TW200823322A - Intermediate of magnesium or magnesium based alloy and method of manufacturing the same - Google Patents

Abstract

To provide an intermediate of magnesium or a magnesium based alloy capable of excellently treated with a stable quality. In the intermediate of magnesium or the magnesium based alloy electrolyzed by bringing an electrode into contact with an electrode contact part 21 provided around a formed part 16, a plurality of the electrode contact parts 21 are formed around the vicinity of the formed part 16.

Description

200823322 IX. Description of the Invention: TECHNICAL FIELD OF THE INVENTION The present invention relates to an intermediate of magnesium or a magnesium-based alloy (hereinafter referred to as "the magnesium material") and a method for producing the same. [Prior Art] Magnesium is the lightest of practical metals, and its thin-walled products are excellent in specific strength, electromagnetic shielding, heat dissipation, vibration damping, etc., and have less regenerative energy for recycling. Etc. Therefore, in recent years, it has been widely used in various fields such as communication equipment, computer equipment, optical equipment, and sporting goods. / 7 cattle and magnesium materials have the above-mentioned characteristics, but on the contrary, they are required to improve the corrosion resistance (corrosion resistance) of the product due to the ease of corrosion. This surface treatment is carried out by various methods such as anodizing treatment, plating treatment, coating, and chromate treatment. In the anodizing treatment, it is known that an external power source is used, and the molded article made of the magnesium material is connected to the main body of the masculine/p... A film such as an oxide or a metal salt is formed on the surface of the mouth. In addition to the treatment for improving corrosion resistance (corrosion resistance), i sweat can be applied for various purposes such as improving wear resistance, coating primer treatment, and imparting lubricity. In the past, a molded article obtained by subjecting a magnesium material to pressurization (plastic) processing, weaving pressure, and a two-pray-concave forming process has a projection, a concave portion, a lower portion, and the like; #

Mm is uneven, and when a molded article having a thickness of 5 Å is attached to a Reing nozzle for 1% gasification, the distance between the molded article and the opposite electrode is localized by the unevenness of the surface. difference. _ (Yin 5 200823322 = This 'molded article (anode) and the opposite electrode (the shape of the film formed by the surface of the molded product by the negative energy m:: thickness, density, etc.) is not good, and it is difficult to form a quality fixed film. In the case of, for example, a stain or a cautery, the quality is lowered. An emulsion film or an oxide film... a resistive film. The film is formed by forming a resistive film on the entire surface of the molded article, and the anodizing treatment is performed when the anodizing treatment is performed, and the effect of the unevenness is made. For the surface treatment of the material, for example, the following patent documents are available. Patent Document 1: Japanese Patent Laid-Open Publication No. 2001-192872 (Patent Document No. 2) No. JP-A No. 9-241897, Patent Document 3: JP-A-2-2 (3) [Explanation] Wearing an anode of oxygen: a molded article in which a resistive film is formed on the entire surface of a molded article is placed in an electrolytic bath for 5% emulsification, and is formed by anodizing, because of the resistive film Two = between the poles, so the resistance between them is high, "French products and electrochemical treatment. ... go to good anode oxygen: although the description of the anodizing treatment, the eight-electrolysis treatment also produced The same problem. 'Further, the object of the present invention is to provide an intermediate which can eliminate the point and can perform good electrolytic treatment with high quality and stability. The intermediates and the manufacturing method thereof are the same, and the alloy base alloy 6 200823322 In the first aspect of the present invention, the magnesium-based alloy is in the form of a magnesium contact or a contact portion of the electrode: the electrode portion is provided at the periphery of the electrode portion, and the electrode is contacted by the first electrode for electrolysis treatment. A plurality of electrode contact portions are formed on the periphery of the shaped portion. In the first aspect of the invention, in the first means, the plurality of electrode contact portions are wg to surround the forming portion. Form formation. The present invention eve ► Chu 1 <

According to the third aspect, the third aspect means that a resistive film is formed on the surface of the forming crucible. According to a fourth aspect of the present invention, in the third aspect, the resistive film contains magnesium hydroxide. According to a fifth aspect of the present invention, in the first aspect, the molding portion m is formed in plural at a predetermined interval, and the electrode contact portion is formed at a position intermediate the molding portion and the adjacent molding portion. ^ The sixth means of the present month is a method for producing an intermediate of a magnesium or magnesium-based alloy, which is characterized in that it has the following process: · A material composed of a magnesium or a magnesium-based alloy is processed to have a formed portion and An intermediate portion of the electrode contact portion; the electrode contact portion of the intermediate body is masked by a mask member such as a strip; a resistive film is formed on the surface of the masked intermediate; an intermediate forming the resistive film is formed An electrolytic treatment is performed; and the mask member is removed from the intermediate body subjected to the electrolytic treatment. The seventh aspect of the present invention is a method for producing an intermediate of magnesium or a magnesium-based alloy, which is characterized by comprising the following process: processing a material composed of a town or a ruthenium-based alloy to form a middle portion having a forming portion Forming a resistive film on the surface of the intermediate; removing the resistive film from the portion corresponding to the electrode contact portion of the intermediate portion on which the resistive film is formed; and contacting the electrode at the electrode contact portion from which the resistive film is removed to perform electrolytic treatment.

According to an eighth aspect of the present invention, the resistive film contains magnesium hydroxide. According to a ninth aspect of the invention, the ninth aspect of the invention, wherein the resistive film corresponding to the electrode contact portion is removed by an acid such as an organic carboxylic acid. According to a tenth aspect of the present invention, in the sixth or seventh aspect, the forming portion is formed in plural at intervals from a predetermined interval, and the electrode contact is formed at a position between the forming and the adjacent material. unit. According to an eleventh aspect of the present invention, in the sixth or seventh aspect, the electrolysis treatment is anodizing. Λ In the present invention, as described above, since a plurality of electric contacts are formed around the molded portion, the molded portion can be subjected to electrolytic treatment without any difference, and a good electrolytic treatment can be performed. In addition, according to the above, the present invention is composed of: ^ 4 奉} { 47 47 pq 4 field in the electrode contact portion of the intermediate opening ^' on the surface of the intermediate to form a resistive film, so the electrode contact portion is not filmed 'The electrical contact between the intermediate and the electrode is good, and the delicious scallops are well electrolyzed. 8 200823322 Further, in the present invention, as described above, since the resistive film of the intermediate portion of the resistive film and the electrode contact portion is removed, the electrode contact portion is in contact with the electrode for electrolytic treatment, so the intermediate body and the electrode The electrical contact is good, and the electrolytic treatment can be performed with good quality and stability. [Embodiment] Next, an embodiment of the present invention will be described together with the drawings. Fig. 1 is a flow chart for explaining a thermoplastic processing method according to a first embodiment, and Fig. 2 is a schematic configuration of a thermoplastic processing apparatus of a continuous press type according to an embodiment. First, the thermoplastic processing method of the present invention will be described using FIG. Hot rolling of the magnesium material is carried out in the step shown in the figure (hereinafter referred to as S). This hot rolling has a hot roll method in which a roll is heated, and a cold roll method in which a roll is not heated. In the calendered sheet, a processed aggregate structure in which the bottom surface of the hexagonal crystal is arranged in parallel on the sheet surface is formed. The coffin' is a pure town or magnesium alloy with a purity of 99%. The town alloy may, for example, be a Mg-A1-Zn alloy, a Mg-Zn_Zr alloy, a Mg-A1 alloy, or a Mg-rare earth alloy. The Mg-Al-Zn alloy, specifically, AZ31A, AZ31B, AZ31C, AZ61A, AZ80A, AZ91 and the like. The Mg-Zn-Zr alloy is specifically ZK51A, ZK61A, ZK60, M6, M5, M4 and the like. The Mg-A1 alloy, specifically, AMI00A or the like. The Mg-rare earth element alloy, specifically EZ33a, ZE41A, QE22A, etc., is added to the crystal grain boundary by adding a rare earth element (RE: magnesium lanthanum alloy or titanium lanthanum, mainly Ce or/and Nd) Mgi2RE will be 9 200823322 and 'hunting by Ag or γ crystals # 'specially increase the resistance to latent denaturation, safety limit stress will be significantly improved. ~80叩(More Λ 〇-, preferably the use of control is 〇·1μΐΏ inside. I 5’, and even better is 1_~3〇 handsome)

If the average grain size is less than 8〇_, then the (grainability), if the average grain size exceeds 8〇_, the average grain size is less than 〇. In particular, the elongation is lowered, so that it is impossible to perform the molding. Therefore, in order to maintain good characteristics, for example, to maintain good workability (formability), it is necessary to control the average crystal size; L to be in the range of 〇·1 to 8〇μηη. Further, the average particle size of the slag, for example, can be adjusted by the S-delay condition of the material (the circumferential speed or heating temperature of the lap roll), the annealing conditions (annealing temperature, annealing time, and annealing atmosphere). Wait, control the desired value. The thickness of the workpiece is suitably in the range of 3 〇 μηι to 15 〇 μηι. Next, at S2, the black skin portion of the surface of the rolled material is subjected to (carbon, 矽) grinding to mechanically remove the black skin, and the s3 is again finely rolled to serve the desired workpiece. In the surface of the workpiece, carbides, oil and fat components, and other dirt are adhered to the surface of the workpiece, and in order to remove the particles, the workpiece is washed with an organic solvent such as a diluent or a surfactant (S4). / Next, at S5, a magnesium hydroxide layer is formed on the entire surface of the workpiece. The magnesium hydroxide layer is formed by adding an appropriate amount of sodium hydroxide to the aqueous sodium nitrite solution and stirring to maintain the temperature of the treatment solution in the range of 12 〇〇 c 14 14 ° C. The concentration of the sodium nitrite aqueous solution is 5 〇 g / L ~ 1 〇〇 g / L is 200823322 is also suitable as ~ ~ published Dg / ^ L is appropriate. In the heated treatment, the solution is dissolved in a mixture of liquid and liquid, and the workpiece is crushed for 5 minutes to 5 minutes. ─Because of the degree of contamination of the workpiece, the m p(5) column takes 疋 时间 time, so the immersion time has the above range. After the impregnation, the workpiece was taken out from the treatment solution and washed with water, and the above-mentioned financial treatment was carried out so that the surface of 1 was milky white and dull, and the hydrogen-oxygen domain layer of (4) was formed on the entire surface of the workpiece. By immersing in the aqueous solution of the succinic acid solution, the surface of the workpiece can be surely removed by the deposit of the S4, which is not completely removed by the organic solvent, and the surface of the workpiece is cleaned and formed on the surface thereof. Magnesium hydroxide layer. By forming a hydroxide town layer on the entire surface of the workpiece, a long-term surface property f-stabilized dust material can be obtained, followed by a force S6, and the workpiece before the pre-treatment is immersed in the lubricant liquid for a predetermined period of time. A magnesium ruthenium layer is formed on the surface. As the slip agent, for example, an aliphatic carboxylic acid salt having an unsubstituted or substituted carbon number of 6 to 24, and an unsubstituted or substituted carbon number of 7 to 2 Å can be used. At least one of the organic compounds in the group consisting of carboxylates. The aliphatic carboxylate, the aliphatic chain may be linear or branched. Also, it can be saturated or unsaturated. The carbon number in the molecule is preferably from 1 〇 to 24, more preferably from 8 to 22. An aliphatic carboxylic acid of a fatty acid salt such as hexanoic acid, 4-mercaptopurine, 2-ethylbutyric acid, 2,2-dimethylbutyric acid, heptanoic acid, caprylic acid, citric acid, Six I, undecanoic acid, lauric acid, myristic acid, palmitic acid, heptadecanoic acid, stearic acid, icosonic acid, behenic acid, isostearic acid, and the like. 11 200823322 Further, the salt of the aliphatic carboxylate is, for example, an alkali metal salt, an alkaline earth metal-amine salt or a salt, and is preferably a metal salt or a soil-based metal salt. Further, examples of the substituent of the aliphatic citrate include a thiol group, a slow group, an amine group, an anthracene group, an ethylenic group, a halogen atom and the like. The degree of substitution is 5 or less, preferably 3 or less, more preferably 〇 or i. Preferred organic compounds of aliphatic carboxylic acid salts, for example, sodium oleate, sodium laurate, sodium myristate, sodium stearate, sodium docosalate, sodium urate, sodium octadecanoate, isostearic acid Sodium, sodium 2-decadate, etc. The aromatic carboxylate in the above aromatic carboxylate is preferably 7 to 2 Å, more preferably an aromatic citric acid of a serotonin, such as benzoic acid, benzene, 'isophthalic acid, terephthalic acid , dicarboxylic acid, trimellitic acid, tetradecanoic acid, naphthoic acid, and the like. The salt of the scented carboxylic acid salt, for example, an alkali metal salt, an alkaline earth metal ruthenium, an amine salt, an ammonium salt, etc., in particular, a metal salt and a soil-based metal salt are preferred as a substituent of the fragrant acid salt. For example, there are a thiol group, a sulfhydryl group, an amine group, a sheep: an acetyl group, a halogen atom, an alkyl group of a carbon number, and the like. The degree of substitution is ', ', 5 or less, preferably 3 or less, more preferably 〇 or 1. Preferred organic compounds of the aroma are, for example, sodium benzoate, potassium methoxide, sodium isophthalate, p-benzoquinone, and the like. Others, such as sodium methacrylate, viscosity regulator, and lubricant, may also be added as needed, such as rust inhibitors, oxidizing agents, defoamers, pH adjusters, and the like. 12 200823322 In this embodiment, sodium stearate and sodium hydroxide are added to water to dissolve. The heating of the lubricant solution is maintained within (9) it is within the temperature range of 丨(10). The amount of the sodium stearate added is from 8 g/L to 12 g/L. By immersing the workpiece in the lubricant solution, a magnesium hydroxide layer on the surface of the workpiece chemically reacts to form a magnesium soap layer composed of magnesium carboxylate. The dipping time of the workpiece, to! Minutes ~ 5 minutes are appropriate. The workpiece having the magnesium soap layer formed thereon is attached to a thermoplastic processing apparatus to be described later to perform predetermined thermoplastic processing (S7). • A schematic configuration diagram of a thermoplastic processing apparatus of a continuous pressurization type according to the embodiment. The thermoplastic processing apparatus is as shown in the drawing, and the intermittent conveying mechanism 4, the forming processing apparatus 5, and the cutting mechanism 6 are disposed along the traveling direction X of the processing process. A strip-shaped workpiece 2 wound in a roll shape is attached to the intermittent conveyance mechanism 4. On the surface of the workpiece 2, a town 4 layer 3 is formed in FIG. The strip-shaped workpiece 2' is held by the clamping mechanism 7a, 7b of the (four) core (four), and the predetermined conveying pitch P and the enthalpy are intermittently directed toward the forming processing mechanism 5 side. The 4th part of the 8th and the mth work organization 5 are equipped with the first! The forming portion 8a, the second forming portion 8b, the third ^^^ Λ ^ ^, the forming 邛 8c, and the fourth forming portion 8d, and the ritual forming portions 8a to 8d are along the traveling direction X of the processing cut. Settings. The first forming part 8a, # is 筮, π is more and more "the fixed side pressurizing metal mold 8 is formed by the movable side twisting metal mold 8a-2, and the second side is added by the second fixed side metal mold 8b_l It is constituted by the second mold 8b-2, and the third molding portion 8 is made of a metal core. The third molding portion is made of a fixed side of the metal 13 200823322. The mold 8c-1 and the third movable side pressing metal mold 8c-2 are formed. The portion 8d is composed of a fourth fixed-side press metal mold and a fourth movable-side press metal mold 8d-2. Each of the solid-side pressure metal molds 8a-1 to 8d-1 is attached to the fixed plate 9, each of which is attached to each other. The movable side twisting metal core 8a-2~8 d-2 is cracked on the movable plate 1〇. The metal mold and the movable side pressure metal molds 8a-2 to 8d-2 are fixed on the fixed sides, and built-in. There are an electric heater 丨丨 and a temperature sensor (not shown), for example, 200 C to 250. Temperature control is performed individually in the range of 〇. _ Around each fixed side press metal mold 8a-l~8d-l The pressing member 12 is slidably disposed, and each of the pressing members 12 is biased by the respective movable side pressing dies 8a_2 to 8^2 in the upward direction of the spring 13. The first forming portion 8 The interval p2 between the a and the second molded portion 8b, the interval P3 between the second molded portion 8b and the third molded portion 8c, and the interval P4 between the third molded portion 8c and the *formed portion 8d are all at a distance from the workpiece 2 In an equal manner, the position of each forming portion 8 is determined. The movable disk 10 to which the movable side pressing metal molds 8a_2 to 8d-2 are attached is supported by a plurality of rods so as to be movable up and down, and is mounted on the plural A hydraulic cylinder (not shown) is fixed to the top plate of the head of the root rod. The hydraulic cylinder 10 moves the movable disk 10 up and down by a predetermined stroke, and when it is lowered, the metal mold 8a_2 is pressed by each movable side. 8d_2 The position of the heating mode in contact with or close to the workpiece 2 and the position of the press forming mode in which the workpiece 2 is pressed against the fixed side pressurizing dies 8a-1 to 8d-1 to determine the position. The movable disk 1〇 (movable side pressurizing metal molds 8a-2 to 8d-2) is shown in a state in which the standby position is displayed. 14 200823322 The force 2 and 3 are the heating of the workpiece 2 shown in the first forming portion & The surface of the ',, and nuclear position of the state. Press the head of the metal mold on the fixed side of the 帛1 a dome-shaped projecting ridge 14a is provided, and on the other hand, the pressurizing metal mold on the i-th movable side is formed on the bottom surface of the 8a 2 ώ 2: 2, and is formed in a dome shape corresponding to the protruding portion 14& The recessed portion l5a. As shown in Fig. 2, when the movable disk 1 〇 (the movable side pressing metal mold 8a'2) is in the standby position, the workpiece 2 is held by the clamping mechanisms 7a, 7b: On the side of the cast metal mold, after the workpiece 2 is sent out for a predetermined length f, the gripping mechanisms 7a and 7b are retracted from the position of the broken line to the standby position of the solid line in an open state. Then, the movable side pressing metal mold 8a_2 is lowered to the heating mode position, and the bottom surface of the flat workpiece 2 is in contact with the head of the fixed side pressing metal mold. The top surface of the workpiece 2 is in contact with the bottom surface of the movable side pressing metal mold 8a-2, and the periphery of the workpiece 2 to be formed is the bottom surface of the movable side pressing metal mold 8a_2 and compacted. The member 12 is elastically held. For example, the above-mentioned 4' solid-side pressing metal mold 8a_1 and the movable-side pressing metal mold 8a_2 are internally heated with a heater ii and heated to a predetermined temperature, and the pressing member 12 is also pressed with the fixed side pressing metal mold. 8a_〗 Contact and heat conduction becomes a high temperature state, so that the workpiece 2 is to be formed by contacting or approaching the fixed side pressing metal mold 8a-1, the movable side pressing metal mold 8a-2, and the pressing member 12 The part and its surroundings are heated. By maintaining the state of the heating mode of Fig. 3 for a predetermined time (e.g., 5 seconds to j), the thin-plate-shaped workpiece 2 is heated to a degree suitable for thermoplastic processing 15 200823322 (for example, 'with the fixed side pressure The metal mold 8a_1 and the movable side pressure metal cooker 8a-2 are approximately the same temperature 2 〇〇 it is about ~25 〇〇c). The heating mode time can be appropriately adjusted depending on the thickness, material, thermal characteristics, forming shape or size of the workpiece 2. Further, since the heating mode is as short as described above and the heating temperature is low, there is no need to worry about the growth of crystal grains and the workability is lowered. Thereafter, by pressing the movable side pressurizing metal mold 8a_2 toward the fixed side pressurizing mold 8a], the pressing member 12 is lowered toward the lower side against the elasticity of the elastic members 3, by the protruding portion 14a and the opposite side. Concave! 5a, make the workpiece 2's. The file is press-formed into the same shape as the above. In the press forming, since the periphery of the portion to be applied is firmly pressed by the movable side pressing metal mold by a pressing member 12, the peripheral portion can be prevented from being generated.

Once the processing of the first paragraph is completed, the movable plate is lifted by the hydraulic vapor red, and the position is shown in the position of Figure 2! The portion of the workpiece 2 formed by the molding portion 8a is sent to the next second molding portion by the conveyance operation of the chucking mechanisms 7a and 7b. The second molding portion 8b to the fourth molding portion 8d are intermittently transported in sequence, and the heating and plastic working of the workpiece 2 can be repeated. Finally, a plurality of dome-shaped portions 16 can be continuously formed on the workpiece 2 as shown in FIG. Returning to Fig. 2, the guard 2 of the forming machine 5 as described above is sent to the cutting mechanism 6. The cutting mechanism 6' includes a cutter portion 18 attached to the fixed disk 9 and attached to the movable disk 1G, and a counter 19 connected to a control portion (not shown). The counter 19 can be used to measure the number of times the workpiece 2 is transported by the intermittent transport mechanism 4, 200823322, or the pressurization money of the wire lifter 5, and the formed portion formed by the test and the workpiece 2 (the present embodiment is a dome-shaped cymbal) The number of 16). If the formed portion on the member 2 has been formed to a predetermined number and passes under the cutter portion a, the cutter portion 18 is extended to cut the workpiece 2, and a rectangular formed piece 20 as shown in Fig. $ is obtained. The formed piece 20 is moved to a subsequent mask process, a resistive film forming process, an anodizing process, and an electrodeposition coating finishing process, and then the formed portion (the dome portion 16 in the present embodiment) is a workpiece 2 cut away. As shown in Fig. 5, the periphery of the molded portion of the molded piece 20 (the dome portion 16 in the present embodiment) is formed with a plurality of holes 21 penetratingly arranged. Further, as shown in the figure, the formed portion (the solid (four) state is the dome-shaped portion 16) is formed by a plurality of intervals at intervals, and the left and right sides of the intermediate portion of the formed portion are formed separately & 21, each forming portion is surrounded by a plurality of holes 2 (four holes 21 in the present embodiment). The hole 2i can be formed, for example, at the final stage of the forming and processing mechanism 5 by the fourth forming portion 8d. • Returning to Fig. 1, after the thermoplastic processing (7), at S8, the hole 21 other than the formed portion of the molded piece 20 (the dome portion 16 in the present embodiment) is covered as shown in Fig. 6. Strip 22 is covered. In the present embodiment, since the holes 21 are formed at equal intervals on both side ends of the molded piece 20, the mask strips 22 are attached along both side ends of the molded piece 20. Further, the mask of the mask strip 22 is applied to both the front surface and the back surface of the formed sheet 20. In the present embodiment, a mask strip is used as the mask member, but a pressing member may be used instead of the mask strip, and the formed sheet 2 is formed with a hole 21 17 200823322 to be pressed by the double-sided clip. Hold the mask. If it is a pressing member, it can be used for masking several times, and the manufacturing cost can be reduced. Next, at S9, a resistive film 23 is formed on the surface of the masked molded piece 2A. In the present embodiment, an appropriate amount of sodium hydroxide is dissolved in the sodium nitrite water solution, and the masked formed sheet 2 is immersed in a solution in which the liquid temperature is maintained within a range of 12 〇 14 〇乞 14 〇乞. Thus, the resistive film 23 is formed on the entire surface of the formed sheet 2''. The concentration of the sodium nitrite aqueous solution is preferably 395 g/L to 405 g/L in an amount of 5 〇g/L to 1 〇〇g/L and sodium hydroxide. Although the sodium nitrite is used in the present embodiment, the resistive film 23 may be formed using a chromic acid system, a selenate salt system, a stannic acid system, a strontium salt system or the like. It is preferable from the viewpoint of the stability of the membrane quality or the treatment of the waste liquid because the sodium sulfite is not a metal. After the resistive film 23 is formed, the mask strip 22 is formed from the formed sheet 20

(s1〇). In the state of the formed sheet 2 after peeling, as shown in Fig. 7, an in-line conductive portion 24 in which the surface of the resistive film 23 (four) is not formed is formed in the hole 21 and its periphery. # When the pressing member is used as the mask member as described above, the pressing member is removed from the formed sheet 2 () # as a mask (si〇). After the mask removal (S1G), anodizing treatment (sii) is performed on the formed sheet 2 (). The anodizing treatment (su) is composed of three processes of pretreatment, oxidation treatment, and post treatment. The pretreatment is a treatment for removing the core material attached to the formed sheet 20, specifically, washing. Since it is a testability, it can be used in the dangers of >&&&> For example, sodium hydroxide. It is composed of a mixed aqueous solution of ethyl alcohol and sodium sulphate, and is maintained in an electrolytic bath of 75 ° C to 80 ° C. At the time of the energization, as shown in FIG. 8, the holes 21 of the y, Λ or open 'slices 20 are inserted into the electrode needle group 25, and the 5 electrode group 2 5 is connected to the thunder, and undercast , solve the '% of the slot. Since the hole is formed in the hole of the hole 21 and the periphery of the hole 21; the gate film is not formed with the resistive film 23, so that the electrical connection between the molded piece 2Q and the electrode pin group 25 is good.

At the same time, since the resistive film 23 is formed on the surface of the swarf and the scorpion + in the forming portion (the sorrow is the dome-shaped portion 16), even if the forming port P has irregularities, the embossing of the embossing 7阳极 θ θ θ θ θ θ θ θ θ θ θ θ θ θ θ θ θ θ θ θ θ θ θ θ θ θ θ θ θ θ θ θ θ θ θ θ θ θ θ θ θ θ θ The electrode needle group 25, the electrolytic bath, and the cathode (both not shown) are made of an insoluble material such as steel, stainless steel, or carbon. After the oxidation treatment, the water is washed, washed with hot water, and dried, and anodized to form an oxide film on the surface of the formed sheet 20. The oxidized film has (4) as an internal metal, and serves as a base film for coating. Because I is finished at the anodizing point, the finishing is finished. If necessary, it is also possible to apply a dye between the % polar oxidation treatment (S11) and the electrodeposition coating fine addition of ysl2), for example, by a secondary collapse method or the like. After the electrodeposition coating finishing, the formed sheet (9) is sequentially rounded. H6 punching 'The dome-shaped portion 16 can be used as an acoustic speaker. 9 to FIG. 9 are for explaining the second embodiment of the present invention, and FIG. 19 is a flow chart for explaining the thermoplastic processing method of the embodiment, and FIGS. 10 and 11 show the formation of the embodiment. A perspective view of the middle of the film. In Fig. 9, the contents of the thermoplastic processing of the S21 magnesium material to the S27 thermoplastic processing process are the same as those of the S1 to S7 shown in Fig. 1, so that the description is omitted. In the present embodiment, the mask is not formed, and the resistive film 23 is formed on the entire surface of the formed sheet 2 as shown in Fig. ( (S28). The formation of the resistive film 23 is carried out in the same manner as in the first embodiment described above. Next, as shown in Fig. u, the resistive film 23 adhering to the periphery of the hole 21 of the molded piece 20 and the hole is locally removed to form the conductive portion 24 (S29). For partial removal of the resistive film 23, an organic acid such as an organic carboxylic acid or an inorganic acid or the like can be used. As the organic acid retardation, for example, monodecanoic acid, dibasic acid, acid: keto acid, aromatic carboxylic acid, or the like can be used. > ~ 丨 "And, people U day and f 〇琢 魏 Wei acid" such as oxalic acid or propylene glycol bismuth, Ye Wen search this! The acid or keto acid is, for example, lactic acid, tartaric acid, citric acid or the like. In the case of the above-mentioned aromatic carboxylic acid, for example, salicylic acid or salicylic acid, it is possible to use the above, or a mixture of two or more kinds. As the inorganic acid, for example, nitric acid, cerium, sulfuric acid, chromic acid, hydrofluoric acid or a mixed acid of 5 MPa can be used. In the present embodiment, the partial removal of the resistive film 9 ^ + p electro-deposited film 23 is chemically removed using an organic acid or a crucible & L, but also a brush, a polishing wheel, a belt, a roller, a sandblasting Wait for mechanical removal. Thereafter, the anode is emulsified at S 30 and the electrodeposition is performed at S31. 20 200823322 Finishing. The contents of the anodizing treatment and the electrodeposition coating finishing are the same as those of SI 1 and S12 described with reference to Fig. 1, and the description thereof will be omitted. In the present embodiment, as described above, the mask process (S8) in which the mask strip is attached to the molded piece or the molded piece is fixed by the pressing member, and the like is omitted, And a complicated process of removing the mask strip from the formed sheet or removing the mask from which the pressing member is removed by the formed piece (s10), and partial removal (S29) is easy because the resistive film is thin. Therefore, according to the present embodiment, the work process can be reduced and the efficiency can be improved. In the above embodiment, the magnesium soap layer is formed as a lubricating layer, but a general lubricating agent such as a grease-based lubricant or an anthrone-based inorganic lubricant may be applied instead of the magnesium soap layer. When such a general lubricant is applied: a coating process in which a lubricant is added is substituted for the formation process (S5, S25) of the magnesium hydroxide layer of the embodiment and the formation of a magnesium soap layer (S6, S26). In the above embodiment, the magnesium material is subjected to pressurization (plastic) processing. However, the present invention is not limited to these, and may be applied to a molded article obtained by hanging processing, casting processing, or forming. In the above embodiment, the plurality of molded portions are formed over the molded piece, and the electrode contact portions such as a plurality of holes are provided to sandwich the molded portions. However, (4) one molded article may be applied thereto. Peripheral setting = electrode contact of several holes, etc. In the above embodiment, the electrode contact portion formed by the hole may be formed not to be a hole, but may be, for example, a flat portion or a rib shape such as a cutting piece 21 200823322. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a flow chart for explaining a working method of the present invention. Fig. 2 is a block diagram showing an embodiment of the present invention. The workpiece of the forming section, plus Figure 3, is a cross-sectional view of the thermoplastic mode of the thermoplastic processing apparatus.

. A cross-sectional view of a workpiece machined by the thermoplastic processing apparatus. Figure 5 is a perspective view of a formed piece obtained by the thermoplastic processing apparatus. Fig. 6 is a perspective view showing the state after the mask of the formed piece. Fig. 7 is a cross-sectional view showing the state of the formed sheet before the anodizing treatment, on the line 7X-X. Fig. 9 is a flow chart for explaining the thermoplastic working method of the second embodiment of the present invention. The solid 10' shows a perspective view of the state in which the formed sheet is formed with a resistive film. Fig. 11 is a perspective view showing the state before the anodizing treatment of the formed piece. [Main 1 2 Description of the symbol of the element] Magnesium hydroxide layer Workpiece Magnesium soap layer 22 3 200823322

4 Intermittent conveyance mechanism 5 Forming processing apparatus 5 Cutting mechanism 7a, 7b Cooling mechanism 8a First molding part 8a-1 First fixed side pressurizing metal mold 8a - 2 First movable side pressurizing metal mold 8 b Second forming part 8b-1 second fixed side pressurizing metal mold 8b-2 second movable side pressurizing metal mold 8c third molded portion 8c_l third fixed side pressurizing metal mold 8c-2 third movable side pressurizing metal mold 8d fourth Forming portion 8d-1 4th fixed side pressurizing metal mold 8d-2 4th movable side pressurizing metal mold 9 Fixed disk 10 movable disk 11 Electric heater 12 Pressing member 13 Springs 14a to 14d Projections 15a to 15d Concave portion 16 Dome 23 2333232

17 18 19 20 21 22 23 24 25 Receiving part Tool part Counter Forming sheet Hole Mask strip Resistive film Conductive part Electrode needle group

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Claims (1)

200823322 X. Patent application scope: i.- The intermediate of magnesium or magnesium-based alloy has an electrode contact part around the forming part, and it is characterized by the fact that it is formed at the periphery of the forming part. There are a plurality of electrode contacts. 2. The patent application range 1 wherein the plurality of electrode contact portions are formed. The intermediate of the town or the base alloy, which is surrounded by the forming part 3. An intermediate of a town or a magnesium-based alloy as claimed in the patent scope f i, wherein a resistive film is formed on the surface of the formed portion. 4. An intermediate of a magnesium or magnesium-based alloy according to item 3 of the patent application, wherein the resistive film contains magnesium hydroxide. For example, the intermediate part of the patent range or the intermediate of the town-based alloy, wherein the forming portion is formed over the predetermined interval, and is formed at a position intermediate the forming portion and the adjacent forming portion. Forming the electrode contact 6. A method for producing an intermediate of a magnesium or magnesium-based alloy, characterized by having the following process: processing a material composed of a magnesium or magnesium-based alloy to form a contact portion having a molded portion and an electrode An intermediate; the electrode contact portion of the intermediate layer is masked by a mask member; a resistive film is formed on a surface of the masked intermediate; and an intermediate portion formed with the resistive film is subjected to electrolytic treatment; The intermediate member subjected to the electrolytic treatment removes the mask member. 25 200823322 A method for producing a body, characterized by being in the middle of a magnesium or magnesium-based alloy, having the following process: forming an intermediate having a material addition portion formed by forming a town or a magnesium-based alloy; Forming a resistive film on the surface of the intermediate; removing the resistive film of the ten-part body of the resistive film and the corresponding portion of the electrode contact portion, and contacting the electrode with the electrode contact portion from which the resistive film is removed for electrolytic treatment . 8. The method of producing a magnesium or magnesium-based alloy intermediate according to claim 6 or 7, wherein the resistive film contains magnesium hydroxide. 9. The method of producing an intermediate of a magnesium or magnesium-based alloy according to the eighth aspect of the invention, wherein the resistive film corresponding to the electrode contact portion is removed by an acid. 〃10. The method for producing an intermediate of a magnesium or magnesium-based alloy according to claim 6 or 7, wherein the forming portion is repeatedly formed in a plurality of intervals at a predetermined interval, and the forming portion and the phase are formed The electrode contact portion is formed at an intermediate position of the adjacent forming portion. U. The method of producing an intermediate body of a magnesium or magnesium-based alloy according to claim 6 or 7, wherein the electrolytic treatment is anodizing. 11. National style: as the next page. 26