Plasticizing Device Temperature Segmentation for Stable Feed-Out
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Solution Overview
Problem
Existing plasticizing devices face instability in the feed-out amount of molding material due to uneven fluidity between the central and outer circumferential portions of the rotor, leading to inconsistent conveyance and molding processes.
Innovation Solution
The plasticizing device employs a barrel with a heating and cooling system that controls temperature regions around the communication hole, maintaining lower fluidity in the outer circumferential portion and higher fluidity in the central portion by using distinct heating and refrigerant circulation zones, ensuring stable feed-out of the shaping material.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If uniform heating is applied across the entire barrel, then the material is充分 plasticized, but the fluidity becomes uniform throughout the rotor, causing unstable feed-out of molding material
Solution Approach 1:
The barrel heating system is segmented into multiple independent heating zones (first heating zone, second heating zone, third heating zone) with different temperature settings. The first heating zone maintains lower temperature to keep outer circumferential material fluidity low, while the second and third heating zones provide higher temperatures to ensure sufficient plasticization in the central region. This segmentation allows differential temperature control without requiring a completely complex system architecture.
Solution Approach 2:
Different regions of the barrel are assigned different temperature qualities to achieve different material fluidity characteristics. The first heating zone (outer region) uses lower temperature to maintain low fluidity for stable conveyance, while the second and third heating zones (inner/central regions) use higher temperatures to ensure adequate plasticization. This local differentiation of thermal properties directly addresses the fluidity control requirement.
2Force
If the fluidity of material in the outer circumferential portion of the rotor is kept low to obtain conveyance force, then material conveyance toward the center is improved, but the feed-out amount of molding material becomes unstable if this fluidity control is not maintained
Solution Approach 1:
The temperature parameter is changed differently across various heating zones to control material fluidity. The first heating zone operates at a lower temperature parameter to maintain low fluidity in the outer circumferential region, generating sufficient conveyance force. The second and third heating zones operate at higher temperature parameters to ensure proper plasticization in the central region, thereby stabilizing the feed-out amount of molding material.
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 configuration stabilizes the feed-out amount of the shaping material by controlling fluidity, enhancing the consistency and efficiency of the molding process while maintaining a simple device configuration.
Implementation Method 1
a first heating portion (71) and a second heating portion (72) disposed in the barrel (50)
Implementation Method 2
a refrigerant flow path (76) disposed in the barrel (50) along a circumferential direction of the barrel (50) farther from the communication hole (56) than the first heating portion (71)
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
A plasticizing device (90) for a three-dimensional shaping apparatus includes a drive motor (32), a rotor (40) that is rotated by the drive motor and has a groove formed face (48) with a groove (42) formed therein, a barrel (50) that is opposed to the groove formed face and has a communication hole (56), a heating portion (70) that heats a material in a pellet form supplied between the groove and the barrel, and a control unit (500) that controls the drive motor and the heating portion so as to plasticize the material supplied between the groove and the barrel and cause the material to flow out from the communication hole. The heating portion has a first (71) and a second (72) heating portion disposed closer to the communication hole than the first heating portion, and the barrel has a first region (RG1) and a second region (RG2) that is closer to the communication hole than the first region. The control unit individually controls the first and second heating portions so that a temperature of the second region is higher than that of the first region.