JPS6115694B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a compression molding machine for internal sanitary product tampons. In particular, it relates to a tampon compression molding machine suitable for continuous mass production of tampons.

Conventional tampon forming equipment uses a fabric feeder to feed raw fabric, which is the raw material for tampons, to a fixed forming head, compresses it into a tampon shape at the forming head, and then discharges the formed tampon using a tampon ejector. was.

This tampon molding requires a compressive force that does not recover even if the pressure of the molding machine is removed, so the tampon compression molding process requires a lot of time in the tampon manufacturing process. In particular, as the throughput of other processes such as the packaging process has recently improved, the throughput of the tampon compression molding process has been relatively lower compared to other processes.

For this reason, measures have been taken to introduce a large number of molding heads into the compression molding process, but since conventional molding heads are fixed, each molding head requires a fabric feeder and tampon ejector, and This method has the drawbacks of increasing equipment costs for the molding process, requiring a very large area, and increasing the number of workers operating the machine.

The present invention solves these drawbacks by (a) rapidly, automatically and continuously performing compression molding work, which was conventionally performed intermittently using a large number of molding heads, and (b) allowing for wide-ranging work. The purpose of the present invention is to provide a tampon compression molding machine that does not require space and (c) can be manufactured with a small number of workers.

The present invention includes a fixed first cam, a rotary that is coaxial with the cam and rotationally driven, a plurality of molding heads arranged on the rotary, and a molding head that follows the undulations of the first cam. A cam follower provided for each molding head, a second cam provided in the molding head and connected to the cam follower, and a second cam provided in the molding head and connected to the compression molding section in the center of the molding head The present invention is characterized in that it includes a slider that slides back and forth toward the user, and a compression plate that is interlocked with the slider and that compresses and molds the original fabric whose tip end has inserted the compression molding section.

It is preferable that the first cam has a disk-shaped outer peripheral surface with undulations, and the second cam has a ring-shaped inner peripheral surface with undulations. Further, it is preferable to provide a heater near the compression molding section. Preferably, four compression plates are provided for each forming head. Furthermore, it is preferred that the number of molding heads is 10 to 24.

Next, the present invention will be explained in more detail by way of examples based on the drawings.

FIG. 1 is an overall configuration diagram of a molding machine according to an embodiment of the present invention.

In the figure, 1 is a tampon molding head, and 2 is a rotary. A rotary 2 equipped with 16 tampon molding heads 1 is driven to rotate clockwise as indicated by an arrow X around a rotary central shaft 3. Coaxially with this rotary center shaft 3, the center of a fixed first cam 4 that does not rotate is provided. The first cam 4 has a disk shape having a diameter smaller than that of the rotary 2, and has a recessed portion on the outer periphery, which is the cam surface, over about 1/4 of the circumference.

Further, following the ups and downs of the first cam 4, a cam follower 5 is provided for each molding head. Further, a compression molding section 6 is provided at the center of the molding head for compression molding the raw material of the tampon.

The tampon compression molding process is repeated one cycle each time the rotary 2 rotates once in the X direction. The operation of the tampon forming head 1 changes depending on the conditions of the rotary 2 and the cam surface of the first cam 4. That is, when the cam surface of the first cam 4 is in a convex state, the forming head 1 compresses the raw material to be used as a tampon;
If the cam surface is in a concave state, the original fabric is uncompressed.

The cam surface is concave over approximately 1/4 of the circumference from point P to point S shown in FIG. 1, and the other portion is continuously convex. Point R is the point at which the original fabric to be used as a tampon is inserted into the compression molding section 6 of the molding head 1. As the rotary 2 rotates in the direction of arrow X, the forming head 1 mounted on the rotary 2 also rotates in the same direction, so that compression of the original fabric starts from the position of point S.

Thereafter, the forming head 1 follows the convex cam surface of the first cam 4 via the cam follower 5 and continues to rotate while compressing the original fabric. rotary 2
The compression process is finished at the position of point P, and then the compression-molded product is discharged at the position of point Q, and the molding and compression process is finished.

FIG. 2 is an enlarged cross-sectional view of the forming head 1 and the cam follower 5 surrounded by the dashed line in FIG.
The A-A′ vertical cross-sectional view of this FIG. 2 is FIG. 3,
FIG. 2 is a cross-sectional view taken along line B-B' in FIG.

In both figures, the forming head 1 mainly includes a ring-shaped second cam 7 and a cam 4 inscribed in the cam surface.
The rotor 8 includes four sliders 10 that lock the shaft 9 of the rotor 8, and four guides 12 that form the sliding surfaces of the sliders 10.

The molding head 1 is also provided with four rotors 13 and their shafts 14. The base end of this shaft 14 is fixed to the rotary 2. Also the second cam 7
A protruding portion 17 for fixing the rotating shaft 15 of the cam follower 5 is provided in a part of the cam follower 5 so as to be fixed to the outer circumferential surface of the second cam 7 . This rotating shaft 15 is connected to one of the shafts 14 by two coil springs 18.

Furthermore, the cam surface of the second cam 7 in which the rotor 8 is inscribed is eccentrically formed by 1/4 circumference, and the slider 1
0 is adapted to slide by the rotation of the second cam 7. Further, a compression plate 19 is fixed to the slider 10 on the opposite side of the slider 10 to the slider 10 so as to be interlocked with the slider 10.

FIG. 4 is a perspective view showing the tip of the compression plate 19 of this embodiment. The cross section of the tip of the compression plate 19 forms a concave surface of 1/4 circumference. In this example, 4 compression plates 1
The tip of 9 forms the compression molded part 6 of the tampon. Ideally, a large number of compression plates 19 should be provided in order to suppress the tendency of a compression-molded tampon to swell during use and return to its pre-compression shape. Since the compression molding mechanism becomes too complicated, it is preferable to use four pieces that can maintain a substantially circular cross section even after swelling.

On the other hand, as shown in FIG. 3, a frame 22 is provided at the distal end of the shaft 14, and a frame 23 is provided at the proximal end. These two frames 22 and 23 fix a support section 25 from above and below via a heat insulating material 24, and this support section 25 holds the slider 10 and guide 12 from above and below. A funnel-shaped tapered guide 27 for inserting the original tampon fabric into the compression molding section 6 is provided at the upper part of the support section 25 . Further, a tube 28 is provided at the lower part of the support portion 25, through which a compression-molded tampon is discharged.

Furthermore, inside the guide 12 is a spring 29 that always presses the slider 10 against the cam surface of the second cam 7.
and a heater 30 that speeds up the compression molding of the original fabric. Further, this heater 30 is supplied with electricity via an electric wire 32 by a contact rotor (not shown) that is in rotational contact with the upper part of the support portion 25 .

The heat insulating material 24 transfers heat from the heater 30 to the frame 2.
2 and 23 and prevent heat from being radiated through the slider 10, the guide 12, and the support part 25.
It is designed to absorb distortion caused by thermal expansion.

With such a configuration, the rotary 2 is rotationally driven. At position R, where the first cam 4 in FIG. 1 is in a concave state, the original fabric is inserted into the compression molding section 6 of the forming head 1 through the tapered guide 27 by the original fabric feeder. This insertion method is performed by automatically pushing the original fabric using a rod-shaped tool of an original fabric feeder (not shown).

When the rotary 2 further continues to rotate and moves to the S position where the first cam 4 is in a convex state, the rotation shaft 15 of the cam follower 5 provided in the forming head 1 is rotated by the coil spring, as shown in FIG. 18, the second cam 7 moves away from the shaft 14 connected by arrow Y.
Rotate in the direction of. At this time, the slider 10 moves along the sliding surface of the guide 12 via the trochanter 8 toward the compression molding section 6 into which the original fabric is pushed. Therefore, the tip of the compression plate 19 is
In conjunction with this, the original fabric is compression molded.

At this time, the temperature of the heater 30 is maintained at about 180° C. to the extent that the raw fabric does not undergo thermal deterioration, and a compressive force of about 100 Kg/cm ² is applied to the raw fabric. In this state, the molding head 1 on the rotary 2 rotates while compression molding the original fabric, and reaches position P approximately 8 seconds after the start of compression molding at the position S in FIG.

When moving to this position P, this forming head 1
The rotation shaft 15 of the cam follower 5 is connected to the coil spring 1
8, the second cam 7 rotates in the opposite direction to the arrow Y. At this time, slider 1
Since the spring 29 of 0 presses the trochanter 8 against the cam surface of the second cam 7, the slider 10 presses the cam surface of the second cam 7.
The compression plate 19 moves in the direction opposite to the direction of , and releases the compression molded original fabric from compression.

Next, when the forming head 1 moves to the position Q, a product discharge device (not shown) pushes the compression-molded original fabric from above with a rod and takes out the original fabric through the tube 28.

In the above description, a single forming head and cam follower have been described, but other forming heads and cam followers mounted on the rotary 2 similarly operate at predetermined positions. In addition, although the cam surface of the first cam 4 has a disk-shaped outer peripheral surface with undulations, and the second cam 7 has a ring-shaped inner peripheral surface with undulations, the cam surfaces of both is not limited to either the outer peripheral surface or the inner peripheral surface. Further, although an example has been shown in which the heater 30 is provided near the compression molding section 6, it may not be provided depending on the physical properties of the raw fabric. Further, the number of sliders 10, the number of compression plates 19 interlocked therewith, and the number of molding heads 1 are not limited to the above example. The number of forming heads 1 can be determined by considering the rotational speed of the rotary 2, supply and discharge of the original fabric, time required for compression molding of the original fabric, and the like.

As described above, according to the present invention, by mounting a plurality of molding heads on a rotary and utilizing cams and cam followers, (a) compression molding of tampons can be performed quickly and automatically;
(b) Only one set of fabric feeder and product discharge device is required for each of multiple forming heads, eliminating the need for a large working space; (c) No wasted time for compression molding of fabric. (d) An excellent tampon compression molding machine can be obtained that can perform everything from supplying raw material to discharging the compression molded product with an extremely small number of people.

[Brief explanation of the drawing]

FIG. 1 is an overall configuration diagram of a molding machine according to an embodiment of the present invention. FIG. 2 is a cross-sectional view taken along line B-B' in FIG. 3 of the same molding head. FIG. 3 is a vertical sectional view taken along line A-A' in FIG. 2 of the same molding head.
FIG. 4 is a perspective view of the compression plate. 1... Tampon molding head, 2... Rotary,
3... Rotary center shaft, 4... First cam, 5...
... Cam follower, 6 ... Compression molded part, 7 ... Second cam, 8 ... Trochanter, 9 ... Shaft, 10 ... Slider, 12 ... Guide, 13 ... Rotor, 14 ...
Shaft, 15...Rotating shaft, 17...Protrusion, 18...
Coil spring, 19... Compression plate, 22, 23... Frame, 24... Heat insulating material, 25... Support part, 27
...Tapered guide, 28...Tube, 29...
...Spring, 30...Heater, 32...Electric wire.

Claims (1)

[Claims] 1. A fixed first cam, a rotary coaxial with the cam and rotationally driven, a plurality of molding heads disposed on the rotary, and undulations of the first cam. a cam follower provided in each of the forming heads; a second cam provided in the forming head and connected to the cam follower; A tampon compression molding machine comprising: a slider that slides back and forth toward a molding section; and a compression plate that is interlocked with the slider and compresses and molds a raw fabric whose tip end is inserted into the compression molding section. 2. The tampon compression molding according to claim 1, wherein the first cam has a disc-shaped outer peripheral surface with undulations, and the second cam has a ring-shaped inner peripheral surface with undulations. Machine. 3. The tampon compression molding machine according to claim 1, further comprising a heater near the compression molding section. 4. The tampon compression molding machine according to claim 1, wherein each molding head is provided with four compression plates. 5. The tampon compression molding machine according to claim 1, characterized in that the number of molding heads is 10 to 24.