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What is the key in the foaming process of polyurethane foam machine?

2022-07-15 08:14:44
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Temperature and pressure are the two key factors in the foaming process of polyurethane foam machine.


If the pressure of the polyurethane foaming machine is too low, the two components can not be fully mixed and affect the foaming speed, but too high will put higher process requirements on the entire equipment. It will also have a greater impact on the foaming speed is the temperature, the temperature is too high, the reaction speed is accelerated, and other equipment and processes are required to adapt to it accordingly; The temperature is too low, the reaction is slow, the curing time is long, and the production efficiency is affected accordingly. Therefore, in the design process, the temperature must be controlled within the range of 65±1℃ according to the process requirements.


The pressure of the polyurethane foam machine can be changed by setting the number of movements of the air pump per minute, which has high flexibility; The temperature control is realized by two solid state relays, PID control is adopted, which has the advantages of fast response and good stability.


Polyurethane foaming machine is divided into two categories of low pressure foaming and high pressure foaming according to the component metering pressure and mixing system. The foaming principle of polyurethane foaming machine: different components of the stock liquid, through the precise ratio and high-speed stirring, by the high-precision metering pump, each component of the liquid is transported to the mixing head. After high speed and strong stirring, the material liquid is sprayed evenly to form the required product.



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