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Lost pattern, method for producing lost pattern, and method for producing die using lost pattern

A manufacturing method and technology of metal molds, applied in the direction of manufacturing tools, forming tools, metal processing equipment, etc., can solve problems such as difficult operations, and achieve the effect of high shape accuracy and light weight

Inactive Publication Date: 2013-03-06
TOYOTA JIDOSHA KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to form a good sand mold, it is necessary to continue hard work for a long time

Method used

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  • Lost pattern, method for producing lost pattern, and method for producing die using lost pattern
  • Lost pattern, method for producing lost pattern, and method for producing die using lost pattern
  • Lost pattern, method for producing lost pattern, and method for producing die using lost pattern

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Embodiment Construction

[0042] figure 1 An exploded perspective view showing part of the vanishing model 2 partially formed of the three-dimensional mesh structure 6 . Although in figure 1 In the figure, it shows the situation after the blocks 4a and 4b are detached from the three-dimensional mesh structure 6, but actually the blocks 4a and 4b are fixed on the three-dimensional mesh structure 6, and the relative positional relationship between the blocks 4a and 4b is fixed by the three-dimensional mesh structure 6. Positional relationship.

[0043] The vanishing model 2 is a model produced by cutting a foamed styrene block. The vanishing model 2 can be cut out from the foamed styrene block by using a machine tool that rotates the end mill and adjusts the relative positional relationship between the workpiece and the end mill to a commanded positional relationship.

[0044] The three-dimensional mesh structure 6 is formed by a plurality of rod-shaped parts 6a, the ends of the rod-shaped parts 6a ar...

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Abstract

A light-weight die exhibiting necessary rigidity is obtained. First, an original pattern for a lost pattern is produced by cutting a lump of a quenchable material. The original pattern is provided with: a three-dimensional reticule structure which has a plurality of bar members, and in which the connecting points where the ends of the bar members are connected are dispersed within a three-dimensional space; and a plurality of block members, the relative positional relationship of which being secured by means of the reticule structure. Subsequently, at least a section of some of the bar members forming the original pattern is removed and is replaced with a tube member. Then, a full mold casting process is performed by using the lost pattern in which a section of some of the bar members are replaced with the tube members as mentioned above. The positional relationship between the block members on which the necessary molding surfaces of a die are formed is secured by means of the three-dimensional reticule structure, thereby ensuring necessary rigidity. The weight of the die is reduced because a three-dimensional reticule structure is used. Moreover, the amount of gas produced during the full mold casting process is reduced and the quality of the cast is not impaired because a section of some of the bar members are replaced with tube members.

Description

technical field [0001] The present invention relates to an evaporative pattern used in solid mold casting, a method for manufacturing the evaporative pattern, a method for manufacturing a metal mold using the evaporative pattern, and a cast product obtained by casting the evaporative pattern. Background technique [0002] As one method of manufacturing metal products, a full mold casting method is known. In the full mold casting method, a mold having the same shape as a metal product to be manufactured is prepared. The model is formed from a material that disappears if it comes into contact with molten metal. When this vanishing pattern is embedded in a sand mold and molten metal is injected into the sand mold, the pattern disappears and is replaced by molten metal. If the sand mold is broken after the molten metal is cooled, a cast product with the same shape as the mold is obtained. [0003] Although the solid mold casting method is an excellent method for producing met...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C9/04B21D37/02B21D37/20B22C7/02
CPCB22C7/023B22C9/04B22C9/02B22D25/02B22C7/02B22C9/046B22C9/108B22D19/00Y10T29/49826Y10T428/24
Inventor 末田洋丈龟山清竹本笃史度会达矢秋本仁山下正树
Owner TOYOTA JIDOSHA KK
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