JPS63168238A - Pressure resistant can subjected to drawn ironing by using aluminum coated steel plate - Google Patents

Abstract

PURPOSE:To integrally form a neck, shell and bottom parts and to obtain the strength and corrosion resistance of a can shell by subjecting a specific Al coated steel plate to a drawn ironing, press forming and necking-in as well. CONSTITUTION:A specifically treated steel plate is used for increasing the Al film adhesion of the Al coated steel plate of a blank to be offered for processing a can, preventing the Al separation and preventing the swell generation of the Al film. It is what the Al film in 5-80mum thickness is formed by plating which one kind among 0.01-0.3mum Zn, 0.01-0.3mum Zn-Ni alloy, 0.005-0.5mum Cr, and 0.1-1mum Mn on both faces of the steel plate, heating, rolling and reheating by sticking an Al powder in layers thereon or rolling, heating, rerolling and reheating. The shell part 1' of a bottomed hollow body whose one end is an opening end 6 and whose the other end a closed end 2 is formed with the drawn ironing of this Al coated steel plate and a concave spherical bottom part 4 is formed by press forming to integrally form a neck part 3 by necking-in.

Description

[Detailed Description of the Invention] <Field of Application in Industry 1> The present invention relates to a pressure can made of aluminum-coated steel plate and subjected to drawing and ironing processing, and is particularly concerned with a pressure can that does not rust on the bottom when used in a corrosive environment with high humidity and moisture such as a bathroom. Regarding pressure cans.

<Prior art and its problems> Conventionally, pressure-resistant cans used for spray chemicals, foam cosmetics, etc. have been drawn and squeezed cans (01 cans) using bump or In sheet as the can material. However,
This had the following problems.

fl) For 01 cans that use tinplate, even if they are painted,
In corrosive environments such as bathrooms where soapy water with low surface tension promotes the infiltration of moisture into defects and crevices of cans, red rust will quickly form on the bottom of the can, which comes into contact with moisture for a long period of time. , contaminates bathroom tiles etc. with red rust.

(2) Also, due to the problem of jQi raw materials and pollution, the contents of cans have shifted from those dissolved in organic solvents such as alcohol to aqueous solutions, and the corrosiveness of the contents has changed. Therefore, it is desired to improve the corrosion resistance of cans.

(:I) D1 cans using In sheet have excellent corrosion resistance, but sheet J! If J is thin, sufficient can strength cannot be obtained, and the can strength 12 required to withstand pressure and maintain can shape over a long period of use.
Using 11 steps to make the IHI increases the material cost, resulting in a can that is more expensive to manufacture. Tin cans provide can strength, but the rust mentioned above is a problem.

<Object of the Invention> The present invention has been made in view of the above circumstances, and a hard and brittle iron alloy layer is not formed at the interface between the iron plate and the steel plate.
The cans required for pressure-resistant cans are made by drawing and ironing (DI processing) using ^2 coated steel sheets manufactured by the powder method that have the strength and formability of steel of 4T L and the same corrosion resistance as 82. To provide a Dr-treated pressure can which has strong body strength, does not show red rust on the bottom even after long-term use in a humid environment, and has corrosion resistance equivalent to 82 against the contents of the can. The purpose is to

<Structure of the Invention> According to the first aspect of the present invention, 0.01 to 0.0% Zn is added to both surfaces of the steel plate in advance. :l pm, Zn-Ni alloy from 0.01 to 0. :l 4, Cr 0.005-0.5
Mn and Mn are plated with any one of 0.1 to 1-, and then aluminum (including aluminum containing ti-added elements) powder is adhered to this layer in a layer and heated.

1i7 of 5 to 80-J so by rolling and reheating or rolling, heating, rerolling and reheating treatment
The aluminum coated steel plate formed with the aluminum layer described in f is drawn and pressed to form a hollow body with a bottom, one end of which is an open end and the other end of which is a closed end, and the closed end of this bottomed hollow body is The neck, body, and bottom are integrally formed by forming the bottom into a concave spherical shape by press forming (bottoming) processing, and adding neck-in to the open end to form 6 parts. A pressure can is provided which is drawn and ironed using an aluminum coated steel plate characterized by the following.

According to the second aspect of the present invention, 0.01 to 0.3-1 Zn-Ni alloy is applied to both surfaces of the steel plate in advance.
1-0.3) xn, Cr 0.005-0.5 μm,
and Mn of 0.1-1-, then aluminum (including aluminum containing additive elements) powder is deposited in a layered manner, and heated, rolled and reheated, or rolled. The aluminum coated scrap board is formed by heating, rerolling, and reheating to form the aluminum layer with a thickness of 5 to 80 mm, and is drawn and ironed to form an open end at one end and a closed end at the other end. A hollow body with a bottom is formed, a hole is made in the approximate center of the closed end of the 41-bottomed hollow body, the peripheral edge of the hole is expanded outwardly from the open end to form a neck, and the aluminum is inserted into the open end. There is provided a pressure-resistant can which is drawn and ironed using an aluminum coated V-steel plate, characterized in that the open end is closed by wrapping another concave spherical bottom plate formed from a coated steel plate. .

The present invention will be explained in more detail below.

A method for manufacturing aluminum (including aluminum containing additive elements) coated steel sheets has already been published in Japanese Patent Publication No. 54-439.
No. 78, JP-A-58-133378, JP-A-58-2
No. 5492, Japanese Unexamined Patent Publication No. 59-83769, and the like.

In the present invention, Zn is added to the surface of the steel sheet in advance to 0, 0 to 0. :1 μm, Zn-Ni alloy 0. Old ~ 0.3
P, Cr 0.005-0.5- and Mn 0.0-0.
Plating any one of 1 to 1-. The purpose of this is to use the lfi-covered steel plate, which is the material to be processed into cans.
It increases the adhesion of the film to prevent AIL11!2 from peeling off during can processing, and also prevents AIL11!2 from peeling off during can processing.
The purpose is to prevent blisters from forming on the 1° membrane.

Here, Zn or Zn-Ni alloy or Cr
Or, the amount of Mn plating is limited to the above ranges,
In either case, sufficient adhesion of the film cannot be obtained even if the value exceeds the limit value G or is less than the limit value F of each range in E. Particularly in the case of '/, n, if the value exceeds l2IIZJ, blistering will occur due to steam generation of '/, n during heating during the manufacturing step f.

The fil of the powder is adjusted to form a predetermined film J2 on any of the above plating layers, and the powder is applied in a layered manner. Any method may be used, such as a method of coating and drying or a method of attaching the powder to the steel plate using static electricity. Thereafter, rolling and heating were performed to make the R powder layer into a complete film.

Closely adhere to the steel plate. If necessary, after rolling and heating the second powder layer, the rolling and heating may be repeated.

The In powder used may be pure In powder, but it may also be In powder to which additional elements are added to improve the chemical resistance of In powder.

The AJZ coated steel sheet manufactured in this way includes:

Since a hard and brittle ^l-iron alloy layer is not formed at the interface between the steel sheet and the steel plate, extra strength can be obtained.

The film thickness is preferably from 5 to 80 mm. If the film thickness is less than 5 -, there will be many pinholes in the l film after processing and the resistance will be poor.
MJ! If X exceeds 80-, DI (diaphragm and squeeze) is added.
This is because the film sometimes peels off, making it impossible to obtain a satisfactory product.

The pressure can of the present invention is manufactured by DI processing using the F2-coated steel sheet manufactured in this way.
This will be explained based on the diagram.

FIG. 1 is a diagram showing the flow of Dr machining step 1 in the present invention. The lfE-covered steel plate obtained by the method described in Section 7 was subjected to the first (approximately a distance in the figure) and second (approximately b1) drawings by the conventional drawing method 1, and one end was opened. One end 6 forms a bottomed hollow body with the other end forming a closed end 2. The body 1' of this hollow body with a bottom is subjected to a conventional ironing process to form a hollow body with a bottom having a can body 1 and a closed end 2 (approximately cL).

The present invention constitutes a first aspect and a second aspect through the following steps.

According to a first aspect of the invention, the bottom hollow body (clI
11), the open end 6 side is necked in by means of roll form or press form to form the 8 part 3, while the closed end 2 is turned inward by means of press form (bottoming). It is possible to obtain a pressure can 10 in which the bottom part 4 is made convex and has a concave spherical shape, and the mounting part 3, the can body part 1, and the bottom part 4 are integrally formed.

By integrally forming the entire can, problems such as poor bonding can be prevented.

According to the second aspect of the present invention, a hole 7 is bored in the approximate center of the closed end 2 of the -1T bottom hollow body (about a length), and the hole 7 is expanded outward. The opening end 6 is provided with a four-spherical bottom portion 9 which is separately formed by punching or the like from the above-mentioned 11-coated steel plate, and its periphery is tightened using a conventional method. A two-piece pressure can 11 can be obtained by tightening and attaching by applying force.

By forming a two-piece can in this way, there is an effect that it is easier to obtain a taller can with the same diameter.

<Example> Next, the present invention will be explained in more detail based on examples.

[Example 1] A cold-rolled steel plate for tinplate was electrolytically degreased with sodium hydroxide, washed with water,
After pickling with hydrochloric acid and washing with water, both sides of the steel plate were electroplated with zinc to a thickness of 0.1 - using the following galvanizing bath.

1 [Lead plating bath Zinc sulfate 240 g/11 Ammonium chloride 15 g/Q Ammonium sulfate 3
0 g/fl Sodium acetate 15 g/Qp
H value 4 Bath temperature 30°C Current density 3 8/d A water slurry of An powder (1325 mesh) was applied to a galvanized steel plate.
Apply U/water = 8g/log) with a roll coater,
After drying, it was heated in the air at 450°C for 2 minutes, then rolled at a rolling reduction of 7%, and finally heated at 550°C for 10 seconds to obtain a W steel plate. The thickness of the 8×I plates was 25 mm on each side, and the total plate thickness was 0.55 mm.

To this powder method, a disk blank with a diameter of 115 mm was punched from a 1ifi-covered steel plate, and by DI processing 1, which consisted of a series of steps of first drawing [and second drawing], and first ironing and second ironing. Diameter 40mm x height loo+nm
A bottomed hollow body was molded, the bottom surface of this bottomed hollow body was processed into a concave curved surface, the open end was then necked in, and a spout part was attached to form an integrally molded pressure can.

Even when the bottom of the pressure can manufactured in this way was left in a bathroom with the bottom periphery dug out, no red rust developed around the bottom even after three months had passed.

[Example 2] Total plate thickness 0.55 mm manufactured by the same method as Example 1
Powder method with a plate thickness of 25mm and a coating on both sides
+" Using a 115 mm diameter disc obtained from a U steel plate as a blank, a DI addition of about L was performed in the same manner as in Example 1,
A bottomed hollow body with a diameter of 40+nm and a height of 100 mm was formed, and an overhang hole was drilled at the closed end side of the bottomed hollow body to attach the spout parts. The open end of the bottomed hollow body was flanged to form a two-piece can body.

On the other hand, the same A! lII! Total plate thickness with 2 thicknesses 0.30
Using un's powder method 1 coated steel plate, punch out a disc-shaped member with a diameter slightly larger than the diameter of the can body, form it into a concave spherical shape by press forming (bottoming), and surround it with the above-mentioned material. The member had a curled portion that could be wrapped around a flange, and a sealing material was applied to the curled portion and the curled portion was tightened to form the bottom of the concave curved surface of the pressure can.

The bottom of the pressure can manufactured in this manner did not develop red rust around the bottom even after three months had passed even when the bottom was left wet in a bathroom.

[Comparative example]

Example 1 A disk blank with a diameter of 115 mm was punched out from a commercially available tin steel plate with a thickness of 0.55 mm and a Sn plating coating amount of #75 (coating amount of 1 on the front and back sides, I #m).
Similarly, apply 1 r to a diameter of 40 mm x height of 100 mm.
[111] A cylindrical body with a bottom was formed, the closed end of the cylindrical body with a bottom was made into a concave curved surface, and the open end was then neck-ined, and a spout part was attached to form an integrally molded pressure can. .

When the pressure can thus produced was left in a bathroom with its bottom cracked, significant red rust was observed after 48 hours.

Further, as shown in Table 1, when the pressure cans obtained in Example 1 were left in the bathroom at the same time, no red rust occurred even after 3 months.

Table 1 0: No red rust △: Slight red rust occurrence ×: Significant red rust occurrence An AIM IU raw steel plate that does not form a hard and brittle iron alloy layer at the interface between the second layer and the steel plate, leaving the strength and additivity of the steel, and providing corrosion resistance equivalent to 82. Since the pressure cans were manufactured by adding 01 to this, the can body strength required for pressure cans could be obtained, red rust would not occur even after long-term use in a humid environment, and the contents of the can would not be affected. It is also possible to provide a pressure can with corrosion resistance equivalent to that of 8n.

[Brief explanation of the drawing]

FIG. 1 is a flowchart showing step 1 of manufacturing a pressure can of the present invention. Explanation of the symbols 1... Can body after drawing and ironing process, 1' - Can body after drawing process, 2... Closed end, 3... Neck part with neck-in process, 4... Concave Spherical bottom, 6... Open end, 7... Hole, 8... Expanded 1': i part, 9... Four-spherical bottom (two-piece can), 10...・Pressure can obtained according to the embodiment of the invention cylinder 1, 11-...Pressure can obtained according to the embodiment of the invention cylinder 2 Patent applicant: Kawatetsu Techno Research Co., Ltd. Kawasaki Steel Corporation Agent: Asia Metal Refinery Co., Ltd. For patent attorney Nozomi Watanabe゛-゛i゛'1・-:1″ 1ko-, 1 (a) (d) 3, 1 and

Claims (2)

[Claims] (1) Zn is applied in advance to both surfaces of the steel plate by 0.01 to 0.
3 μm, Zn-Ni alloy 0.01-0.3 μm, Cr
0.005-0.5μm, and Mn 0.1-1μm.
Plating any one of m, and then adhering aluminum (including aluminum containing additive elements) powder on top of this in a layered manner, heating, rolling and reheating, or rolling, heating, rerolling and reheating. The aluminum-coated steel plate formed with the aluminum layer with a thickness of 5 to 80 μm by treatment is drawn and ironed to form a bottomed hollow body with one end being an open end and the other end being a closed end. Press form (bottoming) the closed end of the hollow body with a bottom.
An aluminum coating characterized in that the neck, body, and bottom are integrally formed by processing the opening into a concave spherical shape to form the bottom and necking the open end to form the neck. A pressure can made of drawn and ironed steel plate. (2) Zn is applied in advance to both surfaces of the steel plate by 0.01 to 0.
3 μm, Zn-Ni alloy 0.01-0.3 μm, Cr
0.005-0.5μm, and Mn 0.1-1μm.
Plating any one of m, and then adhering aluminum (including aluminum containing additive elements) powder on top of this in a layered manner, heating, rolling and reheating, or rolling, heating, rerolling and reheating. The aluminum coated steel plate formed with the aluminum layer with a thickness of 5 to 80 μm is drawn and ironed to form a bottomed hollow body with one end being an open end and the other end being a closed end. A hole is made approximately in the center of the closed end of the bottom hollow body, and the peripheral edge of the hole is pushed outward from the open end to form a neck,
1. A pressure can drawn and ironed using an aluminum coated steel plate, characterized in that the open end is closed by wrapping a concave spherical bottom plate formed from the aluminum coated steel plate around the open end.