Carbon-Plastic 3D Printed Sliding Components
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing sliding materials with graphite or molybdenum sulphide lubricants fail to maintain low frictional resistance and thermal/electrical conductivity in dry or high-altitude conditions, lacking mechanical stability and complex structure capabilities.
Innovation Solution
A three-dimensional component composed of a porous carbon body in a plastics matrix produced by 3D printing, using a powdered composition of amorphous carbon, graphite, or hybrid forms, with a liquid binder, and subsequent carbonisation or graphitisation to enhance thermal and electrical conductivity, and recompaction processes for improved properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If traditional injection moulding with resin-coated graphite particles is used, then mechanical stability is achieved, but thermal conductivity and electrical conductivity are not sufficiently high
Solution Approach 1:
The patent changes the surface treatment parameter of carbon particles from resin coating to silane coupling agent coating, which creates a chemical bond between carbon particles and the plastics matrix. This parameter change enables both high mechanical stability and high thermal/electrical conductivity simultaneously, as the silane-based interface allows efficient phonon and electron transport while maintaining strong adhesion.
Solution Approach 2:
The patent uses a composite material system consisting of carbon particles, silane coupling agent, and plastics matrix. The silane coupling agent forms an intermediate layer that chemically bonds to both carbon particles and the plastics matrix, creating a tri-phase composite structure that optimizes both mechanical properties and thermal/electrical conductivity by facilitating efficient stress and energy transfer across interfaces.
2Force
If self-lubricating materials like graphite or molybdenum sulphide are used, then low frictional resistance is achieved under lubricated conditions, but performance deteriorates in dry or high-altitude conditions
Solution Approach 1:
The patent changes the environmental condition parameter by designing a material system that does not depend on atmospheric moisture or oxygen for its lubricating function. The silane-crosslinked carbon-plastics composite maintains its low frictional resistance and self-lubricating properties through inherent material characteristics rather than environmental interaction, ensuring reliable performance across all atmospheric conditions including vacuum and high altitude.
3Reliability
If complex structures like cooling channels and undercuts are required, then functional performance is improved, but manufacturing complexity and cost increase
Solution Approach 1:
The patent replaces complex mechanical manufacturing processes (such as multi-step machining, tooling, and assembly operations) with a chemical curing process. The slurry is cast into a mold and cured through chemical reaction to form complex three-dimensional structures with internal cooling channels and undercuts in a single step, eliminating the need for complex mechanical tooling and multiple manufacturing stages.
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 method produces components with enhanced thermal and electrical conductivity, mechanical stability, and complex structures like cooling channels, suitable for sliding applications under various conditions, while maintaining cost-effectiveness and simplicity.
Implementation Method 1
The surfaces of the carbon particles are treated with a silane coupling agent before being incorporated into the plastics matrix
Implementation Method 2
The component has improved properties in terms of thermal conductivity and electrical conductivity
Implementation Method 3
The component has improved properties in terms of thermal conductivity and electrical conductivity
Data Source
AI summary
A composite material containing carbon and a plastic includes: a) provision of a pulverulent composition with one or more components of amorphous carbon, graphite and mixed forms thereof, b) provision of a liquid binder, c) planar deposition of a layer consisting of the material provided in step a) and local deposition of droplets of material provided in step b) onto this layer and any number of repetitions of step c), the local deposition of the droplets in the successive repetitions of this step being adapted according to the desired shape of the component to be produced, d) at least partial curing or drying of the binder to obtain a green body that has the desired shape of the component, e) impregnation of the green body with a liquid synthetic resin and f) curing of the synthetic resin to produce a synthetic resin matrix.