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A kind of sand mold multi-stage flexible extrusion forming method

A technology of extrusion forming and sand molding, which is applied in the field of multi-stage flexible extrusion molding of sand molds and can solve problems such as easy bending and deformation

Active Publication Date: 2022-05-17
BEIJING NAT INNOVATION INST OF LIGHTWEIGHT LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the forming process of resin sand molds for casting, a near-formed sand mold with precise contours can be further obtained by extrusion, which saves time for the subsequent net shape cutting process, and can solve the problem of easy bending and deformation during the lifting and extrusion process of a single small contact

Method used

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  • A kind of sand mold multi-stage flexible extrusion forming method
  • A kind of sand mold multi-stage flexible extrusion forming method
  • A kind of sand mold multi-stage flexible extrusion forming method

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Embodiment Construction

[0025] Below in conjunction with the attached in the example of the present invention figure 1 , 2 , 3, 4, the implementation process of a sand mold multi-stage flexible extrusion forming method of the present invention is described in detail. This specific implementation case takes the third-level contact as an example. The cross-section of the regular body for discrete processing is a square, and the ratio of the number of first-level contacts, second-level contacts, and third-level contacts is 1:4:16.

[0026] The following descriptions are only the basic steps and embodiment parameters of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention can have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

[0027] 1. On the ...

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Abstract

The invention belongs to the intersection field of casting and rapid prototyping, and discloses a sand mold multi-stage flexible extrusion forming method. In the forming process of resin sand molds for casting, the method adopts multi-level contacts to approach the mold cavity, and can obtain near-formed sand molds or patterns with higher approximate contours, which reduces the volume of near-formed sand molds, thereby saving casting sand. Reduced net shape time for subsequent cuts. This method first lifts the primary contact 1 for cavity approximation, and then lifts the secondary contact 2 for supplementary filling, which not only improves the approximation accuracy of the cavity 3, but also solves the problem of easy bending and deformation when a single small contact is lifted and lowered ; When producing a single piece of small batch casting sand mold, it can significantly improve the sand mold forming efficiency.

Description

technical field [0001] The invention belongs to the intersecting field of casting and rapid prototyping, and in particular relates to a sand mold multi-stage flexible extrusion forming method. Background technique [0002] Casting is a kind of metal thermal processing technology mastered by human beings earlier, with a long history. The traditional sand casting process is complex, and the design and processing of molds such as patterns and core boxes is a complex and time-consuming process with multiple links. With the development of science and technology, casting technology and casting efficiency have been greatly improved. The moldless digital precision forming technology integrates CAD technology, casting technology, numerical control technology, cutting technology, etc. In casting production, no mold is needed, and various casting sand molds are produced by processing sand billets. Great advantage in production. [0003] Nowadays, economic globalization is intensifyi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22C9/02
CPCB22C9/02
Inventor 单忠德姜二彪战丽宋亚星顾兆现
Owner BEIJING NAT INNOVATION INST OF LIGHTWEIGHT LTD
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