JPS58174590A - Masking method in stripe shaped partial plating - Google Patents

Abstract

PURPOSE:To facilitate the peeling-off of a tape part unnecessary in the succeeding working process, in a method for sticking a masking tape having slits provided thereto to a running long strip, by carrying out said method in such a manner that a groove part is provided to a sticking roll. CONSTITUTION:A strip 1 running to a direction A is held constant in relative positional relation to a masking tape 3 and passed through the nip of sticking roll pairs 4, 5. On the other hand, the tape 3 is run to a direction B so as to be sticked to one surface of the strip in the direction A while slits 8 corresponding to a desired stripe shaped partial plating dimension are cut and sticked to the strip 1 between the rolls 4, 5. Subsequently, an unnecessary tape part 9 demarcated by the slits 8 is peeled off at the position of a guide roll 10. In this case, the roll 5 opposed to the roll 4 is formed into a roll with grooves 12 having a width slightly smaller than that of the part 9 provided on the circumference thereof. By this structure, because the part 9 positioned above the groove 12 is passed between the rolls 4, 5 in a non-pressurized state, the peeling-off of the part 9 is facilitated and the cutting of the tape can be completely prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a masking method for stripe-like partial plating of a long strip.

Stripe partial plating is widely used to perform plating 2 by pasting cut masking tape on the parts to be plated on a running long strip. Various masking methods have been proposed and implemented.

As a prior art example of this masking method, masking tape is attached to a strip as presented in Japanese Patent Application No. 58-65855 filed by the present applicant entitled "Partial plating method for a long strip." There is a method of making a slit in the masking tape just before applying it, and peeling off the unnecessary part of the masking tape after it passes through a roll. However, although this method can reliably maintain the attachment position of the masking tape on the strip, the adhesive strength between the adhesive applied to the tape surface and the strip may be too strong, or the masking tape may be pulled when peeled off. If the peeling tension is unbalanced, the tape tends to break when removing unnecessary parts of the masking tape attached to the strip, which can cause a decrease in yield and workability. It was something like that.

Therefore, it is an object of the present invention to eliminate the drawbacks of the prior art as described above, to make it possible to easily peel off unnecessary tape parts after pasting masking tape under certain conditions, and to eliminate the need for thinner tape, which was difficult with the conventional method. To provide a masking method by which a tape part can be smoothly peeled off.

The gist of the present invention is that a pair of masking tags with slits attached to the running long strips are attached to the roll on the side of the roll that comes into contact with the masking tape so that the width of the slit is fixed. This is accomplished by providing appropriate grooves, and embodiments according to the present invention will be described below with reference to the drawings.

In the masking method according to the embodiment of the present invention, as schematically shown in FIG. 1, the elongated strip 1 is run in the direction indicated by arrow A. The running strip 1 is kept constant in its relative position with the masking tape 3 applied by the guide 2, and the pair of applied strips 1 pass between the rolls 4 and 5.

On the other hand, the masking tape 3 is run in the direction shown by arrow B from at least one side of the running direction of the strip 1 so as to be attached to at least one side of the strip 1, and is attached to a pair of cutter rolls 6 and a receiver. The cuts 8 (see Figure 2) are made according to the required striped partial plating dimensions by a canting means such as a roll 7 or a stationary cutter (not shown).
Immediately after applying the pair of rolls 4 and 5
It is attached to the striae in between.

The unnecessary tape portion 9 (see FIG. 2) defined by the cuts 8 made by the cutting means of the masking tape 3 attached to the strip is peeled off from the strip L at the position of the guide roll 10, and Thereafter, known processes such as required plating and peeling off of the masking required portion 11 of the tape (see FIG. 2) are performed.

In such a process, the pasting rolls 4 and 5 for pasting the masking tape 8 slit by the cutting means onto the strip 1 may be provided with one stripe-like partial plating on one side of the strip 1. As an example, the second
As shown in the figure: the roll 4 on the side that comes into direct contact with the strip 1 is a flat roll type (11111°), while the roll 5 that acts to press the masking tape 8 against the strip 1 is , provided in roll form with grooves 12 as will be described in detail below.

In the case of pasting with grooves, the grooves 12 provided on the circumferential surface of the roll 6 are
It has a width slightly smaller than the width of the unnecessary tape portion 9 defined by the cut 8, and is arranged so that the centers of both widths substantially coincide. For pasting the roll 5 and the flat roll shape with such grooves 12, by pasting the masking tape 3 on the strip 1 between the roll 4, the width of the masking required portion 11 and unnecessary tape portion 9 of the tape can be adjusted. Both end portions 13 in the direction are applied to the strip 1 under pressure, while the unnecessary tape portions 9 located on the grooves 12 of the roll 5 are pasted between the rolls 4.5 in a non-pressurized state. In other words, masking required portion 1 of masking tape 3
1 is reliably attached to the strip 1, and on the other hand, only a small portion 13 of the unnecessary tape portion 9 of the masking tape 8 at both ends in the width direction is attached to the strip 1. Therefore,
The subsequent unnecessary tape portion 9 can be peeled off very easily, and tape breakage etc. during the peeling operation can be completely prevented.

Here, regarding the relative dimensions and positional relationship between the width of the unnecessary tape portion 9 and the width of the groove 12, the relative width dimensions may be selected to be substantially the same, or only one end portion of the unnecessary tape portion may be selected. It may be possible to select the center position in the width direction of both so that pressure can be applied, but in order to always maintain the positional relationship of the unnecessary tape portion with respect to the five strips in the desired relationship, as described above, it is necessary to select the unnecessary tape portion. The selection should be such that both ends of the section can be attached to the strip.

In addition, in the above explanation, a case was explained in which one stripe-like partial plating was applied to one side of a single strip, but as shown in FIGS. 8 and 4, multiple grooves are provided and multiple strips are plated. It will be readily understood that it can be adapted to stripe-like partial plating, or that a pair of grooved pasting rolls can be constructed, each with a pair of grooved pasting rolls, for stripe-like partial plating on both sides of a strip.

As described above, according to the present invention, by applying the slitted masking tape to the strip using a grooved application roll, the unnecessary tape portion that is peeled off from the strip in the subsequent work process is only at both ends. Since the tape is attached to the strip, the tape portion can be peeled off with a small peeling force, and the resulting drop in yield and productivity can be reliably prevented. Since the unnecessary tape part is attached to the strip from the beginning by applying local pressure, it is easy to peel off the unnecessary tape part at the beginning of the work, which is an effective method for shortening work time and improving work efficiency. It is. Furthermore, since the peeling force of the unnecessary tape portion is small, it is possible to easily produce extremely narrow striped partial plating in a continuous manner, which has been difficult to produce in the past.

[Brief explanation of the drawing]

FIG. 1 is a diagram schematically showing a masking method according to an embodiment of the present invention. FIG. 2 is a partial sectional view of the pasting roll shown in FIG. 8 and 4 are views showing a modified example of pasting shown in FIG. 2. 1... Strip 8... Masking tape 4. 6... Paste roll 9... Unnecessary tape portion (of masking tape) 11... ( (Masking tape) Required masking part 12...Groove

Claims (1)

[Claims] A method of pasting masking tape that has undergone predetermined cuts to a strip running between rolls, and peeling off unnecessary tape portions of the masking tape defined by the cuts from the strip to achieve the desired masking. , a partial plating masking method in which the unnecessary tape portion of the masking tape has a groove on the circumference.