KR100718935B1 - Firing resin authorizaton the plastics multilayer tube which is had all - Google Patents

Abstract

The present invention relates to a synthetic resin multi-layer pipe manufacturing apparatus equipped with a foamed resin material, the purpose of which is the screw-shaped strength is formed, the foamed resin material is provided in the interior of the multilayer tube is excellent in heat insulation efficiency and strength, the inner wall thickness compared to the outer wall It is possible to extend the life of the tube even more by forming a thicker, multi-layered structure in which a plurality of foam resin material provided in the inside of the tube is laminated, so that the buckling of the force is not generated even during the extrusion of a large diameter tube The present invention provides a synthetic resin multilayer tube manufacturing apparatus equipped with a foamed resin material.

The present invention is a multi-layered tube in which a screw-type force is formed and a foamed resin layer is formed using the first, second and third extruders separately installed to supply different melt resins, and the molten resin supplied from the first and second extruders. The apparatus for manufacturing a synthetic resin multilayer tube and the apparatus comprising a die for extrusion molding, a vacuum sizing for cooling and solidifying the multilayer tube extruded from the die, and a driving means for rotating the rotating shaft provided in the die. The technical gist of the multi-layered synthetic resin pipe that is extruded by using the above is a technical subject.

Multi-layer pipe, foamed resin material, through hole, strength bar, outer wall, inner wall, auxiliary strength bar, through-molded part, foam resin inlet groove

Description

Filing resin authorizaton the plastics multilayer tube which is had all}

1 is a schematic diagram showing the overall configuration of a multi-layer pipe manufacturing apparatus according to the present invention,

2 is a cross-sectional view showing the configuration of a die according to the present invention;

3 is a perspective view schematically showing a rotational molding member according to the present invention;

Figure 4a, 4b, 4c is a front view showing the shape of the inner dice according to the present invention,

5 is a cross-sectional view showing the configuration of a vacuum sizing according to the present invention;

6 is a cutaway perspective view showing the shape of a multi-layer tube with a foamed resin material according to the present invention,

7 is a cross-sectional view showing the shape of a multi-layer tube with foamed resin material according to the present invention,

8 is a cross-sectional view showing the shape of the cross section of the multi-layer tube with a foamed resin material according to the present invention,

<Description of the symbols for the main parts of the drawings>

10a: first extruder 10b: second extruder

10c: 3rd extruder 20: dies

21. Main body 22: First resin supply part

(23): second resin supply unit (24): third resin supply unit

25: Euro 1 (26): Euro 2

(27): third euro (28): inner dice

28a: groove 28b: projection

(29): outer dice (30): rotating shaft

40: rotational molding member 41: through-molding part

(42): resin inlet groove (43): body part

(44): strength forming part

(50): vacuum sizing (51): air intake

(52): water spray nozzle (53): passage

60: drive means 70: multilayer tube

(71): inner wall (72): outer wall

(73): Aeration (74): Strength

(75): auxiliary meat (76): foamed resin

80: blower 81: supply pipe

The present invention relates to a synthetic resin multi-layer pipe manufacturing apparatus equipped with a foamed resin material, and more particularly, by injecting the foamed resin material in the through-hole formed by a plurality of screw-type force to improve the thermal insulation and rigidity, the inner wall thickness of the tube It relates to a synthetic resin multi-layer pipe manufacturing apparatus having a foamed resin material is formed thicker than the outer wall.

Synthetic resin multi-layer pipes generally used are made of synthetic resin circular pipes that are extruded for use in sewage pipes, drain pipes, and electrical / communication lines. It means what was formed.

On the other hand, as a manufacturing method of such a synthetic resin multilayer tube, a long cylindrical tube is extruded into a small square tube by using a soft PE material, which is usually wound in a spiral shape, and the molten resin is injected therebetween while spirally winding the square tube. Will be produced.

In order to manufacture a multilayer tube in the above manner, as the production process and a lot of material input are inevitable, the productivity is lowered and the production cost is increased. Due to the melted resin injected into the space, the surface of the tube is uneven, which is not good in appearance, and when long-term use is used, cracks are generated at the joints into which the molten resin is injected. .

In addition, as the multi-layer tube is molded by using a single material by an extrusion molding apparatus, the inner wall and outer wall of the tube are molded with the same material, so that the use of expensive raw materials to make the inner wall of the tube have higher strength is required. If required, a problem arises that the outer wall also has to use expensive raw materials, thereby increasing the cost of the tube.

In addition, since the multilayer tube is a multilayer tube having circularly arranged through holes in the circumferential direction of the tube, the height of the through hole is also increased in the case of a large diameter tube, so that the strength of the inner wall and the outer wall is buckled during extrusion. The problem which caused the defect was created.

The present invention has been made in consideration of the conventional problems as described above, the purpose of which is the screw-shaped force is formed, the foamed resin material is provided in the interior of the multi-layer tube is excellent in thermal insulation efficiency and strength, more than the outer wall thickness than the outer wall It can be formed thicker to extend the life of the tube even more. It is a multilayered structure in which a plurality of foamed resin materials provided in the tube are laminated, and the foamed resin which does not cause force buckling even when extrusion of a large diameter tube is formed. The present invention provides a synthetic resin multilayer tube manufacturing apparatus equipped with ash.

The present invention to achieve the object as described above and to perform the problem for eliminating the conventional defects are the inner wall; An outer wall disposed at a predetermined distance from the inner wall to form a concentric circle with the inner wall; A plurality of through holes connecting the inner wall and the outer wall and formed by a plurality of force bars that are continuous in a screw shape with respect to the longitudinal direction of the tube formed of the inner wall and the outer wall, and have equal spacing therebetween; And a foamed resin material provided in at least one or more of the through holes.

In addition, the foamed resin material, characterized in that uniformly provided in the plurality of through holes.

In addition, the inner wall is characterized in that it is formed to have a thickness thicker than the thickness of the outer wall.

In addition, the multi-layer pipe is a synthetic resin multi-layer pipe provided with a foamed resin material, characterized in that it further comprises an auxiliary force protruding into the inside of the multi-layer pipe in the lower portion of the force, and formed in the same screw shape as the force.

On the other hand, the present invention is the first, second, third extruders having separate tanks, and the first, second, third extruders are connected to the first, second, third extruders are supplied with a molten resin and rotated therein is provided with a multi-layer pipe It comprises a die for extruding and a driving means for generating a driving force for rotating the rotary molding member and the vacuum sizing for solidifying the multi-layer tube, the die is connected to the drive means of the hollow type installed in the die body to rotate Inner / outer side forming a rotating shaft, a rotating molding member fixed to the end of the rotating shaft to rotate together with the rotating shaft, and an inner and outer surface of the multilayer tube installed and extruded so as to be positioned inside and outside of the rotating molding member, respectively. A first, second, and third resin supply parts connected to a die, the first, second, and third extruders, respectively, and installed in a main body to receive molten resin; In the synthetic resin multilayer pipe manufacturing apparatus comprising a first 1,2,3 flow paths formed in the main body so as to deliver the molten resin supplied from each other to the different parts of the rotational molding member,

The rotational molding member has a body portion installed to be detachable at one end of the rotating shaft installed to penetrate the main body of the die, and extending from the body portion, the circular arrangement to correspond to a plurality of through-holes formed in the multilayer tube A plurality of through-molded parts formed into a structure; And a force forming portion formed between the through molding parts to allow the molten resin of the first flow path and the second flow path to be mixed with each other to form a force bar, and to penetrate through the inside of the through molding part. It is characterized by consisting of a resin material inlet groove for supplying the molten resin moved through the through hole to form an intermediate layer.

In addition, the through-molded portion of the rotational molding member is characterized in that the inner wall of the multi-layer tube to be extruded is formed closer to the outer die so as to be formed thicker than the outer wall.

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

1 is a schematic view showing the overall configuration of a multi-layer pipe manufacturing apparatus according to the present invention, Figure 2 is a cross-sectional view showing the configuration of the die according to the present invention, Figure 3 is a perspective view schematically showing a rotational molding member according to the present invention, 4a, 4b, 4c is a front view showing the shape of the inner die according to the present invention, Figure 5 is a cross-sectional view showing the configuration of the vacuum sizing according to the present invention, Figure 6 is a shape of a multi-layer tube with a foamed resin material according to the present invention 7 is a cross-sectional view showing the shape of a multi-layer tube with a foamed resin material according to the present invention, Figure 8 is a cross-sectional view showing the shape of the cross-section of a multi-layer tube with a foamed resin material according to the present invention,

Apparatus for manufacturing a multi-layer tube according to the present invention is a molten resin supplied from the first 1,2,3 extruders (10a, 10b, 10c), and the first 1,2,3 extruders (10a, 10b, 10c) as shown in FIG. The die 20 for extruding the multi-layer tube formed with the screw-type force meat, and the vacuum sizing 50 for cooling and solidifying the multi-layer tube extruded from the die 20, and the inside of the die 20 It consists of a drive means 60 for rotating the provided rotary shaft.

In the drawings, reference numeral 90 denotes a cooler, 100 a drawer, 110 a printer, and 120 a cutting machine.

The first, second and third extruders 10a, 10b, and 10c are formed to have separate tanks so as to accommodate raw materials of different materials, that is, different melt resins.

The die 20 is connected to the first, second, third extruders 10a, 10b, 10c as shown in Figure 2 is provided with a first, second, third resin supply unit 22, 23, 24 to receive the molten resin And a rotational molding member 40 for forming a screw-shaped multi-layer tube using melt resins supplied from the first, second, third resin supply parts 22, 23, and 24, and the rotational molding member 40 Inner and outer dies (28,29) are provided to form the inner and outer surfaces of the multi-layer tube is installed and positioned so as to be located inside and outside of each of the), and drive means (60) for forcibly rotating the rotomolding member (40) The rotating shaft 30 which rotates by () is comprised.

Meanwhile, the first, second and third resin supply parts 22, 23, and 24 are installed at predetermined positions of the die body 21, and the first resin supply part 22 is provided with the first extruder 10a. Connected to receive the molten resin, the second resin supply unit 23 is connected to the second extruder 10b to receive the molten resin, and the third resin supply unit 24 is connected to the third extruder 10c While the molten resin is configured to be supplied, the molten resin supplied to the first, second and third resin supply parts 22, 23, and 24 is configured to be transferred to the rotomolding member 40 through different flow paths.

The rotational molding member 40 extends from the body portion 43 and the body portion 43 installed to be detachable at one end of the rotation shaft 30 installed to penetrate the body 21 of the die 20. And corresponding to the plurality of through holes 73 formed in the multilayer pipe, and formed between the plurality of through parts 41 and the through parts 41 formed in a circular array structure to form the first passage ( 25 and the molten resin of the second flow passage 26 are mixed with each other to form a force flesh 74, and the third flow passage 27 is formed inside the through-molding portion 41. It is composed of a resin material inlet groove 42 is supplied to the molten resin is moved through the through) to supply the molten resin into the interior of the through hole formed by the through-molded part 41 to form an intermediate layer.

That is, the through-molded portion 41 is formed so that the through-hole formed in the through-molded portion 41 and at the same time to form the through-hole 73 formed by the force of the multi-layer tube 74 and the force (74). The molten resin of the third flow path 27 is supplied through the 42 to be injected into the through hole 73 to form an intermediate layer of the multilayer pipe 70.

In addition, the rotational molding member 40 is configured to be forcibly rotated by the rotation of the rotary shaft 30, wherein the other end of the rotary shaft 30 is connected to the drive means 60 is generated by the drive means 60 It is configured to rotate by using power. Here, although the driving means 60 is not shown in detail, a conventional motor may be used, and the motor and the rotating shaft may be connected by a belt or a chain to rotate the rotating shaft by a motor at a constant speed. have.

That is, the molten resin supplied to the first resin supply part 22 is supplied to the rotomolding member 40 through the first flow path 25 formed in the main body 21, where the first flow path 25 is rotated. The molten resin supplied from the first extruder 10 forms an outer wall 72 portion of the multilayer pipe 70 by forming the molten resin close to the outer end of the molding member 40, that is, the outer die 29. It is configured to.

In addition, the molten resin supplied to the second resin supply unit 23 is supplied to the rotomolding member 40 through the second flow passage 26 formed in the main body 21, where the second flow passage 26 is The molten resin supplied from the second extruder 10b is formed to supply the molten resin to the inner end of the rotational molding member 40, that is, the inner die 28. It is configured to form.

In addition, the molten resin supplied to the third resin supply unit 24 is supplied to the rotomolding member 40 through the third flow path 27 formed in the main body 21, the supplied molten resin is rotomolded The formed through hole is supplied through the resin material inflow groove 42 in the through molding part 41 of the member 40 to form the through hole 73 between the first and second flow paths 25 and 26. Inject the molten resin into 73).

That is, the third flow path 27 is formed to supply the molten resin into the resin material inflow groove 42 inside the through-molded part 41 between the first and second flow paths 25 and 26, thereby allowing the third extruder 10c to be used. The molten resin supplied from) is configured to form a portion of the foamed resin material 76 which is an intermediate layer of the multilayer tube 70.

In addition, the molten resin supplied to the first resin supply part 22 and the molten resin supplied to the second resin supply part 23 flow into the force forming part 44 which is a space between the through-molding part 41 of the circular array structure. As it is lowered and mixed with each other, force 74 is formed.

In addition, as the shape of the through-molded part 41 and the resin material inlet groove 42 is changed into various shapes of polygons, the shape of the intermediate layer and the force of the multilayer pipe is changed.

For example, when the cross-sectional shape of the through-molded part 41 is configured in the form of a triangle, the force of the multilayer tube is configured to be formed to be inclined at a predetermined angle in the opposite direction to the adjacent force in the intermediate layer, and formed by force. The foamed resin material is inserted into the through hole.

As described above, by using different molten resins supplied from the first, second, and third extruders 10a, 10b, and 10c, respectively, a multilayer tube having a different material and color of the inner wall, the outer wall, and the intermediate layer may be manufactured. 3 Extruder (10a, 10b, 10c) of the extruder required for the production of a multi-layer pipe can be selected and used, and by increasing the amount of melt supplied from a specific extruder, the pipe portion made of a molten resin supplied from a specific extruder is thicker It is possible to manufacture a multilayer tube with a thickness.

On the other hand, the inside of the hollow rotary shaft 30 can cool the multi-layer tube 70 is supplied by the air for cooling through the blower 80 and the supply pipe 81 from one side of the rotary shaft 30 to extrude.

Here, the through-molded part 41 is located closer to the outer die 29 to be described later so that the inner wall 71 of the multilayer pipe 70 to be extruded can have a thicker thickness than the outer wall 72. can do.

On the other hand, the inner and outer dies 28 and 29 for forming the inner and outer surfaces of the multi-layer tube to be extruded are installed on the inner and outer sides of the rotomolding member 40, wherein the outer die 29 is a die body 21 The inner die 28 is fixed to the rotational molding member 40 and configured to rotate together with the rotational molding member 40.

In addition, a plurality of grooves 28a are formed on the outer circumferential surface of the inner die 28 to form the auxiliary force 75, which is formed in a screw shape, inside the multilayer pipe 70 as shown in FIG. 4A. 28a) is formed between the through-molding portion 41 of the rotational molding member 40, the auxiliary force 75 extending from the force 74 of the multi-layer tube 70 protrudes into the inner surface of the multi-layer tube is a multi-layer tube Extruded together with the inside of the multi-layer tube is made of a multi-layer tube formed with a plurality of subsidiary teeth 75 protruding in the form of a screw.

As described above, the auxiliary force 75 protruding into the multilayer tube allows vortices to be generated in the fluid flowing through the inside of the tube, thereby generating oxygen bubbles in the fluid, so that the water purification effect can be expected.

On the other hand, the groove 28a formed on the outer circumferential surface of the inner die 28, as shown in Figure 4b may be formed at the lower end of the through-molded portion 41, not between the through-molded portion 41, which is formed The groove 28a is a hole 73 to prevent the portion of the force 74 from protruding into the inside of the tube due to the difference in shrinkage between the through hole 73 and the force 74 of the multi-layer tube, so that the inner surface of the tube is uneven. By supplying the molten resin corresponding to the difference in the amount of shrinkage of the force and the 74 to the through hole portion 73, it is possible to manufacture a multilayer tube having a smooth inner surface.

In addition, a plurality of protrusions 28b may be formed on the outer circumferential surface of the inner die 28 as shown in FIG. 4C to manufacture a multilayer tube having a smooth inner surface, wherein the protrusions 28b are through holes of the rotomolding member 40. It is formed to be located between the forming portion 41, the production of a multi-layer tube having a smooth inner surface by supplying a molten resin to the portion of the force meat 74 corresponding to the difference in the shrinkage of the through hole 73 and the force meat 74 less This becomes possible.

By adjusting the position of the groove 28a formed on the outer circumferential surface of the inner die 28 as described above, it is possible to manufacture a multilayer tube having the auxiliary tenders 75, or to selectively manufacture a multilayer tube having a smooth inner surface. .

The vacuum sizing 50 has a passage 53 through which the multi-layer tube is formed to decrease in diameter from the inlet side to the outlet side as shown in FIG. 5, and passes through the passage 53, and passes through the passage 53. A plurality of vacuum suction ports 51 are provided along the circumferential circumference of the passage 53 so as to smoothly form the outer surface of the circumference. Is configured to be formed smoothly without, the water spray nozzle 52 for injecting water to the surface of the multi-layer tube 70 to increase the adsorption force by the vacuum suction port 51, and to cool the multi-layer tube is a passage ( 53) is provided along the circumference of the circumference.

By spraying water on the outer surface of the multi-layer tube 70 introduced into the vacuum sizing 50 as described above, the suction force of the vacuum suction port 51 is formed by forming a film filling the gap between the vacuum suction port 51 and the multi-layer tube 70. You can raise it higher.

On the other hand, the water sprayed by the water spray nozzle 52 is preferably lukewarm water having a temperature range of approximately 30 ~ 55 ℃ is used to prevent the deformation of the multilayer tube due to a sudden temperature change.

The multilayer pipe 70 of the present invention manufactured by the extrusion apparatus configured as described above has an inner wall 71 and an outer wall disposed at a predetermined distance from the inner wall 71 to form concentric circles with the inner wall 71 ( 72, and the inner wall 71 and the outer wall 72, a plurality of screws having a constant equal interval and continuous in the form of a screw with respect to the longitudinal direction of the tube consisting of the inner wall 71 and the outer wall (72) It comprises a force 74, a plurality of through holes 73 formed by the force 74, and a foamed resin material 76 provided in at least one or more of the through holes 73 of the through holes 73. .

Meanwhile, the multilayer pipe 70 has an inner wall 71 having a thicker thickness than the outer wall 72, and the resin material injected into the inner wall 71, the outer wall 72, and the through hole 73 is supplied to the extruder. Depending on the molten resin is to be formed of different materials or colors.

At this time, by injecting the foamed resin material 76 into the through hole 73 is formed a multi-layer tube 70 having a foam layer formed in the intermediate layer.

On the other hand, the multi-layer pipe 70 is configured to have an auxiliary force flesh 75 is formed on the inner surface or to have a smooth inner surface according to the shape of the die 20 during extrusion.

In the extrusion molding of the multi-layer tube 70 as described above, the molten resin of different materials may be added to a plurality of extruders to form the outer wall and the inner wall of the multi-layer tube to have different properties or different colors. The outer wall 72 and the strength 74 of the pipe that are not generated are made of low-cost recycled resin, and the inner wall 71 of the pipe, which is highly abrasion-produced, is made of synthetic resin having excellent abrasion resistance. The multilayer tube 70 can be manufactured.

On the other hand, the multilayer tube 70 is provided with a foam resin material 76 through the tubular molding portion 41 to the through-holes 73 formed by a plurality of force ribs 74 so that the force ribs 74 are not buckled. do.

As described above, by increasing the thickness of the pipe wall thickened by the foamed resin material 76 to the large pipe to prevent the phenomenon that the strength of the 74 increases in the molding of the multilayer tube (70).

In addition, the multi-layer pipe 70 may adjust the rotation angle of the screw-type force 74 and the auxiliary force 75 according to the rotational speed of the drive means of the extrusion device.

The multilayer pipe 70 configured as described above may be used for various purposes such as water / sewage pipes, gas pipes, and electrical wiring pipes, and the foamed resin material 76 serves as a protective wall to protect the multilayer pipe, thereby making it more durable. The pipe can be provided, and the insulation effect is also excellent.

The present invention is not limited to the above-described specific preferred embodiments, and various modifications can be made by any person having ordinary skill in the art without departing from the gist of the present invention claimed in the claims. Of course, such changes will fall within the scope of the claims.

As described above, the present invention is provided with a foamed resin material inside the multilayer tube, so that the insulation and strength of the tube are excellent, and the inner wall is formed to have a thicker thickness than the outer wall, while the inner and outer walls have different materials and colors. It can be molded to have a low cost and it is possible to manufacture a sewage pipe having better properties at a lower cost, and to prevent buckling of the force generated during the molding of large diameter pipe by the through hole and the foamed resin material provided in the through hole. At the same time, the strength of the multilayer tube can be further improved.

Claims (6)

delete delete delete delete First, second and third extruders having separate tanks, and rotary molding members are connected to the first, second and third extruders to receive molten resin and rotate therein to extrude the multilayer tube. A die, and a vacuum driving means for solidifying the multilayer tube and driving means for generating a driving force for rotating the rotatable member. The die is connected to the driving means and the hollow rotating shaft installed in the die body, the rotating molding member fixed to the end of the rotating shaft is rotated together with the rotating shaft, and inside and outside of the rotating molding member, respectively An inner / outer die which is formed to be positioned to form an inner and outer surface of the multilayer tube to be extruded, and a first and second resin supply unit installed in the main body so as to be connected to the first and second extruders and the first and third extruders respectively to receive molten resin; In the synthetic resin multilayer pipe manufacturing apparatus consisting of the first, second, third flow paths formed in the main body so as to transfer the molten resin supplied from the first, second, third resin supply unit to different parts of the rotational molding member, The rotational molding member is a body portion which is installed to be detachable to one side end of the rotating shaft installed to penetrate the body of the die; A plurality of through-molded parts extending from the body part and arranged in a circle so as to correspond to a plurality of through-holes formed in the multilayer pipe to form a force-forming part; Is formed to penetrate through the through-molded portion, the synthetic resin multi-layer pipe with a foam resin material characterized in that consisting of a resin material inlet groove for supplying the molten resin moved through the third passage into the through hole to form an intermediate layer Manufacturing equipment. The method of claim 5, The through-molded part of the rotational molding member is a synthetic resin multi-layer pipe manufacturing apparatus having a foamed resin material, characterized in that the inner wall of the extruded multi-layer pipe is formed closer to the outer die so as to be formed thicker than the outer wall.

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