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Multi-element combined-type low-pressure pouring method and combined-type sand core

A pouring method and combined technology, applied in the direction of core, casting molding equipment, casting molds, etc., can solve the problems of not being able to meet the requirements of casting forming and quality, and improve the compactness, improve the filling ability, The effect of improving the pass rate

Active Publication Date: 2013-04-03
BEIJING HANGXING MACHINERY MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in large thin-walled complex castings, the traditional low-pressure casting process cannot well meet the requirements of casting forming and quality

Method used

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  • Multi-element combined-type low-pressure pouring method and combined-type sand core
  • Multi-element combined-type low-pressure pouring method and combined-type sand core
  • Multi-element combined-type low-pressure pouring method and combined-type sand core

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Embodiment Construction

[0030] The method of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0031] In this embodiment, the casting to be cast is a casting with an inner and outer two-layer skin structure, and the multi-component combined low-pressure pouring method includes the following steps:

[0032] A. Prepare a combined sand core composed of multiple sub-sand cores according to the structural shape of the casting;

[0033] Since the casting to be cast has an inner and outer skin structure, the main sand core can be divided into an inner sand core 1 and an outer sand core 2 according to this structure;

[0034] The gate sand core 3 is prepared, and the gate sand core 3 is provided with a main gate 31 , a runner 32 communicating with the main gate 31 , a rain runner 33 and a gap runner 34 communicating with the runner 32 .

[0035] The sprue sand core 3 is combined with the inner layer sand core 1 and the outer layer sand core 2 as a whole...

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Abstract

The invention discloses a multi-element combined-type low-pressure pouring method and a combined sand core. The method comprises the following steps of A, preparing the combined sand core which is formed by combining a plurality of branch sand cores according to the structural shape of a member to be poured; B, adopting the combined sand core to carry out the low-pressure pouring, wherein metal liquid for pouring enters a transverse pouring gate on the bottom of the combined sand core from a main pouring port of the combined sand core, partial metal liquid enters a plurality of sprues on a shower pouring gate from the transverse pouring gate, and then enters a die cavity, the shower pouring gate is arranged on the inner side of the combined sand core, and is used for pouring an inner skin of a casting; and the other part of the metal liquid enters a gap pouring gate from a gap pouring gate sprue which is arranged on the outer side of the transverse pouring gate and then enters a die cavity of an outer skin of the casting. The combined sand core comprises an inner sand core, an outer sand core and a sprue sand core, wherein the sprue sand core is provided with a main sprue, the transverse pouring gate, the shower pouring gate and the gap pouring gate sprue. Due to the adoption of the method and the sand core, the advantages of multiple pouring gates are integrated, the process is more reasonable, and the qualification rate of the casting is increased.

Description

technical field [0001] The invention belongs to the technical field of casting and relates to a multi-component combination low-pressure pouring method, which is suitable for resin sand casting of aluminum alloy, magnesium alloy and other non-ferrous metals with complex cylindrical structure castings with inner and outer skins. Background technique [0002] In recent years, with the rapid development of aviation, aerospace and other manufacturing industries, in order to reduce the structural weight, increase the overall rigidity and system reliability from the design point of view, many structural components have been integrally cast, and the requirements for castings have also become more precise and complex. , Large-scale development. Low-pressure casting is one of the best methods for casting large thin-walled aluminum alloys. It uses the air pressure in the crucible to fill the mold with molten metal from bottom to top, and keeps the sprue and the feeding channel integra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D18/04B22C9/10B22C9/08
Inventor 刘新超李智伟边毅孙建新
Owner BEIJING HANGXING MACHINERY MFG CO LTD
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