摘要:
L'invention porte sur un procédé de fabrication d'une plaque alvéolaire, comportant deux parois de couverture espacées l'une de l'autre (12, 14) et reliées entre elles par des entretoises (16), par extrusion de matière plastique à travers une filière entre les lèvres de laquelle sont ménagés au moins deux canaux de laminage reliés par une pluralité de fentes ouvertes dans la direction d'extrusion, le procédé est caractérisé par le fait que les canaux de laminage sont alimentés indépendamment l'un de l'autre à partir de deux sources de matière distinctes, et les fentes sont alimentées à partir des canaux de laminage, en particulier les canaux de laminage sont alimentés par chacune par une extrudeuse. On permet ainsi la réalisation de plaques présentant des propriétés différentes, et dont le caractère est renforcé par l'emploi de matériaux choisis" L'invention porte aussi sur les plaques obtenues selon le procédé.
摘要:
Composite layer having a length and width and comprising a first plurality of repeating, three-dimensional structures having peaks and valleys, comprising a first polymeric material and a second plurality of repeating, three-dimensional structures having peaks and valleys that is adjacent to, and the inverse of, the first plurality of repeating, three-dimensional structures, and comprising a second polymeric material. There is a distance between adjacent peaks comprising the first polymeric material. There is an average of said distances between adjacent peaks comprising the first polymeric material. Any of said distances between adjacent peaks comprising the first polymeric material is within 20 percent of said average distance between adjacent peaks comprising the first polymeric material.
摘要:
Composite layer comprising a plurality of longitudinal, generally parallel first zones comprised of a first polymeric material each encapsulated in a second polymeric material. There are at least 10 longitudinal first zones per cm.
摘要:
Composite layer comprising a plurality of first zones of a first polymeric material partially encapsulated in a continuous matrix of a second polymeric material. All first zones of the first polymeric material have an exposed area on only one major surface of the composite layer.
摘要:
Extrusion die (30) comprising a plurality of shims (40a, 40b, 40c) positioned adjacent to one another, the shims (40a, 40b, 40c) together defining a first cavity, a second cavity, and a die slot, and methods of using the same. A variety of composite layers can be made from various dies described herein.
摘要:
The invention relates to the extrusion of tire components with a large change of gauge across their cross-sectional area. It is provided a method and an assembly (6) for extruding such a tire component with an extruder feeding a flow channel (2) with a downstream die opening (4), whereby a deflector (1) is provided in the flow channel (2)upstream the die opening (4) such that a flow of rubber is slowed down in front of broad portions of the cross-sectional area of the downstream die, avoiding distortion or bending of the extruded tire component.