JPH06316793A - Electroplating method for long size material made of resin - Google Patents

Abstract

PURPOSE:To provide an electroplating method for a long size material made of a resin where deformation, etc., are not caused. CONSTITUTION:A hanger 21 to which a workpiece 10 is fitted has an electrode clip 22 on which the workpiece 10 is to be hung and an engaging member 25 for restraining the swinging of the workpiece 10. The workpiece 10 has a single projection contact 12 and an engaging part 13, which are arranged at both end parts 101, 102 respectively in the longitudinal direction of the workpiece 10. The projection contact 12 of the workpiece 10 is held by the electrode clip 22 and the engaging part 13 of the workpiece 10 is engaged with the engaging member 25 to allow plating. Thus, an unbalance of the stress acting on the workpiece 10 is not caused, allowing the occurrence of deformation, etc., to be prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for plating a resin-made long product, and more particularly to a plating method which is less likely to be deformed by plating.

[0002]

2. Description of the Related Art When electrolytically plating a long work piece, the work piece is provided with contact points with electrodes at several places. For example, when the resin molding 90 having a small cross section and a long frame is plated, several electrode contacts 91 are provided as shown in FIG. Then, as shown in FIG. 5, the electrode contact 91 is connected to a negative electrode 92 of a hanger 93 for mounting a workpiece, which is immersed in an electrolytic bath, for plating.

[0003]

However, the conventional plating method for a long resin-made product has the following problems. That is, in the conventional plating method in which the electrode contacts 91 are provided at several places, the workpiece is likely to be deformed by the plating.

It is considered that this is because the resin expands and contracts when several parts of the work are held by the electrodes at room temperature and then immersed in the plating solution for a long time. This expansion and contraction occurs due to thermal expansion because the plating solution is at a high temperature. In view of such conventional problems, the present invention aims to provide an electrolytic plating method for a resin-made long product that does not cause deformation or the like.

[0005]

SUMMARY OF THE INVENTION The present invention is an electrolytic plating method for a resin-made long work piece, which comprises immersing a resin-made long work piece in an electrolytic bath for electrolytic plating. The hanger for use has an electrode clip for suspending the workpiece and an engaging member for suppressing the swing of the suspended workpiece,
On the other hand, the work piece has a single protruding contact that is held by the electrode clip and a locking portion that engages with the engaging member, and the protruding contact and the locking portion have long ends. And a workpiece is hung on the hanger by the electrode clip, and the workpiece engaging portion is engaged with the engaging member for electrolytic plating. It is a method of electroplating long objects.

The most remarkable thing in the present invention is that
The work piece is provided with a single protruding contact, the protruding contact is sandwiched by an electrode clip, the work piece is provided with a locking portion, and the locking portion is engaged with the engaging member of the hanger. That is.

Further, the protruding contact and the engaging portion are arranged at both ends in the longitudinal direction of the workpiece. The above-mentioned engaging member suppresses the swing of the workpiece, and it is not always necessary to fix the workpiece, and it is sufficient to hold the workpiece gently. Further, the engaging member provided on the hanger and the engaging portion provided on the workpiece side are the case where the former is a pin-shaped object and the latter is an engaging hole which is loosely fitted in the pin-shaped object (see the embodiment), or There are cases such as the opposite.

[0008]

According to the electrolytic plating method of the present invention, the work piece is hung by being sandwiched between the electrode clips by the single protruding contact. Therefore, the stress imbalance acting on the workpiece does not occur unlike the conventional method in which several positions of the workpiece are connected to the electrodes. Therefore, the work does not deform due to the thermal expansion during the electroplating method.

The engaging member of the electrolytic cell has an engaging action of suppressing the shaking of the workpiece, and does not give a stress that deforms the workpiece.
As described above, according to the present invention, it is possible to provide an electrolytic plating method for a resin-made long product that does not cause deformation or the like.

[0010]

EXAMPLE An electrolytic plating method according to an example of the present invention will be described with reference to FIGS. In this example, as shown in FIG. 1, a resin-made long work piece 10 is attached to a hanger 21, immersed in an electrolytic bath, and electrolytic plating is performed. The hanger 21 includes an electrode clip 22 that suspends the workpiece 10 and an engaging member 25 that suppresses swinging of the suspended workpiece 10.

On the other hand, the workpiece 10 is, as shown in FIG.
It has a single protruding contact 12 sandwiched by the electrode clip 22 and a locking portion 13 that engages with the engaging member 25. The protruding contact 12 and the locking portion 13 are both long ends. It is arranged in the parts 101 and 102.

Then, as shown in FIGS. 1 and 2, the workpiece 10 is attached to the hanger 21 by the electrode clip 22 and is suspended in the electrolytic cell. Further, as shown in FIG. 3, the engaging portion 13 of the workpiece 10 is engaged with the engaging member 25 to perform electrolytic plating.

As shown in FIG. 1, the workpiece 10 of this example has
It is a long frame-shaped resin molding having a small cross section. Workpiece 1
A plate-like protruding contact 12 is provided on the upper end portion 101 of 0. Further, the lower end portion 102 also has a locking portion 1 of a similar shape.
3 is projected.

As shown in FIG. 3, the engaging portion 13 has
A pin hole 131 is formed to allow the engagement pin 251 of the engagement member 25 to be inserted loosely. On the other hand, as shown in FIG.
An electrode clip 22 is provided on the upper part of the hanger 21 and an engaging member 25 is provided on the lower part thereof.

The electrode clip 22, as shown in FIG.
A pair of elastic bodies 221 made of stainless steel for sandwiching the protruding contact 12 and a metal fitting 223 made of copper bent in an L shape.
And electrically connecting the elastic body 221 and the metal fitting 223,
It is composed of a stopper 222 for fixing. The elastic body 221 is a rod-shaped body having an outer diameter of 3 mm.

The hanger 21 is entirely made of a copper material, and as shown in FIG. 1, a hook 211 made of copper that engages with the power feeding bar 23 is attached to the upper part thereof. The hook 211 supplies power from the power supply bar 23 to the electrode clip 22 via the hanger 21. And the hanger 21 as a whole is the power supply bar 23.
Upper end of the hook 211 that engages with the elastic body 221
Is covered with a PVC coating layer except for the tip. The PVC coating layer is for electrically insulating the hanger 21 from the electrolytic solution.

Below the backboard 21, an L-shaped engaging pin 25 is inserted into the pin hole 131 of the workpiece 10.
1 is attached. And the electrode clip 22
Holds the protruding contact 12 and engages the engaging pin 251 with the engaging portion 13.
It is engaged with the pin hole 131 and plated.

Next, the function and effect of this example will be described. In this example, a single protruding contact 12 provided on the workpiece 10 is attached to a hanger and suspended in an electrolytic bath for plating. Therefore, the workpiece 10 does not cause stress imbalance that causes deformation even when immersed in the plating bath for a long time.

Therefore, according to this example, it is possible to provide an electrolytic plating method for a resin-made long product which does not cause deformation or the like. In this example, the locking portion 13 having the pin hole 131 is provided on the workpiece 10 side, and the engaging member 25
Although the engaging pin 251 is used as the above, conversely, the engaging pin may be attached to the workpiece side and the pin hole may be provided on the engaging member side.

[Brief description of drawings]

FIG. 1 is an explanatory diagram of an electrolytic plating method according to an embodiment.

FIG. 2 is an enlarged perspective view around a connecting portion between an electrode clip and a protruding contact in the embodiment.

FIG. 3 is an enlarged perspective view of the engagement state of the engagement member and the locking portion in the embodiment.

FIG. 4 is a perspective view of a conventional workpiece.

FIG. 5 is an enlarged view of a connecting portion between an electrode and a workpiece in a conventional electrolytic plating method.

[Explanation of symbols]

 10. ． ． Work piece, 101, 102. ． ． Edge, 12. ． ． Protruding contact, 13. ． ． Locking part, 21. ． ． Hanger, 22. ． ． Electrode clip, 25. ． ． Engagement member,

Claims (1)

[Claims] 1. A method for electroplating a resin-made long workpiece immersed in an electrolytic bath to perform electroplating, wherein a hanger for mounting a workpiece immersed in the electrolytic bath comprises:
The work piece has an electrode clip for suspending the work piece and an engaging member for suppressing the swing of the work piece being suspended, while the work piece has a single protruding contact pinched by the electrode clip. And a locking portion that engages with the engaging member, and the protruding contact and the locking portion are arranged at both ends of the elongated member,
A method of electroplating a resin-made long product, characterized in that a work piece is hung on the hanger by the electrode clip and a locking portion of the work piece is engaged with the engaging member to perform electroplating.