GALVANISING AND EPOXY-COATING PRODUCTION LINE

Abstract

A galvanising epoxy-coating production line includes a sandblasting machine an assisting plating machine, a first air knife, a first pre-heater, a hot dip tank, a second air knife, a second pre-heater, an epoxy spray chamber, and a cooling chamber, arranged sequentially in order of workflow. The assisting plating machine, the first air knife, the first pre-heater, the hot dip tank, the second air knife, the second pre-heater, and the epoxy spray chamber are provided with moving channels through which workpieces can pass. Between the devices is provided with a rolling conveyer on which the workpieces run. The production efficiency is high. The electroplated rebars are long.

Description

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to a production line, and more particularly to a galvanising and epoxy-coating production line.

2. Description of the Prior Art

A coating production line is used for metal and non-metal to be coated with a protection layer or a decoration layer. The quality of coating will influence the appearance of the product and the capability of corrosion-resistance and weather-resistance. With the development of industrial technology, a coating line is developed from by hand to automation. The coating line is widely used in various fields. As shown in FIG. 8, a conventional galvanising coating production line comprises the process of pretreatment 1′, assisting plating 2′, preheating 3′, galvanising 4′, cooling 5′, and passivation 6′. It is operated by a suspension crane (or an electric hoist operated by hand) to hang workpieces (such as rebars). Because this conventional production line uses an electric hoist or a trolley conveyer to hang workpieces, the length of the workpieces to be electroplated is limited. For large-sized workpieces, the depth of the galvanising tank must be deep. As a result, the equipment is large in size, and the production efficiency is low.

Accordingly, the inventor of the present invention has devoted himself based on his many years of practical experiences to solve these problems.

SUMMARY OF THE INVENTION

The primary object of the present invention is to provide a galvanising and epoxy-coating production line. The production efficiency is high. The electroplated rebars can be long.

In order to achieve the aforesaid object, the galvanising and epoxy-coating production line of the present invention comprises a sandblasting machine, an assisting plating machine, a first air knife, a first pre-heater, a hot dip tank, a second air knife, a second pre-heater, an epoxy spray chamber, and a cooling chamber which are arranged sequentially according to a workflow. The assisting plating machine, the first air knife, the first pre-heater, the hot dip tank, the second air knife, the second pre-heater, the epoxy spray chamber, and the cooling chamber are each provided with a moving channel through which workpieces can pass. Between the devices is provided with a rolling conveyer on which the workpieces run.

Preferably, the assisting plating machine includes upper and lower rows of assisting plating heads. Between the upper and lower rows of assisting plating heads is the moving channel for the workpieces to pass through the assisting plating machine

Preferably, 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 channel for the workpieces to pass through the first air knife.

Preferably, the first pre-heater and the second pre-heater have an identical structure. The first pre-heater 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. The guide holes are the moving channel for the workpieces to pass through the first pre-heater.

Preferably, the hot dip tank comprises a big tank, a small tank, and an electroplating solution circulatory system. The small tank is placed in the big tank. An upper portion of the small tank is beyond a top of the big tank. Two opposing walls of the small tank, beyond the big tank, are formed with through holes respectively. The through holes of the two opposing walls of the small tank are disposed at an axis. The through holes of the two opposing walls of the small tank are the moving channel for the workpieces to pass through the hot dip tank.

Preferably, the epoxy spray chamber includes upper and lower rows of epoxy spray heads. Between the upper and lower rows of epoxy spray heads is the moving channel for the workpieces to pass through the epoxy spray chamber.

Preferably, between the sandblasting machine and the assisting plating machine, between the first air knife and the first pre-heater, between the first pre-heater and the hot dip tank, between the second pre-heater and the epoxy spray chamber, and between the epoxy spray chamber and the cooling chamber is provided with the rolling conveyer on which the workpieces run.

As the assisting plating machine, the first air knife, the first pre-heater, the hot dip tank, the second air knife, the second pre-heater, and the epoxy spray chamber are provided with the moving channels through which workpieces can pass, rebars can lie flat and pass one-by-one through the devices in the order of workflow. The production efficiency is high, the electroplated rebars are long, and each device can be added or removed according to coating requirements. The production line is structurally compact, highly modular, and extension or improvement thereof is simple.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a structural schematic view of the present invention;

FIG. 2 is a perspective schematic view of the assisting plating machine of the present invention;

FIG. 3 is a perspective schematic view of the first pre-heater of the present invention;

FIG. 4 is a perspective schematic view of the hot dip tank and the second air knife of the present invention;

FIG. 5 is a perspective schematic view of the epoxy spray chamber of the present invention;

FIG. 6 is a perspective schematic view of the cooling chamber of the present invention;

FIG. 7 is a schematic view of the working process of the present invention; and

FIG. 8 is a structural schematic view of a conventional galvanising coating production line.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

Embodiments of the present invention will now be described, by way of example only, with reference to the accompanying drawings.

As shown in FIG. 1, the present invention discloses a galvanising and epoxy-coating production line. The galvanising and epoxy-coating production line comprises a sandblasting machine 1, an assisting plating machine 2, a first air knife 3, a first pre-heater 4, a hot dip tank 5, a second air knife 6, a second pre-heater 7, an epoxy spray chamber 8, and a cooling chamber 9 which are arranged sequentially according to a workflow.

The assisting plating machine 2, the first air knife 3, the first pre-heater 4, the hot dip tank 5, the second air knife 6, the second pre-heater 7, the epoxy spray chamber 8, and the cooling chamber 9 are each provided with a moving channel through which workpieces can pass. Between the sandblasting machine 1 and the assisting plating machine 2, between the first air knife 3 and the first pre-heater 4, between the first pre-heater 4 and the hot dip tank 5, between the second pre-heater 7 and the epoxy spray chamber 8, and between the epoxy spray chamber 8 and the cooling chamber 9 is provided with a rolling conveyer 10 on which the workpieces run.

As shown in FIG. 2, the assisting plating machine 2 includes upper and lower rows of assisting plating heads, namely, a row of upper assisting plating heads 21 and a row of low assisting plating heads 22. Between the row of upper assisting plating heads 21 and the row of lower assisting plating heads 22 is the moving channel for the workpieces to pass through the assisting plating machine 2. In this embodiment, there are two assisting plating machines 2.

As shown in FIG. 4, the first air knife 3 and the second air knife 6 have an identical structure. The second air knife 6 comprises a triangular frame 61 and an air pipe 62. An air wall of the triangular frame 62 is provided with a plurality of air nozzles 63. A middle portion of the triangular frame 61 is defined as the moving channel for the workpieces to pass through the second air knife 6.

As shown in FIG. 3, the first pre-heater 4 and the second pre-heater 7 have an identical structure. The first pre-heater 4 comprises a support 41, a guide pipe 42, and a heating wire 43. The guide pipe 42 is installed on the support 41. The support 41 is fixed on the ground. The heating wire 43 is wound on the guide pipe 42. The guide pipe 42 is provided with a plurality of guide holes 421. The guide holes 421 are the moving channel for the workpieces to pass through the first pre-heater 4.

As shown in FIG. 4, the hot dip tank 5 comprises a big tank 51, a small tank 52, and an electroplating solution circulatory system 53. The small tank 52 is placed in the big tank 51. An upper portion of the small tank 52 is beyond a top of the big tank 51. Two opposing walls of the small tank 52, beyond the big tank 51, are formed with through holes 521, 522 respectively. The through holes 521, 522 of the two opposing walls of the small tank 52 are disposed at an axis. The through holes 521, 522 of the two opposing walls of the small tank 52 are the moving channel for the workpieces to pass through the hot dip tank 5.

As shown in FIG. 5, the epoxy spray chamber 8 includes upper and lower rows of epoxy spray heads, namely, a row of upper epoxy spray heads 81 and a row of lower epoxy spray heads 82. Between the row of upper epoxy spray heads 81 and the row of lower epoxy spray heads 82 is the moving channel for the workpieces to pass through the epoxy spray chamber 8.

As shown in FIG. 6, the cooling chamber 9 comprises an upper lid 91, a water tank 92, a plurality of shower heads 93, and a water inlet pipe 94. The water inlet pipe 94 is connected with a water source. The upper lid 91 is to cover the shower heads 93. The water tank 92 is installed on the ground and located under the shower heads 93.

As shown in FIG. 1 and FIG. 7, the working process of the present invention is that the workpieces (rebars) 30 pass through the sandblasting machine 1, the assisting plating machine 2, the first air knife 3, the first pre-heater 4, the hot dip tank 5, the second air knife 6, the second pre-heater 7, the epoxy spray chamber 8, and the cooling chamber 9 sequentially. Finally, the processed workpieces 30 are collected on a rebar collection rack 20 disposed at the tail end of the production line. Each working process is controlled by a unified control electrical box. The specific steps are as follows:

1. the workpieces 30 pass through the sandblasting machine 1 for removing oil and dust;

2. the workpieces 30 pass through the assisting plating machine 2 and the first air knife 3 for applying a plating assistant agent evenly and drying so that electroplating solution can be adhered to the surfaces of the workpieces 30 effectively when electroplated;

3. the workpieces 30 pass through the first pre-heater 4 for drying the surfaces of the workpieces 30 by heat;

4. the workpieces 30 enter the hot dip tank 5 from the through hole 521 of the wall of the hot dip tank 5 for electroplating the surfaces of the workpieces 30;

5. the workpieces 30 pass through the second air knife 6 and the second pre-heater 7 for drying and solidifying the electroplating solution on the surfaces of the workpieces 30;

6. the workpieces 30 pass through the epoxy spray chamber 8 for spraying epoxy on the surfaces of the workpieces 30; and

7. the workpieces 30 pass through the cooling chamber 9 for cooling and passivating to get the finished products, and the finished products are delivered to the rebar collection rack 20.

The feature of the present invention is that each device is provided with a moving channel through which the workpieces can pass. The aforesaid structure is just a preferred embodiment of the present invention. The length of the rolling conveyer can be changed according to the demand.

Although particular embodiments of the present invention have been described in detail for purposes of illustration, various modifications and enhancements may be made without departing from the spirit and scope of the present invention. Accordingly, the present invention is not to be limited except as by the appended claims.

Claims

1. A galvanising and epoxy-coating production line, comprising a sandblasting machine, an assisting plating machine, a first air knife, a first pre-heater, a hot dip tank, a second air knife, a second pre-heater, an epoxy spray chamber, and a cooling chamber which are arranged sequentially according to a workflow; the assisting plating machine, the first air knife, the first pre-heater, the hot dip tank, the second air knife, the second pre-heater, the epoxy spray chamber, and the cooling chamber being each provided with a moving channel through which workpieces pass; between the devices being provided with a rolling conveyer on which the workpieces run.

2. The galvanising and epoxy-coating production line as claimed in claim 1, wherein the assisting plating machine includes upper and lower rows of assisting plating heads, and between the upper and lower rows of assisting plating heads is the moving channel for the workpieces to pass through the assisting plating machine

3. The galvanising and epoxy-coating 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 channel for the workpieces to pass through the first air knife.

4. The galvanising and epoxy-coating production line as claimed in claim 1, wherein the first pre-heater and the second pre-heater have an identical structure, the first pre-heater 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 channel for the workpieces to pass through the first pre-heater.

5. The galvanising and epoxy-coating production line as claimed in claim 1, wherein the hot dip tank comprises a big tank, a small tank, and an electroplating solution circulatory system, the small tank is placed in the big tank, an upper portion of the small tank is beyond a top of the big tank, two opposing walls of the small tank, beyond the big tank, are formed with through holes respectively, the through holes of the two opposing walls of the small tank are disposed at an axis, the through holes of the two opposing walls of the small tank are the moving channel for the workpieces to pass through the hot dip tank.

6. The galvanising and epoxy-coating production line as claimed in claim 1, wherein the epoxy spray chamber includes upper and lower rows of epoxy spray heads, between the upper and lower rows of epoxy spray heads is the moving channel for the workpieces to pass through the epoxy spray chamber.

7. The galvanising and epoxy-coating production line as claimed in claim 1, wherein between the sandblasting machine and the assisting plating machine, between the first air knife and the first pre-heater, between the first pre-heater and the hot dip tank, between the second pre-heater and the epoxy spray chamber, and between the epoxy spray chamber and the cooling chamber is provided with the rolling conveyer on which the workpieces run.