Coating Machine With Distance-Dependent Rotation Speed
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Solution Overview
Problem
Existing decoration machines for hollow bodies, such as bottles, struggle to achieve homogeneous distribution of coating substances on complex-shaped bottles, leading to uneven layer thickness and increased substance consumption, which is economically inefficient and aesthetically unsightly due to visible demarcation lines.
Innovation Solution
A process and machine that position the bottle on a support with a spray device, where the relative movement between the support and spray device includes a rotation speed varying according to the distance between the spray device and the bottle surface, ensuring a consistent and uniform coating distribution by adjusting speed based on the distance to compensate for shape complexities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the spray rate is increased to cover complex-shaped bottles, then the coating coverage is improved, but the substance consumption increases significantly and distribution homogeneity deteriorates
Solution Approach 1:
The support rotation speed is made variable rather than constant, adjusting dynamically according to the distance between the spray device and the bottle surface. This dynamic adjustment ensures optimal coating distribution across complex shapes without excessive substance application, resolving the contradiction between coverage quality and material consumption.
Solution Approach 2:
The rotation speed parameter of the support is changed as a function of distance, allowing the system to adapt the coating process parameters to the specific geometry being coated. This parameter variation enables homogeneous coating on complex shapes while maintaining efficient substance usage.
2Manufacturing precision
If the spray rate is increased to ensure coverage of complex shapes, then the coating coverage is improved, but visible demarcation lines appear due to heterogeneity
Solution Approach 1:
By making the rotation speed dynamic and distance-dependent, the system prevents the formation of demarcation lines that occur with constant speed rotation. The varying speed ensures continuous homogeneous coating deposition across the entire bottle surface, eliminating visible boundaries between coated zones.
Solution Approach 2:
Changing the rotation speed parameter based on distance prevents coating heterogeneity and the resulting visible demarcation lines. This parameter adaptation ensures uniform coating quality across complex geometries.
3Device complexity
If a stationary support is used with a rotating spray device, then the coating process is simplified, but homogeneous distribution on complex shapes cannot be achieved
Solution Approach 1:
Instead of rotating the spray device around a stationary bottle, the invention inverts the approach by keeping the spray device stationary and rotating the support with the bottle. This inversion simplifies the overall mechanism while enabling homogeneous coating of complex shapes through the variable rotation speed of the support.
Solution Approach 2:
The support rotation speed is made variable to achieve homogeneous coating distribution on complex shapes, resolving the contradiction between mechanism simplicity and coating quality. The dynamic speed adjustment compensates for geometric variations without requiring complex multi-axis spray device motion.
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 ensures a homogeneous and efficient distribution of the coating substance, optimizing the quantity used and achieving a visually uniform coating on bottles of any shape or size, reducing economic waste and improving aesthetic appeal.
Implementation Method 1
a step of spraying at least one coating substance on said surface of said hollow body using a spray device
Data Source
Figure 1~2D
Figure 3~5
AI summary
- Coating method and corresponding coating machine. - The invention relates to a method for coating a surface (2) of a hollow body (1) comprising: - a step of positioning said hollow body (1) on a support (7) designed to receive said hollow body (1), - a step of spraying at least one coating substance onto said surface (2) of said hollow body (1) using a spraying device (9), said support (7) and spraying device (9) being animated by a relative movement, said coating method being characterized in that said relative movement occurs at a speed that varies according to the distance (d) between the spraying device (9) and said surface (2). - Coating machines.