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mold design

Injection molding | locking block & locking block pin

March 15, 2021 by mechanicaleng blog Leave a Comment

locking block injection molding

When we design a mold, if angular slider is too long, we need use locking block  to make angular slider pin is shorter and stronger. If we don’t make locking block , angular slider pin can be broken during working time. advantage of  block: easy installation and maintenance, although the angular pin mold was broken […]

Plastic injection mold cooling system design

February 4, 2019 by mechanicaleng blog 3 Comments

Cooling layout between a core and mold base construction

Design injection mold cooling system is very important. Cooling time is the longest circle in injection molding process, it takes up 50~80% of molding circle. Molten plastic has high temperature, If we don’t make cooling channels, the molding circle is very long, it is cause of molded defect as bending, sink marks, weld line, short […]

Plastics injection mold design calculate cavity quantity

January 20, 2019 by mechanicaleng blog 4 Comments

plastic injection molding runner system

Have you ever been worried when calculate cavity quantity of injection mold design? Do you want to know how many cavities are suitable for your machine? I think you don’t want to use 250 tone machine for production small items, it is very to waste your money. How to calculate the cavities number of injection […]

plastics injection molding parting line

November 7, 2018 by mechanicaleng blog 3 Comments

plastics injection molding parting line

In plastics injection molding, parting line is the dividing line on sample that separate cavity and core. Product will change draft angle direction at parting line. Flash trouble always appear at parting line. Sometimes, to improve flash we will make step at parting line. For this changing, you have to meet designer because components use […]

Plastic molding how to design gas vent

September 26, 2018 by mechanicaleng blog Leave a Comment

gas vent plastic molding

Gas vent is space that air can go out of mold. When molten plastics fills up the mold. The air or molten plastics left in the mold will generate gas. If they can not go out of mold, appearance of samples will not good: have gas, fire, …

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