt from sliding due to premature cooling in the mold cavity;

Injection molding multi-stage injection setting

3. Multi stage injection is adopted to reduce the injection rate and injection pressure at the position with turbulent flow marks;

There are several solutions for mold technology:

1. Change the gate position to change the flow mode of molten material;

2. Increase the cold material trap to prevent the cold material from sliding in the die. It is mainly to set a large enough cold material bag to remove the air flow in the mold cavity during filling, and add a cold material bag at the end of filling to lead out the filling air flow.

pintejin Mold to the snake flow mark problem in the process of product injection molding is shared here. If you want to know more about processing technology, you can enter the official website of pintejin Mold, where there are detailed technical Encyclopedia for you to query. Welcome to visit!



About China pintejin Molding Industrial Company Limited

pintejin 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.

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