Nozzles are the placement of plastic channel, is the last most important HR system. It control the function of the nozzle head, despite it having been placed in the nozzle or not. Nozzle it is classified into the form of heat van or van. The nozzle controls related to both the control of hot asphalt and time line close open mouth spray.-The technical requirements of the nozzle: + Against freezing and interrupts the flow of plastic. + No spinning or drip. + The smallest pressure Loss. + Dead flow area is the smallest. + Leave traces of mouth spray on the product is the smallest.
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