steel plate pretreatment line

Steel Plate Pretreatment line /Shot Blasting and Painting Machine

The steel pretreatment line refers to the processing process in which the steel is shot blasted to remove rust and coated with a protective primer before processing (that is, the state of the raw material).

1)Workpiece conveying system

1 Frequency conversion stepless speed regulation, each department can operate synchronously and independently

.2. The roller table is equipped with a special material wear-resistant sheath.

3. The "V"-shaped structure of the plate chain conveyor, the steel plate is in short-term contact after painting to avoid damage to the paint film.

2)Shot blasting
1. The height measurement of the workpiece adopts photoelectric switch and brake motor

2. The workpiece width measuring device automatically adjusts the opening quantity of the pill gate.

3. The cantilever centrifugal shot blasting device is adopted, and the layout of the shot blasting device is simulated by computer. The projectile avoids the roller table, and the workpiece is covered evenly.

3)Pill cleaning

Roll sweep, side sweep and high pressure blower sweep.

4)Pill recycling purification

1. Adopt full curtain winnowing separator.

2. Use special polyester core hoist transmission belt.

3. Air-controlled projectile controller is adopted.

4. Each power point of the projectile circulation system is equipped with a fault alarm function.

5)Dust removal system
The cyclone and bag integrated dust collector are selected, and the dust emission meets the national standard.

6)Spray booth

1. Two high-pressure airless paint spraying pumps, one of which is spare.

2. Standard linear guide rail is used to support the trolley, and the two ends of the trolley travel are frequency-converted and buffered.

3. The workpiece detection and transmission mechanism are separated from the spray gun, and there is no paint mist interference, which is convenient for cleaning paint dirt.

7)Drying room

1. A variety of medium heaters (or burners) can be used, hot air circulation, so that the heat can be fully utilized.

2. The temperature of the drying room is adjustable from 40 to 70 degrees.

8)Paint mist filter device and harmful gas purification device

1. Use advanced paint mist filter cotton to filter paint mist.

2. Adopting activated carbon to absorb harmful gases.

9)Electrical control system

1. PLC control, upper computer (microcomputer) dynamic simulation monitoring.

2. Circulation system failure alarm function.

3. Time accumulation and timing function for wearing parts.

technical parameters

No	Item	unit	type I	type II	type III
1	workpiece width	mm	below 2500	below 3500	below 45000
2	Model		QXY 2000 QXY 2200 QXY 2500	QXY 3000 QXY 3200 QXY 3500	QXY 3500 QXY 4000 QXY 4500
3	width of steel plate	mm	2000/2200/25000	3000/3200/3500	3500/4000/4500
4	thickness of steel plate	m/min	3-60	3-60	3-100
5	min cross section of profile steel	mm*mm	60*80	60*80
6	max cross section of profile steel	mm*mm	1000*300	1000*300
7	shortest workpiece	mm	2400	2400	2400
8	longest workpiece	mm	12000	12000	12000
9	conveying speed	m/s	1-5	0.5-4	4-6
10	rust removal grade		ISO8501-1,1988	or GB8923-88	Bsa 2.5
11	surface roughness	µm	40-70	40-70	40-70
12	film thickness	µm	15-25	15-25	15-25
13	coating type		Quick-drying zinc-rich primer	Quick-drying zinc-rich primer	Quick-drying zinc-rich primer
14	Compressed air consumption	m3/min	5-7	5-7	5-7
15	Compressed air pressure range	MPa	0.4-0.6	0.4-0.6	0.4-0.6
16	The first addition of pills	Ton	8-10	8-10	12-16

Note:

The above parameters are only applicable to our stereotyped products. When your company orders, it is necessary to obtain specific parameters according to the actual situation (such as production volume, purpose of pretreatment, etc.). For example, customers in rainy weather in the south and northeast China need preheating devices (electric heating, far infrared heating, gas, fuel oil heating and other methods), as well as drying.

Regarding the operating speed of the pretreatment line, our company can meet any requirements of users, including increasing the power of the shot blasting machine, connecting multiple shot blasting machines in series, etc.

Specific Features

According to the specific characteristics of special cleaning steel plate (steel plate width 2~5 meters, thickness 3~100mm), in order to make the cleaning effect better, especially to prevent deformation when cleaning thin steel plate, our company specially designed special pretreatment line for steel plate. Specific features are:

1. The upper and lower shot blasting devices correspond one-to-one, which offsets the impact of the projectile on the steel plate and prevents the deformation of the thin steel plate.

2. The import and export of the steel plate of the shot blasting room are specially designed to prevent the projectile from flying out of the room.

3. The side brush cleaning system is added to the cleaning device to completely remove the projectile on the upper part of the steel plate.

4. The pellet circulation system adopts a double-row hopper hoist and an overflow induction pellet sand separator.

5. For wide steel plates, use four spray guns, two on top and two on top, and spray paint at the same time.

6, the electrical system adopts OMRON temperature control components, OMRON C200HG PLC, the use of industrial control microcomputer for the upper computer dynamic simulation monitoring.

7, pill circulation system failure alarm function. If a piece of equipment (such as pellet separator, bucket elevator, screw conveyor) fails, it will automatically stop, and the equipment located on it will also automatically stop.

steel plate and quantity of shot blasting device

Width of the plate	2000	2500	3000	3500	4000	4500	5000
Quantity of the blasting wheels	4	6	6	8	8	8	10

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