Mold clamping mechanism

Patent metadata

Field	Value
Publication number	US-9738020-B2
Application number	US-201514816956-A
Country	US
Kind code	B2
Filing date	Aug 3, 2015
Priority date	Aug 4, 2014
Publication date	Aug 22, 2017
Grant date	Aug 22, 2017

Abstract

A mold clamping mechanism includes a fixed platen and a movable platen. The fixed platen includes upper and lower, left and right through-holes through which extend tie-bars, and a cutout that extends transversely through the through-holes and divides the through-holes into mold-side holes and opposite-mold-side holes. The fixed platen is divided by the cutout into a mold-side part and an opposite-mold-side part. The mold-side part is provided with main leg parts connected to the bed.

First claim

What is claimed is:

1. A mold clamping mechanism comprising:
a bed;
a fixed platen secured to the bed;
a pressure receiving platen secured to the bed;
upper and lower, left and right tie-bars extending between the fixed platen and the pressure receiving platen; and
a movable platen mounted to the tie-bars, the movable platen and the fixed platen capable of being operated to effect clamping of a mold, wherein
the fixed platen includes upper and lower, left and right through-holes through which extend respective ones of the tie-bars, and a cutout that extends transversely through the through-holes and divides the through-holes into mold-side holes and opposite-mold-side holes,
the fixed platen is divided by the cutout into a mold-side part and an opposite-mold-side part, and
the mold-side part is provided with main leg parts connected to the bed.

2. A mold clamping mechanism according to claim 1 , wherein the mold-side hole has a diameter larger than that of the opposite-mold-side hole.

3. A mold clamping mechanism according to claim 1 , wherein the opposite-mold-side part is provided with a sub-leg part connected to the bed, the sub-leg part being provided within the left and right through-holes.

4. A mold clamping mechanism according to claim 3 , wherein the sub-leg part has an extension extending toward an injection machine beyond an opposite-mold-side surface of the opposite-mold-side part.

5. A mold clamping mechanism according to claim 1 , further comprising a connection part connecting the mold-side part and the opposite-mold-side part, wherein the connection part comprises: a center part surrounding a sprue; an upward protrusion protruding upward from the center part; a leftward protrusion protruding leftward from the center part; a rightward protrusion protruding rightward from the center part; and a downward protrusion protruding downward from the center part.

6. A mold clamping mechanism according to claim 5 , wherein the downward protrusion comprises at least two strap-shaped protruding parts spaced from each other in a left-and-right direction.

7. A mold clamping mechanism according to claim 5 , wherein the upward protrusion is T-shaped and has an orthogonal part extending along an upper side of the mold-side part, the leftward protrusion is T-shaped and has an orthogonal part extending along a left side of the mold-side part, and the rightward protrusion is T-shaped and has an orthogonal part extending along a right side of the mold-side part.

8. A mold clamping mechanism according to claim 5 , wherein the opposite-mold-side part is connected to left and right main leg parts through left and right connection parts.

9. A mold clamping mechanism according to claim 1 , wherein the fixed platen has two opposed major surfaces bounded by a side surface, the through-holes extend through the fixed platen from one major surface to the other major surface, and the cutout comprises a groove that extends circumferentially around the side surface to a depth that passes through the through-holes.

10. A mold clamping mechanism according to claim 9 , wherein the depth direction of the groove is transverse to the longitudinal direction of the through-holes.

Assignees

• Nissei Plastics Ind Co

Inventors

• Murata Atsushi
• Shioiri Kimiaki
• Nishizawa Tatsuhiko
• Yamaguchi Isamu
• Tanaka Kazunori

Classifications

• B29C45/661 Primary

  using a toggle mechanism for mould clamping · CPC title

• B29C45/1744 Primary

  Mould support platens · CPC title