Powder Hopper Docking Handle for Tolerance-Stable Dispensing
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Solution Overview
Problem
Current docking arrangements for additive manufacturing processes lack a reliable and automated method for controlling the dispensing of powders from hoppers to additive manufacturing machines, leading to issues with stability, environmental control, and operator intervention requirements.
Innovation Solution
An operating handle with a rotatable shaft and lever mechanism, coupled with an actuator engagement member, allows for controlled dispensing of materials by engaging and disengaging a rotation retention mechanism, enabling automated or manual operation and maintaining environmental seals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual control of powder dispensing is used, then operator intervention is possible, but the operator must physically interact with the hopper which is out of reach and unstable
Solution Approach 1:
An actuator engagement member is provided on the operating handle as an intermediary element that extends axially outwards from the handle. This engagement member allows an actuator to act on the handle without requiring direct physical access to the hopper, solving the accessibility problem while maintaining control capability.
2Extent of automation
If automated actuation is implemented, then manual intervention is reduced, but the docking position tolerance issues prevent reliable actuation
Solution Approach 1:
The actuator engagement member serves as a mediator between the actuator and the operating handle, providing a reliable interface for automated actuation that is not affected by docking position tolerances. The axial extension design ensures consistent engagement regardless of minor positioning variations.
Solution Approach 2:
The engagement member is pre-positioned on the operating handle before docking occurs. This preliminary positioning ensures that when the hopper is docked, the actuator can immediately and reliably engage with the engagement member without requiring precise alignment, thus accommodating docking tolerances.
3Productivity
If the hopper is docked to the additive manufacturing machine, then material delivery is enabled, but tolerance issues prevent stable coupling and environmental sealing
Solution Approach 1:
The actuator engagement member provides a universal interface that serves multiple functions: it enables automated actuation of the operating handle, accommodates docking position tolerances, and maintains the stability required for reliable material delivery and environmental sealing between the hopper and machine.
Data Source
AI summary
The invention relates to an operating handle for controlling the operational state of a valve arrangement associated with a container to control dispensing of material from the container to a component of an additive manufacturing process, the operating handle comprising a rotatable shaft coupled to the valve arrangement, the shaft being rotatable between a plurality of angular positions corresponding to one or more operational states of the valve arrangement; a lever operatively coupled to the shaft and configured to cause rotation of the shaft between the plurality of angular positions upon rotation of the lever; a rotation retention mechanism configured to retain the lever in one of a plurality of rotational positions; and an actuator engagement member extending axially outwards from the handle, wherein an actuator provided as part of a docking arrangement associated with the component is operable to act on the actuator engagement member for engaging and disengaging the rotation retention mechanism.