Painting Robot Nozzle Head Thermal Management
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Solution Overview
Problem
The temperature rise in the nozzle head of injection type painting robots due to heat generation can lead to misoperation, damage, and deterioration of paint quality, especially when using paints with organic solvents, which affects the electrical characteristics of piezoelectric substrates and paint viscosity.
Innovation Solution
A painting robot with a nozzle head mounted in an explosion-proof housing equipped with a heat-release unit and a temperature measuring unit, where a power cut-off device stops the power supply to the piezoelectric substrate when a predetermined temperature is reached, maintaining the nozzle head temperature below a constant level.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If injection type nozzle head is used for painting, then painting efficiency and automation are improved, but heat generation causes temperature rise leading to misoperation and damage
Solution Approach 1:
A heat-release plate is introduced as an intermediary component between the piezoelectric substrate and the external environment. This plate conducts heat away from the piezoelectric substrate, preventing temperature rise that would cause misoperation or damage, thereby maintaining reliability while preserving automation benefits
Solution Approach 2:
A temperature sensor is mounted on the heat-release plate to continuously monitor the temperature of the piezoelectric substrate. This feedback mechanism detects temperature changes and enables control systems to adjust operating conditions or trigger cooling measures, preventing thermal runaway and ensuring reliable operation
2Temperature
If temperature rises due to heat generation, then electrical characteristics of piezoelectric substrate change, but this leads to misoperation and damage
Solution Approach 1:
The heat-release plate serves as a thermal intermediary, providing a dedicated heat dissipation path that separates the piezoelectric substrate from the thermal environment. This maintains stable electrical characteristics by preventing temperature-induced changes while allowing controlled heat management
Solution Approach 2:
The temperature sensor mounted on the heat-release plate provides real-time temperature feedback, enabling the control system to maintain the piezoelectric substrate within its optimal temperature range, thereby preserving electrical characteristic stability and preventing misoperation
3Productivity
If paint is discharged from nozzles, then painting function is achieved, but heat causes paint viscosity change and quality deterioration
Solution Approach 1:
The heat-release plate acts as a thermal barrier and heat dissipation intermediary, protecting the paint supply system from heat-induced viscosity changes. This maintains consistent paint flow and atomization quality while enabling continuous high-productivity painting operations
Solution Approach 2:
Temperature monitoring via the sensor on the heat-release plate provides feedback on thermal conditions affecting paint properties. This enables control systems to adjust paint delivery parameters or activate cooling measures, maintaining manufacturing precision throughout high-volume production
4Adaptability or versatility
If organic solvent-containing paint is discharged, then painting versatility is improved, but temperature rise creates explosion hazard
Solution Approach 1:
The heat-release plate and explosion-proof housing serve as protective intermediaries that isolate the piezoelectric substrate and paint system from thermal hazards. This enables safe handling of volatile organic solvent-containing paints by preventing temperature rise that could trigger explosion, while maintaining versatility in paint selection
Solution Approach 2:
Temperature sensing on the heat-release plate provides early warning of dangerous temperature conditions when handling flammable paints. This feedback enables control systems to prevent hazardous temperature rise, allowing versatile use of organic solvent-containing paints without explosion risk
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 solution effectively suppresses the temperature rise of the nozzle head, preventing misoperation and maintaining paint quality by ensuring the nozzle head operates within a safe temperature range, thereby preventing thermal runaway and maintaining paint viscosity.
Implementation Method 1
discharging paint from the nozzles by driving of a piezoelectric substrate
Implementation Method 2
a heat-release unit which release the heat generated from the nozzle head is mounted to the nozzle head
Implementation Method 3
a temperature measuring unit which measures the temperature of the heat-release unit is mounted to the heat-release unit
Data Source
Figure 1
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AI summary
Provided is an inkjet-type vehicle painting machine capable of keeping temperature elevation of a nozzle head to a certain temperature or less. The painting robot 10 comprises a power supply means 120 for supplying power to drive a piezoelectric substrate 62 of a nozzle head 53, and a robot arm R1 for moving the nozzle head 53. The nozzle head 53 is provided in an explosion-proof housing 70 equipped with an explosion-proof construction. A heat dissipation means 90 that dissipates heat generated from the nozzle head 53 within the explosion-proof housing 70 is attached to the nozzle head 53. A temperature measurement means 100 for measuring the temperature of the heat dissipation means 90 is attached to the heat dissipation means 90. Also, there is provided a power cutoff means 110 for cutting off the supply of power from the power supply means 120 to the piezoelectric substrate 62 on the basis of a detection signal from the temperature measurement means 100 when the temperature measurement means 100 measures that a stipulated temperature has been reached.