Closing unit of a shaping machine

Patent metadata

Field	Value
Publication number	US-2016354952-A1
Application number	US-201615175424-A
Country	US
Kind code	A1
Filing date	Jun 7, 2016
Priority date	Jun 8, 2015
Publication date	Dec 8, 2016
Grant date	—

Abstract

A closing unit of a shaping machine includes a moveable clamping plate, a push rod connected to the moveable clamping plate and having an outside profile, a divided locking nut provided with an inside profile, and a closing force mechanism for acting on the moveable mold clamping plate with a closing force. The push rod is lockable in a closed position of the locking nut by the cooperation of the inside profile and the outside profile with the closing force mechanism. For displacement of the locking nut between an opened and the closed position, a rotary drive is provided for rotation of a shaft, and at least one toothed rack cooperates with the shaft by way of a tooth arrangement and is connected to the locking nut.

First claim

1 . A closing unit of a shaping machine comprising:
a moveable clamping plate, a push rod connected to the moveable clamping plate and having an outside profile, a divided locking nut provided with an inside profile, and a closing force mechanism for acting on the moveable mold clamping plate with a closing force, wherein the push rod is lockable in a closed position of the locking nut by the cooperation of the inside profile and the outside profile with the closing force mechanism, wherein for displacement of the locking nut between an opened and the closed position there is provided a rotary drive for rotation of a shaft and at least one toothed rack, which cooperates with the shaft by way of a tooth arrangement and which is connected to the locking nut.

2 . The closing unit as set forth in claim 1 , wherein there is provided a gear which is fixed to the shaft and which is motionally coupled to the at least one toothed rack by way of the tooth arrangement.

3 . The closing unit as set forth in claim 1 , wherein there are provided precisely two toothed racks cooperating with the shaft and connected to the locking nut.

4 . The closing unit as set forth in claim 1 , wherein the divided locking nut has two halves, each half preferably being connected to a toothed rack.

5 . The closing unit as set forth in claim 1 , wherein the rotary drive is in the form of an electric drive—in particular a servo motor.

6 . The closing unit as set forth in claim 1 , wherein there is provided a bypass element for bypassing the push rod for connecting the at least one toothed rack to the locking nut.

7 . The closing unit as set forth in claim 6 , wherein the bypass element is in the form of a bridge connected to the at least one toothed rack and two bars which are connected to the bridge and the locking nut.

8 . The closing unit as set forth in claim 4 and having a bypass element for bypassing the push rod for connecting the at least one toothed rack to the locking nut, wherein the bypass element in particular the bars serves as a guide for that half of the locking nut, to which the bypass element—in particular the bars—is not connected.

9 . The closing unit as set forth in claim 1 , wherein the shaft is arranged in a plane which is disposed substantially perpendicular to an axis of the push rod.

10 . The closing unit as set forth claim 1 , wherein the shaft is arranged substantially horizontally.

11 . The closing unit as set forth in claim 1 , wherein the at least one toothed rack is arranged substantially vertically.

12 . The closing unit as set forth in claim 1 , wherein there is provided a housing in which the tooth arrangement is arranged.

13 . The closing unit as set forth in claim 12 , wherein the housing is at least partially filled with a lubricant and has at least one seal to prevent loss of the lubricant.

14 . A shaping machine having a closing unit as set forth in claim 1 .

Assignees

• Engel Austria Gmbh

Inventors

• Dirneder Franz
• Eppich Stephan
• Wiesinger Helmut

Classifications

• B29C2045/664

  using mould clamping means operating independently from the mould closing means · CPC title

• B29C45/6728 Primary

  the separate element consisting of coupling rods · CPC title

• B29C45/6707

  without relative movement between the piston and the cylinder of the clamping device during the mould opening or closing movement · CPC title

• B22D17/26

  Mechanisms or devices for locking or opening dies · CPC title

• B29C33/202 Primary

  Clamping means operating on closed or nearly closed mould parts, the clamping means being independently movable of the opening or closing means (clamping devices for injection moulding machines B29C45/64) · CPC title