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MACHINERY

MANUAL DOUBLE LINE

VST wall elements are manufactured on the manual double line.

At the heart of the manual double line is the universal saw with automatic feed system and vacuum manipulator. The saw is positioned in the center of both production lines and cuts the cement-bonded particles boards to the necessary size. Openings (e.g. for windows or doors) are also cut out.

After the cuts are made, the specially developed steel spacer profiles are screwed ontothe particle boards in the screwing station. The spacer profiles are fastened in place by galvanized countersunk screws without the screws penetrating the surface of the elements from the inside. This preserves the ready-to-paint surface of the VST elements.

After the spacer profiles have been screwed in place, the elements arrive in the press. The reinforcement meshes are installed before the pressing procedure. In addition, the empty electrical pipework (incl. electrical sockets) as well as the heating and sanitary pipework are installed in the elements. After all the components have been installed, the two element halves are pressed against each other, with the spacer profiles being permanently connected to each other by means of a click system.

The reinforcement mats are installed before the pressing process. In addition, the electrical drain piping (including electrical outlets) as well as the heating and sanitary piping can be installed inside the elements. After all components have been implemented, the particle boards are pressed together, whereby the spacer profiles are firmly connected to each other by a click system.

AUTOMATED PRODUCTION LINE

The cement-bonded particles boards with a standard size of 3.35 x 1.25 are picked up by the handling robot and placed on the conveyor system. The boards are fed automatically through an edge processing machine, where the groove and tongue are milled on both long edges of the board as it passes through, after which glue is applied. The individual boards are pulled together and pressed to form an “infinite” board.

After the standard board elements have been pressed, the “infinite” board is immediately cut to the required length of the wall element. The boards are individually cut to size with a water jet saw.

Two screwing robots with grabbing and placing devices especially suited for the spacers simultaneously screw the spacer profiles onto the boards. The screwing robots are automatically supplied with the spacer profiles and the screws.

The boards with the spacer profiles screwed in place are positioned vertically and fitted with all components (reinforcement, empty pipework, sanitary and heating pipework, etc.). The two halves of the wall are then pressed together.

The finished walls are guided by a ceiling crane into the finishing station, where the final inspection and any necessary rework is carried out.

The automated production line is controlled by specially developed software. The plans for the elements to be produced are first created with a BIM- based planning program. Next, they are sent to the manufacturing plant’s controlling computer, which automatically manufactures the elements on the auto-mated line according to the plan specifications.

SLAB AND SPECIAL ELEMENT PRODUCTION

Slabs are produced by first cutting the cement-bonded particle boards to the necessary size with a universal beam saw. The hat profiles are screwed onto the cement-bonded particle board from above with galvanized countersunk screws at 40 cm distance without the screws penetrating the surface of the elements from the inside. In addition to the VST slabs, the VST columns and beams are produced in this station.

VST METAL FABRICATION

All spacers, steel components and reinforcement elements required for production and transport are manufactured or machined in the VST metal fabrication. The VST plant requires only the necessary raw material for production, such as rolled steel and reinforcing steel. The punching machine produces the spacer profiles from slotted strip material, whereby different punching heads enable the production of different sizes of spacer. This allows the thickness of the VST walls to vary as required to suit the static requirements. The bending machine processes the rolled steel that is needed for the corner reinforcements and the shear heads.