KR20160080967A - Appratus for forming corrugated pipe - Google Patents

Abstract

The present invention relates to an apparatus for forming a corrugated pipe, which cools a corrugated pipe rapidly to improve the productivity, and winds the corrugated pipe in the form of a roll after it is cooled rapidly and solidified in a linear shape so that the corrugated pipe may be disposed rapidly and easily by the restoration force thereof by which it returns to its original linear and solidified state upon the dewinding of the wound corrugated pipe in a work place. The apparatus for forming a corrugated pipe comprises: an extrusion section for heating raw materials and supplying them to the outside; a mold section installed in the vicinity of the extrusion section for molding the raw materials supplied through the extrusion section into a corrugated pipe; an external cooling unit for cooling the external surface of the corrugated pipe molded from the mold section; and an internal cooling unit linked to the extrusion section so that it may be disposed inside the corrugated pipe, and cooling the internal surface of the corrugated pipe, in order to cooling the outside and the inside of the corrugated pipe coincidentally.

Description

[0001] APPRATUS FOR FORMING CORRUGATED PIPE [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bellows pipe forming apparatus, and more particularly, to a bellows pipe forming apparatus for producing a bellows pipe through a raw material formed of a synthetic resin.

Generally, corrugated pipes are used to protect wires, telephone lines, optical cables, etc. buried in the ground.

The corrugated tube is made of synthetic resin as a raw material, and the ring-shaped protruding portion and the groove portion are alternately formed, and are produced in the corrugated tube forming apparatus. The bell pipe forming apparatus melts the synthetic resin to form a bellows shape.

When a molten synthetic resin material is supplied, a conventional corrugated pipe forming apparatus rotates a caterpillar mold along a rail and forms a molten synthetic resin raw material into a corrugated pipe shape. The caterpillar mold is composed of a combination of a ring-shaped protrusion and a mold block alternately formed with a groove.

At this time, since the corrugated tube formed in the corrugator molding apparatus is at a high temperature, it is cooled by the cooling water provided from the outside.

However, in the conventional method, only the outer surface of the corrugated tube is cooled, so that the inner surface is not cooled. As a result, the time required for cooling the corrugated tube becomes longer and the production amount is reduced.

On the other hand, the corrugated tube is considerably large in size and weight, and the length of the corrugated tube is also considerably long, so that it can be rolled up in the form of a roll during the production process and transported to the installation site.

As described above, when the corrugated pipe is rolled up in the process of producing the corrugated pipe, the corrugated pipe is wound in a completely uncooled state and hardened.

The corrugated pipe is mainly used for electric power construction, construction site and road construction. At this time, since the corrugated tube is used in a linear form instead of being wound in a roll form, the worker is required to further expand the corrugated tube.

However, if the corrugated tube is hardened as described above, much labor and time are required to spread the corrugated tube. Even when the torch corrugated tube is heated and stretched, there is a risk of fire, which causes a serious problem of lowering the durability of the product.

Korean Patent Publication No. 10-1329556 (entitled: Extruder equipped with cooling means)

SUMMARY OF THE INVENTION An object of the present invention is to provide a corrugator molding apparatus for rapidly cooling a corrugated tube to improve the production amount.

Another object of the present invention is to provide a method and apparatus for quickly and easily cooling a corrugated pipe by a quick and easy cooling of a corrugated pipe and then winding the corrugated pipe in a roll form, Which is capable of disposing a bellows pipe.

Other objects and advantages of the present invention will become apparent to those skilled in the art from the following detailed description.

A bellows forming apparatus according to an embodiment of the present invention includes an extruding portion for melting and heating a raw material and then supplying the molten raw material to the outside, a mold portion for forming a bellows pipe, which is provided adjacent to the extruding portion, An outer cooling unit for cooling the outer surface of the corrugated tube formed in the mold part; and an inner cooling unit coupled to the extruded part to be disposed inside the corrugated tube and cooling the inner surface of the corrugated tube, And a cooling section for simultaneously cooling the inner surface and the inner surface.

For example, the internal cooling unit may include first cooling means for cooling external air and directly spraying the internal surface of the corrugated tube to accelerate cooling of the corrugated tube.

For example, the internal cooling unit may include second cooling means for supplying external air to the corrugated tube to cool the inside surface of the corrugated tube and to discharge heated air in the corrugated tube internal space to the outside.

For example, the first cooling unit may include a cooler that draws outside air to generate cool air, a transfer pipe that supplies cool air generated in the cooler to the inside of the corrugated pipe, And a cover which is coupled to the conveyance pipe and prevents the cool air injected from the nozzle from contacting with the extrusion part.

For example, the second cooling means may include a blower, a conveyance pipe for supplying the wind pressure generated by the blower to the inside of the corrugated pipe, and a conveyor connected to the conveyance pipe, Nozzle.

For example, the conveyance pipe may include a heat insulating member coupled to the conveyance pipe to prevent the conveyance pipe from absorbing the heat provided by the extrusion unit.

As described above, the corrugated pipe forming apparatus according to an embodiment of the present invention has an advantage that the inside and the outside of the corrugated tube can be cooled simultaneously through the cooling part including the external cooling part and the internal cooling part. As a result, the cooling time of the corrugated pipe can be shortened and the production amount can be greatly increased. That is, the improvement of the production due to the shortening of the cooling time can lower the production cost, which can increase the price competitiveness, thereby allowing the producers to obtain higher profit.

In addition, the cover prevents cold air injected from the nozzle from being supplied to the extruding portion and the mold portion. Therefore, there is an effect that the cool air jetted from the nozzle is intensively provided to a portion of the corrugated tube to be cooled. Further, there is an effect of lowering the internal temperature of the corrugated tube by the cool air which still has a cool airflow, by guiding the cool air that is injected from the nozzle and primarily cooled the inner surface of the corrugated tube toward the outside of the corrugated tube.

That is, the internal temperature of the corrugated pipe can be lowered entirely in the course of intensively cooling the inner surface of the corrugated pipe and discharging it to the outside of the corrugated pipe, so that the cooling rate of the corrugated pipe can be increased and the production amount can be remarkably improved. Further, since the time for cooling the corrugated pipe is drastically shortened, the corrugated pipe is wound in a roll form and wound in a state where the cooling is completed in a straight line state. Thus, when the corrugated pipe wound in roll form is unwound, Can be disposed at a position where construction is to be performed, thereby improving the work efficiency.

In addition, since the nozzle can be rotated using the pressure of the cool air supplied from the cooler through the nozzle when the cool air is blown to the outside through the nozzle, the inner surface of the corrugated pipe can be uniformly cooled. Accordingly, it is possible to prevent the problem that the specific portion of the corrugated tube is intensively cooled and the corrugated tube is shrunk and deformed, thereby preventing defects.

The effects of the present invention will be clearly understood and understood by those skilled in the art, either through the specific details described below, or during the course of practicing the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a configuration diagram of a bellows pipe forming apparatus according to an embodiment of the present invention; Fig.
Fig. 2 is a schematic view of a corrugated pipe forming apparatus according to another embodiment of the present invention
3 is a schematic view of a corrugated pipe forming apparatus according to another embodiment of the present invention
4 is a cross-sectional view of a transfer tube according to an embodiment of the present invention.
5 is a plan view of a nozzle according to an embodiment of the present invention.
6 is a schematic view of a corrugated pipe forming apparatus according to another embodiment of the present invention

The present invention is capable of various modifications and various forms, and specific embodiments are illustrated in the drawings and described in detail in the following description. It should be understood, however, that the invention is not intended to be limited to the particular forms disclosed, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

The terms first, second, etc. may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In the present application, the terms "comprising" or "having ", and the like, are intended to specify the presence of stated features, integers, steps, operations, elements, parts, or combinations thereof, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, parts, or combinations thereof.

Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

Terms such as those defined in commonly used dictionaries are to be interpreted as having a meaning consistent with the meaning in the context of the relevant art and are to be interpreted as ideal or overly formal in meaning unless explicitly defined in the present application Do not.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference will now be made in detail to preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings.

FIG. 1 is a configuration diagram of a billowing tube forming apparatus according to an embodiment of the present invention, FIG. 2 is a configuration diagram of a billowing tube forming apparatus according to another embodiment of the present invention, FIG. 5 is a plan view of a nozzle according to an embodiment of the present invention, and FIG. 6 is a cross-sectional view of another embodiment of the present invention. Fig. 2 is a configuration diagram of a bellows pipe forming apparatus according to the present invention;

1 to 5, a bellows pipe forming apparatus 1000 according to an embodiment of the present invention may include an extrusion unit 100, a mold unit 200, and a cooling unit 300.

The extruding unit 100 melts the raw material by heating and then supplies it to the outside. For example, the extrusion part 100 heats the synthetic resin to make it melted and supplies it to the outside. The extrusion unit 100 may include a raw material supply unit 110, a barrel 120, a screw 130, a motor 140, and a die 150.

The raw material supply unit 110 is partly coupled to the barrel 120. The raw material supply part 100 includes a container capable of storing raw materials. The raw material supply unit 110 supplies a synthetic resin raw material having a predetermined size to the barrel 120. The raw material supply unit 110 may include supply adjusting means (not shown) for adjusting the amount of the raw material supplied to the barrel 120.

The barrel 120 has a cylindrical inner space. The barrel 120 can receive the screw 130 in the internal space and is connected to the raw material supply part 110 to receive the raw material. The barrel 120 may be melted by applying heat to the raw material. In other words, the barrel 120 may be heated to a molten state. To this end, the barrel 120 may include a heating means (not shown).

The screw 130 is disposed inside the barrel 120 and is rotatably coupled with respect to an axis. The screw 130 is supplied to the barrel 120 and supplies the raw material to the die 150 in a molten state. For this purpose, the motor 140 may be coupled to one side of the screw 130. The motor 140 transmits power to rotate the screw 130. For example, the motor 140 may be coupled to the screw 130 through a gear or a belt to transmit power.

The die 150 supplies the molten raw material provided by the screw 130 to the outside. The die 150 may have a space through which the raw material can flow. Also, the die 150 may include a receiving hole 151 in which the cooling unit 300 can be partially accommodated.

The mold part 200 is installed adjacent to the extrusion part 100. The mold part 200 forms a corrugated pipe with a raw material supplied through the extrusion part 100.

The mold part 200 forms the corrugated tube through the molten raw material provided by the extrusion part 100. The mold part 200 may include a rail 210 and a mold block 220.

The rails 210 are disposed on both sides of the extrusion portion 100. For example, the rail 210 may be installed on a floor or an installation plate (not shown) adjacent to the extrusion unit 100. remind. The mold block 220 may be rotated on the rail 210 in a predetermined orbit. For this purpose, the rail 210 may be formed as a rectangle or a circular polygon. In addition, the rail 210 may include a conveying means (not shown) for conveying the mold block 220.

A plurality of the mold blocks 220 are installed on the rails 210 provided on both sides of the extrusion part 100 and are rotated together with the rails 210. Here, the mold block 220 may be formed into a straight corrugated pipe when the mold blocks 220 installed on both sides of the rail 210 are engaged with each other. For this, a half of the corrugated pipe shape may be engraved in the one mold block 220.

A plurality of the mold blocks 220 are installed on the rails 210 provided on both sides of the extrusion portion 100. Specifically, the mold block 220 is disposed on both sides of the extrusion portion 100 and rotates along the rail 210. The mold block 220 molds the raw material so as to correspond to the corrugated pipe shape engraved in the mold block 220 by using the molten raw material supplied from the extrusion part 100. Specifically, the mold block 220 may be adsorbed so that the molten material supplied from the extrusion unit 100 closely contacts the surface of the corrugated tube engraved inside the mold block 220. In addition, it is possible to provide wind pressure from the outside so that the raw material can adhere to the surface of the corrugated pipe engraved inside the mold block 220.

Meanwhile, referring to FIG. 6, the mold part 200 can mold a raw material in a molten state by rotating the mold block 230 formed in a cylindrical shape. For this, the mold part 200 may include a mold block 230 and a power part 240.

The mold block 230 is disposed adjacent to the extrusion portion 100. For example, the mold block 230 is disposed adjacent to an end of the die 150. Specifically, the mold block 230 may be installed at an end of the die 150 through which the molten synthetic resin material is discharged. The mold block 230 forms a corrugated tube using the raw material provided in the die 150. For example, the mold block 230 may mold a helical tube. The mold block 230 receives power through the power unit 240 and rotates in one direction. For example, the mold block 230 rotates so that the formed corrugated tube faces the opposite side of the die 150. That is, the mold block 230 can rotate so that the molded corrugated pipe is discharged to the outside.

Meanwhile, the mold block 230 itself rotates to form a corrugated pipe. For this, the shape of the corrugated pipe may be engraved in the mold block 230 so that the corrugated pipe formed by the rotation may be discharged. Specifically, a pair of helical protrusions and grooves may be formed in the mold block 230 to be engraved. The mold block 230 rotates in place without moving back and forth, and can discharge a corrugated tube formed through a pair of helical projections and depressions formed intaglioly inside.

By way of analogy, the mold block 230 can be compared with a nut, and the molded corrugated pipe can be compared with a bolt. Specifically, when the nut rotates, the mold block 230 rotates and the molded corrugated pipe can be discharged to the outside as if the bolt can move to one side or the other side along the helix formed on the nut.

Meanwhile, the mold block 230 may be formed of a pair of mold blocks 230 for convenience of processing. Of course, it is preferable that the spiral grooves and projections formed intaglioly inside when they are coupled to each other are formed without misalignment.

The power unit 240 provides power to the mold block 240 to allow the mold block 230 to rotate. The power unit 240 is coupled to the mold block 230. For example, the power unit 240 may be fastened to the mold block 230 through a gear. To this end, the power unit 240 may include a motor 240a and a pair of gears 240b.

The motor 240a provides a rotational force to any one of the pair of gears 240b.

The pair of gears 240b are distributed and coupled to the motor 240a and the mold block 230, respectively. The pair of gears 240b provide a rotational force provided by the motor 240a to the mold block 230 so that the mold block 230 can be rotated.

The cooling unit 300 may simultaneously cool the outer surface and the inner surface of the bellows pipe, and may include an outer cooling unit 310 and an inner cooling unit 320.

The outer cooling part 310 cools the outer surface of the corrugated tube formed in the mold part 200 and discharged to the outside. For example, the external cooling unit 310 may cool the corrugated tube by spraying cooling water on the outer surface of the corrugated tube. For this, the external cooling part 310 may include a plurality of nozzles 311 around the corrugated tube formed and discharged from the mold part 200. The external cooling part 310 may be connected to the nozzle 311 to supply the cooling water to the nozzle 311, And the like.

The inner cooling part 320 is coupled to the extrusion part 100 so as to be disposed inside the bellows pipe. The inner cooling part 320 cools the inner surface of the bellows pipe.

The internal cooling unit 320 may include a first cooling unit 321 and a second cooling unit 322.

The first cooling means 321 can accelerate cooling of the corrugated tube by spraying the cooled air directly onto the inner surface of the corrugated tube.

The first cooling means 321 may include a cooler 321a, a transfer tube 321b, a nozzle 321c, and a cover 321d.

The cooler 321a draws outside air to generate cool air. The cooler 321a may be an industrial cooler. Specifically, the cooler 321a may be a chiller cooler.

The transfer pipe 321b provides cool air generated in the cooler 321a to the inside of the corrugated pipe. One end of the transfer pipe 321b is coupled to the cooler 321b and the other end is disposed inside the corrugated tube through a receiving hole 151 formed in the die 150. [

The nozzle 321c is coupled to the conveyance pipe 321b and injects the cool air provided from the conveyance pipe 321b to the inner circumferential surface of the corrugated pipe. The nozzle 321c may be formed of a metal material and may have a plurality of through holes formed therein.

Referring to FIG. 5, the nozzle 321c may include a base 321c-1, a bearing 321c-2, and a blade 321c-3.

In the base 321c-1, a circular plate is spaced apart by a predetermined distance, and a blade 321c-3 is formed between the base 321c-1 and the base 321c-1. An accommodation space for accommodating the bearing 321c-2 is formed on the base 321c-1.

Meanwhile, the nozzle 321c may be formed with a coupling hole (not shown) to which the nozzle 322c included in the second cooling unit 322 can be coupled. The first cooling unit 310 and the second cooling unit 320 included in the cooling unit 300 may be selectively installed in the corrugator molding apparatus 1000. It is preferable that a coupling hole (not shown) is formed in the nozzle 321c included in the first cooling means 310 so that the nozzle 322c included in the second cooling means 320 can be coupled thereto .

The bearing 321c-2 is disposed between the transfer pipe 321b and the base 321c-1 so that the base 321c-1 can rotate with respect to the transfer pipe 321b.

The blade 321c-3 may be provided between circular plates spaced apart from the base 321c-1 by a predetermined distance. The blade 321c-3 is formed to have a predetermined curvature. The blade 321c-3 rotates the nozzle 321c using the pressure of cool air provided along the transfer pipe 321b. Concretely, the curvature formed on the blade 321c-3 changes the discharge direction of the nozzle 321c along the transfer pipe 321b. At this time, the base 321c-1 rotates about the conveyance pipe 321b through the generated thrust.

The cover 321d is coupled to the conveyance pipe 321b to prevent the cold air injected from the nozzle 321c from being supplied to the extrusion unit 100 and the mold unit 200. [ The cover 321d is formed to correspond to the inner diameter of the bellows tube, and is preferably formed of a material having elasticity and resistance to heat. The cover 321d may be formed of silicon.

The extruded portion 100 and the mold portion 200 form a molten raw material in the form of a corrugated pipe. The molten raw material hardens when the temperature is lowered, so that the cooled air flows into the extruded portion 100 and the mold portion 200, a portion of the corrugated tube that can not be formed may occur. If such a defective molding occurs, it is necessary to dispose all of the corrugated pipes having a length of 20 to 30 m, thereby causing a problem of a financial loss as well as an extremely reduced production amount.

The cover 321d prevents the cool air injected from the nozzle 321c from being supplied to the extrusion portion 100 and the mold portion 200. The cool air injected from the nozzle 321c flows through the corrugated pipe There is an effect that it is intensively provided to a part to be cooled. In addition, there is an effect of lowering the internal temperature of the corrugated tube by cooling air that still has a cool airflow, by guiding cold air, which is injected from the nozzle 321c and primarily cooled the inner surface of the corrugated tube, toward the outside of the corrugated tube.

That is, the internal temperature of the corrugated pipe can be lowered entirely in the course of intensively cooling the inner surface of the corrugated pipe and discharging it to the outside of the corrugated pipe, so that the cooling rate of the corrugated pipe can be increased and the production amount can be remarkably improved. Further, since the time for cooling the corrugated pipe is drastically shortened, the corrugated pipe is wound in a roll form and wound in a state where the cooling is completed in a straight line state. Thus, when the corrugated pipe wound in roll form is unwound, Can be disposed at a position where construction is to be performed, thereby improving the work efficiency.

The second cooling means 322 may supply outside air to the corrugated tube to cool the inside surface of the corrugated tube and to discharge the heated air in the corrugated tube internal space to the outside.

The second cooling means 322 may include a blower 322a, a transfer tube 322b, and a nozzle 322c.

The blower 322a generates wind pressure by rotating the fan. The blower 322a may be a blower. The blower 322a is a generally used article and its description is omitted.

The conveyance pipe 322b provides wind pressure generated in the blower 322a to the inside of the corrugated pipe.

One end of the transfer pipe 322b is coupled to the blower 322a and the other end is disposed inside the bell pipe via a receiving hole 151 formed in the die.

The nozzle 322c is coupled to the conveyance pipe 322b and injects the wind pressure provided by the conveyance pipe 322b into the corrugated pipe. The nozzle 322c may be formed of a metal material and may have a plurality of through holes formed therein.

The transfer tubes 322b and 321b may include a heat insulating member 323 for preventing the heat from the extrusion unit 100 from being absorbed by the transfer tubes 322b and 321b .

The heat insulating member 323 may be coupled or attached to surround the transfer tubes 322b and 321b. Alternatively, the heat insulating member 323 may be integrally formed with the transfer tubes 322b and 321b. The heat insulating member 323 is preferably formed of a material having high heat resistance. 4, the heat insulating member 323 may be formed to surround one or two transfer pipes 322b and 321b according to an internal cooling unit 320 installed in the bell pipe forming apparatus 1000 have.

1 to 3, a process of producing a corrugated pipe through the corrugator molding apparatus 1000 according to an embodiment of the present invention and an operation effect will be described.

1 to 3, in order to produce a corrugated pipe, the raw material is first supplied to the raw material supply part 110. [ When the raw material is supplied, the raw material supply unit 110 supplies the raw material to the barrel 120. When the raw material is supplied to the barrel 120, the raw material is heated by the heating means (not shown) provided in the barrel 120 to be melted. At this time, the screw 130 is rotated by the motor 140 to supply the raw material changed into the melted state toward the die 150. The die 150 is provided to the mold part 200 through a space through which the raw material can flow, through the screw 130. The mold part 200 forms a corrugated pipe with the raw material supplied from the die 150.

Specifically, when the raw material is supplied from the die 150, a plurality of mold blocks 220 are disposed along the rails 210 on both sides of the die 150. The mold block 220 is engaged with the rail 210 and rotated. At this time, the mold blocks 220 can form a corrugated pipe shape that is intimately connected to each other. That is, one molding block 220 is formed with half of the corrugated pipe shape.

The raw material supplied from the die 150 to the mold part 200 is brought into close contact with the surface of the corrugated tube engraved in the pair of mold blocks 220 engaged with each other. At this time, the mold block 220 adsorbs the raw material so that the raw material is smoothly adhered to the surface of the mold block 220 to be formed. The rail 210 rotates the mold block 220 and forms a raw material on the entire pair of the mold blocks 220 to form the mold. When the raw material is closely adhered to the pair of mold blocks 220, the rail 210 moves the pair of the mold blocks 220 adjacent to the die 150 to be engaged with each other, .

This process is repeated and a corrugated tube is produced. The pair of the mold blocks 220 are rotated along the rail 210 after the raw material is closely attached to the mold block 220 so that the corrugated pipe can be stably formed. This is because if the mold block 220 is detached too quickly, the uncompacted corrugated tube may flow down to cause defects.

When the corrugated pipe is produced and discharged from the mold part 200, the cooling part 300 operates to cool the outer surface and the inside of the corrugated pipe.

A process of cooling the corrugated pipe through the cooling unit 300 will be described below. First, the external cooling part 310 and the internal cooling part 320 cool the outside and inside of the corrugated tube formed and discharged from the mold part 200.

The external cooling part 310 is disposed outside the bellows tube at a predetermined interval, and injects cooling water provided from the outside through the nozzle 311 to the outer surface of the bellows tube. At this time, the nozzles 311 are arranged in an appropriate amount in the upper, lower, left, and right directions of the bellows tube to uniformly spray the cooling water to the bellows tube.

At least one of the first cooling unit 321 and the second cooling unit 322 may be installed in the inner cooling unit 320 to cool the inside of the corrugated pipe. That is, the internal cooling unit 320 may be installed only one of the first and second cooling units 321 and 322. Or both the first and second cooling means 321 and 322 may be installed. For convenience of explanation, a process of cooling the inside of the corrugated pipe using both the first cooling water stage (321) and the second cooling means (322) will be described.

First, the cooler 321a and the blower 322a operate. The cooler 321a cools the outside air to generate cold air at a low temperature. The blower 322a drives the fan by the motor to generate wind pressure. Then, the cooler 321a and the blower 322a provide cold air and wind pressure to the transfer pipes 321b and 322b. As shown in FIG. 4, the transfer tubes 321b and 322b can prevent heat loss by the heat insulating member and can be installed in one of the first and second cooling units 321 and 322 according to whether the first and second cooling units 321 and 322 are installed. A transfer pipe 321b, 322b, or two transfer pipes 321b, 322b. The cold air and the wind pressure conveyed along the conveyance pipes 321b and 322b are supplied to the inside of the corrugated tube through the nozzles 321c and 322c. At this time, the cool air provided from the cooler 321a is injected to the side of the nozzle 321c to intensively cool the inner surface of the corrugated tube. The wind pressure provided by the blower 322a is injected to the front of the nozzle 322c to discharge the heat existing inside the bellows pipe to the outside, thereby lowering the internal temperature of the bellows pipe as a whole.

5, the nozzle 321c may rotate the nozzle 321c using the pressure of the coolant supplied from the cooler 321a when the cool air is blown out through the nozzle 321c. Thus, the nozzle 321c uniformly cools the inner surface of the bellows tube.

As described above, the corrugator molding apparatus 1000 according to an embodiment of the present invention cools the inside and the outside of the corrugated tube simultaneously through the cooling unit 300 including the external cooling unit 310 and the internal cooling unit 320 There is an advantage to be able to do. As a result, the cooling time of the corrugated pipe can be shortened and the production amount can be greatly increased. That is, the increase in the production due to the shortening of the cooling time can lower the production cost, which is advantageous in that the price competitiveness can be increased and the producers can obtain higher profit.

In addition, the cover 321d prevents cold air injected from the nozzle 321c from being supplied to the extrusion unit 100 and the mold unit 200. Therefore, there is an effect that the cool air jetted from the nozzle 321c is intensively provided to the portion of the corrugated tube to be cooled. In addition, there is an effect of lowering the internal temperature of the corrugated tube by cooling air that still has a cool airflow, by guiding cold air, which is injected from the nozzle 321c and primarily cooled the inner surface of the corrugated tube, toward the outside of the corrugated tube.

That is, the internal temperature of the corrugated pipe can be lowered entirely in the course of intensively cooling the inner surface of the corrugated pipe and discharging it to the outside of the corrugated pipe, so that the cooling rate of the corrugated pipe can be increased and the production amount can be remarkably improved. Further, since the time for cooling the corrugated pipe is drastically shortened, the corrugated pipe is wound in a roll form and wound in a state where the cooling is completed in a straight line state. Thus, when the corrugated pipe wound in roll form is unwound, Can be disposed at a position where construction is to be performed, thereby improving the work efficiency.

In addition, the nozzle 321c can be rotated by the pressure applied when the cool air provided from the cooler is injected through the nozzle 321c to the outside through the nozzle 321c, so that the inner surface of the corrugated pipe can be uniformly So that it can be cooled down. Accordingly, it is possible to prevent the problem that the specific portion of the corrugated tube is intensively cooled and the corrugated tube is shrunk and deformed, thereby preventing defects.

While the present invention has been described in connection with what is presently considered to be practical and exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

(1000): corrugator molding machine (100): extruder
(200): a mold part (300): a cooling part
(310): external cooling part (320): internal cooling part
(321): first cooling means (321a): cooler
(321b): transfer pipe (321c): nozzle
(321d): cover (322): second cooling means
(322a): blower (322b): conveying pipe
(322c): nozzle

Claims (6)

An extruding part for melting and heating the raw material and supplying it to the outside;
A mold part provided adjacent to the extruding part and forming a corrugated pipe with a raw material supplied through the extruding part; And
An outer cooling unit for cooling the outer surface of the corrugated tube formed in the mold part; and an inner cooling unit coupled to the extruded part to be disposed in the corrugated tube and cooling the inner surface of the corrugated tube, And a cooling portion for simultaneously cooling the inner surface. The method according to claim 1,
The internal cooling unit includes:
And a first cooling means for cooling the outside air to spray directly on the inner surface of the corrugated tube to accelerate the cooling of the corrugated tube. The method according to claim 1,
The internal cooling unit includes:
And second cooling means for supplying outside air to the corrugated tube to cool the inside surface of the corrugated tube and to discharge heated air in the corrugated tube internal space to the outside. 3. The method of claim 2,
Wherein the first cooling means comprises:
A cooler for drawing outside air to generate cold air;
A transfer pipe for supplying cool air generated in the cooler to the inside of the corrugated pipe;
A nozzle coupled to the conveyance pipe and spraying cool air provided from the conveyance pipe to the inner surface of the corrugated pipe; And
And a cover coupled to the conveyance pipe to prevent cool air sprayed from the nozzle from contacting the extrusion portion. The method of claim 3,
Wherein the second cooling means comprises:
air blower;
A conveyance pipe for supplying wind pressure generated in the blower to the inside of the corrugated pipe; And
And a nozzle coupled to the conveyance pipe and injecting the wind pressure provided by the conveyance pipe into the inside of the corrugated pipe. The method according to claim 4 or 5,
The conveying pipe
And a heat insulating member coupled to the conveyance pipe to prevent the transfer tube from absorbing the heat provided by the extrusion unit.

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