Card-Cutting Apparatus Slitter Head Positioning
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Solution Overview
Problem
Conventional automatic card-cutting apparatuses are cumbersome and difficult to accurately position slitter heads for cutting longitudinal middle waste portions, leading to inefficiencies and inaccuracies in cutting card dimensions.
Innovation Solution
The apparatus features position-adjustable slitter heads with elastic pushing members and rotational force transmission shafts, allowing for precise cutting of longitudinal middle waste portions into belt shapes, reducing the number of slitter heads and apparatus length, and utilizing timing belts for accurate paper transfer and cutting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If multiple slitter heads are provided to cut longitudinal middle waste portions, then the cutting function is improved, but the apparatus becomes long and large in the transferring direction
Solution Approach 1:
The patent combines multiple cutting functions (side edge cutting and longitudinal middle waste portion cutting) into a single slitter head assembly. The first and second lower piece blades are mounted on the same slitter head, allowing both cutting operations to be performed at one location rather than requiring separate heads positioned at different locations along the transferring direction.
Solution Approach 2:
The patent repositions the cutting function from the transferring direction (X-axis) to the lateral direction (Y-axis) by mounting multiple piece blades on a single slitter head. This dimensional shift allows the apparatus to maintain compact length in the transferring direction while achieving multiple cutting functions through lateral arrangement of blades.
2Manufacturing precision
If slitter heads are positioned with high accuracy in lateral direction, then cutting precision is improved, but positioning difficulty increases
Solution Approach 1:
The slitter head is designed as a universal assembly that performs multiple cutting functions (side edge cutting and longitudinal middle waste portion cutting) through its multiple lower piece blades. This multi-functional design reduces the need for multiple separate positioning systems, thereby simplifying positioning while maintaining precision.
Solution Approach 2:
The patent introduces an elastic pushing member as an intermediary mechanism between the slitter head positioning system and the piece blades. This elastic member automatically adjusts and maintains the precise positioning of the piece blades, reducing the complexity of direct positioning while ensuring cutting precision through its self-adjusting elastic force.
Data Source
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AI summary
An automatic card-cutting apparatus provided with plural transfer rollers (5) to transfer paper (90), plural slitter heads (1) to cut the paper (90) in a transferring direction (X), and a lateral cutter portion (2) to cut the paper (90) in a lateral direction (Y) at right angles with the transferring direction (X) to conduct divisional cutting of the paper (90) into plural cards (C). Each of the plural slitter heads (1) is provided with a side head (1A) disposed as to be freely position-adjusted in the lateral direction to cut a side edge portion (91) of the paper (90) into belt shape, and a middle head (1B) having an upper blade (11) of disc and a pair of lower blades (12) each of which contacts each of left and right side edge portions (11d) of the upper blade (11), disposed as to be freely position-adjusted in the lateral direction to cut a longitudinal middle waste portion (92) of the paper (90) into belt shape.