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A shell preparation method for preventing bending deformation of directional test bar

A bending deformation and test rod technology is applied in the field of mold shell preparation to prevent bending deformation of directional test rods, and achieves the effects of saving the cost of pressing wax, preventing bending deformation, and enhancing anti-deformation and anti-shrinkage capabilities.

Active Publication Date: 2020-09-29
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to provide a shell preparation method for preventing the bending and deformation of directional test bars. Rod Size and Quality

Method used

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  • A shell preparation method for preventing bending deformation of directional test bar
  • A shell preparation method for preventing bending deformation of directional test bar
  • A shell preparation method for preventing bending deformation of directional test bar

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] The process of preparing the directional test rod ceramic shell in this embodiment is as follows:

[0064] 1. Wax rod preparation: place reinforcing ribs in the mold cavity before wax injection; the axial section of the reinforcing ribs is I-shaped, the length of the reinforcing ribs is 95% of the length of the directional test rod, and the end diameter of the reinforcing ribs is 95% of the diameter of the oriented test rod, such as image 3 shown. The rib material is the same as the wax mold.

[0065] Before wax pressing, immerse the reinforcing rib in liquid wax and then take it out. After cooling down to room temperature, the reinforcing rib is wrapped with a layer of wax film, such as Figure 4 ;Put the reinforcing rib wrapped in wax film into the mold cavity ( Figure 5 ), and then inject the wax into the mold cavity; no need to hold the pressure, take out the wax stick with reinforcing ribs, put it on the foam plane to cool naturally, and then assemble;

[006...

Embodiment 2

[0075] The difference from Example 1 is that when the wax mold is prepared, after the wax material is injected into the mold cavity, it is kept under pressure for 5 minutes, taken out, placed on a foam plane to cool naturally, and assembled. Other processes are all the same as in Example 1.

[0076] The orientation test rod prepared in this embodiment has no bending deformation.

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Abstract

The invention discloses a shell preparing method preventing bending deformation of a directional test rod and belongs to the technical field of ceramic shell preparing. The preparing technology includes four steps including wax rod pressing, shell preparing, shell dewaxing and roasting. In the wax rod pressing process, an anti-deformation strengthening rib is added in a wax pattern die, and therefore the deformation resisting capability and the contacting resisting capability of the test rod are improved, and deformation resisting and contracting resisting functions are also be achieved in thecombination process; and in the shell dewaxing process, the strengthening rib is removed from the bottom of a shell, and therefore the contraction resisting and deformation resisting purposes are achieved.

Description

technical field [0001] The invention relates to the technical field of ceramic mold shell preparation, in particular to a mold shell preparation method for preventing directional test rods from bending and deforming. Background technique [0002] Investment casting (also commonly referred to as "lost foam casting" or "precision casting") has a long history of application in production. This method is often used to produce products with high-quality surface quality, precise dimensions and complex shapes. Especially suitable for the production of products with complex and net-contour geometries, where machining is difficult and wasteful. The investment casting technique is also one of the oldest methods of manufacturing crafts. As technology advances, investment casting becomes one of the most advanced and versatile of the metal casting methods. The technological process of investment casting mainly includes: preparation of wax patterns, coating and hanging of refractory ma...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22C9/04B22C7/02
CPCB22C7/02B22C9/04
Inventor 郑伟申健卢玉章谢光徐正国楼琅洪张健
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI