Cutting device for a nonwoven fabric coiler
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Solution Overview
Problem
Existing fleece winders face difficulties in detecting the position of a cutting blade due to its complex movement and require expensive electrical sensors with cumbersome battery solutions, leading to operational inefficiencies and increased costs.
Innovation Solution
A device integrated into the fleece winder featuring a stationary cutting section that can be pneumatically actuated and a sensor system for state detection, eliminating the need for electrical lines and allowing for reliable, low-cost operation with reduced risk of short circuits and mechanical wear.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a rotating cutting blade is guided along the axis of rotation of the contact roller to separate the fleece, then the fleece can be separated during winding, but the position of the cutting blade becomes difficult to detect by sensors and expensive electrical lines are required
Solution Approach 1:
The patent replaces the mechanical rotating cutting blade system with a stationary cutting section that is pneumatically actuated. The cutting section remains fixed in position and is moved only when needed to make the cut, eliminating the need for complex sensor systems to track a rotating blade and removing expensive electrical lines from rotating components.
Solution Approach 2:
The patent introduces a pneumatic actuating section that uses compressed air to move the cutting section between its stored and active positions. This pneumatic system replaces the need for electrical motors and wiring on rotating parts, simplifying the overall system while maintaining reliable fleece separation capability.
2Measurement precision
If electrical displacement sensors are used to detect the cutting blade position, then the blade position can be monitored, but expensive electrical lines have to be routed from the outside to the sensor
Solution Approach 1:
The patent eliminates the need for electrical displacement sensors on rotating components by using a stationary cutting section actuated by pneumatic means. The sensor can be positioned statically and connected via simple pneumatic or electrical lines without requiring complex routing to rotating parts.
Solution Approach 2:
The patent introduces a pneumatic intermediary system that acts as a mediator between the control system and the cutting section. This pneumatic system transmits the actuation signal without requiring direct electrical connections to moving parts, simplifying the overall connection architecture.
3Ease of manufacture
If contactless transmitting sensors with battery solutions are used, then electrical lines can be omitted, but handling becomes worse due to battery changes or recharging
Solution Approach 1:
The patent uses a pneumatic actuating system that can be continuously supplied through fixed pneumatic lines without requiring batteries or recharging. This eliminates the maintenance issues associated with battery-powered sensors while still achieving contactless or minimal-contact operation.
Solution Approach 2:
The patent creates a universal pneumatic supply system that serves both the actuation of the cutting section and potentially other functions in the fleece winder. This multi-functional pneumatic infrastructure eliminates the need for separate battery systems while providing continuous, maintenance-free operation.
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
Enables efficient and reliable fleece separation during winding, reducing operational risks and costs by using a pneumatic system for actuation and sensor communication, ensuring safe and efficient transfer of the fleece between winding shafts.
Implementation Method 1
The sensor system can also be designed pneumatically, which means that electrical supply lines can also be omitted here
Implementation Method 2
The actuating section is configured to move the cutting section between the first and a second state
Data Source
Figure 1
Figure 2a~2b
Figure 3~4
AI summary
A device can be integrated into a fleece winder (1), so that the fleece can be separated with the device. A cutting section (106) of the separating section (100) extends across the width of the fleece and is driven in a stationary or oscillating manner with respect to the axis of rotation of the contact roller (8) around which a holding section (130, 140) of the device is arranged so as to be rotatable. An operating section (102, 104, 105) can accommodate the cutting section (106) in the holding section (130, 140) so that the cutting section (106) does not come into contact with the fleece. The section (102, 104, 105) can move the cutting section (106) transversely to the axis of rotation of the device so that the cutting section (106) is urged against the web for severing. A sensor system (160) of the device serves to detect the presence of at least one of these two states of the separating section (100). A fleece winder (1) with a device can wind fleece onto a winding shaft with a contact roller (8) and a pressure element. The pressure element presses the winding shaft against the contact roller (8) in order to wind fleece around part of the circumference of the contact roller (8) onto the winding shaft. The winder can separate the web using the device and monitor the position of the cutting section (106). An operating method for the web winder (1) comprises winding (S2) the web around the winding shaft, detecting (S3) a cutting condition if it exists, separating (S6) the web, detecting when the cutting section is urged against the web and in that case the conveying (S7) of the partial web in the direction of another winding shaft.