What does hardware bake lacquering art flow to have?

There are a lot of metals technologies to taste on market, resemble the badge that we see more, the key buckles condole act the role ofing, the technology is placed etc, not merely colourful, exterior is peculiar, the technology that make also is proper and profound, meantime cannot leave the technology of the lacquer that bake of hardware. We let understand hardware to bake the flow with lacquer detailed technique together below.
One, bottom material:
Hardware the bottom material of the lacquer that bake has
Stamping workpiece of cold rolling armor plate or plank
Stamping workpiece of galvanization armor plate or plank
Magnesium alloy stamping workpiece or plank
Aluminium alloy stamping workpiece or plank
Nevertheless technology of the lacquer that bake is widely different
2, hardware bakes paint technological process:
Pre-treatment - > . Stoving ->Priming paint besmear installs ->Roast ->Face lacquer besmear installs ->Roast ->Examine ->Pack
3, outside pretreatment:
(1) 1 remove oil; 2 bath; 3 divide rust; 4 bath; 5 watches are moved; 6 bath; 7 phosphor are changed; 8 bath; 9 bath; 10 drying;
(2) the intent of pre-treatment and principal sex:
The intent of pre-treatment is to get good coat, because the stamping workpiece of above is in,make, period of treatment move, reservation can have oil, oxide rust skin, dust, on the outer watch such as rust and corrosive, if not the function that purify will affect film directly, the exterior, place once was handled very chief position is occupied in besmear outfit technology.
(3) the meaning of pre-treatment:
Besmear is outfit pre-treatment and besmear cloth, as dry as a chip install a technology for besmear 3 big principal working procedure, meantime besmears outfit pre-treatment is bedrock working procedure, it applies exterior of life, coating to wait to all having first effect to whole coating quality, coating
The course is defatted, change the workpiece appearance after waiting for working procedure except rust, phosphor clean, even, without grease
1, remove oil:
Principal have mineral oil, grease, move, vegetable oil, for instance operation and hand of move process be of use are felt wait for grease to make the adherent force of great majority coating austere drop, what affect them is as dry as a chip, also make the hardness of coating and glossiness drop.
Get rid of with alkaline solution on workpiece smeary, principal alkaline for NaOH, naHCO3 mixes etc and become; Can buy special defatted pink, make up aqueous solution next; Time the saponification effect of Jian;
2, bath
With clear water full, the solution in before avoiding one working procedure pollutes below one working procedure. It is vivid that clear water is necessary (of the activity) .
3, divide rust
Yellow rust can be promoted corrode commodity outspread below coating, make screen sex mixes coating lose not to appear wet sex. In high temperature tall wet condition leaves the early days damage that can cause coating and metal, inattentive yellow rust, adherent force is poor, can drop together with coating.
The way that divides rust a lot of, be like lye law, acerbity fluid law, rigid standard, electrolysis, what see more is lye law. Get rid of with chemical solution the oxidation skin of workpiece appearance, rubiginous mark, it is to use normally vitriolic, useful also oxalic acid. Still but complementary with ultrasonic cleanness.
4, the watch is moved (counteract)
The abbreviation that appearance adjusts: With acid (or alkaline) solution gets rid of outside the rest is alkaline in the working procedure that divide rust (or acerbity) , adjust acid-base value to arrive as far as possible neuter, namely PH is worth =7;
The effect: Quicken phosphor to change rate, refine phosphor to change crystallization, add the crystallizing point that phosphor turns;
5, phosphor is changed
Phosphor changes the central segment that is besmear outfit pre-treatment, use manganese of phosphoric acid type, zinc, cadmium phosphatic solution handles metallic work, make form on workpiece appearance not diaphragm of dissolve sex phosphate, the phosphor that forms changes film to fasten the close construction that has fine Xiaokong, increased workpiece appearance to accumulate, can increase coating to feel an area, make phosphor is changed happen between film and coating advantageous each other are soaked, raise organic coating greatly the adherent force to workpiece.
Phosphor changes the phosphor that forms to convert film is a smooth and steady not electric separator, make metallic appearance turns into by outstanding conductor undesirable conductor, restrained small cell is formed, effectively obstruct coating is corroded.
Phosphor changes commonly used method to be high temperature phosphor to change by processing temperature cent (70~90 ℃ ) , wen Lin is changed in (50~70 ℃ ) change with normal temperature phosphor (20~30 ℃ ) .
Phosphor changes film is black normally.
6, stoving
Above pre-treatment process has in cistern at all. And each working procedure has the regulation of time. Stoving moisture, prepare lacquer;
4, on check is tasted before hanging
Going up be opposite before the line not the workpiece of lacquer undertakes the exterior is examined; Having is to already besmeared a little greatly very those who pass a surname is undesirable article, should be being examined is but direct spray or it is to want to remove old paint; Take off except old lacquer method, solvent immerses clean or with appropriative the agent that take off lacquer is taken off except.
5, burnish
Be not necessary process, get rid of outside and graininess impurity adds sure surface roughness to adhere to in order to add paint force;
The first: 400# waterproof abrasive paper
The 2nd; 800# waterproof abrasive paper or finer
6, on hang
Tick off commodity go up at hanger, hanger electric conduction moves along with automation line; Hanger should be electric system, require ground contact (install in the light of electrostatic besmear) ; Hanger normally custom-built according to the different characteristic of commodity; Amount a lot of, rectify an automation line have enough to meet need to apply
7, blow dust
Get rid of outside dust, wool bits; Compress air; Electrostatic remove dust gun; Blaze burns;
8, craft spray
Inferior to potential before active spray place (be like umbra some, sunken ministry undertake beforehand spray, but also be necessary when doing not have active spray equipment choose, power is not high, produce can finite, not smooth and steady element is much, fraction defective is taller, paint film ply is not equal
The device of craft spray is first include air compressor, be defeated tracheal, air grease segregator, spray gun, coating container, spray booth.
The breed of spray gun has: 1, gravitational type; 2, suction type; 3, pressure send form
9, Disk spray
Disk active spray is attributed to the domain of electrostatic spray, apply the tall voltage difference between spray equipment and ground connection workpiece to produce electrostatic power, the centrifugal power that Disk produces with securing rate flings paint piece, fu of the besmear after electrostatic pulverization coating go up at workpiece, next shift on Disk mask whole workpiece dimensions;
Disk spray equipment is disk type coming back actually electrostatic spray equipment, also can call device of electrostatic from mental efforts pulverization, come back dish of rotate speed for: 5 000~60 000 R/min, exercise voltage is: 70~120KV, choose air motor drive, electrostatic besmear installs the electrostatic coating that apply, the resistance of coating needs control to be inside sure dimensions;
10, filling lacquer
Examine Disk spray defect (little lacquer, lacquer is thin etc) place undertakes repairing, try to adjust through examining the defect that can discover Disk spray in time, the azimuth that is less than to Disk spray undertakes spray;
11, warm-up furnace is roast
With inferior temperature (be like 80~150 ℃ ) roast, make solvent has some of rising, wet paint film flows smooth
12, advocate furnace is roast
With higher temperature (be like 180~185 ℃ ) forcibly roast, parch paint, automation line rate is rapidder, criterion what temperature needs to move is taller;
13, taste check
Examine product;
14, next hanging pack
Take next work, pack; Enter working procedure of below one treatment or products put in storage;
　　
The liquid besmears outfit and powdery body besmear are installed
One, liquid besmear outfit:
Coating and dissolvent (or still add stiffening agent) the construction after mixing, pulverization hind flies to workpiece and adhere to in order to reduce air or static electric power, solvent rising (or each other are resonant) hind solidify becomes film; VOC (can evaporate organic gas) content is high, have to human body bigger damage; Coating is applied rate is very low, make an appointment with only 50% ; The film that spray place makes is deep for 15~25um;
　　
2, outfit of powdery body besmear:
Coating is fine pink state, adhere to through electrostatic effect at workpiece, when passing high temperature oven, coating melt, flow smooth, and cross-linking solidify; VOC content is 0, but the harm that wants advertent dust; Coating can reclaim apply, apply rate can amount to 99% above; Equipment is contributive big; Agree with the besmear outfit of thick film coating, spray film is deep for 50~150um;
3, film function (1)
Mechanical content sex: Besmear of impact strength 50Kg/cm does not have chap quite; Cupping 6.0mm above / 1mm of every second extrude; Adherent force (100 case) exam, coating is not had drop (scalar) ; Be able to bear or endure labyrinthian sex 1mm? , 180 ° are labyrinthian, coating does not have break; Pencil hardness 2H, promise subtle trace;
Chemical function: Be able to bear or endure water of jubilation of boiling water sex, 1hr immerses, without abnormality; Alkali resistance sex 5 ％ NaOH, 240hr is invariant; Acid-proof sex 3 ％ HCL, 240hr is invariant; Solvent resistance xylene, 24hr is invariant; Be able to bear or endure contamination lipstick, the 24hr below normal temperature does not have abnormality;
Hear resistance: E<0.8 of chromatism of 180 ℃ X L Hr, gloss retention is exceedingly good;
Corrosion resistance: Be able to bear or endure 1000hr of saline mist sex is invariant; Be able to bear or endure 500hr of sex of damp and hot is invariant;

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