JPS61149483A - Blank material for forming metallic product - Google Patents

Abstract

PURPOSE:To make possible the mass production of a metallic product having no burrs and flaws by coating a corrosion resistant film having the nature resistant to a metal etching liquid over the entire surface of a blank material for forming the metallic product and subjecting the blank material to press forming then shaping the material with the metal etching liquid. CONSTITUTION:The blank material for forming constituted by coating the corrosion resistant film having the nature resistant to the metal etching liquid over the entire surface of the blank metallic plate is press-formed to a product shape and the edges forming the shape are shaped by etching or electrolytic working with the metal etching liquid by which the metallic product is obtd. A plated surface, printed surface and two-layer worked surfaces consisting of an insulating surface for the lower layer and a printed wiring surface for the upper layer are formed on the surface of the above-mentioned metallic blank plate and thereafter the above-mentioned corrosion resistant film can be coated thereon via such surfaces. The water soluble or org. solvent soluble film consisting of a water soluble colloid, polycinnamic acid, cyclized rubber, quinone diazido magic ink, etc., is suitable for the above-mentioned corrosion resistant film and the aq. soln. of ferric chloride, acid such as nitric acid, hydrochloric acid, picric acid, or the mixed soln. thereof is suitable for the metal etching liquid.

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention relates to various metal products that are formed by processing equivalent to drilling or punching, such as electrical and electronic parts, and specifically integrated circuits. frame, connector, 7
Items such as gimbal springs for Otsubee disk porcelain heads, sensor springs, sensor step plates for stepping motors, shadow masks (color TV masks), steel belts for floppy disks,
This invention relates to molding materials for metal products, such as printed wiring boards, which must not have any cracks or scratches on their shape-forming edges or surfaces.

(Prior art) This type of metal product is manufactured by applying a corrosion-resistant film (resist, paste) by partially photoprinting a predetermined product shape using a photographic method on the front and/or back side of the molded material to be processed. After forming, it is molded using a photo-etching method (chemical milling method or chemical milling method) in which it is chemically etched and shaped, and the molding materials used are iron,
Most metals include copper, aluminum, nickel and their alloys, titanium, and zirconium. Metal products molded by the photoetching method using this molding material have the advantage of having no cracks on the edges of the shape and no scratches on the surface, but they also have the following problems.

In other words, the surface of the molding material remains exposed until it is partially photoprinted into a predetermined product shape, so even if the surface is plated, the plating itself is easily damaged, and the product surface may be damaged. It is difficult to eliminate all the scars caused by
Requires post-treatment such as plating to hide the scratches or prevent scratches from rusting; product thickness is limited to thin products; manufacturing time is long; human production is not possible; There are various problems due to the use of the above-mentioned molding materials, such as a high etching rate, a high unit price, and the fact that protrusions peculiar to etching, that is, etching pads, remain.

In addition, forming by electrochemical machining may be considered, but the surface of the forming material remains exposed until it is partially photoprinted into a predetermined product shape, so the surface may not be plated. However, the plating itself is still easily damaged, and it is difficult to eliminate all scratches on the surface of the product, and post-treatment such as plating is required to hide the scratches or prevent them from rusting. There are similar problems, such as the fact that the product is thicker, the manufacturing time becomes longer in proportion to the thickness of the product, and the processing accuracy is poorer.

In this way, the photoetching method using existing molding materials,
Although there are various problems with electrolytic processing, no molding material has been developed that solves the problems, so we have no choice but to rely on photoetching and electrolytic processing using unsatisfactory molding materials. This is the current situation.

(Problems to be Solved by the Invention) The problems to be solved by the present invention are to make it possible to form metal products by forming the product shape by pressing and forming the shape forming edge by etching or electrolytic processing, and to This is to protect the plate surface and the processed surfaces on the plate surface until the product shape is finished.

(Means for solving the problems) The means taken by the present invention to solve the problems regarding wages are as follows:
In metal products that are press-formed into a product shape and then shaped by etching the shape-forming edges with a metal corrosive solution or by electrolytic processing, metal corrosion may occur on the entire surface of the metal blank and/or on the processed surface of the same sheet. It is characterized by being coated with a corrosion-resistant film that is not attacked by liquids.

(Function) The entire plate surface of the metal blank and/or the processed surface on the same plate surface is coated with a corrosion-resistant film, which protects it from external pressure until the end of forming the product shape by press and from the pressure during the forming process, preventing scratches. By forming the product shape by pressing and forming the shape forming edge by etching or electrolytic processing,
It becomes possible to mass produce metal products without scratches or scratches.

(Example) An example of the present invention will be described in detail below based on the drawings.

FIG. 1 shows a partially enlarged view of the basic structure of the molding material A of the first invention, and the metal blank 1 in this molding material A is made of a material that is corroded by a metal corrosive liquid, specifically, iron. copper and its alloys (nickel steel, stainless steel, silicon steel, permalloy, etc.), copper and its alloys (brass, phosphor bronze).

beryllium copper, arms bronze, etc.), aluminum and its alloys (duralumin, etc.).

Made of nickel and its alloys (nickel silver, monel, copal, etc.), titanium, zirconium, and other metals, it is formed into a continuous strip of the desired width and thickness that allows metal products to be formed.

The entire plate surfaces la and lb of the metal blank 1 are coated with a corrosion-resistant l112 that is not affected by metal corrosive liquid, and the root surfaces 1a,
This prevents Ib from being damaged during product shape forming using a press.

Corrosion resistance II! I2 has a property that it is not attacked by the metal corrosive liquid during etching or electrolytic processing after forming the product shape by press molding, but it is soluble in the solution during cleaning treatment after etching or electrolytic processing. Materials such as water-soluble colloid type, polycinnamic acid type,
Water-soluble or organic solvent-soluble ink such as cyclized rubber type, quinone diaside type, and marker ink.

The material of the metal corrosive liquid is generally an acid, such as a single wave or a composite liquid such as ferric chloride, nitric acid, hydrochloric acid, picric acid, or an aqueous solution thereof, and the material of the dissolving liquid is one for cyclized rubber. As, carbolic acid.

These include mixtures of ethylene tetrachloride, dichlorobenzene, alkylbenzenesulfonic acids, etc., mixtures of sulfuric acid and hydrogen peroxide, and water-soluble colloids, polycinnamic acid, and quinone diazide.

Organic solvents such as acetone, alcohol, and trichlorethylene are used for marker ink.

FIG. 2 shows a partially enlarged basic configuration of the molding material A1 of the second invention, and the material of the metal blank 10 in this molding material A1 is the same metal material as the metal blank 1 in the first invention. From these, the most suitable material is selected depending on the metal product to be molded, and the product is molded into a continuous band of the required width and thickness.

A processed surface 11 is applied entirely or partially to the plate surface 10a and/or 10b of the metal material 10, and this processed surface 1
1 as a medium, the entire surface of the plate is coated with a corrosion-resistant film 12 that is not attacked by metal corrosive liquid, and the processed surface 11 and the plate surface 1
0a.

10b is prevented from being damaged even when the product shape is formed using a press.

The processed surface 11 is a plated surface of various types for decoration and anti-corrosion of the board surface, or a printed surface shown in drawings. selected.

The corrosion-resistant film 12 is made of a material that is not attacked by the metal corrosive solution during etching or electrolytic processing after forming the product shape, but dissolves in the solution during cleaning processing after etching or electrolytic processing. The material is the same as the corrosion resistant 1 m2 explained in the first invention, and the material of the metal corrosive liquid and the solution are also the same as the metal corrosive liquid and the metal solution explained in the first invention, so the explanation will be omitted.

FIG. 3 shows a partially enlarged basic configuration of a molding material A2 when the metal product is a printed circuit board as another embodiment of the second invention, and shows the material of the metal blank 20 in this molding material A2. Among the materials for the metal blank 1 described in the first invention, a material with particularly high rigidity and heat dissipation efficiency, such as aluminum, is selected and formed into a continuous band or plate shape of the required width and thickness. .

A processed surface 21 consisting of a lower layer insulating surface 21a and an upper layer printed wiring surface 21b is applied to the plate surface 20a and/or 20b of the metal blank 20, and this processed surface 21 is used as a medium. The entire surface of the board is coated with a corrosion-resistant film 22 that is not affected by metal corrosive liquid, so that the processed surface 21, that is, the insulating surface 21a, the printed wiring surface 2111, and the board surface are not damaged even when the product shape is formed by press. That's what I do.

The lower insulating surface 21a of the processed surface 21 is made of a material that is highly insulating and does not interfere with press molding into the product shape, specifically polyethylene, boli-O-pyrene, polyester, other synthetic resins, ceramics, etc. It is preferable to use a material such as rubber, which has adhesive properties with the plate surface and the processed surface, and is also mixed with a bamboo material, and is made of aluminum and is used to ensure the connection between the conductive metal base plate 20 and the printed wiring surface 20b. It is interposed between the board surface and the printed wiring surface 21b so as to be insulated.

Corrosion resistance [122] is a material that is not affected by the metal corrosive solution during etching or electrolytic processing after forming the product shape, but dissolves in the solution during cleaning processing after etching or electrolytic processing. The material is the same as that of the corrosion-resistant film 2 explained in the first invention, and the material of the metal corrosive liquid and the dissolving liquid are also the same as the metal corrosive liquid and the dissolving liquid explained in the first invention, so a description thereof will be omitted.

Next, examples of molding the metal product B using the molding materials A, A+, and A2 will be described using specific examples.

Figure 4 shows an example of forming a metal product B using a forming material, in which the forming material A is intermittently and continuously transferred through the first to fourth steps, and in the first step ■, it is press-formed into a predetermined product shape. It is formed into the shape of a semi-finished product Ba, and in the second step (3), it is immersed in the above-mentioned metal corrosive liquid 32, and the press burr b1 and shear surface roughness b2 are corroded and shaped by the metal corrosive liquid 32 to form the product body Bb shape. The plate is shaped, and in the third step (3), it is immersed in the above-mentioned solution 34 to remove the corrosion-resistant film 2 on the plate surface.
In the fourth step IV, it is washed with water, dried, and manufactured into a product.

In the first step I, a press machine 30 press-forms a molding material A whose plate surface is covered and protected with a corrosion-resistant film 2 into a predetermined product shape to obtain a semi-finished product 3a.

In the second step (2), the semi-finished product Ba with the breath burr b1 and the shear surface roughness b2 is immersed in the metal corrosive liquid bath 31, and the exposed breath burr b1 not covered with the corrosion-resistant film 2 and the shear surface roughness b2 are removed with the gold ff1X etchant. 32 to remove the press burr mark B+ and the shear surface roughness mark B2 into a smooth mirror-like product body Bb.

In the third step (2), the product body Bb is immersed in the solution bath 33, and the corrosion resistant film 2 on the plate surface is dissolved by the solution 34 and removed from the product body Bb.

In the fourth step (2), the metal product B, which has been substantially made into a product in the third step, is washed with water in the washing device 35 and dried in the drying device 36, thereby cleaning the entire surface of the product.

Figures 8 and 9 show an integrated circuit frame B (Figure 8) as an example of an endless band-shaped metal product formed by the above molding example.
and gimbal springs (Fig. 9), and these products B have plate surfaces 1a and 1b and the second
Even the press burr mark B1 and the shear surface roughness mark B2 formed in the process are maintained in a mirror-like state with no damage on the entire surface. As a result, the integrated circuit frame is completely free of cracks that can damage objects that come into contact with it, and no roughness on the sheared surface that could cause particles to fall off, and there is no risk of damage to objects that come in contact with particles or particles, as well as electrical accidents such as short circuits and cross-wires. I have no worries at all. Furthermore, there is no damage to the frame surface, and no plating treatment for corrosion protection is required.

FIG. 11 shows an example of forming metal product B using forming material A1, in which forming material A+ is used in the press device 30 in the first process.
The semi-finished product Ba that has been press-molded into a predetermined product shape is dropped and stored in, for example, 137, and is then passed through the second to fourth steps while being placed in 137.
Through step IV, the metal product B is formed into a fixed shape. The second step (2) to the fourth step (2) in this molding example are performed in the same manner as the second step (2) to the fourth step IV in the molding example of the molding material A described above.

FIG. 12 shows a steel belt for a floppy disk as eight examples of fixed-shaped metal products formed by the above-mentioned forming example. Protected printing surface 1
1, the plate surfaces 10a and 10b, and the press burr marks B1 and shear surface rough marks B2 shaped in the second step, there is no damage on the entire surface including the printed surface 11, and the entire surface except the printed surface 11 is in a mirror-like state. It is maintained. As a result, steel belts for floppy disks are completely free of burrs and sheared surface roughness that could damage objects they come into contact with or cause them to fall off due to their own sliding, and there is no risk of damage to objects that come in contact with burrs or fine particles, as well as short circuits in the disk. Not only is there no need to worry about electrical accidents, but there is no operational resistance due to cracks or sheared surface roughness, resulting in good operability. Furthermore, there is no damage to the belt surface or the printed surface, no plating treatment is required for corrosion prevention, and there is no concern that the printed display will become unclear.

FIG. 14 shows an example of molding a metal product, that is, a printed wiring board B, using the molding material A2.
In step T, the press machine 30 press-forms a printed wiring board with a predetermined product shape, and in this first step, the mounting is done through hole 2.
The semi-finished product 3a, which has been die-cut into a product shape, including items 3 and 3, is dropped into a basket 37 and stored therein, and then, while being placed in the basket 37, passes through the second process (■) to the fourth process (IV), and is then printed. It is formed into wiring board B.

The second process ■ to the fourth process ■ in this molding example are the second process ■ to the fourth process ■ in the molding example of the molding material A1 above.
It is done in the same way.

FIG. 15 shows an example of a printed wiring board molded by the above molding example, and this printed wiring board B achieved corrosion resistance of 1 in the third step. The printed wiring surface 21b, the insulating surface 21a, and the plate surface 20a were protected until 22 was melted and removed.

20b and the press paring marks B+ and shear surface roughness marks B2 shaped in the second step and the mounting hole 23 are completely undamaged and the entire surface except the printed wiring surface 21b and the insulating surface 21a is kept in a mirror-like state. It's dripping. As a result, printed wiring boards do not have any cracks that can damage objects that come in contact with them, or roughness on the sheared surfaces that can cause particles to fall off.
There is no need to worry about damage to objects in contact with particles or electrical accidents such as short circuits or crosstalk, and there is no damage to the printed wiring surface, so there is no need for plating for corrosion protection. Furthermore, the aluminum molded element, which is integrally formed on the front and back sides through the printed wiring surface and the insulating surface, has the necessary and sufficient strength, and can be used in a wide variety of shapes, from small to large, and with a high degree of irregularity. In addition, the high heat dissipation efficiency suppresses the temperature rise of the printed wiring surface and keeps the printed wiring surface at room temperature.

As described above, by using the molding material of the present invention, it is possible to mold various metal products with smooth and scratch-free surfaces.

In addition, the immersion etching in the second step (3) in each of the above molding examples can be freely performed in other spray or paddle molding examples, and it is also free to carry out electrolytic processing.

(Effect of the invention) Therefore, the present invention has the following advantages.

■ Each surface is coated with a corrosion-resistant film that is uncorrosive to metal corrosive liquids, protecting each surface from damage from external forces and press pressure until the end of the product shape forming process. A metal product that is formed into a shape and then etched with a metal etching solution or electrolytically processed to remove the shape forming edge, that is, the press parry and press shear surface roughness,
Each surface can be smooth without any scratches.

(2) Suitable for various metal products that can be press-molded into product shapes, especially for parts of various electrical or electronic devices that do not allow the presence of particles or fine particles at all.

(2) By forming the product shape by press molding and then etching or electrolytically processing the shape forming edges, it is useful in that metal products of various shapes can be freely formed in large quantities in a short time.

[Brief explanation of the drawing]

Fig. 1 is a partially enlarged perspective view showing one embodiment of the first invention of the molding material of the present invention, Fig. 2 is a partially enlarged perspective view showing an embodiment of the second invention, and Fig. 3 is a partially enlarged perspective view showing an embodiment of the second invention. FIG. 4 to FIG. 10 show an example of molding a metal product using the molding material shown in FIG. 1, and FIG. 4 is an overall process diagram.
Figure 5 is an enlarged cross-sectional view taken along line (5)-(5), Figure 6 is an enlarged cross-sectional view taken along line (6)-(6), and Figure 7 is an enlarged cross-sectional view taken along line (6)-(6).
)-(7), FIG. 8 and FIG. 9 are plan views showing partial examples of metal products molded by the same molding example, and FIG. A partially enlarged sectional view along the line. 11 to 13 show an example of metal products molded using the molding material shown in FIG. 2, FIG. 11 is an overall process diagram, and FIG. 12 is a plan view showing an example of a metal product molded by the same molding example. Figure 13 shows (13)-(13)I! Partially enlarged sectional view that can be followed. Figures 14 to 16 show examples of molding metal products using the molding material shown in Figure 3, and Figure 14 is an overall process diagram;
FIG. 5 is a plan view showing an example of a metal product molded by the same molding example, and FIG. 16 is a partially enlarged sectional view taken along line (16)-(16). In the figure, A, A+, A2 are molding materials B are metal products 1.10.20 are metal blanks 1a, 1b, 10a, 10b, 2
0a, 20b are plate surfaces 2, 12, 22 are corrosion-resistant films 11, 21 are processed surfaces 21a, insulating surfaces 21b, and printed wiring surfaces 32 are metal corrosive liquids (FIG. 2-8). Figure 3

Claims (7)

[Claims] (1) In metal products that are press-formed into a product shape and the shape-forming edges are etched with a metal corrosive liquid or shaped by electrolytic processing, a corrosion-resistant film that is not damaged by the metal corrosive liquid is applied to the entire surface of the metal blank. Molding material for metal products coated with (2) In metal products that are press-formed into a product shape and the shape-forming edges are etched with a metal corrosive solution or shaped by electrolytic processing, various surface treatments are applied to the surface of the metal blank, and the processed surface is A molded material for metal products that is made by coating the entire plate surface with a corrosion-resistant film that is not affected by metal corrosive liquids. (3) The above-mentioned corrosion-resistant film is water-soluble or organic solvent-soluble, such as a water-soluble colloid type, polycinnamic acid type, cyclized rubber type, quinone diaside type, marker ink, etc. A molding material for metal products as described in item 2. (4) The molded material for metal products according to claim 1 or 2, wherein the metal corrosive liquid is an acid such as ferric chloride, nitric acid, hydrochloric acid, or picric acid, or a composite liquid or aqueous solution thereof. . (5) The molded material for a metal product according to claim 2, wherein the processed surface is a plated surface. (6) Claim 2, wherein the processed surface is a printed surface.
Molding materials for metal products listed in section. (7) The molded material for a metal product according to claim 2, wherein the processed surface has a two-layered structure, the lower layer on the plate surface side being an insulating surface, and the upper layer being a printed wiring surface.