Spherical Rotation Device for Rotational Molding Energy Reduction
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Solution Overview
Problem
Conventional rotational molding units require significant space and energy due to their design, making them costly and inefficient for smaller production volumes and requiring substantial energy for mold movement, limiting their suitability for individual production runs.
Innovation Solution
A rotation apparatus featuring a spherical receiving apparatus with a holding apparatus and drive unit that allows for efficient rotation using minimal technical outlay, enabling rapid and economical product line changes, with adjustable support elements and a drive system that facilitates comprehensive rotation directions and heat transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If a conventional rotary arm design with pivot radius is used for rotational molding, then the mold can be rotated, but the apparatus requires great space and high energy expenditure
Solution Approach 1:
The receiving apparatus is designed as a sphere instead of a conventional rotary arm structure. This spherical design allows the mold to be rotated around a fixed central point without requiring a large pivot radius, thereby reducing both the space occupied by the apparatus and the energy needed for rotation while maintaining effective mold movement for rotational molding
Solution Approach 2:
The complex mechanical rotary arm system with pivot joints is replaced by a simpler spherical receiving apparatus that rotates around a fixed axis. This substitution eliminates the need for complex pivot mechanisms and reduces the mechanical complexity, leading to lower energy consumption and smaller footprint
2Productivity
If a conventional rotary arm design is used, then mold rotation is achieved, but the unit is costly and unsuitable for small production volumes
Solution Approach 1:
The receiving apparatus is segmented into a spherical structure that can accommodate different molds, allowing flexible adaptation to various production requirements. This segmentation enables the system to be configured for small production runs without requiring a complete redesign, reducing the barrier to entry for small-volume manufacturers
Solution Approach 2:
The spherical receiving apparatus allows for easy change of parameters such as mold type, rotation speed, and rotation axis orientation. This flexibility enables the same apparatus to be used for different production volumes and product types, making it economically viable for small production runs while maintaining low 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 solution reduces energy costs and resource usage, enhances operational reliability, and allows for quick mold changes and efficient production of small quantities of rotationally molded objects with reduced mechanical complexity and energy expenditure.
Implementation Method 1
the drive wheel being in energy-transferring contact with the sphere in a manner causing rotary motion of the sphere
Implementation Method 2
The separating and guiding medium is advantageously introduced by means of pressure, by means of at least one control nozzle, into the interstice between the shell surface and the surface of the spherical receiving apparatus
Implementation Method 3
Rotation of the sphere is assisted by the guidance mounts in that they are embodied, for example, as rolling bearings movable in all axes
Data Source
AI summary
A rotation apparatus for rotationally molded shaped objects includes a receiving apparatus for receiving at least one negative mold, a holding apparatus for holding the receiving apparatus, and a drive unit for driving rotary motion of the receiving apparatus, wherein the receiving apparatus (1) is embodied as a sphere. The holding apparatus includes at least one support and guidance element (5) for supporting and guiding the receiving apparatus. The drive unit includes a drive element (9) that is arranged in the rotation apparatus and is connected in energy-transferring fashion to the receiving apparatus (1) to cause the sphere to rotate.