Screw Groove Supply Path for Stable Plasticization
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing plasticization feeders face instability in plasticization due to material interference with the rotor's outer circumferential surface, leading to rotor rotation issues.
Innovation Solution
A plasticizing device with a screw having a groove formation surface and a barrel with a communication hole, where a supply path and a through hole allow material to be efficiently supplied to the groove, preventing material entry into the rotor's outer surface and ensuring stable rotation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If material is supplied to the supply port when the rotor rotates one revolution and the supply port and feed port overlap, then material supply is achieved, but mashed material enters between the outer circumferential side surface of the rotor and the case, interfering with rotor rotation
Solution Approach 1:
The invention extracts the problematic overlap between supply port and feed port by introducing a timing control mechanism. The supply port is positioned to communicate with the feed port only during specific rotational phases, preventing simultaneous alignment that causes material leakage. This separates the material supply function from the harmful material escape path.
Solution Approach 2:
The invention implements preliminary positioning of the supply port relative to the feed port based on predicted rotor position. By pre-configuring the angular relationship between supply port and feed port, the system ensures that material supply occurs only when the rotor is in the correct rotational phase, preventing premature or improper material discharge that would cause interference.
2Volume of moving object
If a rotor with helical groove is used in place of a screw, then downsizing of injection molding machine is achieved, but stable plasticization becomes difficult due to material interference
Solution Approach 1:
The invention applies local quality by creating a specialized communication zone between the supply port and feed port with specific geometric characteristics. This localized structural feature ensures proper material flow control at the critical interface, while the rest of the rotor maintains its compact helical groove design for size reduction.
Solution Approach 2:
The invention introduces dynamic control of material supply timing based on rotor rotation phase. The supply port's communication with the feed port is made conditional on rotational position, transforming a static structural problem into a dynamically controlled process that maintains stability despite the compact rotor design.
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 device achieves stable plasticization performance by preventing material interference and ensuring efficient material supply, enhancing the stability and efficiency of the plasticization process.
Implementation Method 1
a heater heating the material supplied to between the groove formation surface and the opposed surface
Data Source
AI summary
A plasticizing device includes a screw having a groove formation surface with a groove and rotating around a rotation axis, a barrel having an opposed surface opposed to the groove formation surface in a direction along the rotation axis, with a communication hole for the plasticization material, a heater heating the material supplied, and a case housing the screw, wherein a first through hole communicating with the groove from an opposite surface to the groove formation surface and surrounded by a wall surface is formed in the screw, the material is supplied to the groove through a supply path and the first through hole, and a space is provided between an entrance of the first through hole and a material feed port provided in a terminal end portion closer to the screw of a terminal end of the supply path in the direction along the rotation axis.