JPH04367398A - Rotary type powder compression molding machine - Google Patents

Abstract

PURPOSE:To allow the compression molding of powder raw materials under a high molding pressure with the rotary type powder compression molding machine by attachably and detachably mounting a rotary disk which is held mounted with upper pestles, lower pestles and mortars to a body frame. CONSTITUTION:A lower centering recessed part 24 having a circular truncated cone shape is provided on a driving haft 18 and a central pressurizing shaft 52 provided with an upper centering projecting part 59 having a circular truncated cone shape is mounted freely liftably to an upper frame 3 at the time of compressing and molding the powder raw materials within the mortars 78 of the rotary table 71 via the upper pestles 76 and the lower pestles 77. A sensor ring projecting part 87 and recessed part 82 to be respectively separately taper-fitted into the centering projecting part 59 and the centering recessed part 24 are provided in the upper and lower parts of the rotary disk 71 disposed between these parts. A lifting device 31 which rises the rotary table 71 to the height at which the taper fitting can be disengaged is mounted to the lower frame 2 of the device. This device is easily rotated together with the driving shaft 52 by the vertical movement of the rotary disk 71 or can be inserted and removed into and from between the upper and lower frames 3 and 2 while the upper pestles 76, the lower pestles 77 and the mortars 78 are held mounted. The compression molding is thus executed under the high molding pressure.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary powder compression molding machine for compressing powder material in a mortar of a rotary disk through an upper punch and a lower punch to form tablets and the like.

0002

[Prior Art] In a rotary powder compression molding machine, a rotary disk is made removable from the main body frame, and the rotary disk and various parts attached thereto, such as punches and mortars, can be cleaned outside the main body frame. The one that made the exchange possible was the JP-A-6
It is known from the publication No. 3-188496.

[0003] This publication discloses that a rotary disk that is installed and rotated on a rotary drive member provided on a main body frame is divided into three parts: an upper disk, an intermediate disk, and a lower disk. A meshing portion is formed to coaxially engage with the opposing contact surfaces of the plate and the rotational drive member, and a hole is provided in the center of each of the upper disk and the rotational drive member for inserting the insertion shaft and the support shaft, respectively. A rotary tablet manufacturing apparatus is described in which an insertion shaft and a support shaft are formed to be movable up and down with respect to the main body frame by respective independent lifting devices.

0004

However, in the device described in the above-mentioned publication, the rotary disk placed on the rotary drive member is vertically divided into three parts, so there are three mating parts. Therefore, when assembling the rotary disk to the main body frame, it is necessary to perform centering at each of the three locations. Furthermore, since the rotary drive member and the rotary disk are lifted up to be attached and detached, the positional relationship between the rotation drive member and the rotary disk does not change. Therefore, it is difficult to remove the lower disk from above the rotational drive member unless the lower punch, which is attached by inserting the lower part into the rotational drive member and passing the upper portion through the lower disk, is first removed.

As described above, the method described in the above publication requires the work of removing the lower punches one by one when removing the rotary disk, and the centering work when assembling the rotary disk is troublesome. Therefore, there was a problem in that the operability of attaching and detaching the rotary disk to and from the main body frame was not very good.

Furthermore, the support shaft that supports the upper part of the rotary disk is fixed to the upper frame, and therefore, the upper frame is moved up and down by a lifting motor. Since the upper frame moves in this manner, it is disadvantageous in supporting the reaction force of the molding pressure applied to the main frame during molding. Therefore, there is a problem that this method can only be used in compression molding of powder materials with low molding pressure.

SUMMARY OF THE INVENTION An object of the present invention is to provide a rotary powder compression molding machine that can improve the operability of attaching and detaching a rotary disk to a main body frame, and also enables compression molding at high molding pressure.

[0008]

[Means for Solving the Problems] In order to achieve the above object, the rotary powder compression molding machine of the present invention has a fixed lower frame and a fixed upper frame disposed above the lower frame. It is removably arranged between the main body frame and the upper and lower frames, has a fixed central axis at the upper part, is rotated around this central axis, and has a plurality of sets of upper and lower punches on the periphery. and a rotary disk to which the molar is removably attached, and which has driven teeth of a dog clutch on its lower surface, and drive teeth that mesh with the driven teeth of the dog clutch on its upper surface, and is attached to the lower frame. a rotary disk drive device having a rotatably supported drive shaft, which is attached to the main body frame and rotates the drive shaft; a lower centering convex portion protruding in the shape of a truncated cone on one side; and a truncated cone hole provided in the other of the lower surface of the center of the rotary disk or the upper surface of the center portion of the drive shaft; It has a lower centering recess that is relatively removably fitted into the side centering convex part, and a plurality of lifting shafts whose upper ends are brought into contact with and separated from the lower surface of the rotary disk, and is attached to the lower frame, and is attached to the lower frame. an upper presser comprising: a rotary plate elevating device that raises and lowers the rotary plate with an elevating stroke greater than the fitting depth between the side centering convex portion and the lower centering concave portion; a pressure roll device; a center pressure device having a center pressure shaft attached to the upper frame that can be raised and lowered; and one of a lower end of the center pressure shaft or an upper part of the fixed center shaft of the rotary disk; an upper centering convex portion protruding in the shape of a truncated cone; and a truncated cone hole provided in the other of the lower end of the central pressure shaft or the upper part of the fixed central shaft of the rotary disk; The lower centering concave portion is removably fitted into the lower centering convex portion.

Further, in order to further stabilize the rotary disk mounted between the upper and lower frames, a vertically movable receiving shaft having the lower centering recess or the lower centering convex formed in the upper part is attached to the drive shaft. In addition to being located in the center of
A pressure receiving means that is disposed to support the receiving shaft from below and is elastically deformed in response to the pressurizing force from the center pressurizing shaft is built into the drive shaft, and the lower centering convex portion of the rotary disk or A ring-shaped seat that abuts the lower surface of the lower centering recess may be provided around the receiving shaft and on the upper surface of the drive shaft.

0010

[Operation] In the rotary powder compression molding machine of the present invention, in order to remove the rotary disk, first operate the center pressure device and the upper pressure roll device, then press the center pressure shaft and the upper pressure roller. Increase the required amount of each. Next, the rotary disk lifting device is operated to raise its lifting shaft, thereby raising the entire rotary disk with the upper punch, lower punch, mortar, etc. attached. After that, for example, the fork of a forklift is inserted into the main body frame and placed in a position where it can be hooked onto the rotary disk, and then the entire rotary disk is supported on the fork by lowering the elevating shaft. Finally, move the forklift and pull out the entire turntable from inside the main body frame.

Furthermore, in order to install the rotary disk, the entire rotary disk with the upper punch, lower punch, mortar, etc. attached is placed on the fork of a forklift, and the forklift is moved to insert the rotary disk into the center of the main body frame. do. Next, the elevating shaft is raised to support the rotary disk, the rotary disk is lifted to a position above the fork, and the fork is pulled out of the main body frame. After that, the lifting shaft, central pressure shaft, and upper pressure roller are lowered, and the lowering operation is temporarily stopped at the position just before the driving teeth and driven teeth of the dog clutch engage, and then Lower the center pressure shaft further. Then, the centering recess and convex part on the upper side of the central pressurizing shaft and the fixed central shaft of the rotary disk are tapered fitted,
Thereby, the rotary disk is automatically centered with respect to the central pressurizing shaft.

[0012] Thereafter, the driving shaft is manually rotated as necessary to align the driving teeth and the driven teeth, and then the elevating shaft, the central pressure shaft, and the upper pressure roller are moved to their respective lower limit positions. lower it. Then, the lower centering recess and convex portion of the rotary disk and the drive shaft taper-fit, thereby automatically centering the rotary disk with respect to the drive shaft, and also engages the dog clutch. ,
Due to the pressing force of the center pressurizing shaft, the rotary disk is held between this shaft and the drive shaft under a predetermined pressure, and the rotary disk is connected and held to both shafts. This completes the installation of the turntable.

When the rotary disk drive device is operated with the rotary disk installed, the driving force is transmitted from the drive shaft to the rotary disk via the dog clutch, and the rotary disk is centered around its fixed central axis. It is rotated as Thereby, a predetermined powder compression molding operation is carried out. The reaction force of the molding pressure during this molding operation is supported by the fixed upper and lower frames of the main body frame, respectively.

In addition, in a structure in which the drive shaft has a receiving shaft supported by a pressure receiving means, after the lower centering recess and convex part of the rotary disk and the drive shaft are tapered-fitted, the central pressure is applied. Since the pressure receiving means is elastically deformed in response to the pressing force of the shaft, the receiving shaft is slightly pushed down while the tapered fit is maintained. Thereby, the lower surface of the rotary disk can be brought into contact with the ring-shaped seat provided on the drive shaft. In this way, since the lower centering recess and the convex part can achieve both taper fitting and contact between the rotary disk and the seat, whirling and surface wobbling of the rotary disk can be prevented.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 1 to 16. Reference numeral 1 in FIGS. 1, 2, and 12 indicates a main body frame, which includes a fixed lower frame 2 and a fixed upper frame 3 disposed above this frame 2. Both the upper and lower frames 2 and 3 have a rectangular shape in plan view, and as shown in FIG. 12, are connected to each other via support columns 4 provided at three corners thereof.

In FIG. 12, reference numeral 5 indicates a support column cover, and reference numeral 6 indicates an auxiliary support column located at one remaining corner and removably provided between the upper and lower frames 2 and 3. The auxiliary column 6 is fixed to the lower frame 2 by a bolt 7 passing through a groove in the column end plate 6a that overlaps the upper surface of the lower frame 2.
It has also been fixed. In addition, 8 in FIGS. 1 and 2 is a see-through door that is detachably attached to each side of the main body frame 1, and 9 is a receiver for the see-through door 8, etc., which is also detachably attached to the main body frame 1. There is.

A rotary disk drive device 11 is attached to the lower frame 1. As shown in FIGS. 1 and 2, this device 11 includes a drive motor 12 and a brake with a clutch 13.
, a chain transmission mechanism 14 that connects the drive motor 12 and the brake with clutch 13, a reduction gear 15, a chain transmission mechanism 16 that connects the brake with clutch 13 and the reduction gear 15, and an upward direction of the reduction gear 15. Shaft coupling 1 is attached to the output shaft 15a of
The drive shaft 18 is connected via a drive shaft 7.

The drive shaft 18 passes through a support cylinder 19 attached to the ceiling wall of the lower frame 2, and is rotatably supported by the cylinder 19 via a bearing 20 (see FIG. 3). For convenience of explanation, FIG. 3 depicts the state in which the rotary disk 71 is raised to the attachment/detachment position on the right side of the center line in the figure, and the state in which the rotary disk 71 is lowered and installed on the left side. This is an explanatory diagram, and various parts attached to the rotary disk 71 are omitted. The drive shaft 18 is connected to the rotary disk drive device 1
It can be rotated manually by operating a hand-crank handle (not shown) connected to 1.

A mounting hole 21 whose top surface is open is formed in the center of the drive shaft 18. A receiving shaft 22 is fitted and attached to the hole 21 so as to be movable up and down, and a pressure receiving spring 23 serving as pressure receiving means for supporting the receiving shaft 22 from below is accommodated.

The upper end of the receiving shaft 22 projects slightly beyond the upper surface of the drive shaft 18, and a lower centering recess 24 whose upper surface is open is formed in the upper portion of the receiving shaft 22. This centering recess 24 is formed in the shape of a truncated conical hole.

As shown in FIG. 3, the pressure receiving spring 23 is formed by assembling a plurality of disc springs in opposite directions, and providing disks above and below the disc spring group. The spring force of the pressure receiving spring 23 is determined to be such that it does not elastically deform even when receiving the weight of a rotary disk 71, which will be described later, and is elastically deformed when receiving the weight and the pressurizing force from the central pressurizing shaft 52, which will be described later. It is being

A ring-shaped clutch plate 25 (see FIG. 6) is fixed concentrically to the receiving shaft 22 on the upper surface of the drive shaft 18. A large number of upward drive teeth 26 are integrally formed on the upper surface of this plate 25 at predetermined intervals. On the upper surface of the clutch plate 25, a ring-shaped seat 27 is located inside the drive tooth 26, in other words, located between the lower centering recess 24 and the drive tooth 26, and is concentric therewith. is fixed. As shown in FIG. 3, the inner peripheral edge of the catch seat 27 is engaged with the upper end of the receiving shaft 22 to prevent the receiving shaft 22 from coming off upward. The upper end surfaces of this catch seat 27 and the receiving shaft 22 are substantially flush with each other.

[0023] The lower frame 2 is provided with a rotary plate lifting device 3.
1 is installed. As shown in FIGS. 1, 2, 9, and 10, this device 31 has three lifting shafts 32 arranged at approximately 120° intervals and extending vertically, and synchronizes these. The first
- third worm gear mechanisms 33-35. Each of the worm gear mechanisms 33 to 35 is mounted on the lower surface of the ceiling wall of the lower frame 2, and a male screw portion 32a formed at the bottom of the lifting shaft 32 is passed through a screw hole 36 formed at the center of the worm wheel. They are screwed together.

As shown in FIG. 9, the first worm gear mechanism 3
The third and third worm gear mechanisms 35 are arranged with their worm shafts 37 and 38 parallel to each other, and the second worm gear mechanism 34 is arranged with its worm shaft 39 perpendicular to the worm shafts 37 and 38. It is arranged in the direction of One end of the worm shaft 39 and the worm shaft 37
is connected to the tip of the worm shaft 39 via a first bevel gear mechanism 40, and the other end of the worm shaft 39 and the tip of the worm shaft 38 are connected via a second bevel gear mechanism 41. The worm shaft 37 and the clutch-equipped brake 13 are connected via a chain transmission mechanism 42, and 42a in FIG. 9 indicates a driven chain wheel of the chain transmission mechanism 42 (see FIGS. 1 and 2).

The lifting shaft 32 passes through the support cylinder 19 as a guide, and has a groove 43 extending in the axial direction formed in its upper part. This groove 43
The engaging member 4 is fixed to the upper end of the support cylinder 19.
4 is fitted, thereby preventing the lifting shaft 32 from rotating.

Therefore, when the driving force is transmitted from the chain transmission mechanism 42, the first to third worm gear mechanisms 33
~ 35 are operated synchronously, and the screw hole 36 of the worm wheel and the male threaded portion 32a of the lifting shaft 32 are prevented from rotating.
Since the screwing state changes, each lifting shaft 32 is raised and lowered in synchronization.

A center pressurizing device 51 is attached to the upper frame 3, as shown in FIGS. 1 and 2. This device 51 includes a central pressurizing shaft 52 that shares an axis on an axial extension of the drive shaft 18 and is movable up and down, and a drive mechanism 53 equipped with a torque limiter that raises and lowers this shaft 52. There is.

The center pressurizing shaft 52 is guided so as to be movable up and down while being prevented from rotating by a sleeve 54 attached to the downwardly protruding portion 3a of the upper frame 3, and reference numeral 55 is a key for preventing rotation;
is a keyway. The drive mechanism 53 includes a worm gear mechanism 57, a motor 58 that rotates a worm shaft of the mechanism 57, and a deceleration transmission mechanism (not shown). A central pressing shaft 52 passes through the center of the worm wheel of the worm gear mechanism 57, and these shafts are screwed together. Therefore, as the motor 58 is rotated in the forward and reverse directions, the screwing state between the detented central pressure shaft 52 and the worm gear mechanism section 57 changes.
The central pressure shaft 52 is raised and lowered. An upper centering convex portion 59 is formed at the lower end of the center pressurizing shaft 52 and has a truncated cone shape and projects downward. In addition, 60 in the figure is a cover.

An upper pressure roll device 61 is attached to the upper frame 3, as shown in FIGS. 1 and 2. This device 61 includes an upper pressure roll 62 that is arranged to be movable up and down, and a drive mechanism 63 that moves the roll 62 up and down. A roll holder 64 supporting the upper pressure roll 62 is guided so as to be movable up and down while being prevented from rotating by the downward protrusion 3a. In the figure, 65 is a key for preventing rotation, and 66 is a keyway. The drive mechanism 63 includes a worm gear mechanism 67, a motor 68 that rotates a worm shaft of the mechanism 66, and a deceleration transmission mechanism (not shown). A male screw shaft 69 fixed to the roll holder 64 passes through the center of the worm wheel of the worm gear mechanism section 67, and these screws are screwed together. Therefore, when the motor 68 is rotated forward and backward, the male threaded shaft 69 of the roll holder 64 is prevented from rotating.
Since the screwing state between the upper pressure roll 62 and the worm gear mechanism 67 changes, the upper pressure roll 62 is moved up and down. Note that this upper pressure roll device 61 is configured for upper pressure rolls for preload and main pressure, respectively.

A rotary disk 71 is removably disposed within the main body frame 1 between the upper and lower frames 3 and 2. As shown in FIG. The rotary disk 71 has a fixed central shaft 72 at its upper portion, and a rotating portion that rotates around the central shaft 72. The rotating part includes an upper rotating part 73 having an upper punch attaching collar part 73a on the circumference, a mortar attaching collar part 74a on the upper part of the circumferential part, and a lower punch attaching collar part 74 below this.
A lower rotating portion 74 having a diameter b. The upper and lower rotating parts 73 and 74 are connected to each other, and these are supported by a bearing 75.
It is configured to rotate around a fixed central shaft 72 via the.

[0031] Upper punches 76 are attached to the upper punch attachment collar portion 73a so as to be movable up and down at regular intervals along its circumferential direction. Similarly, lower punches 77 are attached to the lower punch attachment collar portion 74b so as to be movable up and down at regular intervals along its circumferential direction. Furthermore, dies 78 are attached to the die attachment flange 74a at regular intervals along its circumferential direction. The tip of the lower punch 77 is inserted into the mortar 78 to form the bottom of the mortar 78, and the tip of the upper punch 76 is inserted into and removed from the mortar 78, and the upper and lower punches 76, 77 move up and down to open the mortar. Compression molding of the powder material is provided within 78 .

In this embodiment, an upper punch guide track 81 is integrally provided on the upper peripheral surface of the fixed central shaft 72. A roll attached to the upper punch 77 rolls into contact with the track portion of the track 81, thereby causing the upper punch 77 to move up and down.

An upper centering recess 82 having a conical hole shape is formed in the upper part of the fixed central shaft 72, and the upper centering protrusion 59 is removably tapered fitted into the recess 82.

A clutch plate 85 is fixed to the lower surface of the rotary disk 71. A large number of driven teeth 86 are integrally formed on this plate 85 at predetermined intervals, projecting downward and meshing with the driving teeth 26 . Both teeth 26
, 86 and their plates 25, 85 form a so-called dog clutch. Furthermore, a lower centering convex portion 87 is integrally provided at the center of the clutch plate 85 . The convex portion 87 is shaped like a truncated cone, and is tapered and removably fitted into the lower centering recess 24 . Further, a ring-shaped flat surface 88 between the group of driven teeth 86 and the lower centering convex portion 87 of the clutch plate 85 is configured to be removably placed on the upper surface of the seat 27.

Various parts are disposed on the lower frame 2 and are located around the support cylinder 19 to move the lower punch 77 up and down. The arrangement state is shown in FIG. 6, in which 91 is a lower punch lowering track, 92 is a weight adjustment track, and 9 is a lower punch lowering track.
3 is a lower pressure roll for preloading, 94 is a roll front track, 9
5 is a lower pressure roll for main pressure, 96 is a push-up track, 97
98 is a horizontal trajectory. In addition, Figure 7
99 in FIG. 8 is an auxiliary track for inserting the lowering device, which is fixed to the support cylinder 18.

Among the parts, the lower punch lowering track 91 is the lower punch 7.
7 has a roll 77a, this roll 77a
It consists of a grooved cam that guides the Therefore, as shown in FIGS. 7 and 8, the trajectory 91 is
The upper surface of the track 91 is normally held in a fixed position by tightening the clamp 102, so that the track 91 is held in place during the movement trajectory of the roll 77a.
cam grooves 91a are arranged. Therefore, by loosening the clamp 102 and moving the track 91 to the position indicated by the two-dot chain line in FIGS.
7a and the cam groove 91a of the raceway 91 are disengaged from each other.

Moreover, the reversing base 101 is rotatably attached to the support cylinder 19 about a pivot 103, and is normally fixed in the horizontal state as shown by the solid line in FIG. 8 by tightening the clamp 104. held in position. Therefore, after the track 91 is pulled out as shown by the two-dot chain line in FIG. is retracted to a position that does not affect the vertical movement and insertion/removal of the rotary disk 71.

[0038] Also, the downward protrusion 3 of the upper frame 3
As shown in FIGS. 11 and 12, an upper punch safety lowering track 112 is rotatably attached to the upper punch a via a pivot 111. This track 112 is such that the upper punch 76 is connected to the upper punch guide track 81.
This is a track that suppresses jumping when descending on the descending track portion of the vehicle, and is normally fixed to the side surface of the downward projecting portion 3a by a removable screw 113. Therefore, if the fixation by the screw 113 is released, the track 112 will be fixed as shown in FIG.
The rotary disk 71 is rotated and displaced as shown in the two-dot chain line in 2.
It is designed to be retracted to a position that does not affect the vertical movement and insertion/removal of the

At least one rotary powder compression molding machine having the above structure is installed, for example, in the air-conditioned molding chamber 122 shown in FIG. 13. Note that Fig. 13 shows the case where two molding machines are installed, and it is necessary to distinguish between these molding machines.
A subscript a or b is added to the part number 121 representing the part number and displayed. Moreover, 122a in the figure is an entrance/exit door. Each of these compression molding machines 121a and 121b includes an aligning machine 12 that receives, aligns, and stores the molded products.
3 are provided adjacent to each other. The molding machine 121a, 1
21b are lined up in the left-right direction in FIG. 13, and a cleaning stand 124 and a temporary stand 125 are installed in the line-up direction.

In front of these molding machines 121a and 121b, the cleaning table 124, and the temporary storage table 125, a rotary disk movement path B consisting of, for example, a straight path is set, and in this movement path B, there is a A forklift 127, which serves as a rotary disk loading/unloading device and is on standby, is moved back and forth. In addition, this forklift 127
is operated manually. And the compression molding machine 12
1a and 121b are arranged side by side with their removable auxiliary columns 6 facing the rotary disk movement path B.

The cleaning table 124 shown in FIG. 16 is for automatically cleaning the rotary disk 71 taken out from the molding machines 121a and 121b, and has a cleaning chamber 132 in the upper part of the table main body 131. A drive device 133 is attached to the lower part of the stand main body 131. The cleaning chamber 132 has a closed structure, and includes an opening/closing door 149 pivotally attached to the front surface of the cleaning chamber 132 by a hinge 148 so that the inside of the cleaning chamber 132 can be seen through.

A bearing support 134 is attached to the center of the bottom wall of the cleaning chamber 132, and a rotary shaft 136 is rotatably supported on the support 134 via a bearing 135. A lower end of the rotating shaft 136 is connected to an output shaft 133a of the drive device 133 via a shaft joint 137. The upper end of the rotating shaft 136 is located in the cleaning chamber 132 and is mounted on a cradle 138.
is supported. The pedestal 138 has a truncated conical hole 13 into which the lower centering convex portion 87 is removably tapered fitted.
8a and a receiving surface 138b that engages with the ring-shaped flat surface 88.

A lower punch guide track 139 is attached to the bottom wall of the cleaning chamber 132 so as to be located around the pedestal 138. This track 139 is connected to a rotary disk 71 supported on a pedestal 138.
It is provided to move the lower punch 77 up and down. A cylinder 140 is vertically attached to the outer surface of the center of the upper wall of the cleaning chamber 132, and a presser body 141 rotatable around this axis is attached to the lower end of a piston shaft 140a that is inserted into the cleaning chamber 132 and moves up and down. It is being The presser body 141 is tapered and removably fitted into the upper centering recess 82 and has a truncated conical shape.

A jet pipe 143 is installed vertically in the cleaning chamber 132, passing through its upper wall, for example. A plurality of injection nozzles 144 are attached to spray liquid and air at high pressure toward the target. Ejection pipe 143
A cleaning liquid or hot air is introduced to the cleaning liquid or hot air through a switching device 145, and the table main body 131 is equipped with a supply section (not shown) for supplying the cleaning liquid and hot air. In FIG. 13, 146 is a waste liquid tank, and 147 is a drain pipe that leads the waste liquid in the cleaning chamber 132 to the waste liquid tank 146. The washing table 124 having the above configuration is installed with its opening/closing door 149 facing the rotary disk movement path B.

The temporary stand 125 shown in FIGS. 14 and 15 is for supporting the rotary disk 71 taken out from the molding machines 121a and 121b or the rotary disk 71 cleaned on the washing table 124. be. This base 125 is the base 1
It has a box shape with a sealed temporary storage chamber 152 having a bottom 51, and is provided with an opening/closing door 154 pivotally attached to the front surface of the temporary storage chamber 152 by a hinge 153 so that the inside of the temporary storage chamber 152 can be seen through. A cradle 1 is attached to the center of the bottom wall of the temporary storage chamber 152 via a thrust bearing 155 and a radial bearing 156.
57 is rotatably attached.

[0046] The pedestal 15 located in the temporary storage chamber 152
7 has a truncated conical hole 157a into which the lower centering convex portion 87 is removably fitted with a taper, and a receiving surface 157 that engages with the ring-shaped flat surface 88.
It has b. The downward shaft portion 157c of the pedestal 157 is inserted into the base 151, and a gear 158 is attached to the lower end thereof. A final gear of an operating mechanism (not shown) is meshed with this gear, and an operating section (hand crank, etc.) of the operating mechanism is arranged outside the base 151. This temporary storage stand 125 is installed with its opening/closing door 154 facing the rotary disk movement path B.

FIG. 2 shows the set state of the rotary disk 71 of the rotary powder compression molding machine equipped with the rotary disk batch replacement and cleaning system having the above structure. In this state, when the rotary disk drive device 31 is operated to rotate the drive shaft 18, the rotation is transmitted to the rotary disk 71 through the engagement between the driving teeth 26 and the driven teeth 86 of the dog clutch. Drive shaft 1
8 and a rotating portion of the rotary disk 71 are rotated about a fixed central axis 72.

[0048] Therefore, as the rotary disk 71 rotates, the upper punch 76 and the lower punch 77 are moved up and down, respectively, and while the mortar 78 of the rotary disk 71 rotates once, the upper punch 76 and the lower punch 77 are moved up and down, and while the mortar 78 of the rotary disk 71 rotates once, the upper punch 76 and the lower punch 77 are installed on the upper surface of the mortar mounting collar 74a. The powder taken into the mortar 78 from a powder feeder (not shown) is measured, pre-compressed and main compressed, and the molded product is finally extruded from the mortar 78.

By the way, the reaction force of the molding pressure during molding as described above is supported by the upper and lower frames 3 and 2 of the main body frame 1, but these are fixedly provided and the rotary disk 71
Since it is not moved for attachment and detachment, which will be described later, it can receive a large reaction force. Therefore, it is suitable for molding powder materials with not only low molding pressure but also high molding pressure.

Next, a procedure for removing the rotary disk 71 for external setup when changing the type of powder to be molded or changing the size and shape of a molded product will be explained. first,
The transparent window 8 and the receiver 9 are each removed from the main case 1, and the auxiliary support column 6 is also removed from the main case 1. In this state, parts such as the powder feeder located above the rotary disk 71 are moved so as not to interfere with the upward movement of the rotary disk 71, and this is confirmed by a sensor.

Next, the lower punch lowering track 91 and the upper punch safety lowering track 112, which are obstacles to the upward movement of the rotary disk 71, are respectively retracted to positions where they do not affect the upward movement of the rotary disk 71. The procedure is as already explained, and the lower pestle lowering trajectory 91 is shown in FIG.
At the position indicated by the middle two-dot chain line, there is also the upper punch safety descent trajectory 112.
are arranged at the positions indicated by the two-dot chain lines in FIG. Note that these evacuations are confirmed by a sensor (not shown).

[0052] After that, the central pressurizing device 51 is operated,
The center pressurizing shaft 52 is raised to a predetermined height position. As a result, the upper centering convex portion 59 of the center pressurizing shaft 52 comes out of the upper centering concave portion 82 of the rotary disk 71 .

Further, later than this operation, the upper pressure roll device 61 for preload and main pressure is operated to raise the upper pressure roll 62, and the rotary plate lifting device 31 is operated to raise and lower the upper pressure roll 62. Raise the shaft 32. Then, the three lifting shafts 32 come into contact with the lower surface of the periphery of the clutch plate 85 of the rotary disk 71, and the upper punch 76, the lower punch 77,
Then, the turntable 71 with the mortar 78 attached thereto is lifted up to a predetermined height.

By this lifting, the lower centering convex portion 87 of the rotary disk 71 is pulled upward from the lower centering recess 24 of the drive shaft 18, and the dog clutch is disengaged. At this time, the rotary disk 71 is raised with a stroke greater than the depth of engagement between the lower centering convex portion 87 and the lower centering recess 24 . Further, the upper pressure roll 62 is raised to the upper limit position. Note that the above state is shown in FIG.

Next, fork A of the forklift 127
(See FIG. 1), for example, at a position immediately below the mortar attachment collar 74a, and then operate the center pressurizing device 51 again.
The center pressurizing shaft 52 is raised to the upper limit position, and the upper centering convex portion 59 is held at a height position that does not interfere with the drawing out of the rotary disk 71. At the same time, the rotating disk lifting device 31 is operated to lower the lifting shaft 32 a little and then stopped. As a result, the rotary disk 71 is placed on the fork A, and the elevating shaft 32 is released below the rotary disk 71.

Finally, the forklift 127 is moved backward, and the rotary disk 71 is pulled out together with the fork A from between the upper and lower frames 3 and 2. The drawing direction is shown in Figure 12.
It is shown in the direction of middle arrows E and F.

[0057] Also, the procedure for attaching the rotary disk 71 that has been removed as described above will be explained.

First, the rotary disk 71 (this includes other rotary disks 71 of the same structure that were set up outside during the molding operation) whose cleaning or punch set replacement has been completed is loaded onto the forklift 1.
27 and inserted between the upper and lower frames 3 and 2 of the main body frame 1. The insertion position at this time is roughly determined by visual measurement so that the upper and lower centering protrusions 59, 87 and the recesses 82, 24 are substantially opposed to each other.

Next, the elevating shaft 32 of the rotary plate elevating device 31 is raised and stopped when it reaches a predetermined height position.
The rotary disk 71 is separated from the fork A and supported by the elevating shaft 32. In this state, the fork A is pulled out of the main body case 1.

In this state, the elevating shaft 32 of the rotary plate elevating device 31 is lowered, and the center pressure shaft 52 of the center pressure device 51 and the upper pressure roll 62 of the upper pressure roll device 61 are lowered, respectively. It is operated. These downward movements are temporarily stopped just before the dog clutch engages.

Next, the center pressurizing shaft 52 of the center pressurizing device 51
is moved downward, so that the upper centering protrusion 59 of this shaft 52 contacts the upper centering recess 8 of the rotary disk 71.
2 with a taper fit. The lowering operation of the central pressurizing shaft 52 is continued until the torque limiter of the central pressurizing device 51 is activated. Then, due to the taper fitting, the center pressure shaft 52
The rotary disk 71 is automatically centered relative to the center.

In such a centering state, the relative position between the driving tooth 26 and the driven tooth 86 of the dog clutch is visually confirmed, and if there is any misalignment, it can be corrected to the normal position by turning a manual handle (not shown). Arrange for a relationship.

After that, the elevating shaft 32 of the rotary plate elevating device 31 is lowered again, and the center pressure shaft 52 of the center pressure device 51 and the upper pressure roller 62 of the upper pressure roller device 61 are lowered, respectively. These lowering positions are stopped when the lower limit positions are reached. Ru. At this time, the center pressurizing device 51 is operated with a slight delay, and its lower limit position is determined by the operation of a torque limiter.

Therefore, as described above, the rotary disk 71
is lowered, the dog clutch is engaged, and the lower centering protrusion 87 of the rotary disk 71 taper-fits into the lower centering recess 24 of the drive shaft 18 . By this taper fitting, the rotary disk 71 is automatically centered with respect to the drive shaft 18, and the rotary disk 71 is automatically centered with respect to the drive shaft 18.
1 is held between the drive shaft 18 and the central pressure shaft 52 with a predetermined pressure. Further, the ring-shaped flat surface 88 of the rotary disk 71 is placed on the seat 27 of the drive shaft 18 .

In this case, since the drive shaft 18 has a receiving shaft 22 supported by a pressure receiving spring 23, and a lower centering recess 24 is formed in this receiving shaft 22, first, the lower centering recess 24 and the lower The side centering convex portion 87 is tapered fitted, and the pressure receiving spring 23 is elastically deformed under the pressure of the central pressure shaft 52 . Thereby, the drive shaft 18
It is possible to realize centering of the rotary disk 71 relative to the center.

Then, the receiving shaft 22 is pushed down a little while the tapered fitting is maintained due to the elastic deformation of the receiving pressure spring 23, so that the ring-shaped flat surface 88 of the rotary disk 71 and the ring-shaped receiving seat 27 are pushed down. It can be brought into contact.

By realizing such a tapered fit between the lower centering recess 24 and the lower centering protrusion 87, the rotating disk 71 is prevented from whirling around, and the flat surface 88 of the rotating disk 71 and the receiving seat are prevented. By realizing contact with 27, surface runout of the rotary disk 71 is prevented. Therefore, the turntable 7
Even when the diameter of the rotary disk 71 is large, the rotary disk 71 can be stably mounted, and the accuracy of the compression molded product can be improved.

Note that the flat surface 88 of the rotary disk 71 and the catch seat 27
If contact is made first, the taper fit between the lower centering recess 24 and the lower centering protrusion 87 will not be possible, and it is technically difficult to achieve simultaneous contact at both positions. Therefore, it is not desirable in any case.

[0069] After installing the rotary disk 71 as described above,
The parts that were evacuated earlier are returned to their original positions, thereby completing the entire work.

When attaching and detaching the rotary disk 71 as described above, it is possible to carry out the attachment and detachment with the upper punch 76, lower punch 77, mortar 78, and upper punch guide track 81 attached, and not only can the rotary disk 71 be inserted and removed at once, but also the drive Shaft 18 and central pressure shaft 5
Since the centering for 2 is automatically done, the rotary disk 71
can be easily attached and detached.

Then, with the upper punch 76, lower punch 77, mortar 78, and upper punch guide track 81 still attached as described above, the rotary disk 71 is moved all together by the fork lift 127 between the upper and lower frames 3 and 2. Since the rotary powder compression molding machines 121a and 121b, the washing table 124, and the temporary storage table 125 are arranged side by side, the rotary plate 71 that has been removed via the forklift 127 can be inserted and removed from the The forklift 127 can be used to store the other rotary disk 71 in the washing table 124, and the other rotary disk 71, which has been cleaned and is waiting in the temporary storage table 125, can be stored in the cleaning table 124 by the forklift 127, and the other rotary disk 71, which has been cleaned and is waiting in the temporary storage table 125, can be stored in the cleaning table 124, and the other rotary disk 71, which has been cleaned and is waiting in the temporary storage table 125, can be stored in the rotating table from which the rotary disk 71 has been removed by the above-mentioned operation. type powder compression molding machine 121a or 121b
It can be set inside. Note that symbols F, C, and D in FIG. 13 indicate rotary powder compression molding machines 121a and 121a, respectively.
121b, the cleaning table 124, and the temporary storage table 125 show the locus of movement of the fork A for taking the rotary disk 71 in and out.

Therefore, the rotary powder compression molding machine 121
In addition to a and 121b, a rotary disk prepared in advance (of course, upper and lower punches 76, 77, a mortar 78, etc. are set) is provided, and this rotary disk and the rotary powder compression molding machine 121a
, 121b is moved by a hook lift and inserted between the upper and lower frames 3 and 2 of the rotary powder compression molding machines 121a and 121b, inside the washing stand 124, and inside the temporary stand 125, respectively. According to the removable rotary disk batch replacement cleaning system, the time during which the rotary powder compression molding machines 121a and 121b are forced to stop for cleaning or mold replacement can be shortened, and the operating rate of the molding machines can be improved. .

Cleaning around the rotary disk when changing the type of powder is performed using the rotary powder compression molding machine 121a or 12.
The rotary disk 71 taken out from 1b is stored in the cleaning chamber 132 of the cleaning table 124. That is, by lowering the rotary disk 71 after inserting it into the cleaning chamber 132 by the forklift 127, the lower centering convex portion 87 of the rotary disk 71 is tapered fitted into the conical hole 138a of the pedestal 138, and at the same time, the ring shaped flat surface 88 cradle 1
It can be placed on the receiving surface 138b of 38. After that, the piston shaft 140a of the cylinder 140 is lowered and the presser body 142 is tapered fitted into the upper centering recess 82 of the rotary disk 71, thereby removing the cleaning chamber 130.
A rotary disk 71 is housed and set inside.

Then, with the opening/closing door 149 closed, the drive device 133 is operated to rotate the rotary disk 71 together with the pedestal 138, and then the cleaning liquid is introduced into the jet pipe 143, and this liquid is sent to the jet nozzle 144. The rotary disk 71 is cleaned by spraying the rotary disk 71 at high pressure. In that case, as the rotary disk 71 rotates, the upper punch 76 is of course moved up and down by the upper punch guide track 81, but the lower punch 77 also slides on the lower punch guide track 139 in the cleaning chamber 132. Since they move up and down, the upper and lower punches 76 and 77 can also be automatically cleaned at the same time by high-pressure water. After this cleaning, hot air is guided to the jet pipe 143 and supplied to the cleaning chamber 132, so that the cleaned rotary disk 71 and the like are dried by the hot air.

The rotary disk 71 that has been cleaned and dried in the above manner is transported from the cleaning room 132 to the forklift 127.
is taken out and stored in the temporary storage chamber 152 of the adjacent temporary storage table 125. That is, the cleaned rotary disk 71
is inserted into the temporary storage chamber 152 by the forklift 127 and then lowered to taper-fit the lower centering convex portion 87 of the rotary disk 71 into the conical hole 157a of the pedestal 157, and at the same time, the ring-shaped flat surface 88 is lowered. Place it on the receiving surface 157b of the receiving stand 157 and place it in the temporary storage chamber 152.
The rotary disk 71 is housed and set inside.

[0076] In addition, when it is necessary to change the mold to change the dimensions and shape of the molded product, this temporary storage chamber 15 is used.
2, the upper and lower punches 76, 77 and the die 78 are replaced manually through the front opening. At that time, the rotating disk 71 can be rotated by turning the hand handle of the operating mechanism (not shown), so that the cradle 157 can be rotated.
At the same time, a rotary disk 71 supported by the rotating disk 71 is rotated.

Note that the present invention is not limited to the above embodiment. For example, if the rotary disk has a small diameter, the catch may be omitted. Further, since the positional relationship between the upper and lower centering convex portions and the concave portions is relative, the centering convex portions and the concave portions on the upper side and the lower side may be provided in a reverse manner.

[0078]

Effects of the Invention In the rotary powder compression molding machine of the present invention as described above, not only can the rotary disk be inserted and removed at once with the upper punch, lower punch, and mortar attached, but also the drive shaft and central press shaft Since the centering can be done automatically, it is possible to improve the operability of attaching and detaching the rotary disk, and because the upper frame that receives molding pressure during molding is equipped with a central pressurizing device that has a central pressurizing shaft that can move up and down, There is no need to move the upper frame to remove the turntable, and therefore
Also suitable for compression molding with high molding pressure.

Furthermore, in a configuration in which the drive shaft has a pressure receiving means, it is possible to ensure the centering of the rotary disk while bringing the ring-shaped catch into contact with the lower surface of the rotary disk, thereby realizing surface contact of the rotary disk. This makes the rotary disk more stable and can be installed between the upper and lower frames.

[Brief explanation of drawings]

FIG. 1 is a schematic vertical sectional view of a rotary powder compression molding machine showing a state in which a rotary disk is pushed up according to an embodiment of the present invention.

FIG. 2 is a schematic vertical sectional view of the rotary powder compression molding machine according to the same embodiment, showing a state in which a rotary disk is set.

FIG. 3 is an enlarged cross-sectional view of a part of the rotary powder compression molding machine according to the same embodiment, and is a diagram for comparing and explaining the vertical movement of the rotary disk.

FIG. 4 is a side view of a rotary disk according to the same embodiment.

FIG. 5 is a bottom view of the rotary disk according to the same embodiment.

FIG. 6 is a plan view showing the area around the drive unit of the rotary disk according to the same embodiment.

[Fig. 7] Regarding the same example, the lower punch lowering orbit is shown at Z- in Fig. 8.
A sectional view taken along the Z line.

[Fig. 8] Regarding the same example, the lower punch lowering orbit is shown in Fig.
A sectional view taken along the Y line.

FIG. 9 is a partially sectional plan view showing the rotary disk lifting device according to the same embodiment.

10 is a sectional view taken along the line X-X in FIG. 9 of the same embodiment.

FIG. 11 is a side view showing the upper punch safe descent orbit in the same embodiment.

12 is a schematic cross-sectional view taken along the line WW in FIG. 1 according to the same embodiment.

FIG. 13 is a diagram showing the configuration of a rotary disk batch replacement cleaning system according to the same embodiment.

FIG. 14 is a perspective view showing a temporary storage stand according to the same embodiment.

FIG. 15 is a vertical sectional side view of a temporary storage stand according to the same embodiment.

[Figure 16]

[Explanation of symbols]

FIG. 3 is a longitudinal sectional side view showing a washing table according to the same embodiment. DESCRIPTION OF SYMBOLS 1... Main body frame, 2... Lower frame, 3... Upper frame, 11... Turntable drive device, 18... Drive shaft, 22... Receiving shaft, 23... Pressure receiving means (pressure receiving spring), 24... Lower centering recess, 26... Drive tooth, 27... Seat, 31... Turntable lifting device, 32... Lifting shaft, 51... Center pressure device, 52... Center pressure shaft, 59... Upper centering convex portion, 61... Upper pressure roll device, 62 ...Upper pressure roll, 71...Rotary disk,
72...Fixed central axis, 82...Upper centering recess, 86
...Driven tooth, 87...Lower centering convex part.

Claims (2)

[Claims] 1. A main body frame having a fixed lower frame and a fixed upper frame disposed above the lower frame, and a main body frame that is removably inserted between the upper and lower frames, and has a fixed central axis in the upper part. It is rotated around this central axis, and has multiple sets of upper and lower punches around its periphery.
and a rotary disk to which the molar is removably attached, and which has driven teeth of a dog clutch on its lower surface, and drive teeth that mesh with the driven teeth of the dog clutch on its upper surface, and is attached to the lower frame. a rotary disk drive device having a rotatably supported drive shaft, which is attached to the main body frame and rotates the drive shaft; a lower centering convex portion protruding in the shape of a truncated cone on one side; and a lower centering convex portion in the shape of a truncated cone in the other of the lower surface of the center of the rotary disk or the upper surface of the center portion of the drive shaft; It has a lower centering recess that is relatively removably fitted into the side centering convex part, and a plurality of lifting shafts whose upper ends approach and separate from the lower surface of the rotary disk, and is attached to the lower frame, and is attached to the lower frame. an upper presser comprising: a rotary plate elevating device that raises and lowers the rotary plate with an elevating stroke greater than the fitting depth of the side centering convex portion and the lower centering recess; and an upper pressure roll that is attached to the upper frame and is movable up and down; a pressure roll device; a center pressure device having a center pressure shaft attached to the upper frame that can be raised and lowered; and either a lower end of the center pressure shaft or an upper part of the fixed center shaft of the rotary disk; an upper centering convex portion protruding in the shape of a truncated cone; and a truncated cone hole provided in the other of the lower end of the central pressure shaft or the upper part of the fixed central shaft of the rotary disk; A rotary powder compression molding machine comprising a lower centering recess that is removably fitted into the lower centering convex part. 2. A vertically movable receiving shaft having the lower centering concave portion or the lower centering convex portion formed on the upper portion thereof is provided at the center of the drive shaft, and the receiving shaft is supported from below. A pressure receiving means that is disposed and elastically deforms under pressure from the center pressurizing shaft is built into the drive shaft, and is in contact with a lower surface portion around the lower centering convex portion or the lower centering concave portion of the rotary disk. 2. The rotary powder compression molding machine according to claim 1, wherein a contacting ring-shaped seat is provided on the upper surface of the drive shaft and located around the receiving shaft.