シート切断用パターン作成方法及びこれを用いたシート切断方法

Method of making pattern for cutting sheet and method of cutting sheet in the method

Abstract

PURPOSE:To automate the making of a pattern by forming a pattern so that one layer is formed in a longitudinal direction and a stage is formed in a longitudinal direction, effecting tentering in a lateral direction according to a product, selecting a pattern based on a cut yield, and effecting updating by means of an existing pattern during a pattern wherein a yield and a work time are better than those of the existing pattern. CONSTITUTION:An allowable yield and the minimum necessary number of pieces are initially set at 11. The number of stages is decided by means of a pattern production object layer, serving as a first layer, at 12 and 13. Consecutively, based on the number of stages to be cut and the number of pieces, the number of tenters in a lateral direction is decided at 14 to decide adjustment of width. Consecutively, a lateral yield is compared with an allowable yield at 15. According to the compared result, following patterns are executed. Namely, when the lateral yield is below the allowable yield, return to width combination decision of an object layer at 14 is effected and when it exceeds the allowable yield and non- coincidence with combination of the number of tenters occurs until a preceding layer, the pattern of the layer is selected. When coincidence occurs, a return to the number of stages -l of the object layer at 16 is effected and a work is repeated. Provided the whole yield and the work time of the selected pattern are better than those of a preservation pattern, rewriting of a preservation whole pattern is effected at 21.
(57)【要約】 【目的】 短時間で自動的に、高い歩留のシート切断が 可能なシート切断用パターンの作成方法及びこれを用い たシート切断方法を提供することを目的とする。 【構成】 一定幅シートから、指定された幅の指定本数 の製品を切断して得るためのパターンを作成し、この場 合、パターンは縦方向に層を有し、各層は縦方向に段を 有し、パターンの横方向に層毎に製品の種類に応じた幅 取りをし、幅取りの区間での各段が幅取りに対応する製 品の一本を表すようにし、作成中の層のパターンによる 製品の切断歩留が許容歩留を越えるとそのパターンを選 択し、保存されたパターンより歩留が良く且つ切断に要 する作業時間が短いパターンが選択されると保存された パターンを新選択パターンで更新し、得られたパターン に基づいてシート切断装置を制御するように構成する。

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