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Heat-preservation heating riser

A technology of heating riser and riser, which is applied in the field of riser to achieve the effects of not being easy to deform, ensuring integrity and enhancing heating intensity

Pending Publication Date: 2018-05-11
刘思彤
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to provide a thermal insulation heating riser to solve the technical problem of how to ensure the heating intensity while buffering the extrusion of molding sand in the prior art

Method used

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  • Heat-preservation heating riser

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Embodiment Construction

[0029] In order to make the object, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Apparently, the described embodiments are only some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other implementations obtained by persons of ordinary skill in the art without making creative efforts fall within the protection scope of the present invention.

[0030] The present invention provides a thermal insulation and heating riser, which is installed on the positioning pin 101 on the surface of the casting 10 at the isolated heat joint. It includes a thermal insulation layer 1 and a plastic and disappearing foam riser 2 that disappears after burning. The thermal insulation and heating layer 1 is compositely arranged around the riser 2 of the lost foam. The lost foam riser 2 protrudes upwards from the heat-insula...

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Abstract

The invention provides a heat-preservation heating riser and relates to the technical field of risers, aiming at solving the technical problems of how to ensure the heating intensity and buffer squeezing of molding sand at the same time. The heat-preservation heating riser is mounted on a positioning pin on the surface of a casting at an isolated hot spot, and is characterized by comprising a heat-preservation heating layer and an evanescent mode riser which has plasticity and is combusted to disappear; the heat-preservation heating layer is arranged around the evanescent mode riser in a compounding manner; the evanescent mode riser upward stretches out of the heat-preservation heating layer and covers the upper surface of the heat-preservation heating layer; a positioning hole is formed in the lower part of the evanescent mode riser; the positioning pin is partially inserted into the positioning hole and is in interference fit with the positioning hole; a gap is formed between the lower surface of the evanescent mode riser and the surface of the casting.

Description

technical field [0001] The invention relates to the technical field of risers, in particular to a thermal insulation and heating riser. Background technique [0002] In the casting process, due to the uneven thickness of the casting structure, the casting often has isolated hot joints, which will cause shrinkage cavities or shrinkage defects in the hot joints of the final casting, which will affect the use of the casting and even cause the casting to be scrapped. The most effective way to solve the defects of isolated pyrolysis castings in the technology is to place a riser at the hot joint, and use the riser to replenish the shrinkage of the molten metal during the solidification process at the hot joint. [0003] For the isolated heat joint, the traditional riser cannot feed the heat joint because the modulus of the feeding channel is smaller than the modulus of the heat joint. Point-feeding of isolated thermal nodes through spouts or exothermic risers. For manual moldin...

Claims

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Application Information

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IPC IPC(8): B22C9/08B22D27/06B22C9/04
CPCB22C9/046B22C9/088B22D27/06
Inventor 刘思彤
Owner 刘思彤
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