Can Packaging Blank With Haptic Relief and Smooth Inner Surface
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Solution Overview
Problem
Can packaging designs that aim to be haptically distinctive often result in reduced interior space and increased residue issues during filling and emptying due to deformation of the inner surface accompanying outer surface shaping.
Innovation Solution
A device for producing can packaging blanks by reverse extrusion, featuring a die with projections that create haptic outer surface features without altering the inner surface, allowing for variable wall thickness and relief-like patterns on the outer side while maintaining a smooth inner surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If deformation treatment is applied to the outer surface to make the can packaging haptically distinctive, then the can packaging becomes distinguishable, but the inner surface is also deformed causing reduced interior space and residue issues
Solution Approach 1:
The can packaging wall is segmented into two distinct surfaces: the outer surface with haptic features for distinguishability and the inner surface remaining smooth for functional performance. This segmentation allows each surface to serve its specific purpose without compromising the other.
Solution Approach 2:
Different quality characteristics are applied to different regions of the can packaging wall. The outer surface has variable thickness and haptic features for tactile distinguishability, while the inner surface maintains uniform thickness and smoothness for optimal interior space and filling/emptying performance.
2Shape
If deformation treatment is applied to the outer surface to make the can packaging haptically distinctive, then the can packaging becomes distinguishable, but filling and emptying become slower with more residues
Solution Approach 1:
The inner surface is maintained with uniform thickness and smoothness to ensure fast filling and emptying operations with minimal residues, while the outer surface independently provides haptic distinguishability through controlled thickness variations.
3Productivity
If the can packaging has a smooth cylindrical shape, then filling and emptying are efficient, but the can packaging is not haptically distinguishable
Solution Approach 1:
The can packaging functionality is segmented into two independent surface characteristics: a smooth inner surface for efficient filling/emptying and an externally structured outer surface for haptic distinguishability, allowing both requirements to be satisfied simultaneously.
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
Enables the creation of haptically distinguishable can packaging that can be filled and emptied efficiently, with reduced residue issues and maintained inner surface smoothness, ensuring a tight connection for sealing.
Implementation Method 1
The production of a thin-walled metal tube by reverse extrusion is described in German Patent No. DE 29 32 016 C2
Implementation Method 2
An extrusion process is a deformation process, wherein the deformation of a workpiece takes place by means of compressive loading
Data Source
AI summary
The invention relates to an apparatus for producing a can packaging blank by backward extrusion. The apparatus has a die wall and an extrusion punch, wherein the die has a die base and a die wall having a die wall height HG. The die wall has, in the region thereof adjacent to the die base, at least one protrusion having predetermined width (B), predetermined height (H), predetermined depth (T) and predetermined cross-section, wherein the height (H) of the protrusion equals 95% of the die wall height (HG) at maximum.