Rotating Blade Perforator for Continuous Forms
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Solution Overview
Problem
Current transversal perforating devices are not adapted to operate efficiently in systems that cut continuous forms into more than two longitudinal sections at the output velocities allowed by current technologies, limiting their ability to perform high-speed transversal perforations with varying spacing and types of perforations.
Innovation Solution
A perforating equipment comprising a first and second transversal perforating device, each with a contrast member, a rotating blade support, and a servomechanism, along with an activation group, capable of executing transversal perforations on continuous forms to be divided into two or three longitudinal sections, with the option to maintain blade movement between perforations for high-speed and flexible perforation execution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If current transversal perforating devices are used for continuous forms to be divided into more than two longitudinal sections, then the device complexity increases and adaptability decreases, but the productivity and manufacturing precision requirements cannot be met at current output velocities
Solution Approach 1:
The blade support is made rotatable about an axis parallel to the contrast roller axis, allowing dynamic repositioning of the blade relative to the contrast roller. This enables the same perforating device to adapt to different section divisions (two or three longitudinal sections) by simply rotating the blade support to different angular positions, rather than requiring multiple fixed blade configurations
Solution Approach 2:
The perforating device is designed with a universal blade support structure that can accommodate multiple blade positions and configurations. The blade support can be rotated to different angles and can hold multiple blades at different positions, allowing a single device to perform穿孔 for forms divided into two sections, three sections, or potentially other configurations, making the device multi-functional
2Adaptability or versatility
If multiple blades are mounted on the blade support for different perforation types, then the adaptability improves, but the device complexity and blade positioning control difficulty increase
Solution Approach 1:
The blade support is designed as a rotatable component that can be dynamically positioned to bring different blades into the operative position. Instead of complex independent positioning mechanisms for each blade, the system uses simple rotation of the entire blade support to select which blade engages with the contrast roller, significantly reducing control complexity
Solution Approach 2:
Multiple blades are pre-mounted on the blade support at predetermined positions and angles. The blades are arranged so that rotating the blade support to specific angular positions automatically brings the appropriate blade into alignment with the contrast roller for the desired perforation type, eliminating the need for complex real-time adjustment mechanisms
3Manufacturing precision
If the blade is stopped after each perforation, then the manufacturing precision improves, but the productivity decreases due to repeated acceleration and deceleration cycles
Solution Approach 1:
The blade is kept in continuous motion through the contrast roller without stopping between perforations. The rotatable blade support allows the blade to smoothly transition from one perforation position to the next by simply rotating to the appropriate angular position, maintaining continuous blade movement and eliminating the acceleration-deceleration cycles that would reduce productivity while preserving positioning accuracy through precise angular control
Data Source
AI summary
A perforating equipment (111) for continuous forms in movement comprises tree transversal perforating device (54, 56, 57) for executing transversal perforations on continuous forms (58) to be divided in three longitudinal sections and continuous forms to be divided in two longitudinal sections. Each perforating device includes a contrast member (61, 62, 79), a blade support mounting a blade (116a, 117a, 118a) for the three section form and a blade (116b, 117b, 118b) for the two section form, a blade servomechanism (73, 74, 85) and an activation group (104, 106, 107). The blade servomechanism rotates the blade support for a condition of interference of a blade in the position of perforation; and the activation group causes the contrast member to contrast a corresponding blade for the perforations of the forms to be divided into three sections, or the forms to be divided into two longitudinal sections.