JP3921614B2 - Twin screw screw extruder - Google Patents

Description

  The present invention is, for example, a biaxial screw type extrusion molding used for compressing, reducing, and solidifying an object to be treated such as a general city waste containing a polymer and an industrial waste such as a waste plastic discharged from a business office. Related to the machine.

Conventionally, as this type of twin screw type extruder, a casing in which an input part for an object to be processed is provided on one side and a discharge part is provided on the other side, and the blades overlap each other in the casing Are provided in a pair of screw shafts arranged in a freely rotatable manner, a drive mechanism for rotating the pair of screw shafts in the occlusal direction, and a discharge portion of the casing, and are kneaded and compressed and transferred by the occlusal rotation of the pair of screw shafts. A structure comprising a die plate having a plurality of discharge port portions for discharging a workpiece, and a plurality of the discharge port portions provided in two annular regions facing each blade portion of the pair of screw shafts. Things are known.
Utility Model Registration No. 2567625

  However, in the case of the conventional structure, a plurality of the discharge port portions are provided in two annular regions facing each blade portion including the occlusion region where the blade portions of the pair of screw shafts overlap each other. When the workpiece to be kneaded and compressed by the occlusal rotation of the screw shaft is discharged from the plurality of discharge ports provided in the die plate, the workpiece is separated from the occlusal region where the blades overlap each other. Compared to the discharge port portion provided at the position, each blade portion is easy to be discharged from the discharge port portion provided in the occlusal region where it overlaps, and it becomes difficult to discharge gradually as it moves away along the rotation direction of the screw shaft. Due to this phenomenon, the discharge from each discharge port varies, resulting in a decrease in the processing efficiency of the object to be processed and discharged from the discharge port at the position where it is easily discharged. Article to be treated has the disadvantage that it may be difficult to solidify because the discharge flow velocity is fast.

The present invention aims to solve these disadvantages. Among the present inventions, the invention according to claim 1 is characterized in that an input portion for a workpiece is provided on one side and a discharge portion is provided on the other side. A pair of screw shafts rotatably arranged in a state where the blade portions overlap each other in the casing, a drive mechanism for rotating the pair of screw shafts in an occlusal direction, and the casing And a die plate having a plurality of discharge ports for discharging the workpiece to be kneaded and compressed and transferred by the occlusal rotation of the pair of screw shafts, the plurality of discharge ports being Provided in a complementary region excluding the occlusal region where the blades overlap each other from the two annular regions facing the blades of the pair of screw shafts, and the discharge ports at the plurality of discharge ports Discharged from the section That projected a discharge nozzle having a suitable length and suitable internal diameter for the solidification molding to ensure the cooling solidification molding time of the workpiece, further, the size with an appropriate length and appropriate internal diameter of the outlet nozzle A twin screw extruder is characterized in that different discharge nozzles are provided so as to be freely attachable and detachable, and further, a heater is provided on the die plate .

The invention according to claim 2 is characterized in that the die plate is provided with a bearing portion for bearing the protruding portions of the pair of screw shafts protruding from the die plate.

The invention described in claim 3 is characterized in that the number of rotations of the pair of screw shafts is variably provided.

As described above, according to the first aspect of the present invention, when an object to be processed is introduced into the casing from the input portion, the object to be processed is kneaded in the transfer space by the occlusal rotation of the pair of screw shafts in the casing. It is compressed and transferred, discharged from a plurality of outlets of the die plate, and heated while being reduced in volume by kneading compression transfer in the transfer space and frictional resistance by the die plate, The contained resin component is melted, the resin component becomes a binder, and the object to be processed is solidified and discharged from the discharge nozzle. At this time, the plurality of discharge port portions are connected to the pair of discharge ports. Positioned apart from the occlusal area where each wing part overlaps because it is provided in the complementary area excluding the occlusion area where each wing part overlaps from the two annular areas facing each wing part of the screw shaft Compared to the provided discharge port part, it is easy to be discharged from the discharge port part provided in the occlusal area where each blade part overlaps, and it becomes difficult to discharge gradually as it moves away in the rotation direction of the screw shaft. It can be avoided, variation in discharge from the discharge port of the object to be processed can be suppressed, and accordingly, the processing efficiency of the object to be processed can be increased and the process to be discharged from each discharge port. Products can have the same discharge flow rate, can be molded and solidified well at the discharge port, and the plurality of discharge ports can be cooled and solidified to be processed from the discharge port. Since the discharge nozzle having an appropriate length and an appropriate inner diameter for solidification molding for securing time is provided in a protruding manner, it is possible to secure a cooling and solidification molding time and perform solidification molding of the object to be processed satisfactorily. it can, further In addition, since the discharge nozzle is provided in a discharge nozzle having a different length and an appropriate inner diameter so as to be detachable, the flexibility to the specification and processing capability of the workpiece can be improved. Since the heater is provided on the substrate, the object to be processed can be reliably heated.

In the invention according to claim 2, since the bearing portion for bearing the projecting portions of the pair of screw shafts projecting from the die plate is provided on the die plate, the bearing and the bearing portion on the drive mechanism side are provided. The screw shaft can be supported in a state where both ends are supported, damage to the blade portion and the casing caused by rotation of the screw shaft can be suppressed, and power consumption can be reduced. In the invention, since the rotation speeds of the pair of screw shafts are variably provided, it is possible to increase the flexibility with respect to the specification and processing capacity of the object to be processed, and it is possible to achieve good volume reduction and solidification. .

  1 to 7 show an embodiment of the present invention. Reference numeral 1 denotes a casing, which is provided with an input portion 3 having an input port portion 2 for a workpiece W on one side and a discharge portion on the other side. 4 is provided, and a pair of screw shafts 5 and 6 are arranged in the casing 1 so as to be rotatable in parallel with mutually different spiral blade portions 5a and 6a overlapping each other. A transfer space T of the spiral workpiece W is formed between the front end of 6a and the bottom surfaces 5b and 6b.

  Reference numeral 7 denotes a drive mechanism, which comprises a motor 8, a speed reducer 9 and a gear mechanism 10 with variable rotation speeds. The pair of screw shafts 5 and 6 are directed downward from above in the direction of the arrows in FIG. It is comprised so that it may rotate in the occlusion direction F which is a different direction rotation of the inward direction.

  A die plate 11 is provided in the discharge part 4 of the casing 1 and has a plurality of discharges for discharging the workpiece W which is kneaded and compressed and transferred by the occlusal rotation of the pair of screw shafts 5 and 6 in the arrow direction. An outlet 12 is provided.

  In this case, as shown in FIG. 6, the discharge port portion 12 has the blade portions 5a and 6a overlapped from the two annular regions R and R facing the blade portions 5a and 6a of the pair of screw shafts 5 and 6, respectively. A total of 12 left and right 6 pieces are provided in the complementary region H excluding the occlusal region K. That is, in FIG. 7, a region having a shape obtained by combining two substantially C annular regions excluding the occlusal region K in the shaded portion from the two annular regions R and R is a complementary region H.

  Further, in this case, a mounting hole 12a having an inner diameter D is formed in the discharge port portion 12 of the die plate 11, and in order to secure a cooling and solidification molding time of the workpiece W discharged from the discharge port portion 12 in the mounting hole 12a. A discharge nozzle 13 having an appropriate length L and an appropriate inner diameter d for solidification molding is detachably protruded, and discharges of different sizes having an appropriate length L and an appropriate inner diameter d in common with an outer diameter matching the inner diameter D. The nozzle 13 is provided so as to be detachable and changeable.

  The die plate 11 is provided with a bearing portion 14 for bearing the protruding portions 5c and 6c of the pair of screw shafts 5 and 6 protruding from the die plate 11. In this case, the die plate 11 is provided with a slide bearing 11a. At the same time, the bearing portion 14 is provided with a rolling bearing 14a such as a ball bearing or a roller bearing.

  In this case, the die plate 11 is provided with a heater 15 and a thermocouple 16.

  Since this embodiment has the above-described configuration, when the workpiece W is thrown into the casing 1 from the throwing portion 3, the workpiece W is transferred into the transfer space by the occlusal rotation of the pair of screw shafts 5 and 6 in the casing 1. The workpiece W is kneaded and compressed and transferred from the plurality of discharge ports 12 of the die plate 11, and the workpiece W is heated while being reduced in volume by the kneading and compression transfer in the transfer space T and the frictional resistance by the die plate 11. By this heating, the resin component contained in the workpiece W is melted, and the resin component becomes a binder, and the workpiece W is solidified and discharged from the discharge nozzle 13 and discharged.

  At this time, the plurality of discharge ports 12 are connected to the occlusal region where the blades 5a and 6a overlap each other from the two annular regions R and R facing the blades 5a and 6a of the pair of screw shafts 5 and 6, respectively. Since each of the blade portions 5a and 6a overlaps with the discharge port portion 12 provided at a position away from the occlusion region K where the blade portions 5a and 6a overlap each other. It is possible to avoid the structural phenomenon that it is easy to be discharged from the discharge port portion 12 provided in the occlusal region K, and gradually becomes difficult to be discharged as the screw shafts 5 and 6 are separated along the rotation direction. Variations in the discharge of W from each discharge port 12 can be suppressed, and accordingly, the processing efficiency of the workpiece W can be increased, and the workpiece W discharged from each discharge port 12 is discharged at a flow velocity. To align Come, it can be performed well molded and solidified at the outlet portion 12.

  In this case, the discharge nozzle 12 has an appropriate length L for solidification molding and an appropriate inner diameter d for ensuring the cooling solidification molding time of the workpiece W discharged from the discharge port 12 to the discharge port 12. 13 is provided in a protruding manner, so that it is possible to secure a cooling and solidification molding time, and it is possible to satisfactorily solidify and mold the workpiece W. In this case, the die plate 11 is connected to the die plate 11 from the die plate 11. Since the bearing portion 14 for bearing the protruding portions 5c and 6c of the pair of screw shafts 5 and 6 protruding is provided, the screw shafts 5 and 6 are held in a state of being supported by the bearing and the bearing portion 14 on the drive mechanism 7 side. It can be supported, and damage to the blades 5a and 6a and the casing 1 due to the rotation of the core of the screw shafts 5 and 6 can be suppressed, and power consumption can be reduced.

  Further, in this case, the discharge nozzle 13 is provided on the discharge nozzle 13 having a different length L and an appropriate inner diameter d so as to be freely attachable and detachable. In this case, since the heater 15 is provided on the die plate 11, the workpiece W can be reliably heated. In this case, the pair of screw shafts 5, 6 can be used. Therefore, the flexibility of the workpiece W with respect to the specifications and the processing capability can be improved, and a good volume reduction and solidification can be performed.

  The present invention is not limited to the above-described embodiments, and the shape and size of the casing 1 and screw shafts 5 and 6, the structure of the discharge nozzle 13, the bearing portion 14, and the like are appropriately changed and designed. is there.

  As described above, the intended purpose can be sufficiently achieved.

1 is an overall side view of an embodiment of the present invention. It is the whole plane sectional view of the example of an embodiment of the invention. It is a fragmentary sectional side view of the example of an embodiment of the invention. 1 is an overall side view of an embodiment of the present invention. It is a whole side sectional view of an example of an embodiment of the invention. It is a partial expanded side sectional view of an example of an embodiment of the invention. It is explanatory drawing of the example of embodiment of this invention.

Explanation of symbols

W workpiece R annular region K occlusal region 1 casing 3 input part 4 discharge part 5 screw shaft 5a blade part 6 screw shaft 6a blade part 11 die plate 12 discharge port part 12a mounting hole 13 discharge nozzle 14 bearing part

Claims (3)

A casing in which an input part for an object to be processed is provided on one side and a discharge part is provided on the other side, and a pair of screw shafts that are rotatably arranged in parallel with the blades overlapping each other in the casing A plurality of drive mechanisms for rotating the pair of screw shafts in the occlusal direction, and a discharge unit of the casing for discharging the workpiece to be kneaded, compressed and transferred by the occlusal rotation of the pair of screw shafts. The die plate has a discharge port portion, and the plurality of discharge port portions are made up of two annular regions opposed to the respective blade portions of the pair of screw shafts except for the occlusal region where the respective blade portions overlap each other. Provided in the shape region, and having a suitable length and a suitable inner diameter for solidification molding in order to secure a cooling and solidification molding time of the object to be processed discharged from the discharge port portion at the plurality of discharge port portions. Discharge nozzle Projecting and further, the outlet different discharge nozzle detachably attached changing sizes with appropriate length and appropriate internal diameter of the nozzle, further, two axes, characterized by comprising providing a heater in the die plate Screw type extrusion molding machine.   2. The twin-screw extruder according to claim 1, wherein the die plate is provided with a bearing portion for bearing a protruding portion of the pair of screw shafts protruding from the die plate.   3. The twin-screw type extruder according to claim 1, wherein the number of rotations of the pair of screw shafts is variably provided.

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