JP2695757B2 - 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 rotary powder compression molding machine for compressing powder to form tablets and the like.

[0002]

2. Description of the Related Art As a rotary powder compression molding machine for molding tablets, electronic parts, etc., a rotary disk is horizontally rotatable via a vertical shaft, and a plurality of dies are mounted on the rotary disk at a predetermined pitch. In addition, an upper punch and a lower punch are vertically slidably held above and below each mill. However, in this type of rotary powder compression molding machine, in order to uniformly transmit the pressure at the time of compacting the powder, to improve the fluidity of the powder, and to prevent the molded product from adhering to the die or punch. In order to achieve this (prevention of sticking, binding, etc.), it is common practice to add a powder lubricant at the time of molding. Usually, the lubricant used for this purpose is an upper punch, before the powder is introduced into the die,
It is supplied by spraying to the lower punch and the inner wall of the die.

[0003]

By the way, in order to prevent the above-mentioned sticking, binding, etc.,
Since it is necessary to reduce the friction between the punch and the die sufficiently and to reduce the adhesion between the punch and the product, it is necessary to use a considerable amount of lubricant. However, if such a lubricant is supplied in excess, it will be mixed with the raw material powder to reduce the binding property of the powder. As a result, problems such as insufficient strength of the product and remarkable decrease in disintegration occur. On the other hand, the lubricating liquid that is not a powder used in view of such a problem may scatter to other parts when supplied into the mortar, and may be difficult to supply into the mortar. Also,
Is absorbed by the powder of the raw material, it may not exhibit the effect as a lubricant.

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

[0005]

In order to achieve the above object, the present invention takes the following measures.
That is, the rotary powder compression molding machine according to the present invention arranges a rotating disk so as to be horizontally rotatable via a vertical shaft, and provides a plurality of dies on the rotating disk at a predetermined pitch, and above and below each mill. A rotary powder compression molding machine in which an upper punch and a lower punch are slidably held up and down. The upper punch is inserted into a die, and the upper punch and the lower punch are guided between the upper and lower rolls. Comprising a compression molding part for compression molding the powder of
The compression-molded portion is provided with two pairs of upper and lower rolls which are arranged to perform full-scale compression at a position separated by a predetermined distance after being preliminarily compressed, and an upper punch from within the die in the section separated by the predetermined distance. A supply means for supplying a lubricant at least into the die while the material is being extracted.

[0006] Lubricants Specific aspects of the supply means, which is stored a lubricant into the die spraying ejecting apparatus, and the upper surface
An example is a brush device that drops an agent into a die via a brush implanted on the lower surface.

[0007]

[Action] as long as such a configuration, on the one hand, in a state of compression molded by the lower roll, so that the supply means for supplying lubricant to at least the die. That is, powder, on the one hand, because in a state of being molded by the lower roll, the lubricant is mixed in the powder is significantly reduced, and that adheres to the die inner surface and molded surface of a molded article. Thus, lubricant is excessively supplied binding of the powder is not lowered. Further, even in lubricant liquid, almost no that is absorbed by the powder, it is possible to act efficiently lubricants. As a result, sticking and binding can be prevented.

[0008]

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows a rotary powder compression molding machine A of the present invention.
1 shows the overall configuration of FIG. This rotary powder compression molding machine A
In the frame 1, a rotating disk 3 is horizontally rotatable via a vertical shaft 2 and a plurality of dies 4 are provided on the rotating disk 3 at a predetermined pitch. And the lower punch 6 are slidably held up and down.

More specifically, an upright shaft 2 supported by a bearing 21 is disposed substantially at the center of the frame 1.
A worm wheel 22 is fixed near the lower end of the upright shaft 2.
The rotation driving force of the motor 25 is transmitted through the belt 3 and the belt 24. And this vertical shaft 2
A turntable 3 divided into three functional parts is fixed near the upper end of the turntable. The turntable 3 is provided at a lower portion thereof and holds a lower punch 6 so as to be vertically slidable. An upper punch is provided at an upper portion and holds the upper punch 5 so as to be vertically slidable. Holding part 32, upper punch holding part 32 and lower punch holding part 31
And a die portion 33 provided with a plurality of die mounting holes for removably fitting the die 4 on the same circumference. Upper punch holder 32 and lower punch holder 31
The punch has a plurality of punch holding holes for holding the upper punch 5 and the lower punch 6 slidably. In the rotating disk 3, the lower punch 6, the upper punch 5, and the die 4 are formed with respective punch holding holes and die mounting holes in the longitudinal direction, that is, such that the centers thereof are located on the same straight line. I have.

As shown in FIGS. 2 and 3, the rotary powder compression molding machine A includes a powder filling section 7, a powder sliding section 8, a compression molding section 9, and a product removal section 10. Are sequentially provided along the rotation direction of the rotating disk 3 (indicated by an arrow in FIG. 2).

The powder filling section 7 is configured such that the lower punch 6 is lowered by the lowering device 71 so that the powder P supplied onto the turntable 3 is introduced into the die 4 by the feed shoe 72.
The supply of the powder P onto the turntable 3 is performed by a powder supply mechanism 73.

The powder sliding section 8 raises the lower punch 6 to a predetermined position by the dispensing rail 82, and the powder P overflowing from the inside of the mill 4 due to the raising of the lower punch 6 is moved onto the mill 4 by the sliding plates 83 and 84. It is to be removed from.

The compression molding section 9 is configured to move the upper punch 5 to the guide rail 14.
Down along the downward slope 14a of the
The upper punch lowering safety cam 91 to be inserted into the inside, the upper punch 5 and the lower punch 6 with the tip of the punch inserted into the die 4 are restrained from above and below, and the powder P in the die 4 is preliminarily compressed. The lower pre-compression rolls 92 and 93, the upper punch 5 and the lower punch 6 are restrained from above and below to compress the powder P in the die 4 in earnest. The ascending guide surface 14b and the ascending guide surface 14 for ascending the upper punch 5 to a state where the upper punch 5 is removed from the die 4 within the section L between the compression roll 92 and the upper compression roll 94.
b and a pair of ascending safety cams 96. The upper and lower pre-compression rolls 92 and 93 and the upper and lower main compression rolls 94 and 95 have the same configuration as the conventional one. Has made. The guide rail 14 is arranged along the circumference of the turntable 3 so that the rolling roller 5a rotatably mounted on the side surface of the upper punch 5 rolls on the upper surface thereof. The guide rail 14 of this embodiment is configured so that an annular one as a whole can be divided into a plurality of rails, and the portion of the ascending guide surface 14b can be removed in a state where other portions are fixed. ing. On the other hand, the upper pre-compression roll 9
The injection device J is turned on the rotating disk 3 so that the tip of the nozzle J1 is positioned on the moving orbit of the mill 4 between the roller 2 and the main compression roll 94.
Is disposed in the vicinity of. The injection device J is shown in FIGS.
As shown in FIG. 7, the nozzle J1 and a mounting base J2 capable of adjusting the height of the nozzle J1 are provided.

The nozzle J1 is provided with a base J1b that holds the pipe J1a and the base end of the pipe J1a and independently supplies high-pressure air and a lubricant as a lubricant to the pipe J1a.
And The base J1b is attached to a mount J2 described later so that the height can be adjusted. The nozzle J1 has a double-pipe structure, in which lubricating liquid flows through the inner pipe located inside, and high-pressure air flows into the gap between the inner pipe and the outer pipe whose inner diameter is larger than the outer diameter of the inner pipe. It is flowing. In the nozzle J1, the lubricating liquid is atomized by using the negative pressure generated at the tip end, instead of applying pressure to the lubricating liquid and injecting it. That is, when high-pressure air flows through the outer tube, the nozzle J
Negative pressure is generated at the tip of 1. Due to this negative pressure, the lubricating liquid existing at the tip of the inner tube is sucked out and scatters in a substantially spherical shape in an extension of the tip.

The mounting base J2 has a U-shaped cross-section fixing base J21 having a fixing long hole J2a at the bottom for facilitating alignment with the die 4, and a base plate fixed to the upper surface of the fixing base J21. J22, a front wall J23 fixed to the front edge of the base plate J22, a guide shaft J24 erected on one side of the base plate J22, and a nozzle capable of moving up and down guided by the guide shaft J24. A fixing block J25, a height adjusting plate J26 attached to the upper surface of the nozzle fixing block J25, a ceiling plate J27 fixed to an upper end of the front wall J23 and fixing an upper end of the guide shaft J24, and a height adjusting bolt J28. I have. Nozzle fixing block J25
Has an L-shape in a top view, and has a large thickness at a front portion J25a, and a guide shaft J24 penetrates the front portion J25a. Further, a through hole J25b having a long cross section is formed in the front part J25a from the front to the rear, and a female screw hole J23a is provided in the front wall J23 corresponding to the through hole J25b. Guide shaft J24
Has a screw formed at the upper and lower ends, and a middle portion thereof has a relatively large diameter column. A female screw hole J27a into which the height adjustment bolt J28 is screwed is formed in the ceiling plate J27.
Are drilled.

In such a configuration, the base plate J22 to which the front wall J23 is fixed is attached to the fixing base J21,
After inserting the male screw screwed into the female screw hole J23a of the front wall J23 in the through hole J25 b of the nozzle fixing block J25, the guide shafts in the nozzle fixing block J25 J24
And the guide shaft J24 is erected on the base plate J22. Then, the ceiling plate J27 is connected to the height adjustment plate J26 fixed to the nozzle fixing block J25 so that the tip of the height adjustment bolt J28 is rotatably connected thereto.
To the top of After the mounting base J2 is assembled, the base J1b of the nozzle J1 is provided on the side surface of the nozzle fixing block J25.
With bolts. At this time, the mount J2 is fixed such that the tip of the nozzle J1 is located on the locus of the center of the mill 4. The height of the nozzle J1 is adjusted by rotating the height adjustment bolt J28 so that the nozzle J1 is positioned between the turntable 3 and the upper punch 5. That is, when the height adjustment bolt J28 is rotated, the height adjustment plate J26 moves up or down according to the rotation direction. The nozzle fixing block J corresponding to the movement of the height adjustment plate J26
25 is guided by the guide shaft J24 and moves up and down. When the adjustment is completed in this way, the height adjustment button
The bolt J28 is fastened and fixed with a nut N, and the nozzle fixing block J25 is prevented from descending due to vibration or the like, so that a change in height is prohibited.

The product take-out section 10 includes an upwardly inclined surface 14c of a guide rail 14 which lifts the upper punch 5 and removes it from the die 4.
A push-up roll 101 for urging the lower punch 6 upward to move the product Q in the die 4 upward by a required amount, and guiding the lower punch 6 further upward to push the product Q completely out of the die 4. It has push-up rails 102 and 103 and a guide plate 105 for guiding the extruded product Q to the side and guiding it to the chute 104, and has a configuration similar to that of the conventional one.

Next, the operation of the compression molding machine will be described. The lower punch 6 at the stage after passing through the product take-out section 10 is held at the highest position. When the lower punch 6 moves to the powder filling section 7 by the rotation of the turntable 3, the lower punch 6 is first lowered to the middle position by the guiding action of the lower half 75 of the lowering machine, and is guided by the latter half 77 of the lowering mechanism. It is lowered to a lower position. On the way,
The powder P supplied from the powder supply mechanism 73 onto the turntable 3 is evenly introduced by the powder guiding action of the feed shoe 72. Thereafter, when the lower punch 6 rides on the dispensing rail 82, the lower punch 6 is lifted a little and reaches a predetermined height position, so that the die 4 is filled with the powder P in a set amount. By passing through the sliding plates 83 and 84 in this state, the powder P overflowing onto the mortar 4 is slid off and collected near the center of the turntable 3. Then, upper punch 5
Descends, the tip of the punch is inserted into the mortar 4, and the upper punch 5
And the lower punch 6 are upper, between the lower pre-compression rollers 92 and 93, and
By passing between the upper and lower compression rollers 94 and 95, the powder P in the die 4 is compression molded.

Here, after the upper punch 5 and the lower punch 6 have passed between the upper and lower pre-compression rollers 92 and 93, the upper punch 5 is driven by the rolling roller 5a as shown by an imaginary line in FIG. Ascending guide surface 14b
Is rolled out of the mortar 4 and held at a position above the mortar 4. When the mortar 4 passes through the nozzle J1 of the injection device J, the upper surface of the mortar 4 is open (FIG. 7), and the nozzle J1
When the lubricating liquid is ejected from the nozzle, the lubricating liquid is supplied into the mortar 4.
At this time, since the lubricating liquid is jetted in a substantially spherical shape instead of jetting only below the nozzle J1, the lubricating liquid also reaches the upper punch 5 above the nozzle J1. In addition, at this time, since the powder P is preliminarily compressed by the upper and lower pre-compression rollers 92 and 93, the powder P is not solid but solidified, so that the surface is completely formed after the main compression. It is softer than it is but harder than the powder. Therefore, the mist-like lubricating liquid supplied into the mortar 4
It adheres to the upper surface without being absorbed in the powder P, and penetrates between the mill 4 and the side surface. Thereafter, the upper punch 5 descends again, and the tip of the punch is inserted into the die 4, and the upper punch 5
And the lower punch 6 pass between the upper and lower main compression rollers 94 and 95, so that the powder P in the die 4 is compressed and formed in earnest.

After the molding, the upper punch 5 is first lifted and removed from the mortar 4 at the product take-out section 10, and then the lower punch 6 is pushed up by the push-up roller 101 and the push-up rails 102, 103, so that the product in the mill 4 is removed. Q is extruded onto the turntable 3. Then, the product Q is guided onto the chute 104 by the guide action of the guide plate 105 and is led out of the compression molding machine A.

As described above, a predetermined product Q can be manufactured by repeatedly and continuously compressing and molding the powder P. Further, since the lubricating liquid is supplied to the mill 4 and the upper punch 5 between the pre-compression and the main compression, the lubricating liquid is hardly absorbed by the powder P of the raw material. Therefore, the function of the lubricant can be sufficiently exhibited, and sticking and binding can be reliably prevented.

Next, another embodiment will be described with reference to FIGS.
This will be described with reference to FIG. In addition, the brush device B serving as a supply means
The other configuration of the apparatus is the same as that of the above-described embodiment, and the description is omitted.

In another embodiment, the supply means comprises a brush B1b in which lubricating fluid stored in the upper surface portion is planted on the lower surface.
And a brush device B dripped into the mortar 4 through the mortar 4. That is, the brush device B includes a brush body B1 having a storage portion B1a on an upper surface portion and a nylon brush B1b implanted below the storage portion B1a, for example.
A mounting bracket B2 for detachably holding the brush body B1,
A brush cover B3 for covering the upper part of the brush body B1, a mounting bracket B4 for mounting the mounting bracket B2, a nozzle bracket B6 for fixing a minute adjustment valve B5 for adjusting a discharge amount of lubricating liquid to the mounting bracket B4, and a mounting bracket B4. And a mounting base J2 for adjusting the mounting height of. Note that the mounting base J2 is the same as the mounting base J2 of the above embodiment, and a description thereof will be omitted.

The brush body B1 is formed of a rectangular thick plate, and the brush B1b is planted from the tip portion to a length of about 1/2 of the longitudinal direction. A through-hole B1c communicating with the reservoir B1a is formed at the base end of the brush B1b, so that the lubricating liquid existing in the reservoir B1a descends along the surface of the brush B1b. Further, an inclined groove B1d for guiding the lubricating liquid flowing out of the supply pipe B5a attached to the minute amount adjusting valve B5 to the storage portion B1a is provided continuously to the storage portion B1a.

The mounting bracket B2 has a mounting portion B2a at its tip end for fitting the brush body B1. Mounting part B2
a is a substantially rectangular opening having a step portion for supporting the front end of the brush body B1 and the side portion and the rear end of the inclined groove B1d. When the brush body B1 is fitted, the brush body B1 is opened.
And the upper surface of the mounting bracket B2 are substantially flush with each other. Then, the brush body B1 is attached to the mounting portion B2a.
And the entire brush body B1 is attached to the mounting bracket B2.
The brush cover B3 is attached so as to be in close contact with and cover the upper surface of the brush. The brush cover B3 has a through hole B3a at a position corresponding to the tip of the supply pipe B5a on the rear end side, and the supply pipe B5a.
The front surface, side surfaces and top surface of the lubricating liquid are surrounded so that the lubricating liquid dropped from 5a is not scattered.

The mounting bracket B4 has a metal fitting mounting portion B4a for mounting the mounting metal B2 at a tip portion thereof, and is fixed to a side surface of the nozzle fixing block J25 of the mounting base J2. A nozzle bracket B6 is fixed to a side surface of a substantially central portion of the mounting bracket B4. The nozzle bracket B6 is an inverted L-shaped metal fitting, the vertical wall of which is fixed to the mounting bracket B4, and the minute adjustment valve B5 is mounted on the horizontal wall. Further, a long hole B4b long in the longitudinal direction of the mounting bracket B4 is formed near the rear end.
A bolt is inserted into the long hole B4b when fixing the long hole B4b to the nozzle fixing block J25, so that the longitudinal position of the mounting bracket B4 can be adjusted.

In such a configuration, the brush body B1
Is attached to the mounting bracket B2, and the brush cover B3 is fixed to the mounting bracket B2. Attach this mounting bracket B2 to the mounting bracket B
4 and a nozzle bracket B6 to which a minute adjustment valve B5 to which a supply pipe B5a is mounted is fixed to the mounting bracket B4. The assembly of the brush device B is completed by fixing the thus assembled brush portion to the mounting base J2. The mounting base J2 is adjusted in position and fixed near the turntable 3 in the compression molding section 9 as in the above embodiment. More specifically, the position of the brush B1b of the brush body B1 is adjusted so that the center of the brush B1b coincides with the locus of the center of the mill 4, and the mounting base J2 is fixed. The height adjustment of the brush portion is performed in the same manner as in the above embodiment, and is adjusted to a height position such that the lower end of the brush B1b slightly enters the die 4. That is, when the mill 4 passes under the brush B1b, the tip of the brush B1b implanted in a range corresponding to the opening area of the mill 4
To ensure that the lubricating liquid is dripped into the mortar 4. In this case, the brush B1 is directly applied to the pre-compressed powder P.
Adjust so that the tip of b does not touch. In addition, the height is adjusted so that the brush cover B3 is at a position lower than the tip position of the upper punch 5 which is pulled out from the die 4 and held.

As described above, the brush device B includes the brush B1.
b is attached so that the surface of the turntable 3 is always in sliding contact with the surface of the rotary disc 3 and the tip of the brush B1b enters the die 4, so that when the tip of the brush B1b enters the die 4, the brush B1b is inserted through the through hole B1c. The lubricating fluid in the reservoir B1a that has reached
The powder P falls down along the inner wall of the mortar 4 and also drops on the upper surface of the pre-compressed powder P. Therefore, since the lubricating liquid exists on the side surface and the upper surface of the pre-compressed powder P, sticking and binding when the product Q after the main compression is extracted from the die 4 can be reliably prevented. Further, since the brush body B1 is detachably attached to the mounting bracket B2, for example, if a product Q having a different length of the brush B1b is prepared according to the type, the brush body B1 is pre-compressed from the turntable surface. When the distance to the upper surface of the powder P is different, the lubricating liquid can be supplied without causing the tip of the brush B1b to slide on the powder P without performing the height adjustment of the mounting table J2 again. it can. Also, brush cover B
3 covers the top end of the supply pipe B5a and covers the upper surface of the brush body B1, so that even when the lubricating liquid falls from the supply pipe B5a to the brush body B1, it is affected by the flow of surrounding air and the like. And the inclined groove B1
d, and can reliably prevent powder P or the like from being mixed in the storage section B1a.

The present invention is not limited to the embodiments described above. For example, a case where a liquid lubricant is used as a lubricant has been described. A powder lubricant may be used in place of the liquid.

In another embodiment, the brush body B
1, the brush B1b is implanted only on the lower surface, but the brush B1b may be implanted at the upper surface position of the storage section B1a. That is, the storage portion B1a may be formed in the middle of the brushes B1b provided on the upper and lower sides, and the upper brush may be configured to slidably contact the extracted upper punch 5. As described above, by actively applying the lubricant to the upper punch 5, sticking can be further effectively prevented.

In addition, various modifications can be made without departing from the spirit of the present invention.

[0033]

According to the present invention, since a configuration described above, supplies powder, on the one hand, in a state of compression molded preliminarily by the lower rolls, the lubricant supply means at least in the mortar so that the lubricant is mixed in the powder is significantly reduced, it is possible to prevent a decrease in binding. Since the powder has been preliminarily compressed, the powder is solidified and surely lubricated on the inner surface of the die and the surface of the molded product.
An agent can be applied. In addition, even when a liquid lubricant is supplied, since it is not in a powder state in the mortar when supplied, it is possible to almost completely prevent the liquid lubricant from being absorbed into the powder. The agent can function efficiently. As a result, sticking and binding can be effectively prevented.

[Brief description of the drawings]

FIG. 1 is a front sectional view showing one embodiment of the present invention.

FIG. 2 is a schematic plan view showing the turntable of the embodiment.

FIG. 3 is an exploded front sectional view of the turntable of the embodiment.

FIG. 4 is an enlarged front view showing a main part of the embodiment.

FIG. 5 is a perspective view showing the injection device of the embodiment.

FIG. 6 is an exploded perspective view showing the injection device of the embodiment.

FIG. 7 is an enlarged side view showing a schematic attachment state of the injection device of the embodiment.

FIG. 8 is an enlarged side view showing an attached state of a brush device according to another embodiment of the present invention.

FIG. 9 is a plan view of a brush device according to another embodiment.

FIG. 10 is a perspective view of a brush device according to another embodiment, excluding a mounting base.

[Explanation of symbols]

 2 ... Standing shaft 3 ... Rotating disc 4 ... Mold 5 ... Upper punch 6 ... Lower punch 7 ... Powder filling section 8 ... Powder sliding section 9 ... Compression molding section 10 ... Product taking out section 92 ... Upper pre-compression roll 93 ... Lower pre-roll Compression roll 94: Upper compression roll 95: Lower compression roll B: Brush device J: Injection device

Claims (3)

(57) [Claims] 1. A rotating disk is horizontally rotatable via a vertical shaft, a plurality of dies are provided on the rotating disk at a predetermined pitch, and an upper punch and a lower punch are vertically slid above and below each mill. A rotary powder compression molding machine capable of holding and holding the upper punch, inserting the upper punch into the mortar, guiding the upper punch and the lower punch between the upper and lower rolls, and compressing and molding the powder in the die. Wherein the compression-molded part comprises two pairs of upper and lower rolls arranged to perform full-scale compression at a position separated by a predetermined distance after being preliminarily compressed; Lubrication while the upper punch was removed from inside the mill
A rotary powder compression molding machine comprising a supply means for supplying an agent into at least a die. Wherein supply means, rotary powder <br/> compression molding machine according to claim 1, characterized in that the injection device for spraying a lubricant in the die. Wherein supply means, rotary powder according to claim 1, characterized in that a brush device which dropped into the die through the brushes planted a lubricant to the lower surface reserved in the upper surface Compression molding machine.