KR20040100570A - A Square Shape Pipe And Product System Apparatus - Google Patents

Abstract

PURPOSE: To provide an improved angulated pipe capable of solving such problems that conventional pipes are easily warped and bent due to weak pipe strength when length of the pipes is longer by maintaining further reinforced strength while decreasing thickness and increasing length, and a forming system of the angulated pipe. CONSTITUTION: In a forming system of angulated pipe sequentially comprising a strip uncoil unit(2), a strip end welding unit(3), a rotary type looper unit(4), a cylindrical pipe forming unit(5), a cooling unit(6), a pipe cutting unit(7) and a discharge unit, the forming system of angulated pipe is characterized in that an angulated pipe forming unit(10) for forming the cylindrical metal pipe into an angulated pipe(40), on which inner angled parts are respectively formed by bending each corners of the rectangular pipe inward perpendicularly after forming the cylindrical metal pipe formed by the cylindrical pipe forming unit into a rectangular pipe comprising upper and lower horizontal surfaces oppositely directed to each other and left and right vertical side surfaces oppositely directed to each other, is installed between the cooling unit, for cooling a cylindrical metal pipe formed by the cylindrical pipe forming unit, and the pipe cutting unit, for cutting the cooled pipe to certain size of length.

Description

Square pipe and its manufacturing system device {A Square Shape Pipe And Product System Apparatus}

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a square pipe and a molding manufacturing system apparatus thereof, wherein the continuously supplied iron strips are formed into square (quad) pipes, each corner of which is bent at right angles.

To explain this in more detail, the steel sheet strip wound in a roll shape ((Strip) is sequentially formed by the cylindrical pipe forming device portion while supplying and unwinding, and the formed cylindrical pipe is passed through the square pipe forming device portion. The present invention is to provide a square pipe and a molding manufacturing system thereof, wherein each corner of the square pipe is formed into an inward corner portion that is bent at right angles to the inside, while being molded into a square (quad) pipe by a square roller.

As illustrated in FIG. 4, the iron strip strip 30, which is maintained at a constant width and wound in a roll shape, is typically manufactured by molding a cylindrical pipe 31 or a square pipe 32 as illustrated in FIGS. 5A and 5B. .

Cylindrical pipe 31 as described above has no edges on the outside, so it looks smooth and neat, but it has a weak strength, so it has a shape that easily bends and bends even when the length is a little longer. There was a problem that it is not easy to use for such use, and the square pipe 32 has a square corner, so that the strength is somewhat stronger than the cylindrical pipe 31, but if the length is thin and long, it also bends easily. A crushing shape occurred.

Referring to the accompanying drawings, FIGS. 1A and 1B of a conventional pipe forming manufacturing system for forming and manufacturing a steel sheet strip 30 into a cylindrical pipe 31 as described above.

The conventional pipe forming manufacturing system includes a sheet steel strip uncoiler unit 2 and a sheet steel strip uncoiler unit 2 which are continuously supplied while releasing a pair of iron plate strips 30 wound and mounted in a roll shape. Iron plate strip end welding connecting device portion (3) for welding the front end of the iron plate strip (30) to be supplied in the preceding and the front end of the iron plate strip (30) to be fed in a single piece, and the iron plate strip (previously supplied) The end of the iron plate strip 30 to be supplied to the rear end and the trailing end that is supplied to the iron plate strip end portion welding connecting device portion 3 in a direction so as to be supplied while being continuously wound (winding) by a certain length of 30). A rotary type looper device portion 4 which continuously supplies the rolled-up iron sheet strip 30 wound during the integral welding to the cylindrical pipe forming device portion 5; Cylindrical metal pipes 31 or square pipes, which are continuously supplied through the rotary type looper device part 4, are maintained at a predetermined size (diameter) as illustrated in FIGS. 5A and 5B. Cylindrical pipe 31 formed by passing through a cylindrical pipe forming apparatus portion (5: or square pipe forming apparatus portion) to be molded into (32) and the cylindrical pipe forming apparatus portion (5: or square pipe forming apparatus portion). Alternatively, a pipe cutting device for cutting the cooling device portion 6 for cooling the square pipe 32 and the cylindrical pipe 31 or the square pipe 32 passing through the cooling device portion 6 by a predetermined length. Part 7 and the discharge device portion 8 for discharging the cylindrical pipe 31 or the square pipe 32 cut to a predetermined length by the pipe cutting device portion 7 to the outside on the forming line. It is.

In the conventional pipe forming manufacturing system device configured as described above, as illustrated in FIGS. 5A and 5B, a cylindrical pipe 31 or a square pipe 32 is formed and manufactured, and a conventional cylindrical pipe 31 or a square pipe is formed. (32) has a weak strength, so that even if the length is a little long, it is easy to bend and bend the shape, especially when using a cultivation of crops, such as pepper, long, thin, thicker and more rigid square pipe molding production I could not.

It is an object of the present invention to provide a square pipe and a molding production system apparatus thereof, which are further improved to solve the above problems.

The present invention is to pass the iron strip strip supplied from the iron strip strip uncoil device portion and the steel strip strip end welding connection portion and the rotary type looper device portion, to form a cylindrical pipe while passing through the cylindrical pipe forming device portion, the cylindrical pipe to the square pipe forming device portion It is an object of the present invention to provide a square pipe and a molding manufacturing system apparatus thereof in which inner corner portions are formed between the outer corner portions on both sides by bending each corner of the square at right angles.

It is another object of the present invention to provide a square pipe and a molding manufacturing system apparatus thereof, in which an inner corner shelf [each corner of a square is bent at right angles to further strengthen the strength so as not to be bent or bent even if it is long and thin.

Still another object of the present invention is to provide a square pipe forming device to the rear of the cylindrical pipe forming device in the conventional pipe forming manufacturing system device to facilitate additional installation in existing equipment, cylindrical pipe forming device Cylindrical pipes are molded and manufactured by continuously passing them through the square pipe forming unit to make square pipes so that the molding process can be carried out continuously. Cylindrical pipes or square pipes can be selectively molded and manufactured as necessary. To provide a square pipe molding manufacturing system apparatus.

The above and other objects of the present invention,

In the rectangular pipe 32 formed of the upper and lower horizontal surfaces 41 and the left and right vertical side surfaces 42, the corner pipes 40 are formed at each corner by forming an inner portion 46 that is bent inwardly. Is achieved.

Other above and other objects of the present invention,

Iron plate strips (2) and iron plate strips (2) that are supplied in line / recess from the iron plate strip (uncoil unit) (2) and continuously supplied while releasing the iron plate strip (30) wound and mounted in a roll shape ( Iron plate strip end welding connecting device portion (3) for welding the rear end and the tip of 30) integrally, while supplying the iron plate strip (30) supplied in advance by a predetermined length continuously while the iron plate strip end welding connection device While the unit 3 is integrally welded to the end of the iron plate strip 30 supplied in the inward direction and the trailing end, the wound iron plate strip 30 is supplied to the cylindrical pipe forming apparatus 5. Rotary type looper device portion (4), a circle for forming a cylindrical metal pipe 31 of the iron plate strip 30 continuously supplied through the rotary type looper device portion (4) Cooling device part 6 for cooling the cylindrical pipe 31 or the square pipe 32 formed through the cylindrical pipe forming device part 5, the cylindrical pipe forming device part 5, and the cooling device part ( 6) a pipe cutting device portion 7 which cuts the cylindrical pipe 31 passing by a predetermined length by a predetermined length, and a cylindrical pipe 31 cut to a predetermined length by the pipe cutting device portion 7 on a forming line. In the pipe forming system apparatus by sequentially installing the discharge device portion (8) for discharging to the outside of the

Between the cooling device unit 6 for cooling the cylindrical metal pipe 31 formed by the cylindrical pipe forming device unit 5 and the pipe cutting device unit 7 for cutting the cooled pipe to a predetermined length. In between, each corner of the rectangular pipe 32 which consists of the upper and lower horizontal surfaces 41 and the left and right vertical side surfaces 42 which face the cylindrical metal pipe 31 shape | molded by the cylindrical pipe forming apparatus part 5 is inward. It is achieved by the square pipe forming manufacturing system device (1) characterized by providing a square pipe forming device portion (7) which forms a square pipe (40) each formed into an inner corner portion (46) to be bent.

1A and 1B are a plan view and a front view showing an installation state of a square pipe manufacturing system apparatus according to the present invention.

Figure 2a and Figure 2b is a plan view and a front view showing an extract of the square pipe forming unit in the square pipe manufacturing system apparatus according to the present invention.

Figures 3a to 3f is an illustration showing sequentially the forming roller installed in the square pipe forming unit of the square pipe manufacturing system apparatus according to the present invention.

4 is an exemplary view showing an iron plate strip.

5 is a cross-sectional view showing a typical cylindrical pipe.

6 is an exemplary view showing a square pipe formed by the present invention.

Explanation of symbols on the main parts of the drawings

1. Square pipe manufacturing system unit 2. Steel strip strip coil unit

3. Welded connection part of steel strip strip 4. Rotary type looper device part

5. Frozen tube forming device part 6. Cooling device part

7. Pipe cutting device part 8. Discharge device part

10. Square pipe molding device part 11. First molding device part

12. 2nd molding apparatus part 13. 3rd molding apparatus part

14. 4th molding apparatus part 15. 5th molding apparatus part

16. 7th molding unit 18. 8th molding unit

19. Horizontal and vertical support roller unit 20. Power unit

30. Steel strip strip 31. Cylindrical pipe

40. Square pipe 43. Inward corner

The above and other objects of the present invention will be more clearly understood by the following detailed description based on the accompanying drawings.

1A to 3F are exemplary views showing a concrete example of the rectangular pipe manufacturing system device 1 according to the present invention, and FIG. 6 is a square pipe manufactured by the square pipe manufacturing system device 1. 1A and 1B are a plan view and a front view showing an installation state of the present invention, and FIGS. 2A and 2B are a plan view and a front view showing an angled pipe forming apparatus in the present invention, and FIG. 3A. 3F is an exemplary view showing a forming roller sequentially installed in the square pipe forming unit.

The square pipe manufacturing system device 1 according to the present invention, as illustrated in FIGS. 1A to 2B, is a steel sheet strip that provides a continuous release of a pair of iron sheet strips 30 wound and mounted in a roll shape. Steel plate strip end for integrally welding the coil device unit 2 and the front end of the iron plate strip 30 supplied earlier from the iron plate strip uncoil unit unit 2 and the iron plate strip 30 supplied later. The welding connector 3 and the predetermined length of the previously supplied iron sheet strip 30 are continuously supplied while being wound (wound), but the iron sheet strip end welding connector 3 is inclined. The rolled-up iron sheet strip 30 wound up during the welding of the back end supplied and the front end of the iron plate strip 30 supplied later is integrally attached to the cylindrical pipe forming apparatus part 5. Rotary type looper device portion 4 for supplying and the iron plate strip 30 continuously supplied through the rotary type looper device portion 4 to a predetermined size (diameter) as illustrated in Figure 5a Cylindrical pipe forming device portion 5 to be formed into a cylindrical metal pipe 31 to be maintained, and the cylindrical pipe 31 or the square pipe 32 is cooled by passing through the cylindrical pipe forming device portion (5) The main pipe forming apparatus 10 for forming the cooling device portion 6 and the cylindrical pipe 31 passing through the cooling device portion 6 into a square pipe 40 as illustrated in FIG. , The pipe cutting device part 7 for cutting the square pipe 40 formed by the square pipe forming device part 10 by a predetermined length, and the pipe cutting device part 7 is cut to a certain length by the pipe cutting device part 7. The cylindrical pipe 31 or the square pipe 32 on the forming line Discharge device portion 8 for discharging to the outside was installed sequentially.

In the square pipe manufacturing system device 1 according to the present invention, except for the square pipe forming device portion 10, the steel sheet strip uncoil device portion (2), the steel strip strip end welding connection device portion (3), rotary type looper device portion (4), the cylindrical pipe forming device portion 5, the cooling device portion (6), the pipe cutting device portion (7), the discharge device portion 8 is configured and operated in the same manner as the existing device, more detailed description thereof will be omitted. Let's do it.

In the square pipe manufacturing system device 1 according to the present invention, the square pipe forming device part 10, which is a main part of the present invention, is formed as illustrated in FIGS. 2A to 3F.

The square pipe forming device portion 10 is formed by the first molding device portion 11, the second molding device portion 12, and the third molding device on the apparatus frame 10-1, as illustrated in FIGS. 2A and 2B. Section 13, fourth molding apparatus section 14, fifth molding apparatus section 15, sixth molding apparatus section 16, seventh molding apparatus section 17, eighth molding apparatus section 18, The horizontal vertical support unit 19 and the discharge induction unit 19-1 were installed one by one, and behind them, the first molding unit 11, the third molding unit 13, and the fifth molding unit ( 15) A power unit 20 for rotating (actuating) each forming roller of the seventh molding unit 17 is provided.

The power unit 20 includes interlocking gears 23 at the rear of each of the first molding apparatus section 11, the third molding apparatus section 13, the fifth molding apparatus section 15, and the seventh molding apparatus section 17. ) Is installed in the mandrel at equal intervals rotatably installed interlocking shaft (22), and between the interlocking shaft (22) and the electric shaft (24) equipped with the electric gear (25) rotatably installed, respectively The gear 25 is meshed with the interlocking gears 23, and each interlocking shaft 22 is formed by the crankshaft 25 and the universal joints 24 and 26 by the first molding device part 11 and the third. Molding rollers 11-1, (13-1), (15-1), (17-1) provided in the molding apparatus section 13, the fifth molding apparatus section 15, and the seventh molding apparatus section 17. ), The motor 21 is installed on the outside of the interlocking shaft 22 on one side, and the starting gear 21-1 is mounted on the rotating shaft of the motor 21 to engage with the interlocking gear 23.

In particular, the first molding apparatus section 11, the third molding apparatus section 13, the fifth molding apparatus section 15, the seventh molding apparatus section 17, and the discharge induction apparatus section 19-1 are a pair. The molding roller was mounted vertically and vertically, and the 2nd molding apparatus part 12, the 4th molding apparatus part 14, the 6th molding apparatus part 16, and the 8th molding apparatus part 18 were a pair of shaping | molding. The rollers were horizontally mounted horizontally, and the horizontal vertical support unit 19 was equipped with a pair of vertical / horizontal rollers, respectively, before and after.

Each forming roller 11-1 mounted on the first molding apparatus part 11, the second molding apparatus part 12, the third molding apparatus part 13, and the fourth molding apparatus part 14 vertically or horizontally. ), (12-1), (13-1), and (14-1), as illustrated in Figs. 3A to 3D, each horizontal forming surface 30, 40, 30-1, ( 40-1) and the vertical molding surfaces 31, 41, 31-1, and 41-1 were kept in a gradually increasing state with a small curvature (curvature), and the horizontal molding surface 30 Cabinet molding at the corners where the ends of (40), (30-1), (40-1) and vertical forming surfaces (31), (41), (31-1) and (41-1) are connected to each other. Externally shaped curved protrusions 33, 34, 43, 44, 33-1, 34-1 on both sides of the curved protrusions 32, 42, 32-1, and 42-1. 1). (43-1) (44-1) were formed.

The sixth molding apparatus section 16, the seventh molding apparatus section 17, the eighth molding apparatus section 18, the horizontal vertical support apparatus section 19, and the discharge induction apparatus section 19-1 are in a horizontal or vertical state. The forming rollers 16-1, 17-1, 18-1, 19-2, 19-3 and 19-4, which are mounted in the furnace, are as shown in Figs. 3E and 3F. Each horizontal molding surface 30-2, 40-2 and vertical molding surfaces 31-2 and 41-2 were kept in a horizontal or vertical state with the largest curvature (curvature), and the horizontal molding surface 30 -2) 40-2 and edge portions of the vertical forming surfaces 31-2 and 41-2 are connected to each other so as to be external to both sides of the inner rectangular forming parts 32-2 and 42-2. Right angled parts 33-2, 34-2 and 43-2 and 44-2 were formed.

The operation relationship will be described below.

The iron plate strip uncoiler unit 2 is continuously supplied while the iron plate strip 30, which is wound and mounted in a roll shape, is released, and the iron strip strip end coil welding unit unit 3 is When the iron plate strip 30 that is supplied in advance in 2) is exhausted (dissipated), the front end of the iron plate strip 30 that is supplied in advance and the tip of the iron plate strip 30 supplied in the trailing line are integrally welded. , The rotary type looper device (4) is to be supplied while being continuously wound (winding) by a certain length of the iron plate strip 30 to be supplied, but the iron plate strip end welding connection unit (3) is supplied in the incline The wound rolled iron strip 30 wound during the integral welding of the end of the iron plate strip 30 supplied to the trailing end and the trailing end to the cylindrical pipe forming apparatus 5 The cylindrical pipe forming device part 5 is supplied continuously, and the iron plate script 30 continuously supplied through the rotary type looper device part 4 as illustrated in FIG. 5A has a predetermined size (diameter). It is molded into a cylindrical metal pipe 31 is maintained as, the cooling device portion 6 is passed through the cylindrical pipe forming device portion 5 to cool the molded cylindrical pipe 31.

Since the forming process of the cylindrical pipe 31 as described above is well known in the art, more detailed description thereof will be omitted.

The cylindrical pipe 31 passing through the cooling device part 6 is supplied to the square pipe forming device part 10, which is a main part of the present invention, and is formed into a square pipe 40 as illustrated in FIG. When the motor 21 of the power unit 20 is operated, the start gear 21-1 rotates to rotate the interlocking gear 23 engaged therewith, and is driven by the rotation of the preceding interlocking gear 23. The gear 25 and the interlocking gears 23 rotate simultaneously, and the crankshafts 25 and the forming roller connected to the universal joints 24 and 26 together with the interlocking shafts 22 by the interlocking gears 23. (11-1), (13-1), (15-1) and (17-1) rotate.

Molding rollers 11-1 and 13-1 of the first molding apparatus part 11, the third molding apparatus part 13, the fifth molding apparatus part 15, and the seventh molding apparatus part 17. Cylindrical pipes 31 formed in the frozen tube forming apparatus 5 and cooled by the cooling apparatus 6 in the state in which (15-1) and (17-1) are rotating are illustrated in FIG. 3A. As described above, the second molding device part 12, the third molding device part 13, and the fourth molding device part (2) are introduced into the molding roller 11-1 of the first molding device part 11 provided up and down. 14), the fifth molding device part 15, the sixth molding device part 16, the seventh molding device part 17, and the eighth molding device part 18 are formed in a square pipe 40 while being sequentially passed. It is done.

1st molding apparatus part 11, 2nd molding apparatus part 12, 3rd molding apparatus part 13, 4th molding apparatus part 14, 5th molding apparatus part 15, 6th molding apparatus part (16) Molding rollers (11-1), (12-1), (13-1), (14-1), (15) of the seventh molding apparatus part (17), the eighth molding apparatus part (18) Each horizontal forming surface 30 held in a state where the curvature (curvature) is gradually increased while the cylindrical pipe 31 sequentially passes through -1), 16-1, and 17-1. (40), (30-1), (40-1) and the upper and lower surfaces of the cylindrical pipe (31) by the vertical forming surfaces (31), (41), (31-1) and (41-1). And the upper and lower sides and both sides are gradually formed in horizontal and vertical conditions in a rectangular state in which both sides are constricted while the top / bottom and both sides are curved, and each corner portion is formed at the corner shaped curved protrusion 32. (42) (32-1) (42-1) and the externally curved curved protrusions on both sides (33) (34), (43) (44), (33-1) (34-1), (43 -1) by (44-1) As shown in FIG. 6, the inner and outer portions 44 are moved to both sides of the inner portion 46 at four corners at which the upper and lower horizontal surfaces 41 and the left and right vertical side surfaces 42 are connected to each other, as illustrated in FIG. 6. (45) is discharged while being molded into the square pipe 40, the inward corner portion 43 is formed.

The square pipe 40 formed by passing through the eighth molding unit 18 is formed on the horizontal vertical roller unit 19 and the discharge induction roller unit 19-1 by the forming rollers 15-1 and 17-1 ( It passes through the horizontal molding surfaces 30-2 and 40-2 and the vertical molding surfaces 31-2 and 41-2 formed in 19-2) and 19-3.

6 through the square pipe forming device unit 10, the shaped square pipe 40 is cut by a predetermined length while being supplied to the pipe cutting device unit 7, and the pipe cutting device unit ( The cylindrical pipe 31 cut to a certain length by 7) is discharged to the outside on the forming line by the discharge device portion 8, by the pipe cutting device portion 7 and the discharge device portion (8) Since the process is well known in the art, more detailed description thereof will be omitted.

As described above, the square pipe according to the present invention is provided with an inward corner portion 43 bent inwardly at each corner of the square pipe, so that even if the length is thin and long, it is possible to provide a square pipe that is significantly enhanced in strength so as not to be bent or broken. In addition, since the square pipe forming apparatus is installed in the square pipe forming manufacturing system unit, it can be easily installed and used in an existing facility, and is molded by the cylindrical pipe forming unit. Since the cylindrical pipe is passed through the square pipe forming unit and manufactured into a square pipe, the cylindrical pipe can be molded while continuously performing the molding process, and the cylindrical pipe or the square pipe can be selectively molded and manufactured as necessary.

Claims (4)

In the rectangular pipe 32 formed of the upper and lower horizontal surfaces 41 and the left and right vertical side surfaces 42, Square pipes each of which is formed by forming an inner corner portion 46 that is bent inward. The inward corner portion 43 that is bent inwardly, Square pipe, characterized in that the inner corner portion 46 is formed to be bent inward between the outer shell portion 44, 45 of both sides. Iron plate strips (2) and iron plate strips (2) that are supplied in line / recess from the iron plate strip (uncoil unit) (2) and continuously supplied while releasing the iron plate strip (30) wound and mounted in a roll shape ( Iron plate strip end welding connecting device portion (3) for welding the rear end and the tip of 30) integrally, while supplying the iron plate strip (30) supplied in advance by a predetermined length continuously while the iron plate strip end welding connection device While the unit 3 is integrally welded to the end of the iron plate strip 30 supplied in the inward direction and the trailing end, the wound iron plate strip 30 is supplied to the cylindrical pipe forming apparatus 5. Rotary type looper device portion (4), a circle for forming a cylindrical metal pipe 31 of the iron plate strip 30 continuously supplied through the rotary type looper device portion (4) Cooling device part 6 for cooling the cylindrical pipe 31 or the square pipe 32 formed through the cylindrical pipe forming device part 5, the cylindrical pipe forming device part 5, and the cooling device part ( 6) a pipe cutting device portion 7 which cuts the cylindrical pipe 31 passing by a predetermined length by a predetermined length, and a cylindrical pipe 31 cut to a predetermined length by the pipe cutting device portion 7 on a forming line. In the pipe forming system apparatus by sequentially installing the discharge device portion (8) for discharging to the outside of the Between the cooling device unit 6 for cooling the cylindrical metal pipe 31 formed by the cylindrical pipe forming device unit 5 and the pipe cutting device unit 7 for cutting the cooled pipe to a predetermined length. In between, each corner of the rectangular pipe 32 which consists of the upper and lower horizontal surfaces 41 and the left and right vertical side surfaces 42 which face the cylindrical metal pipe 31 shape | molded by the cylindrical pipe forming apparatus part 5 inwards. Square pipe forming manufacturing system device characterized in that the installation of the square pipe forming device portion (7) to form a square pipe (40) each formed by the inner corner portion 46 to be bent. The rectangular pipe 40 according to claim 3, wherein each corner of the rectangular pipe 32 is formed between the cooling device portion 6 and the pipe cutting device portion 7 to be bent inward. Square pipe forming device portion 7 to be formed by, The first molding device part 11, the second molding device part 12, the third molding device part 13, the fourth molding device part 14, and the fifth molding device part ( 15), the sixth molding apparatus section 16, the seventh molding apparatus section 17, the eighth molding apparatus section 18, the horizontal vertical support apparatus section 19, and the discharge induction apparatus section 19-1 are installed in this order. The first molding apparatus section 11, the third molding apparatus section 13, the fifth molding apparatus section 15, the seventh molding apparatus section 17, and the discharge induction apparatus section 19-1 are a pair of A molding roller is mounted vertically and vertically, and the 2nd molding apparatus part 12, the 4th molding apparatus part 14, the 6th molding apparatus part 16, and the 8th molding apparatus part 18 are a pair of shaping | molding. The horizontal and horizontal rollers are mounted, and the horizontal and vertical support unit 19 is mounted with a pair of vertical and horizontal rollers, respectively, before and after, Each forming roller 11-1 mounted on the first molding apparatus part 11, the second molding apparatus part 12, the third molding apparatus part 13, and the fourth molding apparatus part 14 vertically or horizontally. ), (12-1), (13-1) and (14-1) are the horizontal molding surfaces 30, 40, 30-1, 40-1 and the vertical molding surface 31, respectively. (41), (31-1) and (41-1) are kept in a state where the curvature (curvature) is gradually increased, and the horizontal forming surface (30) (40) (30-1) (40-1) and the corners at which the ends of the vertical forming surfaces 31, 41, 31-1, and 41-1 are connected to each other are formed in the corner shaped curved protrusions 32, 42, and 32. -1) · 42-1 on both sides of the externally shaped curved protrusions 33, 34, 43, 44, 33-1, 34-1, 43-1, 44-1 ), In a horizontal or vertical state to the sixth molding apparatus part 16, the seventh molding apparatus part 17, the eighth molding apparatus part 18, the horizontal vertical support apparatus part 19, and the discharge induction apparatus part 19-1. The forming rollers 16-1, 17-1, 18-1, 19-2, 19-3 and 19-4 to be mounted are each horizontal forming surfaces 30-2 and 40. -2) and the vertical molding surfaces 31-2 and 41-2 are maintained in the horizontal or vertical state with the largest curvature (curvature), and the horizontal molding surfaces 30-2 and 40-2 and the vertical molding surface. The corners at which the ends of (31-2) (41-2) are connected to each other are formed at both sides of the inner rectangular shaping parts 32-2 and 42-2, and the outer rectangular shaping parts 33-2 and 34-2. (43-2) A square pipe molding manufacturing system apparatus, comprising forming the (44-2).