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Sand core rod pre-tightening device

A core bone and sand core technology, applied in the field of metallurgical casting, can solve problems such as defects, uneven inner walls or holes of castings, and scrapping, and achieve the effect of enhancing the rigidity of the core bone and the rigidity of the sand core.

Active Publication Date: 2013-03-20
SHANGHAI BAOSTEEL CASTING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the current casting production, slender castings or slender holes are often bent due to insufficient rigidity of the sand core core bone during casting, and the inner wall of the casting or the hole is not straight, resulting in defects or scrapping

Method used

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  • Sand core rod pre-tightening device

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Effect test

Embodiment Construction

[0021] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0022] see figure 1 , The present invention provides a pre-tightening device for sand core core, which is mainly composed of a shaft 1, a coupling 6, two bearing plates 3, 5, a pre-tightening compression spring 4 and a nut 2.

[0023] A coupler 6 is arranged at one end of the shaft 1, and the coupler 6 is connected with the mandrel. Install two opposite force bearing plates 3,5 on the shaft 1, and pre-tightening compression spring 4 is set between the two force bearing plates 3,5.

[0024] At the other end of the shaft 1 and on the outside of one of the bearing plates 3, a nut 2 is screwed, so that the deformation of the pre-tightening compression spring 4 produces a pre-tightening force, and another bearing plate 5 leans against the outside of the sand box.

[0025] The pre-tightened compression spring 4 is provided with an insulating material 8 on...

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Abstract

The invention relates to a sand core rod pre-tightening device which comprises a shaft, a coupling, two load-bearing plates, a pre-tightening pressure spring and a nut, wherein the coupling is arranged at one end of the shaft, the coupling is connected with a core rod, the two load-bearing plates are arranged on the shaft and face each other, the pre-tightening pressure spring is arranged betweenthe two load-bearing plates, the nut is arranged at the other end of the shaft and positioned on the outer side of either load-bearing plate to allow the pre-tightening pressure spring to generate a pre-tightening force, and the other load-bearing plate leans against the outer surface of a sand box. The sand core rod pre-tightening device provided by the invention is applied to slim and long castproducts or sand core rods with slim and long holes. Different pre-tightening forces are generated by adjusting the degree of deformation of the pressure spring and continuously applied to a sand core rod, so as to continuously increase the rigidity of the sand core rod during the use process.

Description

technical field [0001] The invention relates to the metallurgical casting industry, in particular to a sand core bone pretensioning device. Background technique [0002] In the current foundry production, slender castings or slender holes are often bent due to insufficient rigidity of the sand core core bone during casting, and the inner wall of the casting or the hole is not straight, resulting in defects or scrapping. [0003] How to improve this situation and seek a kind of sand core core bone pretensioning device has become the goal pursued by those skilled in the art. Contents of the invention [0004] The task of the present invention is to provide a sand core core pre-tightening device, which solves the problems existing in the above-mentioned prior art. The purpose of enhancing the rigidity of the core bone of the sand core. [0005] Technical solution of the present invention is as follows: [0006] A pre-tightening device for sand core bone, including: a shaft...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22C9/10
Inventor 王以春
Owner SHANGHAI BAOSTEEL CASTING
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