Precision injection molding, in a strict sense, refers to the dimensional accuracy of plastic products produced by injection molding machine equipment, which can reach below 0.01mm, usually an injection molding production method with a size between 0.01 and 0.001mm. Precision injection molding is mainly used in aerospace, auto parts, precision instruments, sports equipment, testing tools and other industrial and civil products.
Influencing factors
(1) Consider the shrinkage rate of the plastic.
(2) Product shape and size Shape and size of plastic parts.
(3) Precision of mold plastic parts.
(4) Mold machining accuracy.
(5) The injection molding machine has high precision requirements for the products.
Technical focus
Clamping force: In the process of precision injection molding, high injection pressure is generally required, otherwise it is difficult to mold. [2]
Measurement accuracy: To maintain high stability of plastic products, the hot melt plastic injected into the cavity must be equal each time.
Injection speed: Injection speed is an important indicator of precision injection molding machines.
Injection pressure: Precision injection requires a large injection pressure to improve the compactness of plastic parts, reduce shrinkage and deformation, and ensure the accuracy of parts.
Holding pressure: holding pressure has a great influence on precision plastic parts.
Mold temperature: The temperature change of the cavity surface should be controlled within ±1°C.
