JP2004188498A - Rotary type powder compression molding machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rotary type powder compression molding machine capable of consistently maintaining hardness of a molded product. <P>SOLUTION: A plurality of mortars are provided on a rotary disk in a horizontally rotatable and attachable/detachable manner by a vertical shaft at a predetermined pitch in a frame. An upper pounder and a lower pounder are held in a vertically slidable manner above and below each mortar. Powder filled in each mortar is compression-molded by setting at least the rotary disk at a substantially constant temperature, and passing the upper and lower pounders with each pounder tip inserted in each mortar through between upper and lower rolls. The rotary type powder compression molding machine comprises an introduction pathway which is provided in the vertical shaft to introduce the medium to keep the temperature of at least the rotary shaft to be a substantially constant preset value to the rotary disk from a lower end side of the vertical shaft, a medium passage which is provided in the rotary disk to be communicated with the introduction pathway, and a discharge pathway which is provided inside the vertical shaft to discharge the medium returned through each medium passage from the lower end side of the vertical shaft outside. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

  The present invention relates to a rotary powder compression molding machine for compressing powder to form tablets, foods and the like.

  As a rotary powder compression molding machine for molding tablets, electronic components, etc., a rotating disk is arranged in a frame so as to be horizontally rotatable via a vertical shaft, and a plurality of dies are arranged on the rotating disk at a predetermined pitch. By providing the upper punch and lower punch so that it can slide up and down above and below each mill, and by passing the tip of the punch into the upper and lower punches inserted into the mill, between the upper roll and lower roll 2. Description of the Related Art There is known a method in which powder filled in a die is compression-molded.

In such a rotary powder compression molding machine, there is a rotary powder compression molding machine in which a passage for circulating cooling water is formed in a rotary disk, and sticking is prevented by maintaining an appropriate temperature in a die ( See, for example, Patent Document 1. In addition, when cold or warm air is blown onto the upper and lower punches to compress and mold a low melting point powder material that is easily melted at a high temperature, it is possible to prevent the powder material from adhering to the tip of the punch, or during compression molding. A device that prevents thermal expansion of a punch is also known (for example, see Patent Document 2).
Japanese Patent No. 2821089 Japanese Utility Model Publication No. 7-39515

  By the way, in recent studies, it has been found that in the case of compressing and molding a tablet raw material powder, a tablet is formed stably when the temperature of the entire apparatus rises to some extent and becomes almost constant. This is because the temperature inside the device rises due to the heat generated in the sliding parts such as the motor that rotates the upright shaft and the punch until a certain time elapses after tableting (formulation) starts. This is because the fluctuation of the temperature inside the device is reduced. That is, while the temperature inside the device is rising, the pressure at the time of molding slightly changes, for example, because the length of the punch increases with the temperature rise. Therefore, while the temperature is rising, in other words, until the temperature is saturated, the pressure during molding is unstable, and the hardness of the compression-molded molded product varies.

  In view of such a problem, in a normal rotary powder compression molding machine, an operator checks the temperature state until the temperature inside the apparatus becomes almost constant (saturated), and the temperature is kept constant. After that, unmanned driving is started. Therefore, manual operation is required before the automatic operation is performed, which is a factor that increases the manufacturing cost.

  On the other hand, in the above-mentioned conventional rotary powder compression molding machine, since the cooling water is circulated so as to be effective only for the die, the punch cannot be maintained at a substantially constant temperature. Therefore, during operation, the compression pressure changes due to a change in the size of the punch, and it has been difficult to stabilize. In addition, when hot air is blown to the upper and lower punches, the punches are heated before the mortar, so if the processing accuracy of the outer diameter of the punch tip and the inner diameter of the mortar hole is not improved, the punch tip fits into the mortar hole. There was a possibility of doing it.

  An object of the present invention is to solve such a problem.

  This application takes the following measures in order to achieve such an object. That is, the rotary powder compression molding machine of the invention according to claim 1 of the present application is arranged such that a rotary disk is horizontally rotatable and detachable via a vertical shaft in a frame, and a plurality of rotary disks are mounted on the rotary disk. While providing the mortar at a predetermined pitch, the upper punch and the lower punch are held vertically slidably above and below each mill, and at least the rotating plate is kept in a substantially constant temperature state and the punch tip is inserted into the die. A rotary powder compression molding machine for compressing powder filled in a die by passing a lower punch and an upper roll and a lower roll between the upper roll and the lower roll. An introduction path for introducing a medium that causes the medium to be in a substantially constant temperature state at the set temperature from the lower end side of the upright shaft to the rotating disk; a medium passage provided in the rotating disk and communicating with the introduction path; Each media passage provided inside Characterized by comprising a discharge path for discharging to the outside the medium back through the lower end of the upright shaft.

  According to such a configuration, in a case where the rotating disk can be removed from the upright shaft, since the medium is introduced into the rotating disk from the lower end of the upright shaft via the upright shaft, at least the rotating disk can be easily brought to a substantially constant temperature state. Will be possible. That is, when the medium is introduced into the turntable via the introduction path, the medium flows through the medium path and is discharged via the discharge path. In this manner, when the medium flows through the rotating disk, the temperature of the rotating disk converges to the temperature of the medium, and the temperature of the rotating disk becomes substantially constant at the set temperature. The upper and lower punches movably mounted are also substantially in a constant temperature state.

  Therefore, the elongation due to the temperature change of the upper punch and the lower punch can be minimized, and the time required for compression molding of the powder can be reduced. Therefore, it is possible to improve the productivity, and it is possible to suitably use the powder whose temperature limits tableting.

  In order to bring the upper and lower punches into a substantially constant temperature state, including the rotary disk, the rotary disk must have a lower punch holding portion for holding the lower punch, a die portion to which the die can be detachably attached, and an upper punch for holding the upper punch. A punch distribution portion formed in connection with the lower punch retention portion and the die portion and connected to the introduction path, and an annular distribution passage connected to the upper punch retention portion and the discharge route. Preferably, a collecting passage is separately provided, and one end of each of the medium passages is connected to the distribution passage, and the other end is connected to the collecting passage. With such a configuration, the upper and lower punches are more efficiently kept at the set temperature more efficiently together with the rotating disk, so that a change in the dimensions of the punches due to the temperature can be minimized.

  In the rotary powder compression molding machine according to the invention of claim 3 of the present application, a rotary disk is horizontally rotatable via a vertical shaft in a frame, and is detachably provided. While providing the mortar at a predetermined pitch, the upper punch and the lower punch are held vertically slidably above and below each mill, and at least the rotating plate is kept in a substantially constant temperature state and the punch tip is inserted into the die. A rotary powder compression molding machine in which the powder filled into the die is compression-molded by passing a lower punch and an upper roll and a lower roll between the upper roll and the lower roll. And an air ejector for ejecting air from the respective outlets to the rotating disk so that at least the temperature of the rotating disk becomes substantially constant at a set temperature.

  According to such a configuration, in the case where the rotating disk can be detached from the upright shaft, air whose temperature is adjusted is blown out from below the rotating disk from the air ejector, so that the rotating disk can be easily moved up and down. The upper punch and the lower punch, which are movably attached, can be kept in a substantially constant temperature state. As described above, the upper punch and the lower punch, which are in a substantially constant temperature state, enable stable compression molding of the powder and improve productivity. Further, it is possible to suitably use the powder for which tableting is restricted by the temperature.

  In order to stabilize at least the temperature of the turntable, an inlet temperature sensor that measures the temperature of the air introduced into the air ejector, a turntable temperature sensor that measures the temperature of the turntable, an inlet temperature sensor and a turntable temperature Preferably, an air supply device is provided that controls the temperature of air to be a set temperature based on output signals output from the sensors and supplies air to the air ejector.

  Since the present invention has the above-described configuration, at least the rotating disk can be easily brought to a substantially constant temperature state in a rotating disk that can be removed from the upright shaft. By setting the rotating disk at a substantially constant temperature at the set temperature, the upper punch and the lower punch attached to the rotating disk so as to be vertically slidable by heat conduction can be also substantially constant temperature.

  Therefore, the elongation due to the temperature change of the upper punch and the lower punch can be minimized, and the time required for compression molding of the powder can be reduced. Therefore, the productivity can be improved, and the powder can be suitably used for powders whose compression molding is restricted by temperature.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

  FIG. 1 is a sectional view showing the entire configuration of the rotary powder compression molding machine of the present invention. In this rotary powder compression molding machine, a rotating disk 3 is disposed in a frame 1 via a vertical shaft 2 so as to be horizontally rotatable, and a plurality of dies 4 are provided on the rotating disk 3 at a predetermined pitch. An upper punch 5 and a lower punch 6 are vertically slidably held above and below, respectively. On the other hand, at a predetermined rotation phase position of the rotating disk 3, the upper end of the upper punch 5 with the tip of the punch inserted into the die 4 and the lower end of the lower punch 6 with the tip of the punch inserted into the die 4, respectively, pass over time. An upper roll 71 and a lower roll 72 are axially attached to a position to be attached. The upper roll 71 and the lower roll 72 push the upper punch 5 and the lower punch 6 into the dies 4, respectively, and fill the dies 4. The powder is compacted. In this embodiment, the upper roll 71 is slidably attached to the lower surface of the cross beam portion of the upper frame. The upper roll 71 is always fixed to the frame 1 by bolts (not shown), and can be slid in the rear direction when the fixing is released.

  In order to make the configuration of the upper and lower rolls 71 and 72 easier to understand, the upper and lower rolls 71 and 72 are shown in a side view in FIG. Only one of them is shown. In addition, in order to clearly show the positional relationship among the frame 1, the upright shaft 2, the rotating disk 3, and a lifting mechanism and a guide mechanism, which will be described later, illustration of a powder supply device, a molded product take-out unit, and the like is omitted.

  More specifically, an upright shaft 2 supported by a bearing 21 is disposed substantially at the center of the frame 1, and a worm wheel 22 is fixed near the lower end of the upright shaft 2. The rotational driving force of the driving motor 25 is transmitted to the wheel 22 via the worm 23 and the belt 24. In the vicinity of the upper end of the upright shaft 2, a turntable 3 divided into three functional parts is detachably fixed.

  The upright shaft 2 has a lower clutch plate 81 attached to the upper end thereof to form the meshing clutch 8 as a joint mechanism in order to make the turntable 3 detachable. Specifically, the lower clutch plate 81 is formed of a ring-shaped hearth gear, and forms a meshing clutch 8 with an upper clutch plate 82, which will be described later, attached to the lower end of the rotating shaft 3a of the rotating disk 3. As shown in FIG. 2, the lower clutch plate 81 has an annular shape, and a plurality of claws 81a are provided on the upper surface of the outermost peripheral portion. The lower clutch plate 81 has substantially the same shape as the upper clutch plate 82, and is configured to be fixed with a plurality of bolts in a plane portion inside the claw 81a. The shape of the claw 81a of the lower clutch plate 81 is, for example, substantially trapezoidal when viewed from the side, and a circumferential side surface has a convex shape. On the other hand, the shape of the claw 82a of the upper clutch plate 82 has a concave side surface in the circumferential direction corresponding to the claw shape of the lower clutch plate 81.

  In addition, a cylindrical hollow portion along the axis is provided in the vicinity of the axis of the upright shaft 2 so that the temperature of the turntable 3 becomes substantially constant at a set temperature at least in the hollow portion. An introduction route I and a discharge route O for circulating the medium to be discharged are provided. The introduction path I and the discharge path O are formed concentrically, and a pipe I1 having a diameter smaller than the inner diameter of the hollow part is inserted into the hollow part to form the introduction path I, and the gap between the pipe I1 and the hollow part is defined as the discharge path O. Is what you do.

  In order to provide the introduction path I and the discharge path O in this manner, a connecting pipe C having a medium introduction connection part C1 and a medium discharge connection part C2 shown in FIG. . The connection pipe C has a structure in which there is an introduction pipe C3 into which a medium to be introduced flows into a central portion thereof, and a rotary pipe C4 is rotatably attached to the outside of the introduction pipe C3. The medium discharged into the gap with the pipe C4 flows. The introduction pipe C3 communicates with the pipe I1, while the rotary pipe C4 communicates with the hollow portion of the upright shaft 2. The introduction pipe C3 communicates with the medium introduction connection part C1, and the rotating pipe C3 communicates with the medium discharge connection part C2.

  Further, a concave portion having a smaller diameter than the space inside the lower clutch plate 81 is provided at the upper end of the upright shaft 2, and a connection bushing B shown in FIG. The connection bushing B has a shape in which a mounting flange B1 is provided at one end of a column having a space therein, and is open to one side from the center of the upper surface and is opened to the center of the lower surface to be an introduction path. A first passage portion B2 communicating with I, and a second opening B3 that opens toward the other side from the center of the upper surface and opens toward the outer peripheral side of the lower surface and communicates with the discharge path O. Then, via the connection bushing B, the introduction path I and the discharge path O in the upright shaft 2 communicate with the introduction path Ia and the discharge path Oa provided on the rotating shaft 3a of the turntable 3.

  The rotating disk 3 has a rotating shaft 3 a connected to the upright shaft 2 via an upper clutch plate 82. As described above, the upper clutch plate 82 has a shape similar to that of the lower clutch plate 81, and is attached with the plurality of claws 82a facing downward, and each of the claws 82a is engaged with the claw 81a of the lower clutch plate 81. By joining, the rotating shaft 3 a is detachably connected to the upright shaft 2. As shown in FIG. 5, the turntable 3 is provided at a lower portion thereof and holds a lower punch 6 so that the lower punch 6 can be slid up and down, and is provided at an upper portion and slides the upper punch 5 up and down. It comprises an upper punch holding portion 32 movably held, and a die portion 33 provided between the upper punch holding portion 32 and the lower punch holding portion 31 to detachably mount the die 4. The upper punch holding portion 32 and the lower punch holding portion 31 are each provided with a plurality of punch holding holes for holding the upper punch 5 and the lower punch 6 slidably. A plurality of die holding holes for detachably holding the die 4 are formed in the die portion 33. In the rotary disk 3, the lower punch 6, the upper punch 5, and the mill 4 are positioned so that their centers are located on the same straight line.

  An annular groove is formed in the lower punch holding portion 31 and the die portion 33, and an annular collecting passage is formed by bringing the lower punch holding portion 31 and the die portion 33 into close contact with each other. That is, the upper surface of the lower punch holding portion 31 is provided with a lower annular groove 31a that opens upward centering on the axis of the turntable 3, while the lower surface of the An upper annular groove 33a that opens downward about the axis of is provided. The lower annular groove 31a has a depth of about の of the thickness of the lower punch holding portion 31, and the upper annular groove 33a has a depth of about ／ of the thickness of the die 33. I'm doing The upper and lower annular grooves 31a and 33a are formed with the same radius, and have the same opening size. The lower punch holding portion 31 and the die 33 are brought into close contact with each other to open the respective annular grooves 31a and 33a. Overlap to form a collective passage D which is a closed annular space. The collecting passage D communicates with a discharge passage Oa provided in the upright shaft 2 via a horizontal branch passage 91 provided in the die 33 and a horizontal introduction branch 93 provided in the rotary shaft 3a.

  By adopting such a structure, the target collecting passage D can be formed without closing the openings of the lower and upper annular grooves 31a, 33a with separate members. In the upper annular groove 33a provided in the mortar portion 33, a portion in which the periphery on the mortar 4 side, that is, the outer periphery protrudes toward the mortar 4 side is formed. As a result, the upper annular groove 33a passes very close to the mill 4, so that heat conduction to the mill 4 is improved and the strength of the mill 33 is not reduced.

  In the upper punch holding portion 32, an annular distribution passage E is similarly provided in a portion inside the collecting passage D. The distribution passage E is formed by closing an annular groove provided on the lower surface of the upper punch holding portion 32 with the upper surface of the die portion 33 being opened around the axis of the rotating disk 3. Therefore, the distribution passage E does not require a separate member for closing the opening, thereby improving the economic efficiency and simplifying the structure. The distribution passage E communicates with the introduction path I provided also in the upright shaft 2 via the horizontal branch passage 92 and the horizontal introduction branch passage 94.

  As shown in FIGS. 6 and 7, a medium passage F is provided radially with respect to the distribution passage E and the collecting passage D. Specifically, in the lower punch holding portion 31, the medium passage F communicates with the first lateral branch passage F1 having one end communicating with the collecting passage D, and the other end of the first lateral branch passage F1. And a second horizontal branch passage F3 formed so as to overlap the lower side of the first horizontal branch passage F1 and communicated with the first vertical branch passage F2 located outside the lower punch 6. The first and second lateral branch passages F1 and F3 are formed by drilling from the side surface of the lower punch holding portion 31, and the opening on the side surface of the lower punch holding portion 31 is closed by a closing plug. The second horizontal branch passage F3 is arranged to pass below the lower annular groove 31a. The first and second horizontal branch passages F1 and F3 are provided between the lower punches 6 at a pitch of, for example, three lower punches 6, and communicate with each other by the first vertical branch passage F2 near the outer peripheral portion of the lower punch holding portion 31. Is done. The other end of the second horizontal branch passage F3, that is, the side of the vertical shaft 2 is communicated with the collecting passage by a second vertical branch passage F4 provided inside the collecting passage D. In each of the lateral branch passages described below, the lower punch 6 and the upper punch 5 are provided in the same manner as described above.

  On the other hand, a third vertical branch passage F5 parallel to the upright shaft 2 communicating with the second vertical branch passage F4 is provided in the mill portion 33. The upper end of the third vertical branch passage F5 is opened directly below the distribution passage E, and the lower vertical punch holding portion 31 and the die portion 33 are brought into close contact with each other so that the third vertical branch passage F5 is distributed. It communicates with the passage E. In the mortar portion 33, a fourth vertical branch passage F6 is provided which communicates with the upper annular groove 33a forming the collecting passage D and opens on the upper surface of the mortar portion 33. The fourth vertical branch passage F6 communicates with the fifth vertical branch passage F7 of the upper punch holding portion 32. The fifth vertical branch passage F7 is located outside the distribution passage E, extends upward from directly above the fourth vertical branch passage F6, and then extends horizontally to the vicinity of the upper punch 5 in a third horizontal branch passage F8. Communicate. Further, the third horizontal branch passage F8 is connected to the fourth horizontal branch passage F10 communicating with the distribution passage E via the sixth vertical branch passage F9 by the seventh vertical branch passage F11 near the side surface of the upper punch holding portion 32. Communicate. Needless to say, the passages, passages, pipes, and connection portions of the connection bushing B through which the medium passes are provided with a seal structure to prevent the medium from leaking and are made liquid-tight.

  The rotating body 3 has an elevating body G1 that forms an elevating mechanism G fixed to the center of the upper surface thereof. As shown in FIG. 8, the elevating body G1 has a mounting flange G1a at its lower end, and a rotatable pair of upper ends at its upper end to reduce friction when the turntable 3 is pulled out. Roller G1b. The elevating body G1 has a shape in which a flange G1a is integrally provided at a lower end of a round bar member, and a shaft portion G1c for attaching a roller G1b is integrally provided at an upper end thereof, and is turned rearward above the flange G1a. A suspending portion G1d is formed for attaching an arm of a suspending vehicle (not shown) such as a forklift that moves by suspending the turntable 3 by flattening a side surface portion. The elevating body G1 is fixed by fastening a flange G1a to an upper portion of the turntable with a bolt (not shown).

  On the other hand, an elevating device G2 constituting the elevating mechanism G is mounted on the upper part of the upper frame 1b. The elevating device G2, as shown in FIG. 9, converts a reversible motor G21, an elevating shaft G22 having a lower end detachable from the elevating body G1, and a driving force of the motor G21 into an elevating operation of the elevating shaft G22. And a motion conversion mechanism C that raises and lowers the turntable 3. As shown in FIG. 10, the elevating shaft G22 has, at the lower end thereof, a housing part G22a which houses a pair of rollers G1b attached to the elevating body G1 and has an outlet for rolling out the rollers G1b to a rail 40 described later. And a male thread portion G22b provided in the worm wheel H1 to be described later and screwed with the thread portion H1a at the central portion in the longitudinal direction. The portion above the male thread portion G22b remains a round bar body, and a tip on the side facing the side of the frame 1 for holding the lifted state when the turntable 3 is raised to a predetermined position. A lock hole G22c for fitting the tapered holding rod r is formed. The elevating device G2 has a function of raising the turntable 3 and pressing the turntable 3 against the upright shaft 2 at a position where the turntable 3 is lowered. Thus, it is not necessary to fix the upper clutch plate 82 of the engagement clutch 8 to the lower clutch plate 81 with bolts or the like in the engaged state.

  The motion conversion mechanism H includes a worm H5 as a drive gear attached to a rotation drive shaft H4 that is rotationally driven via a spur gear body H2 and a spur gear H3 having a built-in torque limiter attached to the output shaft of the motor G21. A worm wheel H1 which is a gear body meshing with the worm H5; and a movement limiting plate H6 for inhibiting the worm wheel H1 from moving up and down. The worm wheel H1 is provided with a female screw H1a at the center thereof, which is screwed with the male screw G22b of the elevating shaft G22. When the motor G21 rotates, the worm H5 rotates and the worm wheel H1 rotates. However, since the movement of the worm wheel H1 is prohibited by the movement restricting plate H6, the worm wheel H1 is moved to the female thread H1a of the worm wheel H1. The screwed up / down shaft G22 is screwed forward.

  When the turntable 3 is raised to a predetermined position, a rail RL serving as a guide mechanism for guiding the roller G1b attached to the lifting / lowering body G1 from below the lifting / lowering device G to the front end of the frame 1 is provided at the upper part of the frame 1, that is, at the upper part. It is attached to the frame 1b. The rail RL has a structure in which a long plate material is inserted into a groove formed in the upper frame 1b and fixed by bolts (not shown). That is, when the rotary platen 3 is moved to a predetermined position, the rail RL is configured such that the upper surface, that is, the guide surface RLa on which the roller G1b rolls, and the bottom surface of the storage portion G22a of the elevating shaft G22 are substantially flush. , Are attached to the horizontal beam of the upper frame 1b. The rail RL has, for example, a plate-like sliding member made of ultra-high molecular weight polyethylene adhered to the upper surface thereof. Since the plate-shaped sliding member is attached in this manner, it becomes possible to smoothly and stably guide the turntable 3 as a heavy object to the outside by functioning in combination with the roller G1b. When the tablet is manufactured, that is, when the work of removing the turntable 3 is not performed, the rail RL is closed from below so that powder scattered from below does not adhere to the upper surface. It is.

  In such a configuration, when the molded product can be manufactured at all times, the elevating shaft G22 and the elevating body G1 are connected while the roller G1b at the upper end of the elevating body G1 is stored in the storage part G22a of the elevating shaft G22. are doing. In this state, the elevating shaft G22 is lowered to the lowest position, so that the roller G1b is pressed downward in the storage portion G22a. Since the elevating shaft G22 is connected to the motor G21 via the torque limiter, the elevating shaft G22 does not rise even when the rotating disk 3 rotates and receives pressure from below in this pressed state. . Therefore, the rotating disk 3 is pressed against the upright shaft 2 by the lifting mechanism G, and the meshing clutch 8 is in the engaged state, the upright shaft 2 and the rotating disk 3 are connected, and the meshing clutch 8 There is no need to fix the upper clutch plate 82 and the lower clutch plate 81 with bolts or the like.

  Then, when power is supplied to the driving motor 25, the turntable 3 is driven to rotate by rotation of the upright shaft 2. Since the rotating clutch 3 and the upright shaft 2 are connected to each other in a state where the plurality of claws 81a and 82a are engaged, even if the load intermittently changes during tableting, the engagement clutch 8 has a plurality of claws. Since the state of engagement between 81a and 82a is hardly changed, it is possible to prevent rattling without causing partial wear.

  Next, when the turntable 3 is to be removed, the medium is discharged from the discharge path O, and the upper roll 7 fixed to the upper frame 1b is moved in the rear direction so that the turntable 3 is inserted into the upper frame 1b. Is performed after forming a space that can move upward. When the motor G21 of the elevating device G is moved forward after the upper roll 7 is moved, the worm H5 rotates and the worm wheel H1 is rotationally driven. When the worm wheel H1 rotates, a screwing force is generated between the female screw portion H1a and the male screw portion G22b, but the worm wheel H1 prevents the vertical movement of the worm wheel H1 from moving in the axial direction of the elevating shaft G22. , The elevating shaft G22 moves upward. Then, when the roller G1b of the elevating body G1 reaches the position of the rail RL, when the rising position is detected by, for example, a limit switch or the like (not shown) and the power supply to the motor G21 is stopped, the turntable 3 rises to a predetermined position. . Here, the holding rod r is screwed toward the elevating shaft G22, and its tip is fitted into the lock hole G22c of the elevating shaft G22 to hold the turntable 3 so as not to fall in an unexpected situation (FIG. 11). In this case, the upper punch 5, the lower punch 6, the lowering device 31, and the like are moved up together with the rotary disk 3. That is, it is not necessary to remove the lower punch 6, the lowering device 31, and the like from the rotating disk 3 when removing the rotating disk 3.

  When the turntable 3 is moved to the predetermined position in this manner, the roller G1b of the elevating body G1 can be rolled on the rail 40. Here, a lid (not shown) closing the rail RL is removed. Thereby, a space in which the elevating body G1 can move is formed between the rails RL. Then, in this state, when the turntable 3 is pulled outward, the roller G1b rolls on the rail RL, and the turntable 3 is guided outward. In order to take out the turntable 3 from the inside of the frame 1 to the outside, the arm of the suspended vehicle is inserted into the frame 1 and the arm is attached so as to sandwich the suspension portion G1c of the elevating body G1. The turntable 3 is supported. Thereafter, the suspended vehicle is moved away from the rotary powder compression molding machine, and the turntable 3 is taken out of the frame 1.

  As described above, since the turntable 3 can be detached from the upright shaft 2 and held at the front position of the frame 1 by the rail RL, workability such as cleaning can be improved. In other words, even if the installation location of the rotary powder compression molding machine is small, there is no need for a space for a machine for holding the rotary plate 3 at a position away from the upright shaft 2, so that the rotary powder compression molding machine can be rotated even in a small room. Cleaning of the inside of the powder compression molding machine and cleaning of the turntable 3 can be facilitated. Further, since the turntable 3 is moved up and down by the elevating mechanism G provided on the upper portion of the frame 1, the turntable 3 can be attached and detached safely and without the operator being stained with oil. Moreover, when removing the turntable 3, there is no need to remove the upper punch 5, the lower punch 6, the lowering device 31, and the like, so that the working time can be reduced. Moreover, since the elevating mechanism G is provided between the upper portion of the frame 1 and the turntable 3, the lower side of the turntable 3 can be washed with water. In other words, even if the inside of the apparatus below the turntable 3 is washed with water, the elevating mechanism G is located above the turntable 3, so that no water is sprayed. Therefore, cleaning becomes easy.

  When the turntable 3 is connected to the upright shaft 2, the roller G1b of the elevating body G1 is placed on the rail RL and is pushed in the rear direction to move the roller G1b to near the inner end of the rail R1. Is pushed in, the roller G1b is housed in the housing portion G22a of the elevating shaft G22, and the elevating body G1 and the elevating shaft G22 are connected. In this state, the turntable 3 is stopped immediately above the upright shaft 2 without performing the positioning operation. Therefore, the motor G21 of the elevating mechanism G is reversed to lower the turntable 3 to the vicinity of the upright shaft 2. . Then, the positions of the positioning holes provided on the rotating shaft 3a of the rotating disk 3 and the positioning pins on the upper surface of the upright shaft 2 are matched, and the rotating disk 3 is further lowered to engage the lower clutch plate 81 with the upper clutch plate 82. Then, the upright shaft 2 and the turntable 3 are connected to each other while the lifting shaft G22 is generating a downward force. As described above, by pressing the elevating body G1 by the elevating shaft G22, the upper clutch plate 82 and the lower clutch plate 81 can be connected without fixing them with bolts or the like, and the connecting work between the upright shaft 2 and the turntable 3 can be performed. Can be easier. In addition, since the connection bushing B is attached to the upper end of the upright shaft 2, the introduction path Ia and the discharge path Oa provided on the rotating shaft 3a of the turntable 3 can be introduced into the upright shaft 2 without positioning. It can be connected to the path I and the discharge path O in a watertight manner.

  Note that the present invention is not limited to the embodiments described above. In the above-described embodiment, the description has been made of the coupling mechanism having a meshing clutch as a main component. However, the shape of the concave portion at the lower part of the turntable is formed into a truncated cone, while the upper end of the vertical shaft corresponds to the shape of the concave portion. Then, a frusto-conical tapered projection may be used to form a so-called conical clutch. In this case, since the clutch itself is configured to be taperedly engaged, the positioning pin used in the above embodiment can be omitted.

  Next, when compressing the powder, the temperature of the rotating disk 3, the upper and lower punches 5, 6, and the like are maintained at a set temperature, for example, about 30 to 40 ° C., so that the compression pressure at the time of powder compression molding is maintained. Changes can be minimized. This is because the elongation of the upper punch 5 and the lower punch 6 becomes saturated during operation by setting the temperatures of the rotary plate 3 and the upper and lower punches 5 and 6 to be substantially constant. . To this end, in the above-described configuration, hot water, which is a medium heated to a predetermined temperature from the introduction path I, is supplied to the medium passage D, and the turntable 3, the upper and lower punches 5, 6 are heated.

  Specifically, the hot water flows from the medium introduction connection portion C1 of the connection pipe C into the distribution passage E via the introduction pipe C3, the introduction path I, the horizontal introduction branch 94, and the horizontal branch passage 92. The hot water flowing into the distribution passage E flows into the medium passages F (the sixth vertical branch passage F9, the fourth horizontal branch passage F10, the third horizontal branch passage F8) formed radially from the distribution passage E, and flows into the upper punch 5 And flows into the medium passage F (the second vertical branch passage F4, the second horizontal branch passage F3, the first vertical branch passage F2, the first horizontal branch passage F1) of the mortar portion 33 and the lower punch holding portion 31. The lower punch 6 is heated. The warm water that has passed through the medium passage F flows into the collecting passage D, thereby heating the mill 4. Then, the hot water flowing into the collecting passage D is discharged from the discharge path O to the outside through the horizontal branch passage 91 and the horizontal discharge branch 93.

  In this way, by repeatedly circulating the hot water introduced from the introduction path I through the distribution path E, the medium path F, and the collecting path D and discharging it from the discharge path O, the rotating disk 3, the dies 4, The punch 5 and the lower punch 6, as well as the upper roll and the lower roll, can be heated to keep them at a substantially constant temperature. By maintaining the rotating plate 3, the dies 4, the upper punch 5, the lower punch 6, the upper roll 71 and the lower roll 72 in a substantially constant temperature state, the dimensional change of the upper punch 5 and the lower punch 6 is brought into a saturated state. Therefore, the powder can be compression-molded in a state where the change in the compression pressure when the upper and lower rolls 71 and 72 are pressed by the upper and lower rolls 71 and 72 is almost eliminated. In addition, since the rotating disk 3 and the upper punch and the lower punch 6 are heated, the upper roll and the lower rolls 71 and 72 are also heated, so that the change in the diameter of the upper roll 71 and the lower roll 72 is saturated. Become. Therefore, since the outer diameters of the upper roll 71 and the lower roll 72 are not affected by the temperature change, it is possible to further suppress the change in the compression pressure in combination with the extension of the length of the upper punch 5 and the lower punch 6. it can.

  Note that the present invention is not limited to the above embodiment.

  In the above-described embodiment, the medium is circulated in the turntable 3 in order to make the turntable 3 substantially constant temperature. It may be.

  Specifically, as shown in FIGS. 12 and 13, an air ejector 100 having a plurality of outlets 101 is arranged below the turntable 3, and at least the temperature of the turntable 3 is substantially constant at a set temperature. The air is temperature-controlled so as to blow out from each outlet. The air ejector 100 has a size that surrounds the outside of the lower punch 6, and is configured by forming a pair of semi-annular tubes 103 in an annular shape in an annular case 102 made of a heat insulating material having a channel structure. And is attached by a bracket 104 fixed to the frame 1. A gap is provided between the upper edge of the annular case 102 and the lower surface of the turntable 3 so as to prevent friction between the annular case 102 and the turntable 3. Each of the semi-annular tubes 103 has a structure in which air outlets 101 are provided at a predetermined pitch on the upper surface thereof, one end is closed, and air is introduced from the other end. And each semi-annular pipe 103 is arrange | positioned so that the closed end part may approach. By arranging the semi-annular tubes 103 in this way, the ends for introducing air can be brought together at close positions, and the piping from the air supply device 110 is facilitated.

  In this embodiment, in order to control the temperature of the air, an inlet temperature sensor 120 that measures the temperature of the air (inlet temperature) introduced into the air ejector 100 and the temperature of the turntable 3 are measured. Air is supplied to the air ejector by controlling the temperature of the air to be the set temperature based on the turntable temperature sensor 130 and output signals output from the inlet temperature sensor 120 and the turntable temperature sensor 130, respectively. An air supply device 110 is provided. The inlet temperature sensor 120 is attached to a connection portion of the air supply pipe 110a connected to each semi-annular pipe 103. On the other hand, the turntable temperature sensor 130 is attached near the side surface of the die 33 of the turntable 3. As shown in FIG. 14, the air supply device 110 measures a heater 111 for heating air, a blower 112 for outputting heated air at a predetermined pressure, and a flow rate of the output heated air. It comprises a flow meter 113 and an energization controller 114 for controlling the amount of energization of the heater 111. The energization controller 114 controls the amount of energization of the heater 111 based on the output signals of the inlet temperature sensor 120 and the turntable temperature sensor 130 so as to reduce the difference between the inlet temperature and the turntable temperature. The output of the blower 112 is controlled based on the output signal of the flow meter 113 so that the flow rate of the heated air becomes a predetermined flow rate. In the figure, reference numeral 140 denotes a power supply.

  In such a configuration, the air supply device 110 heats the air by the heater 111 and outputs the heated air (heated air) to the semi-annular tube 103 by the blower 112. The flow rate of the output heated air is monitored by the flow meter 113 to prevent the heated air from being supplied to the semi-annular tube 103 excessively. As described above, the temperature of the heated air is controlled by controlling the amount of electricity supplied to the heater 111 by the electricity supply controller 114. When the heated air is supplied to each of the semi-annular tubes 103, the heated air blows out from the respective outlets 101 of the semi-annular tubes 103 toward the lower surface of the turntable 3. The blown-out heated air collides with the turntable 3 to heat the turntable 3 and diffuses along the lower surface of the turntable 3 to heat the lower punch 6. While the heated air is being blown out, the temperature of the heated air and the temperature of the turntable supplied by the inlet temperature sensor 120 and the turntable temperature sensor 130 are detected, and the heating state is controlled in the air supply device 110. The turntable 3 and the lower punch 6 are kept in a substantially constant temperature state at a set temperature without being overheated.

  Therefore, when the temperature of the turntable becomes substantially constant, the mill 4 becomes substantially constant and the upper punch 5 and the lower punch 6 become substantially constant. As a result, similarly to the above embodiment, it is possible to suppress a change in the compression pressure during molding.

  In the above embodiment, the temperature control in the air supply device 110 of the other embodiments was not described, but the temperature of the medium, that is, the temperature of the hot water was measured in the connecting pipe C, and the temperature of the hot water was measured based on the measurement result. May be controlled. That is, in order to control the temperature of the medium, an inlet temperature sensor for measuring the temperature of the medium introduced into the introduction path I and an outlet temperature sensor for measuring the temperature of the medium discharged from the discharge path O are arranged. And a medium supply device that controls and outputs the temperature of the medium to a set temperature based on output signals respectively output from the inlet temperature sensor and the output temperature sensor. The medium supply device is a heater for heating water serving as a medium, a pump for outputting heated water at a predetermined pressure, and a medium for output medium. It may be composed of a flow meter for measuring the flow rate and an energization controller for controlling the amount of energization of the heater. The energization controller controls the amount of energization of the heater based on the respective output signals of the inlet temperature sensor and the outlet temperature sensor so that the difference between the inlet temperature and the outlet temperature becomes smaller.

  With such a configuration, the temperature of the medium can be easily adjusted. Therefore, the turntable 3, the dies 4, the upper punch 5, the lower punch 6, and the upper roll and the lower roll are heated, and they are quickly cooled. It can be maintained at a substantially constant temperature.

  Furthermore, the specific configuration, cross-sectional shape, and the like of each part are not limited to those in the illustrated example, and various modifications can be made without departing from the spirit of the present invention.

1 is a front sectional view showing an embodiment of the present invention. The perspective view of the meshing clutch in the embodiment. Sectional drawing of the connection pipe body in the same embodiment. The figure which shows the front, the plane, and the cross section of the connection bushing in the embodiment. Sectional drawing which expands and shows the rotating disk in the embodiment. FIG. 6 is an end view along the line VI-VI in FIG. 5. FIG. 7 is an end view along the line VII-VII in FIG. 5. FIG. 3 is a perspective view of the elevating body in the embodiment. FIG. 3 is a perspective view of a lifting mechanism according to the embodiment. FIG. 3 is a perspective view of a lifting shaft according to the embodiment. FIG. 3 is a plan view showing a state where the rotating body in the embodiment is removed. FIG. 10 is an exploded perspective view of an air ejector according to another embodiment of the present invention. Sectional drawing which shows the attachment state of the air ejector in the other embodiment. The block diagram which shows the structure of the air supply apparatus in the other embodiment.

Explanation of reference numerals

DESCRIPTION OF SYMBOLS 1 ... Frame 2 ... Standing shaft 3 ... Rotating disk 4 ... Die 5 ... Upper punch 6 ... Lower punch 71 ... Upper roll 72 ... Lower roll I ... Introduction path O ... Discharge path F ... Medium path 100 ... Air ejector 101 ... Outlet mouth

Claims (4)

In the frame, a rotary disk is horizontally rotatable via a vertical shaft, and is detachably disposed. A plurality of dies are provided on the rotary disk at a predetermined pitch, and an upper punch and a lower punch are provided above and below each mill. The upper and lower punches with the tip of the punch inserted into the die at least with the rotating plate held in a constant temperature state are passed between the upper roll and the lower roll so that the rotary disk is filled in the die. A rotary powder compression molding machine adapted to compression-mold the powder,
An introduction path for introducing a medium provided in the upright shaft so that at least the temperature of the turntable becomes substantially constant at a set temperature from the lower end side of the upright shaft to the turntable;
A medium passage provided in the turntable and communicating with the introduction path;
A rotary powder compression molding machine comprising: a discharge path provided inside the upright shaft for discharging the medium returned through the respective medium passages from the lower end of the upright shaft to the outside. The turntable includes a lower punch holding portion for holding the lower punch, a die portion to which a die is detachably attached, and an upper punch holding portion for holding the upper punch, and is related to the lower punch holding portion and the die portion. An annular distribution passage formed and connected to the introduction path, and an annular collecting passage connected to the discharge path are separately provided in the upper punch holding section, and one end of each of the medium paths is 2. The rotary powder compression molding machine according to claim 1, wherein the rotary powder compression molding machine is connected to the distribution passage and the other end is connected to the collecting passage. In the frame, a rotary disk is horizontally rotatable via a vertical shaft, and is detachably disposed. A plurality of dies are provided on the rotary disk at a predetermined pitch, and an upper punch and a lower punch are provided above and below each mill. The upper and lower punches with the tip of the punch inserted into the die at least with the rotating plate held in a constant temperature state are passed between the upper roll and the lower roll so that the rotary disk is filled in the die. A rotary powder compression molding machine adapted to compression-mold the powder,
An air ejector that has a plurality of outlets and is attached to the lower part of the turntable so as to blow air to the turntable from each outlet so that at least the temperature of the turntable becomes substantially constant at a set temperature. A rotary powder compression molding machine characterized by comprising: An inlet temperature sensor that measures the temperature of air introduced into the air ejector, a turntable temperature sensor that measures the temperature of the turntable, and air based on output signals output from the inlet temperature sensor and the turntable temperature sensor, respectively. 4. The rotary powder compression molding machine according to claim 3, further comprising: an air supply device for controlling the temperature of the air to a set temperature to supply air to the air ejector.

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