JP2000238135A - Apparatus for processing sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve an operation rate, mold precision, and clamping pressure uniformity by installing a carrying apparatus for moving a mold or a horn forward/backward to clamp overlapped raw sheets and a traveling apparatus which advances the clamped mold or horn and retracts the unclamped mold or horn. SOLUTION: After a raw sheet A is supplied to overlap with the upside of a mold 2, the cylinder 9 of a carrying apparatus 8 is extended to bring down a horn 4, and the sheet A is pressed to the surface of the mold 2. Ultrasonic vibration is transmitted to the horn 4, and contact places of the sheet A and the edge in the surface of the mold 2 are welded by frictional heat. After that, while the pressing of the sheet A and the transmission of ultrasonic vibration to the horn 4 are maintained, a traveling apparatus is operated to advance the sheet A together with the mold 2, and the welding by the frictional heat is implemented continuously between the sheet A and the stopped horn 4. The traveling apparatus makes a table 17 travel forward/backward intermittently by the numerical control of a motor 22.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for processing a thermoplastic plastic sheet (a sheet which can be welded by ultrasonic vibration transmission) or a sheet which can be welded at a predetermined position between the sheet and the nonwoven fabric. About.

[0002]

2. Description of the Related Art A thermoplastic plastic sheet (a sheet that can be welded by ultrasonic vibration transmission) is overlapped and a processing position (on a line) of the overlapped sheet is welded or cut off simultaneously with the welding (only the sheet is limited). not,
Ultrasonic waves are used as conventional processing.

[0003] As a processing method using ultrasonic waves, an overlapping sheet is interposed between a horn having an edge on one of the opposing surfaces and a receiver, and then at least one of the horn and the receiver is advanced. While the sheet is sandwiched between the horn and the receiving plate, the sheet is welded or welded and melted by ultrasonic vibration transmission from the horn under pressure.

[0004] The clamping pressure is released while retracting at least one of the horn and the receiving plate which are advanced after the above-mentioned welding or welding and fusing, and the processed sheet is taken out.

[0005]

According to the above-mentioned processing method, a fixed-size sheet is interposed between a horn and a receiving plate and processed under a clamping pressure, and then the clamping pressure is released to complete the processing. Since the sheet is taken out, there is a problem that the processing operation rate is significantly reduced and the cost is significantly increased.

Further, since the sheet is pressed on the surface of the mold and the horn having the same area or the horn side having a larger area than the mold side, it is necessary to uniformly press each part. The reason is that if there is a variation in the clamping pressure, there is a variation in the welding or welding and fusing of each part (which may cause poor welding or defective blowing).

[0007] Therefore, a high precision is required for the mold, and a high skill is required for uniform adjustment of each part of the pressing surface.

In particular, when the size of the mold is increased, a horn corresponding to the size of the mold is required. Therefore, there is a problem that the number of types of the horn increases and the cost increases.

Therefore, the present invention significantly improves the operation rate, and solves problems such as problems of mold accuracy, adjustment of uniform clamping pressure, and necessity of many horns having different clamping surface areas. It is an object of the present invention to provide a sheet processing apparatus which eliminates the need.

[0010]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention is directed to a mold having an edge on a surface, facing across the surface of the mold, and receiving vibration transmission from an ultrasonic oscillator. A horn provided as described above, an appropriate advancing / retracting device provided to advance or retreat one of the mold or the horn so as to squeeze the overlapped sheets to be processed with the mold and the horn, An appropriate traveling device provided so that either the mold or the horn is moved forward and retreated under the release of the clamping pressure is adopted.

Also, a rotating body provided in a roll shape and rotated to one side by an appropriate driving device, a mold having an edge on a surface provided on an outer periphery of the rotating body, and an axial center of the rotating body And a horn provided so as to receive vibration transmission from the ultrasonic oscillator, and one of the horn and the rotating body is moved back and forth so as to clamp a work sheet overlapped by the mold and the horn. In some cases, a configuration including an appropriate advancing / retreating device provided so as to perform the above-described operation may be employed.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In a first embodiment of the present invention,
As shown in FIGS. 1 to 4, a mold 2 having an edge 1 on its surface and an ultrasonic oscillator 3 traversing the surface of the mold 2.
The horn 4 provided to receive the vibration transmitted from the horn is disposed so as to face up and down.

The vibration is transmitted from the ultrasonic oscillator 3 to the horn 4 as shown in FIGS. 1, 3 and 4 by incorporating a vibrator 6 acting in conjunction with the operation of the ultrasonic oscillator 3 into a case 5, and A plate-like horn 4 as a tool is attached to a lower end of a shaft member 7 projecting downward from the lower end of the vibrator 6 to the case 5.
The upper edge is fixed.

Either the mold 2 or the horn 4 is moved up and down by the advance / retreat device 8, and an overlapping thermoplastic plastic sheet (welding by ultrasonic vibration transmission) interposed between the approaching mold 2 and the horn 4 is provided between them. (A possible sheet) and a sheet A to be processed made of a nonwoven fabric.

The above-mentioned lifting device 8 is, as shown in FIG.
The vibrator 6 is fixed to the piston rod 10 which rises and lowers by the action of the cylinder 9 on the top wall of the above, but the horn 4 may be fixed and the mold 2 may be movable.

Of course, the lifting device 8 is not limited to the above-described configuration, and may be raised and lowered by another method.

As shown in FIG. 3, a pillar 11 is erected on one side, and cut-off tubular bodies 12 provided on the upper and lower sides of the case 5 are fitted on the pillar 11 and a lever 11 is provided. If the tightening tool (not shown) comprising the bolt and the screw hole can be tightened and released by the operation of 13, the height position of the horn 4 can be freely adjusted.

Further, there is provided a traveling device 14 for moving either the mold 2 or the horn 4 forward under the pressure of the sheet A to be processed, and retreating under the release of the clamping pressure.

The traveling device 14 is provided on the mold 2 side in the case of the drawing, and the operation thereof is performed by two rails 16 provided on the substrate 15 and supporting the mold 2 on the upper surface (attached by a method such as bolting). A table 17, a slider 18 provided on the lower surface of the table 17 and engaged with the rail 16, a male screw 20 supported at both ends by bearings 19 at the front and rear ends on the substrate 15, A female screw 21 screwed into the male screw 20 and fixed to the table 17, a motor 22 mounted on the board 15, and a timing belt 24 laid over a timing pulley 23 provided on the output shaft of the motor 22 and the male screw 20. The table 17 is intermittently moved forward and backward by numerical control of the motor 22, and the table 17 after the forward end is moved backward to the original position. Forward with your hand or other method, it may be reverse travel.

The horn 4 side is movable, and the mold 2
The side can also be stationary.

In the figure, 31 is a guide member for raising and lowering the vibrator 6,
Reference numeral 32 denotes an elastic mat laid on the lower side of the mold 2, and the work sheet A
To prevent the leakage of the clamping pressure due to the influence of distortion or the like during the clamping.

With the above configuration, the sheet A to be processed is supplied so as to overlap the upper side of the mold 2.

Next, the work sheet A is pressed against the surface of the mold 2 while the horn 4 is lowered by extending the cylinder 9 of the advance / retreat device 8.

Then, as shown in FIG.
Then, the sheet A is pinched, and the sheet A is pressed against the edge 1. In this state, the ultrasonic vibration is transmitted to the horn 4.

Then, the contact portion of the sheet A to be processed with the edge 1 is welded by frictional heat.

While the pressing of the sheet A against the edge 1 and the transmission of the ultrasonic vibration to the horn 4 are maintained, the sheet A together with the mold 2 is moved by the operation of the traveling device 14 as shown in FIG. Run forward.

Then, the sheet A to be processed is moved together with the edge 1 with respect to the horn 4 stopped at the fixed position, so that welding by frictional heat is continuously processed.

When the end of the edge 1 reaches the horn 4, the transmission of the ultrasonic vibration is cut off, the cylinder 9 of the advance / retreat device 8 is contracted to raise the horn 4, and the traveling device 14 is operated to form the mold. 2 is moved backward as shown in FIG.

By repeating the above, the welding process is performed intermittently on the sheet A to be processed.

As shown in FIG. 4, the upper side of the table 17 is moved up and down by the action of the cylinder 41 so as to integrally and stably move the mold 2 and the work sheet A as shown in FIG. The movable holding plate 42 is provided with a fixed lower fixed holding plate 43, and the upper movable holding plate 45 which is raised and lowered by the action of a cylinder 44 above and below the sheet A to be processed on the substrate 15 in front of the table 17. Is provided with a stationary lower holding plate 46.

When the sheet A to be processed is held between the movable holding plate 42 and the fixed holding plate 43 when the table 17 moves forward, as shown in FIGS. Travels integrally, and when the table 17 is retracted, the work sheet A is sandwiched between the upper movable sandwiching plate 45 and the lower fixed sandwiching plate 46, and then the movable sandwiching plate 42 and the fixed sandwiching plate 43 Then, the table 17 is moved backward after the clamping of the sheet A to be processed is released (shown in FIG. 7). Then, the work sheet A can be stopped at the fixed position.

When a series of the above operations are input to a computer and numerically controlled, the efficiency of the processing is significantly improved.

Further, the sheet A to be processed is not limited to the illustrated roll winding, and a fixed-size sheet may be used.

Further, when the contact portion of the horn 4 with the sheet A to be processed is bulged in an arc shape between the front and rear as shown in the figure, the slip of the sheet A to be processed with respect to the horn 4 is improved.

Of course, when the mold 2 is run under the clamping pressure, the mold 2
As a result, the work sheet A under the clamping pressure travels integrally.

When the edge 1 is set as shown in FIGS. 8 and 9, welding and fusing can be performed simultaneously, and as shown in FIG. It becomes possible to extract the product a.

It should be noted that welding, welding, and fusing in a direction intersecting (eg, perpendicular to) the running direction of the work sheet A with respect to welding, welding, and fusing along the running direction of the work sheet A are performed by the mold 2. The traveling with the sheet A to be processed is temporarily stopped, or the traveling speed is reduced so that the processing in the traveling direction and the direction intersecting the traveling direction is made uniform (the welding strength). This means controls the traveling speed of the mold 2 by, for example, numerical control.

As means other than the above, the amplitude of the ultrasonic wave can be adjusted. Further, the molds 2 may be arranged on the table 17 in order.

In the second embodiment of the present invention, a roll-shaped rotating body 51 shown in FIG.

The drive device 52 is driven by a sprocket of a motor (not shown) and a chain 54 extending over a sprocket 53 of an axis of a rotating body 51. However, other means may be used. .

A mold 2 having an edge 1 similar to that of the first embodiment is attached to the outer peripheral surface of the rotating body 51 (by bolting or the like).

The surface of the mold 2 is concentric like the rotating body 51.

Further, on the outer periphery of the rotating body 51, a horn 4 which advances and retreats (vertically in FIG. 12) by an advancing and retreating device (not shown) similar to that of the first embodiment is arranged along the axis of the rotating body 51. Is provided.

With the above configuration, the horn 4 and the mold 2
Then, the work sheet A is inserted, and then the horn 4 is lowered, and the work sheet A is sandwiched between the horn 4 and the mold 2. Under this pinching pressure, the rotating body 51 is rotated in the direction of the arrow in FIG. 12 and the ultrasonic vibration is transmitted to the horn 4.

Then, as in the first embodiment, the contact portion of the edge 1 is welded to the sheet A to be processed by frictional heat.

Of course, fusing can be performed, and sheets A to be processed are sequentially processed.

As shown in the figure, when the upper and lower feed rollers 55 sandwiching the work sheet A are driven by a known driving device 56, the work sheet A can be stably fed.

Also, as in the first embodiment, the rotating body 51
The rotation of the motor is stopped or decelerated, or the amplitude of the ultrasonic wave is adjusted to achieve uniform welding, welding, and fusing of each part.

[0049]

Since the sheet processing apparatus of the present invention is constructed as described above, welding, welding, and fusing of a sheet to be processed can be performed extremely efficiently, and the operation rate can be significantly improved. . In addition, since the horn is in partial contact with the mold, various inconveniences caused by bringing the horn into full contact with the mold (pressing the sheet over the entire surface of the mold at once) can be eliminated.

[Brief description of the drawings]

FIG. 1 is a side view showing a first embodiment of the present invention.

FIG. 2 is a cutaway plan view of the same part.

FIG. 3 is a front view of a cutaway of the same part.

FIG. 4 is a longitudinal sectional side view showing a main part.

[Fig. 5] Processing action diagram

[Fig. 6] Processing action diagram

[FIG. 7] Processing action diagram

FIG. 8 is a longitudinal enlarged side view of the processing action.

FIG. 9 is an enlarged longitudinal side view of the processing action.

[FIG. 10] A longitudinally enlarged front view of the processing action.

FIG. 11 is a plan view of a processed product.

FIG. 12 is a side view showing a main part of the second embodiment.

[Explanation of symbols]

 A Worked sheet 1 edge 2 type 3 ultrasonic oscillator 4 horn 5 case 6 vibrator 7 shaft material 8 advance / retreat device 9 cylinder 10 piston rod 14 traveling device 15 substrate 16 rail 17 table 18 slider 19 bearing 20 male screw 21 female screw 22 Motor 23 Pulley 24 Belt 51 Rotating body

Claims (2)

[Claims] 1. A mold having an edge on a surface, a horn opposed across the surface of the mold and provided to receive vibration transmission from an ultrasonic oscillator, and a horn overlapped by the mold and the horn. An appropriate advancing / retreating device provided so as to advance or retreat one of the mold or the horn so as to squeeze the processed sheet, and one of the dies or the horn is advanced under the squeezing of the sheet, and A sheet processing device comprising an appropriate traveling device provided to retreat; 2. A rotating body provided in a roll shape and rotated to one side by an appropriate driving device, a mold having an edge on a surface provided on an outer periphery of the rotating body, and a shaft center of the rotating body. And a horn provided so as to receive vibration transmission from the ultrasonic oscillator, and one of the horn and the rotating body is moved back and forth so as to clamp a work sheet overlapped by the mold and the horn. A sheet processing apparatus comprising an appropriate advance / retreat device provided to cause the sheet to move.