KR20230121389A - Dual-structure sewage pipe manufacturing apparatus and dual-structure sewage pipe with reduced roughness coefficient and improved strength manufactured thereby - Google Patents

Abstract

The present invention relates to a double structure sewer pipe manufacturing apparatus and a double structure sewer pipe manufactured by the same with reduced roughness coefficient and improved strength, and more particularly, the strength is improved during profile extrusion and the outer circumferential surface of the winding drum for winding the profile is integrally It is formed in a formed cylindrical shape and relates to a double structure sewer pipe manufacturing apparatus having a reduced roughness coefficient and a double structure sewer pipe manufactured thereby.

Description

Dual-structure sewage pipe manufacturing apparatus and dual-structure sewage pipe with reduced roughness coefficient and improved strength manufactured thereby}

The present invention relates to an apparatus for manufacturing a double structure sewer pipe and a double structure sewer pipe manufactured thereby having a reduced roughness coefficient and improved strength, and more particularly, the strength is improved during extrusion of a profile pipe and the outer circumferential surface of a winding drum for winding the profile pipe is It relates to a double structure sewer pipe manufacturing apparatus having a reduced roughness coefficient formed in an integrally formed cylindrical shape and a double structure sewer pipe manufactured thereby.

The double-wall pipe made of synthetic resin has a structure with an inner wall and an outer wall, and is widely used recently due to its strength compared to the single-wall pipe composed of one wall pipe and the ability to efficiently respond to external pressure.

These double-walled pipes are widely used in various industrial sites and agricultural and fishing villages, as well as water and sewage pipes buried underground, pipes for landfilling wires, and underground drainage pipes.

Synthetic resin double-walled pipes can be divided into corrugated double-walled pipes and spiral-shaped double-walled pipes.

The corrugated double wall pipe has a structure in which an outer wall pipe is bonded to an inner wall pipe. The corrugated double wall pipe is manufactured by forming an inner wall pipe in the form of a single wall pipe, forming an outer wall pipe in the form of a corrugate pipe, and bonding the outer wall pipe to the outside of the inner wall pipe while pressing it from the outside. Such a corrugated double-wall pipe requires a large-scale manufacturing apparatus because the inner wall pipe is smooth while the outer wall pipe is formed into a concentric corrugated pipe and bonded.

On the other hand, in the spiral double-walled tube, the part forming the inner wall and the part forming the outer wall are manufactured into a square or circular tube-shaped profile using an extruder, and then the profile is spirally formed on the outer circumferential surface of a cylindrical winding drum composed of a plurality of rollers. It is manufactured by adhering to the tubular profile wound first while winding.

Such a spiral double-walled pipe does not require large-scale manufacturing equipment and has the advantage of being mass-produced, and has recently become more widespread than a corrugated double-walled pipe. In addition, the spiral double-walled pipe has the advantage of being able to more flexibly respond to external pressure because the outer walled pipe is formed in a spiral shape.

Therefore, today's double-walled pipe is being manufactured with preference for the latter spiral double-walled pipe in consideration of the manufacturing method and the simplicity of the manufacturing device. And, in order to increase the roughness coefficient of the inner circumferential surface of the double-walled tube, a square tube-shaped profile is mainly applied rather than a circular tube shape.

However, when the profile is wound on a cylindrical winding drum, unevenness is generated on the inner circumferential surface of the double-walled tube by a plurality of rollers arranged in the circumferential direction, which may lower the roughness coefficient.

Korean Patent Publication No. 10-2010-0050207: Apparatus and method for manufacturing synthetic resin multi-wall pipe

The present invention is to solve the above problems, the winding drum for winding the profile tube is formed in an integral cylindrical shape with a constant curvature, and is formed in a cylindrical shape with a constant curvature on the inner circumferential surface to reduce the roughness coefficient and during extrusion It is intended to provide a manufacturing device capable of manufacturing a double structure sewer pipe with improved strength by improving the density of molten resin.

In addition, the present invention is to provide a double structure sewer pipe in which the strength is improved during extrusion molding and the inner circumferential surface is formed in a cylindrical shape having a constant curvature when wound on a winding drum to reduce the roughness coefficient.

In order to achieve the above object, the dual structure sewer pipe manufacturing apparatus with reduced roughness coefficient and improved strength of the present invention has an extrusion unit for continuously extruding molten synthetic resin, and is mounted at the front end of the extrusion unit and extruded from the extrusion unit A profile tube forming unit for extruding and molding the synthetic resin into a rectangular profile tube, a cooling unit for cooling and solidifying the profile tube formed while passing through the profile tube forming unit, and the cooling unit for cooling the propane tube drawn out from the cooling unit. A pull-out unit including a pair of pull-out belts that are spaced apart vertically and rotated in an endless track in the opposite direction so as to contact the upper and lower portions of the profile tube drawn out from the cooling unit so as to be pulled in a direction away from the unit. And, including a winding drum whose outer circumferential surface is integrally formed into a cylindrical shape and rotated, the profile tube pulled from the drawing portion is wound and joined to the outer circumferential surface in a spiral form to form a double structure tubular shape. It is characterized by having a winding part.

The profile pipe forming part is coupled to the front end of the extruding part, and a resin injection pipe having a resin supply port extending in a longitudinal direction of a screw mounted in the extruding part and having a central side passing through the extrusion part, and one side is coupled to the resin injection pipe. and an outer die member having a receiving space open in a direction away from the resin inlet pipe, and a resin accommodated in the receiving space and having an outer circumferential surface spaced apart from an inner circumferential surface of the outer die member to communicate with the resin supply port together with the external die member. An extrusion passage is formed, and an inner die member having one end facing the resin inlet and dispersing the resin introduced from the resin inlet pipe in a radial direction, wherein the inner die member has an outer circumferential surface and a separation distance between the outer die part and an inner circumferential surface thereof. It is preferable that at least one resin pressing part formed convexly so as to become narrower and then larger and having protrusions extending in a ring shape repeatedly formed is formed.

The outer die member includes a flange portion facing the extruded portion and a reduced outer diameter portion protruding in a direction away from the extruded portion with an outer diameter smaller than that of the flange portion, and the resin injection pipe toward the center of the flange and the reduced outer diameter portion. A first outer die body in which a first through hole is formed so as to be penetrated and penetrated from the first through hole to the outer circumferential side of the outer diameter reduction part to communicate with the resin supply hole; a first outer die body having a first resin dispersion hole formed therein; A second outer die body coupled along the edge of the second outer die body having a second through hole formed therein in the penetration direction of the resin supply port, and coupled to the other end of the second outer die body, the inside of which is in communication with the through hole a fixed outer die including a third outer die body formed in a ring shape and forming the accommodating space together with the second outer die body; One side accommodated in the other side of the second outer die body and constrained to the third outer die body is screwed together so that the other side of the second outer die body enters the second through hole and is spaced apart at regular intervals in the circumferential direction. It is supported by a plurality of positioning bolts and is movably accommodated in a radial direction with respect to the central horizontal extension line of the second through hole so that the separation distance from the inner die member can be adjusted, and the other side is relative to the third outer die body. A variable external die protruding and having a third through-hole formed therein to communicate with the second through-hole, wherein the third through-hole has a tapered portion whose inner diameter decreases as it moves away from the second outer die body. And, it is preferable to include a first square tube forming portion penetrating in a rectangular shape of a certain width at the end of the tapered portion.

The apparatus for manufacturing a double structure sewer pipe having reduced roughness coefficient and improved strength of the present invention is formed in an integrally formed cylindrical shape having the same curvature as the outer circumferential surface of the winding drum for winding the profile pipe, so that the roughness coefficient of the inner circumferential surface of the double structure sewer pipe can be reduced. There is an advantage to being

In addition, the double structure sewage pipe manufacturing apparatus with reduced roughness coefficient and improved strength of the present invention is installed between the winding unit and the cooling water and disposed vertically, and the profile pipe is pulled to the winding unit by pull-out belts rotating in the opposite direction and wound on the winding drum. Therefore, the winding efficiency of the profile tube on the winding drum having a uniform curvature of the outer circumferential surface can be improved.

In addition, the apparatus for manufacturing a sewage pipe having a double structure having a reduced roughness coefficient and improved strength of the present invention can improve strength as the structure of the molten resin becomes dense while the molten resin is pressed and stirred by the resin pressing unit.

In the double structure sewer pipe with reduced roughness coefficient and improved strength, the profile pipe is wound around an integrally formed cylindrical winding drum having the same curvature on the outer circumferential surface, the roughness coefficient is reduced, and the molten resin forming the profile pipe in the profile forming part is made of resin. In the pressurizing part, the pressure and agitation-induced structure becomes dense, so that the strength can be improved.

1 is a view of a double structure sewage pipe manufacturing apparatus with reduced roughness coefficient and improved strength according to an embodiment of the present invention,
Figure 2 is a partial side cross-sectional view of the extruder of the double structure sewage pipe manufacturing apparatus of Figure 1,
Figure 3 is a view of the wire device of the double structure sewage pipe manufacturing apparatus of Figure 1,
Figure 4 is a partial cross-sectional view of a double structure sewer pipe with improved roughness coefficient and strength manufactured by the double structure sewer pipe manufacturing apparatus of FIG.
Figure 5 is a partial cross-sectional view of a double structure sewer pipe with improved roughness coefficient and strength manufactured by a double structure sewer pipe manufacturing apparatus according to another embodiment of the present invention,
Figure 6 is a view of the withdrawer of the double structure sewage pipe manufacturing apparatus according to another embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings, a double structure sewer pipe manufacturing apparatus having reduced roughness coefficient and improved strength of the present invention and a double structure sewer pipe manufactured thereby will be described in more detail.

1 to 3 show a dual structure sewage pipe manufacturing apparatus with reduced roughness coefficient and improved strength according to an embodiment of the present invention, and FIG. 4 shows a sewage pipe with reduced roughness coefficient and improved strength according to an embodiment of the present invention. A double structure sewer pipe 1 manufactured by the manufacturing apparatus 10 is shown.

A dual structure sewage pipe manufacturing apparatus according to an embodiment of the present invention includes an extrusion unit 10 for continuously extruding a molten synthetic resin; A profile tube forming unit 20 installed at the front end of the extrusion unit 10 and extruding a synthetic resin (not shown) extruded from the extrusion unit 10 into a rectangular profile tube 2; A cooling unit 150 for cooling and solidifying the profile tube formed while passing through the profile tube forming unit 20; So that the propane tube 2 drawn out from the cooling unit 150 can be pulled in a direction away from the cooling unit 150, the top and bottom of the profile tube 2 drawn out from the cooling unit 150 are brought into contact with each other vertically and horizontally. A drawing part 160 including a pair of drawing belts 161 that are spaced apart and rotated in an endless orbit in the opposite direction; Including the winding drum 191 formed in a cylindrical shape with an outer circumferential integrally formed and rotated, the profile tube 2 pulled from the drawing part 160 is wound and joined to the outer circumferential surface in a spiral form to form a double structure. It is provided with a winding unit 190 formed in a tubular shape and a cutting unit (not shown) for cutting the double structure sewage pipe 1 continuously extending from the winding unit 190 to a predetermined length.

The extrusion part 10 is connected to the input hopper 11 into which the PE resin is injected and the lower part of the input hopper 11, and extends in a horizontal direction, and a plurality of heaters 13 are installed on the outer circumferential side to , A profile tube forming part 20 extending along the length of the cylinder 12 inside the cylinder 12 and mounting the melted molten resin to the tip of the cylinder 12 by heating the PE resin by a plurality of heaters 13 It is provided with a screw 14 for conveying to and a screw driving unit 15 for rotating the screw. Although not specifically shown, the screw driving unit 15 is rotatably mounted on the outside of the cylinder 12 and is connected to the screw 14 and the driven pulley 16, the screw driving motor, and the driving shaft of the screw driving motor. A drive pulley to be mounted and a drive belt connecting the drive pulley and the driven pulley may be provided.

Referring to FIG. 2, the profile tube forming unit 20 is coupled to the front end of the extrusion unit 10, that is, to the front end of the cylinder 12, and the central side extends through the resin supply port in the longitudinal direction of the screw 14. A resin inlet pipe 21 having 24 formed thereon, an external die member 30 having one side coupled to the resin inlet pipe 21 and having an accommodating space open in a direction away from the resin inlet pipe 21, and an accommodating space It is accommodated in, but the outer circumferential surface is spaced apart from the inner circumferential surface of the outer die member 30 to form a resin extrusion passage P communicating with the resin supply port 24 together with the outer die member 30, and one end is connected to the resin inlet 22 It is provided with an inner die member 80 facing each other and dispersing the resin introduced from the resin injection pipe 21 in a radial direction.

The resin injection pipe 21 has a first flange portion 22 coupled to the front end side of the cylinder, and a pipe body portion protruding in a direction away from the extrusion portion 10 to have a smaller outer diameter than the first flange portion 22 ( 23), and a resin supply port 24 through which molten resin flows into the center of the first flange portion 22 and the pipe body portion 23 is formed.

The tube body portion 23 includes a first body portion 23a having a larger diameter than the first through hole 33 of the first outer die body 32 described later, and an outer diameter corresponding to the first through hole 33. It is provided with a second body portion (23b) having a.

The outer die member 30 includes a fixed outer die 31 fixed to the resin injection pipe 21 and a variable outer die 60 movable in a radial direction from the front end side of the fixed outer die 31 .

The fixed outer die 31 includes a first outer die body 32, a second outer die body 40, and a third outer die body 50.

The first outer die body 32 includes a second flange portion 34 and an outer diameter reduction portion 35 protruding in a direction away from the extrusion portion 10 with an outer diameter smaller than that of the second flange portion 34, The first through-hole 33 through which the resin injection pipe 21 is penetrated and coupled toward the center of the second flange portion 34 and the reduced outer diameter portion 35, and the reduced outer diameter portion 35 in the first through hole 33 ) A plurality of first resin dispersion holes 36 are formed through the outer circumferential side to communicate with the resin supply port 24 and to be spaced apart at regular intervals in the circumferential direction.

And, the first outer die body 32 protrudes in a ring shape on the inner circumferential surface such that the inner diameter of the first through hole 33 at the end side of the outer diameter reduction part 35 in the direction away from the extrusion part 10 is reduced stepwise. and a protruding ring 37 protruding in a direction away from the extrusion part 10 with respect to the outer diameter reduction part 35.

In addition, the first outer die body 32 is formed with a plurality of resin inlet grooves 38 connected to the first resin dispersion hole 36 at the end of the protruding ring 37 facing the variable outer die 60. do.

The second outer die body 40 is formed in a tubular shape with a second through hole 41 penetrating in the direction of penetration of the resin supply hole 24, and one end in the longitudinal direction passes through the edge of the second flange portion 34. bolted together according to

The second outer die body 40 has a first extension portion 43 in which the inner diameter of the second through hole 41 decreases as the distance from the second flange portion 34 increases at one end, and the first extension portion 43 At the end of the second extension portion 44, the inner diameter of the second through hole 41 increases as the distance from the second flange portion 34 increases, and at the end of the second extension portion 44, the second flange portion ( 34), the third extension portion 45 extending in the direction away from the inside diameter is constant, and the inner diameter of the second through portion 41 as the distance from the second flange portion 34 at the end of the third extension portion 45 increases. The decreasing fourth extension portion 46, having a constant inner diameter but having a larger inner diameter than the end of the fourth extension portion 46, and a plurality of positions penetrated by the second through-hole 41 at regular intervals in the circumferential direction It can be divided into a fifth extension part 47 in which the control hole 48 is formed.

The third outer die body 50 is bolted to the other end of the second outer die body 40 and is formed in a ring shape having an interior communicated with the second through hole 41, so that the second outer die body 40 ) together with the receiving space, and has an inner diameter smaller than that of the fifth extension part 47 to constrain the variable external die 60 to be described later.

The variable outer die 60 is accommodated in the other side of the second outer die body 40 and one side constrained to the third outer die body 50 is the second through hole 41 at the other side of the second outer die body 40. ) It is supported by a plurality of positioning bolts 71 screwed into a plurality of positioning holes 48 to enter.

The variable outer die 60 is supported by a plurality of positioning bolts 71, and the plurality of positioning bolts 71 are spaced apart from the inner die member 80 to be described later according to the position at which the second through hole 41 is entered. One side is accommodated in the second outer die body 40 so as to be movable in a radial direction with respect to the central horizontal extension line of the second through hole 41 so as to be able to adjust the distance.

Referring to FIG. 2 , the variable outer die 60 is a circular third planar shape larger than the inner diameter of the third outer die body 40 but smaller than the inner diameter of the fifth extension 47 of the second outer die body 40. The branch portion 65 and the third flange portion 65 protrude in a direction away from the extrusion portion 10 and are located in the third outer die body 40 and have an outer diameter smaller than the inner diameter of the third outer die body 40. A fourth flange portion 66 having a circular shape, and a molded body having a rectangular column shape protruding in a direction away from the extrusion portion 10 with respect to the fourth flange portion 66 and protruding toward the third outer die body 40. A part 67 is provided.

The variable external die 60 is formed with a third through hole 61 passing through the third and fourth flange parts and the molding body part 67 so as to communicate with the second through hole 41 on the inside.

The third through hole 61 has a tapered portion 62 penetrated in a circular shape whose inner diameter decreases as it moves away from the second outer die body 40, and a molding body portion 67 at the end of the taper portion 62 It is divided into a first square tube forming portion 63 penetrating in a rectangular shape with a constant width parallel to the outer circumferential surface of the.

On the other hand, the inner die member 80 has a fixed inner die positioned in the second through-hole 41, one side of which is rotatably supported by the fixed inner die and positioned in the variable outer die 60, and a first square tube shape on the other end side. A variable inner die having a second square tube forming part 120 extending through the inner portion 63 in a rectangular shape and spaced apart from the inner circumferential surface of the first square tube forming part 63 is provided.

The stationary inner die includes first and second inner die bodies 82 and 91.

The first inner die body 82 is formed in a cylindrical shape and has a first receiving groove 85 open in the direction of the variable outer die 60, and an end of the outer diameter reduction portion 35 is inserted into one side to reduce the outer diameter. A first inlet groove 83 open in the direction of the extrusion part 10 is formed to be supported by the part 35 and is located in the second through hole 41, and once the protruding ring 37 is inserted and fixed to the center side A support hole 84 passing through the first inlet groove 83 and the first receiving groove 85 to be in communication with each other is formed.

Also, the first resin pressing portion 87 is formed on the outer circumferential surface of the first inner die body 82 spaced apart from the first extension portion 43 of the second outer die body 40 .

The first inner die body 82 is formed so that the separation distance on the inner circumferential surface of the first extension part 43 of the second outer die body 40 becomes narrower as the outer circumferential surface is farther away from the extrusion part 10. A first resin pressing portion 87 is formed on one side of the outer circumferential surface adjacent to the die body 32 .

The first resin pressing portion 87 convexly protrudes from the outer circumferential surface of the first inner die body 82 to the inner circumferential surface of the second outer die body 40 so that the separation distance becomes narrower and then larger, and the first and second resin pressing parts 87 extend in a ring shape. The second protrusions 88 and 89 are formed repeatedly.

The end of the first protrusion 88 protrudes closer to the inner circumferential surface of the first extension part 43 than the second protrusion 89 and has a greater curvature than the second protrusion 89 .

The first receiving groove 85 is divided into an inner diameter fixing part 86a having a constant inner diameter and an inner diameter expanding part 86b whose inner diameter increases as the distance from the end of the inner diameter fixing part 86a to the extrusion part increases.

The second inner die body 91 has one end inserted into the support groove 90 drawn in a ring shape around the support hole 84 at the end side of the first receiving groove 85 toward the extruded part 10, A second accommodating groove that is accommodated in the first accommodating groove 85, has the other side protruding from the first accommodating groove 85 in the direction of the variable outer die 60, and is open to the inside in the direction of the variable external die 60 ( 92) is formed.

In addition, the second inner die body 91 has a second inlet groove 93 that is drawn in the direction of the variable outer die 60 so as to communicate with the resin supply port 24 at one end of the center side, and the second inlet groove 93 A second resin dispersion hole 94 penetrating from the inner circumferential surface to the outer circumferential side is formed.

Based on the size of the outer diameter of the second inner die body 91, the outer diameter of the second inner die body 91 expands toward the direction of the outer pressing die 60 to the position where the first extension part 43 is formed, and the second resin pressing part 97 is formed. A seventh extension portion 96 facing the inner circumferential surface of the first accommodating groove 85 and a seventh extension portion 96 having an outer diameter that decreases to a position where the second extension portion 44 is formed toward the pressing outer die 60. The extension part 100 and the eighth extension part 101, the outer diameter of which expands toward the direction of the pressurized external die 60, extending to a position adjacent to the extrusion part 10 rather than the end of the third extension part 45; The outer diameter of the eighth extension part 101 decreases to the position where the fourth extension part 46 is formed as the eighth extension part 101 goes from the end to the direction of the pressurized outer die 60, but the separation distance from the inner circumferential surface of the second outer die body 40 increases. It can be divided into 9 extensions (102).

The sixth extension part 96 has a second resin pressing part 97 formed on the side facing the straight extension part 86a of the first receiving groove 85, and facing the first inner diameter expansion part 86b. The side is formed parallel to the first inner diameter expansion portion (86b). The second resin pressing portion 97 protrudes convexly on the inner circumferential surface of the first receiving groove 85 so that the separation distance decreases and then increases, and third and fourth protrusions 98 and 99 extending in a ring shape are repeatedly formed. It is done. The third protrusion 98 has an end protruding from the inner circumferential surface of the first receiving groove 85 farther than the fourth protrusion 99, and is formed to protrude to have a greater curvature than the fourth protrusion 99. The seventh extension portion 100 has a larger outer diameter reduction rate than the inner diameter increase rate of the second extension portion 44 facing toward the pressing outer die 60 . The eighth extension part 101 is formed on the inner circumferential surface of the third extension part 44 facing toward the pressing outer die 60 so that the separation distance becomes narrower.

The variable inner die includes a third inner die body 106 rotatably supported by the second inner die body 91 and a fourth inner die supported by the third inner die body 106 and extending into the first square tube forming portion. A die body 116 and a restraining unit 126 fixing the fourth inner die body 116 on the third inner die body 106 are provided.

The third inner die body 106 includes a first base portion 107 rotatably accommodated in the second receiving groove 92, the outer circumferential face of which is in contact with the inner circumferential surface of the second receiving groove 92, and the first base portion ( 107) is provided with at least one support part 110 protruding in a direction away from the resin supply port 24 with a diameter smaller than that of the first base part 107.

The first base portion 107 has a protruding jaw 108 with an outer diameter extended in a ring shape on the end side of the side away from the extruded portion 10, and the position to be accommodated into the second receiving groove 92 is limited. , A second inlet groove 109 drawn in the direction of the extruded part in a ring shape around the support part 110 is formed.

The third inner die body 106 is formed with a coupling hole 112 penetrating from the first base portion 107 to the support portion 110 .

The fourth inner die body 116 is in contact with the first base portion 107 and extends in a quadrangular shape from the second base portion 117 whose outer diameter decreases in a direction away from the fixed inner die. However, at least one support through-hole 121 is formed extending from the second base portion 117 so that the support portion 110 is inserted therein, and the second spaced apart from the inner circumferential surface of the first square tube forming portion 63. A square tube forming part 120 is provided.

The second base part 117 has an outer diameter corresponding to the inner diameter of the second inlet groove 109 at one end toward the extrusion part 10, and an insertion part 118 inserted into the second inlet groove 109 is formed. .

The restraining unit 126 is inserted into the support through-hole 121 and coupled to the support 110 with a bolt 129, and the side protruding from the second square tube forming part 120 has a larger outer diameter than the support through-hole 121. and a restraining bush 127 for fixing the fourth inner die body 116 to the third inner die body 106.

The molten resin introduced into the profile pipe forming unit 20 having the above structure flows into the resin supply port 24 and passes through the first resin dispersion hole 36 and the second resin dispersion hole 94, It is dispersed and moved between the outer circumferential surface of the first inner die body 82 and the inner circumferential surface of the second outer die body 91 and the inner circumferential surface between the outer circumferential surface of the second inner die body 91 and the first inner die body 82, then , mixed again between the outer circumferential surface of the second inner die body 91 and the inner circumferential surface of the second inner die body 91 facing each other, between the inner circumferential surface of the variable outer die 60 and the outer circumferential surface of the fourth inner die body 116 It is moved and extruded toward the cooling unit in a square shape.

Then, the molten resin moved between the outer circumferential surface of the first inner die body 82 and the inner circumferential surface of the second outer die body 91 and between the outer circumferential surface of the second inner die body 91 and the first inner die body 82 Through the first and second resin pressing parts 87 and 97, the resin flows in a zigzag direction away from and adjacent to the extension of the resin supply port 24, and in this process, the flow speed is applied unevenly, and instantaneous pressure is generated As a result, the structure of the melt becomes dense and the strength can be improved.

The cooling unit 150 includes a vacuum cooler 151 for primary cooling and solidification of the profile tube 2 extruded from the profile tube forming unit 20 and the profile tube 2 drawn out from the vacuum cooler 151. A cooling water supply cooler 156 for secondary cooling and solidification by spraying cooling water is provided.

The vacuum cooler 151 is for strictly controlling the outer shape of the profile tubes 2 by applying a vacuum so that each profile tube 2 adheres to the inner wall of the sizing mold having a rectangular cross section mounted therein.

The cooling water supply cooler 156 may have a plurality of injection nozzles therein to cool the profile tube 2, or may have a water bottle formed along the longitudinal direction for containing the cooling water. That is, the profile tube 2 may be cooled while being transported by a plurality of injection nozzles or may be cooled by passing through a water container containing cooling water.

The pull-out unit 160 powers the base frame 165 and a pair of pull-out belts 161 and 164 that are vertically disposed on the top of the base frame 165 to press and transfer the profile tube 2 that is extruded and transported. It may be provided with a pull-out power unit 167 for transmitting and a lifting means (not shown) for adjusting the vertical separation distance of the pair of pull-out belts 161.

The take-out power unit 167 includes a take-out driving motor 168, a take-out drive pulley (not shown) mounted on the drive shaft of the take-out drive motor, and a take-out belt 161 positioned below the pair of take-out belts 161. A pull-out driven pulley (not shown) mounted on the shaft 163 of the sprocket 162 supporting the pull-out drive belt 169 connecting the pull-out drive pulley and the pull-out driven pulley, and the shaft 163 of the sprocket 162 ) and the pair of take-out belts 161 and 164, which are mounted on the shaft 166 of the sprocket 165 supporting the take-out belt 164 located on the upper side and mesh with the first gear located on the lower side. A second gear may be provided.

The winding unit 190 includes a body unit 191, a winding drum 192 whose longitudinal end is rotatably supported by the body unit 191 horizontally in the longitudinal direction, and a drum for rotating the winding drum 192. Bonding, which is mounted on the driving part 195 and the upper part of the body part 191, and supplies the bonding resin between the profile tubes 2 that are in contact with each other while being wound around the winding drum 192 rotated through the nozzle 202 in a pressurized state. Supplied between the resin extrusion part 201, the vertical roller 206 for guiding the profile tube 2 in contact with the side of the profile tube 2 wound on the winding drum 192, and the profile tube 2 in contact with each other A heating unit (not shown) for heating the bonding resin, a pressure roller 208 for pressurizing the bonding resin supplied between the profile tubes 2 contacting each other may be provided.

As shown in FIG. 3, the winding drum 192 is integrally formed with an outer circumferential surface and is formed in a cylindrical shape having a constant curvature in the circumferential direction, and as shown in FIG. 4, a profile tube is spirally wound. The double structure sewer pipe may have a low roughness coefficient of the inner circumferential surface.

The drum driving unit 195 is not limited to the drawings shown, but a drum driving motor 196 mounted on one side of the body 191 and a driving gear 198 mounted on the drive shaft 197 of the drum driving motor 196. ), and a driven gear 199 that rotates concentrically with the winding drum 192 at one end of the winding drum 192, and a drum rotating belt 201 connecting the drive gear 198 and the driven gear 199 can be provided

In the dual structure sewage pipe manufacturing apparatus with reduced roughness coefficient and improved strength according to an embodiment of the present invention, the outer circumferential surface of the winding drum 192 winding the profile pipe 2 is formed in an integrally formed cylindrical shape having the same curvature. There is an advantage that the roughness coefficient of the inner circumferential surface of the double structure sewer pipe 1 can be reduced.

In addition, the double structure sewage pipe manufacturing apparatus with reduced roughness coefficient and improved strength according to an embodiment of the present invention is installed between the winding unit 190 and the cooling unit 150 and disposed vertically and rotated in the opposite direction. 161 and 164, the profile tube 2 is pulled by the winding unit 160 and wound around the winding drum 192, so that the winding efficiency of the profile tube can be improved on a winding drum having a uniform outer circumference.

In addition, in the dual structure sewer pipe manufacturing apparatus with reduced roughness coefficient and improved strength according to an embodiment of the present invention, the molten resin is pressed and stirred by the first and second resin pressing units, and the structure of the molten resin becomes dense and the strength is improved. It can be.

In the double structure sewer pipe (1) with reduced roughness coefficient and improved strength according to an embodiment of the present invention, the profile pipe (2) is wound around a cylindrical winding drum (192) formed integrally with the outer circumferential surface having the same curvature, so that the roughness coefficient is reduced. and the molten resin forming the profile pipe in the profile forming part is pressed and stirred in the resin pressing part, and the strength can be improved because the structure is dense.

On the other hand, Figure 5 shows a double structure sewage pipe (1 ') according to another embodiment of the present invention. The double structure sewer pipe (1') according to another embodiment of the present invention is a double structure sewer pipe according to an embodiment of the present invention, except that the cross-shaped reinforcing ribs (3) are formed on the inner circumference of the profile pipe (2'). The structure of (1) is the same.

In addition, the double structure sewer pipe manufacturing apparatus according to another embodiment of the present invention has the same structure as the double structure sewage pipe manufacturing apparatus according to an embodiment of the present invention except for the variable inner die.

Although not shown, the variable inner die according to another embodiment of the present invention has a plurality of support parts arranged in a square shape, and is drawn into the second square tube forming part 120 in a cross shape in the direction of the extrusion part 10 A rib forming groove (not shown) for forming the reinforcing rib 3 is formed in the profile pipe 2', and a plurality of support through-holes are formed to correspond to a plurality of supports arranged in a square shape, and the outer diameter of the support It has the same structure as one embodiment of the present invention except that it is formed to have a corresponding inner diameter.

More specifically, the third inner die body of the variable inner die according to another embodiment of the present invention includes the first base part 107, and the first base part 107 is larger than the first base part 107. It has a small diameter and protrudes in a direction away from the resin supply port 24 and has a plurality of supports arranged in a square shape. The support part according to another embodiment of the present invention has the same structure as the support part 110 according to one embodiment of the present invention, but is formed with a smaller diameter.

The fourth inner die body of the variable inner die according to another embodiment of the present invention extends from the second base part 117 and the second base part 117 in a quadrangular shape, and the second base so that each support part is inserted therein. It has a second square tube forming part in which a plurality of support through-holes arranged in a square form and extending from the portion 117 are formed, and a cross-shaped rib forming groove (not shown) is formed between the plurality of support through-holes. The support through-hole according to another embodiment of the present invention has the same structure as the support through-hole 121 according to an embodiment of the present invention, but is formed with a smaller diameter.

Further, the restraining units of the variable inner die according to another embodiment of the present invention are provided corresponding to the number of support through-holes 121, inserted into the support through-holes according to another embodiment of the present invention, and coupled with the support by bolts, According to another embodiment of the present invention, a restraining bush for fixing the fourth inner die body to the third inner die body having a side protruding from the second square tube forming part has a larger outer diameter than the support through hole.

According to another embodiment of the present invention, the double structure sewer pipe 1' having a reduced roughness coefficient and improved strength has a cross-shaped reinforcing rib 3 formed inside the profile pipe 2', so that the strength can be improved.

On the other hand, Figure 6 shows the withdrawal portion of the double structure sewage pipe manufacturing apparatus according to another embodiment of the present invention.

The drawing part according to another embodiment of the present invention is disposed on the front and rear sides of the pair of drawing belts 161 and 164 and further includes a shape maintaining guide part 170 for maintaining the rectangular shape of the profile pipe 2.

The shape maintaining guide unit 170 is disposed vertically and includes a plurality of shape maintaining rollers 171 and 174 rotatable by the feeding force of the profile pipe 2 transported by the rotational force of the pair of pull-out belts 161 and 164.

The plurality of shape maintaining rollers 171 and 174 are introduced to a depth of half the width of the rectangular profile tube 2 with a width corresponding to the width of the rectangular profile tube 2 at the center of the outer circumferential width and extend along the circumferential direction Shape retaining grooves 172 and 175 formed in a ring shape are formed, respectively.

The shape in which the shape retaining grooves 172 and 175 of the plurality of shape retaining rollers 171 and 174 are vertically matched corresponds to the square shape of the profile tube 2 extruded from the profile tube forming unit 20, and the cooling unit 150 ) Pressurize the profile tube 2 drawn out or transferred from the take-out unit 160 to the take-up unit 190 to maintain the shape of the profile tube 2 extruded from the profile tube forming unit 20.

Although the present invention has been described with reference to the embodiments shown in the drawings, this is only exemplary, and those skilled in the art will understand that various modifications and equivalent embodiments are possible therefrom. Therefore, the true scope of protection of the present invention should be defined only by the appended claims.

1: Double structure sewer pipe with reduced roughness coefficient and improved strength
2: profile pipe 10: extrusion part
20: profile pipe forming part 21: resin injection pipe
30: external die member 31: fixed external die
60: variable outer die 80: inner die member
81: fixed inner die 105: variable inner die
150: extrusion part 160: withdrawal part
190: winding unit

Claims (7)

An extrusion unit for continuously extruding the molten synthetic resin;
A profile tube molding unit mounted at the front end of the extrusion unit and extruding the synthetic resin extruded from the extrusion unit into a rectangular profile tube;
A cooling unit for cooling and solidifying the profile tube formed while passing through the profile tube forming unit;
So that the propane tube drawn out from the cooling unit can be pulled in a direction away from the cooling unit, it is spaced apart vertically so as to contact the upper and lower parts of the profile tube drawn out from the cooling unit, and moves in an endless orbit in the opposite direction. A drawing unit including a pair of rotating drawing belts;
The outer circumferential surface is integrally formed and formed in a cylindrical shape having a constant curvature in the circumferential direction, including a rotating winding drum, and the profile tube pulled from the drawing part is wound and joined to the outer circumferential surface in a spiral form in close contact with each other to form a double structure. Dual structure sewage pipe manufacturing apparatus characterized in that it is provided with a winding portion formed in a tubular shape of. The method of claim 1, wherein the profile tube forming part
A resin injection pipe coupled to the front end of the extrusion part and having a resin supply port extending in the longitudinal direction of the screw installed in the extrusion part and having a central side thereof;
An external die member having one side coupled to the resin inlet pipe and having an accommodation space open in a direction away from the resin inlet pipe;
Accommodated in the accommodation space, the outer circumferential surface is spaced apart from the inner circumferential surface of the outer die member to form a resin extrusion flow path communicating with the resin supply port together with the outer die member, and one end faces the resin inlet port to flow in from the resin inlet pipe. An inner die member for dispersing the resin in a radial direction,
The inner die member is
A dual structure sewage pipe manufacturing apparatus, characterized in that at least one resin pressing part is formed on the outer circumferential surface so that the outer die part is convexly protruded so that the separation distance becomes narrower and larger on the inner circumferential surface and the protrusion extending in a ring shape is repeatedly formed. The method of claim 2, wherein the outer die member
A flange portion facing the extruded portion and a reduced outer diameter portion protruding in a direction away from the extruded portion with an outer diameter smaller than that of the flange portion, wherein the resin injection pipe is coupled through the flange to the center of the reduced outer diameter portion. A first outer die body in which a through hole is formed and a first resin dispersing hole is formed which penetrates from the first through hole to the outer circumferential side of the outer diameter reduction part and communicates with the resin supply hole, and one end is coupled along the edge of the flange part. A second outer die body having a second through hole formed therein in the penetrating direction of the resin supply hole, coupled to the other end of the second outer die body, and formed in a ring shape with an inside communicating with the through hole a fixed outer die including a third outer die body forming the accommodating space together with the second outer die body;
One side accommodated in the other side of the second outer die body and constrained to the third outer die body is screwed together so that the other side of the second outer die body enters the second through hole and is spaced apart at regular intervals in the circumferential direction. It is supported by a plurality of positioning bolts and is movably accommodated in a radial direction with respect to the central horizontal extension line of the second through hole so that the separation distance from the inner die member can be adjusted, and the other side is relative to the third outer die body. A variable external die protruding and having a third through-hole formed therein so as to communicate with the second through-hole;
The third through-hole includes a tapered portion whose inner diameter decreases as it moves away from the second outer die body, and a first square tube forming portion penetrating in a rectangular shape of a predetermined width at an end of the taper portion. Sewer pipe manufacturing equipment. 4. The method of claim 3, wherein the inner die member
a fixed inner die positioned within the second through hole;
A second square tube having one side rotatably supported by the fixed inner die, positioned within the variable outer die, and penetrating the other end into the first square tube-forming part in a rectangular shape and spaced apart from the inner circumferential surface of the first square tube-forming part. A dual structure sewage pipe manufacturing apparatus comprising a variable inner die having a forming part. The method of claim 4, wherein the fixed inner die
An end of the outer diameter reduction part is inserted into one side and a first inlet groove open toward the extrusion part is formed to be supported by the outer diameter reduction part, and a first inlet groove opened in the direction of the variable outer die is positioned in the second through-hole. A support hole passing through the inlet groove and the first receiving groove in communication with the receiving groove is formed at one end of the center side so that the receiving groove and the protruding ring protruding around the first through-hole at the end of the outer diameter reduction portion are inserted and fixed. 2;
One end is inserted into the support groove drawn in a ring shape from the circumference of the support hole at the end side of the first accommodating groove toward the extrusion part and accommodated in the first accommodating groove, and one side is on the inner circumferential surface of the first accommodating groove. It has a spaced outer diameter, but another resin pressing part is formed on the outer circumferential surface, the other side protrudes in the direction of the variable outer die with respect to the first receiving groove, and a second receiving groove is formed on the inside to open in the direction of the variable external die. , A second inner die body having a second inlet groove that is drawn in the direction of the variable outer die so as to communicate with the resin supply port at one end of the center side, and a second resin dispersion hole that penetrates from the inner circumferential surface of the second inlet groove to the outer circumferential side. ;
The variable inner die
A third portion comprising a first base portion rotatably accommodated in the second receiving groove and at least one support portion protruding in a direction away from the resin supply port with a diameter smaller than that of the first base portion in the first base portion. an inner die body;
A second base portion that is in contact with the first base portion and whose outer diameter decreases in a direction away from the fixed inner die, and extends in a rectangular shape from the second base portion and penetrates from the second base portion so that the support portion is inserted therein. a fourth inner die body including a second square tube forming part having at least one support through hole formed therein and spaced apart from an inner circumferential surface of the first square tube forming part;
and a restraining unit inserted into the support through-hole and coupled to the support to fix the fourth inner die body on the third inner die body. According to claim 5,
The molten resin flowing into the resin supply port is disposed between the outer circumferential surface of the first inner die body and the inner circumferential surface of the second outer die body and the outer circumferential surface of the second inner die body through the first resin dispersion hole and the second resin dispersion hole. It is dispersed and moved to the inner circumferential surface between the first inner die body and then mixed again between the outer circumferential surface of the second inner die body and the inner circumferential surface of the second inner die body facing each other, and the inner circumferential surface of the variable outer die and the A dual structure sewage pipe manufacturing apparatus, characterized in that it is moved between the outer circumferential surfaces of the fourth inner die body and extruded to the outside in a square shape. A double structure sewer pipe with reduced roughness coefficient and improved strength, characterized in that produced by the double structure sewer pipe manufacturing apparatus of any one of claims 1 to 6.

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