Scorch marks refer to the phenomenon of blackening at the end of the flow because the gas in the mold cavity cannot be discharged in time.
Causes of coke marks:
1. The cavity air cannot be discharged in time
2. Material degradation
a. Excessive melt temperature
b. Too fast screw speed
c. Improper design of runner system
Improvement method:
1. Mold design
a. Add an exhaust system where poor exhaust is easy to occur
b. Increase the size of sprue, shunt and gate
2. Process conditions
a. Reduce injection pressure
b. Reduce injection speed
c. Reduce the screw speed
d. Reduce barrel temperature
e. Check whether the heater and thermocouple are in normal state.
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.
Contact:
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/
