JP5555538B2 - Powder compression molding product take-out device and rotary powder compression molding device equipped with this device - Google Patents

Description

  The present invention discharges a molded product related to a non-defective product to the outside of the rotating plate by a scraper, and discharges a molded product related to a defective product to the outside of the rotating plate by air pressure upstream of the discharge position, and For example, the present invention relates to a rotary powder compression molding apparatus such as a rotary tableting machine for producing tablets.

  2. Description of the Related Art Conventionally, a product take-out apparatus in which a scraper for taking out a non-defective product is provided at a product take-out position on a rotating disk and a pneumatic defective product discharge device is provided on the upstream side is known (see, for example, Patent Documents 1 and 2). ).

  These product take-out devices determine whether a molded product is a non-defective product or a defective product from a detection signal from a load cell or the like that detects a molding load when molding a molded product (product), and the molded product is a good product. If a defective product is taken out of the rotating disk by a scraper without operating the defective product discharge device, and the molded product is defective, operate the defective product discharge device before it reaches the scraper, The air blown out from the nozzle is configured to blow off defective products from the tip of the lower eyelid.

Japanese Utility Model Publication No. 3-24313 Japanese Utility Model Publication No. 6-77997

  The pneumatic defective product discharger is more reliable in operation compared to a configuration in which a defective product is discharged with a movable scraper that is moved in the direction of being inserted into and removed from the rotating disk. Also suitable for rotating.

  However, at present, it cannot be guaranteed that a defective product pushed up onto the die by the lower punch will be blown off from the lower punch with the force of the air injected from the air nozzle.

  In other words, it is possible that the pressure of the air blown to the defective product may be lost or reduced due to problems such as the air device that sends high-pressure air to the air nozzle and the air path, and the air is normally injected. However, when the adhesion strength of the molded product to the lower arm is excessively increased, the pressure of the air sprayed on the defective product may be relatively insufficient.

  The adhesion strength is increased when the tip of the lower eyelid is rough, when the unevenness for imprinting the molded product is provided on the tip surface of the lower eyelid, when the adhesion of the powder to be molded is high, etc. . In particular, when molding is performed using raw materials with high adhesion, abnormal molding pressure usually acts when the molded product is defective. May be improved. Therefore, in such a case, even if the pressure of the air sprayed from the air nozzle is increased, it is difficult to completely remove the defective product from the upper surface and blow it out of the rotating disk.

  As described above, taking out (discharging) defective products by the blast air is not completely reliable. For this reason, in the product take-out apparatus of Patent Documents 1 and 2, when the above defective product discharge failure occurs, it is unavoidable that the defective product is taken out of the rotating disk by the scraper like the good product and mixed with the good product. Absent.

  In addition to the above, the product take-out devices of Patent Documents 1 and 2 cannot know whether or not a defective product is mixed with a non-defective product, and therefore cannot take any measures against a defective product mixed with a non-defective product. There is a problem. In particular, in a rotary tableting device that compresses tablets, it is likely that the above-mentioned defective products are mixed with non-defective products as described above. However, it is impossible for the techniques of Patent Documents 1 and 2 to satisfy this requirement.

  Accordingly, an object of the present invention is to detect whether or not a defective product is mixed into a non-defective product taken out from the rotating disk, and to perform a countermeasure against defective products according to the mixture of defective products, It is providing the rotary powder compression molding apparatus provided with this apparatus.

  In the present invention, a molded product extruded from a mortar attached to a rotating disk with a lower punch is led out of the rotating disk by a scraper, and is not located inside the rotational trajectory of the mortar hole on the upstream side of the scraper. Non-defective product discharge nozzles are arranged, and the powder compression that blows out defective products in the molded products that are judged good or bad based on the molding information obtained at the time of compression molding of the molded products, is discharged from the nozzle to the defective product discharge section Assume a molded product removal device.

And in order to solve the said subject, this invention is a scraper whether the inferior goods are mounted in the lower trajectory which moves between the rotation locus | trajectory of a mortar hole, the intersection of the air injected from the nozzle, and a scraper. It is characterized in that it is detected by a detector before a defective product on the lower arm hits , and a predetermined countermeasure against defective products is executed by the control device based on this detection.

In the present invention, when a defective product in a molded product extruded from a die with a lower punch remains on the lower punch without being discharged regardless of the ejection of air from the nozzle for discharging the defective product. Detects the presence or absence of residue before the scraper is in contact with the scraper and the defective product on the lower arm that moves between the rotation trajectory of the mortar and the intersection of the air jetted from the nozzle and the scraper. Since it is possible to detect whether or not a defective product detected without being discharged to the defective product discharge section is mixed with a non-defective product taken out from the rotating disk, the control device can Measures against defective products against the contamination can be executed.

  According to the powder compression molding product take-out device of the present invention and the rotary powder compression molding device provided with this device, it is possible to detect whether or not a defective product is mixed in a non-defective product taken out from the rotating disk and There is an effect that good product measures can be executed.

It is the schematic which shows the structure of the powder compression molding product taking-out apparatus which concerns on one Embodiment of this invention. It is sectional drawing which shows the detector for discharge defect detection with which the taking-out apparatus of FIG. 1 is provided with a part of rotary disk. It is sectional drawing which shows the structure around a switching valve along the F3-F3 line | wire in FIG. It is sectional drawing which shows the other example of the detector for discharge defect detection which can be equipped in the powder compression molding product taking-out apparatus of FIG. 1 with a part of turntable.

  Hereinafter, an embodiment of the present invention will be described in detail with reference to FIGS.

  Reference numeral 1 in FIG. 1 indicates a rotary powder compression molding apparatus that manufactures a powder compression molded product, for example, a rotary tableting apparatus that manufactures tablets. This tableting device 1 is a specific example of a rotary powder compression molding machine, a specific example of a rotary tableting machine 2, and a specific example of a powder compression molding product take-out device for taking out a powder compression molding product such as a tablet T from the tableting machine 2. As a tablet take-out device 3.

  As shown in FIG. 1, the tableting machine 2 includes a rotating disk 7 that is rotated by a rotating disk drive device 5. The turntable 7 includes a mortar mounting portion 8 provided between the upper heel guide portion and the lower heel guide portion (not shown). The outer periphery of the mortar mounting portion 8 is circular. A plurality of mortars 9 are mounted on the mortar mounting portion 8 at regular intervals along the rotation direction of the rotary disk 7. In FIG. 1, an arrow A indicates the rotation direction of the rotating disk, and a symbol B indicates a center line of the rotation locus of the mortar 9 a that the mortar 9 has. The upper surface of the mortar 9 and the upper surface of the mortar mounting portion 8 are flush with each other, that is, have the same height.

  The tableting machine 2 includes a powder feeder (not shown) arranged close to the mortar mounting portion 8 and an upper punch 12 guided by the upper punch guide portion corresponding to each mortar 9 (FIG. 2). Only one is shown in FIG. 2), an upper iron orbit (not shown) for raising and lowering the upper iron, and a lower iron 10 guided by the lower iron guide portion corresponding to each mortar 9 (one in FIG. 2). Only the lower arm 10), and various lower armor tracks (not illustrated) for moving the lower arm 10 up and down, an upper pressure roller (not illustrated), a lower pressure roller 11, and the like. The upper end portion of the lower punch 10 is inserted upward into a mortar hole 9a (particularly, see FIG. 2) penetrating in the vertical direction of the mortar 9, and the bottom of the mortar hole 9a is at a time other than the time of taking out the tablet T. There is no.

  This tableting machine 2 is in contact with the upper pressure roll and the lower pressure roll 11 at the compression molding position with the powder taken into the mortar 9a from the powder feeder and weighed as the turntable 7 rotates. Are compressed in the mortar 9 by the upper punch 10 and the lower punch 10 that are moved toward each other, and at a molded product take-out position set on the downstream side in the rotational direction of the turntable 7 with respect to the compression molding position. The tablet T in the mortar 9 is pushed out of the mortar 9 by the lower punch 10 and taken out of the rotating disk 7 by the powder compression molding product take-out device 3.

  A sensor 13 for detecting molding information when the tablet T is compression-molded, for example, a molding load, is attached to one of the upper pressure roller 11 and the lower pressure roller 11, for example, the lower pressure roller 11. For example, a load cell is used as the sensor 13.

  Here, the pressure roll includes a roller and a support member thereof, and a load 13 or the like sensor 13 converts a load applied to the pressure roll into an electrical signal and outputs it. When compression molding is performed in two stages, that is, preliminary compression and main compression at a main compression position set on the downstream side in the rotation direction of the rotary disk 7 with respect to the preliminary compression position where the preliminary compression is performed. In the rotary powder compression molding machine configured to be performed, the sensor 13 may be attached to the upper or lower pressure roller for main compression.

  The output of the sensor 13 (detection signal corresponding to the detected molding load) is supplied to a control device 15 installed separately from the tableting machine 2. Furthermore, in the case of a rotary tableting machine (rotary powder compression molding machine) that performs compression molding with the tablet (molded product) thickness set to a predetermined target value, the upper punch and lower punch 10 are replaced with a load cell. A displacement sensor that detects the tip interval and outputs an electrical signal corresponding to the detected interval can be used as a sensor that acquires molding information.

  The tablet take-out device 3 includes a discharge conductor 21, a defective product discharge nozzle 31, a defective product discharge drive device 33, a detector 35, and the control device 15.

  The discharge conductor 21, the nozzle 31, and the detector 35 are positions between the position where the tablet T is pushed out from the upper surface of the die 9 with the lower punch 10 and the powder supply position where the powder supplier is arranged, that is, The molded product is taken out from the position.

  The discharge conductor 21 is provided around the tableting machine 2, and includes a discharge head 21a, a first discharge chute 21b for discharging defective products, a second discharge chute 21c for discharging non-defective products, and a switching valve 21d. I have.

  The discharge head 21 a has a first part adjacent to the outer periphery of the mortar mounting part 8 and a second part provided on the mortar mounting part 8 so as to be provided continuously with the first part.

  A first discharge port 22 and a second discharge port 23 are provided in the first part. The upper ends of the first discharge port 22 and the second discharge port 23 are opened.

  At the lower end of the first discharge port 22 for discharging a tablet T related to a defective product (hereinafter referred to as a defective product and referred to as a defective product Ta when it is necessary to distinguish from a tablet related to a non-defective product described below), The inlet of the first discharge chute 21b is provided continuously. The first discharge chute 21b is inclined and its outlet 21be is at a position lower than the inlet.

  A second discharge chute 21c is provided at the lower end of the second discharge port 23 for discharging a tablet T related to a non-defective product (hereinafter referred to as a non-defective product and referred to as a non-defective product Tb when it is necessary to distinguish it from a defective product Ta). The entrance is continuously provided. The second discharge chute 21c is inclined and has a first take-out port 21ce and a second take-out port 21cg as shown in FIG. The first outlet 21ce and the second outlet 21cg are at a position lower than the inlet.

  The second part has a first inlet 24 and a second inlet 25. In order to receive the defective product Ta in the discharge conductor 21, the first inlet 24 is provided corresponding to the first discharge port 22. The passage from the first inlet 24 to the first discharge port 22 forms, for example, a first passage Sa as a defective product discharge portion that receives defective products. Accordingly, the first inlet 24 is provided at one end of the first passage Sa, and the first outlet 22 is provided at the other end of the first passage Sa. The first passage Sa is formed outside the region surrounded by the center line B of the rotation locus of the mortar 9a, and the first inlet 24 is opened at a position close to the center line B.

  The second inlet 25 is located downstream of the first inlet 24 in the rotation direction of the turntable 7 and is provided corresponding to the second outlet 23. A passage from the second inlet 25 to the second outlet 23 forms a second passage Sb. Accordingly, the second inlet 25 is provided at one end of the second passage Sb, and the second outlet 23 is provided at the other end of the second passage Sb. The second inlet 25 is opened so as to intersect with the rotation locus of the mortar hole 9a.

  The discharge head 21a has a partition wall 26 that partitions the first passage Sa and the second passage Sb, and has a top plate 27 that prevents the tablets T from jumping upward from these passages. The partition wall 26 is disposed outside the region surrounded by the center line B of the rotation locus of the mortar hole 9a. The tip of the partition wall 26 is close to the center line B so as not to interfere with the tablet T extruded onto the die 9.

  The side surface on the upstream side of the partition wall 26 is provided so that the width of the first passage Sa is narrowed toward the first inlet 24 side, and the defective product Ta is directed from the first inlet 24 toward the first outlet 22. Used as a guide wall to guide. A side wall on the downstream side of the discharge head 21 a that guides the tablet T from the first inlet 24 toward the first discharge port 22 is used as a scraper 28 that forms a second passage Sb with the partition wall 26. The scraper 28 is provided so as to intersect with the rotational trajectory of the mortar 9 and the mortar hole 9a.

  The switching valve 21d is attached to the second discharge chute 21c in order to select the first outlet 21ce or the second outlet 21cg. That is, the switching valve 21d is attached to a rotating shaft 29a of a valve driving member 29 made of, for example, a rotary solenoid as shown in FIG. This switching valve 21d is selectively arranged at either the first position indicated by the solid line in FIG. 3 or the second position indicated by the two-dot chain line in accordance with the control of the valve drive member 29 by the control device 15.

  The switching valve 21d disposed at the first position closes the second outlet 21cg without partitioning the inside of the second discharge chute 21c. In this state, the tablet T passing through the second discharge chute 21c can be discharged through the first outlet 21ce. On the other hand, the switching valve 21d arranged at the second position partitions the inside of the second discharge chute 21c while opening the second take-out port 21cg and diagonally facing the second take-out port 21cg. In this state, the tablet T passing through the second discharge chute 21c can be discharged through the second extraction port 21cg. In addition, the code | symbol 30 in FIG. 3 has shown the auxiliary | assistant chute | lead which guide | induces the tablet which passed 2nd extraction opening 21cg.

  As shown in FIG. 1, the nozzle 31 is surrounded by the rotation locus on the upstream side in the rotation direction of the rotating disk 7 and inside the rotation locus of the mortar 9a with respect to the discharge conductor 21 at the molded product take-out position. Arranged in the area. In order to inject the compressed high-pressure air toward the inlet of the defective product discharge section, that is, the first inlet 24 by the operation of the defective product discharge driving device 33 connected to the nozzle 31, the first nozzle 31. It faces the entrance 24 of the.

  The defective product discharge drive device 33 has an air supply source for supplying high-pressure air, an air pipe extending from the supply source to the nozzle 31, and an electromagnetic on-off valve provided in the pipe. The defective product discharge driving device 33 is controlled by the control device 15 and configured to inject air from the nozzle 31 continuously only during the period when the electromagnetic on-off valve is opened by this control.

  The detector 35 is used to detect a defective discharge of the defective product Ta by the nozzle 31, that is, detect whether or not the defective product Ta is placed on the lower iron 10.

  This detector 35 is located between the intersection of the rotation trajectory of the mortar 9a and the air jetted from the nozzle 31 (represented by symbol C in FIG. 1) and the scraper 28, in other words, the intersection. It is disposed downstream of the rotating disk 7 in the rotation direction of C and upstream of the scraper 28 in the rotation direction of the rotating disk 7. Specifically, a detector 35 is attached to a side surface of the partition wall 26 facing the second passage Sb.

  The detector 35 is, for example, a transmission type, and includes a light projector 35a and a light receiver 35b that receives and photoelectrically converts light emitted from the light projector 35a as shown in FIG. One of the light projector 35a and the light receiver 35b is disposed inside the region surrounded by the rotation locus of the mortar hole 9a, and the other is disposed outside the region, and is directed from the light projector 35a toward the light receiver 35b. Light is shielded by the tablet T when the tablet T is placed on the lower eyelid 10, and is received by the light receiver 35b when the tablet T is not placed on the lower eyelid 10. In addition, the intersection (this in other words, the position where the defective discharge of the defective product Ta is detected, which will be referred to as the detection position hereinafter) is representatively represented by the symbol D in FIG. Show.

  Reference numeral 36 in FIG. 2 indicates a detector holder that supports the projector 35a and the light receiver 35b. The detector holder 36 is provided with an air purge passage 37. The air purge passage 37 has a first purge hole 37a and a second purge hole 37b located on the optical path from the light projector 35a to the light receiver 35b. doing. The air jetted from the first purge hole 37a and the second purge hole 37b blows off dust on the optical path from the light projector 35a to the light receiver 35b, thereby improving the detection reliability of the detector 35. Yes. Further, reference numeral 38 in FIG. 2 denotes a connector communicated with the air purge passage 37. The connector 38 is connected to an air pipe that reaches an air supply source (not shown). The air supply source can share the air supply source of the defective product discharge driving device 33, and air of a predetermined pressure is supplied to the first purge hole 37a and the second purge via a pressure reducing valve or the like attached to an air pipe connected to the connector 38. It is ejected from the purge hole 37b.

  The detector 35 can be a reflective type shown in FIG. 4 instead of the transmissive type shown in FIG. 4 that are the same as those of the transmission type detector 35 in FIG. 2 are denoted by the same reference numerals as those in FIG. 2, and description thereof is omitted. The reflection type detector 35 includes a light projector 35 a and a light receiver (not shown in FIG. 4) arranged side by side. Light reflected from the defective product Ta on the lower eyelid 10 is projected from the light projector. Is received by the light receiver, and it can be detected that the defective product Ta is placed on the lower plate 10. If there is no defective product Ta on the lower plate 10, the lower plate 10 detects from the light receiving area of the light receiver. Since the reflected light is not received by the light receiver, it can be detected that there is no defective product Ta on the lower eyelid 10.

  The detector 35 is controlled by the control device 15 so as to continue the detection operation during the operation of the tableting device 1. Further, the detection information of the detector 35 is supplied to the control device 15. Further, as shown in FIG. 1, an alarm 41 such as an alarm is connected to the control device 15.

  As the rotating disk 7 is rotationally driven by the control device 15 via the rotating disk driving device 5, the tablet T is manufactured as described above. During the manufacture of the tablet T, the detector 35 continues the detection operation by the control device 15. Further, the control device 15 does not operate the valve drive member 29 at times other than when a defective product Ta is discharged due to the jet air from the nozzle 31 described later. It is held at the first position indicated by the solid line.

  The molding load (molding information) detected by the sensor 13 every time the tablet T is compression molded in the die 9 is supplied to the control device 15. Therefore, the control device 15 determines whether the tablet T manufactured based on the supplied molding load is a non-defective product Tb or a defective product Ta by the quality determination unit. In this case, the tablet T within the specified molding load range is determined as a non-defective product Tb, and the tablet T outside the specified molding load range is determined as a defective product Ta.

  When the lower punch 10 is moved to the tablet take-out position after compression molding, immediately after that, as shown in FIG. 2, the lower punch 10 is raised to a height position at which the tablet T is extruded onto the mortar 9a, It passes under the scraper 28 while maintaining this height position. In this state, the upper punch 12 is held in a state where it has been lifted to a height position that does not interfere with the discharge head 21a and the like through the mortar hole 9a.

  When the manufactured tablet T is a non-defective product Tb, the defective product discharge driving device 33 is not operated. Therefore, the non-defective product Tb is not blown with high-pressure air, and the gap between the first inlet 24 of the discharge head 21a and the nozzle 31 is not blown. pass.

  Immediately after this, the non-defective product Tb extruded by the lower punch 10 on the mortar 9 crosses the optical path of the detector 35, so that the non-defective product Tb is detected by the detector 35. That is, since the light receiver 35b does not receive the light emitted from the projector 35a, it outputs a low signal (in the case of FIG. 4, the light receiver (not shown) receives the light emitted from the projector 35a and reflected by the non-defective product Tb). Output a high signal.)

  However, regardless of the detection of the non-defective product Tb, the control device 15 uses the timer, shift register, or the like provided in the control device 15 based on the detection of the molding load by the sensor 13 to rotate the turntable 7. The current position of the non-defective product Tb is known. That is, as described above, since the tablet T that has reached the detection position of the detector 35 is known to be a non-defective product Tb, the defective product discharge determination unit included in the control device 15 can be controlled by the detector 35 to the control device 15. The detection signal (the low signal or the high signal) supplied to is not accepted or is invalidated. As a result, the switching valve 21d still maintains the first position.

  After such detection, the lower rod 10 and the non-defective product Tb mounted thereon pass through the second inlet 25 of the discharge head 21 a and then hit the scraper 28, and at the same time, the lower rod 10 passes under the scraper 28. Along with this, the non-defective product Tb is removed from the lower rod 10 and guided in the second passage Sb to the scraper 28 and falls to the second discharge port 23, so that the non-defective product Tb is guided to the second discharge chute 21c. Then, it passes through the first take-out port 21ce and is discharged into an appropriate non-illustrated non-illustrated container disposed below the first take-out port 21ce.

  On the other hand, when the quality determination unit determines that the tablet T is a defective product Ta, the control device 15 operates the defective product discharge driving device 33 for a predetermined time according to the determination result. Accordingly, when the defective product Ta faces the first inlet 24 of the discharge head 21 a, high-pressure air is jetted from the nozzle 31 toward the first inlet 24 at the same timing. Thus, the high-pressure air is blown onto the defective product Ta extruded by the lower punch 10 on the die 9, so that the defective product Ta is blown off and guided in the first passage Sa to the partition wall 26 and the like. Falls to the discharge port 22. As a result, the defective product Ta is guided to the first discharge chute 21b and is discharged to an appropriate defective product receiving container (not shown) disposed below the outlet 21be through the outlet 21be.

  Immediately after the defective product Ta is discharged by such air, the lower iron 10 on which the defective product Ta has been placed passes through the detector 35. In this case, the lower eyelid 10 is positioned below the optical path of the detector 35 and does not cross the optical path of the detector 35. Therefore, the light receiver 35b of the detector 35 receives the light emitted by the light projector 35a and is high. A signal is output (in the case of FIG. 4, a light receiver (not shown) outputs a low signal because it does not receive the light emitted from the light projector 35a and reflected from the upper end surface of the lower eyelid 10)). With this detection signal, the defective product discharge determination unit of the control device 15 properly discharges the defective product Ta by air on the upstream side in the rotation direction of the rotating disk 7 with respect to the detection position D by the detector 35. Judge that.

  In addition, when the defective product Ta is blown off by air for some reason, that is, when defective product discharge is defective, the defective product Ta is placed on the lower punch 10 protruding slightly upward from the die hole 9a. The state as it is is maintained, and the defective product Ta and the lower eyelid 10 pass the detection position D. Accordingly, as in the case of the non-defective product Tb, the detector 35 detects that the defective product Ta is placed on the lower iron 10.

  In this case, as described above, since the control device 15 knows the current position of the defective product Ta accompanying the rotation of the turntable 7 based on the detection of the molding load by the sensor 13, the control device 15 does not have the failure. The detection signal supplied from the detector 35 to the non-defective product determination unit is accepted, or the accepted signal is validated. Accordingly, the defective product discharge determining unit determines that the defective product Ta is blown off by the high-pressure air.

  By detecting the presence or absence of the defective product Ta at the detection position D as described above, it can be reliably determined whether or not the defective product Ta is properly discharged. Further, the defective product Ta that has passed the detection position D is taken out by the scraper 28 to the second discharge chute 21c disposed outside the rotating disk 7 in the same manner as the discharge of the non-defective product Tb.

  In accordance with the above determination by the defective product discharge determining unit, immediately after that, the control device 15 executes the first defective measure countermeasure. As a countermeasure against the first defective product, the control device 15 operates the valve driving member 29 to place the switching valve 21d in the second position for a certain period of time. For this reason, the defective product Ta together with the non-defective product Tb is guided to the second discharge port 23 of the second discharge chute 21c by the switching valve 21d and discharged into a defective product receiving container (not shown) disposed below the auxiliary chute 30. Is done. Therefore, it is possible to prevent the defective product Ta from being mixed in the good product receiving container that receives the good product Tb that has passed through the first outlet 21ce.

  At the same time, since the control device 15 operates the alarm device 41 as a countermeasure against the first defective product, the discharge of the defective product is notified. Note that, after the predetermined time has elapsed, the control device 15 returns the switching valve 21d to the first position, so that the removal of the non-defective product Tb is resumed.

  Furthermore, when a predetermined number of times that the defective product Ta is placed on the lower iron 10 is detected by the detector 35 continuously or intermittently within a specified time, in other words, the first defective product described above. When the countermeasure is taken a predetermined number of times within the specified time, the control device 15 executes the second defective article countermeasure. In the countermeasure against the second defective product, the control device 15 stops the operation of the rotating disk drive device 5 to stop the rotation of the rotating disk 7, and the alarm device 41 is different from the case of the countermeasure against the first defective product. It is operated with a notification mode, for example, a different sound or a different notification interval. Such a countermeasure against the second defective product can prevent the defective product Ta from being continuously manufactured, and can reduce the total amount of the non-defective product Tb discharged wastefully together with the defective product Ta.

  As described above, in the tableting device 1 configured as described above, the defective product Ta in the tablet T extruded from the die 9 with the lower punch 10 is discharged regardless of the ejection of air from the nozzle 31 for discharging the defective product. Even if it remains on the lower punch 10, the presence / absence of such remaining is disposed between the rotation locus of the mortar 9 a and the intersection C of the air jetted from the nozzle 31 and the scraper 28. It can be detected by the detector 35. Therefore, it is possible to know whether or not the detected defective product Ta is mixed in the non-defective product Tb taken out of the mortar mounting portion 8 of the turntable 7, and based on this detection, measures against the defective product against the mixing are obtained. The non-defective product Tb can be taken out so as not to be mixed with the defective product Ta.

  Further, as described above, the defective product Ta can be taken out via the switching valve 21d under the control of the control device 15, so that it is not necessary to increase the air pressure unnecessarily so that the defective product Ta can be more reliably removed from the lower rod 10. . Accordingly, the possibility that the defective product Ta blown off by air pressure in the first passage Sa bounces back is reduced. Therefore, it is possible to prevent the defective product Ta from entering the second passage Sb and mixing with the non-defective product Tb due to rebound.

  The present invention is not limited to the one embodiment. For example, every time a defective discharge of defective product Ta due to air is detected, the control device 15 controls the turntable driving device 5 to stop the rotation of the turntable 7 as a countermeasure against the defective product, and the turntable 7 stops. In the meantime, the switching valve 21d may be moved from the first position and disposed at the second position.

  Furthermore, the relationship between the first take-out port 21ce and the second take-out port 21cg and the switching valve 21d may be opposite to that in the above-described embodiment. That is, when the switching valve 21d is arranged at the second position, the non-defective product Tb is taken out through the second outlet 21cg, and when the switching valve 21d is arranged at the first position, The defective product Ta can be taken out together with the non-defective product Tb through the first take-out port 21ce.

DESCRIPTION OF SYMBOLS 1 ... Rotary tableting apparatus (rotary powder compression molding apparatus), 2 ... Tableting machine (powder compression molding machine), 3 ... Tablet extraction apparatus (powder compression molding product extraction apparatus), 5 ... Rotary disk drive apparatus, DESCRIPTION OF SYMBOLS 7 ... Rotary disk, 8 ... Die attaching part, 9 ... Die, 9a ... Dice hole, 10 ... Lower arm, 13 ... Sensor, 15 ... Control device, 21 ... Discharge conductor, 21c ... 2nd discharge chute, 21d ... Switching Valve, 21ce ... first outlet, 21cg ... second outlet, 24 ... first inlet, 25 ... second inlet, 26 ... partition wall, Sa ... first passage (defective product discharge section), Sb ... 2nd passage, 28 ... scraper, 31 ... nozzle, 33 ... defective product discharge drive device, 35 ... detector, 35a ... projector, 35b ... light receiver, T ... tablet (molded product), Ta ... defective product, Tb ... non-defective product , B ... Center line of acetabular rotation trajectory, C ... Intersection

Claims (8)

A scraper that intersects the rotational trajectory of the mortar hole of the mortar attached to the mortar mounting portion of the rotating disk, and a defective product discharging unit that receives defective products discharged out of the rotating disk among the molded products, A discharge conductor for discharging the molded product extruded from the mortar with a lower punch to the outside of the rotating disk by the scraper;
A nozzle for discharging defective products, which is provided on the upstream side of the discharge conductor and on the inner side of the rotation locus and injects air toward the inlet of the defective product discharge section;
The scraper hits the scraper to determine whether or not the defective product is placed on the lower rod that moves between the air jetted from the nozzle, the intersection of the rotation trajectories, and the scraper. A detector to detect before ,
The quality of the molded product is judged based on molding information obtained at the time of compression molding of the molded product, and when the molded product judged to be defective faces the inlet of the defective product discharge section, air is discharged from the nozzle. A control device for performing countermeasures against defective products based on the fact that the detector detects that a molded product determined to be defective is placed on the lower arm as well as spraying;
An apparatus for taking out a powder compression molded product, comprising: 2. The powder compression molding product takeout device according to claim 1, wherein the detector is disposed between the intersecting portion and the scraper . The discharge conductor is disposed in a chute having a first take-out port and a second take-out port and a first position provided on the chute and usually discharging the molded product from the first take-out port. A switching valve that is held in a closed state, and the switching valve is disposed at a second position for discharging the molded product that is about to pass through the chute from the second take-out port as a countermeasure against the defective product. powder compression molding article takeout device according to claim 1 or 2, characterized in that that. The powder compression molding product take-out apparatus according to any one of claims 1 to 3, wherein the rotation of the rotating disk is stopped by the countermeasure against the defective product . Based on the fact that the predetermined number of detectors detect that the molded product determined to be defective is placed on the lower arm continuously or intermittently within a certain time, the control device The powder compression molding product take-out device according to any one of claims 1 to 3, wherein the rotation is stopped . The detector includes a light projector and a light receiver that photoelectrically converts light emitted from the light projector, and one of the light projector and the light receiver is disposed in a region surrounded by the rotation locus, and the other is the The powder compression molding product takeout device according to any one of claims 1 to 5, wherein the powder compression molding product takeout device is disposed outside the region. A second passage in which the discharge conductor has a second inlet provided on the downstream side in the rotation direction with respect to the inlet of the defective product discharge portion, and the second inlet is opened crossing the rotation locus. And a partition that partitions the second passage and the defective product discharge portion, the second passage is formed between the partition and the scraper, and the detector faces the second passage. The powder compression molding product taking-out apparatus according to any one of claims 1 to 6, characterized in that is attached. The powder in the die is compression-molded by a plurality of die attached to the die mounting portion of the rotating disk and upper and lower irons provided so as to be movable up and down with respect to these die, and the compressed molded product is the lower die. A rotary powder compression molding machine that is extruded from the mortar by a punch,
The powder compression molding product takeout device according to any one of claims 1 to 6, wherein a molded product extruded from the mortar is taken out of the rotating disk.
A rotary powder compression molding apparatus.

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