JP3091097B2 - Laminated plate coated with lubricant, its manufacturing method and manufacturing equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a laminated plate coated with a lubricant, a method for producing the same, and a production facility. More specifically, the present invention relates to a laminated plate to which a lubricant for press molding has been applied in advance, and a suitable method and equipment for producing the same.

[0002]

2. Description of the Related Art In general, when a material for a can is subjected to press forming such as deep drawing and draw / ironing at the time of can making, it is necessary to apply a lubricant. However, since the surface of the laminated steel sheet is covered with a synthetic resin film, it is not easy to apply the lubricating oil uniformly on the surface.For example, the lubricant is repelled on the surface of the film to cause unevenness, There is a problem that it does not adhere. For this reason, conventionally, various measures were taken, such as selecting the combination of a film and a lubricant and the application conditions, and then a blank or blanked sheet of a certain shape was added to the lubricant or processing oil immediately before pressing. Are sprayed or coated, and a lubricant is sprayed on a mold every time processing is performed. The product after the press working also has a process for removing the lubricant before a process such as filling the contents.

[0003]

The above-mentioned conventional method is very complicated because a lubricant is applied to each blank immediately before press molding. In addition, it is more difficult to remove the lubricant from the molded product. The present invention eliminates the need to apply lubricant to blanks and molds before press molding,
Further, it is an object of the present invention to provide a laminated plate which is easy to process after molding and has been coated with a lubricant in advance.

It is a further object of the present invention to provide a method and equipment for easily producing such a laminate.

[0005]

According to the present invention, there is provided a laminated plate coated with a lubricant according to the present invention, comprising a base made of a thin metal plate, a synthetic resin film coated on at least one surface thereof, and a petroleum wax-based material coated thereon. It is characterized by comprising a lubricant layer. In such a laminate, the petroleum wax-based lubricant may use paraffin wax or white petrolatum. Further, the metal sheet can be a coil material, and as a synthetic resin film,
A polyethylene terephthalate film or the like can be employed.

According to the production method of the present invention, a laminated plate in which at least one surface of a thin metal plate is coated with a synthetic resin film is provided with a melting point of the lubricant to be applied of ± 20.
It is characterized in that it is heated to a temperature in the range of ° C, a molten lubricant is applied on the synthetic resin film, and the obtained product is roll-heated at a temperature of from -10 ° C to 90 ° C. Further, the obtained laminate plate,
The melting point of the lubricant is preferably wound into a coil while being guided by a roll heated to a temperature of -10 ° C or more and 90 ° C or less.

[0007] The production equipment of the present invention comprises a laminating plate in which at least one surface of a thin metal plate is coated with a synthetic resin film.
± 2 of melting point of lubricant to be applied
A pre-heating device for heating to 0 ° C., a coating device for coating the molten lubricant on the synthetic resin film,
And a heating device for heating the obtained product at a temperature of -10 ° C or more and 90 ° C or less. The heating device preferably comprises a heating furnace that maintains an atmosphere at a temperature of the melting point of −10 ° C. or more and 90 ° C. or less, and a heating roll provided therein, and further heats the heating device. A guide roll group heated to a temperature of -10 ° C. or more and 90 ° C. or less, and a winding machine for winding the guided laminated sheet into a coil, for guiding the melted lamination point of the laminated sheet. The equipment provided with is preferable.

[0008]

The petroleum wax-based lubricant layer is a stable substance in a normal state, and does not deteriorate itself and does not deteriorate the synthetic resin film. Furthermore, since it absorbs very little moisture, it reliably protects synthetic resin films and metal thin plates over a long period. Further, since it is solid or jelly-like at room temperature, even when the laminated plate is wound in a coil shape, it does not peel off from the laminated plate and hardly breaks the film. Therefore, even in the case of press working, a continuous coil material can be directly supplied to, for example, the blanking step of transfer processing or the first step of progressive processing, and the handling is simple. Furthermore, at the time of molding, the synthetic resin film is protected from friction with the mold and imparts appropriate slip properties. After molding, the applied petroleum wax-based lubricant layer is heated, for example, to about 220 ° C. It can be easily volatilized and removed.

In the production method of the present invention, when a molten petroleum wax-based lubricant is applied on a synthetic resin film of a preheated laminate, a lubricant layer is formed on the film without being repelled by the film. It is formed. In this state, the lubricant layer is not yet sufficiently uniform, but the lubricant layer is made uniform in the next roll heating step. Since the heating temperature is 90 ° C. or less, the films do not stick together when wound into a coil. Further, when a guide roll heated to a predetermined temperature range is used when winding in a coil shape, the lubricant solidifies on the roll and does not adhere. The production equipment of the present invention can carry out the above production method.

[0010]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing a laminated plate coated with a lubricant according to the present invention; FIG. 1 is a schematic enlarged cross-sectional view showing one embodiment of the laminated plate of the present invention, FIG. 2 is a system diagram showing one embodiment of the equipment of the present invention, and FIG. 3 is a diagram of a hot water heating device connected to the equipment of FIG. It is a system diagram showing an example.

In FIG. 1, reference numeral 1 denotes a base made of a thin metal plate, and a synthetic resin film 2 is coated on both sides thereof. Further, a lubricant layer 3 is provided on the surface of the film 2 to constitute a laminated plate 4 coated with a lubricant as a whole. The substrate 1 is made of a metal sheet used for press working, particularly for cans, or tin, nickel,
A surface-treated steel sheet plated with electrolytic chromic acid or the like. The thickness is usually about 0.13 to 0.32 mm, and the width is 650.
Those having a thickness of about 1200 mm are preferably used.

The material of the film 2 used in the present invention is selected depending on the purpose of providing the film. For example, polyethylene, polypropylene, ethylene-propylene copolymer, ethylene-acryl ester copolymer,
Olefin resin films such as ionomers; polyethylene terephthalate, polybutylene terephthalate,
Polyester films such as ethylene terephthalate / isophthalate copolymer, ethylene terephthalate / adipate copolymer, ethylene terephthalate / separate copolymer, butylene terephthalate / isophthalate copolymer; nylon 6, nylon 6.6, nylon 11,
Polyamide film such as nylon 12, polyvinyl chloride film, polyvinylidene chloride film; poly-P-xylene glycol biscarbonate, poly-dioxydiphenylethane carbonate, poly-dioxydiphenyl 2,2-propane carbonate, poly-dioxy Polycarbonate films such as diphenyl 1,1-ethane carbonate; acrylonitrile with high nitrile content
A high nitrile resin such as a butadiene copolymer or an acrylonitrile-styrene copolymer: a polystyrene copolymer can be used. In the present invention, all of the above resin films can be used, but among them, it is preferable to use a film composed of a polyester mainly composed of ethylene terephthalate units and having a biaxial molecular orientation. As the polyester resin, the ester repeating unit 7
Preferably, 5 to 95% consists of ethylene terephthalate units and the remaining 5 to 25% of ester repeat units consist of ester units other than ethylene terephthalate units. Acid components other than terephthalic acid include phthalic acid, isophthalic acid, succinic acid, azelaic acid, adipic acid, sebacic acid, dodecanedioic acid, diphenylcarboxylic acid,
One or more acid components of 1,4 cyclohexanedicarboxylic acid and trimetic anhydride can be mentioned, and the alcohol components other than ethylene glycol include 1,4 butanediol, 1,5 pentanedionediol, 1,6 hexane One or more saturated polyhydric alcohols of diol, propylene glycol, polytetramethylene glycol, trimethylene glycol, triethylene glycol, neopentyl glycol, 1,4 cyclohexanedimethanol, trimethylolpropane, and pentaerythritol are exemplified. . The ester unit other than the ethylene terephthalate unit may be any one or both of the acid component and the alcohol component as long as it is an acid component other than terephthalic acid and a polyhydric alcohol other than ethylene glycol. Can be used to obtain a copolymerized polyester. Such a copolymerized polyester resin can also be obtained by a method in which a polyester comprising a copolymerized component is blended with an ethylene terephthalate resin, melted, and then copolymerized by a distribution reaction. Furthermore, the intrinsic viscosity, that is, the IV value is 0.1.
If a polyester resin film having a thickness of 50 to 0.70 is used, a polyester resin-coated metal sheet having excellent denting resistance in the can body of a thin-walled deep drawn can can be obtained. In some cases, if necessary, additives such as stabilizers, antioxidants, antistatic agents, pigments, lubricants, corrosive inhibitors, etc. do not interfere with the present invention.
The film 2 preferably has a thickness of about 8 to 40 μm, particularly about 12 to 25 μm. These films 2 are coated on the substrate 1 by a commonly used method such as bonding with an adhesive or heat welding.

As the petroleum wax-based lubricant, paraffin wax, liquid paraffin, white petrolatum, and the like are employed. In particular, paraffin wax and white petrolatum are widely used for food containers and are therefore preferably used for food cans. Incidentally, petroleum wax has a melting point (Tm) of 45 to 88 ° C., particularly, paraffin wax has a melting point of about 60 to 63 ° C. and is solid at ordinary temperature. Further, white petrolatum has a melting point of 38 to 60 ° C. and exhibits a jelly-like or ointment-like shape at room temperature. The amount of the lubricant to be applied depends on the degree of processing, but is usually about 10 to 100 g / mm ² , especially 40 to 50 g / mm ^2.
/ m ² . After pressing, these lubricants
By heating to about 160 to 270 ° C, it can be easily volatilized and removed.

A laminated plate 4 coated with the above lubricant
Can be manufactured, for example, by the equipment 5 of FIG. In FIG. 2, reference numeral 4a denotes a laminated plate before applying a lubricant, and has a continuous strip form.
The equipment 5 includes a pre-heating device 6 for pre-heating the laminated plate 4a, a coating device 7 for applying a molten paraffin-based lubricant to the pre-heated laminated plate 4a, and further heating the coated laminated plate 4a. A heating device 8 for making the lubricant layer uniform, a guide device 9 for guiding the heated laminate plate 4, and two winding devices 10 for winding the manufactured strip-shaped laminate plate 4. It is composed of

The preheating roll 6 is constituted by a pair of hot water rolls 12, 12 which are heated by hot water sent from a hot water heating device 11 shown in FIG. Hot water roll 12
Surface temperature ± 20 ° C of lubricant melting point
Range. The coating device 7 is provided with a container 13 for containing the molten lubricant, a supply roll 15 partially immersed in the molten lubricant 14 therein, and a rotatable arrangement so as to come into contact with the supply roll 15. A pair of roll coaters (waxers) 17 including application rolls 16 are provided, and the roll coaters 17 are arranged to face each other with the laminate plate 4 interposed therebetween. As such a roll coater 17, a conventionally used one, for example, a commercially available product can be used as it is.

The heating device 8 has a high-temperature region 30 in which the internal temperature is kept constant within a predetermined range by the hot air sent from the hot-air generating device 18, and a rotatable heating device in the high-temperature region 30. And a heating furnace 19 for heating the heating roll 20 supported by the heating furnace. The high temperature region 30
A region in which equipment such as a heating roll 20, a heating furnace 19, a guide device 9, a winding device 10, a movable table 23, and a cutter 24 are housed in an enclosure.
Temperature is controlled. In this embodiment, two heating rolls 20 are used to change the direction of the laminate plate 4. The heating roll 20 is heated by passing an electric induction coil or high-temperature water. The ambient temperature in the heating furnace 9 and the surface temperature of the heating roll 20 are not lower than the melting point of the lubricant of −10 ° C. and not higher than 90 ° C.

The guide device 9 is provided with a pair of deflector rolls 21 each having a rubber (NBR) lining for changing the direction of the laminate plate 4, followed by a pair of deflector rolls 21.
Multiple guide rolls 22 with the same rubber lining
Are arranged. In this embodiment, since two winding devices 10 are employed, two rows of guide rolls 22 are provided. Each deflector roll 21 and the following guide roll 22 are provided with the hot water heating device 11 shown in FIG.
Are heated to a temperature of not less than 90 ° C. and above the melting point of the lubricant of −10 ° C. The winding device 10 is a conventionally known device. In the present embodiment, the winding device 10 is provided so that the coil can be replaced without stopping the operation of the entire equipment or with a minimum stop time.
Basically adopted. The movable table 23 and the cutter 24 allow the traveling direction of the band-shaped laminate plate 4 to be directed to the respective winding devices 10.

The hot water heating apparatus 11 shown in FIG.
And a pump 26 for pumping water from the tank,
A heat exchanger 28 for exchanging heat between the water sent from the pump and the steam from the steam circuit 27, and a temperature control unit 29 for maintaining a constant water temperature are provided. The temperature control unit 29 is a conventionally known one comprising a sensor (TIC) 30 for detecting the temperature of the water to be sent out, and a control valve 31 for adjusting the feed amount of steam based on the sensor. The first outlet 32 of the hot water heating device 11 is connected to the preliminary heating roll 6, and the second outlet 33 is connected to the deflector roll 21 and the guide roll 22.

When the equipment 5 configured as described above is operated, the laminate plate 4a before coating is firstly placed in the preheating device 6
Is heated to a temperature within a range of ± 20 ° C. of the melting point of the lubricant, and then, in this embodiment, the molten lubricant 1
4 is applied. The laminated plate 4 coming out of the heating furnace 19 is cooled, and the direction thereof is changed by the guide device 9.
It is wound by one of the winding devices 10. At this time, since the deflector roll 21 and the guide roll 22 are heated to a temperature of not less than 90 ° C. and a melting point of −10 ° C. or more of the lubricant, they do not solidify and adhere to those rolls. When one of the winding devices 10 becomes full, it is cut off by the cutter 24 and the movable table 2
In 3, it is turned to the other winding device 10 and winding by the winding device 10 is started.

Next, the working effects of the above equipment will be described with reference to specific examples and comparative examples.

EXAMPLE A paraffin wax having a melting point of 62 ± 2 ° C. was applied to a laminated plate having a polyester film having a thickness of 25 μm coated on both sides of a steel plate having a thickness of 0.26 mm using the equipment shown in FIG. Applied. The properties of paraffin wax are specified in JIS K-2235. The coating conditions are as shown in Table 1 below.

[0022]

[Table 1]

Comparative Example The same paraffin wax was applied under the application conditions shown in Table 1 above using the same laminated plate used in the examples.

Table 2 shows the appearance inspection, the state of the guide rolls, and the results of the deep drawing of the laminated plate coated with the lubricant obtained in the above Examples and Comparative Examples.

[0025]

[Table 2]

As shown in Table 2, according to the manufacturing method of the embodiment, the laminated plate has a uniform lubricant layer and the deep drawing is smooth even after long-term storage. It can be seen that the adhesion of the agent is uneven and the lubricant adheres to the roll side, which is not suitable for continuous mass production, and that the obtained laminate is not suitable for deep drawing.

[0027]

The laminated plate coated with the lubricant of the present invention can be pressed as it is even after long-term storage. Therefore, a conventional method in which a lubricant is applied to a blank material or a mold immediately before pressing is used. Press work can be performed more efficiently as compared with the laminated plate of the above. After the press molding, the lubricant can be easily removed by performing a high temperature treatment. ADVANTAGE OF THE INVENTION The manufacturing method and manufacturing apparatus of this invention can manufacture the laminated board which apply | coated the said lubricant continuously and efficiently.

[Brief description of the drawings]

FIG. 1 is an enlarged sectional view showing one embodiment of a laminate plate of the present invention.

FIG. 2 is a system diagram showing one embodiment of the equipment of the present invention.

FIG. 3 is a system diagram showing an example of a hot water heating device connected to the equipment of FIG. 2;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Substrate 2 Synthetic resin film 3 Lubricant layer 4 Laminated plate to which lubricant was applied 4a Laminated plate before applying lubricant 5 Equipment 6 Preheating device 7 Coating device 8 Heating device 9 Guide device 10 Winding device

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B32B 15/08 B21D 22/20

Claims (5)

(57) [Claims] 1. A laminated plate in which at least one side of a thin metal plate is coated with a synthetic resin film is heated to a temperature within a range of ± 20 ° C. of a melting point of a lubricant to be applied, and a lubricating liquid melted on the synthetic resin film is formed. Apply the agent,
A method for producing a laminate coated with a lubricant, wherein the obtained product is roll-heated at a temperature of not less than the melting point of −10 ° C. and not more than 90 ° C. 2. The laminated plate obtained by the method of claim 1 is melted at a melting point of a lubricant of −10 ° C. or more for 90 minutes.
A method of manufacturing a laminated board coated with a lubricant, which is wound into a coil while being guided by a roll heated to a temperature of not more than ° C. 3. A pre-heating device for heating a laminated plate in which at least one surface of a thin metal plate is coated with a synthetic resin film to within ± 20 ° C. of a melting point of a lubricant to be applied, and a synthetic resin film. A coating device for applying a molten lubricant onto the substrate, and a heating device for heating the obtained product at a temperature of -10 ° C or more and 90 ° C or less. Equipment for manufacturing laminated boards. 4. A heating furnace in which the heating device maintains an atmosphere at a temperature of from −10 ° C. to 90 ° C., and a heating roll housed in the heating furnace and maintained at the temperature. The facility according to claim 3, comprising: 5. A melting point of a lubricant for guiding a laminated plate heated by the heating device.
The facility according to claim 3, further comprising a guide roll group heated to a temperature of 10 ° C. or more and 90 ° C. or less, and a winder for winding the guided laminate plate in a coil shape.