JPS59200785A - Nickel electroforming bath of electroforming die for dial - Google Patents

Abstract

PURPOSE:To produce an electroforming die for patterning by striking having excellent durability and transfer rate in the stage of producing said die for a striken dial by providing a conductive layer on the surface of a pattern formed of a curable resin, and forming an Ni plating layer on the surface thereof by a plating bath consisting of prescribed compsn. CONSTITUTION:Production of an electroforming die to be used in forming characters and patterns by striking on the surface of the dial, etc. of a timepiece is accomplished by placing a glass ring 2 on a blank material of paper, leather, etc. on which the characters and patterns to be transferred are formed, and sealing the contact parts between both by clay 3. A curable resin 4 is then cast into the ring 2 to reproduce the characters and patterns on the resin surface. A conductive layer 6 is formed by electrodeposition, etc. on the resin surface to form an electroforming pattern 5. Said pattern is electroplated in an Ni plating bath contg. sodium benzaldehyde 2,4-disulfonic acid at 5-50g/l rate, by which the electroforming die having excellent preciseness and corrosion resistant of the characters and patterns is produced.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a stamped pattern mold for patterning exterior parts of a timepiece such as a dial including a parting plate.

Conventionally, the dial pattern Ct) processing methods include applying the pattern to the dial using a metal brush, spraying fine abrasive grains to create a satin finish, and cutting with a cutting tool and rotating a small grindstone. Some had dental patterns on them. However, it has the disadvantages of restrictions on pattern and type, requiring a lot of time for mass production, and limiting quantity for mass production. In addition, the stamped pattern dial plate is made by processing patterns on carbon steel such as alloy tool steel and heat treating it to hardness H.
It is manufactured by press-molding gold treated to about 4700 on a brass or nickel silver character blank 2+ and transferring the pattern.fc
The 10,000-loe method for creating patterns includes freon patterns using freon bite, cut patterns using a mailer cut machine, etc., spin patterns,
There are dental patterns made with a whetstone, etched patterns made by etching, etc.However, since the patterns are made on steel, delicate patterns cannot be made.In addition, patterns on natural leather, trees, Japanese paper, etc. can also be made using molds. It was not possible to make a sword in the original style.In order to fully express the idea, electroforming has made it possible to process deep blue patterns and patterns from the natural world into stamped patterns without letters. With this electroforming pattern ID, a precipitated metal with a U degree of about 500 to 600 Hv can be obtained by nick lumen casting, but the pattern pattern using conventional heat-treated copper material has a HV of about 700. When press molding is performed using a hammered pattern mold, there is a drawback that the pattern wears out and the life is short. (Mechanical properties such as tensile strength are also
Because it is inferior to the pattern of ``Shikiwa'', the blade mouth is ``&9'' Sugifusa]
Even if it were possible, it would not be possible to apply a load to transfer a 100φ pattern. Currently, applying a load of about 9/112 to 100 will cause damage or depression of the plaque, so we press and mold with a low load, but the pattern transfer rate is 60 to 70.
71" points of electroforming pattern pattern that only has φ j4i+
, i haven't done it.

The uninvention is to improve the above drawbacks and create a high-quality dial with a delicate stamping pattern. A complete method for manufacturing an electroforming pattern mold is provided.

Hereinafter, the manufacturing method according to the invention will be explained based on the drawings, including examples.

Figures 1 and 2 show the process of producing an electroforming mother mold. Figure 1 shows the fully developed pattern of a nonconductor, such as paper, leather, etc.
A glass ring 2 is placed on a material 1 such as gold leaf fabric, and the gap between the glass ring 2 and the material 1 is sealed with clay 3. The reason for the viscosity of 3 is to prevent the curable resin 4 from flowing out from the gap when the 1-ht curable resin 4 is poured. Next, a curable resin 4 is poured into the glass ring 2 to form a pattern.

Next, as shown in FIG. 2, a conductive layer 6 is formed by vapor deposition or the like in order to impart conductivity to the resin surface with all nine patterns, and five electroforming master molds are manufactured. Next, FIG. 3 shows the process of manufacturing the electroforming die pattern 8, and the composition of the hard electroforming mold bath and the electroforming conditions are as shown below.

Hard nickel electroforming mold bath composition, electron conditions, and physical properties of precipitates Hard nickel electroforming mold bath composition 1 + Nickel sulfurinate 3009/l-~600.9/A 2° Nickel chloride 5g/l~509/L3゜Boric acid 30ji/L ~ 80ji/14゜Benzaldehyde disulfonic acid disodium
1011/L~509/ electroforming condition 1, temperature 50℃~60℃ 2, A/dm2 2A/dm" -6A/d, rn"
3, PH4.0~4.5 Physical properties of precipitate 1 - (!';!5i Hv
7 0 0 ~ 7 5 02 degrees and rupture power 10,
97 breath 2~20 Kgl so-called 23, pile tension 170!
! /72~220Kg/secondarily 7) i', tZ c
After post-processing the electroforming pattern stamping pattern to the v thickness and forming the hZ shape into the required shape, use the stamping tool to press 8L, press the dial material and stamp it. Obtain a patterned dial.

The above 11th embodiment (a 7L die-cut pattern type made from carbon steel that has been used conventionally, the number is on the same level as
With Natsun, it is possible to manufacture molds more stably than before without having to wait for the repair.

Next, the relationship between the amount of the additive (disodium benzaldehyde 24 disulfonate) and hardness is shown in Figure 5.According to the experimental data, adding 97L or more of the additive has little effect on hardness. On the contrary, internal stress increases, causing warpage in the deposited metal and deterioration of mechanical properties, resulting in poor conditions.

As shown above, the stamping pattern mold for the dial plate of the N1 electric bath according to the present invention can be used to create patterns on natural leather, 4'-j wood, Japanese paper, etc., as well as conventional patterns. Not only can it be made into a mold, but it can also be formed on the dial surface while retaining the natural texture, making it possible to mass-produce dials with delicate and soft patterns at an extremely low cost. Land use has a great effect.

It is of course possible to use the mold produced by the manufacturing method of the present invention for decorative parts for 111 scales, such as parting boards, in addition to text copying boards.

[Brief explanation of the drawing]

Figures 1 to 3 are process diagrams explaining the method for manufacturing electroformed pattern molds according to the present invention, Figure 4 is a process diagram of press molding using the mold of the present invention, and Figure 5 is a diagram showing additives. FIG. 2 is an explanatory diagram showing the amount and hardness. 1. Natural leaf material 2. Glass ring 3. Clay 4. Curable resin 5. Electroforming master mold 6. 4 electric layer 7,. Precipitated 7+8+H'! ′、、、J pattern presentation 9°. Punching tool 10°. Dial plate raw material 11. More than a punch, Kyoujin Daini Seikosha Co., Ltd. Agent Patent Attorney Mogami Tsutomu 1 Figure 2 / Otsu Figure 3

Claims (1)

[Claims] Characteristics of the nickel electroforming bath for electroforming pattern stamping plate, 5g to 50g of benzaldehyde disulfonate disodium immersion agent are added to the nickel electroforming bath. Nickel electroforming bath for plate electroforming molds.