A kind of refrigerator box or box door preparation method

Abstract

The invention discloses a preparation method of a body or a door of a refrigerator. The method finishes the preparation of the body or the door of the refrigerator through such process steps as preheating, vacuumizing, pressure maintaining injection, pressure maintaining foaming and air cooling; and because of the effect of negative pressure, when polyether glycol, polyester glycol, cyclopentane and isocyanate are mixed to be injected in a body shell or a door shell, microbubbles generated in the foaming can be timely and quickly discharged, so that the resistance effect generated by the growing expansion of the microbubbles is prevented, the polyurethane foaming speed is quickened, and the insulating performance of the refrigerator is improved.

Description

technical field

[0001] The invention relates to the technical field of refrigerators, in particular to a method for preparing a refrigerator box or box door. Background technique

[0002] As a general household appliance, a refrigerator has been widely used in people's daily life, wherein the refrigerator includes a cabinet, a cabinet door and a corresponding refrigeration system. For the box body and the box door, in order to ensure a good heat insulation effect, the inside of the box shell and the box door shell are filled with polyurethane heat insulation layer.

[0003] In the process of refrigerator production and processing, the faster the polyurethane foaming speed, the finer the cells, the lower the thermal conductivity of the polyurethane insulation layer, that is, the better the heat insulation effect of the polyurethane insulation layer; however, in the actual production and processing process , because the growth and expansion of the microbubbles generated durin...