Patent ID: 9616604
Date: 2017-04-11
CPC Classifications: B23P,B29C

Claim:
1. An injection device comprising: a heating cylinder; a two-piece nozzle comprising: a nozzle adaptor threadedly attached to a tip of the heating cylinder, the nozzle adaptor having an outer peripheral wrench-engagement part configured to be gripped by a wrench; and a nozzle body threadedly attached to a tip of the nozzle adaptor, the nozzle body having a key seat formed in an outer peripheral surface thereof and extending in an axial direction thereof, an insertion hole extending from a bottom of the key seat, and a longitudinal groove formed in the outer peripheral surface and extending continuously from an end of the key seat in the axial direction; a thermocouple for measuring a temperature of the nozzle body, the thermocouple being received in the key seat and the longitudinal groove of the nozzle body; and a heater fitted over the nozzle body for heating the nozzle body and serving as a stopper that prevents the thermocouple from coming off from the key seat and the longitudinal groove of the nozzle body; wherein the insertion hole of the nozzle body extends in a radial inward direction of the nozzle body, the longitudinal groove of the nozzle body has a depth smaller than a depth of the key seat, and the thermocouple has an end portion inserted in the insertion hole.