Method for low-pressure casting thin-wall long-sized castings and equipment used by same

A low-pressure casting, long-size technology, applied in the field of low-pressure casting methods and the equipment used, can solve the problems of complex design of the mold gating system, poor exhaust, cold insulation joints, etc., so as to reduce labor intensity of workers and reduce pouring risers. , Good product forming effect

Active Publication Date: 2012-08-22
烟台路通精密科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a low-pressure casting method for thin-walled and long-sized castings and the equipment used therein, so as to overcome the lack of pouring, air holes, shrinkage, slag holes, and deformation caused by gravity casting in the prior art , cold barrier joint marks, poor exhaust, complex design of mold gating system and other problems

Method used

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  • Method for low-pressure casting thin-wall long-sized castings and equipment used by same
  • Method for low-pressure casting thin-wall long-sized castings and equipment used by same
  • Method for low-pressure casting thin-wall long-sized castings and equipment used by same

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Embodiment 1

[0034] The low-pressure casting method of thin-walled and long-sized castings of the present invention, the low-pressure casting method of thin-walled, long-sized castings, first melts the metal material, closes the furnace body, prepares the mold,

[0035] (1) Inspection equipment;

[0036] (2) Mold preheating: the upper mold is opened about 100mm, the heater is put into the mold cavity, and the ignition is preheated. The preheating temperature is 280-300 degrees, and the heating time is 1-1.5 hours;

[0037] (3) Adding aluminum to the holding furnace: add the dissolved metal liquid to the holding furnace;

[0038] (4) Sand core preparation: The sand core is installed on the core making machine, and the coated sand is used to fill the model with compressed air, and then heated and sintered.

[0039] (5) Set the process parameters, clean the mold cavity, put in the sand core, and close the mold;

[0040] (6) Injection: Low-pressure pouring is used to fill the mold, the pouri...

Embodiment 2

[0045] The low-pressure casting method of thin-walled and long-sized castings of the present invention, the low-pressure casting method of thin-walled, long-sized castings, first melts the metal material, closes the furnace body, prepares the mold,

[0046] (1) Inspection equipment;

[0047] (2) Mold preheating: the upper mold is opened about 100mm, the heater is put into the mold cavity, and the ignition is preheated. The preheating temperature is 280-300 degrees, and the heating time is 1-1.5 hours;

[0048] (3) Adding aluminum to the holding furnace: add the dissolved metal liquid to the holding furnace;

[0049] (4) Sand core preparation: The sand core is installed on the core making machine, and the coated sand is used to fill the model with compressed air, and then heated and sintered.

[0050] (5) Set the process parameters, clean the mold cavity, put in the sand core, and close the mold;

[0051] (6) Injection: Low-pressure pouring is used to fill the mold, the pouring...

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Abstract

The invention relates to a method for low-pressure casting thin-wall long-sized castings and equipment used by the same, wherein metal materials are firstly smelted, a furnace body is closed, a mould is prepared, dry compressed air is filled into an airtight container, under the action of gas pressure, liquid metal rises along a multitube and multi-sprue riser tube and stably enters a mould cavity through a sprue, and the gas pressure on the liquid level in a crucible is kept; and after the casting is completely solidified, the gas pressure on the liquid level is relieved to enable the unsolidified liquid metal in the riser tube to flow back into the crucible, and then the casting is taken out. The method for producing the thin-wall long-sized casting has the advantages that mold-filling is stable, a product is well molded, the mold-filling of liquid metal is carried out under the pressure, the liquid metal has good liquidity and is convenient to cast the thin-wall casting of the kind the casting is crystallized and solidified under the pressure and has a compact structure, so the mechanical property is improved, a pouring system is simple, casting heads are reduced, mechanization and automation are realized, the labor intensity of workers is reduced, a mould with multi-cavities is realized, the production efficiency is improved and the like.

Description

technical field [0001] The invention relates to a low-pressure casting method and equipment used therefor, in particular to a low-pressure casting method for thin-walled and long-sized castings and the equipment used therein. Background technique [0002] The current casting method of thin-walled and long-sized castings in foundries is gravity casting. Gravity casting refers to the process of injecting molten metal into the mold under the action of gravity of the earth. Gravity casting is prone to problems such as insufficient pouring, pores, shrinkage, slag holes, deformation, cold seal marks, poor exhaust, and complex design of the mold gating system. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a low-pressure casting method for thin-walled and long-sized castings and the equipment used therein, so as to overcome the lack of pouring, air holes, shrinkage, slag holes, and deformation caused by gravity casting...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D18/04
Inventor 陈国诗董鹏
Owner 烟台路通精密科技股份有限公司
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