... thermocouple etc.3. Extruding deviceIt is composed of hydro-cylinder,extrude piston,sealant cylinder,glue head block,dispensing head etc.4. ... running as the setting program, which means the action of cylinder for pressure rollers, pressure roller press aluminium spacer and ... and then coat butyl on aluminium spacer. When the end of aluminium spacer will reach pressure rollers, the rollers lift, ...