Quality appraisal of tread laminating machine

tread laminating machine is the core equipment of tire manufacturing. It is used to accurately fit the tread rubber and carcass ply to form the key structural layer of the tire. Its performance directly affects the uniformity, strength and service life of the tire. In the production of passenger car and commercial vehicle tires, the tread laminating machine ensures the seamless combination of the tread and the carcass through high-precision pressure control and temperature regulation, improving the impact resistance and wear resistance of the tire. Compared with the traditional mechanical laminating process, modern intelligent laminating machines rely on servo drive, laser positioning and other technologies to increase production efficiency by more than 30%, becoming an important symbol of the intelligent upgrading of the tire industry.

With the expansion of tire production capacity, the number of tread laminator quality disputes has gradually increased. The judicial dispute focuses on: whether the equipment meets the lamination pressure accuracy (such as ±0.1MPa), temperature control stability (±2℃), production rhythm and other indicators agreed in the contract; whether there are tread deviations and bubble defects caused by mechanical wear and control system failures; and the correlation between quality problems and the decline in the tire finished product qualification rate and the shutdown of the production line. In such cases, the tread press quality appraisal uses pressure curve analysis, temperature field testing and other technical means to provide a scientific basis for the court to determine liability and loss compensation, and promote technological innovation in tire manufacturing equipment.

Zhongke Testing is a product quality appraisal service organization registered with the court. It can provide quality appraisal services for tread laminating machines. It has a professional appraisal team and advanced instruments and equipment to provide fair and accurate appraisal results for tread laminating machine quality appraisal.

Tread laminating machine quality appraisal technical methods include:

1, appearance and structural inspection

Verify the surface roughness and parallelism of the laminating roller, and detect whether there is wear, scratches or corrosion. Check the sealing of the hydraulic system and test whether the cylinder pressure response time meets the design requirements.

2, pressure and temperature control test

uses a pressure sensor to monitor the pressure value during the lamination process in real time to verify its stability and uniformity. Use an infrared thermal imaging camera to scan the temperature field of the lamination area to evaluate the temperature control accuracy of the heating system.

0 verify whether the operation logic of the human-machine interface is reasonable and whether the parameter settings have the function of preventing accidental touch. Simulate emergency shutdown, fault alarm and other scenarios to test system response time and reliability.

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26, wear and life evaluation

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4Through spectral analysis of the material composition on the surface of the pressing roller, the thickness and wear resistance of the hardened layer are detected. Conduct continuous production fatigue tests to record the wear rate of key components (such as bearings and seals).

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67, on-site process and environmental assessment

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8Verify whether the tread rubber preheating temperature and conveying speed meet the process specifications. Analyze the effects of workshop temperature, humidity, and dust concentration on equipment performance.

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A tire company of the applicant signed a "Fully Automatic Tread Laminating Machine Purchase Contract" with an equipment manufacturer of the respondent, agreeing to purchase 5 units of DW-800 equipment. Six months after the equipment was put into production, problems such as tread pressure bubbles and insufficient peel strength occurred in many production lines, resulting in a 25% drop in the finished tire qualification rate. The tire company believed that the equipment had design defects and demanded compensation for the loss caused by the suspension of production. The equipment manufacturer argued that the problem was caused by improper rubber formulation or operation, and both parties went to court. The court entrusted a third-party appraisal agency to conduct quality appraisal of the equipment involved in the case.

Identification analysis results:

The quality analysis expert group discussed and comprehensively analyzed the relevant information of the "tread laminating machine", contract technical agreement, on-site inspection case materials and other data, and made the following quality analysis opinions:

1. There are tiny pits (depth) on the surface of the pressing roller of the tread laminating machine involved. 0.03-0.05mm), resulting in uneven local pressure distribution. There are leak points in the hydraulic system, and the pressure fluctuation range reaches ±0.3MPa (the contract requires ±0.1MPa).

2, the linear speed deviation of the pressing roller of the tread pressing machine involved in the case reached ±1.2%, causing the tread to stretch and deform, and the local thickness was out of tolerance.

The tread laminating machine quality appraisal report should include the following content:

1. Information on the appraisal client and the appraised party.

2. Testing items, sampling methods, testing methods and equipment.

3. Test results and analysis.

4. Quality evaluation conclusion.