3.7.2Splitting with fixed circular saws and sliding table saws

For a good result when splitting with fixed circular saws and sliding table saws, the decorative side has to be face up. The quality of the cut edges depends on the height adjustment of the saw blade, among other things. The ideal height depends on the thickness of the HPL and the circular saw blade which is used. HPL can also be cut in stacks.

1 Clean cut with approx. 10 – 15 mm projection
2 Cut with tears > 15 mm projection

The HPL has to rest on the cutting table securely and flat. It has to be held down firmly in the area of the saw blade to prevent fluttering. A pressure beam or a pressure bar should be used.

The quality of the cut edge mainly depends on:

• Quality and condition of machine and circular saw blade
• Tooth shape 
• Number of teeth
• Cutting speed
• Feed rate
   

Four types of circular saw blades are commonly used for cutting HPL, HPL- Compact and HPL composite elements:

Flat top is the simplest tooth shape which can achieve good results. Flat top is easy to use and allows economical sharpening.

Alternate top bevel is the universal tooth shape for trimming and separating cuts. The tooth configuration results in a lower power consumption of the machine. The pull cut of the alternate top bevel provides very good edge quality at the start side. Saw blades with alternate top bevel allows esay and economical sharpening.

The combination of trapezoidal and flat tooth, which can also be sharpened, is a combination where the trapezoidal tooth carries out the pre-chipping and guides the saw blade. It achieves a better cut quality than the alternate top bevel.

The combination of top tooth and hollow tooth is a combination where the high bevel tooth carries out the pre-chipping and guides the saw blade. The double-sided bevel angle resulting from the hollow grind of the hollow tooth ensures the best possible edge quality, better than the trapezoidal/flat tooth, while retaining high tool life. Proper projection of the saw blade can achieve an optimum upper and lower edge. Especially suitable for machines without scoring unit. We recommend having sharpening carried out only by certified specialist companies.