When purchasing a conveyor belt vulcanizing machine, a comprehensive consideration should be made from multiple dimensions such as equipment performance, process adaptability, safety and reliability, and cost-effectiveness. The following are specific points to note and analysis:
First, core performance parameter matching
Precision of the heating system
Temperature uniformity: The temperature difference between the heating plates of high-quality vulcanizing machines should be ≤±3℃. The upper and lower heating plates are made of high-strength aviation aluminum alloy materials such as LY12-CZ or 7005-TS, and are precisely crafted through a special process to ensure uniform heating.
Heating rate: The time to rise from room temperature to vulcanization temperature (145℃) should be no more than 25 minutes. Rapid heating can shorten the operation cycle and improve efficiency.
Temperature control accuracy: It adopts a fully automatic precision digital display control system, with a temperature control error of ≤±2℃, meeting the high-precision vulcanization requirements of steel cord conveyor belts, etc.
Stability of pressure system
Pressure range: The pressure adjustment range should cover 1.0-2.0MPa, and it should be easy to adjust to meet the vulcanization process requirements of conveyor belts of different thicknesses.
Pressure uniformity: The water pressure system must ensure uniform pressure distribution during the vulcanization process to prevent a decrease in joint strength due to insufficient local pressure.
Second, process adaptability analysis
The conveyor belt type is compatible
Steel cord conveyor belt: One or more stages of vulcanization joint process should be adopted. The equipment should support step joints or dedicated vulcanization molds to ensure that the tensile strength of the joints meets the standards.
Multi-layer fabric core conveyor belt: It is advisable to adopt a stepped joint form. The equipment needs to meet the requirements of temperature and pressure control in the multi-layer fabric core vulcanization process.
Compatibility of vulcanization process
Vulcanization three-element control: The equipment should be equipped with independent regulation and interlocking control functions for the three elements of temperature, time and pressure to ensure the precise execution of vulcanization process parameters.
Process record function: Prioritize models with process parameter storage and export functions to facilitate quality traceability and process optimization.
Third, safety and reliability assessment
Insulation performance
The equipment must pass the electrical insulation performance test, with insulation resistance ≥1MΩ and the operating current of the leakage protection device ≤30mA to ensure operational safety.
Structural strength
The frame of the vulcanizing machine should be made of high-quality aviation aluminum alloy (such as 7005-TS), which is of high strength and light weight, and is not prone to deformation under ultra-high pressure, ensuring long-term stability in use.
Protection grade
The protection level of the control box should reach IP54 or above to prevent dust and water vapor from entering and adapt to harsh working conditions such as mines and ports.
Fourth, cost-benefit analysis
Purchase cost
Compare the prices of similar models to avoid paying a premium for non-core functions. For instance, the price range of a common electric heating vulcanizing machine is 23,000 yuan per set, and the configuration should be selected based on the process requirements.
Usage cost
Energy consumption: Prioritize energy-saving models with a power of no more than 5kW to reduce long-term operating costs.
Maintenance cost: Pay attention to the universality and price of vulnerable parts (such as heating plates and sealing rings). Choosing a modular design model can reduce downtime.
Full life cycle cost
Calculate the ratio of equipment purchase cost, energy consumption, maintenance cost to service life, and give priority to choosing models with high cost performance. For instance, the overall weight of a certain domestic model is one-third lighter than that of similar models. Long-term use can reduce transportation and handling costs.
Fifth, service and support system
Technical training
The supplier is required to provide training on vulcanization process operation, including practical courses such as temperature curve setting, pressure regulation, and joint preparation, to ensure that the operators are proficient in the equipment.
After-sales response
The supplier is required to provide a response within 24 hours to reduce the downtime losses caused by equipment failure.
Spare parts supply
Confirm the inventory and supply cycle of key spare parts such as heating plates, pressure gauges, and temperature control modules, and give priority to choosing models with strong universality of spare parts.