Counter-rotating Roller Cutting Device for Sanitary Laminar Elements
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current cutting and application devices for laminar elements in sanitary product production require frequent format changes and use of different equipment for varying product lengths, leading to increased costs and downtime due to the need for hard-metal inserts and complex componentry.
Innovation Solution
A cutting device with counter-rotating rollers and a vacuum-assisted counter-blade system that allows for precise cutting and application of laminar elements to length, enabling synchronization with the web flow without the need for hard-metal inserts and minimizing component parts, allowing for 'pitchless' operation and reduced format changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional cutting devices with hard-metal inserts and complex componentry are used, then cutting precision can be maintained, but device complexity increases and downtime increases due to frequent format changes
Solution Approach 1:
The patent removes hard-metal inserts from the cutting system, extracting the problematic component that required frequent replacement during format changes. The counter-blade operates without these inserts, eliminating the associated downtime and complexity while maintaining cutting precision through the vacuum-assisted system.
Solution Approach 2:
The cutting device is designed to handle multiple product formats using the same basic components. The counter-blade with vacuum holes can accommodate different laminar element lengths by adjusting the web feed rate and cutting position, eliminating the need for specialized components for each format and reducing overall device complexity.
2Adaptability or versatility
If frequent format changes are implemented to accommodate different product lengths, then adaptability improves, but productivity decreases due to increased downtime
Solution Approach 1:
The system employs dynamic adjustment capabilities where the web feed rate and cutting position can be varied to accommodate different product formats. The vacuum-assisted counter-blade system dynamically adapts to different laminar element lengths without requiring physical component changes, enabling quick format switches with minimal downtime and maintaining high productivity.
3Measurement precision
If vacuum-assisted counter-blade system is used, then synchronization with web flow improves, but device complexity increases
Solution Approach 1:
The patent employs a vacuum system through the counter-blade to precisely position and hold the laminar element during cutting. The vacuum holes create controlled suction that synchronizes the cutting action with the web flow, achieving precise positioning without requiring complex mechanical synchronization mechanisms, thus limiting the increase in device complexity.
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 solution simplifies the cutting and application process, reduces downtime, and extends the device's working life by enabling efficient cutting and application of laminar elements to length without the need for frequent format changes or hard-metal inserts, ensuring precise positioning and synchronization with the web flow.
Implementation Method 1
a vacuum-assisted counter-blade system that allows for precise cutting and application of laminar elements to length
Data Source
AI summary
A device for forming laminar elements (F') of predetermined length via the cutting to length of a laminar material (F) comprises: - a first rotary element (3), to receive wound thereon the laminar material (F) and carrying at least one orbiting cutting edge (5) that is able to act on the laminar material; and - a second rotary element (4) having a skirt surface that defines with respect to the first rotary element (3) a gap of passage for the laminar material (F); the aforesaid skirt surface to interact with the cutting edge (5) with the interposition of the laminar material (F) to carry out cutting to length of the laminar material (F) itself and thus forming the aforesaid laminar elements (F'). The first rotary element (3) and the second rotary element (4) can be controlled in rotation in opposite directions independently of one another.