JP2015009368A - Extruder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an extruder which reduces the moisture content of raw material.SOLUTION: An extruder includes a base 10, a cylinder 20, a screw 30, a cylindrical feeder 40, a control valve 50, and a vacuum device 60. The cylinder 20 has a long and narrow tubular shape, is fixed to the base 10 at one end thereof, and includes a feed part 21 located near the base 10, an inlet 22 arranged in the feed part 21, and an outlet 23 arranged at the other end of the cylinder 20. The screw 30 is accommodated in the cylinder 20, is connected to the base 10 at one end thereof, and is driven by an external force to rotate in the cylinder 20. The top and bottom of the cylindrical feeder 40 are formed with through holes 42 and 41, respectively, and the through hole 41 in the bottom is connected to the inlet 22 of the cylinder 20 by a duct. The control valve 50 is installed in the through hole 42 in the top of the cylindrical feeder 40 and controls opening and closing of the cylindrical feeder 40.

Description

  The present invention relates to an extruder, and more particularly to an extruder having a supply device for supplying a vacuum.

  The screw of the conventional extruder has a feeding part, a kneading part, and a carrying-out part. Some extruders have one or two exhaust ports in the kneading section. The exhaust vent discharges moisture from the plastic material. On the other hand, wastes collected from plastic bags or wraps contain a lot of moisture after being washed. Even if dehydration and drying processes are performed, moisture between the wraps cannot be completely removed and dried, so when the melting and kneading process proceeds, a large amount of water vapor is generated, and plastic materials such as plastic bags Mixed with. At this time, it is a disadvantage of the conventional extruder that the water vapor cannot be completely discharged even if it goes through the exhaust port.

  The main object of the present invention is to provide an extruder that reduces the water content of the raw material in order to overcome the above-mentioned drawbacks.

  Another object of the present invention is to provide an extruder that can carry in raw materials more smoothly.

  To achieve the above object, an extruder according to the present invention comprises a base, a cylinder, a screw, a cylindrical feeder, a control valve, and a vacuum device. The cylinder has an elongated tubular shape. One end of the cylinder is fixed to the base. The cylinder has a feed portion located near the base, an inlet disposed at the feed portion, and an outlet disposed at the other end. The screw is accommodated in the cylinder, one end of which is connected to the base, is driven by an external force, and rotates in the cylinder. The cylindrical feeder has through holes at the top and bottom, and the bottom through hole is connected to the inlet of the cylinder by a conduit. The control valve is provided in a through hole at the top of the cylindrical feeder and controls the opening and closing of the cylindrical feeder. The vacuum device is provided in the feed part of the cylinder by a pipe line, and the air in the feed part can be completely extracted.

It is a schematic diagram which shows the structure of the extruder by 1st Embodiment of this invention. It is a front view which shows the extruder by 2nd Embodiment of this invention. It is a top view which shows the extruder by 2nd Embodiment of this invention. It is a schematic diagram which shows the structure of the extruder by 2nd Embodiment of this invention. It is a horizontal sectional view which shows the support seat of the extruder by 2nd Embodiment of this invention, and the feed part of a cylinder. FIG. 6 is a sectional view taken along line 6-6 of FIG.

Hereinafter, an extruder according to an embodiment of the present invention will be described with reference to the drawings.
(First embodiment)
As shown in FIG. 1, the extruder according to the first embodiment of the present invention employs a system that automatically carries a raw material by gravity, and includes a base 10, a cylinder 20, a screw 30, a cylindrical feeder 40, and a control valve 50. And a vacuum device 60.

  The cylinder 20 has an elongated tubular shape, is fixed to the base 10 at one end, and is located at a portion close to the base 10, an inlet 22 disposed at the feed portion 21, and an outlet (at the other end). (Not shown in the figure).

  The screw 30 is housed in the cylinder 20 and is driven by an external force when one end is connected to the base 10 to rotate in the cylinder 20.

  The cylindrical feeder 40 has a through hole 42 located at the top and a through hole 41 located at the bottom, and the bottom through hole 41 is connected to the inlet 22 of the cylinder 20.

  The control valve 50 is arranged in the through hole 42 at the top of the cylindrical feeder 40 to control the opening and closing of the cylindrical feeder 40.

  The vacuum device 60 is connected to the feed unit 21 of the cylinder 20 by the pipe 61 and completely extracts the air from the feed unit 21.

  In the present embodiment, the screw 30 further has a groove 31 at the connection end with the cylinder 20. The cylinder 20 has a hole 23 at a position corresponding to the groove 31. The vacuum device 60 is connected to the hole 23 by a pipe 61 and is connected to the feed portion 21 of the cylinder 20 by a gap formed at a connection portion between the screw 30 and the base 10. The base 10 has an O-shaped ring 11 and a V-shaped washer 12 at the connection end with the screw 30 to prevent leakage. The base 10 has a gear inside. The gear can rotate the screw by the driving force of the motor. (Not shown in the figure)

  In the present embodiment, a hopper or a raw material supply conduit (not shown in the drawing) can be further disposed above the control valve 50. When the work is performed, the control valve 50 is opened and the raw material is dropped into the cylindrical feeder 40. When the raw material in the cylindrical feeder 40 reaches the set height, the control valve 50 is automatically turned off. Since the vacuum device 60 continuously extracts air all the time, the raw material in the cylindrical feeder 40 is automatically dropped into the feeding portion 21 of the cylinder 20 by the double action of gravity and suction force. At this time, since the air is completely extracted from the raw material in the cylindrical feeder 40 and the feeding unit 21, the moisture is easily evaporated, and the water vapor is extracted together with the air. Therefore, the water content of the raw material can be greatly reduced, and the production rate and quality can be increased.

(Second Embodiment)
As shown in FIGS. 2 to 6, the extruder according to the second embodiment of the present invention employs a method for forcibly carrying the raw material. For the sake of explanation, the same parts as those in the first embodiment are denoted by the same reference numerals. The extruder according to the second embodiment includes a base 10, a cylinder 20, a screw 30, a cylindrical feeder 40, a control valve 50, and a vacuum device 60. The structure and connection relation of the parts are the same as the contents presented by the first embodiment and are as follows.

  The cylinder 20 has a feed portion 21 and an inlet 22. The screw 30 has a groove 31. The cylinder 20 has a hole 23 at a position corresponding to the groove 31. The vacuum device 60 is connected to the hole 23 by a conduit 61. Differences from the first embodiment are as follows. In the present embodiment, the cylindrical body feeder 40 has a forced feed screw 70 inside. The forced feed screw 70 forcibly feeds the raw material into the feed portion 21 of the cylinder 20. The cylinder 20 has a support seat 80 on the side of the feed portion 21. The support seat 80 is used to connect the forced feed screw 70. The cylindrical feeder 40 is attached to the support seat 80. The support seat 80 has a storage groove 81 inside. The storage groove 81 is connected to the inlet 22 of the cylinder 20. That is, the inlet 22 is positioned on the side of the cylinder 20. The control valve 50 has a raw material storage cylinder 90 on the upper side. The raw material storage cylinder 90 is connected to an upper transportation pipeline 95.

  On the other hand, the cylindrical feeder 40 has a sensor 43 for detecting the position of the raw material below. The raw material storage cylinder 90 has a sensor 91 for detecting the position of the raw material. When the raw material in the cylindrical feeder 40 has not reached the detection position of the sensor 43, the control valve 50 is automatically opened, and the raw material in the upper raw material storage cylinder 90 is placed in the cylindrical feeder 40 according to the time setting. It is automatically dropped, and then the control valve 50 is automatically turned off, and the cylindrical feeder 40 is sealed. At the same time, the transport pipe 95 is activated to feed the raw material into the raw material storage cylinder 90. When the raw material reaches the detection position of the sensor 91 of the raw material storage cylinder 90, the transportation pipeline 95 is automatically shut off. At this time, since the raw material in the cylindrical feeder 40 is quickly evaporated and extracted by the action of the vacuum device 60, not only can the raw material be dried, but also the raw material can be carried in and subsequent processing operations can be performed. It can proceed smoothly.

  As mentioned above, this invention is not limited to the said embodiment at all, In the range which does not deviate from the meaning of invention, it can implement with a various form.

10: Base,
11: O-type ring,
12: V-shaped washer,
20: cylinder,
21: Feeder,
22: Entrance,
23: hole,
30: Screw,
31: groove part,
40: cylindrical feeder,
41: through hole,
42: through-hole,
43: Sensor,
50: control valve,
60: Vacuum device,
61: pipeline,
70: Force feed screw,
80: support seat,
81: storage groove,
90: Raw material storage cylinder,
91: sensor,
95: Transport pipeline.

The cylinder 20 has a feed portion 21 and an inlet 22. The screw 30 has a groove 31. The cylinder 20 has a hole 23 at a position corresponding to the groove 31. The vacuum device 60 is connected to the hole 23 by a conduit 61. Differences from the first embodiment are as follows. In the present embodiment, the cylindrical feeder 40 has a forced feed screw 70 therein. The forced feed screw 70 forcibly feeds the raw material into the feed portion 21 of the cylinder 20. The cylinder 20 has a support seat 80 on the side of the feed portion 21. The support seat 80 is used to connect the forced feed screw 70. Cylindrical feeder 40 is mounted on a support seat 80. The support seat 80 has a storage groove 81 inside. The storage groove 81 is connected to the inlet 22 of the cylinder 20. That is, the inlet 22 is positioned on the side of the cylinder 20. The control valve 50 has a raw material storage cylinder 90 on the upper side. The raw material storage cylinder 90 is connected to an upper transportation pipeline 95.

On the other hand, the cylindrical feeder 40 has a sensor 43 for detecting the position of the material downward. The raw material storage cylinder 90 has a sensor 91 for detecting the position of the raw material. When the raw material of the cylindrical feeder 40 has not reached the detection position of the sensor 43, the control valve 50 automatically is opened, the raw material of the upper material storage accommodating cylinder 90 to the cylindrical feeder 40 according to the time set automatically dropped, After that automatically turns off the control valve 50, and at the same time to seal the cylindrical feeder 40, to start the pipeline 95, feeding the raw material to the raw material storage accommodating cylinder 90. When the raw material reaches the detection position of the sensor 91 of the raw material storage cylinder 90, the transportation pipeline 95 is automatically shut off. In this case the raw material of the cylindrical feeder 40 is water rapidly evaporated by the action of the vacuum apparatus 60, since the withdrawn, not only can improve the drying degree of the raw material, the raw material Hakobikomi and subsequent machining operations It can proceed smoothly.

Claims (8)

A base, a cylinder, a screw, a cylindrical feeder, a control valve, and a vacuum device;
The cylinder has an elongated tubular shape, one end of which is fixed to the base, and has a feed portion located in the vicinity of the base, an inlet disposed in the feed portion, and an outlet disposed at the other end. ,
The screw is accommodated in the cylinder, one end is connected to the base, and is driven by an external force to rotate in the cylinder.
The cylindrical feeder has a through hole formed at the top and bottom, and the through hole at the bottom is connected to the inlet of the cylinder by a pipe line,
The control valve is provided in a through hole at the top of the cylindrical feeder, and controls opening and closing of the cylindrical feeder,
The said vacuum apparatus is provided in the said feed part of the said cylinder by the pipe line, and can extract the air of the said feed part completely, The extruder characterized by the above-mentioned.   The said vacuum apparatus is connected to the said base by the pipe line, and is connected to the feed part of the said cylinder by the clearance gap formed in the connection part of the said screw and the said base. Extruder. The screw has a groove at an end connected to the cylinder,
The cylinder has a hole at a position corresponding to the groove,
3. The vacuum device according to claim 2, wherein the vacuum device is connected to the hole by a pipe line, and is connected to a feed portion of the cylinder by a gap formed in a connection portion between the screw and the base. The extruder described. The control valve is provided with a raw material storage cylinder above,
The extruder according to claim 1, wherein the raw material storage cylinder is connected to an upper transportation pipeline. The cylindrical feeder is provided with a forced feed screw inside,
The extruder according to claim 1, wherein the forced feed screw forcibly feeds a raw material into a feed portion of the cylinder. The cylinder is provided with a support seat on the side of the feed part,
The support seat is used for connection with the forced feed screw,
The cylindrical feeder is attached to the support seat,
The support seat has a housing groove formed therein,
The extruder according to claim 5, wherein the receiving groove is connected to the inlet of the cylinder. The cylindrical feeder is provided with a sensor for detecting the position of the raw material below,
The extruder according to claim 4, wherein the raw material storage cylinder is provided with a sensor for detecting the position of the raw material on the upper side.   The extruder according to claim 1, wherein the base is provided with an O-shaped ring and a V-shaped washer at an end connected to the screw.

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