Plasticizing Device Barrel Nozzle Temperature Control
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Solution Overview
Problem
Existing three-dimensional modeling devices face challenges in stabilizing the extrusion amount of modeling materials containing crystalline and non-crystalline resins due to differing viscosity changes with temperature, making it difficult to apply uniform modeling conditions for both types of resins.
Innovation Solution
A plasticizing device with a nozzle, drive motor, screw, barrel, and heating units, controlled by a unit that reduces the temperature difference between the barrel and nozzle when extruding crystalline resin to maintain consistent viscosity and stabilize extrusion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the nozzle temperature is increased to stabilize the extrusion amount of crystalline resin, then the extrusion stability improves, but the viscosity control becomes more difficult due to the large rate of change in viscosity with temperature
Solution Approach 1:
The heating system is divided into two independent heating zones: a first heating unit for the barrel and a second heating unit for the nozzle. This segmentation allows independent temperature control of each zone, enabling precise management of the temperature difference between barrel and nozzle to stabilize extrusion of crystalline resin while managing viscosity changes
Solution Approach 2:
The invention changes the temperature parameter distribution by maintaining a smaller temperature difference between the barrel and nozzle compared to conventional single-temperature systems. The control unit adjusts the temperatures of both heating units to keep the temperature difference within a specific range, which stabilizes the extrusion amount despite the large viscosity change rate of crystalline resin
2Device complexity
If a single temperature control system is used for both barrel and nozzle, then the device complexity is reduced, but the extrusion amount cannot be stabilized for crystalline resin
Solution Approach 1:
The heating system is divided into two independent heating zones: a first heating unit for the barrel and a second heating unit for the nozzle. This segmentation allows independent temperature control of each zone, enabling precise management of the temperature difference between barrel and nozzle to stabilize extrusion of crystalline resin
Solution Approach 2:
Different temperature conditions are applied to different parts of the system. The barrel and nozzle are heated to different temperatures based on their specific functional requirements, with the nozzle temperature carefully controlled relative to the barrel temperature to optimize the plasticizing and extrusion process for crystalline resin
3Reliability
If the temperature difference between barrel and nozzle is reduced, then the extrusion amount of crystalline resin is stabilized, but the energy consumption increases due to extended heating requirements
Solution Approach 1:
The invention changes the temperature parameter distribution by maintaining a smaller temperature difference between the barrel and nozzle. The control unit manages the temperatures of both heating units to optimize energy usage while keeping the temperature difference within a range that stabilizes extrusion, balancing energy consumption with extrusion stability
Solution Approach 2:
The dual heating units operate continuously to maintain the optimized temperature difference between barrel and nozzle throughout the extrusion process. This continuous temperature management ensures stable extrusion of crystalline resin while the control unit optimizes the heating cycles to minimize energy consumption
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 effectively stabilizes the extrusion amount of crystalline resin, ensuring consistent modeling material output and improving modeling accuracy by controlling the temperature difference between the barrel and nozzle.
Implementation Method 1
a first heating unit configured to heat the modeling material supplied between the groove formed in the groove formation surface and the barrel
Implementation Method 2
a second heating unit configured to heat the modeling material supplied to the nozzle
Implementation Method 3
When the modeling material contains a crystalline resin, the control unit controls at least one of the first heating unit and the second heating unit to reduce a difference between a first temperature corresponding to a temperature of the barrel and a second temperature corresponding to a temperature of the nozzle
Data Source
AI summary
A plasticizing device includes: a nozzle configured to extrude a modeling material; a drive motor; a screw configured to be rotated by the drive motor and including a groove formation surface in which a groove is formed; a barrel including a facing surface facing the groove formation surface and provided with a heater and a communication hole; a first heating unit configured to heat the modeling material supplied between the groove formed in the groove formation surface and the barrel; a second heating unit configured to heat the modeling material supplied to the nozzle; and a control unit configured to control the drive motor, the first heating unit, and the second heating unit. When the modeling material contains a crystalline resin, the control unit controls at least one of the first heating unit and the second heating unit to reduce a difference between a first temperature corresponding to a temperature of the barrel and a second temperature corresponding to a temperature of the nozzle.