JPS615906A - Method and apparatus for continuously preparing synthetic resin foam - Google Patents

Abstract

PURPOSE:To prepare economically a resin foam having excellent phisical properties and a desired form by composing an endless travelling belt for supplying and expanding foaming material of a flat making the bottom part and side plates inclining toward the outside at both upper side ends. CONSTITUTION:When expansible liquid is supplied continuously to a conveyor 1 travelling at a constant speed to prepare a foam 14 by making an expanding reaction on the conveyor 1, the endless travelling conveyor 1 is composed both of many continuous slats 3 to form the bottom surface section and continuous opposing plates 4, 4 which incline toward the outside with a desired interval at both side ends on each slat 3 or are raised so that they are inclined by the expanding pressure of the foam toward the outside. They provide long grooves 5 which open toward the outside on the upper section.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for continuously producing synthetic resin foam and to improvements in the production apparatus used therein.

Conventionally, as a means for continuously manufacturing synthetic resin foam such as rigid urethane foam, there is a bottom conveyor that runs at a constant speed, and a pair of side sections that run at the same speed as the bottom conveyor on the upper surface of both parts of the bottom conveyor. In combination with the conveyor, an upwardly U-shaped elongated receiving groove is formed, and a release paper made of kraft paper or the like folded along the elongated receiving groove is placed, and the bottom of the release paper is A method is adopted in which the foam is supported by a bottom conveyor and continuously sent forward, a foaming stock solution is continuously supplied onto the bottom of the release paper to cause a foaming reaction, and the foam is removed from the conveyor after foaming is completed.

However, the foaming pressure generated during the foaming reaction of the foaming stock solution of synthetic resin foam is extremely high (IILl to α5
~/-), large stresses will be exerted on the left and right side conveyors, and therefore conventional manufacturing equipment must be strong and maneuverable enough to withstand this large foaming pressure, requiring a rigid and highly complex It has the disadvantage that it is complicated to handle and requires a high level of skill, and is also very expensive, increasing the manufacturing cost of synthetic resin foam.
The dark side of a strong and large-scale side conveyor r#J'ii - Because it cannot be changed, when cutting and manufacturing synthetic resin foam molded to obtain insulation materials such as boards and pipe covers, the board , it is not possible to select the best size synthetic resin foam according to the size of the pipe cutter (-), and as a result, a large amount of cutting waste is generated, making the synthetic resin foam uneconomical and having no utility value. Lots of Wkl!!
There are economic disadvantages, such as the fact that it requires a lot of expense to dispose of IT waste. Furthermore, in conventional means, as the foaming stock solution expands upward as the foaming reaction progresses and rises along the side conveyor, near the boundary, physical effects such as friction cause significant bubbles to form in the late stage of foaming. Destructive power: There is a disadvantage in that it is generated by something that does not have practical physical properties.

This invention has been made to eliminate all of the above-mentioned drawbacks of the prior art, and provides an elaborate method for economically producing a synthetic foam of a desired shape having extremely excellent physical properties, and its use therein. The purpose is to provide a device for

The continuous production method for synthetic resin foam according to the present invention involves continuously supplying a foaming stock solution of synthetic resin foam onto an endless conveyor running at a constant speed, causing a foaming reaction on the conveyor to In a method for continuously manufacturing a foam, an endless running system consisting of a large number of continuous slats forming a bottom surface and continuous opposing side plates erected at both ends of each slat at a required interval. Using a conveyor, a foaming stock solution of synthetic resin foam is continuously supplied to the bottom of the long receiving groove formed by the slats and the side plate, and the foaming stock solution is poured out from the edge of the front conveyor. It is characterized by foaming so that the direction is inclined.
The method for continuous production of synthetic resin foam according to the present invention involves continuously supplying a foaming stock solution of synthetic resin foam onto an endless conveyor running at a constant speed, and causing a foaming reaction on the conveyor to form synthetic resin foam. In a method for continuously manufacturing a body, an endless running conveyor is constructed of a large number of continuous slats forming a bottom surface, and continuous opposing side plates erected at both ends of each slat at a required interval. The foaming solution of the synthetic resin foam is continuously supplied to the bottom of the elongated receiving groove formed by the slat and the side plate, and the foaming reaction is carried out while controlling the free upward foaming of the foaming solution. The invention is characterized in that the foaming is carried out in an inclined manner outward from the edge of the conveyor.

In addition, the continuous production apparatus for synthetic resin foam according to the present invention continuously supplies a foaming stock solution of synthetic resin foam onto an endless conveyor that runs at a constant speed, and causes a foaming reaction to occur on the conveyor to form synthetic resin foam. In an apparatus for continuously manufacturing bodies, the endless conveyor has a plurality of continuous slats forming a bottom surface, and a plurality of continuous slats on both ends of each slat with a predetermined spacing between the ends thereof. It is characterized in that it is composed of continuous opposing side plates that are erected so as to tilt outward due to the foaming pressure of the foam, and that the slats and the side plates form a long receiving groove that opens outward at the top. It is.

In addition, the continuous production apparatus for synthetic resin foam according to the present invention continuously supplies a foaming stock solution of synthetic resin foam onto an endless conveyor that runs at a constant speed, causes a foaming reaction to occur on the conveyor, and produces synthetic resin. In an apparatus for continuously manufacturing foam, a large number of continuous slats forming a bottom part;
An endless running conveyor is constructed with continuous opposing side plates installed at both end portions of each slat so as to be inclined outward at a required interval, or to be inclined outward due to the foaming pressure of the foam. and is characterized in that a loading device having a width that can be inserted into the elongated receiving groove is disposed at a predetermined position above the outwardly opening elongated receiving groove formed by the slat and the side plate. be.

Next, the present invention will be described in detail based on the accompanying drawings showing embodiments thereof.

In FIGS. 1 and 2, (1) is an endless running conveyor, which is installed at an angle of α5 to 6 degrees from the horizontal so that the end portion descends. The conveyor (1) has a large number of slats (made of metal plates, synthetic resin plates, wood value plates, etc.) fixed to a roller comparison table (2) with an attachment.
3), and a pair of continuous opposing side plates (4L (4 )
It consists of a long receiving groove with an outward opening at the top (5
) is being created. Endless traveling conveyor (1) H
The long receiving groove (5) moves in the direction of the arrow due to the operation of the driving tin rocket (7). It is configured with a mechanism to do so.

The side plates (4), (4) are made of metal, synthetic resin, wood value material, etc. to have the same width as the slat (3), and the distance between the opposing side plates on the slat (3) is It determines the width of the synthetic resin foam to be formed. The side plate (4L (4) is attached to the top surface of the slat (3) using removable fixtures (9) such as bolts and nuts, and is configured with a mechanism that allows the mutual spacing to be easily changed. It is now possible to easily produce a synthetic resin foam having a width of .

A long receiving groove (5) that comes into contact with the foaming stock solution of the synthetic resin foam from when it is supplied onto the conveyor until the foaming reaction is completed.
The inner surface of the mold release material made of film, vapor, etc. that does not allow the foaming solution of the synthetic resin foam to pass through is placed on the conveyor (
1) The synthetic resin foam, which has been mold-released and foam-molded using a means for continuously coating the starting end of It has a mechanism that allows it to be easily removed without being affected.

αυ is a discharge nozzle installed at a predetermined position above the starting end of the long receiving groove (5) to continuously supply the foaming solution of the synthetic resin foam to the bottom of the long receiving groove (5). The emitted iWlM liquid can be uniformly distributed in the width direction of the bottom of the long receiver (5) by using multiple units, or by discharging it from a long slit, or by moving the nozzle left and right. It is configured with a mechanism that distributes to (6)
is a transport roll for transporting the generated synthetic resin foam forward.

Note that the side plates (4), (4) are formed from a metal plate or a synthetic resin plate that deforms due to the foaming pressure generated during the progress of the foaming reaction of the foaming stock solution of the synthetic resin foam, and these are It is also possible to form an elongated receiving groove (5) which is vertically disposed on the upper surface and whose upper part opens outward following the foaming reaction of the foaming stock solution.

Further, a heat insulating material such as polyethylene foam may be pasted on the surfaces of the slats (3) and side plates (4L (4)).
By doing so, the thickness of the skin to be produced can be reduced and the use of an uneconomical foaming solution can be prevented.

In this way, with the drive sprocket (7) of the endless traveling conveyor (1) activated and the elongated receiving groove (5) running at a predetermined speed in the direction of the arrow, the elongated receiving groove (5) which has been subjected to mold release treatment is removed. 5) When a foaming stock solution of a synthetic resin foam such as polyurethane foam, polycyanurate foam, or phenolic resin foam is continuously supplied from the discharge nozzle αυ to the bottom of the chamber while uniformly distributing it, the foaming time is 10 seconds to 20 seconds.
A foaming reaction starts after approximately 0 seconds have elapsed, and the foam rises upward along the side plates (4), (4) which have been subjected to mold release treatment. After 30 seconds to a few minutes, the foaming reaction is completed, and the foam is sent forward by the conveyor (1), and after further progressing, it is separated from the conveyor, and is transported while being supported by the transport rollers to form the synthetic resin foam (+4). Obtained continuously.

In the above manufacturing process, the slats (3) and side plates (4), (4) that are in contact with the foaming stock solution (1) may be heated before the foaming stock solution (0) is supplied, or the foaming reaction is in progress. A heating device may be used for heating after heating.

As described above, according to the present invention, a long receiving groove for foaming the foaming stock solution is formed by a large number of slats fixed to a roller conveyor chain and a side plate that is removably installed on the slats. , the large and rigid side conveyors that were considered indispensable with conventional methods are completely unnecessary, and the manufacturing equipment has a simple and compact structure, low wire, and is extremely easy to operate and maintain. The manufacturing cost of the foam can be significantly reduced.

Furthermore, according to the present invention, since the width is regulated by the removable side plate, it is possible to manufacture a synthetic resin foam of a desired size very easily and at low cost, so that the foam can be used for boards, pipe covers, etc. When manufacturing the heat insulating material, it is possible to minimize the generation of cutting waste, thereby significantly reducing the manufacturing cost, and making it possible to make the most effective use of limited and limited resources.

In addition, according to the present invention, the foaming reaction proceeds while expanding the width of the foaming stock solution outward along the side plates that slope outward, and the bubbles also grow in the width direction, so that physical properties are not affected in any part. A synthetic resin foam with excellent performance and no knitting points can be obtained.

In addition, when foaming in a long receiving groove on a conveyor, bubble collapse and deformation tend to occur in the upper zone near the side plate, and when removing that area after foaming, If the foam is shaped so that it slopes outward, the amount of cutout can be kept to a minimum.

3(2) and 4 show embodiments of this invention. In the drawings, parts that are the same or similar to those described above are given the same reference numerals.

That is, (1) is an endless conveyor, (3) is a slat, (4) is a side plate, (6) is a long receiving groove, and α is a discharge nozzle. (to) is a loading device, which has a width that can be inserted into the long receiving groove (5) of the conveyor, and is placed on the upper surface of the foaming stock solution where the foaming reaction is progressing at a predetermined position above the conveyor (1). The mechanism is configured to control upward foaming at a speed slower than the foaming speed in free foaming. This loading device (A) is composed of, for example, a comparison chain and a large number of slats αη attached to it, and is stretched over a driving tin rocket and a driven tin rocket, and is directed in the same direction as the conveyor (1). It travels at the same speed as the conveyor chain (to), and is easily bent back and forth by the movement of the oil path of the conveyor chain (to), and its length is longer than the distance between the driving sprocket (to) and the driven sprocket α9, as shown in the figure. , it closely follows the shape of the upper surface of the foaming solution that changes moment by moment with the foaming reaction of the foaming solution for the synthetic resin foam.On the other hand, in the left and right direction, the slat (3) and the slat Qη do not deform due to their rigidity. The mechanism is such that a parallel state is always maintained. If necessary, horizontal holding means using rollers or the like may be used as an auxiliary means.

In this way, the endless traveling conveyor (1) and the loading device (to) are started and run in the direction of the arrow, and the foaming stock solution of synthetic resin foam (to) is delivered from the discharge nozzle (6) to the bottom of the long receiving groove (5). When it is continuously supplied without being uniformly distributed in the width direction, a foaming reaction starts after 10 to 200 seconds have elapsed. When the foaming reaction progresses to a final foaming ratio of 20 inches to 70 inches, the loading device is activated, and the foaming reaction further progresses while upward foaming is controlled. After 30 seconds to a few minutes, the foaming reaction is completed, and the foam is sent forward through the long receiving groove (5) and the loading device QFj, and then continues further.
It is separated from these and then transported while being supported by transport rollers (2) to continuously obtain synthetic resin foam a4.

FIG. 5 shows another embodiment of the present invention, in which the loading device (G) is placed at a predetermined position above the long receiving groove (5) that contacts the upper surface of the foaming stock solution during the progress of the foaming reaction. A large number of loading rollers (E) are arranged at appropriate intervals at the positions of , and foaming is controlled by the loading rollers so that the speed is slower than the speed at which the foaming stock solution (2) freely foams upward. The mechanism is configured to allow the reaction to proceed and to transport the generated synthetic resin foam forward. The loading roller (E) may be rotated in synchronization with the endless traveling conveyor (1) with or without a driving means, and is rotated in synchronization with the endless traveling conveyor (1), and the loading roller (E) rotates in synchronization with the endless traveling conveyor (1), and transfers the foaming stock solution in which the foaming reaction is progressing and the generated synthetic resin foam. On the other hand, the mechanism is designed to prevent the quality of the produced synthetic resin foam from deteriorating due to the use of abnormal stress due to the difference in the vertical movement speed. The loading roller holder, which constitutes the loading device, has a long receiving groove (5) so as to operate when the foaming reaction of the foaming stock solution has progressed to 20% to 70% of the final foaming ratio, as in the previous embodiment. It is located above the .

In addition, the members constituting the loading device, such as the slats αη and the loading roller blade, which the foaming stock solution Q3 comes into contact with during the foaming process, have been subjected to mold release treatment in the same manner as described above, and a heat insulating material is applied to the surfaces of these members. may be pasted.

According to the method and apparatus of the present invention described above, during the foaming reaction process of the foaming stock solution, when the exothermic reaction becomes large and the foaming speed rapidly increases as the internal temperature rises and the bubbles start to expand upward. Since the loading device is activated from the beginning and the foaming reaction progresses while controlling free foaming upwards, abnormal upward expansion of the bubbles is prevented, resulting in a synthetic resin with even better physical properties. A foam is obtained. Further, according to the method and apparatus of the present invention, since the loading device loads the foaming reaction before the shape is fixed while the foaming reaction is in progress, a synthetic resin foam having an excellent shape with a flat top surface can be easily obtained. It is possible to further significantly reduce cutting waste when manufacturing heat insulating materials and the like through secondary processing of this material, which has the effect of maximizing the use of limited and valuable resources.

[Brief explanation of the drawing]

FIG. 1 is a side view showing an embodiment of an apparatus for carrying out the method for manufacturing a synthetic resin foam of the present invention, and FIG. 2 is a cross-sectional view taken along line A-AI in FIG. FIG. 3 is a side view of a continuous production apparatus for synthetic resin foam showing another embodiment, FIG. 4 is a sectional view taken along line (B-B) in FIG. 2, and FIG. 5 is another embodiment of the present invention. In the drawing, (1) is an endless conveyor, (3) t′i slats, (4) is a side plate, (5) is a long receiving groove, and Qf9 is a loading device. Yes. Procedural amendment (spontaneous) 1 Indication of the case Japanese Patent Application No. 126611/1982 2 Name of the invention Continuous manufacturing method and apparatus for synthetic resin foam 3 Person making the amendment Relationship to the case Name of patent applicant Nichia Su Stock Company 4 Agent address 752-ku Marunouchi Pildging, 2-4-1 Marunouchi, Chiyoda-ku, Tokyo 100 Contents of amendment No. 126611/1989 1 Page 9 of the specification Lines 4 and 15 "Ki value ” to “woody”
Correct each. 2 On page 12, line 3, ``200 seconds'' is corrected to ``1,300 seconds,'' and lines 5 to 6, ``30 seconds to several minutes later,'' are corrected to ``100 seconds to 10-odd minutes later.'' 3 On page 14, line 7, "with the invention" is corrected to "of the invention." 4 On page 15, line 17, "200 seconds" is corrected to "300 seconds." 5 Same page 16, line 1: ``After 30 seconds or a few minutes, change J to ``100''.
After 10 seconds or more than 10 minutes, correct it to j.

Claims (4)

[Claims] (1) In a method of continuously producing a synthetic resin foam by continuously supplying a foaming stock solution of a synthetic resin foam onto an endless conveyor running at a constant speed, and causing a foaming reaction to occur on the conveyor, An endless running conveyor is used, which is composed of a large number of continuous slats that form the bottom part, and continuous opposing side plates that are erected at both ends of each slat at a required interval. Synthesis characterized by continuously supplying a foaming stock solution of synthetic resin foam to the bottom of the long receiving groove to be formed, and foaming the foaming stock solution in an inclined manner outward from the edge of the conveyor. Continuous manufacturing method for resin foam. (2) A method of continuously producing a synthetic resin foam by continuously supplying a foaming stock solution of a synthetic resin foam onto an endless conveyor running at a constant speed, and causing a foaming reaction on the conveyor, An endless running conveyor is used, which is composed of a large number of continuous slats that form the bottom part, and continuous opposing side plates that are erected at both ends of each slat at a required interval. The foaming solution of the synthetic resin foam is continuously supplied to the bottom of the long receiving groove to be formed, and the foaming reaction is carried out while controlling the free upward foaming of the foaming solution, and the foaming reaction is carried out from the edge of the conveyor. A continuous manufacturing method for synthetic resin foam, characterized by foaming in an outwardly inclined manner. (3) In an apparatus for continuously producing a synthetic resin foam by continuously supplying a foaming stock solution for a synthetic resin foam onto an endless conveyor running at a constant speed and causing a foaming reaction on the conveyor, The endless conveyor has a large number of continuous slats forming the bottom surface, and both end portions of each slat are inclined outward at a required interval, or are inclined outward by the foaming pressure of the foam. What is claimed is: 1. A continuous manufacturing apparatus for synthetic resin foam, characterized in that the slats and the side plates form a long receiving groove with an outwardly opening upper part. (4) In a device that continuously supplies a foaming stock solution for synthetic resin foam onto an endless conveyor that runs at a constant speed, and causes a foaming reaction on the conveyor to continuously produce synthetic resin foam, the bottom part is A large number of continuous slats forming,
An endless running conveyor is constructed with continuous opposing side plates installed at both ends of each slat at a required interval and inclined outward, or by the foaming pressure of the foam. and a loading device having a width that can be inserted into the elongated receiving groove is disposed at a predetermined position above the elongated receiving groove with an upper outward opening formed by the slat and the side plate. Continuous production equipment for resin foam.