Welding Device Weighing Plate Height Adjustment
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Solution Overview
Problem
Existing welding devices for packaging cold cuts with integrated scales suffer from accuracy issues due to the base film protruding beyond the weighing plate, causing friction and edge deformation, which affects the weighing result.
Innovation Solution
The surface of the weighing pan is designed to be higher than the surrounding base surface by the measuring path, using a removable plastic plate or mat with a structured surface to prevent slipping and reduce friction, and incorporating an ejector with recesses to ensure accurate weighing without interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the base film protrudes beyond the weighing plate surface, then the welding device can accommodate the base film for packaging, but the protruding edge causes friction and deformation that falsifies the weighing result
Solution Approach 1:
The weighing plate surface is raised vertically above the base surface level by the measuring path distance, creating a height difference that eliminates the horizontal friction problem. This dimensional change allows the base film to overhang freely without contacting the base surface edges during weighing, thus maintaining both film accommodation and weighing accuracy.
2Measurement precision
If the weighing plate surface is raised above the base surface, then weighing accuracy is improved by eliminating friction, but the ejector must be integrated without interfering with the weighing process
Solution Approach 1:
The ejector is positioned within recesses or free spaces formed in the raised weighing plate surface. This nesting approach allows the ejector to be integrated into the weighing plate structure without interfering with the weighing process, as the ejector operates in the vertical space created by the raised surface and recesses.
3Area of stationary object
If a plastic plate or mat is used to increase the weighing plate surface, then the surface area is increased to prevent base film slipping, but the additional component increases device complexity
Solution Approach 1:
The plastic plate or mat is designed as a removable component that can be easily installed and removed from the weighing plate. This dynamic design allows the surface area to be increased when needed for preventing base film slipping, while maintaining simplicity when the plate is removed, thus balancing functionality and 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
This design eliminates the influence of deformation resistance on the weighing result, providing precise and unadulterated weight measurements even with an ejector in place, ensuring accurate packaging weight detection.
Implementation Method 1
welding device for welding the edges of a base film, which is arranged on a weighing pan of the scales and carries the cold cut, to the edges of a cover film over several, in particular four, surrounding the weighing pan and against one fixed base area with heating elements that can be folded down like pliers
Data Source
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AI summary
A sealing device with an integrated scale (9) for packaging sliced meat from a deli slicer has a vertically movable weighing plate (8) within a stationary, heated base (10), against which bars (11) can be folded in a pincer-like manner. A base film containing the sliced meat, extending beyond the weighing plate (8), and a top film lie at the edges over the base and are sealed by the pressure of the folding bars (11). To prevent the stationary base (10) from distorting the weighing result, the surface of the weighing plate (8), which may be formed by a plastic plate or plastic mat (13), is positioned at least by the amount of the deflection caused by the measuring path higher than the surrounding base (10).