JPS59197884A - Plastic wrist watch case - Google Patents

Abstract

PURPOSE:To obtain a plastic metallic case to which a composite finish having a high quality sense is performed by performing the finish of two kinds or more, or a color tone and a plating combining them to the surface of a plastic case. CONSTITUTION:An ABS plating grade is used as a base material, and a good having a case shape is obtained by an injection molding machine. In case of this molding, by considering that a molding failure occurs and adhesive strength is deteriorated if metallizing is executed, an internal stress is suppressed small in order to obtain the molding of high quality. Subsequently, after a pre-treatment including an etching is executed, a chemical nickel plating and also a copper plating are executed. Thereafter, the good is partially crape-patterned by executing a honing from on the metallic masked good. Subsequently, the masking is detached, and washing and activation of the surface are executed, and thereafter, a nickel plating and a finish chrome plating are performed, and a plastic metallic case of a composite finish having partially a crape pattern on the specular surface is completed. In this way, the good having various finishes and replacing a conventional metallic case is manufactured to enable to reduce a cost and to rationalize manufacture.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the surface finish of a plastic metallized wristwatch side C (hereinafter referred to as a metal case).

The majority of conventional 1-lameta cases are made of bell-faced surfaces on all surfaces, and there are a small number of cases in which all surfaces are made of satin-finished plating. Most of these have smooth surfaces at the molded product stage, and even if they have fine patterns such as those used on the surface of the arm 1j1, thick plating (due to quality issues) is required.
]5 to 30μ], the original pattern could not be revealed. On the other hand, we use a one-racking method for production stability, and we do not change the finish or color tone partially, and there are no bra metal cases that have a composite finish or a combination of colors and seven straws. Met.

The present invention is intended to eliminate the above-mentioned drawbacks and to provide a frame case with a complex finish and a high quality texture never seen before.

Hereinafter, description will be made based on embodiments that are not inventive.

The material used here is ABS plating grade. Therefore, a method using a combination of chemical plating and electroplating is used.

Example 1 A case-shaped molded product is obtained using an injection molding machine using ABS plating grade material. In addition to molding, we took into consideration that metallizing would result in noticeable molding defects (sink marks, weld marks, etc.) and poor adhesion, so we focused on high-quality molding and keeping internal stress to a minimum (100K11A1 or less). Next is the plating process, which involves pretreatment including etching, followed by chemical nickel plating and copper metal trenches.

After that, the entire metal mask was removed and honed to give it a satin finish.

Then, after removing the masking, cleaning, and activating the surface, we applied nickel plating and finishing chrome plating, and created a composite finish bracket with a mirror surface partially covered with matte metal.

Example 2 The DZ type product is the same as in Example 1.

Next, in the plating process, pretreatment including etching is performed, and after fc, chemical nickel plating, copper plating, and nickel plating 1 are performed.

After that, resist is applied partially, and the areas without resist are plated with satin nickel.

Then, after peeling off the resist, a final chrome plating was applied after washing and surface activation at ℃, creating a plastic metal case with a composite finish that had a mirror surface partially covered with matte metal.

Example 3 As in Example 2, nickel plating was performed. After that, resist is applied partially and chrome plating is applied.

Then, after peeling off the resist, we washed it, activated the surface, and then applied gold plating to create a composite finished Brameta case with a white and gold finish.

As described above, according to the present invention, it is possible to create a 2" frame metal case with an unprecedented high quality composite finish. Furthermore, various plating grade resins can be used as the material. The same is true for conductive plastics.Also, it can be easily inferred that by combining all of the examples, a bracket case with different finishes and colors can be created.Also, instead of using the one-racking method, the racks are removed once in the middle. This can be dealt with by thorough cleaning and activation.

Further, according to the present invention, a frame metal case with a wide variety of finishes can be produced, which has all the finishes comparable to conventional metal cases, and can replace metal cases, leading to cost reduction. At the same time, it is also advantageous in streamlining production.

that's all Applicant: Daini Seikosha Co., Ltd. Agent: Patent Attorney Mogami

Claims (1)

[Claims] The plastic watch side is characterized in that the surface of the plastic watch is plated with two or more finishes, two or more color tones, and a combination of them.