In the thicker parts of the plastic mold, such as ribs or protrusions, the shrinkage formed is more serious than the adjacent positions, because the cooling rate of the thicker area is much slower than that of the surrounding area....

Machining accuracy is the actual size, shape and position of the three geometric parameters of the surface of the parts after processing and the degree of conformity with the ideal geometric parameters required by the drawings. Machining accuracy is measured...

1. Parting surface, that is, the contact surface between the concave mold and the convex mold when the plastic mold is closed. The choice of its location and form is affected by factors such as product shape and appearance, wall...

The extrusion molding in the plastic mold is to make the plastic in a viscous flow state, under a high temperature and a certain pressure, pass through a die with a specific cross-sectional shape, and then form a continuous profile...

1: After the mold is used for a long time, the cutting edge must be sharpened. After grinding, the cutting edge surface must be demagnetized, and it must not be magnetic, otherwise it will be prone to blockage. 2: Springs...

Stress includes thermal stress and mechanical stress, which are mainly caused by mechanical, chemical, operational shock and heat. Explain several aspects after stress generation. In the process of die casting production 1. A cooling temperature control system should be set...

Selection of molding equipment for mold design according to the type of molding equipment must be familiar with the performance, specifications and characteristics of various molding equipment. For example, the injection mold should be installed on the injection machine and...

The standardization of plastic molds is constantly improving, the precision of molds is getting higher and higher, the production cycle is getting shorter and shorter, and the proportion of fitters is getting lower and lower, which ultimately promotes the continuous...

1. Mechanical polishing Mechanical polishing is a polishing method that obtains a smooth surface by cutting and plastic deformation of the material surface to remove the polished convex parts. Generally, whetstone strips, wool wheels, sandpaper, etc. are used. Use auxiliary...

First of all, each pair of molds should be equipped with a resume card to record and count the use, care (lubrication, cleaning, rust prevention) and damage in detail. Based on this, it can be found which parts and components...