Optimum Injection Speed The optimum injection speed allows us to maintain minimum injection pressure under given conditions. Injection speed should vary with cavity thickness. Compared with the thick ones, the thin ones possess a smaller effective flow cross-section. As a result, we need to raise injection speed, improve overall deformation rate and increase frictional […]
Holding Pressure Setting (1) The Significance of Pressure Holding/Pack After the mold cavity is filled, holding pressure is applied to compensate for resin shrinkage caused by cooling. Appropriate holding pressure and holding time will be maintained to push the mold screw, to continue injecting molten resin into the cavity. Holding pressure has a great […]
Injection Pressure Injection pressure refers to the force that helps molten resin overcomes the resistance to flow. When the mold screw reaches changeover to holding pressure, the pressure on screw front end is referred to as injection pressure. Fill the entire cavity with a pressure lower than the max. injection pressure of the injection molding […]
1.The runner type 2.Series diameter(mm)：2 2.5 3 3.5 4 4.5 5 6 7 8 （10 12 for reference） 3.How to design the runner diameter for different material For PE,PA .etc. we can choose smaller diameter,but for PC,PMMA,we choose bigger diameter. 4. Helpful Tips: (1). For a U-shaped runner, the size of the runner can be […]
Functions of the prings: As one of the widely used elastic parts in molds, the springs are mainly used for the purposes of unloading, material pressing, pushing and ejecting. Based on different loading capacities, springs are marked with five different colors to make it easier to distinguish and select them. The mold spring series Spring […]
In plastic injection molding, The sprue bushing is a metal part that links the mold with the injection machine. The sprue can also be described as a part of the runner, which allows the molten plastic material to be injected into the mold through the nozzle of an injection machine.Bolt-type sprue bush is a sprue […]
The Purpose of The Injection Mold Cooling System The design purpose of the cooling system is to ensure uniform cooling, as well as the shortest possible ejection time of the molded products, so as to complete the production process. Cooling design has a direct influence on product quality and molding cycle. Cooling Location […]
Due to the special requirements of some products, the mold release of some part is not consistent with the mold opening direction of the injection machine, which needs the side parting core pulling mechanism to eject the product smoothly. The side parting core pulling mechanism comes with two types: slider(also known as slide) and lifter. […]
O-ring is a typical extruded seal, of which the main sealing design elements are the compression ratio and elongation of its cross section diameter, since they are of great significance to sealing performance as well as service life. The outstanding sealing effect of O ring largely depends on the accurate matching between the dimensions and […]
Ejector Block 1) Direct ejection can be in 2 styles: ejector and ejecting block + ejector pin. 2) The ejector is designed with gradients on its four sides: 1°on the side that clings to the product and 3° on the other three sides. 3) When the core of plastic injection mold is integrated, the distance […]