FIELD: shoe industry, in particular, processes for manufacture of shoes having cast bottom, more particular, reinforcement of cast fastening of bottom part to top part materials which do not sufficiently adhere to bottom part materials.
SUBSTANCE: method involves putting shoe blank onto casting block; knocking off seam on shoe blank trace; applying polyurethane glue onto edges of shoe top part blank; drying glue layer under natural conditions; injecting casting mixture and bringing bottom part to shoe blank. Glue layer is applied twice to top part edge. For first gluing process, 8-10% concentration glue is used, with following drying of glue layer under natural conditions during 3-5 min. For second gluing process, 20-22% concentration glue is used, with following drying of glue layer during 3-6 min combined with intensified drying stage performed during 1 min by means of air flow having temperature of 60-65 C at flow velocity of 3-4 m/s and stage of drying under natural conditions during 2-5 min. Before closing of casting mold and casting of bottom part to shoe top blank, glue film is thermally activated during 5-8 s by feeding onto shoe blank trace of air flow heated to temperature of 110-140 C.
EFFECT: increased strength of cast fastening of bottom part to shoe top blank and improved quality of shoes.
1 dwg, 1 tbl, 2 ex
