Tag - injection molding grade

Facing Insufficient and Uneven Hardness of Mould, What Should We Do?

Hardness of mould heat treatment is a very important mechanical property index, and unqualified hardness is a very serious defect. Insufficient hardness or uneven hardness after heat treatment will reduce the wear resistance and fatigue strength of the mould, lead to early failure of the mould, and seriously reduce the service life of the mould.


1) The cross-section of the mould is large and the hardenability of the steel is poor. For example, the steel with low hardenability is selected […]

Protection and Maintenanceof Mould

Protection of mould
Because of the specificity, precision and vulnerability of mould, the safety protection of mould is very important. The following aspects are summarized as a whole:
mold making
Anti-rust: Prevent rusting caused by leakage/condensation/rain/fingerprints of injection moulds.
Anti-collision: Prevent the phenomenon of the mould crash caused by the breakage of the ejector pin and the failure of the ejector pin to fall back into place.
De-burring: Prevent the burr of mould caused by cloth/material punching/hand-wiping/nozzle clamp/knife touching.
Defects: Prevent the damage caused by the lack of parts […]

Properties of mold need to be validated before manufactured

First point: wear resistance
When the billet is plastic denatured in the mold cavity, it moves and slides along the outer surface of the mold cavity, which causes severe conflict between the outer surface of the mold cavity and the blank, and then leads to the failure of the mold due to wear and tear. So the wear resistance of materials is one of the most basic and important functions of the mold.

Hardness is the primary factor affecting wear resistance. Generally speaking, the […]

Factors Influencing Polishing Effect of Moulds

There are three main factors affecting the polishing effect of moulds:

Quality of mould steel

Non-uniform surface hardness or different characteristics often lead to polishing difficulties, and all kinds of inclusions and pore in steel are not conducive to polishing.

Heat treatment process

Heat treatment affects polishing performance in many ways. The fine structure of surface hardened steel is not conducive to polishing due to the increase of carbon content on the surface. Polishing is difficult because of the increase of small oxide […]

What Industries Are Molds Widely Used In

Mold, industrial production used for injection, blow molding, extrusion, die casting or forging, forming, smelting, stamping and other methods to obtain the required products of various molds and tools. In short, the mold is a tool used to make molding objects. This tool is composed of various parts, and different molds are composed of different parts. It mainly realizes the processing of the shape of the object by changing the physical state of the molding material. It is known […]

Brief Analysis of Performance Requirements of Steel for Plastic Injection Mould

According to the forming method, plastics can be divided into thermoplastics and thermosetting plastics. Thermosetting plastics, such as bakelite powder, are permanently formed by pressing under heating and pressure. Bakelite moulds are periodically subjected to pressure and continuously heated at 150-200 degrees. Thermoplastics, such as polyvinyl chloride, are usually formed by injection moulding. Plastics are heated in a separate heating chamber and then injected into colder moulding chambers in a softening state to exert pressure, thus bringing about cold […]

Cautions In Using Release Agent

In the plastic mold manufacturing industry, in order to facilitate demolding, improve efficiency, prolong the life of plastic molds, make the surface of products smooth, qualified size and reduce waste products, demoulding agents are usually needed. The release agent can be roughly divided into internal release agent and external release agent.

The internal release agent is a kind of material added into the molding material. During the vulcanization process, it migrates to the surface of the product, thus playing a […]