# US 8,770,967 B2 · Device for blow-molding containers

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- Number: US 8,770,967 B2
- Document ID: US8770967B2
- Status: Granted
- Kind: B2
- Application number: 13/343,310
- Filed: 2012-01-04
- Published: 2012-07-12
- Granted: 2014-07-08
- Earliest claimed: 2011-01-04
- Assignees: Serac Group
- Applicants: André Graffin
- Inventors: André Graffin
- Web page: https://patentgrep.com/patent/US8770967B2

## CPC

- B29C 49/5602: {using cams}
- B29C 49/36: rotatable about one axis
- B29C 49/5603: {using toggle mechanism}
- B29C 49/5608: {Asymmetric movement of mould parts, e.g. by moving only one mould part}
- B29C: SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING (making preforms B29B11/00; making laminated products by combining previously unconnected layers which become one product whose layers will remain together B32B37/00 - B32B41/00)

## Abstract

A device for blow-molding containers, the device comprising a structure and a platform mounted to rotate on the structure about an axis of rotation, the platform being provided with blower members and with molds that are mounted under the blower members, each of which comprises a stationary mold portion and a movable mold portion that is movable by control means between an open position and a closed position for the mold, wherein the device includes blocking members for blocking the molds in the closed state, each blocking member comprising a strut mounted on the platform to move between a retracted position and a blocking position.

## Claims

### Claim 1

A device for blow-molding containers, the device comprising a structure and a platform mounted to rotate on the structure about an axis of rotation, the platform being provided with blower members and with molds that are mounted under the blower members, each of which comprises a stationary mold portion and a movable mold portion that is movable by control means between an open position and a closed position for the mold, wherein the device includes blocking members for blocking the molds in the closed state, each blocking member comprising a strut mounted on the platform to move between a retracted position and a blocking position in which the strut extends between the movable mold portion and an abutment element secured to the platform and positioned in such a manner that the strut extends in a direction along which a resultant of the blow-molding force as taken up by the movable mold portion is applied.

### Claim 2 (depends on 1)

A device according to claim 1, wherein the abutment element is a pivot shaft for pivoting the strut.

### Claim 3 (depends on 2)

A device according to claim 2, wherein the movable mold portion is secured to a pivot shaft mounted on the platform to pivot between the closed and open positions, the control means including a connecting rod connecting together a crank secured to the pivot shaft of the movable mold portion and a crank secured to the pivot shaft of the strut.

### Claim 4 (depends on 3)

A device according to claim 3, wherein the control means comprise a wheel secured to one of the cranks in order to co-operate with a cam that is stationary relative to the structure and that is shaped to move the movable mold portion and the strut into their two positions.

### Claim 5 (depends on 1)

A device according to claim 1, wherein the mold portions and the strut are mounted in a frame that is fastened on the platform.

### Claim 6 (depends on 1)

A device according to claim 1, wherein the strut is of a height that is substantially identical to the height of the mold.

### Claim 7 (depends on 5)

A device according to claim 5, wherein the stationary mold portion is mounted on a presser element for pressing the stationary mold portion against the movable mold portion.

### Claim 8 (depends on 7)

A device according to claim 7, wherein the presser element comprises a body slidably receiving a piston in a chamber to slide in a direction parallel to the direction in which the resultant of the blow-molding force is applied, the piston being subjected to blow-molding pressure and the stationary mold portion being secured to move in translation with the piston.