Patent ID: 7878794
Filing Date: 2011-02-01
Classification: B29C

Abstract:
1. Moulding device for the manufacture of thermoplastic containers by the blow moulding or stretch-blow moulding of hot preforms in a mould with which a blowing assembly is associated, said mould comprising at least two half-moulds that can move relative to each other between an open position in which the two half-moulds are moved away from each other and a closed position in which the two half-moulds are mated against each other along a mold parting surface and define an internal moulding cavity, said blowing assembly including a blowing nozzle and being able to move axially above said mould between a raised position in which the end of the nozzle is raised above the mould and a lowered position or blowing position in which the end of the nozzle is in fluid communication with a preform supported in the cavity of the mould, wherein said two half-moulds comprise, on or close to their respective faces turned towards the blowing nozzle, two respective parts which, in the closed position of the mould, together define a male element at least partly bordered externally by a lateral wall inclined towards the blowing nozzle, and in that said blowing assembly comprises a female element which is at least partly bordered internally by a lateral wall which is inclined complementarily to the inclination of the lateral wall of said male element and which is dimensioned so as to be capable, in the blowing position of the blowing assembly, of tightly clamping said male element of the closed mould, whereby the cooperation between the female element and the male element locks the upper part of the mould in the closed position.