Flexographic Plate Thermal Development Cooling Assembly
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Solution Overview
Problem
The existing thermal development apparatus for flexographic plates can cause distortion or deformation of the base film due to heating, which compromises the quality and usability of the plates for printing operations.
Innovation Solution
Incorporating a cooling assembly downstream of the contact means in the thermal development apparatus, which cools the flexographic plate through contact with cold surfaces after heating, thereby preventing distortion and maintaining the integrity of the base film.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If thermal development is performed by heating the flexographic plate to melt and remove unexposed polymer or monomer, then the development efficiency is improved and drying time is eliminated, but the base film undergoes distortion or deformation due to excessive heat
Solution Approach 1:
The patent applies different thermal treatments to different regions of the plate: the outer surface receives heating to melt and remove unexposed polymer/monomer, while the base film is protected from excessive heat through the use of a support cylinder with specific thermal properties and a cooling assembly. This localized thermal management allows efficient development without compromising base film integrity.
Solution Approach 2:
The cooling assembly is positioned to immediately cool the outer surface after heating, preventing heat from penetrating to and deforming the base film. This preliminary cooling action counteracts the potential harmful thermal effects before they can propagate to the base film, maintaining manufacturing precision while preserving productivity.
2Speed
If the heating temperature is increased to improve removal of unexposed material, then the development speed increases, but the risk of base film deformation increases
Solution Approach 1:
The support cylinder acts as an intermediary thermal barrier between the heating source and the base film. It allows the outer surface to be heated to high temperatures for fast development while preventing this heat from reaching the base film, thus eliminating the harmful effect while maintaining the beneficial speed improvement.
Solution Approach 2:
The patent utilizes the phase transition of unexposed polymer or monomer from solid to liquid at elevated temperatures to enable its removal. By controlling the heating to achieve this phase transition only at the outer surface and immediately cooling it, the process achieves fast development without base film damage.
3Reliability
If the plate is heated for an extended period to ensure complete removal of unexposed material, then the development completeness is improved, but the base film is more likely to deform
Solution Approach 1:
The patent implements continuous heating and continuous cooling in conjunction with the plate's movement through the apparatus. This ensures complete removal of unexposed material through sustained thermal action while simultaneously preventing base film deformation through continuous heat dissipation, achieving both reliability and manufacturing precision.
Solution Approach 2:
The patent replaces prolonged thermal exposure with a combination of controlled heating and active cooling. Instead of relying on extended heating time alone to ensure complete development, the system uses thermal management to achieve complete material removal in a shorter time while protecting the base film.
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 cooling assembly effectively prevents distortion and deformation of the base film, ensuring the quality and usability of the flexographic plates without increasing process times or reducing heating temperatures.
Implementation Method 1
heating means for heating the first surface of the flexographic plate to a temperature sufficient to melt at least a portion of said non-crosslinked polymer/monomer
Implementation Method 2
a cooling assembly for cooling the flexographic plate at an operating position downstream of the operating position at which the absorbent material contacts the first surface of the flexographic plate
Data Source
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AI summary
The present invention refers to a thermal development apparatus (1) for removing non-crosslinked polymer or monomer from a first surface (5a) of a flexographic plate (5). The apparatus according to the invention comprises a moving assembly (10) defining a support surface (11a) for the plate (5), wherein said moving assembly (10) moves said flexographic plate (5) along a predetermined trajectory. The apparatus (1) further comprises a development operating assembly (20) for applying an absorbent material (B) to said first surface (5a) of the plate (5) during the movement thereof. In particular, this development operating assembly (20) comprises feeding means (7A, 7B, 7C) of said absorbent material (B) and heating means (22, R) for heating said first surface (5a) of said flexographic plate (5) to a temperature sufficient to melt at least a portion of said non-crosslinked polymer/monomer. Said second operating assembly (20) further comprises contact means (25, 28) configured to cause a contact between said absorbent material (B) and said first surface (5a) of said flexographic plate (5) to allow said melted polymer/monomer to be absorbed by said absorbent material. The apparatus (1) according to the invention further comprises a cooling assembly (30) for cooling said flexographic plate (5) at an operating position (P2) downstream of the operating position (P1) at which said absorbent material (B) contacts said first surface (5a) of said flexographic plate (5), wherein said operating positions are considered with respect to said predetermined trajectory (L) along which said flexographic plate (5) is moved.