Extruder Screw Speed Control via Discharge Element Coupling
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing manufacturing devices for extrusion-based production of three-dimensional components face challenges in accurately and dynamically controlling the operation, particularly due to inertia and accuracy issues related to pressure deviations in the extrusion unit.
Innovation Solution
A procedure that sets the speed of the extruder snail based on the speed of the output unit, using a predefined coupling to directly link the speed of the extruder snail with the output unit, enabling dynamic and precise control of the manufacturing device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If pressure-based control is used in the extrusion unit, then the control accuracy can be improved, but the response speed and dynamic control capability deteriorate due to inertia and difficulty in locating the pressure source
Solution Approach 1:
The patent replaces the mechanical pressure-based control system with an electronic control system that directly measures and responds to pressure deviations. Pressure sensors are integrated into the extrusion unit to detect pressure changes, and this information is electronically transmitted to the control device, which then adjusts the extruder screw speed accordingly. This substitution of mechanical feedback with electronic sensing and control enables both high measurement precision and fast response speed, resolving the contradiction between accurate pressure-based control and dynamic response capability.
2Manufacturing precision
If the control system responds to pressure deviations, then the manufacturing precision can be improved, but the control inertia increases making it difficult to quickly locate and correct the source of deviation
Solution Approach 1:
The patent implements a closed-loop feedback control system where pressure sensors continuously monitor pressure deviations in the extrusion unit and immediately transmit this information to the control device. The control device processes this feedback and automatically adjusts the extruder screw speed to correct the deviation. This real-time feedback mechanism enables both high manufacturing precision through continuous monitoring and fast response time by eliminating manual intervention and directly linking pressure detection to control adjustment.
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 approach allows for less sluggish and more precise control of the manufacturing device, as speed changes in the output unit can be directly adapted to pressure changes in the extruder snail, improving the accuracy and efficiency of the extrusion process.
Implementation Method 1
an extrusion unit for melting an extrusion material with an extruder screw
Implementation Method 2
melting an extrusion material with an extruder screw that can be driven rotatably
Implementation Method 3
drive units (23, 34) assigned to the extruder screw (22) and to the at least one dispensing element (33), in particular in the form of motors, in particular of electric motors
Data Source
Figure 1
Figure 2
Figure 3
AI summary
Method for controlling and/or regulating the operation of a manufacturing device for the extrusion-based additive manufacturing of a three-dimensional component by means of a hardware- and/or software-implemented control and/or regulating device, wherein the manufacturing device comprises an extrusion unit for melting an extrusion material with an extruder screw rotatably driven about a rotary axis and a discharge unit arranged downstream of the extrusion unit for discharging molten extrusion material onto a substrate with at least one discharge element rotatably driven about a rotary axis, wherein the control and/or regulating device sets the rotational speed of the extruder screw based on the rotational speed of the at least one discharge element.