Die gas cap structure

If the required molding cycle is shorter than 10s, or there is a vacuum between the molded product and the mold.

Types of gas caps: Generally, the minimum diameter of gas caps can be 5mm, the maximum diameter can be 30mm, and the maximum height can be 50 mm. Gas caps are generally composed of four parts: shell, ejector pin, spring and elastic cylindrical pin.

The exhaust gas will smoothly discharge all the gas in the injection mold from the mold. When the exhaust is poor, the gas in the cavity will be compressed to generate a large back pressure, thus preventing the plastic melt from filling normally and quickly, and at the same time preventing the gas from compressing the cavity.

The heat generated will cause the plastic to burn. When the filling speed is fast, the temperature is high, the viscosity of the material is low, the injection pressure is high, and the thickness of the injection part is too large, the gas will penetrate into the plastic part under a certain degree of compression, resulting in defects such as blowholes. Loose structure.

Extended data:

The air tip should be used in the state that the plastic parts do not penetrate the wall, and the strength of ejecting the plastic parts is uniform, which solves many problems of ejecting the plastic parts by other ejection structures, shortens the mold manufacturing cycle, saves the mold materials and reduces the cost.

Usage: press

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