Plastic extrusion device

Claim 2

An extrusion device for melting and extruding molten thermoplastic material comprising a body portion portion which includes a handle portion, an inlet end, a discharge end, an elongate channel extending from said inlet end to said discharge end for receiving a thermoplastic rod material, means for advancing said rod material through said passage when said rod material is introduced into the inlet end, an endpiece having an elongate passage therethrough which terminates with at least one discharge orifice, said endpiece including a liner member having said elongate passage therein, said liner member including a plurality of discharge passages which communicate with said elongate opening thereby forming a plurality of discharge orifices, each of said passages having a smaller cross-sectional size than that of the elongate passage, means at least partially surrounding said endpiece for heating said endpiece to a temperature of sufficient magnitude to melt said rod material when introduced into said elongate passage in the endpiece, and means for detachably connecting said endpiece to the discharge end of the device so that the elongate opening in the endpiece is aligned with the elongate passage in the body portion.

Claim 3

The combination of claim 1 wherein said liner member is formed of copper.

Claim 4

The combination of claim 1 wherein a tapered nozzle is secured to the discharge end of the endpiece.

Claim 5

An extrusion device for melting and extruding molten thermoplastic material comprising a body portion which includes a handle portion, an inlet end, a discharge end, an elongate channel extending from said inlet end to said discharge and for receiving a thermoplastic rod material, means for advancing said rod material through said passage when said rod material is introduced into the inlet end, an endpiece having an elongate passage therethrough which terminates with at least one discharge orifice, means at least partially surrounding said endpiece for heating said endpiece to a temperature of sufficient magnitude to melt said rod material when introduced into said elongate passage in the endpiece, said means comprising a tubular member which surrounds the endpiece, said member including a plurality of electrical conductors positioned within the member for supplying heat to the endpiece when the conductors are connected to a source of electrical energy, and means for detachably connecting said endpiece to the discharge end of the device so that the elongate opening in the endpiece is aligned with the elongate passage in the body portion.

Claim 6

An extrusion device for melting and extruding molten thermoplastic material comprising a body portion which includes a handle portion, an inlet end, a discharge end, an elongate channel extending from said inlet end to said discharge and for receiving a thermoplastic rod material, means for advancing said rod material through said passage when said rod material is introduced into the inlet end, an endpiece having an elongate passage therethrough which terminates with at least one discharge orifice, means at least partially surrounding said endpiece for heating said endpiece to a temperature of sufficient magnitude to melt said rod material when introduced into said elongate passage in the endpiece, said means comprising a tubular member which surrounds the endpiece, said member including a plurality of electrical conductors positioned within the member for supplying heat to the endpiece when the conductors are connected to a source of electrical energy, and means for detachably connecting said endpiece to the discharge end of the device so that the elongate opening in the endpiece is aligned with the elongate passage in the body portion.

Claim 7

The combination of claim 4 wherein the means for detachably connecting the endpiece to the extrusion device includes housing means interposed between said endpiece and the discharge end of the device.

Claim 8

The combination of claim 4 wherein the means for advancing the rod material through the device includes at least one roller adapted to engage the surface of the rod material and continuously move it longitudinally within the passage in the device, motor means forming a part of said extrusion device for causing said roller to rotate, means for energizing said motor means, and switch means for controlling the flow of electrical energy to said motor means.

Claim 9

The combination of claim 6 wherein said switch controls the flow of electrical energy to the motor means and to the means for heating the endpiece.

Claim 10

The combination of claim 7 wherein means are provided for controlling the temperature of the heater means between at least two different ranges.

Claim 11

The combination of claim 6 wherein a friction clUtch mechanism is provided for controlling the rotational speed of the roller, relative to he output speed of the motor means.

Claim 12

An extrusion device for melting and extruding molten thermoplastic material comprising a body portion which includes a handle portion, an inlet end, a discharge end, an elongate channel extending from said inlet end to said discharge end for receiving a thermoplastic rod material, means for advancing said rod material through said passage when said rod material is introduced into the inlet end, an endpiece having an elongate passage therethrough which terminates with at least one discharge orifice, means for heating said endpiece to a temperature of sufficient magnitude to melt said rod material when introduced into said elongate passage in the endpiece, said endpiece including a liner member having said elongate passage therein, said liner member including a plurality of discharge passages which communicate with said elongate opening thereby forming a plurality of discharge orifices, each of said passages having a smaller cross-sectional size then that of the elongate passage, said elongate passage terminating with a conically shaped cavity within the endpiece, each of the discharge passages communicating with said cavity, and means for detachably connecting said endpiece to the discharge end of the device so that the elongate opening in the endpiece is aligned with the elongate passage in the body portion.

Claim 13

An extrusion device for melting and extruding molten thermoplastic material comprising a body portion which includes a handle portion, an inlet end, a discharge end, an elongate channel extending from said inlet end to said discharge end for receiving a thermoplastic rod material, means for advancing said rod material through said passage when said rod material is introduced into the inlet end, an endpiece having an elongate passage therethrough which terminates with at least one discharge orifice, means for heating said endpiece to a temperature of sufficient magnitude to melt said rod material when introduced into said elongate passage in the endpiece, said endpiece including a liner member having said elongate passage therein, said liner member including a plurality of discharge passages which communicate with said elongate opening thereby forming a plurality of discharge orifices, each of said passages having a smaller cross-sectional size then that of the elongate passage, said elongate passage terminating with a conically shaped cavity within the endpiece, each of the discharge passages communicating with said cavity, and means for detachably connecting said endpiece to the discharge end of the device so that the elongate opening in the endpiece is aligned with the elongate passage in the body portion.

Claim 14

An extrusion device for melting and extruding molten thermoplastic material comprising a body portion which includes a handle portion, an inlet end, a discharge end, an elongate channel extending from said inlet end to said discharge end for receiving a thermoplastic rod material, means for advancing said rod material through said passage when said rod material is introduced into the inlet end, an endpiece having an elongate passage therethrough which terminates with at least one discharge orifice, means for heating said endpiece to a temperature of sufficient magnitude to melt said rod material when introduced into said elongate passage in the endpiece, said endpiece including a liner member having said elongate passage therein, said liner member including a plurality of discharge passages which communicate with said elongate opening thereby forming a plurality of discharge orifices, each of said passages having a smaller cross-sectional size then that of the elongate passage, an elongate tubular member which is operatively connected at one end to the liner member and at its other end to the discharge end of the device thereby aligning the passages in the liner member, the tubular member, and the discharge end of the device along a common line when the endpiece is secured to the discharge end of the extrusion device, and means for detachably connecting said endpiece to the discharge end of the device so that the elongate opening the endpiece is aligned with the elongate passage in the body portion.

Claim 15

An extrusion device for melting and extruding molten thermoplastic material comprising a body portion which includes a handle portion, an inlet end, a discharge end, an elongate channel extending from said inlet end to said discharge end for receiving a thermoplastic rod material, means for advancing said rod material through said passage when said rod material is introduced into the inlet end, an endpiece having an elongate passage therethrough which terminates with at least one discharge orifice, means for heating said endpiece to a temperature of sufficient magnitude to melt said rod material when introduced into said elongate passage in the endpiece, said endpiece including a liner member having said elongate passage therein, said liner member including a plurality of discharge passages which communicate with said elongate opening thereby forming a plurality of discharge orifices, each of said passages having a smaller cross-sectional size then that of the elongate passage, an elongate tubular member which is operatively connected at one end to the liner member and at its other end to the discharge end of the device thereby aligning the passages in the liner member, the tubular member, and the discharge end of the device along a common line when the endpiece is secured to the discharge end of the extrusion device, and means for detachably connecting said endpiece to the discharge end of the device so that the elongate opening the endpiece is aligned with the elongate passage in the body portion.

Claim 16

The combination of claim 11 wherein the cross-sectional size of the passage in the tubular member proximate the liner member is smaller than the passage at the opposite end of said tubular member.

Claim 17

An extrusion device for melting and extruding molten thermoplastic comprising a body portion which includes a handle portion, an inlet end, a discharge end, an elongate channel extending from said inlet end to said discharge end for receiving a thermoplastic rod material, means for advancing said rod material through said passage when said rod material is introduced to the inlet end, an endpiece having an elongate passage therethrough which terminates with at least one discharge orifice, means for heating said endpiece to a temperature of sufficient magnitude to melt said rod material when introduced into said elongate passage in the endpiece, and means for detachably connecting said endpiece to the discharge end of the device so that the elongate opening in the endpiece is aligned with the elongate passage in the body portion, saId means for detachably connecting the endpiece to the extrusion device including housing means interposed between said endpiece and the discharge end of the device, said endpiece being detachably connected to said housing means, and said housing being secured to the device.

Claim 18

An extrusion device for melting and extruding molten thermoplastic comprising a body portion which includes a handle portion, an inlet end, a discharge end, an elongate channel extending from said inlet end to said discharge end for receiving a thermoplastic rod material, means for advancing said rod material through said passage when said rod material is introduced to the inlet end, an endpiece having an elongate passage therethrough which terminates with at least one discharge orifice, means for heating said endpiece to a temperature of sufficient magnitude to melt said rod material when introduced into said elongate passage in the endpiece, and means for detachably connecting said endpiece to the discharge end of the device so that the elongate opening in the endpiece is aligned with the elongate passage in the body portion, saId means for detachably connecting the endpiece to the extrusion device including housing means interposed between said endpiece and the discharge end of the device, said endpiece being detachably connected to said housing means, and said housing being secured to the device.

Claim 19

An extrusion device for melting and extruding molten thermoplastic material comprising a body portion which includes a handle portion, an inlet end, a discharge end, an elongate channel extending from said inlet end to said discharge end for receiving a thermoplastic rod material, means for advancing said rod material through said passage when said rod material is introduced into the inlet end, an endpiece having an elongate passage therethrough which terminates with at least one discharge orifice, means for heating said endpiece to a temperature of sufficient magnitude to melt said rod material when introduced into said elongate passage in the endpiece, and means for detachably connecting said endpiece to the discharge end of the device so that the elongate opening in the endpiece is aligned with the elongate passage in the body portion, said means for detachably connecting the endpiece to the extrusion device including housing means interposed between said endpiece and the discharge end of the device, said housing means being detachably connected to the device, and said endpiece being secured to said housing.

Claim 20

An extrusion device for melting and extruding molten thermoplastic material comprising a body portion which includes a handle portion, an inlet end, a discharge end, an elongate channel extending from said inlet end to said discharge end for receiving a thermoplastic rod material, means for advancing said rod material through said passage when said rod material is introduced into the inlet end, an endpiece having an elongate passage therethrough which terminates with at least one discharge orifice, means for heating said endpiece to a temperature of sufficient magnitude to melt said rod material when introduced into said elongate passage in the endpiece, and means for detachably connecting said endpiece to the discharge end of the device so that the elongate opening in the endpiece is aligned with the elongate passage in the body portion, said means for detachably connecting the endpiece to the extrusion device including housing means interposed between said endpiece and the discharge end of the device, said housing means being detachably connected to the device, and said endpiece being secured to said housing.