Galvanized coating layer production line

Abstract

A galvanized coating layer production line is disclosed. The production line comprises sequentially arranging, according to a workflow, a sand-blasting machine, a fluxing machine, a first air knife, a preheating device, a hot-dip bath, a second air knife, and a cooling chamber. The fluxing machine, the first air knife, the preheating device, the hot-dip bath, and the second air knife are each provided with a moving passageway through which a workpiece may pass; and disposed between the apparatus are rolling conveyors along which workpieces move. Rebar is able to lie flat as it moves one-by-one between the apparatus during the process. This allows for highly efficient production and for the electroplating of long rebar. The production line is easy both to expand and to improve.

What is claimed is: 
     
         1 . A galvanized coating layer production line, comprising a sand-blasting machine, a fluxing machine, a first air knife, a preheating device, a hot-dip bath, a second air knife, and a cooling chamber which are arranged sequentially according to a workflow; the fluxing machine, the first air knife, the preheating device, the hot-dip bath, and the second air knife being each provided with a moving passageway through which a workpiece passes; between the devices being provided with a rolling conveyer on which the workpiece run. 
     
     
         2 . The galvanized coating layer production line as claimed in  claim 1 , wherein the fluxing machine includes upper and lower rows of fluxing heads, and between the upper and lower rows of fluxing heads is the moving passageway for the workpiece to pass through the fluxing machine 
     
     
         3 . The galvanized coating layer production line as claimed in  claim 1 , wherein the first air knife and the second air knife have an identical structure, the first air knife comprises a triangular frame, an air wall of the triangular frame is provided with a plurality of air nozzles, a middle portion of the triangular frame is defined as the moving passageway for the workpiece to pass through the first air knife. 
     
     
         4 . The galvanized coating layer production line as claimed in  claim 1 , wherein the preheating device comprises a support, a guide pipe, and a heating wire, the guide pipe is installed on the support, the support is fixed on the ground, the heating wire is wound on the guide pipe, the guide pipe is provided with a plurality of guide holes, and the guide holes are the moving passageway for the workpiece to pass through the preheating device. 
     
     
         5 . The galvanized coating layer production line as claimed in  claim 1 , wherein the hot-dip bath comprises a big bath, a small bath, and an electroplating solution circulatory system, the small bath is placed in the big bath, an upper portion of the small bath is beyond a top of the big bath, two opposing walls of the small bath, beyond the big bath, are formed with through holes respectively, the through holes of the two opposing walls of the small bath are disposed at an axis, and the through holes of the two opposing walls of the small bath are the moving passageway for the workpiece to pass through the hot-dip bath. 
     
     
         6 . The galvanized coating layer production line as claimed in  claim 1 , wherein between the sand-blasting machine and the fluxing machine, between the first air knife and the preheating device, between the preheating device and the hot-dip bath, between the second air knife and the cooling chamber is provided with the rolling conveyer on which the workpiece run.