Patent ID: 11904342
Assignee: AQUACAR GROUP SP. Z O.O.
Field: Chemical engineering (Chemistry)
Classification: CPC B  C  F | IPC B  C

Claim 0:
1. A system (1, 101, 201) for spraying hot-melt adhesive onto glued surfaces comprising
a melter (61) to heat hot-melt adhesive,
an air compressor (60, 260),
a power and control system (63, 263) and
a gun (10, 110) having a nozzle (20) with a hot-melt adhesive outlet or orifice (21) and a compressed air outlet (23) and connected to the melter (61, 261) by a pipe (53) with screw connectors (54, 55), through which a hot-melt adhesive being heated flows, and connected to the air compressor (60, 260) by an air pipe (56) with screw connectors (57, 58) through which a pressurized compressed air flows,
wherein the pipe (53) through which flows the hot-melt adhesive having a viscosity between 2500 mPa·s and 7000 mPa·s and a temperature between 120° C. and 200° C., and a density between 0.8 kg/dcm3 and 1.4 kg/dcm3, and the air pipe (56) are fitted in an insulating layer of a hose (50), and wherein the throughput of the pipe (53) through which the hot-melt adhesive being heated flows is between 0.5 kg/h and 1.5 kg/h, while the air pipe (56) has a throughput between 0.1 m3/min and 0.6 m3/min
and wherein at least one heater (32) and at least one temperature sensor (37) are located inside walls of the gun (10), which are in contact with a hot-melt adhesive container (24), and the at least one heater (32) and the at least one temperature sensor (37) are fitted in recesses (33, 38), respectively, placed in a wall (12) separating the hot-melt adhesive container (24) from an inner chamber of the gun (10)
and wherein a heater (232) is fitted by the nozzle (120) of the gun (110) and the at least one temperature sensor (37) is directly connected to a temperature controller of the power and control system (63, 263) controlling work of an adhesive heater (265) placed in the melter, with the goal of allowing a response of the adhesive heater (265) controlled by the power and control system (63, 263) to adhesive temperature fluctuations in the hot-melt adhesive container of the gun, and the inner chamber of the gun (10, 110) comprises a button (40, 140) pivotally mounted to a gun housing (11, 111) and protruding partially beyond the housing (11, 111), to which a pusher (43) with a needle is attached, the end of which reaches the hot-melt adhesive outlet or orifice (21) in order to prevent the adhesive from flowing out when the gun (10, 110) is not in use and inside of the inner chamber of the gun (10) is situated an inner air line (26) with a valve (28) that shuts down the flow of compressed air through the inner air line (26) when the button (40) acts on the valve (28), whereas the inner air line (26) connects an air ferrule (29) of the gun (10) with air channels (25) connected to the compressed air outlet.