Lift tube in low pressure casting

A low-pressure casting and riser technology, applied in the field of die casting machines, can solve the problems of metal splash, riser damage, metal riser influence, etc., achieve good load-bearing capacity and wear resistance, improve casting quality, prevent effect of chemical reactions

A low-pressure casting and riser technology, applied in the field of die casting machines, can solve the problems of metal splash, riser damage, metal riser influence, etc., achieve good load-bearing capacity and wear resistance, improve casting quality, prevent effect of chemical reactions

CN103100695AInactive Publication Date: 2013-05-15陈新华
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  • Lift tube in low pressure casting

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[0017] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, so as to define the protection scope of the present invention more clearly.

[0018] see figure 1 , the embodiment of the present invention includes:

[0019] A low-pressure casting liquid riser, comprising an outer pipe 1 and an inner pipe 2 arranged concentrically, a silicon carbide film 3 is arranged on the inner wall of the inner pipe 2, and a fixed connection with the riser is provided at the inlet of the riser. The damper 4 has several small holes 5 uniformly arranged on the side of the damper 4 .

[0020] The outer pipe 1 is a refractory cement pipe, the inner pipe 2 is a metal pipe, and the metal pipe is one of stainless steel pipe, iron pipe or steel pipe. When entering the high-temperature aluminum water, since...

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Abstract

The invention discloses a lift tube in low pressure casting. The lift tube in the low pressure casting comprises an outer tube and an inner tube, wherein the outer tube and the inner tube are concentrically arranged, a silicon carbide thin film is arranged on the inner wall of the inner tube, a damper which is fixedly connected with the lift tube is arranged at the inlet position of the lift tube, and a plurality of small holes are evenly formed in the side face of the damper. According to the lift tube in the low pressure casting, metal splashing in pouring and impact agitation of remained metal at the bottom of a crucible are reduced, inclusion defects are gradually overcome, casting quality is obviously improved, meanwhile the lift tube has expected intensity, good bearing ability and abrasion resistance due to the fact that structure of concentrically arrangement of a metal tube and a non-metal tube is adopted, and moreover unexpected chemical reaction between the metal tube and molten metal is effectively prevented from happening due to the fact that the silicon carbide thin film and a fire-resistant cement tube can well prevent the molten metal from being immersed into the metal tube.

Description

technical field [0001] The invention relates to the field of die-casting machines, in particular to a low-pressure casting liquid riser. Background technique [0002] Low-pressure casting is a method of filling the cavity with liquid metal under lower pressure to form a casting. The process is to pass dry compressed air into a sealed container. Under the action of gas pressure, the liquid metal Rising along the riser pipe, it enters the mold cavity smoothly through the gate, and maintains the gas pressure on the liquid surface in the crucible; after the casting is completely solidified, the gas pressure on the liquid surface is released, so that the unsolidified liquid metal in the riser pipe Reflux the crucible and remove the casting. [0003] Due to the relatively stable liquid metal filling in low-pressure casting, good casting formability, clear outline, smooth surface, compact structure, high mechanical properties, high process yield, good working conditions, and easy ...

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Application Information

Patent Timeline
15 May 2013
Publication
CN103100695A
IPC
B22D18/04
Inventors
陈新华