Handheld 3D Printing Extrusion Device with PTFE Coating
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing 3D printing technologies, particularly handheld extrusion devices, face challenges in achieving precise control, energy efficiency, and effective heat management, leading to larger and more expensive devices that require complex computer files for operation.
Innovation Solution
The development of a handheld extrusion device with a motor-driven filament-engaging mechanism, a heater for melting the filament, and a control member with pivotal movement to enhance filament control, combined with a heat sink and heater configuration using polytetrafluoroethylene (PTFE) for reduced energy consumption and improved heat dissipation, allowing for continuous extrusion with minimal power input.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a motor-driven filament-engaging mechanism and heater are used for extrusion, then manufacturing precision and reliability are improved, but device complexity and power consumption increase
Solution Approach 1:
The patent combines the motor-driven filament-engaging mechanism and heater into an integrated extrusion assembly, where the motor drives a gear that engages the filament and the heater is positioned adjacent to melt it, creating a compact unit that performs multiple functions (filament feeding and melting) in one structure, thereby improving precision while managing complexity
Solution Approach 2:
The control member serves multiple functions: it guides filament movement, applies pressure to control extrusion rate, and acts as a thermal management component. This multi-functionality reduces the need for separate components, improving extrusion precision without proportionally increasing device complexity
2Manufacturing precision
If a heater is used to melt the filament, then manufacturing precision is improved, but energy consumption and heat management become problematic
Solution Approach 1:
The patent implements periodic heating cycles where the heater is activated only when filament melting is required, rather than continuous heating. The control system monitors extrusion needs and cycles the heater on and off accordingly, reducing overall energy consumption while maintaining the precision needed for controlled extrusion
Solution Approach 2:
The heater temperature and power output are dynamically adjusted based on real-time extrusion requirements. The system changes heating parameters (temperature, power level, duration) to match the immediate needs of filament melting and extrusion, minimizing energy waste while preserving manufacturing precision
3Ease of operation
If the control member is made movable for filament control, then ease of operation is improved, but device complexity increases
Solution Approach 1:
The control member is designed to be movable rather than fixed, allowing it to dynamically adjust its position and apply variable pressure on the filament. This dynamic capability enables users to easily control filament feed rate and extrusion characteristics by simply moving the control member, improving ease of operation without requiring complex mechanical systems
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 enables precise control and efficient operation of the extrusion device, reducing energy consumption and heat management issues, allowing for the creation of 3D items with a compact, user-friendly, and cost-effective handheld device capable of continuous extrusion with low power input.
Implementation Method 1
the heater configured to melt the filament
Implementation Method 2
the heater configured to melt the filament
Implementation Method 3
a heat sink having a passage therethrough; a heater having a passage therethrough; a tube having a first portion coupled with the heat sink, and a second portion coupled with the heater
Implementation Method 4
a heat sink having a passage therethrough
Implementation Method 5
at least a portion of an inside surface of the tube comprises polytetrafluoroethylene (PTFE) or a material having a PTFE-based formula
Data Source
AI summary
An extrusion device includes a filament-engaging mechanism that urges a filament, received by the device, through a heater and a nozzle. A moveable control member can be manipulated by a user during operation of the device to alter a rate of extrusion. The extrusion device can have a continuous flow mode of operation. The extrusion device can be configured to operate with low electrical power consumption.