Continuous Motion Wrapping Infeed Assembly Velocity Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing wrapping machines for products like napkins and toilet paper rolls are limited by the need for reciprocating motions and transverse cutting, which reduces production speed and causes shock and vibration, and often result in incomplete compression and separation issues due to flighted infeed systems and sensitivity to film properties.
Innovation Solution
A continuous motion wrapping system with an infeed assembly using adjustable compression belts and registration belts that move at varying velocities to space and compress products, combined with a heated cutting element that moves with the product to separate the wrapping material without transverse cutting, eliminating the need for flighted infeed systems and allowing for higher production speeds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If reciprocating motion is used to wrap products, then the wrapping operation can be completed, but production speed is reduced and shock and vibration occur
Solution Approach 1:
The patent implements continuous linear motion through the wrapping assembly, eliminating reciprocating movements. The product moves continuously in one direction through the wrapping zone while the wrapping material is applied and sealed in real-time, maintaining constant productive action without reversal or interruption.
Solution Approach 2:
The patent replaces complex mechanical reciprocating mechanisms with a simplified continuous linear transport system. The wrapping operation is achieved through coordinated movement of the product conveyor and wrapping material feed system, eliminating the need for flighted conveyors and mechanical folding mechanisms that cause vibration and shock.
2Reliability
If transverse cutting is used to separate wrapping material, then separation between units is achieved, but the cutting step limits machine speed and prevents complete product compression
Solution Approach 1:
The patent replaces mechanical transverse cutting with thermal separation. A heated element moves with the product along the tube of wrapping material, melting and separating the thermoplastic material between units. This thermal process eliminates the speed limitations of mechanical cutting and allows complete product compression before separation.
Solution Approach 2:
The patent changes the separation mechanism from mechanical force to thermal energy. By heating the wrapping material to its melting point, the thermoplastic tube is separated between units through melting rather than cutting, enabling continuous high-speed operation and complete product compression.
3Ease of operation
If flighted infeed systems are used, then product feeding is achieved, but timing issues cause flight jams and separation problems
Solution Approach 1:
The patent replaces flighted infeed systems with a continuous belt conveyor system. The product is fed linearly along the belt through the wrapping zone without flighted mechanisms, eliminating timing synchronization issues and flight jams while maintaining reliable product feeding.
4Productivity
If the wrapping machine operates at high speed, then production efficiency increases, but shock and vibration become severe
Solution Approach 1:
The patent maintains continuous linear motion throughout the wrapping assembly, eliminating reciprocating movements that generate vibration and shock. The product and wrapping material move continuously in sync, allowing high-speed operation without mechanical冲击.
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 enables high-speed wrapping of products with continuous motion, ensuring complete compression and efficient separation of units without the limitations of prior art, improving production efficiency and reducing mechanical stress.
Implementation Method 1
a heated cutting element moving along the path of the tube
Implementation Method 2
adjustable compression belts and registration belts that move at varying velocities to space and compress products
Data Source
AI summary
An infeed assembly for spacing a continuous line of product into units to be wrapped in a continuous wrapping system is disclosed. At least one set of registration belts is orientated downstream of a set of spaced infeed belts in communication with a continuous line of product. The registration belts are programmed to move at the same velocity as the infeed belts to receive a product and then at a velocity greater than the infeed belt in order to separate and register one or more products into units to be wrapped and before returning to the velocity of the infeed belts.