Die casting device and molding method

Patent metadata

Field	Value
Publication number	US-2025050564-A1
Application number	US-202418645659-A
Country	US
Kind code	A1
Filing date	Apr 25, 2024
Priority date	Aug 9, 2023
Publication date	Feb 13, 2025
Grant date	—

Abstract

A cam mechanism allows a slide ejector plate and slide ejector pins to move relative to a slide core as the slide core moves. Alternatively, the cam mechanism allows the slide ejector plate and the slide ejector pins to move with the slide core. This eliminates the need for a dedicated hydraulic cylinder for moving the slide ejector plate and the slide ejector pins. The number of parts of the die casting device can thus be reduced.

First claim

What is claimed is:

1 . A die casting device, comprising:
a fixed mold that is a part of a mold; a movable mold that is another part of the mold, that is configured to be brought into contact with and separated from the fixed mold, and that together with the fixed mold forms a cavity when the movable mold is brought into contact with the fixed mold to allow a molded article to be formed in the cavity; a slide core that is provided on the movable mold, that is movable in a direction intersecting with a direction in which the movable mold is moved, and that together with the fixed mold and the movable mold forms the molded article; and a cam mechanism that allows an ejector member to move relative to the slide core as the slide core moves or that allows the ejector member to move with the slide core, the ejector member being configured to release the molded article from the slide core.

2 . The die casting device according to claim 1 , wherein the cam mechanism includes
a cam slot provided in the slide core, and a lock pin that is movable via a tracing portion inserted in the cam slot, that is engaged with the ejector member and is engageable with an engaged portion of the movable mold, and that allows the ejector member to move relative to the slide core when engaged with the engaged portion, and allows the ejector member to move with the slide core when disengaged from the engaged portion.

3 . A molding method using the die casting device according to claim 1 , the molding method comprising:
a mold clamping step of bringing the movable mold into contact with the fixed mold; a molding step of forming a molded article by filling the cavity with a molten material and cooling the molten material; a mold opening step of moving the movable mold and the slide core in a direction away from the fixed mold; a slide core releasing step of allowing the ejector member to move relative to the slide core via the cam mechanism and moving the slide core with respect to the movable mold to release the molded article from the slide core; a slide core moving step of moving the ejector member with the slide core via the cam mechanism in a direction away from the molded article; and a movable mold releasing step of releasing the molded article from the movable mold.

4 . The molding method according to claim 3 , wherein
the ejector member is locked to the movable mold via the cam mechanism in the slide core releasing step, and the ejector member is unlocked from the movable mold via the cam mechanism in the slide core moving step.

Assignees

• Toyota Motor Co Ltd

Inventors

• Kamata Hiroshi

Classifications

• B22D17/002

  using movable moulds (for plastics B29C45/04) · CPC title

• B22D17/22 Primary

  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

• B29C45/26

  Moulds · CPC title

• B22D17/2236

  Equipment for loosening or ejecting castings from dies (for plastics B29C45/40) · CPC title

• B29K2105/12

  of short lengths, e.g. chopped filaments, staple fibres or bristles · CPC title