Cam Drum Rotor Transmission for Disposable Wearable Article Sizing
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Solution Overview
Problem
Conventional methods for manufacturing disposable worn articles require replacing the cam drum to accommodate different sizes, making size changes cumbersome and costly.
Innovation Solution
A device with a cam drum and a rotor that includes a transmission mechanism with pulleys and belts, allowing for changing the speed ratio by swapping pulleys of different diameters to adjust the size of the worn articles without replacing the cam drum.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the cam drum is replaced to manufacture different sizes of worn articles, then the manufacturing precision and adaptability are improved, but the device complexity and loss of time increase
Solution Approach 1:
The device is segmented into modular components: the cam drum remains fixed while the rotor with pads is made interchangeable. Each rotor unit can be independently removed and replaced to accommodate different size requirements, eliminating the need to replace the entire cam drum system.
Solution Approach 2:
The cam drum is designed with universal functionality to support multiple rotor configurations. The cam drum structure remains constant while accommodating different sized rotors through standardized mounting interfaces, allowing one cam drum to serve multiple product size requirements.
2Adaptability or versatility
If the cam drum is replaced to manufacture different sizes of worn articles, then the adaptability is improved, but the device complexity and cost increase
Solution Approach 1:
The system is divided into a permanent cam drum base and interchangeable rotor modules. This segmentation allows the complex cam drum mechanism to be built once and reused, while only simpler rotor components need replacement for different sizes.
Solution Approach 2:
Instead of making the entire cam drum interchangeable, the invention inverts the approach by making the rotor (the peripheral component) interchangeable while the cam drum (the central mechanism) remains fixed. This reduces the overall system complexity.
3Adaptability or versatility
If the speed ratio is changed by swapping pulleys, then the adaptability for different sizes is improved, but the device complexity increases
Solution Approach 1:
The transmission ratio is adjusted by changing physical parameters (pulley diameters) rather than redesigning the entire transmission system. Different sized pulleys are selected based on the required output speed and torque characteristics for different product sizes.
Solution Approach 2:
The transmission mechanism is designed to be dynamically adjustable through pulley selection. The belt transmission system accommodates different pulley configurations while maintaining smooth power transmission, allowing flexible adaptation to different operational requirements.
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 the manufacturing of different sizes of disposable worn articles without replacing the cam drum, simplifying and cost-reducing the size change process.
Implementation Method 1
a mover (1S) that is guided by the cam drum (42) and reciprocates in an axial direction parallel to an axial line of the cam drum (42) by virtue of the rotation of the rotor (40)
Implementation Method 2
a first belt (1B) linked to the mover (1S); a first pulley (11) and a second pulley (12) between which the first belt (1B) is wound and which rotate together with the first belt (1B)
Data Source
Figure 1
Figure 2
Figure 3A~3B
AI summary
The present device includes a rotor that is rotated around a cam drum and includes a plurality of units, each unit including: a mover that is guided by the cam drum and reciprocates in an axial direction of the cam drum by virtue of the rotation of the rotor; a first belt linked to the mover; a first pulley and a second pulley that rotate with the first belt wound therebetween; a pad that reciprocates in the axial direction in accordance with the reciprocation of the mover, while holding a sheet piece; a second belt linked to the pad; a third pulley and a fourth pulley that rotate with the second belt wound therebetween; and a transmission mechanism that transmits the rotation of the second pulley to the third pulley and changes a rotation speed of the third pulley with respect to a rotation speed of the second pulley.