JP3527711B2 - Rotary powder compression molding machine - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a main body in which a main shaft is rotatably mounted, a rotary disk is detachably attached to the main shaft, and the rotary disk is driven together with a die or a punch by driving the main disk. The present invention relates to a rotary type powder compression molding machine adapted to rotate.

[0002]

2. Description of the Related Art Conventionally, in a rotary powder compression molding machine for compressing and molding powder in a die attached to a rotary disc when a punch passes between upper and lower rolls, the rotary disc is fixed to a vertical shaft. In general, the rotating shaft is rotated by rotating the vertical shaft. In recent years, in order to improve the cleaning performance of the rotary disk, a rotary disk that can be easily removed from the vertical shaft has been developed.

For example, there is known one in which a rotating disk and a vertical shaft are detachably connected by a large key and a key groove. Specifically, a slide key is attached to the lower surface of the turntable, and a key groove is formed on the upper end side of the standing shaft corresponding to the slide key. The center of each of the slide key and the key groove is made to match the center of the rotary disk and the vertical shaft by the centering pin.

[0004]

By the way, in the above construction, when the rotary disk is removed from the vertical shaft, the rotary disk is once raised above the vertical shaft, and thereafter, for example, the rotary disk is slidably guided and supported. Detachable rails are used to guide the turntable to the outside. With such a structure, the lower punch is removed together with the turntable in a state of being attached to the turntable without being dropped from the turntable when the turntable is raised.

On the other hand, the quantity rail for setting the quantity of powder is generally attached to the frame so that it can be moved up and down. That is, this quantity rail is attached in a state where the lower end portion of the lower punch, that is, the head portion is rolled up. Therefore, if the lower pestle is removed from the turntable before it reaches the quantity rail, or if the lower pestle is slidably engaged with the quantity rail, the quantity rail must be removed from the frame. The rotating disk cannot be removed in the same way as described above. Therefore, when the turntable is removed from the vertical shaft, work on the quantity rail portion is required as a pre-work, and the work required to remove the turntable increases and takes time.

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

[0007]

The present invention takes the following means in order to achieve such an object. That is, the rotary powder compression molding machine according to the present invention,
A rotary disc is horizontally rotatable via a vertical shaft in the frame and is detachably attached to the vertical shaft.A plurality of mortars are provided on the rotary disc at a predetermined pitch, and the mortars are placed above and below each mortar. Hold the punch and lower punch slidably up and down, and pass the upper and lower punches with the tip of the punch inserted into the die between the upper and lower rolls to compress and mold the powder filled in the die. In the rotary powder compression molding machine configured as described above, the lower punch is mounted so as to be able to move up and down on the rotating plate and surrounds the lower end of the lower punch to adjust the amount of powder filled in the die. A guide mechanism, an elevating mechanism that is arranged on the frame so as to be able to come in and out of contact with the guide mechanism to elevate the guide mechanism, and a drive mechanism that drives the elevating mechanism to elevate the guide mechanism that is in contact with the elevating mechanism. It is characterized by being prepared.

According to this structure, when the turntable is connected to the vertical shaft, the guide mechanism is moved up and down by the drive mechanism driving the elevating mechanism when the elevating mechanism is in contact. , The position of the lower punch with respect to the die will be adjusted. Then, by adjusting the lower punch, the amount of powder filled in the die is adjusted.

On the other hand, the elevating mechanism is arranged on the frame, but since it is arranged so that it can be brought into contact with and separated from the guide mechanism,
When the turntable is removed, the guide mechanism attached to the turntable is disengaged from the lifting mechanism. In other words, although the guide mechanism is moved up and down by the elevating mechanism, the guide mechanism and the elevating mechanism can be separated from each other. Therefore, for example, when the turntable moves to the upper side in the axial direction of the vertical shaft, the turntable moves with the movement of the turntable. Guide mechanism moves to the upper side. As a result, the guide mechanism is separated from the elevating mechanism, and is removed together with the lower punch while being attached to the turntable while surrounding the lower end of the lower punch. Therefore, it is not necessary to separately remove the lower punch and the guide mechanism in the work of removing the turntable, so that workability can be improved.

Examples of the guide mechanism include a rail member having a groove for slidably supporting the lower end portion of the lower punch.

In order to increase the lifting accuracy of the guide mechanism with a simple structure, the lifting mechanism includes a male screw member that is rotated by the drive mechanism and a female screw member that is lifted and lowered according to the rotation of the male screw member. Is preferred.

As a means for driving such a lifting mechanism, a driving mechanism is provided with an electric motor and a gear device for supplying a driving force to the lifting mechanism, and a detection device for detecting a lifting amount of the lifting mechanism. It is suitable.

In order to prevent the powder from adhering to the lifting mechanism and from being exposed to water, the frame has an upper frame having an upper space for accommodating the turntable, and a space for the upper frame below the upper frame. Is composed of a lower frame that forms an isolated lower space, and the drive device is preferably mounted in the lower space of the lower frame.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION An example of an embodiment of the present invention will be described below with reference to FIGS.

FIG. 1 shows the overall structure of the rotary powder compression molding machine of the present invention.

This rotary powder compression molding machine has a frame 1
A turntable 3 which is horizontally rotatably disposed inside the standing shaft 2 can be removed from the standing shaft 2 for cleaning or inspection. That is, in this rotary powder compression molding machine, a plurality of dies 4 (shown in FIG. 3) are provided on the turntable 3 at a predetermined pitch, and upper and lower punches 5 and 6 are vertically slid above and below each die 4. It is held as possible. When the tip of each of the upper punch 5 and the lower punch 6 is inserted into the die 4, when it is passed between the upper roll 7 and the lower roll 8 of the cantilever support type, the powder filled in the die 4 is compressed. An upper roll 7 and a lower roll 8 are arranged at the upper and lower positions of the turntable 3 so that they can be molded.

In this embodiment, the upper roll 7 is attached to the lower surface of the horizontal beam portion of the upper frame 1b so as to be slidable by the roll moving mechanism MV. The upper roll 7 is fixed to the frame 1 so as to be immovable at all times, and when the fixing is released, the upper roll 7 can be slid in the back direction. Also, the upper and lower rolls 7 and 8
In order to make the configuration easy to understand, in a side view in FIG. 1, each is viewed from the side, and a pair for pre-compression and main compression is paired. Only one is shown. Further, in order to clearly show the positional relationship of the main components such as the frame 1, the vertical shaft 2 and the turntable 3, the powder supply device and the molded product take-out portion are not shown.

The frame 1 is composed of an upper frame 1b having an upper space for accommodating the turntable 3 and a lower frame 1a forming a lower space below the upper frame 1b which is isolated from the space of the upper frame 1b. To be done. This configuration basically aims to separate the molding section for compression molding from the driving section for driving the molding section. Specifically, a drive motor M is attached inside the lower frame 1a, and a gear chamber 10 for accommodating the worm wheel 9 is formed above the drive motor M. The rotation of the drive motor M is transmitted to the worm 11 via the belt 12. A support board 13 that supports the vertical shaft 2 is placed and fixed on the upper surface of the gear chamber 10. For this reason, the inside of the gear chamber 10 is
It is in a state of being isolated from the upper side of the lower frame 1a on which the turntable 3 is arranged, and the invasion of powder and the like to be molded is blocked. A vertical shaft lower bearing 14 is attached to the bottom surface of the gear chamber 10.

The standing shaft 2 is formed to have a diameter as large as possible in order to increase the rigidity, and the standing shaft lower bearing 14 and the upper and lower tapered roller bearings 15 and 16 described above are used.
With this, the frame 1 is rotatably disposed in the substantially central portion thereof. A lower clutch plate 51a, which is a joint mechanism described later, is fixed to the upper end portion of the upright shaft 2.

The turntable 3 is disposed on the lower side, holds the mortar 4 detachably on the same circumference at a predetermined pitch, and holds the lower punch 6 slidably, and a turntable lower part 3a. A rotary shaft arranged at the center of the lower portion 3a via a bearing, and a rotary disc upper portion 3 rotatably attached to the rotary shaft via the bearing and slidably holding the upper punch 5
b. The turntable 3 is adapted to be hung upward when being removed by a turntable lifting mechanism E attached to the upper wall of the upper frame 1b.

In order to connect the rotary disc 3 and the vertical shaft 2, an upper clutch plate 51c of the joint mechanism loose-mesh clutch 51 shown in FIG. 2 is attached to the lower end of the rotary shaft, and the lower face of the rotary shaft is attached. Is at a position recessed upward from the plane formed by the vertices of the plurality of claws 51d of the upper clutch plate 51c. Therefore, the plurality of claws 51d of the upper clutch plate 51c are arranged around the lower surface of the rotating shaft.

Corresponding to the upper clutch plate 51c, a lower clutch plate 51a constituting the meshing clutch 51 is attached to the upper end of the upright shaft 2 via a height adjusting plate. The lower clutch plate 51a and the upper clutch plate 51c are
As shown in FIG. 2, it is of an annular shape having the same shape, into which the upper end of the standing shaft 2 and the lower end of the rotary shaft can be inserted in the center, and a plurality of claws 5 are provided on the upper and lower surfaces of the outermost peripheral portions.
1d is provided and constitutes a so-called pair of couplings. Lower clutch plate 51a and upper clutch plate 51c
Is a structure in which a plurality of bolts are used to fix the inner flat portion of the claw 51d. The shape of the claw 51d is, for example, a trapezoid in a side view, and the claw 51d of the lower clutch plate 51a.
Has a convex side surface in the circumferential direction, and correspondingly the claw 51d of the upper clutch plate 51c has a concave side surface in the circumferential direction.

The upper punch 5 held on the turntable 3 is guided to the highest position in the vicinity of the powder filling position by the guide rail 30 attached near the upper end of the vertical shaft 2, and is guided to the upper roll 7. At the reaching position, it is guided to a lower position where it can enter under the roll 7. Further, the lower punch 6 is pulled down by the lowering device 31 provided on the lower side of the turntable 3 and, after the compression by the lower roll 8 is completed, when the molded product formed by the compression is taken out from the die 4, the lower punch 6 is rotated. A push-up rail 32 provided on the lower side of the guide 3 is guided to the highest position. further,
At the powder supply position, a quantity rail BR constituting the guide mechanism 17 is attached to the turntable so as to be vertically movable so as to be continuous with the lowering device 31. The upper punch 5 and the lower punch 6 are held by the turntable 3 in a state where the turntable 3 is separated from the vertical shaft 2 and removed together with the turntable 3, the guide rail 30, the lowering device 31, the guide mechanism L and the like. It is configured to allow

As shown in FIGS. 4 and 5, the guide mechanism L includes a quantity rail BR, a mounting bracket 17 for mounting the quantity rail BR on the turntable 3, and a mounting bracket 17 for sliding a leg portion Bra of the quantity rail BR. And a cover body 18 surrounding a leg supporting portion that is movably held. The quantity rail BR has an arcuate shape in a plan view and supports the head of the lower punch 6 so as to surround the head, that is, a rail main body portion having a groove portion in which a part of the head of the lower punch 6 is slidably fitted. BRb and two leg portions BRa that support the rail main body portion at, for example, two places separated from each other are provided. Each leg BR
The upper end of a is connected to the rail main body BRb so as to be integrated, and the lower end thereof is connected to efficiently transmit a pressing force from a lifting mechanism E described later to the rail main body BRb. . The middle portion of the leg portion BRa is slidably supported by the mounting bracket 17. The cover body 18 is formed by the mounting bracket 17
In order to prevent powder and the like from adhering to the leg support portion of the leg portion, the coil spring 18a expands and contracts as the quantity rail BR is moved up and down. As shown in FIG. 6, the coil spring 18a biases the lower end portion BRaa of the leg portion Braa downward. And an inner cylinder 18b and an outer cylinder 18c having the coil spring 18a therein.

Such a guide mechanism L includes an elevating mechanism F which is arranged on the frame 1 so as to be able to come in and out of contact with the guide mechanism L to elevate the guide mechanism L, and a quantity rail BR which abuts on the elevating mechanism F. The position of the lower punch 6 is controlled by moving up and down to adjust the amount of powder by a drive mechanism MF that drives the lifting mechanism F to move.

The elevating mechanism F includes a ball screw 19 which is a male screw member rotated by a drive mechanism MF, a quantity adjusting shaft 20 which is a female screw member which is elevated and lowered according to the rotation of the ball screw 19, and an upper portion of the lower frame 1a. It is composed of an upper mounting bracket 21 and a lower mounting bracket 22 which are attached to the shaft to support the amount adjusting shaft 20 so as not to be rotatable and slidably movable. The ball screw 19 is connected to the drive mechanism MF and meshes with the amount adjustment shaft 20. The quantity adjusting shaft 20 has a cylindrical shape, and a female screw corresponding to the ball screw 19 is formed therein, and the upper end of the quantity adjusting shaft 20 comes into contact with and separates from the quantity rail BR.
The lower mounting bracket 22 is attached to the through hole 1aa provided in the upper wall of the lower frame 1a so as to seal the through hole 1aa, and the upper mounting bracket 21 is closely attached to the lower mounting bracket 22.

The drive mechanism MF comprises an electric motor 23 and a gear device 24 for supplying a driving force to the lift mechanism F, and a detection device 25 for detecting the amount of lift of the lift mechanism F. The drive mechanism MF is mounted inside the sealed space of the lower frame 1a. Therefore, the drive mechanism MF
Is disposed in a state of being separated from the powder that is compressed and scattered from water and the like during cleaning. Gear device 24
Is engaged with a ball screw gear 24a connected to the lower end of the ball screw 19 and the ball screw gear 20 to allow the electric motor 2
3 is mounted on the output shaft of the electric motor 23 and the amount adjusting driving gear 24b for transmitting the rotational driving force of the No. 3 to the ball screw gear 24a to limit the rotational driving force applied to the amount adjusting driving gear 24b to prevent the excessive amount rail BR from moving. It is composed of a quantity adjusting torque limiter 24c for preventing lifting. As the electric motor 23, for example, a stepping motor can be used. The detection device 25 includes a potentiometer 25a, a potentiometer gear 25b attached to the input shaft of the potentiometer 25a, and a potentiometer intermediate gear 25c that meshes with the potentiometer gear 25b and the amount adjustment driving gear 25b.

Further, as shown in FIG.
On the side surface near the lower surface side, a female screw hole 3ab corresponding to the lower punch 6 and reaching the through hole 3aa for holding the lower punch 6 is formed. A ball plunger PL, which is a pressing member, is screwed into the female screw hole 3ab. This ball plunger PL has a thread formed on the outer periphery thereof, a coil spring is built in the inside thereof, and a plastic ball PLa urged by the coil spring is projected from the tip thereof in a non-removable manner. Ball plunger PL with female screw hole 3ab
When the lower punch 6 is slid up and down, the lower punch 6 is held in the through hole 3aa and is slidable with a predetermined torque.
Even if you lift it up to the specified position when removing the ball,
Since a is biased by the coil spring, the pressing force acts on the lower punch 6 and the lower punch 6 is prevented from falling. Therefore, the lower punch 6 does not fall off the turntable 3.

With such a structure, when the powder is compression-molded, the rotary table 3 is pressed against the vertical shaft 2 by the rotary disk lifting mechanism F, and the meshing clutch 51 is brought into the engaged state, so that the vertical shaft 2 The turntable 3 is connected.
Therefore, when the drive motor M is energized, the turntable 3 is
The standing shaft 2 is rotated and driven.

In powder compression molding, the quantity rail BR
Is adjusted. The quantity rail BR rotates the ball screw 19 via the gear device 24 by energizing the electric motor 23 of the drive mechanism MF. Since the ball screw 19 is connected to the gear device 24, the ball screw 19 only rotates in the quantity adjusting shaft 20 and its position does not change, and the quantity adjusting shaft 20 supported so as not to rotate rises or descends according to the rotation direction. To do. By the lifting operation of the quantity adjusting shaft 20, the quantity rail BR is moved up and down, and the amount of the powder filled in the mortar 4 is adjusted. In this case, the quantity adjusting shaft 2
In the case of 0, the two leg portions BRa which are spaced apart are moved up and down at the same time, so that the up-and-down position of the weighing rail BR can be adjusted smoothly.

When the quantity rail BR is lowered,
The coil spring 18a allows the leg portion B of the weighing rail BR to
Since the lower end portion BRaa of Ra is urged downwardly, the lower end portion BRaa of the leg portion Braa has the lower end portion BRaa.
Never leave. Therefore, even if the quantity rail BR and the lifting mechanism F are provided so as to be able to come into contact with and separate from each other, the quantity rail BR is always the lifting mechanism F, specifically, while the turntable 3 is connected to the vertical shaft 4. Is the adjustment shaft 2
It is in contact with 0, and the position of the lower punch 6 can be adjusted.

Since the potentiometer 25a is rotated by the electric motor 23 via the potentiometer gear 25b and the potentiometer intermediate gear 25c, the position of the quantity rail BR can be detected based on the signal output from the potentiometer 25a.

Next, when the turntable 3 is removed, the upper roll 7 fixed to the upper frame 1b is moved in the rear direction to form a space in the upper frame 1b in which the turntable 3 can move upward. To do. After that, the turntable lifting mechanism E is operated to lift the turntable 3 to a height at which it can be carried out. The turntable 3 has a turntable guide rail attached to the upper wall of the upper frame 1b, and is supported by the turntable guide rail to carry out the turntable 3 from the frame, as in this embodiment. Good. Further, in a state of being detachably hung by the turntable lifting mechanism E, the turntable 3 may be supported and carried out by a carrier device such as a forklift.

Then, as shown in FIGS. 6 and 7, when the turntable 3 is raised to a predetermined position required for carrying out, the turntable 3 and the upper punch 5, the lower punch 6, the guide rails 30, and the lowering device 31 are arranged. And the quantity rail BR and the like are integrally raised. That is, when removing the turntable 3, it is not necessary to remove the lower punch 6, the guide rail 30, the lowering device 31, and the quantity rail BR from the turntable 3. That is, the quantity rail BR is attached to the turntable 3 by the attachment bracket 17, but the lower end portion BRaa of the leg portion BRa of the quantity rail BR can be brought into contact with and separated from the lifting mechanism F. Therefore, when the turntable 3 is lifted, the quantity rail BR can be separated from the lifting mechanism F while holding the lower punch 6.

In this embodiment, since the drive mechanism MF is mounted in the lower frame 1a, even if the rotary disc 3 is removed and then the inside is cleaned with water, it is not exposed to water. Therefore, the electric motor 23 of the drive device MF
It is not necessary to perform electrical wiring to the or potentiometer 25a using a connector or the like having excellent waterproof performance, the configuration of the electrical wiring portion can be simplified, and use of special parts can be avoided. The manufacturing cost can be reduced.

The present invention is not limited to the embodiment described above.

In the above embodiment, the drive mechanism MF is used.
Has been mounted inside the space formed by the lower frame 1a, the upper side of the upper wall of the lower frame 1a,
That is, it may be attached inside the space formed by the upper frame 1b. In this case, since there is a possibility of being exposed to water when cleaning with water, connectors having a waterproof structure are used for the electric wiring.

Besides, the configuration of each part is not limited to the illustrated example, and various modifications can be made without departing from the spirit of the present invention.

[0039]

As described in detail above, according to the present invention, when the rotary disk is connected to the vertical shaft, the guide mechanism is
When the elevating mechanism is in contact, the drive mechanism drives the elevating mechanism so that the elevating mechanism moves up and down to move the lower punch to a predetermined position. Therefore, the amount of powder filled in the die can be adjusted.

On the other hand, the elevating mechanism is arranged on the frame, but since it is arranged so that it can be brought into contact with and separated from the guide mechanism,
When the turntable is removed, the guide mechanism attached to the turntable can be removed from the lifting mechanism. In other words, although the guide mechanism is moved up and down by the elevating mechanism, the guide mechanism and the elevating mechanism can be separated from each other. Therefore, for example, when the turntable moves to the upper side in the axial direction of the vertical shaft, the turntable moves with the movement of the turntable. The guide mechanism is moved upward so that the guide mechanism is separated from the elevating mechanism, and can be removed from the frame while enclosing the lower end of the lower punch and attached to the turntable together with the lower punch. Therefore, it is not necessary to separately remove the lower punch and the guide mechanism in the work of removing the turntable, so that workability can be improved.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing an embodiment of the present invention.

FIG. 2 is a perspective view of the meshing clutch according to the same embodiment.

FIG. 3 is an enlarged vertical cross-sectional view showing a main part of a lower portion of the rotary disc of the embodiment.

FIG. 4 is an enlarged vertical sectional view showing a guide mechanism, a lifting mechanism, and a drive mechanism of the same embodiment.

FIG. 5 is an enlarged vertical cross-sectional view showing a guide mechanism and a lifting mechanism of the same embodiment.

FIG. 6 is an enlarged vertical sectional view showing a state in which the guide mechanism and the elevating mechanism of the same embodiment are separated from each other.

FIG. 7 is an enlarged vertical sectional view showing a state in which the guide mechanism and the elevating mechanism of the embodiment are separated.

[Explanation of symbols]

1 ... Frame 2 ... Vertical shaft 3 ... Turntable 4 mortar 5 ... Kamiki 6 ... Lower punch 7 ... Top roll 8 ... Lower roll 19 ... Male screw member (ball screw) 20 ... Female screw member (quantity adjusting shaft) 23 ... Electric motor 24 ... Gear device 25 ... Detection device 1a ... lower frame 1b ... Upper frame F ... Lifting mechanism MF ... Drive mechanism L ... Guidance mechanism

─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-7-241698 (JP, A) JP-A-11-207500 (JP, A) Jikken 2-44958 (JP, Y2) (58) Field (Int.Cl. ⁷ , DB name) B30B 11/08 A61J 3/10

Claims (5)

(57) [Claims] 1. A rotary disk is horizontally rotatably mounted in a frame via a vertical shaft and is detachably attached to the vertical shaft, and a plurality of dies are provided on the rotary disk at a predetermined pitch. The upper and lower punches are held above and below the die so that they can slide up and down, and the upper and lower punches with the tips of the punches inserted into the die are passed between the upper and lower rolls to fill the die. In a rotary powder compression molding machine adapted to perform compression molding of the powder, the lower punch of the lower punch is surrounded so as to adjust the amount of powder to be mounted in the die so as to be vertically movable. A guide mechanism that guides the lower punch, an elevating mechanism that is installed in the frame so that it can come in and out of contact with the guide mechanism, and that elevates the guide mechanism, and an elevating mechanism that moves the guide mechanism that is in contact with the elevating mechanism. And a drive mechanism for Rotary powder compression molding machine. 2. The rotary powder compression molding machine according to claim 1, wherein the guide mechanism comprises a rail member having a groove for slidably supporting the lower end portion of the lower punch. 3. The rotary type according to claim 1, wherein the elevating mechanism comprises a male screw member rotated by a drive mechanism and a female screw member which is elevated and lowered according to the rotation of the male screw member. Powder compression molding machine. 4. The driving mechanism comprises an electric motor and a gear device for supplying a driving force to the lifting mechanism, and a detection device for detecting the amount of lifting of the lifting mechanism. The rotary powder compression molding machine described. 5. The drive device comprises: an upper frame having an upper space for accommodating a turntable; and a lower frame which forms a lower space below the upper frame and which is isolated from the space of the upper frame. The rotary powder compression molding machine according to claim 1, wherein the rotary powder compression molding machine is mounted in the lower space of the lower frame.