钣金喷塑工艺规范（Sheet metal spraying process specification） Spray operation process
I. Pendant
In the first 1. processing cabinet display pre degreasing, degreasing and phosphating temperature, coating line display cabinet to dehydration drying and curing of baking
After the temperature, the operation begins.
2. check the hanger structure is good, the conductive parts in contact with the workpiece is good, even bad contact and replace the damaged hanger.
3., check the workpiece for bumps, scratches and rust, the qualified workpiece into the upper part of the area.
4. use the cloth to clean the welding slag and dirt at the bottom of the cabinet, so as to prevent the sundries from being brought into the next process.
5., the workpiece should be done to protect the studs or parts with stud protection or adhesive tape paper protection. The outer shell of the cabinet shall be loaded with shims and protected by loading Set.
6. according to the different workpiece to be hung on choosing the right hook hanger hanger; the conveyor chain, confirm the
good suspension.
7., the workpiece should be correctly carried workpiece, pay attention to safety, ensure that the workpiece hanging position is correct and hanging reliable, to ensure the normal operation of the conveyor chain
Stationary.
8. pendants can not overlap, two lifting distance is not less than 300mm, the distance between the workpiece is not less than 50mm.
Two. Pretreatment
1., spray painting is the product after inspection qualified, semi-finished products surface coverage, rust, corrosion protection, beautiful and beautiful, and has
Function of sign. Prior to painting and spraying, pretreatment must be carried out, and necessary overall inspection shall be made before processing Trim.
Fig. 2. flow chart of pretreatment process
1) degreasing - 2) degreasing - 3) first wash - 4) second times water washing - 5) table adjustment - 6) phosphating - 7)
Third times washing - 8) fourth times washing - 9) pure water
washing
3. pretreatment process and parameters order Number
Process name, process method, treatment, liquid treatment time (SEC) Handle
temperature C
Interval length
Before Li
Liquid zone
Total leachate area after treatment
1 pre degreasing spray degreasing agent >60 50-602000400017007700
2 degreasing spray degreasing agent >60 50-60800400017006500
3 first wash spray industrial water >30 RT 800150017004000
4, second washing spray industrial water >30 RT 800150036005900
5 table adjustment spray table 40-45 RT 3600150017006800
6 phosphating spray phosphating agent 60-180 35-45800450017007000
7, third washing spray industrial water >30 RT 800150011003400
8, fourth washing spray industrial water >30 RT 700150011003300
9 pure wash spray deionized water 30 RT 700150020004200
Total 48800
Supplementary notes
Pre degreasing:
Tank volume: 3.5 cubic meters temperature: 50--60 DEG C time: no less than 60 seconds pressure: 0.1-0.2Pa
Mixing tank: add water to the working surface of 3/4. After heating to the working temperature, open the spray system. After adding chemicals, add water to
Working surface. Added per ton: 20KG, Parco, cleaner, 1523R,
degreasing agent, 2 KG, Parco, cleaner, 1523S
active agent
Control point: free base: 7--15, ML, total base / free base: less than 2.5, pre - degreasing, every additional point should be added: Parco
Cleaner, 1523R, 3.5kg, Parco, cleaner, 1523S, 0.7kg
Discharge cycle: full load running for 8 weeks.
Degrease:
Tank volume: 3.5 cubic meters temperature: 50--60 DEG C time: no less than 60 seconds pressure: 0.1-0.2Pa
Mixing tank: add water to the working surface of 3/4. After heating to the working temperature, open the spray system. After adding chemicals, add water to
Working surface. Added per ton: 20KG, Parco, cleaner, 1523R, degreasing agent, 2 KG, Parco, cleaner, 1523S
active agent
Control point: free base: 7--15, ML, total base / free base: less than 2.5, pre degreasing, every additional FC-4328A, degreasing agent 4.5
Kg, free alkalinity increased by 1 points, adjusted to the work
钣金喷塑工艺规范(Sheet metal spraying process specification)
