Factors affecting the number of cavities in Plastic Injection Molds

The cavities in Plastic injection mold is not the more the better, also not all molds can be done with 4 cavities or 8 cavities. So what are the factors affecting the numbers? Let’s have a look below:

1. Relationship between the product size and equipment.

When the part belongs to large or medium size, generally speaking, single cavity is used. On the one hand, it is necessary to consider the fluidity of plastic material filling mold when injection molding, so as to ensure that plastic material can smoothly fill the mold cavity. The second aspect is that the design of more than one cavity will make the mold volume increase leading to aggravation, so that the processing is difficult. The small and medium-sized plastic products can be designed a number of cavities, so that better play equipment and mold capacity, improve production efficiency, economic production.

2. Local materials should be used to make full use of the existing equipment.
3. When the precision of plastic parts is not high, the requirements for mold creation and product process molding control requirements will also be reduced, so, in this case, should be calculated according to the capacity of the equipment, so as to calculate the number of cavities, because when the precision of plastic parts is too high, too much cavity design will affect the product quality assurance.
4. For plastic parts with complex shape or high precision, sometimes the customer increases the production efficiency by adding a mold cavity, but after adding the mold cavity, the mold structure will become much more complicated, and the precision will also be improved. Therefore, it is necessary to consider the number of mold cavities to focus on economic benefits, and avoid uneconomic ones.
5. Product batch requirements.

When plastic parts production batch requirements, the need to produce large batch or large, in order to complete the corresponding capacity of the mold, the need to design a number of cavities.

About PTJMould Industrial Company Limited

PTJmould 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.