KR200268962Y1 - a polymer extruder - Google Patents

Abstract

The present invention relates to an extrusion apparatus for extruding a polymer such as rubber or plastic, and more particularly to an extrusion apparatus that can be extruded with a small amount of raw materials. The extrusion device of the present invention is a melt stirring part 10 and the melt stirring part 10 to put a raw material into the reaction tank 11 to dissolve as a solvent and at the same time to heat and melt while stirring to make a uniform composition and to extrude vertically ) And the solvent discharge portion 20 for discharging the solvent gas generated during the raw material melting process to condense into a liquid solvent, and horizontally disposed below the vertical extrusion port 12 of the melt stirring portion 10 It is provided with a horizontal extrusion part 30 in communication with the outlet 33a of the sphere 12. According to the extrusion apparatus of the present invention, since a sufficient melting and stirring is performed in the reaction tank 11, a homogeneous high-density extrusion molded product can be obtained even with a short extrusion screw rod (17, 34), extrusion screw rod (17, The shorter the length of 34), the lower the weight and the less the required power. The lower the operating cost and the smaller the raw material.

Description

Polymer Extruder

The present invention relates to a polymer extrusion apparatus, and more particularly, to an apparatus for melting and extruding a polymer raw material such as plastic or rubber.

As an extrusion apparatus for extruding a polymer such as plastic or rubber, a conventional one as shown in FIG. 4 has been mainly used. The conventional extrusion apparatus shown in FIG. 4 includes a raw material hopper 41 which contains raw materials in the form of powder or pellets and supplies them downward by its own weight, and is disposed in a horizontal direction while communicating with a lower end of the raw material hopper 41. And a transfer part 42 for melting the raw material supplied from 41 to transfer the molten raw material forward, wherein the transfer part 42 has a substantially cylindrical shape in which a heat-transfer heater (not shown) is built to heat-melt the material therein. The body 43 and the inside of the body 43 in the axial direction is rotated by the drive motor 44 while pushing the material melted by the electric heater with a screw 45a to the front end of the body 43 Consists of a feed screw rod 45 that is pushed toward the die head (not shown) provided.

In the extrusion apparatus, a solvent and a filler are mixed and introduced to smoothly melt the raw material made of pellets or powder, and air is also mixed with the raw material when the raw material is added. Both the solvent, the filler, and the air are conveyed (42). As the material is heated and melted at), all of them must be removed during extrusion extrusion by the transfer screw 45a to make the composition of the material uniform, formability is improved, and high density and homogenization of the material can be achieved.

Therefore, for the high density and homogenization of the material, the length of the conveying part 42, specifically, the length of the screw rod 45, is sufficiently long so that the material is sufficiently volatile solvent or air in the material while being conveyed by the conveying screw 45a. To be discharged.

As such, the conventional extrusion apparatus has various disadvantages as follows because of the length of the screw rod 45. That is, since the length of the screw rod 45 is increased, the weight of the screw rod 45 is increased, so that the required power for rotating the screw rod 45 is also increased.

In addition, when the filler is added or mixed with heterogeneous polymer, the homogeneous mixing time is too short, and in particular, when dissolving using a solvent at a temperature lower than the melting point of the polymer, it is not only homogeneous but also has a low viscosity and does not form. have.

In the conventional extrusion apparatus, since the length of the screw rod is increased, a large amount of raw material must be put into the transfer part 42 to sufficiently melt-extrude the raw material, and thus extrusion is impossible with a small amount of raw material.

Accordingly, the present invention enables extrusion molding with a small amount of material, and achieves sufficient melting and homogenization and high density of the melted material while minimizing the size of the equipment to improve the extrusion performance, and can be applied to various molding apparatuses. It is an object to provide a compact polymer extrusion apparatus.

1 is a schematic cross-sectional view of a first embodiment of an extrusion apparatus according to the present invention,

2 is a perspective view showing the reactor structure of the first embodiment of the present invention,

3 is a schematic cross-sectional view of a second embodiment of an extrusion apparatus according to the present invention,

Figure 4 is a cross-sectional view schematically showing the structure of a conventional general extrusion apparatus.

※ Explanation of code about main part of drawing ※

10: melt stirring part 11: reactor

12: vertical extrusion port

13: outlet 14: heater

15: rotating shaft 16: stirring blade

17: vertical extrusion screw rod 17a: transfer screw

18: bidirectional drive motor 18a: motor shaft

20: solvent discharge portion 21: gas discharge pipe

22: condenser 23: cooling tube

24: 3-way valve 25: solvent reservoir

30: horizontal extrusion part 31: body

32: horizontal extrusion port 33: extrusion die head

33a: outlet 34a: horizontal extrusion screw rod

34a: transfer screw 35: drive motor

36: timer

The present invention for achieving the above object is to dissolve the raw material as a solvent and at the same time by heating and melting while stirring to make a uniform composition, and then to vertically extrude the melt stirring portion and the volatile solvent generated in the melt stirring portion condensation It consists of a solvent discharge unit.

In addition, the present invention is to dissolve the raw material as a solvent and at the same time by heating and melting while stirring to make a uniform composition and vertically extruded melt stirring portion, and a solvent discharge portion for discharging the condensation of the volatile solvent generated in the melt stirring portion and It consists of a configuration including a horizontal extrusion unit for extruding the horizontally through the outlet by pressurizing and transporting the molten raw material vertically extruded from the molten stirring part in the horizontal direction.

Extrusion apparatus of the present invention configured as described above is used as an extrusion apparatus, as well as by attaching several types of molding die head to the tip of the extrusion portion can be used as several types of molding apparatus.

The present invention is capable of homogenizing the molten material without achieving a separate horizontal extrusion part by completely dissolving and melting the raw materials in the melt stirring part and discharging the volatile solvent by the configuration as described above, and achieving high density as well as horizontal Even if the extrusion part is not passed through or passes through a relatively short horizontal extrusion part, extrusion molding can be performed with a small amount of material, thereby increasing the efficiency of the equipment.

Hereinafter, embodiments according to the present invention will be described in detail according to the accompanying drawings.

1 is a cross-sectional view schematically showing a first embodiment of a polymer extrusion apparatus according to the present invention.

In the first embodiment of the polymer extrusion apparatus according to the present invention, as shown in Figure 1, the melt stirring part 10 to dissolve the raw materials as a solvent and at the same time to heat and melt while stirring to make a uniform composition and to extrude vertically (10) ) And a solvent discharge unit 20 for discharging and condensing the volatile solvent generated in the molten agitator 10.

As shown in FIGS. 1 and 2, the molten stirring part 10 has a substantially cylindrical shape, accommodates raw materials therein, and has a vertical extrusion port 12 vertically along a central axis direction at a lower portion thereof. A reactor 11 having an outlet 13 communicated with the vertical extrusion port 12, a heater 14 provided on an outer wall of the reactor 11 to heat the reactor 11, and the reactor 11 It is disposed in the vertical direction along the central axis direction of, a plurality of stirring blades 16 on the outer peripheral surface is installed along the radial direction of the reaction tank, the lower end is formed with a transfer screw 17a on the outer peripheral surface of the reaction tank 11 The vertical extrusion screw rod (17) inserted into the vertical extrusion port (12) is extended coaxially, the upper end is composed of a rotary shaft 15 connected to the shaft (18a) of the drive motor (18).

If the die head (not shown) is attached to the lower side of the molten stirring part 10, a product having a predetermined shape can be molded.

When the polymer raw material in powder form or pellet form is introduced into the reaction tank 11 of the molten stirring part 10 together with a solvent and a filler, power is applied to the heater 14, and the reaction tank 11 is heated to The solvent dissolves the raw material while melting the raw material. In this state, when the driving motor 18 is rotated to rotate the rotating shaft 15 and the stirring blade 16, the molten raw material of the reaction tank 11 is stirred while flowing by the stirring blade 16. In this way, the molten raw material inside the reactor 11 is uniform in composition while stirring.

It is the role of the transfer screw 17a to prevent the low viscosity solvent from pouring down through the outlet 13. At the time of stirring, when the rotating shaft 15 is rotated in one direction, the feed force acts from the bottom up so that the raw material does not go down. On the contrary, when discharging, the viscosity is increased, so it must move to force the feed force. Therefore, if it is rotated in the opposite direction from stirring, the feed force acts from the top to the bottom to discharge the sample. The bidirectional drive motor 18 is used to adjust the rotation direction of the rotation shaft 15 as appropriate.

The raw material melt melted and dissolved in the reactor 11 and stirred in the uniform composition with the filler by the stirring blade 16 is introduced into the vertical extruder 12 to rotate in the vertical extruder 12. It is extruded out of the discharge port 13 by the feed screw 17a of the screw rod 17. In this process, the raw material melt is sufficiently melted in a homogeneous composition and is extruded under high density.

On the other hand, the solvent for dissolving the raw material of the polymer is volatilized into a gas by heat during melting the raw material, the solvent gas is discharged to the solvent discharge portion 20 and condensed into a liquid phase as described later solid polymer raw material It is recycled to dissolve it.

The solvent discharge unit 20, as shown in Figure 1, the gas discharge pipe 21 communicated with the upper end of the reaction tank 11, generated in the reaction tank 11 and discharged through the gas discharge pipe 21 A condenser 22 which collects the solvent gas and contacts the cooling tube 23 disposed therein to condense it into a liquid solvent, and a solvent storage tank 25 that stores and stores the liquid solvent condensed in the condenser 22. ) Reference numeral 24, not described, is a three-way valve.

According to a second embodiment of the polymer extrusion apparatus according to the present invention, as shown in FIG. 3, the vertical extrusion port is disposed horizontally below the vertical extrusion port 12 of the molten stirring part 10 of the first embodiment. It is characterized in that it is provided with the horizontal extrusion part 30 in communication with the discharge port 13 of (12).

As shown in FIG. 3, the horizontal extrusion part 30 has a substantially cylindrical body in which a horizontal extrusion hole 32 communicating with the discharge hole 13 of the vertical extrusion hole 12 is formed along the central axis direction. 31, an extrusion die head 33 provided at the front end of the body 31 and having a discharge port 33a coaxially communicating with the horizontal extrusion port 32, and a spiral feed screw 34a on the outer circumferential surface thereof. The slide is inserted into the horizontal extrusion port 32 of the body 31 and the rear end is composed of a horizontal extrusion screw rod 34 to which the drive motor 35 is connected.

Here, when the drive motor 35 is connected to the power source through the timer 36, the drive motor 35 rotates the horizontal extrusion screw rod 34 for a predetermined time while operating only for a predetermined time set in the timer 36. As a result, the raw materials can be quantitatively extruded through the outlet 33a of the horizontal extrusion port 32.

In addition, the horizontal extrusion screw rod 34 is gradually increased in diameter toward the front, the volume of the horizontal extrusion port 32 is gradually reduced toward the front. Therefore, the raw material conveyed by the horizontal extrusion screw rod 34 is pressurized to a higher pressure gradually toward the front, the higher the density, and the bubbles contained therein are pushed back and discharged to increase the density.

On the other hand, as shown in Figure 3, the extrusion die head 33 may be provided with various types of nozzles, for example, rods, tubes, T-shaped nozzles according to the shape to be molded.

As described above, according to the extrusion apparatus of the present invention, it is possible to manufacture a molded product with a small amount of raw material, and there is little raw material loss, and the extrusion screw rod is relatively short in length, so that the output of the motor can be reduced and economical. It is especially suitable for laboratories producing small quantities of various kinds.

And since the composition is sufficiently stirred until the composition is uniform and the viscosity is increased, it can be maintained at the desired composition, and various kinds of molding operations such as extrusion, injection, and reaction extrusion can be performed by one machine.

Claims (5)

The raw material is placed in the reaction tank 11, dissolved in a solvent, heated, melted, stirred to form a uniform composition, and then vertically extruded, and then melted in the raw material melting process. A polymer extrusion apparatus comprising a solvent discharge unit 20 for discharging the solvent gas to condense into a liquid solvent. According to claim 1, wherein the molten stirrer 10 is formed in a cylindrical shape to receive the raw material therein, the lower portion in communication with the vertical extrusion port 12 and the vertical extrusion port 12 in the vertical direction along the direction of the central axis. A reaction tank 11 having a discharge outlet 13 formed therein, a heater 14 provided on an outer wall of the reaction tank 11 to heat the reaction tank 11, and a vertical direction along a central axis direction of the reaction tank 11; A plurality of stirring blades 16 are disposed along the radial direction of the reaction tank on the outer circumferential surface, and a transfer screw 17a is formed on the outer circumferential surface on the lower end thereof and slides on the vertical extrusion port 12 of the reaction tank 11. Inserted vertical extrusion screw rod 17 is extended coaxially, the upper end is a polymer extrusion device, characterized in that consisting of a rotating shaft 15 connected to the shaft (18a) of the bidirectional drive motor (18). The horizontal extrusion part 30 of Claim 1 which has a horizontal extrusion part 30 arrange | positioned below the vertical extrusion port 12 of the said molten stirring part 10, and communicates with the discharge port 13 of the vertical extrusion hole 12. Polymer extrusion device, characterized in that. 4. The horizontal extrusion part 30 includes a substantially cylindrical body 31 having a horizontal extrusion hole 32 communicating with the discharge hole 13 of the vertical extrusion hole 12 through a central axis direction. And an extrusion die head 33 installed at the front end of the body 31 and having an outlet port 33a coaxially communicating with the horizontal extrusion hole 32, and having a helical feed screw 34a on the outer circumferential surface thereof. The polymer extrusion device, characterized in that consisting of a horizontal extrusion screw rod 34 is inserted into the horizontal extrusion port 32 of the body 31 and the rear end is connected to the drive motor 35. The polymer extrusion apparatus according to claim 4, wherein the driving motor (35) is connected to a power source via a timer (36) and rotates for a time set in the timer (36) to quantitatively extrude the molten raw material. .