阳极氧化工艺流程翻译

Process flow and raw materials of aluminum and aluminum alloy anodic oxidation tinting Procedure specification on aluminum and aluminum alloy anodic oxidation tinting 1.Procedure specification(line drawing)

Substrate→Mounted hanging→Degreasing→Alkalineetching→Neutralization→Anodic oxidation→Electrolytic coloring→Sealing→Electrophoretic coating→Curing→Unloading packaging→Warehousing

2. Mounted hanging:

2.1 preparationsbefore mounted hanging.

2.1.1 Check theconductive partslike conductive beams and bars. They should be regularly polished, cleaned or repaired.

2.1.2 Get ready conductivity of aluminum and aluminum wire.

2.1.3 Check the pneumatic tools and related equipment.

2.1.4Check whetheror not requirements likelength, count, color, thicknesson the flow paper or production task list are consistent with the order drawingand actual materials.

2.1.5Depending on the specifications (size of circumscribed circle, external surface area, etc.) to determine the count and space. To control the pigment spacingabout 1.2 times thanthe horizontal width of the material shaped,and the white materialspacingabout 1 time than the width.

2.1.6Choose the appropriate rack, and ensurethat hooknumber of negative and positive hangersis the same with the count of materials shaped.

2.2 Mounted hanging:

2.2.1 When hanging, fix the topside one first, and then the bottom one, and then arrangethe remaining sections in the middle, and tighten the screws.

2.2.2Before hanging, placing one aluminum sheet between the materialand aluminum screw p so that it can prevent poor conductivity impactingoxidation, coloringand electrophoresis.

2.2.3 When hanging, itis not allowed to hang all the materials in the lower or upper rack.

2.2.4 The hanged materials shouldrecline more than 14 degrees in order to facilitate air exhausting in electrophoresis or coloring,and reduce the air bubbles.

2.2.5When hanging,considering the facingof the decorative surface and groove to prevent the color shading, bubbles, pitting appearing in the decorative surface.

2.2.6Like someflexible and easily deformedmaterials, put one more rack or aluminum wire in the middle to prevent friction between the materials or touching tank plate, and that may abrade or burnthe surface.

2.2.7 When selectingvice-bar rack, the plug rod is preferred. When using aluminum banding, they must be evenly spaced, and the outcrops should be less than 25mm.

2.2.8Materials with great disparityof cross-section size andshape are prohibited to hang in the same row.

2.2.9When hanging and handling equipment, you must wear clean gloves,gently andwell

protecting the surface.

2.2.10 Whenhanging or handling equipment, workers should strengthen self-examination and cross-examination, the failure materials are non-mounted, and take appropriate measures to deal with the surface stained with oil or aluminum burrs

2.2.11After eliminating unqualified ones, you must make them up in time by order.

2.2.12In hanging area,materials should not be stored for too long time, to prevent corrosion of the surface.

2.2.13Fillingthe hanging record and oxidation process card. Accurately calculating and fill in oxidation of each linked area,checkingmodels, countand colorby orders at any time.

2.2.14Do a good job in shift procedures and keep the work area clean.

3. Preparation before oxidized production units:

3.1 Checking the level of the liquid in the process tank.According to test report card, to adjust the concentration of the bath solutionand ensure that bath solution is always in line with technical requirements. Workers should frequently sweep the dirt from thebath solution.

3.2 Checking the vehicle, freezer, rectifiers, circulating acid pump, water pump, transfer cars, furnace and other equipment, any exception should be immediately solved.

3.3 Check PH (or conductivity)and cleanliness in the pure water washing tank and running water washing tank. If it does not meet the technical requirements, workersshould changeit and hydrating overflow.

3.4 Open the alkaline etching, hot pure water tank, sealing the steam or cooling water tank; open the oxidation tank, coloring tank and cooling system ofelectrophoresis tank to ensure the uniformity of bathsolution and temperatureplying with requirements.

3.5 Check the Roots blowers, exhaustblowers and exhaust fans.Before the production, they should be opened.

3.6 Carefully check the oxidation process card, specifically confirmthe production requirements, and prepare the color palette.

4.General requirements for oxidation sets operation:

4.1 It is not allowed to hang t more than twohangingsevery time. Andkeeping a certain distance between the two hangings to prevent collision between the materials.

4.2 Whenmaterials hung into and hung out of the bathsolution, they must be inclined to 30°.

4.3 Materialsfalling into the tank must be removed promptly and hung up in rafts, the damage ones must be promptly notified to group-to-order equipment to make them up.

4.4 In addition to alkaline etching and coloring, the sections should be hung out after the bath solution drained away to reduce the flow of waste and pollution.

4.5 When the hanging materials must cross other sections, the transferringones must maintain the level of the degree to reduce the flow of liquid and pollute materials and conductive beam.

4.6 Each process should be promptly fill in the oxidation process cards, and sign them.

5.Degreasing:

5.1 Process Parameters

position of bath solution: acidic degreasing agent 2 to 3%

Temperature: room temperature

Degreasingtime: 1 ~ 3min

5.2 Operating requirements:

5.2.1Check process card, make production requirements clear. Materials with the same color, same model and same order or similar specification should be suspended into the degreasing tanksimultaneously or preferentially,so that it can facilitatethe operation the post-procedure.

5.2.2When the degreasing is finished, the materials should be hung out of the tank, preventing the sand from the surface.

5.2.3 After degreasing, the surface should bewell-distributed and wet, and the materials should be washed by Level 2 water then turned into the alkaline etching process.

6. Alkaline etching:

6.1 Process parameters:

position of bath solution: plain-surface alkaline etching,sand-surface alkaline etching

NaOH: 40 ~ 50g / l 45 ~ 60g / l

Additives (NaOH): 1 / 12 ~ 1 / 15 1 / 6 1 / 8

Temperature: 40 ~ 45 ℃45 ~ 55 ℃

Alkaline etching time: 1 ~ 3min 10 ~ 30min

6.2 Operating requirements:

6.2.1When alkaline etching, the forced draught blowers and exhaust fans should be opened.

6.2.2When alkaline etching is finished, materials should be hung out as soon as possible, finishing shedding immediately and transferring to the tank washing, so that it can prevent straying marking from the surface.

6.2.3Strictly control alkaline etching process parameters, to ensureuniform quality of the surface after alkaline etching.

6.2.4 Post-alkaline-etching materials must be washed by Level 2 overflow. The remaining alkalineliquid should be fully cleared away, so that theraffinate can’t pollute other tanks.

7.Neutralization:

7.1 Process parameters:

position of bath solution: HNO3: 120 ~ 150g / l

Tank temperature: room temperature

Neutralizing time: 2 ~ 5min

7.2 Operating requirements:

7.2.1. Whenneutralizing, the materials should be moved up and down and anti-tilt, fullyneutralizingexhaust liquorin the hole and remove appearingdust.

7.2.2 Post-neutralizing materials must be washed by Level 2 overflow, and turn to the anodizing tank.

7.2.3 The surface quality inspection should be strengthened to check the surface of the sand surface conditions, mottling, burrs, welding lines and other surface defects, for timely processing, reworking.

7.2.4 Regularly check screws are loose or not, to ensure good electrical conductivity.

8. Anodic oxidation:

8.1 process parameters:

Tank position: H2SO4:150 ~ 180 g/l AL ion: 5 to 15 g/l

Tank temperature: 20 ±1 oC

Oxidation voltage: 14 and 18 V

Current density: 130 ~ 150 A / ㎡

The oxidized time: according to requirements film thickness calculation.

8.2 Operating requirements:

8.2.1 Anodic oxidation must be open before:

(a) Rectifier cooling water.

(b) Bath circulation cooling system (cooling unit).

(c) Send the exhaust fan.

8.2.2 Anodic oxidation must be checked in advance: conductive copper conducting copper aluminum piece, hanging fixture and conductive beam in contact, and the situation of the conductive, should be often burnished.

8.2.3 Anodic oxidation must be opened before a conductive copper cooling water, check and conductive beam bending, whether the conductive bending beam must be replaced, in case of burn out the conductive and impacts anodic oxidation.

8.2.4 Before electricity oxidation, profile must be placed in middle of oxidation tank, ensure that with both side distances are the same.

8.2.5 Before electricity oxidation link up, driving hook must be taken off conductive beam hook, when the power and oxidation end, driving hook can hang conductive beam hook, in order to avoid short circuit, damage the equipment.

8.2.6 Anodic oxidation set the current density, oxidation method should accord to the oxidation area of profiles multiplied with the current density. Shading materials for the current density of oxidation must be controlled in 130 A / ㎡.

8.2.7 When Anodic oxidation, should often visited the voltage, current, temperature, etc. Various kinds of instrument, any abnormal should be promptly eliminated.

8.2.8 After Oxidation of profiles, should detect the film thickness, and make records, if film thickness can not reach the requirements, must be to prolong the oxidized time to film thickness to meet requirements.

9, Electrolytic coloring:

9.1 process parameters:

Bronze is golden brown department

Bath position: SnSO4: seven to 10 g/l GD: 35 to 45 g/l

NiSO4 ? 6 H2O: 20 ~ 30 g/l SeO2:8 ~ 10 g/l

Additives: Same amount with SnSO4 CuSO4:2 ~ 3.5 g/l

H2SO4:15 ~ 20 g/l 12 to 17 g/l

PH: 0.6 ~ 1.0 PH: 0.7 ~ 1.025 ℃

temperature: 15 ~ 20 ~ 25 ℃

V oltage: 14 to 18 V 14 to 16 V

Shading time: 20 S ~ 15 min 2 ~ 6 min

9.2 Operating requirements:

9.2.1 Maintain bigger slope when putting anodic oxidated profiles into color cell, and placed at the

middle of poles, ensure equal polar distances.

9.2.2 When shading, driving hook must be taken off conductive beam hook, and rest for 0.5 ~ 1 minutes to color.

9.2.3 Shading voltage for the same kinds of color must be equal.

9.2.4 When bronze cell shading over, must be lifted immediately as soon as possible, flow bath, transfer to sink quickly, fully clean the acid water in the hole of profiles, use coloring board to pare, when color is too light, put it into coloring tank to electricity plementary color, when color is too deep, put it into coloring tank (no electricity) or acidic water behind of oxidation tank to fade (bronze series).

9.2.5 Because golden not fade, and shading time should not be too long.

9.2.6 The shaded profiles shall be washed adequately by level 2 water, then go on electrophoresis or hole sealing.

10, Sealing:

10.1 Process parameters:

Bath position: Ni ion: 0.8 ~ 1.2 g/l, F ion: 0.35 ~ 0.6 g/l, PH: 5.6 ~ 6.5, pure dampening solution temperature: 20 ~ 30 ℃

Hole sealing time: oxidation film thickness (um) x 1.2 min around (subject to quality standards).

10.2 Operating requirements:

10.2.1 Profiles should be washed by pure water before sealing, in case the pollution of electrophoresis and sealing slots.

10.2.2 When profiles enter into sealing slots, should prevent hole sealing water from splashing into electrophoresis recycling tank.

10.2.3 Hole sealed profile after must be dried after being washed.

10.2.4 Sealed profile should be strictly prohibited to contact with oil, electrolyte and bare hands.

10.2.5 After sealing, should sport check the hole sealing quality, timely adjust hole sealing time, ensure that hole sealing quality to achieve the requirements, and prevent the over-sealing powder.

11, electrophoresis

11.1 process parameters:

Tank position:

Solids: 5 ~ 8%

Solvent: 1 ~ 5%

Conductivity: 550 ~ 900μS/cm

PH: 7.6 ~ 8.0

Electrophoresis V oltage: 90 ~ 120V

Temperature: 23 ±3 ℃

Electrophoresis time: 1 ~ 2min

11.2 operating requirements:

11.2.1Before electrophoresis, the onesmust be gone throughone pure water, two hot water, threecold water washing, fully washing the acidic water and dirt in the material surface, hole and film hole.

11.2.2 Always check PH, conductivity and cleanliness in the three water, keeping PH> 5.5 in the water tank, the first pure water conductivity <120μS/cm, the second and the third water

conductivity <60μS / cm, and often change the water.

11.2.3Temperature of hot pure water tank should be controlled between 60 ~ 80 ℃.

11.2.4 Articles in hot water tank's time between 3 ~ 5min, after the hot water wash, should be fully dried and fully wiped to get conductive beam rid of oil and acid-base water. Keep special attention oncleaning and cooling of thick-walled tubular.

11.2.5Temperature ofCold pure water washing tank should be maintained below 30 ℃. Articles that are washed in cold water should not be dried, preventing extrawave when electrophoresis. 11.2.6Maintain the largest tilt when profiles are in the electrophoresis tank to facilitate the exclusion of air.

11.2.7 After put into the electrophoresis tank, articles should be placed in the central electrode, and ensure equal distance on both sides of the plate, and stand for one minute before electrophoresis.

11.2.8When electrophoresis, circulating pump and electrophoresis recycling equipmentmust be turned on. The two pure water tanks should meet the following technical requirements:

The firstpure water,thesecond one

Solids: <1.0% <0.3%

PH: 8.0 ~ 8.3 8.0 ~ 8.5

Conductivity: <100μS/cm <50μS/cm

11.2.9Electrophoresissolutionshould openrefined purification system at fixed periodas for the increase of PH and conductivity to ensure the electrophoresis bath meet process requirements. 11.2.10 After electrophoresis, articlesmust be passed by two pure water.

11.2.11Post-electrophoresis articles should be placed in the pre-dried area.

11.2.12keep electrophoresis area clean, non-oil, no dust, no acid mist to pollute profiles and electrophoresis tank.

12, Curing:

12.1 process parameters:

Curing temperature: 180 ~ 200 ℃Curing time: 30 ~ 45min

12.2 operating requirements:

12.2.1Before curing, check oven and curing temperature measurement system, and regularly clean the curing oven.

12.2.2Whenfinished curing and cooled to room temperature, workers check the quality of the electrophoresisfilm.

13, unloading, packaging

13.1 Preparation for discharge

13.1.1 Check the storage rack, transport trolley, film machine, packaging machine

13.1.2Checkthe model, length, count, color on the card are consistent with thematerial object or not. Make packaging requirementsclear; prepare protective film, tape, wrapping paper and other packaging materials.

13.1.3Test oxidation thickness, posite thickness, sealing quality, the film hardness, film adhesion, color, color variation, appearance quality. All of them adhere to requirements, then they can be discharged, and fill oxidation product inspection records.

13.2 unloading, packaging

13.2.1Water sealing materialis not allowed to unload with water, electrophoresis materials must be