JPH0578403B2 - - Google Patents

Description

Detailed Description of the Invention (Industrial Field of Application) The present invention involves dispensing a foaming material, such as a foamable synthetic resin raw material, onto a base material and reacting and foaming it to form a composite plate of any shape within a predetermined time. , relates to an apparatus for continuously forming sanderch boards, etc. (Prior technology) Jikkosho is a device for manufacturing composite boards and heat insulating boards.
There are Publication No. 53-23744, Publication No. 17620 of Sho 59, etc. (Problems to be Solved by the Invention) When molding a foamed material using the above-mentioned apparatus, there are the following disadvantages. In other words, since the former device is manufactured by rotating a Caterpillar (registered trademark) type mold member, the entire device must be made sturdy, and the motor requires high horsepower.
Moreover, it is several times heavier than steel belts, etc., and on the other hand, the rotation speed is up to 10 to 15 m/min.
It is slow, consumes a huge amount of energy, and
This method not only has poor productivity and increased costs, but also has the disadvantage that the equipment is expensive. In addition, the latter device uses a steel belt mechanism and rotates at a forming speed of 30 to 40 m/min, which is faster than the former, but it has the disadvantage that it is impossible to manufacture composite plates with complex shapes because the mold member itself is a flat plate. It was hot. Furthermore, in the latter device, since the steel belt rotates, the steel belt will be difficult to bend unless the diameter of the pulley is large to a certain extent, so it is necessary to form the large diameter pulley to about 1 meter, and as a result, the entire device The disadvantage was that it was large and consumed a lot of energy. Furthermore, since all conventional devices are large in size, they have had the disadvantage that it takes approximately 1 to 1.5 hours to raise the temperature of the mold material to a predetermined temperature. (Means for Solving the Problems) In order to eliminate such drawbacks, the present invention uses an endless belt mechanism to form the reaction and foaming of the foaming material and the time when the foaming pressure reaches its maximum.
This is a foam material molding device in which the area for subsequent conveyance and curing is formed by a trochanter type consisting of a group of rolls. (Function) The endless belt mechanism reacts and foams the foam material raw material to form it into a predetermined shape, and the trochanter type conveys the foam material sent out from the mechanism as it is, cures it, and forms it into a predetermined shape. The upper part is sent into the factory in a nearly cured state, and then fed to a traveling cutter that cuts it into a predetermined length in the next process. (Example) Hereinafter, an example of the foam material molding apparatus according to the present invention will be described in detail with reference to the drawings. 1st
The figure is an explanatory diagram showing the outline of the above-mentioned apparatus, and 1 is supported by a foam material feeder so as to be movable up and down and left and right.As a specific example, for example,
It consists of a spray gun, a rotary blade, other discharge machines, etc., and sprays and discharges the foaming material 2, for example, a foamable synthetic resin raw material, onto the base material 3. 4 is a cure oven with endless belt mechanism 5 and trochanter mold 1
5, heaters 20 to 23, and a cover 24, it is used to mold the foam material 2 into a predetermined shape, and to send it out with a hardness that does not deform the original shape even when cut or cut. be. To explain further, the endless belt mechanism 5 includes upper and lower endless belts 6 and 7 (hereinafter simply referred to as belts) that move in the same direction while pressing and molding the foam material, and drive wheels 8 and 9 that engage these belts. It is composed of driven wheels 10, 11 and auxiliary wheels 13, 14 that support the belt in the region between the driving and driven wheels so as to form a predetermined gap, a so-called shape 12. In particular, the endless belt mechanism 5 is made of foam material 2
reacts and foams to fill the inside of the mold 12, and the foaming pressure is approximately at its maximum and is formed up to the region where it begins to decrease. This is the foam material 2 discharged onto the base material 3.
This is because the shape of the base material 3 is almost determined, and the adhesion between the base material 3 and the backing material to be described later is almost completed. In other words, the pressure corresponding to the endless belt mechanism 5 is up to this region A position, and the adhesion between the wood 3 etc. and the foam material 2 is also determined in this region. Moreover, in this region A, the board is held between the flat belts 6 and 7 while the foamed material 2 is in a soft state in order to perform the reaction and adhesion between the foamed material 2 in the middle of foaming, the base material 3, and the backing material under favorable conditions. This is due to the need to transport the material in a stable state without massaging it. In addition, auxiliary rollers 13, 14
This is to prevent the belts 6, 7 from being deformed by the foaming pressure, and is to ensure smooth movement of the belts 6, 7 and to maintain the air pressure of the mold 12 constant. Furthermore, the trochanter type 15 consists of an upper roller group 6 and a lower roller group 17, and the roller 1
The vertical distance T between 8 and 19 is the same as the distance between the upper and lower mold members of the mold 12, so-called belts 6 and 7.
Moreover, they are arranged on an extension line of the mold 12.
Further, the rollers 18 and 19 are arranged in the advancing direction so that the pitches become coarser from the exit of the endless belt mechanism 5 . To explain further, the trochanter mold 15 is a composite plate sent out from the endless belt mechanism 5 , especially the foamed material 2, which has already been formed into a predetermined shape and the foaming pressure has begun to decrease, but the foamed structure is still soft and in the process of curing. The foamed material 2 is apparently cured and sent out from the outlet to the outside of the cure oven 3, and the foamed material 2 is sent out as a core material between the base material 3 and the back material in a state that it is fixed together without peeling. I'll buy something to help you. Moreover,
The trochanter mold 15 can be used as a mold to transport the foamed material 2 while regulating its thickness without rubbing the foamed material 2 during transport. Note that the rollers 18 and 19 have a free roller structure, or may drive the upper and lower roller groups 16 and 17, or may drive the lower roller group 17 of the roller groups 16 and 17 and the upper roller group 16 as a free roller. and the roller group 16,
When driving both or one of the belt mechanisms 17, the speed is the same as that of the endless belt mechanism 5 .
The heaters 20 to 23 described above heat the endless belt mechanism 5 and the trochanter mold 15 to about 30 to 110°C.
It promotes the reaction and foaming of the foam material 2, performs necessary curing, and homogenizes the reaction system and foam structure of the foam material 2, which is a temperature-sensitive chemical reactant. In addition, when it is not necessary to install all of the heaters 20 to 23, the heaters 21 and 23 can be installed to effectively utilize thermal efficiency. Furthermore, the cover 24 functions to effectively utilize the heat of the cure oven 4 without releasing it to the outside air, and to exhaust combustion gas outside the factory. Incidentally, an opening through which a composite plate or the like passes is provided at the exit and entrance of the cure oven 4 . Reference numeral 25 denotes a backing material, for example, made of one or two layers of paper, thin metal, metal plate, etc., and a guide roller 26.
It is guided onto the base material 3 via the curing oven 4 and fed to the entrance of the cure oven 4 . 27 is a conveyor for feeding the base material 3 to the cure oven 4 . Reference numeral 28 is a running cutter for cutting the composite strip folded out from the outlet of the cure oven 4 into a regular length, and 29 is a feeder for sending the board cut into a regular length to the next process. Next, the operation of the foam material molding apparatus according to the present invention will be explained. Assume now that boards as shown in FIG. 2 are manufactured continuously using the apparatus shown in FIG. First, the foam material 2 is a raw material for polyurethane foam, the base material 3 is a metal plate shaped like a gutter, the back material 25 is aluminum asbestos paper, the ambient temperature of the cure oven 4 is 90°C, the endless belt mechanism 5 , and the trochanter. Rotating speed of type 15 to 30m/
min, and a double-width board S with a sandwich structure with a thickness of 15 mm is manufactured. Therefore, a base material 3 formed from a hoop material (not shown) by a molding machine (not shown) as shown in FIG.
7, it is continuously conveyed in the direction of arrow A. When the base material 3 arrives directly below the foam material feeder 1,
A foaming material 2, a so-called raw material for unfoamed polyurethane foam, is mixed by a conventional method and discharged onto a substrate 3. The discharged raw material exhibits the behavior in region B in FIG. That is, FIG. 4 is a measurement on the center line of the base material 3, and most of the raw material is discharged while being dispersed in the filling area, and the foaming pressure is measured on the backing material 25 in order to measure the foaming pressure on the backing material 25. It is zero in the area. Next, when the base material 3 reaches the position of the guide roller 26, the back material 25
It is guided upward, layered on the raw material that is in the process of foaming, and delivered to the mold 12. Then, the foam material 2 rapidly foams between the two members as shown in FIG. 5, and the foaming pressure increases accordingly.
At the same time, the gap between the base material 3 and the backing material 25 is filled with the foam material 2 as shown in FIG. At that point, it is delivered to trochanteric type 15 . Note that the foaming material 2 is filled into the void formed by the base material 3 and the backing material 25 at 110% of the amount used for a 35 kg/m ³ foam, and the maximum foaming pressure at that time is 180 g. / ^cm2 . This state is shown in the region A of FIG. In addition, in this area A, the foam material 2
Since the adhesion, foaming height, and filling state of the foaming material 2 are almost determined, the foamed material 2 in the middle of reaction and foaming can be transported without being rubbed, bonding more strongly, and the base material 3 and backing material 2 can be bonded more strongly.
There is no peeling from No. 5, and there is no cracking in the foamed structure, and it can be transported smoothly. Next, the board sent out from the exit of the die 12 of the endless belt mechanism 5 is conveyed in the direction of the arrow by the trochanter die 15 which regulates only the height and conveyance direction. The trochanter mold 15 cures the foamed material 2, and when it is sent out to the outside air from the outlet of the curing oven 4 , the foamed structure is hardened to the extent that it can withstand transportation and transport. Of course, the height regulating roller is a preliminary one, but it is more effective mainly in moving the board S smoothly within the mold without displacing it. The behavior of the foamed material 2 while moving through the trochanter mold 15 is shown in the region C of FIG. Next, the continuous band-shaped board S that has come out of the trochanter mold 15 is cut into regular lengths by a running cutter 28, and fed to a secondary forming machine (not shown) via a feeder 29, where it is cut into double-width sheets. The board is cut at the center and tongues are formed at the ends to form a board as shown in FIG. (Effects of the Invention) As described above, according to the foamed material molding device of the present invention, the molding device is adapted to the reaction and foaming characteristics of the foamed material. It is about half the price, can be made more compact, and consumes about 10 to 30% less energy than its predecessor.
Further, the board manufactured by the apparatus according to the present invention has no peeling between the foam material, the base material, and the back material, and
The foam structure also has the characteristic that it can be manufactured in the same way as in the past when the entire mold was manufactured using an endless belt mechanism.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing an example of a foam material molding device according to the present invention, FIG. 2 is a perspective view showing an example of a board manufactured by the above device, and FIG. 3 is a perspective view showing an example of a base material. , FIG. 4 is a characteristic diagram showing the behavior of the foamed material in the cure oven, and FIGS. 5 and 6 are cross-sectional views taken along the α-α line and the β-β line in FIG. 1. 1... Foaming material feeder, 3... Base material, 4 ... Cure oven, 5 ... Endless belt mechanism, 15
...trochanteric type.

Claims (1)

[Claims] 1 In an apparatus that continuously molds synthetic resin foam raw materials into a predetermined shape, the raw materials are discharged and then reacted and foamed in the same horizontal direction with a certain parallel gap to the area where the foaming pressure is maximum. 1. An apparatus for molding a foamed material, characterized in that a moving endless belt mechanism is provided, and a trochanter mold consisting of a large number of rollers arranged vertically so as to extend the parallel gap is provided behind the mechanism.