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Investment casting method

A technology of investment casting and investment casting, which is applied in the direction of casting molding equipment, molds, mold components, etc., and can solve problems such as high cost, complicated materials, and long production cycle

Inactive Publication Date: 2009-02-11
湖北省丹江口丹传汽车传动轴有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] In order to solve the problems of complex traditional investment casting shell making process, long production cycle, complicated materials, high cost and environmental pollution, the present invention proposes an investment casting shell making process technology

Method used

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Embodiment Construction

[0014] Design and manufacture the mold according to the part drawing, inject the prepared mold material (paste) with a certain temperature (paraffin, stearic acid) into the mold cavity through a certain equipment, and mold the mold material after cooling in the mold cavity. Take out the required part model, weld the wax model on the wax casting rod with a soldering iron to form a wax model group; prepare the slurry according to the process requirements, and evenly coat the outer surface of the wax model group with a layer of slurry; then apply the paint The surface of the module is uniformly sprinkled with a layer of sand particles of a certain specification; the module after sanding is soaked in the hardening solution in the pool to soak and harden; after a certain period of hardening in the pool, the module is hung on a shelf for water-controlled air-drying; finally Put the module into the pre-heated water to melt the wax mold in the shell; the above steps are repeated 3 time...

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Abstract

The invention provides an investment casting method which is completed by three working procedures of die making, shell making and formwork roasting and casting, wherein, the procedures of shell making include the following steps: firstly, doping; secondly, spreading the sand; thirdly, hardening; fourthly, air drying; and fifthly, de-waxing; the first four steps are carried out for 3 times in a cycling way and reach the making of a three-layer formwork; the last layer is only coated with materials, without sand-spreading, thus manufacturing a 3.5-layer formwork; then a tunnel kiln resistance furnace is adopted to roast the formwork so as to improve the production efficiency; the formwork is used after being cooled and a sand box is used for burying the cooled formwork into the sand box; the cooled formwork is filled with sand, compacted and then cast; sand used for compaction is recycled after being treated by a sand processing system. The formwork layer is manufactured to be thin by using the technical proposal and uses fewer materials, which can shorten working hours of procedures and reduce the production cost, and simultaneously, ensure the quality of casting pieces and save resources.

Description

technical field [0001] The present invention relates to a method of investment casting. Background technique [0002] The traditional investment casting production process mainly includes three processes: mold making, shell making and mold shell roasting and pouring. The coating module is formed in the secondary cycle process, and then the dewaxing (wax melting mold) is performed to form the mold shell, and the cavity in the shell is the part model. The main process is as follows: [0003] 1. Prepare the slurry according to the process requirements, and evenly coat the outer surface of the wax module with a layer of slurry called coating. [0004] 2. Evenly sprinkle a layer of sand with certain specifications on the surface of the coating module, which is called sanding. [0005] 3. Soak the hardening solution in the module pool after sanding and hardening (the hardening solution in the pool is prepared in advance) is called hardening. [0006] 4. After entering the pool...

Claims

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Application Information

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IPC IPC(8): B22C9/04B22C9/12
Inventor 肖江陈建喜张均周衡冯声奎李剑王家忠魏正茂
Owner 湖北省丹江口丹传汽车传动轴有限公司
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