JPH07124979A - Continuous production equipment of synthetic resin foam - Google Patents

Abstract

PURPOSE:To continuously manufacture foam with large crosssection by a method wherein liquid expandable resin is supplied onto a bottom face material under the condition that heating air is supplied in a tunnel-like construction work and the bottom face material and both side face materials are moved at the speed and the direction same as those of a horizontal conveyor in the construction work. CONSTITUTION:A heating air supplying means is provided below in a tunnel-like construction work 1, above which an air discharging means is provided. Below in the construction work, a horizontal conveyor 3 is arranged and, onto the inner surface of the construction work 1, vertical roller groups 4 and 6 consisting of a large number of rollers are rotatably arranged above the end of the conveyor 3 over the whole both side lengths. Further, a pair of side face materials 12 are arranged so as to come into contact with the opposing inner surfaces of both the roller groups 4 and 6 in order to be moved by the speed same as that of the conveyor 3. In addition, a bottom face material 16 is laid on the conveyor 3 so as to be sent out. Above the inlet side of the conveyor 3, a material mixing head 21 is provided movably to and from horizontally so as to mix and cast foam stock onto the bottom face material 16. After the completion of foaming, the side face materials 12 are reeled up to a reeler 24.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for continuously producing synthetic resin, for example, phenol resin foam.

[0002]

2. Description of the Related Art Generally, a phenolic resin foam is excellent in heat resistance and fire resistance and does not emit smoke or toxic gas when burned, and is therefore attracting attention as a fire resistant heat insulating material. Widely used in the field of various materials. Conventionally, as a method for producing this kind of foam, two endless belt conveyors provided in parallel in upper and lower two stages are continuously rotated at the same speed in opposite directions to form a foam curable liquid phenol resin. A method in which the composition is supplied onto a lower conveyor, foamed while moving on a belt conveyor, and the upper belt conveyor is brought into contact with the composition immediately before the completion of foaming, and the thickness of the foam is regulated and then cured. It has been known. In addition, the resole-type phenol resin foam excellent in water absorption and water retention is widely used as a Kenzan application for fresh flowers, that is, as a flower retaining material, but it is manufactured in a batch method in a relatively large block and cut by a cutting device. It is cut into roughly the size of a brick.

[0003]

By the way, in the conventional continuous production method, since the thickness of the foam produced is relatively thin, there is a problem that it is very inefficient and the productivity is low.
Further, the batch method is not suitable for mass production. The present invention has been made in view of the above situation, and an object thereof is to provide a highly productive manufacturing apparatus capable of continuously and stably manufacturing a foam having a large cross section.

[0004]

In order to achieve the above object, the present invention takes the following technical means. That is, the present invention, a tunnel frame, a horizontal conveyor provided inside, a pair of left and right vertical rollers consisting of a large number of rollers mounted on the frame and arranged on the horizontal conveyor, A heat insulating coating attached to the frame,
A lower surface material laid out on a horizontal conveyor and fed out, a pair of left and right side materials positioned inside the vertical roller group facing each other and moving in the same direction and at the same speed as the conveyor, and arranged at the lower part of the frame. It is characterized by comprising heated air supply means, exhaust means arranged in the upper part of the frame, and a material mixing head which is provided above the entrance side of the conveyor and supplies the material onto the lower surface material.

[0005]

According to the present invention, first, the air heated to a predetermined temperature is supplied into the frame by the heated air supply means, the inside of the frame is maintained at the optimum foaming temperature, and the horizontal conveyor is operated to operate the lower surface material. And both side materials are moved in the same direction and at the same speed as the conveyor, and a liquid material is supplied at a constant speed from the material mixing head onto the lower surface material on the entrance side of the conveyor.

The material supplied onto the lower surface material spreads in the width direction on the lower surface material to have a substantially uniform thickness, and when the foaming temperature is reached, the material is sequentially fired upward to a desired height (cross-sectional area). Then, it is cured, and then it exits the frame and is sent to the next cutting step. The side member regulates the width of the foam, and is peeled off from the foam and wound up when the foam hardens and comes out of the frame. The thickness of the foam is determined by the amount of liquid material supplied.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. In the drawings, reference numeral 1 is a tunnel-like frame, and an insulating wall 2 is attached to both left and right outer surfaces and an upper surface of the oven to form an oven wall, and a horizontal conveyor 3 composed of a slat conveyor is provided in the lower part of the frame 1. On the inner surface of the frame 1, a vertical roller group 4 consisting of a large number of rollers 4A over the entire length on the right side thereof is rotatably mounted on an end portion of the conveyor 3 via a mounting member 5.

On the inside of the left side of the frame 1, a movable vertical roller group 6 composed of a large number of rollers 6A facing the roller group 4 over the entire length thereof is mounted on a support table 7 fixed to the frame 1. A roller frame 9 is rotatably attached to a movable table 8 that is movable so that the distance between the roller frame 9 and the group 4 can be adjusted.
Can be moved back and forth with respect to the roller group 4 by a gap adjusting drive means 10 composed of a plurality of screw mechanisms.

Of the pair of left and right roller groups 4 and 6, the required number of rollers 4A and 6A at the exit side end and the entrance side from the central portion in the moving direction of the conveyor 3 are interlocked by the rotation driving means 11. The pair of left and right side members 12 arranged in contact with the inner side surfaces of the roller groups 4 and 6 in contact with each other are smoothly rotated so that the rotational speed thereof is the same as the moving speed of the conveyor 3. In addition, it surely moves at the same speed as the conveyor 3.

A material mixing head support frame 13 is erected on the entrance side front surface of the conveyor 3, and a lower surface material receiving plate 14 is provided in a lower portion of the frame 13 in an inclined shape with the conveyor 3 side lower. Feeding bases 15 for the side surface materials 12 are arranged on both left and right sides of the lower surface material receiving plate 14, and a feeding base 17 for the lower surface material 16 and the support guide roller 1 are provided in front of the lower surface material receiving plate 14.
8 is further provided, and the conveyor 3 of the support frame 13 is further provided.
A pair of left and right lower surface material guide rollers 19 are arranged at the side ends.

A head horizontal moving table 20 is provided on the upper part of the material mixing head support frame 13 so as to be movable back and forth and left and right, and a material mixing head 21 is attached to the lower part of the moving table 20 to attach the material mixing head 21 to the frame 13. Exhaust hood 22 above
And a duct 23 are provided. A liquid phenol resin, an acid curing agent, a foaming agent, a bubble-adjusting surfactant, a water-absorbing agent, etc. are supplied to the mixing head 21 through a supply pipe (not shown), and are mixed to form the lower surface material 16 at a predetermined speed. Flowed down.

The exit side of the conveyor 3 extends from the tunnel-shaped frame 1 by a predetermined length, and side material winders 24 are provided on both left and right sides thereof.
A roller conveyor 25, a cutting machine 26 for cutting the foam into a predetermined length, and a foam block unloading roller conveyor 27 are provided in parallel with each other at the exit side.

A blower 29 and a heat exchanger 30 are provided on the frame 1 near the entrance side of the conveyor 3 via a support 28.
An exhaust fan 32 is mounted from the center to the outlet side of the conveyor 3 via a support base 31, the outlet of the heat exchanger 30 is connected to the inlet of the blower 29, and the outlet of the blower 29 is used for oven heating. The heated air supply main duct 33 is connected.

The heat exchange medium inlet side of the heat exchanger 30 and the exhaust fan 32 inlet side are connected by an exhaust duct 34, and an external exhaust duct (not shown) is connected to the outlet side of the exhaust fan 32. Has been done. The exhaust duct 34 is connected to an exhaust collecting duct 35 that penetrates the ceiling wall of the frame 1 at seven locations and opens. The respective openings of the exhaust collecting duct 35 are provided at substantially equal intervals so that the exhaust in the oven, that is, the frame 1 is made uniform and the internal temperature is made uniform.

The main duct 33 for supplying heated air is guided to the lower outside of the frame 1 and connected to two branch ducts 36 and 37, and one branch duct 36 is guided into the frame 1 directly below the blower 29. It is connected to the front distribution duct 38 in the conveyor 3, and the other branch duct 37 is guided into the frame 1 directly below the exhaust fan 32 and connected to the rear distribution duct 39 in the conveyor 3. Has been done.

The distribution ducts 38 and 39 are located at the center of the width direction of the conveyor 3 and between the upper and lower slats and are arranged in parallel with the conveyor 3 over substantially the entire length of the frame 1. , 39 are provided with heating air outlets 40 in the middle of each opening of the exhaust collecting duct 35 and at equal intervals so that the temperature in the oven is optimized for foaming the material. There is.

The branch ducts 36 and 37 are each provided with a manual or automatic operation damper 41 for adjusting the air flow so that the temperature can be adjusted according to the temperature in the oven. A curtain (including an air curtain) (not shown) is provided on the inlet side and the outlet side of the oven, that is, the frame 1, so as not to hinder the movement of the material and the produced foam.
Is provided to facilitate temperature control in the oven.

Further, as shown in FIG. 4, a perforated plate 42 is provided above the heated air outlet 40 so that the blown heated air is uniformly distributed on the upper slats of the conveyor 3 in the width direction of the conveyor 3. To make the temperature uniform over the entire width. At this time, by appropriately changing the size or pitch of the holes of the perforated plate 42 in the width direction of the conveyor, the amount of air blown to the upper slats can be made uniform.

Further, as shown by a chain double-dashed line in FIG. 4, a distribution duct 4 having air outlets 43, 44 capable of directly supplying heated air between both vertical roller groups 4, 6 and the inside of the frame 1.
It is preferable that 5 and 46 are provided to make the temperatures of the foaming space S, especially the side surface material 12 and the lower surface material 17, uniform.

In the above embodiment, when foaming the material, the temperature of the foaming space S is raised to a predetermined temperature and maintained, and the conveyor 3, the vertical roller groups 4 and 6, and the winder 24 for the side material 12 are driven. The side surface material 12 and the lower surface material 17 are moved at the same speed as the conveyor 3, a weir is placed in an appropriate position on the lower surface material 17, and the mixed material is flowed down and supplied from the material mixing head 21 onto the lower surface material 17.

The material supplied onto the moving lower surface material 17 smoothly spreads outward in the width direction of the lower surface material 17 to have a uniform thickness over the entire width, and moves to the foaming space S to move its temperature. When the foaming temperature is reached and the foaming temperature is reached, the foaming sequentially expands and swells upward.
The side surface member 12 is peeled off from the foam and wound by the winder 24.

The foam produced in this manner is guided from the conveyor 3 to the cutting machine 26 via the roller conveyor 25, cut into a desired length into a large block, and sent out into a small block (brick). (About the same size as) and is conveyed to the molding (cutting) process. In the above embodiment, when changing the width of the foam, the movable vertical roller group 6 may be moved by the driving means 10 in the conveyor width direction. The present invention is not limited to the above-mentioned examples, can be appropriately modified in design, and can be used for producing synthetic resin foams other than phenolic resins.

[0023]

As described above, the present invention includes a tunnel frame, a horizontal conveyor provided inside the tunnel frame, and a large number of rollers attached to the frame and arranged on the horizontal conveyor. A pair of vertical rollers, a heat insulating coating attached to the frame, a bottom material laid out on a horizontal conveyor and fed out, and located inside the vertical rollers opposite each other in the same direction and at the same speed as the conveyor. A pair of left and right side members that move in the frame, heated air supply means arranged in the lower part of the frame, exhaust means arranged in the upper part of the frame, and upper part of the lower surface member provided above the entrance side of the conveyor. Since it is characterized by comprising a material mixing head for supplying the material to, the foam having a large cross-sectional area can be continuously and efficiently manufactured, and the generated gas is smoothly discharged. Homogeneous foam obtained efficiently and stably, can yield when molded into small blocks well, improved productivity and cost reduction.

[Brief description of drawings]

FIG. 1 is a plan view showing an embodiment of the present invention.

FIG. 2 is a front view of FIG.

FIG. 3 is an enlarged cross-sectional view taken along the line AA of FIG.

FIG. 4 is a cross-sectional view of essential parts showing another embodiment of the heated air supply means.

[Explanation of symbols] 1 frame 2 heat insulating material 3 horizontal conveyor 4 vertical roller group 6 vertical roller group 12 side material 17 bottom surface material 21 material mixing head 29 blower 30 heat exchanger 32 exhaust fan 33 heated air supply main duct 34 exhaust duct 35 exhaust Collecting duct 36 Branch duct 37 Branch duct 38 Distribution duct 39 Distribution duct 40 Air outlet

Claims (1)

[Claims] 1. A tunnel-shaped frame, a horizontal conveyor provided inside thereof, a pair of left and right vertical rollers composed of a large number of rollers attached to the frame and arranged on the horizontal conveyor, and the frame. A heat-insulating coating material attached to, a lower surface material laid out on a horizontal conveyor and fed out, and a pair of left and right side materials that are located inside opposite vertical roller groups and move in the same direction as the conveyor and at the same speed. A heating air supply means arranged in the lower part of the frame, an exhaust means arranged in the upper part of the frame, and a material mixing head provided above the entrance side of the conveyor and supplying the material onto the lower surface material. A continuous production apparatus for synthetic resin foams, which is characterized by comprising: