Apparatus for shaping plastics material pre-forms into plastics material containers with pressure pads

Patent metadata

Field	Value
Publication number	US-9457524-B2
Application number	US-201213562979-A
Country	US
Kind code	B2
Filing date	Jul 31, 2012
Priority date	Aug 19, 2011
Publication date	Oct 4, 2016
Grant date	Oct 4, 2016

Abstract

An apparatus for forming plastic pre-forms into containers with a blow mold which has at least two movable blow mold parts which, when closed form a container-forming cavity. The first blow mold part is removably arranged on a first blow mold carrier shell part, and the second blow mold part is removably arranged on a second blow mold carrier shell part. The first blow mold carrier shell part is movable with respect to the second blow mold carrier shell part for opening the mold. A holding device holds at least one blow mold part on the respective blow mold carrier shell part. The holding device has an actuating member extending through an opening in a wall of the blow mold carrier shell part. The actuating member is movable relative to the wall, and a first holding element for holding the blow mold part is arranged on the actuating member.

First claim

The invention claimed is:

1. An apparatus for shaping plastics material pre-forms into plastics material containers with a blow mould which has at least two blow mould parts which are arranged so as to be movable with respect to each other and which in a closed state of the blow mould form a cavity, in the interior of which the plastics material pre-forms are expanded to form the plastics material containers by being acted upon with a flowable medium, comprising:
the first blow mould part is arranged in a removable manner on a first blow mould carrier shell part and the second blow mould part is arranged in a removable manner on a second blow mould carrier shell part and the first blow mould carrier shell part is movable with respect to the second blow mould carrier shell part in order to open and close the blow mould;
a holding device is provided in order to hold at least one blow mould part on the blow mould carrier shell part associated with it;
the holding device has an actuating member which extends through an opening formed in a wall of the blow mould carrier shell part and/or a blow mould carrier part, wherein said actuating member is movable with respect to the wall;
a first holding element for holding the blow mould part is arranged on the actuating member; and
at least one blow mould carrier shell part is arranged on a blow mould carrier part and a pressure pad arrangement is arranged between the blow mould carrier part and the blow mould carrier shell part,
wherein a second holding element, which co-operates with the first holding element to fasten the blow mould part to the blow mould carrier shell part, is fastened to the blow mould part, wherein the second holding element projects with respect to the wall of the blow mould part, and
wherein two pressure pads are arranged at a distance from each other by continuous seals and which exert force components that are oriented at a pre-set angle relative to each other upon the blow mould or the carrier shell for the blow mould respectively.

2. The apparatus according to claim 1 , wherein the movement of the actuating member with respect to the wall is produced by a flowable medium and, in particular, in a pneumatic manner.

3. The apparatus according to claim 1 , wherein a connection for a flowable medium is provided on at least one said blow mould carrier shell part.

4. The apparatus according to claim 1 , wherein the actuating member has a piston configured for being acted upon by a pressure medium.

5. The apparatus according to claim 1 , wherein the opening is situated in a recess formed in the wall.

6. The apparatus according to claim 1 , wherein in a fixed state of the blow mould part on the blow mould carrier shell part a holding element engages behind the second holding element.

7. The apparatus according to claim 1 , wherein a relative movement of a blow mould part with respect to the blow mould carrier shell part holding this blow mould part is made possible in at least one state despite the engagement of the holding elements one in the other.

8. The apparatus of claim 1 wherein the pressure pad arrangement has a first pressure pad device and a second pressure pad device which are separated from each other at least in part or locally respectively.

9. The apparatus according to claim 1 , wherein by means of the pressure pad arrangement the two blow mould parts can be pressed against each other during the expansion procedure and, in this way, a contour of the containers can be improved.

10. The apparatus according to claim 1 , wherein the apparatus comprises a first locking element and a second locking element and wherein the second locking element engages into the first locking element for locking the blow mould during the expansion procedure.

11. The apparatus according to claim 1 , wherein the actuating member has a piston capable of being acted upon by a pressure medium.

12. The apparatus according to claim 1 , wherein the second holding element is connected in a rigid manner to the blow mould part.

13. The apparatus according to claim 7 wherein the relative movement of the blow mould part with respect to the blow mould carrier shell part is only possible in a loosened state of the holding device, but not in a state fastened or mounted in a fixed manner.

14. The apparatus according to claim 1 wherein the blow mould part is first applied to the blow mould carrier shell part and then rotated with respect to the latter and in this rotated state the blow mould part is locked in a fixed manner by the actuating member.

15. The apparatus according to claim 1 , wherein the pressure pad arrangement is designed in such a way that a force acting between the blow mould carrier part and the blow mould part has a first force component which acts in a first pre-set region in a peripheral direction of the blow mould part and a second force component which acts in a second pre-set region in the peripheral direction of the blow mould part and wherein the first region and the second region being arranged at a distance from each other and the directions of the first force component and the second force component extending at an angle different from 0 degrees with respect to each other.

16. The apparatus according to claim 15 , wherein the first force component acts in the first pre-set region, which is preferably capable of being spatially defined or bounded respectively in the peripheral direction of the blow mould part.

17. An apparatus for shaping plastics material pre-forms into plastics material containers with a blow mould which has at least two blow mould parts which are arranged so as to be movable with respect to each other and which in a closed state of the blow mould form a cavity, in the interior of which the plastics material pre-forms are expanded to form the plastics material containers by being acted upon with a flowable medium, comprising:
the first blow mould part is arranged in a removable manner on a first blow mould carrier shell part and the second blow mould part is arranged in a removable manner on a second blow mould carrier shell part and the first blow mould carrier shell part is movable with respect to the second blow mould carrier shell part in order to open and close the blow mould;
a holding device is provided in order to hold at least one blow mould part on the blow mould carrier shell part associated with it;
the holding device has an actuating member which extends through an opening formed in a wall of the blow mould carrier shell part and/or a blow mould carrier part, wherein said actuating member is movable with respect to the wall;
a first holding element for holding the blow mould part is arranged on the actuating member; and
at least one blow mould carrier shell part is arranged on a blow mould carrier part and a pressure pad arrangement is arranged between the blow mould carrier part and the blow mould carrier shell part,
wherein the blow mould part is first applied to the blow mould carrier shell part and then rotated with respect to the latter and in this rotated state the blow mould part is locked in a fixed manner by the actuating member; and
wherein two pressure pads are arranged at a distance from each other by continuous seals and which exert force components that are oriented at a pre-set angle relative to each other upon the blow mould or the carrier shell for the blow mould respectively.

18. The apparatus for shaping plastics material preforms into plastics material containers, according to claim 17 , wherein the pressure pad arrangement has a first pressur

Assignees

• Blochmann Erik
• Geltinger Florian
• Philipp Thomas
• Krones Ag

Inventors

• Blochmann Erik
• Geltinger Florian
• Philipp Thomas

Classifications

• B29C49/42418 Primary

  for sterilizing · CPC title

• B29C33/30

  Mounting, exchanging or centering {(moulds, mould parts or cores; B29C33/485 takes precedence)} · CPC title

• B29C49/36

  rotatable about one axis · CPC title

• B29C49/06

  Injection blow-moulding · CPC title

• B29C2049/4864

  Fixed by a special construction to the mould half carriers, e.g. using insulating material between the mould and the mould half carrier · CPC title