JP6153155B2 - Rotary powder compression molding machine - Google Patents

Description

  The present invention relates to a rotary powder compression molding machine for compressing raw material powder to form nuclear fuel pellets, pharmaceutical tablets, foods, electronic parts, mechanical parts and the like.

  A mortar hole is provided in the rotary plate, and the upper and lower ridges are slidably held on the upper and lower sides of each mortar hole, and both the rotary plate and the ridge are horizontally rotated. A rotary type powder compression molding machine that compresses and molds powder filled in a mortar when passing between lower rolls is known.

  During product compression molding, binding may occur where the powder adheres to the inner periphery of the mortar and sticking occurs where the powder adheres to the heel. All of these cause scratches, roughening and chipping in the product. In order to prevent this kind of obstacle, powder lubricant such as metal stearate or talc is sprayed and applied to the inner periphery or tip of the mortar, and then the powder is filled into the mortar and molded. (For example, refer to the following patent document).

  Conventionally, the lubricant applied to the inner peripheral surface of the mortar and the upper end surface of the lower punch has been sprayed from above the rotating disk. At this time, the injected lubricant may be scattered and attached to the upper surface of the rotating disk. Then, when filling the powder into the mortar, the lubricant is dropped into the mortar together with the powder and may be mixed into the product. If mixed, the amount of lubricant exceeding the specified value will be mixed into the product, resulting in problems in product quality.

  When manufacturing a product that requires a large amount of powder, the position of the upper end surface of the lower punch that fills the powder in the mortar must be lowered. In other words, the mortar hole becomes deeper. Even if the lubricant is injected toward the mortar from above, the lubricant does not sufficiently reach the bottom of the mortar, and binding and sticking may not be prevented.

JP 2012-076135 A

  An object of the present invention is to apply a necessary and sufficient amount of lubricant to substantially the entire area of the inner peripheral surface of the mortar and the upper end surface of the lower punch, and to prevent the lubricant from adhering to the upper surface of the rotating disk. To do.

In the present invention, a mortar hole that penetrates up and down and is filled with powder that is a raw material of a compression molded product, a rotating disk provided with an internal passage that opens to the inner peripheral surface of the mortar hole, and below the mortar hole, An upper end is inserted into the mortar hole and is slidable, and is disposed above the mortar hole so as to face the lower rotator, and rotates together with the rotary disk. The upper end of the lower punch inserted into the mortar and slidable, and the upper end surface of the mortar and the lower punch inserted into the mortar before filling with the powder, An injection member for injecting lubricant from the side of the mortar through the passage, a first suction member for inhaling lubricant injected into the mortar through the internal passage, the injection member, and the the the internal passage when no communication has been supplied to the injection member to suck the lubricant is not injected into the internal passages A suction member, a suction blocking portion that rotates together with the rotating disk and blocks between the ejection member and the second suction member when the ejection member communicates with the internal passage; and the ejection member and the internal passage. A rotary powder compression molding machine including an auxiliary member having a passage portion for communicating between the injection member and the second suction member when not communicating is configured. Here, the powder refers to an aggregate of fine solids, and includes so-called granules and powders having a shape smaller than the granules.

  If the first suction member is located above the mortar hole, it is possible to remove excess lubricant from the mortar hole and contribute to spreading the lubricant to the upper end of the mortar hole. obtain.

  In order to simplify the structure and mechanism, the internal passage extends from the inner peripheral surface of the mortar hole to the outer side along the radial direction, and opens to the outer peripheral surface of the rotating disk. The member faces the outer peripheral surface of the rotating disk, and the lubricant is injected from the injection member into the inner passage when the internal passage opening in the outer peripheral surface of the rotating disk passes in the vicinity of the injection member. Is preferable.

  According to the present invention, a necessary and sufficient amount of lubricant can be applied to substantially the entire area of the inner peripheral surface of the mortar and the upper end surface of the lower punch, and the lubricant can be prevented from adhering to the upper surface of the rotating disk. it can.

1 is a side sectional view showing a rotary powder compression molding machine according to an embodiment of the present invention. The principal part top view of the powder compression molding machine. The principal part perspective view which shows the lubricant injection apparatus for the mortar hole and lower arm provided with the powder compression molding machine. The principal part side sectional view of the lubricant injection device. The principal part plane sectional view of the lubricant injection device. The principal part bottom view of the same lubricant injection device. The principal part side sectional view of the lubricant injection device. The principal part bottom view of the same lubricant injection device.

  An embodiment of the present invention will be described with reference to the drawings. The rotary powder compression molding machine of this embodiment is used for the purpose of producing nuclear fuel pellets by compression molding powder containing nuclear material.

  The basic configuration of the rotary powder compression molding machine is the same as a known one. In general, as shown in FIG. 1, a vertical shaft 2 as a rotation shaft is established in a frame 1 of a powder compression molding machine, and a rotary disk 3 is connected to the upper portion of the vertical shaft 2 via a connection portion 21. It is attached.

  The turntable 3 rotates horizontally, that is, rotates around the vertical shaft 2. The turntable 3 includes a table (mortar disk) 31, an upper punch holder 32, and a lower punch holder 33. As shown in FIG. 2, the table 31 has a substantially disk shape, and a plurality of mortar holes 4 are provided at predetermined intervals along the rotation direction on the outer periphery thereof. The mortar hole 4 penetrates the table 31 in the vertical direction. The table 31 may be divided into a plurality of plates. Further, the mortar hole 4 is not directly formed in the table 31 itself, but a plurality of mortar members which are separate from the table 31 and can be attached to and detached from the table 31 are attached to the table 31, A configuration in which a mortar hole penetrating in the vertical direction is also provided.

  Above and below each mortar hole 4, an upper heel holding portion 32 and a lower heel holding portion 33 are provided so that the upper heel 5 and the lower heel 6 can be individually slid in the vertical direction with respect to the mortar hole 4. And hold it. The tip 53 of the upper arm 5 enters and exits the mortar hole 4. The tip 63 of the lower punch 6 is always inserted into the mortar hole 4. The upper rod 5 and the lower rod 6 rotate together with the rotating disk 3 around the vertical shaft 2, that is, revolve.

  A worm wheel 7 is attached to the lower end side of the vertical shaft 2. A worm gear 10 meshes with the worm wheel 7. The worm gear 10 is fixed to a gear shaft 9 that is driven by a motor 8. The driving force output from the motor 8 is transmitted to the gear shaft 9 by the belt 11, and rotationally drives the vertical shaft 2, and thus the rotating disk 3 and the eaves 5 and 6 via the worm gear 10 and the worm wheel 7.

  As shown in FIGS. 1 and 2, on the revolving track around the vertical shaft 2 of the eaves 5 and 6, the preload upper roll 12 and the preload lowering paired up and down with the eaves 5 and 6 interposed therebetween. There are a roll 13, a main roll 14 and a main roll 15. The pre-pressing roll 12 and the pre-pressing roll 13, and the main-pressing roll 14 and the main-pressing roll 15 are provided with upper and lower punches 5 in order to compress the powder filled in the mortar hole 4 from above and below with the tips 53 and 63. , 6 are urged in a direction to make them approach each other.

  The upper rod 5 and the lower rod 6 have head portions 51 and 61 pressed by the rolls 12, 13, 14, and 15, and shaft portions 52 and 62 having a smaller diameter than the head portions 51 and 61, respectively. The tip portions of the shaft portions 52 and 62 are thinner than other portions so as to be inserted into the mortar hole 4 and have a diameter substantially equal to the inner diameter of the mortar hole 4. The rolls 12, 13, 14, and 15 approach the heads 51 and 61 of the saddles 5 and 6 due to the revolution of the saddles 5 and 6, and come into contact with the heads 51 and 61. Furthermore, the rolls 12, 13, 14, and 15 are displaced horizontally while rolling on the heads 51 and 61, and at that time, the upper collar 5 is pushed downward or the lower collar 6 is pushed upward. During the period when the rolls 12, 13, 14, 15 are in contact with the flat surfaces on the ridges 5, 6, the ridges 5, 6 continue to apply a certain pressure to the powder in the mortar 4.

  A product discharge unit 16 is configured at a position advanced from the pressurization position by the main roll 14 and the main roll 15 along the rotation direction of the rotary plate 3 and the eaves 5 and 6. In the product discharge section 16, the lower punch 6 rises until the tip surface of the tip 63 of the lower punch 6 becomes substantially the same height as the upper end of the die hole 4, that is, the upper surface of the table 31, and the molded product in the die hole 4 is removed. Extrude from mortar 4 A guide member 17 for guiding the molded product pushed out from the mortar hole 4 is installed in the product discharge portion 16. The molded product that has exited the mortar 4 contacts the guide member 17 by the rotation of the turntable 3 and moves along the guide member 17 toward the molded product collection position 18.

  Then, as shown in FIG. 2, the lubricant injection device Z, the filling device X, the preload rolls 12 and 13, the main pressure rolls 14 and 15, and the product discharge unit 16 are arranged along the rotation direction of the rotating disk 3. Arranged in order.

  The filling device X includes a powder supply mechanism X1, a feed shoe X2, and a scraping plate X3, and sequentially fills each of the rotating mortar holes 4 with the raw material for the product. The powder supply mechanism X1 guides the powder onto the rotation path of the mortar hole 4. The feed shoe X2 drops and fills the powder supplied by the powder supply mechanism X1 into the mortar hole 4 as the lower punch 6 descends to a predetermined height position. After the powder is filled with the feed shoe X2, the scraping plate X3 scrapes off excess powder overflowing from the mortar hole 4 due to the raising of the lower punch 6 and removes it from the mortar hole 4.

  As shown in FIG. 4, the lubricant injection device Z sprays and applies a lubricant to the inner peripheral surface of the rotating mortar hole 4 and the upper end surface of the tip 63 of the lower punch 6. The lubricant prevents the powder from adhering to the inner periphery of the mortar and the tip 63 of the lower punch 6. Examples of lubricants include metal stearates (particularly zinc stearate and magnesium stearate), talc and the like.

  The lubricant supply device exists outside the powder compression molding machine. The lubricant supply device is a micro-R feeder (Nisshin Engineering Co., Ltd.) that takes out the stored powder lubricant accurately and stably through small groove filling type rolls and puts it in pressurized air. ) Product name) is known.

  As shown in FIGS. 3 to 8, the lubricant injection device Z for applying the lubricant to the inner peripheral surface of the mortar hole 4 and the upper end surface of the lower punch 6 is a nozzle that ejects the lubricant into the mortar hole 4. An inner passage Z1 that becomes the above, an injection member Z2 that feeds the lubricant supplied from the lubricant supply device into the inner passage Z1, and an upper end surface of the lower punch 6 on the inner peripheral surface of the rear mortar hole 4 ejected from the inner passage Z1. The first suction member Z3 for purge that sucks the excess lubricant that has not been adsorbed also, and the second suction that sucks the lubricant supplied to the injection member Z2 when the internal passage Z1 and the injection member Z2 do not communicate with each other. The suction member Z4 and the auxiliary member Z5 that shuts off the injection member Z2 from the second suction member Z4 when the internal passage Z1 and the injection member Z2 communicate with each other are used as elements.

  The internal passage Z <b> 1 is opened inside the turntable 3. One end of the internal passage Z <b> 1 opens on the inner peripheral surface of the mortar hole 4. The internal passage Z <b> 1 extends outward along the radial direction of the turntable 3, and the other end opens on the outer peripheral surface of the turntable 3. One internal passage Z <b> 1 exists for each of the plurality of mortar holes 4.

  The injection member Z2 faces the outer peripheral surface of the turntable 3, and injects the lubricant into the internal passage Z1 when the internal passage Z1 opening in the outer peripheral surface of the turntable 3 passes in the vicinity of the injection member Z2. . The injection member Z2 has a flow pipe Z21 extending substantially horizontally in a block made of a fluororesin (particularly polychlorotrifluoroethylene, polytetrafluoroethylene, etc.), and an inner side surface of the block at the tip of the flow pipe Z21. The injection port Z22 opened in is formed. The inner side surface of the block has a partial cylindrical shape having substantially the same diameter as the outer peripheral surface of the rotating disc 3 in plan view, and is in close proximity to the outer peripheral surface of the rotating disc 3. The inner surfaces of the flow pipe Z21 and the injection port Z22 are smooth surfaces of fluororesin.

  As shown in FIG. 5, the opening width of the injection port Z22 of the injection member Z2 gradually rotates as it goes inward along the radial direction of the turntable 3, that is, as it approaches the outer peripheral surface of the turntable 3. The shape is such that the board 3 expands along the circumferential direction (around the rotation axis). This is because a necessary and sufficient amount of lubricant flowing through the flow pipe Z21 can be injected into the internal passage Z1 by continuing to connect the injection port Z22 for a necessary and sufficient time to the internal passage Z1 of the rotating disk 3 rotating at high speed. This is the intention.

  A sealing material Z24 is provided on the inner side surface of the ejection member Z2 so as to sandwich the ejection port Z22 opening on the inner side surface. The sealing material Z24 protrudes inward from the inner surface of the injection member Z2, and always contacts the outer peripheral surface of the rotating disk 3. And it suppresses that the lubricant injected from the injection port Z22 leaks out from the clearance gap between the rotary disk 3 and the injection member Z2.

  By the way, each internal passage Z <b> 1 corresponding to each mortar hole 4 in the turntable 3 exists intermittently along the circumferential direction of the turntable 3. Therefore, a period in which the injection port Z22 of the injection member Z2 is not connected to any internal passage Z1 occurs. In the present embodiment, the pressurized air containing the lubricant is continuously supplied from the lubricant supply device to the flow passage Z21 even during the period when the injection port Z22 is not in communication with the internal passage Z1. Therefore, there is a concern that the internal pressures of the flow passage Z21 and the injection port Z22 abnormally increase during the period.

  Therefore, the injection member Z2 of the present embodiment is separately provided with a branch passage Z23 that allows the flow passage Z21 or the injection port Z22 to communicate with the outside. This branch path Z23 discharges the lubricant supplied from the lubricant supply device to the outside during a period in which the internal passage Z1 that opens to the outer peripheral surface of the table 31 of the turntable 3 is separated from the injection port Z22, and flows therethrough. It plays the role which suppresses the raise of the internal pressure of the path Z21 and the injection port Z22. In the illustrated example of the branch path Z23, one end opens at the bottom surface of the injection port Z22, extends vertically downward therefrom, and the other end opens at the lower surface of the injection member Z22.

  The first suction member Z3 is a duct connected to the suction device. The first suction member Z3 is directly above the mortar hole 4 that receives the lubricant injection from the injection member Z2 via the internal passage Z1. The lubricant that has not been adsorbed on the inner peripheral surface of the mortar 4 or the upper end surface of the lower punch 6 is sucked through the first suction member Z3. Incidentally, the lubricant sucked by the first suction member Z3 may be refluxed to the lubricant supply device via a reflux path (not shown).

  The second suction member Z4 is also a duct connected to the suction device. The second suction member Z4 is directly below the branch path Z23 opened on the lower surface of the ejection member Z2. The lubricant that has not been injected from the injection port Z23 into the internal passage Z1 of the turntable 3 flows through the branch passage Z23 and is sucked through the second suction member Z4. Incidentally, the lubricant sucked by the second suction member Z4 may be refluxed to the lubricant supply device via a reflux path (not shown).

  The auxiliary member Z5 projects outward from the outer peripheral surface of the table 31 of the turntable 3 along the radial direction. The auxiliary member Z5 is fixed with respect to the turntable 3 and rotates together with the turntable 3. The auxiliary member Z5 is at a height that is extremely close to the lower surface of the injection member Z2, and is interposed between the branch path Z23 of the auxiliary member Z2 and the second suction member Z4.

  The auxiliary member Z5 is provided with a long hole Z51 that is a passing portion that penetrates in the vertical direction and extends in a circular arc shape in plan view along the circumferential direction of the rotating disk 3. The radius of curvature of the long hole Z51 substantially matches the distance between the opening position of the branch path Z23 on the lower surface of the injection member Z2 and the rotation center of the rotating disk 3. That is, the long hole Z51 is in a position overlapping the opening of the branch path Z23 in plan view (or bottom view). In addition, a part of the long hole Z51 is closed by a lid body Z52 which is a suction blocking part. Needless to say, the long hole Z51 and the lid Z52 also rotate together with the turntable 3 as a part of the auxiliary member Z5.

  A sealing material Z25 is provided on the lower surface of the injection member Z2 so as to sandwich the branch path Z23 opening on the inner side surface. The sealing material Z25 protrudes below the lower surface of the injection member Z2 and always contacts the upward surface of the auxiliary member Z5. And it suppresses that the lubricant discharged from the branch path Z23 leaks out from the gap between the auxiliary member Z5 and the injection member Z2.

  As shown in FIGS. 4 to 6, the auxiliary member Z5 has a long time when any of the internal passages Z1 opening on the outer peripheral surface of the table 31 of the turntable 3 is connected to the injection port Z22 of the injection member Z2. The lid body Z52 that closes the hole Z51 is located immediately below the branch path Z23, and closes the branch path Z23 from below. In other words, the branch path Z23 is isolated from the second suction member Z4. Thereby, the lubricant supplied to the flow passage Z21 from the lubricant supply device is not sucked into the second suction member Z24 via the branch passage Z23, and the internal passage Z1 of the turntable 3 via the injection port Z22. Injected into.

  When the lubricant is injected into the internal passage Z1, the tip of the lower punch 6 inserted into the mortar hole 4 to which the internal passage Z1 is connected is lower than the opening position of the internal passage Z1 in the mortar hole 4. In addition, it is positioned so as to fill the mortar hole 4 with an amount of powder necessary for molding the product. Then, the lubricant injected into the internal passage Z1 is ejected from the side into the mortar hole 4 and applied to the inner peripheral surface of the mortar hole 4 and the upper end surface of the lower punch 6. At the same time, the first suction device Z3 located immediately above the mortar hole 4 works so as to suck up the lubricant ejected from the internal passage Z1, and while applying the lubricant evenly to the upper end of the mortar hole 4, the surplus This lubricant can be excluded from the mortar hole 4.

  On the other hand, as shown in FIGS. 7 and 8, at the time when none of the internal passages Z1 opening on the outer peripheral surface of the table 31 of the turntable 3 is connected to the injection port Z22 of the injection member Z2, the auxiliary member Z5 A portion of the long hole Z51 that is not blocked by the lid body Z52 is located immediately below the branch path Z23, and opens the branch path Z23 downward. In other words, the branch path Z23 is communicated with the second suction member Z4. As a result, unnecessary lubricant supplied from the lubricant supply device to the flow passage Z21 and not injected into the internal passage Z1 is sucked and collected by the second suction member Z24 via the branch passage Z23.

  In the production process of the product, the injection member Z2 for the mortar hole 4 and the lower punch 6 is disposed on the inner peripheral surface of the mortar hole 4 and the upper end surface of the tip 63 of the lower punch 6 through the internal passage Z1 passing through the vicinity. Lubricate and apply. The lubricant that has not been adsorbed in the mortar 4 or the ridge 6 is sucked by the suction members Z3 and Z4.

  Subsequently, the filling device X fills the powder in the mortar 4 that passes in the vicinity (already coated with the lubricant). After that, the upper punch 5 and the lower punch 6 are pressed by the pre-loading rolls 12 and 13 to pre-compress the powder in the mortar hole 4 and further pressed by the main-pressure rolls 14 and 15 to be powdered in the mortar hole 4. Compress this. As a result, a product obtained by compression molding the powder is completed.

  In the present embodiment, the rotary plate 3 provided with the mortar hole 4 penetrating up and down and filled with the powder that is the raw material of the compression molded product, and the internal passage Z1 opening in the inner peripheral surface of the mortar hole 4, A lower punch 6 which is disposed below the mortar 4 and rotates with the rotating disk 3 and whose upper end 63 is inserted into the mortar 4 and is slidable, and the mortar so as to face the lower punch 6. 4, which is arranged above 4 and rotates together with the rotating disk 3, and has a lower end 53 inserted into the mortar hole 4 and is slidable, and the mortar hole 4 before being filled with the powder and An injection member Z2 for injecting lubricant from the side of the mortar hole 4 to the upper end surface of the lower punch 6 inserted in the mortar hole 4 through the internal passage Z1, and the internal passage Z1 to The first suction member Z3 for sucking the lubricant injected into the mortar hole 4 and the blast hole 4 injected into the mortar hole 4 through the internal passage Z1. A second suction member Z4 that sucks in the lubricant, and rotates together with the rotating disk 3, and when the injection member Z2 and the internal passage Z1 communicate with each other, between the injection member Z2 and the second suction member Z4. A rotary type provided with a suction blocking part Z52 to be shut off and an auxiliary member Z5 having a passage part Z51 for communicating between the injection member Z2 and the second suction member Z4 when the injection member Z2 and the internal passage Z1 do not communicate with each other. A powder compression molding machine was constructed.

  According to the present embodiment, a necessary and sufficient amount of lubricant can be applied to substantially the entire inner peripheral surface of the mortar hole 4 and the upper end surface of the lower punch 6. In particular, molding for filling and compressing a relatively large amount of powder, such as nuclear fuel pellets, into the mortar hole 4 (the position of the lower punch 6 is low and the mortar hole 4 is deep when filling the powder) In the machine, the lubricant can be applied evenly (without lack) to the inner peripheral surface of the deep mortar hole 4 and the upper end surface of the lower punch 6 serving as the bottom of the mortar hole 4, and the molded product by binding or sticking Defects can be suppressed. In addition, the upper surface of the turntable 3 is difficult to adhere to the lubricant, and the risk of the lubricant being mixed into the molded product can be reduced.

  In addition, since the first suction member Z3 is located above the mortar hole 4, the excess lubricant that has not been adsorbed on the inner peripheral surface of the mortar hole 4 or the upper end surface of the lower punch 6 is sucked into the mortar. Not only can it be removed from within the hole 4, it can also contribute to spreading the lubricant to the upper end of the mortar hole 4.

  The internal passage Z1 extends from the inner peripheral surface of the mortar hole 4 to the outer side along the radial direction and opens to the outer peripheral surface of the rotating disk 3, and the injection member Z2 is formed on the rotating disk 3. It faces the outer surface. The injection port Z22 of the injection member Z2 has a shape that expands along the circumferential direction of the rotating disk 3.

  Therefore, when the internal passage Z1 that opens to the outer peripheral surface of the rotating disk 3 passes in the vicinity of the flow pipe Z21 of the injection member Z2, the lubricant is injected into the injection member Z2, thereby the lubricant is It is injected into the internal passage Z1 and injected into the mortar hole 4.

  Therefore, with such a configuration, the injection member Z2 can be stationary, and the structure and mechanism are simplified.

The present invention is not limited to the embodiments described in detail above.
For example, in the above embodiment, the auxiliary member Z5 is a separate member from the rotating disk 3, but the auxiliary member Z5 may be integrally formed with the rotating disk 3 (integrated with the rotating disk 3). .

  Other specific configurations of each part can be variously modified without departing from the spirit of the present invention. For example, the auxiliary member Z5 is not installed, and a switching valve (air or an electrically operated valve or the like) is provided in the middle of the injection member Z2 and the lubricant supply device instead of Z5 itself, and the position / position of each internal passage Z1 and the injection member Z2 The changeover valve is switched to the main supply side only at the timing when the orbit matches, and the lubricant is flowed to the second suction side described in the text except at the timing. In that case, the branch path Z23 of the injection member Z2 becomes unnecessary.

  INDUSTRIAL APPLICATION This invention can be utilized as a compression molding machine for compressing powder and manufacturing products, such as a nuclear fuel pellet, a pharmaceutical tablet, a foodstuff, an electronic component, a machine part.

DESCRIPTION OF SYMBOLS 3 ... Rotary disk 4 ... Mortar hole 5 ... Upper punch 6 ... Lower punch Z1 ... Internal passage Z2 ... Injection member Z23 ... Branching path Z3 ... First suction member Z4 ... Second suction member Z5 ... Auxiliary member Z51 ... Passing part Z52 ... Suction prevention part

Claims (3)

A mortar hole that penetrates up and down and is filled with powder that is a raw material of a compression molded product, and a rotary disk provided with an internal passage that opens to the inner peripheral surface of the mortar hole;
A lower arm that is disposed below the mortar, rotates with the rotating disk, and has an upper end inserted into the mortar and slidable;
An upper arm that is disposed above the mortar so as to face the lower heel, rotates with the rotating disk, and has a lower end inserted into the mortar and slidable;
An injection member for injecting a lubricant from the side of the mortar through the internal passage to the upper end surface of the mortar and the lower punch inserted in the mortar before filling with the powder;
A first suction member for sucking the lubricant injected into the mortar through the internal passage;
A second suction member for sucking a lubricant that is supplied to the injection member but not injected into the internal passage when the injection member and the internal passage do not communicate with each other;
When the rotation member rotates together with the suction plate and the injection member and the internal passage communicate with each other, a suction blocking portion that blocks between the injection member and the second suction member, and when the injection member and the internal passage do not communicate with each other A rotary powder compression molding machine comprising: an auxiliary member having a passage portion for communicating between an injection member and a second suction member. The rotary powder compression molding machine according to claim 1, wherein the first suction member is located above the mortar hole. The internal passage extends from the inner peripheral surface of the mortar hole to the outer side along the radial direction, and is open to the outer peripheral surface of the rotating disk,
The injection member faces the outer peripheral surface of the rotating disk, and the lubricant is injected from the injection member into the inner passage when the internal passage opening in the outer peripheral surface of the rotating disk passes in the vicinity of the injection member. The rotary powder compression molding machine according to claim 1 or 2.

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