B - Operations – Transporting – 29 – C
Patent
B - Operations, Transporting
29
C
B29C 49/42 (2006.01) B29C 47/06 (2006.01) B29C 47/20 (2006.01) B29C 49/28 (2006.01) B29C 55/28 (2006.01)
Patent
CA 2355147
A tube film blowing head includes one outer and one inner nozzle ring in which a ring chamber is formed extending in a conical or parabolic manner towards the circular nozzle gap and of which the inner nozzle ring, wherein a central bore for exchanging the pressurized air is connected by means of a screw connection to a central cone piece of the blowing head. This central cone piece has a bore that is aligned to the central bore. In order to create a screw connection between the inner nozzle ring and the center cone piece that is firm and simple to produce, the inner nozzle ring is connected to the central cone piece by means of a threaded bolt penetrating the central bore of the nozzle ring and provided with an axial bore in that the threaded bolt is screwed into the bore of the cone piece as the bore is also a threaded bore.
Une tête de soufflage pour pellicule tubulaire comprend une bague d'embout interne dans laquelle est formée une chambre de bague conique ou parabolique qui s'élève jusqu'à l'ouverture circulaire de l'embout et où se trouve un orifice central pour l'échange d'air pressurisé, raccordé par une connexion à vis à la partie conique centrale de la tête de soufflage. Cette partie conique centrale est percée d'un orifice aligné sur l'orifice central. Pour obtenir une connexion à vis entre la bague d'embout interne et la partie conique centrale qui soit à la fois ferme et simple à produire, la bague d'embout interne est raccordée à la partie conique centrale au moyen d'un boulon taraudé introduit dans l'orifice central de la bague d'embout et muni d'un orifice axial, le boulon taraudé étant vissé dans l'orifice, également taraudé, de la partie conique.
Shapiro Cohen
Windmoeller & Hoelscher Kg
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