Plasticizing Device Rotor Barrel Wear Prevention
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Solution Overview
Problem
Existing plasticizing devices and injection molding apparatuses face durability issues due to wear caused by continuous contact between the rotor and barrel during the plasticization process, leading to reduced performance and lifespan.
Innovation Solution
A plasticizing device design that includes a rotor with a groove forming surface separated from the barrel by a predetermined interval, utilizing a first and second restricting section to prevent contact between the rotor and barrel, thereby preventing wear and maintaining durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the rotor rotates while keeping contact with the barrel during plasticization, then the material can be effectively plasticized, but the rotor and barrel are worn leading to deteriorated durability
Solution Approach 1:
The invention introduces a movable limiting member that can dynamically adjust the gap between the rotor and barrel. The limiting member is positioned such that it restricts the rotor's axial movement, maintaining an optimal gap that prevents contact wear while allowing sufficient material plasticization. This dynamic positioning system resolves the contradiction by enabling effective plasticization without continuous contact between rotor and barrel.
2Productivity
If the rotor and barrel are kept in contact for material plasticization, then plasticization function is maintained, but wear occurs reducing lifespan
Solution Approach 1:
The invention introduces a limiting member as an intermediary element between the rotor and barrel. This limiting member restricts the axial movement of the rotor, maintaining a controlled gap that prevents direct contact between the rotor and barrel surfaces. The intermediary limiting member thus enables material plasticization through the groove structure while preventing wear-induced degradation of the barrel's service life.
3Reliability
If the rotor and barrel are separated to prevent wear, then durability is improved, but plasticization efficiency may be reduced
Solution Approach 1:
The invention optimizes the gap parameter between the rotor and barrel by using a movable limiting member that maintains a specific distance. This controlled separation distance is sufficient to prevent contact wear and improve durability, yet small enough to maintain effective material plasticization through the rotor's groove structure. The parameter optimization resolves the contradiction between durability and plasticization efficiency.
Data Source
AI summary
A plasticizing device includes a driving motor, a rotor rotated around a rotation axis by the driving motor and having a groove forming surface on which a groove is formed, a barrel having an opposed surface opposed to the groove forming surface, a communication hole into which a plasticized material flows being provided in the barrel, a housing section housing the rotor, a first restricting section fixed to the rotor and having a first contact surface facing the barrel side, and a second restricting section fixed to the housing section, opposed to the first contact surface, and having a second contact surface contactable with the first contact surface. Movement of the rotor along the rotation axis is restricted by the first restricting section and the second restricting section. The groove forming surface is separated from the opposed surface at a predetermined interval in a state in which the first contact surface and the second contact surface are in contact.