What Are The Structural Components Of The Injection Mold?
1. Formed parts
The parts that give shape, structure and size to the forming materials are usually composed of core (punch), cavity of concave mold, thread core, insert, etc.
2. Gating system
It is the channel that leads the molten plastic from the injector nozzle to the closed mold cavity. It is usually composed of the main runner, the splitter, the gate and the cold charging well.
3. Guide components
In order to ensure the accurate alignment of the moving die and the fixed die when they are closed, the guide component is set to guide and position. It is composed of guide pillar and guide sleeve. Some molds are also set with guide components on the ejector plate to ensure the smooth and reliable movement of the demoulding mechanism.
plastic injection mold
4. Demoulding mechanism
Devices for demoulding plastic parts and gating systems have many structural forms. The most commonly used demoulding mechanisms are ejector rod, pipe jacking, roof and pneumatic ejection, which are generally composed of ejector rod, reset rod, slingshot, ejector rod fixing plate, roof (top ring) and roof guide post/sleeve.
5. Core pulling mechanism
For plastic parts with side holes or side recesses, lateral core pulling or sliding block separation (lateral parting) must be carried out before ejection.
6. Mold temperature regulating system
In order to meet the requirements of the injection molding process on the mold temperature, a mold temperature regulating system (such as cooling water, hot water, hot oil and electric heating system) is required to regulate the mold temperature.
7. Exhaust system
In order to discharge the gas in the mold cavity smoothly, an exhaust slot is often set at the parting surface of the mold. The clearance between the push rod or other moving parts (such as the slider) of many molds can also play the role of exhaust.
8. Other structural parts
Parts set to meet the requirements of mold structure (such as fixed plate, movable/fixed template, stay head, support plate and connecting screws).
