JP2020069716A - Elastomer or rubber dehydrator - Google Patents

Abstract

To provide a dehydrator that is compact and has few operational issues.SOLUTION: An elastomer or rubber dehydrator 1 comprises: a cylinder 2 that includes a hopper portion 4 in which a raw material of a raw material elastomer or raw material rubber is supplied, and an outlet portion 5 from which a raw material substance of reduced liquid content is discharged; a screw 3 that is rotatably driven in the cylinder 2 and forms a flow path F for the raw material together with the cylinder 2; and a flow path adjustment mechanism 6 that is located between the hopper portion 4 and the outlet portion 5 and can adjust the cross-sectional area of the flow path F.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a device applied to the dehydration and drying of elastomers or rubbers. More specifically, the present invention relates to a mechanical dehydrator used in a post-process of polymerizing an elastomer or rubber.

  Wet particle slurries are often produced during the production of elastomers and rubbers polymerized by solution, emulsion and suspension polymerizations. This slurry is typically composed of an elastomer or rubber polymerized with water in the form of fine particles in a crumb state. The particulates are known in the art as fines and typically have dimensions in the range of about 0.1 to 4.0 mm in diameter. In order for the elastomer or rubber to be prepared for further use, the slurry water must be removed and the water content of the elastomer or rubber reduced to as low as about 0.5% by weight.

  The water content is reduced by a dehydration step in which the water content of the raw material elastomer or rubber (hereinafter referred to as raw material) is reduced to about 3 to 15% by weight, and the water content of the raw material is set to about 3 to 15% by weight. It is often done by a drying process that is reduced to around 0.5% by weight. As used herein, the term dehydration also includes drying unless it affects the overall concept or operation of the present invention.

  FIG. 8 shows a prior art elastomer or rubber dehydrator 101 (see Patent Document 1). The dehydrator 101 includes a dehydrator 121 and a dryer 122. In the dehydration section 121, water is separated from the raw material, and the separated water flows backward in the flow path between the screw 103a and the cylinder 102a due to the inclination of the cylinder 102 itself and the local inclination of the taper portion 126. The water flowed back is discharged to the outside of the system via a slit 123 provided below the hopper unit 104. Due to the effect of reducing the flow passage area in the tapered portion 126, pressure is applied to the raw material substance, and the separation of water and rubber components is promoted. The separated water is similarly discharged to the outside of the system.

  The raw material having a water content of 3 to 15 wt% by being squeezed in this way is sent to the drying unit 122 through the connection pipe 151. In the drying section 122, the raw material is conveyed downstream in the cylinder 102b by the screw 103b. The raw material is compacted, undergoes a shearing action and self-heats, and the temperature rises. The water contained in the raw material is vaporized by the heat of the raw material. Strictly speaking, this moisture is in the state of compressed vapor because it is contained in the compacted raw material. In the vicinity of the outlet, the raw material becomes a foam due to expansion of water vapor due to the pressure decrease, and at the outlet, the pressure is suddenly released to atmospheric pressure. For this reason, the bubbles of the foam grow and expand remarkably, and finally the bubbles are broken. This phenomenon is called expanding. As a result, the water content is separated from the raw material as water vapor, and the raw material is dried and discharged as a solid content.

Japanese Patent Publication No. 2014-512994

  As described above, conventionally, the dehydration function and the drying function of the raw material are separated, and the dehydration section and the drying section are connected in series. Therefore, the conventional dehydrator dryer has a problem that the device becomes huge and the installation area increases. Further, there is a problem in operation of the apparatus that particles of the raw material substance adhere to the inner surface of the connection pipe connecting the dehydration unit and the drying unit, and the connection pipe is likely to be blocked. Specifically, as a result of the raw material substance staying in the connecting pipe, the material supply to the drying section is likely to be intermittent. Therefore, an excessive load is likely to be applied to the drying section, and the flow of the raw material in the drying section tends to be unstable. As a result, excessive heat is easily applied to the material, which may cause deterioration or gelation of the rubber.

  It is an object of the present invention to provide a dehydrator that is compact and has few problems in operation.

  The elastomer or rubber dehydrator of the present invention is a cylinder provided with a hopper portion to which a raw material substance which is a raw material elastomer or raw rubber is supplied, and an outlet portion from which a raw material substance with a reduced liquid content is discharged. And a screw that is rotationally driven in the cylinder and forms a flow path for the raw material together with the cylinder, and a flow path adjusting mechanism that is located between the hopper section and the outlet section and that can adjust the cross-sectional area of the flow path. Have.

  According to the present invention, the flow path adjusting mechanism is provided between the hopper portion and the outlet portion of the cylinder. The flow path adjusting mechanism can adjust the cross-sectional area of the flow path. Since the pressure on the upstream side and the pressure on the downstream side of the flow path adjusting mechanism are different, the dehydration function can be provided on the upstream side and the drying function can be provided on the downstream side. Therefore, it is not necessary to form the dehydration unit and the drying unit by separate cylinders, and an integrated cylinder can be used. Along with this, a pipe connecting the dehydration unit and the drying unit is also unnecessary, so that the above-mentioned problem can be solved. Therefore, according to the present invention, it is possible to provide a dehydrator which is compact and has few problems in operation.

1 is a side view of an elastomer or rubber dehydrator of the present invention. It is a conceptual diagram of a flow path adjusting mechanism. It is sectional drawing of a cylinder. It is a conceptual diagram of an opening area adjustment mechanism. It is a figure which shows notionally the flow of the raw material and moisture in the flow path adjusting mechanism vicinity. It is a figure which shows notionally the flow of the water from a 1st discharge opening. It is a figure which shows notionally the flow of the water from a 2nd discharge opening. It is a side view of the conventional dehydrator of an elastomer or rubber.

  Hereinafter, the elastomer or rubber dehydrator of the present invention will be described in detail with reference to embodiments. The embodiments described below are examples of the present invention and do not limit the present invention.

  FIG. 1 is a side view of an elastomer or rubber dehydrator 1 according to an embodiment of the present invention. The dehydrator 1 has a substantially cylindrical cylinder 2 in which a screw 3 is provided. A hopper portion 4 to which a raw material is supplied is provided at one end of the cylinder 2, and an outlet portion (die) 5 is provided at the other end for discharging an elastomer or rubber that has been dehydrated and dried to reduce the liquid content. It is provided. The screw 3 has a flight 3b spirally extending around the shaft 3a. The screw 3 is connected to a motor 8 via a speed reducer 7, and the motor 8 rotationally drives the cylinder 2. A rotating shaft between the motor 8 and the speed reducer 7 is supported by a bearing 9. In the cylinder 2, the screw 3 forms a flow path F for the raw material together with the cylinder 2. Since the dehydrator 1 of the present embodiment is of a single screw type, the rotation axis of the screw 3 coincides with the longitudinal axis X1 of the cylinder 2. Therefore, the rotation axis of the screw 3 and the longitudinal axis X1 of the cylinder 2 are used interchangeably.

  A flow passage adjusting mechanism 6 capable of adjusting the cross-sectional area of the flow passage F is provided between the hopper portion 4 and the outlet portion 5. The flow path adjusting mechanism 6 adjusts the cross-sectional area of the flow path F to adjust the pressure on the upstream side and the downstream side thereof. The flow path adjusting mechanism 6 includes a dehydrator 21 for reducing the water content of the raw material to a range of 3% by weight or more and 15% by weight or less, and the water content of the raw material of less than 1% by weight, preferably 0.5. It also has a function as a separation unit that separates the drying unit 22 that is reduced to less than%. The flow path adjusting mechanism 6 also functions as a pressure adjusting mechanism between the dehydrating section 21 and the drying section 22 of the cylinder 2. Hereinafter, in this specification, the flow path adjusting mechanism and the pressure adjusting mechanism are used as mutually interchangeable terms.

  FIG. 2 shows an example of the flow path adjusting mechanism 6. 2A is a side view of the flow path adjusting mechanism, FIGS. 2B and 2C are cross-sectional views taken along the line AA of FIG. 2A, and FIG. 2C shows a closed state, and FIG. 2C shows a state in which the flow path is opened. The flow path adjusting mechanism 6 has a pair of flat plates 11 and 12 provided with the screw 3 interposed therebetween, that is, a first flat plate 11 and a second flat plate 12. The first flat plate 11 is supported by a first rod 13 which is vertically movable. The second flat plate 12 is supported by a second rod 14 which is vertically movable. The first rod 13 and the second rod 14 are each connected to a drive mechanism (not shown). A semi-circular cutout 15 is formed in a portion of the first flat plate 11 and the second flat plate 12 that face each other. When the flow path F shown in FIG. 2B is closed, the notches 15 of the first flat plate 11 and the second flat plate 12 face each other to form a circular opening substantially equal to the screw 3. Also, the interference between the second flat plates 11 and 12 and the screw 3 is prevented.

  In FIG. 2B, by raising the first rod 13, the first flat plate 11 rises and is separated from the screw 3. At the same time, by lowering the second rod 14, the second flat plate 12 is lowered and separated from the screw 3. As a result, as shown in FIG. 2C, the gate composed of the first flat plate 11 and the second flat plate 12 opens, and the flow passage area around the screw 3 increases. On the contrary, in FIG. 2C, by lowering the first rod 13, the first flat plate 11 is lowered and approaches the screw 3. At the same time, by raising the second rod 14, the second flat plate 12 rises and approaches the screw 3. As a result, the gate composed of the first flat plate 11 and the second flat plate 12 is narrowed, and the flow passage area around the screw 3 is reduced. In this way, the first flat plate 11 and the second flat plate 12 can approach the screw 3 at the same time and can move away from each other at the same time. When the flow passage area increases, the pressure difference between the upstream and downstream of the flow passage adjusting mechanism 6 decreases, and when the flow passage area decreases, the pressure difference between the upstream and downstream of the flow passage adjusting mechanism 6 increases. Since the first flat plate 11 and the second flat plate 12 have a relationship in which the other moves down when one moves up, the first flat plate 11 and the second flat plate 12 such as the link mechanism and the gear mechanism are moved in opposite directions. You may connect the 1st rod 13 and the 2nd rod 14 to one drive mechanism via a power transmission mechanism.

  The cylinder 2 has a first discharge opening 23 for discharging the liquid to the outside of the cylinder 2 between the dehydration section 21, that is, the hopper section 4 and the pressure adjusting mechanism 6. The liquid is mainly a slurry that accompanies the raw material or water adhering to the surface of the raw material. A plurality of rods extend in the longitudinal direction X of the cylinder 2 and are spaced apart from each other in the circumferential direction, and the first discharge opening 23 is configured as a slit between the rods. The first discharge opening 23 is provided at a position closer to the hopper unit 4 than the pressure adjusting mechanism 6, that is, below the hopper unit 4 in this embodiment. If the first discharge opening 23 is provided over the entire length of the dehydration section 21 or in the vicinity of the pressure adjusting mechanism 6 in the dehydration section 21 where high pressure is applied to the raw material, the raw material is discharged out of the system together with water. It is not preferable because the yield of the elastomer or rubber will be reduced. In addition, the first discharge opening 23 (slit) is likely to be clogged with the raw material, which hinders the discharge of water. The ratio of the attachment area of the first discharge opening 23 to the total inner area of the side wall of the cylinder 2 in the dehydration section 21 is preferably 50% or less, more preferably 10% or less. If this ratio is too large, the raw material will be discharged, and if it is too small, it will be difficult to discharge water.

  The cylinder 2 is inclined downward from the outlet portion 5 toward the hopper portion 4 in order to promote the backflow of water toward the first discharge opening 23. That is, the longitudinal axis X1 of the cylinder 2 is inclined at an angle θ with respect to the gantry 10 when the dehydrator 1 is installed. As a result, the water contained in the raw material can be efficiently discharged by the action of gravity. Further, since the difficulty level of dehydration varies depending on the type of raw material to be treated, it is desirable to be able to adjust the inclination angle θ. The dehydrator 1 has a tilting mechanism 25 that tilts the cylinder 2 from the outlet 5 toward the hopper 4 at a variable downward tilt angle. The configuration of the tilt mechanism 25 is not particularly limited, but as an example, a hydraulic jack or a link mechanism can be provided between the vicinity of the outlet 5 of the cylinder 2 and the gantry 10 with the motor 8 side of the gantry 10 as a fulcrum.

  In the dehydration section 21, that is, in the section from the hopper section 4 to the pressure adjusting mechanism 6, a channel cross-sectional area gradually decreasing section 26 is provided in a part thereof. In the channel cross-sectional area gradually decreasing portion 26, the cross-sectional area of the channel F decreases toward the hopper portion 4. The passage cross-sectional area gradually decreasing portion 26 of the cylinder 2 has a conical shape or a tapered shape whose inner diameter decreases from the hopper portion 4 toward the pressure adjusting mechanism 6, and the diameter of the screw 3 also extends toward the pressure adjusting mechanism 6. is decreasing. As a result, a larger amount of raw material can be fed to the hopper unit 4. Further, a larger compression ratio, which is the ratio of the flow passage area of the hopper portion 4 to the flow passage area in the vicinity of the pressure adjusting mechanism 6, can be secured, so that the raw material can be pressurized with a larger pressure. Therefore, more efficient pressing can be performed and the separation of the raw material and the water can be promoted. In particular, a large inclination angle is obtained along the bottom surface of the flow passage cross-sectional area decreasing portion 26 because the entire cylinder 2 is inclined and the flow passage cross-sectional area decreasing portion 26 is tapered. Therefore, the flow passage cross-sectional area gradually decreasing portion 26 promotes the flow of water to the first discharge opening 23, and more efficient dehydration becomes possible.

  3 is a sectional view of the cylinder taken along the line AA of FIG. A plurality of protrusions 27 are formed between the hopper portion 4 on the inner surface of the cylinder 2 and the pressure adjusting mechanism 6. The protrusion 27 is formed by attaching a pin or the like to the inner surface of the cylinder 2. The protrusions 27 are provided on the inner surface of the cylinder 2 independently of each other. The protrusions 27 loosen the lumped raw material, prevent the crumb from firmly adhering to the inner surface of the cylinder 2 and lumped around the screw 3 to prevent the raw material from being transported downstream.

  Further, a groove portion 37 is formed between the hopper portion 4 on the inner surface of the cylinder 2 and the pressure adjusting mechanism 6. In the case of a single screw, the raw material is conveyed by the difference between the friction between the raw material and the surface of the screw 3 and the friction between the raw material and the inner wall surface of the cylinder 2. Therefore, by reducing the friction between the raw material and the surface of the screw 3 and increasing the friction between the raw material and the inner wall surface of the cylinder 2, it is possible to increase the transport amount of the raw material. By providing the groove portion 37 on the inner wall surface of the cylinder 2, it is possible to increase the friction between the raw material and the inner wall surface of the cylinder 2, thereby increasing the transport amount of the raw material and increasing the processing amount. .. As described above, the groove portion 37 is particularly effective in the case of a single-screw screw, but can have a certain effect regardless of the number of screws.

  The cylinder 2 has a drying section 22, that is, a second discharge opening 24 between the pressure adjusting mechanism 6 and the outlet section 5. The second drainage opening 24 provides further dehydration of water in the source material. In the drying unit 22, in addition to the liquid contained in the raw material, the water vapor released from the inside of the raw material by the foam breaking is discharged. Therefore, the second discharge opening 24 discharges both the liquid and the gas or at least one of the liquid and the gas to the outside of the cylinder 2. In order to efficiently discharge water and water vapor, the second discharge opening 24 is preferably provided not only in the lower half of the cylinder 2 but also in the upper half thereof. The second discharge opening 24 is provided at a position closer to the pressure adjusting mechanism 6 than the outlet portion 5. This facilitates the discharge of only liquid and water vapor. Since the pressure inside the cylinder 2 is higher as it is closer to the outlet part 5, if the second discharge opening 24 is installed in the vicinity of the outlet part 5, the raw material is easily discharged from the second discharge opening 24 together with water and steam, The yield of elastomers and rubber is reduced. The ratio of the mounting area of the second discharge opening 24 to the total inner area of the side wall of the cylinder 2 between the pressure adjusting mechanism 6 and the outlet portion 5 is preferably 50% or less, more preferably 10% or less. preferable.

  In addition, when the water content in the raw material is small, the expansion at the outlet portion 5 becomes insufficient, and the water remains trapped in the bubbles that have not been broken, so that sufficient dehydration is performed. There is a possibility not to be missed. If the water content is too small, the material may overheat, causing thermal deterioration or gelation of the raw material, which may lead to deterioration of the quality of the raw material after the treatment. Therefore, depending on the type of raw material, the second discharge opening 24 may not be provided between the pressure adjusting mechanism 6 and the outlet portion 5.

  Another factor that influences the phenomenon in which the raw material at the outlet portion 5 changes from foaming to foam breaking is the pressure of the raw material material near the outlet portion 5. The higher the pressure in the vicinity of the outlet portion 5 is, the larger the pressure difference at the time of releasing the pressure in the outlet portion 5 is, so that the time from foaming to breaking is shortened. For this reason, it is possible to further promote foam breakage, and it is possible to more efficiently separate the water content and the raw material by expanding. However, if the pressure is too high, excessive temperature rise of the raw material occurs near the outlet portion 5, which causes adverse effects such as thermal deterioration or gelation of the raw material, resulting in deterioration of the quality of the raw material after treatment. If the time from foaming to breaking is too short as a result of the pressure being too high, rapid expansion will occur. Therefore, the raw material is liable to become powdery, the handling property of the raw material after expansion is deteriorated, and it is easy to float in the air, which causes deterioration of the work environment and a decrease in the yield of elastomer and rubber. .. Therefore, it is desirable that the optimum pressure applied to the raw material near the outlet portion 5 can be adjusted according to the type of the raw material and the residual water content. In the present embodiment, since the pressure in the vicinity of the outlet 5 can be controlled by the pressure adjusting mechanism 6 and the opening area adjusting mechanism 28 described below, it is easy to deal with such a problem.

  The outlet portion 5 is provided with an opening 35 for discharging the raw material. In the present embodiment, the opening area adjustment mechanism 28 that can be adjusted so that the area of the opening 35 can be changed is provided. The pressure of the raw material near the outlet 5 can be adjusted by the opening area adjusting mechanism 28. FIG. 4 shows a schematic configuration of the opening area adjusting mechanism 28. FIG. 4A is a cross-sectional view of the opening area adjustment mechanism, and shows a cross section taken along line AA of FIG. 4B. 4B and 4C are side views of the opening area adjusting mechanism 28 as viewed from the rotation axis direction of the screw 3. The opening area adjusting mechanism 28 has first and second discs 29 and 30 which are coaxial with the cylinder 2 and are arranged adjacent to each other along the longitudinal axis X1 of the cylinder 2. The first disk 29 and the second disk 30 are installed at the outlet 5 at the tip of the cylinder 2 so as to be superposed on each other along the flow direction of the raw material, that is, along the longitudinal axis X of the cylinder 2.

  The first disc 29 has a plurality of first through holes 31. The second circular plate 30 has a plurality of second through holes 32. The through holes 31 and 32 are holes that become the openings 35 of the outlet portion 5. Although the cross-sectional shape of the through holes 31 and 32 is circular, the shape is not limited to this, and may be square, hexagonal, elliptical, or the like. The number and arrangement of the through holes 31, 32 in the first disk 29 and the second disk 30 are the same. More specifically, six inner through holes 31a are provided at 60 ° intervals on a first circle 33 that is concentric with the cylinder 2 on the first disc 29, and Six outer through holes 31b are provided at intervals of 60 ° on the second circle 34 having a large diameter. Six inner through holes 32a are provided at 60 ° intervals on a first circle 35 concentric with the cylinder 2 on the second circular plate 30, and a second diameter larger than the first circle 35 concentric with the cylinder 2 is provided. Six outer through holes 32b are provided on the circle 36 at intervals of 60 °. The inner through holes 31a and 32a and the outer through holes 31b and 32b are circumferentially displaced from each other at an angle of 30 °.

  The first disc 29 can be rotated around the longitudinal axis X1 of the cylinder 2 by a rotation drive mechanism (not shown), and the second disc 30 is fixed to the cylinder 2. In another embodiment, the first disk 29 is fixed to the cylinder 2, and the second disk 30 can rotate about the longitudinal axis X1 of the cylinder 2 by a rotation drive mechanism (not shown). .. Alternatively, both the first disc 29 and the second disc 30 may be configured to be rotatable about the longitudinal axis X1 of the cylinder 2. In either configuration, at least one of the first disc 29 and the second disc 30 is rotatable about the longitudinal axis X1 of the cylinder 2 with respect to the other disc. Depending on the relative rotation angle of the first disk 29 and the second disk 30, the overlapping portion of the through hole 31 of the first disk 29 and the through hole 32 of the second disk 30, that is, the opening. The area of 35 changes. In FIG. 4B, the through hole 31 of the first disk 29 and the through hole 32 of the second disk 30 completely overlap each other, and the opening area of the dehydrator 1 from the upstream to the downstream is 100%. .. On the other hand, when the first disc 29 or the second disc 30 is slid in the circumferential direction, the positions of the through holes 31 and 32 are displaced, which reduces the opening area. In FIG. 4C, since the through hole 31 of the first disc 29 and the through hole 32 of the second disc 30 partially overlap with each other, the opening area is smaller than 100%. When the raw material is transported by the screw 3 in a state where the opening area is small, a higher pressure is applied to the raw material, and the raw material is exposed to the atmosphere through the opening 35 from the state of high pressure. It tends to occur. Since the optimum pressure applied to the raw material differs depending on the type of the raw material, the opening area is appropriately adjusted so as to obtain the optimum pressure. The shapes of the first and second discs 29 and 30 are not limited to discs, and flat plates of various shapes can be used. The way of sliding is not limited to the circumferential sliding. The number of plates is not limited to two as shown in the embodiment. The size, arrangement, and number of through holes are not limited to those in the above embodiment.

  Next, the process of dehydrating the raw material by the dehydrator 1 will be described. The crumb-shaped raw material that has been polymerized by polymerization is supplied to the dehydrator 1 through the hopper section 4 of the dehydrator 1. Water contained in the crumb-shaped raw material or attached to the crumb is also fed to the dehydrator 1. Part of the water content is discharged through the first discharge opening 23.

  The raw material substance input from the hopper unit 4 of the dehydrator 1 is conveyed by the screw 3 toward the outlet unit 5. A pressure adjusting mechanism 6 is provided on the way. When the raw material reaches the vicinity of the pressure adjusting mechanism 6 provided between the hopper section 4 and the outlet section 5, the raw material is propelled by the screw 3 while the pressure adjusting mechanism 6 prevents the material from being conveyed downstream. It is compacted or squeezed because of the force applied. As a result, the water contained in or attached to the crumb is separated from the raw material and flows back toward the hopper 4. FIG. 5 shows flows of the raw material and the water in the vicinity of the pressure adjusting mechanism 6. As shown in FIG. 5 (a), if the gap between the first and second flat plates 11 and 12 and the shaft 3a of the screw 3 is large, the raw material and water are conveyed downstream through the gap. On the other hand, as shown in FIG. 5 (b), the water in the crumb is separated by forming a gap having an appropriate size. Since water has a remarkably low viscosity as compared with the raw material, it flows back into the hopper 4. The water flowing back toward the hopper unit 4 is discharged to the outside of the system through the first discharge opening 23 through the gap of the crumb of the raw material, as shown in FIG. Through the above steps, the raw material is squeezed in the dehydrating section 21, and the amount of water in the raw material immediately after passing through the pressure adjusting mechanism 6 is reduced to about 3 to 15% by weight. The appropriate range of water content varies depending on the type of raw material to be treated.

  After that, the raw material enters the drying section 22 and is conveyed toward the outlet section 5. As described above, the raw material is compacted by the screw 3, and the temperature rises due to self-heating due to the shearing action, and the residual water content becomes compressed vapor. At the outlet portion 5, the raw material and the water content are separated by expanding and further dehydrated. When the water content is too large, it is not vaporized sufficiently and remains in the raw material, but in this embodiment, as shown in FIG. 7, excess water is discharged from the second discharge opening 24. As described above, the water content of the raw material on the downstream side of the flow path adjusting mechanism 6 is reduced to less than 1% by weight, preferably less than 0.5%.

  The raw material thus treated is veiled and sent to another process for further post-processing.

DESCRIPTION OF SYMBOLS 1 Dehydrator 2 Cylinder 3 Screw 4 Hopper part 5 Exit part 6 Flow path adjustment mechanism 11 1st flat plate 12 2nd flat plate 21 Dehydration part 22 Drying part 23 1st discharge opening 24 2nd discharge opening 25 Tilt mechanism 26 Flow passage cross-sectional area gradually decreasing portion 27 Protrusion portion 28 Opening area adjusting mechanism F Flow passage X Cylinder longitudinal direction

Claims (15)

A cylinder provided with a hopper portion to which a raw material substance that is a raw material elastomer or a raw material rubber is supplied, and an outlet portion from which the raw material substance with a reduced liquid content rate is discharged,
A screw that is rotationally driven in the cylinder and forms a flow path of the raw material together with the cylinder,
Located between the hopper portion and the outlet portion, a flow path adjusting mechanism capable of adjusting the cross-sectional area of the flow path,
An elastomer or rubber dehydrator having a.   The water content of the raw material is reduced to 3 wt% or more and 15 wt% or less on the upstream side of the flow path adjusting mechanism, and the water content of the raw material is reduced to less than 1 wt% on the downstream side of the flow path adjusting mechanism. The dehydrator according to claim 1, which reduces.   The dehydrator according to claim 1 or 2, wherein the flow path adjusting mechanism includes a pair of flat plates that are provided to sandwich the screw and that can approach and separate from the screw.   The said cylinder is located between the said hopper part and the said flow path adjustment mechanism, and has the 1st discharge opening which discharges a liquid to the exterior of the said cylinder, The cylinder of any one of Claim 1 to 3. Dehydrator.   The dehydrator according to claim 4, wherein the first discharge opening is located closer to the hopper portion than the flow path adjusting mechanism.   6. The cylinder according to claim 1, further comprising a second discharge opening that is located between the flow path adjusting mechanism and the outlet and discharges at least one of liquid and gas to the outside of the cylinder. The dehydrator according to item 1.   The dehydrator according to claim 6, wherein the second discharge opening is located closer to the flow path adjusting mechanism than the outlet portion.   8. The cylinder according to claim 1, further comprising: a passage cross-section area gradually decreasing portion that is located between the hopper portion and the passage adjustment mechanism and that reduces a cross-sectional area of the passage toward the hopper portion. The dehydrator according to any one of items.   The dehydrator according to claim 1, wherein a plurality of protrusions are formed between the hopper portion on the inner surface of the cylinder and the flow path adjusting mechanism.   The dehydrator according to any one of claims 1 to 9, wherein a groove portion is formed between the hopper portion on the inner surface of the cylinder and the flow path adjusting mechanism.   The dehydrator according to any one of claims 1 to 10, wherein the outlet portion has an opening area adjustment mechanism that is adjustable so as to change the area of the opening through which the raw material substance is discharged.   The opening area adjustment mechanism includes first and second flat plates arranged adjacent to each other along a longitudinal axis of the cylinder, each of the first and second flat plates having at least one through hole. At least one of the first flat plate and the second flat plate is the other so that the area of the overlapping portion of the through hole of the first flat plate and the through hole of the second flat plate can be changed. The dehydrator according to claim 11, which is movable with respect to the flat plate.   The dehydrator according to any one of claims 1 to 12, wherein the cylinder is inclined downward from the outlet portion toward the hopper portion.   The dehydrator according to any one of claims 1 to 12, further comprising a tilting mechanism that tilts the cylinder from the outlet section toward the hopper section at a variable downward tilt angle. A cylinder provided with a hopper portion capable of supplying a raw material substance that is a raw material elastomer or raw rubber, and an outlet portion for discharging the raw material substance with a reduced liquid content rate,
A screw that is rotationally driven in the cylinder and forms a flow path of the raw material together with the cylinder,
A flow path adjusting mechanism located between the hopper section and the outlet section, the flow path adjusting mechanism capable of adjusting the pressure of the upstream side and the downstream side of the flow path adjusting mechanism of the flow path,
An elastomer or rubber dehydrator having a.

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