JP2005028439A - Rotary powder compacting machine and method of producing tablet using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rotary powder compacting machine suitable for producing nearly C-shaped tablets while preventing an upper pestle and a lower pestle, to the utmost, from touching the inner face of a mortar in compacting powder in the mortar by means of the pestles. <P>SOLUTION: The shape of the mortar 22 is slightly expanded in the traveling direction of the mortar 22 so that clearances S larger than that on other parts are formed on the portions in the mortar 22 of which front side and/or rear side toward the traveling direction of the mortar 22 form walls and on the faces of the rear wall and/or the front wall of the upper pestle 30 opposed to the above portions (walls), whereby the inner walls of the mortar 22 are not flawed. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a rotary powder compression molding machine that compresses a powder material filled in a die with an upper punch and a lower punch in the die and molds tablets and the like, and a tablet manufacturing method using the same.

  For example, pills such as xylitol, which is suitable for preventing caries in infants that cannot be brushed spontaneously, and troches that disinfect and sterilize the throat, may cause airway obstruction after being placed in the mouth. In order to prevent this from occurring, it has also been proposed that it is formed in a donut shape with an opening formed in the center so as to easily collapse in the mouth. In addition, other forms such as a substantially C-shape have been proposed. As common points, they are provided in a configuration having a large surface area and partially formed with openings when viewed from the maximum projected area side.

  Such tablets are generally produced by compacting a powder material with a rotary powder compression molding machine.

  In the conventional rotary powder compression molding machine, for example, as described in Patent Document 1 and the like, the upper and lower punches inserted from above and below slide with respect to the mortar attached to the rotating disk. As a result, the powder is generally compression molded.

  FIG. 7 shows a conventional rotary compression molding machine.

This powder compression molding machine A moves up and down the upper punch 3 with the upper guide rail 7 and the like along with the rotation of the rotating disk 1 and raises and lowers the lower guide 5 with a lower punch raising cam member and the like. 2, the powder material in the powder feeder 9 is taken in and weighed, and then the upper punch 3 and the lower punch 5 are moved in the axial direction so as to approach each other by the upper pressure roll 16 and the lower pressure roll (not shown). The molding material cycle in which the powder material filled in 2 is compression-molded and a molded product such as a tablet thus molded is pushed out of the die 2 is repeated (see Patent Document 1).
Japanese Patent Laid-Open No. 11-207499 (second page and FIG. 4)

  By the way, in such a compression molding machine A, the head 3a of the upper collar 3 has a tapered shoulder portion like an abacus ball, and has been tapered by the upper collar guide track 7 and the like. Since the roll 16 presses the head portion 3a downward, the upper collar 3 is not lowered straight with respect to the axial direction with respect to the guide hole 4, but is pushed down in a slightly inclined posture. .

  Thus, when the upper punch 3 is pushed downward in a slightly inclined posture, the upper punch 3 comes into contact with the inner wall surface of the die 2 when inserted into the die 2, and as a result, the inner wall of the die 2. There is a problem that the fine powder of the mortar 2 and the upper punch 3 is mixed into the tablet.

  In view of such a situation, the present invention can prevent the wrinkle from contacting the inner surface of the die as much as possible, for example, when the powder is compression molded in the die with the upper and lower punches. An object of the present invention is to provide a rotary powder compression molding machine that does not cause scratches or the like on the inner wall or the like.

  Another object of the present invention is to provide a preferable method for producing a tablet in which a notch from a part of the outer periphery toward the center point is formed.

In order to achieve the above object, the present invention is directed to a mortar provided on a rotating disk in a direction in which an upper punch is approached from above and a lower punch is approached from below through an upper punch holder hole and a lower holder hole, respectively. Is a rotary powder compression molding machine that compresses and molds the powder loaded in the die into a predetermined shape,
A clearance larger than the other portions in a portion in which at least the rear side and / or the front side becomes a wall in the moving direction of the rotating disk in the mortar, and the rear side and / or front side wall surface of the upper collar facing the wall The shape of the mortar is slightly expanded in the advancing direction side so that is formed.

  Here, the shape of the mortar is preferably a shape other than a perfect circle.

  Further, the shape of the mortar may be formed with a notch from a part of the outer periphery toward the center point, and the notch may be disposed on the rear end side of the mortar and the upper punch in the traveling direction.

  Furthermore, at the opening end face of the mortar, at least the rear side and / or the front side in the traveling direction may be tapered to expand toward the opening.

  The tablet manufacturing method according to the present invention is to manufacture a tablet having a substantially C-shaped cross section for manufacturing a tablet in which a notch from a part of the outer periphery toward the center point is formed by the rotary powder compression molding machine described above. It is characterized by.

  According to the rotary powder compression molding machine according to the present invention, when a tablet of a deformed tablet other than a perfect circle is compression molded, the contact between the die and the upper punch can be suppressed as much as possible.

  Therefore, the inner surface of the die is not damaged or broken by the collision with the pestle.

  Further, the foreign matter is not mixed with the solid powder.

  Furthermore, a substantially C-shaped tablet can be effectively produced in an appropriate shape by such a compression molding machine.

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

  FIG. 1 shows a rotary disk 20 of a rotary powder compressor for producing tablets as an example of a rotary powder compression molding machine. FIG. 2 shows a tablet 10 compressed and molded in a die 22 of the rotary disk 20. It is shown.

  The tablet 10 is substantially C-shaped, and has a shape in which the powder material loaded in the die is pressed into a flat plate shape from both sides. That is, the tablet 10 has a tip that has a curved shape on both sides with a missing portion 12 corresponding to a notch from a portion of the outer periphery toward the center point, since a portion of the circle is missing in a substantially U shape. The protrusions 18 and 19 are arranged symmetrically. At this time, the notch 12 has a notch extending from the outer periphery of the circle of the tablet 10 in parallel toward the center point, and is slightly deeper than the center point of the circle.

On the other hand, as shown in FIG. 1, the turntable 20 includes a table-shaped mortar mounting plate portion 24, an upper heel holding plate portion 26 disposed above and below the mortar mounting plate portion 24, and a lower heel holding plate. These are integrated by a central shaft portion 29 and, for example, are integrally rotated in the arrow direction Y.

  On the upper surface of the mortar mounting plate portion 24, a mortar 22 formed as a concentric separate member is mounted at predetermined intervals. Then, a powder material is filled in the recess 40 of the mortar 22, and a lower punch (not shown) arranged below and an upper punch 30 arranged above are slid in the vertical direction. The substantially C-shaped tablet 10 shown in FIG.

  In other words, the upper holder hole 34 is formed with an upper holder hole 34 penetrating at the same pitch as the die 22, and the upper holder 30 is slidably accommodated in the holder hole 34 from above.

  Similarly, a lower holder hole is formed in the lower collar holding plate portion 28 so that a lower collar 70 as shown in FIG. 5 is slidably received from below in the holder hole.

  On the other hand, as shown in FIGS. 3 (A) and 3 (B), the upper collar 30 has a tip portion 30b having a substantially C-shaped cross section protruding from the tip of the shaft portion 30a. A head portion 30c having a diameter larger than that of the shaft portion 30a and being like an abacus ball is provided at the end portion. And the end surface of the tip part 30b of the upper punch 30 is formed in substantially the same shape as the mortar 22 when viewed from the front, as shown in FIG. It is said that. The upper collar 30 is actually composed of two members, and the inner member and the outer member are detachably integrated by the key 72, and the upper collar 30 is defined in one direction with respect to the holder hole 34. And is configured to be attached and detached. 5 is also formed in substantially the same manner as the upper collar 30.

  For example, the upper pressure roll 16 as shown in FIG. 7 is brought into pressure contact with the head 30c of the upper collar 30 formed in this way, and thereby slides in the upper holder hole 34 at a predetermined timing. It is configured as follows.

  FIG. 4 shows the characteristic part of the present invention, and shows the positional relationship between the recess 40 and the upper eyelid 34 as if looking into the inside of the die 22.

  As shown in FIG. 4, the substantially C-shaped recess 40 of the mortar 22 has portions corresponding to the protrusions 18 and 19 in the traveling direction with respect to the traveling direction of the rotary disk 20 indicated by the arrow Y. It is arranged on the rear side that is opposite.

In this embodiment, large clearances S ₁ , S ₂ , and S ₃ are secured on the rear side in the traveling direction between the recess 40 of the mortar 22 and the upper jaw 34. In addition, the gap t on the front side with respect to the traveling direction is set to be substantially the same as the surrounding gap u.

Here, “the portion where the rear side and / or the front side becomes a wall in the direction of travel in the mortar” refers to the clearances S ₁ , S ₂ , S ₃ of the mortar 22 on the rear side in FIG. Indicates the inner surface facing the front side. In other words, F ₁ located on the opposite side of the upper collar 34 from the arrow Y side.
, F ₂ and F ₃ .

As described above, in this embodiment, the large clearances S ₁ and S ₂ are arranged on the rear side in the traveling direction.
, S ₃ are formed. That is, the mortar 22 has the tips of the protrusions 18 and 19 of the tablet 10,
A portion corresponding to the center of the defect portion 12 is formed to be slightly expanded outward, and is formed to be larger than the product shape. The widths of the clearances S ₁ , S ₂ , S ₃ between the mortar 22 and the upper jaw 34 are as follows:
Although it varies depending on the product dimensions, it is preferable to secure about 2 to 4 times the other gap t.

Depending on the shape of the tablet 10, clearance may be provided only on the gap t side corresponding to the front surface in the traveling direction Y, and clearance may be provided on both the front surface gap t side and the rear surface on the F ₁ , F ₂ , and F ₃ sides. Also good.

  Thus, in this embodiment, for example, as shown in FIG. 5, when the upper punch 30 is inserted into the recess 40 of the mortar 22, the rear wall surface that is the opposite side in the traveling direction Y Since a large clearance S is ensured in the portion, the inner wall surface of the die 22 is not rubbed by the sliding of the upper punch 30. That is, the upper collar 30 moves downward by pushing the head 30 c with the upper pressure roll 16 and enters the recess 40 of the die 22. At this time, the movement in the sliding direction Z1 during pressurization shown in FIG. 5 in relation to the upper pressurizing roll 16 results in a slightly inclined state, but a clearance S is formed on the rear end side in the traveling direction Y. The tip 30b of the upper punch 30 can be slid without contacting the inner wall surface of the mortar 22. Further, even in the movement in the sliding direction Z2 at the time of pressure removal, the clearance S can surely slide. Further, if a taper 62 is provided on the entire circumference of the opening end face facing the recess 40 of the mortar 22, the sliding of the upper punch 30 or the lower punch 70 becomes inclined movements Z1 and Z2, and accordingly, It is possible to prevent the peripheral wall portion of the tip portion 30b of the upper punch 30 from coming into contact with the open end, and it is possible to more effectively prevent contact with the die 22. The taper 62 may be formed at least on either the front side or the rear side in the traveling direction of the opening end of the recess 40.

  In the above description, the upper collar 30 has been described in particular. However, it is preferable to adopt the same configuration for the lower collar 70 as a matter of course.

  Therefore, by providing such a clearance S on the rear end side in the traveling direction, the mortar 22 and the scissors 30 and 70 collide particularly when manufacturing a tablet of a deformed tablet that is not a perfect circle. Can be prevented.

  Therefore, the destruction of the mortar 22, the destruction of the rods 30 and 70, and the metal pieces generated by rubbing are not mixed into the product.

  As mentioned above, although one Example of this invention was described, this invention is not limited to the said Example at all.

  For example, in the above embodiment, a substantially C-shaped tablet as shown in FIG. 2 is shown as the product shape, but instead of this, a triangular shape or a triangular shape as shown in FIG. The product shape may be provided with a U-shaped defect portion 12 or the like, and the shape of the product is not limited at all. In short, any shape other than a perfect circle can be effectively implemented.

  Moreover, the tablet manufactured in the said Example is applicable also to solid confectionery etc. other than a chemical | medical agent.

FIG. 1 is a partial perspective view of a rotating disk employed in a rotary powder compression molding machine according to an embodiment of the present invention. FIG. 2 is a perspective view of a tablet manufactured by a rotary powder compression molding machine using the rotary disk of FIG. FIG. 3A is a top view of the upper eyelid adopted in the embodiment, and FIG. 3B is a front view thereof. FIG. 4 is a schematic view showing the relationship between the mortar and the upper punch. FIG. 5 is a schematic sectional view when an upper punch and a lower punch are inserted into the mortar and the powder material is pressed and solidified. FIG. 6 is a plan view of another shaped deformed tablet. FIG. 7 is a sectional view of a conventional rotary powder compression molding machine.

Explanation of symbols

10 tablets 12 defect 20 turntable 22 die 30 the upper punches 34 the upper holder hole _{S, S 1, S 2,} S 3 Clearance 70 lower punch

Claims (5)

By sliding the upper punch from the upper side and the lower punch from the lower side in the direction approaching each other through the upper punch holder hole and the lower holder hole with respect to the die provided on the rotating disk, A rotary powder compression molding machine that compresses and molds the loaded powder into a predetermined shape,
A clearance larger than the other portions is formed on a portion of the mortar in which the rear side and / or front side is a wall and a rear side and / or front side wall surface of the upper face facing the wall. Thus, the rotary powder compression molding machine characterized in that the shape of the die is slightly expanded in the traveling direction.   The rotary powder compression molding machine according to claim 1, wherein the shape of the mortar is a shape other than a perfect circle.   The shape of the mortar is characterized in that a notch is formed from a part of the outer periphery toward the center point, and the notch is arranged on the rear end side of the mortar and the upper punch in the traveling direction. The rotary powder compression molding machine according to claim 1 or 2.   4. The rotary powder compression molding machine according to claim 1, wherein at least a rear side and / or a front side in the traveling direction of the mortar opening end surface is tapered toward the opening. 5.   A method for producing a tablet, comprising producing a tablet having a notch from a part of the outer periphery toward a center point by the rotary powder compression molding machine according to claim 1 or 2.