Extensible Paper Container Forming via Pneumatic Mould Adhesion
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing methods for forming three-dimensional containers from paper material are limited by the need for costly decoration processes, inability to achieve desired shapes like cups or tubs, and reliance on non-ecological materials and processes.
Innovation Solution
A method involving the formation of a conical tubular element from extensible paper material coupled with a thermoweldable polymer film, which is preheated and inserted into a mould with undercuts, deformed by air to adhere to the mould walls, and then sealed and extracted for further processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a paper sheet is wrapped about a tube to form a container, then the container can be formed from ecological paper material, but the container presents a flat surface requiring costly printing processes for decoration
Solution Approach 1:
The mould is pre-prepared with three-dimensional decorative designs, patterns, or images on its inner surface before the forming process. This preliminary preparation eliminates the need for post-forming printing operations, as the decoration is transferred directly during the forming stage when the material adheres to the mould surface.
Solution Approach 2:
The decorative design on the mould surface serves as a template that is copied onto the container surface during the forming process. The container material takes the imprint of the mould's decorative pattern, creating a replica of the design without requiring separate printing operations.
2Shape
If plastic material is used to form containers with three-dimensional designs, then the container can achieve desired shapes and decorative appearance, but the process becomes costly and sophisticated and uses non-ecological materials
Solution Approach 1:
The invention changes the material parameter from plastic to extensible paper material, which is ecological and more economical. The paper material's extensibility property allows it to be deformed and adhered to the mould surface, achieving three-dimensional shaping without requiring the complex injection moulding processes needed for plastic containers.
Solution Approach 2:
An air flow is introduced to deform the conical tubular element and press it against the mould walls, achieving adhesion and three-dimensional shaping. This pneumatic approach simplifies the forming process compared to sophisticated mechanical injection moulding systems, reducing equipment complexity and cost.
3Shape
If injection moulding is used to form containers, then the container can be formed with three-dimensional shape, but printing can be carried out only after formation requiring very costly special methods
Solution Approach 1:
The decorative design is prepared on the mould surface in advance, before the container forming process begins. This preliminary preparation allows the decoration to be transferred during forming, eliminating the need for costly post-forming printing operations that would be required if printing were done after container formation.
Solution Approach 2:
The forming process and decoration transfer process are merged into a single operation. The container is formed and decorated simultaneously in one step, rather than as separate sequential operations. This combines the shaping function with the decoration function, reducing overall process cost and complexity.
4Ease of manufacture
If traditional folding and welding methods are used to form containers, then the container can be produced from paper material, but the container is linked to a geometry determined by folding and does not resemble traditional cups or tubs
Solution Approach 1:
An air flow is used to deform the conical tubular element and press it against the mould walls, achieving complex three-dimensional shaping. This pneumatic deformation allows the container to assume traditional cup or tub shapes that cannot be achieved through simple folding and welding operations.
Solution Approach 2:
The extensible paper material acts as a flexible shell that can be deformed and adhered to the mould surface. This flexibility allows the material to conform to complex three-dimensional mould geometries, enabling traditional cup and tub shapes while maintaining the simplicity of paper-based manufacturing.
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 three-dimensional containers with improved ornamental appearance, increased volume, and enhanced product-customer communication, while using eco-friendly materials and reducing production costs.
Implementation Method 1
The cone is preheated and then inserted into a mould
Implementation Method 2
An air flow is then fed through an aperture 16 provided in a closure cap 18 so that the cone 8 is deformed by the air and adheres to the mould walls
Data Source
Figure 1~4
AI summary
A method for forming three-dimensional containers of extensible paper material, characterised by: - forming a tubular element (2) from extensible paper material, - associating the tubular element obtained in this manner with a mould (4) negatively reproducing at least the side wall of the container to be obtained, - causing the tubular element (2) to adhere to the mould walls by utilizing the extensibility characteristics of the paper material, - closing said tubular element at at least one end.