3rd phase cuts allow the cut-to-size optimisation to cut different widths of parts within the same strip. This increases board yield but also complicats matters for the saw operator. Every part which differs from the strip width, must be recut – 3rd phase cut.
Schelling Anlagenbau has developed a new method whereby the machine operator is not tied up with additional handling, therefore production time is dramatically reduced. This process is controlled by the machine control. Additional machine components are not required.
Conventional work procedure
Until now, the operator of a cut-to-size saw had manually handle the boards or strips for every different directional cut. For a cutting pattern – as shown below – the operator first has to load the full board into the machine. This enables him to produce the two rip-cut strips and thereafter he will have to turn these for cross-cutting to get the parts required. For the top left part, the third phase cut part, the operator has to load the part back into the machine to make this third cut to achieve the required finished part size.
Time optimized work procedure
3rd phase cuts are parallel to the cuts on the rip-cut level and therefore can be processed in the same cycle. A small strip of waste between the parts allows the completion of the 3rd phase cut part, without damaging the neighbouring part. The consequence of this is that during cross cutting, the 3rd phase cut part is produced with its final measurements. This, in turn, results in reduced handling and decreased production time and eliminates any mistakes made by the operator. The required waste strip is not truely wasted, it is simply taken from the required front and end trim.
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