Opening/closing apparatus and molding apparatus

Patent metadata

Field	Value
Publication number	US-9802350-B2
Application number	US-201515321009-A
Country	US
Kind code	B2
Filing date	Jul 1, 2015
Priority date	Jul 1, 2014
Publication date	Oct 31, 2017
Grant date	Oct 31, 2017

Abstract

The present invention aims to stably maintain the posture of a crosshead by means of guide bars without an increase in the size of a link housing or tie bars. An opening/closing apparatus according to the present invention includes: a pressure-receiving plate ( 14 ); a fixed platen ( 12 ) to which a fixed mold ( 18 ) is to be mounted; a frame ( 11 ) on which the pressure-receiving plate ( 14 ) and the fixed platen ( 12 ) are installed; and a movable platen ( 16 ) which is movable on the frame ( 11 ) and to which a movable mold ( 19 ) is to be mounted. The opening/closing apparatus also includes: a crosshead movement mechanism including guide members ( 50 ) extending from the pressure-receiving plate ( 14 ), and a crosshead ( 25 ) whose movement is guided by the guide members ( 50 ); an opening/closing mechanism for opening/closing a mold, including a toggle link mechanism ( 22 ) connecting the pressure-receiving plate ( 14 ), the crosshead ( 25 ) and the movable platen ( 16 ), and a drive mechanism for driving the toggle link mechanism ( 22 ); and a guide member support mechanism for supporting the guide members ( 50 ). The guide member support mechanism has support portions ( 56 ) which are slidable on the upper surface of the frame ( 11 ).

First claim

The invention claimed is:

1. An opening/closing apparatus comprising:
a pressure-receiving plate;
a fixed platen to which a fixed mold is to be mounted;
a frame on which the pressure-receiving plate and the fixed platen are installed;
a movable platen which is movable on the frame and to which a movable mold is to be mounted;
a crosshead movement mechanism including guide members extending from the pressure-receiving plate, and a crosshead whose movement is guided by the guide members;
an opening/closing mechanism for opening/closing a mold, including a toggle link mechanism connecting the pressure-receiving plate, the crosshead and the movable platen, and a drive mechanism for driving the toggle link mechanism; and
a guide member support mechanism for supporting the guide members, wherein the guide member support mechanism has support portions which are slidable on an upper surface of the frame.

2. The opening/closing apparatus according to claim 1 ,
wherein front end portions of two horizontal arms of the crosshead each slidably fit around each of the guide members, and
wherein the guide member support mechanism includes columnar guide member support members which support the guide members and which are disposed on both sides of the crosshead.

3. The opening/closing apparatus according to claim 2 ,
wherein the guide member support members are each provided at the lower end with a support block as the support portion which is slidable on the upper surface of the frame.

4. The opening/closing apparatus according to claim 3 ,
wherein tie bars slidably fit, via guide bushes, into upper and lower portions of each guide member support member.

5. The opening/closing apparatus according to claim 2 ,
wherein the guide member support mechanism includes a first support member and a second support member which support each guide member support member from different directions, and
wherein the first support member is slidable on the upper surface of the frame, and the second support member, at its one end, is connected to the pressure-receiving plate and, at the other end, is connected to the first support member.

6. The opening/closing apparatus according to claim 5 , wherein the first support member is a support block provided at the lower end of each guide member support member and which supports the guide member support member in the vertical direction, and the second support member supports the guide member support member from a horizontal direction.

7. The opening/closing apparatus according to claim 6 , wherein the second support member is composed of a pair of support members which support the upper and lower ends of each guide member support member from a horizontal direction.

8. The opening/closing apparatus according to claim 1 ,
wherein the opening/closing apparatus is a mold clamping apparatus for opening/closing and clamping a mold in a molding apparatus.

9. The opening/closing apparatus according to claim 1 ,
wherein the opening/closing apparatus is a mold clamping apparatus provided in an injection molding machine.

10. A molding apparatus comprising the opening/closing apparatus according to claim 1 .

Assignees

• Toshiba Machine Co Ltd

Inventors

• Sasaki Noriyuki

Classifications

• B29C45/661 Primary

  using a toggle mechanism for mould clamping · CPC title

• B29C2045/665

  using a screw or screws having differently threaded parts arranged in series · CPC title

• B22D17/263

  mechanically · CPC title

• B22D17/26

  Mechanisms or devices for locking or opening dies · CPC title