KR102296094B1 - Manufacturing apparatus of synthetic resin pipe - Google Patents

Abstract

The present invention is an extruder for extruding a synthetic resin tube through a hollow molding part so that the hollow part is formed in a spiral shape in the longitudinal direction while slowly rotating the resin supplied from the raw material supply device; an air bracket formed in a cylindrical shape equal to the inner diameter of the synthetic resin pipe in front of the air supply pipe formed inside the extruder to support the inner surface of the synthetic resin pipe that is extruded from the extruder and introduced into the cooler of the die; an air discharge pipe in which a plurality of air holes are formed in order to cool the inner surface of the synthetic resin pipe in front of the air bracket; An air discharge plate in which a plurality of air discharge holes are perforated in the disk so that the air discharged through the air holes cools the inner surface of the synthetic resin tube to the outside of the air discharge pipe in front of the air discharge pipe and discharges the hot air to the outside; an air supply pipe in which a plurality of air holes are perforated so that air is also discharged to the rear of the air bracket so as to cool the hollow part of the synthetic resin pipe in which the hollow part is formed while being extruded from the extruder; and a rotation driving means for transmitting rotational power to the air supply pipe; by implementing the rotation driving means to rotate the air supply pipe and the air bracket, air discharge pipe, and air discharge plate integrally formed therewith, durability It relates to a pipe manufacturing apparatus with improved durability that enables manufacturing of this excellent and high-quality synthetic resin pipe.

Description

Pipe manufacturing equipment with improved durability {MANUFACTURING APPARATUS OF SYNTHETIC RESIN PIPE}

The present invention relates to a pipe manufacturing apparatus in which a hollow part is formed in a spiral shape, and in particular, by rotating an air bracket that supports the inner surface of the synthetic resin tube and allows cooling air to be sprayed toward the inner surface of the synthetic resin tube. It is a technology related to a pipe manufacturing apparatus with improved durability that enables uniform cooling treatment to manufacture high-quality synthetic resin pipes.

In general, synthetic resin pipes are mainly used for piping materials buried in the ground in consideration of factors such as economic feasibility and workability.

The synthetic resin pipe extrudes and cools a rectangular profile having a hollow inside, and then supplies the molten resin between the profiles while spirally supplying it to the winder, so that the profile is continuously connected integrally to form a smooth synthetic resin pipe. made it possible

However, these conventional double-walled synthetic resin pipes are weak to earth pressure or external pressure, and depending on the external temperature change, the bonding force with the resin connecting the profiles is weakened and separation occurs frequently, which lowers the reliability of the product. .

In addition, in order to prevent these drawbacks, it has been proposed to integrally extrude reinforcing bars of various shapes inside the rectangular profile, and the strength is slightly improved. did not see

In recent years, a synthetic resin pipe with a reinforcing wall erected with a hollow inside at regular intervals has been proposed, and since this conventional synthetic resin pipe is molded while extruding, it was possible when using a raw material with good cooling such as PVC, but such as PE. In the case of poor cooling, the forming speed is very slow, resulting in reduced productivity, and the hollow is not formed properly during the production process and sags to the inner diameter.

In order to solve this problem, a non-bonding spiral synthetic resin pipe is proposed, which is extruded and molded in a spiral shape while rotating a mold, which is a molding device that is extruded while extruding a synthetic resin pipe having a hollow inside, in one direction.

As a technology for a manufacturing device for such a spiral synthetic resin pipe,

Republic of Korea Patent Registration No. 10-0496550 (Registered on June 13, 2005, hereinafter referred to as 'Document 1') "Method for manufacturing an integral pipe with a hollow part and an apparatus for manufacturing the same" is proposed,

Document 1 describes a process of crushing a recycled product made of PE or PP to a predetermined size, a process of mixing the crushed PE or PP with non-recycled PE or PP, a process of melting the mixed PE or PP, the molten A process of extruding PE or PP to have a plurality of hollow parts in the longitudinal direction of the pipe in the shape and thickness of the pipe, cooling the molded pipe to 80-100° C., and twisting the cooled pipe and forming the plurality of hollow parts in a spiral form and cooling and hardening, and by forming the pipe integrally, unlike the conventional method of manufacturing a pipe, it is integrally formed without providing any junctions, so that the inside of the pipe The present invention relates to a method for manufacturing an integrated pipe provided with a hollow part that can increase the tensile strength of a pipe by flowing water pressure as well as shorten the manufacturing time of the pipe, thereby reducing the manufacturing cost, and a manufacturing apparatus thereof.

As another technology, Republic of Korea Patent Registration No. 10-1011877 (registered on Jan. 24, 2011, hereinafter referred to as 'Document 2') 『A device for manufacturing a synthetic resin multilayer pipe using air circulation cooling』 is proposed,

Document 2 is provided with an exhaust fan in which an exhaust pipe and a connecting pipe are integrally formed in order to facilitate suction and discharge of heat converted from cold air to the outside on one rear side of a known synthetic resin multilayer pipe manufacturing apparatus, the connecting pipe and the 'T The 'shaped heat exhaust pipe is configured with a plurality of heat suction holes at one end to facilitate the inhalation of heat, and the heat exhaust pipe penetrates the inside of the die and the inside diameter sizing so that the heat suction hole can be located inside the inner diameter sizing. A cold air injection pipe for moving the forcedly injected cold air of 3 to 15° C. to the inner wall surface of the multi-layer pipe where it starts to be extruded is inserted into the inside of the hot air discharge pipe, so that it is easy to slide in a certain section by external pressure On the other hand, a plurality of cold air exhaust holes are formed on the side of the cold air injection tube so that the injected cold air can reach the inner wall surface of the multi-layer tube, so that the cold air is injected and discharged at the same time so that the multi-layer tube is cooled according to the air circulation. , an air circulation type that minimizes the occurrence of eccentricity of the multi-layer pipe in the multi-layer pipe made of synthetic resin and allows the inner wall surface of the multi-layer pipe to be cooled quickly, thereby improving the strength of the synthetic resin multi-layer pipe and increasing the productivity. It is a technology related to the manufacturing apparatus of a synthetic resin multi-layer pipe using cooling.

In the techniques of Documents 1 and 2, the unbonded spiral synthetic resin pipe is rotated to become spiral in one direction while extruding PE. At this time, when air is supplied to the inside of the extruded synthetic resin pipe to cool it, axial sagging occurs or the inner surface is not maintained uniformly, and accurate strength is not provided because the thickness of the pipe is not constant, and This caused a decrease in reliability.

As a technique to solve these problems,

Republic of Korea Patent Registration No. 10-1435861 (Registered on August 25, 2014, hereinafter referred to as 'Document 3') 『A device for manufacturing a spiral type synthetic resin pipe』 is presented,

Document 3 describes an extruder that extrudes a synthetic resin tube through a hollow molding part so that a hollow part is formed in a spiral shape in the longitudinal direction while slowly rotating the resin supplied from the raw material supply device, and a synthetic resin pipe that is extruded from the extruder and introduced into the cooler of the die. In front of the air supply pipe formed inside the extruder to support the inner surface, an air fitting is formed in a cylindrical shape to be the same as the inner diameter of the synthetic resin pipe, and a plurality of air holes are formed in front of the air fitting to cool the inner surface of the synthetic resin pipe. In front of the discharge pipe and the air discharge pipe, the air discharged through the air hole cools the inner surface of the synthetic resin pipe and the hot air generated can be discharged to the outside; By including an air supply pipe in which a plurality of air holes are perforated so that air is also discharged to the rear of the air bracket to cool the hollow part of the synthetic resin pipe in which the hollow part is formed while being extruded from the extruder, the extruder rotates slowly in a single process in the longitudinal direction When the extruded synthetic resin pipe to form a spiral hollow part with the dies flows into the cooler of the die, air is blown out while supporting the inner surface of the synthetic resin tube with an air bracket to cool the synthetic resin tube without deformation, and the inner surface is uniformly thick. It is a technology related to a manufacturing apparatus of a spiral-type synthetic resin pipe for molding.

Document 1. Korean Patent Registration No. 10-0496550 (Registered on Jun. 13, 2005) Document 2. Korean Patent Registration No. 10-1011877 (Registered on Jan. 24, 2011) Document 3. Korean Patent Registration No. 10-1435861 (Registered on August 25, 2014)

The present invention is a synthetic resin that is extruded and rotated by discharging air through the air outlet formed in front of the air fitting while preventing the sagging phenomenon while supporting the inner surface of the synthetic resin pipe, and maintaining the thickness of the synthetic resin pipe at a constant level. To provide a pipe manufacturing device with improved durability that allows the pipe to be cooled and molded, and by rotating the air bracket to enable uniform cooling treatment through cooling air, so that high-quality synthetic resin pipe with excellent durability can be manufactured. There is a purpose.

Furthermore, the present invention has improved durability by forming a plurality of recesses along the air outlet plate of the air bracket to prevent air from stagnating in the clogged space between the air outlet plate and the inner surface of the synthetic resin pipe and to be immediately exhausted to the outside. An object of the present invention is to provide a pipe manufacturing apparatus.

In addition, the present invention provides a cooling water storage tank between two tanks for exchanging liquid nitrogen refrigerant, and cooling the cooling water to a certain temperature through heat exchange between the refrigerant and the cooling water exchanged in the storage tank, and then supplying it to the cooler of the die It is an object of the present invention to provide an apparatus for manufacturing a pipe with improved durability that enables recovery and supply of cooling air generated during heat exchange to an air bracket.

In addition, the present invention can improve the quality through internal air cooling, low temperature and customized cooling temperature control, etc., which not only improves the production speed, but also increases the length of the facility itself due to the long cooling zone for cooling during pipe manufacturing. An object of the present invention is to provide an apparatus for manufacturing a pipe with improved durability that can significantly reduce the length of the facility itself by solving the unavoidable existing problem, and thus can implement a movable structure that can be mounted on various moving means and can be moved.

In order to solve the above problems, the pipe manufacturing apparatus with improved durability according to the present invention,

an extruder for extruding the synthetic resin tube through the hollow molding part so that the hollow part is formed in a spiral shape in the longitudinal direction while slowly rotating the resin supplied from the raw material supply device;

an air bracket formed in a cylindrical shape equal to the inner diameter of the synthetic resin pipe in front of the air supply pipe formed inside the extruder to support the inner surface of the synthetic resin pipe that is extruded from the extruder and introduced into the cooler of the die;

an air discharge pipe in which a plurality of air holes are formed in order to cool the inner surface of the synthetic resin pipe in front of the air bracket;

An air discharge plate in which a plurality of air discharge holes are perforated in the disk so that the air discharged through the air holes cools the inner surface of the synthetic resin tube to the outside of the air discharge pipe in front of the air discharge pipe and discharges the hot air to the outside;

an air supply pipe in which a plurality of air holes are perforated so that air is also discharged to the rear of the air bracket so as to cool the hollow part of the synthetic resin pipe in which the hollow part is formed while being extruded from the extruder; and

a rotation driving means for transmitting rotational power to the air supply pipe;

It is characterized in that the air supply pipe and the air bracket formed integrally therewith, the air discharge pipe, and the air discharge plate are rotated together by the rotation driving means.

An apparatus for manufacturing a pipe with improved durability according to the present invention,

It has the greatest effect of being able to manufacture a high-quality synthetic resin pipe with excellent durability, circulating cooling water and controlling temperature, and allowing the cooling air generated during heat exchange to be used for cooling treatment of the synthetic resin pipe.

1 is a block diagram showing an apparatus for manufacturing a pipe with improved durability according to the present invention;
2 is a configuration diagram showing a state in which the manufacturing apparatus of the present invention is mounted on a transport means that is moved along the rail;
3 is a configuration diagram showing a state in which the manufacturing apparatus of the present invention is mounted on a trailer;
4 is a configuration diagram showing a state in which the manufacturing apparatus of the present invention is mounted on a ship;
5 is a side configuration view for showing the formation of a hollow part of the synthetic resin tube;
Figure 6 is a side configuration view for showing the formation of the concave-convex surface of the synthetic resin pipe,
7 is a three-dimensional configuration diagram for showing a recess in the manufacturing apparatus of the present invention;
8 is a partial cross-sectional configuration view for showing the recess and rotation driving means in the manufacturing apparatus of the present invention;
9 is a partial cross-sectional configuration view for showing the protrusion;
10 is a block diagram showing a rotation driving means and a cooling water circulation unit;
11 is a configuration diagram of an operating state for showing the movement process of the refrigerant;
12 is a configuration diagram of an operating state for showing a heat exchange process of another embodiment;
13 is a configuration diagram of an operating state for showing a heat exchange process according to another embodiment.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Prior to this, the terms or words used in the present specification and claims should not be construed as being limited to their ordinary or dictionary meanings, and the inventor should properly understand the concept of the term in order to best describe his invention. Based on the principle that it can be defined, it should be interpreted as meaning and concept consistent with the technical idea of the present invention. Therefore, the configuration shown in the embodiments and drawings described in the present specification is only the most preferred embodiment of the present invention and does not represent all the technical spirit of the present invention, so various equivalents that can replace them at the time of the present application It should be understood that there may be water and variations.

As shown in Figure 1, the pipe manufacturing apparatus with improved durability according to the present invention,

The raw material supply device 10 for molding the synthetic resin pipe 50 is formed, and heat is applied to the raw material supplied to the extruder 20 through the raw material supply device 10 through the extruder 20 extended forward. It is configured to be extruded by molding the synthetic resin pipe (50).

At this time, the front of the extruder 20 is configured with a hollow part 51 inside the hollow forming part 21 to form a spiral shape in the longitudinal direction. And in order to cool the hollow part 51 of the synthetic resin pipe 50 extruded forward of the extruder 20, an air hole 44 is drilled in the rear of the air bracket 41 at the point where the extruder 20 ends. do.

In addition, in order to cool the inner surface 52 of the synthetic resin pipe 50, which is molded and extruded in the extruder 20, the hollow part 51 is extended to the inner center of the extruder 20 to the inner center of the die 30. A plurality of air holes 42' are also perforated in front of the air bracket 41 to be inserted.

And the synthetic resin pipe 50 extruded from the extruder 20 is configured to be guided to the cooler 30a of the die 30, and an air supply pipe 40 in the inner central part of the synthetic resin pipe 50 guided by the cooler 30a ) is configured to extend to be inserted into the inside of the extruder (20). At this time, the extruder 20 and the die 30 are configured to rotate slowly by receiving the power of the motor M while being heated by the heater, so that the synthetic resin pipe 50 extruded from the extruder 20 has a spiral type in the longitudinal direction. of the hollow part 51 is formed.

In addition, a cylindrical air fitting 41 is formed in front of the air supply pipe 40 to have the same inner diameter as the synthetic resin pipe 50 so that the synthetic resin pipe does not sag while in close contact with the inner surface 52 of the synthetic resin pipe 50 . constructed to support

In addition, an air discharge pipe 42 is formed in front of the cylindrical air bracket 41 so that the air supplied through the air supply pipe 40 can be discharged, and a plurality of air holes 42' are perforated on the outer circumferential surface. .

And in front of the air discharge pipe 42, a plurality of air so that the air discharged through the air hole 42' can discharge the hot air generated while cooling the inner surface 52 of the synthetic resin pipe 50 to the outside. The air discharge plate 43 in which the discharge hole 43' is perforated is configured as a disk.

Although the raw material supply device, the extruder, and the dies described for the present invention are separated or partially illustrated throughout the drawings, the synthetic resin pipe is actually formed while connected to each other.

On the other hand, in another embodiment of the present invention, as shown in FIG. 9, the synthetic resin pipe 50' extruded through the extruder 20 is guided to the cooler 30a of the die 30, and the synthetic resin pipe 50' A plurality of circular projections 45 are formed on the outer circumferential surface of the cylindrical air bracket 41' for supporting the inner surface 52' in a cylindrical shape.

Therefore, on the inner surface 52' of the synthetic resin pipe 50', the concave portion 53 and the convex portion 54 are formed by the circular protrusions 45 formed on the outer circumferential surface of the air fitting 41' while the air fitting 41' rotates. ) is formed to reinforce the strength of the synthetic resin pipe 50 and to quickly induce the flow rate.

When an embodiment of the pipe manufacturing apparatus in which the hollow part of the present invention configured as described above is formed in a spiral shape will be described in detail with reference to FIG. 1 , when the raw material is supplied from the raw material supply device 10 , the raw material is passed through the extruder 20 is supplied

At this time, the extruder 20 is heated and at the same time it receives the power of the motor M and rotates slowly to extrude the synthetic resin pipes 50 and 50a through the expansion pipe 22 of the extruder 20 .

As shown in [A] of Figure 5, the synthetic resin pipe 50a is a spiral hollow part in the longitudinal direction while slowly rotating through the hollow molding part 21 formed in front of the expansion pipe 22 of the extruder 20 ( 51) is formed and extruded. In addition, the air supplied to the air supply pipe 40 formed in the inner central portion of the extruder 20 is discharged through the air hole 44 of the air supply pipe 40 formed inside the extruder 20, while the synthetic resin pipe 50. of the hollow part 51 is cooled.

At this time, as in [B] of FIG. 5, the synthetic resin tube 50a may be extruded to further form an inner body 52a of a shape surrounding the inner surface 52 to be implemented as a pressure tube.

The configuration of extruding the synthetic resin pipe 50 so that the spiral hollow part 51 is formed in the longitudinal direction in the extruder 20 as described above is a known configuration, and the specific configuration is omitted.

And the synthetic resin pipe 50 extruded from the extruder 20 is coupled to the front of the extruder 20 and receives power like the extruder 20 and is guided into the cooler 30a of the die 30 which rotates slowly. The inner surface 52 of the synthetic resin tube is cooled so that the outer and inner surfaces are beautifully molded and the synthetic resin tube 50 heated while being extruded does not sag and is molded to a uniform thickness.

That is, in the inside of the synthetic resin tube 50 guided by the cooler 30a of the die 30, the air bracket 41 formed in a cylindrical shape is formed in front of the air supply tube 40 inserted into the inside of the extruder 20. The synthetic resin tube While supporting the inner surface 52 of the 50 so as not to sag, the synthetic resin pipe 50 ) to cool the inner surface 52 .

At this time, the air discharged through the air hole 42' of the air discharge pipe 42 is not dispersed to the outside but is intensively discharged to the inner surface 52 of the synthetic resin pipe 50, so that the cooling effect can be enhanced. In front of the tube 42, an air discharge plate 43 is formed in a circular shape to collect and cool the discharged air.

And the hot air generated while the air discharged to the air hole 42' of the air discharge pipe 42 cools the inner surface 52 of the synthetic resin pipe 50 is an air exhaust formed in front of the air discharge pipe 42 It is to be discharged to the outside through the air discharge hole (43 ') perforated in a number of the publication (43).

And, as shown in Figures 6 and 9, the die (41') using the air bracket 41' according to another embodiment of the present invention, that is, the air bracket 41' in which a plurality of circular protrusions 45 are formed on the outer circumferential surface. When the inside of the synthetic resin pipe 50' guided to the cooler 30a of 30 is supported, the inner surface of the synthetic resin pipe 50 is supported by the circular protrusion 45 formed on the outer surface of the air bracket 41'. Since the concave portion 53 and the convex portion 54 are also formed at 52 , the strength of the synthetic resin pipe 50 ′ can be reinforced and the flow rate can be quickly induced. At this time, the synthetic resin pipe 50 ′ extruded through the extruder 20 may be extruded by separating the hollow molded part 21 formed at the end of the extruder 20 so that the hollow part 51 is not formed.

On the other hand, the rail 60 is installed and the manufacturing apparatus of the present invention is mounted and mounted on a transport means 70 or a ship (refer to FIG. 4) or a trailer (refer to FIG. 3) for transporting the rail 60 on the site. While directly molding the synthetic resin pipe 50 having the hollow part 51 in the field, it can be installed on the spot.

That is, after installing the rail 60 next to the site for installing the synthetic resin pipe 50, in the synthetic resin pipe manufacturing apparatus mounted on the transport means 70 for transporting the rail, in the longitudinal direction as in the above-described embodiment. As a result, the synthetic resin pipe 50 having the spiral hollow part 51 formed therein is directly buried in the field while forming, so that the construction is simple and quicker.

In addition, the synthetic resin pipe 50 molding device having the spiral hollow part 51 in the longitudinal direction installed in the trailer can be moved to the site, and the synthetic resin pipe 50 can be directly molded and constructed at the site.

On the other hand, as one of the characteristics of the pipe manufacturing apparatus with improved durability according to the present invention, it further includes a rotation driving means (90),

The rotation driving means 90 is

As shown in Figure 8,

For transmitting rotational power to the air supply pipe 40,

A driven sprocket 91 coupled to the end of the air supply pipe 40 disposed in the cooler 30a of the die 30;

A rotary drive motor 93 having a shaft to which the drive sprocket 92 is coupled, and

A rotating belt 94 interconnecting the driven sprocket 91 and the driving sprocket 92

is made including

As a result, the rotation belt 94 is rotated by the rotation drive motor 93, so that the driven sprocket 91 and the air supply pipe 40 to which the driven sprocket 91 and the air supply pipe 40 are coupled are rotated, and the air supply pipe 40 and The air bracket 41, the air discharge pipe 42, and the air discharge plate 43 formed integrally are rotated together.

Therefore, as the air supply pipe 40, the air bracket 41, the air discharge pipe 42, and the air discharge plate 43 rotate, the air sprayed is evenly sprayed on the inner surface 52 of the synthetic resin pipe 50. Of course, the sprayed air can be combined and moved along the inner surface 52 of the synthetic resin pipe 50, thereby preventing deterioration in quality that may occur due to the temperature difference between the sprayed air, through which the synthetic resin of uniform quality The tube 50 may be manufactured.

And the configuration of the rotation driving means 90 is an example, and it will be possible to variously deform and change within a range that satisfies the conditions for rotating the air supply pipe 40 .

On the other hand, as another feature of the pipe manufacturing apparatus with improved durability according to the present invention,

As shown in Figures 7 and 8,

A plurality of recesses 431 are formed in the air discharge plate 43 to be recessed at equal intervals along the circumference of the outer circumferential surface to discharge hot air to the outside together with the air discharge hole 43 ′.

At this time, each of the recesses 431 has a semicircular groove structure, and the hot air is discharged to the outside together with the air discharge hole 43'. By allowing it to be discharged to the outside, the hot air may not properly escape due to the clogged space between the inner surface 52 of the synthetic resin pipe 50 and the air discharge plate 43, and may stagnate, and thus the cooling treatment is not performed properly. Therefore, each of the recesses 431 helps the hot air to be directly exhausted to the outside.

On the other hand, as another feature of the pipe manufacturing apparatus with improved durability according to the present invention, it further includes a cooling water circulation unit 100,

The cooling water circulation unit 100

As shown in Figures 10 to 12,

The hollow first tank 101,

The second tank 102 in which the refrigerant is accommodated,

a cooling water storage tank 103 disposed between the first and second tanks 101 and 102;

A circulation pipe body 104 for supplying the cooling water stored in the storage tank 103 to the cooler 30a side of the die 30 and then recovering it to the storage tank 103 side;

A flexible (flexible) type first pipe body 105 interconnecting the first tank 101 and the storage tank 103,

A flexible second pipe body 106 interconnecting the second tank 102 and the storage tank 103,

A relay pipe 107 disposed in the storage tank 103 and interconnecting the first and second pipes 105 and 106, and

Tank elevating means 108 for selectively elevating the first and second tanks 101 and 102 up and down

is made including

Here, the refrigerant stored in the second tank 102 is preferably liquid nitrogen, but may be replaced with another material capable of cooling the cooling water to an appropriate temperature through heat exchange with the cooling water in addition to liquid nitrogen.

In addition, the first and second tubular bodies 105 and 106 are formed of a flexible tubular structure that can be freely bent and increased in length.

In addition, a plurality of heat dissipation fins 107a are disposed on the relay pipe 107 in the longitudinal direction thereof, and the heat dissipation fins 170a can increase the contact area with the cooling water, thereby increasing heat exchange efficiency.

And the tank elevating means 108 consists of a pneumatic cylinder body having a piston end connected to the lower surface of the tank and a built-in piston to move the piston up and down by selective air supply, and the piston moves up and down For stable operation, a pillar or auxiliary block that can guide this operation may be further provided. The tank lifting means 108 made in this way is disposed on the lower surfaces of the first and second tanks 101 and 102, respectively, and the operation is controlled by a separate controller.

As an example of the operation control, the tank elevating means 108 disposed on the lower surface of the second tank 102 among the first and second tanks 101 and 102 by a controller according to a value sensed by an external manipulation or a sensor. ), the refrigerant flows from the second tank 102 raised to the other side of the first tank 101 side, and the refrigerant flowing in this way passes through the relay pipe 107, and the refrigerant passes through the relay pipe 107 Cooling to an appropriate temperature for the cooling water is possible so that heat exchange between the cooling water and the cooling water recovered to the storage tank 103 is achieved.

This time, as the tank elevating means 108 is driven and controlled by the controller, the first tank 101 rises, and the second tank 102 descends and returns to the original position, so that the refrigerant flows and is stored in the first tank ( 101), it is possible to transfer the refrigerant to the opposite side, that is, to the side of the second tank 102 in which the first refrigerant was stored. As the refrigerant transfer is repeated, the cooling water is cooled.

Accordingly, the first and second tanks 101 and 102 are selectively moved by the tank lifting means 108 while the refrigerant moves between each other, and the refrigerant passing through the relay pipe 107 and the storage tank ( 103), heat exchange between the recovered cooling water is performed.

On the other hand, as another feature of the pipe manufacturing apparatus with improved durability according to the present invention, it further includes a cooling water temperature control unit 200 and a cooling air supply pipe 300,

The cooling water temperature control unit 200

As shown in Figures 10 to 12,

A support 201 for supporting the outlet disposed inside the storage tank 103 in the circulation pipe 104, and

Support elevating means 202 for raising and lowering the support 201 up and down

is made including

At this time, the support 201 is made of a plate-shaped plate spaced apart from the upper side of the storage tank 103 or a bar-shaped structure that crosses the upper side of the storage tank 103, and the circulation tube body 104 of the outlet is fixedly coupled to the support 201 .

And as shown in FIG. 10, the support lifting means 202 includes a pedestal 202a mounted on the outer wall of the storage tank 103, and a screw fastened to the end side of the support 201 past the pedestal 202a. It consists of a 202b and a screw driving part 202c that provides rotational power to the screw 202b.

In particular, the screw driving unit 202c provides rotational power to the screw 202b by cross-shaft gears that are respectively coupled to the lower end of the screw 202b and the shaft of the driving motor to engage with each other.

In addition, a fixed base 202d mounted on the outer wall of the storage tank 103 so that the support 201 can vertically reciprocate by rotating the screw 202b, and the fixed base 202d is inserted into the A guide post (202e) that slides and is coupled to the end of the support (201) may be further provided.

Therefore, the vertical position of the support 201 can be adjusted by the support elevating means 202 , and the outlet height of the circulation pipe 104 in the storage tank 103 can be adjusted by this adjustment. As a result, as the distance between the outlet of the circulation tube 104 and the relay tube 107 is adjusted, the cooling water is cooled by varying the falling time, distance, and spraying range of the coolant sprayed through the outlet of the circulation tube 104 . You will be able to control the temperature.

The cooling air supply pipe 300 is

As shown in Figures 10 to 12,

The storage tank 103 and the air discharge pipe 42 are interconnected and the air cooled in the storage tank 103 is provided with a tubular structure for supplying the air to the air discharge pipe 42 side.

After all, by supplying the cold air generated during heat exchange between the refrigerant and the coolant to the air discharge pipe 42 side without exhausting it to the outside, by using it for cooling the inner surface 52 of the synthetic resin pipe 50, energy consumption is reduced can be reduced and the cooling efficiency can be increased.

On the other hand, as another example of the pipe manufacturing apparatus with improved durability according to the present invention as shown in Figure 12,

The storage tank 103 is provided with two or more arranged in a line,

The outlet of the circulation pipe body 104 is divided into two or more first circulation branch pipes 104a,

Each of the first circulation branch pipe (104a) is disposed inside the two or more storage tanks (103), respectively, the arrangement height of each of the first circulation branch pipe (104a) is different from each other,

The inlet of the cooling air supply pipe 300 is branched into two or more supply branch pipes 301 , connected to each of the two or more storage tanks 103 , and a supply portion of one of the respective supply branch pipes 301 by a distribution port 302 . Air of the engine 301 is selected and supplied to the air discharge pipe 42 side,

The inlet of the circulation tube body 104 is divided into two or more second circulation branch pipes 104b,

Each of the second circulation branches 104b is connected to the bottom side of two or more of the storage tanks 103, respectively, and the second circulation of one of the respective second circulation branches 104b by the circulation distribution port 104c The cooling water of the branch pipe 104b is selected and supplied to the cooler 30a side of the die 30 .

As a result, the temperature of the coolant and the heat exchanged coolant in the respective storage tanks 103 are different from each other. are different from each other, and it is also possible to select and use cooling air having a different temperature.

On the other hand, as shown in FIG. 13, the cooler 30a can be divided into several vacuum zones, which are divided by the diaphragm 30b of the valve, and a synthetic resin pipe is located at the center of the diaphragm 30b. A hole is formed to allow the passage of 50 to pass, and in particular, the hole is narrower and in close contact with the outer circumferential surface of the synthetic resin pipe 50 so as to block the flow of cooling air between adjacent vacuum zones, Cooling air having a different temperature is supplied to each vacuum zone from each of the supply branch pipes 301 . While controlling the temperature of the cooling air, it is possible to produce high-quality pipes by appropriately supplying cooling air of different temperatures to each vacuum zone.

In the above description of the present invention, with reference to the accompanying drawings, "a pipe manufacturing apparatus with improved durability" having a specific shape and structure has been mainly described, but the present invention can be variously modified and changed by those skilled in the art, and such modifications and changes should be construed as belonging to the protection scope of the present invention.

10: raw material supply device
20: extruder
21: hollow molding part
22: expansion tube
30: Dice
30a: cooler
30b: diaphragm
40: air supply pipe
41, 41' : Air bracket
42: air discharge pipe
42' : air ball
43: air exhaust plate
43' : Air exhaust hole
431: recess
44: air ball
45: circular projection
50, 50' : Synthetic resin tube
51: hollow
52: inner surface
53: Yobu
54: iron
60: rail
70: transport means
90: rotation driving means
91: driven sprocket
92: drive sprocket
93: rotation drive motor
94: rotating belt
100: cooling water circulation unit
101: first tank
102: second tank
103: storage tank
104: circulation tube
104a: first circulation branch
104b: second circulation branch
104c: circulation distribution hole
105: first tube
106: second tube
107: relay body
107a: heat sink fin
108: tank elevating means
200: cooling water temperature control unit
201 : support
202: support elevating means
202a: pedestal
202b: screw
202c: screw driving part
202d : Fixed pedestal
202e: guide pillar
300: cooling air supply pipe
301: supply branch pipe
302: distribution hole

Claims (7)

An extruder 20 for extruding the synthetic resin tube 50 through the hollow molding unit 21 so that the hollow portion 51 is formed in a spiral shape in the longitudinal direction while slowly rotating the resin supplied from the raw material supply device 10;
The front of the air supply pipe 40 formed inside the extruder 20 to support the inner surface 52 of the synthetic resin pipe 50 that is extruded from the extruder 20 and introduced into the cooler 30a of the die 30 There is an air bracket 41 formed in a cylindrical shape equal to the inner diameter of the synthetic resin pipe 50;
an air discharge pipe 42 in which a plurality of air holes 42' are formed in order to cool the inner surface of the synthetic resin pipe 50 forward of the air bracket 41;
In the front of the air discharge pipe 42, the air discharged through the air hole 42' can discharge the hot air generated while cooling the inner surface of the synthetic resin pipe 50 to the outside, the air discharge hole (43') A plurality of perforated air outlet plate 43 on this disk;
An air hole 44 is provided so that air is also discharged from the rear of the air bracket 41 so that the hollow part 51 of the synthetic resin pipe 50 in which the hollow part 51 is formed while being extruded from the extruder 20 can be cooled. A plurality of perforated air supply pipe 40; and
a rotation driving means 90 for transmitting rotational power to the air supply pipe 40;
The air supply pipe 40 and the air supply pipe 40 formed integrally with the air supply pipe 40, the air bracket 41, the air discharge pipe 42, and the air discharge plate 43 are formed by the rotation driving means 90. rotate together,
A plurality of recesses 431 are formed in the air discharge plate 43 to be concave at equal intervals along the circumference of the outer circumferential surface to discharge hot air to the outside together with the air discharge hole 43'. Pipe manufacturing equipment with improved durability.
delete The method of claim 1,
The hollow first tank 101 and
A second tank 102 in which the refrigerant is accommodated, and
a cooling water storage tank 103 disposed between the first and second tanks 101 and 102;
a circulation pipe body 104 for supplying the coolant stored in the storage tank 103 to the cooler 30a of the die 30 and then recovering it to the storage tank 103;
And a flexible (flexible) type first pipe body 105 interconnecting the first tank 101 and the storage tank 103,
a flexible second pipe body 106 interconnecting the second tank 102 and the storage tank 103;
a relay pipe 107 disposed in the storage tank 103 and interconnecting the first and second pipes 105 and 106;
Tank elevating means 108 for selectively elevating the first and second tanks 101 and 102 up and down
The first and second tanks 101 and 102 are selectively lifted by the tank elevating means 108 to allow movement of refrigerant between each other, and the refrigerant passing through the relay pipe 107 and the storage The apparatus for manufacturing a pipe with improved durability, characterized in that it further comprises a cooling water circulation unit (100) that allows heat exchange between the cooling water recovered to the tank (103).
4. The method of claim 3,
A pipe manufacturing apparatus with improved durability, characterized in that a plurality of heat dissipation fins (107a) are disposed on the relay body (107) along its longitudinal direction.
5. The method of claim 4,
A cooling water temperature control unit ( 200), and a cooling air supply pipe 300 that interconnects the storage tank 103 and the air discharge pipe 42 and supplies the air cooled in the storage tank 103 to the air discharge pipe 42 side. Pipe manufacturing apparatus with improved durability, characterized in that it further comprises.
6. The method of claim 5,
The storage tank 103 is provided with two or more arranged in a line,
The outlet of the circulation pipe body 104 is divided into two or more first circulation branch pipes 104a,
Each of the first circulation branch pipe (104a) is disposed inside the two or more storage tanks (103), respectively, the arrangement height of each of the first circulation branch pipe (104a) is different from each other,
The inlet of the cooling air supply pipe 300 is branched into two or more supply branch pipes 301 , connected to each of the two or more storage tanks 103 , and a supply portion of one of the respective supply branch pipes 301 by a distribution port 302 . A pipe manufacturing apparatus with improved durability, characterized in that the air of the engine (301) is selected and supplied to the air discharge pipe (42) side.
7. The method of claim 6,
The inlet of the circulation tube body 104 is divided into two or more second circulation branch pipes 104b,
Each of the second circulation branches 104b is connected to the bottom side of two or more of the storage tanks 103, respectively, and the second circulation of one of the respective second circulation branches 104b by the circulation distribution port 104c A pipe manufacturing apparatus with improved durability, characterized in that the cooling water of the branch pipe (104b) is selected and supplied to the cooler (30a) side of the die (30).

Images