Patent ID: 6303066
Filing Date: 2001-10-16
Classification: B29C,B29L

Abstract:
An opening device moulding apparatus for injection moulding plastics material opening devices at holes in a packaging material sheet, comprising:at least one first mould tool arrangeable in a closed position so as to be in contact with a first side of the sheet positioned at said opening device moulding station and arrangeable in an open position so as to be positioned distally from the first side of the sheet positioned at said opening device moulding station;at least one second mould tool arrangeable in a closed position so as to be in contact with a second side of the sheet positioned at said opening device moulding station and arrangeable in an open position so as to be positioned distally from the second side of the sheet positioned at said opening device moulding station;wherein in the closed positions of said first and second mould tools a mould cavity is formed between said first and second mould tools for at least partially accommodating a hole edge in the sheet positioned at said opening device moulding station;an injection passage for injecting heated thermoplastics material into said mould cavity, wherein said injection passage extends in at least one of said first and second mould tools such that the thermoplastics material is injected directly into the mould cavity at an injection point of the mould cavity which is located distally from said hole edge accommodated in said mould cavity; anda drive mechanism for selectively moving said first mould tool and said second mould tool between said open and closed positions, at least one of said first and second mould tools including a pair of half mould tools, wherein said drive mechanism is configured such that the direction of movement of each of said half mould tools between said open and closed positions tangentially follows a circular path.