JP2017018863A - Roller compactor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a roller compactor with which detailed adjustment of seal members is unnecessary and also checking the wear state of the seal members and exchange of the members are less frequent so that maintenance work thereof is easy.SOLUTION: In the roller compactor 1, a powder raw material is supplied to a raw material compaction area 13 by a screw feeder 3, and the powder raw material is compaction-granulated between raw material compression rollers 4a, 4b. A seal box 41 to which side seal mounting plates 47a, 47b and side seals 49a, 49b are mounted is disposed on the screw feeder 3 side of the rollers 4a, 4b. The side seal mounting plates 47a, 47b are disposed facing each other with a space provided therebetween on end surfaces 59 of the rollers 4a, 4b, and fixed to the seal box 41 via bolts 48. The side seals 49a, 49b are fixed to the side seal mounting plates 47a, 47b via bolts 50 and disposed between the roller end surfaces 59 and the side seal mounting plates 47a, 47b to seal both end surfaces of the rollers 4a, 4b in the raw material compaction area 13.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a powder processing apparatus used in a manufacturing process for pharmaceuticals, foods, chemical raw materials, synthetic resins, etc., and in particular, a powder raw material is compacted between rotating rollers for raw material compression, and a strip product (flakes). And a roller compactor (dry granulator) for continuously producing granular raw materials.

  2. Description of the Related Art Conventionally, a roller compactor that compresses and forms dry powder raw material by a pair of low-speed rotating rollers for compaction (hereinafter abbreviated as appropriate rollers) is known as an apparatus for compacting powder. The compacting method in roller compactors has advantages in terms of equipment and energy costs because it does not require humidification and drying processes and processing time is shorter compared to wet granulators that use water, alcohol, and solvents as binders. . In addition, since the roller compactor does not use an additive as a binder, it is used in a wide range of industrial fields regardless of inorganic or organic.

  As such a roller compactor, there has conventionally been a type in which a pair of rollers are arranged vertically, horizontally, or at an angle, and a powder raw material is quantitatively supplied to a raw material compaction region between the rollers by a screw feeder. It is common. The strip-like product generated by such a roller compactor is required to have various physical properties with respect to its hardness, thickness, brittleness, etc., depending on the use of the product, the production method in the subsequent process, and the like. For this reason, when producing a strip product with a roller compactor, with regard to items such as roller pressure and rotational speed, screw outer diameter, rotational speed, pitch, etc., the desired compaction processing is performed while appropriately selecting those optimum values. Is going.

  In addition, since a large amount of air is mixed in the powder raw material before compaction, the roller compactor escapes air from the raw material and, if necessary, deaerates by vacuum, so that the raw material compaction area before the roller The raw material is supplied continuously. At that time, in order to ensure that the powder raw material is supplied to the raw material compaction area formed in front of the pair of rollers without leaking to the surroundings, a compaction chamber surrounded by a partition wall having the same dimensions as the width of the roller is necessary. It becomes. As the shape and adjustment method of this compaction chamber, for example, methods as disclosed in Patent Documents 1 and 2 are known.

  In Patent Document 1, side seals (partition walls) are arranged along the side surfaces of a pair of rollers to form a sealed space. The powder raw material supplied to this space is engulfed by the pair of rotating rollers while receiving the supply pressure of the screw and the pressure by the rollers. In this process, pressure is similarly applied to the inner surface of the side seal disposed on the side surface of the roller. However, if this side seal spreads out against the internal pressure and a gap is formed between the side seals, the consolidated raw material may leak. The leaked raw material does not become a product, and the production yield deteriorates accordingly, and if there are many leaks, the pressure in the raw material compaction area decreases near the side seal, and the quality of the product discharged from the rollers varies. Occurs.

  For this reason, in the conventional roller compactor, a bolt is attached to the bearing box of the roller, and the side seal is pressed by the head of the bolt to prevent the side seal from spreading due to internal pressure. However, in such a configuration, since the bolt is arranged in a narrow space between the bearing box and the side seal, there is a problem that adjustment of the bolt position is difficult to perform and the operator's intuition must be relied upon.

  Therefore, Patent Document 1 proposes a method in which a pair of wedges are provided instead of the bolts, and one of the wedges is moved with a screw to adjust the position of the side seal so as to be in close contact with the roller side surface. In this case, since the screw for moving the wedge is arranged in a direction perpendicular to the roller shaft and extends toward the space on the raw material discharge side, maintenance is easy, and even an unskilled person can make an appropriate adjustment. Yes. In addition, the system which presses a side seal by moving a wedge using oil_pressure | hydraulic with the structure similar to patent document 1 is also known.

  Although Patent Document 2 is limited to small machines, a side seal is provided on the side surfaces of a pair of rollers and a top seal that covers the upper side of the rollers is provided to create a sealed space between the rollers. Prevents leakage. Here, a circumferential groove-shaped seal mounting portion is formed by a guide member mounted on the roller side surface and the roller shaft, and a synthetic resin side seal is mounted on the seal mounting portion. The side seal contacts the end face of the roller and seals the side of the compacted space. A top seal made of synthetic resin is attached above the side seal, and the top of the compaction space is sealed by covering the top of the roller with this top seal.

Utility Model Registration No. 2146224 JP 2004-237296 A

  However, the method of pressing the side seal with a screw or hydraulic pressure as in Patent Document 1 has a problem that if the pressing force is too strong, the side seal excessively contacts the roller, and thus wear easily occurs. In addition, if the wear is large, the powder of the side seal material or the like may be mixed into the raw material, and excessive contamination (foreign matter mixing) may occur. On the other hand, when the pressing force is too low, the compacted raw material leaks from the gap in front of the roller, and as described above, the production yield deteriorates and the product quality varies. For this reason, although the adjustment work itself with screws and hydraulic pressure is simple, adjustment of the contact pressure still requires troublesome tips and experience.

  In this respect, the apparatus of Patent Document 2 does not require troublesome adjustment, but the side seal fitted on the side surface of the roller is pressed against the flange surface of the roller by the pressure in the compaction space, and the contact portion is worn. As a result, the thickness of the resin seal is reduced, a gap is formed between the roller end faces, and the amount of powder leakage may increase. In the case of the structure of Patent Document 2, the inner surface of the top seal is always in contact with the guide portion of the rotating roller end or the top of the flange of the roller. For this reason, the top seal is worn to change the size and the sealing performance is deteriorated, and there is a concern that the resin wear powder is mixed into the raw material. In this case, the small machine is often used for an experiment and the operation time is short, so that the period until such a phenomenon occurs becomes long, so that there is not much trouble in actual operation. However, when the configuration of Patent Document 2 is adopted for a production machine, the wear life and contamination of the seal member become a problem even in a small machine.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a roller compactor that does not require fine adjustment of a seal member and that is easy to maintain with less frequent check of the seal member and less frequent replacement of members.

  A roller compactor according to the present invention includes a raw material hopper for storing and supplying a powder raw material, and a pair of raw material compression rollers that are disposed at a predetermined interval from the raw material hopper and are rotatable about a rotating shaft. A screw feeder that is disposed between the raw material hopper and the raw material compression roller and feeds the powder raw material stored in the raw material hopper between the pair of raw material compression rollers; A raw material compaction region formed between an end of the raw material compression roller side of the screw feeder and the raw material compression roller, and supplying the powder raw material to the raw material compaction region by the screw feeder, A roller compactor for compacting and granulating the powder material between opposing roller surfaces of the rotating material compression roller, wherein the roller compactor comprises the material compression roller. A seal box that is disposed on the screw feeder side of the roller and covers the screw feeder side of the raw material compaction region, and one end side is attached to the seal box, and is spaced from both axial end surfaces of the raw material compression roller. The side seal mounting plate disposed oppositely, and disposed between the side seal mounting plate and the axial end surface of the raw material compression roller, and one end side thereof is mounted on the side seal mounting plate, in the raw material compaction region And a side seal that seals the both end faces of the raw material compression roller.

  In the present invention, a seal box in which a side seal mounting plate and a side seal are attached is disposed on the screw feeder side of the raw material compression roller. Side seal mounting plates that are opposed to each other with a gap are attached to both end surfaces in the axial direction of the raw material compression roller. Further, the side seal mounting plate is attached with a side seal disposed between the axial end surface of the raw material compression roller and the side seal mounting plate, and this side seal allows both end surface sides of the raw material compression roller in the raw material compaction region to be attached. Seal.

  In the roller compactor, an axial collar disposed adjacent to the raw material compression roller is provided on each of both ends in the axial direction of the pair of raw material compression rollers, and a disk-shaped flange portion is provided on the axial collar. A small diameter portion formed smaller in diameter than the flange portion and disposed adjacent to an axial end surface of the raw material compression roller, and the other end side of the side seal is connected to the flange portion by the small diameter portion. You may make it accommodate in the recessed part formed between the axial direction end surfaces of the said raw material compression roller.

  Further, the other end side of the side seal mounting plate is disposed in a gap formed between the flange portions of the adjacent shaft collars so that the side seal mounting plate does not contact the rotating shaft collar. You may form the width | variety of the said other end side of this side seal attachment plate smaller than the width | variety of the said gap | interval.

  Further, the seal box is provided with a roller surface seal disposed so as to face the roller surface of the raw material compression roller, and the roller surface seal is disposed in a state where the tip portion is slightly spaced from the roller surface. The roller surface direction side in the raw material compaction region may be sealed.

  In addition, the seal box is attached to and removed from the front side of the raw material compaction region with the side seal mounting plate, the side seal fixed to the side seal mounting plate, and the roller surface seal attached to the seal box. It may be arranged as possible.

  According to the roller compactor of the present invention, the seal box is disposed on the screw feeder side of the raw material compression roller, and the side seals are disposed opposite to the seal box at both ends in the axial direction of the raw material compression roller. Attach the mounting plate, and attach side seals arranged between the axial end surface of the raw material compression roller and the side seal mounting plate to the side seal mounting plate, and both side surfaces of the raw material compression roller in the raw material compaction region by the side seals. Since the sides are sealed, it is possible to easily and reliably form a raw material compacted region in which the raw material does not leak and the internal pressure is uniform. Thereby, in order to prevent leakage of the compacted material, it is not necessary to make fine adjustments by pressing the seal member to the side surface of the roller with bolts or wedges, and even a non-skilled person can easily use the roller compactor.

It is explanatory drawing which shows the structure of the roller compactor which is one embodiment of this invention. It is explanatory drawing which shows the structure of the left side surface of the roller compactor of FIG. It is sectional drawing of a bearing unit, and has shown the cross section along the BB line of FIG. It is sectional drawing along the AA line of FIG. It is explanatory drawing which looked down at the whole seal structure around a roller in the state which removed components It is the external view seen from the position of CC of FIG. It is an external view which shows the state which removed the side seal attachment plate and the shaft collar from the state of FIG. It is an external view which shows the state which further removed the side seal from the state of FIG.

  Embodiments of the present invention will be described below. 1 and 2 are explanatory views showing a configuration of a roller compactor 1 according to an embodiment of the present invention. As shown in FIGS. 1 and 2, a roller compactor 1 according to the present invention includes a conical raw material hopper 2 in which a powder raw material (not shown) is stored, and a downward direction from the raw material hopper 2 (the tip in the raw material feeding direction). And a pair of raw material compression rollers 4a and 4b (hereinafter abbreviated as rollers 4a and 4b) disposed below the screw feeder 3. Here, the rollers 4a and 4b are arranged in a horizontal (left and right) direction, and a crusher 5 and a granulator 6 are provided below the rollers 4a and 4b. The rollers 4a and 4b, the crusher 5 and the granulator 6 are attached to a frame 7, and a transparent front transparent cover 8 is mounted on the front surface of the rollers 4a and 4b. A touch panel 9 is attached to the gantry 7, and the operation of the roller compactor 1 can be operated by the touch panel 9.

  The screw feeder 3 in the raw material hopper 2 is driven by a screw driving motor 11 installed on the upper surface of the hopper. The rotation of the screw driving motor 11 is transmitted to the screw feeder 3 via the screw driving speed reducer 12. When the screw feeder 3 is rotationally driven by the screw driving motor 11, the powder raw material in the raw material hopper 2 is sent downward. The lower end portion of the screw feeder 3 extends to the vicinity of the rollers 4a and 4b, and the powder raw material is supplied to the raw material compaction region 13 formed in front of the rollers 4a and 4b by the rotation of the screw feeder 3. On the outer peripheral surfaces of the rollers 4a and 4b, a roller surface 14 is formed in which fine grooves are cut along the axial direction, and the powder raw material supplied to the raw material compaction region 13 is between the opposing roller surfaces 14. Introduced and consolidated.

  In the roller compactor 1, the rotating shafts 21a and 21b of the rollers 4a and 4b are juxtaposed in the horizontal direction. The rotary shafts 21a and 21b are supported by bearing units 22a and 22b disposed on the top of the gantry 7, and rollers 4a and 4b are attached to the tips thereof. The rotary shafts 21a and 21b are connected to a roller drive shaft 24 via a gear mechanism 23 and are driven to rotate in different directions. The roller drive shaft 24 is rotationally driven by a roller drive motor 26 via a roller drive speed reducer 25. The bearing units 22 a and 22 b and the roller drive speed reducer 25 are accommodated in an upper cover 27 attached to the upper portion of the gantry 7.

  As shown in FIG. 3, bearings 31a and 31b are accommodated in the bearing units 22a and 22b, and the rotary shafts 21a and 21b are rotatably supported by the bearings 31a and 31b. The bearing unit 22 a is fixed to the gantry 7 so that it does not move on the gantry 7. Thus, the roller 4a on the bearing unit 22a side is disposed on the gantry 7 while being fixed together with the rotating shaft 21a. On the other hand, the bearing unit 22b is arranged so as to be movable in the X direction (horizontal direction) in FIG. 3 within the frame 32 fixed on the gantry 7. A slide guide 33 is provided in the frame 32, and the bearing unit 22 b moves in the X direction along the slide guide 33. Therefore, the roller 4b on the bearing unit 22b side is disposed on the gantry 7 in a state of being movable in the X direction.

  A hydraulic cylinder 34 and a piston 35 are further provided in the frame 32. One end of the piston 35 is attached to the bearing unit 22b. High pressure oil is supplied to the hydraulic cylinder 34 from a hydraulic pump 36 via a hydraulic system (not shown). When the high pressure oil is supplied to the hydraulic cylinder 34, the bearing unit 22b is pressed rightward in the figure by the piston 35. As a result, the pressure supplied to the hydraulic cylinder 34 is applied to the roller 4b via the bearing unit 22b, and the roller 4b is in pressure contact with the fixed roller 4a at a predetermined pressure.

  In the roller compactor 1, the powder raw material supplied to the raw material compaction region 13 by the screw feeder 3 is bitten between the rollers 4a and 4b rotating in opposite directions. At that time, the roller 4b is pressed against the roller 4a by hydraulic pressure, and the powder raw material is pressed between the rollers 4a and 4b rotating while resisting the pressure of the raw material. In this process, the powder raw material is compacted by receiving pressure, and becomes a lump depending on the shape of the plate or the groove on the roller surface from the powder state and is discharged from the rollers 4a and 4b. The products discharged from the rollers 4a and 4b are crushed into coarse particles by the crusher 5, and further sized into particles having a desired particle size by the particle sizer 6.

  4 is a cross-sectional view taken along the line AA in FIG. 1, and FIG. 5 is an exploded perspective view showing a structure around the roller. A synthetic resin seal box 41 is attached to the tip of the screw feeder 3 as an inlet side seal member of the raw material compaction region 13. A screw insertion hole 42 through which the screw feeder 3 is inserted is formed through the seal box 41 in the vertical direction. The lower end surface of the seal box 41 is disposed between the rollers 4a and 4b, and a raw material compaction region 13 is formed below the seal box 41 between the rollers 4a and 4b. The seal box 41 is placed on a table 43 attached to the gantry 7, and is fixed on the table 43 by the knob bolt 44 together with the raw material hopper 2. The table 43 is fixed to the upper end portion of the partition wall 45 attached to the front end surface of the gantry 7. A front fluoroscopic cover 8 is attached to the front side of the table 43.

  At the lower part of the seal box 41, step portions 46 are formed on the front side and the back side. A bolt insertion hole 60 is provided in the stepped portion 46, and metal (for example, stainless steel plate) side seal mounting plates 47 a and 47 b are firmly attached by the bolt 48 through the bolt insertion hole 60. Side seals 49a and 49b made of synthetic resin are disposed inside the side seal mounting plates 47a and 47b (on the rollers 4a and 4b side). The side seals 49a and 49b are fixed to the side seal mounting plates 47a and 47b by bolts 50 at the upper end side (one end side). As shown in FIG. 4, the side seals 49 a and 49 b are attached so that their upper ends 51 come into contact with the lower end 52 of the seal box 41.

  The width of the side seal mounting plates 47a and 47b and the side seals 49a and 49b is narrower on the lower end side than on the upper end side. The side seal mounting plates 47a and 47b and the side seals 49a and 49b are fixed at the upper ends, and the lower ends (tips) are overhang portions 53 and 54, respectively. The width W of the overhang portion 53 of the side seals 49a and 49b is wider than the width h of the overhang portion 54 of the side seal mounting plates 47a and 47b.

  Metal shaft collars 55a, 55b, 56a, 56b are attached to both end surfaces of the rollers 4a, 4b, adjacent to the rollers 4a, 4b, respectively. The shaft collar 55a and the like are composed of a disc-shaped flange portion 57 and a small-diameter portion 58 formed with a smaller diameter than the flange portion. The small diameter portion 58 is disposed adjacent to the end surfaces 59 of the rollers 4a and 4b, and concave portions 61a, 61b, 62a and 62b are formed between the small diameter portions 58 and the end surfaces 59. The lower ends (the other end sides) of the side seals 49a and 49b are fitted into the recesses 61a and 61b and 62a and 62b. The lower end sides of the side seal mounting plates 47a and 47b are accommodated in a gap 63 formed between the flange portions 57 such as the shaft collar 55a. The width h of the overhang portion 54 located on the other end side of the side seal mounting plates 47a and 47b is slightly smaller than the width H of the gap 63, and the shaft collar 55a on which the side seal mounting plates 47a and 47b rotate, etc. It is supposed not to touch.

  On both side surfaces of the lower portion of the seal box 41, roller surface seal mounting portions 64 are recessed. Synthetic resin roller surface seals 65 a and 65 b are attached to the roller surface seal attachment portion 64. The roller surface seals 65a and 65b are attached with their tip portions slightly spaced from the roller surfaces 14 of the rollers 4a and 4b, and are firmly fixed to the seal box 41 with bolts 66. Since the roller surface seals 65a and 65b have a slight overhang size, they are difficult to spread outward even when internal pressure from the raw material compaction region 13 is applied. Also, if the roller face seals 65a and 65b move in the direction of spreading, the roller face seals 65a and 65b are slightly in contact with the outer peripheral surfaces of the rollers 4a and 4b, and the sealing property of the raw material compaction region 13 is maintained. Is done. In other words, the roller face seals 65a and 65b make the sealing property on the side of the seal box 41 very high.

  In the roller compactor 1, by using such a seal box 41, the raw material compaction region 13 is formed by the side seal mounting plates 47a and 47b, the side seals 49a and 49b, and the roller surface seals 65a and 65b. The raw material compaction region 13 is a sealed space by each seal, and when the powder raw material is supplied to the raw material compaction region 13 by the screw feeder 3, the pressure is maintained. At this time, when the side seals 49a and 49b move so as to spread without resisting the internal pressure, the side seal mounting plates 47a and 47b prevent the deformation. The side seal mounting plates 47a and 47b are high-strength metal members that are firmly attached to the seal box 41 by bolts 48, whereby the side seals 49a and 49b are supported from the outside, and deformation due to internal pressure is suppressed. It is done.

  Further, since the overhang portion 53 of the side seals 49a, 49b is fitted into the recess 57a between the rollers 4a, 4b and the shaft collar 55a, etc., the side seals 49a, 49b can be easily attached to the side surfaces of the rollers 4a, 4b. Can be set accurately and accurately. Therefore, there is almost no gap between the rotating end surface 59 of the rollers 4a and 4b and the side seals 49a and 49b, and it is possible to prevent the powder from leaking out between the two. Thereby, the pressure of the raw material compaction area | region 13 is kept uniform inside. As described above, the overhang portions 54 of the side seal mounting plates 47a and 47b are accommodated in the gap 63 and do not contact the rotating shaft collar 55a or the like.

  On the other hand, when the powder raw material is supplied to the rollers 4a, 4b, the distance between the centers of the rollers 4a, 4b and the shaft collars 55a, 55b, 56a, 56b is the thickness of flakes (3-4 mm) generated against hydraulic pressure. ) Spreads a considerable distance. Therefore, in the roller compactor 1, the depth of the recesses 61a, 61b, 62a, 62b such as the shaft collar 55a is set to about 7 to 8 mm, and the side seals 49a, 49b are fitted into the recesses 61a, 49b without any gaps. Thereby, even if the roller 4b moves 3 to 4 mm horizontally, the side seals 49a and 49b are not detached from the recess 61a and the like, and the sealed state of the raw material compaction region 13 is maintained.

  As described above, in the roller compactor 1 according to the present invention, by using the seal box 41 as described above, the material compaction region 13 with no internal material leakage and uniform internal pressure can be easily and reliably formed. Is possible. In addition, since the entire seal member is mounted on the seal box 41 and it is not necessary to place the seal member directly against the rotating rollers 4a and 4b, the wear state of the seal member and the frequency of replacement of the member are low. In addition, the probability of occurrence of contamination due to wear of the seal member is very low. In addition, in order to prevent leakage of the compacted material due to internal pressure, it is not necessary to make fine adjustments by pressing the seal member with bolts or wedges against the roller side surface, so even an unskilled person can easily use the device. It becomes possible.

  Furthermore, since the roller compactor according to the present invention employs a configuration in which a seal member that forms a compaction space is attached to the seal box 41, sealing of the compaction space can be achieved only by attaching and detaching the box member. For this reason, the compaction space can be accurately formed even in an apparatus in which the arrangement of the rollers is any one of up / down, left / right (horizontal), and inclination, and a wide range of development is possible.

  In addition, since the seal box 41 is only placed on the table 43, if the two knob bolts 44 are removed by hand, the seal box 41 and all of the seal members attached thereto remain in the attached state. It can be easily pulled out. Accordingly, maintenance around the rollers 4a and 4b is facilitated, and a series of seal members can be easily cleaned, attached and detached.

It goes without saying that the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the invention.
For example, in the above-described embodiment, the roller compactor in which the raw material compression rollers are horizontally (left and right) is described as an example. However, as described above, the roller compactor in which the rollers are vertically disposed or the rollers are obliquely disposed. The present invention can also be applied to roller compactors juxtaposed to each other. In addition, when a roller is arrange | positioned up and down or diagonally, the downward direction in the above-mentioned embodiment becomes a direction (tip side of a raw material feed direction) in which a powder raw material is sent.

  Also, instead of the synthetic resin side seal described above, it is also possible to use a side seal made of surface-treated steel plate, tungsten carbide, high wear-resistant ceramic, etc., as long as it has a low coefficient of friction with the roller. It becomes. Furthermore, instead of the metal side seal mounting plate described above, a plate-like member made of a hard synthetic resin or ceramic, or a composite material such as a metal and a synthetic resin is also used if it is a high-strength member with high bending rigidity. Is possible. In that case, you may make it raise bending rigidity by providing a rib and a bending part suitably in a side seal attachment plate. If degassing by vacuum is effective due to the nature of the powder raw material, it is possible to mount a degassing filter 67 or the like in the seal box 41.

  The present invention can be widely applied not only to pharmaceuticals but also to the production of granulated materials as raw materials for foods, fertilizers, chemical raw materials, synthetic resins and the like.

DESCRIPTION OF SYMBOLS 1 Roller compactor 2 Raw material hopper 3 Screw feeder 4a, 4b Raw material compression roller 5 Crusher 6 Granulator 7 Base 8 Front see-through cover 9 Touch panel 11 Screw drive motor 12 Screw drive speed reducer 13 Raw material compaction area 14 Roller surface 21a , 21b Rotating shafts 22a, 22b Bearing unit 23 Gear mechanism 24 Roller drive shaft 25 Roller drive speed reducer 26 Roller drive motor 27 Upper cover 31a, 31b Bearing 32 Frame 33 Slide guide 34 Hydraulic cylinder 35 Piston 36 Hydraulic pump 41 Seal box 42 Screw insertion hole 43 Table 44 Knob bolt 45 Bulkhead 46 Step 47a, 47b Side seal mounting plate 48 Bolt 49a, 49b Side seal 50 Bolt 51 Upper end 52 Lower end 53 Overhang portion 54 Overhang 55a, 55b-axis color (front side)
56a, 56b Shaft collar (rear side)
57 Flange portion 58 Small diameter portion 59 Roller end surface 60 Bolt insertion holes 61a, 61b Recesses 62a, 62b Recess 63 Clearance 64 Roller surface seal mounting portions 65a, 65b Roller surface seal 66 Bolt 67 Filter

Claims (5)

A raw material hopper for storing and supplying powder raw materials;
A pair of raw material compression rollers disposed at a predetermined interval from the raw material hopper and provided rotatably about a rotation axis;
A screw feeder that is disposed between the raw material hopper and the raw material compression roller and feeds the powder raw material stored in the raw material hopper between the pair of raw material compression rollers;
A raw material compaction region formed between an end of the screw feeder on the raw material compression roller side and the raw material compression roller; and
A roller compactor that supplies the powder raw material to the raw material compaction region by the screw feeder and compacts and granulates the powder raw material between opposed roller surfaces of the rotating raw material compression roller;
The roller compactor
A seal box disposed on the screw feeder side of the raw material compression roller and covering the screw feeder side of the raw material compaction region;
One end side is attached to the seal box, and a side seal attachment plate is disposed opposite to each other at both ends in the axial direction of the raw material compression roller;
It is arranged between the side seal mounting plate and the axial end surface of the raw material compression roller, and one end side is attached to the side seal mounting plate, and the both end surface sides of the raw material compression roller in the raw material compaction region And a side seal for sealing the roller compactor. The roller compactor according to claim 1, wherein the roller compactor further comprises:
Each of the pair of raw material compression rollers has an axial collar disposed adjacent to each of the raw material compression rollers on both axial ends.
The shaft collar includes a disk-shaped flange portion, and a small diameter portion formed smaller in diameter than the flange portion and disposed adjacent to the axial end surface of the raw material compression roller,
The other end side of the side seal is accommodated in a recess formed between the flange portion and the axial end surface of the raw material compression roller by the small diameter portion. The roller compactor according to claim 2,
The other end side of the side seal mounting plate is disposed in a gap formed between the flange portions of the adjacent shaft collars,
The roller compactor characterized in that the width of the other end side of the side seal mounting plate is smaller than the width of the gap so that the side seal mounting plate does not contact the rotating shaft collar. The roller compactor according to any one of claims 1 to 3,
The seal box has a roller surface seal disposed facing the roller surface of the raw material compression roller,
The roller surface seal is attached in a state where a tip portion thereof is slightly spaced from the roller surface, and seals the roller surface direction side in the raw material compaction region. The roller compactor according to claim 4,
The seal box is detachably disposed at a front stage of the raw material compaction region in a state where the side seal mounting plate, a side seal fixed to the side seal mounting plate, and the roller surface seal are mounted. Roller compactor characterized by

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