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Heat-insulating riser bush for casting

A technology for thermal insulation riser sleeves and casting molds, applied in the field of metallurgical casting, can solve problems such as affecting the internal quality of castings, and achieve the effects of improving temperature, pore size, grain boundary shape and distribution, and high degree of bonding

Inactive Publication Date: 2018-08-10
霍山县东胜铸造材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Some people have found that the actual effective feeding of common sand risers accounts for a small proportion of the total volume of the riser, about 6-14%. Therefore, larger risers are often used to meet the feeding of castings. Even so, the riser The liquid metal in the mouth itself solidifies quickly, and sometimes it cannot be fed in time to affect the internal quality of the casting

Method used

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  • Heat-insulating riser bush for casting
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  • Heat-insulating riser bush for casting

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The present invention proposes a casting thermal insulation riser sleeve, which is used for feeding into the casting mold A, and includes a base body 1, a heating layer 2 and a protective layer 3, a feeding cavity is opened inside the base body 1, and a feeding cavity is opened at the bottom of the base body 1 A feeding outlet, the feeding cavity communicates with the inside of the casting mold A through the feeding outlet, and the radial cross-sectional area of ​​the end of the feeding outlet away from the feeding cavity is smaller than that of the feeding outlet near the The radial cross-sectional area of ​​one end of the feeding cavity; the heating layer 2 is arranged on the inner wall of the feeding cavity, and the protective layer 3 is coated on the outside of the substrate 1; one end of the heating layer 2 is flush with the bottom of the substrate 1, and the other end of the heating layer 2 One end is located in the middle of the base body 1 .

[0020] Substrate 1...

Embodiment 2

[0023] The present invention proposes a casting thermal insulation riser sleeve, which is used for feeding into the casting mold A, and includes a base body 1, a heating layer 2 and a protective layer 3, a feeding cavity is opened inside the base body 1, and a feeding cavity is opened at the bottom of the base body 1 A feeding outlet, the feeding cavity communicates with the inside of the casting mold A through the feeding outlet, and the radial cross-sectional area of ​​the end of the feeding outlet away from the feeding cavity is smaller than that of the feeding outlet near the The radial cross-sectional area of ​​one end of the feeding cavity; the heating layer 2 is arranged on the inner wall of the feeding cavity, and the protective layer 3 is coated on the outside of the substrate 1; one end of the heating layer 2 is flush with the bottom of the substrate 1, and the other end of the heating layer 2 One end is located in the middle of the base body 1 .

[0024] The base bo...

Embodiment 3

[0027] The present invention proposes a casting thermal insulation riser sleeve, which is used for feeding into the casting mold A, and includes a base body 1, a heating layer 2 and a protective layer 3, a feeding cavity is opened inside the base body 1, and a feeding cavity is opened at the bottom of the base body 1 A feeding outlet, the feeding cavity communicates with the inside of the casting mold A through the feeding outlet, and the radial cross-sectional area of ​​the end of the feeding outlet away from the feeding cavity is smaller than that of the feeding outlet near the The radial cross-sectional area of ​​one end of the feeding cavity; the heating layer 2 is arranged on the inner wall of the feeding cavity, and the protective layer 3 is coated on the outside of the substrate 1; one end of the heating layer 2 is flush with the bottom of the substrate 1, and the other end of the heating layer 2 One end is located in the middle of the base body 1 .

[0028] Substrate 1...

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Abstract

The invention discloses a heat-insulating riser bush for casting. The heat-insulating riser bush for casting is used for feeding in a casting mold. The heat-insulating riser bush for casting comprisesa base body, a heating layer and a protective layer. A feeding cavity is formed in the base body. A feeding outlet is formed in the bottom of the base body. The feeding cavity communicates with the interior of the casting mold through the feeding outlet. The radial sectional area of the end, away from the feeding cavity, of the feeding outlet is smaller than the radial sectional area of the end,close to the feeding cavity, of the feeding outlet. The heating layer is arranged on the inner wall of the feeding cavity. The base body is wrapped with the protective layer. The base body is made from a heat-insulating material. The heat-insulating material comprises, by weight, 40-50 parts of heat-insulating vermiculite, 10-20 parts of expanded perlite, 20-30 parts of hollow micro-beads, 8-16 parts of silica powder, 20-30 parts of graphite powder, 10-18 parts of boraxes, 10-18 parts of steel slag powder, 8-16 parts of tailing sand, and 10-20 parts of bentonite.

Description

technical field [0001] The invention relates to the technical field of metallurgical casting, in particular to a casting insulation riser sleeve. Background technique [0002] The riser is a supplementary part added to the top or side of the casting to avoid defects in the casting. The cavity of the riser is a cavity for storing liquid metal. When the casting is formed, the metal is supplied to prevent shrinkage, shrinkage, and exhaust. and the role of slag collection. Riser sleeves with different functions have different shapes, sizes and opening positions. The traditional riser feeding technology for steel castings uses ordinary sand risers, which are directly formed by molds. Due to the lack of insulation materials, the risers dissipate a lot of heat from the inside to the outside during the feeding process, resulting in their own solidification from the outside to the inside. process. Some people have found that the actual effective feeding of common sand risers accou...

Claims

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Application Information

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IPC IPC(8): B22C9/08B22D27/06B22C1/00
CPCB22C9/088B22C1/00B22D27/06
Inventor 卢世东叶纯华
Owner 霍山县东胜铸造材料有限公司
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