Magnetized Build Plate Adhesion for Fused Filament Fabrication
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Solution Overview
Problem
Fused filament fabrication methods face challenges in achieving good adhesion of polymer layers on a substrate during 3D printing and subsequent easy release without damaging delicate components.
Innovation Solution
Magnetizing a substrate plate with an external magnetic field, using a first layer with magnetic material for strong adhesion and demagnetizing after printing to allow easy removal, while using a second non-magnetic layer for cost-effectiveness and avoiding adhesive residues.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If adhesive substances or coatings are used to improve adhesion of the first layer on the substrate plate, then adhesion is improved, but the component becomes difficult to separate from the substrate plate after printing
Solution Approach 1:
The substrate plate's magnetic property is changed dynamically: magnetized during printing to ensure strong adhesion of the first layer, and demagnetized after printing to enable easy separation of the component. This parameter change resolves the contradiction between strong adhesion during printing and easy separation after printing.
Solution Approach 2:
The magnetic attraction force of the substrate plate is made dynamic rather than static. The substrate plate can be magnetized when needed (during printing) and demagnetized when needed (after printing), allowing the system to adapt its adhesion strength to different process stages, thus resolving the contradiction between strong adhesion and easy separation.
2Strength
If magnetic material is added to the first layer to improve adhesion on the substrate plate, then adhesion is improved, but the material cost and complexity increase
Solution Approach 1:
Magnetic material is added only to the first layer that contacts the substrate plate, not to the entire component. This localized approach provides the necessary adhesion at the critical interface while keeping the rest of the component made from standard materials, thus resolving the contradiction between adhesion improvement and material complexity.
3Strength
If the substrate plate is heated to improve adhesion of polymer layers, then adhesion is improved, but energy consumption increases and delicate components may be damaged
Solution Approach 1:
The thermal field (heating) used for adhesion is replaced with a magnetic field. The magnetic attraction force between the magnetized substrate plate and magnetic material in the first layer provides strong adhesion without requiring high temperatures, thus resolving the contradiction between adhesion improvement and energy consumption/ component damage risk.
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
Ensures strong adhesion during printing and easy release of components without damage, counteracting layer contraction and preventing crack formation through controlled magnetic and thermal management.
Implementation Method 1
magnetizing a substrate plate
Implementation Method 2
the magnetization of the substrate plate is carried out before the start of the deposition of the first layer
Implementation Method 3
demagnetizing the substrate plate
Implementation Method 4
plastic threads (also filaments) referred to as being heated up to their melting temperature and above by means of the extruder
Implementation Method 5
a meltable substance is initially melted
Data Source
AI summary
An additive manufacturing method for a component, the component being produced layerwise by fused filament fabrication, includes magnetizing a substrate plate, depositing at least one first layer on the substrate plate, this first layer including a first substance that contains magnetic material, depositing at least one further layer of a second substance, and demagnetizing the substrate plate. An apparatus for producing a component by fused filament fabrication includes a substrate plate for depositing layers of the component, wherein the substrate plate is magnetized before depositing a first layer on the substrate plate, the first layer including a first substance that contains magnetic material, and further layers including a second substance that does not contain a magnetic material are deposited on the first layer, and the substrate plate is demagnetized after forming the part.