JP2006056204A - Apparatus for removing burr of tablet - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an apparatus for removing burrs of tablets capable of furthermore improving removing efficiency of fine powder or the like stuck on the tablets, eliminating generation of metal foreign substances, more improving workability and maintenance properties, and corresponding to further finer pitch formation. <P>SOLUTION: The apparatus 31 for removing the burrs of the tablets is composed of at least a freely rotatable cylindrical inclined drum 34, a pair of rotating shafts 52a and 52b, a supporting frame body fitted with a hood 39 storing the whole inclined drum 34, and a driving mechanism for rotatably driving the inclined drum 34. Flanges 36a and 36b are respectively formed around both end parts of the inclined drum 34. Rollers 55a-55d are respectively fixed on both ends in a supporting frame body of a pair of the rotating shafts 52a and 52b, and on one end part projected from the hood 39, a pulley with a gear is fixed. A driving force of a driving motor of the driving mechanism is transmitted to a pair of the rotating shafts 52a and 52b by a method for transmission utilizing a timing belt, and in addition, the inclined drum 34 is stably rotated by bringing the rollers 55a-55d into contact with the flanges 36a and 36b. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a deburring device for removing burrs generated in a tablet made of a molding material.

  When sealing semiconductor elements such as diodes and integrated circuits using thermosetting resins such as epoxy resins, phenolic resins, and unsaturated polyester resins, transfer is performed using tablets of molding materials of these thermosetting resins. A method of sealing by molding is generally used. The tablet is preferably formed in an accurate predetermined shape that fits almost completely in a predetermined portion (pot) of the molding machine with no gap, in order to reduce void defects in the molded product. For this reason, it is desirable to almost completely remove burrs generated during tablet formation.

  The present applicant has previously proposed a deburring device that can continuously and effectively remove burrs generated in a tablet of molding material (Patent Document 1). This deburring device uses a rotatable cylindrical inclined drum, and this inclined drum is used to discharge a tablet at one end and a tablet insertion opening for discharging the tablet at the other end. It has a tablet discharge port, a plurality of opening holes for removing burrs are formed on the curved side surface between both ends, a baffle plate is attached to the inner wall of the inclined drum, and it is rotated by a motor It has become. The burrs are continuously and effectively removed while the tablet moves from upstream to downstream in the rotating inclined drum.

  On the other hand, the present applicant has proposed a tablet deburring device with further improvements in order to make the deburring efficiency more excellent and to remove the generated fine powder more efficiently (Patent Document 2). FIG. 6 is a partially cutaway perspective view showing the main part of the deburring device for this tablet.

  As shown in FIG. 6, this tablet deburring device 1 is provided with a tablet insertion port 2 at one end and a tablet discharge port 3 at the other end, and can be rotated by a rotation drive means such as a motor. The inclined drum 4 is stored in a hood 5. In this example, the inclined drum 4 has a hexagonal cross section, and a large number of opening holes 13 for peeling and removing the burr of the tablet are formed on the side surfaces between both ends.

  On the wall surface in the inclined drum 4, baffle plates 7a and 7b for adjusting the amount of flow of the tablet are provided. Also, near each baffle plate 7a, 7b is an air blow injection means for blowing fine burr crushed material and fine powder adhering to the tablet temporarily staying at these baffle plates 7a, 7b to the upstream side by air. Some nozzles 8a and 8b are attached, and the nozzle 9 is also attached to the tablet discharge port 3 side. Further, a charging chute 15 for loading the tablet is provided on the tablet loading port 2 side, and a flow rate adjusting plate 10 for adjusting the loading speed of the tablet is attached to the tip thereof. A discharge chute 16 for discharging the tablet is provided on the tablet discharge port 3 side. Further, the hood 5 has two dust collection ports 11a and 11b on its side, and a recovery port 12 for sucking and collecting burrs peeled and removed from the tablet, fine powder, and broken tablet fragments at the bottom. I have.

In the tablet deburring device of FIG. 6, since the inner surface of the inclined drum 4 is formed by crossing six planes, the tablet rolls without sliding on the inner surface during the rotation of the inclined drum 4, and in the process Since burrs are peeled and removed, more efficient deburring can be performed. Furthermore, by attaching the nozzles 8a, 8b and 9 which are air blow injection means and installing the dust collection ports 11a and 11b and the collection port 12, it becomes possible to more efficiently remove fine powders and the like resulting from deburring. .
JP-A-8-99314 JP 2003-127147 A

  However, while deburring the tablet for a long time using the deburring device configured as described above, it has been found that there is room for further improvement as described below regarding the drive mechanism of the inclined drum. It was.

  In the tablet deburring apparatus using the inclined drum as shown in FIG. 6, it is possible to efficiently remove the generated fine powder and the like. However, for example, in recent semiconductor substrate mounting, what was conventionally TAB (tape automated bonding) has been made fine pitch like COF (chip on film). This fine pitch is expected to be further developed in the future. In order to cope with such further fine pitches in the future, it is desired to further improve the removal efficiency of fine powder and the like. In order to further improve the removal efficiency of fine powder and the like, it is necessary for the inclined drum to rotate stably at a constant speed over a long period of time, and this involves the driving mechanism of the inclined drum.

  On the other hand, recently, in order to further improve the drum detachment workability during the switching cleaning, the rotation of the inclined drum is performed by a drive mechanism as shown in FIG.

That is, in this drive mechanism, a drive motor (not shown) is attached in the hood 5, and a metal gear 21 is fixed to the drive shaft. On the other hand, annular flanges 22a (not shown) and 22b are formed on the outer periphery of both end portions 4a (not shown) and 4b of the inclined drum 4 having a hexagonal cross section, and the inside of one flange 22b. On the other hand, a metal gear 23 having saw-tooth teeth is provided integrally with the inclined drum 4 over the entire outer periphery. Further, the flanges 22a and 22b of the inclined drum 4 are rotatably supported by a pair of rollers 24a ₁ and 24a ₂ (not shown); rollers 24b ₁ and 24b ₂ , respectively. In addition, the rotation of the tilting drum 4 is caused by the direct engagement between the metal gear 21 fixed to the drive shaft of the drive motor and the metal gear 23 provided integrally with the tilting drum 4. Is transmitted to the inclined drum 4 so that the inclined drum 4 rotates.

  However, since the drive mechanism as described above is installed in the hood 5 and is a metal direct drive between the metal gear 23 of the inclined drum 4 and the metal gear 21 of the drive motor, metal foreign matter may be generated. If it accumulates in the hood 5 or the inclined drum 4, it adheres to the tablet and becomes contaminated with foreign matter. Therefore, in order to cope with the fine pitch material, it is necessary to improve the above factors. Further, since the metal gears 21 and 23 are directly connected to the metal, the metal gear 21 or 23 is loaded by an impact or a rotational load, and the rotation of the inclined drum 4 fluctuates due to the load, and as a result, fine powder and the like are removed. It may affect the further improvement of efficiency. Furthermore, the generated metal foreign matter and the remaining fine powder affect the maintainability of the tablet deburring device, so there is room for further improvements in the drive mechanism in order to continue operation for a longer period of time. was there.

  Therefore, the present invention has been made in view of the circumstances as described above, and further improves the removal efficiency of fine powder and the like adhering to the tablet, eliminates the generation of metallic foreign matter, and further improves workability and maintainability. It is an object of the present invention to provide a deburring device for a tablet that can cope with further fine pitch in the future.

  The invention of the present application is, firstly, in a tablet deburring device, a tablet insertion port for inserting a tablet into one end, a tablet discharge port for discharging a tablet at the other end, A rotatable cylindrical inclined drum with a plurality of opening holes for removing burrs on the side surface between them and a flange around each end, and a hood for storing the entire inclined drum And both ends of the support frame are rotatably supported by the support frame, a part of one end protrudes to the outside of the hood, and a flange of the inclined drum is formed at both ends of the support frame. A pair of rotating shafts, each of which is in contact with the peripheral surface, are fixed to each other, are inclined to the inclination of the inclined drum below the inclined drum, and are spaced apart in parallel. A hood comprising a geared pulley fixed to the protruding end of the rotating shaft and a timing belt that meshes with the gear of the driving motor and the geared pulley to transmit the rotational driving force of the driving motor to the pair of rotating shafts. And a drive mechanism provided on the outside of the head.

  According to a second aspect of the present invention, in the first invention, the outer peripheral portion of the roller fixed to the pair of rotating shafts is formed using a material having a larger friction coefficient than the material of the flange of the inclined drum. And

  According to a third aspect of the present invention, in the first or second aspect of the invention, a drum pressing mechanism for pressing at least one end of the inclined drum from above is attached.

  Further, fourthly, in any one of the first to third inventions, an air blow for ejecting air containing electrostatic removal ions in order to blow away the crushed burr and fine particles adhering to the tablet to the upstream side. Injecting means is attached.

  According to the tablet deburring device of the present invention, the drive mechanism is disposed outside the hood, and the rotational driving force of the drive motor is reliably transmitted to the inclined drum via the pair of rotating shafts. Since it can be rotated stably at a constant speed over a period of time, the removal efficiency of fine powder etc. is further improved, the generation of fine powder etc. on the tablet is suppressed as much as possible, and the occurrence of metallic foreign matter in the deburring device is eliminated Moreover, workability and maintainability can be further improved, and it is possible to cope with fine pitch.

  In addition, by using a material with a large friction coefficient on the outer periphery of the rollers fixed to the pair of rotating shafts, or by attaching a drum pressing mechanism that presses the inclined drum from above, the sliding between the rotating shaft and the inclined drum is further improved. It can prevent effectively and can suppress further adhesion of the fine powder etc. to a tablet.

  Furthermore, the removal efficiency of fine powder or the like can be further enhanced by attaching an air blow jetting means for jetting air containing electrostatic removal ions.

  The present invention has the features as described above, and an embodiment thereof will be described below.

  FIG. 1 is a perspective view showing a part of an embodiment of a tablet deburring device according to the present invention with a part cut away, and FIG. 2 is a front view of a drive mechanism in the embodiment as seen from the tablet discharge port side. FIG. 3 is a front view of the rotary shaft attachment site in the same embodiment as seen from the tablet inlet side, and FIG. 4 is a diagram showing the roller attached to the rotary shaft and the flange of the inclined drum in the same embodiment. FIG. 5 is a perspective view illustrating a drum pressing mechanism according to the embodiment.

  The tablet deburring device 31 of the present invention is a rotatable cylindrical shape provided with a tablet insertion port 32 for loading a tablet at one end and a tablet discharge port 33 for discharging the tablet at the other end. The inclined drum 34 is provided. The main body 34 'of the inclined drum 34 has a hexagonal cross section, and a plurality of opening holes 35 for peeling and removing burrs are formed on the side surfaces between both ends, and an annular flange 36a is formed around both ends. , 36b are provided. The outer peripheral surfaces of the flanges 36a and 36b are contact portions 37a and 37b. The tilt angle of the tilt drum 34 is appropriately set according to the size, shape, and type of the tablet to be deburred, but is usually set to an angle of 2 to 15 degrees. A plurality of support rods 38 (not shown in FIG. 1, see FIG. 4) are spanned between the flanges 36a and 36b. The material of the inclined drum 34 is preferably a material such as a steel material that can withstand repeated use, has high rigidity so that the tablet rolls, and has high wear resistance. The entire inclined drum 34 is accommodated in a support frame 40 (not shown in FIG. 1, see FIGS. 2 and 3) to which a hood 39 is attached. In this embodiment, the inclined drum 34 has a hexagonal cross section. However, the invention is not limited to this, and the inclined drum 34 is not limited to a polygonal shape such as a triangular shape, a quadrangular shape, an octagonal shape, or a cylindrical shape. Can also be used.

  On the wall surface in the inclined drum 34, baffle plates 41a and 41b for adjusting the flow amount of the tablet are provided. The overhang height of the baffle plates 41a and 41b is suitably about 1 to 2 times the size of the tablet to be inserted. Further, as shown in FIG. 1, nozzles 42a and 42b, which are air blow spraying means for blowing away crushed debris, fine powder and the like adhering to the tablets temporarily staying on the baffle plates 41a and 41b to the upstream side as shown in FIG. , 41b, and a nozzle 43 is also mounted near the tablet outlet 33. In this embodiment, static elimination ions are contained in the air ejected from the nozzles 42a, 42b, and 43. Air containing electrostatic removal ions can be generated by the same principle as a commercially available air blower for electrostatic removal. In this way, static electricity is removed from static burrs and fine powder, which prevents static burrs and fine powder from adhering to the tablet, further improving the efficiency of removing crushed burr and fine powder. Can do.

  A charging chute 44 for loading the tablet is provided on the tablet loading port 32 side, and a flow rate adjusting plate 45 for adjusting the loading speed of the tablet is attached to the tip. A discharge chute 46 for discharging the tablet is provided on the tablet discharge port 33 side. Further, the hood 39 has two dust collection ports 47a and 47b on its side, and a recovery port 48 for sucking and collecting burrs peeled and removed from the tablet, fine powder, and broken tablet fragments at the bottom. I have.

On the other hand, as shown in FIG. 3, a shaft support plate 50a is attached between two vertical frames 40a ₁ and 40a ₂ extending in the vertical direction of the support frame 40 on the front side (tablet inlet side), Further, as shown in FIG. 2, a shaft support plate 50b is also attached between two vertical frames 40b ₁ and 40b ₂ extending in the vertical direction of the support frame 40 on the rear side (tablet outlet side). The shaft support plate 50a is formed with two shaft insertion holes spaced apart in the horizontal direction, and the shaft support plate 50b is also formed with two shaft insertion holes spaced apart in the horizontal direction. The position in the height direction of the shaft insertion hole on the shaft support plate 50b side is slightly below the position in the height direction of the shaft insertion hole on the shaft support plate 50a side in accordance with the inclination of the inclined drum 34.

  The front end (tablet inlet side) end of the rotating shaft 52a slightly protrudes outward from the shaft support plate 50a, and the protruding portion is rotatably supported by a bearing 53a as shown in FIG. The end of the rotating shaft 52a on the rear side (tablet outlet side) protrudes outward from the shaft support plate 50b slightly longer than the protruding length of the front end, and the inner side of the protruding portion is hidden in FIG. 2), and a geared pulley 54a is fixed to the outer end portion thereof as shown in FIG. Similarly, the front end (tablet slot side) end of the rotating shaft 52b slightly protrudes outward from the shaft support plate 50a, and the protruding portion is rotatably supported by a bearing 53b as shown in FIG. ing. The end of the rotating shaft 52b on the rear side (tablet outlet side) protrudes outward from the shaft support plate 50b slightly longer than the protruding length of the front end, and the inside of the protruding portion is hidden in the bearing (FIG. 2 is hidden). 2), and a pulley 54b with a gear is secured to the outer end portion thereof as shown in FIG.

  Further, rollers 55a (hidden in FIG. 1) and 55c are respectively fixed to the front and rear ends of the rotating shaft 52a inside the support frame 40, and are respectively attached to the front and rear ends of the rotating shaft 52b inside the support frame 40. Also, the rollers 55b and 55d are fixed.

  As shown in FIG. 4, the rollers 55 a to 55 d have roller main bodies 55 a ′ to 55 d ′ whose circumferential surface portions 55 a ″ to 55 d ″ are in contact with the contact portions 37 a and 37 b of the inclined drum 34, and the axial direction of the inclined drum 34. It can comprise from the regulation members 56a-56d which regulate the movement to. The peripheral surface portions 55a "to 55d" of the rollers 55a to 55d are different in friction coefficient from the rotating shafts 52a and 52b and the flanges 36a and 36b of the inclined drum 34 in order to prevent slippage between the rollers 55a to 55d more effectively. It is preferable to use a large material. For example, when stainless steel is used for the rotating shafts 52a and 52b and the inclined drum 34, urethane rubber can be used for the peripheral surface portions 55a "to 55d" of the rollers 55a to 55d. Needless to say, the combination of materials is not limited to those illustrated here, and any material can be used as long as it can prevent slipping more effectively.

  Next, the drive mechanism will be described. As shown in FIG. 2, the drive mechanism of the tablet deburring device 31 of the present invention is composed of a drive motor 60 in which a gear 62 is fixed to a drive shaft 61, a pair of geared pulleys 54a and 54b, and a bridge between them. A timing belt 63 is provided, and a tensioner 64 that applies tension to the timing belt 63 is provided outside the hood 39. A serrated portion 63 ′ is formed inside the timing belt 63. For example, the drive motor 60 is attached to a proper position of the support frame 40, and the tensioner 64 is attached to a proper position of the shaft support plate 50b. With such a drive mechanism configuration, there is no contact between the metals, and the problem of metal foreign matter is avoided, and the rotational driving force of the drive motor 60 causes the timing belt 63 and the pair of geared pulleys 54a and 54b to move. Thus, the rotation is reliably transmitted to the rotating shafts 52a and 52b.

  The tablet deburring device 31 of the present invention includes a drum pressing mechanism 70 that presses one end of the inclined drum 34 from above during operation of the device. For example, as shown in FIG. 5, the drum presser mechanism 70 has a drum presser bar 71 in which a driven roller 72 for drum presser is rotatably attached to one end and a through hole 73 is formed in the vicinity of the other end. Can be used. As the material of the driven roller 72, a material having a large friction coefficient different from the flanges 36a and 36b of the inclined drum 34 can be used. For example, urethane rubber is exemplified, but the material is not limited thereto. The through hole 73 is inserted with a pin 74 fixed so as to protrude laterally at an appropriate position on the upper side of the support frame 40, and its rotational position can be adjusted by an appropriate angle with the pin 74 as an axis. . The adjustment can be performed by, for example, a screw 76 that is attached through a screw hole 75 that is also provided at an appropriate position on the upper side of the support frame 40. Of course, in the present invention, the drum pressing mechanism is not limited to the one described here, and one that uses rubber elasticity, a bias by a spring, screw pressurization, or the like can be used alone or in combination.

  Next, the operation of the tablet deburring device 31 of the present invention will be described with reference to FIGS.

  First, when the drive motor 60 is driven, the rotational driving force is transmitted to the gear 62 fixed to the drive shaft 61, the gear 62 meshes with the sawtooth portion 63 ′ inside the timing belt 63, and the timing belt 63 is, for example, Rotate clockwise. Since the timing belt 63 meshes with the gears of the pair of geared pulleys 54a and 54b, the rotational force of the timing belt 63 is transmitted to the rotating shafts 52a and 52b via the geared pulleys 54a and 54b, and the pair of rotating shafts 52a. , 52b are rotated in the same direction (clockwise). Since these drive mechanisms are arranged outside the hood 39 and there is no contact between metals, no metal foreign matter is generated. When the pair of rotating shafts 52a and 52b rotate, the rollers 55a to 55d fixed to these also rotate clockwise. Here, the peripheral surface portions 55a "and 55b" of the rollers 55a and 55b are in contact with the contact portion 37a of the flange 36a of the inclined drum 34, and the peripheral surface portions 55c "and 55d" of the rollers 55c and 55d are the flange 36b of the inclined drum 34. Therefore, the rotational driving force of the rollers 55a to 55d is transmitted to the inclined drum 34 via the flanges 36a and 36b, and the inclined drum 34 rotates stably at a constant speed clockwise. Here, since the peripheral surface portions 55a "-55d" of the rollers 55a-55d are formed of a material having a large friction coefficient such as urethane rubber, the slip between the rollers 55a-55d and the flanges 36a, 36b of the inclined drum 34 is more improved. Effectively prevented.

  Further, here, by adjusting the screw 76 of the drum pressing mechanism 70 of FIG. 5, the drum pressing bar 71 is rotated by an appropriate angle around the pin 74, and the driven roller 72 is, for example, a flange of the inclined drum 34. 36a is pressed from above with an appropriate pressure. Thereby, in synergy with the effect by the selection of the roller outer peripheral material, slip between the rollers 55a to 55d and the flanges 36a and 36b of the inclined drum 34 is further effectively prevented.

  On the other hand, when a tablet to be deburred is inserted from the insertion chute 44 on the tablet insertion port 32 side, the input amount of the tablet is adjusted by the flow rate adjusting plate 45, and an appropriate amount is continuously input. While the tablet flows down in the inclined drum 34, the tablet stays at the baffle plates 41a and 41b for an appropriate period of time, the amount of flow of the tablet is adjusted, and effective deburring is performed. At this time, air containing electrostatic removal ions is ejected from the nozzles 42a, 42b, and 43, and crushed burrs, fine powder, and the like attached to the tablet are blown upstream. Here, since static elimination ions are contained in the air, it is possible to remove static electricity and blow off much of the adhered matter. The deburred tablet is taken out from the tablet discharge port 33 to the discharge chute 46.

  During the deburring operation, fine dust-like crushed debris and the like are collected from the dust collection ports 47 a and 47 b provided on the side of the hood 39, and are efficiently sucked and collected from the collection port 48.

  In addition to being able to perform more efficient deburring work as described above, it is possible to further improve the removal efficiency of fine powders and the like adhering to the tablet, and the problem of occurrence of metal foreign matter is avoided, and workability is improved. , Maintenance can be further improved.

  Next, an example of deburring the tablet using the tablet deburring device of the embodiment described above will be described.

  As the inclined drum, a stainless steel drum with a side of 10 cm and a length of 70 cm was used. The tablet is made of an epoxy molding material for semiconductor encapsulation in a granular form, using a plurality of cylindrical shapes having a diameter of 8 to 20 mm and a height of 13 to 22 mm, a drum rotation speed of 12 rpm, and a dwell time in the drum of the tablet When the deburring is performed for about 1 to 3 minutes, no metallic foreign matter is naturally generated, no slip occurs between the flange of the inclined drum and the roller attached to the rotating shaft, and it adheres to the tablet per box. The amount of fine powder thus produced could be reduced to about 1/4 compared with the case of the direct drive system between metal gears.

  Further, in comparison with a method in which air is simply ejected from a nozzle to blow off fine powder and the like, a method in which air containing electrostatic removal ions is blown to blow off fine powder and the like has improved the removal rate by about 15%.

  Of course, the present invention is not limited to the above-described embodiments, and various aspects are possible for details.

It is the perspective view which notched and showed the principal part of one Embodiment of the deburring apparatus of the tablet of this invention. It is the front view which looked at the drive mechanism in one embodiment same as the above from the tablet discharge outlet side. It is the front view which looked at the attachment site | part of the rotating shaft in one Embodiment same as the above from the tablet insertion port side. In 1st Embodiment same as the above, it is a perspective view which shows the state which the roller attached to the rotating shaft and the flange of an inclination drum are contacting. It is a perspective view explaining the drum pressing mechanism in one embodiment same as the above. It is the perspective view which cut and showed the principal part of the deburring apparatus of the tablet which the present applicant previously proposed. It is explanatory drawing of the drive mechanism of the inclination drum currently used recently.

Explanation of symbols

DESCRIPTION OF SYMBOLS 31 Deburring apparatus 32 Tablet insertion port 33 Tablet discharge port 34 Inclined drum 35 Open hole 36a, 36b Flange 37a, 37b Contact part 39 Hood 40 Support frame body 41a, 41b Baffle plate 42a, 42b, 43 Nozzle 50a, 50b Shaft support Plates 52a and 52b Rotating shafts 54a and 54b Geared pulleys 55a to 55d Rollers 55a "to 55d" Circumferential surface portion 60 Drive motor 61 Drive shaft 62 Gear 63 Timing belt 64 Tensioner 70 Drum pressing mechanism 71 Drum pressing rod 72 Followed roller 76 screw

Claims (4)

A tablet insertion port for inserting a tablet at one end and a tablet discharge port for discharging the tablet at the other end, and a plurality of opening holes for removing burrs are formed on the side surface between both ends And a rotatable cylindrical inclined drum provided with flanges around both ends,
A support frame attached with a hood for storing the entire inclined drum;
Both ends are pivotally supported by the support frame, a part of one end protrudes to the outside of the hood, and rollers that abut the peripheral surface of the flange of the inclined drum at both ends in the support frame. A pair of rotating shafts that are respectively fixed and inclined and arranged in parallel with the inclination of the inclined drum below the inclined drum;
A pair of drive motors with gears on the drive shaft, pulleys with gears fixed to the protruding ends of the pair of rotary shafts, and gears of the drive motor and pulleys with gears. A deburring device for a tablet comprising a timing belt that transmits to a rotating shaft of the hood and a drive mechanism provided outside the hood.   2. The tablet deburring device according to claim 1, wherein the outer peripheral portions of the rollers fixed to the pair of rotating shafts are formed using a material having a larger friction coefficient than the material of the flange of the inclined drum.   3. The tablet deburring device according to claim 1, further comprising a drum pressing mechanism for pressing at least one end of the inclined drum from above.   4. An air blow spraying means for spraying air containing electrostatic removal ions to blow away crushed debris and fine particles adhering to the tablet upstream is attached. Deburring device for tablets as described in 1.

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