Magnetizable Monofilament Thread for 3D Printed Plastic Parts
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Solution Overview
Problem
The existing methods for producing plastic parts with painted surfaces, such as those used in extrusion or injection molding, require high structural complexity and increased production costs, making them impractical for individual items or small series production.
Innovation Solution
A method involving the extrusion of a magnetizable monofilament thread using a 3D printer, where the thread is magnetized in specific areas and then coated with a paint containing magnetically orientable particles, allowing for effect coatings or inscriptions that cannot be removed without destruction, enabling simpler and more economical production of plastic parts with complex designs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If extrusion or injection molding is used to produce plastic parts with painted surfaces, then the production of high quantities and series is efficient, but the structural complexity of the molding systems and tools increases and production costs rise
Solution Approach 1:
The patent replaces complex mechanical molding systems with a 3D printing system that uses magnetic fields and magnetizable particles to achieve the painting effect. Instead of using complicated extrusion or injection molding tools to create painted surfaces, the invention uses a simpler 3D printer to build the base part, then applies magnetic fields to orient particles in the paint layer, substituting mechanical complexity with magnetic field control.
Solution Approach 2:
The patent changes the physical state and properties of the paint layer by using magnetizable particles that can be oriented through magnetic field application. By controlling the magnetic field parameters (strength, direction, timing), the system can create different paint patterns and effects without changing the mechanical molding system, thus reducing device complexity while maintaining productivity.
2Productivity
If extrusion or injection molding is used to produce plastic parts with painted surfaces, then series production is efficient, but production costs increase due to high structural complexity
Solution Approach 1:
The patent replaces expensive, complex molding systems with a more economical 3D printing approach. The base plastic parts are printed using standard 3D printing technology, and the painted effect is achieved through magnetic field application rather than expensive multi-cavity molds or complex tooling, thereby reducing production costs while maintaining series production capability.
Solution Approach 2:
The patent creates a universal manufacturing system where a single 3D printer can produce both the base parts and the painted effects using magnetizable particles. This multi-functional approach eliminates the need for separate molding systems for different paint patterns, reducing overall production costs while maintaining efficiency for series production.
3Productivity
If traditional molding methods are used, then high quantity production is justifiable, but individual items or small series production becomes disproportionate and impractical
Solution Approach 1:
The patent introduces dynamic control through magnetic fields that can be easily adjusted and reprogrammed for different production needs. The same 3D printing system can switch between producing individual parts or series production by simply changing the magnetic field application parameters, providing the adaptability needed for small batches while maintaining efficiency for larger quantities.
Solution Approach 2:
The patent enables flexible production by changing the parameters of magnetic field application rather than requiring different physical molding systems. For individual items, magnetic fields can be applied selectively; for series production, the same magnetic field patterns can be repeated efficiently, thus providing adaptability across different production volumes without increasing device complexity.
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
This method allows for the creation of durable, effect coatings or inscriptions on plastic parts with high sharpness and versatility, suitable for various applications, including consumer products, by using a 3D printer to form and magnetize the parts, reducing production complexity and costs.
Implementation Method 1
magnetizing the magnetizable polymer composition forming the plastic part in regions to be painted subsequently by applying a magnetic field
Implementation Method 2
the magnetically orientable particles within the applied paint are oriented accordingly and agglomerate in the area of the applied magnetic field
Data Source
AI summary
The invention relates to a method for producing plastic parts having a coated surface, wherein the plastic part is moulded from a thermoplastic moulding compound and, subsequently, a coating layer is applied to the surface of the plastic part, and wherein a magnetizable polymer composition is used as a thermoplastic moulding compound and, during or after the moulding of the plastic part, the moulding compound is magnetized in areas by applying a magnetic field and, in a subsequent step, a coating containing a magnetically orientable particle is applied to the surface of the moulded plastic part to form the coating layer (10). According to the invention, firstly a magnetizable monofilament thread is extruded from the thermal moulding compound and the thread is moulded into the plastic part in a 3D printer. A corresponding monofilament thread for carrying out the method and a use are also disclosed.