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Device for casting tire molding die, and method for casting tire molding die

A tire molding and mold technology, which is applied to casting molding equipment, cores, casting molds, etc., can solve problems such as air bubbles being easily involved in molten metal, casting defects, etc., to shorten casting time, improve casting quality, and suppress bubble defects Effect

Active Publication Date: 2020-07-24
BRIDGESTONE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] However, compared with the low-pressure casting method, the gravity casting method tends to cause air bubbles to be involved in the molten metal during pouring, and casting defects caused by air bubbles tend to occur.

Method used

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  • Device for casting tire molding die, and method for casting tire molding die
  • Device for casting tire molding die, and method for casting tire molding die
  • Device for casting tire molding die, and method for casting tire molding die

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Embodiment Construction

[0067] Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0068] figure 1 It is an overall perspective view of a casting device 1 to which a mold for tire molding according to an embodiment of the present invention is applied, figure 2 yes figure 1 The vertical cross-sectional view of the casting device 1 viewed from the arrow II-II.

[0069] The casting device 1 of the mold for tire molding is a casting device of a gravity casting method in which a molten metal is poured by gravity using a casting jig to pour the molten metal into a casting space.

[0070] Therefore, this casting device 1 does not require a large-scale device like a casting device of a low-pressure casting method, and equipment investment and manufacturing costs are kept low, and it is also possible to cast large-sized tire molding dies.

[0071] In addition, this casting apparatus 1 is an apparatus which performs casting using the plaster casting which...

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PUM

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Abstract

This device for casting a tire molding die includes a platen (2), and an outer tube molding flask (40) which is installed on the platen (2) and inside which a casting space (50) is formed, wherein atleast one radial groove (3) extending in a radial direction centered at a central axis (Lc) is formed in an upper surface of the platen (2). A radially outer side groove end portion (3a) of the radialgroove (3) is provided with a groove inlet sprue (7i) which is located further to the radially outer side than the outer tube molding flask (40), is connected to a pouring jig (60), and introduces molten metal into the radial groove (3), and a groove outlet sprue (7e) for tapping the molten metal from the radial groove (3) into the casting space (50) is provided in a radially inner side groove end portion (3b) of the radial groove (3). A feeder frame (30) is disposed above the casting space (50), and a feeder space (35) for accumulating a feeder head is formed directly above the groove outletsprue (7e) by means of the feeder frame (30). By means of this configuration, the occurrence of bubble defects during casting is suppressed, casting time is reduced, and casting quality is improved.

Description

technical field [0001] The present invention relates to a casting device and a casting method for casting a mold for tire molding by using a gravity casting method. Background technique [0002] In the case of casting molds for tire molding, when the molten metal is poured into the casting space formed in the mold, if air bubbles are involved in the molten metal and enter the casting space, the air bubbles will stick to the surface of the plaster mold, resulting in the casting product being damaged. Bubble defects occur. [0003] Among casting defects, bubble defects are the most likely to occur. [0004] There is a low-pressure casting method as an effective casting method for dealing with such bubble defects (for example, refer to Patent Document 1). [0005] The low-pressure casting method disclosed in Patent Document 1 is a method in which the inside of the holding furnace is pressurized by blowing compressed gas into the molten metal stored in the closed holding furna...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C9/28B22C9/08B22D25/02
CPCB22C9/08B22C9/28B22D25/02
Inventor 石原泰之
Owner BRIDGESTONE CORP