Die casting apparatus and die casting method

Patent metadata

Field	Value
Publication number	US-9718123-B2
Application number	US-201414915827-A
Country	US
Kind code	B2
Filing date	Jul 24, 2014
Priority date	Sep 3, 2013
Publication date	Aug 1, 2017
Grant date	Aug 1, 2017

Abstract

Provided are a die casting method and a die casting apparatus for preventing molten metal from being unexpectedly supplied into a sleeve under decompression. Molten metal supply control for pumping up molten metal with an electromagnetic pump and supplying the molten metal into a sleeve in a state of decompressing a cavity of a die and the inside of the sleeve attached to the die, including: moving the surface of the molten metal, with the electromagnetic pump, from a standard position to the side opposite to a supply direction of the molten metal; decompressing the cavity and the inside of the sleeve; and weakening force of the electromagnetic pump, which pumps down the molten metal to the side opposite to the supply direction to supply the molten metal into the sleeve.

First claim

The invention claimed is:

1. A die casting method for pumping up molten metal with an electromagnetic pump and supplying the molten metal into a sleeve in a state of decompressing a cavity of a die and the inside of the sleeve attached to the die, comprising:
moving the surface of the molten metal, with the electromagnetic pump, from a standard position to the side opposite to a supply direction of the molten metal;
decompressing the cavity and the inside of the sleeve; preparing a pipe connecting the electromagnetic pump to the sleeve; disposing flow rate detectors detecting a flow of the molten metal on the parts of the pipe at a side of the electromagnetic pump and at a side of the sleeve; and
weakening force of the electromagnetic pump, which pumps pumping down the molten metal to the side opposite to the supply direction to supply the molten metal into the sleeve.

2. The die casting method according to claim 1 , further comprising:
controlling the supply of the molten metal into the sleeve with the electromagnetic pump based on the condition detected by the flow rate detectors.

3. A die casting apparatus including a die, a sleeve attached to the die, a decompressor decompressing a cavity and the inside of the sleeve, and an electromagnetic pump pumping up the molten metal, and supplying the molten metal into the sleeve in a state decompressing the cavity of the die and the inside of the sleeve, comprising:
a pipe connecting the electromagnetic pump to the sleeve;
flow rate detectors detecting the molten metal, which are disposed on the parts of the pipe at a side of the electromagnetic pump and at a side of the sleeve; and
a controller controlling the supply of the molten metal into the sleeve with the electromagnetic pump, based on the condition detected by the flow rate detectors.

Assignees

• Toyota Motor Co Ltd

Inventors

• Kikuchi Makoto

Classifications

• B22D17/145

  Venting means therefor (for permanent moulds B22C9/067) · CPC title

• B22D17/2046 Primary

  with provisions for damping the pressure peak · CPC title

• B22D17/30 Primary

  Accessories for supplying molten metal, e.g. in rations (supplying molten metal in ration in general B22D39/00) · CPC title

• B22D17/2023

  Nozzles or shot sleeves · CPC title

• B22D17/22

  Dies (manufacture, see the appropriate class, e.g. B23P15/24); Die plates; Die supports; Cooling equipment for dies; Accessories for loosening and ejecting castings from dies · CPC title