JPS63272497A - Slit working device for adhesive sheet - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention provides an adhesive sheet in which a surface base material is laminated to a release sheet via an adhesive, in which either the release sheet or the surface base material is attached in the longitudinal direction. This invention relates to a slitting device for obtaining slit products.

(Prior art) One of the conventional methods for obtaining a product by slitting only one side of the laminated layer, for example, the release sheet, in the length direction in an adhesive sheet in which a surface base material is laminated to a release sheet via an adhesive. One method is to first separate the adhesive sheet into a surface base material having an adhesive layer and a release sheet, then slit only the release sheet in the length direction, and then laminate it to the surface base material again.

In this release sheet separation method, the surface base material and the release sheet are separated from each other when passing through a pair of contact rolls, but even after leaving the separation position, the surface base material with an adhesive layer on the surface The release sheet tends to stick to the surface of the product, the peeling position is not constant, and the surface material or release sheet is subject to intermittent impact, which causes wrinkles in the surface substrate or the release sheet, and in some cases, these wrinkles persist for a long time. There is a disadvantage in that when the slit release sheet is later bonded to the surface substrate again, a product with the desired beautiful finish cannot be obtained.

Another method of slitting only the release sheet of the adhesive sheet in the length direction is to continuously feed out the surface base material and release sheet while they are stuck together, and press a fixed blade or rotary blade from the release sheet side to slit the release sheet. There is a method for processing. In this method, it is difficult to accurately slit only the release sheet due to vertical movement of the surface base material or release sheet due to changes in the thickness of the adhesive, or vibration of the back support roll. Furthermore, when slitting in multiple strips with many parallel blades, it is extremely difficult to process slits to a uniform depth on each blade, and furthermore, when using rotary blades, it is difficult to manufacture them with precision. It is extremely difficult to produce a good perfectly round blade, and therefore it is difficult to adjust the slit depth with high precision using a rotary blade.

(Problems to be Solved by the Invention) The present invention solves the problem of changing or hacking the thickness of the adhesive sheet due to changes in the thickness of the adhesive when slitting either the surface base material or the release sheet of the adhesive sheet in the length direction. Even if there is a runout of the support roll, it is not affected by this and always ensures that only one sheet, either the surface base material or the release sheet, is kept at a uniform depth without damaging the other sheet. To provide an adhesive sheet slitting device capable of slitting a pressure-sensitive adhesive sheet and performing the work smoothly.

Means for Solving Problem C) The present invention provides an apparatus for longitudinally slitting either the surface base material of a pressure-sensitive adhesive sheet or a release sheet.
A rotating body 2 that contacts the back support roll 1 via an adhesive sheet A is supported by a frame 3, and its relative position with respect to the rotating body 2 can be adjusted by a fine adjustment device 4 installed on the frame 3. The fixed blade 5 for slitting is provided on the side of the rotating body 2 so as to be able to process the slit in contact with the adhesive sheet A along the back support roll 1 at the tip 6 of the fine adjustment device 4. Adhesive sheet slitting device (function) The device of the present invention has a rotating body and a fixed blade both supported by a frame, and the relative position of the fixed blade to the rotating body can be adjusted. Therefore, once the relative position is determined in relation to the adhesive sheet, that relative position will always be maintained unless it is changed or adjusted. The slit will be processed while keeping it intact. Therefore, for example, if the thickness of the adhesive changes and therefore the thickness of the adhesive sheet, or if the back support roll used to feed out the adhesive sheet oscillates, the depth of the slit will change due to these factors. It is possible to always process slits to a constant depth without any problems.

(Example) Embodiments of the present invention will be described with reference to the drawings.

In the figure, 1 is a rotary back support roll, and 2 is a rotating body, which is rotatably supported by a frame 3. This rotary body 2 is fed out for slitting and comes into contact with the back support roll 1 in a pressed state through the adhesive sheet A, and rotates as the adhesive sheet A is transferred. The state in which it is supported by the frame 3 can be, for example, such that the ring-shaped rotating body 2 is fitted and supported (in four places in the figure) by a grooved roll 7 installed in the space between the frames. Further, in the case of a rotating body (not shown) having a central axis, a structure may be adopted in which the shaft portion is supported by a frame.

Although the width of the rotating body 2 is not specified, it is approximately I C
One with a width of about m will be used.

5 in the figure is a fixed blade for slitting, which slits the adhesive sheet at the part where the rotating body 2 contacts the adhesive sheet A, and its relative position with respect to the rotating body 2 can be adjusted. It is provided on the side of the body 2. The relative position of the fixed blade 5 with respect to the rotating body 2 can be adjusted by using the frame 3.
The adjustment is performed by a fine adjustment device 4 (adjusted by, for example, a micrometer B) attached to the fine adjustment device 4, and its mounting position is installed at the tip 6 of the fine adjustment device 4. The material of the fixed blade 5 is not particularly limited, but ceramic is preferred as it is less abrasive and difficult to adhere to adhesive.

Reference numeral 8 in the figure is a support roll that comes into contact with the rotating body 2 and prevents the rotating body from wobbling. Incidentally, if vibration occurs in the rotating body 2, the relative position of the fixed blade 5 with respect to the rotating body 2 cannot be accurately determined. Therefore, when performing slitting, it is not possible to ensure a uniform slit depth, and it is not possible to reliably slit either the surface base material or the release sheet.

Therefore, although it is desirable to install this support roll 8 to prevent the rotating body 2 from swinging, it is not necessarily necessary as long as the rotating body 2 is supported with sufficient precision to prevent it from swinging.

Thus, the slitting device according to the present invention includes a rotating body 2
The fixed blade 5 for slitting and the fixed blade 5 for slitting are both installed on the same frame 3, and the relative position of the fixed blade 5 with respect to the rotating body 2 can be adjusted with extremely high precision. If the fulcrum is pressed against the back support roll 1 through the adhesive sheet A, even if the thickness of the adhesive sheet A fluctuates due to changes in the thickness of the adhesive layer, the back support roll 1 will not run out. Even if this occurs, slitting can be performed reliably at a uniform depth in response to the current situation without being affected by it.

After the adhesive sheet has been slit by this device, if necessary, the entire adhesive sheet is cut into a fixed width by another slitter mechanism before being wound onto the take-up roll, and these unit strips are each cut onto the take-up roll. It will be rolled up.

Of course, the entire cutting by the slitter can be done on the same support roll, or it can be done at a different position from the slit position.

(Effects of the Invention) According to the slitting device according to the present invention, when slitting an adhesive sheet, the slitting process can be performed without taking the trouble of separating the adhesive sheet into a surface base material having an adhesive layer and a release sheet. Furthermore, the relative position of the fixed blade to the rotating body can be adjusted, so once the relative position is determined in relation to the adhesive sheet,
The relative position thereof is always maintained unless it is changed or adjusted, and when the fixed blade contacts the adhesive sheet and performs slitting, the fixed blade performs slitting while maintaining its relative position with the rotating body. Therefore, even if the thickness of the adhesive sheet fluctuates due to a change in the thickness of the adhesive layer, or if the bank support roll oscillates, it will not be affected by this, and will always respond to the current situation. It is possible to process slits with uniform depth and a beautiful finish.

[Brief explanation of the drawing]

FIG. 1 is an explanatory side view of an apparatus for slitting an adhesive sheet according to the present invention, with one side of the frame partially cut away, and FIG. 2 is a perspective view of the slitting apparatus according to the present invention. It is an explanatory diagram. =8- (1)...Back support roll (2)...Rotating body (
3) Frame (4) Fine adjustment device (5) Fixed blade (6) Tip of fine adjustment device (7) Grooved roll (8) Support roll (9)... Frame support axis θ0)... Part for attachment to this device A... Adhesive sheet B... Micrometer patent applicant Kanzaki Paper Co., Ltd. Figure 1 Figure 2

Claims (1)

[Claims] In an apparatus for longitudinally slitting either the surface base material of an adhesive sheet or a release sheet, a rotating body 2 that contacts a back support roll 1 via an adhesive sheet A is supported by a frame 3, and A fixed blade 5 for slitting whose relative position with respect to the rotating body 2 can be adjusted by a fine adjustment device 4 installed at 3 is attached to the adhesive along the back support roll 1 at the tip 6 of the fine adjustment device 4. An adhesive sheet slitting device characterized in that it is installed on the side of a rotating body 2 so as to be in contact with the sheet and can perform slitting.