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No-mold casting method for preventing sand bonding and prefabricated part

A technology of moldless casting and prefabricated parts, which is applied in the direction of casting molding equipment, casting molds, and casting mold components. Concession, the effect of increasing the casting speed

Inactive Publication Date: 2015-08-05
鞍山千钢机械制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing way of placing special sand such as zircon sand or chromite sand is traditional manual stacking. This method makes it difficult to control the amount, position and strength of special sand, resulting in waste of cost

Method used

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  • No-mold casting method for preventing sand bonding and prefabricated part
  • No-mold casting method for preventing sand bonding and prefabricated part
  • No-mold casting method for preventing sand bonding and prefabricated part

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Example 1: See Figure 7 As shown, point A of the moldless sand mold is a place where sand is easy to stick during the casting process. The method in the present invention can be used to solve the problem of sticking sand at point A. The specific method steps are as follows:

[0041] 1) See figure 2 , image 3 , Is the universal standard preform sand corner preform block 1 and sand prismatic preform block 2, which are finished preforms made in advance. The selected standard prefabricated parts have the same specifications and models as the sand-shaped corner prefabricated block 1 and the sand-shaped prismatic prefabricated block 2.

[0042] 2) See Figure 4 , When processing the moldless sand mold 4, at the installation position of the preform, according to the specifications and dimensions of the sand corner block 1 and the sand prismatic block 2, the sand prismatic bonding surface 3 and the sand corner are bonded. Face 5.

[0043] 3) After the moldless sand mold 4 is finis...

Embodiment 2

[0045] Example 2, when the casting has special quality requirements for a certain plane, it can be made in advance such as Figure 5 or Figure 8 The prefabricated block of sand surface body shown. Then process the moldless sand mold. When processing the sand mold, reserve the installation position of the sand mold surface body prefabricated block. Finally, the prefabricated block of sand surface body is glued to the sand mold, such as Image 6 , Picture 10 Shown.

Embodiment 3

[0046] Example 3, see Picture 10 When the casting has a circular ring structure, the sand mold is first processed according to the shape of the casting, and the paste position of the prefabricated block is reserved, and then the arc-shaped edge prefabricated block 9 is spliced ​​and pasted on the corresponding position of the sand mold. If the arc surface of the casting has special quality requirements, splice and paste the annular structure sand surface body precast block 7 on the corresponding position of the sand mold.

[0047] When splicing all standard preforms, the joints are required to be tight and no molten iron can penetrate during casting.

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Abstract

The invention discloses a no-mold casting method for preventing sand bonding and a prefabricated part. The method comprises the following steps: (1) the prefabricated part is manufactured; (2) a no-mold sand mold is formed; and when the sand mold is processed, the mounting position of the prefabricated part is left in the easy sand bonding place in a molding cavity of a casting sand box of the no-mold sand mold and in the plane place having specific requirement on the casting quality through judging according to the casting structure; and (3) the prefabricated part is fixed in the left position of the sand mold through bonding; and the sand mold is prefabricated and molded. Compared with the prior art, the method has the following beneficial effects: the special prefabricated part is manufactured beforehand, and is fixed in the left position of the casting mold for realizing such special process targets as reduction of casting sand bonding and wrapping, improvement of local deformability, improvement of local collapsibility and local temperature control. The method can improve the casting quality and reduce the production cost. The method is convenient and simple in operation, and can manufacture the prefabricated parts to standard prefabricated parts with unified specification for cutting and splicing.

Description

Technical field [0001] The present invention relates to the technical field of casting, and in particular to a method for preventing sand sticking by moldless casting and a preform. Background technique [0002] When manufacturing thick-section castings or large-scale castings, ordinary molding sand is not enough to withstand the high temperature action of metal oxides, resulting in frequent defects such as sand-packing and sand-sticking on the surface of the component. In this case, the commonly used measure is to adopt the local sand mold High-grade refractories such as zircon sand or chromite sand. The existing method of placing special sand such as zircon sand or chromite sand is traditional manual stacking. This method makes it difficult to control the amount, position, and strength of special sand, resulting in waste of cost. Summary of the invention [0003] The purpose of the present invention is to provide a method and preforms for preventing sand sticking in moldless ca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C9/02
CPCB22C9/02
Inventor 鲍壮鲍猛李迎昀朱杰
Owner 鞍山千钢机械制造有限公司
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