JPS6026829B2 - Partial plating method for long strips - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for partially plating a long strip using a masking tape.

When performing continuous stripe partial plating on a long copper strip using masking tape, for example, when plating one stripe, use two strips of masking tape to partially plate two stripes. In this case, three strips of masking tape were attached to each steel strip at regular intervals.

This was then introduced into a plating machine and continuous partial plating was performed. However, using this method, it is extremely difficult to attach several strips of masking tape to a copper strip or the like in parallel while satisfying the longitudinal dimension specifications.

Even if the application positions are set based on the required dimensions for each masking tape, it is very difficult to align and paste them at regular intervals, which causes dimensional fluctuations, curls, etc. in the width direction. This is because it occurs.

For this reason, this method has a large limit in increasing the dimensional accuracy of partial plating. In response, a method was considered in which masking tape was pasted on the copper strip, slits were made in the masking tape, and the masking tape was peeled off at the areas where plating was required, thereby completing the masking, but this method did not work. Although satisfactory dimensional accuracy can be obtained, there is a risk of scratches on the copper strip, and the disadvantage is that the steel material is soft and sticks to the slitter blade, causing the slitter blade to wear out quickly. .

Furthermore, when the obtained partially plated product is stamped and molded as a diode lead, the product may be bent and cut from the scratched part. The present invention has been made in view of the above points, and provides an advantageous partial plating method for long strips that uses a slitter but can increase the dimensional accuracy of masking tape attachment without damaging the surface of the strip. The purpose is to

The gist of the present invention is to provide a method for partially plating a long strip using masking tape, in which a slit is made in the masking tape just before pasting the masking tape on the strip, and the masking tape with slits is directly attached to the strip. After pasting, a portion of the masking tape corresponding to the area requiring plating is peeled off from the strip along the slit, and then the strip is led to a plating bath for plating. Partial plating method.

In the present invention, when making slits in the masking tape, the masking tape may be slit by directly placing the blade of the slitter on the masking tape application roll, or by using a dedicated blade receiving roll. Next, an embodiment of the partial plating method of the present invention will be explained with reference to the accompanying drawings.

In Figures 1 to 3, a blade receiving roll 4 is brought into contact with a traveling long strip 1 made of a metal to be plated, with a masking tape 2 sent from a roll 3 sandwiched therebetween. A slit 11 is made in the masking tape 2 by a slitter blade 5 just before the masking tape 2 is pasted.

As can be seen from FIGS. 2 and 3, two slits 11 are inserted, and the masking tape 2 is pasted onto the strip 1 in this state. Although not shown after pasting, the slit 11
A part of the masking tape 2, that is, a masking tape at a location where plating is required, is peeled off along the masking tape 2. For example, when the masking tape at the center is peeled off, a striped masking strip to be partially plated is completed. As the blade receiving roll 4, a hard hardened roll is used.

For rolls made of soft materials such as copper or iron, some of the metal may stick to the rotating slitter blade 5, forming a thin rounded film on the tip of the blade 5 and causing it to become unusable early. It becomes possible. From this point as well, it can be seen that the conventional slitting method is not preferable. The slitter blade 5 rotates along the circumference of the blade receiving roll 4 and is rotated by the pressing pressure thereof, and does not require an independent rotational drive here.

Further, in the case of this embodiment, the blade receiving rolls 4 also serve as masking tape pasting rolls, but the structure of the four blade receiving rolls is very simple.

FIG. 4 shows an example of manufacturing a striped partially plated strip according to an embodiment of the present invention, in which the masking tape 2 is pasted onto the strip 1 with the slit 11 cut in its central portion. The masking tape is wound onto the masking tape peeling machine 7 through the presser roll 6, and the strip 1 in this state (Fig. 5a) is led to the jet plating device 9 for plating, and then the masking tapes 2, 2 on both sides are
is wound up in a peeling machine 8 to obtain a single-sided striped partially plated strip with zero cross section as shown in FIG. 5b.

13 is stripe partial plating.

Note that 10 is a plating solution outlet, and 12 is a plating solution inlet.

As can be seen from the above explanation, according to the partial plating method of the present invention, a slit is made in the masking tape immediately before pasting, and after pasting, the portion of the masking tape corresponding to the part that requires plating is peeled off along the slit. Since it is a plating method, the strip 1 is not damaged, and even though there are slits when pasting the masking tape, each cut or nearly cut masking tape is in close contact with each other. It can be easily attached to objects with accurate dimensions without shifting the position.

Therefore, it is possible to improve the dimensional accuracy of the plated part and obtain an excellent product, and also to obtain a product that can be used with peace of mind because the material is not damaged.

[Brief explanation of the drawing]

FIG. 1 is a front view showing an embodiment of the partial plating method of the present invention;
Fig. 2 is a perspective view of Fig. 1, Fig. 3 is a side view showing the slitting situation, Fig. 4 is a front view showing the entire production line in the partial plating method of the present invention, and Fig. 5a is the masking strip. FIG. 5b is a cross-sectional view of a partially plated strip. 1: Long strip, 2: Masking tape, 3: Masking tape roll, 4: Blade support roll, 5: Slitter blade, 6
: Presser roll, 7, 8: Masking tape peeling machine, 9:
Plating device, 10: Plating liquid outlet, 11: Slit, 1
2: Plating liquid inlet, 13: Stripe partial plating. Figure 1 Figure 2 Figure 3 Figure 4 Figure 5

Claims (1)

[Claims] 1. In a method of partially plating a long strip using masking tape, a slit is made in the masking tape immediately before pasting the masking tape on the strip, and after the masking tape with the slit is pasted on the strip as is,
A portion of the masking tape corresponding to the part that needs to be plated is peeled off from the strip along the slit, and then the strip is led to a plating tank and plated. Law.