Vacuumizing mechanism for mould

Abstract

The invention discloses a vacuumizing mechanism for a mould. The vacuumizing mechanism comprises a base, an air exhaustion insert, an air exhaustion valve needle, an air outlet insert and an air exhaustion valve needle driving device, wherein the air exhaustion insert, the air exhaustion valve needle and the air outlet insert are all arranged in the base; an air outlet channel is arranged in the air outlet insert; a hollow part is arranged inside the air exhaustion insert; one end of the hollow part of the air exhaustion insert is communicated with the air outlet channel in the air outlet insert; the air exhaustion valve needle penetrates through the air outlet channel of the air outlet insert and is arranged in the hollow part of the air exhaustion insert; an outer protruding ring of which a radial direction is toward the outside is arranged at the outer circumference of the air exhaustion valve needle; an inner protruding ring of which a radial direction is toward the inside is arranged on the inner wall of the air exhaustion insert; and the inner protruding ring is opposite to the outer protruding ring. The vacuumizing mechanism for the mould at least has the advantages that the problem of air trapping in a mould chamber can be solved, so that the maintenance period of the mould is in normal time, the maintenance cost is greatly reduced, the quality of the injection molding product is more stable, and the product almost has no defective products.

Description

technical field [0001] The invention relates to a mold vacuuming mechanism used in injection molds with complex product shapes and high appearance requirements. Background technique [0002] In the traditional product production process, we can only rely on the way of directly processing exhaust grooves on mold parts to improve the appearance and size of products caused by trapped air. Due to the structural limitations of trapped air, it is impossible to solve some key and key positions. Air trapping problem; and during the production process of the mold, the pyrolysis of the plastic will produce a grease-containing mist that adheres to the position of the exhaust groove, resulting in poor exhaust, resulting in high frequency of mold maintenance, high maintenance costs, and poor product quality in the production process. Unstable and high defect rate issues. Contents of the invention [0003] In order to solve the defects of the above-mentioned technologies, the present i...

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Problems solved by technology

[0002] In the traditional product production process, we can only rely on the way of directly processing exhaust grooves on mold parts to improve the appearance and size of products caused by trapped air. Due to the structural limitations of trapped air, it is impossible to solve some key and key positions. Air trapping problem; and during the production process of the mold, the pyrolysis of the plastic will produce a grease-containing mist that adheres to the position of the exhaust groove, resulting in poor exhaust, resulting in high frequency of mold maintenance, high maintenance costs, and poor product quality in the production process. Unstable and high defect rate

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