TW524857B - Surface treatment of magnesium alloy - Google Patents

Abstract

A surface treatment of magnesium alloy is characterized in that not only remove the rust, corrosion and smut on the surface of magnesium alloy, but also clean the pinholes over the object surfaces of injection molded or casting molded magnesium alloy workpiece. The treatment method may enhance the adhesion for the subsequent process (electro-plating, electro-coating, spray coating and baked coating). It also completely eliminates the environmental pollution caused by the traditional chemical process, because the sandblasted objects can be used directly for electro-plating, electro-coating, spray coating or baked coating without chemical pretreatment or conversion.

Description

524857 V. Description of the invention (1) [Forming or pressing of the lock alloy of the invention to which the invention belongs [the past technology is suitable for the lightest and lightest of the previous two] The electromagnetic density of excellent density cannot be reduced in recent years. In addition to the system, there have been more requests for requests in recent years. However, the manufacturing materials such as easily recyclable goods caused by tree pollution, especially in the field of rigidity required, + magnesium alloy parts and home appliances are a kind of magnesium alloy workpiece shape and molding JL # technique] 11th century "industry Because of the 1.84mg / m2 wave-blocking materials, gold is widely used, because the electromagnetic shielding of the town, due to the higher the portability of the computer, the fat material is an environmental issue. Use, so electricity If the material is light and thin, the surface treatment method of gold with the most widely used material, which is the most popular product, can be completed by wet blasting machines, regardless of size, specifications, materials, and injection. Alloy "? Because 丨〉. Because it can be used for computer alloys in addition to thin and thin meat, mobile power is gradually adopted, it is generally more difficult to return. In contrast to this, brain and mobile fat materials are shortened and small, and the general purpose is welcomed. Especially the new driving force of materials, but also the magnesium alloy is a practical alloy with high quality and high vibration attenuation and high speed products based on recycling, especially the attention paid by general operators, especially mobile phones and automobile parts. And recycling characteristics. Words, car parts and home appliances _ σ ν ι Clothing mouth, for the lightweight materials resin materials or lightweight metal materials for recycling materials, yes, light metal materials _ ^ Phone, Automotive Department ⑤ and home appliances' are lightweight materials such as magnesium and aluminum. In the trend, there is still metal :: metal +, among which the density is the most for computers and mobile phones, and the required wall thickness is less than 1.5mm.

Page 4 524857 V. Description of the invention (2), ideally less than 1.2mm as a laptop, mobile phone, digital camera, camera, digital camera, walkman, LCD projector, Mp3, etc. Physically, it is the most suitable lightweight metal material. According to A, in the past, in the manufacturing process of magnesium alloys, after the workpiece is mechanically processed, it is treated with a coating or film. The purpose is to make the surface resistant to oxidation. (Baking) lacquer treatment. But this difficulty] transport: Qi! Degreasing and soaking with acid and alkali, which can easily cause pollution during the manufacturing process, and occupational injuries to operators, and also cause environmental pollution due to various types of liquid emissions. [Summary of the invention] The present invention is based on the fact that the traditional magnesium alloy system II is very harmful to environmental protection. The disk blasting machine that created this town alloy can be divided into two types: wet type: f type blasting V machine. Species, but because the magnesium alloy is a highly activated powder, it is extremely easy to deer the dry sand blasting machine produced by the rapid impact of sand, magnesium, x, violent and burning, this activation property is still not industrially possible. T Property L, but when the magnesium alloy in the wet sand blasting machine's sand material rapidly impacts A, the generated magnesium powder comes into contact with water to produce rapid and fine oxidation (generating gas ballast), which will be lost with the water cycle. In addition to solving the problem of magnesium people +, real estate protection function. In addition to the difficult surface processing of gold, it also has a ring: ^ t ί μ 1 乂 The magnesium alloy forming (injection molding or die-casting molding) is processed by traditional processing after its formation, and its disadvantages are: Page 5 524857

Grinding of CNC grinder: Jia Shifan, Shi, Shi Yuezhuo masters, Magnesium powder finished by the sister π L + Ding Xun talents and the danger of dust explosion and burning of chip locks 3, dry blasting machine: equipment cost is cheap, falling = set difficult. At that time, another inspection and law will be conducted by Pang Yi, but it will be difficult to collect because of the danger of dust storms and burning of magnesium powder or magnesium. 3. Manual renovation: only the area is clean, and the magnesium is clean. It cannot be used for large hazards, nor can it be applied to burrs and small areas. Repairing and dust cutting and dust explosion and combustion. In view of the use of magnesium alloys in the application category, not only can it successfully complete the safety concerns and high environmental pollution of magnesium alloys, etc. The process of asking for money alloy can reach a cheaper process, which is characterized by: It is more and more extensive, and the demand for traditional processing of square parts has caused industrial problems. Wet sand blasting machine is used for fast, safe, non-polluting, sanding materials that use natural objects, mainly resin sand, silicon carbide, alumina glass sand. 2. When the magnesium alloy is in the solid state, it is no different from general metals, but the magnesium powder is extremely susceptible to dust explosion and combustion. Therefore, the magnesium powder is mixed into water to produce magnesium oxide, and it is discharged with water circulation. Because magnesium oxide is a natural material, Therefore, no environmental pollution occurs after discharge. ^ 3 Use very fine-grained sand to impact the workpiece, so the surface is uniform and there is no dead angle during processing. 4. After the surface processing, the workpiece can be directly electroplated, electro-painted, brightly treated, and generally sprayed with <baked> paint. 5. After the surface processing, the workpiece can also be directly converted into a film and treated with a film. 6. Fishing blasting machine can also be used for degradation treatment and film treatment.

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(, When the wet sand blasting machine is operating,… ,, is performed under the water, the water mixing is in an enclosed room, and 8, the air pollution is not generated during the operation of the wet sand blasting machine. And emissions It can be used in a circulatory way for recirculation through the fixed pressure, f. The discharge amount is fixed, and the water inlet control can be accurately and effectively controlled. 10 11 First, the surface of the wet sand blasting machine can be oxidized. Electroplating, electrocoating, and wet blasting can also effectively simplify the production process. A certain proportion of the sand material of the above wet blasting machine is poured down and passed into the high pressure side from the side to achieve surface injection or die-casting. After that, the work of the air wet blasting machine of the wet blasting machine uses natural sand and glass sand as the main work. Water ingress / grain anti-oxidant to prevent surface spraying after baking blasting. Function, it can be set directly or by direct pressure to remove the defects generated in the process of tree> lacquer and other processes. Production cost. ^ 'It adopts the sand-water mixing method = combined, and sends it to the sand-water by the submerged water pump. Generate high pressure and impact ', which is characterized by: sand blasting treatment followed by sand blasting treatment. It is supplied by air compressor. 疋 is air pressure 1 ~ 5kg / cm2. Moon stone emery, alumina, 6, sand and water mixed The proportion is sand material: water = 2 5%: 7 5 γ [Embodiment of the invention] ° The surface treatment method of the present invention is applicable to the production process of the alloy.

524857

The following figures are used to explain the present invention in detail based on the examples and comparative examples: Example 1: Using Mg-9A1-〇 · 5Zη—0.3 as a magnesium alloy, using a wet blasting machine and the traditional process Compared with the manufacturing process, the processing flow is simplified. As shown in Figure 1, it is a flow chart of the surface treatment of a traditional magnesium alloy. As shown in Figure 2, it is a flow chart of the surface treatment of the magnesium alloy of the present invention. From the comparison between Figures 1 and 2, it can be seen that the working process of the present invention using a wet blasting machine is much simplified compared with the traditional process and can save man-hours. Example 2 ... Using a Mg-9A1-〇 · 5Zη-〇 · 3Μη-type magnesium alloy, treated with a wet sand blasting machine, the pressure was set to 2kg / cm, and # 200 silicon carbide was used.

For the workpiece <A4 size (21 Omm X 297mm), thickness 2mm> directly processed after injection molding 'sand water mixing ratio is sand material: water = 25%: 75%, as shown in Figure 2' is traditional magnesium Comparison chart of the pros and cons of the operability, flow, and sand hole volume of the alloy process and the sand blasting process of the present invention. From the comparison of the second figure, it can be known that the working process of the present invention using a wet sand blasting machine is simpler and simpler than the traditional process, and there is no generation of sand holes and defects.

Example 3: Using Mg-9A, 0 · 5Zη-〇 · 3Μη-series magnesium alloy, processing with a wet blasting machine, the pressure is set to 2kg / c m2, using # 200 diamond, on the workpiece <A4 size (210mmx 297mm ), Thickness u ·〉 directly processed after injection molding 'sand-water mixing ratio is sand material · · water = 25%: 75%, as shown in Figure 4' is a traditional chemical alloy process and the blasting process of the present invention Comparison chart of advantages and disadvantages of processing, film processing, coating, and electroplating. From the comparison of the fourth figure, it is clear that the present invention adopts a wet blasting machine.

524857 V. Description of the invention (6) The working process does not require chemical treatment and film treatment, and can be painted and electroplated during the process. Example 4: Using M g-9 A1-0 · 5 Zn η-0 · 3 Μ η series rhenium alloy, treated with a blasting machine, Ai type sandblasting machine, the pressure is set to 2kg / c m2, using # 200 silicon carbide, in Workpiece <A4 size (210mm x 297mm), thickness 1 · 2ηπη> is injected directly after treatment, and the sand-water mixing ratio is sand material: water = 25%: 75%, 2 Test after general coating and plating As shown in Figure 5, it is a comparison chart of the advantages and disadvantages of the 100 grid test, adhesion test, gold test, hardness test, and grip strength test of the alloy process and the sand blasting process of the present invention. Nose system 1, 100 grid test ... Use a 100 grid knife to draw a hundred grid, and test with a transparent tape 4 to check the number of peeled grids. * Person 2. Adhesion test · Apply transparent tape and peel off the coating at 90 °. &amp; repair f ′ 3, Pencil hardness test: The pencil tip is pushed forward at a 45-degree angle at 500g. Clothing surface 'about 4. Claw grip strength test: the surface of nail claw is about 20mm>. H. Scoop 2 ~ 3 times (compared with Figure 5 in the drawing, it is clear that the invention adopts the Cheng Cheng Yi Baige test and the adhesion test and the traditional process: the fall of 3 sanders, but the hardness test of the wrong pen For: ί: All control systems have slight control, danger, and exhibits that are not as good as your r &amp; I scratches, and their claw grasping strength is helmet # 桄 传 [industrial use possibility] spoon Thermal traces. Surface treatment of gold, regardless of magnesium alloy

Page 9 According to the present invention, everyone 524857 V. Description of the invention (7) The shape, size, specifications and materials of the workpiece, whether it is injection molding or die casting, can be completed by wet blasting machines. Page 10 1 ^ 524857 Brief description of the drawings The first picture: the surface treatment flow chart of the traditional magnesium alloy. The second figure is a surface treatment flow chart of the magnesium alloy of the present invention. The third figure is a comparison chart of the advantages and disadvantages of the operability, flow and sand hole volume of the traditional magnesium alloy process and the sand blasting process of the present invention. The fourth figure is a comparison chart of the advantages and disadvantages of the chemical treatment, film treatment, coating, and plating of the traditional magnesium alloy process and the sand blasting process of the present invention.

Fifth figure: The comparison chart of the advantages and disadvantages of the 100-grid test, adhesion test, pencil hardness test, and claw-grip strength test of the traditional magnesium alloy process and the sand blasting process of the present invention.

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Claims (1)

52485 7 &gt; \ jLjL ^ —- p y v ΦPlease talk about the toilet 1. Clean any shape and ruler of a magnesium alloy, regardless of the surface (1) · After the alloy is formed (2) · The pressure source is air pressure (3) · The glass sand using natural objects, etc. ; (4) • Sandblasting on a surface of a samarium alloy (1) • After magnesium (2) • Pressing (3) • Making glass (4) • Table 3, One (1) • Magnesium shape, ruler No matter whether it is used for the surface alloy mechanical processing, the general room force source is natural sand for air pressure, etc .; The surface blasting treatment of the shape and size of the seed town alloy, and whether it is used for this surface alloy The molding surface treatment method is used for wet sand blasting machine to remove sand holes on the surface of magnesium alloys with dimensions, specifications, and materials, and is a magnesium alloy product that is injection or die-casting. It is characterized by: Can be sandblasted; machine supply, working pressure is set to 1 ~ 5kg / cm2; sand materials, such as resin sand, emery, alumina, glass 70%, can be directly coated or electroplated. The surface treatment method is used for wet sand blasting machine to remove the sand holes on the surface of the magnesium alloy with dimensions, specifications and materials, and the magnesium alloy products formed by injection or die-casting can be treated. Its characteristics are: industrial (car, washing , Drilling, planing, grinding, tapping) can be applied with sandblasting after the temperature is completed; machine supply, working pressure is set to 5kg / cm; sand materials such as resin sand, gold steel sand, oxidized metal, and glass are completed, Can be directly painted or plated. Surface treatment methods are used for wet sand blasting machines to remove sand holes on the surface of magnesium alloys of t, specifications, and materials, and for magnesium alloy products that are injection molded or die-cast. They are characterized by the following characteristics: After repairing to general room 524857 The working pressure is set to 1 ~ 5kg / cm2; such as resin sand, corundum, alumina, and glass temperature can be sandblasted (2) · The pressure source is supplied by the air compressor (3) · Natural sand materials, Glass sand, etc .; can be directly coated or plated. The method is used for wet sand blasting machine to remove sand holes on the surface of magnesium alloy and die-cast magnesium alloy products. It is characterized by: (4) After the surface blasting treatment is completed, 4. a magnesium The surface treatment of the alloy can be cleaned in any shape, size and specifications, and is either injection or suitable for this surface treatment method (1) The anti-oxidation film produced by chemical formation and film treatment can also be removed by sandblasting after anti-linking. (2) · The pressure source is supplied by the air compressor, and the working pressure is set to bu; (3) · Sand materials using natural objects, such as Resin sand, corundum, aluminum, glass sand, etc .; (4) · After the surface blasting treatment is completed, it can be directly coated or electroplated. 5. A magnesium alloy surface treatment method, which is used for wet type sand machine to remove sand holes and clean the surface of the alloy in any shape, size, specification and material, and whether it is injection or die-casting magnesium alloy products, Both are applicable to this surface treatment method and are characterized by: (1). For defective products of magnesium alloy after painting or electroplating, sandblasting and decoating can be applied at normal room temperature; (2) · The pressure source is supplied by the air compressor and the working pressure is set to; (3) ). Use natural sand materials, such as resin sand, corundum sand, oxide sand, glass sand, etc .; Page 13 524857 6. Scope of patent application (4). After the surface blasting treatment is completed, it can be directly coated or electroplated. Page 14 III !!