Hydrostatic Paint Conveying Device for Contactless Coating
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Solution Overview
Problem
Existing painting technologies face challenges in achieving a compact design for painting devices that ensure contactless paint application without unwanted overspray, particularly for objects with complex shapes like aerosol can blanks.
Innovation Solution
The use of hydrostatic pressure to drive paint through outlet nozzles, which emit paint threads without the need for compressed air, allowing for controlled, contactless application of paint to the object's surface, with adjustable viscosity and nozzle geometry for optimal paint distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of substance
If compressed air is used to deliver paint to the nozzle, then paint can be delivered to the nozzle, but paint threads cannot be formed and overspray occurs
Solution Approach 1:
The patent extracts the harmful compressed air from the paint delivery system and replaces it with a gravity-based hydrostatic pressure system. This eliminates the source of overspray while maintaining paint delivery capability through a simpler mechanism that forms coherent paint threads without gas interference.
Solution Approach 2:
The patent applies hydrostatic pressure principles by using gravity to generate pressure in a paint reservoir, creating a pressure gradient that drives paint flow through the nozzle. This hydraulic approach replaces pneumatic compression with a cleaner, overspray-free liquid flow mechanism.
2Loss of substance
If contactless paint application is implemented, then overspray is reduced, but achieving uniform coating on complex shapes becomes difficult
Solution Approach 1:
The patent employs dynamic coordination between the rotation of the object holder and the linear or rotational movement of the nozzle assembly. This dynamic system adapts the paint application process to the complex geometry of the object, ensuring uniform coating coverage while maintaining contactless operation and preventing overspray.
Solution Approach 2:
The patent creates a multi-functional painting system that can handle various object shapes and sizes through coordinated movement mechanisms. The system universally applies paint to different geometries by combining object rotation with adjustable nozzle positioning, achieving uniform coating without contact or overspray.
3Shape
If paint viscosity is increased to form threads, then paint threads can be formed, but paint flow control becomes difficult
Solution Approach 1:
The patent optimizes paint viscosity within a specific range (50-500 cP) to enable thread formation while maintaining flow control. This parameter optimization, combined with hydrostatic pressure regulation, creates the ideal balance between thread coherence and flow responsiveness for precise paint application.
4Volume of moving object
If a compact painting device is designed, then space is reduced, but accommodating all necessary components becomes challenging
Solution Approach 1:
The patent integrates the paint reservoir, delivery channels, and nozzle assembly into a compact nested structure. The reservoir feeds paint through integrated channels directly to the nozzle, eliminating the need for external compressed air systems and reducing overall device volume while maintaining functional complexity.
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 method ensures efficient, spray-free paint application over the entire surface of objects, reducing waste and enabling precise control over paint deposition, even on complex shapes, without requiring special paint properties or additional fluids.
Implementation Method 1
the paint conveying device is designed to provide hydrostatic pressure on the paint and the outlet nozzles are designed to output paint threads in at least predominantly, in particular exclusively, dependence on the hydrostatic pressure on the paint
Data Source
Figure 1
Figure 2~4
Figure 5~6
AI summary
The invention relates to a painting device for painting an outer surface (25) of a painting object (6), comprising a dispensing device (21, 22, 23) for providing a continuous or discontinuous flow of paint and a receiving device (4) for receiving and positioning a painting object (6) opposite the dispensing device (21, 22, 23), wherein the dispensing device (21, 22, 23) includes a dispensing nozzle (26) and a paint conveying device (38) fluidically connected to the dispensing nozzle (26), which is configured for pressurized conveying of paint to the dispensing nozzle (26). According to the invention, the paint conveying device (38) is configured to provide hydrostatic pressure on the paint and the outlet nozzles (26) are configured to dispense paint strands (27) in at least predominantly, and in particular exclusively, dependent on the hydrostatic pressure on the paint.