JP7106430B2 - Elastomer or rubber dehydrator - Google Patents

Description

The present invention relates to equipment applied to the dewatering and drying of elastomers or rubbers. More particularly, the present invention relates to mechanical dehydrator used in the post-polymerization process of elastomers and rubbers.

Wet particle slurries are often produced during the manufacture of polymerized elastomers and rubbers by solution, emulsion, and suspension polymerization. This slurry typically consists of an elastomer or rubber polymerized with water in the form of crumbs of fine particles. These microparticles are known in the art as fines and typically have dimensions ranging from 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 to reduce the water content of the elastomer or rubber to about 0.5% by weight.

The reduction of water content includes a dehydration step in which the water content of the raw elastomer or raw rubber (hereinafter referred to as raw material) is reduced to about 3 to 15% by weight, and a dehydration step in which the water content of the raw material is reduced from about 3 to 15% by weight to about 0%. It is often done by a drying process which reduces it to as low as 0.5% by weight. As used herein, the term dewatering includes drying as long as it does not affect 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 consists of a dehydrating section 121 and a drying section 122 . Water is separated from the raw material in the dewatering section 121, and the separated water flows back through 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 tapered portion 126. The backflowing water is discharged out of the system through a slit 123 provided below the hopper portion 104 . The tapered portion 126 has a channel area reduction effect, which applies pressure to the raw material and promotes the separation of water and rubber components. The separated water is similarly discharged out of the system.

The raw material having a moisture content of 3 to 15% by weight as a result of being compressed in this manner is sent to the drying section 122 through the connecting pipe 151 . In the drying section 122, the source material is conveyed downstream in the cylinder 102b by the screw 103b. The source material is compacted and self-heated under shear, raising its temperature. Moisture contained in the raw material is vaporized due to heat generation of the raw material. Strictly speaking, this water is in the form 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 the expansion of water vapor due to the pressure drop, and the pressure at the outlet is released to the atmospheric pressure all at once. As a result, the cells of the foam grow and expand remarkably, and finally break. This phenomenon is called expansion. As a result, the water content is separated from the raw material as water vapor, and the raw material is dried and discharged as solids.

Japanese translation of PCT 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 the problem that the device becomes huge and the installation area increases. In addition, there is a problem in the operation of the apparatus that the particles of the raw material adhere to the inner surface of the connecting pipe connecting the dehydrating section and the drying section, and the connecting pipe is likely to be clogged. Specifically, as a result of the raw material remaining in the connecting pipe, the supply of the material to the drying section tends to be intermittent. Therefore, an excessive load is likely to be applied to the drying section, and the flow of the raw material within the drying section tends to be unstable. As a result, excessive heat is likely to be applied to the material, which may cause deterioration or gelation of the rubber.

SUMMARY OF THE INVENTION An object of the present invention is to provide a dehydrator that is compact and has few operational problems.

The dehydrator for elastomers or rubbers of the present invention is a cylinder comprising a hopper into which a raw material, which is raw elastomer or raw rubber, is supplied and an outlet through which raw material having a reduced liquid content is discharged. a screw that is rotationally driven in the cylinder and forms a flow path for the raw material together with the cylinder; a second discharge opening positioned between the channel conditioning mechanism and the outlet for discharging liquid contained in the source material to the exterior of the cylinder. The second discharge opening is provided in at least the lower half of the cylinder in the vertical direction .

According to the present invention, the flow path adjusting mechanism is provided between the hopper portion and the outlet portion of the cylinder. The channel adjustment mechanism can adjust the cross-sectional area of the channel. Since the pressure on the upstream side and the pressure on the downstream side of the flow path adjusting mechanism are different, it is possible to provide the upstream side with a dewatering function and the downstream side with a drying function. Therefore, it is not necessary to configure the dehydrating section and the drying section with separate cylinders, and an integral cylinder can be used. As a result, the piping connecting the dehydrating section and the drying section becomes unnecessary, so that the above problem can be solved. Therefore, according to the present invention, it is possible to provide a dehydrator that is compact and has few operational problems.

1 is a side view of an elastomer or rubber dehydrator of the present invention; FIG. FIG. 4 is a conceptual diagram of a flow channel adjustment mechanism; It is a sectional view of a cylinder. It is a conceptual diagram of an opening area adjustment mechanism. FIG. 4 is a diagram conceptually showing the flow of a raw material and water near a channel adjustment mechanism; FIG. 4 conceptually illustrates the flow of water from the first discharge opening; FIG. 4 conceptually illustrates the flow of water from the second discharge opening; 1 is a side view of a conventional elastomer or rubber dehydrator; FIG.

Hereinafter, the elastomer or rubber dehydrator of the present invention will be described in detail by way of embodiments. The embodiments shown 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 one embodiment of the present invention. The dehydrator 1 has a generally cylindrical cylinder 2 in which a screw 3 is provided. One end of the cylinder 2 is provided with a hopper portion 4 to which the raw material is supplied, and the other end is provided with an outlet portion (die) 5 from which the dehydrated and dried elastomer or rubber having a reduced liquid content is discharged. is provided. The screw 3 has a flight 3b helically extending around the axis 3a. The screw 3 is connected to a motor 8 via a speed reducer 7 and driven to rotate within the cylinder 2 by the motor 8 . A rotating shaft between the motor 8 and the speed reducer 7 is supported by a bearing 9 . Inside the cylinder 2, the screw 3 forms, together with the cylinder 2, a flow path F for the raw material. Since the dehydrator 1 of this embodiment is of the single screw type, the rotation axis of the screw 3 coincides with the longitudinal axis X1 of the cylinder 2 . Therefore, the rotational axis of the screw 3 and the longitudinal axis X1 of the cylinder 2 are used interchangeably.

Between the hopper portion 4 and the outlet portion 5, a channel adjustment mechanism 6 is provided that can adjust the cross-sectional area of the channel F. As shown in FIG. By adjusting the cross-sectional area of the flow path F, the flow path adjustment mechanism 6 adjusts the pressure on the upstream side and the downstream side thereof. The flow path adjusting mechanism 6 comprises a cylinder 2 with a dewatering section 21 that reduces the water content of the raw material to a range of 3% by weight or more and 15% by weight or less, and a water content of the raw material that is less than 1% by weight, preferably 0.5% by weight. It also has a function as a separation section that separates from the drying section 22 that reduces to less than %. The flow path adjusting mechanism 6 also functions as a pressure adjusting mechanism between the dewatering section 21 and the drying section 22 of the cylinder 2 . Hereinafter, in this specification, the terms "flow path adjustment mechanism" and "pressure adjustment mechanism" are used interchangeably.

FIG. 2 shows an example of the flow path adjusting mechanism 6. As shown in FIG. FIG. 2(a) is a side view of the flow channel adjusting mechanism, FIGS. 2(b) and 2(c) are cross-sectional views taken along line AA of FIG. 2(a), and FIG. 2(b) shows the flow channel. FIG. 2(c) shows the closed state and the open state of the channel. The flow path adjusting mechanism 6 has a pair of flat plates 11 and 12, that is, a first flat plate 11 and a second flat plate 12, with the screw 3 interposed therebetween. The first flat plate 11 is supported by a vertically movable first rod 13 . The second flat plate 12 is supported by a vertically movable second rod 14 . The first rod 13 and the second rod 14 are each connected to a driving mechanism (not shown). A semicircular notch 15 is formed in a portion of the first flat plate 11 and the second flat plate 12 facing each other. When the flow path F shown in FIG. 2(b) is closed, the cutouts 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, interference between the second flat plates 11 and 12 and the screw 3 is prevented.

In FIG. 2( b ), the first flat plate 11 is lifted by lifting the first rod 13 and separated from the screw 3 . At the same time, the second rod 14 is lowered to lower the second flat plate 12 and separate it from the screw 3 . As a result, the gate composed of the first flat plate 11 and the second flat plate 12 is opened as shown in FIG. 2(c), and the flow area around the screw 3 is increased. Conversely, in FIG. 2(c), by lowering the first rod 13, the first flat plate 11 is lowered and approaches the screw 3. As shown in FIG. At the same time, the second rod 14 is raised to raise the second flat plate 12 and approach the screw 3 . As a result, the gate formed by the first flat plate 11 and the second flat plate 12 is narrowed, and the flow area around the screw 3 is reduced. Thus, the first flat plate 11 and the second flat plate 12 can approach the screw 3 at the same time and move away from it at the same time. As the flow passage area increases, the pressure difference between 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. When one of the first flat plate 11 and the second flat plate 12 rises, the other falls. 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 dewatering section 21 , ie the hopper section 4 and the pressure regulating mechanism 6 . The liquid is primarily the slurry associated with the source material or water adhering to the surface of the source material. A plurality of rods extend in the longitudinal direction X of the cylinder 2 and are circumferentially spaced from one another, the first discharge openings 23 being configured as slits between the rods. The first discharge opening 23 is provided at a position closer to the hopper portion 4 than the pressure adjustment mechanism 6, that is, below the hopper portion 4 in this embodiment. If the first discharge opening 23 is provided over the entire length of the dehydrating section 21 or in the vicinity of the pressure adjusting mechanism 6 that applies a high pressure to the raw material in the dehydrating section 21, the raw material is discharged out of the system together with the water. It is not preferable because the yield of elastomer and rubber is lowered. 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 mounting area of the first discharge opening 23 to the total inner area of the side wall of the cylinder 2 in the dewatering 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, water will be difficult to be discharged.

The cylinder 2 slopes downward from the outlet section 5 towards the hopper section 4 in order to facilitate the backflow of moisture towards 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 frame 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. In addition, since the degree of difficulty of dehydration varies depending on the type of raw material to be processed, it is desirable to be able to adjust the angle of inclination θ. The dehydrator 1 has a tilt mechanism 25 that tilts the cylinder 2 from the outlet portion 5 toward the hopper portion 4 at a variable downward tilt angle. The structure of the tilt mechanism 25 is not particularly limited, but as an example, a hydraulic jack or a link mechanism may be provided between the vicinity of the outlet 5 of the cylinder 2 and the pedestal 10 with the motor 8 side of the pedestal 10 as a fulcrum.

The dewatering section 21 , that is, the section from the hopper section 4 to the pressure regulating mechanism 6 is provided with a channel cross-sectional area gradual reduction section 26 in a part thereof. The cross-sectional area of the flow path F decreases from the hopper section 4 toward the pressure adjustment mechanism 6 in the flow path cross-sectional area gradually decreasing portion 26 . The passage cross-sectional area gradually decreasing portion 26 of the cylinder 2 has a conical or tapered shape in which the inner diameter decreases from the hopper portion 4 toward the pressure regulating mechanism 6, and the diameter of the screw 3 also decreases toward the pressure regulating mechanism 6. is decreasing. As a result, a larger amount of raw material can be introduced into the hopper section 4 . In addition, since a higher compression ratio, which is the ratio of the channel area of the hopper portion 4 to the channel area near the pressure adjusting mechanism 6, can be ensured, the raw material can be pressurized at a higher pressure. Therefore, more efficient pressing can be achieved and separation of the raw material and water can be facilitated. In particular, the inclination of the entire cylinder 2 and the tapered shape of the gradually decreasing cross-sectional area portion 26 provide a large angle of inclination along the bottom surface of the gradually decreasing cross-sectional area portion 26 . For this reason, the flow of water to the first discharge opening 23 is promoted at the passage cross-sectional area gradually decreasing portion 26, and more efficient dehydration becomes possible.

3 is a cross-sectional view of the cylinder along line AA of FIG. 1. FIG. A plurality of projecting portions 27 are formed between the hopper portion 4 on the inner surface of the cylinder 2 and the pressure adjusting mechanism 6 . The projecting portion 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 protruding part 27 loosens the clumped raw material and prevents the crumbs from firmly adhering to the inner surface of the cylinder 2 and clumping 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 and the pressure adjusting mechanism 6 on the inner surface of the cylinder 2 . In the case of a single screw, the difference in 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 causes the raw material to be transported. 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, the conveying amount of the raw material can be increased. By providing the grooves 37 on the inner wall surface of the cylinder 2, it is possible to increase the friction between the source material and the inner wall surface of the cylinder 2, thereby increasing the transportation amount of the source material and increasing the throughput. . As described above, the groove portion 37 is particularly effective in the case of a single screw, but a certain effect can be achieved regardless of the number of screws.

The cylinder 2 has a second discharge opening 24 between the drying section 22 , ie the pressure regulating mechanism 6 and the outlet section 5 . A second discharge opening 24 provides further dewatering of water in the source material. In the drying section 22, in addition to the liquid contained in the raw material, water vapor released from the inside of the raw material by breaking bubbles is discharged. The second discharge opening 24 thus discharges both liquid and/or gas to the outside of the cylinder 2 . Preferably, the second discharge openings 24 are provided not only in the lower half of the cylinder 2, but also in the upper half, in order to efficiently discharge moisture and water vapor. The second discharge opening 24 is provided at a position closer to the pressure regulation mechanism 6 than the outlet portion 5 is. This facilitates the evacuation of only liquid and water vapor. Since the pressure inside the cylinder 2 is higher the closer it is to the outlet 5, when the second discharge opening 24 is provided near the outlet 5, the raw material is more likely to be discharged from the second discharge opening 24 together with water and steam. Yields of elastomers and rubbers are reduced. The ratio of the mounting area of the second discharge opening 24 to the total internal area of the side wall of the cylinder 2 between the pressure regulating mechanism 6 and the outlet portion 5 is preferably 50% or less, more preferably 10% or less. preferable.

If the amount of water contained in the raw material is small, the expansion at the exit portion 5 will be insufficient, and the water will remain trapped in the bubbles that have not been broken. may not be broken. Too little moisture can lead to overheating of the material, which can lead to thermal degradation or gelation of the source material, leading to poor quality of the processed source material. 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 affecting the phenomenon from foaming to breakage of the raw material at the outlet 5 is the pressure of the raw material near the outlet 5 . The higher the pressure in the vicinity of the outlet portion 5, the greater the pressure difference when the pressure is released at the outlet portion 5, and the shorter the time from foaming to breakage. Therefore, the breakage of foam can be further promoted, and the separation of the contained water and the raw material by the expansion can be performed more efficiently. However, if the pressure is too high, excessive temperature rise of the raw material occurs near the outlet 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 pressure is too high and the time from foaming to breakage is too short, expansion will occur rapidly. For this reason, the raw material tends to become powdery, and the handleability of the raw material after expansion deteriorates, and it tends to float in the air. . Therefore, it is desirable that the optimum pressure applied to the raw material near the outlet 5 can be adjusted according to the type of raw material and the amount of residual moisture. In this embodiment, the pressure in the vicinity of the outlet portion 5 can be controlled by the pressure adjusting mechanism 6 and the opening area adjusting mechanism 28, which will be described below, so that such problems can be easily dealt with.

The outlet portion 5 is provided with an opening 35 for discharging the raw material. In this embodiment, an adjustable opening area adjustment mechanism 28 is provided so that the area of the opening 35 can be changed. The opening area adjustment mechanism 28 can adjust the pressure of the raw material near the outlet 5 . FIG. 4 shows a schematic configuration of the opening area adjusting mechanism 28. As shown in FIG. FIG. 4(a) is a cross-sectional view of the opening area adjusting mechanism, showing a cross section taken along line AA in FIG. 4(b). 4(b) and 4(c) are side views of the opening area adjusting mechanism 28 as seen from the rotation axis direction of the screw 3. FIG. The opening area adjusting mechanism 28 has first and second discs 29 and 30 which are coaxial with the cylinder 2 and arranged adjacent to each other along the longitudinal axis X1 of the cylinder 2 . The first disk 29 and the second disk 30 are placed at the outlet 5 at the tip of the cylinder 2 so as to overlap each other along the direction of flow 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 disc 30 has a plurality of second through holes 32 . The through holes 31 and 32 are holes that form the opening 35 of the outlet portion 5 . The cross-sectional shape of the through holes 31 and 32 is circular, but is not limited to this, and may be square, hexagonal, elliptical, or the like. The number and arrangement of the through holes 31 and 32 in the first disk 29 and the second disk 30 are the same. More specifically, six inner through-holes 31a are provided at intervals of 60° on a first circle 33 concentric with the cylinder 2 on the first disk 29. Six outer through-holes 31b are provided at intervals of 60° on a second circle 34 having a large diameter. Six inner through holes 32a are provided at intervals of 60° on a first circle 35 concentric with the cylinder 2 on the second disk 30, and a second circular plate 30 having a larger diameter than the first circle 35 concentric with the cylinder 2 is provided. Six outer through-holes 32b are provided at intervals of 60° on a circle 36 of . The inner through-holes 31a, 32a and the outer through-holes 31b, 32b are circumferentially displaced from each other at an angle of 30°.

The first disk 29 can be rotated around the longitudinal axis X1 of the cylinder 2 by a rotation drive mechanism (not shown), and the second disk 30 is fixed with respect to the cylinder 2 . In another embodiment, the first disc 29 is fixed relative to the cylinder 2 and the second disc 30 can be rotated around the longitudinal axis X1 of the cylinder 2 by a rotary drive mechanism (not shown). . Alternatively, both the first disc 29 and the second disc 30 may be configured to rotate around the longitudinal axis X1 of the cylinder 2 . In either configuration, at least one of the first disk 29 and the second disk 30 is rotatable about the longitudinal axis X1 of the cylinder 2 with respect to the other disk. 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 disc 29 and the through hole 32 of the second disc 30 are completely overlapped, and the opening area from upstream to downstream of the dehydrator 1 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 shifted, thereby reducing the opening area. In FIG. 4C, the through hole 31 of the first disk 29 and the through hole 32 of the second disk 30 partially overlap, so the opening area is less than 100%. When the raw material is conveyed by the screw 3 with a small opening area, a higher pressure is applied to the raw material, and the high pressure state is released to the atmosphere through the opening 35. Therefore, the process from foaming to breakage occurs. more likely to occur. Since the optimum pressure to be applied to the raw material differs depending on the type of 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 sliding in the circumferential direction. The number of plates is also not limited to two as shown in the embodiment. The size, arrangement, and number of through-holes are not limited to those of the above embodiment.

Next, the dehydration process of the raw material by the dehydrator 1 will be described. A crumb-like raw material polymerized by polymerization is supplied to the dehydrator 1 through the hopper section 4 of the dehydrator 1 . The water contained in the crumb-like raw material or adhered to the crumbs is also introduced into the dehydrator 1 . Part of the moisture is discharged through the first discharge opening 23 .

A raw material charged from the hopper portion 4 of the dehydrator 1 is conveyed toward the outlet portion 5 by the screw 3 . A pressure adjusting mechanism 6 is provided in the middle. When the raw material approaches the vicinity of the pressure regulating mechanism 6 provided between the hopper portion 4 and the outlet portion 5, the raw material is propelled by the screw 3 while being prevented from being transported downstream by the pressure regulating mechanism 6. It is compacted or squeezed due to the application of force. As a result, the water contained in or adhered to the crumb is separated from the raw material and flows back toward the hopper section 4 . FIG. 5 shows the flow of raw material and water near the pressure regulation 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 moisture in the crumb is separated by providing a gap of an appropriate size. Water flows back into the hopper part 4 because its viscosity is significantly lower than that of the raw material. As shown in FIG. 6, the moisture flowing back toward the hopper 4 passes through the gaps between the crumbs of the raw material and is discharged out of the system from the first discharge opening 23 . Through the above steps, the raw material is compressed in the dewatering section 21, and the water content in the raw material immediately after passing through the pressure adjusting mechanism 6 is reduced to approximately 3 to 15% by weight. Appropriate water content ranges depend on the type of source material being treated.

The source material then enters the drying section 22 and is conveyed towards the outlet section 5 . As described above, while the raw material is compacted by the screw 3, the temperature rises due to self-heating due to the shearing action, and the residual moisture becomes compressed vapor. At the exit part 5, the raw material and the contained water are separated by expansion, and further dehydration is performed. If the water content is too high, it will remain in the raw material without being sufficiently vaporized, but in this embodiment, as shown in FIG. As described above, the water content of the raw material is reduced to less than 1% by weight, preferably less than 0.5%, on the downstream side of the flow path adjusting mechanism 6 .

The raw material thus treated is baled and sent to further processing for further post-processing steps.

1 Dehydrator 2 Cylinder 3 Screw 4 Hopper Section 5 Outlet Section 6 Channel Adjusting Mechanism 11 First Flat Plate 12 Second Flat Plate 21 Dehydrating Section 22 Drying Section 23 First Discharge Opening 24 Second Discharge Opening 25 Tilt Mechanism 26 Channel cross-sectional area gradually decreasing portion 27 Projection 28 Opening area adjusting mechanism F Channel X Longitudinal direction of cylinder

Claims (14)

a cylinder having a hopper section into which raw material, which is raw elastomer or raw rubber, is supplied, and an outlet section through which raw material having a reduced liquid content is discharged;
a screw that is rotationally driven within the cylinder and forms a flow path for the raw material together with the cylinder;
a flow channel adjustment mechanism positioned between the hopper portion and the outlet portion and capable of adjusting the cross-sectional area of the flow channel;
a second discharge opening positioned between the flow path adjusting mechanism and the outlet for discharging the liquid contained in the raw material to the outside of the cylinder;
An elastomer or rubber dewatering machine, wherein the second discharge opening is provided in at least the lower half of the cylinder in the vertical direction . The water content of the raw material is reduced to a range of 3% by weight or more and 15% by weight or less on the upstream side of the flow path adjustment mechanism, and the water content of the raw material is reduced to less than 1% by weight on the downstream side of the flow path adjustment mechanism. 2. The dehydrator of claim 1, which reduces. 3. The dehydrator according to claim 1, wherein said flow path adjusting mechanism has a pair of flat plates which are provided on both sides of said screw and which are capable of approaching and separating from said screw. 4. The cylinder according to any one of claims 1 to 3, wherein the cylinder has a first discharge opening positioned between the hopper portion and the flow path adjusting mechanism and discharging liquid to the outside of the cylinder. Dehydrator. 5. The dehydrator according to claim 4, wherein said first discharge opening is positioned closer to said hopper portion than said flow path adjusting mechanism. 6. The dehydrator according to any one of claims 1 to 5, wherein said second discharge opening is positioned closer to said flow path adjustment mechanism than said outlet portion. The cylinder has a channel cross-sectional area gradually decreasing portion located between the hopper portion and the channel adjustment mechanism, wherein the cross-sectional area of the channel decreases from the hopper portion toward the channel adjustment mechanism , The dehydrator according to any one of claims 1 to 6 . The dehydrator according to any one of claims 1 to 7 , 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 8 , wherein a groove is formed between the hopper portion on the inner surface of the cylinder and the channel adjustment mechanism. 10. The dehydrator according to any one of claims 1 to 9 , wherein said outlet section has an adjustable opening area adjustment mechanism so as to change the area of the opening through which said raw material is discharged. The opening area adjusting mechanism has first and second flat plates arranged adjacent to each other along the 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 arranged 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 varied. 11. A dehydrator according to claim 10, wherein said dehydrator is movable with respect to said flat plate of . 12. A dehydrator according to any one of claims 1 to 11, wherein said cylinder slopes downward from said outlet portion toward said hopper portion. 12. The dehydrator according to any one of claims 1 to 11, further comprising a tilting mechanism for tilting the cylinder from the outlet toward the hopper at a variable downward tilt angle. a cylinder having a hopper portion capable of supplying a raw material, which is raw elastomer or raw rubber, and an outlet portion discharging the raw material having a reduced liquid content;
a screw that is rotationally driven within the cylinder and forms a flow path for the raw material together with the cylinder;
a flow path adjustment mechanism positioned between the hopper portion and the outlet portion, the flow path adjustment mechanism being capable of adjusting the pressure on the upstream side and the downstream side of the flow path adjustment mechanism of the flow path;
a second discharge opening positioned between the flow path adjusting mechanism and the outlet for discharging the liquid contained in the raw material to the outside of the cylinder;
An elastomer or rubber dewatering machine, wherein the second discharge opening is provided in at least the lower half of the cylinder in the vertical direction .

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