Multilayer Particulate Article Mold with Removable Element
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Solution Overview
Problem
Current methods for producing multilayer articles fail to effectively combine transverse and longitudinal layers from particulate materials, limiting the diversity and properties of the final product.
Innovation Solution
A method involving a mold with a removable element, where particulate components are compressed along specific axes to form layers with orthogonal interfaces, allowing for the creation of free-standing, self-supporting multilayer articles with varying compositions and properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional pressing or extrusion methods are used to form multilayer articles, then the manufacturing process is simple, but the ability to create complex multilayer structures with both transverse and longitudinal layers is limited
Solution Approach 1:
The mould is divided into multiple cavities (first mould cavity, second mould cavity, third mould cavity) that can be independently filled and compressed. This segmentation allows different particulate components to be placed in separate cavities and compressed to form distinct layers with different orientations (transverse and longitudinal), enabling complex multilayer structures while maintaining manageable mould design
Solution Approach 2:
The method employs nested cavities where the first mould cavity contains a first removable element, the second mould cavity contains a second removable element, and these are positioned within or adjacent to each other. This nesting arrangement allows sequential filling and compression of different particulate components to form multiple layers with orthogonal interfaces, achieving high adaptability without proportionally increasing overall device complexity
2Strength
If higher compression force is applied to form additional layers, then the mechanical integrity of the multilayer article is improved, but the risk of damaging previously formed layers increases
Solution Approach 1:
The first particulate component is compressed to form a stable first layer before the second and third particulate components are added and compressed. This preliminary formation of the base layer provides structural support that allows subsequent layers to be compressed with higher forces needed for their densification, while the already-formed first layer acts as a stable foundation that resists damage from the compression of overlying layers
Solution Approach 2:
Different compression forces are applied to different particulate components based on their specific requirements. The first particulate component receives a first compression force, while the second and third particulate components receive a second compression force that is greater than the first. This localized differentiation of compression parameters allows each layer to achieve optimal density and mechanical properties without compromising previously formed layers
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 manufacture of multilayer articles with enhanced mechanical integrity and customizable properties, suitable for diverse industrial applications including pharmaceutical, detergent, ceramics, and explosives industries.
Implementation Method 1
compressing the first particulate component along a first axis in a first compression step to form a first layer by applying a first compression force to the first particulate component
Data Source
Figure 1a~1i
Figure 2~3
AI summary
A method of making a multilayer article comprises: providing a mould (2) defining a first mould cavity (4), wherein the mould (2) comprises a removable element (6) within the first mould cavity (4); placing a first particulate component (8) in the first mould cavity (4); compressing the first particulate component (8) along a first axis in a first compression step to form a first layer (12) of the multilayer article by applying a first compression force to the first particulate component;removing the removable element (6) from the first mould cavity (4) after formation of the first layer (12); placing one or more additional particulate components (20, 32) in the mould (2), wherein a portion of the one or more additional particulate components occupies a space formerly occupied by the removable element (6); compressing the one or more additional particulate components (20, 32) along the first axis in one or more additional compression steps after removal of the removable element (6) to form one or more additional layers (24, 38) of the multilayer article, wherein the first layer (12) meets one of the one or more additional layers (24, 38) along a first interface substantially parallel to the first axis and the first layer (12) meets one of the one or more additional layers (24, 38) along a second interface substantially perpendicular to the first axis; and removing the multilayer article from the mould (2). The one or more additional compression steps comprise applying a compression force greater to the one or more additional particulate components (20, 32) prior to removing the multilayer article from the mould (2) that is greater than the first compression force applied to the first particulate component (8) to form the first layer (12).