摘要:
In order to produce a good cross-laminated film structure with a reduced, predetermined connection between the plies, or in order to produce a tubular product whose cooling can be more precisely controlled and which is stiffer, a unitary tubular product having an inner layer 9 and an outer layer 10 connected together by a bi-planar mesh formed of helical ribs 13, 14 bonded at their cross-over points 15 is produced in a single coaxial tubular extrusion process, the structure being integrally or confluently extruded. The extruder die head has annular flow channels 7, 8 having closely-spaced die grooves 7b, 86.
摘要:
L'invention concerne la fabrication de corps à structure alvéolaire par extrusion d'une matière céramique. Le dispositif selon l'invention est remarquable par le fait qu'il est essentiellement conçu en une successison d'éléments coaxiaux emboîtés les uns autour des autres, que deux éléments adjacents définissent entre eux des canaux longitudinaux (2) débouchant en leur extrémité aval dans un canal annulaire (3), et que lesdits éléments coaxiaux emboîtés présentent, inférieurement et au niveau des canaux annulaires, des encoches (4) essentiellement rayonnantes et de largeur inférieure à la largeur des canaux longitudinaux, de sorte que la matière céramique s'écoulant par lesdits canaux longitudinaux soit régulièrement répartie dans les canaux annulaires et les encoches rayonnantes pour former directement à l'extrusion un corps à structure alvéolaire. Application aux structures céramique en nid d'abeilles à parois minces.
摘要:
A feeding apparatus for feeding a resistant filamentous element extending in the interior of flexible pipes manufac tured by means of extrusion machines of conventional type. The improvements consist in that the apparatus is coupled to the extrusion head of the machine and is provided with a tubular piece which cooperates in feeding the filamentous element which passes through the interior of the extrusion head into the interior of a conduit which traverses in a longitudinal direction the extrusion chamber coaxially there with, the said filamentous element coming out through the interior of the flexible pipe which is being formed and successively wound in order to facilitate storage.
摘要:
A feeding apparatus for feeding a resistant filamentous element extending in the interior of fiexibie pipes manufactured by means of extrusion machines of conventional type. The improvements consist in that the apparatus is coupled to the extrusion head of the machine and is provided with a tubular piece which cooperates in feeding the filamentous element which passes through the interior of the extrusion head into the interior of a conduit which traverses in a longitudinal direction the extrusion chamber coaxially therewith, the said filamentous element coming out through the interior of the flexible pipe which is being formed and successively wound in order to facilitate storage.
摘要:
The invention relates to a process and apparatus for producing a colored band in an extruded thermoplastic sheet. In the process, a probe is inserted in a sheet extrusion die manifold and a colored melt is injected into the polymer melt such that a sheet with an encapsulated colored band is obtained.