Molded Pulp Coffee Capsule Forming for High-Speed Production
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Solution Overview
Problem
Current coffee capsules made from plastics and aluminum pose significant recycling challenges due to mixed materials and resource inefficiency, and existing pulp fibre technologies are too slow and expensive to produce frusto-conical shapes at high volumes, making them unsuitable for replacing traditional capsules.
Innovation Solution
A high-speed process using moulded pulp fibres to create capsules with a frusto-conical shape, involving a continuous feed belt with articulated mesh toolsets, partial immersion in a pulp fibre suspension, vacuum application, and subsequent heat and pressure application to form a one-piece integral capsule body and lid, ensuring compatibility with existing coffee machines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If traditional plastics or aluminium are used to form capsules, then manufacturing ease and oxygen barrier performance are improved, but recycling difficulty and environmental sustainability worsen
Solution Approach 1:
The patent changes the material parameter from traditional plastics or aluminium to pulp fibre, transforming the capsule from non-recyclable or difficult-to-recycle material to fully compostable and recyclable material while maintaining manufacturing feasibility through high-speed pulp forming technology
Solution Approach 2:
The patent employs a disposable pulp fibre capsule that is designed for single use but can be easily composted or recycled, replacing expensive and persistent plastic/aluminium capsules with an economical and environmentally friendly alternative that aligns with sustainable waste management principles
2Productivity
If high-speed production is required for economic viability, then productivity is improved, but existing pulp fibre technology becomes unsuitable due to slow production speed
Solution Approach 1:
The patent introduces a dynamic, continuous high-speed pulp forming process that replaces static, batch-processing traditional pulp methods. The system uses a continuously moving belt with articulated mesh toolsets that progress through immersion, vacuum formation, and drying zones, enabling production speeds comparable to traditional capsule manufacturing
Solution Approach 2:
The patent implements a continuous production process where pulp fibre capsules are formed without interruption on a continuously moving belt. The articulated mesh toolsets remain constantly engaged with the pulp suspension and processing zones, eliminating downtime between capsule formations and achieving high-volume production capability
3Adaptability or versatility
If frusto-conical capsule shapes are produced, then compatibility with existing coffee machines is improved, but existing pulp fibre technology becomes too expensive and slow
Solution Approach 1:
The patent applies preliminary shaping to the pulp fibre mat before final capsule formation. The articulated mesh toolsets pre-form the frusto-conical geometry and structural features during the vacuum formation stage, enabling subsequent rapid drying and finishing without requiring slow, post-formation machining or shaping operations
Solution Approach 2:
The patent replaces traditional mechanical capsule forming methods with a vacuum-based pulp formation system. The vacuum field draws pulp fibres onto the articulated mesh toolsets and forms the frusto-conical shape through pressure differential rather than mechanical compression, significantly reducing production time and cost
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
The process enables the production of pulp fibre capsules that are dimensionally and functionally equivalent to traditional capsules, offering improved sustainability and economic viability while maintaining performance and convenience, allowing for high-volume production of recyclable and compostable coffee capsules.
Implementation Method 1
vacuum means applied to said belt to draw said pulp fibres onto said mesh toolsets immersed in said suspension to form a preform pulp mat of said product
Implementation Method 2
said belt being inclined to allow partial immersion and partial withdrawal from said suspension by continuous rotation of said belt
Implementation Method 3
This may be done in one process or in multiple separate processes wherein the pressure and deformation happens in one stage without the application of heat, whilst the heat and drying is applied at a separate stage
Implementation Method 4
The moisture content within the part, the type of fibre, the position and shape of steam extraction vents and the addition of chemicals which increase slip, will define the mobility of the fibres. The second toolset would deform the pulp fibre under pressure with the third toolset applying heat to dry the product
Data Source
AI summary
An apparatus for high speed continuous thermoforming of pulp materials into pulp based products including a beverage dispensing capsule comprising a body having a side wall and a base formed entirely of moulded pulp fibres, said apparatus comprising a holding tank for water and pulp fibres in suspension, a continuous feed belt of articulated mesh toolsets contoured to the preform shape of said products, said belt being inclined to allow partial immersion and partial withdrawal from said suspension by continuous rotation of said belt, vacuum means applied to said mesh toolsets to draw said pulp fibres onto said mesh toolsets immersed in said suspension to form a preform pulp mat of said product.