Male element of a mould
AssigneeSacmi Cooperativa Meccanici Imola Societa' Cooperativa
InventorsDavide Baldisserri, Stefano Bergami, Marcello Zama
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Abstract
A male element (100) of a mould (10) for the compression moulding of a parison comprises a die (110) and a ducting system (117), located inside the die (110) to allow a cooling fluid to flow in the male element (100), wherein the die (110) comprises: a body (112); a liner (116) fitted round the body (112) and having an outside surface, acting in conjunction with a female element (200) of the mould (10) to delimit a forming cavity (20), and an inside surface in contact with the outside surface of the body (112), wherein the ducting system (117) is formed between the body (112) and the liner (116).
Claims20
A male element of a mould for compression moulding of a parison from a previously prepared charge of thermoplastic material, wherein the male element is associable with a female element of the mould to delimit a forming cavity intended for forming the parison, comprising:
- a die, extending along a longitudinal axis, the die including a body having an outside surface and a liner fitted round the body, the liner having an outside surface, acting in conjunction with the female element of the mould to delimit the forming cavity, and an inside surface in contact with the outside surface of the body;
- and
- a ducting system located inside the die to allow a cooling fluid to flow in the male element, the ducting system including a delivery duct for circulating the cooling fluid towards one end of the die and a return duct for circulating the cooling fluid returning from the end of the die, wherein the delivery duct is shaped as a first helix wound around the longitudinal axis and the return duct is shaped as a second helix wound around the longitudinal axis, wherein at least one coil of the first helix is interposed, along the longitudinal axis, between a first and a second coil of the second helix, the ducting system being formed between the body and the liner.
A method for compression moulding of a parison, the method comprising:
- receiving a previously prepared charge of thermoplastic material in a mould;
- forming the parison from the charge in a forming cavity delimited by a male element and a female element of the mould,
- wherein the male element comprises
- a die, extending along a longitudinal axis, the die including a body having an outside surface and a liner fitted round the body, the liner having an outside surface, acting in conjunction with the female element of the mould to delimit the forming cavity, and an inside surface in contact with the outside surface of the body, and
- a ducting system, located inside the die to allow a cooling fluid to flow in the male element, the ducting system including a delivery duct for circulating the cooling fluid towards one end of the die and a return duct for circulating the cooling fluid returning from the end of the die, wherein the delivery duct is shaped as a first helix wound around the longitudinal axis and the return duct is shaped as a second helix wound around the longitudinal axis, wherein at least one coil of the first helix is interposed, along the longitudinal axis, between a first and a second coil of the second helix, the ducting system being formed between the body and the liner;
- and
- cooling the die by passing a cooling fluid through the ducting system.
A male element of a mould for compression moulding of a parison from a previously prepared charge of thermoplastic material, wherein the male element is associable with a female element of the mould to delimit a forming cavity intended for forming the parison, comprising:
- a die, extending along a longitudinal axis, the die including a body having an outside surface and a liner fitted round the body and having an outside surface, acting in conjunction with the female element of the mould to delimit the forming cavity, and an inside surface in contact with the outside surface of the body;
- and
- a ducting system located inside the die to allow a cooling fluid to flow in the male element, the ducting system including a plurality of delivery ducts and a plurality of return ducts wherein one delivery duct is formed in a longitudinal cavity of the body of the die, extending along the longitudinal axis, and one or more return ducts are defined in the ducting system between the body and the liner of the die, wherein the one or more return ducts are defined by a plurality of grooves extending in parallel with the longitudinal axis and connected to each other in parallel, the ducting system being formed between the body and the liner.
Dependencies are inferred from the claim text.