JPH04100844U - Manufacturing equipment for double-sided resin-coated steel sheets - Google Patents

Abstract

(57) [Summary] [Purpose] To provide an inexpensive manufacturing apparatus for double-sided resin-coated steel sheets that can obtain double-sided resin-coated steel plates at low cost. [Structure] A pair of T dies 22, 22 are arranged on both sides of a steel plate 21 that moves in the vertical direction. The slit-like openings 24, 24 of the T-dies 22, 22 are opposed to the surface of the steel plate 21, and the extruder 23 extrudes the melted and kneaded resin. T-die 2
A pair of pressure bonding rolls 26 and 26 are disposed downstream from 2 and 22 in the moving direction of the steel plate 21, and the thermoplastic resin 25 covering the surface of the steel plate 21 is simultaneously pressure bonded to the steel plate 21.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

The present invention relates to an apparatus for manufacturing a double-sided resin-coated steel sheet.

0002

[Conventional technology]

2 and 3 are published in Japanese Patent Application Laid-open No. 58-146841 and Double-sided resin coating of film pressure bonding method and T-die method disclosed in Publication No. 1451 This shows a steel plate manufacturing device.

0003 The film pressure-bonding double-sided resin-coated steel plate manufacturing device shown in Fig. 2 passes through a heating device 2. Thermoplastic resin film unwinding reels 4, 4 are placed above and below the steel plate 3, which has been preheated. , and the thermoplastic resin films 5, 5 unwound from the reels 4, 4 are placed above and below. A pair of pressure rolls 6, 6 are used to press the upper and lower surfaces of the steel plate 3 to form a double-sided resin-coated steel plate 1. Manufacture. Note that 7 and 7 indicate guide rolls for the thermoplastic resin films 5 and 5. .

0004 The T-die type double-sided resin-coated steel sheet manufacturing equipment shown in Figure 3 is capable of producing plastic film on both sides. Special resin film 8 with primer treated adhesive such as polyurethane and steel plate at room temperature 9 was coextruded from the first T-die 11 by a pair of extruders 10, 10. Pressure bonding via molten polyolefin resin 12 and polyolefin modified resin 13 The steel plate is laminated and coated with rolls 14, 14, and then a pair of extruders 15, 15 are applied to the surface of the steel plate. The polyolefin resin 17 and polyolefin resin coextruded from the second T-die 16 by The refin-modified resin 18 is laminated and coated with pressure rolls 19, 19 to form a double-sided resin-coated steel. A plate 20 is manufactured. Note that the extruders 10 and 15 are supplied with resin in the form of pellets. The material is fed, melted and kneaded inside the material, and extruded from T-dies 11 and 16.

[0005]

[Problem that the idea aims to solve]

Production equipment for double-sided resin-coated steel sheets using the above film crimping method (hereinafter referred to as film crimping type) This manufacturing equipment is a device that places a pair of upper and lower crimping rolls on the steel plate threading line. Therefore, the above-mentioned T-die method in which two pairs of left and right crimping rolls are arranged on the sheet threading line Compared to the production equipment for double-sided resin-coated steel sheets (hereinafter referred to as T-die production equipment), It has the advantage that fewer rolls are required and the cost of the pressure rolls is low. However However, film compression type manufacturing equipment uses thermoplastic resin processed into a film. Therefore, compared to T-die type manufacturing equipment that uses pelletized thermoplastic resin, All of them have the disadvantage that the resin cost is high and the manufacturing cost is high.

[0006] On the other hand, the T-die type manufacturing equipment requires less resin coating than the film pressure bonding type manufacturing equipment. It has the advantage of being inexpensive, but it requires two pairs of left and right crimping rolls, and the crimping The disadvantage is that the roll cost is high.

[0007] This invention secures the advantages of both of the above methods and eliminates the disadvantages by making a double-sided resin-coated steel plate. The purpose is to provide manufacturing equipment.

[0008]

[Means to solve the problem]

The gist of this invention is to use an extruder to install a pair of T dies on both sides of a vertically moving steel plate. The slit-shaped opening of the T-die through which the melted and kneaded resin is extruded faces the steel plate surface. The surface of the steel plate was coated downstream from this T-die in the direction of movement of the steel plate. It is characterized by a pair of pressure rolls that simultaneously pressure-bonds the thermoplastic resin to the steel plate. This is a manufacturing equipment for double-sided resin-coated steel sheets.

[0009]

[Action and Examples]

Figure 1 shows an embodiment of the device of the present invention, which is made of a steel plate coated on both sides with resin. The example of the molding equipment uses a preheating device (not shown) to preheat the resin and the steel plate in order to improve their adhesion. A pair of symmetrical plates are placed on both sides of the steel plate 21 moving vertically downward, with the steel plate 21 in between. The T-dies 22, 22 are T-dies through which the resin melted and kneaded by the extruders 23, 23 is extruded. The slit-shaped openings 24, 24 of the dies 22, 22 face the surface of the steel plate 21. The thermoplastic resin coating the surface of the steel plate 21 is placed below the T-dies 22, 22. A pair of crimping rolls 26, 26 are arranged to simultaneously crimp 25, 25 to the steel plate 21. It is something.

0010 According to the apparatus having such a configuration, the extruders 23, 23 cause the T-dies 22, 22, etc. The tip of the extruded molten resin film is pressed against the surface of the steel plate 21 moving downward. However, the moving speed of the steel plate 21 is made higher than the extrusion speed of the molten resin film. As shown in FIG. The resins 25, 25 in a molten state are drawn onto the steel plate 21 and coated, and a crimping roller is applied. The steel plates 26 and 26 are simultaneously crimped to obtain a double-sided resin-coated steel plate 27.

[0011] As is clear from this example, the present invention uses resin pellets, which are cheaper than films. Since the T-dies 22 and 22 are used, resin costs can be reduced and both sides can be coated with resin. The manufacturing cost of the covered steel plate can be reduced.

0012 Further, the direction in which the steel plate 21 passes is the vertical direction (vertically downward), and the steel plate 21 is A pair of T dies 22, 22 are installed in extruders 23, 23 symmetrically with a steel plate 21 on both sides. The slit-shaped openings of the T-dies 22, 22 through which the melted and kneaded resin is extruded are made of steel. Since they are arranged to face the surface of the plate 21, the slit shape of the T-dies 22, 22 The resin 25, 25 from the openings 24, 24 is drawn onto the steel plate 21 in a molten state. Since both sides of the steel plate 21 can be coated almost simultaneously, the lower part of the T-die 22 and 22 can be coated almost simultaneously. The left and right sides of the steel plate 21 are coated with a single pair of left and right pressure rolls 26, 26 placed in the The resin can be crimped onto the steel plate 21 at the same time.

[0013] In addition, in the example of the device shown in FIG. Although the T-dies 22 and 22 are arranged horizontally, even if they are arranged slightly shifted in the vertical direction. , or may be arranged with a downward slope. Furthermore, the threading direction of the steel plate 21 is set upward. In this case, the pressure rolls 26, 26 may be placed above the T-dies 22, 22. .

[0014]

[Effect of the idea]

As described above, according to the present invention, it is possible to manufacture double-sided resin-coated steel sheets at low cost. It is possible to obtain a production equipment for double-sided resin-coated steel sheets with low cost for crimping rolls. .

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram of an embodiment of the device of the present invention.

FIG. 2 is an explanatory diagram of a conventional device.

FIG. 3 is an explanatory diagram of a conventional device.

[Explanation of symbols]

1 Double-sided resin coated steel plate 2 Heating device 3 Steel plate 4 Thermoplastic resin film unwinding reel 5 Thermoplastic resin film 6 Crimping roll 7 Guide roll 8 Special resin film 9 Steel plate 10 Extruder 11 T die 12 Polyolefin resin 13 Polyolefin modified resin 14 Crimping roll 15 Extruder 16 T die 17 Polyolefin resin 18 Polyolefin modified resin 19 Crimping roll 20 Double-sided resin coated steel plate 21 Steel plate 22 T die 23 Extruder 24 Slit-shaped opening 25 Thermoplastic resin 26 Crimping roll 27 Double-sided resin coated steel plate

Claims (1)

[Scope of utility model registration request] Claim 1: A pair of T dies are arranged on both sides of a steel plate moving in the vertical direction so that the slit-shaped opening of the T dies through which resin melted and kneaded by an extruder is extruded faces the surface of the steel plate. 1. An apparatus for manufacturing a double-sided resin-coated steel sheet, characterized in that a pair of pressure rolls are disposed downstream of a T-die in the direction of movement of the steel sheet, for simultaneously crimping a thermoplastic resin coating the surface of the steel sheet onto the steel sheet.