JPH04338527A - Product separating device for high frequency processing machine for processing product at every interval of belt-shaped material - Google Patents

Abstract

PURPOSE:To provide a device for separating securely a product from a belt- shaped material in conformity with the processing cycle of a high frequency processing device for intermittent feeding, in a high frequency processing machine for processing a product on a belt-shaped thermoplastic material at every given interval, particularly for separating securely the product and the sections other than the product even for a thin, weak belt-shaped material and discharging securely the belt-shaped material from which the product is separated. CONSTITUTION:A first clamp 6 for pressing a product portion, or the first clamp 6 and a second clamp 7 for said purpose, and a moving roller 8 for peeling off the sections other than the product in the state of being pressed by the clamps are provided. Said moving roller 8 is moved forward correspondingly to the moving speed when the belt-shaped material is moved forward, while the product and the sections other than the product are peeled off while moving backward when the belt-shaped material is stopped.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] In a high-frequency processing machine using high-frequency dielectric heating, as shown in Fig. 5, a plurality of strips 1, 1 made of thermoplastic synthetic resin as raw materials are superimposed, and a lower electrode (surface plate) 2 is used. It is known that a product A such as a bag or a card holder is produced by welding a belt-shaped object into a certain shape at regular intervals using an upper electrode (mold) 3 and an upper electrode (mold) 3. The present invention relates to a high-frequency processing machine that processes products at regular intervals of the above-mentioned strip-like material, and more specifically, to a device for separating processed products A from non-product parts B, so-called punched scraps. .

0002

BACKGROUND OF THE INVENTION Conventionally, it has been known to bend a processed belt-like product using a hard synthetic resin material as a raw material, and to separate the product from the belt-like product using its own elasticity. However, in the case of products made from soft synthetic resin materials, the products cannot be easily separated from the strip, so the reality is that each product must be extracted manually.

In order to improve the above-mentioned conventional technology, the present inventors have developed a device (patent application) which presses the product part of a strip with a clamp and in this state winds up the strip from which the product has been separated, so-called punched waste. Hei 2-166519). In this invention, the product part is pressed and fixed by a clamp, and the strip is wound up twice the feed pitch dimension, and when the strip is fed out in the manufacturing cycle, it is unwound by the feed pitch dimension. In other words, the device for winding up the strip from which the product has been separated alternates between winding and unwinding.

0004

[Problem to be Solved by the Invention] When heating a belt-shaped synthetic resin material in a fixed shape at regular intervals, as shown in FIG. Then, process the product so that it is separated from the strip as much as possible. However, the product is not completely divided around the entire circumference, and a part of the product is a continuous part 1a of thin film.
It becomes connected. Particularly, when the strip is made of a soft synthetic resin material, it is not easy to separate the product from the parts other than the product from the strip.

[0005] In the invention related to the previous application of the present inventors, if the strip-like object to be processed is relatively strong, that is, the strip-like object from which the product is separated is strong, the purpose is completely satisfied. can be reached. However, when the thickness of the strip is thin, for example when manufacturing bags from very thin vinyl chloride sheets, the strength of the strip from which the product has been separated is weak, making it difficult to wind up and unwind using a winding device. When repeating this process, there was a possibility that the strips would get tangled or be cut.

[0006] In view of these points, the present invention reliably separates the product from the processed strip at regular intervals of the strip, and eliminates the strip from which the product has been separated, so-called punched waste, without any problem. The purpose is to obtain a separation device that can In particular, even if the workpiece is a weak material such as a thin vinyl sheet, the work will not be interrupted due to the separation of the workpiece from the product or from being cut or tangled. The purpose is to obtain a device.

[0007]

[Means for solving the problem] A strip 1 is sent out intermittently in constant size portions, an insulating belt 4 is interposed between the lower electrode 2
In a high-frequency processing machine that processes products at regular intervals on a strip-shaped object using an upper electrode 3 and a clamp, the present invention includes a clamp that presses the product part of the strip-shaped object after processing, and a product A that is pressed by the clamp. A moving roller 8 is provided for peeling off the separated strip B. The moving roller 8 moves the belt-shaped object 1
When the strip is sent forward, it moves forward by the distance it is fed, and when the product A part is pressed by the clamp when stopped, it moves back while peeling off the parts of the strip other than the product. The strip B from which the product A has been separated by the moving roller 8 is wound around a dancer roller 12 around a winding device 13 at a fixed position. Alternatively, it is wound up by a winding device 15 that moves together with the moving roller 8.

[0008]

[Operation] Because the strip 1 is heated by the upper electrode 3 and the lower electrode 2, it is sent forward intermittently in each processing cycle while being partially attached to the insulating belt 4. In the flow of the belt-shaped object 1 processed by this intermittent feeding, when the belt-shaped object is sent forward, the moving roller 8 moves forward as the belt-shaped object is fed forward. In the processed strip, the product A and the other parts are connected by a thin continuous part 1a of the film.

[0009] When the flow of the strip is stopped, the product A portion is pressed by the clamp, and while the moving roller is moved backward, the portion of the strip other than the product is pulled by the moving roller at approximately the same speed as the moving speed. As the strips are peeled off, the products are successively separated from each other while maintaining a substantially constant angle with the products on the insulating belt 4, as shown by α in FIG. The products separated from the strip are placed on an insulating belt and are sequentially sent to the destination.

When the strip 1 is sent forward according to the processing cycle, the moving roller 8, which had been moving backward, moves forward again. At this time, there is no need to rewind from the moving roller the strip B from which the previously wound product was separated, and the relative positional relationship of the separation operation of the product from the strip that was performed in the previous cycle is not necessary. Move forward in the same state. Therefore, no force is applied to the strip from which the product has been separated.

[0011] When the roller that pulls the part of the strip other than the product and separates it from the product is in a fixed position, it is necessary to unwind what was once wound up as the strip flows forward. Furthermore, as shown by the two-dot chain line in FIG. 4, the peeling angle with respect to the product portion changes from α' to α. In other words, even if the belt is wound with the same force, the tension applied to the belt-shaped object other than the product and the force required to peel it off will vary, but in the present invention, the conditions for peeling it off are constant.

0012

DESCRIPTION OF THE PREFERRED EMBODIMENTS Examples of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a front view schematically showing an entire high-frequency processing machine according to a first embodiment of the present invention, and FIG. 2 is a front view showing a high-frequency processing machine according to a second embodiment. This high-frequency processing machine passes an endless insulating belt 4 between a lower electrode 2, which is a surface plate, and an upper electrode 3, which is a mold and is driven up and down. Send 1. Then, the insulating belt 4 and the strip 1 are sandwiched between the lower electrode 2 and the upper electrode 3, and heated and pressurized using high-frequency dielectric heating. That is, the insulating belt 4 also serves as a feed conveyor from upstream of the upper and lower electrodes to product discharge, and is driven by a pinch roller 5 that rotates intermittently in conjunction with the processing cycle of the upper and lower electrodes.

The raw material strip 1 is fed onto the insulating belt 4 by a suitable feeding means that is capable of superimposing three types of strips from three rolls in the drawing. That is, while the upper electrode 3 is rising, the belt-shaped object is sent forward by one pitch in conjunction with the feeding of the insulating belt 4. Then, the product is processed into a strip by a high-frequency processing device composed of an upper electrode 3 and a lower electrode 2, and the processed strip is placed on an insulating belt 4. It will be sent. A separating device is disposed in front of the high-frequency processing device to separate the processed product into a product A and a product-separated strip B, so-called punched waste.

The separating device for separating the product A from the processed strip is composed of a clamp that presses the product part of the strip and a moving roller 8 that pulls the strip and separates it from the product. In the embodiment shown in FIG. 1, the clamp is composed of two clamps: a first clamp 6 that presses at least the front half of one product part, and a second clamp 7 that presses at least the rear half of the product part ahead of it. There is. The peeling operation of the product part and the non-product part of the strip is performed by starting from the rear half of the product part which is fixed by pressing with the second clamp 7, as shown by P in FIG. The range of one peeling operation is up to the first half of the next fixed product part. In this way, the peeling operation between the product and the parts other than the product can be smoothly performed.

The moving roller 8 moves forward in accordance with the feeding of the strip, and retreats while separating the product from the strip while the feeding of the strip is stopped. In other words, when the moving roller 8 performs an operation of separating the product from a strip other than the product, the moving roller 8 performs only an intermittent peeling operation.
Do not perform rewind operations. Therefore, the repeated tension force associated with winding and unwinding does not act on the strip from which the product has been separated.

The moving roller 8 is used to pull and sequentially peel off the strip separated from the product, and is a pinch roller formed by a pair of upper and lower rollers in the drawing. However, this moving roller is not limited to a pinch roller as long as it can pull the strip and peel it off from the product. The moving roller 8 is attached to an endless chain-shaped moving device.

A moving device 9 for moving the moving roller 8 in the front-rear direction according to the flow of the belt-shaped material has a chain 10 linked to the drive shaft of the pinch roller 5, which is a drive device for the insulating belt 4, for forward movement. The return process is performed by a separately provided motor 11 dedicated to the return process. That is, the forward movement of the moving roller 8 is assumed to be linked at the same speed as the movement of the insulating belt 4, and the moving distance is assumed to be the processing pitch dimension of the product indicated by P in FIG. 3. At this time, the clutch of the return-only motor 11 is kept in a disengaged state. When the movable roller 8 returns, the clutch with the drive shaft of the pinch roller 5 is disengaged, and the clutch of the motor 11 is returned by the pitch dimension P sent to the destination. Preferably, this return speed is approximately the same as the speed at which the moving roller 8 peels off the strip.

Since the moving roller 8 is used to pull and sequentially peel off the strip separated from the product, it is equipped with its own rotational drive means (motor). The sent out strip is
The dancer roller 12 is wound and slowly wound onto a winding device 13. A limit switch is provided on the dancer roller 12 to prevent overwinding.

In this manner, by winding the dancer roller 12 and winding up the strip B from which the product has been separated, the winding device 13 winds up the strip B, which is produced by the movement of the moving roller 8. Changes in unwinding and feeding from the moving roller due to intermittent rotational drive can be absorbed by the dancer roller 12, and the winding device 13 can be configured to continue winding at a relatively slow speed at all times. This makes it possible to avoid applying as much impactful force as possible to start and stop the winding operation on the strip B, the so-called scraps, which is separated from the product A and wound up by the winding device 13. become able to. The product A separated from the strip is placed on an insulating belt 4 and sent to the destination.
It is discharged to the outside of the machine by the discharge belt 14.

FIG. 2 shows a second embodiment of the present invention, which differs from the embodiment shown in FIG. 1 in that a strip winding device 15 that moves integrally with the moving roller 8 is provided. It is in. The moving device 9 for moving the moving roller 8 is driven, as in the first embodiment, by a chain 10 wound around the drive shaft of the pinch roller 5 and a motor 11 dedicated to the return process.

The rotation of the winding device 15 of the embodiment shown in FIG. 2 is interlocked with the rotational drive device of the moving roller 8 through a friction clutch, and the possible winding capability itself is limited to the rotation of the belt-like material by the moving roller. The amount should be greater than the amount to be peeled off. In this way, the product is reliably wound up by the moving rollers without causing any slack in the peeled-off strip, and there is no need to provide a separate drive device for the winding device 15. Further, there is no need to provide a dancer roller or the like, and the entire device can be simplified.

[0022]

According to the present invention as defined in claim 1, the product separation device in a high-frequency processing machine that processes products at regular intervals of the strips, it is possible to separate the soft synthetic resin strips, which have been difficult to separate in the past. In products where products are processed at regular intervals, it is possible to automatically separate the product from other parts without interfering with the flow of processing. The strip from which the product has been separated is wound up by an operation only in the winding direction, and no unwinding operation is required. Therefore, the large force associated with switching between winding and unwinding the product into separate strips is not applied, and there is less chance of the product being cut, and the strip can be rolled up by repeating winding and unwinding. It is possible to avoid getting entangled with equipment, etc. Therefore, even if the strength of the part from which the product is extracted is very weak, such as a product made of thin material, or if the non-product part of a strip is extremely reduced in order to improve yield, the product can be automatically extracted without any problem. It can be separated from other parts.

According to the second aspect of the invention, when winding up the strip that has been peeled off from the product by the moving roller,
The presence of the dancer roller allows the movement of the moving roller to be wound onto a winding device in a fixed position. Then, it is possible to wind up the strip of products separated intermittently by the moving rollers in a continuous operation as much as possible.

[0024] According to the third aspect of the invention, since the strip from which the product has been peeled off by the moving roller is wound up by the winding device that moves together with the moving roller, the product can be directly removed without causing any slack in the strip. can be rolled up,
The entire device can have a simple structure.

[Brief explanation of drawings]

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

[Figure 2]
A front view showing a second embodiment of the present invention,

[Figure 3] Top view of the strip on the insulating belt after the product has been processed

[Figure 4] Front view showing changes in the state of peeling off the product and non-product parts of the strip by the moving roller

FIG. 5 is a longitudinal cross-sectional view showing changes in the processing state of a strip-shaped object by a high-frequency processing machine.

[Explanation of symbols]

1　Striped material 1a Continuous part 2 Lower electrode 3 Upper electrode 4 Insulation belt 5 Pinch roller 6 First clamp 7 Second clamp 8 Moving roller 9. Mobile device 11 Motor 12 Dancer Laura 13 Winding device 15 Winding device

Claims (3)

[Claims] Claim 1: Intermittently sending out a strip of a fixed size,
In a high-frequency processing machine that processes products into a strip at regular intervals using an insulating belt and a lower electrode and an upper electrode, there is a clamp that presses the product part of the strip after processing, and a product of the strip that is pressed by the clamp. A moving roller is provided to peel off the other parts, and this moving roller moves forward by the feeding distance when the strip is sent forward,
The product part is pressed by a clamp when the feeding of the strip is stopped, and the parts of the strip other than the product are peeled off by the moving roller while the moving roller is retreating at regular intervals of the strip. A product separation device in a high-frequency processing machine that processes products. 2. The strip that has been peeled off and separated from the product by the moving roller is wound around a dancer roller and taken up by a winding means at regular intervals of the strip. A product separation device in a high-frequency processing machine that processes products. 3. A product separation device for a high-frequency processing machine for processing products at regular intervals of a strip according to claim 1, wherein a winding means for the strip from which the products are separated is moved together with a moving roller.