Patent ID: 6309203
Filing Date: 2001-10-30
Classification: B29C

Abstract:
An injection apparatus for a motor-driven injection molding machine having a barrel unit configured to heat and plasticate polymer material, and a screw disposed in the barrel unit rotatably and movably in the axial direction, said apparatus comprising:a first rotating shaft having one end connected to a rear end of the screw:a second rotating shaft having a threaded rod portion;a threaded nut member engaging with the threaded rod portion;an injection carriage having a front plate for mounting the barrel unit thereon, and a rear plate fixed to the threaded nut member;an intermediate mount plate, disposed movably between the front plate and the rear plate, configured to link the first rotating shaft to the second rotating shaft coaxially with a predetermined distance spaced apart between the rear end of the first rotating shaft and the front end of the second rotating shaft;a charging motor for driving the first rotating shaft for rotation, and mounted on the intermediate mount plate, said charging motor having a rotor fitted coaxially with the first rotating shaft;an injection motor for driving the second rotating shaft for rotation, and mounted on the intermediate mountplate, said injection motor having a rotor fitted coaxially with the second rotating shaft.