Steel Plate Pretreatment Line

Steel Plate Pretreatment Line

1. Description of Steel Plate Pretreatment Line

The steel plate pretreatment line consists of feeding and blanking roller，shot blast system, dust removing system, testing roller, automatic paint-spraying system, drying system, as well as electrical control system (including a workpiece detector). It is applied to remove the rust, scale and contamination on the steel surface, so as to make the surface clean, bright but with a certain coarseness, by which the paint film can attach to the steel surface more firmly, hence the surface quality and the anti-corrosion capacity of products are improved. The primer (inorganic zinc silicate) automatically pre-painted after shot-blasting, can prevent the steel from being secondarily contaminated and rusted during operation in the workshop. And, the surfaces of the products are clean, unrusted, uncontaminated for final painting.
This line, with a total length of 54m, designed and manufactured on the base of advanced experience native and abroad, has been furnished with a variety of properties, such as high technology, ideal structure, long duration, easy handling and maintenance and high efficiency.
In the electric central controlling room are installed a TV touch screen, a TV monitor, whereby the operations can be controlled intuitively and the failures are observable. Meanwhile, through the TV monitor, the feeding and blanking statuses along the pretreatment line also are in view.
In case there should be some urgencies and the machine should be stopped in no time, buttons of EMERGENCY STOP are installed at the upper blanking roller, shot blast chamber and paint sprayer in the general control room.

2. Steel Plate Pretreatment Line Technical Parameters

(1) Processable workpiece:
Specification of processable steel plate
Thickness:                                            6~40mm
Width:                                             ≤3000mm
Length:                                        2000~15000mm
Specification of processable profiled bar
Length:                                           3000~15000mm
Maximum section dimension of profiled bar: Width * Height        1500×300mm
(2) Speed:
Transportation speed of roller belt             V=0.8~3.5m/min
Processing speed
When processing steel plate: (steel plate in class B)      V=0.8~3.0m/min
When processing profiled bar: (profiled bar in class B)       V=0.8~2.0m/min
(3) Quality criterion:
The cleanness of steel plate surface should conform to GB8923-88 (Steel plate in class B) Level Sa2.5
Roughness of steel surface should conform to GB1031-83:       Ra40~70μm
Thickness of paint film (dry):                              15~25μm
(4) Environment protection criterion:
Equipment’s noise should conform to GBJ87-85              ≤95dB
Density of powder and dust emission: The emission density at the exit after air purifying should conform to GBJ4-73:   ≤80mg/m3

Name	Unit	Technical Data
Max loading of conveying rollers	t/m	1.5
Delivery speed	m/min	0.5~5
Working speed for steel plate	m/min	0.5~2.5
Working speed for steel profile	m/min	0.5~1.5
Annual output	t	50000 (250 working days, 8 hours / shift)
Surface quality		Sa2.5 GB8923-88
Paint film Thickness	μm	15~25
Temperature in drying chamber	℃	40-70
Compressed air consumption	cbm/h	6
	Mpa	0.4~0.8
Dust Emission density	mg/cbm	80
Noise of whole equipment	dB	≤85
Power of whole line	kw	About 395

The technical parameter is optional, we can accommodate your requirements, please don’t hesitate to contact us!

3. Steel Plate Pretreatment Line General drawing