Digital Printing Film Winding Structure Without Humidity-Prone Sensors
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Solution Overview
Problem
Existing film winding structures in digital printing machines are prone to issues with tension sensors malfunctioning due to high humidity, leading to loose or tight film rolls and crumpling, affecting overall film quality.
Innovation Solution
A digital printing film winding structure with a rotatable bracket, adjustment device, and roller traction part that adjusts the winding speed of the winding shaft through friction, replacing the need for a tension sensor, and incorporating a damping mechanism to balance pressure and ensure uniform winding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a tension sensor is used to control winding speed, then winding quality can be maintained, but the sensor is easily damaged or malfunctions in high humidity environments
Solution Approach 1:
The patent removes the tension sensor from the system entirely and replaces it with a sensorless control mechanism. The friction-driven roller traction part directly couples the winding shaft to the drive mechanism, eliminating the need for separate sensing components that are vulnerable to humidity damage.
Solution Approach 2:
The system uses the film itself and the friction interaction between the roller and winding shaft to automatically regulate winding tension and speed. The friction coupling creates a self-adjusting mechanism where the winding process itself provides the control feedback, without requiring external sensors.
2Ease of operation
If motor speed is kept constant during winding, then control is simple, but winding tension increases as master roll diameter increases
Solution Approach 1:
The patent transitions from constant speed control to dynamic speed adjustment. The roller traction mechanism automatically adapts the winding speed based on the master roll diameter, creating a dynamic control system that maintains optimal tension throughout the winding process without complex control algorithms.
Solution Approach 2:
The friction coupling between the roller and winding shaft creates a natural feedback mechanism. As the master roll diameter changes, the friction interaction automatically adjusts the torque transmission, providing inherent feedback control that regulates winding tension without requiring separate sensing and control systems.
3Device complexity
If friction-based speed adjustment is used, then tension sensor is eliminated, but winding speed control precision may be reduced
Solution Approach 1:
The patent replaces electronic sensor-based control with a pure mechanical friction coupling system. The roller traction mechanism uses friction physics to directly couple the drive mechanism to the winding shaft, eliminating electronic components while maintaining control through mechanical interaction.
Solution Approach 2:
The system controls winding parameters by changing the friction interaction characteristics. By adjusting roller pressure, surface properties, or rotational speed, the system can precisely control winding tension and speed through friction parameter modification rather than electronic control.
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
Maintains consistent winding speed and tension, preventing loose or tight film rolls and ensuring high-quality winding, even in humid environments, by using the adjustment device and damping mechanism to stabilize the winding process.
Implementation Method 1
the roller of the roller traction part drives the winding shaft to rotate through friction with the winding shaft, to cause the winding shaft to automatically adjust a rotation speed
Implementation Method 2
the extensible part is arranged on the bracket on one side of the roller traction part, and drives the paper pressing roller to compress a film on the winding shaft
Implementation Method 3
the damping mechanism is configured to balance a pressure of the roller traction part on the film on the winding shaft
Data Source
AI summary
A digital printing film winding structure is provided, and belongs to the technical field of film winding in digital printing. A rotatable bracket is arranged on a machine body of a digital printing machine. One end of the bracket is connected to the machine body. An adjustment device is arranged at an other end of the bracket. Then, a roller traction part of the adjustment device is rotatably arranged on the other end of the bracket. A roller of the roller traction part abuts against a winding shaft. As the film is wound, a diameter of a master roll increases, which can reduce the rotation speed of the winding shaft, so as to solve the problem that a tension sensor is easily damaged or easily malfunctions when used in a place with high humidity.