METHOD OF RECOVERY OF ELASTIC-PLASTIC PROPERTIES OF INDUSTRIAL RUBBER ARTICLES BY TREATMENT IN ELECTROMAGNETIC FIELD Russian patent published in 2020 - IPC B29B17/00 H05B6/64 

FIELD: physics.

SUBSTANCE: invention relates to the electrotechnical processes of modifying dielectric materials, in particular to the reparative treatment of rubber articles, to the sealing characteristics of which there are high requirements, and can be used in maintenance and repair of pipeline, control and shutoff valves in power and transport machine building. According to this method, products are supplied to working zone, in which microwave electromagnetic field is generated, treatment by microwave field of electromagnetic field of article and removing the processed article from the working area, wherein the microwave electromagnetic field is generated by means of radiators in the form of horn antennae, wherein the degree of exposure of the electromagnetic field to the article is controlled. In this case when processing products with varying cross-sectional height profile of the radiating horn antenna controllably moved on the distance from the outer surface of the article, wherein the energy flux density of the microwave electromagnetic field is (17–17.5) × 104 mcW/cm², product kept under influence of microwave electromagnetic field for 2–2.5 minutes, then, the article is moved if its size exceeds the dimensions of the radiating horn antenna in the opening plane so that the next section of the article is found in the zone of exposure of the microwave electromagnetic field and no overlapping of the treated sections of the article occurs. In case of UHF electromagnetic field effect on products of annular shape, product turning angle is determined from the relation: α = 2arcSin(H/D), where H is length of vertical side of emitting horn antenna, mm; D is article average diameter, mm; α is product turning angle, deg.

EFFECT: technical result consists in extension of service life and repeated use of sealing elements of pipeline valves from technical rubber due to stable recovery of their elasticity as a result of structure modification by exposure to microwave electromagnetic field.

1 cl, 2 dwg, 1 tbl