Plasticizing Rotor Eccentricity Stabilization via Elastic Coupling
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Solution Overview
Problem
Existing plasticizing devices face instability in rotor rotation due to uneven material distribution and spring bias, leading to potential eccentricity and unstable plasticization in three-dimensional molding and injection molding processes.
Innovation Solution
A plasticizing device design featuring a rotor with a groove-formed surface inclined from the rotation shaft, a facing unit with an inclined surface, a heater, a drive motor, a connection unit, and an elastic member between the rotor and the connection unit, which stabilizes rotor rotation by allowing posture correction through elastic deformation and guiding the groove-formed surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stress or pressure
If a spring is used to adjust material pressure in the spiral flow path, then material pressure control is improved, but rotor rotation stability deteriorates due to eccentricity caused by uneven material distribution
Solution Approach 1:
The invention extracts the spring mechanism from the rotor assembly and relocates it to the drive shaft assembly. This separation removes the source of eccentricity (spring displacement affecting rotor position) while preserving the material pressure adjustment function through the drive shaft's axial displacement mechanism
Solution Approach 2:
The invention introduces a belt coupling mechanism as an intermediary between the drive shaft and rotor. This belt transmission system allows independent motion of the drive shaft and rotor, enabling the drive shaft to adjust material pressure through axial displacement without transmitting this displacement to the rotor, thus maintaining rotor rotation stability
2Stress or pressure
If the disk is displaced along the rotation axis to adjust material pressure, then material pressure control is improved, but rotation stability deteriorates due to eccentricity
Solution Approach 1:
The invention segments the pressure adjustment function from the rotor assembly by implementing it in the drive shaft assembly. The drive shaft can displace axially to adjust material pressure independently, while the rotor maintains its rotational function without displacement-induced eccentricity
Solution Approach 2:
The invention transitions the pressure adjustment mechanism from radial/displacement-based (affecting rotor position) to axial-based (affecting drive shaft position). By moving the displacement adjustment to the axial dimension of the drive shaft rather than the rotor, the system achieves pressure control without compromising rotational precision
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 ensures stable rotation and plasticization of materials, reducing the risk of rotor eccentricity and enhancing the consistency and accuracy of the molding process.
Implementation Method 1
allowing posture correction through elastic deformation
Implementation Method 2
a heater heating a material to be supplied between the facing surface and the groove
Data Source
AI summary
A plasticizing device includes a rotor having a rotation shaft and a groove-formed surface that includes a groove formed in the rotation direction and that inclined from the rotation shaft in a radial direction with respect to a radial direction orthogonal to the center axis, a facing unit having a facing surface inclined so as to face the groove-formed surface in the radial direction, a heater heating a material to be supplied between the facing surface and the rotor, and a communication hole through which the material plasticized by heat of the heater flows, a drive motor generating rotational driving force, a connection unit fitting to the rotor in a direction along a rotation shaft of the drive motor, connecting the rotation shaft of the drive motor and the rotor to each other, and transmitting the rotational driving force of the drive motor to the rotor, and an elastic member disposed between the rotor and the connection unit.