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Lost foam-shell mold casting vibration and solidification method based on foam mold

A foamed plastic and shell casting technology, applied in casting molding equipment, casting molds, cores, etc., can solve the problems of large grain size of lost foam shell castings, and achieve excellent internal quality, refined grain size, The effect of high dimensional accuracy

Inactive Publication Date: 2012-10-24
WUHAN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides a vibratory solidification method for lost foam shell casting based on a foam plastic mold, which solves the problem of coarse grain size of lost foam shell castings and aims at refining the grain size of lost foam shell castings and improving the performance of castings Methods

Method used

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  • Lost foam-shell mold casting vibration and solidification method based on foam mold

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Vibration Solidification of Lost Pattern Shell Mold Casting of AZ91D Magnesium Alloy

[0019] (1) Prepare the foam plastic pattern, soak the foam mold with paint, then sprinkle sand, repeat the above operation twice after drying, and form 2 layers of ceramic shells on the surface of the foam mold;

[0020] (2) After losing the foam plastic mold and firing, the ceramic shell 6 is put into the bottom-drawing sand box 4, and the bottom-drawing sand box is connected with the vibrating table through fixing screws 2, and then filled with loose powder into the bottom-drawing sand box. Dry pearl sand 5, after loose dry sand is vibrated and compacted by the vibrating table 1, close the vibrating table, cover the upper part of the sand box with a layer of plastic film 9, and then place the sprue cup on the upper part of the sand box to be poured;

[0021] (3) Turn on the vacuum device and the vibrating table. The vacuum device implements vacuuming through the vacuum port 8 and th...

Embodiment 2

[0023] Vibration Solidification of A356 Aluminum Alloy Lost Form Shell Mold Casting

[0024] (1) Prepare the foam plastic pattern, soak the foam mold with paint, then sprinkle sand, repeat the above operation twice after drying, and form 2 layers of ceramic shells on the surface of the foam mold;

[0025] (2) Ceramic mold shell 6 is put into the bottom-drawing sand box 4 after losing the shape of foam plastic and roasted. The bottom-drawing sand box is connected with the vibrating table through fixing screws 2, and then the bottom-drawing sand box is filled with pearls. Sand 5. After the loose dry sand is vibrated and compacted by the vibrating table 1, the vibrating table is closed, and the upper part of the sand box is covered with a layer of plastic film 9, and then the sprue cup is placed on the upper part of the sand box to be poured;

[0026] (3) Turn on the vacuum device and the vibrating table, and the vacuum device implements vacuuming through the vacuum port 8 and th...

Embodiment 3

[0028] Vibration Solidification of Gray Iron Lost Form Shell Mold Casting

[0029] (1) Prepare the foam plastic pattern, soak the foam mold with paint, then sprinkle sand, repeat the above operation 3 times after drying, and form 3 layers of ceramic shells on the surface of the foam mold;

[0030] (2) After the ceramic mold shell 6 loses the shape of the foam plastic and is roasted, it is put into the bottom-drawing sand box 4, and the bottom-drawing sand box is connected with the vibrating table through the fixing screw 2, and then filled with loose powder into the bottom-drawing sand box. Dry pearl sand 5, after loose dry sand is vibrated and compacted by the vibrating table 1, close the vibrating table, cover the upper part of the sand box with a layer of plastic film 9, and then place the sprue cup on the upper part of the sand box to be poured;

[0031] (3) Turn on the vacuum device and the vibrating table. The vacuum device is vacuumed through the vacuum port 8 and the s...

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Abstract

The invention relates to a lost foam-shell mold casting vibration and solidification method based on a foam mold, comprising the following steps of: (1) manufacturing the foam mold with a ceramic shell on a surface thereof; (2) after the foam mold is subjected to lost foam mold and baking, putting the foam mold into a bottom-drawing sandbox, filling scattered molded dry sand into the bottom-drying sandbox, closing a vibrating table after vibrating and compacting the scattered dry sand pass through the vibrating table, coating a layer of plastic film on the upper part of the bottom-drawing sandbox, and placing a pouring cup on the upper part of the bottom-drawing sandbox to be poured; and (3) opening a vacuum device and the vibrating table, injecting metal liquid into a ceramic shell through the pouring cup, vibrating and solidifying, closing the vibrating table and the vacuum device after the metal liquid is solidified into a cast completely, and opening the sandbox to perform cleaning. The lost foam-shell mold casting vibration and solidification method based on the foam mold is simple, lower in cost, convenient to operate and environmental-friendly. An effective method with the characteristics of convenience, quickness, low cost, environmental-friendly grain size of refined casts and enhanced performances of the casts is provided for lost foam-shell mold casting enterprises.

Description

technical field [0001] The invention relates to the field of precision casting, in particular to a vibration solidification method for lost pattern shell casting based on a foam plastic mold. Background technique [0002] Lost foam casting is a new technology with nearly no allowance and precise forming. It is called "new casting technology in the 21st century" and "green engineering in casting". It has been greatly developed and widely used at present. However, there are also certain problems in lost foam casting. For example, the decomposition of the foamed plastic pattern used in the pouring process will bring many defects such as pores, wrinkles, inclusions, and carburization. The grains are coarse, and the performance of the casting is low, especially for the lost foam casting of aluminum and magnesium alloys. [0003] Lost foam shell casting is a new composite casting process developed by combining lost foam casting and investment casting. After taking off the foam m...

Claims

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Application Information

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IPC IPC(8): B22C9/04B22D27/08
Inventor 蒋文明樊自田吴和保董选普
Owner WUHAN INSTITUTE OF TECHNOLOGY
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