Helical Liquid Cooling for 3D Printer Extruders
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Solution Overview
Problem
Conventional air and water cooling methods for 3D printer extruders are inefficient, especially at high temperatures and in heated environments, limiting heat transfer and affecting the extrusion process.
Innovation Solution
A liquid cooling method using a helical flow of coolant from the bottom to the top of the cold end, enhancing heat transfer efficiency and maintaining the printing material below the melting temperature, while recycling the coolant for optimal conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If air cooling is used to cool the cold end, then the cooling system is simple, but the heat transfer efficiency is low and ineffective at high temperatures
Solution Approach 1:
The patent transitions from air cooling to liquid cooling by introducing a coolant pump and liquid coolant circulation system. The liquid coolant flows through channels in the cold end block, providing superior heat transfer efficiency compared to air cooling, especially at high temperatures above 260°C.
Solution Approach 2:
The patent changes the cooling medium from gas (air) to liquid (coolant), fundamentally altering the thermal conductivity and heat capacity parameters. This parameter change enables effective heat removal at high extrusion temperatures where air cooling becomes inadequate.
2Loss of energy
If water cooling is used to cool the cold end, then the heat transfer efficiency is improved, but the cooling effectiveness decreases in heated environments
Solution Approach 1:
The patent incorporates temperature sensors that monitor the temperature of the cold end block and provide feedback to the control system. Based on this feedback, the system adjusts the coolant flow rate or pump operation to maintain optimal cooling effectiveness even in heated ambient environments, preventing the cold end from absorbing excessive heat.
Solution Approach 2:
The cooling system transitions from a static water flow arrangement to a dynamic liquid cooling system with a controllable pump. The pump can adjust coolant flow rates in real-time based on operating conditions, enabling the system to adapt to heated environments and maintain reliable cooling performance.
3Device complexity
If conventional cooling methods are used, then the system is simple, but the deposition rate is limited and pressure requirements are high
Solution Approach 1:
The liquid cooling system with controlled coolant flow creates more stable thermal conditions in the extruder, allowing for higher deposition rates. The efficient heat removal prevents material degradation and maintains consistent material properties, enabling faster printing without increasing pressure requirements excessively.
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 method allows for higher extrusion temperatures, faster deposition rates, and reduced pressure requirements, minimizing nozzle choking and maintaining cooler core temperatures even in elevated ambient conditions, thus improving the overall efficiency and cost-effectiveness of the 3D printing process.
Implementation Method 1
effectively cooling the printing material in the cold end with the liquid coolant by promoting a helical flow
Implementation Method 2
promoting a helical flow with the inlet in the bottom zone and outlet in the top
Data Source
AI summary
A method for manufacturing an object by a dispenser is provided herein. The method includes feeding printing material to a printer. The method further includes receiving a liquid coolant from a coolant source. The method further includes cooling the printing material with the liquid coolant in a helical geometry of a core. The method further includes heating the printing material by a heat source. The method further includes dispensing the printing material for printing by the dispenser.