Spray Nozzle Mist Discharge via Pump Circulation Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing textile printing apparatuses face issues with the initial discharge of pretreatment agents from spray nozzles, resulting in sparse application and potential contamination due to dripping and scattering, as the initial supply pressure is insufficient to produce a mist.
Innovation Solution
A processing liquid discharge device with a pump, valve, and circulation flow path is used to control the supply pressure, ensuring the pretreatment agent is discharged as mist by flowing the liquid through a circulation path before establishing communication with the spray nozzle, maintaining higher pressure for uniform application.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the pump is activated at the timing when the pretreatment agent is applied from the spray nozzle to the printing medium, then the pretreatment agent is supplied to the spray nozzle, but the supply pressure is small at the start and the pretreatment agent is discharged collectively in the form of drip rather than mist
Solution Approach 1:
The pump is activated in advance before the spray nozzle starts discharging the pretreatment agent. This preliminary activation allows the pump to build up sufficient supply pressure in the flow path before the liquid reaches the nozzle, ensuring the agent is discharged as mist rather than drip. The timing control unit coordinates pump activation to occur prior to the discharge timing, resolving the pressure insufficiency issue.
2Manufacturing precision
If the pump is activated early to build up pressure, then the supply pressure is sufficient for mist discharge, but the pump operates unnecessarily before discharge is needed, reducing efficiency
Solution Approach 1:
The system dynamically adjusts the pump operation timing based on the actual discharge requirements. The timing control unit activates the pump only during the period when the spray nozzle is discharging the pretreatment agent, and deactivates it when discharge is complete. This dynamic timing control ensures sufficient pressure for mist discharge while avoiding unnecessary pump operation, thus maintaining both discharge quality and operational efficiency.
3Device complexity
If the pretreatment agent is discharged as drip rather than mist, then the application is sparse and uneven, but the apparatus structure remains simple without additional control mechanisms
Solution Approach 1:
The timing control unit uses feedback from the discharge timing information to control pump activation. By receiving timing signals about when the spray nozzle should discharge and coordinating pump operation accordingly, the system ensures the pump provides sufficient pressure exactly when needed. This feedback-based timing control achieves uniform mist discharge without requiring complex additional hardware, maintaining system simplicity while improving application quality.
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 solution enables efficient mist discharge of the pretreatment agent onto the printing medium, preventing sparse application and contamination, ensuring a uniform base layer for ink adherence.
Implementation Method 1
the supply pressure of the processing liquid is higher than that when the processing liquid is simply supplied to the spray nozzle at the timing of starting to activate the pump
Implementation Method 2
causing the processing liquid to flow from the supply flow path to the circulation flow path
Implementation Method 3
the processing liquid is discharged in the form of mist from the spray nozzle
Data Source
AI summary
A processing liquid discharge device includes: an accommodation unit configured to accommodate a processing liquid; a spray nozzle; a supply flow path for supplying the processing liquid from the accommodation unit to the spray nozzle; a pump; a valve provided in the supply flow path between the spray nozzle and the pump; a circulation flow path including one end being connected to the supply flow path between the valve and the pump, or to the valve, and the other end being connected to the supply flow path between the pump and the accommodation unit, or to the accommodation unit; and a controller that controls the valve to be set in a communication state after activating the pump to cause the processing liquid to flow from the supply flow path to the circulation flow path while controlling the valve to be set in a cut-off state.