Moulding device for the production of containers made from a thermoplastic material

A moulding device for the production of containers by blow moulding or stretch-blow moulding from preforms made from a heated thermoplastic material, said device comprising at least one mould comprising at least two half moulds and driving means capable of displacing said half moulds between an open position in which said half moulds are separated from each other and a closed position in which said half moulds are tightly pressed against each other by respective mating faces defining a joint plane and in which said half moulds define a mould cavity, said two half moulds being hinged to each other in rotation about a hinge axis contained in said joint plane and perpendicular to an axis of said mould cavity, said hinge axis being below said two half moulds, means of locking said two half moulds in said closed position also being provided, each half mould having an outer surface zone capable of abutting against an inner surface zone of said means of locking said two half moulds in said closed position, said outer surface zone of each half mould having a shape complementary to said inner surface zone of said locking means, such that, when said two surface zones are placed in contact against each other, the generation of two forces results therefrom, directed in opposing directions radially inwards on said two half moulds, and said locking means having the form of a collar capable of encircling said two half moulds in a closed position, wherein said driving means comprise a moving assembly capable of displacement in a direction substantially parallel to said axis of said mould cavity and cooperating with said two half moulds so that, when said moving assembly is in the lower position, said two half moulds are in an open position, and that when said moving assembly is in the upper position, said two half moulds are in a closed position and in that said collar belongs to said means of driving said two half moulds;

• wherein said driving means comprise means having cooperating cam followers and cams provided on lateral faces of said two half moulds, close to said respective mating faces and on said moving assembly.

A moulding device for the production of containers by blow moulding or stretch-blow moulding from preforms made from a heated thermoplastic material, said device comprising at least one mould comprising at least two half moulds and driving means capable of displacing said half moulds between an open position in which said half moulds are separated from each other and a closed position in which said half moulds are tightly pressed against each other by respective mating faces defining a joint plane and in which said half moulds define a mould cavity, said two half moulds being hinged to each other in rotation about a hinge axis contained in said joint plane and perpendicular to an axis of said mould cavity, said hinge axis being below said two half moulds, means of locking said two half moulds in said closed position also being provided, each half mould having an outer surface zone capable of abutting against an inner surface zone of said means of locking said two half moulds in said closed position, said outer surface zone of each half mould having a shape complementary to said inner surface zone of said locking means, such that, when said two surface zones are placed in contact against each other, the generation of two forces results therefrom, directed in opposing directions radially inwards on said two half moulds, and said locking means having the form of a collar capable of encircling said two half moulds in a closed position, wherein said driving means comprise a moving assembly capable of displacement in a direction substantially parallel to said axis of said mould cavity and cooperating with said two half moulds so that, when said moving assembly is in the lower position, said two half moulds are in an open position, and that when said moving assembly is in the upper position, said two half moulds are in a closed position and in that said collar belongs to said means of driving said two half moulds;

• wherein said driving means comprise a roller capable of cooperating with a cam and which is fixed on said moving assembly so as to control said displacement of said moving assembly in a direction substantially parallel to said axis of said mould cavity.

A moulding device for the production of containers by blow moulding or stretch-blow moulding from preforms made from a heated thermoplastic material, said device comprising:

• a mould comprising two half moulds;
• a cam and follower assembly configured to displace the half moulds between an open position in which the half moulds are separated from each other and a closed position in which the half moulds are pressed against each other by respective mating faces, the two half moulds define a mould cavity, and the two half moulds hinged about a hinge axis, said hinge axis below the two half moulds;
• a locking device having a collar that locks the two half moulds in the closed position, each half mould having an outer surface configured to abut an inner surface zone of the locking device in the closed position, the outer surface of each half mould having a shape complementary to the inner surface of the locking device, such that, when the two surfaces are in contact against each other, two forces are generated on the two half moulds, the two forces directed in opposing directions and radially inwards, wherein the collar is configured to encircle the two half moulds in the closed position;
• the cam and follower assembly also configured to displace the collar between a lower position and an upper position in a direction substantially parallel to a longitudinal axis of the mould cavity and cooperating with the two half moulds so that when the collar is in the lower position, the two half moulds are in the open position, and when the collar is in the upper position, the two half moulds are in the closed position;
• and
• the moulding device further comprising a mould base axially moveable and coupled to one of the two half moulds.

A moulding device for the production of containers by blow moulding or stretch-blow moulding from preforms made from a heated thermoplastic material, said device comprising:

• a mould comprising two half moulds;
• a cam and follower assembly configured to relatively displace the two half moulds between an open position in which the half moulds are separated from each other and a closed position in which the two half moulds are pressed against each other by respective mating faces, the two half moulds define a mould cavity, and the two half moulds hinged about a hinge axis, said hinge axis below the two half moulds;
• a locking device having a sleeve and collar that locks the two half moulds in the closed position, each half mould having an outer surface configured to abut an inner surface zone of the locking device in the closed position, the outer surface of each half mould having a shape complementary to the inner surface of the locking device, such that, when the two surfaces are in contact against each other, two forces are generated on the two half moulds, the two forces directed in opposing directions and radially inwards, wherein the collar is configured to encircle the two half moulds in the closed position;
• the cam and follower assembly also configured to displace the collar between a lower position and an upper position in a direction substantially parallel to a longitudinal axis of the mould cavity and cooperating with the two half moulds so that when the collar is in the lower position, the two half moulds are in the open position, and when the collar is in the upper position, the two half moulds are in the closed position;
• the cam and follower assembly comprising cam followers provided on one of the two half moulds and the sleeve and cams provided on the other one of the two half moulds and the sleeve.