초록 ▼

In a Hand-Held Extruder for polymeric materials such as elastomeric sealant compositions, an extruding barrel has, a material flow passage with an inlet for introducing the sealant material to be extruded into the material flow passage and a discharge outlet for discharging the sealant material, a t

In a Hand-Held Extruder for polymeric materials such as elastomeric sealant compositions, an extruding barrel has, a material flow passage with an inlet for introducing the sealant material to be extruded into the material flow passage and a discharge outlet for discharging the sealant material, a thermostatically controlled heating mechanism for adjustably controlling the heat of the extruding barrel to maintain the material being extruded in plastic condition, and a screw type conveyor rotatably mounted in the extruder barrel for moving the plastic sealant material from the inlet to the discharge outlet of the material flow passage, the screw conveyor is driven by any suitable power source coupled to a double planetary gear reduction transmission assembly so as to provide a counterclockwise rotation of the screw conveyor without reduction in torque to increase the troughput and discharge of material from the material flow passage. The extruding barrel has a hardened steel barrel liner to maintain the screw conveyor in proper alignment and to prevent eroding of the material flow passage wall.

대표청구항 ▼

A hand-held extruder comprising, a. main housing means including, a pistol grip section, and a double planetary gear assembly housing having, a first connecting means for connecting the double planetary gear assembly housing in alignment with the main housing means, and a reverse internally threaded

A hand-held extruder comprising, a. main housing means including, a pistol grip section, and a double planetary gear assembly housing having, a first connecting means for connecting the double planetary gear assembly housing in alignment with the main housing means, and a reverse internally threaded section at the end remote from said first connecting means, b. counterclockwise rotating driving means mounted in said main housing means, c. double planetary gear reduction means in said double planetary gear assembly housing operatively connecting at one end to said driving means and having a driven shaft and connector at the opposite end, d. front assembly means having a second connecting means for connecting said front assembly means to the reverse internally threaded connecting means on said double planetary gear assembly housing for alignment therewith and to prevent separation of the front assembly means from the double planetary gear assembly housing during operation of the extruder, e. said front assembly means including, outer housing means, and barrel means mounted in said front assembly means, f. said barrel means including, i. a material feeding passage extending end to end along the longitudinal line of said front assembly means, ii. means in said barrel means for heating material in said material feeding passage, iii. an inlet means in communication with said material feeding passage for charging material to be extruded into said material feeding passage, and an outlet means in communication with said material feeding passage a spaced distance from said inlet means for discharging heated material from said hand-held extruder, and iv. means for controlling the heating means on said barrel means, g. screw conveyor means rotatably mounted in the material feeding passage in said barrel means and extending out of said front assembly means at the end with the second connecting means thereon, h. said screw conveyor means connected at one end to and in alignment with said driven shaft on said double planetary gear reduction means, and i. said driving means, double planetary gear reduction means, driven shaft, and screw conveyor means so connected that during operation of said hand-held extruder the screw conveyor means is rotated counterclockwise at a predetermined number of revolutions per minute without reduction in torque of said driving means to increase the throughput and discharge of material from said material feeding passage at a predetermined rate.