JPH0791679B2 - Automatic plating equipment for plate products - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic plating apparatus for plate-shaped products.

[0002]

2. Description of the Related Art For example, when plating the surface of a printed wiring board, the front and rear steps are performed in a relaxed manner, and the board is laid on a conveyor or the like (horizontal type). In the plating step, the board is manually suspended or cured. I try to remove it from the tool.
If the human hands are not required, leave the substrate on the conveyor even in the plating process and pass it through the plating solution.

[0003]

The above-mentioned method of manually attaching and detaching the substrate to the jig or the like is labor-intensive, and it is necessary to prepare a large number of jigs and the like according to the dimensions of the substrate. In addition, the automated method of advancing the plating tank in a horizontal posture laid on a conveyor without using human hands has a disadvantage that the plating tank must be remarkably longer than when it is attached to a jig. This invention, as an automatic plating apparatus for plate-like products such as printed wiring boards, does not use manpower and jigs, and the development of an automatic plating apparatus that does not require a long plating tank as in the past is considered as a main problem. Solved.

[0004]

SUMMARY OF THE INVENTION An automatic plating apparatus for plate-shaped products according to the present invention has a flat inlet and outlet for receiving and sending the plate-shaped products in a lying position, and the flat inlet and outlet are deeper than the length in the traveling direction of the products. Plating tank provided under the liquid surface of Saano, the above-mentioned inlet,
Inside each of the outlet tanks, a horizontal conveyor that is longer than the length of the product in the traveling direction, and an ascending / reversing part is placed facing the tip of the inlet side conveyor and descends facing the rear end of the outlet side conveyor. With a reversing part, a circulation zone that reciprocally circulates in the product advancing direction, and tooth materials that are lined up on the entire front side of the circulation zone with a mutual gap slightly larger than the product thickness,
The product entered from the inlet is placed in the vertical position by inserting the tip between the tooth materials of the circulation zone, goes up in the vertical position, is laid down horizontally near the outlet, and is conveyed by the conveyor. In the automatic plate-shaped product plating apparatus characterized by the above, a vibrating mechanism for vertically vibrating is provided on the outward path of the circulation zone for advancing the product in a vertical posture. The plate-shaped product automatic plating apparatus of the present invention is a plating device in which flat inlets and outlets for receiving and sending plate-shaped products in a lying position are provided below the liquid surface at a depth not less than the length of the product in the traveling direction. The tank, the inlet, the inside of each of the outlet, a horizontal conveyor provided longer than the length of the product in the traveling direction, and a rising reversal unit is placed facing the tip of the inlet side conveyor, and the outlet side conveyor With a descending reversing part facing the rear end, a circulation zone that reciprocally circulates in the product advancing direction, and tooth materials that are lined up on the entire front side of the circulation zone with a mutual gap slightly larger than the product thickness The product entered from the inlet is placed in the vertical position by inserting the tip between the tooth materials of the circulation zone, advances in the vertical position, is laid down horizontally near the outlet, and is carried out by the conveyor. Of the plate-shaped product characterized by In the plating apparatus,
The plating liquid returned to the plating tank by the reflux pump is evenly distributed to almost all products on the circulation zone from the multiple injection ports of the liquid injection pipe horizontally installed on one inner wall along the product traveling direction of the plating tank. Characterized by spraying.

[0005]

[Function] The product inlet and outlet of the plating tank are provided deep enough below the liquid surface, and the horizontal position product entered from the inlet and outlet is the tooth material of the rising and inverting part of the circulation zone at the tip of the conveyor. Inserted between them, the posture is changed from horizontal to vertical with the tooth material in the form of being held by the tooth material, and the forward path is advanced in that posture. When changing the posture, the size is such that the rear end of the product does not stick to the inlet and the upper end does not come out of the liquid surface. When the above conveyor conveys one product, if the circulation zone is rotated by one pitch of the tooth material, the products are lined up on the outward path of the circulation zone with a mutual gap of the thickness of the tooth material. Proceed and take the time required for plating towards the exit. Then, the product is laid down on the conveyor at the descending and inverting part of the circulation zone and is carried out to the exit. By applying vertical vibration to the outward path of the circulation zone, the bubbles attached to the product can be floated and removed. When the plating solution flowing back to the plating tank is sprayed from the spray pipe along the inner wall of the tank toward the product on the circulation zone, the plating solution in the product gap is constantly updated.

[0006]

1 and 2 show an embodiment of the present invention. Reference numeral 1 is a plating tank, 2 is a horizontal conveyor, 3 is a circulation zone, 4
Indicates a tooth material, P indicates a plate-shaped product, and L indicates a plating solution. The plating tank 1 has a product inlet 1a and an outlet 1b, both of which are located at the water depth d of the plating solution L, which is a depth equal to or longer than the length a of the product P in the traveling direction. Horizontal conveyor 2 at the entrance and exit
Also has a length b that is greater than or equal to the length a of the product P in the traveling direction. Due to these relational dimensions, when the product P that has entered the tank from the inlet 1a in a horizontal posture swirls and changes to a vertical posture and advances, the upper end does not go out of the liquid surface of the plating liquid L, and when it exits from the outlet 1b. You can change to a horizontal position without any problem.

It is known that a plate-like product sent in a horizontal posture is gripped between tooth materials in a circulation zone one after another and then moved to a vertical posture for use in a drying facility or the like.
In this invention, the circulation zone is provided in a plating tank having an entrance below the liquid surface, and the automatic jig for plating is used for the first time. is there.

When the above circulation zone is used as an automatic jig for plating, plate-like products standing in close proximity to each other progress in a direction perpendicular to the plate surface, which is a fatal drawback that the plating solution between products is easily deteriorated. was there. On the other hand, the present inventor provided one or a plurality of horizontal in-liquid injection pipes 18 along the inner wall of the plating tank in accordance with the height of the product P, and uniformly plated all the products from the numerous injection ports. By spraying the liquid, the above drawbacks were eliminated. The plating solution extruded from the circulation pump 7 of FIGS. 1 and 2 is blown out through the parent pipe 7a and from the innumerable jet ports of the four jet pipes 18 which are the branch pipes in the tank, as shown in FIG. While attracting the liquid on one side of the plating tank 1, all products P
Passing through the mutual gap of the above, move to the opposite side, move upward, and fall from the overflow port 19 at the upper part of the plating tank 1 to the outside of the tank. In this example, the overflow port 19 is provided on an adjustment plate 20 that can be adjusted up and down along the tank wall, and is located at a height of 10 cm above the upper end of the product P that is going upright.

The support wheel 10 of the circulation zone 3 in the plating tank 1, the drive wheel 10 ', its shaft support, and the drive mechanism are not much different from those of the conventional drying equipment, and the drive shaft 11 (see FIG. 3) is Since the intermediate portion is simply passed through the tank, detailed description is omitted.
The same applies to the horizontal conveyors 2 and 2, but the drive part thereof is interlocked with the drive part of the drive vehicle 10 'so that when the conveyor 2 feeds one product P, the tooth material 4 of the circulation zone 3 advances one pitch. It is synchronized. As a result, the products P sent one after another stand side by side through the tooth material 4 and head for the exit 1b over a required time. In addition, when the friction between the product P and the conveyor 2 is small due to the buoyancy and the product tip does not sufficiently enter between the tooth materials 4 and 4, the product P is moved by the liquid flow or the air flow.
Just press it on. The plating solution L goes out of the tank through each overflow port 19 and the product inlet 1a and the outlet b, collects in the storage tank 6 from the downflow pipe 5a of the outer shell tank 5, and is returned into the tank through the parent pipe 18 by the pump 7. .

The reason why the circulation zone is used as the automatic jig for plating is not only to shorten the length of the plating tank but also to improve the plating quality. It has the great convenience that it is possible to prevent the quality deterioration of dozens of products during plating due to bubbles only by vertically vibrating the outward path of one circulation zone. FIG. 3 shows the support wheel 10 of the circulation zone 3 and the shafts 11 and 1 of the drive wheel 10 '.
1'is an explanatory view of an embodiment in which both ends of the 1'exposed to the outside of the tank are supported by U-shaped bearings 12, and each shaft is vertically vibrated by the rotation of a wheel 13 with different diameters. In FIG. 1
Pressing 5 FIG. 4 shows an embodiment in which the support wheel 10 and the drive wheel 10 'are not touched, and the lower surface of the outward path of the circulation zone 3 is directly hit by the rotation of the different diameter wheel 16, and the different diameter shafts 16 are outside the tank. It is interlocked by 17.

(Experimental Numerical Values) The length of the outward path of the circulation zone 3 in FIG. 1 is 1000 mm, the length b of the conveyor 2 is 550 mm, and the size of the product P is 300 × 30.
The product P, which is a printed wiring board, is solder-plated with 0 × 1.6 mm, the thickness of the tooth material 4 is 22 mm, and the mutual gap is 2 mm. The electroless solder plating liquid L in the plating tank 1 is 75
It is heated to ℃, and flowed out from each overflow port 19 (the amount of outflow from the product inlet 1a and the outlet 1b is small) at about 2.3 m / min,
The plating operation was performed for 30 minutes while refluxing with the pump 7 to maintain the liquid surface.

Since the first 15 minutes were spent in successively feeding the products P into the tank, the first 15 sheets of the product P were plated, and 15 minutes were taken from the tank 1 as a nail. The number of processed sheets was 40. 330 x 330 mm ²
Of 40 wiring boards, that is, the area of 4.4m ² of solder plating was done in a small plating tank with a length of over 2m, which is 1/10 the volume and floor area of the conventional plating tank. Is. In the experiment of giving vertical vibration to the outward path of the circulation zone 3, the obtained plating tank has a beautiful surface without pinholes or patterns due to air bubbles
The fluorescence and X-ray film thickness measurement results were also satisfactory. Although the embodiments have been described above, the present invention can be variously modified and applied by a practitioner without changing the gist thereof.

[0013]

EFFECT OF THE INVENTION The present invention relates to a plate material carrying mechanism which has been used mainly as a drying facility and which uses a circulation zone.
For the first time, we opened a way to take it into the bath as an automatic jig for plating. This new automatic plating system eliminates the need for a large number of jigs that depend on the size of the product and the labor required to mount the product on the jig.In the case of automation, the product is laid on a conveyor in the plating tank. In order to proceed side by side, it took an extremely long plating tank to take the required plating time, but one tenth of the length was sufficient. Plate-shaped products on the circulation zone are lined up so that they overlap each other in the front and back direction and proceed in a direction perpendicular to the plate surface, so drying is acceptable, but when plating is intended, the plating solution between products tends to deteriorate. There was a fatal problem. According to the present invention, an in-liquid injection pipe is horizontally provided on one inner wall of the plating tank to uniformly spray the reflux plating solution to all products and to pass through to the opposite side, so that each product is always in contact with the updated plating solution, Improved plating efficiency. Further, the circulation zone of the present invention is suitable not only for shortening the length of the plating tank but also for lifting and removing air bubbles adhering to the product by adding a vertical vibration device, which is also effective for improving the plating quality. It proved that it was.

[Brief description of drawings]

FIG. 1 is an elevational view for explaining an embodiment of the present invention.

FIG. 2 is a side view of the same.

FIG. 3 is an elevational view for explaining an embodiment of a circulation zone excitation device.

FIG. 4 is an elevation view of the other embodiment.

[Explanation of symbols]

 1 Plating Tank 2 Horizontal Conveyor 3 Circulation Zone 4 Tooth Material 13 Excitation Mechanism (Variable Wheel) 16 Vibration Mechanism (Differential Wheel) 18 Jet Pipe

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Office reference number FI technical display location C25D 21/10 301 301 302 // H05K 3/18 Z 7511-4E

Claims (2)

[Claims] 1. A plating tank in which a flat inlet and outlet for receiving and delivering a plate-shaped product in a lying position are provided below the liquid surface at a depth equal to or longer than the length of the product in the traveling direction, and the inlet and outlet. Inside each tank, a horizontal conveyor that is longer than the length of the product in the traveling direction, and a rising and inverting section facing the tip of the entrance side conveyor, and descending facing the rear end of the exit side conveyor. A product that enters through the inlet is equipped with a revolving zone that has a reversing part and reciprocally circulates in the product advancing direction, and tooth materials that are lined up on the entire front side of the revolving zone with a mutual gap slightly larger than the product thickness. Is characterized in that its tip is fitted between the tooth materials of the circulation zone and is raised in a vertical posture, then advances inside the tank, is laid down in a horizontal posture near the outlet, and is carried out by a conveyor. In automatic plating equipment for plate products The forward of the circulating band to advance the goods in vertical position, automatic plating apparatus of the plate-like products, characterized in that it comprises a vibration mechanism providing vertical vibration. 2. A plating tank provided with a flat inlet and outlet for receiving and delivering the plate-shaped product in a lying position and below the liquid surface having a depth equal to or longer than the length in the traveling direction of the product, and the inlet and outlet. Inside each tank, a horizontal conveyor that is longer than the length of the product in the traveling direction, and a rising and inverting section facing the tip of the entrance side conveyor, and descending facing the rear end of the exit side conveyor. A product that enters through the inlet is equipped with a revolving zone that has a reversing part and reciprocally circulates in the product advancing direction, and tooth materials that are lined up on the entire front side of the revolving zone with a mutual gap slightly larger than the product thickness. Is characterized in that its tip is fitted between the tooth materials of the circulation zone and is raised in a vertical posture, then advances inside the tank, is laid down in a horizontal posture near the outlet, and is carried out by a conveyor. In automatic plating equipment for plate products The plating liquid returned to the plating tank by the diversion pump is uniformly sprayed to almost all products on the circulation zone from the multiple injection holes of the liquid injection pipes horizontally installed on one inner wall along the product traveling direction of the plating tank. An automatic plating device for plate-shaped products characterized by being attached.