3D Shaping Device Hopper Bridging Prevention
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Solution Overview
Problem
Three-dimensional shaping devices face issues with material bridging in the hopper due to the weight of pellets, leading to clogging and inadequate supply to the plasticization unit.
Innovation Solution
A three-dimensional shaping device with a material storage unit featuring a cylindrical body and a mouth portion with a smaller diameter hole, equipped with sensors for remaining state detection and a control unit that adjusts material supply to maintain an optimal height, preventing bridging by ensuring the material level is above a reference value.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If material is stored in the hopper, then the material supply to the plasticization unit is ensured, but the weight of the material causes bridging and clogging at the hopper exit
Solution Approach 1:
The system performs preliminary detection of the material level in the hopper and proactively supplies additional material before bridging occurs. The control unit monitors the material level and triggers material supply when the level reaches a predetermined threshold, preventing the harmful bridging phenomenon before it develops.
Solution Approach 2:
The system implements a feedback mechanism where the material level in the hopper is continuously detected and fed back to the control unit. Based on this feedback information, the control unit automatically adjusts the material supply operation to maintain optimal material levels and prevent bridging, creating a closed-loop control system.
2Quantity of substance
If material is continuously supplied to the hopper, then the material level is maintained, but excessive material storage increases the risk of bridging
Solution Approach 1:
The system changes the parameter of material quantity dynamically by supplying material only when the level drops below a predetermined threshold. This parameter change approach maintains material level within an optimal range, avoiding both excessive storage that causes bridging and insufficient material that disrupts plasticization.
3Duration of action of moving object
If the hopper is filled to maximum capacity, then material supply duration is extended, but the weight causes material to interfere and clog
Solution Approach 1:
The system performs preliminary detection of the material level and triggers material supply before the hopper becomes empty or develops bridges. This proactive approach ensures continuous material supply duration by preventing interruptions caused by bridging, rather than waiting for problems to occur.
Solution Approach 2:
The feedback mechanism continuously monitors material level and automatically controls material supply operations. This closed-loop control extends material supply duration by maintaining optimal material levels and preventing bridging-induced interruptions through real-time adjustments.
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
Prevents material bridging and ensures consistent supply to the plasticization unit, maintaining efficient operation and preventing clogging.
Implementation Method 1
a detection unit configured to detect a remaining state of the material stored in the material storage unit
Data Source
AI summary
A three-dimensional shaping device includes: a material storage unit and a mouth portion which is provided below the body portion and which has a hole with a diameter smaller than a maximum inner diameter of the body portion, a material supply unit configured to supply a material to the material storage unit, a melting unit configured to melt the material supplied through the mouth portion, a nozzle configured to discharge the shaping material toward a stage, a remaining state detection unit configured to detect a remaining state of the material, a remaining amount determination unit configured to determine whether a remaining amount of the material is less than a first reference value based on the remaining state, and a control unit configured to supply, when the remaining amount is less than the first reference value, the material to the material storage unit.