JP2003299939A - Device for pouring resin foaming raw liquid and method for manufacturing foaming resin molded body - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a device for pouring a resin foaming raw liquid certainly preventing a delivery of the insufficiently mixed resin foaming raw liquid into a mold at the time of starting of the delivery without highly increasing a manufacture cost of the foaming resin molded product; and a method for manufacturing the foaming resin molded product. <P>SOLUTION: The device for pouring the resin foaming raw liquid is provided with a head part for mixing a foaming polyurethane raw liquid; and a nozzle 2 connected to a tip end side of the head part 1 and delivering the foaming polyurethane raw liquid. The foaming polyurethane raw liquid delivered from this nozzle 2 collides to a collision part 4 provided on the nozzle 2 and is discharged. The method for manufacturing the foaming resin molded product is provided. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a resin foaming stock solution injection device and a method for manufacturing a foamed resin molded body.

[0002]

2. Description of the Related Art Conventionally, in the case of producing a foamed resin molding, for example, a foamed polyurethane molding, a polyol component containing a predetermined amount of a foaming agent and an isocyanate component are once stirred and mixed by a mixing head and prepared in advance. The mixed stock solution is discharged into the predetermined mold.

The resin foaming undiluted solution is vigorously discharged from a nozzle connected to and attached to the tip of the mixing head toward a mold, foaming progresses rapidly, and a foamed molded product suitable for a predetermined mold is formed. .

[0004]

However, the conventional nozzle for discharging the resin foaming stock solution is, as shown in FIG.
Since it is a straight tube toward the mold, if there is a deviation in the timing of mixing the foaming stock solution in the mixing head 11, only one stock solution previously introduced into the mixing head 11 is discharged from the nozzle 12. As a result, an unmixed undiluted solution having a composition deviating from a predetermined ratio may be sprayed and adhered to the inside of the mold, resulting in a non-uniform portion in the foamed resin molded product. As described above, when the ejection is started, the resin foaming undiluted solution is often ejected with insufficient mixing, which causes a problem that the portion becomes a defective portion and the yield is reduced.

In the two-liquid mixing type, it was difficult to avoid variations in the mixing ratio of the polyol component and the isocyanate component at the beginning of injection.

In view of the above-mentioned problems of the prior art, the object of the present invention is to provide a resin foaming undiluted solution that is insufficiently mixed at the start of discharge, etc., without causing a rise in the manufacturing cost of the foamed resin molding. It is an object of the present invention to provide a resin foaming undiluted solution injecting device and a method for manufacturing a foamed resin molded body, which can surely prevent discharging into a mold.

[0007]

The above objects can be achieved by the inventions described in the claims. That is, the characteristic configuration of the resin foaming stock solution injection device according to the present invention comprises a head section for mixing the resin foaming stock solution and a nozzle connected to the tip end side of the head section for discharging the resin foaming stock solution. The discharged resin foaming stock solution collides with a collision portion provided in the nozzle and is discharged.

According to this structure, the resin foaming stock solution discharged from the nozzle collides with the collision portion of the nozzle and is temporarily retained, so that the resin foaming stock solution discharged first does not mix. Even if the undiluted solution is sufficient, the undiluted solution ejected from the nozzle is eventually mixed due to the subsequent mixing with the undiluted mixed solution. Therefore, as in the prior art, even if the timing of mixing the foaming undiluted solution in the head portion is shifted, only one undiluted solution is ejected from the nozzle first, and the unmixed undiluted solution is sprayed. Therefore, it is possible to surely prevent the problem of adhesion to the mold. Moreover, since the structure of the nozzle only has the collision portion inside thereof, it does not cause a significant increase in equipment cost.

As a result, it is possible to surely prevent the resin foaming undiluted solution that is insufficiently mixed into the mold from being ejected into the mold at the time of starting the ejection without causing a rise in the manufacturing cost of the foamed resin molded body. Could be provided.

It is preferable that the collision portion is formed in a substantially L shape so that the resin foaming stock solution fed from the head portion is bent twice.

According to this structure, since the discharged undiluted solution collides with the collision portion and is forced to change its direction twice,
Since the undiluted solution is surely temporarily retained inside the nozzle to promote the mixing and has a simple structure, it is convenient because the internal cleaning can be easily performed after the discharge is completed.

Further, the characteristic constitution of the method for producing a foamed resin molded article according to the present invention is that the resin foaming undiluted solution injection device is used to discharge the resin foaming undiluted solution to produce the foamed resin molded article. To do.

According to this structure, it is possible to reliably prevent the insufficiently mixed resin foaming undiluted solution from being discharged into the mold at the time of starting discharging, without causing a rise in the manufacturing cost of the foamed resin molded body. A method for manufacturing a molded body can be provided.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 shows a resin foaming stock solution injection device according to the present embodiment. This resin foaming stock solution injecting device is a mixing head section (corresponding to a head section) for mixing a resin foaming stock solution, for example, a foaming polyurethane stock solution.
And a nozzle 2 which is connected to the tip end side of the mixing head portion 1 and discharges the polyurethane foam stock solution.
Further, a factory air pipe (not shown) is connected between the mixing head portion 1 and the nozzle 2, and a cleaning solvent is vigorously sprayed into the nozzle 2 by using compressed air or the like for solvent cleaning. The flushing device 3 is attached. It should be noted that the mixing head part 1 is adapted to feed the resin foaming stock solution to be mixed, but the piping and the like for this are omitted from FIG.

Unlike the conventional nozzle, this nozzle 2 is, as shown in FIG. 1, the discharged polyurethane foam stock solution colliding with a collision portion 4 formed inside the nozzle, and after being bent, the nozzle 2 is discharged. It is designed to be discharged from the tip. That is, the collision part 4 is formed in a substantially L-shape so that the foamed polyurethane stock solution fed from the mixing head part 1 is bent twice inside. Since the collision part 4 is configured in this way, the polyurethane foam stock solution fed from the mixing head section 1 at the earliest stage remains as it is, even if it is in an insufficiently mixed state, that is, only one stock solution. In this state, it collides with the collision part 4 without being discharged from the nozzle 2, and as a result of changing the direction twice, the discharge is temporarily stopped and stays. It is delivered and mixed. Therefore, it is possible to reliably prevent the problem of the prior art, that is, the phenomenon that the unmixed stock solution is sprayed and adheres to the inside of the mold.

However, the shape of the collision portion 4 is not limited to the substantially L-shape shown in FIG.
It is not necessary to form the polyurethane foam undiluted solution sent from the tank for a short period of time for a short time, and it is not necessary to form the right angled shape as shown in FIG. The shape may be an arc shape, the tip of the nozzle may be branched into two or more, or may have another shape. From the viewpoint of ease of cleaning the inside after use, it is preferable that the shape of the collision portion 4 is the L-shape shown in FIG. 1 or a simple shape inclined to this by an obtuse angle.

[Other Embodiment] (1) The production of the foamed resin molded product of the present invention is not limited to the case where the resin foaming undiluted solution is injected into the fixed mold, and the foamed resin molded product is formed by a continuous line. It can also be applied to the case of manufacturing.

(2) The L-shaped collision portion shown in FIG. 1 shows an example in which each corner is formed at a substantially right angle, but even if each corner is rounded inward, it may be concave. Good.

[Brief description of drawings]

FIG. 1 is a schematic front configuration diagram of a resin foaming stock solution injection device according to the present invention.

FIG. 2 is a schematic front view of a foaming stock solution injection device according to a conventional technique.

[Explanation of symbols]

1 head 2 nozzles 4 collision part

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Hagi             1-17-18 Edobori, Nishi-ku, Osaka City, Osaka Prefecture             Toyo Tire & Rubber Co., Ltd. (72) Inventor Kiyo Shiro             1-17-18 Edobori, Nishi-ku, Osaka City, Osaka Prefecture             Toyo Tire & Rubber Co., Ltd. F-term (reference) 4F204 AA42 AG20 EA01 EE16 EF01                       EF23 EL04                 4G035 AB36 AB54 AC12

Claims (3)

[Claims] 1. A head section for mixing a resin foaming stock solution, and a nozzle for discharging the resin foaming stock solution, which is connected to a tip end side of the head section, wherein the resin foaming stock solution discharged from the nozzle is the nozzle. An apparatus for injecting a resin foaming undiluted solution, which is adapted to collide with a colliding portion provided in a container and be discharged. 2. The resin foaming stock solution injection device according to claim 1, wherein the collision section is formed in a substantially L-shape so as to bend the resin foaming stock solution fed from the head section twice. 3. A method for producing a foamed resin molded body, which comprises producing a foamed resin molded body by discharging the resin foaming undiluted solution by using the resin foaming undiluted solution injection device according to claim 1.