Basic Mould construction

The Figure below shows Three-Plate Mould base type with closed position, basically 3 plate type and 2 plate type has some main plate.

1. Fixed Clamping Plate or Top Plate: The function of top plate is to holds the
fixed side of the mould to attached at the fixed platen of the injection machine at this plate will attach locating ring, eye bolt, and sprue bush.

2. Runner Stripper Plate: The runner stripper plate only used in 3 plate moulds type, the function is to cut resin from nozzle in top of sprue bush, and pull the
runner by runner locking pin.

3. Fixed Mold Plate or Cavity plate: The function of cavity plate is to hold
cavity side of product, leader pin, support pin, Puller bolts, and Angular pin when slider attached.

4. Movable Cavity Plate or Cavity plate: It used to attach core side of product, return pin, leader bush and slider core if needed.

5. Back up Plate or Support plate: The function of support plate is to support
cavity plate, attach the hole for return pin's spring, and cooling channel when
in cavity plate can not make it.

6. Spacer Block: The spacer blocks are mounted between the movable clamping plate (bottom plate) and the movable cavity plate to give space and allow the ejector plate to move when ejecting the part and the required length of spacer block depend on ejector stroke that needed to eject product.

7. Ejector retainer plate: The function of the ejector retainer plate is to hold
the ejector, Z pin, shoulder bolts,and give space to ejector leader pin and support pillar.

8. Ejector Plate: The function of ejector plate is to pushes the ejector pins and
return pins, connected with ejector rods.

9. Movable Clamping Plate or Bottom plate: The function of bottom plate is
to holds the movable side of the mold like spacer block, support plate, cavity
plate and ejector mechanism to the movable platen of the injection machine.

Basic Mould Construction