JP3648187B2 - Web cutting and winding device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a web cutting and winding apparatus in a winder that continuously winds a web on a winding core at fixed lengths.
[0002]
[Prior art]
Normally, when winding a web, the web continuously fed from the previous process is wound around the core via a touch roller at a certain length, and is rewinded by pressing with a presser roller. However, in this rewinding, conventionally, an adhesive tape or the like is applied to the surface of the core, and the web in the middle from the fully wound roll wound with a certain length of web to the new core is pressed against the new core and immediately cut. The cutting end of the web is wound around a new core by cutting with a blade.
[0003]
However, conventionally, when a winding roll wound using an adhesive tape in this winding is used in the next process, the adhesive tape adhesive may adhere to the machine, and even during winding, the winding roll may be wound. As the work of winding the adhesive tape around the surface of the core increases and the cost of the tape increases, it becomes a problem. Instead of the above method, there is a so-called no-tape winding method that does not use an adhesive tape for rewinding the web with a winder. It has been adopted.
In this no-tape method, as shown in FIG. 6, the web W continuously fed from the previous process is wound around the core 1 through the touch roller 11 at regular lengths, and is pressed by the presser roller 14 and rewinded. However, the web W in the middle from the full roll R around which the web having a predetermined length is wound to the new core 1 is cut by the cutting blade 12 and wound around the new core 1 using the winding guide roller 13 It is.
[0004]
[Problems to be solved by the invention]
However, the conventional tape-less winding method that has been implemented is sufficient even if the winding angle θ of the web wound around the new core (see FIG. 6) is 1/4 turn, that is, about 90 °, because of the physical properties of the web. It can be wound around the new core without any wrinkles.
However, soft vinyl chloride, polyethylene, polyvinyl alcohol, etc., which are soft in the physical properties of the film, are not sufficiently wound around the new core. That is, the web is cut between about 90 ° of the winding angle θ in FIG. 6, that is, (360 ° -270 °), and the leading end of the web W is carried to the surface of the new core 1 by the winding guide roller 13. However, since the web is soft and soft, if the winding angle θ is large, the length until the tip of the cut web reaches the contact point between the new core 1 and the touch roller 11 becomes long. Therefore, the web is straight. It is sent as a kite, and the kite is wound around the new core, and then the two layers and three layers are sequentially wound on this to transfer the kite to the next wound web And the quality of the wound web is impaired.
[0005]
The present invention addresses the actual situation as described above, and in particular, finds that the winding angle is small and that the web guide plate capable of winding more than a predetermined value is combined with the new core at the time of winding the soft resin on the web. The purpose is to eliminate wrinkles and eliminate quality hindrance caused by wrinkle transfer.
[0006]
[ Means for Solving the Problems]
That is, the feature of the present invention that achieves the above-described object is that the web fed from the previous process is continuously wound around the winding core through the touch roller at a certain length, and the web having a certain length is wound. In a winding machine that cuts the web in the middle from the full roll to the new core with a cutting blade and winds the cut end around the new core, the web in the middle from the full roll to the new core is touch roller A guide plate capable of being wound on the surface of the new core at least 5/6 rounds from the pressure contact position between the core and the new core, the tip thereof being provided close to the contact point of the core and the touch roller, and A traverse cutting device is provided on the surface of the core just before the guide plate to enable the web to be wound without being subjected to adhesive treatment .
Here, it is important that the guide plate can wind the web around the surface of the new core at least 5/6 rounds, and the configuration can be various.
[0007]
According to a second aspect of the present invention, an air pipe is provided at the proximal end portion, and compressed air is injected from the spray nozzle at the distal end through the flow passage in the plate.
This configuration does not necessarily require the web and the guide plate tip to contact each other.
However, the tip of the guide plate may be brought into contact with the web. In this case, it is preferable that the tip of the guide plate has a good sliding property and is rounded by chrome plating, fluororesin processing or the like. (Claim 3)
It is also possible to improve the sliding by incorporating a guide roller at the tip of the guide plate. (Claim 4)
[0008]
[Action]
According to the apparatus of the present invention, when the web is continuously wound around the core at fixed lengths, when the web is cut by traversing the cutting blade with respect to the flow direction of the web by a rodless cylinder or the like, The tip of the guide plate is brought into contact with the web, or the web is pushed in with compressed air, and the new core is cut with a cutting blade in a state of being wound around 5/6 rounds or more.
[0009]
At this time, the web is cut within one-sixth or less of the winding around the new winding core, that is, at a winding angle of 60 ° or less, and the tip of the cut web is between the new winding core and the touch roller. It reaches the contact point, and even a soft web can be wound without wrinkles.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, specific embodiments of the present invention will be described with reference to the accompanying drawings.
[0011]
FIG. 1 shows an example of a cutting and winding apparatus according to the present invention, in which a winding core 1 is fitted on a winding shaft 5 provided between turret boards 4 and 4 on both sides, and is continuously fed from the previous step. The web W is wound around the core through the touch roller (not shown) and the core 1, and is cut and wound in the same manner as in the prior art. In FIG. A traverse cutting device 2 that cuts the web by moving a leather blade or the like across the flow direction of the web by a cylinder or the like (not shown) is provided, and the web W is wound around the surface of the core 1. A guide plate 3, which is a feature of the present invention, is provided to extend in the web width direction.
Among these, as the traverse cutting device, a known one used conventionally is used.
On the other hand, the guide plate 3 determines the winding range around the core 1, and the tip thereof is disposed so as to be close to the contact point between the core 1 and the touch roller.
[0012]
FIG. 2 shows only the main part of the arrangement of the guide plate 3. When the web is wound around the core 1, the angle in the range where the web is not wound around the surface of the core, that is, the winding angle θ ′. Is set so that it can be wound on the surface of the core 1 over at least 5/6 rounds exceeding the conventional 3/4 rounds.
[0013]
As described above, it is important that the guide plate 3 can wind the web W around the core 1 at least 5/6 rounds. To this end, the guide plate 3 has the tip of the core 1 and the touch roller. It is important to be as close as possible to the point of contact with 11.
[0014]
3 to 5 show the embodiments of these guide plates. In FIG. 3, the guide plate 3 has an air pipe 3a at the base end portion, and a compressed air flow passage 3b is formed through the plate portion. Winding so that the tip is a blowing nozzle 3c for jetting compressed air and the web W and the guide plate 3 are not in direct contact with each other, but the cut winding end is blown onto the core 1 by the blown air. If possible.
[0015]
On the other hand, FIG. 4 shows a structure suitable for directing the web W and the tip of the guide plate 3 close to each other instead of the compressed air blowing, and a thin guide roller 6 is incorporated in the tip of the guide plate 3. ing.
[0016]
FIG. 5 shows the guide plate 3 with a roundness 7 at the tip.
In this case, the web rubs the tip of the guide plate. Depending on the physical properties, the surface of the web may or may not be damaged, which is suitable for use in such a case.
Since the tip of the guide plate is close to the web, it is preferable that the tip of the guide plate is made of a material that is slippery by chrome plating, fluororesin processing, or the like.
Thus, when cutting and winding with the above apparatus, the core can be wound without wrinkles and without folding.
[0017]
【The invention's effect】
As described above, the present invention relates to a traverse cutting device that enables a web to be cut and wound on the surface of the core without adhesive treatment, and a web to be wound on the new core as described above. It is a cutting and winding device provided with a guide plate that enables winding at least 5/6 rounds on the surface. Conventionally, the range in which the winding core is not wound is about 1/4 round. On the other hand, since it is possible to make it as small as 1/6 or less, the wound end of the cut web can be brought close to the contact point of the core and the touch roller. It can reach the contact point in the immediate vicinity, and even a soft web can be wound without any wrinkles, and has a remarkable effect that the problem of wrinkle transfer to two or three layers, which has been a concern in the past, is eliminated.
[Brief description of the drawings]
FIG. 1 is a plan view showing an outline of a cutting and winding apparatus according to the present invention.
FIG. 2 is a schematic view showing a main part of a cutting and winding apparatus according to the present invention.
FIG. 3 is a main part schematic diagram showing one embodiment of a guide plate in the device of the present invention.
4A and 4B show another embodiment of the guide plate in the device of the present invention, where FIG. 4A is a front view and FIG. 4B is a side view.
5A and 5B show still another embodiment of the guide plate in the device of the present invention, where FIG. 5A is a front view and FIG. 5B is a side view.
FIG. 6 is a schematic diagram showing an aspect of conventional method of cutting and winding.
[Explanation of symbols]
w Web 1 Core 2 Traverse cutting device 3 Guide plate 3a Air pipe 3b Compressed air flow passage 3c Spray nozzle 6 Guide roller 11 Touch roller

Claims (4)

The web sent from the previous process is continuously wound around the core through the touch roller at a certain length, and the web on the way from the fully wound roll wound with the web of a certain length to the new core. In a winding machine that cuts with a cutting blade and winds the cut end around a new core, the web on the way from the full roll to the new core is moved from the pressure contact position between the touch roller and the new core to the new core. A guide plate that can be wound on the surface over at least 5/6 round is provided with its tip close to the contact point between the core and the touch roller, and the web is not directly attached to the surface of the core immediately before the guide plate. A web cutting and winding device, characterized in that a traverse cutting device that enables cutting and winding of the web is provided. 2. The web cutting and winding device according to claim 1, wherein the guide plate has an air pipe at a base end portion, and the compressed air is jetted from a spray nozzle at the tip through a flow passage in the plate. The web cutting and winding device according to claim 1 or 2, wherein the tip portion of the guide plate is made slidable by chrome plating, fluororesin processing or the like and rounded. 2. The web cutting and winding device according to claim 1, wherein a guide roller is incorporated at the tip of the guide plate to improve the slippage.

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