Cylindrical Packaging for Pasty Materials with Reinforced Cup Base
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Solution Overview
Problem
Existing cylindrical packaging for pasty filling goods faces challenges in maintaining structural integrity and preventing deformation when filling material is pressed out, requiring thick materials for the bottom which restricts volume and causes emptying issues, while the valve opening area needs to be thin to avoid high ejection pressure.
Innovation Solution
The packaging features a cup-shaped base for reinforcement, allowing a thin-walled bottom with valve openings, and a deep-drawn or injection-molded lid with a flared edge and circumferential ribs for sealing, along with a flexible base design and radially cut valve openings for easy opening and secure closure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the bottom is made thick to prevent deformation when filling material is pressed out, then structural stability is improved, but the packaging volume is reduced and ejection pressure becomes unreasonably high
Solution Approach 1:
The bottom is divided into two distinct regions: a thick-walled peripheral region that provides structural support and prevents deformation, and a thin-walled central region that reduces ejection pressure and maximizes packaging volume. This segmentation allows each region to fulfill its specific function optimally without compromise.
Solution Approach 2:
Different wall thicknesses are applied to different locations of the bottom: the peripheral area has increased wall thickness for structural stability, while the central area maintains thin walls for low ejection pressure. This local differentiation of material properties resolves the contradiction between stability and pressure requirements.
2Stability of the object's composition
If the bottom is made thick to prevent deformation when filling material is pressed out, then structural stability is improved, but ejection pressure becomes unreasonably high
Solution Approach 1:
The bottom is segmented into thick peripheral walls for structural support and a thin central region for material ejection. This segmentation creates a pressure distribution pathway where the thin central area allows material to be ejected at lower pressures while the thick peripheral area maintains structural integrity.
Solution Approach 2:
The bottom exhibits spatially varying wall thickness with localized thinning in the central ejection area. This local quality variation reduces the pressure required for material ejection while the thicker peripheral regions maintain overall structural stability.
3Manufacturing precision
If the lid is made of plastic by injection molding, then manufacturing precision and sealability are improved, but device complexity increases
Solution Approach 1:
The lid integrates multiple functions into a single injection-molded plastic component: the sealing surface, the structural body, and the integration features for attaching to the packaging. This merging of functions achieves high manufacturing precision while the一体化 design actually reduces overall device complexity compared to assembling multiple separate components.
Data Source
Figure 1
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AI summary
The cylindrical packaging (1) has a coiled shell (2) made of cardboard that is closed along a longitudinal seam (3) and provided with a cup-shaped cover (4). The bottom of the cover is penetrated into the interior of shell and edge (6) of the cover is arranged inside the shell. A valve opening (10) is provided in the bottom edge (5) of the shell in inward direction and crimped with the shell by welding or adhesive bonding process.