Screen Printing Device Ink Discharge Control
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Solution Overview
Problem
Conventional screen printing devices have complex structures and operations, leading to difficulties in precise control, non-uniform printing quality, and reduced durability due to direct pressure on the screen, along with excessive ink waste and viscosity changes.
Innovation Solution
A screen printing device with a printing unit that discharges ink at preset pressure, using discharge pressure to transfer ink onto the substrate, featuring a controller for adjusting ink discharge and temperature, and a detachable ink discharge part for efficient ink usage and maintenance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a scraper and squeegee are used to apply and print ink on the screen, then the printing process can be performed, but the mechanism structure becomes complicated and precise control becomes difficult
Solution Approach 1:
The patent removes the traditional scraper and squeegee components from the printing system. Instead of using mechanical contact tools to apply and transfer ink, the invention uses a printing head that directly deposits ink onto the substrate through a screen, extracting the unnecessary mechanical complexity while retaining the essential printing function.
Solution Approach 2:
The invention replaces the mechanical scraper-squeegee system with a controlled ink deposition system. The printing head uses controlled movement and ink ejection mechanisms rather than mechanical pressing and scraping, substituting a complex mechanical interaction system with a more controllable deposition process.
2Productivity
If the squeegee pressurizes the screen repeatedly during printing, then ink can be transferred onto the substrate, but plastic deformation occurs in the screen resulting in non-uniform printing quality and reduced durability
Solution Approach 1:
The patent eliminates the squeegee component entirely, removing the source of repeated pressurization on the screen. The ink transfer is achieved through the printing head's controlled deposition and the screen's own structure, rather than through external mechanical pressing, thereby preventing screen deformation and extending screen life.
3Stability of the object's composition
If a large amount of ink is supplied on the screen in advance to maintain viscosity, then the physical property of ink can be maintained, but unnecessary waste of ink occurs and printing quality degrades due to viscosity change exposed in air
Solution Approach 1:
The printing head prepares and holds a small amount of ink in its deposition chamber before actual printing occurs. This preliminary positioning of ink in a controlled environment maintains its physical properties without requiring large quantities to be exposed to air, enabling precise control while minimizing waste.
Solution Approach 2:
The system uses feedback control to monitor ink viscosity and adjust the ink supply to the printing head in real-time. This ensures that only the necessary amount of ink is supplied and maintained at optimal viscosity, preventing both waste and quality degradation from improper ink management.
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
This solution simplifies the printing process, reduces ink waste, improves durability by minimizing screen deformation, and maintains consistent ink viscosity, resulting in higher printing quality and reduced maintenance costs.
Implementation Method 1
a screen printing device capable of efficiently performing a printing process on a substrate through a simpler structure and operation by discharging ink in a required amount for printing at preset pressure and transferring the ink discharged to the screen onto the substrate by discharge pressure of the ink to print a pattern
Data Source
AI summary
Provided is a screen printing device. A screen printing device according to an embodiment of the present invention includes: a screen disposed adjacent to an upper portion of a substrate on which a printing process is performed, and having a pattern to be printed on the substrate; a printing unit disposed on an upper portion of the screen and configured to discharge ink supplied from the outside to the screen and to print the pattern on the substrate; a driver connected to at least one of the screen and the printing unit and configured to drive at least one of the screen and the printing unit; and a controller connected to the printing unit and the driver and configured to control operations of the printing unit and the driver, wherein, when at least one of the screen and the printing device moves in a state in which the printing unit contacts the screen, the controller controls the printing device to perform printing on the substrate by using discharge pressure of the ink.