1. Formed parts
The parts that give the shape, structure, and size of the molding material are usually composed of a core (punch), a concave cavity, a threaded core, and an insert.
2. Pouring system
It is the channel that guides the molten plastic from the nozzle of the injection machine to the closed mold cavity, and usually consists of a main channel, a runner, a gate and a cold slug well.
3. Guide parts
In order to ensure that the movable mold and the fixed mold can be accurately aligned when they are closed, the guide parts are used for guiding and positioning. It is composed of guide posts and guide sleeves. Some molds are also equipped with guide parts on the ejector plate to ensure The demoulding mechanism moves smoothly and reliably.
4. Demoulding mechanism
The device to realize the demoulding of plastic parts and pouring systems has many structural forms, the most commonly used ones are ejector pins, ejector tubes, top plates and air-returning demoulding mechanisms, generally composed of ejector pins, reset levers, slingshots, and ejector pin fixing plates , top plate (top ring) and top plate guide post/guide sleeve, etc.
5. Core pulling mechanism
For plastic parts with side holes or undercuts, before being ejected from the mold, it is necessary to pull the core sideways or separate the sliders (side parting) in order to be able to demould smoothly.
6. Mold temperature adjustment system
In order to meet the mold temperature requirements of the injection molding process, a mold temperature adjustment system (such as: cooling water, hot water, hot oil and electric heating system, etc.) is required to adjust the mold temperature.
7. Exhaust system
In order to discharge the gas in the mold cavity smoothly, exhaust grooves are often provided at the parting surface of the mold, and the gaps between push rods or other moving parts (such as sliders) of many molds can also play a role in exhausting.
8. Other structural parts
Refers to the parts set up to meet the structural requirements of the mold (such as: fixed plate, movable/fixed formwork, support head, support plate and connecting screws, etc.).