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The delicate balance of pressure control
In the operation of the automatic photovoltaic glass tape laminating machine, pressure is a crucial factor. It directly affects the integrity of the photovoltaic glass and the bonding strength between the tape and the glass. Excessive pressure will become the "culprit" of the cracking of photovoltaic glass, especially at the edge or weak area of the glass. Excessive pressure will exceed its tolerance, causing cracks or even complete rupture, which not only increases production costs, but also seriously affects the safety and service life of photovoltaic modules. On the other hand, if the pressure is too small, the air between the tape and the glass cannot be effectively removed, resulting in gaps on the bonding surface, which in turn affects the firmness and sealing of the bonding, and may cause water vapor penetration in the long run, damaging the performance of photovoltaic cells.
Therefore, it is crucial to find the "golden point" of pressure control. This usually requires a comprehensive consideration based on the viscosity characteristics of the tape material used (such as EVA, POE, etc.), the thickness of the photovoltaic glass, and the expected lamination strength. Modern fully automatic laminating machines are usually equipped with advanced pressure sensors and intelligent control systems, which can automatically adjust the pressure according to preset parameters to ensure that each laminating can achieve the best effect.
The fine art of time control
Laminating time is also a factor that cannot be ignored. It is directly related to the degree of curing of the adhesive, the tightness of the bonding surface, and the overall accuracy of the component. If the laminating time is too short, the adhesive may not be fully cured, the bonding strength is insufficient, and it may loosen due to vibration during subsequent processing or transportation. On the contrary, if the laminating time is too long, although it can ensure that the adhesive is fully cured, it may also cause excessive compression of the tape, affecting its resilience and buffering capacity, and even causing micro-damage to the surface of the photovoltaic glass, affecting the optical performance.
In order to achieve the best laminating effect, the laminating time must be finely adjusted according to the curing characteristics of the tape, the ambient temperature, and the overall rhythm of the production line. Some high-end fully automatic laminating machines also have adaptive learning functions, which can continuously optimize the laminating time based on historical data and real-time feedback to ensure that each laminating can achieve the best state.
Scientific practice of parameter setting
In actual operation, to accurately set the pressure and time of the fully automatic photovoltaic glass tape press, it is first necessary to fully understand the performance parameters of the materials and equipment used. This includes but is not limited to the type, thickness, and viscosity range of the tape, the material, thickness, and strength characteristics of the photovoltaic glass, and the maximum pressure, minimum pressure, pressure adjustment accuracy, heating method, and temperature control range of the press.
Secondly, through small-scale experimental pressing, gradually adjust the pressure and time parameters, observe and record the pressing effects under different parameter combinations, including bonding strength, appearance quality, production efficiency, etc. Based on these data, the pressure-time-quality relationship curve can be drawn to find the optimal parameter combination.
Finally, the verified optimal parameters are input into the control system of the press to realize an automated and standardized production process. At the same time, a regular inspection and calibration mechanism is established to ensure the long-term stable operation of the press and maintain the consistency of the pressing quality.
