B - Operations – Transporting – 29 – C
Patent
B - Operations, Transporting
29
C
B29C 49/00 (2006.01) B29C 47/14 (2006.01) B29C 49/04 (2006.01) B29C 49/20 (2006.01) B29C 51/00 (2006.01) B29C 51/12 (2006.01) B29C 69/00 (2006.01)
Patent
CA 2654167
The invention relates to a method for producing hollow bodies from thermoplastic material by extrusion blow moulding. In the method according to the invention, at least two preforms (6) are continuously extruded in web form from plasticated polymer by means of a number of extrusion devices (2). The preforms are together moulded into a hollow body while still in the plastic state, i.e. in the first heat, within a multipart mould (1), forming a mould cavity (4a, 4b). During the extrusion, at least one preform is provided with a wall thickness profile independently of the other preform by continuous die gap adjustment during the extrusion.
L'invention concerne un procédé de fabrication de corps creux à partir de matière thermoplastique par moulage par extrusion-soufflage. Selon ce procédé, une extrusion en continue est réalisée d'au moins deux préformes (6) en forme de bandes en matière plastique au moyen de plusieurs dispositifs d'extrusion (2). Les préformes, encore à l'état plastique, c.-à-d. dans la première chaleur, sont transformées dans un outil (1) à éléments multiples formant une cavité (4a, 4b) en un corps creux. Pendant l'extrusion, au moins une préforme, indépendamment des autres préformes, est mise sous forme d'un profilé de paroi par ajustement continu de l'ouverture des buses pendant l'extrusion.
Borchert Matthias
Eckhardt Joachim
Eulitz Dirk
Froitzheim Thomas
Kraemer Timo
Fetherstonhaugh & Co.
Kautex Textron Gmbh & Co. Kg
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