
Molds made of plastic, as the main components of injection molding, assist in the correct formation of finished or semi-finished plastics and plastic products in their molten state. Higher precision plastic molds are made of a series of subassemblies, each component of which directly serves to affect the quality of the final product and the efficiency of production.
1. Moving Platen
The moving platen is a part of the mold attached to the injection mechanism, it carries the concave mold, and this moves during the injection procedures to open and shut the mold.
2. Fixed Platen
Moving Platen is mobile, carries the concave mold assembly only, and together with the fixed platen it brings into completion the operations of mold closing and opening.
3. Cavity Block
A cavity block is one of the major core parts of a mold and is traditionally known as the matching mate of a convex block to form a closed cavity to give the desirable outer shape of a plastic product.
4. Convex mold also named Core pin or Core
The convex die is located into a concave die to create internal features and end product holes, such as center shafts, threads, or other complicated geometry.
5. Guide Post and Guide Sleeve
The guide post and Drill Guide Sleeve are used to align the two halves of the mold when the mold is closed, so it won’t deflect and the alignment is precise as when the mold is being formed.
6. Ejector Pins
Ejector pins throw out the product from the cavity after the mold is open and the product clings to the mold, ejector pins are provided with a spring or hydraulic cylinder to operate.
7. Temperature Control System
They comprise cooling channels that control the temperature of the mold which in turn controls components such as the flow of plastics, rate of curing, and quality of the end product as well as heating devices that heat the mold.
8. Locking Wedge
Offers extra clamping force when overcoming the pressure needed to open the mold apart particularly when handling large or extensive molds.
9. Side Action
Applied in making side frames including sliders and tilt pins which are retractable during the mold opening process to ease removal of the product.
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