Fiber Processing Alignment Unit for Edge Formation
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Solution Overview
Problem
Current fiber processing devices face challenges in achieving precise edge formation for three-dimensional molded parts, leading to inaccurately formed edges and increased processing complexity, resulting in additional processing steps and waste production.
Innovation Solution
A fiber processing device with an interchangeable tool and alignment unit featuring adjustable outlet openings for medium dispensing, allowing targeted fiber positioning and edge formation, which adapts to different tool configurations and geometries, ensuring all fibers are brought onto forming surfaces for defined edge design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a spray bar with nozzles is used to displace fibers, then fibers can be rinsed away from outside the shaping surfaces, but the entire surface cannot be effectively sprayed and edge formation remains inaccurate
Solution Approach 1:
The spray bar is segmented into multiple independently controllable nozzle groups, allowing selective activation of specific nozzle sections. This enables targeted spraying of only the necessary surface areas (such as edge regions) rather than requiring the entire surface to be sprayed, thereby improving edge formation accuracy while reducing system complexity and resource consumption.
Solution Approach 2:
Different nozzle groups are configured with different spray characteristics (angle, pressure, flow rate) suited for specific local requirements. Edge region nozzles are optimized for precise fiber displacement, while other areas use standard spraying. This local optimization achieves accurate edge formation without requiring complex adjustments across the entire spray system.
2Manufacturing precision
If the spray bar is displaced to cover the entire surface, then more fibers can be rinsed away, but processing time increases and productivity decreases
Solution Approach 1:
The spray bar operates with periodic motion patterns, activating nozzle groups in sequence rather than continuously across the entire surface. This periodic activation maintains effective fiber displacement where needed while significantly reducing the total processing time, thereby improving productivity without sacrificing fiber positioning accuracy.
Solution Approach 2:
The system performs preliminary positioning of fibers using the alignment unit before the main forming process. This preliminary action ensures that fibers are correctly positioned in advance, reducing the need for extensive spraying and rinsing operations during the main process, thus maintaining accuracy while improving overall production speed.
3Manufacturing precision
If multiple processing steps are used for edge formation, then edge accuracy can be improved, but the number of processing steps increases and waste is generated
Solution Approach 1:
The alignment unit with selectively activatable nozzle groups is merged with the forming station, allowing fiber displacement and positioning to be integrated into the main forming process. This combination eliminates the need for separate post-processing steps for edge formation, achieving high edge definition quality while reducing the total number of processing steps and minimizing waste from additional operations.
Solution Approach 2:
The system uses the same suction and spray mechanisms already present in the forming station to achieve edge formation, rather than requiring separate dedicated equipment. The suction tool and alignment unit work together in a self-service manner to position and define edges during the normal forming operation, reducing device complexity and eliminating waste from additional processing steps.
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 solution reduces processing steps, minimizes waste, and achieves clear edge formation without post-processing, enabling efficient production of various molded part geometries with improved resource utilization.
Implementation Method 1
The alignment unit has a plurality of outlet openings for a medium, wherein the alignment unit can be supplied with a medium which can be dispensed via the outlet openings for displacing and supporting the positioning of fibers on the surface of a tool
Implementation Method 2
the suction tool is at least partially immersed in the pulp with at least one suction cavity whose geometry essentially corresponds to the product to be manufactured. During the immersion, suction takes place via openings in the suction cavity
Implementation Method 3
In the hot press tool, the preforms are pressed in a cavity under heat input, with residual moisture being removed by the pressure and heat
Implementation Method 4
a lower tool half and an upper tool half which are heated. In the hot press tool, the preforms are pressed in a cavity under heat input
Implementation Method 5
The spray bar includes a plurality of nozzles which are arranged at regular intervals. After the suction of pulp via the suction tool, this tool is moved in the direction of the spray bar. Then water is output via the nozzles, which impinges on the surface of the suction tool
Data Source
AI summary
A fiber processing device and a method for operating a fiber processing device are described, wherein the fiber processing device has at least one forming station with an exchangeable tool and an alignment unit which has a plurality of outlet openings for a medium, wherein a medium for displacing and positioning fibers on the surface of a tool is dispensed via the outlet openings in determinable time periods, wherein different tools can be received in the forming station in order to produce different three-dimensional molded parts, wherein a tool received in the forming station is exchanged for another tool, and the outlet openings of at least one alignment unit are changed in accordance with the received tool and its configuration.