KR20190063801A - A urethane foaming machine - Google Patents

Abstract

Disclosed is a mixing head for urethane foaming machine which is capable of improving mixing efficiency of liquid phase pigments with respect to an undiluted polyol main agent solution and undiluted isocyanate solution mixed in a reaction chamber of the urethane foaming machine to be sprayed to the outside of the urethane foaming machine. According to the present invention, a rotor assembly (600) is rotatably mounted on an end of a rotary shaft (410) extended from the motor (400), wherein the rotor assembly (600) includes an adaptor (610) into one side of which an end portion of the rotary shaft (410) can be inserted, a rotor (620) which is integrally coupled to the other side of the adaptor (610) by a screw coupling method, and an end cap (630) which is attached to a free end portion of the rotor (620), a plurality of stirring blades (624a, 624b, 624c, 624) are formed to protrude from a radially-shaped outer surface of the rotor (620), a main pigment passage (650) vertically extended along a longitudinal direction of the rotor (620) is formed in an inner central position of the rotor (620), a plurality of pigment discharge holes (626a, 626b) which is fluid-connected to the main pigment passage (650) are formed in a radially-shaped side wall of the rotor (620), and a pigment introduction passage (632) which is fluid-connected to the main pigment passage (650) is formed inside the end cap (630), and a third spray hole (702) which is formed in a free end portion of a pigment spray nozzle (700) is inserted into the pigment introduction passage (632).

Description

A URETHANE FOAMING MACHINE < RTI ID = 0.0 >

The present invention relates to the field of urethane emulsification, and more particularly, to a method of manufacturing a urethane emulsion which can improve the mixing efficiency of a liquid pigment with a raw liquid of a polyol subject to be mixed and injected in a reaction chamber of a urethane emulsion, The present invention relates to a urethane foamer which can easily mix pigments whose productivity is greatly improved.

Generally, urethane is a synthetic reaction product of a hydroxy compound such as a polyether polyol and an isocyanate, and can be regarded as a resin having a typical structure -NH-C-O-. The basic urethane foam-forming reaction is a reaction between a resin and a foaming reaction by a reaction between an isocyanate and a compound having an active hydrogen.

Typical molding technologies in the urethane industry are high temperature curing and low temperature curing technology. High temperature cured foam is similar in many respects to high density soft slab foam, whereas cold cured foam is similar to high density soft slab foam and is similar to natural rubber latex foam. The low-temperature curing molding is a recently developed technology, which has a rebound resilience of more than 60%, and the foam produced by this technology is also called a high-elastic foam. The low-temperature curing foam is produced by a low-pressure foaming machine or a high-pressure foaming machine, and since the foaming reaction is rapid, the discharge amount of the foaming machine must be sufficiently large.

The performance of the foaming machine is determined by two factors, the accuracy of the metering and the mixing efficiency. The accuracy of the metering means that a certain percentage of the components must be continuously transferred, and the mixing efficiency depends on how well the mixing head is It depends on what has been designed.

FIG. 5 shows a mixing head of a low pressure urethane emitter according to the prior art. 5, the low-pressure expanding machine conveys the raw fluids 1 and 2 at a low pressure without a large pressure, and is rotated rapidly by the motor 12 to smoothly mix the raw fluids 1 and 2 in the low- In order to improve the mixing efficiency in a short period of time, the rotating body 9-1 is rotated at a high speed, and a large number of projection-like rotary blades 9 -2) is used to increase the mixing efficiency by causing the polyol as the subject (1) and the isocyanate as the curing agent (2) to collide with each other as much as possible within a short time.

However, since the conventional mixing head of the low pressure urethane foam dispenser is required to replace the entire stirring head 20 when the stirring blade 24 is broken during use, there is a problem that the mixing head 20 is relatively expensive, It is impossible to adjust the interval or angle of the agitating blade 24 depending on the type and physical properties of the agitating blade 24, resulting in a problem that the efficiency of the work is greatly reduced.

FIG. 6 shows a mixing head of a low pressure urethane foam according to the prior art which solves this problem to some extent.

Referring to Figure 6, the mixing head 40 of the low pressure blower according to the prior art has a head body 42, a plurality of stirring rings 50 and a fixture 58, and a plurality of stirring rings 50, The stirring blade 54 is formed around the outer peripheral surface of the head main body 42 and is inserted into the head main body 42 to be engaged therewith and inserted around the head main body 42 so as to be positioned between the stirring rings 50 Spacers 56 can be used to adjust the spacing between the plurality of agitating rings 50.

That is, the mixing head 40 is a concept of replacing a rotating body of a single cylinder by a plurality of agitation rings 50 and spacers 56. The mixing head 40 is provided with a space between the agitating rings 50 and the spacers 56, There is a problem that the desired mixing efficiency can not be achieved due to the occurrence of fluctuation during high-speed rotation.

Korean Registered Patent No. 10-0853252 (Registered Date: August 13, 2008) Korean Registered Patent No. 10-0853251 (Registered Date: August 13, 2008) Korean Registered Patent No. 10-110907 (Registration date: January 17, 2012)

Disclosure of Invention Technical Problem [8] Accordingly, the present invention has been made in order to solve the problems of the prior art, and an object of the present invention is to provide a polyurethane- And to provide a mixing head for a urethane foamer capable of improving the efficiency.

In order to accomplish the above-mentioned technical problems,

A mixer head body having a hollow reaction chamber formed therein, a polyol feed nozzle and an isocyanate feed nozzle fixedly mounted on the side wall of the mixing head body, a motor disposed on the upper portion of the mixing head body, And a urethane discharge port for discharging the urethane foam,

A rotating shaft extending from the motor extends through the reaction chamber to a lower portion of the reaction chamber, and a rotor assembly is rotatably mounted at an end of the rotating shaft;

The rotor assembly includes a rotating shaft adapter having a rotating shaft insertion hole formed therein at one side thereof so that the rotating shaft end can be inserted therein, a rotor integrally coupled to the other side of the rotating shaft adapter by a screw coupling method, and an end cap attached to the free end of the rotor and;

A plurality of agitating blades protrude from a radially outer surface of the rotor, a main pigment passage extending perpendicularly to the longitudinal direction of the rotor is formed at an inner central position of the rotor, A plurality of pigment discharge holes are formed in fluid communication with the pigment passage, and a pigment introduction passage is formed in the end cap in fluid communication with the main pigment passage, and the pigment introduction passage is formed with a hole formed in the free end of the pigment spray nozzle And a third jetting port is inserted into the urethane foamer.

Wherein the nozzle adapter is detachably mounted to a lower portion of the urethane discharge port, the nozzle adapter has a funnel-shaped main body and a urethane discharge port extending vertically downward from the bottom of the main body by a predetermined length, A plurality of nozzle arranging holes are formed in a lower portion of the main body, the nozzle arranging holes are formed to penetrate a slanted lower portion of the main body so as to communicate with a space defined inside the main body, And a free end is inserted and arranged.

A bearing is disposed between the end cap and the lower portion of the body of the rotor so that the end cap maintains a static state that is not affected by the rotation of the rotor, A fixing protrusion is formed in the main body so as to extend in the vertical direction by a predetermined length, and the fixing protrusion is formed in the fixing protrusion, Is inserted into the through hole, the end cap is fixedly supported inside the main body.

Wherein when a stirring blade closest to the rotary shaft adapter is referred to as a first rotary stirring blade based on the rotary shaft adapter among the plurality of rotary shafts, a radial sidewall of the rotor at a position below the first row of stirring blades, Wherein the second row of stirring vanes is located on a radial sidewall of the rotor at a vertically downstream position of the first pigment discharge holes and the second row of stirring vanes is located at a position below the stirring vane of the second row, A third row of stirring vanes is located on the radial side wall of the rotor at a position downstream of the second pigment discharge holes in the radial sidewall of the rotor, The rows of agitating blades of the first embodiment are arranged at regularly spaced intervals.

As described above, according to the present invention, the main pigment passage is formed vertically in the rotating body of the mixing head for the urethane foamer and the pigment discharge holes communicating therewith are formed, and also in the adapter mounted on the lower portion of the rotating body, And the third injection port of the pigment spraying nozzle is inserted into the pigment introduction passage to inject the pigment to cause the pigment to flow in the reaction chamber of the urethane foaming machine so as to be mixed with the raw material of the polyol subject and the isocyanate The effect of improving the mixing efficiency of the liquid pigment can be obtained.

1 is a schematic cross-sectional view showing the structure of a mixing head for a urethane foamer according to a preferred embodiment of the present invention;
FIGS. 2 and 3 are views showing the structure of the rotor assembly shown in FIG. 1;
FIG. 4 is a view showing an operating state of the mixing head for the urethane foamer shown in FIG. 1; FIG.
5 and 6 show a foam head of a low pressure urethane foam according to the prior art.

BRIEF DESCRIPTION OF THE DRAWINGS The invention will be described in more detail with reference to the following illustrative drawings. In describing the present invention, a description of known functions or configurations will be omitted for the sake of clarity of the present invention. In addition, like reference numerals designate like elements throughout the specification.

The present invention relates to a mixing head for a urethane foamer in which a stock solution of a polyol subject supplied from a polyol reservoir and an isocyanate stock solution supplied from an isocyanate reservoir are selectively supplied by a liquid raw material supply cylinder and foamed together.

1 shows a structure of a mixing head for a urethane foamer according to a preferred embodiment of the present invention.

1, a mixing head for a urethane foamer according to a preferred embodiment of the present invention includes a polyol supply nozzle 100 having a structure that is selectively opened or closed according to a liquid raw material supply cylinder (not shown) (200). The polyol supply nozzle 100 and the isocyanate supply nozzle 200 are fixedly mounted on the side wall of the mixing head body 110 so as to face each other. A hollow reaction chamber 300 is formed in the mixing head body 110. Preferably, the reaction chamber 300 is formed to have a spherical inner surface.

The thus formed reaction chamber 300 is fluidly connected to the polyol feed nozzle 100 and is fluidly connected to the first injection port 102 formed at the free end of the polyol feed nozzle 100 and the isocyanate feed nozzle 200, (202) formed at the free end of the nozzle (200). The first injection port 102 of the polyol feed nozzle 100 and the second injection port 202 of the isocyanate feed nozzle 200 in the reaction chamber 300 are formed so that the polyol subject base liquid and the isocyanate base liquid, And is injected toward the inner surface of the spherical reaction chamber 300 while crossing each other at an inner central position of the chamber 300.

A motor 400 is disposed above the mixing head body 110 and a rotation axis 410 extending downward from the motor 400 passes through the spherical reaction chamber 300 and extends to the lower portion of the reaction chamber 300. [ do. The rotor assembly 600 is rotatably mounted at the end of the rotation axis 410 of the motor 400. The rotor assembly 600 is disposed over a lower portion of the reaction chamber 300 and a urethane discharge port 500 extending downward from a lower portion of the mixing head body 110.

A nozzle adapter 720 is detachably mounted to a lower portion of the urethane discharge port 500. The nozzle adapter 720 has a funnel-shaped main body 710 and a urethane discharge port 730 extending vertically downward from the bottom of the main body 710 by a predetermined length. A first female thread portion 511 is formed on the lower radial outer surface of the urethane discharge port 500 and a first female thread portion 714 is formed on the upper radial inner surface of the main body 710. The nozzle adapter 720 is detachably coupled to the lower portion of the urethane discharge port 500 by screwing the first male screw portion 511 and the first female screw portion 714 together.

A plurality of nozzle arranging holes 712 are formed at an inclined radial lower portion of the main body 710. The nozzle arranging holes 712 are formed in the main body 710 so as to communicate with the space S defined within the main body 710, As shown in FIG. The free end portions of the pigment spray nozzles 700 are inserted into the nozzle arrangement holes 712, respectively. The third injection port 702, which is formed at a free end of the pigment injection nozzle 700 and is formed to be selectively opened or closed according to a pigment supply cylinder (not shown), is connected to the rotor 620 And is inserted into the end cap 630 which is attached to the free end of the cap.

Figures 2 and 3 illustrate the structure of the rotor assembly 600.

Referring to FIGS. 2 and 3, the rotor assembly 600 includes a rotation axis adapter 610 having a rotation axis insertion hole (not shown) formed at one side thereof so that the end of the rotation axis 410 of the motor 400 can be inserted, A rotor 620 integrally fastened to the other side of the rotary shaft adapter 610 in a threaded manner, and an end cap 630 attached to the free end of the rotor 620. At this time, a plurality of stirring blades 624a, 624b, 624c, and 624 protrude from the outer circumferential surface of the rotor 620. The shape and arrangement interval of the stirring wings are set so as to maximize the mixing efficiency of the liquid raw materials.

A second male threaded portion 611 protrudes from the outer surface of the other end of the rotary shaft adapter 610. And a second female screw portion 622 is formed in the upper side of the rotor 620 in correspondence thereto. The adapter 610 and the rotor 620 are integrally fastened by screwing the second male threaded portion 611 of the rotary shaft adapter 610 to the second female threaded portion 622 of the rotor 620.

 At this time, when the stirring blade 624a closest to the adapter 610 is referred to as a first row stirring blade with respect to the adapter 610, the radial sidewall 624a of the rotor 620 at a position below the first row stirring blade 624a, A plurality of first pigment discharge holes 626a are formed. The first pigment discharge holes 626a are in fluid communication with the main pigment passage 650 extending vertically along the longitudinal direction of the rotor 620 at the inner central position of the rotor 620. [

The second row of stirring blades 624b is located on the radial side wall of the rotor 620 in the vertical downstream position of the first pigment discharge holes 626a and the rotor 620 is positioned below the second row of stirring blades 624b. A plurality of second pigment discharge holes 626b are formed in the radial sidewalls of the discharge cells. And the second pigment discharge holes 626b are fluidly connected to communicate with the main pigment passage 650. [ And the third row of stirring blades 624c is positioned on the radial side wall of the rotor 620 at a vertically downstream position of the second pigment discharge holes 626b.

In this manner, the pigment discharge holes and the stirring blades may be alternately arranged in several layers. Alternatively, as shown in the figure, the rows of the plurality of stirring blades 624 may be vertically arranged downstream of the stirring blades 624c of the third row They may be arranged at regular intervals. It will be readily appreciated by those skilled in the art that such a design of the arrangement of the pigment discharge holes and the stirring blades may be variously modified in consideration of the mixing ratio of the pigment to the mixture of the polyol subject undiluted solution and the isocyanate stock solution .

A bearing 640 is disposed between the end cap 630 and the lower portion of the main body of the rotor 600 so that the end cap 630 630 maintain a static state that is not affected by the rotation of the rotor 600.

A pigment introduction passage 632 is formed in the end cap 630 to communicate with the main pigment passage 650 of the rotor 620. The pigment introduction passage 632 is provided with a free end portion The third injection port 702 is inserted.

At the intermediate position of the end cap 630, a mounting flange 634 is formed to protrude horizontally outwardly of the end cap 630, and a through hole 635 is formed at a position near the free end of the mounting flange 634 do.

As described above, the nozzle adapter 720 is detachably mounted on the lower portion of the urethane discharge port 500. At this time, a fixing protrusion 716 is formed in the nozzle adapter body 710 by a predetermined length in the vertical direction The end cap 630 is fixedly supported in the main body 710 of the pigment spray nozzle 700 in such a manner that the end cap 630 is inserted into the through hole 635.

The operation of the mixing head for a urethane foamer constructed as described above will be briefly described below.

FIG. 4 is a view showing an operation state of the mixing head for the urethane foamer shown in FIG. 1;

4, in the head for a urethane foamer according to a preferred embodiment of the present invention, the ends of the polyol supply nozzle 100 and the isocyanate supply nozzle 200 are connected to each other in a reaction chamber 300 having a spherical inner surface. The polyol raw liquid and the isocyanate raw liquid supplied to the reaction chamber 300 according to the operation of the liquid raw material supply cylinder (not shown) cross each other in the inside of the spherical reaction chamber 300, . That is, the intersection point between the spray orientation of the polyol-subject undiluted solution and the spray orientation of the isocyanate stock solution may be implemented in the interior of the spherical reaction chamber 300 or the surface of the spherical reaction chamber 300.

The mixture of the cross-mixed polyol main subject solution and the isocyanate stock solution in the reaction chamber 300 continues to flow downward toward the urethane discharge port 500. At this time, the lower part of the reaction chamber 300 and the boundary position of the urethane discharge port 500 The pigment discharged through the first pigment discharge hole 626a and the second pigment discharge hole 626b of the rotor 600 is further mixed immediately downstream.

The free end of the pigment spray nozzle 700 is inserted through the nozzle arrangement hole 712 formed in the lower portion of the main body 710 of the nozzle adapter 720 and is further defined by the nozzle adapter 720 The third injection port 702 of the pigment injection nozzle 700 is inserted into the pigment introduction passage 632 of the end cap 630 in the space S so that the pigment injected through the third injection port 702 is filled with the pigment Passes through the introduction passage 632 and flows upward through the main pigment passage 650 of the rotor assembly 600 and then flows through the first pigment discharge hole 626a and the second pigment discharge hole 626b of the rotor 600 And is mixed with the rotating current of the mixture of the polyol-subject mixture and the isocyanate stock mixture formed by the plurality of stirring blades 624 by the centrifugal force generated as the rotor 620 rotates. Such a rotating current improves the mixing efficiency of the pigment.

The mixed solution to which the pigment is added to the polyol-subject undiluted solution and the isocyanate stock solution is further uniformly mixed by the stirring blades 624 while passing through the plurality of stirring vane units 624 to be mixed with the urethane discharge port 500 and the urethane discharge port 730, As shown in FIG.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the invention as defined in the following claims. It can be understood that it is possible.

100: polyol feed nozzle 110: mixing head body
102, 202, 702: jetting port 200: isocyanate feed nozzle
300: reaction chamber 400: motor
500: urethane discharge port 510: side wall
600: Rotor assembly 610: Rotation axis adapter
620: rotors 624a, 624b, 624c, 624: stirring wing
626a, 626b: pigment discharge hole 630: end cap
632: Pigment introduction passage 634: Mounting flange
700: pigment spray nozzle 710: main body
712; Nozzle placement hole 716: Fixing projection
720; Nozzle adapter 730: Urethane outlet

Claims (4)

A mixing head body 110 in which a hollow reaction chamber 300 is formed, a polyol supply nozzle 100 and an isocyanate feeding nozzle 200 fixedly mounted on the side walls of the mixing head body 110, And a urethane ejection opening (500) extending from a lower portion of the mixing head body (110), wherein the mixing head body (110)
A rotating shaft 410 extending from the motor 400 passes through the reaction chamber 300 and extends to a lower portion of the reaction chamber 300. A rotor assembly 600 is rotatably installed at a distal end of the rotating shaft 410 ;
The rotor assembly 600 includes a rotation axis adapter 610 having a rotation axis insertion hole formed therein at one side thereof so that the end of the rotation axis 410 can be inserted therein, 620) and an end cap (630) attached to the free end of the rotor (620);
A plurality of stirring blades 624a, 624b, 624c and 624 protrude from a radially outer surface of the rotor 620. A plurality of stirring blades 624a, 624b, 624c and 624 protrude from the rotor 620, A plurality of pigment discharge holes 626a and 626b are formed on the radial side wall of the rotor 620 in fluid communication with the main pigment passage 650, A pigment introduction passage 632 is formed in the end cap 630 in fluid communication with the main pigment passage 650. The pigment introduction passage 632 is provided with a nozzle hole 632 formed in the free end of the pigment injection nozzle 700, And a third jetting port (702) is inserted into the second jetting port (702). The nozzle adapter according to claim 1, wherein a nozzle adapter is detachably mounted on the lower portion of the urethane discharge port, and the nozzle adapter has a funnel-shaped main body, And a urethane discharge port 730 extending vertically downward by a predetermined length. A plurality of nozzle arranging holes 712 are formed in an inclined radial lower portion of the main body 710, The nozzle arrangement hole 712 is formed through the inclined lower portion of the main body 710 so as to communicate with a space S defined within the main body 710, And the end portion of the urethane foam is inserted and arranged. The rotor according to claim 2, wherein a bearing (640) is disposed between the end cap (630) and the bottom of the body of the rotor (600) so that the end cap (630) A mounting flange 634 is formed to protrude horizontally to the outside of the radial direction of the end cap 630 and the mounting flange 634 is formed to protrude radially outwardly of the end cap 630, A through hole 635 is formed at a position near the free end of the main body 710 and a fixing protrusion 716 is formed in the main body 710 by a predetermined length in a vertical upward direction and the fixing protrusion 716 is inserted into the through hole 635. [ And the end cap (630) is fixedly supported in the main body (710) by being inserted into the main body (635). The method as claimed in claim 1, wherein a stirring blade closest to the rotating shaft adapter (610) with respect to the rotating shaft adapter (610) among the plurality of stirring wings (624a, 624b, 624c, 624) The first pigment discharge holes 626a of the plurality of pigment discharge holes 626a and 626b are formed on the radial side wall of the rotor 620 at positions below the first row of stirring vanes 624a, And the second row of agitating blades 624b of the plurality of agitating blades 624a, 624b, 624c, and 624 is formed on the radial side wall of the rotor 620 at a vertically downstream position of the first pigment discharge holes 626a. And a second pigment discharge hole 626b of the plurality of pigment discharge holes 626a and 626b is formed on the radial side wall of the rotor 620 at a position below the second row of stirring vanes 624b , The radial side wall of the rotor (620) at a vertically downstream position of the second pigment discharge holes (626b) A third row of stirring vanes 624c of the first row of stirring vanes 624a, 624b, 624c and 624 and a plurality of stirring vanes 624a, 624b, 624c and 624 are located downstream of the third row of stirring vanes 624c. And the columns of the agitating blades (624) are arranged at equal vertical intervals.

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