3D Printer Print Head With Circumferential Heating for Faster Heat-Up
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Solution Overview
Problem
Existing 3D printer print heads take too long to heat up, leading to inefficiencies in the printing process and potential dripping of liquid material from the nozzle.
Innovation Solution
The print head design features a pipe seated in an annular bracket with spring contacts at opposite points, allowing heating current to flow over the entire circumference of the pipe, and includes a heating resistor layer that can cover the entire circumference or have a longitudinal gap bridged by a conductor strip, with the pipe and nozzle manufactured as a single piece for improved heat distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If a heating resistor layer covers only part of the pipe circumference (e.g., in the form of conductor tracks), then the device complexity is reduced and manufacturing is easier, but the heating speed and heating coverage are insufficient
Solution Approach 1:
The patent merges multiple heating zones into a single continuous heating structure. The heating resistor layer is applied continuously around the entire circumference of the pipe, combining what would otherwise be separate heating segments into one unified system. This is achieved by applying the heating layer in a continuous process rather than installing discrete conductor tracks, thereby increasing heating coverage and speed while maintaining manufacturing simplicity.
Solution Approach 2:
The heating resistor layer is designed to provide continuous heating action around the entire pipe circumference. By ensuring the heating layer is continuous and uninterrupted (with gaps smaller than 10% of the circumference), the system maintains constant thermal input to the pipe, eliminating heating dead zones and improving overall heating efficiency and speed.
2Ease of manufacture
If the pipe and nozzle are manufactured separately and connected during assembly, then manufacturing flexibility is improved, but manufacturing costs and heat distribution are worsened
Solution Approach 1:
The patent merges the pipe and nozzle into a single integrated component manufactured as one piece. This eliminates the need for assembly operations between separate parts, reducing manufacturing complexity and improving thermal continuity. The unified structure ensures consistent heat distribution from the heating layer through the pipe wall into the nozzle, eliminating thermal resistance at joint interfaces.
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
Faster heating of the print head enables quicker printing with reduced dripping, enhancing precision and efficiency.
Implementation Method 1
Print heads with a pipe carrying a heating resistor layer enable plastic material to be melted very quickly
Implementation Method 2
heating current can flow from one spring contact to the opposing spring contact over two different circumferential halves each. The pipe of a print head according to the invention can thus be heated over a larger part of its circumference or even over its entire circumference
Data Source
AI summary
A print head for a 3D printer includes a nozzle for dispensing molten material. A pipe is connected to the nozzle and carrying a heating resistor layer. The pipe is seated in an annular bracket. Spring contacts are mounted on the bracket, which contacts bear against the pipe at mutually opposite points and contact the heating resistor layer.