KR101882670B1 - Polyurethane foaming mixing head for promulgation correction of deformities by using ultrasonic - Google Patents

Abstract

The present invention relates to a foam molding mixing head, and more specifically, to a polyurethane foam molding mixing head using multiple ultrasonic waves, the polyurethane foam molding mixing head which enables a high quality molded article to be manufactured by improving a mixing head for simultaneously injecting molding raw materials and a foaming agent of polyurethane to manufacture a foam molding foam, thereby performing a foam molding process such that a foam article includes bubbles having independent sizes, and a molding foam occupied by the bubbles has a dense density and a uniform cross-sectional shape. To this end, the polyurethane foam molding mixing head of the present invention comprises: a head body in which a raw material supply port for supplying foam molding raw materials, a foaming agent supply port, and a discharge port are formed; a piston cylinder which is installed at one side of the head body to discharge respective mixed foam materials; and a supply control unit which is installed at the head body where the raw material supply port and the foaming agent supply port meet to adjust an inflow amount of the mixture towards the discharge port or block inflow thereof. A mixing ultrasonic wave generator for uniformly mixing the raw materials and the foaming agent to obtain a mixture and enabling the mixture to have a dense density by vibration of ultrasonic wave is installed at an intermediate point where the raw material supply port and the foaming agent supply port of the head body meet, and a raw material ultrasonic wave generator and a foaming agent ultrasonic wave generator are each provided at the raw material supply port and the foaming agent supply port to densely mix the raw materials and the foaming agent by refining the raw materials and the foaming agent when injecting the raw materials and the foaming agent.

Description

TECHNICAL FIELD [0001] The present invention relates to a polyurethane foaming mixing head for polyurethane foaming molding using multi-

The present invention relates to a mixing head for foam molding, and more particularly, to a mixing head for producing a foamed foam by simultaneously introducing a polyurethane forming raw material and a foaming agent so that the size and bubble of the independent foam of the foamed article And more particularly, to a mixing head for polyurethane foam molding using a multi-ultrasonic wave which is capable of producing a high-quality molded foam by performing foam molding so that the cross-sectional density of the molded foam becomes large and uniform.

Generally, foamed foam has many kinds of products such as sponge, styrofoam, and latex, which are widely used.

The foamed foam is used in a variety of fields such as packing boxes for agricultural and marine products, building panels, home appliances packaging materials, building interior materials, insulation materials and shoe sole. For example, polyurethane foam (PUF) A polyurethane foam is produced by mixing and reacting a foaming agent, a catalyst, a surfactant, and the like with isocyanate and polyol which are raw materials of urethane, reacting the foamed product with a soft or hard product in which the foaming agent is vaporized by reaction heat generated during the reaction Can be obtained.

The foamed foam is prepared by dissolving carbon dioxide in either or both of the resin side or the iso side of the isocyanate prepolymer-based microporous polyurethane foam formulation.

A method of manufacturing a polyurethane foam product is roughly divided into a low-pressure foaming method and a high-pressure foaming method. In the low-pressure foaming method, a raw material is supplied to a mixing chamber through a nozzle at a low pressure and then an impeller is rotated at high speed, And a method of injecting the material into a mold. In the high-pressure foaming method, a raw material is injected at a high pressure through a nozzle, mixed by an impingement force, and then injected into a mold.

The composition of the high-pressure blower is composed of a raw material tank (Tank), a pump (Pump), a mixing head and a driving hydraulic device, and an electric and electronic control device. The mixing head is a device for mixing and injecting foaming raw materials. Is the most critical part of the decision.

The mixing head includes a head body provided with a raw material supply port, a blowing agent supply port and a discharge port, a piston cylinder provided at one side of the head body for discharging the mixed foamed material, a raw material supply port and a foaming agent supply And a supply control unit installed at an intermediate point where the spheres meet to adjust and block the inflow amount.

That is, the raw material introduced into the raw material supply port in both directions of the head body is mixed with the foaming agent, the mixture is discharged to the discharge port side by the operation of the piston cylinder, and supplied to the mold side to be molded.

In the conventional mixing method in which the foamed foam obtained by foam molding on the molding mold side in the above manner is formed into the same basic formulation and has a uniform bubble structure and density but is merely mixed by the collision of the raw materials, Resulting in non-uniform forming foams.

From this point of view, since foamed foam generally has poor physical properties, there is a problem in that the quality of the product is low when the product is based on the test report card.

The present applicant has proposed a patent registration No. 10-1286906 (mixing head for polyurethane foam molding using ultrasonic waves (2013.07.10)) in order to solve the problems in the related art.

This will be described with reference to FIGS. 1 and 2. FIG.

A head body 10 provided with a raw material supply port 12, a foaming agent supply port 14 and a discharge port 18 for foam molding as shown in Figs. 1 and 2; A piston cylinder 20 for discharging the mixed foamed material and a head body 10 which is connected to the raw material supply port 12 and the foaming agent supply port 14 so as to adjust the inflow amount of the mixture to the discharge port 18 side And a supply control unit (30) for shutting down the mixing head

An ultrasonic generator 40 for uniformly mixing the raw material and the foaming agent and having a dense density due to the generation of ultrasonic vibration at a midpoint between the raw material supply port 12 and the foaming agent supply port 14 of the head body 10 So as to form a dense mixture of the raw material and the foaming agent.

As described above, the mixing head proposed by the applicant of the present invention allows the vibration wave oscillated in the ultrasonic wave generator to be finely bubbled and uniformized in accordance with the mixing of the foaming raw material and the foaming agent to make a cross-section of the foaming foam through the mold in a compact form It has an effect of being able to produce a molded foam which is resistant to impact and which requires durability.

However, since the conventional mixing head generates ultrasonic waves only in the middle portion where the raw material and the foaming agent are mixed by the single ultrasonic generator, uniform mixing and dense density may be lowered depending on the degree of fineness of the raw material and the foaming agent.

Disclosure of Invention Technical Problem [8] Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and an object of the present invention is to provide a mixing head for producing a foamed foam by simultaneously introducing a polyurethane forming raw material and a foaming agent, The present invention provides a mixing head for polyurethane foam molding using a multi-ultrasonic wave which is capable of producing a high-quality molded foam by foaming the densities of bubbles and the cross-sectional density of the formed foams occupied by the bubbles.

Another object of the present invention is to provide a method for producing a high-quality molded foam by forming a raw material and a foaming agent by ultrasonic wave in the step of injecting a raw material and a foaming agent, thereby forming a dense cross- And to provide a mixing head for polyurethane foam molding using a single ultrasonic wave.

A head body 10 provided with a raw material supply port 12 and a foaming agent supply port 14 for discharge molding and a discharge space 18 and a mixing space 16; A piston cylinder 20 disposed at one side of the discharge port 10 for discharging the mixed foamed material and a head body 10 provided with the raw material supply port 12 and the foaming agent supply port 14, 18. A mixing head for polyurethane foam molding, comprising a feed controller (30) for adjusting and shutting off the flow rate of the mixture to the side of the mixing head
A mixing ultrasonic generator installed at a midpoint between the raw material supply port of the head body and the foaming agent supply port to uniformly mix the raw material and the foaming agent and generate a dense density through generation of vibration by ultrasonic waves; A raw material ultrasonic wave generator provided at an inlet side of the raw material supply port and capable of finely mixing the raw material through vibration generated by ultrasonic waves when the raw material is supplied and densely mixing with the foaming agent; A foaming agent ultrasonic generator installed at an inlet side of the foaming agent supply port to refine the foaming agent through generation of vibration by ultrasonic waves during mixing of the foaming agent so that the foaming agent is densely mixed with the raw material; A first nozzle provided in the raw material supply port to inject the raw material into the mixing space where the raw material supply port and the blowing agent supply port meet and mix the raw material and the foaming agent into the mixed space by the raw material ultrasonic generator so as to supply the raw material without clogging; And a second nozzle provided in the foaming agent supply port to inject the foaming agent, which is refined by the foaming agent ultrasonic generator and is not clogged, into the mixing space where the raw material supply port and the foaming agent supply port meet and the raw material and the foaming agent are mixed,
Wherein the first nozzle provided in the raw material supply port and the second nozzle provided in the foaming agent supply port are provided symmetrically with respect to each other at an inclination angle of 5 ° to 30 ° so as to be symmetrically formed by the raw material ultrasonic generator, The raw material and the blowing agent are mixed with each other in the mixing space by the injection pressure and the inclination angle and then the raw material and the foaming agent are uniformly mixed by the vibration generated by the ultrasonic wave applied from the mixing ultrasonic generator, So that the mixture has a dense density.

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A mixing head for polyurethane foam molding using a multi-ultrasonic wave according to the present invention is a mixing head for polyurethane foam molding, which comprises a vibration wave generated by a multi-ultrasonic wave generator, which is made by mixing a foaming raw material, a foaming agent and a raw material with a foaming agent, Since the cross section of the foam can be formed in a dense form, it has the effect of being able to produce a molded foam which is resistant to impact and which requires durability.

1 is a sectional view showing a conventional mixing head for foam molding;
2 is a sectional view taken along the line AA in Fig. 1,
3 is a sectional view showing a mixing head for foam molding according to the present invention.
4 is an enlarged cross-sectional view of the main part of Fig. 3;

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, a mixing head for polyurethane foam molding using a multi-ultrasonic wave of the present invention will be described in detail with reference to the 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.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are intended to provide further explanation of the invention as claimed.

1, a head body 10 provided with a raw material supply port 12, a foaming agent supply port 14 and a discharge port 18 for foam molding, A piston cylinder 20 installed for discharging the mixed foamed material and a head body 10 provided on the head body 10 where the raw material supply port 12 and the foaming agent supply port 14 meet, And a supply control unit 30 for adjusting and shutting off the mixing /

3, uniform mixing of the raw material and the foaming agent by the generation of vibration of the ultrasonic wave at a midpoint between the raw material supply port 12 and the foaming agent supply port 14 of the head body 10 and dense density The ultrasonic wave generator 40 for mixing is installed in the mixing space 16 for mixing the raw material and the foaming agent,

Each of the raw material supply port and the blowing agent supply port is provided with a raw material ultrasonic wave generator 40-1 and a foaming agent ultrasonic wave generator 40-2 so that raw materials and foaming agent are made fine when the raw material and the foaming agent are introduced, .

The first nozzle N1 and the second nozzle N2 for injecting the raw material and the foaming agent are provided on the raw material supply port 12 and the blowing agent supply port 14 so as to be inclined with respect to each other, .

Specifically, the first nozzle N1 and the second nozzle N2 may be inclined at an angle of 5 ° to 30 ° and may be provided opposite to each other.

The raw material supply port 12 and the foaming agent supply port 14 are connected to each other by ultrasound waves generated by the raw material ultrasonic wave generator 40-1 and the foaming agent ultrasonic wave generator 40-2, And the raw material and the foaming agent are supplied to the first nozzle N1 and the second nozzles N2.

4, when the raw material and the foaming agent are introduced through the raw material supply port 12 and the foaming agent supply port 14, the raw material supply port 12 and the foaming agent supply port The first nozzle N1 and the second nozzle N2 are formed in a state in which they are primarily refined by the ultrasonic waves generated in the raw material ultrasonic wave generator 40-1 and the blowing agent ultrasonic wave generator 40-2 provided in the main body 14, To the mixing space (16).

At this time, since the first nozzle N1 and the second nozzle N2 are inclined and corresponding to each other, the raw material and the foaming agent discharged by the first nozzle N1 and the second nozzle N2 along the inclination The raw material and the foaming agent, which are primarily finely atomized, can be easily mixed by the injection pressure and the inclination angle of the first nozzle N1 and the second nozzle N2.

In addition, since the raw material and the foaming agent, which are first finely atomized by the ultrasonic wave, are supplied to the first nozzle N1 and the second nozzle N2 without being clogged when supplied by the first nozzle N1 and the second nozzle N2, It is possible to easily supply the raw material and the foaming agent and to prevent clogging of the first nozzle N1 and the second nozzle N2.

The ultrasonic wave generated by the ultrasonic wave generator 40 provided in the mixing space secondarily forms a mixture in a state where the raw material and the foaming agent are denser and finer.

The ultrasonic wave generator 40, the raw material ultrasonic wave generator 40-1 and the foaming agent ultrasonic wave generator 40-2 are provided with a vibrator (not shown), and a booster And ultrasonic waves having a frequency of 28 kHz are generated. The raw material ultrasonic wave generator 40-1 and the foaming agent ultrasonic wave generator 40-2 are respectively installed at the inlet side of the supply port through which the raw material and the foaming agent are supplied to further refine the raw material and the foaming agent to further increase the supply density, (40) is installed at a midway point where mixing of the foaming raw material and the foaming agent is performed so that the mixed raw material and the foaming agent are densely mixed to further increase the mixing density of the raw material and the foaming agent.

For reference, the micro vibration waves through the respective ultrasonic generators (40, 40-1, 40-2) generate motion action deep into the tissues of the foamed material, thereby making the tissue compact.

This is because the ultrafine vibration (ultrasound excitation) by the ultrasonic wave is equalized to the effect of making the bubble size before the foaming is made small to a relatively small size and the cross-section of the foamed foam is dense As a molding, the foamed foam produced by this method is particularly well suited for packaging materials that require durability and foam molded articles such as insulation and soundproofing materials.

The foam to be molded is mixed with the mold to be molded through the supply nozzle provided on the side of the discharge port 18 so that the foamed material to be supplied by the operation of the piston cylinder will have a uniform density It is possible to produce an expanded foamed foam having a cross section of the foam.

That is, even in the case of a heat insulating material that blocks external pressure and temperature, a product having uniform cross-sectional bubble densities has a stable function when applied to a product because the density of one of the bubbles is not biased.

The present invention is not limited to the above-described embodiment, but may be applied to other embodiments of the present invention as set forth in the appended claims. It will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention.

10: head body 12: raw material supply port
14: blowing agent supply port 16: mixing space
18:
20: piston cylinder 30: supply control part
40: Mixed ultrasonic generator
40-1: raw material ultrasonic generator
40-2: Ultrasonic generator for blowing agent

Claims (2)

A head body 10 provided with a raw material supply port 12 and a foaming agent supply port 14 for discharge molding and a discharge port 18 and a mixing space 16; A piston cylinder 20 for discharging the foamed material and a head body 10 to which the raw material supply port 12 and the foaming agent supply port 14 meet to adjust and block the flow rate of the mixture to the discharge port 18 side In a mixing head for polyurethane foam molding comprising a supply control section (30)
A mixer for uniformly mixing the raw material and the foaming agent and generating a dense density through the generation of vibration by ultrasonic waves, which is installed at a midpoint between the raw material supply port 12 of the head body 10 and the foaming agent supply port 14, An ultrasonic generator 40;
A raw material ultrasonic wave generator (40-1) installed at an inlet side of the raw material supply port (12) for finely mixing the raw material through generation of vibration by ultrasonic wave when the raw material is inputted and performing dense mixing with the foaming agent;
A blowing agent ultrasonic generator (40-2) installed on the inlet side of the blowing agent supply port (14) for finely mixing the blowing agent through generation of vibration by ultrasonic waves when the blowing agent is supplied, so that the blowing agent is densely mixed with the raw material;
The raw material supply port 12 and the foaming agent supply port 14 are brought into contact with each other to fill the mixing space where the raw material and the foaming agent are mixed, A first nozzle N1 provided in the nozzle 12;
The raw material supply port 12 and the foaming agent supply port 14 are brought into contact with each other to mix the raw material and the foaming agent into the mixing space to be infused with the foaming agent supplied without clogging by the foaming agent ultrasonic wave generator 40-2, And a second nozzle (N2) provided in the nozzle (14)
The first nozzle N1 provided in the raw material supply port 12 and the second nozzle N2 provided in the foaming agent supply port 14 are provided symmetrically with respect to each other at an inclination angle of 5 ° to 30 ° , A raw material primarily finely fined by the raw material ultrasonic wave generator 40-1 and a foaming agent primarily fined by the foaming agent ultrasonic wave generator 40-2 are injected into the mixing space 16 by an injection pressure and an inclination angle And mixing the raw material and the foaming agent uniformly by the vibration generated by the ultrasonic wave applied from the mixed ultrasonic wave generator (40) so that the mixture has a dense density. The polyurethane foam Mixing head for molding. delete

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