The way to measure the filling uniformity of a multi cavity die is called runner balance. Multi cavity mold is not as consistent as single cavity mold, but because multi cavity mold can usually produce parts at a lower cost, it is necessary to ensure that the injection mold is designed as a balanced multi cavity mold. There are six key factors that affect the flow balance.
Mold precision
Runner length: from the material inlet to each cavity, the flow length should be the same for all cavities.
Runner diameter: similar to the importance of runner length, the runner flow diameter must be equal to each cavity. Changing the flow diameter can cause new problems.
Gate cross-sectional area: for multi cavity mold, adjusting the gate size can also make the cavity achieve the purpose of feeding at the same time. Gate also plays a role in preventing early solidification and backflow of melt in mold cavity. The gate is usually made into the smallest cross section in the pouring, which is conducive to the separation of the plastic part and the gate after the plastic part is injected.
Cooling: effective cooling is necessary to ensure that there is no difference in mold temperature.
Exhaust: if the gas produced in the cavity due to various reasons cannot be eliminated during the injection process, the molding defects of plastic parts will be caused, such as bubble, insufficient filling, fusion joint, etc.
Clamping pressure: if there is no same clamping pressure on the injection mold, uneven exhaust may occur.
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.
Contact:
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]
Site: https://www.jasonmolding.com/custom-injection-molding/
