Rib Guide Pouring Element for Beverage Cartons
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Solution Overview
Problem
Existing pouring elements for composite packs, such as beverage cartons, face challenges in material efficiency, production complexity, and incomplete opening due to constant kinematics and high material consumption, leading to issues like 'PE pulling' and increased manufacturing costs.
Innovation Solution
A pouring element with a self-contained rib guide on the inner wall of the pouring tube allows for variable and staggered kinematics of the cutting element, avoiding undercuts and enabling easier demolding, reduced material usage, and enhanced rigidity, while cams on the cutting element provide secure guidance and locking mechanisms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If thread-based guide means are used to guide the cutting element, then secure guidance is achieved, but the kinematics are limited to constant feed and PE pulling occurs
Solution Approach 1:
The patent replaces static thread-based guidance with dynamic rib-based guidance that allows variable kinematics. The cutting element can perform both axial and rotational movements independently, enabling staggered motion patterns that prevent PE pulling while maintaining secure guidance through the rib-cam interaction.
Solution Approach 2:
The patent changes the guidance parameters from fixed thread pitch to variable rib profiles. The rib geometry can be optimized to provide different guidance characteristics at different stages of the cutting process, allowing adaptation to prevent polyethylene film stretching while maintaining cutting effectiveness.
2Reliability
If massively dimensioned guide and force transmission means are used to achieve staggered kinematics, then cutting function is improved, but material consumption increases and injection molding cycle times increase
Solution Approach 1:
The patent segments the guidance function into separate rib structures on the base element and corresponding cam structures on the cutting element. This segmentation allows each component to be optimized independently and reduces the overall mass required for force transmission while maintaining staggered kinematics functionality.
Solution Approach 2:
The patent uses thin-walled rib and cam structures instead of massively dimensioned components. The optimized wall thicknesses provide sufficient rigidity for force transmission while minimizing material consumption and injection molding cycle times.
3Reliability
If thick wall thicknesses are used to ensure rigidity and functional reliability, then functional reliability is improved, but material consumption increases and injection molding cycle times increase
Solution Approach 1:
The patent employs thin-walled structures with optimized wall thicknesses for the base element, cutting element, and rib components. These thin-walled designs provide sufficient structural rigidity through optimized geometry rather than increased thickness, reducing material consumption and injection molding cycle times while maintaining functional reliability.
4Ease of manufacture
If self-contained rib guide is used, then material usage is reduced and demolding is easier, but guidance security must be maintained
Solution Approach 1:
The patent inverts the traditional approach by forming the guide ribs directly on the inner wall of the pouring tube rather than as separate components. This integrated rib structure eliminates the need for undercuts in separate guide components, facilitating easier demolding while maintaining guidance security through the rib-cam interaction mechanism.
Data Source
Figure 1
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Figure 4~5
AI summary
Disclosed are a pouring element (A) for a composite packaging (P), in particular a beverage carton for liquid foodstuffs, said element comprising: a main body (2) with a fastening flange (5) and a spout (6), a cutting element (3) provided and guided in the spout (6), first guide means (7) formed in the spout (6) and second guide means (8) formed on the cutting element (3), the first and the second guide means (7, 8) correspondingly co-operating with one another; and a composite packaging (P), in particular a beverage carton for liquid foodstuffs, comprising a gable-type packaging end panel (1) suitable for receiving a pouring element (A). In order to optimize the production of the pouring element (A) from a material and production standpoint and to guarantee the initial opening of the composite packaging (P) in the region of a weakened section of the packaging material, according to the invention, the first guide means (7) is formed by a peripheral uninterrupted rib (9).