JPH0539879Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The invention is equipped with a crimping device that crimps a foam sheet made of thermoplastic resin and a heated metal plate such as a steel plate or a galvanized iron plate. Regarding fusion machines.

Generally, steel plates used as roofing materials, insulating walls, etc. are used by bonding a heat insulating material to the steel plate in order to add its heat insulating function, and then forming it into a predetermined shape by bending or the like.

The above-mentioned foam sheet is used as a heat insulating material, and the method of adhering it to the steel plate is either using an adhesive or thermally. The performance of the foam sheet has been improved by improving it so that it does not cause a decrease in strength or destruction due to heat.
Furthermore, since it is not necessary to use a solvent such as toluene, a method of thermally fusing a foam sheet to a steel plate has come into widespread use. This idea is
The present invention relates to a fusion splicer that thermally fusions the fusion.

[Prior art] In this type of fusion machine, it is necessary to cool the metal plate after crimping the foam sheet onto the metal plate. Nozzles were installed in parallel to spray water.

[Problem to be solved by the invention] However, since the crimping position by the crimping device and the cooling position for the metal plate are far apart, the foam that becomes the fused surface to the metal plate is formed after crimping and before cooling. Not only the skin layer of the body sheet but also the bubble layer is heated to high temperatures, and the air inside the bubbles expands and the bubbles are destroyed, and adjacent bubbles connect to each other, creating what is called a bulge. As a result, cracks occur continuously in the longitudinal direction of the metal plate, resulting in defective products and poor product yield.

In addition, as the heating temperature of the metal plate increases, the above-mentioned defective products are more likely to occur, so with conventional configurations, the upper limit of the heating temperature of the metal plate must be lowered to prevent the occurrence of defective products. On the other hand, heat fusion requires a temperature above a certain level, which narrows the temperature control range, requires precise control of the heating temperature of the metal plate, and increases the cost of the fusion machine. There was an inconvenience that the price was high.

The present invention was developed in view of the above circumstances, and it is possible to prevent the occurrence of defective products by avoiding the rise in temperature of the foam sheet after it is crimped onto a metal plate, and also to prevent the generation of defective products. The purpose of this invention is to make it possible to easily control the temperature of a heating device.

[Means for Solving the Problems] In order to achieve this purpose, the fusion bonding machine according to the present invention is capable of crimping a heated metal plate and a foam sheet made of thermoplastic resin. The fusing machine is equipped with a metal plate cooling device that cools the metal plate at the same time as the metal plate is crimped by the crimping device.

The metal plate is heated, for example, by an infrared radiation type heating device such as a surface combustion burner or a panel heater, or a hot blast furnace that sends high-temperature gas heated by a burner or heater using a blower.

Foam sheets can be manufactured using a method called extrusion foaming, which involves kneading a liquid and a thermoplastic resin in an extruder and gasifying the liquid, even if it uses a pyrolytic foaming agent. However, any material that can be thermally bonded to a metal plate can be applied.

The thermoplastic resin forming the foam sheet is a polyolefin-based thermoplastic resin.
In particular, polyethylene, ethylene-vinyl acetate copolymer, polypropylene, etc. can be used.

As a metal plate cooling device, a part of the outer peripheral surface of the rotating roll that makes up the crimping device is immersed in cooling water stored in a water tank, or the rotating roll is cooled with low-temperature gas for cooling. A configuration in which the rotating roll itself is cooled and the metal plate is cooled by the rotating roll, a configuration in which cooling water is sprayed onto the metal plate immediately after crimping, or a configuration in which both of these configurations are used together. will be adopted.

[Function] According to the fusion machine of the present invention, a foam sheet is crimped onto a metal plate, the metal plate is cooled at the same time, and the bubble layer of the foam sheet is heated to a high temperature by the heat of the metal plate. can be avoided.

[Example] Hereinafter, an example of the present invention will be described in detail based on the drawings.

FIG. 1 is a schematic diagram of a fusion splicer according to an embodiment.

In the figure, 1 is a steel plate as an example of a metal plate. The steel plate 1 is conveyed along a conveyance path by a feeding device (not shown), and is heated to a constant temperature by a heating device (not shown) provided on the conveyance path.

2 is a foam sheet fed out from a sheet feeding device (not shown).

3 is a crimping device for crimping the heated steel plate 1 and the foam sheet 2, and is composed of a pair of upper and lower rotating rolls 3a and 3b that pinch the steel plate 1 and the foam sheet 2 while rotating. has been done.

4 is a water tank for immersing the lower part of the lower rotary roll 3b in cooling water. 5 from below, which is on the lower side of the conveyance path of the steel plate 1 than the crimping device 3;
This is a nozzle that sprays and supplies cooling water to the steel plate 1 at the crimping location. In this embodiment, the water tank 4 and nozzle 5 described above constitute a metal plate cooling device.

A scraper 6 is provided on the upper side of the conveyance path of the steel plate 1 than the rotating roll 3b immersed in cooling water, and is in sliding contact with the outer peripheral surface of the rotating roll 3b.

A foam sheet 2 is placed on the lower side of the crimping device 3.
A delivery device 7 is provided to send out the steel plate 1 crimped together along the conveyance direction, and an air scraper (not shown) is provided near the delivery device 7 to dry and remove cooling water adhering to the steel plate 1. It is being

Next, the operation of the above-mentioned fusion splicer will be explained.

When the heated steel plate 1 and the foam sheet 2 are fed into the crimping device 3, they are transferred to the rotating roll 3.
It is squeezed by a and 3b. Since the steel plate 1 is heated to an appropriate temperature to fuse the foam sheet 2, the foam sheet 2 in contact with the steel plate 1
surface melts. The steel plate 1 and the foam sheet 2 are compressed by the rotating rolls 3a and 3b, and at the same time, the steel plate 1 is rapidly cooled from its lower surface by the rotating roll 3b and the nozzle 5. Only the surface of the body sheet 2 melts and becomes the steel plate 1.
is crimped.

On the other hand, as the rotating roll 3b rotates, the water tank 4
The cooling water inside the rotary roll 3b adheres to the surface of the rotary roll 3b and tries to be pulled up to the upper side of the crimping area, but the cooling water that adheres to the rotary roll 3b is removed by the scraper 6.
The steel plate 1
There is no inconvenience that the foam sheet 2 is cooled down before being crimped with the foam sheet 2.

With the above fusion machine, the thickness is 0.6 mm and the width is 760 mm.
A steel plate 1 heated to ℃ has a thickness of 4 mm and a foaming ratio of 40.
Double polyethylene foam sheet 2 at a speed of 18 m/
When the foam sheet 2 was bonded by continuous operation at a speed of 10 min, the foam sheet 2 could be bonded well to the steel plate 1 without any blistering.

FIG. 2 is a plan view of the composite material thus obtained, and FIG. 3 is a partially omitted enlarged view thereof. Second
The composite material shown in Figures 3 and 3 has a width of, for example,
The foam sheet 2 is a heat-insulating roofing material with a length of 762 mm and a length of 30 m in the longitudinal direction, and there are unpasted parts of 500 mm at each end in the longitudinal direction and 50 mm at one end in the width direction, that is, a so-called partially pasted state. It is fused. The steel plate 1 obtained in this way has a fold on the steel plate 1.
is bent along the longitudinal direction to form a folded plate 1A as shown in the perspective view of FIG.
Both ends of the folded plates 1A in the width direction are stacked on top of each other as shown in the sectional view of FIG. 5, and the foam sheets 2 are butted against each other to form a roof. ing.

In addition, in the fusion machine shown in Fig. 1, the steel plate 1
A device for applying an adhesive to the surface of the steel plate 1 may be provided on the upper side of the conveyance path such as a hot air stove (not shown) for heating the steel plate 1 . By providing such an adhesive applicator, it is possible to construct a dual-purpose machine capable of joining the steel plate 1 and the foam sheet 2 by either adhesive or thermal fusion. That is, when joining the steel plate 1 and the foam sheet 2 with an adhesive, the hot air oven is used as a drying oven for drying the adhesive applied to the steel plate 1. Then, the steel plate 1 and the foam sheet 2 that have passed through a hot air oven as a drying oven
The steel plate 1 and the foam sheet 2 are bonded together by crimping them with the crimping device 3.

[Effect of the invention] According to the fusion splicer according to the invention, whether the crimping position by the crimping device and the cooling position with respect to the metal plate are the same,
Alternatively, because they are so close to each other, even if heat is received from the metal plate after crimping and before cooling, the temperature of the bubble layer of the foam sheet can be prevented from becoming high, which can cause This eliminates the occurrence of blisters, prevents the production of defective products, and makes it possible to produce roofing materials and the like with a high yield.

In addition, since the metal plate is effectively cooled as described above, it is possible to prevent the generation of defective products even if the heating temperature of the metal plate by the heating device is high, and it is possible to increase the upper limit temperature of the heating device. This has the advantage that the temperature control range can be expanded, the temperature of the heating device can be easily controlled with relatively rough precision, and the cost of the fusing machine can be reduced.

[Brief explanation of the drawing]

The drawings show an embodiment of the fusion splicer according to the present invention, FIG. 1 is a schematic diagram of the fusion splicer, FIG. 2 is a plan view of a steel plate to which a foam sheet is fused, and FIG. FIG. 4 is a partially omitted perspective view of a steel plate with body sheets fused together, FIG. 4 is a perspective view of a folded plate, and FIG. 5 is a sectional view of a roof formed by the folded plates. DESCRIPTION OF SYMBOLS 1... Steel plate as a metal plate, 2... Foam sheet, 3... Pressing device, 3a, 3b... Rotating roll, 4... Water tank, 5... Nozzle.

Claims (1)

[Claims for Utility Model Registration] (1) A fusion machine equipped with a crimping device for crimping a heated metal plate and a foam sheet made of thermoplastic resin, the fusion machine comprising crimping by the crimping device; A fusion splicer comprising a metal plate cooling device that simultaneously cools the metal plate. (2) The pressure bonding device includes a pair of rotating rolls that press the metal plate and the foam sheet while rotating, and the metal plate cooling device includes a water tank in which one of the rotating rolls is immersed in cooling water. The fusion splicer according to claim (1), comprising: (3) The fusion splicer according to claim 1, wherein the metal plate cooling device is configured with a nozzle that sprays and supplies cooling water to the metal plate at a crimping location by the crimping device. (4) The pressure bonding device includes a pair of rotating rolls that press the metal plate and the foam sheet while rotating, and the metal plate cooling device includes a water tank in which one of the rotating rolls is immersed in cooling water. and a nozzle that sprays and supplies cooling water to the metal plate at the location where the rotary roll presses the metal plate.