JPS58130266A - Uneven pattern forming method by plating - Google Patents

Abstract

PURPOSE:To form uneven patterns simply by plating by immersing a metallic body in plating liquid, bringing a matrix provided with uneven patterns on the surface into contact with the metallic body, contacting the convex part repeatedly and preventing adhesion of plating to the pressed part of the metallic body. CONSTITUTION:An electrode is provided in a tank 41 containing a plating liquid 4, and a cylindrical metallic body 3 is installed rotatably so that its lower part is immersed in the plating liquid 4. A supporting axis 12 is fitted into a through- hole 11 of a cylindrical matrix 1 having uneven patterns 2 on its outer peripheral face. An energizing device such as a spring is connected to the axis 12, and the matrix 1 is energized to the metallic body 3 to press it against the metallic body 3. When the metallic body 3 and the matrix 1 are rotated in the reverse direction at low speed, the convex part on the surface of the matrix 1 presses the metallic body 3, and obstructs progress of adhesion of plating to the pressed part. Accordingly, plating adheres little on the part of the metallic body 3 that comes into contact with the convex part of the matrix 1, and a thick layer of plating is formed on the part that comes into contact with the concave part.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for forming an uneven pattern on the surface of a metal body by plating.

The applicant has previously proposed a method of forming a pattern of depressions and depressions on the metal body that is opposite to the pattern of depressions and depressions on the surface of the metal body by immersing the metal body in a corrosive solution and repeatedly applying a pattern of protrusions and depressions on the surface of the metal body to the metal body. (Patent Application No. 56-68748).

The above method has the advantage of being able to easily form precise and deep uneven patterns, but when using a plate for embossing the processed metal object, the surface must be plated, which is a time-consuming problem. was there.

The present invention prevents the progress of plating on the parts of the metal body that are in contact with the convex portions of the matrix by repeatedly pressing a matrix with an uneven pattern on the surface against a metal body immersed in a plating solution. The purpose of this invention is to provide a method for forming an uneven pattern on a metal body due to variations in the thickness of a plating layer, and to simplify the processing process.

The present invention will be described in detail below based on embodiments shown in the drawings.

Figure 1 shows a matrix (1) used in the present invention, which is formed into a cylindrical shape from a resin or alloy that is not attacked by the plating solution, and has an uneven pattern (2) on its outer peripheral surface. .

When the uneven pattern (2) of this embodiment is expanded, it becomes, for example, a world map as shown in FIG. 2, in which the sea, plains, and mountains are precisely represented by unevenness. Any other uneven pattern, such as other textured patterns, can be implemented.

Figure 3 shows a metal body (3) to be machined, the diameter of the metal body (3) is approximately equal to the maximum diameter of the matrix (1), and the total length is equal to the total length of the matrix (1). equal.

The surface of the metal body (3) is subjected to activation treatment such as degreasing.The surface of the metal body (3) to be processed may be metal, and does not necessarily need to be made entirely of metal.

Figure 4 shows the processing method, in which an electrode (not shown) is placed in a tank f41) containing a plating solution (4) such as a copper sulfate solution, and the lower part of the metal body (3) is plated. liquid (4
) so that it can rotate freely.

The support shaft 02+ is fitted into the through hole Lll of the mother mold (1), and a biasing means (not shown) such as a spring is connected to the shaft 0z, so that the support shaft U2 and the mother mold (1) are connected to the metal body (3). ) and press it into contact with the metal body (3).

In the above state, either or both of the mother mold (1) and the metal body (3) are connected to a rotary drive device (not shown) and rotated at low speed in opposite directions.

If the diameter of the metal body (3) is about 50 mm, a rotation speed of 1 rotation every 3 to 5 seconds is sufficient.

At this time, the convex portion on the surface of the matrix (1) presses the metal body (3) and prevents the plating from adhering to the pressed portion of the metal body (3).

As the matrix (1) and the metal body (3) continue to rotate, a thick plating layer is formed on the surface of the metal body corresponding to the concave portion of the matrix (1), but the convexity of the matrix (1) Almost no plating adheres to the areas where the parts touch, and in the end, due to variations in the thickness of the plating layer, the metal body (3) has unevenness that is three-dimensional unevenness that is the opposite of the uneven pattern of the matrix (1). A pattern is formed.

In addition, if a liquid that inhibits plating adhesion, such as silicone oil, is applied to the matrix (1), the silicone oil will transfer to the part of the metal body (3) that is in contact with the convex part of the matrix (1). , and the ultrasonic effect on plating adhesion to the part is large,
A convex pattern between layers is clearly visible.

Also, the metal body (3) is immersed in the plating solution (4) without coming into contact with the matrix (1) to form a plating layer of uniform thickness on the surface of the metal body, and then the matrix (1) is coated as described above. It is also possible to perform plating while applying the metal to the metal body. In this case, the metal body (
3) No bare metal remains on the surface.

5 to 8 show other embodiments, and FIG. 5 shows a method of forming an uneven pattern on a cylindrical metal body (3) using a plate-shaped matrix (1).

A plate-shaped matrix (1) with an uneven pattern formed on its lower surface is connected to a horizontal reciprocating device (5), and is rubbed against the upper surface of a cylindrical metal body (3) whose lower half is dipped in a plating solution (4). , reciprocating repeatedly in the groove.

FIG. 6 shows a method of forming an uneven pattern on a plate-shaped metal body (3) using a plate-shaped matrix (1).

A plate-shaped matrix (1) with an uneven pattern formed on its lower surface is connected to a vertical reciprocating device 61), and is repeatedly pressed into contact with and separated from a plate-shaped metal body (3) immersed in a plating solution (4). 7th
The figure shows a method of forming an uneven pattern on a plate-shaped metal body (3) using a cylindrical matrix (+1).

A cylindrical master mold (1) having an uneven pattern formed on its outer periphery is rolled and reciprocated in the lateral direction over a plate-shaped metal body (3) soaked in plating f&+4+.

Figure 8 shows that the entire surface to be machined is thick (concave metal body (3)
shows a method of forming an uneven pattern.

The processed surface Gl) of the metal body (3) is recessed into a bowl shape at the same time as the metal body (3) is cast, or by pre-processing such as cutting.

The matrix (1) is bulged in correspondence with the large depression on the processed surface Gl+ of the metal body (3), and an uneven pattern (2) with a vertical slope is formed on the surface of the bulge U3).

The metal body (3) is immersed in the plating solution (4), and the master die (1) is repeatedly pressed against the surface to be processed of the metal body (3) by the up-and-down reciprocating device 6υ.

In the same manner as in the example, the matrix 11) on the surface of the metal body (3) is
The plating adhesion is inhibited in the areas corresponding to the convex parts, and the plating adheres thickly in the areas corresponding to the concave parts.
An uneven pattern is formed.

As described above, the present invention provides a matrix (
Repeat 1) to press the metal object (3) to remove the metal object (3).
) By creating variations in the thickness of the plating layer between the part where the convex part of the upper matrix touches and the other parts, it is possible to easily form a pattern in which the convexes and convexities are opposite to the concave and convex pattern of the matrix 1). However, it goes without saying that the present invention is not limited to the above-mentioned configuration, and that various modifications can be made within the technical scope of the claims.

[Brief explanation of the drawing]

Figure 1 is a slope view of the matrix, Figure 2 is a developed view of the surface of the matrix, Figure 3 is a slope view of the metal body, Figure 4 is an explanatory diagram of the plating method,
FIGS. 5-gJ8 are explanatory diagrams of other embodiments.

Claims (1)

[Claims] ■ By immersing the metal body to be processed in a plating solution, bringing a matrix with an uneven pattern on the surface into contact with the metal body, and repeatedly bringing the surface of the metal body into contact with the convex portions of the matrix. This prevents the progress of plating adhesion to the pressed part of the metal body, increases the thickness of the plating layer on parts of the metal body other than the pressed part, and creates an uneven pattern on the surface of the metal body due to variations in the thickness of the plating layer. A method for forming an uneven pattern by plating, characterized by forming an uneven pattern. ■ The matrix and the metal body are cylindrical and are arranged in contact with each other so as to freely rotate, and the matrix presses the metal body while rotating in opposite directions. A method for forming an uneven pattern. (2) The method for forming an uneven pattern by plating according to claim 1, wherein the matrix and the metal body are plate-shaped, and the matrix and the metal body are repeatedly brought into contact and separated from each other so that the matrix presses the metal body. ■ The matrix is cylindrical, the metal body is plate-shaped, and the matrix presses the metal body while rolling on the metal body.Claim 1
A method for forming an uneven pattern by plating as described in . ■ The pattern of protrusions and recesses formed by plating according to claim 1, wherein the matrix is plate-shaped and the metal body is cylindrical, and the matrix is in contact with the metal body and presses the metal body while reciprocating in the lateral direction. Formation method. (2) A method for forming an uneven pattern by plating according to claim 2 or 4, wherein a part of the mother mold is immersed in a plating bath. (2) The method for forming an uneven pattern by plating according to any one of claims 1 to 11J6, wherein the mother mold is coated with a liquid having the effect of inhibiting plating adhesion, such as silicone oil. ■ After forming a plating layer with a uniform thickness on the surface of the metal object,
8. A method for forming an uneven pattern by plating according to any one of claims 1 to 7, wherein a matrix is repeatedly pressed onto the surface of a metal body.