Magnetic Welding Head Alignment for Packaging Cap Sealing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing welding heads for capping apparatuses in packaging machines are complex, require numerous components, and have a limited lifespan due to misalignment issues during the cap welding process.
Innovation Solution
A simplified welding head design using a magnetic device with permanent magnets to passively adjust the position of the welding portion, eliminating the need for active control systems and reducing component count, wear, and energy consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If an active control system is used to adjust the welding portion position, then alignment precision is improved, but device complexity and energy consumption increase
Solution Approach 1:
The patent replaces the active mechanical/electronic control system with a passive magnetic field-based positioning system. Permanent magnets embedded in the support portion create magnetic fields that passively attract and position the welding portion, eliminating the need for motors, sensors, and control algorithms while achieving precise alignment.
Solution Approach 2:
The welding portion is designed to be self-positioning through magnetic attraction forces. The permanent magnets automatically draw the welding portion into the correct position without external intervention, and the spring mechanism automatically returns the welding portion to the resting position after operation, creating a self-service system that eliminates complex active control.
2Manufacturing precision
If an active control system is used to adjust the welding portion position, then alignment precision is improved, but energy consumption increases
Solution Approach 1:
The patent replaces energy-consuming active control systems (motors, solenoids, electronic sensors) with a passive magnetic field-based system that requires no external energy input. The permanent magnets continuously provide positioning force without electrical power, and the spring mechanism provides return force without energy consumption.
Solution Approach 2:
The system uses elastic potential energy stored in the spring and magnetic field energy from the permanent magnets to achieve positioning and return movements, eliminating the need for continuous external energy input. The system is self-sustaining once initialized, requiring minimal energy compared to active control systems.
3Manufacturing precision
If a complex welding head design is used, then alignment precision is improved, but lifespan decreases due to wear
Solution Approach 1:
The patent replaces mechanical linkages, gears, and actuators with a magnetic field-based positioning system. The welding portion moves directly under the influence of magnetic fields and spring forces without mechanical intermediaries, eliminating wear at joints, bearings, and connection points while maintaining precise alignment.
Solution Approach 2:
The spring mechanism provides automatic return to the resting position without requiring mechanical reset operations or complex repositioning systems. This simple elastic recovery mechanism has no moving parts that wear, significantly extending the lifespan of the welding head compared to active control systems with multiple mechanical components.
4Adaptability or versatility
If numerous components are used in the welding head, then functionality is improved, but ease of repair deteriorates
Solution Approach 1:
The patent combines multiple functions into integrated components: the support portion with embedded permanent magnets provides both positioning and alignment functions, the spring mechanism provides both return force and positioning, and the welding portion integrates the welding element with the positioning mechanism. This reduction of discrete components simplifies repair while maintaining full functionality.
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 simplified design enhances the lifespan of the welding head, reduces wear, and saves energy while ensuring precise cap alignment and welding, thus improving the efficiency and reliability of the capping process.
Implementation Method 1
a magnetic device with permanent magnets to passively adjust the position of the welding portion
Implementation Method 2
The welding head welds the cap to the collar by electromagnetic induction, according to the manner described in WO-A-2017060060
Implementation Method 3
The welding disk is welded by electromagnetic induction to the protruding portion: the electric current induced in the conductive layer by an inductor of the welding head melts the heat-sealable layer
Data Source
Figure 1
Figure 2
Figure 3
AI summary
There is described a welding head (17) configured to weld a cap (6) to a pouring collar (5) and comprising: a support portion (20) configured to be advanced along an operative path (P) for following the sealed package (2) along an advancement direction (D); a welding portion (22) movably coupled to the support portion (20) and including a welding device (23) configured to interact with the cap (6) for welding the cap (6) thereon (5); the welding portion (22) is configured to move, with respect to the support portion (20), between a first position in which it is aligned in a resting configuration with the support portion (20), and a plurality of second positions in which it is displaced relatively to the support portion for assuming a corrected configuration thereby adapting to an actual positioning of the cap (6) with respect to the advancement direction (D); the welding head (17) further comprises a magnetic device (25) configured to bias the welding portion (22) towards the first position.