Vacuum air-exhausting device of pressure-casting mould

Abstract

The invention discloses a vacuum air-exhausting device of a pressure-casting mould. The vacuum air-exhausting device is characterized by comprising a fixed mould air-exhausting block, and a movable mould air-exhausting block which are oppositely arranged in a clung mode, wherein an air-exhausting cavity is arranged between the fixed mould air-exhausting block and the movable mould air-exhausting block; one end of the fixed mould air-exhausting block is equipped with a vacuum interface; one end of the movable mould air-exhausting block is provided with an air suction hole; the air suction hole,the air-exhausting cavity and the vacuum interface are sequentially in communication to form an air-exhausting channel; the air-exhausting cavity extends in a wavy mode from the air suction hole to the vacuum interface; and a gap between the upper wall of the air-exhausting cavity and the lower wall of the air-exhausting cavity is gradually reduced in an extending direction. The vacuum air-exhausting device has the beneficial effects of being good in air-exhausting effect, not liable to have air hole blockage, easy to dismount and clear, great in air-exhausting area, and high in vacuum-pumping efficiency.

Description

technical field [0001] The invention relates to the field of die casting, in particular to a vacuum pumping device for a die casting mold. Background technique [0002] With the continuous development of die-casting technology, higher requirements are put forward for the mechanical properties of products, complex procedures, and the internal structure of castings. There is a lot of molten metal, which is more prone to air entrainment. Although there are exhaust settings in common die-casting molds, for die-casting parts with thicker walls, self-exhausting alone cannot fully discharge the gas in the cavity. In the existing die-casting molds, vacuum valves are installed on the die-casting molds in order to fully ventilate them. However, most of the vacuum valves have complex structures, difficult maintenance, and serial synchronization with the die-casting signals, making it difficult to operate on site, or It is often blocked, or the vacuum effect cannot be achieved. Conte...

AI Technical Summary

Problems solved by technology

[0002] With the continuous development of die-casting technology, higher requirements are put forward for the mechanical properties of products, complex procedures, and the internal structure of castings. There is a lot of molten metal, and it is easier to cause air entrainment. Although there are exhaust settings in common die-casting molds, for die-casting parts with thicker walls, self-exhausting alone cannot fully discharge the gas in the cavity.

In the existing die-casting molds, vacuum valves are installed on the die-casting molds in order to fully ventilate them. However, most of the vacuum valves have complex structures, difficult maintenance, and serial synchronization with the die-casting signals, making it difficult to operate on site, or It is often blocked, or the vacuum effect cannot be achieved

Images