Liquid-Cooled 3D Printer Dispenser for Cold End Heat Control
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Solution Overview
Problem
Conventional air and water-cooled extruders are inefficient in maintaining the cold end temperature of 3D printers, especially at high temperatures and in heated environments, leading to ineffective cooling and material degradation.
Innovation Solution
A liquid-cooled dispenser with a hot end portion for melting material and a cold end portion using a helical core and casing for efficient heat transfer, utilizing a liquid coolant to maintain the cold end temperature below the melting point.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If air cooling is used to cool the cold end, then the structure is simple, but the cooling efficiency is insufficient especially at high temperatures
Solution Approach 1:
The patent transitions from air cooling to liquid cooling by introducing a coolant circulation system with pump, reservoir, and cooling channels. The liquid coolant absorbs heat more effectively than air, resolving the insufficient cooling efficiency while maintaining system simplicity through integrated cooling manifolds.
Solution Approach 2:
The patent changes the cooling medium from gas (air) to liquid (coolant), fundamentally altering the heat transfer parameter. Liquid coolant provides higher specific heat capacity and thermal conductivity, enabling effective cooling at high temperatures where air cooling fails.
2Reliability
If conventional water cooling is used, then cooling capacity increases, but the system becomes ineffective in high ambient temperatures
Solution Approach 1:
The patent incorporates temperature sensors and controllers that monitor the cold end temperature and ambient conditions, adjusting coolant flow rate and pump operation dynamically. This feedback mechanism maintains effective cooling capacity across varying ambient temperatures, preventing the cold end from absorbing heat from the environment.
Solution Approach 2:
The cooling system transitions from static conventional water cooling to a dynamic controlled liquid cooling system. The pump speed, coolant flow rate, and cooling channel activation are dynamically adjusted based on real-time temperature measurements, enabling adaptability to heated environments while maintaining cooling capacity.
3Reliability
If the cold end is cooled to ambient temperature, then cooling is sufficient for low temperature applications, but material degradation occurs at high extrusion temperatures
Solution Approach 1:
The patent implements differential temperature control by creating distinct thermal zones: the cold end is actively cooled to maintain low temperature for material feeding, while the hot end operates at high temperature for extrusion. The cooling system selectively targets the cold end region, allowing the hot end to reach higher temperatures without material degradation.
Solution Approach 2:
The extruder is divided into functionally separate thermal zones with independent temperature control. The cold end portion handles material feeding at low temperature, while the hot end portion performs extrusion at high temperature. The liquid cooling system segments the cooling function to specifically protect the cold end, enabling higher overall extrusion temperatures.
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 liquid-cooled dispenser achieves effective cooling, allowing higher extrusion temperatures, faster deposition rates, and reduced material degradation, even in high ambient temperatures, while minimizing nozzle choking and maintaining efficient heat transfer.
Implementation Method 1
a cold end portion (104) configured to cool down temperature of the printing material
Implementation Method 2
utilizing a liquid coolant to maintain the cold end temperature below the melting point
Data Source
AI summary
A dispenser (100) for manufacturing an object is provided herein. The dispenser (100) includes a material feed portion (108) configured to provide a printing material. The dispenser (100) further includes a cold end portion (104) configured to cool down temperature of the printing material. The system further includes a coolant source (304) configured to use a liquid as coolant and provide cooling to the printing material. The dispenser (100) further includes a hot end portion (102) configured to convert printing material into a molten form and output the printing material for printing via a dispenser outlet (116).