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CNC Knife Pleating Machine This equipment uses upper and lower knives to complete the folding work in an alternating manner. The knife distance is automatically adjusted by a computer to meet the requirements of various folding heights, with accurate dimensions and uniform flatness. The filter paper completes the automatic dot counting, folding processing, preheating and shaping processes on the folding machine. This machine is also used for folding wire cloth and non-woven fabrics on hydraulic filters, and is suitable for multi-layer folding. (Source: https://fupeimanuf.com/)