Brushing method Use a paintbrush to apply the adhesive onto the bonding surface along one direction. Its advantages are that it is easy to use, requires no special equipment, and can be applied to the bonding of various complex parts. The disadvantage is that the coating thickness is uneven and the production efficiency is low.
Scraping method with a knife Pour the adhesive liquid onto the bonding surface, and pass the plate under the blade. The blade and the knife rod can be adjusted to control the thickness of the adhesive layer on the plate. The distance between the blade edge and the surface of the bonded part is the thickness of the adhesive layer. Sometimes the blade edge can also be processed into a serrated shape, a square shape, etc. Its advantage is that the method is simple and the effect is relatively good. The disadvantage is that the coating thickness is uneven and the quality is not stable enough.
Roller coating method Use an adhesive roller to evenly apply the adhesive onto the bonding surface. Its advantages are high work efficiency, an even adhesive layer, and easy automation of the operation.
Spraying method Use various spray painting equipment to spray the adhesive onto the bonding surface. Its advantages are fast adhesive application speed and easy automation. The disadvantage is that the sprayed adhesive mist is harmful to the health of the operators.
Hot-melting method Put the hot-melt adhesive into the gun body for heating and melting, then extrude it from the gun head onto the bonded surface, and then quickly lap it.