Welding Unit for Flexible Pouch Forming Machines
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Solution Overview
Problem
Existing welding units for automatic flexible pouch forming machines are inefficient due to the need for multiple pairs of pressure and heat applicators, which increases the size and complexity of the machine, and requires more space and complex control systems.
Innovation Solution
A welding unit with a compact arrangement of pressure and heat applicators, where first and second pressure applicators form a path for a pouch precursor, and third and fourth pressure applicators form a second path, with shared driving means and heating elements, allowing simultaneous movement and operation of all applicators.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple pairs of pressure and heat applicators are arranged linearly to increase productivity, then the welding unit can perform multiple welds simultaneously, but the size of the welding unit and container forming machine increases
Solution Approach 1:
The patent transitions from a linear arrangement of applicators along the forward movement direction to a spatial arrangement where applicators are distributed across multiple lateral elements (first lateral element, central element, second lateral element) that can move in a direction transverse to the forward movement. This dimensional change allows multiple welds to be performed simultaneously without proportionally increasing the footprint in the forward direction, thereby improving productivity while controlling the overall size of the welding unit.
2Productivity
If multiple pairs of pressure and heat applicators are arranged to increase productivity, then multiple welds can be done simultaneously, but the number of parts and device complexity increases
Solution Approach 1:
The patent merges the control functions by providing a single driving mechanism that simultaneously moves multiple lateral elements (first lateral element, central element, second lateral element) in coordination. This consolidation of the driving system reduces the number of independent control systems needed, thereby maintaining productivity while reducing device complexity compared to having separate driving mechanisms for each applicator pair.
Solution Approach 2:
The driving mechanism serves multiple functions by simultaneously controlling the movement of multiple lateral elements and their associated applicators. This multi-functional design allows a single mechanism to manage the coordination of multiple weld operations, reducing the overall number of components and simplifying the control architecture while maintaining high productivity.
3Productivity
If multiple pairs of pressure and heat applicators are arranged along the forward movement direction, then productivity increases, but the space required for installation increases
Solution Approach 1:
The patent redistributes the applicators from a linear arrangement along the forward movement direction to a spatial configuration involving lateral elements that move transversely. This allows the welding unit to perform multiple welds simultaneously using space in the transverse direction rather than extending the footprint in the forward direction, thereby improving productivity while minimizing the installation space footprint.
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 solution doubles the productivity of the welding unit by allowing simultaneous welding of two pouch precursors with reduced components and complexity, eliminating the need for complex control systems and minimizing space requirements.
Implementation Method 1
heating means heating at least one of said first and second pressure applicators
Implementation Method 2
the pressure applicators press and apply heat on the first pouch precursor to form a weld
Data Source
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AI summary
It is disclosed a welding unit for an automatic flexible pouch forming machine comprising a first lateral element that comprises a first pressure applicator; a central element that comprises a second pressure applicator and a third pressure applicator on opposite sides thereof; a second lateral element that comprises a fourth pressure applicator; the first and second pressure applicators forming a first path for a first pouch precursor and the third and fourth pressure applicator forming a second path for a second pouch precursor; and wherein at least one of said first and second pressure applicators and at least one of said third and fourth pressure applicators, simultaneously move from a release position to a welding position, and vice versa, driven by driving means. It is also disclosed an automatic flexible pouch forming machine comprising a welding unit according to the present invention.