Structural composition of injection mold


1. Molded parts The part that imparts the shape, struct […]

1. Molded parts
The part that imparts the shape, structure, and size of the molding material is usually composed of a core (protrusion), a concave mold cavity, a threaded core, an insert, and the like.
2, pouring system
It is the passage that directs molten plastic from the nozzle of the injection machine to the closed cavity, usually consisting of a main flow path, a split flow path, a gate, and a cold well.
3. Guide parts
In order to ensure that the movable part and the guiding part which can be precisely aligned when the fixed mold is closed, the guiding and positioning function is adopted, which is composed of the guiding column and the guiding sleeve, and some molds are also provided with guiding parts on the ejection board to ensure The demolding mechanism moves smoothly and reliably.
4, demoulding mechanism
The device for demoulding the plastic parts and the pouring system has many structural forms. The most commonly used demoulding mechanisms such as ejector pins, top pipes, top plates and pneumatic ejections are generally provided by ejector pins, reset bars, slingshots, and ejector pins. , top plate (top ring) and top plate guide column / guide sleeve and other components.
5, core pulling mechanism
For plastic parts with side holes or undercuts, it is necessary to perform lateral core pulling or splitting of the slider (lateral splitting) before being demolded to release the mold smoothly.
6, mold temperature regulation system
In order to meet the mold temperature requirements of the injection molding process, it is necessary to have a mold temperature adjustment system (such as: cooling water, hot water, hot oil, electric heating system, etc.) to adjust the mold temperature.
7, exhaust system
In order to smoothly discharge the gas in the cavity, a venting groove is often formed at the mold parting surface, and the gap between the push rods of other molds or other moving parts (such as a slider) can also function as a venting.
8, other structural parts
Refers to parts that are set to meet the requirements of the mold structure (such as: fixed plate, moving / fixed template, struts, support plates and connecting screws, etc.).