摘要:
A polymer melt candle filter having a support which comprises a hollow cylindrical body defined by a first end, a second end, and a cylinder wall having a first end portion and a second end portion. The first end portion includes a screw thread on its outside surface and optionally a hex fitting on its inside surface for receiving a hex wrench. The second end portion includes a plurality of holes in the cylinder wall. The area of the openings of the holes on the outside surface of the cylinder wall may be larger than the area of the openings of the corresponding holes on the inside surface of the cylinder wall. The shape of the openings of the holes on the outside surface may be non-circular. A polymer melt filter plate assembly which comprises (a) a support plate comprising a plurality of threaded holes; (b) at least one filter which is screwed into at least one of the threaded holes via the screw thread on the outside surface of the first end portion of the filter support; (c) a tie rod with (i) a first end extending through a hole in a cone insert and a cap located at the second end of the filter support, and (ii) a second end extending through a threaded hole in the support plate; and (d) a cross bar which is attached to the second end of the tie rod for holding the support plate inside a shaft of an apparatus for filtering a polymer melt.
摘要:
A raw material quantity is supplied by a supply unit along a trajectory through a supply opening into the production machine. The trajectory of the raw material quantity is changeable. A supply unit for supplying a raw material quantity into a production machine comprises a supply channel portion having an exit opening and a feed hopper. The supply unit has at least one actuating unit, by which an actuating movement of the supply channel portion and/or of the feed hopper can be generated, so that the supply channel portion can be displaced relative to the feed hopper. A raw material mixture is supplied to the extrusion machine by the moved supply unit. In this way it is possible to supply the raw material mixture into the extrusion machine in a particularly uniform manner so that the raw material mixture can be processed by means of the extrusion machine.
摘要:
Improvements in the extrusion of thermohardenable materials are achieved by cooling the material in the initial zone of the extruder and reducing residence time by use of a prescribed length to diameter ratio and screw speed, particularly useful for intermittent application during robotically controlled mass production.
摘要:
A synthetic resin worm press in which the thread height in an intake zone adjoining a feed opening zone is substantially smaller than the thread height in the feed opening zone, a frustoconical divergent transition piece is provided between the two zones at the core of the worm and longitudinal grooves are formed in the wall of the bore along these zones and are of progressively decreasing depth in the flow direction of the material.
摘要:
A method of replastifying thermoplastic foil strips comprising the steps of: rotating a worm within a cylinder baffel having a chamber, an inlet end, outlet end, and a widened area in the region of the inlet end; winding at least one continuous thermoplastic foil strip in multiple layers completely around the worm in the widened area; compressing the layers of the at least one strip on the worm; snagging the at least one strip wound on the worm on edges of at least one longitudinal groove formed on a wall of the chamber, thereby causing the at least one strip to be cut into pieces; and advancing the pieces from the chamber by rotation of the worm.
摘要:
Certain portions of the discharge slots of an existing extrusion die for forming honeycomb structures are blocked off by selectively positioning a plurality of tabs within such discharge slots so as to convert the cellular configuration originally formed by the discharge slots of such die to that of a desired cellular configuration.
摘要:
Apparatus suitable for protecting a spinneret in a spinneret pack comprises a plate and attaching means connected to the plate suitable for temporarily securing the plate to the spinneret pack so that the plate substantially covers the spinneret face.
摘要:
The provision of a durable, slick sliding surface on metal faces of plastic forming extrusion apparatus such as extruder nozzles and dies. The durable, slick sliding metal surface is provided by burnishing and heat treating a polysiloxane fluid on the face of the metal. The burnishing comprises vigorous rubbing of the polysiloxane fluid treated metal face with a material relatively softer than the metal face being treated, effectively over the entire surface treated.