Pneumatic Wrapping Sheet Support for High-Speed Packaging
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Solution Overview
Problem
Existing packaging machines face challenges in maintaining accurate positioning and preventing creases of thin wrapping sheets at high production speeds, leading to potential defects in packaged products.
Innovation Solution
The method involves arranging a wrapping sheet on a plane without physical support, positioning a group of products in front of it, and moving them together orthogonally to wrap the sheet around the products, with mechanical support members assisting the flaps to prevent skewing and creases, allowing for high-speed packaging without compromising quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of substance
If the wrapping sheet is made thinner to reduce material usage and cost, then material consumption decreases, but positioning accuracy and crease prevention deteriorate at high speeds
Solution Approach 1:
Air cushions act as an intermediary between the wrapping sheet and physical contact surfaces, providing support and control without mechanical contact. This allows thin wrapping sheets to be handled at high speeds without direct mechanical interference that would cause positioning errors or creases, while still enabling effective control of the sheet during the packaging process
Solution Approach 2:
The patent employs pneumatic devices (air cushions) to support and control the wrapping sheet during the packaging operation. The air cushions provide a non-contact support mechanism that maintains sheet stability and positioning accuracy even when the sheet is made thinner, thus resolving the contradiction between material reduction and manufacturing precision
2Productivity
If the production speed is increased to improve productivity, then output increases, but wrapping sheet positioning accuracy and crease prevention deteriorate
Solution Approach 1:
Air cushions serve as a mediator that enables high-speed operation without compromising positioning accuracy. The pneumatic support system responds dynamically to motion, maintaining sheet stability during rapid packaging cycles without the inertial issues associated with mechanical contact systems
Solution Approach 2:
The patent replaces traditional mechanical contact-based support and control systems with a pneumatic field-based system. This substitution eliminates friction, contact points, and mechanical inertia that would interfere with high-speed positioning, allowing both high productivity and high precision to be achieved simultaneously
3Reliability
If mechanical members are used to fold and stabilize the wrapping sheet, then wrapping control improves, but the risk of creases and incorrect positioning increases at high speeds
Solution Approach 1:
Pneumatic devices replace mechanical folding and stabilizing members, providing control through air pressure rather than physical contact. This eliminates the sources of creases and positioning errors that arise from mechanical friction, pressure points, and contact interference, while maintaining reliable wrapping control
Solution Approach 2:
The pneumatic field acts as an intermediary control mechanism that stabilizes and positions the wrapping sheet without direct mechanical contact. This intermediate pneumatic control system provides reliable wrapping control while avoiding the harmful effects of mechanical contact that cause creases and positioning errors at high speeds
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 approach effectively controls the wrapping sheet's position and reduces creases, enabling increased production speed without negatively impacting the quality of the finished product.
Implementation Method 1
the wrapping sheet is supported by air cushions during a movement toward a group of products to be packaged, so as to wrap the wrapping sheet around the group of products
Data Source
AI summary
The machine for packaging groups of products in a wrapping sheet, includes a device for spreading a wrapping sheet and a handling device, adapted to reciprocally move a group of products to be packaged and the wrapping sheet, so as to wrap the wrapping sheet around the group of products as a result of the reciprocal movement between the wrapping sheet and group of products. The machine further includes temporary support members adapted to support flaps of the wrapping sheet protruding with respect to the group of products during a step of reciprocal movement between the group of products to be packaged and the wrapping sheet.