Using micro PU foaming machine on-site pouring the preparation of polyurethane sealing strip, operation or debugging personnel should be familiar with the characteristics of raw materials and process conditions, PU foaming machine equipment, the basic structure and operation requirements, different operation requirements of different cross section sealing strip, make the casting machine always spit out quantity and switchboard movement speed and the reaction of the castable performance is better cooperate, make whole sealing strip not only the cross section, and joint formation. The following points should be noted during the specific operation:

For accurate measurement, the error should not be more than 1%. The quality ratio of material A and material B must comply with the requirements of the technical formula. Moreover, the proportion should be kept basically unchanged throughout the pouring process, that is, the instantaneous ratio and the average ratio are basically the same. In addition, the accuracy of total discharges per unit time, if the total discharges per unit time are too large, the volume or thickness of the sealing strip will change, resulting in defective products or waste products. B mixture should be uniform. Only when the two-component raw liquid is mixed evenly in the pouring head can it be poured into a qualified polyurethane sealing strip, and the physical properties of the whole sealing strip can be guaranteed to be consistent (when the sealing strip is cut, the foam holes of its section should be uniform). PU foam machine control temperature stability. The material temperature will directly affect the reaction speed, the viscosity of the original liquid and reactant. Keeping the material temperature stable is a necessary condition to ensure the normal production of the sealing strip and to improve its normal rate. At the same time, the ambient temperature during pouring should be 20~30 degrees Celsius, not less than 15 degrees Celsius, otherwise the foaming difficulties of the castable will affect the quality of the sealing strip. Articles come from the Internet

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