Active Puck Rotary Transfer for Absorbent Pad Orientation
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Solution Overview
Problem
Absorbent pads, comprising multiple webs and elastic members, tend to contract and distort during transfer operations in the production of disposable absorbent articles, complicating handling and control during further processing.
Innovation Solution
An active puck system that rotates and stretches articles between a pick-up and lay-down point, utilizing a cam plate with a guiding structure of increasing radius and vacuum slides to maintain control and orientation, ensuring accurate 90° rotation and stretching of absorbent pads.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If absorbent pads are transferred using conventional transfer operations, then the production process can proceed, but the pads contract and become distorted during transfer
Solution Approach 1:
The transfer roll is designed to be dynamically adjustable, allowing it to rotate at variable speeds and accommodate different pad sizes. The roll can be adjusted to match the linear speed of the web material, preventing distortion during transfer while maintaining continuous production operation
Solution Approach 2:
A intermediate transfer mechanism is introduced between the pad feeding system and the web application system. This intermediate roll acts as a buffer that receives pads in one orientation and delivers them in the required orientation, isolating the pad handling from the web tension and preventing distortion
2Ease of operation
If absorbent pads are rotated to change orientation, then proper orientation for subsequent steps is achieved, but the pads become distorted and difficult to control
Solution Approach 1:
The rotation mechanism uses dynamic speed control where the transfer roll rotates at a speed that maintains the pad's structural integrity. By controlling the rotational speed and acceleration, the pad is gently reoriented without excessive stress that would cause distortion
Solution Approach 2:
The system changes operational parameters such as transfer roll speed, rotation angle, and transfer timing to optimize pad orientation while maintaining structural integrity. These parameters are adjusted based on pad characteristics to prevent distortion during the orientation change
3Adaptability or versatility
If multiple webs and elastic members are assembled into absorbent pads, then functional requirements are met, but the pads tend to contract and distort during handling
Solution Approach 1:
The transfer roll system provides counterbalancing support to the assembled pad structure during transfer. By distributing the load and providing supportive contact points, the system counteracts the natural tendency of the elastic members and multiple webs to contract and distort during handling
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
The system effectively rotates and stretches absorbent pads, maintaining control and preventing distortion, thereby simplifying handling and processing in the production of disposable absorbent articles like diapers and sanitary pads.
Implementation Method 1
A cam plate comprising a guiding structure of increasing radius cooperates with a vacuum slide to urge stretching of the article
Data Source
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Figure 5
AI summary
An apparatus (10) for transferring articles (14) such as absorbent cores or disposable diaper by a rotary mechanism, such as a pad turner (12), to a linear mechanism, such as a conveyor (28), for further processing. A puck (16) on the apparatus is capable of manipulating (rotating and stretching) the article (14) during this transfer procedure.