KR102287920B1 - Manufacturing apparatus of muliti-tube for air conditioning and heating - Google Patents

Abstract

The present invention relates to a multi-tube protection pipe forming apparatus for cooling/heating piping that forms a protection pipe on the outer periphery of a multi-tube composed of a refrigerant pipe used in a cooling/heating system and a control wire cable. The present invention relates to a molded resin die having a resin flow path through which a synthetic resin in a molten state extruded from an extruder flows, and a molded resin die having an insertion hole penetrating along the protective pipe molding direction of a multi-tube for cooling and heating piping, and in the insertion hole A guide pipe through which a multi-tube composed of a first refrigerant pipe wrapped by a first insulating material and a second refrigerant pipe wrapped by a second insulating material and a control wire cable passed through inserted in a state of forming a thermal isolation layer; A molding block having a molding part for allowing the multi-tube via the guide pipe to pass through, and the synthetic resin via the resin flow path to be molded into a protective tube on the outer periphery of the passing multi-tube, and to the inside of the guide pipe In addition to cooling the multi-tube passing through the guide pipe by supplying air, the inner circumferential surface of the protective tube molded in the forming part comprises an air supply unit that fills the first and second insulating materials while expanding.

Description

Protective pipe forming apparatus of multi-tube for air conditioning and heating piping

The present invention relates to a multi-tube protective tube forming apparatus, and in particular, a multi-tube protective tube for cooling/heating piping in which a protective tube is formed on the outer periphery of a multi-tube composed of a refrigerant tube and a control wire cable used in a cooling/heating system. It relates to molding equipment.

In the cooling and heating system of a building, a control wire cable for controlling the system is installed along with a refrigerant pipe for supplying the cooling and heating medium. In other words, the refrigerant pipe for supplying cooling and heating media and the control wire cable are buried in a slab or wall of a building during construction. is configured, and a protective tube is provided to prevent the multi-tube from being damaged by an external foreign substance or external force, and the multi-tube is inserted into the protective tube. A copper tube is generally used as a refrigerant tube for supplying cooling and heating media, and a protective tube made of synthetic resin is used as a protective tube to protect the copper tube and electric wire and cable.

Patent Document 1 and Patent Document 2 of the following prior art documents disclose general examples of an apparatus for molding a protective tube in a multi-tube for cooling and heating piping.

First, in the apparatus of Patent Document 1, a secondary molding having a round bar structure is molded immediately after molding a primary molding in a state where a tube (refrigerant tube) and a control cable are positioned between a pair of upper and lower plate-shaped insulating materials, and 2 After the secondary molding is wrapped with a pipe-shaped extrudate having a circular cross section, the outer peripheral surface of the secondary molding is melted to be fused to the inner peripheral surface of the pipe-shaped extrudate, and the pipe-shaped extrudate is molded into a spiral protective tube. However, in the device of Patent Document 1, in order to fuse the secondary molding of the refrigerant pipe, the control cable, and the heat insulator to the inner peripheral surface of the pipe-type extrudate, the outer peripheral surface of the secondary molding must be melted. The risk of damage is very high, and since the pipe-type extrudate must be re-molded into a spiral protective tube, there is a problem in that the process and device configuration are complicated.

Next, in the apparatus of Patent Document 2, after preheating a wire cable and a copper tube (refrigerant tube), polyethylene is foamed on the outer periphery to form a heat insulator, and a corrugation molding apparatus in a state in which PVC is foamed on the outer periphery of the heat insulator. is used to form a protective tube with a corrugated tube structure. However, even in the device of Patent Document 2, in order to mold the protective tube on the outer periphery of the insulator, PVC must first be foamed on the outer periphery of the insulator and then be molded into a corrugated tube again using a corrugated molding device. there is a problem.

Republic of Korea Patent Registration No. 10-0910308 (2009.08.04, Announcement) Republic of Korea Patent Registration No. 10-1108225 (2012.02.08. Announcement)

The present invention has been developed in view of the problems of the prior art as described above, and prevents damage to a multi-tube including a refrigerant pipe and a control wire cable due to high-temperature heat during the molding process of the protection pipe, as well as a device An object of the present invention is to provide an apparatus for forming a multi-tube protective tube for cooling and heating piping that can reduce manufacturing costs by simplifying the configuration.

The present invention for achieving the above object is a molded resin die having a resin flow path through which a synthetic resin in a molten state extruded from an extruder flows in, and a molded resin die having an insertion hole penetrating along the protective pipe molding direction of a multi-tube for cooling and heating piping And, a multi-tube composed of a first refrigerant pipe which is inserted in a state of forming a thermal isolation layer in the insertion hole and is wrapped by a first insulating material, a second refrigerant pipe wrapped by a second insulating material, and an electric wire cable for control pass through A forming block having a guide pipe and a forming part that allows the multi-tube through the guide pipe to pass, and synthetic resin through the resin flow path to be molded into a protective tube on the outer periphery of the passing multi-tube, It supplies air to the inside of the guide pipe to cool the multi-tube passing through the guide pipe, and an air supply unit for filling the inner circumferential surface of the protective tube molded in the forming unit while expanding and filling the first and second insulating materials It provides an apparatus for forming a multi-tube protective tube for cooling and heating piping.

In the present invention, the guide pipe is provided with an air hole through which the air supplied from the air supply unit is introduced, the air hole may be formed in a plurality of radially while being inclined in the direction in which the multi-tube passes. there is.

In the present invention, a guide pipe support member for preventing the flow of the guide pipe may be installed in the molded resin die.

In the present invention, the tip portion of the guide pipe may be inserted to extend to the beginning of the forming portion.

In the present invention, a resin inflow guide for reducing the coefficient of friction and thermal conductivity between the molding block and the synthetic resin may be installed at the inlet portion into which the synthetic resin is introduced from the molding block.

In the present invention, a cooling channel through which cooling water flows for cooling the molding block heated by the synthetic resin and the protective tube to be molded is provided inside the molding block, and the cooling water passing through the cooling channel is provided on the outside of the molding block. A cooling water guide member guiding the discharge toward the outer circumferential surface of the protective tube may be installed.

In the present invention, a vacuum acting part for applying a vacuum negative pressure to the molding part is formed in the inside of the molding block, slits communicating with the vacuum acting part are formed in the molding part, and the vacuum acting part is an external vacuum It may be connected to the pump and configured to apply vacuum negative pressure provided from the vacuum pump to the molding part through the slits.

In the present invention, the forming block is provided with a rotating body connected to the forming unit while extending from the inside to the outside of the forming block, and a driving unit connected to the rotating body to rotate the rotating body is provided, forming the protective tube The forming part may be rotated by the rotating body according to the rotational driving of the city driving part.

The protective pipe forming apparatus of the multi-tube for cooling and heating piping of the present invention configured as described above exhibits the following effects.

First, when the guide pipe is inserted into the insertion hole, a thermal isolation layer is formed between the guide pipe and the molded resin die, so that the guide pipe and the inside It is possible to prevent the multi-tube passing through it from being deformed under the influence of heat.

Second, the air supplied from the air supply unit to the inside of the guide pipe cools the multi-tube that passes through being put into the inside of the guide pipe. Heat damage can be prevented.

Third, since the protective tube is directly formed on the outer periphery of the multi-tube composed of the first refrigerant tube wrapped by the first insulation material and the second refrigerant tube wrapped by the second insulation material and the control wire cable, the device configuration is simplified and the process Since this is shortened, the manufacturing cost can be reduced.

Fourth, since the air expands the first and second insulation materials of the multi-tube to fill the inner circumferential surface of the protective tube molded in the molding unit, the first and second refrigerant tubes wrapped by the first insulation material and the second insulation material The refrigerant pipe and the electric wire cable are held by the mountain and valley parts of the protection pipe so that they do not flow in the protection pipe and can be stably maintained in a fixed state.

Fifth, the multi-tube can be precisely guided into the molding part due to the configuration in which the tip of the guide pipe extends to the beginning of the molding part and is inserted.

Sixth, the resin inflow guide is installed at the inlet part where the synthetic resin in the semi-molten state is introduced from the molding block, so that when the synthetic resin in the semi-molten state flows into the molding block, the friction coefficient and thermal conductivity between the molding block and the synthetic resin are reduced by reducing the semi-melting The synthetic resin in its state flows smoothly into the molding part.

1 is a perspective view illustrating a multi-tube for cooling and heating piping in which a protective tube is formed on the outer periphery by the device according to the present invention.
FIG. 2 is a cross-sectional view of the example of FIG. 1 .
3 is a front view of the example of FIG. 1 ;
4 is a diagram illustrating a cross-sectional structure of a protective tube and a heat insulating material in the example of FIG. 1 .
5 is a view showing an embodiment of the protective tube forming apparatus according to the present invention.
6 is an enlarged view of the forming block of FIG. 5 .
7 is a partial cross-sectional view of a guide pipe provided in the embodiment of FIG. 5 .
8 is a front cross-sectional view of a guide pipe provided in the embodiment of FIG. 5 .
9 is a front view of the guide pipe support member provided in the embodiment of FIG.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the following examples are provided so that those of ordinary skill in the art can fully understand the present invention, and can be modified in various other forms, and the scope of the present invention is limited to the examples described below it's not going to be

First, before describing the device according to the present invention, a multi-tube in which a protective tube is formed on the outer periphery will be described.

1 to 3 each show an example of a multi-tube for cooling and heating piping, including a first refrigerant pipe 10 and a second refrigerant pipe 20, and an electric wire cable 30 and a protection pipe 40, there is.

The first refrigerant pipe 10 is used as a high-pressure pipe through which the refrigerant of the cooling/heating system flows at a high pressure, and the second refrigerant pipe 20 is used as a high-pressure pipe through which the refrigerant of the cooling/heating system flows at a low pressure. Each of the first refrigerant pipe 10 and the second refrigerant pipe 20 is generally made of a copper pipe material, and may be made of an aluminum alloy material according to recent trends.

The outer circumferential surface of the first refrigerant pipe 10 is surrounded by the first heat insulating material 50 , and the outer circumferential surface of the second refrigerant pipe 20 is covered by the second heat insulating material 60 . Each of the first insulating material 50 and the second insulating material 60 is made of a soft foamed synthetic resin having excellent thermal insulation properties and an aluminum foil covering the surface thereof, respectively, as in the case of a conventional general insulating material.

The electric wire cable 30 is disposed on the outside of the first refrigerant tube 10 and the second refrigerant tube 20, and as a power supply and control cable, the electric wire and the communication line are integrated with a covering.

The protective pipe 40 is accommodated while surrounding the outside of the first insulating material 50 surrounding the first refrigerant pipe 10 and the second insulating material 60 surrounding the second refrigerant pipe 20 and the wire cable 30 . By doing so, they are safely protected from the action of external foreign substances or external forces. The protective tube 40 is a flexible corrugated tube made of PVC, also commonly referred to as a CD conduit.

On the other hand, the electric wire cable 30 is not wrapped by a separate insulating material, but is surrounded by the branching part 61 branched from the second insulating material 60 surrounding the second refrigerant pipe 20 . That is, the second heat insulating material 60 completely surrounds the second refrigerant pipe 20 and has a structure with a branching part 61, a part of which is branched like the shape of the number '6', and the branching part 61 ) will be wrapped around a large portion of the wire cable 30 in a contact state. In particular, since the first refrigerant pipe 10, the second refrigerant pipe 20, and the electric wire cable 30 are adjacent to each other, a portion of the first insulating material 50 that eventually surrounds the first refrigerant pipe 10 The electric wire cable 30 is surrounded by the main part and the branching part 61 of the second heat insulating material 60 surrounding the and the second refrigerant pipe 20 and comes into contact with each other. On the other hand, a portion of the outer peripheral surface of the electric wire cable 30 does not come into contact with the first insulating material 50 or the second insulating material 60 or the branching part 61 . For this reason, ventilation channels W1 and W2 through which air can pass are formed on the outer peripheral side of the wire cable 30 as shown in FIG. 3 .

In addition, the inside of the protective tube 40 is not filled with the first insulating material 50 and the second insulating material 60 as in the conventional case, but in contact with the outer peripheral surface of each of the first insulating material 50 and the second insulating material 60 . Ventilation passages (W3, W4) that allow air to pass through are formed in the parts that are not. Accordingly, since ventilation is made through these ventilation passages W1, W2, W3, and W4, it is possible to prevent an electric leakage accident due to dew condensation.

Moreover, since the first insulating material 50 and the second insulating material 60 are not filled in the inside of the protective tube 40 and a space is formed by the ventilation passages (W1, W2, W3, W4), the multi-layer of the present invention When constructing a pipe for a tube, the operator can easily move and handle the electric wire cable 30 , so that the work of removing or grounding the electric wire cable 30 can be easily performed. In addition, it is possible to perform the operation without damaging the wire cable 30 during this operation.

Next, as shown in FIG. 4 , the protective tube 40 is composed of a corrugated tube having a ridge 41 of a trapezoidal cross-sectional structure and a valley 42 of an arc-shaped cross-sectional structure. As such, when the peak 41 of the protective tube 40 has a trapezoidal cross-sectional structure, the compressive strength and restoring force to withstand external forces are increased compared to the conventional circular cross-sectional structure, thereby preventing or minimizing damage to the protective tube 40 . Moreover, while the peak 41 of the protective tube 40 has a trapezoidal cross-sectional structure, the shoulder portion of the peak 41 is made of a rounded rounding portion 41a, which is also damaged in the protective tube 40 compared to the angular shape. beneficial to prevention. In addition, as the valley portion 42 of the protective tube 40 has an arc-shaped cross-sectional structure, it is possible to prevent the first insulation material 50 or the second insulation material 60 coming into contact with the valley portion 42 from being torn. .

As shown in FIG. 4 , the first insulating material 50 and the second insulating material 60 have a filled state while the portion in contact with the inner circumferential surface of the protective tube 40 expands to the inner circumferential surface of the protective tube 40 . Accordingly, the first refrigerant pipe 10 and the second refrigerant pipe 20 and the electric wire cable 30 surrounded by the first insulating material 50 and the second insulating material 60 are the peaks ( 41) and by being held by the trough 42, it is possible to maintain a stably fixed state without flowing in the protective tube 40.

Next, an apparatus for forming a multi-tube protective tube for cooling and heating piping according to the present invention will be described with reference to FIGS. 5 to 9 . For reference, illustration of the protective tube 40 is omitted in the molding part 410 in FIGS. 5 and 6 .

First, the apparatus of the present invention is provided with a conventional extruder 100 for extruding a synthetic resin in a molten state for molding the protective pipe 40 of the multi-tube for cooling and heating piping. As a synthetic resin for molding the protective tube 40, for example, soft PVC (Polyvinyl Chloride) may be used, and the soft PVC is a synthetic resin with excellent durability and is suitable for use as a protective tube for protecting a refrigerant pipe or an electric wire cable.

The molded resin die 200 is connected to the extruder 100 . The molded resin die 200 includes a die body 210 forming an outer appearance, and a head portion that is coupled to the front end of the die body 210 and extrudes from the extruder 100 and discharges the synthetic resin introduced into the die body 210 . (220). The molded resin die 200 is provided with a resin flow path 201 through which synthetic resin in a molten state extruded from the extruder 100 flows in and flows, and the resin flow path 201 extends from the die body 210 to the head unit 220 . is connected Accordingly, the synthetic resin in the molten state introduced into the molded resin die 200 is cooled to some extent while flowing from the die body 210 to the head 220 along the resin flow path 201 to become a semi-molten state.

In the inside of the molded resin die 200, an insertion hole 202 penetrated in the front-rear direction along the molding direction of the multi-tube for cooling/heating piping is formed. The insertion hole 202 penetrates from the die body 210 to the head 220, and in the multi-tube for cooling and heating piping of the present invention, a multi-tube (T: a product wrapped by a first insulating material) excluding a protective tube. It has a cross-sectional diameter sufficient to allow passage of the first refrigerant pipe and the second refrigerant pipe wrapped by the second insulating material and the control wire cable).

A guide pipe 300 having a circular cross-sectional structure elongated along the formation direction of the insertion hole 202 is inserted into the insertion hole 202 . The guide pipe 300 is formed to be longer than the length in the front-rear direction of the insertion hole 202 . That is, when the guide pipe 300 is inserted into the insertion hole 202 , it is provided with a length that protrudes out of the front end and the rear end of the molded resin die 200 , respectively. In particular, it is preferable that the tip portion of the guide pipe 300 is extended and inserted to the beginning of the forming portion 410 of the forming block 400 to be described later. Accordingly, when the protective tube 40 is molded on the outer periphery of the multi-tube T, the multi-tube T is inserted into the guide pipe 300 and passes through the molded resin die 200, the guide pipe 300 ), when both ends of the molded resin die 200 protrude out of the front end and the rear end, it is easy to insert the multi-tube T into the guide pipe 300 and also the forming part 410 of the forming block 400 toward the side. can be guided precisely.

In addition, since the outer diameter of the guide pipe 300 is formed smaller than the inner peripheral diameter of the insertion hole 202 on the cross-sectional structure, the guide pipe 300 is inserted into the insertion hole 202 in a state of forming a thermal isolation layer. That is, when the guide pipe 300 is inserted into the insertion hole 202 , the remaining space of the insertion hole 202 exists on the outer periphery of the guide pipe 300 . The remaining space of the insertion hole 202 acts as a thermal insulating layer between the guide pipe 300 and the molded resin die 200, and this thermal insulating layer is the resin flow path 201 inside the molded resin die 200. Due to the high-temperature molten synthetic resin flowing along the guide pipe 300 and the multi-tube (T) passing through the inside, it is minimized or prevented from being deformed under the influence of heat.

The molding block 400 is disposed at the next position of the molding resin die 200 , that is, the next position of the head unit 220 , and the molding unit 410 is provided inside the molding block 400 . The molding unit 410 has a structure of a protective tube 40 to be formed. That is, as described above with respect to the multi-tube for cooling and heating piping, the protection pipe 40 is composed of a corrugated pipe having a peak 41 of a trapezoidal cross-sectional structure and a valley 42 of an arc-shaped cross-sectional structure, and the protection tube 40 The shoulder part of the mountain part 41 of the is made of a rounded part 41a, and in order to mold the structure of the protective tube 40, the molding part 410 has a trapezoidal cross-sectional structure and an arc shape. It is made in the shape of a corrugated tube having a trough of a cross-sectional structure, and has a rounded portion in which the shoulder portion of the ridge is rounded. Therefore, the multi-tube (T) passing through the inside of the guide pipe 300 passes through the forming part 410 of the forming block 400 and semi-melting through the resin flow path 201 of the head unit 220 . The synthetic resin (P) in the state is introduced into the molding unit 410 and passes, at this time, the synthetic resin is molded into the protective tube 40 from the outer periphery of the multi-tube (T).

A vacuum acting part 420 for applying a vacuum negative pressure to the molding part 410 is formed inside the molding block 400, and a fine slit communicating with the vacuum acting part 420 is formed in the molding part 410 ( 411) are formed. The vacuum acting part 420 is connected to an external vacuum pump (not shown) to apply vacuum negative pressure (vacuum suction force) provided from the vacuum pump to the molding part 410 through the slits 411 . Accordingly, when the protective tube 40 is molded in the molding part 410, the synthetic resin P in a semi-molten state introduced into the molding part 410 is adsorbed along the mountains and valleys of the molding part 410, thereby making it precise and standardized. Molding can be made with the protective tube 40 having the specified dimensions.

In addition, a cooling channel 430 for cooling the molding block 400 heated by the synthetic resin in a semi-molten state and the protective tube 40 to be molded is provided inside the molding block 400 . The cooling channel 430 is connected to an external cooling water supply unit (not shown) through the cooling water inlet 431 to introduce cooling water.

A coolant guide member 440 may be installed outside the forming block 400 . The cooling water guide member 440 induces the cooling water passing through the cooling channel 430 to be discharged toward the outer circumferential surface of the protection pipe 40 , thereby effectively cooling the protection pipe 40 that has been molded.

A resin inflow guide 450 is installed at the inlet portion into which the synthetic resin in the semi-molten state is introduced in the molding block 400 . The resin inflow guide 450 has a 'C'-shaped cross-sectional structure and can be bolted to the molding block 400 side, and is in a semi-molten state flowing out from the head unit 220 in a portion opposite to the head unit 220 . It is penetrated so that the synthetic resin (P) can be introduced. The resin inflow guide 450 may be made of a material such as stainless steel (SUS) or Teflon, which is known to have excellent chemical resistance, heat resistance, abrasion resistance, stain resistance, etc., and in particular, a very low coefficient of friction. has a Therefore, the resin inflow guide 450 reduces the coefficient of friction and thermal conductivity between the molding block 400 and the synthetic resin (P) when the synthetic resin in the semi-molten state is introduced into the molding block 400 side, thereby reducing the synthetic resin in the semi-molten state ( P) is allowed to smoothly flow into the forming part 410 . Furthermore, the resin inlet guide 450 also serves to prevent the vacuum negative pressure from leaking toward the inlet side into which the synthetic resin (P) is introduced when the vacuum negative pressure acts on the molding part 410 .

Next, an air supply unit 500 for injecting air into the guide pipe 300 is provided. The air supply unit 500 includes an air guide member 510 coupled to one end of the die body 210 in which the multi-tube T is introduced to the molded resin die 200 side through the guide pipe 300, and It includes an air supply pipe 520 connected to the air guide member 510 and an air tank 530 for supplying air to the air supply pipe 520 . In addition, an air hole 310 is formed in a portion located inside the air guide member 510 in the guide pipe 300 , and the air hole 310 is connected to the air supply pipe 520 in the air guide member 510 . ) and an air flow path 511 communicating with it is formed. Accordingly, the air supplied from the air supply unit 500 to the inside of the guide pipe 300 through the air hole 310 is a multi-tube (T) in order to form a protective tube (40) on the outer peripheral side of the multi-tube (T). ) is introduced into the guide pipe 300 to cool the multi-tube (T) when it passes through. In addition, the air supplied into the guide pipe 300 expands the first insulating material 50 and the second insulating material 60 of the multi-tube (T), which causes the multi-tube ( The first insulating material 50 and the second insulating material 60 of T) are filled in the inner circumferential surface of the protective tube 40 to be molded in the forming part 410 . Therefore, as shown in FIG. 4 , the first refrigerant pipe 10 and the second refrigerant pipe 20 and the electric wire cable wrapped by the first insulating material 50 and the second insulating material 60 are the mountain part of the protection pipe 40 . By being held by the (41) and the trough (42), it is possible to maintain a stably fixed state without flowing in the protective tube (40).

In particular, as shown in FIG. 7 , the air hole 310 is preferably formed in a shape inclined in a direction through which the multi-tube T passes (eg, a shape inclined at an angle of 45° downward to the right). In addition, as shown in FIG. 8 , a plurality of air holes 310 are formed radially, and six air holes 310 may be formed at intervals of 60°. This structure of the air hole 310 increases the cooling effect of the multi-tube T by allowing the air to proceed at a smooth speed in the forming direction of the protective tube 40 without stagnating inside the guide pipe 300, The first insulating material 50 and the second insulating material 60 of the multi-tube (T) are sufficiently expanded.

Meanwhile, a guide pipe support member 600 for preventing the flow of the guide pipe 300 may be installed in the molded resin die 200 . The guide pipe support member 600 may be respectively installed on the front end side and the rear end side of the die body 210 in the molded resin die 200 . In particular, as shown in FIG. 9 , the guide pipe support member 600 has a structure having a circular ring portion 610 and a protrusion 620 protruding outward from the ring portion 610 . Accordingly, the ring portion 610 surrounds and supports the outer circumferential surface of the guide pipe 300 , and the protrusion 620 is in close contact with the inner wall of the die body 210 to prevent the guide pipe 300 from flowing.

Next, a rotating body 700 for rotating the forming part 410 is installed on the forming block 400 side. In addition, a driving unit 800 such as an electric motor for rotationally driving the rotating body 700 is provided, and the rotating body 700 includes a chain gear 82 and a chain 830 provided on the driving shaft 810 of the driving unit 800 . ) is connected to The rotating body 700 is connected to the forming part 410 while extending from the inside to the outside of the forming block 400 . The connection method may be made by friction contact or a separate fastening means. In addition, the portion located inside the forming block 400 of the rotating body 700 is supported by the bearing 710 , so that the rotating body 700 can rotate without resistance. Due to this configuration, when the rotating body 700 is rotationally driven by the driving force of the driving unit 800 when the protective tube 40 is molded, the molding unit 410 is rotated, so that the synthetic resin introduced into the molding unit 410 is molded. While uniformly spreading throughout the inner wall of the portion 410, the protective tube 40 having a spiral corrugated tube structure is smoothly formed.

In the above, the present invention has been described based on the preferred embodiment, but the present invention is not limited to the above embodiment, and various modifications can be made by those skilled in the art within the scope of the technical spirit of the present invention. This is possible.

10: first refrigerant pipe 20: second refrigerant pipe
30: wire cable 40: protective tube
41: obstetric 42: bone
50: first insulation material 60: second insulation material
61: branch 100: extruder
200: molded resin die 201: resin flow path
202: insertion hole 210: die body
220: head 300: guide pipe
310: air hole 400: forming block
410: molding part 411: slit
420: vacuum working part 430: cooling channel
431: cooling water inlet 440: cooling water guide member
450: resin inflow guide 500: air supply unit
510: air guide member 511: air flow path
520: air supply pipe 530: air tank
600: guide pipe support member 610: ring part
620: protrusion 700: rotating body
710: bearing 800: driving part
810: rotation shaft 820: chain gear
830: Chain P: Synthetic resin
T: Multi-tube W1,W2,W3,W4: Ventilation flow path

Claims (8)

A molded resin die having a resin flow path through which the synthetic resin in a molten state extruded from the extruder flows in, and having an insertion hole penetrating along the protective pipe molding direction of the multi-tube for cooling and heating piping, and the first inserted into the insertion hole A guide pipe through which a multi-tube composed of a refrigerant pipe, a second refrigerant pipe, and a control wire cable passes, and the multi-tube passing through the guide pipe passes, and the synthetic resin through the resin flow path flows through the passage A molding block having a molding part to be molded into the protective tube on the outer peripheral side of the multi-tube, and an air supply part for supplying air to the inside of the guide pipe to cool the multi-tube passing through the guide pipe. In the protective pipe forming apparatus for multi-tube for cooling and heating piping,
The guide pipe is inserted in a state of forming a thermal isolation layer in the insertion hole of the molded resin die,
The first refrigerant pipe is surrounded by a first insulating material and the second refrigerant pipe is configured to be surrounded by a second insulating material,
The protective tube forming apparatus for a multi-tube for cooling and heating piping, characterized in that the inner peripheral surface of the protective pipe molded in the forming part is filled while the first and second insulating materials are expanded by the air supplied from the air supply part.
According to claim 1,
The guide pipe is provided with an air hole through which the air supplied from the air supply unit is introduced, wherein the air hole is formed in a shape inclined in a direction in which the multi-tube passes, and a plurality of the air holes are formed radially. Multi-tube protection pipe forming device for heating piping.
delete According to claim 1,
The front end of the guide pipe is a multi-tube protective tube forming apparatus for cooling and heating piping, characterized in that it extends to the beginning of the forming part and is inserted.
delete delete delete delete

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