TERMIUM Plus®

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MACHINE INJECTER VIS [1 record]

Record 1 1998-02-19

English

Subject field(s)
  • Plastics Manufacturing
OBS

There are about 80,000 injection-molding machines in about 8,000 plants in the United States. ... About 95% of the machine are either reciprocating screw or two-stage screws. The balance are plunger machines.

OBS

... preplasticizing machine. Of the equipment in use today, 95% is preplasticizing; either with a reciprocating screw or a screw-pot. In a reciprocating screw the melted material is collected in front of the screw, which continues to move backward against a controlled pressure as more material is melted. The area where the melted material is collected corresponds to the pot in a two-stage machine. When the screw is pushed forward by the hydraulic injection cylinder(s), a check valve (nonreturn valve) is closed. At this time the screw and nonreturn valve act like a plunger.

Key term(s)
  • screw-injection moulding machine
  • screw injection molding machine
  • reciprocating screw injection-moulding machine
  • screw molding machine
  • screw moulding machine
  • screw-molding machine
  • screw-moulding machine
  • reciprocating screw injection moulding machine

French

Domaine(s)
  • Plasturgie
CONT

La machine la plus utilisée est la presse à vis-piston. On parle alors de préplastification; en effet la vis assure ici deux fonctions : -fonction vis en tournant sur son axe : plastification de la matière de façon homogène, -fonction piston en avançant le long de son axe : matière poussée dans le moule par l'extrémité de la vis (qui joue le rôle de piston).

Spanish

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