Plasticizing apparatus for a pre-plasticization-type injection molding machine
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United States of America Patent
Stats
-
Mar 18, 2003
Grant Date -
Jan 17, 2002
app pub date -
Oct 13, 1999
filing date -
Oct 20, 1998
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A plasticizing apparatus used for a pre-plasticization-type injection molding machine is equipped with a screw drive section which comprises a rotational drive section supported in an axially moveable manner and adapted to rotate the screw; and an advancement/retraction drive section including a servomotor and a ball-screw mechanism for converting rotational motion of the servomotor to linear motion in order to axially move the rotational drive section. By virtue of the above-described structure, the screw disposed within the barrel is rotated by the rotational drive section of the screw drive section, so that the molding material within the barrel is plasticized (melted) and is then supplied to the injection apparatus. Further, the rotational drive section (screw) is advanced and retracted by the advancement/retraction section of the screw drive section, so that the resin passage of the barrel is opened and closed in accordance with the position of the screw.
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