JP2969112B1 - Method and apparatus for transporting plate-like object to be plated in continuous plating - Google Patents

Abstract

Abstract: PROBLEM TO BE SOLVED: To secure stable operation in a continuous plating method for a printed circuit board or the like. SOLUTION: In a system in which an object to be plated 4 is loaded and retreated through a slit provided in a plating tank wall in a liquid-tight manner and is continuously plated, a delay in a transfer interval of the object to be plated 4 is detected by a detector 8. The result is sent to the arithmetic and detection instructing device 9, and a stop command is issued to a predetermined portion of the driving device from the arrow 10, thereby stopping the transfer of the plating object 4 after the trouble occurrence portion, and removing the trouble plating object. A method for resuming the transfer after the removal and a device used for the method.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for transporting a plate-like object in a system for continuously plating a plate-like object such as a printed circuit board.

[0002]

2. Description of the Related Art Conventionally, when plating an object to be plated,
A plurality of objects to be plated are fixed on a frame connected to the cathode with a fixing tool.
Individually mounted and removed one by one after plating is completed.
This method is a troublesome operation, and is a factor that hinders the efficiency of the plating operation. In recent years, in recent years, objects to be plated have been individually and continuously supplied one by one into the plating tank while avoiding the work of fixing the objects to the frame, and the inside of the plating tank has been horizontally moved and moved. A method for performing efficient plating has been proposed.

However, there are various sizes of the objects to be plated, and in order to perform plating evenly on all of them, fine adjustment of plating conditions such as arrangement of electrodes, adjustment of liquid level, and current density is required. Is a difficult problem to do. Therefore, the present inventor has developed a method in which the plate-like object to be plated is vertically supplied and is continuously supplied to the plating tank,
The above problems were solved. FIG. 3 and FIG. 4 of the A-A cross section thereof are schematic explanatory views, in which a plating bath 1 is filled with a plating solution 2 (see FIG. 4), and a plurality of anodes 3 are added to the plating solution 2. It is installed so as to be immersed.

An object to be plated 4 is supplied from a pretreatment tank (not shown) provided in front of the plating tank 1 to rotating rollers 5 and 5.
5 are continuously inserted into the plating tank 1 through the slits 6 while being sandwiched by both sides. Then, while passing through the plating tank 1, an electric current is passed between the anode 3 and the cathode roller in which a part of the rotating roller 5 is changed, so that both surfaces of the object 4 are plated. The plated object 4 having been plated is conveyed from the slit 6 on the opposite side to a post-treatment tank (not shown). Appropriate squeezing rollers 7 are provided in the inlet and outlet slits 6 so as to be liquid-tight.

[0005]

The method of plating a plate-shaped object to be plated by continuously transporting the plate-shaped object vertically and at a constant interval into a plating tank is known. Although it is possible to cope with the problem and the work of attaching and detaching the object to and from the frame is unnecessary and efficient, there is a possibility that a problem may occur in transporting the object to be plated. That is, as shown in FIG.
B, C, D, E... Are arranged at a predetermined interval m (for example, in the case of a printed board, there are suitable conditions depending on the transfer speed, the thickness of the board, the thickness of the plating, the height of the board, etc., but usually 3 to 90 m).
m, more preferably 5 to 35 mm), and the sheet is continuously transported. However, as in the case of the object to be plated B 'shown by a dotted line, a problem occurs in the feeding due to the state of the rail or the state of the rotating roller. Sometimes. That is, there is an interval n that is equal to or longer than the predetermined interval between B ′ and A, and the interval between C and the following C is lost, and in some cases, the ends overlap. Occurs. Since such a phenomenon becomes a problem for continuous plating,
The present invention is intended to address such a problem.

[0006]

A first object of the present invention is to move a plate-like object to be plated, which is vertically mounted on a rail, while holding the plate-like object from both sides by a vertical rotating roller including a driving roller. In a method of feeding continuously into the tank at a fixed interval through a slit provided in the wall of the tank and applying plating, and then sending it out of the tank through the slit provided in the wall of the plating tank in the same manner, a plate-like material to be plated Is transported at a predetermined interval from the preceding plate-shaped object to be plated, and the interval is automatically measured using an interval measuring means. A method of transporting a plate-like object in continuous plating, wherein the plate-like object to be plated is stopped, transport is resumed after returning to a normal position.

In the present invention, the distance between the objects to be plated is usually 3 to 90 m for a general printed circuit board as described above.
m, more preferably 5 to 35 mm, but the allowable value of the change in the interval is within 25%. In other words, when the interval between the objects to be plated is more than 25%, the plating state is adversely affected, and overlapping, breakage and other troubles are caused. Therefore, in the present invention, the change in the interval is sensed by the sensor, and the subsequent plating object is stopped. At this time, the preceding object to be plated continues normal progress. The stopped plating object is immediately returned to a normal position or removed, and transport is resumed.

In the second aspect of the present invention, a rail for vertically placing and transporting a plate-like object to be plated is disposed so as to penetrate the bottom of the plating tank, and the penetrating portion is provided together with a passage portion of the plate-like object to be plated. A liquid-tight slit is provided.Rotating rollers are provided at regular intervals on both sides of the rail, and a detecting device for the distance between plate-like objects to be plated is provided at least in proximity to the rotating roller on at least one side. A plate in continuous plating, comprising a sensor, a calculation and a detection instruction device as a mechanism for receiving a signal when the distance between the objects to be plated is larger than an allowable value and stopping a subsequent plate-shaped object to be plated. It is a device for transporting an object to be plated.

As a device for detecting the distance between plate-shaped objects to be plated, there are an optical fiber sensor, an optical fiber sensor and a limit switch, and the optical fiber sensor has obtained particularly good results. It is preferable that the position at which the detection device is mounted functions for all sizes regardless of the size of the object to be plated. The area near the lower rail through which each plated material must pass is good. The height is at least a position lower than the minimum height in the plating object which is expected to pass. The mounting interval of the detection device is a distance by which it can be recognized that the subsequent plating object has exceeded the interval allowable range.

[0010] Passing information of the object to be plated detected by the detecting device is collected by a calculation and detection instructing device (computer device), and is compared with proper interval information registered in advance therein. For example, an instruction to stop the conveyance of the object to be plated after the detection point is automatically issued to the driving device.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be specifically described based on embodiments. As shown in FIGS. 3 and 4, the inlet and outlet of the plating tank 1 are liquid-tightly formed with a squeezing roller 7, and a plate-like material to be plated 4 is automatically supplied to the plate at a constant interval. . The transport of the plating object 4 is performed by pressing the rotating rollers 5 provided at predetermined intervals against both surfaces of the plating object 4. The interval between the rotating rollers 5 is 100 mm. The object to be plated 4 suitable for supplying to this is 250 mm × 250 mm
It is a printed circuit board having a size of up to 510 mm × 510 mm. The transfer interval of each substrate is from 25 mm to 3
5 mm is appropriate. The transfer speed is 0.3m / min ~
The substrate is plated in the plating tank 1 while being conveyed at 1.5 m / min. The plating is performed by partially using the rotating roller 5 as a cathode roller, thereby supplying electricity to the substrate to use the substrate as a cathode and flowing a current between the substrate and the anode 3.

FIG. 1 is an explanatory view showing a main part. An object to be plated 4 is conveyed on a rail 2 by a rotating roller 5 in the direction of a white arrow. Reference numeral 8 denotes a device for detecting the distance between the objects to be plated provided at equal intervals, and 9 denotes a calculation and detection instruction device. This calculation and detection instruction device 9 is formed by a usual computer technology.
It is designed to accumulate standard data, compare this with the detected data, and issue a stop command to the driving device at a predetermined position when the result is out of an allowable range. In FIG. 1, the detection device 8 marked with a black mark confirms the passage of the rightmost plated object 4, and then does not operate even if the subsequent plated object 4 ′ has passed the allowable range of the predetermined interval distance. When this is detected, the information is sent to the calculation and detection instruction device 9, compared with a standard value, and a stop command is issued at a predetermined position of the drive device by an arrow 10. By this stop command, the rotation of the rotating rollers 5, 5,... Following the black mark is stopped. The rotation rollers 5, 5,... Before the black mark continue to work to complete plating. On the stopped rotating roller side,
The plating object 4 'having the trouble is removed, and if the subsequent plating object 4 is affected, the removal is performed or the position is corrected, and then the operation is restarted. By doing so, damage can be minimized even in the unlikely event of an emergency.

If the mounting position of each rotating roller 5 is different between adjacent ones, the influence on the plating surface formation due to the contact of the rollers is diffused, and a uniform plating surface can be obtained as a whole surface. Can be. Further, changing the mounting position of each of the rotating rollers 5 can cope with any change in the height of the object 4 to be plated.

[0014]

According to the present invention, in a method of continuously plating a plate-like object to be plated such as a printed circuit board, a trouble can be quickly dealt with, and physical and temporal damage can be minimized. And the plating operation can be performed efficiently.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of a main part in an embodiment of the present invention.

FIG. 2 is an explanatory diagram of a trouble in a continuous plating apparatus.

FIG. 3 is a plan view illustrating a continuous plating apparatus to which the present invention is applied.

FIG. 4 is a sectional view taken along line AA of FIG. 3;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Plating tank 2 Plating solution 3 Anode 4, 4 'Plated object 5 Rotary roller 6 Slit 7 Squeeze roller 8 Detector 9 Calculation and detection instruction device 10 Stop instruction instruction arrow

Claims (2)

(57) [Claims] 1. A plate-like object to be plated vertically placed on a rail is moved from both sides by being sandwiched between vertical rotating rollers including a driving roller, and is fixedly spaced through a slit provided in a plating tank wall in a liquid-tight manner. In the method of continuously feeding into the tank with the plating, applying the plating, and then sending out the tank through a slit provided in the plating tank wall in a liquid-tight manner, the plate-shaped object to be plated and the preceding plate-shaped object to be plated are predetermined. It is transported at intervals, and the interval is automatically measured using an interval measuring means. When the interval is longer than an allowable value, it is automatically sensed to stop the subsequent plate-shaped workpiece, and the A method of transporting a plate-like object to be plated in continuous plating, wherein the transport is resumed after the position is corrected. 2. A rail for vertically placing and transporting a plate-shaped object to be plated is disposed so as to pass through the bottom of a plating tank, and the penetrating portion is made liquid-tight together with a passage portion of the plate-shaped object to be plated. With a slit, a rotating roller is provided at a fixed interval on both sides of the rail, and a detecting device for the distance between the plate-shaped workpieces is provided at least in close proximity to the rotating roller on at least one side, and between the continuous plate-shaped workpieces A plate-like plated object in continuous plating characterized by comprising a sensor, a calculation and a detection instruction device as a mechanism for stopping a subsequent plate-like plated object upon receiving a signal when the distance has opened beyond an allowable value. Transport device.