KR101286906B1 - Polyurethane foaming mixing head for promulgation correction of deformities by using ultrasonic - Google Patents

Abstract

PURPOSE: A mixing head for foaming polyurethane using ultrasonic wave is provided to manufacture the cross section of a foam to be dense through a mold by micronizing and uniformizing bubbles according to the mixture of a foaming agent and a foaming material with the oscillating waves generated from an ultrasonic generator. CONSTITUTION: A mixing head for foaming polyurethane using ultrasonic wave comprises a head body (10), a piston cylinder, and a supply controller. For injecting a foaming material and a raw material, nozzles (N1,N2) are installed in a hole (12) for supplying the raw material and a hole (14) for supplying the foaming material of the head body. An ultrasonic generator (40) is formed for uniform mixture and uniform density of the raw material and the foaming material by generating ultrasonic vibration in a central point where the hole for supplying the raw material and the hole for supplying the foaming material meet. A vibrator is formed inside the ultrasonic generator. A booster generates ultrasonic wave with a wavelength of 28 kHz by being installed to operate the vibrator and allows the raw material and the foaming material to be mixed in the central point.

Description

TECHNICAL FIELD [0001] The present invention relates to a mixing head for polyurethane foam molding using an ultrasonic wave,

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 an ultrasonic wave which is capable of producing a high-quality molded foam by performing foam molding to obtain a uniform cross-sectional density of the molded foam.

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.

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 it is an object of the present invention to improve a mixing head for producing a foamed foam by simultaneously injecting a polyurethane forming raw material and a foaming agent, The present invention provides a mixing head for polyurethane foam molding using an ultrasonic wave in which the size of bubbles and the cross-sectional density of the formed foam occupied by the bubbles can be foamed and formed into a dense and uniform shape.

According to an aspect of the present invention,

A head body provided with a raw material supply port and a foaming agent supply port and a discharge port for foam molding; a piston cylinder installed at one side of the head body for discharging the mixed foamed products; and a head And a supply control portion provided on the body for adjusting and shutting off the inflow amount of the mixture to the discharge port side, the mixing head comprising:

An ultrasonic generator for uniformly mixing the raw material and the foaming agent and having a dense density due to the generation of vibration of the ultrasonic wave at the midpoint between the raw material supply port of the head body and the foaming agent supply port is provided so that the raw material and the foaming agent are densely mixed And can be achieved through a mixing head for polyurethane foaming molding using a configured ultrasonic wave.

The mixing head for polyurethane foam molding using ultrasonic waves according to the present invention is characterized in that a vibrating wave oscillated in an ultrasonic generator is made into fine bubbles due to mixing of a foaming raw material and a foaming agent and is made into a uniform state, It is possible to produce a molded foam which is resistant to impact and which requires durability.

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

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a preferred embodiment of the present invention will be described with reference to the accompanying drawings.

The present invention relates to a head body 10 having a raw material supply port 12 and a foaming agent supply port 14 and a discharge port 16 for foam molding and a head body 10 provided at one side of the head body 10, And a supply controller (not shown) installed in the head body 10 where the raw material supply port 12 and the foaming agent supply port 14 meet to regulate and block the inflow amount of the mixture to the discharge port 16 side 30. A mixing head for a conventional foam molding,

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.

In the drawing, nozzles N1 and N2 for injecting a raw material and a foaming agent are provided in the raw material supply port 12 and the foaming agent supply port 14, respectively, so as to be supplied.

The ultrasonic generator 40 is provided with a vibrator (not shown) inside and a booster (not shown in the drawing) for operating the vibrator. The ultrasonic wave generator generates ultrasonic waves having a wavelength of 28 kHz and mixes the foamable raw material and the foaming agent At the intermediate point where the mixing is carried out.

For reference, the micro oscillation wave generated by the ultrasonic generator 40 generates motion action deep into the tissue of the foamed material, thereby making the structure 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.

Usually, 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 16, so that the foamed material to be supplied by the operation of the piston cylinder will have uniform density of bubbles, 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.

It will be apparent to those skilled in the art that various changes and modifications may be made without departing from the scope of the invention as defined in the appended claims.

10: head body 12: raw material supply port
14: blowing agent supply port 16: discharge port
20: piston cylinder 30: supply control part
40: Ultrasonic generator

Claims (1)

A head body 10 provided with a raw material supply port 12 and a foaming agent supply port 14 and a discharge port 16 for foaming molding and a head body 10 provided at one side of the head body 10 for discharging the mixed foamed products And a supply control unit 30 provided in the head body 10 where the piston cylinder 20 and the raw material supply port 12 and the foaming agent supply port 14 meet to adjust and block the inflow amount of the mixture toward the discharge port 16 side In the mixing head (100) for foam molding,
Nozzles N1 and N2 for injecting a raw material and a foaming agent are provided correspondingly to the raw material supply port 12 and the foaming agent supply port 14 of the head body 10, And an ultrasonic generator 40 for uniformly mixing raw material and foaming agent and generating density by the generation of vibration of ultrasonic waves at a midpoint where the supply port 14 meets the ultrasonic generator 40. The ultrasonic generator 40 is equipped with a vibrator, Wherein a booster for operating the vibrator is installed to generate an ultrasonic wave having a wavelength of 28 kHz to mix the raw material and the foaming agent at a midpoint where mixing of the foaming raw material and the foaming agent is performed. head.

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