There is a certain foaming temperature limit when the foam machine performs foaming. It is not suitable to be too high or too low within a standard temperature.
The material temperature is best at 20 ℃ -24 ℃, too high foaming, fast drawing time, short gelation time, low viscosity of the foamed material, easy to cause partial exhaust, bubble delamination and overflow , Making the density distribution of the box uneven; too low foaming time, long drawing time, high viscosity of the foam, poor fluidity, will cause uneven mixing, partial shortage of material, the foamed box has a crispy skin Layered.
The ambient temperature is greater than or equal to 20 degrees Celsius. If the temperature is too high, the viscosity of the foamed material is small, the fluidity is good, and it is easy to cause overflow. At the same time, it causes rapid foaming and is prone to lack of material; At the same time, the foaming is slow, causing the cabinet to delaminate or shrink after foaming, so that the back or the side panels are delaminated, and also cause a partial shortage of the cabinet.
The temperature of the mold should be too high within 35 ℃ to 50 ℃, it is easy to cause the foam to have good fluidity in the box, but at the same time, it will cause the foam to react quickly near the inner bladder, and generate more gas and delaminate or Lack of material. Due to the high temperature of the mold, the tank is easily deformed; too low temperature, the reaction is slow, and the foamed material is crispy and layered near the shell. Mainly grasp the foam material temperature, ambient temperature, and mold temperature, you can roughly grasp the overall foam temperature. With the continuous advancement of technology, the technical content of foam machinery continues to increase, and new models continue to appear. In recent years, the continuous technological upgrading of foam machinery in China has now developed into an automatic equipment with foaming, mixing and pumping as one.
