JPH0798999B2 - Secondary plating method of rotary screen or cylindrical mesh for rotary screen - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a secondary plating method for a rotary screen or a cylindrical mesh for a rotary screen for strengthening the waist.

[0002]

2. Description of the Related Art A method for manufacturing a rotary screen by a plating method is a method in which a copper roll having a negative resist image formed on the peripheral surface of the roll is nickel-plated to a thickness of 70 to 80 microns, The nickel film is taken out of the nickel bath and chucked at both ends by chuck rotating means to rotate at extremely low speed to uniformly press a soft cloth against the plating film to separate the plating film. The method of producing a rotary screen by the lacquer method is to apply a lacquer film to a cylindrical mesh for a rotary screen to close the mesh holes, and image-bak it to sublime the lacquer film in the exposed portion to expose the mesh holes. The cylindrical mesh for the rotary screen is manufactured in the same manner as the method for manufacturing the rotary screen by the plating method.

The rotary screen or the cylindrical mesh for the rotary screen thus formed by the plating method has a small thickness of 70 to 80 μm and is extremely weak, so that it cannot be practically used by chucking both ends in a printing machine. Therefore, conventionally, a non-conductive core rod is passed through a rotary screen or a cylindrical mesh for a rotary screen to support the inner circumference with one or several collars fitted in the middle of the core rod, and both ends of the core rod are supported. A pair of conductive conical cone chucks are fitted and a clamping ring is fitted from the outside, so that both ends of the core rod are chucked and a rotary screen or a rotary screen cylindrical mesh is immersed in a nickel plating bath. The rotary screen or the cylindrical mesh for the rotary screen is rotated by energizing the space between the tip storage basket that serves as the positive electrode and the pair of conical cone chucks that serves as the negative electrode in the nickel plating bath. Was 100-120 microns, and the secondary plating was applied to strengthen the waist. When the primary plating is performed so that the plated film has a thickness of 100 to 120 μm so that the secondary plating does not have to be performed, it is difficult to peel the plated film from the copper roll.

[0004]

According to the conventional method, it is necessary to prepare many kinds of chuck cones, it takes time to chuck, and plating current is insufficient even if the chuck pressure is strong, and plating is performed for a long time. There is a problem that the rotary screen or the cylindrical mesh for the rotary screen is curved or has a crack at the end, and the chuck cone is plated when the chuck pressure is too high.

The present invention has been devised in view of the above-mentioned points, and can be easily supported so that a plating current can be sufficiently supplied without chucking a rotary screen or a cylindrical mesh for a rotary screen, and it can be immersed in a nickel plating bath. It is an object of the present invention to provide a secondary plating method for a rotary screen or a cylindrical mesh for a rotary screen, which can be rotated by rotating.

[0005]

According to the present invention, as a means for solving the above problems, a rotary screen or a cylindrical mesh R for a rotary screen is provided with a horizontal rotary shaft 4 serving as a negative electrode above a nickel plating bath 5.
And hang it through the rotary screen or the rotary screen cylindrical mesh R through a weight roll 19 made of a non-plating adhering material, and place the lower part of the rotary screen or rotary screen cylindrical mesh R in the nickel plating bath 5 Of the nickel plating bath 5, which is rotated by rotating the horizontal rotary shaft 4 to be a positive electrode in which the nickel chips in the nickel plating bath 5 are stored.
2, 13, 14 and the horizontal rotary shaft 4 serving as the negative electrode
The present invention provides a secondary plating method for a rotary screen or a cylindrical mesh for a rotary screen or nickel mesh electroplating for a rotary screen by applying an electric current between the two.

[0006]

EXAMPLE An example of a secondary plating method for a rotary screen or a cylindrical mesh for a rotary screen of the present invention will be described with reference to the drawings. First, the structure of an apparatus for carrying out the method of the present invention will be described. A chuck 3 is provided at the tip of a spindle 2 rotated by a motor 1 on the upper side of one side of the apparatus frame F, and a horizontal rotating shaft 4 serving as a negative electrode is cantilevered by the chuck 3. A nickel plating bath 5 is placed on the recovery tank 6 below the horizontal rotary shaft 4, and a high-voltage power supply 7 and a circulation pump 8 are installed below the spindle 2. The nickel plating bath 5 has a dam plate 5b defining the overflow bath part 5a on one side, the bottom of the overflow bath part 5a communicates with the recovery tank 6, and the nickel plating solution overflowing the dam plate 5b is recovered in the recovery tank. Recovered in 6. The circulation pump 8 supplies the nickel plating solution in the recovery tank 6 to the nickel plating bath 5, and the nickel plating solution flowing into the recovery tank 6 overflows to one side of the nickel plating bath 5 in a small volume. It overflows from the barrier plate 5b that partitions the tank portion 5a, and is collected in the collection tank 6 from the bottom of the overflow tank portion 5a. The recovery valve 1 is opened by opening the partition valve 9.
It is designed to be collected in the collection tank 6 through 0. In the high-voltage power supply device 7, a negative terminal 7a is connected to a power supply brush 11 that is in sliding contact with the spindle 2, and a positive terminal 7b serves as a positive electrode for accommodating a nickel chip in a nickel plating bath 5 and is made of titanium.
It is connected to 13, 14. Chip storage cage 12, 13
Are provided on both sides in the nickel plating bath 5, and the chip storage baskets 14 are inserted through the device frame F and the circular holes 15 provided on the side faces of the nickel plating bath 5 and the horizontal rotary shaft 4 is inserted.
The lower surface of the basket inner end is received by the bracket 16 and the holder 17 at the base end of the basket is received by the circular hole 15 through the inner side of the rotary screen or the cylindrical mesh R for the rotary screen which is hung through. The horizontal rotary shaft 4 is provided with a pair of collars 18, 18 whose position is adjustable, and regulates the position of the rotary screen or the cylindrical mesh R for the rotary screen which is passed through the horizontal rotary shaft 4 and hangs. The rotary screen or the cylindrical mesh R for the rotary screen is placed through a weight roll 19 made of a non-plating adhering material. The weight roll 19 is provided with a pair of adjustable collars 20 and 20, and the position is regulated so that the weight roll 19 does not drop out with the rotary screen or the cylindrical mesh R for the rotary screen sandwiched therebetween.

Next, the operation of the embodiment apparatus constructed as described above will be described. First, the pair of collars 18 and 18 provided on the horizontal rotary shaft 4 and the pair of collars 20 and 20 provided on the weight roll 19 are adjusted to have an interval slightly larger than the width of the rotary screen or the cylindrical mesh for the rotary screen, respectively. The weight roll 19 is located below the horizontal rotation shaft 4. Then, after the rotary screen or the cylindrical mesh R for the rotary screen is positioned so that the horizontal rotation shaft 4 and the weight roll 19 pass inside,
The weight roll 19 is placed on the rotary screen or the rotary screen cylindrical mesh R, and then the rotary screen or the rotary screen cylindrical mesh R is placed on the horizontal rotary shaft 4. This way,
The rotary screen or the cylindrical mesh R for a rotary screen is a horizontal rotary shaft 4 which is a negative electrode by being bent into an elliptic cylindrical shape or an elongated cylindrical shape by the gravity action of a weight roll.
It hangs down and makes a circular arc contact with the horizontal rotary shaft 4 so that a necessary and sufficient high-voltage plating current can be supplied. When the start switch is turned on, the motor 1 and the pump 8 are driven, and the high voltage power supply device 7 starts supplying the high voltage plating current. When the motor 1 is driven, the horizontal rotary shaft 4, the rotary screen or the rotary screen cylindrical mesh R and the weight roll 19 are rotated. Rotary screen or cylindrical mesh for rotary screen R
Since the lower part is immersed in a nickel plating bath and constantly moves at a constant speed, and a high-voltage plating current flows as necessary and sufficient, uniform plating is applied to both the inner and outer surfaces in a short time. Since the rotary screen or the rotary screen cylindrical mesh R is hung and held on the horizontal rotary shaft 4, the horizontal rotary shaft 4 is plated so that the surface or the end is not scratched. Almost no adhesion occurs, and the supply of plating current is kept good for a long period of time.

[0008]

As described above, according to the secondary plating method of the rotary screen or the cylindrical mesh for the rotary screen of the present invention, the rotary screen or the cylindrical mesh for the rotary screen is an elliptic cylinder due to the gravity action of the weight roll. It hangs on a horizontal rotating shaft that becomes a negative electrode rod by bending into a rectangular shape or an elongated cylindrical shape, and an arc contact sufficient for supplying a plating current to the horizontal rotating shaft is achieved. When the secondary plating is performed, the rotary screen or the cylindrical mesh for the rotary screen smoothly rotates due to the rotation of the horizontal rotating shaft. Since the lower part of the rotary screen or the cylindrical mesh for the rotary screen is immersed in the nickel plating bath and constantly moves at a constant speed, uniform plating is applied to both inner and outer surfaces in a short time. Since the rotary screen or the cylindrical mesh for the rotary screen is hung and held by the horizontal rotary shaft, it is plated so as not to scratch the surface or the end, and the horizontal rotary shaft is plated with almost no plating. The current supply is kept good for a long time.

[Brief description of drawings]

FIG. 1 is a schematic vertical sectional front view showing a secondary plating method of a rotary screen or a cylindrical mesh for a rotary screen according to an embodiment of the present invention.

2 is an enlarged sectional view taken along line II-II in FIG.

[Explanation of symbols]

R Rotary screen or cylindrical mesh for rotary screen 4 Horizontal rotating shaft 5 Nickel plating bath 12, 13, 14 Chip storage basket 19 Weight roll

Claims (1)

[Claims] 1. A rotary screen or a cylindrical mesh for a rotary screen is hung by passing through a horizontal rotary shaft that serves as a negative electrode above a nickel plating bath, and the rotary screen or the cylindrical mesh for a rotary screen is made of a non-plated material. Place it through a weight roll, and rotatably rotate the horizontal part of the rotary screen or the lower part of the cylindrical mesh for the rotary screen by immersing it in the nickel plating bath of the nickel plating bath and rotating the horizontal rotary shaft, The present invention is characterized in that nickel is electroplated on a rotary screen or a cylindrical mesh for a rotary screen by energizing between a tip storage basket serving as a positive electrode containing nickel chips and a horizontal rotating shaft serving as the negative electrode. Secondary plating method for rotary screen or cylindrical mesh for rotary screen.