Patent ID: 8591218
Filing Date: 2013-11-26
Classification: B29C

Abstract:
1. An injection device in a molding machine, comprising: a cylinder including a pellet supply port; a cylinder-shaped plunger disposed in the cylinder and reciprocating in an axial direction thereof; a driving unit reciprocally moving the plunger in the axial direction; a melting instrument with a plurality of melting holes, which are cone-shaped passages, formed in a cylinder-shaped instrument body to communicate from inflow-side large openings to outflow-side small openings; a nozzle provided on an injection side of the cylinder; and a heating unit heating the melting instrument, wherein the melting instrument is disposed between the plunger and the nozzle, a face, on which the plurality of inflow-side large openings of the melting instrument are formed, is set as an inflow side face opposed to a tip-end of the plunger, and a face opposed to the nozzle on an opposite side to the inflow side face is set as an outflow side face, and a diameter of the tip-end of the plunger is set to be the same as a diameter of the outflow side face of the melting machine.