JPH072158Y2 - Upper punch dust preventer in rotary powder molding machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to an upper punch dustproof device in a rotary powder molding machine.

Rotary powder molding machines can be used for pharmaceuticals, foods, agricultural chemicals, electrical parts,
It is a machine that manufactures molded products in the shape of tablets such as chemicals.

[Conventional technology]

Conventionally, as an upper punch dust preventer in a rotary powder molding machine of this type, a lower end of a bellows type dust protector made of an elastic material that can expand and contract in an annular groove provided between a sliding portion of the upper punch and a punch portion. Some of them are characterized in that the opening edge is fitted and the upper opening edge of the dust proof is elastically ejected to the lower end surface of the upper punch holding plate which slidably holds the upper punch. 55-41439), and also has a fitting hole at approximately the center and is fitted into the annular groove provided in the lower part of the upper punch that is slidably inserted into the upper punch mounting flange of the rotating disk. A bottom lid fitted by fitting the holes, and a bellows-like tube made of an elastic material which is provided by elastically abutting both upper and lower opening edges on the upper surface of the bottom lid and the lower surface of the upper punch attachment collar. A body (see Japanese Utility Model Laid-Open No. 62-165100), and an annular groove provided in the lower part of the upper punch, which is slidably inserted into the upper punch attachment flange of the rotary disc, A bellows type dust proof device made of elastic material that can be contracted is fitted into the lower end opening, and a support ring through which the upper pestle is inserted is inserted between the upper opening edge of the dust proof device and the lower face of the upper punch attachment collar. At the same time, the support ring is formed of a highly slippery material, and the frictional resistance between the upper surface of the ring and the lower surface of the upper punch mounting collar is determined by the lower surface of the support ring and the upper opening edge of the dust protector. Characterized by being smaller than the frictional resistance between the two (Actual Kaihei 2-7669
No. 7) is known.

[Problems to be solved by the device]

In any of those described in the prior art, the bellows type dust protector or the upper end opening edge of the cylinder is in contact with the lower end surface of the upper punch holding plate, etc., and the dust protector is activated by the upper punch moving up and down. Alternatively, the cylinder body is designed to repel and shrink, and the dust protector or the cylinder body is designed to rotate between itself and the upper punch holding plate by the rotation of the upper punch. The container or the cylinder sometimes had a problem of falling off.

The present invention has been made in view of the above problems of the prior art, and an object thereof is a rotary powder molding in which a dust protector is prevented from falling off due to vertical movement and rotation of an upper punch. It is intended to provide an upper punch dustproof device in a machine.

[Means for Solving the Problems]

In order to achieve the above-mentioned object, the present invention is a cylinder comprising a bellows made of a stretchable elastic material surrounding a sliding portion of an upper punch, and a dust-proof seal which is slidably contacted with the outer periphery of the sliding portion and is connected to the upper end of the bellows. A dustproof device in the form of a ring, and an annular deep groove provided between the sliding part of the upper punch and the punch part is fitted with the lower end opening edge of the dustproof device, and the dustproof seal, Rotating powder molding characterized by being fitted and fixed in a seal groove at the lower end of an upper punch holding plate that slidably holds the upper punch so as to prevent the dustproof device from falling off when the upper punch is moved up and down. To provide an upper punch dustproof device in a machine.

And, it is preferable to provide a gap between the lower end opening edge of the dustproof device fitted in the annular deep groove and the annular deep groove.

Further, the seal groove at the lower end of the upper punch holding plate may be provided with a hole communicating with the outside.

[Action]

The dust proof device comprises a bellows bellows made of an elastic material that surrounds the sliding portion of the upper punch, and a dust proof seal slidably contacting the outer periphery of the sliding portion is connected to the upper end of the bellows.

Therefore, when the upper end portion, that is, the dustproof seal is fitted and fixed in the seal groove at the lower end of the upper punch holding plate, the dustproof device is prevented from dropping by the vertical movement and rotation of the upper punch.

The air inside and outside the dust proof device can flow between the bottom edge of the dust proof and the annular deep groove when the dust proof device contracts and extends. With the provision of, the air can be more easily circulated.

The dust-proof seal of the dust-proof device not only prevents the dust-proof device from falling off as described above, but also prevents oil and powder from falling at the sliding portion of the upper punch.

The bellows of the dust proof device act to prevent the upper punch of the powder floating in the air from adhering to the sliding portion.

If a hole is formed in the seal groove at the lower end of the upper punch holding plate that communicates with the outside, insert a push rod through this hole,
The dustproof seal fitted in the seal groove can be easily removed.

〔Example〕

 Examples will be described with reference to the drawings.

1 to 3, the dust protector 7 is mounted on the upper end of an expandable elastic bellows 5 surrounding the sliding portion 2 of the upper punch 1 as shown in FIG. It has a cylindrical shape in which a dustproof seal 6 that is in sliding contact with the outer periphery of the moving portion 2 is continuously provided.

The lower end opening edge 8 of the dust protector 7 is fitted into the annular deep groove 4 provided between the sliding portion 2 of the upper punch 1 and the punch portion 3 with a gap 11.

On the other hand, the upper end of the dustproof device 7, that is, the dustproof seal 6
Is fitted and fixed in a seal groove 10 at the lower end of an upper punch holding plate 9 that slidably holds the upper punch 1.

The seal groove 10 has a hole 12 communicating with the outside.

In the drawings, 13 is a lower punch, 14 is a rotary disc, 15 is a molded product compression-molded by the upper punch 1 and the lower punch 13, and 16 is the rotary disc 14 described above.
Is a mortar arranged in the.

[Effect of device]

Since the present invention is configured as described above, it has the following effects.

In the upper punch dust preventer of the rotary powder molding machine according to claim 1, the upper end of the dust preventer, which is a combination of a bellows made of elastic material and a dust seal, is fitted into the seal groove at the lower end of the upper punch holding plate. Since it is fixed, it is possible to prevent the dust proof device from falling off due to the vertical movement and rotation of the upper pestle, and the above dust proof seal can prevent oil and powder from falling at the sliding portion of the upper pestle. The bellows can prevent the upper punch of the powder floating in the air from adhering to the sliding portion.

In the upper punch dust preventer of the rotary powder molding machine according to claim 2, since a gap is provided between the lower end opening edge of the dust protector fitted in the annular deep groove and the annular deep groove, the dust protector of the dust protector is provided. The air inside and outside can more easily flow when the dustproof device is contracted or expanded.

In the upper punch dust preventer of the rotary powder molding machine according to claim 3, the seal groove at the lower end of the upper punch holding plate is provided with a hole communicating with the outside. By inserting a push rod through the hole, the seal is provided. The dustproof seal fitted in the groove can be easily removed.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view of an essential part of an embodiment of the upper punch dust preventer in a rotary powder molding machine according to the present invention, and FIG. FIG. 3 is an enlarged view of the circle inside FIG. 1 ... Upper punch, 2 ... Sliding part, 3 ... Punch part, 4 ... Annular deep groove, 5 ... Bellows, 6 ... Dustproof seal, 7 ... Dustproofer, 8 ... Bottom opening edge, 9 …… Upper punch holding plate, 10 …… Seal groove, 11 …… Gap, 12 …… Drilling hole, 13 …… Lower punch, 14 …… Rotating plate, 15 …… Molded product, 16 …… Mill

Claims (3)

[Scope of utility model registration request] 1. A cylindrical shape comprising a bellows (5) made of a stretchable elastic material surrounding a sliding portion of an upper punch, and a dust-proof seal (6) slidably contacting the outer periphery of the sliding portion at the upper end of the bellows. Of the upper punch (1), and the dust protector (7) is provided in the annular deep groove (4) provided between the sliding part (2) and the punch part (3) of the upper punch (1). ) Of the upper punch holding plate (9) which fits the lower edge opening edge (8) and holds the dust proof seal (6) slidably on the upper punch (1). An upper punch dust preventer for a rotary powder molding machine, characterized in that the dust preventer (7) is prevented from falling off when the upper punch (1) is vertically moved. 2. A dust protector (7) fitted in the annular deep groove (4).
The upper punch dust preventer for a rotary powder molding machine according to claim 1, wherein a gap (11) is provided between a lower end opening edge (8) of said and said annular deep groove (4). 3. A seal groove (10) at the lower end of the upper punch holding plate (9)
The upper punch dustproof device in the rotary powder molding machine according to claim 1 or 2, wherein a hole (12) communicating with the outside is provided in the.