Moulding equipment

• US 4,591,330 A
• Filed: 11/05/1984
• Issued: 05/27/1986
• Est. Priority Date: 11/05/1984
• Status: Expired due to Term

• Current Assignee: Nortel Networks Corporation
• Original Assignee: Northern Telecom Limited (Nortel Networks Corporation)
• Inventors: Charlebois, Leonard J., Brown, Peter A.
• Primary Examiner(s): Hoag, Willard E.
• Application Number:
  US06/668,599
• Time in Patent Office: 568 Days
• Field of Search: 156/49, 156/50, 156/56, 29/460, 29/527.2, 29/527.3, 29/527.4, 425/117, 425/127, 425/129 R, 425/567, 425/122, 403/330, 285/310, 285/312, 285/320
• US Class Current: 425/567
• CPC Class Codes: B29C 45/036 Injection pistols
• CPC Class Codes: F16B 21/16 with grooves or notches in the pin or shaft
• CPC Class Codes: F16L 37/12 using hooks, pawls or other movable or insertable locking members F16L37/084 takes precedence
• CPC Class Codes: H02G 1/145 Moulds

Abstract

Moulding equipment in which cooperable male and female connectors of a mould and a dispensing container for mouldable material have means to lock them together. This includes a locking member which is manually moveable in pivotal fashion upon one connector into and out of a locking position with the other connector.

Opposing surfaces of the locking member and the other connector relatively move across each other during movement of the locking member while offering sufficiently low resistance to movement to allow for manual operation. During transfer of the material into the mould, the opposing surfaces are urged together by moulding pressure to increase resistance to movement of the locking member out of the locking position. In preferred constructions, the locking member has a cam surface which ensures the need for a progressively increasing unlocking force to enable release of the locking member during transfer of the mouldable material.

Claims

1. Moulding equipment comprising a mould and a dispensing container for dispensing molten mouldable material into the mould, the mould and container having cooperable male and female connectors to connect them together for allowing transfer of pressurized fluid from the container into the mould, the female connector having a slot extending radially from its outer periphery to a central orifice and with the length of the slot lying in a circumferential direction of the orifice, the slot pivotally carrying a locking member about an axis parallel to the axis of the central orifice, the locking member being pivotally movable through the slot into and out of a locking position in which the locking member has a locking cam projecting radially into the orifice;

and the male connector formed with a circumferential recess and being insertable into the orifice with the recess aligned with the cam for movement of the cam into the recess and, during movement of the locking member into the locking position, surfaces of the cam and the circumferential recess oppose each other axially of the connectors and move relatively one across the other while normally offering sufficiently low resistance to movement of the locking member so as to allow for manual operation, and during transfer of pressurized fluid, said surfaces are urged together axially of the connectors by a force applied by internal fluid pressure to provide or increase resistance to relative movement of the surfaces, thereby to increase resistance to movement of the locking member out of the locking position.

2. Moulding equipment according to claim 1 wherein the cam and the recess have opposing surfaces which are inclined to the axial direction of the connectors.

3. Moulding equipment according to claim 1 wherein the locking cam surface is shaped to coact with the surface of the circumferential recess to ensure that a progressively increasing unlocking force is required during transfer of molten material into the mould to move the locking member out of the locking position.