Category: Technology
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Holding pressure in plastic injection molding
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…
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The runner of plastic injection mold
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…
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The spring for plastic injection mold
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…
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The sprue bushing of plastic injection mold
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…
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Injection mold Cooling System(water line) design
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…
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O-ring for water line in plastic injection mold?
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…
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How much does injection mold cost?
For dozens of years, to produce polymer parts, the team of product development has to be reliant on the plastic injection molding process, which is a proven, robust, repeatable and ideal process for the manufacturing of high volume products, but a product development team has to consider the injection mold cost when employing the injection…
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What are return pins?
The function of return pins Return pins’ functionis to push the ejecting plate back The Spec. of return pins Usually, when production automation is required for the plastic injection mold, a spring has to be installed under RP. See the following diagram: The spring type is TF. (Note: spring installation requirements: A. Spring preload is…
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What is guide pin for plastic injection mold?
Guide pin function: 1.Guide pin is for Accurately locate core and cavity side of plastic injection mold,make them match perfectly and move smoothly 2.Support the mold weight 3.Protect core or cavity inserts Material of guide pin: SUJ2 ,hardness:HRC 60+/-2 degree.(high-frequency quenching) The types and application of guide pin How to design the length of guide…
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Safe size for hoist ring of plastic injection mold
Name :Hoist ring or lifting eyebolt Application: used for assembly and transport of plastic injection mold Material:SUS, 20#,25# Finish: Chrome plated or black oxidation Brand: Crossby,YOKE,JDT https://youtu.be/rVBRZzbCDlc All copyright reserved by injection mold company Sositar Mould