3D Printer Door Lock Structure for Powder Containment
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Solution Overview
Problem
Three-dimensional printing generates a large amount of powder during the coloring process, which is discharged into the environment when the printer door is opened, causing pollution before the powder is reduced to an acceptable level.
Innovation Solution
A door lock structure for three-dimensional printers that keeps the door panel closed until the powder inside the housing is drawn away, using an actuator, exhaust fan, and controller to manage the locking and unlocking of the door panel, ensuring powder is contained within the printer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the door panel is opened during or shortly after coloring printing, then the operator can access the chamber, but powder is discharged to the ambient environment causing pollution
Solution Approach 1:
The exhaust fan operates for a predetermined time after the coloring nozzle stops to draw powder away from the chamber before the door lock releases. This preliminary action of powder removal precedes the door opening, preventing harmful discharge while maintaining operational convenience.
Solution Approach 2:
The door lock structure acts as an intermediary between the operator and the chamber. It mediates door access by preventing opening until the exhaust fan has sufficiently removed the powder, thus blocking the harmful effect while allowing the useful function of door access when safe.
2Object-generated harmful factors
If the door panel is kept locked after coloring printing, then powder discharge is prevented, but the operator cannot access the chamber for maintenance or removal of printed objects
Solution Approach 1:
The system performs preliminary powder removal via the exhaust fan before unlocking the door. This ensures that when the door becomes accessible, the harmful powder has already been drawn away, satisfying both safety and accessibility requirements.
Solution Approach 2:
The door lock structure transitions from a static locked state to a dynamic state where it automatically unlocks after the predetermined time interval. This dynamic behavior allows the system to adapt between preventing powder discharge and enabling door access based on the printing cycle stage.
3Object-generated harmful factors
If the exhaust fan operates continuously, then powder is effectively drawn away, but energy consumption increases
Solution Approach 1:
The exhaust fan operates periodically rather than continuously - specifically, it runs during the coloring printing process and for a predetermined time afterward, then stops. This periodic operation maintains effective powder removal while reducing unnecessary energy consumption during idle periods.
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 powder from being discharged outside the printer, maintaining good ambient air quality by ensuring the door remains closed until the powder is adequately reduced, thereby minimizing environmental pollution.
Implementation Method 1
The exhaust fan structure is used to draw air from the housing and discharge the air to the outside of the housing
Implementation Method 2
The door lock structure includes a locking position and an unlocking position... drives the door lock structure to lock or unlock the door panel
Data Source
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AI summary
A 3D printer (10) having a door lock structure (4) includes a housing (1), a door panel (2), a door lock structure (4), a coloring nozzle set (62), an actuator (5), and a controller (8). The door panel (2) is pivotally connected to the housing (1). The door lock structure (4) is arranged corresponding to the door panel (2) and has a locking position and an unlocking position. The actuator (5) is connected to the door lock structure (4) and drives the door lock structure (4) to lock or unlock the door panel (2). The controller (8) is electrically connected to the actuator (5). The controller (8) controls the actuator (5) to drive the door lock structure (4) to the locking position. The controller (8) activates an unlocking mode after a predetermined time after the coloring nozzle set (62) stops operating. In the unlocking mode, the controller (8) controls the actuator (5) to drive the door lock structure (4) to the unlocking position.