Injecting unit for use in an injection molding machine

In an injecting unit for use in an injection molding machine, which unit comprises

• a carrying block,
• a plasticizing cylinder, which has a longitudinal axis and is axially movably mounted in said carrying block,
• a rotary feed screw motor having a rotatable profiled coupling section,
• a feed screw, which is rotatably mounted in said plasticizing cylinder and is axially movable relative to said plasticizing cylinder and is adapted to be relatively non-rotatably coupled to said profiled coupling section, and
• locking means for locking said plasticizing cylinder to said carrying block and for locking said feed screw in a coupling position to said profiled coupling section,
• the improvement residing in that said locking means comprise
• a stop, which is provided on said carrying block and axially faces said plasticizing cylinder,
• screw threads, which are formed on said plasticizing cylinder and are centered on said longitudinal axis,
• a nut, which is screwed on said screw threads and is rotatable in sliding engagement with said carrying block to axially move said plasticizing cylinder to said carrying block and has a periphery formed with engageable parts,
• drive means, engaging said engageable parts and operable to rotate said nut, and
• means for axially locking said feed screw in said coupling position to said profiled coupling section when said plasticizing cylinder has thus been locked to said carrying block.