JPS6132976B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method suitable for substantially uniformly dispersing and filling a required amount of a liquid material into a wide range of building materials, for example in a factory.

Conventionally, when polyurethane foam having a width of 1000 mm and a thickness of 100 mm, for example, was continuously produced on a production line, it was generally done by traversing a pipe-shaped discharge opening. However, when the foam was formed by this method, there were disadvantages in the following points.

That is, since the mixed polyurethane foam raw materials are discharged while moving left and right according to the width, dead centers (points at which the discharge port stops moving) occur at both ends thereof. At this dead point, a part of the raw material exceeds a predetermined range (width) due to inertia, resulting in a disadvantage that resin economy deteriorates. Furthermore, since the discharge locus of the polyurethane foam raw material draws a zigzag straight line with repeated peaks and troughs, the filling results from non-uniform dispersion. In other words, there was a drawback that voids were generated on surfaces other than the discharge locus of the raw material. Moreover, if the peaks and valleys (pits) of the discharge trajectory are interposed, the production speed decreases, the density increases, and there is a disadvantage that the cost increases due to waste caused by scattering at both dead centers. Furthermore, in the case of the traverse method, there is a considerable time difference between the pitches, and when using the above-mentioned materials such as instant foaming, a large discrepancy occurs in the foaming speed and foaming height.
There was a drawback that the mechanical strength of the polyurethane foam itself was reduced due to unevenness in the foam structure. Also, the discharge amount is very small. For example, it has been almost impossible to uniformly disperse adhesive because, as mentioned above, gaps are formed between the pitches. In addition, when the above raw materials are dispersed and filled by traversing the spray gun or by distributing multiple spray guns, a circular discharge trajectory is formed although the outline is not very clear, so both ends of the diameter become densely distributed. , uniform discharge was difficult. In addition, the discharged liquid caused a lot of scattering and floated in the working environment, posing a serious problem in terms of health and safety.

In order to eliminate such drawbacks, the present invention discharges liquid in an arcuate trajectory with an almost clear outline, and by arranging a plurality of these, the liquid can be uniformly dispersed over a wide range. This paper proposes a method that enables filling.

The method for filling a wide range of liquid materials according to the present invention will be explained in detail below with reference to the drawings. Figure 1a,
b and c are longitudinal cross-sectional views showing one embodiment of a nozzle N used for carrying out the method of filling a wide range of liquid materials according to the present invention; The liquid material 2 supplied from the sides A and B is mixed under a certain pressure and speed and is sent out in the discharge direction. The mixed liquid material 2 is guided from its outlet 3 to an outlet path 4 that performs secondary mixing and pressure control of the mixture, and to a direction changing plate 5 with a smooth surface that collides with the end of this outlet path 4 at an appropriate angle. be. Furthermore, a discharge port 6 is provided at the end of the discharge path 4 for discharging the mixture outward at an appropriate pressure and speed.

To explain in more detail, the shape and cross-sectional area of the discharge port ₆ are directly related to the pressure, flow rate, and speed of the supplied mixture _. are substantially the same, and the liquid mixture is discharged in the form of a film (layer) without scattering in the direction of the arrow at the direction changing plate 5. In other words, the mixture collides with the direction changing plate 5 and tries to scatter, but since the mixture is always sent out from above at a constant pressure, they interfere with each other, and the mixture collides with the direction changing plate 5, so the mixture interferes with each other, and the mixture is scattered from the part where the pressure is weak, that is, the discharge port 6 without a wall. The pressure is considerably reduced compared to the pressure at the time of collision, and it is discharged in the direction of the arrow almost in a layered manner without scattering. Note that the edge of the direction changing plate 5 is formed into a pointed shape in order to prevent the mixture from going around to the back side. Furthermore, although FIGS. 1b and 1c are the same in principle as FIG. 1a, they show a case where the configuration is partially different. That is, figure b shows a case where there is no need to mix the liquid material 2, and is a nozzle that directly leads out the liquid material 2 fed by a pump (not shown) to the outlet path 4, and figure c shows a case where there is no need to mix the liquid material 2. A nozzle is shown in which the outlet 3 of the liquid supply part serves as the inlet of the outlet passage 4.
FIGS. 2a and 2b are a plan view and a side view showing the arcuate discharge locus c formed by the nozzle.
FIG. That is, as is clear from the figure, the liquid substance 2 (in this case,
This is a case where two arcuate discharge trajectories c (using a polyurethane foam raw material), so-called two nozzles, are arranged side by side, and the width of the member 7 is set to a width that allows sufficient dispersion and filling.

In the figure, L=720mm, H=15mm, =
360 mm, the speed when ejecting from the direction changing plate 5 is VO = 4 m/min, and the layer thickness of the mixture immediately after being discharged is approximately 1 mm, although this may be related to the foaming agent, and the dispersion filling is performed by the trajectory shown in the figure. do. Microscopically, the mixture that collides with the back surface of the member 7 is pulled somewhat in the direction of movement of the member 7 at the time of the collision, increases in volume at the same time as the reaction, and spreads radially due to foaming and the like. In the figure, the member 7 is moving in the direction of the arrow at a speed of 30 m/min, for example. Further, as the L and H of the member change, the nozzles N are arranged as shown in Fig. 4 a to d, and the nozzles are arranged so that the so-called arcuate discharge locus c of the liquid material is distributed, and the width is widened to produce a thin material. , thick-walled products can be manufactured. In other words, Fig. 4a shows a case where three nozzles N are arranged in parallel to manufacture a wide thin product.
Figures b to d show an embodiment in which the nozzles N are arranged in a so-called arcuate discharge trajectory c so as to manufacture a wide and thick product. That is, Figure b shows a case where four arcuate discharge trajectories c are arranged side by side, and three second-stage arcuate ejection trajectories _c1 are arranged in the gaps between these trajectories. Figure c shows a case where arcuate discharge trajectories c to _{c 2} are arranged in parallel in three stages, and are useful trajectories for manufacturing thick parts with a wide width. Fig. 4d shows a case where the arcuate discharge trajectory c is arranged in a stepwise manner.
Useful for dispersing and filling liquid materials thinly and with high density. Of course, a large number of nozzles N can be arranged according to the purpose.

Next, a case in which a construction panel is manufactured using the method according to the present invention will be described. For example, a case in which the panel is filled with a heat insulating material (polyurethane foam) will be explained.
A hoop material 8 made of a colored iron plate (thickness: 0.3 mm) is now coming out of the forming machine 9 in the shape shown in FIG. The nozzles N are arranged as shown in Fig. 2b, and the steel belts 10 and 11 of the heating and pressurizing device (mold temperature
70℃) rotates at a speed of 30m/min in the direction of the arrow.
It is assumed that kraft paper is used as the backing material 12. Therefore, for component 7, the OH value was 470 (mg-KOH/
g) Polyol A having three functional groups and general-purpose polyisocyanate B are mixed and discharged from the discharge port 6 of the nozzle N by a conventional method in the trajectory shown in FIGS. 2a and 2b. The discharged mixture reacts as soon as it falls onto the collar iron plate, and gradually foams.
After this, kraft paper 12 is laminated, and the reaction progresses from cream to gel to rise using this heating and pressurizing device.
It is sent out as a construction panel from the outlet. When we cut this construction panel and observed it, we found that the only non-uniform parts of the foam structure were the very thin, for example, skin layer that was in contact with the member 7, and the rest showed a uniform foam structure. was forming. 30x free foaming is approximately 28x, closed cell ratio is 96%
It was hot. Furthermore, when the polyurethane foam was peeled off from this member 7, traces of the polyurethane foam from the so-called adhesion surface were found to be uniformly dispersed over the entire back surface of the member 7. Further, the peeling force was 2 Kg/cm ² . In addition, there was almost no scattering other than the area filled with polyurethane foam, and no floating substances were observed in the working environment.

What has been described above is only one embodiment of the method for filling a wide range of liquid materials according to the present invention, and as shown in FIG. Arranging anti-firestone, glass beads, rock powder, and artificial aggregate,
It is also possible to manufacture a construction panel having the cross-sectional structure shown in FIG. 6a, so as to have a polyurethane foam inorganic particle-polyurethane foam distribution. That is, the polyurethane foam raw material is uniformly discharged over a wide width, and when foaming reaches a certain height of cream time, inorganic particles are scattered in a curtain shape, and the polyurethane foam raw material is dispersed and cured on top of the foam. It is also possible to place the cutter 14 as shown in FIG. 7 and divide it into pieces as shown in FIG. 6b using the cutter 14 as shown in FIG. 7, and use it, for example, as a mortar base plate. It also becomes much easier to manufacture architectural panels such as those shown in Figures 8a, b and c. That is, the eighth
Figure a shows a panel in which one surface of plywood 7 is coated with a waterproof coating layer 15, e.g., 0.2 to 1 mm thick, and a synthetic resin foam is laminated on top of that. It shows a panel with a waterproof layer, a low-density (foam-like) heat-insulating layer on top of the waterproof layer, and a medium-density decorative layer on top of that. Figure 8c
Instead of the inorganic particles, metal mesh, kraft paper, aluminum foil, polyethylene sheet, other release agents, etc. can be used. Furthermore, similar deformation of the arcuate discharge locus can be arbitrarily selected by changing L, H, and a.

Furthermore, whether the nozzle N is fixed and the member is moved or the member is fixed and the nozzle is moved is selected depending on the purpose.

As described above, according to the method of filling a wide range of liquid materials according to the present invention, the liquid material is in the form of a film,
Moreover, the plurality of arcuate discharge trajectories enable uniformly distributed filling of a wide member. In addition, in synthetic resin foams that react at high speed, the dispersion pattern and the formation of the foam structure of the foam are directly related, so there is an advantage that a remarkable effect appears on the mechanical strength. Furthermore, because it is discharged in the form of a film and has an arcuate discharge trajectory, there is no need to traverse the nozzle, and there is no waste due to liquid scattering or uneven filling, which greatly improves the working environment and resin economy. . Further, it has the feature that it can be easily adapted to the width of the member by changing the distance H between the nozzle and the member, the angle α of the nozzle, or increasing the number of nozzles.

Furthermore, since the liquid material can be discharged in large amounts to small amounts over a wide range, it is possible to easily manufacture everything from adhesive layers to thick heat insulating materials depending on the purpose.

[Brief explanation of the drawing]

Figures 1 a to c are explanatory diagrams showing an embodiment of a nozzle used for implementing the method of filling a wide range of liquid materials according to the present invention, and Figures 2 a and b are illustrations of filling a wide range of liquid materials according to the present invention. FIGS. 3 and 8 a to 8 c are longitudinal sectional views showing a construction panel manufactured by the above method, and FIGS. 4 a to d show important parts of the present invention. FIG. 5 is an explanatory diagram showing only the tip of a certain circular discharge trajectory; FIG. 5 is a schematic diagram showing an example of manufacturing a construction panel using the method of filling a wide range of liquid materials according to the present invention; FIG. FIG. 7 is an explanatory diagram showing an example of the arrangement of cutters. 2...Liquid material, 3...Outlet, 4...Leading path, 5...Direction conversion plate, 6...Discharge port, c...Circular discharge locus, N
…nozzle.

Claims (1)

[Scope of Claims] 1. A liquid material characterized in that when dispersing and filling a member etc. with a liquid material over a wide range, the liquid material is almost uniformly distributed and filled through a plurality of arcuate discharge trajectories. A method of filling a wide area. 2. A method for filling a wide area with a liquid material according to claim 1, wherein the liquid material is a heat insulating material, an adhesive, an additive, etc. 3. A method for filling a wide area with a liquid substance according to claim 1, in which either the member or the like or the arcuate discharge trajectory moves in a fixed direction.