Printing Machine Dryer Unit Gas Flow Optimization
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing dryer units in printing machines have limited drying performance, which restricts the speed of sheet material processing and may damage the material or ink due to temperature, pressure, and volume flow rate constraints, necessitating an enhancement in drying efficiency without adverse effects on the sheet material or ink.
Innovation Solution
The dryer unit incorporates additional dryer gas output slots upstream, offset and inclined relative to the width direction, along with a second set of output openings downstream, and gas suction openings to optimize gas flow and distribution, increasing the volume flow rate without increasing pressure or temperature, ensuring effective and precise drying.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the volume flow rate of dryer gas is increased to enhance drying performance, then drying efficiency improves, but the pressure and temperature of the dryer gas increase which may damage the sheet material or ink
Solution Approach 1:
The dryer gas output is divided into two types of openings: dryer gas output openings arranged in a regular pattern and dryer gas output slots arranged upstream in an irregular pattern. This segmentation allows the system to deliver dryer gas through multiple pathways with different characteristics, increasing total volume flow rate while maintaining lower individual opening pressure and temperature to avoid damaging the sheet material or ink
Solution Approach 2:
The invention introduces dryer gas output slots that are offset and inclined relative to the width direction, adding a dimensional component to the gas delivery system. This three-dimensional arrangement of gas output openings and slots increases the effective application area and volume flow rate distribution without concentrating pressure or temperature at any single location, thereby enhancing drying performance without damaging the material
2Productivity
If the temperature and pressure of dryer gas are increased to improve drying speed, then drying performance enhances, but the sheet material and ink are damaged
Solution Approach 1:
By segmenting the gas output into multiple openings and slots distributed across the dryer body, the system can maintain lower individual opening pressure and temperature while achieving higher overall drying throughput through cumulative effect of multiple gas delivery points
Solution Approach 2:
Different regions of the dryer body have different gas output characteristics - the regular pattern openings provide uniform distribution while the irregular pattern slots provide targeted gas flow. This local differentiation allows optimized drying at each location without subjecting any single area to excessive temperature or pressure that would damage the material
3Productivity
If dryer gas is applied at high volume flow rate to increase productivity, then drying performance improves, but the complexity of the dryer unit increases
Solution Approach 1:
The dryer unit is segmented into multiple gas output openings and slots that can be independently designed and manufactured using standard manufacturing machinery, distributing the complexity across simple, modular components rather than requiring a single complex high-flow gas delivery system
Solution Approach 2:
The dryer gas output openings and slots serve multiple functions: they deliver dryer gas, distribute it uniformly across the sheet material, and their specific arrangements optimize both drying performance and gas flow patterns. This multi-functionality reduces the need for additional specialized components, managing system complexity while maintaining high productivity
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 configuration enhances drying performance, increases productivity, and ensures uniform drying across the application width while minimizing stress on the sheet material, allowing for higher processing speeds without damaging the material or ink.
Implementation Method 1
Dryer units are used for drying ink after a printing process
Implementation Method 2
the dryer gas exiting the slots may be used in order to break an air stream resulting from the movement of the sheet material
Data Source
Figure 1~2
Figure 3
AI summary
A dryer unit (18) for applying a dryer gas to a sheet material inside a printing machine comprises a dryer body (20) having a first set (26) of dryer gas output openings (28). These openings (28) are arranged in a substantially regular pattern covering an application width (20a) of the dryer unit (18). Additionally, at least one dryer gas output slot (38) is arranged upstream the first set (26) of dryer gas output openings (28). Furthermore, a printing machine is presented which comprises such a dryer unit (18).