JPH06884A - Surface treatment of surface plate member of gas range made of steel plate or stainless steel plate - Google Patents

Abstract

PURPOSE:To enhance the bonding strength of the fluoroplastic film bonded to the surface of the surface plate member of a gas range and the surface plate member. CONSTITUTION:The surface treatment method of the surface plate member of a gas range made of a steel plate or a stainless steel plate consists of a first process forming deep grooves(g) on the surface of the surface plate member 1 by etching, sandblasting or a cutter, a second process pressing and wetting the walls(w) of the grooves(g) formed on the surface of the surface plate member 1 to form the grooves(g) into a bottom wide shape having a narrow inlet, a third process placing a fluoroplastic film Ff on the surface plate member 1 to heat the same to the softening point to press the film Ff to the surface of the surface plate member 1 to perform primary bonding, a fourth process heating the surface plate member 1 having the fluoroplastic film Ff bonded thereto to the m.p. of fluoroplastic to liquefy the fluoroplastic film Ff and a fifth process cooling and solidifying the surface plate member 1 having the fluoroplastic film Ff in a liquefied state.

Description

Detailed Description of the Invention

[0001]

[Industrial field of use] A surface treatment method for immediately removing dirt on the surface of a surface plate such as a steel plate or a stainless steel gas range.

[0002]

2. Description of the Related Art The present applicant has applied for a surface treatment method for a steel plate such as a gas range or a stainless steel kitchen appliance as Japanese Patent Application No. 4-108092.

According to this prior invention, since the fluororesin film is attached to the surface of the front plate of the gas range, the surface of the front plate is sandblasted in advance to form a rough surface. Then, the formed front plate is etched to form a secondary recess in the recess formed in the rough surface.

Then, the fluororesin film is wedged in the secondary recess. However, when the formation of the secondary recess is weak, the adhesive force between the fluororesin film and the front plate body is lowered. become.

[0005]

[PROBLEMS TO BE SOLVED BY THE INVENTION] To improve the adhesive force between a fluororesin film adhered to the surface of a surface plate such as a gas range and the surface plate.

[0006]

[Technical means]

1st invention: The surface treatment method of the surface plate body, such as a gas range, which consists of the following processes.

First step: A rough surface is formed on the surface of the flat plate 1 by means of corrosion, sand blasting, a cutter or the like.

Second step: The wall w of the groove g on the surface of the front plate 1 is pressed by a roll or the like to crush the wall portion w of the groove.

Third step: The front plate 1 is heated so that the fluororesin reaches the softening temperature, and the fluororesin film is placed on the plate and hot-laminated.

Fourth step: Next, the fluororesin film Ff
The laminated plate of is heated to the melting point of the fluororesin film Ff to liquefy the fluororesin film Ff,
The air a remaining in the recess is eliminated.

Fifth step: The front plate 1 is cooled and the fluororesin film Ff is cured to be integrated with the front plate 1. The surface-treated surface plate body thus obtained is appropriately molded.

Second invention: The first step employs a step of placing a net mask m on the surface of the front plate 1 and immersing it in an etching solution e to corrode the mesh portion of the net mask m. It is advantageous.

Third invention: A surface treatment method for a steel plate or a surface plate body such as a stainless steel gas cooker comprising the following steps.

First step: As a first step, a step of placing a net mask m on the surface of the front plate and immersing it in an etching solution e to corrode the mesh portion of the net mask m:

Second step: a step of heating the front plate body 1 so that the film Ff reaches a softening point and pressing the film Ff to the surface of the front plate body 1 for primary adhesion.

Third step: a step of liquefying the fluororesin film Ff by heating the front plate body 1 to which the fluororesin film Ff is primarily adhered to the melting point of the fluororesin.

Fourth step: a step of cooling and solidifying the front plate body 1 in a state where the fluororesin film Ff is liquefied,

[0018]

[Action]

First invention; Second invention: In the first step, for example, when the net mask m is placed on the surface of the front plate body 1 and immersed in the etching solution e to corrode the mesh portion of the net mask m, the groove g is formed on the surface. And the walls w remain at almost the same height at the boundary of the groove g.

After the second step, if the top surface of the wall w at the boundary of the groove g is pressed to form a wide top surface tp, or if the wall w is inclined in one direction, the inlet is narrowed. A groove g1 having a wide bottom is formed. Therefore, in the fluororesin film Ff that adheres to the surface, the wedged portion does not come off in the groove g1, and the film Ff does not peel off.

Third invention: The third invention is, in the first step,
The immersion time is taken for a long time, and the surface of the front plate body is corroded by the etching solution e until the secondary recess u is formed in the groove g. The fluororesin film Ff is adhered without forming a wide groove having a narrow entrance.

In the third aspect of the invention, since the net mask m is used for corrosion, the grooves g are uniformly distributed and the walls w of the grooves are uniformly distributed.
Has a uniform height, and therefore, the fluororesin film Ff has an advantage that the adhesive force acts uniformly on the surface of the front plate 1.

[0022]

EXAMPLES Examples of the first and second inventions will be described below. First step: FIG. 1 shows a front plate body 1 for carrying out the method of the present invention.

The surface of the front plate 1 shown in FIG. 1 is roughened by forming a deep groove g by corrosion, sandblasting, a cutter or the like. In particular, in the first step, it is preferable that the net mask m is placed on the surface of the front plate body 1 as shown in FIG. 2 and immersed in the etching solution e as shown in FIG.

Then, the etching solution e corrodes the mesh portion of the gap of the net mask m as shown in FIG. 4, but at this time, the portion of the net mask m is escaped from the corrosion, and thus the formed groove g is formed.
At the boundary of, the wall w remains at the same level.

Moreover, the grooves g are formed by being uniformly dispersed on the surface of the front plate 1. Further, if the dipping time is set to a relatively long time, the secondary rough surface u is formed even if the grooves g do not communicate with each other. In the first step, the net mask m is finally removed from the front plate body 1 as shown in FIG.

Second step: In the second step, the roller r is reciprocated on the surface of the front plate 1 as shown in FIG. 6, whereby the top surface of the wall w of the groove g is changed from a dotted line to a flat shape. Therefore, the groove g has a wide bottom with a narrow inlet.

Further, as shown in FIG. 7, when the roller r is passed over the surface of the front plate 1 in one direction, the wall w falls in one direction and the groove g becomes wide with a narrow entrance.

That is, in the second step, the groove g is formed by the groove g1 having a narrow inlet and a wide bottom.

Third step: Next, as shown in FIG. 8, the front plate body 1 is heated to a softening temperature of the resin in a preheating furnace, and a fluorine film is laminated thereon, so that the fluorine resin film F is formed.
f is softened and wedged in the groove g1. As shown in FIG. 5, air a remains between the softened fluororesin film Ff, the groove g1 and the front plate 1. The front plate 1 and the film Ff are simultaneously heated to a softening temperature by an appropriate means.

Fourth step: Next, in the state shown in FIG. 9, the front plate body 1 is left in a state where the film Ff and the front plate body 1 are temporarily bonded.
Is heated in a furnace. And the temperature of the heating furnace is 290 ° ~
The temperature is set to 400 ° C. (depending on the type of fluororesin), and the fluororesin film Ff is liquefied. The temperature of the heating furnace is set according to the melting point of the fluororesin film Ff used. The front plate 1 is also simultaneously heated to the melting point of the film Ff by an appropriate means.

When the film Ff is liquefied, the air a remaining in the groove g1 is removed to the outside mainly through the boundary surface between the surface of the front plate 1 and the liquefied film Ff. Thus, the air in the groove g1 is liquefied as shown in FIG.
is replaced by f.

Fifth step: Finally, the front plate 1 is cooled and hardened together with the liquefied film Ff, and the fluororesin film Ff and the front plate 1 are integrally bonded.

Although the above embodiments have been described with respect to the case where the net mask m is used in the first step, the surface of the front plate 1 may be roughened by using sandblast, a hairline, a cutter or a laser beam. When the surface plate 1 is formed with a rough surface by a method other than corrosion, it is preferable to further perform acid treatment after the first step to form the secondary recess u in the groove g. When the secondary recess u is formed in this manner, the bond between the fluororesin film Ff and the front plate body 1 described later becomes stronger.

As the fluororesin film Ff, tetrafluoroethylene copolymer such as Akron COP (trade name of resin manufactured by Asahi Glass Co., Ltd.) is used, which has an advantage that stains are easily removed.

The tetrafluoroethylene copolymer has a softening temperature of 200 ° C. and a melting point of 280 ° C. or less, is resistant to temperature changes, and is suitable as a coating resin for the front plate of a gas range.
The details are described in Japanese Patent Application No. 4-108092 mentioned above.

Third invention: In the third invention, in the first and second inventions, in particular, instead of forming the groove g into a wide bottom shape with a narrow inlet, the net mask m is formed on the surface of the front plate body 1 in the first step. It is placed on and corrodes the mesh part.

In the first step, if the etching solution immersion time is set to be long, the secondary recess u can be formed as shown in FIG. In an extreme case, the grooves g may communicate with each other.

Due to the presence of the secondary recess u, once the fluororesin film Ff enters the groove g in the liquefied state in the third step, it does not come out after solidification.

In the third invention, since the net mask m is used in the first step, the grooves g are evenly distributed on the surface and the height of the wall w is uniform, so that the front plate of the fluororesin film Ff is formed. There is an advantage that the adhesive force to the body 1 acts uniformly.

[0040]

【The invention's effect】

1st invention: (a) Since the top surface of the wall w at the boundary of the groove g is flatly pressed or tilted after forming a rough surface with the groove g formed on the surface of the front plate body 1, the entrance is wide and narrow. -Shaped groove g1 is formed. Therefore, the fluororesin film Ff that once enters the wide-bottomed groove g1 in a liquefied state and then solidifies is integrally bonded to the front plate body 1 and is not peeled off.

(B) Since the fluororesin film Ff is once softened and primary-bonded to the front plate body 1 and wedged into the groove g1 on the rough surface, the film Ff is liquefied. It is possible to liquefy in g1 and reliably expel air from the groove g1.

Second invention: In the first step, since the net mask m is placed on the front plate body 1 to corrode its mesh, the grooves g are evenly distributed on the surface and the height of the wall w is also uniform. Therefore, when the bottom of the inlet is widened in the second step, the inlet is formed to have a uniform height and is narrower than the bottom. If the net mask m is not used, the height of the wall w will be non-uniform, and there will be a groove g that cannot narrow the entrance.

Third invention: In the first step, since the net mask m is placed on the front plate 1 to corrode the mesh portion, the groove g
Are uniformly distributed on the surface and the wall w of the groove g also has a uniform height, so that the adhesive force between the fluororesin film Ff and the front plate body 1 acts uniformly on the surface. Therefore, the fluororesin film Ff does not peel off.

[Brief description of drawings]

FIG. 1 shows a front plate body 1 before surface treatment.

FIG. 2 is a perspective view of a net mask m and a front plate body 1,

FIG. 3 shows a state immediately after immersion in the etching solution e in the first step of the first and second inventions.

FIG. 4 also shows a state at the final point of corrosion.

FIG. 5 also shows a state at the time when the net mask m is removed.

FIG. 6 shows a state in which the top surface of the wall w of the groove g is pressed flat in the second step of the first invention.

FIG. 7 shows a state in which the wall w is also tilted to one side.

FIG. 8 is an explanatory diagram of a third step in the first and second steps,

FIG. 9 is an explanatory view of a fourth step,

FIG. 10 is an explanatory view of the first step of the third invention,

[Explanation of symbols]

1: surface plate, m: net mask, e: etching solution,
w: wall, g: groove, gl: deformed groove, phr: preheating roller, hr: heating roller.

Claims (3)

[Claims] 1. A method for surface treatment of a steel plate or a surface plate body such as a stainless steel gas cooker comprising the following steps. 1st step: a step of making a deep groove g by corroding the surface of the surface plate 1 by sandblasting, a cutter, etc. 2nd step: crushing the wall w of the groove g on the surface of the surface plate 1,
Step of making the shape of the groove g wide with a narrow inlet, Third step: The fluororesin film Ff is placed on the front plate body 1 and heated at the softening point of the film Ff to form the film F.
Step of pressing f to the surface of the front plate 1 for primary adhesion, Fourth step: heating the front plate 1 to which the fluororesin film Ff is primarily adhered to the melting point of the fluororesin to liquefy the fluororesin film Ff Step 5: Step 5: Step of cooling and solidifying the front plate body 1 in a state where the fluororesin film Ff is liquefied, 2. The steel plate or stainless steel according to claim 1, wherein in the first step, a net mask m is placed on the surface of the front plate body 1 and immersed in the etching solution e to corrode the mesh portion of the net mask m. Surface treatment method for surface plates such as gas stoves. 3. A surface treatment method for a front plate such as a steel plate or a gas range made of stainless steel, which comprises the following steps. First step: As a first step, a net mask m is placed on the surface of the front plate body 1 and immersed in an etching solution e to corrode the mesh portion of the net mask m: Second step: on the front plate body 1 The fluororesin film Ff is placed on the film Ff and heated at the softening point of the film Ff.
Step of pressing f onto the surface of the front plate body 1 for primary adhesion, Third step: heating the front plate body 1 with the primary adhesion of the fluororesin film Ff to the melting point of the fluororesin to liquefy the fluororesin film Ff Step of performing, Fourth step: Step of cooling and solidifying the front plate body 1 in a state where the fluororesin film Ff is liquefied,