JPH0736744Y2 - Fusion machine - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention is intended to thermally bond a foam sheet made of a thermoplastic resin to a metal plate such as a steel plate or a zinc iron plate.
A heating device that is provided in the middle of the metal plate conveyance path to heat the metal plate, a sheet supply device that supplies a foam sheet made of a thermoplastic resin, and the foam sheet supplied by the sheet supply device. And a crimping device for crimping to the metal plate heated by the heating device.

In general, a steel sheet used as a roofing material, a heat insulating wall, or the like is used by adhering a heat insulating material to a steel sheet in order to add its heat insulating function, and then forming it into a predetermined mold by roll molding or the like.

The above-mentioned foam sheet is used as the heat insulating material, and as a method for adhering it to the steel sheet, a method using an adhesive or a method using heat is adopted. The foam sheet to be used has been improved to one that does not cause thermal strength reduction or breakage, and its performance has been improved, and since it is not necessary to use a solvent such as toluene, the foam sheet is a steel sheet. The method of thermally fusion bonding is becoming popular. The present invention relates to this thermal fusion machine.

[Prior Art] In a conventional fusion machine of this type, a hot-air stove as a heating device is provided in the middle of the conveyance path of the steel sheet, and the steel sheet is passed through the hot-air stove so that the temperature of the foam sheet is sufficient for fusion. The steel sheet is heated up to, and the foam sheet is supplied from the sheet feeding device so as to be superposed on the heated steel sheet, and the foam sheet is crimped to the steel sheet by the crimping device composed of a pair of upper and lower pressing rolls. Was configured into.

[Problems to be Solved by the Invention] However, in the fusing machine, the conveying speed of the steel sheet cannot be slowed in terms of fusing efficiency. Therefore, if you try to heat to a predetermined temperature when you leave the hot blast stove, the length of the hot blast stove in the steel sheet conveyance direction (furnace length) should be lengthened to lengthen the heating time in the hot blast stove. Or, in the case of shortening the furnace length, in order to increase the heat transfer efficiency of the hot air in the furnace, it is necessary to use high-performance combustors such as burners that generate hot air and blowers such as blowers. there were.

As a result, in the case of the former, the total length of the fusion machine is long because the length of the hot-blast stove itself is long, a large space is required to install the fusion machine, the equipment becomes large-scale, On the other hand, there is a drawback that the initial cost becomes high, while in the latter case, the combustion device and the air blower become expensive and the initial cost becomes high, and the fuel consumption and power consumption increase and the running cost also increases. There was a flaw.

Also, depending on the product to be obtained, such as when changing to change the uncoiler winding the steel plate or the winding roll winding the foam sheet, such as removing the eaves, foam When cutting a sheet to partially stick it in the steel sheet transport direction, the transport of the steel sheet must be temporarily interrupted.
As described above, in the hot blast stove, the hot air temperature is set to a temperature higher than the temperature to be obtained in order to reach the predetermined temperature at the exit location of the steel sheet conveyed, Due to the interruption of transportation, the steel sheet stays in the hot stove for a long time and is overheated, and when the transportation is restarted, the temperature of the steel sheet becomes significantly higher than the fusing possible temperature, and the foam sheet Has a drawback that it melts or bubbles inside expand and burst, resulting in defective products. Further, as disclosed in Japanese Patent Laid-Open No. 58-57952, the thin plate-shaped iron plate main body before being supplied to the crimping device is first heated by an infrared heating plate to about 150 ° C. and then secondarily heated by a burner. About 200-2
There was a technology to raise the temperature to 50 ° C, but since the final heating to a high temperature was performed by the burner, there was the drawback that the initial cost would increase and the running cost would increase in addition to the above. Further, there is a drawback that the problem of defective products caused by the interruption of the transportation of the thin plate-shaped iron plate body cannot be solved. In this known example, when the thin iron plate body is heated only by the infrared heating plate,
The heat transfer efficiency is high and the temperature responsiveness is excellent, and it is possible to quickly heat up to the fusion temperature for the foam sheet without taking a long metal plate transportation path, and it is possible to use a small facility and save the installation space. In addition, it does not need to be equipped with a high-performance blower such as a blower or a combustion device, both initial cost and running cost can be reduced, and a metal plate can be inexpensively and efficiently heated. Although there is an advantage that productivity can be improved by wearing, similarly, there is a drawback that the problem of defective products due to interruption of transportation of the thin plate-shaped iron plate body cannot be solved.

The present invention has been made in view of the above circumstances, and an object thereof is to make it possible to heat a metal plate inexpensively and efficiently, and to prevent problems caused by temporary interruption of the transportation of the metal plate. It is intended to prevent generation of non-defective products and to eliminate temperature unevenness in the plane direction of the metal plate.

[Means for Solving the Problems] In order to achieve such an object, the fusion machine according to the present invention is provided with an infrared radiation type heating device which is provided in the middle of a conveyance path of a metal plate and heats the metal plate. A fusion bonding device including a sheet supply device for supplying a foam sheet made of a thermoplastic resin, and a pressure bonding device for pressure bonding the foam sheet supplied by the sheet supply device to a metal plate heated by a heating device. In the machine, a shielding member is provided between the infrared radiation type heating device and a metal plate to which infrared radiation is radiated by the shielding member so as to be capable of displacing a part or all of the radiant infrared radiation and a state in which it is not occluded. A hot-air stove for temperature leveling that equalizes the temperature of the heated metal plate in the surface direction is provided between the mold heating device and the pressure bonding device.

The foam sheet, even if using a thermal decomposition type foaming agent, is produced by kneading a liquid and a thermoplastic resin in an extruder and a method called so-called extrusion foaming obtained by gasifying the liquid. It is also possible to use any material as long as it can be thermally adhered to a metal plate.

Further, as the thermoplastic resin forming the foam sheet, a polyolefin-based thermoplastic resin, particularly polyethylene, ethylene vinyl acetate copolymer, polypropylene or the like can be applied.

As the infrared radiation type heating device, a device provided with a surface combustion burner on the transportation path of the metal plate or a device provided with a panel heater can be adopted.

As the shielding member, a plate made of a heat insulating material such as ceramic is used, and the plate is horizontally displaced by an electric motor, an air cylinder, a hydraulic cylinder, or the like.

The temperature of the hot air stove is set to a temperature at which the foam sheet can be fused, such as 110 ° C., depending on the material of the foam sheet. Then, as the hot air stove, one having a configuration in which hot air heated to the above-mentioned fusing temperature by a burner, a heater or the like is blown is adopted.

[Operation] According to the fusion machine of the present invention, the metal plate on the conveying path can be heated by the radiant heat, and the radiant heat from the infrared radiation type heating device can be blocked by the shielding member. Moreover, by transporting the metal plate after being heated by the infrared radiation type heating device into the hot air stove, it is possible to maintain the temperature under a constant temperature condition and eliminate temperature unevenness in the plane direction of the metal plate.

[Embodiment] An embodiment of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a schematic view of a fusion machine according to an embodiment.

In the figure, reference numeral 1 denotes a steel plate as an example of a metal plate, which is configured to be fed from an uncoiler (not shown) wound in a roll shape and to be conveyed by a feeding device 2.

3 is a steel plate 1 that has been conveyed by the delivery device 2.
Is an infrared radiation type heating device that heats up to a predetermined temperature. The infrared radiation type heating device 3 is composed of a plurality of surface combustion burners 4 and the like arranged in parallel along the conveyance path of the steel sheet 1, and heats the steel sheet 1 by infrared radiation emitted from these surface combustion burners 4. It is configured.

Between the surface combustion burner 4 and the conveying path of the steel plate 1, a flat plate-shaped shielding member 5 for shielding radiant infrared rays is provided. Specifically, as shown in FIG. 2 and FIG. 3, the shield member 5 is composed of two shields which are horizontally driven by a drive mechanism such as the air cylinders 6a and 6b in a direction substantially perpendicular to the transport path. It is composed of members 5a and 5b.

Reference numeral 7 is a hot-air stove for temperature leveling, which makes the temperature of the steel sheet 1 heated by the infrared radiation type heating device 3 uniform in the plane direction. A gas burner 8 and a blower 9 are communicatively connected to the hot-air stove 7 via an air-blowing duct and an exhaust-air duct, which are not shown, and are configured to supply high-temperature gas heated by the gas burner 8 at a set temperature into the furnace. ing.

Reference numeral 10 is a foam sheet that is fused to the steel plate 1. Reference numeral 13 denotes a sheet supply device that supplies the foam sheet 10, such as a winding roll 11 that stores the foam sheet 10 in a wound manner, and a sheet feeding device 12 that sends the foam sheet 10 from the winding roll 11 and the like. It consists of

14 is the foam sheet 10 supplied from the sheet supply device 13.
A sheet cutting device for cutting the sheet into a predetermined length, 15 is a spotting device for spotting the end of the foam sheet 10 cut by the sheet cutting device 14 onto the steel plate 1. Reference numeral 16 denotes a crimping device for crimping the steel sheet 1 heated to a predetermined temperature and the foam sheet 10 and is composed of a pair of upper and lower pressing rolls.

In addition, non-contact radiation thermometers 17a and 17b for measuring the temperature of the steel plate 1 are provided respectively on the outlet side of the infrared radiation type heating device 3 and between the hot-air stove 7 and the crimping device 15. The temperature detection signals of these non-contact radiation thermometers 17a, 17b are sent to a control device (not shown) so that the heating temperature of the steel sheet 1 becomes an appropriate temperature for fusion bonding of the foam sheet 10. The temperature of the heating device 3 is controlled. Further, a temperature sensor 18 is provided in the hot air stove 7 and is configured to control the temperature in the hot air stove 7.

Next, the operation of the above fusion machine will be described.

In a normal operating state, the steel plate 1 delivered by the delivery device 2 is heated in the infrared radiation type heating device 3. At this time, the shielding members 5a and 5b are in the open state as shown in FIG. 3, and the steel sheet 1 is rapidly heated to the required temperature by the infrared radiation emitted from the surface combustion burner 4.

At this time, the shielding members 5a and 5b may be stopped at the positions shown by the chain line in FIG. 3 to shield the end portion of the steel plate 1. By shielding the end portions of the steel sheet 1 in this manner, it is possible to prevent the end portions of the steel sheet 1 from reaching a higher temperature than the central portion, and suppress uneven temperature of the steel sheet 1.

The steel plate 1 heated by the infrared radiant heating device 3 is conveyed to the hot air stove 7, and the steel plate 1 is passed while passing through the hot air stove 7.
The temperature in the surface direction of is flattened. The steel plate 1 discharged from the hot stove 7 is conveyed to the pressure bonding device 16.

On the other hand, the foam sheet sent from the sheet supply device 13
When the end of 10 reaches the spotting device 15, the spotting device
The end portion of the foam sheet 10 is spotted on the steel plate 1 by temporarily driving 15 downward as shown by the chain line in FIG.

The dotted foam sheet 10 together with the steel plate 1 is a crimping device
The composite material in which the foam sheet 10 is fusion-bonded to the steel plate 1 is formed by being conveyed to 16 and crimped, and further cooled by a cooling device (not shown) provided on the lower side of the crimping device 16. When the foam sheet 10 is delivered by a certain length, the foam sheet 10 and the steel plate 1 are temporarily stopped, and the cutting device 14 cuts the foam sheet 10. When the foam sheet 10 is cut, the steel sheet 1 is sent out a little, and then the end portion of the foam sheet 10 is sent out again to be pressure-bonded to the steel sheet 1 as described above. In this way, the foam sheet 10 having a constant length is sequentially pressed onto the steel plate 1.

On the other hand, when replacing the take-up roll 11 or foam sheet
As in the case of cutting 10, the shielding members 5a and 5b provided in the infrared radiation type heating device 3 are in the shielding state as shown in FIG. 2 while the steel plate 1 is temporarily stopped. Driven to. As a result, the infrared radiation emitted from the surface combustion burner 4 is shielded by the shielding members 5a, 5b, so that the steel plate 1 stopped in the infrared radiation type heating device 3 can be prevented from overheating.

The fusion machine heats the steel plate 1 having a thickness of 0.6 mm and a width of 762 mm to about 100 ° C. by the infrared radiation type heating device 3, and the temperature distribution in the plane direction of the steel plate 1 is set by the hot air stove 7 set at 110 ° C. Homogenized, the steel plate 1 has a thickness of 4 mm,
A polyethylene foam sheet 10 with a foaming ratio of 40 times speed 15
After bonding at m / min, not only during steady operation, but also when the steel plate 1 is temporarily stopped or restarted,
The temperature of the steel sheet 1 at the time of bonding with the foam sheet 10 is set to 110.
The foam sheet 10 can be kept at a temperature close to 0 ° C (110 ° C ± 5 ° C), the temperature of the steel sheet 1 does not fluctuate at the time of bonding, and the foaming sheet 10 can be melted without insufficient bonding or melting of the foaming sheet 10. It was possible to adhere well to the steel plate 1.

FIG. 4 is a plan view of the composite material thus obtained, and FIG. 5 is a partially omitted enlarged view thereof. The composite material shown in FIGS. 4 and 5 is, for example, a heat insulating roof material having a width of 762 mm and a length of 30 m in the longitudinal direction, and 500 mm at both ends in the longitudinal direction and 50 mm at one end in the width direction. Foam sheet 10 is fused in a state where there is an unattached portion, that is, a so-called partially attached state. The steel plate 1 thus obtained is folded along the longitudinal direction of the steel plate 1 to form a folded plate 1A as shown in the perspective view of FIG. 6, and these folded plates 1A ... As shown in the sectional view of FIG. 7, both end edges are overlapped with each other, and the foam sheets 10 are abutted against each other to form a roof in a continuous state.

In addition, in the fusion machine shown in FIG.
A device for applying an adhesive to the surface of the steel plate 1 may be provided between the infrared radiation type heating device 3 and the infrared radiation type heating device 3. By providing such an adhesive application device, the steel plate 1 and the foam sheet 10
It is possible to configure a dual-purpose machine capable of joining and by using an adhesive or heat fusion. That is, when joining the steel sheet 1 and the foam sheet 10 with an adhesive, the heating by the infrared radiation type heating device 3 is stopped, and the hot air oven 7 is a drying oven for drying the adhesive applied to the steel sheet 1. used. Then, the steel sheet 1 that has passed through the hot air oven 7 serving as a drying oven and the foam sheet 10 are pressure bonded by the pressure bonding device 16, so that the steel sheet 1 and the foam sheet 10 are bonded together.

[Advantages of the Invention] According to the fusion machine of the present invention, when the transportation of the metal plate is temporarily interrupted due to replacement of the uncoiler or partial attachment of the foam sheet, an infrared radiation type heating device is provided. Since a shielding member is interposed between the metal plate and the metal plate to block the transfer of radiant heat to the metal plate, it is possible to satisfactorily stop the heating of the metal plate in the transportation interrupted state, and to prevent overheating of the metal plate due to the transportation interruption. This can be avoided, and the occurrence of defective products can be prevented regardless of the temporary interruption of the transportation of the metal plate. Furthermore,
When the metal plate is in the transporting state, if the widthwise both side edge portions of the metal plate are shielded by the shielding member, the metal sheet is heated three-dimensionally, so that the widthwise both side edge portions of the metal plate become extremely hot. This can be avoided, and the occurrence of temperature unevenness of the metal plate can be suppressed, and the occurrence of defective products can be better prevented.

Moreover, since the temperature in the plane direction of the metal plate is leveled by the hot air stove, for example, with the heating by the infrared radiation type heating device, as described above, the three-dimensional heating causes the width direction of the metal plate. Even if the temperature of both edge parts becomes high, it is possible to eliminate the temperature unevenness in the metal plate taken out from the hot stove, avoiding partial fusion defects of the foam sheet, etc. Can be improved. Since the temperature of the metal plate in the plane direction is leveled by the hot air stove, for example, as described above, the three-dimensional heating causes the widthwise both ends of the metal plate to be accompanied by heating by the infrared radiation type heating device. Even if the temperature of the edge part becomes high, it is possible to eliminate the temperature unevenness in the metal plate taken out from the hot air stove and improve the quality by avoiding partial fusion defects of the foam sheet. it can.

[Brief description of drawings]

The drawing shows an embodiment of the fusion machine according to the present invention, and FIG.
2 and 3 are schematic views of the fusing machine, FIG. 4 is an explanatory view of the radiant infrared ray shielding member, FIG. 4 is a plan view of a steel sheet having a foam sheet fused, and FIG. 5 is a foam sheet. FIG. 6 is a perspective view of a folded plate, and FIG. 7 is a perspective view of a folded plate.
It is a sectional view of a roof formed by folding plates. 1 ... Steel plate as metal plate 3 ... Infrared radiation type heating device 5 (5a, 5b) ... Shielding member 7 ... Hot air oven, 10 ... Foam sheet 13 ... Sheet feeding device 16 ... Crimping device

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Creator Fumi Yasuhiko 1-18-12 Tsutohoncho, Nishi-ku, Osaka City, Osaka Prefecture General Chemicals Co., Ltd. (56) Reference JP-A-58-57952 (JP, A) Sho 53-25022 (JP, Y2)

Claims (1)

[Scope of utility model registration request] 1. An infrared radiation type heating device for heating the metal plate, which is provided in the conveyance path of the metal plate, a sheet feeding device for feeding a foam sheet made of a thermoplastic resin, and the sheet feeding device. A fusion bonding machine comprising: a pressure bonding device for pressure bonding the foam sheet supplied to the metal plate heated by the heating device, the infrared radiation type heating device and infrared radiation by the heating device. A shielding member is provided between the metal plate and the metal plate so as to be able to displace a part or all of the radiant infrared rays and a state where the radiant infrared rays are not blocked, and is heated between the infrared radiation type heating device and the pressure bonding device. A fusing machine, which is provided with a hot-air stove for leveling the temperature of the metal plate in the plane direction.