Shicheng machinery explains the problems and solutions easily encountered in the operation of full-automatic PU polyurethane foaming machine

A. When the viscosity of the coating is too large to be scraped, a small amount of special diluent can be added for dilution to reduce the viscosity, and the addition amount shall not be greater than 10% of material B.

B. Air hole and bubble: the material mixing method and mixing time do not make the material mixed evenly; During construction, agitators with low power and rotating speed shall be used. Another reason is that the treatment of the base course is not clean. Before making the coating, the base course should be carefully cleaned without floating sand and dust, and there should be no pores on the base course. The pores in each layer of the coating should be treated according to the process requirements to prevent leakage caused by the damage of the coating.

C. Bulging: the base course has peeling, sanding, cracking and non drying, resulting in poor adhesion of the coating film; The construction of base course shall be carefully operated and maintained. After the base course is dry, the primer shall be painted first and then cured, and then painted layer by layer according to the construction process of waterproof layer.

D. Coating film edge warping: the edge of the waterproof layer and the lap joint of the itemized brush are stripped and edge warped from the same base layer. The main reason is that the base course is not clean or dry, the ending operation is not meticulous, the sealing is not good, and the bonding force of the bottom coating is not strong, so the base course should be clean, dry and operated carefully.

E. Damage: during the layered construction of the film waterproof layer or after the construction of all the film, the film will be damaged and scratched by human operation activities or placing tools and materials before the film is cured. The integrity of the film shall be protected during the construction.

F. During construction, attention shall be paid to fire prevention, construction personnel shall take protective measures, and the construction site shall be well ventilated to prevent solvent poisoning.

Shicheng machinery introduces the problems and solutions that are easy to occur in the operation of polyurethane foaming machine. In fact, there are many other knowledge in this regard, which we will introduce to you in the follow-up news. With the changing market demand, polyurethane foaming machine models are also slowly increasing. For users, they need to have a deeper understanding of these knowledge when using them. Of course, if you encounter problems in the process of use and don't know how to solve them, you can contact us for consultation, and we will have professionals to answer them one by one.