Extruder and exhaust frame

Abstract

Provided is a technique for preventing foreign matter caused by liquid droplets (300) contained in a gas (200) from clogging a pipe (40) connected to an exhaust unit (VU). An exhaust unit (VU) provided for discharging a gas (200) generated in a cylinder (10) of an extruder, wherein the exhaust unit (VU) has trapping plates (500A-500D) for trapping droplets (300) contained in the gas (200).

Description

Technical Field

[0001] The present invention relates to an extruder and an exhaust housing, and more particularly, to a technique effectively applicable to an extruder and an exhaust housing capable of capturing droplets contained in the gas discharged from the extruder. Background Art

[0002] Japanese Patent Application Laid-Open No. 2022-71945 (Patent Document 1) discloses a technique in which a sidevent stuffer that can push back the raw material ejected together with the pyrolysis gas into the extruder and discharge the pyrolysis gas to the outside of the extruder is used to discharge the pyrolysis gas from the extruder.

[0003] Prior Art Documents

[0004] Patent Documents

[0005] Patent Document 1: Japanese Patent Application Laid-Open No. 2022-71945 Summary of the Invention

[0006] Problems to be Solved by the Invention

[0007] An extruder is configured to supply a raw material from a hopper into a cylinder, and knead and convey the supplied raw material using a screw provided inside the cylinder, and finally extrude the kneaded product. In an extruder configured in this way, gas is generated from the raw material when the raw material is kneaded and conveyed using the screw, and therefore an exhaust portion for discharging the gas is provided in the cylinder. Here, the exhaust portion is connected to a pipe, and the gas generated from the raw material is discharged from the exhaust portion through the pipe.

[0008] The gas discharged from the exhaust portion sometimes contains droplets blown out together with the gas. The droplets contain, for example, oil and low-viscosity resin, and the droplets also enter the pipe from the exhaust portion together with the gas. In this case, the droplets adhere to the inside of the pipe and solidify, and thus foreign matter accumulates inside the pipe. As a result, if the foreign matter accumulated inside the pipe increases, the pipe may be blocked. Therefore, in order to prevent the pipe from being blocked, it is desirable to prevent the droplets that cause the foreign matter from entering the inside of the pipe.

[0009] Means for Solving the Problems

[0010] An extruder in one embodiment includes: a cylinder having a screw inside; and an exhaust portion that discharges the gas generated inside the cylinder. Among them, the exhaust portion has a capture plate that captures droplets contained in the gas.

[0011] An exhaust housing in one embodiment is an exhaust housing configured to be attachable to an extruder and discharge the gas generated inside the extruder. The exhaust housing has a capture plate that captures droplets contained in the gas.

[0012] In other words, the exhaust housing in one embodiment is configured to be connectable to a cylinder having a screw therein and to exhaust the gas generated in the cylinder. At this time, the exhaust housing has a capture plate for capturing droplets contained in the gas.

[0013] Effects of the Invention

[0014] According to one embodiment, it is possible to suppress droplets contained in the gas from entering the pipe through the exhaust portion provided in the extruder. Therefore, according to one embodiment, it is possible to prevent the pipe connected to the exhaust portion from being clogged with foreign matter caused by the droplets. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a diagram schematically showing the configuration of an extruder.

[0016] Figure 2 is a schematic diagram showing the configuration of an exhaust portion in the related art.

[0017] Figure 3 is a diagram illustrating an embodiment mode in which the basic concept is embodied.

[0018] Figure 4 is a schematic diagram showing a specific example of the exhaust portion. In particular, (a) is a perspective view showing the overall configuration of the exhaust portion, and (b) is a partial cross-sectional view of the exhaust portion.

[0019] Figure 5 is a diagram schematically showing a baffle. In particular, (a) is a schematic diagram showing the inside of the baffle, and (b) is a schematic diagram showing the external configuration of the baffle.

[0020] Figure 6 is a partial cross-sectional view showing the configuration in which the baffle is assembled to the exhaust portion.

[0021] Figure 7 is a diagram illustrating an example of the length of the capture plate.

[0022] Figure 8 is a diagram illustrating another example of the length of the capture plate.

[0023] Figure 9 is a diagram illustrating an example of the arrangement angle of the capture plate.

[0024] Figure 10 is a diagram illustrating another example of the arrangement angle of the capture plate.

[0025] Figure 11 is a diagram schematically showing the configuration of the exhaust portion in Modification 1.

[0026] Figure 12This is a diagram schematically showing the configuration of the exhaust section in Modification 2. Detailed Embodiment

[0027] In all the drawings used to illustrate the embodiments, the same reference numerals are, in principle, assigned to the same components, and redundant descriptions thereof are omitted. It should be noted that, for ease of understanding the drawings, hatching is sometimes added even to the plan views.

[0028] <Configuration of Extruder>

[0029] Figure 1 This is a diagram schematically showing the configuration of the extruder 100.

[0030] In Figure 1 this, the extruder 100 includes a cylinder 10, a hopper 20, a rotary drive mechanism 30, and an exhaust section VU.

[0031] The cylinder 10 is composed of a plurality of cylinder blocks. A screw is disposed inside the cylinder 10 and configured to be rotatable by the rotary drive mechanism 30. In addition, the exhaust section VU is attached to the cylinder 10. The exhaust section VU is connected to a vacuum pump 50 via a pipe 40, for example. Further, the cylinder 10 is connected to the hopper 20, and the hopper 20 functions as a raw material supply port for supplying raw materials into the cylinder 10.

[0032] In the extruder 100 configured in this way, when raw materials are supplied to the hopper 20, the raw materials are fed into the cylinder 10. The raw materials fed into the cylinder 10 are kneaded by the screw provided inside the cylinder 10. Specifically, the raw materials fed into the cylinder 10 are kneaded by the screw rotated by the rotary drive mechanism 30 and are transported as a kneaded product from the upstream to the downstream of the cylinder 10.

[0033] At this time, gas is generated from the kneaded product. After the generated gas flows into the exhaust section VU attached to the cylinder 10, it is discharged from the exhaust section VU via the pipe 40. For example, a vacuum pump 50 is connected to the pipe 40, and by operating the vacuum pump 50, the gas generated from the raw materials is discharged to the outside of the cylinder 10 through the path of the inside of the cylinder 10 → the exhaust section VU → the pipe 40.

[0034] <Description of Related Art>

[0035] Next, the related art related to the structure of the exhaust section VU will be described.

[0036] The "related art" in this specification is not a publicly known technique, but a technique having the problems discovered by the inventors of the present application and is a technique that is a prerequisite for the invention of the present application.

[0037] Figure 2It is a schematic diagram showing the configuration of the exhaust section VU1 in the related art.

[0038] In Figure 2 inside the cylinder block 10 which is a component of the extruder, a screw 11A and a screw 11B are arranged, and the screw 11A and the screw 11B are rotated by the Figure 1 shown rotary drive mechanism 30.

[0039] Next, an exhaust section VU1 is installed on the cylinder block 10. Specifically, the exhaust section VU1 is composed of a frame (exhaust box) 12 having an internal space 13, and the frame 12 is installed on the extruder in such a way that the opening OP provided on the cylinder block 10 is connected to the internal space 13. And an exhaust port 12A is provided on the side surface of the frame 12, and the exhaust port 12A is connected to a pipe 40.

[0040] In the related art configured in this way, by using the Figure 1 shown rotary drive mechanism 30 to rotate the screw 11A and the screw 11B, the raw material supplied from the Figure 1 shown hopper 20 is kneaded to become a kneaded product 150. At this time, gas 200 is generated from the kneaded product 150 and an entrainment phenomenon occurs. The entrainment phenomenon refers to the phenomenon that droplets 300 splash along with the flow of the gas 200, and the droplets 300 blown out along with the gas 200 include, for example, oil and low-viscosity resin.

[0041] The gas 200 containing the droplets 300 generated from the kneaded product 150, as Figure 2 shown, after flowing into the internal space 13 of the frame 12 from the opening OP formed on the cylinder block 10, is discharged to the outside through the exhaust port 12A provided on the side surface of the frame 12 via the pipe 40.

[0042] As described above, according to the exhaust section VU1 in the related art, the gas 200 containing the droplets 300 generated inside the cylinder block 10 can be discharged from the cylinder block 10 to the outside of the extruder.

[0043] Here, in the related art, as Figure 2 shown, not only the gas 200 but also the droplets 300 contained in the gas 200 enter the pipe 40. As a result, the droplets 300 adhere to the inner wall of the pipe 40 and solidify, so that foreign matter 300A accumulates on the inner wall of the pipe 40. Thus, if the accumulation amount of the foreign matter 300A increases, the pipe 40 may be blocked. That is to say, in the related art, since not only the gas 200 but also the droplets 300 contained in the gas 200 enter the pipe 40 in a large amount from the exhaust port 12A of the exhaust section VU1, the foreign matter 300A accumulates in the pipe 40, and as a result, the pipe 40 may be blocked. In other words, from the viewpoint of avoiding the blockage of the pipe 40, there is room for improvement in the related art.

[0044] Therefore, in the present embodiment, a study has been conducted on overcoming the room for improvement existing in the related art. Hereinafter, the technical concept in the present embodiment studied will be described.

[0045] <Basic Concept in the Embodiment>

[0046] The basic concept in the present embodiment is that in an exhaust portion provided for discharging the gas generated in the cylinder of an extruder, the exhaust portion has a capture plate for capturing the droplets contained in the gas. Thus, according to the basic concept, the droplets contained in the gas flowing from the cylinder into the exhaust portion adhere to the capture plate, and as a result, it is possible to suppress the droplets from entering the pipe through the exhaust port of the exhaust portion. Thus, according to the basic concept, since the accumulation of foreign matter due to the droplets adhering to the inner wall of the pipe and solidifying is suppressed, a remarkable effect of preventing the pipe from being clogged due to the accumulation of foreign matter can be obtained.

[0047] In this way, the basic concept is a concept of removing droplets in the exhaust portion before the droplets enter the pipe through the exhaust port of the exhaust portion, and this concept is realized by providing a capture plate in the internal space of the frame constituting the exhaust portion. That is, the capture plate is arranged so that the gas containing droplets flowing from the cylinder into the internal space of the frame intentionally contacts the capture plate. Thus, when the gas containing droplets contacts the capture plate, the droplets contained in the gas adhere to the capture plate, and thus the droplets can be removed from the gas. And since the gas from which the droplets have been removed by the capture plate is discharged from the exhaust port provided in the frame to the pipe, the droplets are suppressed from entering the pipe, and as a result, the pipe clogging caused by the droplets is prevented.

[0048] Hereinafter, the embodiment mode for embodying this basic concept will be described.

[0049] <Embodiment Mode>

[0050] Figure 3 It is a diagram for explaining the embodiment mode for embodying the basic concept.

[0051] In Figure 3 , a screw 11A and a screw 11B are arranged inside a cylinder 10 which is a component of an extruder, and the screw 11A and the screw 11B are configured to rotate by Figure 1 the rotation drive mechanism 30 shown.

[0052] Next, an exhaust section VU is installed on the cylinder block 10. Specifically, the exhaust section VU is composed of a housing (exhaust box) 12 having an internal space 13, and the housing 12 is installed on the extruder in such a manner that the opening OP provided on the cylinder block 10 is connected to the internal space 13. Further, the housing 12 has an opposing surface (upper surface) opposing the opening OP provided on the cylinder block 10, and an exhaust port 12B is provided on the opposing surface. This exhaust port 12A is connected to a pipe 40. In addition, in the embodiment, a plurality of capture plates 500A to 500D are provided in the internal space 13 of the housing 12 which is a component of the exhaust section VU.

[0053] In the embodiment configured in this way, by rotating the screw 11A and the screw 11B using Figure 1 the rotary drive mechanism 30 shown, the raw material supplied from Figure 1 the hopper 20 shown is kneaded to become a kneaded product 150. At this time, gas 200 is generated from the kneaded product 150 and an entrainment phenomenon occurs. The entrainment phenomenon refers to a phenomenon in which droplets 300 splash along with the flow of the gas 200, and the droplets 300 blown out along with the gas 200 contain, for example, oil and low-viscosity resin.

[0054] And, the gas 200 containing the droplets 300 generated from the kneaded product 150 Figure 3 as shown, after flowing into the internal space 13 of the housing 12 from the opening OP formed on the cylinder block 10, while coming into contact with the plurality of capture plates 500A to 500D provided in the internal space 13, it is discharged to the outside via the pipe 40 from the exhaust port 12B provided on the upper surface of the housing 12.

[0055] As described above, the extruder in the embodiment includes a cylinder block 10 having screws 11A and 11B therein and an exhaust section VU for discharging the gas 200 generated in the cylinder block 10. At this time, the exhaust section VU has capture plates 500A to 500D for capturing the droplets 300 contained in the gas 200.

[0056] For example, as Figure 3 shown, in the extruder, the cylinder block 10 has an opening OP for discharging the gas 200 containing the droplets 300. Further, the exhaust section VU includes a housing 12 having an internal space 13 connected to the opening OP, and an exhaust port 12B is provided on the housing 12 for discharging the gas 200 flowing into the internal space 13 from the opening OP from the internal space 13. On the other hand, a plurality of capture plates 500A to 500D are provided in the internal space 13.

[0057] The plurality of capture plates 500A to 500D are respectively arranged to be in contact with the airflow of the gas 200 containing the droplets 300 flowing into the internal space 13 from the opening OP. In other words, the plurality of capture plates 500A to 500D are respectively arranged to block a part of the airflow of the gas 200 containing the droplets 300 flowing into the internal space 13 from the opening OP.

[0058] For example, as Figure 3 shown, the plurality of capture plates 500A to 500D include: capture plates 500A and 500C protruding in a first protruding direction from the inner wall of the housing 12 toward the internal space 13; and capture plates 500B and 500D protruding in a second protruding direction from the inner wall of the housing 12 toward the internal space 13. At this time, the first protruding direction and the second protruding direction are intersecting directions, and the capture plate 500A protruding in the first protruding direction is separated from the capture plate 500B protruding in the second protruding direction. Similarly, the capture plate 500C protruding in the first protruding direction is separated from the capture plate 500D protruding in the second protruding direction.

[0059] Furthermore, regarding the housing (exhaust housing) 12 which is a component of the exhaust unit VU, the housing 12 is an exhaust housing configured to be mountable to an extruder and discharge the gas 200 generated in the extruder. Here, the housing 12 has capture plates 500A to 500D for capturing the droplets 300 contained in the gas 200. That is, the housing 12 is an exhaust housing configured to be connectable to a cylinder 10 having screws 11A and 11B inside and discharge the gas 200 generated in the cylinder 10, and the housing 12 has capture plates 500A to 500D for capturing the droplets 300 contained in the gas 200.

[0060] Here, for example, as Figure 3 shown, an exhaust port 12B for discharging the gas 200 is provided on the housing 12, and the exhaust port 12B is configured to be connectable to a pipe 40.

[0061] Next, a specific configuration example of the exhaust unit VU will be described.

[0062] Figure 4 is a schematic diagram showing a specific example of the exhaust unit VU. In particular, Figure 4 (a) of is a perspective view showing the overall configuration of the exhaust unit VU, Figure 4 (b) of is a partial cross-sectional view of the exhaust unit VU.

[0063] In Figure 4 (a) of and Figure 4 (b) of, the exhaust unit VU includes a housing 12 having an internal space 13 and a pipe connection portion 40A, and the housing 12 is connected to the pipe connection portion 40A.

[0064] Next, Figure 5 FIG. 600 schematically shows a baffle 600. In particular, Figure 5 (a) shows a schematic diagram of the interior of the baffle 600, Figure 5 (b) shows a schematic diagram of the external configuration of the baffle. As shown in Figure 5 (a) and Figure 5 (b), the baffle 600 is formed in a cylindrical shape, and a plurality of capture plates 500A to 500D are provided inside the baffle 600. The plurality of capture plates 500A to 500D are each formed in a sector shape, for example.

[0065] Next, Figure 6 FIG. shows the baffle 600 shown in Figure 5 assembled into the exhaust portion VU shown in Figure 4 . FIG. is a partial cross-sectional view showing the configuration. As shown in Figure 6 , the baffle 600 provided with a plurality of capture plates 500A to 500D is assembled into the internal space of the frame 12 which is a component of the exhaust portion VU. Thus, a specific example of the exhaust portion VU in the implementation mode is constituted.

[0066] <<Features in the implementation mode>>

[0067] Next, the feature points in the implementation mode will be described.

[0068] For example, as shown in Figure 3 , the first feature point in the implementation mode is that a plurality of capture plates 500A to 500D are provided in the internal space 13 of the frame 12. That is, the first feature point is that the exhaust portion VU has a plurality of capture plates 500A to 500D.

[0069] Thus, according to the first feature point, the droplets 300 contained in the gas 200 flowing from the cylinder block 10 into the exhaust portion VU adhere to the capture plates 500A to 500D. As a result, it is possible to suppress the droplets 300 from entering the pipe 40 through the exhaust port 12B of the exhaust portion VU (see Figure 3 ). Thus, according to the first feature point, it is possible to suppress the accumulation of foreign matter due to the droplets 300 adhering to the inner wall of the pipe 40 and solidifying, and therefore it is possible to prevent the blockage of the pipe 40 caused by the accumulation of foreign matter.

[0070] Specifically, in Figure 3In this case, gas 200 containing droplets 300 is generated from the mixture 150 obtained by kneading through the rotation of the screws 11A and 11B provided inside the cylinder 10. And the gas 200 containing droplets 300 flows into the internal space 13 of the housing 12 which is a component of the exhaust portion VU from the opening OP provided in the cylinder 10. The gas 200 containing droplets 300 flowing into the internal space 13 first contacts the capture plate 500A protruding from the inner wall of the internal space 13 in the first protruding direction. In other words, a part of the air flow of the gas 200 containing droplets 300 flowing into the internal space 13 is blocked by the capture plate 500A. At this time, a part of the droplets 300 contained in the gas 200 adheres to the capture plate 500A. As a result, a part of the droplets 300 contained in the gas 200 is removed.

[0071] Next, a part of the gas 200 not blocked by the capture plate 500A travels upward in the internal space 13 and contacts the capture plate 500B protruding from the inner wall of the internal space 13 in the second protruding direction. Thereby, a part of the droplets 300 contained in the gas 200 adheres to the capture plate 500B. As a result, a part of the droplets 300 contained in the gas 200 is removed.

[0072] And a part of the gas 200 not blocked by the capture plate 500B travels upward in the internal space 13 and contacts the capture plate 500C protruding from the inner wall of the internal space 13 in the first protruding direction. Thereby, a part of the droplets 300 contained in the gas 200 adheres to the capture plate 500C. As a result, a part of the droplets 300 contained in the gas 200 is removed.

[0073] In addition, a part of the gas 200 not blocked by the capture plate 500C travels upward in the internal space 13 and contacts the capture plate 500D protruding from the inner wall of the internal space 13 in the second protruding direction. Thereby, a part of the droplets 300 contained in the gas 200 adheres to the capture plate 500D. As a result, a part of the droplets 300 contained in the gas 200 is removed.

[0074] As described above, the gas 200 from which most of the droplets 300 have been removed is discharged from the pipe 40 through the exhaust port 12B provided on the opposing surface (upper surface) of the housing 12 opposed to the opening OP. At this time, according to the first feature point, most of the droplets 300 contained in the gas 200 adhere to the capture plates 500A to 500D and are removed. Thereby, according to the first feature point, the entry of the droplets 300 into the pipe 40 is suppressed, and as a result, the clogging of the pipe 40 caused by the droplets 300 can be prevented.

[0075] In this way, the basic concept of removing the droplet 300 in the exhaust section VU before the droplet 300 enters the pipe 40 from the exhaust port 12B of the exhaust section VU is realized by the first characteristic point of a specific embodiment in which a plurality of capture plates 500A to 500D are provided in the internal space 13 of the casing 12 constituting the exhaust section VU.

[0076] Next, for example, as Figure 3 shown, the second characteristic point in the specific embodiment is that an exhaust port 12B is provided on the opposing surface (upper surface) of the casing 12 that opposes the opening OP provided in the cylinder block 10. Thus, even in the case where the droplets 300 contained in the gas 200 cannot be completely removed by the capture plates 500A to 500D and the droplets 300 enter the pipe 40 and adhere to the inner wall of the pipe 40, it is possible to expect that the droplets 300 adhering to the inner wall of the pipe 40 will return to the internal space 13 from the pipe 40 via the exhaust port 12B due to gravity. In particular, the larger the droplets 300, the greater the gravity applied to the droplets 300, and the easier it is for them to return from the pipe 40 to the internal space 13 of the casing 12. Therefore, the possibility of large-sized droplets 300 that could clog the pipe 40 adhering to the inner wall of the pipe 40 can be reduced.

[0077] Therefore, according to the second characteristic point, it is possible to further prevent the clogging of the pipe 40 caused by the droplets 300 by combining with the above first characteristic point.

[0078] <<Detailed Configuration of Capture Plates>>

[0079] Next, the detailed configuration of the capture plates will be described.

[0080] (1) Length of Capture Plate

[0081] Figure 7 is a diagram showing an example of the length of the capture plate.

[0082] In Figure 7 it, the inflow direction of the gas containing droplets into the internal space 13 of the casing 12 is the vertical direction (Y direction). That is, the inflow direction of the gas containing droplets into the internal space 13 of the casing 12 is the direction perpendicular to the opening provided in the cylinder block.

[0083] In addition, the first protruding direction in which each of the capture plates 500A and 500C protrudes from the inner wall of the casing 12 into the internal space 13 is a direction inclined from the horizontal direction (X direction), and the second protruding direction in which each of the capture plates 500B and 500D protrudes from the inner wall of the casing 12 into the internal space 13 is a direction inclined from the horizontal direction (X direction).

[0084] Here, when the maximum length in the horizontal direction of the internal space 13 is set as "W", the maximum length in the horizontal direction of each of the capture plates 500A and 500C is set as "L1", and the maximum length in the horizontal direction of each of the capture plates 500B and 500D is set as "L2", the relationships of 0.5 ≤ L1 / W and 0.5 ≤ L2 / W hold.

[0085] When setting the lengths of the capture plates 500A to 500D in this way, the capture efficiency of droplets contained in the gas by the capture plates 500A to 500D can be improved. That is, when designing the lengths of the capture plates 500A to 500D so that the relationships of 0.5 ≤ L1 / W and 0.5 ≤ L2 / W hold, the probability that the gas containing droplets comes into contact with the capture plates 500A to 500D respectively increases. Therefore, most of the droplets contained in the gas can be removed by attaching them to the capture plates 500A to 500D.

[0086] Figure 8 It is a diagram illustrating another example of the length of the capture plate.

[0087] In Figure 8 the inflow direction of the gas containing droplets flowing into the internal space 13 of the housing 12 is the vertical direction (Y direction). In addition, the first protruding direction in which each of the capture plates 500A and 500C protrudes from the inner wall of the housing 12 into the internal space 13 is a direction inclined from the horizontal direction (X direction), and the second protruding direction in which each of the capture plates 500B and 500D protrudes from the inner wall of the housing 12 into the internal space 13 is a direction inclined from the horizontal direction (X direction).

[0088] Here, when the maximum length in the horizontal direction of the internal space 13 is set as "W", the maximum length in the horizontal direction of each of the capture plates 500A and 500C is set as "L1", and the maximum length in the horizontal direction of each of the capture plates 500B and 500D is set as "L2", the relationships of 0.5 > L1 / W and 0.5 > L2 / W hold.

[0089] When setting the lengths of the capture plates 500A to 500D in this way, the capture efficiency of droplets contained in the gas by the capture plates 500A to 500D is lower than Figure 7 the configuration shown. On the other hand, the passage efficiency of the gas passing through the internal space 13 can be improved. That is, if the maximum lengths of the capture plates 500A to 500D are designed so that the relationships of 0.5 > L1 / W and 0.5 > L2 / W hold, the passage efficiency of the gas can be improved. Therefore, the exhaust efficiency of the gas generated from the mixture can be improved.

[0090] As described above, considering Figure 7 andFigure 8 From the perspective of capturing droplets contained in the gas and improving the gas passage efficiency, for example, it is desirable to set the maximum length of each capture plate 500A~500D so that the relationship of 0.3≤L1 / W≤0.9 and 0.3≤L2 / W≤0.9 holds.

[0091] The reason is that if the maximum length of each capture plate 500A~500D is set in a way that the relationship L1 / W>0.9 and L2 / W>0.9 is established, the gas passage efficiency will be too low. On the other hand, if the maximum length of each capture plate 500A~500D is set in a way that the relationship L1 / W<0.3 and L2 / W<0.3 is established, it will be difficult to obtain the droplet capture effect based on the capture plates 500A~500D.

[0092] (2) Capture plate configuration angle

[0093] Figure 9 This is a diagram for explaining an example of the arrangement angle of the capture plate.

[0094] exist Figure 9 In the embodiment, the inflow direction of the gas containing droplets flowing into the internal space 13 of the frame 12 is the vertical direction (Y direction). In addition, the first protruding direction in which the capture plate 500A and the capture plate 500C protrude from the inner wall of the frame 12 toward the internal space 13 is a direction inclined from the horizontal direction (X direction), and the second protruding direction in which the capture plate 500B and the capture plate 500D protrude from the inner wall of the frame 12 toward the internal space 13 is a direction inclined from the horizontal direction (X direction).

[0095] Here, in Figure 9 In the embodiment, the angle between the horizontal direction and the first protruding direction is θ1, and the angle between the horizontal direction and the second protruding direction is θ2. If θ1 and θ2 are small, the size of the frame 12 having the internal space 13 can be reduced.

[0096] Figure 10 This is a diagram for explaining another example of the arrangement angle of the capture plate.

[0097] exist Figure 10 In the embodiment, the inflow direction of the gas containing droplets flowing into the internal space 13 of the frame 12 is the vertical direction (Y direction). In addition, the first protruding direction in which the capture plate 500A and the capture plate 500C protrude from the inner wall of the frame 12 toward the internal space 13 is a direction inclined from the horizontal direction (X direction), and the second protruding direction in which the capture plate 500B and the capture plate 500D protrude from the inner wall of the frame 12 toward the internal space 13 is a direction inclined from the horizontal direction (X direction).

[0098] Here, in Figure 10In this case, the angle formed between the horizontal direction and the first protruding direction is set as θ1, and the angle formed between the horizontal direction and the second protruding direction is set as θ2. If θ1 and θ2 are large, it is easy for the droplets attached to the capture plates 500A to 500D to fall toward the extruder side (cylinder side). Thus, when θ1 and θ2 are large, it is easy to remove the droplets.

[0099] As described above, considering Figure 9 and Figure 10 , from the viewpoints of miniaturizing the size of the frame body 12 which is a component of the exhaust section and easily removing droplets, regarding the arrangement angles of the capture plates 500A to 500D, it is desirable that the relationship of 30° ≤ θ1 ≤ 80° and 30° ≤ θ2 ≤ 80° holds.

[0100] Furthermore, it is desirable to arrange the capture plates 500A to 500D such that the relationship of 40° ≤ θ1 ≤ 50° and 40° ≤ θ2 ≤ 50° holds. However, the arrangement angles of the capture plates 500A to 500D are not limited to this. For example, the capture plates 500A to 500D can also be arranged such that the relationship of θ1 = 0 and θ2 = 0 holds. That is, the basic concept can also be realized by arranging the capture plates 500A to 500D to protrude from the inner wall of the frame body 12 in the horizontal direction (X direction).

[0101] <Variation Example 1>

[0102] Figure 11 is a diagram schematically showing the configuration of the exhaust section VU in this Variation Example 1.

[0103] As Figure 11 shown, in the internal space 13 of the frame body 12 which is a component of the exhaust section VU, one capture plate 500A is provided. In this way, the exhaust section VU can also be configured to have one capture plate 500A. That is, the basic concept can be realized not only as the realization method Figure 3 shown, which is realized as a configuration having a plurality of capture plates 500A to 500D in the exhaust section VU, but also as in Figure 11 this Variation Example 1 shown, which is realized as a configuration having one capture plate 500A in the exhaust section VU.

[0104] <Variation Example 2>

[0105] Figure 12 is a diagram schematically showing the configuration of the exhaust section VU in this Variation Example 2.

[0106] As Figure 12As shown, an exhaust port 12A is provided on the side surface of the casing 12 which is a component of the exhaust section VU. In this way, the exhaust section VU can also be configured such that the exhaust port 12A is provided on the side surface of the casing 12. That is, the basic concept can be embodied not only in the form shown in Figure 3 wherein the exhaust port 12B is provided on the upper surface of the casing 12, but also in the form of this second modification example 2 shown in Figure 12 wherein the exhaust port 12A is provided on the side surface of the casing 12.

[0107] The invention completed by the inventor of the present application has been specifically described based on its embodiments. However, the present invention is not limited to the foregoing embodiments, and various modifications can of course be made without departing from its gist.

[0108] Explanation of Reference Numerals

[0109] 10 Cylinder block

[0110] 11A Screw

[0111] 11B Screw

[0112] 12 Casing

[0113] 12A Exhaust port

[0114] 12B Exhaust port

[0115] 13 Internal space

[0116] 20 Hopper

[0117] 30 Rotation drive mechanism

[0118] 40 Pipe

[0119] 40A Pipe connection part

[0120] 50 Vacuum pump

[0121] 100 Extruder

[0122] 150 Kneaded product

[0123] 200 Gas

[0124] 300 Droplet

[0125] 300A Foreign matter

[0126] 500A Capture plate

[0127] 500B Capture plate

[0128] 500C Capture plate

[0129] 500D Capture plate

[0130] 600 Baffle

[0131] OP Opening

[0132] VU Exhaust Port

[0133] VU1 Exhaust Port

Claims

1. An extruder, wherein, Comprising: A cylinder block having a screw inside; And An exhaust portion that discharges the gas generated in the cylinder block, The exhaust portion has a capture plate that captures the droplets contained in the gas.

2. The extruder according to claim 1, wherein The cylinder block has an opening for discharging the gas containing the droplets, The exhaust portion includes a housing having an internal space connected to the opening, An exhaust port is provided in the housing for discharging the gas flowing into the internal space from the opening out of the internal space, The capture plate is provided in the internal space.

3. The extruder according to claim 2, wherein The exhaust port is configured to be connectable to a pipe.

4. The extruder according to claim 2, wherein The capture plate is arranged to contact the airflow of the gas containing the droplets flowing into the internal space from the opening.

5. The extruder according to claim 2, wherein The capture plate is arranged to block a part of the airflow of the gas containing the droplets flowing into the internal space from the opening.

6. The extruder according to claim 1, wherein A plurality of capture plates are provided.

7. The extruder according to claim 2, wherein A plurality of capture plates are provided, The plurality of capture plates include: A first capture plate that protrudes in a first protruding direction from the inner wall of the housing toward the internal space; and A second capture plate that protrudes in a second protruding direction from the inner wall of the housing toward the internal space, The first protruding direction and the second protruding direction are intersecting directions, The first capture plate is separated from the second capture plate.

8. The extruder according to claim 7, wherein The inflow direction of the gas containing the droplets flowing into the internal space is the vertical direction, The first protruding direction is a direction inclined from the horizontal direction, The second protruding direction is a direction inclined from the horizontal direction, When the maximum length in the horizontal direction of the internal space is set as W, the maximum length in the horizontal direction of the first capture plate is set as L1, and the maximum length in the horizontal direction of the second capture plate is set as L2, The relationship of 0.5 ≤ L1 / W and 0.5 ≤ L2 / W holds.

9. The extruder according to claim 7, wherein The inflow direction of the gas containing the droplets flowing into the internal space is the vertical direction, The first protruding direction is a direction inclined from the horizontal direction, The second protruding direction is a direction inclined from the horizontal direction, When the maximum length in the horizontal direction of the internal space is set as W, the maximum length in the horizontal direction of the first capture plate is set as L1, and the maximum length in the horizontal direction of the second capture plate is set as L2, The relationship of 0.3 ≤ L1 / W ≤ 0.9 and 0.3 ≤ L2 / W ≤ 0.9 holds.

10. The extruder according to claim 7, wherein The inflow direction of the gas containing the droplets flowing into the internal space is the vertical direction, The first protruding direction is a direction inclined from the horizontal direction. The second protruding direction is a direction inclined from the horizontal direction. When the angle formed between the horizontal direction and the first protruding direction is set as θ1, and the angle formed between the horizontal direction and the second protruding direction is set as θ2, the relationship of 30° ≤ θ1 ≤ 80° and 30° ≤ θ2 ≤ 80° holds.

11. The extruder according to claim 10, wherein the relationship of 40° ≤ θ1 ≤ 50° and 40° ≤ θ2 ≤ 50° holds.

12. The extruder according to claim 2, wherein the frame has an opposing surface opposing the opening portion, and the exhaust port is provided in the opposing surface.

13. An exhaust frame, wherein the exhaust frame is configured to be attachable to an extruder and discharge the gas generated in the extruder, and the exhaust frame has a capture plate for capturing droplets contained in the gas.

14. An exhaust frame, wherein the exhaust frame is configured to be connectable to a cylinder having a screw therein and discharge the gas generated in the cylinder, and the exhaust frame has a capture plate for capturing droplets contained in the gas.

15. The exhaust frame according to claim 14, wherein an exhaust port for discharging the gas is provided in the exhaust frame, and the exhaust port is configured to be connectable to a pipe.

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