Pressure casting mold

Abstract

The invention discloses a pressure casting mold. The pressure casting mold comprises a mold body, an inner cavity is formed in the mold body, a boss used for pressure casting forming of a product hole position and a bridge cavity allowing liquid allow to flow through the boss to form a product bridge are formed in the inner wall of the mold body, and the bridge cavity is communicated with the inner cavity; according to the pressure casting mold, through arrangement of the bridge cavity, after the liquid alloy flows to the boss, the liquid alloy can continuously flow into the bridge cavity, a product machined through the mold forms the bridge at the position of the boss, a numerical control machine tool is adopted to remove the bridge of the product, the hole position needed by the product can be obtained, and the bridge cavity is arranged to effectively relieve erosion of the liquid alloy to the mold body; meanwhile, the bridge cavity is additionally formed in the position of the boss to serve as buffering, filling performance of the liquid alloy nearby a boss accessory is good, and the product yield is high.

Description

technical field [0001] The invention relates to the field of die-casting molds, in particular to a die-casting mold. Background technique [0002] In the die-casting process of magnesium-aluminum alloy, due to the fast injection flow rate of magnesium-aluminum alloy in the mold, when it flows to a structure with a small size, the filling speed of the liquid alloy is slow. For example, when processing a magnesium-aluminum alloy notebook case, Mold in the prior art, the structure and size of its inner cavity are identical with the structure and size of product, yet, as figure 1 As shown, because the hole position 1 of the notebook case, such as the exhaust hole, has a small area, the structure at the exhaust hole is not smooth, and this position is easy to cause cold material, cracking or lack of material, and the defect rate is very high. [0003] In addition, due to the fast flow of magnesium-aluminum alloy liquid in the mold, the alloy liquid at the position of the vent ho...

AI Technical Summary

Problems solved by technology

[0002] In the die-casting process of magnesium-aluminum alloy, due to the fast injection flow rate of magnesium-aluminum alloy in the mold, when it flows to a structure with a small size, the filling speed of the liquid alloy is slow. For example, when processing a magnesium-aluminum alloy notebook case, Mold in the prior art, the structure and size of its inner cavity are identical with the structure and size of product, yet, as figure 1 As shown, because the hole position 1 of the notebook case, such as the exhaust hole, has a small area, and the structure at the exhaust hole is not smooth, this position is easy to cause cold material, cracking or lack of material, and the defect rate is very high

[0003] In addition, due to the fast flow of magnesium-aluminum alloy liquid in the mold, the alloy liquid at the position of the vent hole has a very strong impact on the mold, which is easy to cause mold erosion, especially for the sharp corner of the mold.

[0004] In the die-casting molding method in the prior art, when processing the hole 1 of the above-mentioned type of exhaust hole position, or other hole 1 with a smaller area, the direct forming method is adopted, resulting in a low die-casting yield of the product, And the mold is easy to be eroded poorly, and the product processing cost is high

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