Polyurethane foaming equipment is mainly used to produce polyurethane products, including high-pressure and low-pressure foaming agents and spraying machines for the production of polyurethane foams, casting machines for the production of polyurethane elastomer materials, and production methods. It is used in the production of polyurethane filling materials, such as infusion machines, shoemaking machines and production lines. Polyurethane equipment is widely used in refrigerators, freezers, automobiles, shoemaking and polyurethane rubber industries.
During the infusion and foaming process of rigid polyurethane foam, the foaming pressure will change with time. After the raw material is injected, the pressure gradually increases to the MAX value, and then gradually decreases.
The foaming pressure of the high-pressure polyurethane foaming machine is affected by many factors. These factors include the hydroxyl value and structure, the type of isocyanate, the type and dosage of the catalyst, the type and dosage of the blowing agent, the temperature of the raw material, the temperature, the product size and the number of infusions, etc.
When using a polyurethane high-pressure foaming machine, keep in mind that temperature has a significant impact on the output of the blowing agent and the quality of the foam. Below 30, the higher the water temperature, the lower the foam density and the higher the yield. However, if the water temperature exceeds 30, the bubble density is too small, the bubble wall is too thin, and it is easy to defoam, so the output will be reduced, so the temperature of the foaming agent aqueous solution is controlled at 20 to 30°C.
Polyurethane high-pressure foaming machines have been widely used in our lives. Polyurethane foaming machines are safe, reliable, easy to maintain, low operating costs, and effectively reduce transportation costs. When combined with import and export transportation equipment, the transportation process is fully automatic, avoiding the instability caused by manual operation.