JP2577866B2 - Manufacturing method of local plating target and local plating target - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a decorative specimen in which plating is locally applied to various synthetic resin molded articles, and a locally plated specimen produced by the method.

[0002]

2. Description of the Related Art A conventional decorative specimen (hereinafter simply referred to as a "local plating specimen") which has been subjected to a plating treatment on such a local area will be described with reference to the drawings. FIG. 6 is a front view of a conventional local plating target, and FIG. 7 is a view for explaining the outline of the manufacturing process. In the figure, A is a locally plated specimen of a synthetic resin molded product, 1 is a plated character portion, 1 ′ is a not-yet-plated character portion, 1 ″ is masking, and 2 is a base to be painted. Plane.

As shown in FIG. 7 (a), a locally plated specimen A of a conventional synthetic resin molded product is, as shown in FIG. A plating process is applied uniformly including the character portion 1 'and the base surface (chrome plating is generally used for final finishing), and then characters or patterns are displayed as shown in FIG. 7 (b). It is created by a method of painting and finishing the base surface 2 other than the part. The paint finishing process is performed after the character portion 1 is masked 1 "and the base surface 2 that has been subjected to plating or the like is cleaned thoroughly.

[0004]

However, since the locally plated specimen A of the synthetic resin molded product is coated on the chrome plated surface, the adhesion strength of the paint to the locally plated specimen A (adhesion) ) Is bad. In particular, when the surface of the local plating target A is wiped, or when the local plating target A is mounted on an automobile or the like, it rubs against the outside, for example, the local plating target A
If the brush of the high-speed car washer touches the surface, the paint on the base part 2 other than the plated character part 1 is peeled off and the appearance of the target body is impaired, causing a major quality control problem. ing.

[0005] In recent years, paints for coating the plating surface have been actively studied, and the technology has been greatly advanced to improve the adhesion of the coating to the plating surface and the surface strength (resistance to scratching). However, the development of paints with no quality problems has not yet been achieved.

It is also proposed to use electroplating (electroplating) to perform plating only on portions that require plating, and to minimize plating on other portions.
Has been realized. An example of this method will be described next with reference to the drawings. FIG. 8 is a diagram for explaining a method of performing electroplating by providing a conductive line on the surface of the decorative specimen,
9A is a front view, FIG. 9B is a right side view, FIG. 9 is a front view of a finished local plating target, and FIG. 10 is a flow chart for explaining a work procedure of a conventional plating / painting process line. In the figure,
B is a locally plated specimen, 3 is a character portion, 4 is a conductive line, 5
Is an electrode boss for plating, and 6 is a base surface coated with paint.

[0007] In the local plating specimen B in this method,
In a general procedure, as shown in FIG. 10, in a later step of electrolytic plating and mask coating, a conductive line 4 is provided from the plating electrode boss 5 to the character portion 3 by performing mask coating or mask printing for electrolytic plating. Electroplating is performed by the conductive lines 4, and thereafter, the base surface 6 is processed by coating a required surface in a mask coating process.

However, in this method, the plating surface as the conductive line 4 remains on the base surface 6 except for the character portion 3 which is a surface requiring plating, though slightly, compared with the conventional method. Even if the upper surface 6 is subjected to the coating treatment, the coating at that portion is also easily peeled off, and it cannot be said that the problem has been completely solved. Here, the present invention has been made in view of the above problems, and provides a method of producing a local plating target and a local plating target that are less likely to cause paint peeling of a painted surface, on the surface of various local plating targets subjected to plating finishing treatment. Is what you do.

[0009]

The object of the present invention can be attained by adopting the following novel characteristic construction methods and means of the present invention. That is, the first feature of the method of the present invention is that, in producing a locally plated specimen in which a synthetic resin molded product is partially subjected to a plating finishing process, the surface of the synthetic resin molded product is etched. After that, electroless plating mainly made of chemical nickel is applied to give electrical conductivity, masks are applied to parts requiring electrolytic plating, paint is applied, and the mask is removed and paint is not applied It is in the method of producing a local plating target for electroplating a part.

A second feature of the method of the present invention relates to the production of a locally plated specimen in which a synthetic resin molded article is partially subjected to a plating treatment, and the surface of the synthetic resin molded article is electrolyzed. For parts that do not require plating, apply paint to prevent etching and then perform etching, then apply electroless plating mainly using chemical nickel to the parts that have been subjected to the etching, to have electrical conductivity, It is in the method of manufacturing a local plating target for performing electrolytic plating.

According to a third feature of the method of the present invention, in the first or second feature of the method of the present invention, after the electrolytic plating is performed, a mask is applied to the electroplated portion, and the paint is already applied. It is in the method of producing a locally plated specimen that applies a finish paint to the part that has been painted.

A fourth feature of the method of the present invention resides in the production of a locally plated specimen in which a synthetic resin molded article is partially plated and finished. Attaching an electrode boss to the surface, and providing a fine hole for a conductive line penetrating from a portion adjacent to a desired portion of the front side fabric surface of the synthetic resin molded product to the back side thereof, and then forming the synthetic resin molded product After coating and coating the etching prevention coating layer on the front side fabric surface other than the desired portion and on the peripheral side surface, and subsequently, etching the desired portion of the front side fabric surface of the synthetic resin molded product, By applying electroless plating mainly using chemical nickel to give electrical conductivity, applying electricity to the boss for the electrode, and further covering the desired portion via the fine hole for the conductive line with an electrolytic plating layer, When you cut the boss from the root To, in preparation of local plating target body the conductive line for micropores Metomezai (joint agent) is filled with and finish closes the micropores.

A first feature of the article of the present invention is that an electroless plating layer mainly composed of chemical nickel is laminated on the surface of a molded article made of synthetic resin, and a desired portion on the electroless plating layer is electroplated. The layers are laminated, and the portions other than the desired portions on the electroless plating layer are on the locally plated specimen on which the coating layer is laminated.

A second feature of the article of the present invention is that the surface of a desired portion of the molded article made of synthetic resin is coated with a coating layer or a printed film, and the surface other than the desired portion is mainly made of chemical nickel. An electroless plating layer is laminated, and the electroplating layer is formed on the local plating target on which the electrolytic plating layer is further laminated.

[0015]

Since the present invention employs the above-described method and means, the portions requiring no plating and only coating are required to be applied on the electroless plating layer or directly on the synthetic resin without electrolytic plating. Since it is applied to the surface of the fabric of the molded product, the adhesiveness to the coating film is good and the product is hard to peel off, so that a high quality product can be manufactured. Therefore, even if the brush rubs against the outside, particularly when the brush is driven at a high speed in a high-speed car washer of an automobile, the paint on the painted portion does not peel off.

[0016]

Embodiment (Method Example 1) An embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a front view of a locally plated specimen manufactured by the present method example, and FIG. 2 is a work flow chart of a plating / coating process line for explaining the procedure of the present method example. In the figure, C is a local plating target, 7 is a character portion to be plated, and 8 is a base surface to be painted.

As shown in the flowchart of FIG. 2, the surface of the locally plated specimen C is made conductive after the chemical nickel treatment step, which is the final treatment of the pre-etching / electroless plating step. Next, as shown in the processing step group surrounded by the double block, the local plating specimen C is removed from the chemical nickel plating tank and the plating jig (electrode jig), taken out, and washed with water (washing-pure water shower washing). The plating surface of the target character portion 7 which needs to be plated by drying is masked, and only the base surface 8 is coated. Next, remove the mask, attach the target to the plating / coating process line for electrolytic plating (electroplating) treatment, and throw it in.
After the pickling process, the process returns to the conventional process, and finally, only the target character portion 7 is subjected to a chrome immersion plating finishing process. The mask coating process in the latter stage of the electroplating / mask coating may be omitted when it is not necessary to repaint the surface with a clean coated surface.

According to this method example, the surface painted on the electroless plated surface (the surface other than the character etc. = base surface 8) is not plated, and the surface of the character portion 7 which needs to be plated in design is applied. Only by plating, a stable local plating target C can be formed.

In addition, since a coating process is not performed after the electroplating process (electroplating process) is performed as in the prior art, the paint is not peeled off from the painted portion, and a very high quality product is manufactured. It becomes possible.

(Method Example 2) A second method example of the present invention will be described with reference to the drawings. FIG.
It is a work flow chart of a plating and painting process line for explaining a procedure of the present method example. This method example is used when a plating (chrome plating or the like) finish treatment is finally applied to a resin-made specimen. First, in a pre-etching / electroless plating process in a normal plating / coating process line, an etching prevention coating process is performed so that an etching process is not performed on a surface (site) that does not require electrolytic plating finishing. In the etching prevention coating process, a coating process or a printing process is performed using a special paint. After that, the target is put into the usual plating / painting process line again, and the target that has been subjected to the plating process only on the surface (site) requiring the plating process can be manufactured. Incidentally, the mask coating treatment step in the latter step of the electrolytic plating / mask coating may be omitted as in Method Example 1.

(Article Example 1) A target design creation method for creating a locally plated target by employing the two methods of the first method example or the second method example includes:
There are two cases. In other words, there are two cases: (1) when a coating process is desired for a character portion and a plating process is desired for a base portion; and (2) when a plating process is desired for a character portion and a coating process is desired for a base portion. It is described below.

First, a first example of an article will be described with reference to the drawings. FIG. 4A is a front view of an example of the article, and FIG.
FIG. 4A is an enlarged sectional view taken along line IVb-IVb. In the figure, D is a locally plated specimen of the present article example, 9 is a character portion for which a painting process is desired in a later step, and 10 is a base portion for which a plating process by electrolytic plating is desired in a later step. In this article example, the undercoating layer α and the overcoating layer β are double-coated on the character portion 9 on the front side fabric surface of the synthetic resin molded product Da, and the base portion 10 is coated from below. The etching layer γ, the electroless plating layer δ, and the electrolytic plating layer ε are sequentially plated and covered.

The present article examples exhibit such specific embodiments. That is, the character portion 9 is a coating process, the base portion 10
Is an example of an article in the case where a plating process is desired. Here, a description will be given of a preparation process in a case where the second example of the method is adopted.

The character portion 9 not to be etched is coated with a special paint, and the base portion 10 to be etched is not subjected to any processing. By the processing just before the etching processing step, the etching processing as the surface processing is performed only on the base portion 10 requiring the plating processing, and an etching processing layer is formed. In the subsequent processing step, plating is performed, the electroless plating layer and the electrolytic plating layer are laminated and coated, and the character portion 9 that has been specially coated is not etched. Is not applied, so coating with resin paint works very well.

The coating with the special paint may be peeled off after the etching process is completed. Also,
As long as the compatibility with the paint in the subsequent coating treatment step with the usual paint is good, the process may be proceeded without any change.

(Example 2 of goods) A second example of goods will be described with reference to the drawings. FIG. 5A is a front view of the present article example, and FIG. 5B is Vb-Vb in FIG. 5A.
FIG. In the figure, E is a locally plated specimen of the present article example, 11 is a character portion to be plated in a later step, 12 is a base portion to be painted in a later step, 13 is an electrode boss for plating, and 14 is a letter portion 11 This is a fine hole for the upward conical conductive line penetrating from the top hole edge 14a (edge of the front end hole) in contact with the bottom hole edge 14b on the back side of the local plating target E. In addition,
In FIG. 5, which is an explanatory drawing of the present article example, the conductive line micro holes 14 are exaggerated for easy understanding.

The present article examples exhibit such specific embodiments. That is, a plating process is desired for the character portion 11,
The base part 12 is an example of an article in the case where a coating process with a normal paint is desired. As in the first example of the article, a description will be given of a preparation process in the case of adopting the second method example. FIG.
As in the case of the first article, the localized plating specimen E in the above does not need to be coated with a special coating at the stage immediately before etching on the character portion 11 for which plating is desired, but is desired to be coated with a normal coating. The base surface 12 and the four peripheral side surfaces 12 'are subjected to a coating process of a coating layer α' with a special paint.

Then, after coating with the special paint, the coating of the etching layer γ 'is etched, and thereafter, the local plating specimen E is put into the plating / coating process line, and the electroless plating layers δ', The electrolytic plating layer ε ′ is coated in multiple layers, and the base surface 12 is coated with a finish coat layer β ′.

What is important here is that in the present article example, there is no need to provide the conductive line 4 as shown in FIG. 8 of the conventional example. That is, the conductive line L is plated from the inner side surface of the conductive line minute hole 14 of the locally plated specimen E, and naturally becomes the conductive line L to the character portion 11 whose surface is desired to be plated. This is because it becomes possible. Further, the coating layer β 'is double coated on the surface of the coating layer α'. The coating of the coating layer β 'in the subsequent step of the electrolytic plating / mask coating may be omitted.

The minute holes 14 for the conductive lines are formed on the surface to be plated by increasing or decreasing the number of holes as the conductive lines L or by changing the hole diameters according to the size of the character portion 11 for which plating is desired. Can control the finished state. Also, the shape of the conductive line micro-holes 14 is desirably a conical hole having a relatively small diameter near the surface where plating is desired and a relatively large diameter on the back surface.

The conductive-line fine holes 14 serving as the conductive-line holes are small holes after all the steps in the plating / painting process line are completed, so they are filled (joints).
By spraying the agent Ω, the holes can be easily closed and sealed, so that the appearance after completion of the product is not impaired.

[0032]

As described above, according to the first method of the present invention, after completing the chemical nickel treatment step of the electroless plating in the first step of the etching and the electroless plating, the local plating specimen is plated and removed. After temporarily removing from the painting process line, painting is performed on a portion other than the portion where plating is desired, and then a chrome plating process is performed in the final stage of electrode plating and mask painting. For this reason, since the coating does not occur on the electrolytic plating layer surface, the adhesion strength of the coating is strong, and the problem of peeling of the coating by an automobile washer is eliminated.

Further, it is possible to use the conventional paint for coating on the chromium plating surface as it is, and if a special paint for coating on the electroless plating layer surface is used, more stable quality can be maintained. Can be realized.

Further, according to the second method of the present invention, in the etching process indispensable for the first stage of the etching / electroless plating, the etching process is not applied to a portion which needs to be coated with ordinary paint in a later process. Coating with special paints where possible, thereby avoiding plating where necessary. Therefore, there is almost no problem in terms of coating adhesion strength, and durability and quality can be improved.

In the case of the locally plated specimen according to the first article example of the present invention, plating is not performed on unnecessary portions. It does not need to provide a conductive line indispensable for the electroplating in the technique described above, and exhibits excellent utility and economy.

[Brief description of the drawings]

FIG. 1 is a front view of a locally plated specimen manufactured according to a first method example of the present invention.

FIG. 2 is a work flow chart of a plating / painting process line for explaining the procedure.

FIG. 3 is a work flow chart of a plating / painting process line for explaining a procedure of a second method example of the present invention.

FIG. 4A is a front view showing a first example of an article of the present invention, and FIG. 4B is an enlarged sectional view taken along line IVb-IVb in FIG.

FIG. 5 (a) is a front view of a second article example of the present invention,
(B) is a sectional view taken along line Vb-Vb in (a).

FIG. 6 is a front view of a conventional local plating target.

FIGS. 7 (a) and 7 (b) are step-by-step schematic illustrations of the same manufacturing process.

FIG. 8 is a view for explaining a method of providing a conductive line on the surface of a local plating specimen and performing electrolytic plating.
(A) is a front view, (b) is a right side view.

FIG. 9 is a front view of a specimen finished by a method in which a conductive line is provided on the surface of a locally plated specimen to perform electrolytic plating.

FIG. 10 is a work flowchart of a conventional plating / painting process line.

[Explanation of symbols]

 A, B, C, D, E: local plating target α, β, α ', β': coating layer γ, γ ': etching layer δ, δ': electroless plating layer ε, ε ': electrolytic Plating layer Ω ... Sealing agent 1 ... Plated character portion 1 '... Unplated character portion 1 "... Masking 2,6,8,10,12 ... Base surface 3,7,9,11 ... Character part 4 ... Conducting line 5, 13 ... Plating electrode boss 14 ... Micro hole for conducting line 14a ... Top hole edge 14b ... Bottom hole edge

Claims (6)

(57) [Claims] In producing a local plating target in which a synthetic resin molded product is partially plated and finished, after etching the surface of the synthetic resin molded product,
Apply electroless plating with chemical nickel as the main component to make it conductive, apply a mask to parts that require electrolytic plating, apply paint, remove the mask, and apply electrolysis to parts where paint is not applied. A method for producing a locally plated specimen, wherein plating is performed. 2. In producing a locally plated specimen in which a synthetic resin molded product is partially subjected to a plating finish treatment, a portion of the surface of the synthetic resin molded product which does not require electrolytic plating is used. After applying a paint to prevent etching, perform the etching process, apply electroless plating mainly using chemical nickel to the etched portion, make it conductive, and perform electrolytic plating. A method of manufacturing a locally plated specimen that is a feature. 3. The method according to claim 1, wherein after the electrolytic plating is performed, a mask is applied to the electroplated portion, and a finish paint is applied to a portion where the paint is already applied. Manufacturing method for locally plated specimens. 4. In producing a local plating target in which a synthetic resin molded product is partially plated and finished, first, an electrode boss is attached to the back side surface of the synthetic resin molded product. Providing a fine hole for a conductive line penetrating from a portion adjacent to a desired portion of the front side fabric surface of the synthetic resin molded product to the back side thereof, and then excluding the desired portion on the front side fabric surface of the synthetic resin molded product. After that, a desired portion of the front side fabric surface of the synthetic resin molded product is subjected to an etching treatment, and then the desired portion is chemically electroless mainly composed of chemical nickel. Applying plating to make it electrically conductive, energizing the electrode boss to further cover the desired portion with the electrolytic plating layer through the conductive line minute hole, and breaking the electrode boss from the base , For the conductive line A method for producing a locally plated specimen, characterized in that a hole is filled with a filler (joining agent) to close and close the microhole. 5. An electroless plating layer mainly composed of chemical nickel is laminated on the surface of a synthetic resin molded product, and an electrolytic plating layer is laminated on a desired portion on the electroless plating layer. A localized plating target, wherein a coating layer is laminated except for a desired portion on the plating layer. 6. A coating film layer or a printed film is coated on a surface of a desired portion of the synthetic resin molded product, and an electroless plating layer mainly composed of chemical nickel is laminated on a surface other than the desired portion, Further, an electrolytic plating layer is laminated on the electroless plating layer, wherein the local plating target is provided.