What is the important role of Stool Mould exhaust

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      If the Stool Mould design does not consider the exhaust setting, the gas accumulated in the Stool Mould will cause the following hazards.

      1. Increase the filling resistance, resulting in unclear edges and corners of the product surface

      2. High internal stress is generated inside the product, and obvious flow marks, gas marks, and weld marks will appear on the surface, which will reduce the performance of plastic parts, produce bubbles, unqualified injection, weak welding, peeling, and other surface defects such as loose and uniform surface quality.

      3. Due to the compression of gas during injection molding, instantaneous high temperature is generated in the cavity, which causes the melt to decompose and change color, and even causes spots such as local carbonization and scorching.

      4. Due to poor exhaust, the filling speed is reduced and the molding cycle is prolonged. If the injection pressure is increased, the flash will occur locally, resulting in trapped air.

      Resistance is generated, resulting in loosening of the tissue and loss of strength. Proper venting can increase the injection speed and make the filling and holding pressure reach a good state.

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