Plastic Contactor Coil Mould

Types of plastic injection mould gate design

1. Direct gate or sprue gate

Used in the case of a single cavity, or when placing the gate directly to the base of the molded product. Residual strain tends to occur because the injection pressure will directly apply to the molded product. Mold construction is the simplest.

2. Tab gate

This is a method that sets up a tab on the side of the molded product and places a gate there. Normally, the gate and the tab should be placed at the right angle. Gate seal will happen on the gate part, so suppressing residual strain and flow marks inside the tab are possible.

3. Fan gate

Its structure is similar to the side gate, but the gate width is bigger and fan-shaped. Used in the large-size molded products.

4. Ring gate

Used like the disk gate. The ring part must get filled first and then the cylinder part, otherwise, the weld will occur.

5. Edge gate

This type is most generally adopted and used well in multi-cavity mold. Its shape is rectangle or semicircle and placed at the side of the molded product.

6. Overlap gate

It is the same side gate but the gate has in front of products.

7. Dis gate

This gate is used to prevent eccentricity and weld when molding a disk or cylinder-shaped one. However, there is a disadvantage that the finishing of the gate part is difficult.

8. Flash gate

This type will be applied to the plate-shaped molded product. This type is effective at preventing deformation by suppressing residual strain.