JPS5825533B2 - Decorative chain electroforming processing equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention utilizes a suitable electroforming method for using a normal decorative side chain as a material, thickening it by electroforming, and making it thicker and densely connecting each sterling silver. This invention relates to a casting machine.

The purpose of the present invention is to uniformly and thickly thicken the chain silver of long chains or chains connected in long lengths by electroforming, and to be able to freely change the degree of fleshing, and to efficiently manufacture a wide variety of chains even in small quantities. Furthermore, as a pre-processing process for decorative side chains by compression deformation, etc., uniform electroforming is performed to increase the density of the material chains, creating a more innovative style. The purpose is to provide decorative side chains.

Generally, it is desirable for decorative side chains to be connected so that each individual chain is bent freely as a unit, and although there may be a limit to its directionality and degree of freedom depending on the structure of the chain, at least it can be used in necklaces, etc. It must be flexible enough to bend or move smoothly without causing any problems.

To this end, the shorter the interval between connections compared to the size of the silver chain, that is, the shorter the interval between bending fulcrums, or in other words, the more connection fulcrums there are within a unit length, the more flexible the chain becomes.

Although the relatively short spacing between the chains greatly contributes to the flexibility of the chain, mechanically narrowing the spacing between the chains has the following major limitations.

Normally, for example, in the case of a cable chain made of simple oval-shaped sterling silver, the chain is made by winding the cut wire around a core rod, or by cutting the wire wrapped in a spiral shape and connecting it. In the case of Figure 1a, since there is a connecting process in the case, it is theoretically possible to reduce the connection interval l to an inner diameter large enough to accommodate two wires (2d when the wire diameter is d). Yes, but in reality l=2.5d
It is technically quite difficult to make each piece of pure silver have an inner diameter of 1=2.5d, and it is usually about 1=3d.

Based on this knowledge, the inventors of the present invention investigated a method of making the interconnection intervals of pure silver closer together, and as a result, they discovered that the scales could be achieved by adding flesh to pure silver by electroforming, which would meet the intended purpose.

Furthermore, as a result of research and experiments on the method of thickening sterling silver by electroforming, the present inventor found that when overlaying by electroforming, the bonding strength of sterling silver increases significantly as it thickens, and each sterling silver It has been found that the scales are particularly advantageous in the case of performing compression deformation processing in the subsequent process, since the connecting intervals of the scales are closely packed to provide a decorative chain with excellent flexibility.

Furthermore, if electroforming is carried out so that the weight of the decorative chain before electroforming becomes at least twice as large after electroforming, the chain that has not been brazed at the abutting portions of each pure silver may be used as a material. Even if the wire is brazed, it will have the same strength as one that has been brazed in advance, and if the brazing process is omitted and the material is made of scales and a chain that has been brazed, it will be about twice as strong. I also discovered that.

To illustrate this now in Figure 2a, the distance 11 between the interconnection points of the first chain link 1 is typically about 3d1 (dl is the initial diameter of the wire forming the first chain link).
As mentioned above, it cannot be set to 2.5d1 by mechanical methods.

In other words, it is impossible to obtain a chain with a dense structure in which 11 is smaller than 2.5d1, whereas it is impossible to obtain a chain with a dense structure in which 11 is smaller than 2.5d1. After enlargement, 12 (the new distance between the interconnection points) becomes 2d2 or smaller (d2 is the average diameter of the new wire), which is extremely small compared to the thickness of the wire, which cannot be manufactured by mechanical methods. This will give a chain with a dense structure.

This is because the wire diameter of enlarged links is on average;
This is because the inner diameter of the link becomes even shorter due to the electroformed deposits, whereas qd1 becomes 2.236d1.

Also, when the chains are pressed or swaged to apply lateral pressure, the distance between the interconnecting points of the chains tends to be lengthened by deformation of the links and interlocking of the links in the longitudinal direction.

With the press or swedge mentioned above, even after flexible processing, not only does the degree of freedom of each chain link decrease,
The flexibility of the chain obtained is also reduced by reducing the number of links per unit length.

However, the distance between the interconnection points of the chain links is shortened to the minimum compared to the thickness thereof, and the interconnection space in the chain links enlarges from a to b in Fig. 2, so that it is sufficiently compacted. If the length of the chain is increased, the number of links per unit length will be larger compared to its thickness, and it will also not stretch in the longitudinal direction, which will have an advantageous effect on the flexibility of the resulting chain. .

The advantage of electroforming in the present invention is that the overlay is relatively thick on the outer parts and relatively thin where it overlaps and is shaded, such as in the joints, yet it can be thickened to the required dimensions. It is easy to achieve this, and its accuracy can be strictly controlled by controlling the electroforming current, time, etc.

In addition, electroforming while moving the chain has the effect of overlaying the connecting fulcrums, which are relatively difficult to electrodeposit, and reducing the distance between the fulcrums.
Electrodeposition to fill the spaces of silver has the effect of reducing the space extending in the connection direction and the degree of deformation, and is also extremely advantageous when applying compression deformation or other processing to the silver. .

As mentioned above, when electroforming is used to add thickness according to the present invention, there is a tendency to greatly increase the strength, but this tendency
This phenomenon is noticeable during the process of increasing the weight to double its weight, and beyond that point, the increasing tendency slows down and approaches saturation.

The present invention takes advantage of this phenomenon to increase the size of the joint, which has the effect of increasing the strength of the butt joint with or without brazing, and also has the advantage that brazing can be omitted.

Furthermore, according to the present invention, strengthening of the joints described above, combined with making the connection intervals closer, has the effect of reducing the occurrence of breakage and defective products during subsequent processing such as compression deformation processing. .

In this way, the electroforming process according to the present invention is not only effective as a strength supplement for the compression deformation process that is often performed subsequently, but also allows for the production of chains of greater variety and higher decorative value by itself. It has a certain effect.

In other words, there is naturally a limit to the variety of chains that can be produced by an automatic chain-making machine, but according to the present invention, new and interesting chains can be created by freely increasing the thickness of chains using inexpensive chains that can be produced by automatic machines. It has the advantage of being able to be manufactured in a wide variety of ways.

The apparatus for performing electroforming and fleshing of decorative chains of the present invention is based on such new knowledge, and was further completed based on the following knowledge.

Generally, long chains are plated as follows: (1) Plating as a bundle.

(2) Frame and plate. (3) Continuously pass through the tank.

It is roughly divided into three methods.

Methods (1) and (2) are effective when the plating only needs to be very thin, such as ordinary decorative plating, but when electroforming is performed over a long period of time to uniformly thicken the chain. It is unsuitable because it tends to cause non-uniform areas.

Method (3) is similar to the plating of wire rods, in which the wire is passed through a plating tank continuously for plating, but this method is effective for producing large quantities of the same type of wire rods. However, it cannot be said to be suitable for products such as decorative side chains, which require relatively large variety and small quantity production.

The device of the present invention was developed in response to this situation, and basically consists of a rotating cathode rod that is mounted above the electroforming liquid surface in an electroforming tank containing an anode in a multi-loop shape. A long chain or a chain connected to a long chain (hereinafter simply referred to as a long chain) is hung vertically and immersed in an electroforming solution, and the desired electroforming thickness is achieved by continuously feeding this loop. At that time, a non-conductive weight bar is hung horizontally over the bottom end of the loop to prevent the length of the long chain from becoming uneven during the rotation of the cathode bar and causing it to fall off the cathode bar. The desired purpose is achieved by providing grooves, protrusions, etc. as spacers for maintaining the loops at a constant distance along the length of the cathode rod and weight rod.

According to the device of the present invention, grooves or protrusions (flanges) are provided as spacers in both the upper and lower cathode bars and the weight bar, and the chain is hung in the groove or between the protrusions, so that the loop interval is constant and the cathode bar rotates. Since the position of the medium chain is constantly moving, uniform fleshing is achieved.

It is also possible to feed a long chain loop endlessly in a certain direction, or to feed it continuously from one coil and wind it up on the other coil, or to feed it continuously at a certain pitch or every time. Since electroforming is performed in reverse, the electroforming time can be accurately uniformized, including the upper end of the loop that is exposed above the liquid surface.Also, since the chain is kept taut using a weight bar, there is no need to worry about the chain slipping off from the cathode rod, and the current Evenly, the bending given to the chain when it passes through the cathode rod and weight rod gives flexibility to the joints of the chain, preventing it from becoming rigid, and also has the effect of preventing the chain from becoming curly.

Furthermore, even if the chains become thicker and shrink in the length direction, the weight bar makes them uniform, and the chains can always be aligned and maintained in the normal direction without worrying about the chains bending.

In addition, according to the present invention, there is no need for a means for hanging long chains, so there is no needless electrodeposition and 100% effective utilization can be achieved.
Furthermore, it is advantageous to connect long chains endlessly to enable electrodeposition over the entire length.

Furthermore, in carrying out the present invention, it is advantageous to use a square rod as the rotating cathode rod because it is possible to avoid slipping even when the chain becomes thick due to electroforming, and it is also advantageous to use a coil spring for the length of the long silver. If you insert an elastic body such as a rubber band or make the distance between the rotating cathode rod and the weight rod elastically expandable, the distance between the contacts of the silver chain will decrease as electroforming progresses. This is effective because the tension on the long chain can be kept constant even when the chain is in use.

Embodiment In FIGS. 3 and 4, a removable rotating cathode rod (30 square cross section) 13 is mounted on the center of an electroforming tank 12 which is equipped with anodes 11 made of copper plates encased in titanium on both sides. This cathode rod 13 is provided with flanges 14 made of vinyl chloride at regular intervals.

Reference numeral 15 denotes a non-conductive weight rod of 201rL1rLφ made of a vinyl chloride pipe with an iron core pressed inward, to which also vinyl chloride tops 14' are attached at regular intervals.

A guide pipe 16 made of vinyl chloride is installed in the bearings at both ends of this weight bar 15, and a guide pipe 17 attached to the electroforming tank 12 is inserted and fitted here via an internal spring 18. Weight bar 15 against spring 18
Try to lift it up a little.

The cathode rod 13 is rotated by a motor 22 via a joint 19 outside the tank 12, a sprocket wheel 20, and a chain 21.

23 indicates the liquid level of the electroforming bath.

24 indicates a long chain to be electroformed and a pair of cathode rods 13;
and the weight rod 15, from one end to the other end in a left-handed loop shape, and at the other end, the hook is transferred to the other pair of cathode rods 13□ and weight rod 15□. The first pair of cathode rods 13 and weight rods 15. The hangings are hung endlessly by being moved.

As for commonly used electroforming baths, for example, a tora casting bath containing copper sulfate as the main component is effective when the purpose is simply to increase the size, and a cyanide bath (for example, a cyanide bath) is effective when the purpose is to give a rough surface. Cuprous oxide 80 g/l, free cyanide 7-109/110
Electroforming at 60° C. for 1 hour with a bath composition of 10 g/l of Tsusiel salt is effective, and the electroforming time is usually about 1 to 3 hours.

However, the conditions of the electroforming bath are not particularly restricted, and when the long chain is made of brass, red copper, etc., a copper sulfate bath (C
uSO4+ H2804) can be used to obtain a high quality electrodeposited layer with as good spreadability as possible.

No bath additives are required in this case, for example Cu5O, 29
09/l, H280490F/l bath at a temperature of 30°C and a current density of 4A/di to achieve a smooth wall thickness of 1.2
Obtained at a efficiency of ~1.3 g/amp/hour.

Pretreatment of the long chains includes degreasing and activation with acids, etc., by conventional methods, and post-processes include washing, neutralization, washing, drying, etc.

[Brief explanation of drawings]

Figures 1 a, b, c, and d are front views for explaining the simplest form of decorative silver material, usually called a cable chain, and the state of enlargement due to electroforming at each magnification. and a side view, and FIGS. 2a and 2b are partial views of the strand before and after enlargement, which are detailed explanatory views of the present invention. FIG. 3 is an explanatory view from the front of an electroforming and fleshing processing apparatus showing an embodiment of the present invention, and FIG. 4 is an explanatory view from the side of the same. 1... Pure silver, 11... Anode, 12...
...Electroforming tank, 13...Rotating cathode, 14,1
4'...Brim, 15...Weight bar, 24
...Long chain.

Claims (1)

[Claims] 1. An electroforming tank containing an anode, a rotating cathode rod mounted above the electroforming liquid surface of the electroforming tank, and a rotating cathode rod held parallel to the rotating cathode rod in the electroforming liquid. and a non-conductive weight rod, configured so that long or interconnected decorative silver materials are hung around the rotating cathode rod and the weight rod in multiple loops, and These rotating cathode rods and weight rods are provided with grooves, protrusions, or spacers for separating each loop of the decorative side chains, so that electroforming can be applied to the decorative side chains while rotating the rotating cathode rods. An electroforming and fleshing processing device for decorative side chains, which is characterized by: 2. The decorative side chain electroforming and fleshing processing apparatus according to claim 1, wherein the rotating cathode rod has a angular cross-sectional shape. 3. Claim 1 states that the decorative side chains are connected in a long length through an elastic body, and the reduction in the distance between the contact points of the decorative side chains as electroforming progresses is eliminated by the elongation of the elastic body. Equipment for electroforming and filling decorative side chains. 4. The decorative side according to claim 1, wherein the distance between the rotating cathode rod and the weight rod can be elastically reduced in accordance with the reduction in the distance between the contacts of the decorative side chain as electroforming progresses. Chain electroforming processing equipment.