JP2000301393A - Cooling water plumbing device of rotary powder compaction molding machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cooling water plumbing device which is free from degradation of the strength of a vertical shaft and a rotary disk in a powder compaction molding machine, and capable of being easily repaired even when a plumbing path is blocked up. SOLUTION: Cooling water is plumbed to circulation water passages 31, 32, 33 in a rotary disk 7 by constructing outside a vertical shaft 1 annular water distributing passage 21 and an annular water collecting passage 22 which are formed concentrically with the rotary disk 7 and whose upper sides are opened, a lid 23 for the water distributing passage and a lid 24 for the water collecting passage which are mounted on the upper surface in an attachable/ detachable manner, a distributing chamber 25 and a collecting chamber 26 mounted on the center of the rotary disk 7, a distributing pipe 27 to connect the lid for the water distributing passage to the distributing chamber and a collecting pipe 28 to connect the lid 24 for the water collecting passage to the collecting chamber 26, and rotary fluid couplings interposed between the distributing chamber 25 and an external water feed piping and between the collecting chamber 26 and an external water discharge piping.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a cooling water supply / discharge device for a rotary powder compression molding machine. More specifically, the present invention relates to a cooling water supply / discharge device for cooling a rotary plate of a rotary powder compression molding machine that compresses powder to form tablets, materials for electronic components, and the like.

[0002]

2. Description of the Related Art One of typical rotary powder compression molding machines for molding tablets, materials for electronic parts and the like is constituted as follows. That is, in the frame, the turntable is supported by a vertical shaft so as to be freely rotatable horizontally, and a plurality of dies are provided at intervals on the periphery of the turntable, and the upper punch and the lower punch are moved up and down corresponding to each mill. It is slidably held, and when it comes to the push position consisting of the upper roll and lower roll with the rotation of the turntable, it acts on the upper and lower punches to push these tips into the dies and fill them into the dies. It is configured to compression-mold the powder obtained.

[0003] In the above-mentioned powder compression molding machine, the rotating part is heated by the sliding portion between the mortar and the punch and the heat generated by the motor and the power transmission mechanism, the temperature of the mortar rises, and the powder of resin or the like is removed. It may be melted by the heat in the mortar and cause a so-called sticking phenomenon. For this reason, not only is it troublesome to clean the inside of the die, but also it is difficult to obtain a molded product of good quality.

Accordingly, a cooling device for cooling a rotating disk has been developed, and one example thereof is disclosed in Japanese Patent Application Laid-Open No. Hei 8-10995. This cooling device will be described with reference to FIG. 5. Referring to FIG. 5, a rotating disk 103 is disposed so as to be horizontally rotatable via an upright shaft 102, and a plurality of dies 104 are provided on the rotating disk 103 at a predetermined pitch. The upper punch 105 and the lower punch 106 are held up and down so as to be slidable up and down, and the turntable 103 is rotated to allow the upper punch 105 and the lower punch 106 to pass between the upper roll and the lower roll. The tip is inserted into the mortar and the powder filled in the mortar is compression molded. Each mill 104 within the thickness of the rotary disc 103
Medium passages A, B, and C for allowing cooling water to flow through portions located therebetween are formed, and cooling water supplied from outside is supplied to the vertical shaft 102 through the medium passages A, B, and C, respectively. And a discharge path E for discharging the cooling water returned through the medium passages A, B and C to the outside are formed in the axial direction. Further, the introduction path D and the medium passage A are
The discharge path E and the medium passage B communicate with a hole 121a formed in the radial direction in the vicinity of the center of the turntable 103, and a discharge path E and a medium passage B are formed in the radial hole 122a formed in the upright shaft 102. It is communicated with a horizontal hole 135 formed in the radial direction near the center of the turntable 103. The cooling water circulates through the vertical shaft introduction path D, the horizontal holes 121a and 134, the medium passages A, C and B, the horizontal holes 135 and 122a, and the vertical shaft discharge path E. 104 is to be cooled.

[0005]

In the prior art, however, the horizontal holes 121a, 122a, 134, 135 are not provided with the vertical shaft 10a.
Since the size of the hole near the center of the rotating disk 103 and the center of the rotating disk 103 cannot be increased, the flow rate is limited and the cooling capacity is inferior. If the rotational speed of the rotary disk is increased to increase the production capacity of the compression molding machine, the strength near the center of the rotary disk is insufficient for the increased centrifugal force. Will not be. Further, if the side holes 121a, 122a, 134, 135 are clogged, the repair takes a lot of labor and time because the side holes are inside the fuselage.
There is a drawback that the downtime becomes longer and the productivity becomes worse.

In view of the above circumstances, the present invention does not reduce the strength of the upright shaft or the rotating disk, improves the production capacity by increasing the number of revolutions, and can easily repair the cooling water even if the cooling water passage is clogged. It is intended to provide a discharge device.

[0007]

According to a first aspect of the present invention, there is provided a cooling water supply / discharge device in which a rotating disk is rotatably supported by a vertical shaft in a horizontal plane, and a plurality of dies are provided at intervals on a peripheral portion of the rotating disk. In addition to providing the upper punch and lower punch in correspondence with each mill, a plurality of upper punches and lower punches are held so as to be able to slide up and down. In a rotary powder compression molding machine which acts on a punch and pushes these tips into a die, and compresses the powder filled in the die, a cooling water passage for cooling the turntable has A disk, a concentrically formed annular distribution channel and collecting channel with an open upper surface, a distribution channel lid and a collecting channel lid for closing the upper surfaces of the distribution channel and the collecting channel, and a center of the rotating disk. A distribution room and a collection room attached to the A distribution lid connected to the channel lid and the distribution chamber, and a collection pipe connected to the collection water channel lid and the collection chamber; and between the distribution chamber and the external water supply pipe and between the collection chamber and the external drain pipe. The rotary fluid coupling interposed in the wall of the rotating disk, extending radially outward from the bottom of the distribution channel to near the space between the dies, inverting therefrom and extending radially inward. It comprises a plurality of circulation waterways connected to the bottom of the collecting waterway.

According to a second aspect of the present invention, the lid for the distribution channel and the lid for the collecting channel are detachably mounted on the upper surfaces of the distribution channel and the collecting channel, respectively. The rotation joint is detachably attached to the distribution chamber and the collection chamber, the distribution pipe is detachably attached to the distribution waterway lid and the distribution chamber, and the collection pipe is It is characterized by being detachable with respect to the lid for the collecting channel and the collecting chamber.

[0009]

Next, embodiments of the present invention will be described with reference to the drawings. First, a schematic configuration of a rotary powder molding machine according to an embodiment of the present invention will be described with reference to FIG.

In FIG. 1, reference numeral 1 denotes a vertical shaft, which is rotatably supported by a frame 4 via bearings 2 and 3, and a lower end of the vertical shaft 1 is connected to a speed reducer 6 and a motor by a joint 5. A rotating disk 7 is fixed to the upper end of the upright shaft 1, and is rotatably supported by a bearing 8 with respect to the frame 4. Therefore, the rotating disk 7 is rotated at a predetermined rotational speed in a horizontal plane by the driving of the motor 6.

The rotary disk 7 is a substantially disk-shaped member in a plan view, and its peripheral portion is provided with holes at regular intervals in the circumferential direction, and a die 9 is attached. Number of mortar 9 is usually several tens
The powder is supplied by a predetermined amount by a powder supply mechanism (not shown). A plurality of upper punches 11 and lower punches 12 are provided in association with the respective dies 9, and are slidably supported vertically by an upper guide 13 and a lower guide 14 formed on the rotary disk 7. I have.

On the other hand, upper rolls 15 and lower rolls 16 are provided at predetermined positions (usually, pre-pressurization and main pressurization) on a turning locus generated by the rotation of the rotary disk 7 of the upper punch 11 and the lower punch 12. , Around a horizontal axis, that is, in a vertical plane, or in a state driven and rotated by a motor or the like.

With the rotation of the rotary plate 7, the upper punch 11 and the lower punch 12 also pivot in a horizontal plane, but are supported by appropriate guides at portions other than the pushing position where the upper roll 15 and the lower roll 16 are provided. The upper punch 11 is above the die 9 and the lower punch 12 is with the tip of the punch slightly inserted into the bottom of the die 9 (right side in the figure).
When the upper punch 11 comes to the pushing position, the upper punch 11
5, the lower punch 12 is pushed up by the lower roll 16 (the state on the left side in the figure), and each punch tip is pressed into the die 9 to compress the powder in the die 9 with a compressive force of several tons. , And molded into a cylindrical shape.

The details of the cooling water supply / discharge device in the powder molding machine as described above will be described with reference to FIGS. FIG. 1 is an enlarged view of a cooling water supply / discharge device, FIG. 2 is a cross-sectional view of a water supply-side water passage in a turntable 7, and FIG.

In FIGS. 1 and 4, an annular distribution channel 21 having an open upper surface is formed concentrically above the turntable 7 and an annular collecting channel 22 having an upper surface opened concentrically inside the distribution channel 21. Are formed. A distribution channel lid 23 that can completely cover the upper surface of the distribution channel 21 is removably attached, for example, with bolts, and the collection channel lid 24 that can completely cover the upper surface of the collection channel 22.
Are detachably attached by, for example, bolts or the like.

At the center of the turntable 7 (which is also the upper end of the upright shaft 1), a distribution chamber 25 and a collecting chamber 26 formed in a cylindrical casing are vertically stacked and connected.
The distribution chamber 25 is detachably attached to the upper end surface of the upright shaft 1 with bolts or the like, and the collecting chamber 26 is detachably attached to the distribution chamber 25 by connecting the respective flanges to each other with bolts or the like. Instead of being mounted on the upper end surface of the upright shaft 1, it may be mounted on the upper surface of the turntable 7 via a suitable support bracket. Further, the distribution chamber 25 may be set to the upper side, and the collecting chamber 26 may be set to the lower side.

A plurality of distribution pipes 27 radially connected between the distribution water pipe cover 23 and the distribution chamber 25 are connected via pipe joints. The distribution chamber 25 is in communication. Also,
A plurality of radially plumbed collecting pipes 28 are connected via pipe joints between the collecting water channel lid 24 and the collecting chamber 26, and the collecting water pipe 22 and the collecting chamber 26 are connected by the collecting pipe 28 exposed to the outside. Are in communication. Since both the distribution pipe 27 and the collecting pipe 28 are connected via a pipe joint, the distribution chamber 2
5 and the collecting chamber 26, as well as to the distribution channel lid 23 and the collecting channel lid 24.

As shown in FIG. 4, a rotary fluid coupling 29 is removably attached to the upper surface of the collecting chamber 26 by means such as screwing.
6 is inserted through the upper flange. Therefore, the water supply port 29a of the rotary fluid coupling 29 is connected to the connection pipe 29c.
And the outlet 29b communicates with the collecting chamber 26.

As shown in FIGS. 1 and 2, a plurality of water passages 31 extend radially outward from the bottom of the annular distribution water passage 21 radially outward within the thickness of the turntable 7. And is sealed with a blind plug 34. Also, a plurality of water passages 32 are provided radially inward from the outer end face of the turntable 7.
Are perforated and connected to the bottom of the collecting channel 22. The outer end of the water channel 32 is also sealed with a blind plug 34. These water channels 31 and 32 are formed one by one so as to partition between the adjacent dies 9, and are provided in the radial direction of the rotating disk 7 slightly outside the dies 9 or in the vicinity of the dies 9, and the up-and-down connecting water channels 3.
3 is drilled from above or from below,
1, 32 are communicated, and the outer end thereof is sealed with a blind plug 34. These water channels 31, 32, and 33 correspond to the circulation water channels described in the claims.

In the above cooling water supply / discharge device, the cooling water is supplied in the order of the rotary fluid coupling 29, the distribution chamber 25, the distribution pipe 27, and the distribution water passage 21, and from there, the water passages 31, 32, 33.
The cooling drainage collected in the collecting water channel 22 flows through the collecting pipe 28, the collecting chamber 26, and the rotary fluid coupling 29, and is discharged to the outside. As described above, in the present embodiment, neither the vertical hole nor the horizontal hole is provided in the upright shaft 1, and the water supply / drainage system is constructed outside. For this reason, the strength near the center of the upright shaft 1 and the turntable 7 does not decrease. Also, for this reason, even if a large centrifugal force is applied by increasing the rotation speed of the turntable 7 in order to increase the production capacity, the centrifugal force can withstand the strength, so that a high production capacity can be provided.

Furthermore, the rotary fluid coupling 29 can be removed from the collecting chamber 26 and the distribution chamber 25 by unscrewing, and the distribution chamber 2 can be removed.
5 and the collecting chamber 26 can be removed from the machine by removing bolts, the distribution pipe 27 and the collecting pipe 28 can be removed from the machine by removing the fittings, and the distribution channel lid 23 and the collection channel lid 2 can be removed.
Since the bolts 4 can be taken out of the machine by removing the bolts, they can be repaired and cleaned as individual parts outside the machine, so that maintenance is easy. Further, with respect to the water channel formed in the rotating disk 7, since the upper surfaces of the distribution water channel 21 and the collecting water channel 22 are opened when the respective lids 23 and 24 are removed, repair and cleaning can be easily performed. Waterways 31, 3
The cleaning tools 2 and 33 can be easily cleaned because the cleaning tool can be inserted from the outside when the blind plug 34 is removed. Therefore,
Even if clogging or the like occurs in the distribution pipe 27, the collecting pipe 28, and the water channels 31, 32, and 33, the recovery is quick, so the downtime can be shortened, and the productivity is improved.

[0022]

According to the first aspect of the present invention, since the vertical shaft 1 is provided with a water supply and drainage system outside without providing a vertical hole and a horizontal hole, the strength near the center of the vertical shaft and the rotating disk is reduced. do not do. For this reason, even if a large centrifugal force acts due to an increase in the number of revolutions of the turntable in order to increase the production capacity, it can withstand the strength, so that a high production capacity can be provided. Furthermore, the rotary fluid coupling is removed from the collecting chamber and the distribution chamber, the distribution chamber and the collecting chamber are removed outside the machine, the distribution pipe and the collecting pipe are taken out of the machine, and the distribution channel lid and the collecting channel lid are removed outside the machine. Since these can be removed and repaired as individual parts outside the machine, maintenance is easy. Further, since the upper surfaces of the distribution channel and the collecting channel formed on the rotating disk are opened when their respective lids are removed, repair and cleaning can be easily performed. Therefore, even if a clogging or the like occurs in the water supply / drainage system, the recovery is quick and the downtime can be shortened, and the productivity is improved. According to the second aspect of the invention, since each member of the supply / discharge device is detachably attached, maintenance and cleaning work can be performed easily and in a short time.

[Brief description of the drawings]

FIG. 1 is an enlarged view of a cooling water supply / discharge device according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view of a water supply-side water channel in the turntable 7;

FIG. 3 is a cross-sectional view of a drain-side water channel in the turntable 7;

FIG. 4 is an explanatory diagram of a schematic configuration of a rotary powder molding machine according to an embodiment of the present invention.

FIG. 5 is a sectional view showing a cooling water supply / discharge device of a conventional rotary powder molding machine.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Vertical shaft 7 Rotating disk 9 Dust 11 Upper punch 12 Lower punch 21 Distribution channel 22 Collecting channel 23 Distribution channel lid 24 Collecting channel lid 25 Distribution chamber 26 Collecting room 27 minute pipe 28 Collecting pipe 31 Water channel 32 Water channel 33 Water channel

Claims (2)

[Claims] A rotating disk is rotatably supported in a horizontal plane by an upright shaft, a plurality of dies are provided at intervals on a peripheral portion of the rotating disk, and a plurality of upper punches and lower punches are associated with the respective dies. The punch is held slidably up and down, and when it comes to the pushing position where the upper roll and the lower roll are provided with the rotation of the turntable, it acts on the upper punch and the lower punch and pushes these punch tips into the die,
In a rotary powder compression molding machine adapted to compression-mold the powder filled in a die, a cooling water passage for cooling the rotary disk is formed concentrically with the rotary disk, and an annular surface having an open upper surface. A distribution channel and a collecting channel, a distribution channel lid and a collecting channel lid for closing the upper surfaces of the distribution channel and the collecting channel, a distribution chamber and a collecting chamber mounted at the center of the rotary disc, and the distribution channel lid. And a distribution pipe connected to the distribution chamber and a collection pipe connected to the collection waterway lid and the collection chamber; and an interposition between the distribution chamber and the external water supply pipe and between the collection chamber and the external drainage pipe. Rotated fluid coupling and, within the thickness of the turntable, extending radially outward from the bottom of the distribution channel to near the space between the dies, inverting therefrom and extending radially inward to form the collecting channel Multiple connected to the bottom Rotary powder compression molding machine of the cooling water supply and discharge apparatus characterized by comprising a ring waterways. 2. The distributing channel lid and the collecting channel lid are detachably mounted on upper surfaces of the distributing channel and the collecting channel, respectively, and the distributing chamber and the collecting chamber are removably attached to the center of the turntable, respectively. The rotary fluid coupling is detachable with respect to the distribution chamber and the collection chamber, the distribution pipe is detachable with respect to the distribution waterway lid and the distribution chamber, and the collection pipe is the collection waterway lid and the 2. The cooling water supply / discharge device for a rotary powder compression molding machine according to claim 1, wherein the cooling water supply / discharge device is detachable from the collective chamber.