Spray Gun Resilient Pipe for Uniform Coating
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Solution Overview
Problem
Existing spray gun designs for applying coating materials to plastic containers face challenges such as stress on connecting parts when rotated, leakage issues, and increased installation space requirements, especially when dealing with containers of varying shapes and sizes.
Innovation Solution
An application apparatus featuring a spray gun with resilient-shape pipes that can extend and contract, a rotary drive unit for rotating the spray gun, and a moving unit for longitudinal movement, along with a suction mechanism to prevent material adherence and contamination, allowing for uniform coating application without complex structures or excessive space usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the spray gun is rotated and moved back and forth to apply coating material uniformly, then the coating uniformity is improved, but the connecting part between the pipe and spray gun is subjected to stress
Solution Approach 1:
The patent replaces the rigid pipe with a flexible hose that has high elasticity. This flexible hose can withstand the coating material pressure while simultaneously accommodating the rotational and linear movements of the spray gun, preventing stress concentration at the connecting part and eliminating leakage risks.
2Adaptability or versatility
If a rotatable connecting structure is used between the pipe and spray gun to allow rotation, then the spray gun can be rotated, but the connecting structure becomes complex and leakage prevention becomes difficult
Solution Approach 1:
The flexible hose inherently provides rotational capability through its flexibility without requiring any additional rotatable connecting structures. This eliminates complex mechanical joints and sealing mechanisms, simplifying the overall connecting structure while maintaining the spray gun's rotation capability.
3Adaptability or versatility
If a soft, highly elastic pipe is used to allow stretch during rotation, then the spray gun can be rotated and moved, but it is difficult to ensure sufficient strength to withstand coating material pressure
Solution Approach 1:
The flexible hose is specifically designed with high elasticity to accommodate the spray gun's rotational and linear movements. Its material properties and structural design enable it to stretch and deform flexibly while simultaneously maintaining sufficient strength to withstand the pressure of the coating material flowing through it.
4Strength
If the pipe is made sufficiently long to prevent stress during rotation, then the connecting part is protected from stress, but the pipe takes up much space in the lateral direction and increases installation space requirements
Solution Approach 1:
The flexible hose provides the necessary movement accommodation without requiring excessive length. Its high elasticity allows it to stretch and deform efficiently, protecting the connecting part from stress while maintaining a compact configuration that minimizes lateral space occupation and reduces installation space requirements.
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 apparatus ensures uniform coating application on the inner surfaces of containers while minimizing stress on connecting parts, preventing leakage, and reducing installation space requirements, enabling efficient operation within existing production lines with reduced facility investment costs.
Implementation Method 1
make the pipe using a soft, highly elastic material so that the pipe can stretch by elastic deformation when the spray gun is rotated and moved back and forth
Data Source
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AI summary
A coating material is uniformly applied on an inner wall surface of a container while preventing leakage of the coating material and an increase in an installation space. An application apparatus (10) that applies a coating material (L) on an inner wall surface of a container (C) includes: a spray gun (20) having a spray nozzle (22) and including a coating material ejection passage (23) formed therein; an outgoing pipe (30) and a return pipe (33) attached to the spray gun (20) and forming a coating material circulatory path (40) connecting to the coating material ejection passage (23); supply control unit (50) controlling supply of the coating material (L) from the coating material circulatory path (40) to the coating material ejection passage (23); rotary drive unit (60) rotating the spray gun (20) around an axis extending along a longitudinal direction of the gun; and moving unit (70) moving the spray gun (20) along the longitudinal direction of the gun, wherein the outgoing pipe (30) and the return pipe (33) are each provided with a resilient-shape part (32, 35) capable of extending and contracting resiliently.