- Model NO.: LVGB-4MHA
- Condition: New
- Customized: Customized
- Power Source: Electric
- Product Type: Gypsum Board
- Booker: No Waste Edges
- Workers: 12 to 14 Per Shift
- Installation and Commissioning: 105 Days
- Mixer and Forming Machine: No Need Worker
- Final Production: Meet Europe Standard
- Specification: CE, SGS, BV
- HS Code: 8474809010
- Certification: CE, ISO, BV
- Screw Design: Single-Screw
- Application: Gypsum
- Automatic Grade: Automatic
- Heating System: Direct Heat
- Board Length: 1800 to 3660mm
- Machines Area: 115 X 18m
- Special Service: Help You to Operate It and Train
- Board Weight: 6.15kg/M2 (9mm)
- Trademark: LVJOE MACHINERY
- Origin: Shijiazhuang, Hebei Province
Raw materials consumption (1200 x 2400 x 9.5mm)
per sq.m. (kg/m2)
One photo of gypsum powder feeding and metering (belt conveyor)
|Plasterboard plant labor|
|Compressed air system||1|
|Central control room||1|
After metering, gypsum powder, modified starch, water and others are put into screw mixer, where they are mixed. Then the mixture is continuously sent to the vertical mixer.
Foaming agent metered and stored in the tank. When use, it and water are filled into foaming generator. As compressed air vent in, foam is generated steadily, delivered into the vertical mixer too.
2. electrical control system
1.7 Electrical parts
Workshop use cables or wires connecting to bus, which supplies power for workshop. Power supplied to control cabinet is supplied by workshop power distribution cabinet or low voltage switch of transformer. Some electric generating devices are also needed to be set in workshop for overhaul of power system.
1.7.1 Main controlling system
Controlling systems of the plant consists of pulp preparing and forming control, cut off control, wet plate delivery control, dryer control, product treatment control and computer station control and etc. For electric system, the controlling system consists 4 parts: pulp and forming station, wet plate delivery control, dry station and product treatment station. Computer station is optional, which is used to monitor production line.
184.108.40.206.Control system of dosing & forming section
This system controls all the equipment in this section.
Control devices consist of 1C1 forming control cabinet, 1C2 processed material control cabinet, 1A1 push-button switch box , 1A2 push-button switch box, and other push-button boxes.
1C1 cabinet is the key component, which including the following hardware: PLC main station, operator's terminal working station, frequency conversion and etc. Operator set specifications of pulp making and gypsum board forming by input data to terminal working station. From the terminal working station, you can check the working status of this terminal and the other related working stations, working specifications, and dynamic situation of working flow.
There are some controlling cabinets that go with or being a part of some equipment, which is also belong to the controlling system of this section, including: 1C3 belt weighing controlling cabinet, small feeding material control cabinet, upper and lower wrong positioning adjusting controlling cabinet, dust filter controlling cabinet and other on site electric device, such as feeding material storage measuring and etc.
The equipment of this section includes powder weighting and pulp preparing system, pulp preparing, edge adhesive system, foaming system, gypsum board forming and paper uncoiler and etc.
(1) Dosing section
Gypsum powder, modified starch, accelerator, retard, and etc are measured and sent to composite screw conveyor to be put into vertical mixer.
Foaming agent sent to storage and later to be sent to foaming device with water and compressed air. After foam is generated, it is sent to vertical mixer.
(2) Forming section
The glue is delivered at glue tank at the sides of forming table. After coated with glue, face paper and bottom paper are delivered to paper stands by hoist. Bottom paper goes through paper stretching, creasing, and positioning devices until be sent to the forming table, where the mixture of all the raw materials and water in the vertical mixer is conveyed on the surface of bottom paper. Face paper, on the other hand, also goes through stretching, creasing, and positioning, and is delivered to the forming table too. Followed by vibrating, creasing of back paper, covering face paper and extrusion, the gypsum board formed, then to be conveyed by the belt for setting.
Then the gypsum board goes through belt conveyor for setting until transfer roller conveyor, which is a machine only for further setting. The speed of transfer roller conveyor should be same with belt conveyor, which controlled by adjusting frequency motors. At the same time, roller conveyor has cutting-off sensor. Belt conveyor and roller transfer has emergency cut-off.
The variable frequency driver devices equipped with belt conveyor, roller conveyor, accelerate conveyor. According to preset speed.
System is local controlling type, means each equipment has separately starter and stopping devices. Each motor has its own start/stop button box. For bucket lifter, besides start/stop button, it also has emergency cutoff button.
220.127.116.11 cutting-off controlling system
after setting, the cutting-off machine cut wet gypsum board continuously in a preset length according to the design. Length accuracy of cutting is ≤±2mm.
Servo-control is adopted for this system. Servo-controlled motor drive cutting-off machine at preset length and speed.
18.104.22.168 Wet gypsum board handling control
This system controls all the equipment in this section.
Accelerate roller conveyor is made up of several independent roller conveyors, which has 2 options of speed. Before cutting off, accelerate roller convey is in low speed, which is in the same pace with roller conveyor. After board has been cut off, motor runs in high speed, until board is carried away from conveyor, the speed is back to low speed.
As the operator finds unqualified products, he can push on button to remove bad board. The gearing devices are controlled by photo-electric. The movement of gypsum board is described as bellow:
As the head of gypsum board group reaches the preset place at the end of roller conveyor, the motor for feeding stops. The gypsum board then be inverted and conveyed out of by transverse conveyor.
As the gypsum board reaches invert place, electric-magnet clutch invert the gypsum board. Then the electric-magnet clutch stops, the transverse conveyor starts to send gypsum board to the preset place.
As the second gypsum board group is inverted, transverse belt conveyor starts again and sent out two groups of gypsum board from roller conveyor together. When they reach exit, transverse belt stops working, at the same time, the exit roller conveyor lift up, and then exit roller conveyor send gypsum boards to the moving roller conveyor. As gypsum boards are out of roller conveyor, roller conveyor comes down and motor for exit roller conveyor stops working.
The moving roller conveyor receives two groups of gypsum boards from 1# transverse conveyor, and position them to be dried through tipple conveyor.
22.214.171.124 control system of dryer
The dryer consists of feeding-in section, closed section, feeding-out section, and ventilation section and etc. Feeding-in section is made up of 6-layer slope roller conveyor. When gypsum board is sent to terminal roller conveyor in each layer, sensor at this layer sends signal to accelerate motor to stop, in this case, roller conveyor moves at the same pace with closing section of roller conveyor, which sends gypsum board to the closed section.
Closed section has 2 parts, each parts has exhale and inhale, which sprays heated wet air and inhales exhausted air of dryer. Between exhale and inhale, ventilation devices and sprays are installed and adjusting valves are installed to adjust temperature differences.
After drying, gypsum board enters into 6-decks feeding out section, which is equipped with signal sending-out device and pneumatic baffle.
A main transmission station is installed by the side of feeding out section, which supply power to 6-layer roller conveyors.
Feeding out machine receives dried gypsum board and send them to conveyors, where they are carried to the next step. The gypsum board is cooling down during this process.
126.96.36.199 controlling station of terminal section
2# transverse consists of vertical roller conveyor, horizontal conveyor and baffle.
Gypsum board enters lifted roller conveyor and photo-electric switch switches on, the roller conveyor speeds up running. At the time gypsum board reaches at a preset distance to baffle, roller conveyor changes speed from high speed to low speed. In this case, gypsum board moved slowly to the baffle and stop in front of baffle. If storage conveyor is ready and indicator of scrap release is off, the lifted roller conveyor then goes down and gypsum board is down to the belt. At baffle lifts, belt conveyor starts to carry gypsum board to transverse station. When gypsum board reaches the end of belt conveyor, belt conveyor stops, baffle goes down and roller conveyor lifts up. Baffle can be move along roller conveyor, so it can be placed in accordance with length of gypsum board. When working, pneumatic stopping device prevents baffle.
Face to face machine consists of belt conveyor and folding parts. If there is only one gypsum board, the sensor tells belt conveyor to carry it away. When it has two gypsum board on the belt, the folding part will work to put them together and then be sent to the next process.
When gypsum board is received to this equipment, the positioning device will position gypsum board for cutting. It has two sets of saw, pre-cut saw and main saw. After two steps of cutting, the scraps is crushed and be sent to dust filter.
To cut gypsum board at different length, just adjust width of it by adjust the movement of arms driven by frequency conversion motor.
Edge treatment and trimming are mounted at 2 sides of cutting-off machine, which has two sets respectively, say fixed set and moving set. It consists of paper out, wetting, stretch and cutting. Paper is carried out by the moving gypsum board. Edge treatment and trimming shall work at the same pace.
After trimming, gypsum board is sent to flat belt conveyor. When 1# stacking is in use, the gypsum board is sent by two belt conveyor (I) into stack 1#. When it is full, 2# stack is put into use. Gypsum board carried by belt (I), and transverse roller put into use, as well as belt (II). The positioning device in use too.
Electric cabinets consists of controlling cabinets, operation station, push on button switch box. PLC and electric control devices are installed in the cabinets. Operation station has various buttons and indicators, which can be used by operator for controlling.
3. drying section
Gypsum boards are sent to 6 drying decks through tipple conveyor. Dryer adopts hot air (gas) oven for drying, which enables gypsum board to be dried by hot air. Finally the free water evaporated, and water content less than 1%.