# US 8,465,274 B2 · Moulding unit for a plant for blow-moulding plastic containers, particularly bottles

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- Number: US 8,465,274 B2
- Document ID: US8465274B2
- Status: Granted
- Kind: B2
- Application number: 13/054,856
- Filed: 2009-07-29
- Published: 2011-06-16
- Granted: 2013-06-18
- Earliest claimed: 2008-07-29
- Assignees: Sacmi Cooperativa Meccanici Imola Societa' Cooperativa
- Applicants: Maurizio Borgatti; Massimo Morovingi; Fiorenzo Parrinello; Emilio Re; Gabriele Stocchi
- Inventors: Maurizio Borgatti; Massimo Morovingi; Fiorenzo Parrinello; Emilio Re; Gabriele Stocchi
- Web page: https://patentgrep.com/patent/US8465274B2

## CPC

- B29C 49/42101: {Conveyors, e.g. flat conveyor or clamping between two bands}
- B29C 49/36: rotatable about one axis
- B29C 49/42095: {Rotating wheels or stars}
- B29C 49/48185: {with more than one separate mould cavity}
- B29C 49/5602: {using cams}
- B29C 49/561: {Characterised by speed, e.g. variable opening closing speed}
- B65G 29/00: Rotary conveyors, e.g. rotating discs, arms, star-wheels or cones (mechanical projectors B65G31/00; screw or rotary spiral conveyors B65G33/00)
- B29C 33/26: by pivotal movement
- B29C 49/42105: {for discontinuous or batch transport}
- B29C 49/5612: {characterised by bottom part movement}
- B29C 2049/4892: {Mould halves consisting of an independent main and bottom 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)
- B65G: TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS (packaging B65B; handling thin or filamentary materials, e.g. paper sheets or thread, B65H; cranes B66C; portable mobile or lifting or hauling appliances, e.g. hoists, B66D; devices for lifting or lowering goods for loading or unloading purposes, e.g. fork-lift trucks, B66F9/00; emptying bottles, jars, casks, barrels or similar containers, not otherwise provided for, B67C9/00; delivering or transferring liquids B67D; filling or discharging vessels for liquefied, solidified or compressed gases F17C; pipe-line systems for fluids F17D)

## Abstract

A plant for blow-moulding plastic containers (2), particularly bottles, from respective parisons (3) comprises at least one moulding unit (15) composed of two half-moulds (17a, 17b), each mobile relative to the other half-mould (17a, 17b) between a position of opening and a position of closing at least two cavities (19) for blow-moulding containers (2); the two half-moulds (17a, 17b) being oriented in such a way that they close in a closing plane (20) that is substantially tangent to the feed path (P) of the moulding unit (15).

## Claims

### Claim 1

A moulding unit for a plant for blow-moulding plastic containers (2), particularly bottles, from respective parisons (3), the moulding unit being movable along an annular path (P) and comprising two half-moulds (17a, 17b) positioned one on the inside and the other on the outside of the path (P), the half-mould (17b) on the outside being movable about a substantially vertical pivot axis (18) relative to the half-mould (17a) on the inside between a position of opening and a position of closing at least two cavities (19) for blow-moulding respective containers (2);
the two half-moulds (17a,17b) defining a closing plane (20) that is substantially tangent to the path (P), wherein both half-moulds (17a, 17b) are movable away from each other through different angles between respective open and closed positions, the angle of movement of the half-mould (17b) on the outside towards the outside of the path (P) being greater than the angle of movement of the half-mould (17a) on the inside towards the inside of the path (P),
wherein the half-mould (17a) on the inside of the path (P), in the respective open position, is rotated a predetermined angle apart from a position of finished blow moulded articles, inwardly with respect to said closing plane (20) that is substantially tangent to the path (P).

### Claim 2 (depends on 1)

The moulding unit according to claim 1, comprising a closing element (501) that is vertically movable between a raised position where it is partly inserted between the half-moulds (17a, 17b) in the closed position to form a mould bottom wall, and a lowered position where it does not impinge on the half-moulds (17a, 17b) so that the container (2) can be extracted from the mould after blow-moulding.

### Claim 3 (depends on 2)

The moulding unit according to claim 2, wherein the closing element (17a, 17b) comprises an upper portion (503) shaped in such a way as to impinge on an edge of an opening formed at the bottom of the half-moulds (17a, 17b) when they are in the closed position.

### Claim 4 (depends on 3)

The moulding unit according to claim 3, wherein the upper portion (503) of the closing element (501) forms an annular surface (504) shaped to match portions (505) of the inside surface of the half-moulds (17a, 17b), said matching surfaces being designed to hermetically seal the opening at the bottom of the half-moulds (17a, 17b) when they are in the closed position.

### Claim 5 (depends on 4)

The moulding unit according to claim 4, wherein said surfaces (504, 505) have at least one downwardly converging, tapered portion.

### Claim 6 (depends on 1)

The moulding unit according to claim 1, comprising a mould (16) defining two moulding cavities (19).

### Claim 7 (depends on 1)

A blow-moulding machine comprising a carousel and a plurality of moulding units associated with the carousel, wherein said moulding units are moulding units according to claim 1.

### Claim 8 (depends on 1)

The moulding unit according to claim 1, wherein the two half-moulds (17a, 17b) have corresponding contact surfaces, said contact surfaces being in contact with each other to define the closing plane in the closing position, wherein the half-mould (17a) on the inside of the path (P), in the respective open position, has its contact surface rotated inwardly, with respect to the closing plane (20) tangent to the path (P), of the angle of movement of said half-mould (17a) on the inside of the path (P), relative to the direction of rotation of the mould along the path (P).

### Claim 9 (depends on 1)

The moulding unit according to claim 1, wherein the moulding unit comprises a vertical shaft defining said pivot axis (18), and wherein the two half-moulds (17a, 17b) have corresponding ends configured to partially embrace said shaft, whereby each one of the two half-moulds (17a, 17b) is hinged to said shaft.

### Claim 10 (depends on 9)

The moulding unit according to claim 9, wherein said ends of the two half-moulds (17a, 17b) have corresponding fingers embracing the shaft and aligned in an alternating fashion along the vertical length of the shaft.