Blow molding system for the manufacture of thermoplastic receptacles
AssigneeSidel Participations
InventorPatrick Mie
Life of this patent
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Abstract
A blow molding system for a thermoplastic blank which is supported in a mold. The system includes a fixed tubular body connected to a high-pressure fluid source and, at the lower end thereof, supporting moveable equipment consisting of a tuyere, the tuyere being defined laterally by a terminal sleeve of the moveable equipment and the bottom thereof being the front wall of the body, wherein the lateral inner wall of the sleeve is configured in such a way that the pressure of a fluid inside the tuyere does not result in a reaction force component on the lateral wall, which is directed opposite to the wall of the mold.
Claims11
A blow-molding system able to convey a blow-molding fluid at high pressure into a thermoplastic parison which is supported, in a blow-molding mold, by its neck emerging from a wall of the mold, said system comprising a stationary tubular body which is in communication with a source of high-pressure fluid and which, at its lower end, coaxially and slidably supports movable equipment comprising a blowing nozzle able, in the blowing position, to be placed in sealed communication with the neck of the parison, the nozzle being laterally defined by a terminal part, in the form of a sleeve, of the movable equipment, the tubular body having a transverse face which lies a fixed distance from the aforementioned wall of the mold, wherein
- the wall of the nozzle is formed by said transverse wall of the tubular body, and wherein
- the lateral interior wall of the sleeve is shaped in such a way that fluid pressure inside the nozzle does not generate, on said lateral wall, a reaction force component directed away from said wall of the mold.
Dependencies are inferred from the claim text.