Quality appraisal of automatic powder spraying machine

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automatic powder spraying machine takes the synergy of electrostatic adsorption and powder uniform spraying as its core principle. By optimizing the spraying voltage, powder flow rate and atomization air pressure, it achieves the synergy of coating thickness uniformity, powder utilization rate and production efficiency. It is widely used in the surface coating fields of automobile parts, home appliances, furniture and metal products. In automobile wheel hub spraying, it is used for uniform coverage of high-gloss powder; in the field of home appliance casings, it meets the demand for spraying complex curved surfaces without dead corners; in anti-corrosion engineering, it ensures the adhesion and salt spray resistance of epoxy coatings. Compared with traditional equipment, automatic powder spraying machines have features such as intelligent closed-loop control, multi-gun collaboration (dynamic path planning), and environmental protection and energy saving. They are the core equipment for efficient painting.

Zhongke Testing is a product quality appraisal service organization registered with the court. It can provide quality appraisal services for automatic powder sprayers. It has a professional appraisal team and advanced instruments and equipment to provide fair and accurate appraisal results for the quality appraisal of automatic powder sprayers.

As environmental protection and painting standards become stricter, related quality dispute cases have increased significantly. The judicial dispute focuses on:

1, performance index disputes: uneven coating thickness, powder utilization;

2, material defects: spray gun tungsten needle life, recycling filter element damage;

3, process problems: electrostatic voltage fluctuations, atomization air pressure deviation;

4, contract performance disputes: core modules (such as imported high-voltage generators, intelligent powder supply systems) are inconsistent with the technical agreement.

0 Such cases need to pass coating performance testing, material failure analysis and dynamic spraying verification to clarify the quality responsibility.

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automatic powder spraying machine quality identification technical methods mainly include:

1, physical detection method

The physical detection method is one of the common methods for identifying the quality of automatic powder spraying non-standard parts equipment. Physical inspection methods include appearance inspection, dimensional measurement, hardness testing, metallographic analysis, etc. Through physical detection methods, various physical performance indicators of the equipment can be obtained, providing a basis for drawing identification conclusions.

2, chemical analysis method

The chemical analysis method is also one of the important methods to identify the quality of automatic powder spraying non-standard parts equipment. Chemical analysis methods include component analysis, spectral analysis, energy spectrum analysis, etc. Through chemical analysis methods, the chemical composition information of the equipment can be obtained, providing a basis for drawing identification conclusions.

03, performance test method

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2The performance test method is one of the core methods for identifying the quality of automatic powder spraying non-standard parts equipment. Performance testing methods include powder spraying uniformity test, powder spraying thickness test, powder spraying speed test, etc. Through performance testing methods, various performance indicators of the equipment can be obtained, providing a basis for drawing identification conclusions.

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The applicant, an auto parts factory, and the respondent, an equipment manufacturer, signed a "Purchase Contract for Automatic Wheel Hub Powder Spraying Line", agreeing that the powder utilization rate is ≥95%. After being put into production, the actual measurement was only 82%. The manufacturer argued that it was caused by the powder absorbing moisture.

identification analysis results:

The quality analysis expert group discussed and synthesized technical data on the "automatic powder spraying machine" related information, contract technical agreements, on-site investigation case materials and other data After analysis, the following quality analysis opinions were made:

The flow rate of the powder supply system of the automatic powder spraying machine involved in the case fluctuated by ±12% (agreed ±5%), and the recovery filter element damage rate was 15%; the spray gun voltage calibration deviation was -8kV (agreed ±3kV), resulting in a decrease in adsorption efficiency.

The appraisal conclusion concluded that defects in the powder supply system and voltage control were the main causes of waste.

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Automatic powder spraying machine quality appraisal report should include:

1, appraisal purpose (such as coating defect attribution, environmental compliance verification) and reference standards;

2, involved equipment model, control system version, process parameter record;

3, detection method and equipment Preparation list (such as thickness gauge, SEM);

4, detection data and failure correlation analysis (such as the impact of voltage deviation on utilization);

05, clarify the quality responsibility judgment conclusion and technical basis;

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26, signature of the appraiser, mechanical engineer qualification certificate and official seal of the organization.

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