Clamping device and molding apparatus

Patent metadata

Field	Value
Publication number	US-10086428-B2
Application number	US-201514757494-A
Country	US
Kind code	B2
Filing date	Dec 23, 2015
Priority date	Dec 25, 2014
Publication date	Oct 2, 2018
Grant date	Oct 2, 2018

Abstract

The clamping device has a fixed platen, a moving platen which is movable in an mold opening and closing direction relative to the fixed platen, a tie bar which bridges the fixed platen and the moving platen, a pullout drive device which gives to the tie bar a driving force making the tie bar move to the back side of the fixed platen, and a support mechanism which is provided separately from the pullout drive device and support the load of the tie bar when moving the tie bar.

First claim

The invention claimed is:

1. A clamping device comprising:
a fixed platen,
a moving platen movable in a mold opening and closing direction relative to said fixed platen,
a tie bar which bridges said fixed platen and said moving platen,
a pullout drive device which generates a driving force in the mold opening and closing direction,
a support mechanism which is fixed relative to one of the fixed platen and the movable platen and provided separately from said pullout drive device and a mold opening and closing drive device, and
a movable part movably coupled to the support mechanism and coupled to the tie bar so that the support mechanism supports a load of the tie bar through the movable part when the tie bar moves, and transmits the driving force from the pullout drive device to the tie bar in a direction parallel thereto to make said tie bar move to a back side of one platen of said fixed platen and said moving platen until the tie bar is pulled out from the other platen of said fixed platen and said moving platen, the pullout drive device being provided separately from a mold opening and closing drive device moving the moving platen to open and close molds.

2. The clamping device according to claim 1 , wherein:
said support mechanism has a suspension member which is provided separately from said pullout drive device and extends above said tie bar to the back side of said one platen, and
the movable part is suspended from said suspension member so as to be movable in the mold opening and closing direction and suspends said tie bar at the back side of said one platen.

3. The clamping device according to claim 2 , wherein said one platen is said fixed platen, and said suspension member is supported upon said fixed platen.

4. The clamping device according to claim 2 , wherein said pullout drive device gives the driving force in the mold opening and closing direction to a position of said movable part, the position being between said suspension member and said tie bar in an up-down direction.

5. The clamping device according to claim 2 , comprising two parallel tie bars, wherein said movable part has a connecting device which is selectively connected with respect to one, the other, and both of the two tie bars.

6. The clamping device according to claim 1 , further comprising:
a display device and
a control device for controlling said pullout drive device and said display device, wherein
said control device controls said display device so as to display an abnormality in a predetermined manner at least at one of a time when the pullout or insertion of said tie bar does not end within a predetermined time and a time when a load of said pullout drive device exceeds a predetermined threshold value at the time of pullout or insertion of said tie bar.

7. A molding apparatus comprising a clamping device of claim 1 .

8. The clamping device according to claim 1 , wherein the movable part is shared by the support mechanism and the pullout drive device.

9. A clamping device comprising:
a fixed platen,
a moving platen movable in a mold opening and closing direction relative to said fixed platen,
a tie bar which bridges said fixed platen and said moving platen,
a pullout drive device which gives to said tie bar a driving force in the mold opening and closing direction which makes said tie bar move to a back side of one platen of said fixed platen and said moving platen, and
a support mechanism which is provided separately from said pullout drive device and supports a load of said tie bar when the tie bar moves;
wherein said support mechanism has:
a suspension member which is provided separately from said pullout drive device and extends above said tie bar to the back side of said one platen and
a movable part which is suspended from said suspension member so as to be movable in the mold opening and closing direction and suspends said tie bar at the back side of said one platen; and
wherein said movable part has
a body member which is connected to said tie bar and
a rolling member which is pivotally supported by said body member to be able to roll in the mold opening and closing direction on the upper surface of said suspension member.

10. A clamping device comprising:
a fixed platen,
a moving platen movable in a mold opening and closing direction relative to said fixed platen,
a tie bar which bridges said fixed platen and said moving platen,
a pullout drive device which gives to said tie bar a driving force in the mold opening and closing direction which makes said tie bar move to a back side of one platen of said fixed platen and said moving platen,
a support mechanism which is provided separately from said pullout drive device and supports a load of said tie bar when the tie bar moves,
a split nut device which is provided at the other platen of said fixed platen and said moving platen and meshes with an engaged part provided at said tie bar, and
a scraper which abuts against said engaged part.

11. A clamping device comprising:
a fixed platen,
a moving platen movable in a mold opening and closing direction relative to said fixed platen,
a tie bar which bridges said fixed platen and said moving platen,
a pullout drive device which gives to said tie bar a driving force in the mold opening and closing direction which makes said tie bar move to a back side of one platen of said fixed platen and said moving platen, and
a support mechanism which is provided separately from said pullout drive device and supports a load of said tie bar when the tie bar moves,
a split nut device which is provided at the other platen of said fixed platen and said moving platen and meshes with an engaged part provided at said tie bar, and
a nozzle which is capable of spraying gas toward said engaged part.

Assignees

• Toshiba Machine Co Ltd

Inventors

• Fujioka Toshiharu
• Watarai Kohei
• Noda Saburo

Classifications

• B22D33/04

  Bringing together or separating moulds · CPC title

• B22D17/263 Primary

  mechanically · CPC title