KR102003699B1 - Apparatus for producing triple tube using waste plastics and foaming agent - Google Patents

Abstract

The present invention relates to an apparatus for producing a filling pipe using waste plastic and a foaming agent. An object of the present invention is to provide an apparatus for producing a filling pipe using waste plastic and a foaming agent, in which a core material made of waste plastic is surrounded by an outer layer made of a renewable synthetic resin, wherein coupling of the core material with the outer layer is further strengthened. To this end, the apparatus for producing a filling pipe using waste plastic and a foaming agent comprises: an extruding unit including a first extruder configured to supply waste plastic, a foaming agent inlet configured to supply a foaming agent, a second extruder configured to supply a renewable synthetic resin, and an extruding mold connected to the first extruder, the foaming agent inlet, and the second extruder and configured to extrude and mold a profile; a sizing unit configured to induce the profile to have a desired shape and size; a cooling unit configured to cool the profile; and a pipe molding unit configured to mold the profile into a pipe shape by winding the profile in a spiral structure. The extruding mold comprises: a mold main body having a first inlet, a second inlet, and an atmospheric chamber; a center die coupled to the mold main body to pass through a center portion of the atmospheric chamber and having a protruding member protruding from a front end portion; and an external die configured to form a first extrusion path to mold a core material with the center die, a second extrusion path to mold an outer layer on an outer side of the first extrusion path, and having a third inlet connected to the second extruder and configured to supply the renewable synthetic resin to the second extrusion path.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an apparatus for producing a filling tube using waste plastics and a foaming agent,

The present invention relates to a filling tube manufacturing apparatus, and more particularly, to a filling tube manufacturing apparatus comprising an inner layer formed by using a synthetic resin such as high-density polyethylene and an intermediate layer formed by using waste plastic between outer layers, And more particularly, to a filling tube manufacturing apparatus using waste plastics and a foaming agent capable of manufacturing a high quality synthetic resin pipe by reinforcing the bonding force of the outer layer.

Generally, sewage pipes, water pipes, sewage pipes, waste water pipes buried underground are buried underground and have relatively high ductility and relatively high strength, durability, chemical resistance, and water resistance A synthetic resin tube made of a synthetic resin such as polyethylene (PE) or polyvinyl chloride (PVC) is widely used.

On the other hand, the synthetic resin pipe can be used semi-permanently because it is not rusted or corroded by corrosive substances present in the soil. Therefore, the synthetic resin pipe can be used in various industrial fields such as an agricultural water pipe buried in the ground, sewage water, sewage pipe, It is widely used in everyday life.

In manufacturing such a synthetic resin pipe, conventionally, a middle or large-sized synthetic resin pipe is manufactured by spirally winding an outgoing profile which is continuously extruded while having a predetermined cross-sectional shape.

FIG. 1 is an exemplary view showing a structure of a conventional apparatus for manufacturing a middle- or large-sized synthetic resin tube, and FIG. 2 is a sectional view of a profile used for manufacturing a middle- or large-sized synthetic resin tube.

The conventional apparatus for producing a synthetic resin pipe comprises an extruder 10 for extruding molten resin to form a profile, a cooler 20 for guiding the profile extruded from the extruder 10 to have a desired shape and size, And a molding machine (30) for manufacturing a synthetic resin pipe by winding a spiral profile of the metal pipe (20).

On the other hand, the profile used for the production of the synthetic resin pipe has a hollow structure, and by making the synthetic pipe using the hollow profile, it is possible to reduce the weight of the synthetic resin pipe and the material required for manufacturing the synthetic pipe .

However, in the case of a synthetic resin pipe made of a profile having a hollow cross-section, a void is formed in the wall forming the synthetic resin pipe, and the risk of leakage increases due to the empty space.

On the other hand, Patent Document 1 discloses a synthetic resin pipe made of a waste plastic raw material and having a built-in profile formed of an outer layer formed in such a manner that the recycled core material surrounds the recycled core material.

Such a synthetic resin pipe has the advantage that there is no danger of leakage due to the empty space inside the profile as the inside of the profile is entrained by the recycled core material, and the strength of the synthetic resin pipe is also improved.

However, due to the different physical properties of the recycled core material made of the waste plastic material and the outer layer made of the new synthetic resin, the bonding strength between the recycled core and the sheath layer is low. As a result, the recycled core and the outer layer are separated There is a problem that the strength of the synthetic resin pipe is lowered and the risk of leakage is increased.

Patent Registration No. 10-0954781 (issued on April 28, 2010)

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and it is an object of the present invention to provide a fill tube by spirally winding a core material formed of waste plastics into a profile formed by wrapping an outer layer formed of a synthetic resin, And a method of manufacturing a filling tube using waste plastic and a foaming agent in which a concavo-convex structure is formed between the core layer and the outer layer to further strengthen bonding between the core and the outer layer.

In order to achieve the above object and to achieve the object of eliminating the drawbacks of the prior art, the present invention provides a blow molding machine comprising a first extruder for melting and supplying waste plastics, a blowing agent dispenser for supplying a foaming agent, A second extruder connected to the first extruder, the blowing agent injector and the second extruder, continuously extruding the waste plastics, the foaming agent, and the new synthetic resin to extrude a core material made of waste plastic by wrapping an outer layer made of a synthetic resin An extruding portion made of an extrusion die; A sizing unit for inducing the profile to have a desired shape and size through vacuum adsorption of the surface of the profile extruded and molded from the extruding unit; A cooling unit for cooling the profile coming out of the sizing unit; And an inertia formed by winding the profile past the cooling unit in a spiral structure on the outside of the drum to form a tube shape, wherein the extrusion die has a first inlet connected to the first extruder, A mold body having a second inlet connected to the injector, and a standby chamber in which the waste plastic introduced through the first and second inlets and the foaming agent are temporarily stored; A center die coupled to the mold body so as to have a structure passing through the center of the atmospheric chamber and having a protruding member formed at the distal end thereof to form an expansion space inside the core when the core is extruded; And a second extruder for forming a core layer and a first extruder for forming a core material while forming a core die and forming a second extruder for forming an outer layer outside the first extruder, And a third inlet connected to the second extrusion furnace to supply the new synthetic resin to the second extrusion furnace, wherein the core and the outer layer including the foaming agent are simultaneously extruded from one extrusion die. A filling tube manufacturing apparatus using waste plastics and a foaming agent is provided.

Meanwhile, in the apparatus for manufacturing a filling tube using the waste plastic and the foaming agent, the extruder further includes a dryer for drying the waste plastic and supplying the waste plastic to the first extruder, wherein the dryer is configured to store waste plastic pellets; An agitator for agitating the waste plastic pellets in the vessel, the agitator comprising a rotating screw disposed inside the vessel; And a hot air blower for injecting heated air into the container to induce drying of the waste plastic pellets.

In the meantime, an apparatus for manufacturing a filling tube using waste plastics and a foaming agent, the apparatus comprising: an air inflow path formed so as to penetrate the center die in the longitudinal direction to introduce outside air into the inside of the core; And a dry air supply device connected to the air inflow path and supplying dry air from which water vapor has been removed to an air inflow path.

In the apparatus for manufacturing a filling tube using waste plastics and a foaming agent, the center die may be a cylinder-shaped body having a structure penetrating through the atmospheric chamber and having an outer circumferential surface spaced apart from the inner circumferential surface of the atmospheric chamber. A first central die; And a second center die coupled to a distal end of the first center die to form the first extrusion path together with the outer die, the protrusion member being formed at a distal end thereof.

Meanwhile, in the apparatus for manufacturing a filling pipe using the waste plastic and the foaming agent, the foaming agent is injected into the waste plastic flowing from the first inlet to the atmospheric chamber, so that the foaming agent is mixed during the flow of the waste plastic. And is connected to a flow path connected from the inlet to the atmospheric chamber.

In the apparatus for manufacturing a filling tube using waste plastics and a foaming agent, the outer die comprises a first outer die installed in the mold body so as to have a structure to surround the center die while being spaced apart from the center die; A second outer die fixedly attached to the mold body to secure the first outer die to the mold body; A first through hole which is coupled to a distal end of the first outer die so as to have a continuous structure with the first outer die and which surrounds the protruding member formed on the center die and forms the first extruding path, A third outer die formed with a formed extension groove and a third inlet connected to the extension groove; And a second through hole coupled to a distal end of the third outer die and having a center coinciding with the first through hole and having a cross sectional area larger than that of the first through hole so as to form a second extrusion path on the outside of the core And a fourth outer die,

Meanwhile, in the filling tube manufacturing apparatus using the waste plastic and the foaming agent, the inertia-shaped portion is formed by supplying a molten resin having yellow color so as to further form a yellow coating layer on the inner wall of the filling tube formed by winding the inertia- And may further include a coating nozzle.

According to the present invention having such characteristics as described above, in the process of simultaneously extruding the core layer made of waste plastics and the outer layer made of the synthetic resin through one extrusion die, the waste plastics are expanded in an irregular form Since the boundary between the core material and the outer skin layer is changed into the concavo-convex structure by the irregular expansion of the waste plastics, the binding force between the core material and the outer layer is strengthened and the strength of the synthetic resin pipe is improved.

In addition, the waste plastics pellets are dried and then fed to an extruder. In addition, by introducing dry air into the core material, it is possible to prevent the generation of defects due to moisture contained in the waste plastics.

1 is a structural view of a filling tube manufacturing apparatus according to a preferred embodiment of the present invention;
2 is a perspective view of an extrusion die according to a preferred embodiment of the present invention,
3 is an exploded perspective view of an extrusion die according to a preferred embodiment of the present invention,
4 is a sectional view of an extrusion mold according to a preferred embodiment of the present invention,
FIG. 5 is a sectional view showing a state in which a profile is extruded inside an extrusion die according to a preferred embodiment of the present invention,
6 is a cross-sectional view of a profile extruded by an extrusion die according to a preferred embodiment of the present invention,
7 is a structural view of a dryer according to the present invention.
8 is a perspective view of a second center die of another structure according to the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

FIG. 2 is a perspective view of an extrusion mold according to a preferred embodiment of the present invention. FIG. 3 is a cross-sectional view of an extrusion mold according to a preferred embodiment of the present invention. 5 is a cross-sectional view showing a state in which a profile is extruded in an extrusion mold according to a preferred embodiment of the present invention, and FIG. 6 is a cross-sectional view of the extrusion mold according to a preferred embodiment of the present invention. Fig. 7 is a structural view of a dryer according to the present invention, and Fig. 8 is a perspective view of a second central die according to another embodiment of the present invention. Fig. Respectively.

The filling tube manufacturing apparatus according to the present invention comprises an extrusion portion 100, a sizing portion 200, a cooling portion 300 and an inertia portion 400. The extrusion portion 100, the sizing portion 200, The portion 300 and the inertia portion 400 are sequentially disposed to manufacture the profile 10 and spirally wind the manufactured profile 10 to produce a purposeful fill tube.

Meanwhile, the 'filling pipe' is defined as a synthetic resin pipe having a three-layered structure composed of an outer layer, an intermediate layer and an inner layer, which is formed by filling an intermediate layer made of waste plastic between an outer layer made of a synthetic resin and an inner layer. That is, the profile 10 manufactured by the filling tube manufacturing apparatus according to the present invention has a structure in which a core material 11 made of waste plastic is wrapped around an outer layer 12 made of a synthetic resin, The outer layer and the inner layer are made of a new synthetic resin and the intermediate layer positioned between the outer layer and the inner layer is made of waste plastic to form a filling tube.

The extrusion part 100 is manufactured by continuously extruding a profile 10 for manufacturing a filling tube. The extrusion part 100 according to the preferred embodiment of the present invention is formed of a profile having a rectangular or square sectional shape (10).

The extruding unit 100 may include a first extruder 110, a blowing agent dispenser 120, a second extruder 130, and an extrusion die 140.

The first extruder 110 supplies molten waste plastics to the extrusion die 140 after the pulverized plastic pellets in the form of granules are supplied and melted and the blowing agent injector 120 supplies the prepared blowing agent to the extrusion die 140 The second extruder 130 supplies the melted synthetic resin to the extrusion die 140 after supplying and melting the granular synthetic resin pellets in the form of granules. The first extruder 110 and the blowing agent The injector 120 and the second extruder 130 are not required to have a special structure in the practice of the present invention, and thus can be constructed using a commonly known extruder and a dispenser.

The extruding mold 140 is formed by mixing the waste plastics supplied from the first extruder 110 with the foaming agent supplied from the foaming agent dispenser 120 and converting waste plastic mixed with the foaming agent into the core material 11 At the same time, after the outer layer 12 made of the synthetic resin supplied from the second extruder 130 is formed on the outer side of the core 11, the profile 10 composed of the core 11 and the outer layer 12 is extruded .

To this end, the extrusion die 140 according to the present invention comprises a mold body 141, a center die 142, and an outer die 143.

The mold body 141 includes a first inlet 1411 to which the first extruder 110 is connected, a second inlet 1412 to which the foaming agent dispenser 120 is connected, And a standby chamber 1413 is provided.

The metal mold body 141 according to the preferred embodiment of the present invention includes a tubular body 141b for guiding the waste plastics and the foaming agent to the atmospheric chamber 1413 at one side of the body portion 141a formed with the atmospheric chamber 1413, A first flange portion 141c having a first inlet port 1411 formed at an outer end of the tube 141b and a second flange portion 141b having a second inlet port 1412 formed at an intermediate portion of the tube 141b, And a support portion 141d.

According to the mold body 141 having such a structure, the first extruder 110 is connected to the first flange portion 141c to supply molten waste plastic, and the foaming agent dispenser 120 is connected to the second flange portion 141d The waste plastic flowing into the first inlet 1411 from the first extruder 110 flows into the waiting chamber 1413 through the tube 141b and the second inlet 1412 And flows into the atmospheric chamber 1413 while being mixed with the blowing agent flowing through the through-holes. Thus, smooth mixing of the waste plastic and the foaming agent can be induced.

Meanwhile, the standby chamber 1413 is formed in a groove shape that is opened to the front surface of the body portion 141a, that is, formed to have a predetermined depth from the front surface of the body portion 141a. Therefore, the waste plastics flowing into the waiting chamber 1413 are discharged in the front direction of the main body portion 141a.

The center die 142 is coupled to the mold body 141 so as to have a structure passing through the center of the standby chamber 1413 and has an expansion space S And a protruding member 1426 is formed at the distal end.

More specifically, the center die 142 according to the preferred embodiment of the present invention is comprised of a first center die 1421 and a second center die 1422.

The first center die 1421 has a cylindrical structure including an outer circumferential surface spaced apart from the inner circumferential surface of the atmospheric chamber 1413 and coupled to the mold body 141 to have a structure penetrating the atmospheric chamber 1413 .

The first center die 1421 has a female screw portion 1423 for engagement with the second center die 1422 and extends from the female screw portion 1423 in the longitudinal direction of the first center die 1421. [ The center portion of the air inflow path 1424 is connected to the back surface of the first center die 1421 and passes through the first center die 1421.

4, the rear end of the first center die 1421 protrudes through the metal mold body 141 to the rear of the metal mold body 141, and a fastening ring R is fastened to the rear end of the metal mold body 141, A structure in which the center die 1421 is fixed to the mold body 141 is shown.

The second center die 1422 is coupled to the front end of the first center die 1421 to form the first extrusion path F1 together with the outer die 143. A protrusion member 1426 is formed at the tip end do.

More specifically, the second center die 1422 is provided at the rear end thereof with a male screw portion 1425 screwed to the female screw portion 1423 formed on the first center die 1421, and the male screw portion 1425 is screw- The first center die 1421 and the second center die 1422 are connected to the first center die 1421 so as to form a center die 142 having a single continuous cylinder shape. The outer circumferential surface and the outer circumferential surface of the second center die 1422 coincide with each other.

A protrusion member 1426 formed at the tip of the second center die 1422 forms an expansion space S inside the core member 11 and the protrusion member 1426 is inserted into the second center die 1422 and is formed to have a length sufficiently long to have a structure extending to the tip of the outer die 143. [

Such a protruding member 1426 may be composed of more than one, and in FIG. 3 there is shown a structure formed at the tip of the second center die 1422 so that the nine protruding members 1426 have a rectangular array structure And FIG. 8 shows a structure in which one protruding member 1426 is formed at the tip of the second center die 1422.

The volume of the projecting member 1426 thus formed is preferably determined in consideration of the amount of the foaming agent added to the waste plastic.

That is, by determining the addition amount of the foaming agent or the total volume of the projecting member 1426 so that the total volume of the projecting member 1426 is equal to the volume of the waste plastic expanded due to the addition of the foaming agent, So that the formed expansion space S is completely filled up by the expansion of the waste plastics.

The projecting member 1426 is formed with a spray hole 1427 for spraying air into the core member 11 and an air inflow path 1424 of the first center die 1421 Is formed at a central portion of the second center die 1422. The second center die 1422 is connected to the connection center 142a.

The outer die 143 surrounds the center die 142 and forms a first extrusion path F1 for forming the core material 11 together with the center die 142. The first extrusion path F1 for forming the core material 11 A third extruding passage F2 connected to the second extruder 130 for supplying the new synthetic resin to the second extruding passage F2 and a second extruding passage F2 for forming the outer layer 12 outside the third extruding passage F2, 1433c.

More specifically, the outer die 143 according to a preferred embodiment of the present invention includes a first outer die 1431, a second outer die 1432, a third outer die 1433, a fourth outer die 1434 .

The first outer die 1431 has a cylindrical structure having a two-stage structure of a large-diameter portion 1431a and a small-diameter portion 1431b. The large-diameter portion 1431a is located at the rear end, And the small diameter portion 1431b is inserted into the front surface of the mold main body 141. The small diameter portion 1431b is located at the front end portion of the mold main body 141 so as to protrude forward of the mold main body 141 and surrounds the center die 142 while being spaced apart from the outer circumferential surface of the center die 142, And is configured to form a flow path for the flow of the plastic.

The second outer die 1432 fixes the first outer die 1431 to the metal mold body 141 and presses the large diameter portion 1431a coupled to the metal mold body 141 to the metal mold body 141 Respectively.

The second outer die 1432 has a circular ring structure and has a latching protrusion 1432a corresponding to the large diameter portion 1431a. The second outer die 1432 passes through the second outer die 1432, And a plurality of bolts fastened to the mold main body 141.

The third outer die 1433 is coupled to the distal end of the first outer die 1431 so as to have a continuous structure with the first outer die 1431 to surround the protruding member 1426 formed on the center die 142, 1 extrusion furnace F1, and is supplied with fresh synthetic resin for forming the outer skin layer 12. [

The third outer die 1433 has the same outer diameter as the small diameter portion 1431b of the first outer die 1431 and has a shape corresponding to the shape of the core 11 of the profile 10, Hole 1433a having a through-hole 1433a. The first through hole 1433a is formed so as to surround the protruding member 1426 while being spaced apart from the protruding member 1426 formed at the tip of the center die 142 to form the first extruding path F1 .

The third outer die 1433 is formed with an extension groove 1433b and a third inlet 1433c through which the synthetic resin is introduced and the extension groove 1433b has a larger cross sectional area than the first through hole 1433a And the third inlet 1433c is formed to be connected from the outside of the third outer die 1433 to the extension groove 1433b.

The extension groove 1433b is formed to have a sufficiently large volume so that the synthetic resin introduced through the third inlet 1433c can be temporarily stored. The extension groove 1433b is connected to the third external die 1433, As shown in FIG.

The fourth outer die 1434 is coupled to the tip of the third outer die 1433 to form a second extrusion path F2 while partially closing the extension groove 1433b, And the first through hole 1433a is formed so as to form the second extrusion path F2 on the outer side of the core member 11 extruded through the first extrusion path F1. And a second through hole 1434a having a larger cross sectional area is formed in a structure penetrating the center portion.

At this time, the cross-sectional area of the second through-hole 1434a is smaller than the expansion groove 1433b, is larger than the first through-hole 1433a, and has a rectangular cross-section.

The third outer die 1433 and the fourth outer die 1434 constructed as described above sequentially pass through the fourth outer die 1434 and the third outer die 1433 and are positioned at the tip of the first outer die 1431 And can be fixed to the first outer die 1431 by fastening bolts.

In order to prevent the occurrence of defects due to moisture contained in the waste plastic pellets in the extruding unit 100 constructed as described above, a dryer 500 for supplying the waste plastic pellets to the first extruder 110 in a dried state ) May be further included.

The dryer 500 includes a container 510 capable of storing a predetermined amount of waste plastic pellets, an agitator 520 for agitating the waste plastic pellets in the container 510, And a blower 530 for injecting air to induce drying of waste plastic pellets.

The stirrer 520 may include a screw 521 installed vertically in the container 510 and a motor 522 connected to the screw 521 to rotate the screw 521 have.

The air blower 530 includes a blower 531 for blowing outside air into the interior of the container 510 and a heater 532 installed to be positioned on the flow path of the air flowing by the blower 531 to radiate heat ).

The extrusion unit 100 may further include a dry air supply device 600 for supplying dry air to the air inflow path 1424 formed in the center die 142.

The dry air supply device 600 removes water vapor in the air to supply dried air. The dry air supply device 600 may be constructed in a freezing or drying system. Dry air supplying devices of various structures are already used, The dry air can be supplied to the center die 142 by applying the supply device as it is. Therefore, a detailed description of the dry air supplying device 600 will be omitted.

The sizing unit 200 induces the profile 10 to have a desired shape and size through vacuum adsorption on the surface of the profile 10 that is extruded and molded from the extrusion unit 100, And is disposed at the rear end of the extrusion portion 100 on the basis of the process order.

The sizing unit 200 is provided with a frame having a hole corresponding to the shape and the size of the desired profile 10 and the surface of the profile 10 is vacuum- Thereby causing the profile 10 to have a desired shape and size in a manner to be attracted and pulled.

The cooling unit 300 cools the profile 10 through the sizing unit 200. The cooling unit 300 is disposed at a rear end of the sizing unit 200 on the basis of a manufacturing process order and is configured to cool the profile 10 10).

The inertia-shaped part 400 is formed by winding a profile 10 passing through the cooling part 300 in a spiral shape on the outside of the drum to form a tube shape. The inertia-type part 400 is positioned at the rear end of the cooling part 300, .

The inertia-shaped part 400 includes a plurality of rotation bars 410 arranged in a circular configuration, and the plurality of rotation bars 410 are connected to an unshown chain and rotated in the same direction .

The inertia-shaped portion 400 includes a guide mechanism 420 for pushing the profile 10 in the longitudinal direction of the rotation bar 410 to guide the profile 10 to be wound in a spiral structure, a spiral- An adhesive nozzle 430 for discharging the adhesive resin is provided between the first and second adhesive layers 10a and 10b.

In this inertial portion 400, a coating nozzle 440 for forming a yellow coating layer inside the filling pipe to be manufactured may be further included.

The coating nozzle 440 continuously discharges molten resin having a yellow color inside the filling pipe in the process of forming the filling pipe while the profile 10 is spirally wound and has a yellow coating layer .

Meanwhile, in the case where a yellow coating layer is formed inside the filling pipe, defects in the pipe can be detected more easily in the process of inspecting the inside of the pipe buried in the underground through imaging.

In the filling tube manufacturing apparatus according to the present invention having the above-described structure, the waste plastics supplied from the first extruder 110 flow into the waiting chamber 1413 through the first inlet 1411 and the tube 141b, The waste plastics mixed with the foaming agent are mixed with the foaming agent supplied from the extrusion die 120 and then the waste plastic mixed with the foaming agent is filled in the atmospheric chamber 1413 and then mixed with the first extrusion furnace F1 .

The synthetic resin supplied from the second extruder 130 flows into the expansion groove 1433b of the outer die 143 through the third inlet 1433c and the synthetic resin introduced into the expansion groove 1433b flows into the core 11 and the outer die 143. The second extrusion path F2 is formed between the outer die 141 and the outer die 143,

On the other hand, the profile 10 extruded from the mold body 141, the center die 142, and the extrusion die 140 comprising the outer die 143, And is directly introduced into the sizing unit 200. The sizing unit 200 has a structure in which the outer shell 12 is wrapped.

On the other hand, the profile 10 flowing into the sizing unit 200 is formed into a desired shape and size by vacuum adsorption in the sizing unit 200, and the waste plastic is expanded due to the foaming agent.

The expansion of the waste plastics is performed in a state in which the envelope layer 12 is constrained by the sizing unit 200. The expansion of the core 11 made of waste plastics causes the surface of the core 11 to be irregular, 11 and the outer skin layer 12 are formed.

The profile 10 is hardened as it is cooled as the profile 10 flows into the cooling part 300 while being irregularly expanded inside the core material 11 and the outer skin layer 12, Is wound spirally in the inertia-shaped part 400 to produce a filling pipe for the purpose.

As described above, the filling tube manufacturing apparatus according to the present invention is characterized in that the core material 11 made of waste plastics containing a foaming agent and the outer layer 12 made of a new synthetic resin are simultaneously extruded and sized, And the uneven structure is formed in the boundary region between the core material 11 and the outer skin layer 12 due to the expansion of the core material 11 so that the binding force between the core material 11 and the outer skin layer 12 is further strengthened And the strength of the filling pipe can be improved.

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 in the appended claims and their equivalents. Of course, such modifications are within the scope of the claims.

Description of the Related Art
10: Profile 11: Core
12: outer skin layer 100:
110: first extruder 120: blowing agent dispenser
130: Second extruder 140: Extrusion die
200: sizing unit 300: cooling unit
400: inertia portion 141: mold body
1411: first inlet 1412: second inlet
1413; Waiting chamber 142: center die
1421: first center die 1422: second center die
1424; Air inflow path 1426: Projection member
143: outer die 1431: first outer die
1432: second outer die 1433: third outer die
1433a: First through hole 1443b: Extension groove
1433c: third inlet 1434: fourth outer die
1434a: second through hole 500: dryer
510: vessel 520: stirrer
521: screw 530; Heat wind
600: Dry air supply device 440: Coating nozzle

Claims (7)

A first extruder 110 for melting and supplying waste plastic, a blowing agent dispenser 120 for supplying a foaming agent, a second extruder 130 for melting and supplying the new synthetic resin, The core 11 connected to the injector 120 and the second extruder 130 and continuously extruding the waste plastics, the foaming agent and the new synthetic resin to form a core 10 made of waste plastic is covered with a profile 10 An extrusion portion 100 comprising an extrusion die 140 for extrusion molding the extrusion die 100;
A sizing unit 200 for guiding the profile 10 to have a desired shape and size through vacuum suction of the surface of the profile 10 extruded and molded from the extrusion unit 100;
A cooling unit 300 for cooling the profile 10 coming out of the sizing unit 200; And
And an inertia part (400) for winding the profile (10) passing through the cooling part (300) in a spiral structure on the outside of the drum to form a tube shape,
The extrusion die (140)
A first inlet 1411 connected to the first extruder 110, a second inlet 1412 connected to the blowing agent injector 120 and a second inlet 1412 connected to the first extruder 110 through the first and second inlets 1411 and 1412, A mold main body 141 comprising a standby chamber 1413 in which waste plastic and a foaming agent are temporarily stored;
A projection member 1426 coupled to the metal mold body 141 to have a structure passing through the central portion of the standby chamber 1413 and forming an expansion space S inside the core member 11 when the core member is extruded A center die 142 formed; And
A first extrusion path F1 for forming the core material 11 is formed with the center die 142 while covering the center die 142 and the outer surface layer 12 is formed outside the first extrusion path F1. And a third inlet 1433c connected to the second extruder 130 for supplying the new synthetic resin to the second extrusion line F2 is formed to form a second extrusion path F2 for forming the second extrusion path F2 And an external die (143) made of a foamed material and extruding the core material (11) including the foaming agent and the outer skin layer (12) simultaneously from one extrusion die (140) Manufacturing apparatus. The method according to claim 1,
The extrusion unit 100 further includes a dryer 500 for drying the waste plastics and supplying the waste plastics to the first extruder 110,
The dryer (500)
A container 510 configured to store waste plastic pellets;
An agitator 520 for agitating the waste plastic pellets in the vessel 510, including a rotating screw 521 disposed inside the vessel 510; And
And a hot air blower (530) for injecting heated air into the container (510) to induce drying of the waste plastic pellets. The method according to claim 1,
An air inflow path 1424 formed to have a structure that penetrates the center die 142 in the longitudinal direction and to introduce outside air into the inside of the core material 11;
And a dry air supply device (600) connected to the air inflow path (1424) for supplying dry air from which steam has been removed to an air inflow path (1424). Manufacturing apparatus. The method according to claim 1,
The center die (142)
A first center die 1421 of a cylindrical structure including an outer circumferential surface spaced apart from the inner circumferential surface of the atmospheric chamber 1413 and coupled to the mold body 141 to have a structure passing through the atmospheric chamber 1413; And
The first center die 1421 is coupled to the front end of the first center die 1421 to form the first extrusion path F1 together with the outer die 143. The protrusion member 1426 has a rectangular arrangement 2 center die 1422. The apparatus for manufacturing a filling tube using the waste plastic and the foaming agent. The method according to claim 1,
The blowing agent is injected into the waste plastics flowing from the first inlet 1411 to the standby chamber 1413 so that the second inlet 1412 is discharged from the first inlet 1411 to the atmosphere Chamber 1413. The apparatus for manufacturing a filling tube using waste plastic and the foaming agent according to claim 14, The method according to claim 1,
The outer die (143)
A first outer die 1431 mounted on the mold body 141 to have a structure that surrounds the center die 142 while being spaced apart from the center die 142;
A second outer die 1432 fixedly attached to the mold body 141 to fix the first outer die 1431 to the mold body 141;
The first outer die 1431 is connected to the distal end of the first outer die 1431 so as to have a continuous structure with the first outer die 1431 and surrounds the protrusion member 1426 formed on the center die 142, And a third inlet 1433c connected to the extension groove 1433b. The first through hole 1433a forms an extension of the first through hole 1433a and the extension groove 1433b extends from the first through hole 1433a. 3 outer die 1433; And
A second through hole 1434a coupled to the distal end of the third outer die 1433 and having a center that coincides with the first through hole 1433a and has a larger cross sectional area than the first through hole 1433a, And a fourth outer die (1434) forming a second extrusion path (F2) on the outer side of the core (11), including the first extrusion path (F2). The method according to claim 1,
The inertia-shaped portion 400 includes:
And a coating nozzle (440) for supplying a molten resin having a yellow color to form a yellow coating layer on the inner wall of the filling tube formed by winding the profile (10) into a spiral structure. Filling tube manufacturing equipment using.

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