Tetramatic is a new quadruple-bladed saw for cutting to size composite materials in books of 220 mm and of up to 310 mm upon request. Large production increases & labor-savings bring profits.

Commercial production of the new Tetramatic panel saw cut-to-size unit began in 1999 at the Giben International S.p.A. factory in Pianoro (BO), Italy. First models are already going into operation. Giben calls it their "first innovation for the Third Millennium." Under pending patent, it is described as a panel saw in the range of the supplier's high-capacity angular systems and cutting lines. Its job is to cut books of 220 mm. in height and of up to 310 mm. upon request.

The key feature is that two main saw blades, instead of the usual single blade, share the cutting strain while at the same time the cutting speed can be doubled. The top blade fits in the channel guide which has been set by the bottom blade. The bottom saw is recommended to be a diamond blade, while the one on top is tungsten.

The allied important feature is the use of two scoring saws, one of which is located over the book of panels and the other under the book. The objects of the scoring saws are to ensure a high-quality cut through the whole book including the top panel and to increase overall the main blade cutting life. A book of panels is sawed in the same manner as if it were two separate books.




 

 



Advantages of Tetramatic system



  • Importance of smaller saw kerf
    Tetramatic employs a saw blade with a kerf of 4.4-mm vs. conventional kerfs ranging between 6-7.5 mm. Giben claims the smaller kerf is more rigid, is under less strain and experiences fewer vibrations. Savings occur with the smaller motors used and through cheaper, longer-lasting blades.

  • Benefits to sawn panel users
    Because the dimensions for resultant boards which are to be edgebanded are of high precision, the edgebander need remove only a small amount to achieve an excellent adhesive surface. Resulting higher yields of raw material are achieved due to the thinner blades and the precision, chip-free surface quality.

    Giben points out that board producers now recognize that book panel saws can go through the above-described transition and thus reach the necessary output.

    CTS panels are now considered by certain larger operators to be a commodity and in the big new mills, space is being left for eventual CTS or for integrating the saw into the line to be able to meet market requirements.

  • Controls and commands
    The whole system is commanded by PC employing HMI - Human Machine Interface (same as MMI, Man Machine Interface). The PC simulates in real time and to scale the cutting task showing all parts of the system and checking all factors, zone by zone, in virtual reality (e.g., if there is a board out of position). It will stop if the machine doesn't reach its target, with accompanying alarm. The screen will show if the problem is manmade or machine-made. A crash will show in advance, with a general alarm.
    With the number of commodity board sizes growing, the computer has to be able to handle that newer, heavier load. Should a failure occur, an important feature is the restart from any interrupted position. The operator has pictorial diagnostic of the system, which means fewer words and numbers on his screen. If there is an error somewhere in the cutting plan, the operator sees the information displayed on the screen. If there are no physical impediments, the operator looks for an electronic reason.