Precoat Material for Overspray Separation in Coating Plants
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing coating systems face challenges in effectively separating and reusing overspray paint from air flows in automatic painting systems, leading to inefficient waste disposal due to high paint concentration in the precoat material mixture.
Innovation Solution
The use of specially prepared substances with high absorption capacities, such as zeolites and hollow spheres, along with chemically reactive additives like hydrolyzed amines and ammonia, to enhance the binding and absorption of paint particles, allowing for improved separation and potential reuse of the precoat material.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of substance
If conventional precoat material is used in coating systems, then the filter surfaces are protected from sticking, but the absorption capacity for overspray is insufficient leading to high paint concentration in waste
Solution Approach 1:
The patent changes the physical and chemical parameters of the precoat material by using materials with specific properties: pore sizes between 0.003-0.03 micrometers, specific surface areas of 300-1000 m²/g, and controlled particle densities. These parameter changes enable significantly higher absorption capacity for paint overspray while maintaining filter functionality, thus reducing paint concentration in waste material.
Solution Approach 2:
The invention employs composite precoat materials combining different substances with complementary properties. The precoat layer consists of multiple components including porous materials (zeolites, activated carbon), fibrous materials (glass fibers, ceramic fibers), and binding agents. This composite structure provides both high absorption capacity and appropriate mechanical properties for filter application.
2Reliability
If precoat material with high absorption capacity is used, then paint particles are better bound, but the material requires special preparation and may be more complex to implement
Solution Approach 1:
The patent applies preliminary action by pre-treating the precoat material with binding agents and activating its porous structure before actual use. The material is prepared in advance with optimal moisture content, binding agent distribution, and pore activation to ensure maximum binding effectiveness from the start. This preliminary preparation simplifies the overall implementation by eliminating the need for complex on-site treatment processes.
3Loss of substance
If the paint concentration in precoat material is too high, then disposal becomes necessary, but this leads to waste of valuable paint ingredients
Solution Approach 1:
The invention implements a recovery system where used precoat material is collected and regenerated. The highly absorbent precoat material can be heated to evaporate trapped paint solvents, then cooled and reused. This recovering process extends the service life of the precoat material many times over, reducing disposal frequency and recovering valuable paint ingredients that would otherwise be wasted.
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 approach significantly increases the absorption capacity of the precoat material, reducing waste and operational costs, while enabling better adaptation to the requirements of automatic coating systems and allowing for the reuse of materials in other industrial processes.
Implementation Method 1
particles with a large internal surface such as zeolites can be used, ie natural or artificially produced hydrated aluminosilicates. Due to their cavity structure with numerous pores and channels, they have a relatively large inner surface, which has an exceptionally high and specific ion exchange, adsorption and hydration capacity
Implementation Method 2
Due to the fiber and/or cavity structure of such materials with inner and/or outer surfaces that are large relative to their external dimensions, painting particles are effectively sucked into the precoat particles
Implementation Method 3
Either the precoat material has reactive groups for this purpose, e.g. B. amine, epoxy, carboxyl, hydroxyl or isocyanate groups, or the precoat material are mixed with substances that have these groups on their surface
Data Source
Figure 1
Figure 2~3
AI summary
The method for separating overspray of a liquid coating material from an airflow which flows through an application area (108) of a workpiece coating plant, entails using, at least in part, particles with a fiber or cavity structure and/or particles which chemically react with the overspray, as aiding material for absorption and/or binding of the overspray. The airflow for separating the overspray particles is directed through a filtering device (168). A mixture of two or more different substances may be used as aiding material. An independent claim is included for a device for separating overspray of a liquid coating material from an airflow which flows through an application area of workpiece coating plant.