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A cylindrical insulating riser base

A thermal insulation riser and cylindrical technology, which is applied in the direction of casting molding equipment, casting molds, cores, etc., can solve the problems of easy-cut sheet thickness limitation, limited process yield, and lack of heat insulation effect, etc., to reduce material Cost, good heat insulation effect, effect of improving refractoriness and heat insulation effect

Inactive Publication Date: 2009-10-07
谢锦荣
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the existing easy-cut sheets do not have the effect of heat insulation. In order to prevent the molten metal from solidifying at the neck hole, the thickness of the easy-cut sheet is greatly limited, and the process yield that can be improved is relatively limited.

Method used

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  • A cylindrical insulating riser base
  • A cylindrical insulating riser base

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Embodiment 1

[0030] Such as figure 1 , figure 2 The base of a cylindrical thermal insulation riser shown is in the shape of a tapered sleeve with an inner conical surface 33 as a whole, the upper opening 32 of the inner conical surface 33 matches the bottom of the cylindrical thermal insulation riser, and the lower opening 32 of the inner conical surface 33 The radius of the opening 31 is less than the radius of the upper opening 32; the cone angle of the inner conical surface 33 is 90°, and the radius of the upper opening 32 of the inner conical surface 33 is twice the radius of the lower opening 31; it is an equal wall thickness structure.

[0031] The base is made as follows:

[0032] 30 kg of paper slag from waste paper, 40 kg of slag cotton, 40 kg of cornstarch, and coarse quartz powder or quartz stone with a fineness of 600-900 mesh are produced by water method and screened through a 600-mesh screen. 600-700 kg of quartz waste powder, according to the above proportions. Add appro...

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Abstract

The invention discloses a cylindrical insulating riser base, wherein, the integral body is a taper sleeve shape with inner taper cone surface, the upper shed of the inner taper cone surface is matched with the bottom of the cylindrical insulating riser, and the radius of the lower shed of the inner taper cone surface is smaller than the radius of the upper shed. The cylindrical insulating riser base includes components as follows: 84%-87% of quartz powder, 3.5%-4.5% of paper slag, 4.5%-6% of slag wool, and 4.5%-6% of starch. The technical program has heat insulation effect, and can greatly improve the process production rate.

Description

technical field [0001] The invention belongs to the field of casting, in particular to a base of a cylindrical thermal insulation riser used in the casting process. Background technique [0002] In the casting process, after the molten metal is poured into the mold, due to cooling and solidification, it changes from liquid to solid, resulting in volume shrinkage. When volume shrinkage cannot be replenished by molten metal, shrinkage cavities and porosity will occur in parts with larger modulus in the casting after solidification. For those casting alloys with large volume shrinkage, this defect often occurs. Shrinkage cavity and shrinkage porosity will reduce the compactness of castings, reduce the effective cross-sectional area of ​​castings, and greatly reduce the mechanical properties. Therefore, it is necessary to control solidification and prevent defects. The use of risers is currently the most effective and popular process measure to control solidification and compe...

Claims

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Application Information

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IPC IPC(8): B22C9/08B22C1/26
Inventor 谢锦荣
Owner 谢锦荣
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