JPH0454757B2 - - Google Patents

Description

Detailed Description of the Invention <Technical Field> The present invention involves supporting and rotating a roll to be plated, such as a gravure plate-making roll, by immersing it in a plating liquid, and applying plating metal to a metal basket in the plating liquid. The present invention relates to a roll plating device that stores lumps, circulates plating liquid between a plating tank and a plating liquid regenerating device, and plies rolls to be plated.

<Prior art> In a conventional roll plating device, the distance between the metal basket containing the metal block to be plated and the roll to be plated is set to be quite large according to the maximum diameter of the roll to be plated. When plating rolls, current flows around the rolls, so the current density becomes low and plating takes time, so high-speed plating is desired. To perform high-speed plating, it is possible to increase the current density by increasing the voltage, but increasing the voltage increases power consumption, increases running cost, and requires a booster.
Furthermore, when the voltage is increased, a boundary layer of ions is generated on the surface of the roll to be plated, making it difficult to perform plating.

<Object of the invention> The present invention was devised in view of the above points, and
The current density can be increased without increasing the voltage, and the plating liquid with low fatigue can be supplied to the surface of the roll to be plated.It can be used at high speeds at the same voltage as before without creating a boundary layer of ions on the surface of the roll to be plated. It is an object of the present invention to provide a roll plating device that can perform plating and can also realize stronger high-speed plating without generating an ion boundary layer even when an extremely high voltage is applied.

<Structure of the Invention> The present invention provides a plating tank, a plating liquid regeneration circulation device that collects and regenerates the plating liquid in the plating tank, and returns it back into the plating tank, and a plating liquid regeneration circulation device that is provided integrally with the plating tank or can be lifted and separated, and is used for plating. a roll chuck rotating means for supporting and rotating the end of the roll so that the roll is immersed in the plating solution;
In a roll plating device equipped with an unmelted metal basket installed in a plating tank and containing a metal lump to be plated, when the unmelted metal basket is opened and a roll to be plated is stored, the basket moving means moves the roll to be plated. The basket is provided so as to sandwich the rolls in a non-contact manner, and is further equipped with a plating liquid injection pipe in the basket so that the recycled plating liquid is directly injected onto the roll to be plated.

Therefore, the end of the roll to be plated is supported and rotated so as to be immersed in the plating liquid, the plating metal lump is accommodated in an insoluble metal basket in the plating liquid, and the plating liquid is transferred to the plating tank and the plating liquid regenerating device. By circulating the plating liquid between the plating liquid and plating the roll to be plated, by bringing the basket closer to the roll to be plated, the current density is increased without increasing the voltage, and the recycled plating liquid is placed in the basket. By spraying the plating liquid directly onto the roll to be plated from the plating liquid injection pipe,
A plating liquid with a low fatigue level can be supplied to the surface of the roll to be plated, and high-speed plating can be performed without forming a boundary layer of ions on the surface of the roll to be plated.

The above-mentioned plating liquid injection pipe has a jetting port elongated in the length direction of the roll so that the plating liquid is uniformly sprayed over the entire length of the roll to be plated. On the other hand, it is preferable that the injection ports are provided in a line parallel to the roll at the required position closest to the roll. The insoluble metal basket has a side opposite to the plating roll that is formed into a closed surface so that the jet flow flows through the gap between the basket and the plating roll after hitting the plating roll. It is preferable to be there.

<Example> Hereinafter, an example of the roll plating apparatus of the present invention will be described with reference to FIG.

In this roll plating device, a pair of roll chuck rotating means 1 are provided on opposite sides of a plating tank 2, or the roll chucks R are mounted on the plating tank 2 so as to chuck the rolls R to form a cassette independent of the plating tank 2. A pair of side frames are provided at both ends of a lifting frame (not shown) to support the plating roll R horizontally at both ends, and the roll R is immersed in the plating liquid in the plating tank 2 and rotated. A pair of unmelted metal baskets 3, 3 provided in the plating tank 2 sandwich the plating roll R, which is supported and rotated by the roll chuck rotation means 1, in a non-contact state. Plated liquid injection pipe 4,
Reference numeral 4 denotes a configuration in which plating liquid regenerated from a plating liquid regeneration and circulation device (not shown) is directly injected onto the roll R to be plated.

The upper ends of the insoluble metal baskets 3, 3 are open so that a plating metal lump such as a copper ball can be input, and the inner wall of the basket facing the plating roll R is approximately equal to the maximum diameter of the plating roll R. It has a concave surface with a circular radius, and the wall portions other than the inside wall of the cage facing the roll R to be plated are sealed with a plate 3a. The insoluble metal baskets 3, 3 serve as anode electrodes, are made of an insoluble metal such as titanium, and are connected to a positive power source. The insoluble metal baskets 3, 3 are held midway inside of insoluble metal swinging arms 5, 5 whose lower ends are pivotally connected to the bottom of the plating tank 2, and the basket movable cages are connected to the upper end of the arms 5. It is swung by means 6 to sandwich the plating roll R in a non-contact manner. The cage moving means 6 has a rack 6b whose lower surface is received by a roller 6a, and an adjustable connector 7 is attached to the tank inner end of the rack 6b.
The pin of this connector 7 is slidably engaged with the elongated hole 8a of the engagement tool 8 fixed to the upper end of the arm 5, and the pinion 6c that engages with the rack 6b is connected to a motor (not shown) or It is rotated by a driving source such as a cylinder device, and before the roll chuck, the insoluble metal basket is opened at the 3', 3' position, and after the roll chuck, the plating roll R
The rack 6b is stroked so as to approach the rack 6b. Regardless of the diameter of the roll R to be plated, the pinion 6c detects when the gap between the basket and the roll becomes 1 to 2 mm.
In order to automatically stop the rotation of the drive source of the plating liquid, a gap sensor such as a proximity sensor or a phototube switch is installed near the plating liquid injection pipe 4, or a gap sensor such as a phototube switch is installed to detect pressure changes or flow changes caused by direct injection of the plating liquid onto the roll. A fluid condition change sensor is provided. (This sensor is not shown). The connecting tool 7 has a structure in which the length of the spring 7b can be adjusted by tightening or loosening a nut 7a, and engages and supports the upper end of the arm 5 while biasing it in the direction of the roll to be plated. Even if the pinion 6c stops rotating at the position where the basket negotiates with the roll, the spring 7b balances the reaction force of the plating liquid jetted from the plating liquid injection pipe 4 and prevents the gap between the basket and the roll. It is now possible to secure double amounts. The plating liquid injection pipes 4 provided in the insoluble metal baskets 3, 3 are branched at required equal intervals in the roll length direction from a header 9 provided so as to be held on the outside of the baskets, and are arranged in number so as to pass through the baskets. Available, injection port 4a
is formed into a long strip in the length direction of the roll,
It faces the required position closest to the roll to be plated, and the plurality of injection ports 4a on one side are arranged in a line parallel to the roll. The header 9 is connected to a plating liquid supply port 11 provided on the side surface of the plating tank 2 via a flexible pipe 10, and the plating liquid supply port 11 is connected to a plating liquid regenerating and circulating device (not shown). are now being supplied. Note that a stirring device is provided at the bottom of the plating tank 2 if necessary.

Next, to describe the action, when the plating liquid in the plating tank 2 has descended,
A roll R to be plated is suspended in a plating tank 2, and both ends are chucked by a roll chuck rotating means 1. After that, when the start switch is turned on, a plating liquid regeneration and circulation device (not shown) is activated, and the regenerated plating liquid is injected from the plating liquid injection pipe 4, and the liquid level of the plating liquid accumulated in the plating tank 2 rises. , the roll R for plating is completely immersed. Next, the roll chuck rotating means 1 is driven to rotate the roll R for plating, and electricity is applied to the insoluble metal baskets 3, 3 containing the copper balls to the anode, and the roll R to be plated to the cathode. Subsequently, the basket moving means 6 is operated, and the insoluble metal baskets located at positions 3' and 3' are closed so as to approach the roll R to be plated, and the roll diameter is reached to the maximum due to the action of the sensor. When the roll diameter is the minimum, it stops at the position 3,3 shown by the solid line, and when the roll diameter is the minimum, it stops at the position 3'',3''. In this way, when the insoluble metal baskets 3, 3 approach the plating roll R, the current density increases and high-speed copper plating is performed. Further, when the insoluble metal baskets 3, 3 approach the roll R to be plated, the plating liquid injection pipe 4 also approaches the roll R to be plated, and sprays the recycled plating liquid directly onto the surface of the roll R to be plated. Inject. The ionic boundary layer that occurs on the surface of the roll to be plated and prevents plating occurs when the plating voltage is high or the plating liquid becomes fatigued, but in the present invention, the surface of the roll to be plated is regenerated. Since the plating liquid is directly injected, the generation of an ion boundary layer can be effectively suppressed even at high current density, and the ion density is substantially increased by the direct injection of the regenerated plating liquid. Since the injection ports 4a of the plating liquid injection pipe 4 are arranged in a long and narrow line facing the rolls in parallel, the plating liquid that is directly injected onto the roll R to be plated can be applied even when the roll R to be plated is completely immersed. It sprays evenly evenly, evenly suppressing the formation of ion boundary layers, allowing for more reliable high-speed copper plating. In addition, since the sides of the insoluble metal baskets 3, 3 opposite to the roll R for plating are sealed with the plate 3a, the roll R for plating
When the roll rotation direction is rotated clockwise as shown by the arrow in the figure, the plating liquid sprayed directly onto the plating liquid flows along the roll surface of the roll R to be plated, that is, between the insoluble metal basket 3 and the roll R to be plated. The gap flows downward on the right side of the roll and upward on the left side,
This flow is passed around to the rolls,
It is disturbed inside the insoluble metal basket 3 having non-uniform resistance and comes into effective contact with the roll R for plating, so that uniform and effective high-speed copper plating can be performed. When the plating is completed, the jetting of the plating liquid is stopped, the cage moving means 6 is activated, and the insoluble metal cages 3 are opened. Thereafter, when the liquid level drops, the chuck release switch is pressed to release the chuck on the roll chuck rotating means 1, and the roll R to be plated is lifted above the plating tank 2.

<Effects of the Invention> As explained above, the present invention supports and rotates the end of the roll to be plated so as to immerse it in the plating liquid, and stores the plated metal lump in the metal basket in the plating liquid. In a roll plating device that circulates plating liquid between a plating tank and a plating liquid regenerating device to plate a roll to be plated, the roll to be plated is sandwiched between an openable and closable basket, and the plating provided in the basket is Since the plating liquid recycled from the liquid injection tube is directly injected onto the roll to be plated, the electrodes are brought close together to prevent an ion boundary layer from forming on the roll surface and the current density is increased without increasing the voltage. It is possible to perform high-speed plating with the same voltage as conventional methods, and even if high voltage is applied, no ion boundary layer is created due to the direct injection of the plating liquid, increasing the ion density, making it possible to perform more powerful high-speed plating. can be realized.

In addition, if the injection ports of the plating liquid injection pipe are formed long in the length direction of the roll, and the injection ports are arranged in a line parallel to the roll, the injection ports will be uniformly spread over the entire length of the roll to be plated. The plating liquid can be injected, the generation of ion boundary layers can be evenly suppressed, and more reliable high-speed plating can be achieved.

In addition, if the surface of the metal basket opposite to the roll to be plated is sealed with a plate, the jet stream will flow through the gap between the basket and the roll to be plated after hitting the roll to be plated, effectively You can make a nice Metsuki.

[Brief explanation of the drawing]

FIG. 1 is a schematic longitudinal sectional front view of the roll plating device of the present invention. R... Roll for plating, 1... Roll chuck rotating means, 2... Plating tank, 3, 3... Insoluble metal basket, 4, 4... Plating liquid injection pipe, 4a
. . . injection port, 6 . . . basket moving means, 11 . . . plating liquid supply port, and plating liquid regeneration and circulation device are not shown.

Claims (1)

[Scope of Claims] 1. A plating tank, a plating liquid regeneration circulation device that collects and regenerates the plating liquid in the plating tank and returns it to the plating tank, and a plating liquid regeneration circulation device that is provided integrally with the plating tank or can be lifted up and separated, and a roll to be plated is installed. In a roll plating device equipped with a roll chuck rotating means for supporting and rotating the end of the roll so as to be immersed in the plating liquid, and an insoluble metal basket provided in a plating tank and accommodating a plating metal lump, the insoluble metal basket is opened. When the roll to be plated is stored in the state, the basket moving means is provided to sandwich the roll to be plated in a non-contact manner, and the plating is carried out in the basket so that the recycled plating liquid is directly sprayed onto the roll to be plated. A roll plating device characterized by being equipped with a liquid injection pipe. 2. In the roll plating device according to claim 1, the plating liquid injection pipe has an elongated injection port in the length direction of the roll, and is closest to the roll to be plated of the insoluble metal basket. A roll plating device in which injection ports are arranged in a line parallel to the rolls at required positions. 3. The roll plating device according to claim 1, wherein the insoluble metal basket has a side portion opposite to the roll to be plated formed into a closed surface shape.