JPH089173B2 - Continuous production equipment for foam slabs - Google Patents

Description

TECHNICAL FIELD The present invention relates to an improvement of a foam slab continuous apparatus for continuously manufacturing foam slabs.

[Prior Art] Conventionally, a foam slab of a foam such as a polyurethane foam is continuously manufactured using an apparatus as shown in FIG.

Reference numeral 1 in the figure is a horizontally stretched conveyor belt. The conveyor belt 1 is driven and circulated by drive shafts 2a and 2b. A strip-shaped bottom sheet 3 is supplied onto the conveyor belt 1 from a winder roll (not shown), and is fed at the same speed as the conveyor belt 1. Further, side fences 4a and 4b are erected along both sides of the upper surface of the conveyor belt 1 substantially vertically to the surface of the conveyor belt. And the side fence 4
Band-shaped side papers 5a and 5b are respectively supplied from the winder rolls (not shown) on the facing surfaces of a and 4b, and are fed in the same direction as the conveyor belt 1 at the same speed. Instead of using the side papers 5a and 5b, the bottom paper 3
Alternatively, a paper having a large width may be used and both sides thereof may be bent before use. On the other hand, 6 is a nozzle for traversing the conveyor belt 1 in the transverse direction and supplying the foaming stock solution onto the conveyor belt 1. The nozzle 6 discharges a creamy foaming stock solution having a high viscosity.

To continuously manufacture, for example, a polyurethane foam slab using the above apparatus, as shown in FIG. 5, the conveyor belt 1, the bottom paper 3, and the side papers 5a and 5b are fed in the direction of the arrow in the figure, The polyurethane foam stock solution is discharged from the nozzle 6 while traversing the nozzle 6 in the direction of the arrow. Here, the polyurethane foam stock solution is composed of a mixed solution of polyol, tolylene diisocyanate, amine catalyst and the like, and these components are stirred by a mixing head and discharged as a foam initial stock solution. At this time, the undiluted foam solution is discharged onto the bottom paper 3 inviting the locus shown by the broken line in the figure.
While being transported in the direction of the arrow on the conveyor belt 1, it flows and spreads on the bottom paper 3 with a substantially uniform thickness. After spreading to a uniform thickness, as shown in FIG. 6, the polyurethane foam slab 7 is obtained by gradually foaming and rising on the bottom paper 3 and then curing.

[Problems to be Solved by the Invention] However, according to the conventional apparatus, when the polyurethane foam slab 7 is foamed and gradually rises, the rise at the side end portion is caused by the contact friction with the side fences 4a and 4b. Disturbed. As a result, a slab having a slightly higher central portion is obtained as shown in FIG. Also, the side fences 3a, 3
By pulling up b too much, a slab with a slightly lower center is obtained as shown in FIG. 8 (b). Although such a slab is improved as compared with the slab obtained without using the side fences 4a and 4b (shown in FIG. 7), it is not yet sufficient.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an apparatus for continuously manufacturing a foam slab capable of obtaining a slab having a flat upper surface as compared with a conventional one.

[Means for Solving the Problems] The present invention provides a conveyor belt that is continuously circulated in a certain direction, side fences that are erected along both side edges of the upper surface of the conveyor belt, and the conveyor belt. And a winder roll that supplies the side paper to the facing surfaces of the side fences, and the bottom stock while traversing in the width direction at the starting end of the conveyor belt. A nozzle that continuously discharges the film, a film supply roll that feeds a long bag on the side paper supplied on the facing surfaces of the side fences at the same speed as the side paper, and the film is inserted into the bag. And a guide jig arranged so as to pull up the bag body along the rise curve of the foamed stock solution, and the polyurethane foam before being hardened by being attached to the side fence. And a pressure roll for lightly compressing the chamber from above through the film,
Both sides are pulled up along the rise curve of the foaming stock solution by the bag body, and the polyurethane foam is lightly compressed through the film by the pressure roll at an arbitrary point immediately before the completion of the foaming reaction and before the curing. The purpose is to do.

In the present invention, the timing of pressurization by the pressure roll varies depending on the reaction rate, but it is effective to press at an arbitrary point immediately before or after the end of the foaming reaction.

[Operation] In the present invention, the pressure roll for lightly compressing the polyurethane foam before curing the pressure roll at a predetermined position of the side fence is detachably provided,
The surface of the uncured polyurethane foam having fluidity by lightly compressing the polyurethane foam through a film at an arbitrary point immediately before the completion of the foaming reaction using the pressure roll and before the curing. The convex portion is pushed toward the end side, and a foam slab having a flat upper surface can be obtained without raising both end portions and the central portion unlike the conventional case.

[Embodiment] An embodiment of the present invention will be described below with reference to FIGS. 1 to 3. However, the same members as those of the conventional device (shown in FIGS. 4 to 6) are designated by the same reference numerals, and the description thereof will be omitted.

Reference numeral 11 in the figure is a long bag. The bag body 11 is supplied onto the inner side surfaces of the side papers 5a and 5b by a supply roll 12 arranged outside the side fences 4a and 4b, and is discharged from the nozzle 6 to be brought into close contact with the undiluted foam liquid solution. . Inside the bag body 11, a guide jig 13 made of wire is inserted along the rise curve of the foamed stock solution. At predetermined positions of the side fences 4a, 4b, a pressure roll 15 that is lightly compressed through a film 14 of polyurethane foam before curing is detachably provided. This pressure roll
According to 15, the polyurethane foam is lightly compressed through the film at an arbitrary point immediately before or after the end of the foaming reaction. The outline shown by the chain double-dashed line in FIG. 3 shows the sag that occurs when the long bag 11 is not pulled up.

Thus, the device according to the above embodiment is a side fence.
It has a structure in which a pressure roll 15 for lightly compressing the polyurethane foam before curing at a predetermined position of 4a, 4b via a film 14 is detachably provided. Therefore, by slightly compressing the polyurethane foam through the film 14 at an arbitrary point immediately before the end of the foaming reaction using the pressure roll 15 and before curing, the polyurethane foam has fluidity and is not yet cured. The convex portion of the surface of the polyurethane foam is pushed toward the end side and flattened. In fact, a slab having a flat surface as shown in FIG. 9 is obtained.

[Effects of the Invention] As described in detail above, according to the present invention, it is possible to provide a continuous production apparatus for a foam slab that can obtain a slab having a flat upper surface as compared with the conventional one.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic perspective view of an apparatus for continuously producing a foam slab according to an embodiment of the present invention, FIG. 2 is a view of the apparatus taken along arrow A, and FIG.
1 is a partial sectional view taken along line XX of FIG. 1, FIG. 4 is a schematic perspective view of a conventional continuous foam slab continuous production apparatus, and FIG.
6 and 6 are explanatory views showing the manufacturing process of the foam slab using the same apparatus, respectively, and FIGS. 7 and 8 (a) and (b).
Are explanatory views of the foam slab by the conventional device, and FIG. 9 is an explanatory view of the foam slab by the device of the present invention. 1 ... Conveyor belt, 2a, 2b ... Drive shaft, 3 ... Bottom paper, 4a, 4b ... Side fence, 5a, 5b ... Side paper, 6
...... Nozzle, 7 …… Foam slab, 12 …… Long bag,
13 …… Guide jig, 14 …… Film, 15 …… Pressure roll.

Claims (1)

[Claims] 1. A conveyor belt which is continuously circulated and driven in a fixed direction, side fences which are erected along both side edges of an upper surface of the conveyor belt, a bottom paper is supplied onto the conveyor belt, and A winder roll that supplies side paper to the opposite surfaces of both side fences, and a nozzle that continuously discharges the foam stock solution onto the bottom paper while traversing in the width direction at the starting end of the conveyor belt, A film supply roll that feeds a long bag body on the side papers supplied to the facing surfaces of the both side fences at the same speed as the side papers, and the bag-shaped film is foamed by being inserted into the bag body. A guide jig arranged to pull up along the rise curve of the body undiluted solution, and a polyurethane foam attached to the side fence and before curing, filled from the top And a pressure roll for light compression via the bag body, and both sides are pulled up by the bag along the rise curve of the foaming stock solution, and at any point before the foaming reaction is completed and before curing. A continuous production apparatus for a foam slab, characterized in that the polyurethane foam is lightly compressed through a film by a pressure roll.