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Casting device

a casting device and casting technology, applied in the field of casting devices, can solve the problems of cold shutting, flow mark and cold shutting in the molded object, and the quality of the molded object is deteriorated, so as to prevent splashing and improve the quality of the produ

Inactive Publication Date: 2016-02-18
UBE MASCH CORP LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention relates to a method for improving the quality of products made from molten metal. The method involves filling the cavity with the molten metal while pressurizing the inside of the cavity and maintaining the pressure while the metal reaches the opening. This prevents the metal from splashing and improves the quality of the product.

Problems solved by technology

Therefore, the molten metal may be splashed at the moment of opening the gate piston pin due to the pressure difference, thereby causing a flow mark and cold shut in a molded object.
In other words, there may be a problem in which quality of the molded object is deteriorated.

Method used

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Examples

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Embodiment Construction

[0016]In the following, an embodiment of a casting device will be described in detail with reference to the attached drawings.

[0017]FIG. 1 is a schematic view illustrating the casting device according to an embodiment. The casting device includes a pressurizing chamber (crucible) 10 to pressurize molten metal A as illustrated in FIG. 1. Inside the pressurizing chamber 10, a container 11 to keep the molten metal A is provided. An upper end opening of the pressurizing chamber 10 is closed with a stationary platen 12, and a sealed space is formed inside the pressurizing chamber 10. The sealed space (pressurizing chamber 10) is in communication with a gas supply passage 13 and a gas discharge passage 14. The gas supply passage 13 is connected to the pressurizing source 16 via a valve 15, and supplies an inert gas into the pressurizing chamber 10. The gas discharge passage 14 opens the pressurizing chamber 10 to atmosphere via a valve 17.

[0018]An upper end of a cylindrical stalk 18 is fi...

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Abstract

A casting device includes: dies formed with a cavity including an opening at a lower portion; a pressurizing chamber disposed below the dies and containing molten metal and further formed with a sealed space above the molten metal; a cylindrically-shaped stalk having an upper end opening communicating with the opening of the cavity and a lower end opening immersed into the molten metal contained inside the pressurizing chamber; a pressurizing means configured to supply a gas to the sealed space of the pressurizing chamber to pressurize the inside of the pressurizing chamber; a depressurizing means configured to discharge a gas from the cavity to depressurize the inside of the cavity; and a control device. The control device, when the molten metal is provided to the cavity from the pressurizing chamber, pressurizes the inside of the pressurizing chamber by the pressurizing means until the molten metal reaches the opening of the cavity and depressurizes the inside of the cavity by the depressurizing means while continuing pressurizing the inside of the pressurizing chamber after the molten metal reaches the opening of the cavity.

Description

TECHNICAL FIELD [0001]The present invention relates to a casting device.BACKGROUND ART [0002]In the related art, there is a known casting device in which an aluminum composite product such as an aluminum wheel is manufactured by low-pressure die casting or low medium pressure die casting. According to this type of casting device, pressure inside a pressurizing chamber is increased by pressurizing in a state that molten metal is contained inside the pressurizing chamber (crucible), and further pressure inside of a cavity of a die is decreased by vacuum drawing. The molten metal is filled inside the cavity from the pressurizing chamber via a stalk by a pressure difference between the mentioned pressurizing and vacuum drawing (Patent Literature 1).[0003]However, according to the casting device disclosed in Patent Literature 1, a gate piston pin is opened after making a molten metal side to positive pressure and a cavity side to negative pressure. Therefore, the molten metal may be spla...

Claims

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Application Information

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IPC IPC(8): B22D18/04B22D18/08
CPCB22D18/08B22D18/04B22D18/06B22C9/067B22D17/145B22D18/02
Inventor SASAKI, HIROTOMIYOSHI, HIROAKIAKEMOTO, HARUO
Owner UBE MASCH CORP LTD