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 […]
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 […]
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 […]
Since mankind entered the industrial society, the production of all kinds of products has got rid of manual work. Automated machine production has been popularized in all walks of life, and the production of plastic products is no exception. Nowadays, plastic products are processed by injection molds with injection molding machines, such as those common in our daily life. All kinds of household appliances and digital products are processed by injection molding. How is a complete plastic product poruduced in the […]
From three points, we can see the quality of injection parts.
First, look at the appearance
Seewhetherthe injection parts are complete and whether they are deformed or not;
Whether the injection parts are uniform in color, whether there is obvious color difference, and whether the color is bright and translucent.
Second, touch the product
Touch the the surface of the injection part to see whether smooth, and whether there are burrs around the handle;
Whether theinjection parts have been naturally aged, the aging is reflected in […]
The functional structure of plastic mould system is mainly composed of six systems: pouring system, temperature regulating system, forming parts system, exhaust system, guiding system and ejection system. The pouring system and forming parts are the parts directly contacted with plastics, and change with plastics and products. They are the most complex and most changeable parts in plastic mould. It is required to process the parts with the highest smoothness and accuracy.
The pouring system refers to the runner […]
1) plastic materials
The complexity of plastic material properties determines the complexity of injection moulding process. The performance of plastic materials varies greatly with varieties, brands, manufacturers and even batches. Different performance parameters may lead to completely different forming results.
2) injection temperature
The melt flows into the cooling cavity and loses heat due to heat conduction. At the same time, the heat generated by shearing may be more or less than the heat dissipated by heat conduction, mainly depending on the […]
Soft mold refers to the mold made of steel such as NAK80, which can be machined directly without heat treatment, and can be put into use directly after processing. This material is generally pre-hardened when used. Hard mold refers to the mold core material is annealed before mechanical processing, and then heat treatment after mechanical processing, generally hot. After treatment, electrical processing and remanufacturing are also needed.
The service life of hard mold is much longer than that of soft mold.
Soft mold is a simple mold made […]
Parting surface, that is, the contact surface between the die and the punch when the die is closed. The selection of its position and form is influenced by the shape and appearance of the product, wall thickness, forming method, post-processing technology, die type and structure, demoulding method and the structure of the forming machine.
2, structural parts, namely, complex mold slide, oblique top, straight top block. The design of structural parts is very critical, which relates to the life of […]
There are several ways to print or design the surface of plastic products.
1. Screen printing
This method is the most common and widely used one; it is generally suitable for flat or radian printing.
Principle of surface printing
Surface printing is to put the ink into the gravure with words or patterns carved, then copy the words or patterns onto the surface, then use the surface to transfer the words or patterns to the surface of the product, and finally solidify […]