Loose Material Dosing for Waste-Free Moulded Product Compaction
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Solution Overview
Problem
Existing cellulose-based material processing for moulded products results in significant waste generation, bulkiness due to low-density reels, and limited flexibility in achieving varied thicknesses and densities.
Innovation Solution
An apparatus and method utilizing a containment body and forming chamber to compact loose powdery, fibrous, or granular material into a single dose, avoiding waste and enabling multi-layered formation with adjustable thickness and density.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If die cutting is used to cut the cellulose web into predefined shapes, then doses can be obtained for moulding, but significant waste (scrap) is created that must be removed and recovered
Solution Approach 1:
The invention changes the physical state of cellulose material from a continuous web to loose fibrous material, and changes the forming method from cutting to compacting. This parameter change eliminates the need for cutting operations that generate waste, as the loose material is directly compacted into dose shapes within moulds without generating scrap
Solution Approach 2:
The invention utilizes a phase transition in the material handling approach by transforming cellulose from a structured web form to a loose, unstructured fibrous state. This phase transition enables direct compacting into final shapes without cutting, thereby eliminating waste generation while maintaining ease of manufacture
2Adaptability or versatility
If air-laid cellulose web is used to form doses, then the material is easily deformable and formable, but the reels are particularly bulky and low density
Solution Approach 1:
The invention applies preliminary compacting action to the loose cellulose material during the dosing process itself. By compacting the material into dense dose forms before moulding, the system achieves both high formability (since the doses are pre-formed and dense) and compact storage (eliminating bulky reels), as the material is densified in its final usable form
Solution Approach 2:
The invention introduces dynamic density control by allowing the cellulose material to transition from a loose, low-density state during feeding to a compact, high-density state during dosing. This dynamic transformation enables the material to maintain formability during processing while achieving compact storage density, eliminating the need for bulky reels
3Productivity
If a film with constant thickness and density is used, then the moulding process is straightforward, but flexibility in obtaining different thicknesses and densities is poor
Solution Approach 1:
The invention employs dynamic control of material properties by allowing the loose cellulose filling to be compacted to varying degrees. This enables continuous adjustment of dose thickness and density during the dosing process, providing high versatility while maintaining efficient moulding operations, as the compacting parameters can be adjusted without changing the fundamental process
4Quantity of substance
If waste recovery steps are implemented to avoid excessive consumption of cellulose material, then material usage is optimized, but additional operations and processing costs are incurred
Solution Approach 1:
The invention converts the potential harm of waste generation into a benefit by designing a process where no waste is created in the first place. By using loose material compacting instead of web cutting, the system eliminates scrap generation entirely, optimizing cellulose consumption without requiring any waste recovery operations or additional processing steps
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
Reduces waste, eliminates bulky reels, and enhances versatility in producing moulded products with customizable thickness and density, including multi-layered structures.
Implementation Method 1
transferring the material contained in the containment body to the inside of a forming chamber
Implementation Method 2
a compacting unit operatively engaged in said forming chamber to compact the loose material to an intermediate density between the starting density and the final density of the moulded product
Data Source
AI summary
Apparatus and method for making moulded products that includes a containment body for a predefined quantity of loose material such as powdery, fibrous or granular material. The body has at least one expelling opening for expelling the loose material. The molded products also include a forming chamber having a bottom wall and an access opening configured to be in communication with the expelling opening to allow the passage of the material from the containment body above the bottom wall; and a compacting unit operatively engaged in the forming chamber to compact the loose material and to define a dose in a single body.