High-Speed Cutting Device for Disposable Duster Fiber Separation
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Solution Overview
Problem
Current cutting technologies for consumer products like disposable dusters tend to weld or join free fiber ends of tow fibers, leading to an aesthetically unpleasing appearance and reduced cleaning effectiveness due to slow blade rotational speeds and high pressures.
Innovation Solution
A cutting apparatus with a drive shaft, drum, and cutting assembly that orbits around the axis, featuring a high-speed cutting device capable of rotating at least 1,500 revolutions per minute and a compounding gear assembly that increases the cutting device's rotational speed, along with a barrel cam and cam follower to reciprocate the cutting device, minimizing fiber end welding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If current cutting technologies are used with slow blade rotational speeds and high pressures, then cutting force is reduced, but fiber ends become welded together resulting in poor appearance and reduced cleaning effectiveness
Solution Approach 1:
The patent changes the cutting parameters by increasing blade rotational speed to at least 1,500 revolutions per minute and reducing cutting pressure. This parameter transformation allows the cutting operation to achieve both sufficient cutting force and high-quality fiber separation without welding, resolving the contradiction between cutting force and cut quality.
Solution Approach 2:
The patent employs periodic reciprocating motion of the cutting blade in addition to rotational motion. The blade reciprocates in directions substantially parallel to the longitudinal axis during each orbital rotation, creating periodic cutting actions that enhance fiber separation quality while maintaining effective cutting force through the high-speed rotational component.
2Manufacturing precision
If high-speed cutting is implemented to reduce fiber welding, then cut quality improves, but device complexity increases due to additional actuators and gear assemblies
Solution Approach 1:
The patent merges multiple functions into a single integrated cutting assembly. The cutting blade is simultaneously rotated by a dedicated actuator and reciprocated by a cam mechanism during the same orbital motion, combining high-speed rotation and reciprocating action in one unified system. This integration achieves high cut quality while managing device complexity through functional consolidation.
Solution Approach 2:
The cutting assembly serves multiple functions: the blade both rotates at high speed for primary cutting and reciprocates for fiber separation, while the orbital drum simultaneously positions and drives the cutting operation. This multi-functionality allows the system to achieve superior cut quality without proportionally increasing overall device complexity.
3Manufacturing precision
If reciprocating motion is added to the cutting device to improve fiber separation, then cut quality improves, but the mechanism complexity increases with additional actuators
Solution Approach 1:
The patent introduces a cam mechanism as an intermediary element that converts the rotational motion of the orbital drum into reciprocating motion of the cutting blade. The cam follower translates orbital rotation into parallel reciprocation during each rotation cycle, achieving improved fiber separation while managing complexity through this intermediary motion transformation mechanism.
Data Source
AI summary
The present disclosure is directed, in part, to a cutting apparatus comprising a drive shaft having a longitudinal axis, a drum configured to orbit the longitudinal axis when driven by the drive shaft, a first actuator, and a cutting assembly joined to the drum and configured to orbit the longitudinal axis with the drum. The cutting assembly comprises a second actuator operably engaged with a portion of the cutting assembly, and a cutting device driven by the second actuator. The second actuator is configured to rotate the cutting device at least 1,500 revolutions per minute during cutting of an article. The first actuator is operably engaged with a portion of the cutting assembly and is configured to reciprocate the cutting device in directions substantially parallel to the longitudinal axis as the cutting assembly orbits the longitudinal axis.