1. Short injection Failure analysis and troubleshooting methods:(1) Improper control of process conditions. Should be adjusted appropriately.(2) Injection capacity of injection molding machine is less than weight of plastic part. A larger injection molding machine should be used.(3) Cross section of runner and gate is too small. Should be increased appropriately.(4) Flow distance of meltContinue reading “Common injection molding defects of polypropylene (PP)!”
Tag Archives: plastic injection mould
Seven systems of plastic molds
It refers to part of runner before plastic enters cavity from nozzle, including main runner, cold slug well, runner, gate, pull pin, etc. Second system: temperature control system Temperature control system: In order to meet mold temperature requirements of injection process, a temperature control system is required to adjust temperature of mold. For injection moldsContinue reading “Seven systems of plastic molds”
Design of injection mould for guide vane of curtain bead automatic machine
When designing an injection mold, demolding method affects mold structure. Main manifestation is that selection of parting method needs to consider convenient demoulding of plastic part, simple mechanism and convenient processing of mold parts. When plastic part has multiple characteristics and demolding direction is different, if conventional sliding block, inclined push rod and other mechanismsContinue reading “Design of injection mould for guide vane of curtain bead automatic machine”
Mold replacement instructions
Section 1 Preparation before mold change According to production plan of workshop, make preparations before changing mold. 1. Put on a safety helmet, prepare mold removal tools such as rags, rust inhibitors, and wrenches; 2. Check mold to be installed: (1). According to layman’s size of mold, choose machine that can be installed (in general, machineContinue reading “Mold replacement instructions”
Parting surfaces principles
(1) General principle of parting surface selection Selection of parting surface is not only related to molding and demoulding of plastic part, but also involves mold structure and manufacturing cost. Therefore, it is necessary to pay attention to selection of parting surface. Generally speaking, there are three main general principles for selection of parting surfaces:1)Continue reading “Parting surfaces principles”
Key points of injection mold design for memory bottom shell + 3D
Product diagram of memory bottom case is shown in Figure 1. Maximum size of product is 170.75 mm * 121.20 mm * 38.6 mm, average thickness of plastic part is 3.2 mm, material of plastic part is ABS, shrinkage rate is 1.005, and weight of plastic part is 57.64 grams. Technical requirements for plastic parts are that there mustContinue reading “Key points of injection mold design for memory bottom shell + 3D”
Design analysis of injection mould for automobile headlight lamp shell
Car lights are mainly used for lighting, which can be said to be eyes of cars. Car lights are collective name for all car lighting systems. Automobile lamps have high appearance requirements. Several important parts are transparent parts, electroplated parts, etc. It can be said that the most demanding parts of automobile appearance are automobileContinue reading “Design analysis of injection mould for automobile headlight lamp shell”
How to improve transparency of plastic products
Because plastic has advantages of light weight, good toughness, easy molding, low cost, etc., so in modern industry and daily products, more and more plastics are used instead of glass, especially in optical instruments and packaging industries, development is particularly rapid. However, because it requires good transparency, high abrasion resistance, and good impact toughness, a lotContinue reading “How to improve transparency of plastic products”
7 points that must be considered in plastic injection molding
Setting of injection molding process should consider 7 factors such as shrinkage, fluidity, crystallinity, heat-sensitive plastics and easily hydrolyzed plastics, stress cracking and melt fracture, thermal performance and cooling rate, and moisture absorption. First. Shrinkage rate Form and calculation of thermoplastic molding shrinkage are as mentioned above, factors that affect thermoplastic molding shrinkage are asContinue reading “7 points that must be considered in plastic injection molding”
In-depth talk about warpage deformation of injection molded products
1. Warpage deformation It means that shape of injection molded product deviates from shape of mold cavity, which is one of common defects of plastic products. There are many reasons for warping and deformation, and it is often impossible to solve it by process parameters alone. Combining relevant information and actual work experience, following brieflyContinue reading “In-depth talk about warpage deformation of injection molded products”
PLASTIC MOULD MANUFACTURER 