Plastic vessel comprising an accommodated metal element and method of producing the same
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Solution Overview
Problem
Plastic vessels with embedded metal elements, such as magnetic components, often suffer from cracking due to thermal expansion differences during the injection molding process, leading to a short service life and inadequate protection of the metal element, especially when exposed to high temperatures or dishwashing.
Innovation Solution
A plastic vessel design where the metal element is accommodated in a recess covered by a thermoplastically connected cover, using a meandering structure and pressure to ensure a stable and tight connection, preventing cracks and maintaining magnetic properties, suitable for mass production and decorative use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a metal element is embedded in the plastic vessel during injection molding, then the vessel achieves non-slip positioning capability through magnetic interaction, but cracks occur in the plastic surrounding the metal element due to thermal expansion differences
Solution Approach 1:
The vessel is divided into two separate parts: a plastic vessel element and a cover. The metal element is embedded in the vessel element during injection molding, while the cover is added separately afterward. This segmentation prevents the cover from interfering with the injection molding process and eliminates cracks that would otherwise form around the metal element.
Solution Approach 2:
The vessel element is produced first with the metal element already embedded in it during injection molding. The cover is then added in a subsequent step after the vessel element has cooled and contracted. This preliminary action allows the metal element to be properly positioned without causing defects in the final product.
2Stability of the object's composition
If a metal element is completely embedded by curing plastic during injection molding, then the vessel structure is integrated, but the magnetic remanence of the magnet is considerably demagnetized at temperatures above 300 degrees Celsius
Solution Approach 1:
By separating the vessel into a vessel element and a cover, the metal element can be embedded in the vessel element at lower temperatures during injection molding, avoiding the high temperatures that would demagnetize it. The cover is then attached separately, providing structural completion without exposing the magnet to damaging temperatures.
Solution Approach 2:
The process temperature is controlled to remain below the demagnetization threshold of the metal element. The vessel element is molded at temperatures that do not compromise the magnetic properties, and the cover is attached after cooling, ensuring the magnet retains its remanence while still achieving structural integration.
3Adaptability or versatility
If a metal element is embedded in the plastic vessel, then the vessel achieves functional properties, but the vessel cannot meet aesthetic requirements due to cracks and incomplete surrounding of the metal element
Solution Approach 1:
The vessel is segmented into a vessel element and a cover, where the vessel element contains the embedded metal element and the cover provides the aesthetic finish. This segmentation allows the functional requirements to be met in the vessel element while the cover ensures aesthetic appearance without cracks or visible defects.
Solution Approach 2:
The cover acts as an intermediary between the functional vessel element and the aesthetic requirements. It provides a smooth, crack-free surface that meets aesthetic standards while the vessel element underneath provides the magnetic functionality. The cover effectively mediates between the two conflicting requirements.
4Productivity
If a metal element is embedded during injection molding, then the production process is efficient, but the service life of the vessel is undesirably short due to crack formation
Solution Approach 1:
The vessel production is segmented into two steps: first producing the vessel element with the embedded metal element, then adding the cover. This segmentation eliminates crack formation that would otherwise occur during injection molding, thereby extending the vessel's service life while maintaining production efficiency through a streamlined two-step process.
Solution Approach 2:
The vessel element is produced first with the metal element properly embedded, allowing for subsequent attachment of the cover. This preliminary action ensures that the structural component is formed correctly before the aesthetic cover is added, preventing future cracks and extending the vessel's usable life.
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 solution provides a plastic vessel with a long service life, resistance to external influences, and preserved magnetic properties, suitable for use as a slip-resistant vessel in vehicles and for persons with reduced motor skills, while maintaining aesthetic appeal and allowing cost-effective industrial production.
Implementation Method 1
the cover (2) and the vessel element (1) are connected to one another thermoplastically under the action of pressure
Implementation Method 2
by means of thermal contraction of the vessel element (1) during its cooling and curing
Data Source
AI summary
The invention relates to a plastic vessel comprising a metal element which is accommodated its base, wherein the plastic vessel comprises a vessel element and a cover, such that the plastic vessel is formed in two pieces, wherein a recess is formed in the base of the vessel element, said recess being enclosed by the cover such a that a central closed region of the recess is provided, which accommodates the metal element, and wherein the vessel element and the cover are connected to one another thermoplastically under pressure. Moreover the invention relates to a method for producing a plastic vessel while using the thermoplastic properties of the plastic, and to the use of the vessel in interaction with a suitable means of transport and/or in a vehicle of any kind and/or for the usage by persons with reduced motor skills, perception, attention, and/or as a decorative element.