Resin Pellet Supply Control for Bridge Phenomenon Prevention
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Solution Overview
Problem
The existing plasticizing devices for resin pellets often experience a 'bridge phenomenon' where the pellets interfere and become clogged due to their weight, leading to inadequate supply to the rotor, which hampers the plasticizing process.
Innovation Solution
A plasticizing device equipped with a material storage unit, a coupling pipe, a plasticizing unit, and a control unit that includes sensors to detect the remaining material quantity, triggering the supply of a predetermined amount when the quantity falls below a reference value, thereby preventing clogging and ensuring continuous supply.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If resin pellets are stored in a hopper and supplied to the rotor using gravity, then the structure is simple and easy to operate, but the bridge phenomenon occurs where pellets interfere with each other and become clogged due to their own weight
Solution Approach 1:
A material sensor is installed in the coupling path to detect the remaining quantity of resin pellets. When the sensor detects that the quantity falls below a predetermined threshold, it sends a signal to the control unit, which then activates the material supply mechanism to supplement pellets. This feedback loop ensures continuous material supply and prevents the bridge phenomenon by maintaining adequate pellet levels in the coupling path.
Solution Approach 2:
The material supply mechanism proactively supplies resin pellets to the coupling path before the bridge phenomenon occurs. By monitoring the remaining quantity and triggering supplementation when it falls below the threshold, the system performs preliminary action to prevent clogging rather than reacting after the bridge phenomenon has already occurred.
2Duration of action of moving object
If a large quantity of resin pellets is stored in the hopper, then the operation duration is extended, but the bridge phenomenon becomes more likely due to increased weight and interference
Solution Approach 1:
The material storage system is divided into two segments: the hopper for bulk storage and the coupling path for active supply. The material supply mechanism controls the flow from the hopper to the coupling path, ensuring that only the necessary amount of pellets is present in the coupling path at any given time. This segmentation allows extended operation duration through hopper storage while preventing the bridge phenomenon by limiting the quantity in the coupling path.
Solution Approach 2:
The system dynamically changes the quantity parameter of resin pellets in the coupling path. By monitoring the remaining quantity and supplementing when it falls below the threshold, the system maintains the pellet quantity within an optimal range that prevents the bridge phenomenon while ensuring continuous supply for extended operation duration.
3Stability of the object's composition
If the material supply mechanism continuously supplies resin pellets, then the supply consistency is improved, but the risk of bridge phenomenon increases due to accumulated quantity
Solution Approach 1:
The control unit regulates the material supply mechanism to maintain the resin pellet quantity in the coupling path within a predetermined range. By adjusting the supply rate and stopping supplementation when the threshold is reached, the system achieves consistent supply while preventing excessive accumulation that could cause the bridge phenomenon.
Solution Approach 2:
The material sensor provides continuous feedback on the pellet quantity in the coupling path. This feedback enables the control unit to adjust the material supply mechanism in real-time, ensuring consistent supply by maintaining adequate levels while preventing over-accumulation that would lead to clogging and the bridge phenomenon.
Data Source
AI summary
A plasticizing device includes: a material storage unit having a charging port and configured to store pellet-shaped resin pellets; a plasticizing unit having a supply port in communication with the charging port and configured to plasticize at least a part of the resin pellets to generate a shaping material; a coupling pipe having a coupling path coupling the charging port and the supply port; a first material sensor configured to detect a remaining quantity of the resin pellets in the coupling path; and a control unit. The material storage unit includes a material supply mechanism configured to supply the resin pellets to the coupling path, and when the remaining quantity of the resin pellets detected by the first material sensor is less than a first reference value, the control unit controls the material supply mechanism to supply a predetermined quantity of the resin pellets to the coupling path.