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 in cutting accuracy and compactness.
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, and includes a timing belt system for accurate paper transfer and cutting, reducing the number of slitter heads and apparatus length.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If multiple slitter heads are provided at different positions to cut longitudinal middle waste portions, then cutting accuracy 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 positioned at the same location in the transferring direction. This is achieved by providing multiple lower piece blades and upper piece blades that can be positioned at different lateral locations, allowing the slitter head to perform both cutting operations simultaneously or sequentially without requiring multiple separate heads spaced along the transferring direction, thus reducing apparatus length while maintaining cutting accuracy.
Solution Approach 2:
The patent transitions from arranging cutting elements along the transferring direction (one dimension) to arranging them along the lateral direction at the same transferring position (another dimension). By positioning multiple lower piece blades and upper piece blades at different lateral positions within a single slitter head, the apparatus achieves multiple cutting functions without increasing length in the transferring direction, effectively using the lateral dimension to solve the spatial arrangement problem.
2Manufacturing precision
If multiple slitter heads are provided at different positions to cut longitudinal middle waste portions, then cutting accuracy is improved, but device complexity increases
Solution Approach 1:
The patent merges the functions of multiple slitter heads into a single integrated slitter head by providing multiple lower piece blades and upper piece blades within the same head structure. This single slitter head can simultaneously or sequentially perform side edge cutting and longitudinal middle waste portion cutting, reducing the total number of slitter heads required while maintaining the ability to achieve high cutting accuracy through multiple blade positions.
Solution Approach 2:
The single slitter head is designed with multi-functionality, capable of performing both side edge cutting and longitudinal middle waste portion cutting through its multiple lower and upper piece blades. This universal design allows one slitter head to replace what would traditionally require multiple specialized heads, simplifying the overall device structure while preserving cutting accuracy.
3Manufacturing 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 patent employs elastic pushing members that automatically adjust and maintain the positions of the lower piece blades and upper piece blades. These elastic pushing members provide self-adjusting positioning through their elastic properties, reducing the need for complex external positioning mechanisms and making it easier to achieve and maintain high cutting precision without excessive positioning difficulty.
Solution Approach 2:
The patent utilizes the elastic properties of the pushing members to dynamically adjust blade positions based on operational conditions. By changing the physical state (elastic deformation) of the pushing members, the system can automatically compensate for positioning variations and maintain optimal cutting precision without requiring complex measurement and adjustment mechanisms.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration enables high-accuracy cutting of longitudinal middle waste portions with a predetermined width, reducing waste and allowing for more cards to be produced from a single sheet, while making the apparatus more compact and easier to maintain.
Implementation Method 1
elastic pushing members which elastically push edges of the two lower blades respectively toward the upper blade
Implementation Method 2
rotational force transmission shafts which rotate the two lower blades; the lower blades are rotated together with the upper blade by frictional force on contact portions
Data Source
AI summary
An automatic card-cutting apparatus provided with plural transfer rollers to transfer paper, plural slitter heads to cut the paper in a transferring direction, and a lateral cutter portion to cut the paper in a lateral direction at right angles with the transferring direction to conduct divisional cutting of the paper into plural cards. Each of the plural slitter heads is provided with a side head disposed as to be freely position-adjusted in the lateral direction to cut a side edge portion of the paper into belt shape, and a middle head having an upper blade of disc and a pair of lower blades each of which contacts each of left and right side edge portions of the upper blade, disposed as to be freely position-adjusted in the lateral direction to cut a longitudinal middle waste portion of the paper into belt shape.