KR20010000056A - A roll forming apparatus of composite pipe - Google Patents

Abstract

PURPOSE: A roll forming device of a complex pipe is provided to gradually cover an aluminum plate onto the outer face of an inner pipe while the inner tube is sustained in a perfect circle through improving the structure of a roll. CONSTITUTION: Lower rolls loading an aluminum plate(120) and formed in a specific radius of curvature rotate at a uniform speed. Upper rolls contacting with the lower rolls have grooves for inserting an inner pipe(130) to the circumference. Another lower rolls placed in the rear of the lower rolls and upper rolls, rotating at a uniform speed and loading complex pipe covered with the aluminum plate are formed in a specific radius of curvature. The complex pipe is guided by upper guide rolls at the upper portion of the complex pipe. The complex pipe is guided at the side by side guide rolls.

Description

A roll forming apparatus of composite pipe

The present invention relates to a roll forming apparatus for a composite pipe, and more particularly, to a synthetic resin pipe that is continuously extruded and supplied as an inner layer, and to a belt-shaped aluminum plate that is continuously supplied as an intermediate layer. It is related with the roll forming apparatus which coats integrally.

In general, copper pipes have been mainly used for heating piping. However, copper pipes have a high risk of corrosion and scale generation, and especially because of their high price, composite pipes coated with synthetic resin on the inner and outer surfaces of metal pipes are widely used. have.

Various methods have been known regarding the manufacturing method and the manufacturing apparatus of the above composite pipe, there is a pipe manufacturing method disclosed in Republic of Korea Patent Application No. 7077 1994.

1 is a process diagram showing the process of the conventional pipe manufacturing method described above, the conventional overall process, first, the inner tube 11 having a predetermined diameter is extruded through the extruder 20, the extruded inner tube 11 is Cooling and solidification through the cooling means 21, the adhesive 11a is applied to the outer surface of the inner tube 11 through the adhesive coating means 22.

In addition, the outer surface of the inner tube 11 is covered with an aluminum tube 12, the aluminum tube 12 is formed by pipe through the roller 24, the aluminum tape supplied from the aluminum tape supply device 223, the seam The part is welded using the welding means 25, the welding part is cooled by the cooling means 26, and the aluminum tube 12 is heated through the adhesive means 28 by heating the outer surface through the heating means 27. The adhesive 12a is applied, and the outer surface of the adhesive 12a is covered by the extrusion means 29.

According to the conventional pipe manufacturing method as described above, as shown in Figure 2, during the roll forming process, to produce a composite pipe while making the aluminum plate to some extent in the form of a pipe using a plurality of rolls, and put the inner pipe made of synthetic resin. do.

However, in the roll forming process for forming the metal tube 12 on the outer surface of the synthetic resin inner tube 11 during the process of manufacturing the conventional composite pipe, first, a strip-shaped aluminum plate is formed into a plurality of rolls 30, 31, 32, 33,34,35) and gradually bend in the pipe state to the state that the pipe shape is prepared to some extent to put the inner pipe 11 of the resin into the pipe.

However, due to interference with the rolls 30, 31, 32, and 33 that are continuously arranged and bending the aluminum plate, the synthetic resin inner tube 11 cannot be inserted into the pipe from the first roll 30, and the fifth roll ( 34) Since the inner pipe 11 of the synthetic resin material must be folded into the pipe, the inner pipe 11, which is conveyed from the upper side of the roll, is suddenly bent in the upper side of the fourth roll 33 and enters the pipe, so the inner pipe 11 is in a rounded state. Frequently, the product was not crushed and crushed, resulting in product defects.

In addition, in order to solve the above problems, in order to supply the inner pipe 11 of the synthetic resin material with a gentle inclination, it is inevitable to lengthen the line to which the inner pipe 11 is supplied, thus lengthening the line of the entire composite pipe manufacturing apparatus. There was a problem that the line could not be made compact because of the loss.

The present invention has been made to solve the above problems, an object of the present invention is to improve the structure of the roll forming apparatus, the aluminum plate and the inner plate of the inner tube progressively from the initial roll at the same time as the transfer of the aluminum plate and the inner tube The aluminum plate is coated while the inner tube maintains the origin.

Another object of the present invention is to make the entire composite pipe manufacturing apparatus including the roll forming apparatus compact by supplying and conveying the inner tube without being inclined and supplying and conveying in a straight line.

Still another object of the present invention is that the inner pipe is broken or the composite pipe is damaged due to the unbalance of the feed rate during the transfer of the aluminum plate and the inner tube and the formation of the composite pipe by synchronizing the transfer of the aluminum plate and the inner tube and the rotation of the roll with the same power source. It is to solve the bad factor of.

1 is a process chart showing an example of a conventional pipe manufacturing method.

2 is a block diagram of a conventional forming roll.

3 is a plan view of a roll forming apparatus according to the present invention.

4 is a side view of a roll forming apparatus according to the present invention.

5 is a configuration diagram of the forming roll according to the present invention, showing the completion stage of the composite pipe.

* Explanation of symbols for the main parts of the drawings

40: roll mounting portion 41: power transmission portion 42: material supply portion 43: reducer

44: angle changer 45: universal joint 46: washing machine 47: cutter

48: scrap winder 49: inner guider 50, 60, 70, 80, 90, 100, 110:

1, 2, 3, 4, 5, 6, 7 roll 51, 61, 71, 81, 91, 101, 111: Lower roll

52,62,72,82,92,102,112: Top roll 53,63,73,83: Groove 93,103,113:

Guide roll 120: aluminum plate 130; Inner tube 140,141,142,143: Guide roll

150: welding machine 160: heater 170: sizing machine

The present invention provides a roll forming apparatus for coating a band-shaped aluminum plate on the outer surface of a synthetic resin inner tube using a plurality of rolls, the aluminum plate 120 is rotated at a constant speed by a same power source and has a predetermined radius of curvature. Grooves 53 and 63 contacting the lower rolls 51, 61, 71 and 81 with the same curvature radius as the lower rolls 51, 61, 71 and 81 and allowing the inner tube 130 to enter the circumferential surface. Top rolls 52, 62, 72, 82 with, 73, 83, and rear sides of the bottom rolls 51, 61, 71, 81 and top rolls 52, 62, 72, 82. Lower rolls (91, 101, 111), which are located at and rotate at a constant speed by the same power source and have a certain curvature radius, and mount the composite pipe coated with the aluminum plate (120), and an upper portion of the composite pipe that guides the composite pipe from above. It is composed of guide rolls (92, 102, 112) and side guide rolls (93, 103, 113) for guiding the composite pipe from the side .

Hereinafter, with reference to the accompanying drawings illustrating a preferred embodiment of the present invention in detail.

Figure 3 is a plan view of the roll forming apparatus according to the present invention, Figure 4 is a side view of the roll forming apparatus according to the present invention, Figure 5 is a block diagram of a forming roll according to the present invention, showing the completion stage of the composite pipe to be.

As shown in Figure 3 and 4, the roll forming apparatus of the composite pipe according to an embodiment of the present invention is a roll mounting portion 40 to form an aluminum plate and a synthetic resin inner pipe as a composite pipe at the same time, and the roll installation It is largely comprised of the power transmission part 41 which transmits power to the part 40, and the material supply part 42 which supplies the aluminum plate 120 and the inner pipe | tube 130 to the roll installation part 40.

The power transmission unit 41 includes an electric motor, an reducer 43 provided on the output side of the electric motor, an angle changer 44 that changes the output from the reducer 43 to a 90 degree angle, and an angle change thereof. It is comprised by the universal joint 45 which transmits the output from the machine 44 to the roll installation part 40. As shown in FIG.

The material supply part 42 cuts the washing machine 46 and the aluminum plate 120 coming out of the washing machine 46 to clean the aluminum plate 120 supplied along the side with a predetermined width in the cutter 47. It consists of the scrap winder 48 which collect | recovers the back scrap, and the inner tube guider 49 which guides the synthetic resin inner tube 130 supplied.

The roll installation part 40 is provided with a plurality of rolls in series from the first roll 50 to the seventh roll 110 to form the aluminum plate 120 in the form of a pipe. The roll mounting portion 40 receives the same power from the universal joint 45 of the power transmission portion 41, the lower rolls 51, 61, 71, of the first roll 50 to the seventh roll 110, 81, 91, 101, 111 is rotated at a constant speed.

An aluminum plate 120 is mounted on the circumferential surfaces of the lower rolls 51, 61, 71, 81, 91, 101, and 111, and the lower rolls 51, 61, 71, 81, 91, 101, and 111 each have a predetermined radius of curvature. In order to form the aluminum plate 120 in the form of a pipe, the radius of curvature becomes smaller toward the rear side.

The upper rolls 52, 62, 72, 82 of the first roll 50 to the fourth roll 80 are the same as the lower rolls 51, 61, 71, 81 on which the aluminum plate 120 is mounted. Grooves 53, 63, 73 and 83 are provided to contact with a radius of curvature and allow the inner tube 130 to enter the circumferential surface. The upper rolls 52, 62, 72, and 82 must have grooves 53, 63, 73, and 83 for the inner tube 130 to enter the inner circumferential surface thereof. The rotation radius of the 72, 82 is twice the rotation radius of the lower rolls (51, 61, 71, 81). However, the upper rolls (52, 62, 72, 82) and the lower rolls (51, 61, 71, 81) are gradually formed in a pipe shape while conveying the aluminum plate (120) and the inner tube (130) at the same speed. Since the rotational speed of the upper rolls (52, 62, 72, 82) should be out between the axis of the upper rolls and the axis of the lower rolls so that the rotation speed of the lower rolls (51, 61, 71, 81) can be doubled A transmission (not shown) is installed.

The fifth, sixth, seventh rolls (90, 100, 110) are located on the rear side of the lower rolls (51, 61, 71, 81) and the upper rolls (52, 62, 72, 82) of the power transmission unit (41) It receives the same power from the universal joint 45 and rotates at a constant speed, and has lower rolls (91, 101, 111) for mounting a composite pipe having a constant radius of curvature and coated with an aluminum plate (120).

The upper side of the lower rolls (91, 101, 111) is provided with upper guide rolls (92, 102, 112) for guiding the composite pipe, side guide rolls (93, 103, 113) for guiding the composite pipe from the side to form a composite pipe shape Equipped.

First roll 50 and second roll 60, second roll 60 and third roll 70, between fifth roll 90 and sixth roll 100 and seventh roll 110 The rear side of the guide plate (140, 141, 142, 143) for guiding the aluminum plate 120 and the inner tube 130 from the side, respectively.

Between the sixth roll 100 and the seventh roll 110, a welder 150 is installed on the outer side of the inner tube 130 to weld the both ends of the aluminum plate 120 is completed in the longitudinal direction. .

On the rear side of the guide roll 143, a heater 160 is provided for heating the composite pipe to be smoothed to smooth the outer surface of the coated composite pipe.

On the far rear side of the roll mounting portion 40, a sizing machine 170 is provided to trim the outer surface of the composite pipe transferred from the heater 160 with a roll.

As described above, embodiments of the present invention have been described in detail, but the scope of the present invention is not limited thereto, and the scope of the present invention extends to the range substantially equivalent to one embodiment of the present invention.

According to the present invention, the aluminum sheet can be coated on the outer surface of the inner tube gradually from the initial roll at the same time as the aluminum plate and the inner tube are transferred, thereby providing a roll forming apparatus which can cover the aluminum plate while the inner tube maintains the roundness. .

In addition, according to the present invention, since the supply and the transfer of the inner tube may not be inclined and the supply and the transfer may be performed in a straight line, the entire composite pipe manufacturing apparatus including the roll forming apparatus may be compact.

In addition, according to the present invention, since the transfer of the aluminum plate and the inner tube and the rotation of the roll can be synchronized to be made by the same power source, the inner tube is broken or compounded due to the unbalance of the feed rate during the transfer of the aluminum plate and the inner tube and the forming of the composite pipe. It can eliminate the bad factor of pipe.

Claims (2)

In the roll forming apparatus for covering the band-shaped aluminum plate on the outer surface of the synthetic resin inner tube using a plurality of rolls, the lower rolls for rotating the aluminum plate 120 with a constant radius of curvature by the same power source (51, 61, 71, 81) and the grooves (53, 63, 73) in contact with the lower rolls (51, 61, 71, 81) with the same radius of curvature and the inner tube (130) can enter the circumferential surface The upper rolls 52, 62, 72, 82 with 83, and are located on the rear side of the lower rolls 51, 61, 71, 81 and the upper rolls 52, 62, 72, 82 Lower rolls (91, 101, 111) for mounting a composite pipe is rotated at a constant speed by a power source, has a constant radius of curvature and is coated with an aluminum plate (120), and upper guide rolls for guiding the composite pipe on the upper side of the composite pipe. (92, 102, 112), and the side guide rolls (93, 103, 113) for guiding the composite pipe from the side Roll forming device for composite pipe. The method of claim 1, Roll forming apparatus of the composite pipe, characterized in that the number of revolutions of the upper rolls (52, 62, 72, 82) is twice the number of revolutions of the lower rolls (51, 61, 71, 81).