KR101663939B1 - Extrusion moulding apparatus - Google Patents

Abstract

The present invention relates to an extrusion molding apparatus comprising a main body, a first supply cylinder, a first transfer screw, a second supply cylinder, a second transfer screw, and an extruding mold connected to the front of each of the first supply cylinder and the second supply cylinder, and receiving each of the first extruded material and the second extruded material to be doubly extruded and molded. The extruding mold includes: a mold body in the form of a cylinder vertically opened, and including a first injection hole into which the first extruded material is injected inwardly in the outer circumferential surface of one side to be penetrated; an upper cover fixed to and combined with the upper part of the mold body, and including a hollow insert guide pipe inserted inside the mold body to protrude downwards; a vertical moving plate which is installed above the upper cover to be vertically moved based on the upper cover, which includes a long insertion rod to protrude downwards by passing through an insert guide pipe of the upper cover, and with which a hollow forming member in the form of a circular cone to allow an apex to oppose downwards is combined in the lower end of the insertion rod; a lower cover fixed to and combined with the lower part of the mold body to guide the first extruded material injected into a first injection hole of the mold body via the inside of the mold body to be moved downwards; and a double extrusion hole detachably screw-combined with the lower part of the lower cover, and receiving each of the first extruded material and the second extruded material to be doubly extruded.

Description

[0001] EXTRUSION MOLDING APPARATUS [0002]

The present invention relates to an extrusion molding apparatus capable of extruding two kinds of extruded materials to produce a hollow tube having various inner and outer diameters and an extruded product of various shapes having no hollow in a continuous manner through one extrusion die.

In general, extrusion molding refers to a processing method in which a material for extrusion is put into a cylinder, a material is squeezed and melted, and extruded with an extrusion die (die) to form a molded product having a predetermined shape, followed by cooling and solidifying the product.

An apparatus for producing a product through the above-described extrusion molding method is referred to as an extrusion molding apparatus (extruder), and can be largely divided into a screw type and a non-screw type according to the extrusion principle. The non-screw type means extruding a material using a ram, a roller or a cam, and the screw type means extruding a material through a screw.

A screw extruder can be divided into a single shaft and multiple shafts. The extruding of a material by a single screw as it is called is called a short shaft, and when two or more screws are engaged, the material is extruded.

In principle, a single material is pushed out by an extrusion die to produce a molded article. In recent years, a double extrusion method has been used in which two kinds of materials are pushed together by an extrusion die to produce a molded article.

Whichever extrusion method is used, the injection material is squeezed, melted and pushed out to the extrusion mold to continuously produce the molded products of a certain shape. The products such as hollow tube, hose, gasket, packing and molding are mainly produced.

When various products having various shapes are to be extruded and manufactured as described above, there is a problem that separate extrusion dies must be provided for each shape. However, it is very difficult to have a separate extrusion mold corresponding to various shapes, such as a small company mainly focusing on order production of a small quantity of various kinds of products. Especially, it is difficult to provide a double extrusion In the case of a mold, there is a problem that it is expensive and expensive.

SUMMARY OF THE INVENTION It is an object of the present invention, which is devised to solve the problems as described above, to provide a hollow tube having various inner and outer diameters by extruding two kinds of extruded materials, And an extrusion molding apparatus which can manufacture the extrusion molding apparatus.

Other objects, specific advantages and novel features of the present invention will become more apparent from the following detailed description and preferred embodiments with reference to the accompanying drawings.

In order to achieve the above object, the extrusion molding apparatus according to the present invention comprises a main body, a main body, and a main body, which are installed along the longitudinal direction in the upper part of the main body, A first feed cylinder which is rotatably installed in the first feed cylinder and which presses the first extruded material inserted into the first feed cylinder and feeds the first extruded material forward to the first feed cylinder; A second supply cylinder provided on an upper portion of the main body in a longitudinal direction and having a second loading port so that a second extruded material is injected into the rear upper portion; A second feed screw installed to feed the second extruded material into the second feed cylinder and pushing the second extruded material forward to the second feed cylinder, And an extrusion die connected to a front side of each of the first and second supply cylinders and for injecting and extruding the first extruded material and the second extruded material, respectively, wherein the extruded mold has a cylindrical shape with upper and lower openings, A hollow insertion guide tube fixedly coupled to an upper portion of the mold body and inserted into the inside of the mold body is provided at a lower side of the mold body and having a first insertion hole through which the first extrusion material is injected, An elongated insertion rod is formed on the upper cover so as to be movable up and down with respect to the upper cover and protruded downward through the insertion guide tube of the upper cover, An upper copper plate having a cone-shaped hollow forming member coupled to the lower end of the rod so that the vertex pointed downward; A lower cover for guiding the first extruded material injected into the first injection hole of the mold body to move downward through the inside of the mold body; a lower cover detachably screwed to the lower portion of the lower cover, And a second extrusion port for injecting and extruding the first extruded material and the second extruded material, respectively.

The upper copper plate has a pair of upper and lower movable holes vertically penetratingly formed on the inner circumferential surface so as to be symmetrical with each other and each lower end is coupled to the upper cover so as to be inserted into the upper and lower movable holes of the upper and lower copper plates, A pair of upper and lower adjustment bolts each having an opposite end extended upward and a plurality of upper and lower adjustment bolts each screwed to each of the upper and lower adjustment bolts to vertically move the upper and lower copper plates up and down, And further includes a vertical adjustment nut.

The lower cover includes a ring-shaped lower cover ring fixedly coupled to the lower portion of the metal body, and a lower portion of the ring-shaped lower cover ring fixedly coupled to the lower portion of the metal body. And a plurality of pushing bolts for pushing and fixing the upper circumferential surface of the work guide tube through the outer circumferential surfaces of the lower cover ring, respectively.

The upper and lower compartments are screwed to the lower portion of the lower cover with respect to the upper and lower compartments, and the upper and lower compartments are connected to the upper and lower compartments And a second injection hole through which the second extrusion material is injected is formed in a lower outer circumferential surface of the second extrusion fitting hole, A double extrusion die in which an annular secondary injection path is formed so as to communicate with a second injection hole of the double extrusion fixture and the secondary injection tube is formed so as to pass through the secondary injection path and connected to a part of the double extrusion window, Extrusion die is inserted into the lower part of the double extrusion fixing part in a ring shape so as not to be separated from the double extrusion part, It characterized in that it comprises an extrusion die which is fixed to the lower metal fitting.

The cross-sectional shape of the extruded product is determined according to the cross-sectional shape of the double extruded window of the double extruded die, and the cross-sectional shape of the extruded product to be double-extruded along the connected portion of the double- .

When the extruded product is to be manufactured in the form of a hollow tube, the extruded product is replaced with a double extrusion die having a circular cross-sectional shape corresponding to the outer diameter of the extruded product, Is intertwined with the inside of the circular cross section of the double extruded window while being moved up and down together to be adjusted according to the inner diameter size of the extruded product.

When the extruded product is to be manufactured in a shape that does not have a hollow shape, the double extrusion die may be replaced with the double extrusion die so as to match the sectional shape of the extruded product, The extruded product is extruded and manufactured in a sectional shape of the double extruded window so as not to interfere with the inside of the double extruded window cross section of the die.

Further, the present invention is characterized by further comprising a vulcanizing section provided below the extrusion die for applying heat to the extruded product extruded from the double extrusion port of the extrusion die.

The vulcanizing unit may include a floor support rod which is supported by the bottom surface so as to be widely contacted with the floor, a long elongated rod shaft vertically coupled to the floor support rod vertically, a rotation bracket rotatably inserted into the elongated rod shaft, A rotary bracket fixedly coupled to an outer circumferential surface of the cylindrical body, and a heater for applying heat to the extruded product that enters the interior of the rotary bracket.

Further, the present invention is characterized by further comprising an air-cooling type cooling fan installed in front of the main body and blowing air toward the double extrusion port of the extrusion die.

The extrusion molding apparatus according to the present invention can extrude two kinds of extruded materials to produce hollow tubes having various inner and outer diameters, and extruded products of various shapes without hollows through a single extrusion die.

1 is a perspective view showing an embodiment of an extrusion molding apparatus according to the present invention,
Fig. 2 is a main part perspective view showing an extrusion die in the embodiment of Fig. 1,
Figure 3 is an exploded perspective view of the embodiment of Figure 2,
4 and 6 are perspective views showing the operation of the upper copper plate of the embodiment of FIG. 2,
FIGS. 6 and 7 are perspective views showing a process of engaging the lower cover of the embodiment of FIG. 3,
FIG. 8 is a perspective view showing a double extrusion of the embodiment of FIG. 3,
FIG. 9 is a plan view showing a double extrusion die in the embodiment of FIG. 8,
FIGS. 10 and 11 are perspective views showing a process of joining a double extrusion port and an upper and a lower copper plate when an extruded product is manufactured in a hollow tube shape,
12 is a cross-sectional view taken along the line A-A 'in the embodiment of FIG. 2,
13 is a cross-sectional view taken along a line B-B 'in Fig. 11,
FIGS. 14 and 15 are perspective views showing the process of replacing the double extrusion die and the operation of the upper and lower copper plates when the extruded product is to be manufactured in a shape having no hollow,
16 is a cross-sectional view taken along line C-C 'of Fig. 15,
17 is a perspective view showing another embodiment of the extrusion molding apparatus according to the present invention,
Fig. 18 is a principal perspective view showing the vulcanizing portion of the embodiment of Fig. 17,
FIG. 19 is a perspective view showing the operation of the cooling fan in the embodiment of FIG. 17; FIG.

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

1 to 19, the extrusion molding apparatus according to the present invention includes a main body 10, a first feeding cylinder 20, a first feeding screw 30, a second feeding cylinder 40, A screw 50 and an extrusion mold 60 and may further include a vulcanizing unit 70 and a cooling fan 80. [ The extrusion mold 40 includes a mold body 100, an upper cover 200, an upper copper plate 300, a lower cover 400, and a double extrusion port 500.

As shown in FIGS. 1 and 17, the main body 10 is a hexahedral frame erected on a floor surface. Various driving parts, control parts, and the like are mounted and coupled to the main body 10, though not shown.

1 and 17, the first supply cylinder 20 is installed on the upper portion of the main body 10 along the longitudinal direction of the main body 10, and the first extruding material M1 is inserted into the inlet port 21 are formed. The first supply cylinder 20 has a cylindrical shape and is formed with a first inlet 21 so that the first extruded material M 1 can be introduced into the first supply cylinder 20. The first inlet 21 is formed in the rear of the first feed cylinder 20 because it is heated and pressurized when it is fed forward through the first feed screw 30 to be described later so that it is properly resinized to facilitate extrusion .

1 and 17, the first feed screw 30 presses the first extruded material M1 inserted into the first feed cylinder 20 and feeds the first extruded material M1 to the front of the first feed cylinder 20, . The first extruded material M1 conveyed through the first conveyance screw 30 is injected into an extrusion die 60 to be described later.

1 and 17, the second supply cylinder 40 is installed along the longitudinal direction on the upper portion of the main body 10 so as not to interfere with the first supply cylinder 20, A second inlet 41 is formed so that the extruded material M2 is injected into the inside. The construction and operation of the second supply cylinder 40 is the same as that of the first supply cylinder 20 and the second extruded material M2 is different from the first extruded material M1.

The second feed screw 50 is rotatably installed in the second feed cylinder 40 as shown in FIGS. 1 and 17, and the second feed screw 40 is inserted into the second feed cylinder 40, The material M2 is pressed and transferred to the front of the second supply cylinder 40. [ The construction and operation of the second conveyance screw 50 is also the same as that of the first conveyance screw 30 except that the second extrusion material M2 is pressed and conveyed differently from the first extrusion material M1 .

The extrusion mold 60 is connected to the front of each of the first supply cylinder 20 and the second supply cylinder 40 as shown in Figs. 1, 17 and 19, 2 extruded material (M2) are respectively injected and extruded. In order that the first extruded material M1 and the second extruded material M2 injected into the extruding mold 40 are extruded in a double manner, the mold body 100, which is a specific constitution of the extruding mold 40, (200), an upper copper plate (300), a lower cover (400), and a double extrusion port (500), and their characteristic configurations and operation will be described in detail.

As shown in FIGS. 2 and 3, the mold body 100 is in the form of a vertically-opened cylindrical shape, and a first injection hole 110 through which the first extruded material M1 is injected is formed through one outer peripheral surface of the mold body 100 . The first extruded material M 1 is pressed and transferred through the first supply cylinder 20 and the first conveyance screw 30 and the first extruded material M 1, And injected into the mold body 100 through the first injection hole 110.

2 to 5, the upper cover 200 is fixedly coupled to the upper portion of the mold body 100, and a hollow insertion guide tube 210 inserted into the mold body 100 is coupled downward Respectively. That is, the upper cover 200 closes the opened top of the mold body 100, and a hollow insertion guide tube 210 protrudes from the top cover 200 and is inserted into the mold body 100 . The hollow insertion guide tube 210 formed in the upper cover 200 is inserted by the insertion rod 310 of the upper and lower copper plates 300 to be described later and serves as a guide when the insertion rod 310 is moved up and down.

The upper copper plate 300 is installed above the upper cover 200 so as to be movable up and down with reference to the upper cover 200 as shown in FIGS. 2 to 5, A hollow insertion member 310 is formed to protrude downward through the pipe 210 and a conical hollow member 320 is coupled to the lower end of the insertion rod 310 such that the vertex is downward .

The upper and lower copper plates 300 are vertically penetrated through a pair of upward and downward movement holes 330 symmetrically with respect to the inner circumferential surface so that the upper and lower copper plates 300 can move up and down with respect to the upper cover 200, And moves up and down through the vertical adjustment bolt 340 and the vertical adjustment nut 350. That is, a pair of the vertically adjusting bolts 340 are coupled to the upper cover 200 so that the lower ends thereof are inserted into the upper and lower moving holes 330 of the upper and lower copper plates 300, respectively, Respectively. The upper and lower adjustment bolts 340 are screwed to each other to vertically move the upper and lower copper plates 300 up and down with respect to the upper and lower adjustment bolts 340. [ Move it while fixing it.

When the upper copper plate 300 is moved up and down with respect to the upper cover 200 as described above, the insertion rod 310 and the hollow forming member 320 of the upper copper plate 300 are also inserted into the upper cover 200, And moves up and down along the guide pipe 210. The hollow forming member 320 may be formed of a hollow tube having an inner diameter larger than the inner diameter of the hollow extruded product 500 when the hollow extruded product 520 is to be manufactured in accordance with the cross sectional shape of the double extrusion window 521 engraved in the double extrusion die 520 And performs a function for adjusting the size.

The lower cover 400 is fixedly coupled to the lower portion of the mold body 100 as shown in FIGS. 2, 3, 6 and 7, So that the first extruded material M1 is guided to move downward via the inside of the mold body 100. The lower cover 400 may include a lower cover ring 410, a material guide pipe 420, and a compression bolt 430.

That is, the lower cover ring 410 is fixedly coupled to the lower portion of the mold body 100 in a ring shape. In addition, the material guide pipe 420 is annular in shape and inserted into the inner side of the lower cover ring 410 and is hooked, and a lower portion formed with threads on the outer circumferential surface protrudes below the lower cover ring 410. At this time, a plurality of pressing bolts 430 are provided so as to penetrate the outer circumferential surface of the lower cover ring 410, respectively, to press and fix the upper circumferential surface of the work guide pipe 420.

The lower cover 400 having the above-described structure may be configured to separately detach the material guide tube 420 while separately forming the lower cover ring 410 and the material guide pipe 420. If necessary, the material guide pipe 420 may be replaced To change the pressure of the first extruded material (M1) to be injected or to change the characteristics of the extruded product (P) in conjunction with the double extrusion port (500) to be described later. Particularly, the double extrusion die 500, which is inserted into the double extrusion opening 500 while being threadedly formed in the lower part of the material guide pipe 420, So that they can be easily replaced.

The double extrusion port 500 is detachably screwed to the lower portion of the lower cover 400 as shown in FIGS. 2, 3 and 8 to 16, and the first extruded material M1 and the second extruded material M2) is injected and extruded. That is, the double extrusion port 500 may include a double extrusion fixture 510, a double extrusion die 520, and an extrusion die coupling 530, and may be formed of two kinds of extruded materials M1 and M2 It is injected and extruded together.

In order to inject the first extruded material M1 and the second extruded material M2 and to extrude the same, the double extrusion fixture 510 has an annular upper and lower compartments 511 formed on the inner surface thereof, The upper portion of the second extruded material M2 is screwed to the lower portion of the lower cover 400 with respect to the upper and lower partitions 511, The second injection hole 512 is formed through the second injection hole 512. The second extruded material M2 is pressurized and conveyed through the second feed cylinder 40 and the second conveyance screw 50 and the second extruded material M2 conveyed by pressure is conveyed Is injected through the second injection hole 512 into the secondary injection path 522 of the double extrusion die 520 to be described later.

The double extrusion die 520 is opened upward and a double extrusion window 521 is formed in a closed lower portion to be inserted into a lower portion of the double extrusion fixing device 510, A secondary injection path 522 is formed on the outer circumference so as to communicate with the injection hole 512 and a secondary injection tube 523 penetrating from the secondary injection path 522 to the inside is formed in the double extrusion window 521).

At this time, the extrusion die fitting 530 is formed in a ring shape so that the double extrusion die 520 is inserted into the lower portion of the double extrusion fixing device 510, And is fixedly coupled.

The first extruded material M 1 is screwed to the lower portion of the lower cover 400 through the upper portion of the double extrusion fixture 510 to be guided into the lower cover 400, The second extruded material M2 is injected through the second extruded material 510 and the second extruded material M2 is injected from the lower part of the second extruded material fixture 510 Lt; / RTI >

The first extruded material M 1 is pressed downward through the inside of the double extrusion fixture 510 and the second extruded material M 2 passes through the secondary injection path 522 of the double extrusion die 520, Through the secondary injection pipe 523, to the area connected to a part of the double extrusion window 521 and moves. Therefore, in the double extrusion window 521, a region connected to the secondary injection tube 523 and a region not connected to the secondary injection tube 523 are formed. At this time, the region not connected to the secondary injection tube 523 is subjected to the first extrusion The material M1 is extruded and the second extruded material M2 is extruded in a partial region connected to the secondary injection pipe 523 so that two kinds of extruded materials M1 and M2 are injected through the double extruded window 521 Respectively.

That is, the cross-sectional shape of the extruded product P is determined according to the cross-sectional shape of the double extrusion window 521 of the double extrusion die 520, Sectional shape of the extruded product P to be double-extruded varies depending on the connected portion of the extrusion window 521. [

8 to 13, when the extruded product P is to be manufactured in a hollow tube shape, the sectional shape of the double extrusion window 521 may be circular The hollow molding member 320 moves up and down together with the upward and downward movement of the upper copper plate 300 to interfere with the inside of the circular cross section of the extrusion window 521, Is adjusted to the inner diameter size of the product (P). That is, a double extrusion die 520 having a circular extrusion window 521 having a diameter equal to the outer diameter of the hollow tube-shaped extruded product P to be manufactured is formed, When the upper and lower copper plates 300 are moved up and down in accordance with the inner diameter size of the extruded product P having the shape, the hollow forming member 320 enters and interferes inside the circular cross section of the double extrusion window 521, The inner diameter of the product P can be adjusted.

14 to 16, when the extruded product P is to be manufactured in a shape having no hollow, the double extrusion die 520 is replaced with the double extrusion die 520 to match the sectional shape of the extruded product P The hollow copper plate 300 is lifted so that the hollow forming member 320 is lifted together to prevent the double extrusion window 521 from interfering with the inside of the double extrusion window 521, The extruded product P can be extruded and manufactured in a cross-sectional shape of the extruded product P. That is, when the extruded product P to be manufactured does not have a hollow, the hollow forming member 320 should not interfere with the double extrusion window 521, so that the upper and lower copper plates 300 are raised so that the hollow forming member 320 The first extruded material M1 and the second extruded material M2 are extruded as they are in the form of a cross section of the double extrusion window 521 to extrudate and produce the extruded product P .

On the other hand, the extruded product P extruded through the extrusion mold 60 can be cured by a natural drying method, but can be changed more stably and elastically through a vulcanization process. To this end, it may further include a vulcanizing unit 70 as shown in FIGS. 17 to 19, and may further include a cooling fan 80 together with the vulcanizing unit 70.

First, the vulcanizing unit 70 is installed below the extrusion die 60 and applies heat to the extruded product P that is extruded from the double extrusion port 500 of the extrusion die 70. 18, the vulcanizing unit 70 includes a floor support 71 which is supported by the bottom surface of the bottom support 71 in a wide contact with the floor, A rotary bracket 73 which is rotatably inserted into and coupled to the rotary shaft 72; a rotary bracket 73 fixedly coupled to an outer peripheral surface of the rotary bracket 73; and a cylindrical heater (not shown) And a heater 74 fixed to the outer circumferential surface of the rotary bracket 73 to apply heat to the extruded product P which enters the interior of the rotary bracket 73.

Therefore, the extruded product P extruded and manufactured from the double extrusion port 500 of the extrusion die 60 enters the heater 74 of the vulcanizing section 70 located below the extrusion die 60, will be. If the vulcanization of the extruded product P is not necessary, the rotation bracket 73 coupled with the heater 74 may be rotated about the long shaft 72 to be released from the lower portion of the extrusion die 60 have. Although not shown in the drawing, the extruded product P vulcanized through the vulcanizing unit 70 may be continuously conveyed through a conveyor belt, a plurality of guide rollers, or the like, or may be cut have.

On the other hand, as shown in Fig. 19, the heat generated by the heater 74 of the vulcanizing unit 70 reaches up to the double extrusion port 500 of the extrusion die 60, (M2) of the extruded material (M2) before passing through the extruded material (500), there may arise a problem that the extruded material has an adverse effect on the optimum extruding condition, that is, an appropriate temperature, pressure and viscosity. In order to prevent this, an air-cooling cooling fan 80 for blowing air toward the double extrusion port 500 of the extrusion die 60 is installed in front of the main body 10 as shown in FIGS. 17 and 19 do. That is, the heat that flows upward from the heater 74 of the vulcanizing unit 70 is blocked through the cooling fan 80 and the optimum temperature is ensured in the double extrusion port 500 of the extrusion die 60 So that the quality of the extruded product P can be improved.

As described above, the extrusion molding apparatus according to the present invention can extrude two kinds of extruded materials to produce hollow tubes having various inner diameters and outer diameters, and extruded products of various shapes without hollows through a single extrusion die have.

The embodiments of the present invention described above and shown in the drawings should not be construed as limiting the technical idea of the present invention. The scope of protection of the present invention is limited only by the matters described in the claims, and those skilled in the art will be able to modify the technical idea of the present invention in various forms. Accordingly, such improvements and modifications will fall within the scope of the present invention as long as they are obvious to those skilled in the art.

M1: First extruded material
M2: Second extruded material
P: Extruded product
10: Body
20: first supply cylinder 21: first inlet
30: 1st feed screw
40: second supply cylinder 41: second inlet
50: Second feed screw
60: Extrusion mold
70:
71: floor support 72:
73: rotation bracket 74: heater
80: Cooling fan
100: mold body 110: first injection hole
200: upper cover 210: insertion guide tube
300: Shanghai copper plate 310: Insertion rod
320: hollow forming member 330: up and down moving hole
340: Vertical adjustment bolt 350: Vertical adjustment nut
400: lower cover 410: lower coverring
420: material guide tube 430: compression bolt
500: Double extrusion hole 510: Double extrusion hole
511: upper and lower compartments jaws 512: second injection hole
520: Double extrusion die 521: Double extrusion window
522: Secondary injection channel 523: Secondary injection tube
530: extrusion die coupling

Claims (10)

A first supply cylinder provided on the upper portion of the main body in a longitudinal direction of the body and having a first loading port so that the first extruded material is injected into the rear upper portion; A first feed screw installed in the first feed cylinder and pressing the first extruded material into the first feed cylinder and feeding the first extruded material to the front of the first feed cylinder; A second feed cylinder having a second feed port formed therein for feeding a second extruded material into the first feed cylinder; a second feed cylinder rotatably installed in the second feed cylinder, And a second feed screw connected to the front of each of the first feed cylinder and the second feed cylinder for feeding the first extruded material and the second extruded material, And an extrusion die for injecting and extruding the second extruded material, respectively,
Wherein the extrusion die has:
A mold body having a vertically opened cylindrical shape and having a first injection hole through which the first extruded material is injected,
An upper cover fixedly coupled to the upper portion of the mold body and having a hollow insertion guide tube protruded downward to be inserted into the mold body,
And an elongated insertion rod is formed to protrude downwardly through the insertion guide tube of the upper cover, and a vertex point is formed downward at the lower end of the insertion rod An upper copper plate joined to the hollow forming member in a conical shape so as to face the upper copper plate,
A lower cover fixed to the lower portion of the mold body and guiding the first extruded material injected into the first injection hole of the mold body to move downward through the inside of the mold body,
And a double extrusion port which is detachably connected to a lower portion of the lower cover and which receives the first extruded material and the second extruded material, respectively, and double extrudes the extruded material.
The method according to claim 1,
The upper copper plate,
A pair of upward and downward movement holes are formed in the inner circumferential surface so as to be symmetrical with each other,
A pair of upper and lower adjustment bolts each having a lower end coupled to the upper cover to be inserted into each of the upper and lower shift holes of the upper copper plate,
Further comprising a plurality of vertically adjusting nuts screwed to each of the up-and-down adjusting bolts to vertically move the upper and lower copper plates while vertically moving the upper and lower adjusting bolts.
The method according to claim 1,
Wherein the lower cover comprises:
A ring-shaped lower cover ring fixedly coupled to the lower portion of the mold body,
A material guide tube having an upper portion inserted into and engaged with an inner side of the lower cover ring and having a lower portion formed with threads on an outer peripheral surface thereof protruding downward from the lower cover ring,
And a plurality of pressing bolts penetrating the outer circumferential surfaces of the lower cover ring to respectively press the upper circumferential surfaces of the work guide tubes.
The method according to claim 1,
The double-
Wherein an upper portion of the lower cover is screwed to a lower portion of the lower cover with respect to the upper and lower section jaws, A double extrusion fixture having a second injection hole through which an extruded material is injected,
An annular secondary injection path is formed on the outer circumference so as to communicate with a second injection hole of the double extrusion fixing device, A double extrusion die in which a secondary injection tube formed so as to pass through from the secondary injection path to the inside is connected to a part of the double extrusion window,
And an extrusion die coupling member fixedly coupled to a lower portion of the double extrusion fixing member so as to support the double extrusion die in a ring shape so as not to be separated from the double extrusion fixing member while being inserted into the lower portion of the double extrusion fixing member.
5. The method of claim 4,
The double-
Wherein the cross-sectional shape of the extruded product is determined according to the cross-sectional shape of the double extruded die of the double extruded die, and the cross-sectional shape of the extruded product to be double-extruded varies depending on the connected portion of the secondary injection pipe and the double- Device.
6. The method of claim 5,
Wherein when the extruded product is to be manufactured in the form of a hollow tube, the extruded product is replaced with a double extrusion die having a circular cross-sectional shape so as to match the outer diameter of the extruded product, Wherein the extruded product is adjusted in accordance with the inner diameter of the extruded product by interfering with the inside of the circular cross section of the double extruded window while moving up and down.
6. The method of claim 5,
Wherein when the extruded product is to be manufactured in a shape that does not have a hollow shape, the double extrusion die is changed to fit the sectional shape of the extruded product, the upper copper plate is raised, Wherein the extruded product is extruded and manufactured in a cross-sectional shape of the double extruded window so as not to interfere with the inner surface of the double extruded window.
The method according to claim 1,
Further comprising a vulcanizing section provided below the extrusion die for applying heat to the extruded product extruded from the double extrusion port of the extrusion die.
9. The method of claim 8,
The above-
A floor support which is supported in contact with the floor surface widely,
A long elongated rod shaft vertically coupled upright from the floor support,
A rotation bracket rotatably inserted into and coupled to the long shaft;
And a heater for fixing the rotary bracket to the outer circumferential surface of the cylindrical heat exchanger, the heat exchanger including a heat wire heater inside the heat exchanger, and heating and vulcanizing the extruded product by applying heat to the extruded product.
9. The method of claim 8,
Further comprising an air cooling type cooling fan installed in front of the main body for blowing air toward the double extrusion port of the extrusion die.

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