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The plastic skin formed on the mold wall reduces the cross-sectional area of ​​the plastic flow, resulting in a pressure drop. There is a maximum limit to the pressure that can be obtained on the injection molding machine to push the screw at the set injection speed. The pressure required to push the screw forward […]

Do you know the 10 factors that affect the quality of injection molds? Mold manufacturing is a complex process, from design, processing, assembly, debugging and other steps to the final actual use. In the entire life cycle, the factors that affect the quality of the mold are mainly the following 10 aspects. Steel is the

Color difference is a common defect in injection molding. There are many factors affecting color difference, including raw material resin, masterbatch, mixing of masterbatch with raw material, injection molding process, injection molding machine, etc. In the actual production process, we generally control color difference from the following five aspects. Choose an injection molding machine with

As the plastic flows through the injection molding machine and different parts of the mold, there is a loss of pressure on the plastic flow front due to drag and friction. In addition, as the plastic contacts the mold wall, it begins to cool, increasing the viscosity of the plastic and requiring additional pressure to

1) Viscosity curve The purpose of making a viscosity curve is to select a suitable injection speed injection molding process . When there are slight fluctuations in various parameters, it will not cause a large change in melt viscosity. The fluctuation between each mold should be as small as possible to ensure the repeatability of

Do you know how to design a plastic part embedded in a nut If: there is no problem in the selection of plastic and nut, the standard state of the nut after being embedded in the plastic is shown in Figure (I)If: the nut size is too small, the plastic BOSS hole is too large,

Two-color injection molding technology is also called double-material injection molding technology. This is a technology that uses two plastic materials to be mixed and injection molded to form plastic products. Its technical connotation is actually to use a mold component to shape the shape and mold it in the mold. Welding work, so the basic

The role of hot runner in plastic mold design Hot runner (HRS) is also called a hot water nozzle, which turns a solidified nozzle into a molten nozzle. Its composition is relatively simple and mainly includes a manifold, a hot nozzle, a temperature controller, etc. Among them, the manifold can be divided into I-shaped, The

Appearance method:Appearance identification mainly observes the appearance characteristics of plastic products through vision, touch, smell, etc., such as the shape, transparency, color, gloss, hardness, etc. of the product. After plastics are recycled and reprocessed, the color, gloss, strength, etc. will change. The color of plastics without recycled materials will generally be more transparent, and products