Plasterboard (also called drywall, wallboard, and gypsum board) is a building material consisting of gypsum formed into a flat sheet and sandwiched between two stiff lining paper. It comes in several types and sizes and is the most common material globally for the construction of interior walls and ceilings, which is ideal for timber framed buildings, loft conversions, stud-partitions and ceilings. 

It is typically found in 1.2m (4 feet) wide sheets of various lengths, commonly 2.4m (8 feet), 3m (10 feet), or 3.6m (12 feet). The board thickness ranges from 8mm to 25mm. It is gray surfaced for plastering, or ivory faced, which can be painted or decorated directly. 

We are one supplier of dedicated industrial solutions and provide Turnkey equipment packages in the field of building material industry.  

EED strongly focuses on the development of "Plasterboard production", offers "Industrial Total Solutions" to all requirements of technical expertise services, and quality complete plant at all stages from concept to commissioning.

We have the technical expertise to provide full turnkey equipment packages and all the engineering services required for the "Plasterboard production" with annual capacity from 2 to 50 million square meter. 

The plasterboards to be produced by our plant equipment confirm to China National Standard of GB/T9775-88 and other international standards, such as ISO6308-1980, DIN or ASTM. 

Main Raw Materials

• Building Gypsum Plaster (Plaster of Paris, CaSO₄.1/2H₂O, building grade) 

• Cardboard (Facing paper, 220-260g/m²) 
• Modified starch
• Foaming agent
• Other additives, if required.
  

Brief Description of Production Process

1.  Dosing Station

The powdered materials (such as stucco plaster, modified starch, accelerator) will be weighed, mixed in one screw conveyor, and then fed into a pin mixer.

The waste paper and water will be prepared to pulp of required consistency in the hydropulper. The pulp will be fed into a storage tank via a pulp pump, and then fed to the pin mixer.

Foam, formed from foaming agent will be directed into the pin mixer.

During the production, the liquid materials like pulp, foam and water will be fed into the pin mixer by metering pump.

Glue is prepared for cardboard edge gluing.

2. Forming

The forming system consists of paper handling system, pin mixer and forming machine, etc.

The paper handling system incorporates web loading and unwinding device, paper splicing, tensioning and edge scoring. Cardboard rolls can be mounted on the cardboard feed equipment using a lifting system. Splicing and edge scoring is also one standard option.

A gypsum slurry which is made up from stucco, or plaster of Paris, water and other additives in the pin mixer, spreads onto a moving sheet of paper in a uniform stream, from multiple outlet hoses of pin mixer. As the board is actually produced upside down, this paper will form the ‘front face’ of the plasterboard. The ‘back face’ paper, fed from above the production line, is applied to the slurry via a forming head set to the desired board thickness.

Forming Station	Pin Mixer

3. Hardening

Once formed, the board travels the length of the production line on a series of setting belts and sections of rollers. During this journey, the plaster core has time to set or harden so as to increase strength. The related product information (including: product name and type, relevant Standards, date and time of manufacture) is printed on the back of the boards via an ink jet printer.

Hardening & Cutting	Cutter

4. Cutting and wet end transferring

After being hardened, at the shear, the long train of board is cut into panels of specific length. These smaller boards are transferred at 90 degrees to cross conveyor by acceleration conveyor. The turning machine is installed at the middle of cross conveyor, and turns over the board 180 degrees, thus the front face of plasterboard will be up, so as to avoid scratch during transportation by rollers. Then, the boards are conducted into a multi-level dryer through a distributor.

The rejected board is transferred by one belt conveyor.

Cutter & Distributor		Turner & Cross Conveyor

5. Drying

During the drying period, the excess water, which was required to form the initial slurry, is gently evaporated off under certain temperature and moisture.

Roller conveyors are installed in the dryer.

Several options are available to customize the dryers according to your process needs and investment budget:

• 2 or multiple zones
• 6 to 12 desks
• Inner width of dryer as necessary for 2 board streams up to 2880mm
• Natural Gas or Light oil heating system
• Steam or Thermal oil heating system
• Heat recovery system
• Exhaust energy optimization system

Dryer - Open Side		Driven Sprocket

Dryer - Close Section		Close Door of Dryer

6. Trimming and stacking of finished plasterboards

After the boards have dried, they are taken off from dryer for trimming and stacking to form pallets. These pallets are then placed in the warehouse by forklift. Board booker (boards is paired face up or booked face to face for protection purpose) is one optional item depending on customer's requirement.