JPH04176895A - Surface treatment for micropart - Google Patents

Abstract

PURPOSE:To stick a surface treating liquid into the inside surfaces of microspaced recessed parts by fitting sheet-shaped guides into the inside surfaces of the respective recessed parts of a transferred part to be treated and bringing the sheet-shaped guides and the inside surfaces of the recessed parts into contact via a liquid impregnating body. CONSTITUTION:A driving roller 2 is supported in parallel below the sheet-shaped guides 1. The liquid impregnating body 3 consisting of a bendable band-shaped body having chemical resistance is wound between the sheet-shaped guides 1 and the driving roller 2. Many nozzles 4a are bored and provided as means 4 for supplying the surface treating liquid B around the liquid impregnating body 3. The surface treating liquid B is supplied from the nozzles 4a to the upper part of the liquid impregnating body 3 and is impregnated therein. While the blank material A to be surface-treated is horizontally transferred, the driving roller 2 is rotated and the liquid impregnating body 3 is moved. The surface treating liquid B is successively supplied between the upper parts 1a of the sheet-shaped guides 1 and the inside surfaces 1a of the recessed parts of respective connectors and the surface treating liquid B is stuck to the inside surfaces A1 of the respective recessed parts, by which the inside surfaces are plated.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a micro-part surface treatment device that performs surface treatment such as fine plating, peeling, or cleaning on desired locations of electrical contact members such as connectors and switches; Specifically, it relates to a method in which a material to be surface treated is linearly transported in one direction, and a liquid impregnated body impregnated with a surface treatment liquid is brought into contact with a microscopic surface treatment portion of the material to be surface treated to perform a microscopic surface treatment.

<Prior art> Conventionally, as disclosed in Japanese Patent Application Laid-Open No. 63-286593, this type of micro-part surface treatment apparatus has been developed by using a large number of small diameter metal wires loosened in a spiral shape and having an insulating material on the outer peripheral surface. A linear body is wound at appropriate intervals to form a liquid-impregnated body with an uneven surface, and by applying an anode to this liquid-impregnated body and driving it to rotate, the surface is immersed in the plating liquid sprayed from a nozzle. The plating liquid is guided by the linear body to the outer circumference of the liquid-impregnated body, and is transferred while contacting the outer circumferential surface of the liquid-impregnated body. There are some that have a special plating applied to them.

<Problems to be Solved by the Invention> However, in such conventional micro-part surface treatment devices, the liquid-impregnated body spirally surrounds a large number of metal wires, and the linear bodies are wound around the outer peripheral surface of the liquid-impregnated body. Therefore, even if the diameter is minimized, it is limited to about 2 mm, so if it is only a minute surface treatment part of the material to be surface treated or the inner surface of a recess with a spacing of about 1 mm or less as shown in Figure 1, However, there is a problem in that it is not possible to apply a surface treatment liquid to only the inner surface of the recess for surface treatment.

Therefore, the surface treatment liquid was sprayed from the outside of the surface-treated material and passed around to the inside of the recess to treat the inner surface of the recess. Therefore, the surface treatment liquid was applied to areas other than the inner surface of the recess that did not require surface treatment. Not only does it adhere and waste, but additional surface treatment liquid is required, which increases the cost when plating uses expensive surface treatment liquid, and it also causes problems such as plating, etc. on the surface-treated material. If there are areas that do not want to be surface-treated, there is a problem in that it is necessary to mask them or to perform post-treatment such as peeling.

In view of such conventional circumstances, the present invention has an object to allow a surface treatment liquid to adhere only to the inner surface of a concave portion with a minute interval between minute surface treatment portions.

Means for Solving the Problems> The technical means taken by the present invention to solve the above problems is to approach the microscopic surface treatment portion of the material to be surface treated and move the thin plate guide in the direction of transport of the material to be surface treated. A drive roller is rotatably supported parallel to this ultra-thin guide plate in a direction perpendicular to the direction in which the material to be surface treated is transported.
A liquid-impregnated body made of a thin and bendable strip material such as cloth or resin net is wound from the drive roller to the thin-plate guide, and the thin-plate guide and micro surface treatment are applied via this liquid-impregnated body. It is characterized by bringing the parts into contact with each other.

<Function> According to the above-mentioned technical means, the present invention has a thin plate-like guide fitted into the inner surface of each concave portion to be transferred, so that these thin plate-like guides and the inner surface of each concave portion are connected to a liquid-impregnated body such as cloth or resin net. As the drive roller rotates, the surface treatment liquid impregnated into the liquid impregnated body is sequentially supplied to the inner surface of each recess.

<Example> Hereinafter, one embodiment of the present invention will be described based on the drawings.

In this embodiment, as shown in FIGS. 1 and 2, the surface-treated material A has a large number of fork-shaped connectors arranged in series at predetermined intervals, and the inner surface of the recess formed in the lower half of each connector is Micro surface treatment part A.

The material A to be surface treated is horizontally suspended along a horizontal holder C, and a cathode is applied to it, and it is horizontally transferred vertically and laterally by a feeding mechanism of a conventionally well-known structure, and each concave portion to be transferred is The inner surface A1 of each recess is brought into contact with the upper part of the thin plate-like guide 1 fitted with an anode and fitted into the recess through the insulating annular liquid-impregnated body 3, whereby the inner surface A1 of each recess is plated. It is intended to provide .

The thin plate guide 1 is a flat plate made of an electrode material such as stainless steel and has a thin wall thickness, and its upper end is formed into an arcuate cross section, and the upper part 1a is connected to the inner surface A1 of each recess.
and horizontally installed parallel to the holder C in the transport direction of the surface-treated material A.

Below the thin plate guide 1, drive rollers 2 are supported at appropriate intervals in parallel with the thin plate guide 1, and one end of the drive roller 2 is connected to a drive source such as a motor so as to be perpendicular to the transport direction of the surface-treated material A. Rotate freely in the direction you want.

An annular liquid-impregnated body made of a thin and bendable belt-like material such as a chemical-resistant cloth or a resin net made of nylon or the like extends from the upper end of the thin plate-shaped guide 1 to the outer surface of the drive roller 2. 3 is wound, and the rotation of the driving roller 2 causes the annular liquid-impregnated body 3 to move vertically immovably in the transport direction of the surface-treated material A over substantially the entire length of the upper edge of the thin plate-shaped guide 1.

Further, around the annular liquid-impregnated body 3, a large number of nozzles 4a are installed as supply means 4 for the surface treatment liquid B.
The nozzles 42 are opened at regular intervals in the lateral direction toward either the pair of opposing upper portions or one of the upper portions of The surface treatment liquid B, in the case of this embodiment, plating liquid, is supplied over the entire length, and a plurality of guide rollers 5 that come into contact with the liquid-impregnated body 3 are arranged horizontally so as to be adjustable and movable. Apply a constant tension to 3.

In such a micro-part surface treatment apparatus, the surface treatment liquid B is supplied from a large number of nozzles 4a to the upper part of the liquid impregnated body 3 to impregnate it, and in this state, the material A to be surface treated is horizontally transferred and driven. If the rollers 2 rotate in alternate directions or in one direction and move the annular liquid-impregnated body 3, the upper part 1a of the thin plate-shaped guide 1
and the inner surface A of the recess of each connector.
This surface treatment liquid B adheres to the inner surface A1 of each recess and performs the plating treatment.

Therefore, as shown in the figure, by supplying the surface treatment liquid B to both upper parts of the liquid-impregnated body 3 and rotating the drive roller 2 in alternate directions at regular intervals, uniform plating can be applied to both opposing sides of the inner surface A of each recess. I can do it.

Furthermore, although not shown, if the interval between the inner surfaces A1 of each recess is narrow, such as the gap between the wall thickness of the thin plate guide 1, or less, the inner surface A of the recess should not be pushed wide with the upper end of the thin plate guide 1. Perform surface treatment.

Next, what is shown in FIG. 3 is another embodiment of the present invention,
This guide is placed below the thin plate-like guide 1 and perpendicular to the direction of transport to the material to be surface treated.

Two drive rollers 2 are respectively supported parallel to the thin plate guide 1 at appropriate intervals in the direction, and these five drive rollers 2,
Both longitudinal ends of a liquid-impregnated body 3 made of a thin and bendable strip material such as cloth or resin net are fixed to the outer peripheral surface of each roller 2, and both drive rollers 2 and 2 are moved in the same direction in synchronization. By rotating, the liquid-impregnated body 3 moves and is wound around the outer peripheral surfaces of the drive rollers 2, 2.

Therefore, compared to the front claw embodiment, the one shown in FIG. 3 does not require forming the liquid-impregnated body 3 in an annular shape, reducing costs, and it also takes longer to replace the liquid-impregnated body 3, thereby saving labor and labor for replacing the liquid-impregnated body 3. can be converted into

In the front nail embodiment, the case where the surface treatment is plating treatment is shown, but the present invention is not limited to this. If a stripping liquid is supplied as the surface treatment liquid B, it will be a peeling treatment, and if a cleaning liquid is supplied, it will be a cleaning treatment.

Further, the arrangement of the drive rollers 2 and the supply means 4 for the surface treatment liquid B are not limited to those described above. For example, a plurality of drive rollers 2 rotating in opposite directions may be arranged alternately on each axis. The liquid-impregnated body 3 moving in the opposite direction is sequentially brought into contact with the inner surface A of each concave portion to be transferred, or the drive roller 2 is disposed in a tank containing the surface treatment liquid B, and the liquid-impregnated body 3 is injected with the surface treatment liquid. B may also be supplied.

<Effect of the invention> Since the present invention has the above configuration, it has the following advantages.

By fitting the thin plate-shaped guide into the inner surface of each concave portion to be transferred, these thin plate-shaped guides and the inner surface of each concave portion come into contact via a liquid-impregnated material such as cloth or resin net, and as the drive roller rotates, the liquid impregnates. Since the surface treatment liquid impregnated into the body is sequentially supplied to the inner surface of each recess, the surface treatment liquid can be applied only to the inner surfaces of the recesses where the minute surface treatment parts are spaced at minute intervals.

Therefore, surface treatment can be applied only to the inner surface of the recess with a distance of less than 1 edge, and compared to the conventional method in which the surface treatment liquid is sprayed from the outside of the material to be surface treated and circulated around the inside of the four parts, the surface treatment The amount of treatment liquid used is minimized, which can significantly reduce costs when using expensive surface treatment liquids, and there is no need for masks or post-treatment if there are areas of the surface-treated material that do not want to be surface-treated. It can make your work easier.

[Brief explanation of drawings]

FIG. 1 is a longitudinal cross-sectional side view of a micro-part surface treatment apparatus showing one embodiment of the present invention, FIG. 2 is a longitudinal cross-sectional perspective view of the same, and FIG. FIG. A... Material to be surface treated A1... Micro surface treatment portion (inner surface of recess) B... Surface treatment liquid 1... Thin plate guide 2... Drive roller 3... Annular liquid impregnated body

Claims (1)

[Claims] A micro-part surface treatment device that linearly transports a material to be surface-treated in one direction, and performs micro-surface treatment by bringing a liquid-impregnated body impregnated with a surface treatment liquid into contact with the micro-surface-treated portions of the material to be surface-treated. In this step, a thin plate-shaped guide is installed parallel to the transport direction of the surface-treated material close to the microscopic surface-treated portion of the surface-treated material, and a drive roller is installed parallel to this ultra-thin guide plate to move the surface-treated material. A liquid-impregnated body made of a thin and bendable band-like material such as cloth or resin net is wound around the driving roller and a thin plate-shaped guide. A micro-portion surface treatment device characterized in that a thin plate-like guide and a micro-surface treatment section are brought into contact via this liquid-impregnated body.