JP3218501B2 - Burner cap manufacturing method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a burner cap of a gas burner for a stove.

[0002]

2. Description of the Related Art A gas burner for a cooking stove comprises a burner body and a burner cap mounted on the upper surface of a burner head of the burner body. According to the purpose, further, according to the purpose, furthermore, an umbrella part for boil-over prevention covering the central opening of the cap body from above, and extending upward from the inner peripheral edge of the central opening of the cap body.
It has a cylindrical portion into which a pan bottom temperature sensor can be inserted.

[0003]

A burner cap is generally manufactured by cutting, punching or trimming a predetermined portion of a semi-finished product formed by forging or casting. Therefore, when manufacturing products having different shapes such as a burner cap with an umbrella portion and a burner cap with a cylindrical portion, it is necessary to prepare molds corresponding to each shape and manufacture semi-finished products having different shapes. There is.

[0004] It is an object of the present invention to improve the productivity and reduce the production cost by partially sharing the manufacturing process of the burner main body with the umbrella portion and the manufacturing process of the burner main body with the cylindrical portion.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has an annular cap body having a flame hole on its outer periphery and a plurality of surrounding pillars extending upward from a central opening of the cap body. A first burner cap provided with an umbrella portion for preventing spillover provided to cover the central opening of the burner cap from above, an annular cap body having a flame hole on the outer periphery, and a central opening of the cap body. And a second burner cap comprising a heat-shielding cylinder portion into which a pan bottom temperature sensor is inserted.
A first configuration in which a hollow convex portion having the cylindrical portion and the column portion and the umbrella portion bulging to the inner or outer peripheral side of the cylindrical portion is integrally formed by forging or casting on a cap body. A common semi-finished product is manufactured for both the burner cap and the second burner cap, and then a first post-process is performed to remove the cylindrical portion of the semi-finished product so that the support portion remains, and the first burner cap is manufactured. The second burner cap is manufactured by performing a second post-process of manufacturing and forming an opening through which a pan bottom temperature sensor can be inserted in the umbrella portion of the semi-finished product.

As described above, if a semi-finished product in which a hollow convex portion having an umbrella portion, a tubular portion, and a support portion is formed integrally with a cap body is manufactured, by selecting a removed portion, the same shape can be obtained. Of different shapes are manufactured from the semi-finished products.

When manufacturing the second burner cap, a gap is formed in a later step so that a column is left at the lower end of the cylindrical portion, and the gap is formed in the combustion portion of the gas ejected from the flame hole through the gap. You may make it supply secondary air. Also,
Regardless of whether the first burner cap or the second burner cap is manufactured, a central flame hole that penetrates the cap body up and down is formed in the cap body in a later step to adjust the distribution of flame. You may.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIGS.
Is a first burner cap, and a burner cap 1a
Is mounted on the annular burner body B to constitute a gas burner for the stove.

The burner cap 1a has an annular cap body 2 and a boss 3 extending downward from the cap body 2 and communicating with a central opening 21 of the cap body 2. Also, a large number of tooth profiles 2a are projected from the outer peripheral portion of the lower surface of the cap body 2 at intervals in the circumferential direction, and the tooth profile 2a is fitted with the boss portion 3 fitted on the inner periphery of the burner body B.
Is seated on the upper surface of the burner body, and the upper surface is
When a gap is formed between the cap body 2 and the cap body 2, a large number of flame holes including the gap are formed on the outer periphery of the cap body 2.
The gas can be spouted outward from the outer peripheral portion.

Above the boss portion 3 of the cap body 2, a substantially circular umbrella portion 5 for preventing spilling is mounted, which is supported by a column portion 4 extending upward from the cap body 2, whereby an opening is formed. Prevent the broth from entering the 21.
The space between the umbrella portion 5 and the cap body 2 is the outlet 6 for the secondary air through the opening 21. In addition, the support part 4 is 12
Three places are provided in the circumferential direction at 0 ° intervals.

FIGS. 3 and 4 show a second embodiment.
Burner cap 1b. Note that common parts are denoted by the same reference numerals, and description thereof is omitted.

The burner cap 1b includes a cap body 2, a boss 3, and a heat-shielding cylinder 7 extending upward from an opening 21 of the cap body 2. A pan bottom temperature sensor 8 protruding from an opening 7a formed in the umbrella section 5 at the top of the pan is inserted. The pan bottom temperature sensor 8 is
A spring (not shown) is urged upward by a spring (not shown) so that the temperature of the pan bottom can be detected by contacting the pan bottom. When the pan bottom reaches a predetermined temperature, the gas burner is extinguished by a signal.

By the way, the burner cap 1 described above
In the production of a, first, at the center of the cap body 2, the cylindrical portion 7 and the inner portion of the cylindrical portion 7 are formed using the molding die 10 including the upper die 10 a and the lower die 10 b shown in FIG. A semifinished product M on which a hollow convex portion 20 having a support portion 4 and an umbrella portion 5 bulging to the peripheral side is formed is forged. After the forging of the semi-finished product M, the waste meat 9 existing in the gap on the outer peripheral portion of the split surface of the upper die 10a and the lower die 10b is removed by trimming. And
The cylindrical portion 7 is cut and removed from the outer peripheral side over the entire circumference so that the support portion 4 remains, and the support portion 4 and the umbrella portion 5 are provided above the cap main body 2 as shown in FIG. Burner cap 1
a is manufactured. The cylindrical portion 7 cut and removed and the trimmed waste 9 are melted and reused as a material for a burner cap.

A second burner cap 1 shown in FIG.
In the production of b, first, a semifinished product M is forged using a molding die 10 shown in FIG. 5, and subsequently, a pot bottom temperature sensor 8 is inserted into the umbrella part 5 by a removing operation such as trimming. The opening 7a is opened. The diameter of the opening 7a is
The opening 7a may be formed by cutting off the entire umbrella portion 5 and leaving only the cylindrical portion 7.

As described above, if the portion to be cut and removed when manufacturing the first burner cap 1a is formed into a shape that can be used as the cylindrical portion 7, the convex portion 20 of the semi-finished product M having the same shape is formed. Only by opening the opening 7a in the umbrella portion 5, the second burner cap 1b including the cylindrical portion 7 for inserting the pan bottom temperature sensor can be manufactured. That is, by selecting the part to be removed by cutting, trimming, etc.,
Burner caps having different functions can be made separately from semi-finished products M of the same shape.

In the above-described two embodiments, the semi-finished product M in which the bulging portion serving as the support portion 4 is formed inside the cylindrical portion 7 of the convex portion 20 is used, as shown in FIG. FIG. 7 shows a semi-finished product M in which the column 4 is expanded outside the cylindrical portion 7.
First burner cap 1a shown in (A) and FIG. 7 (B)
The second burner cap 1b shown in FIG. In this case, the umbrella portion 5 of the first burner cap 1a is
Is formed by cutting and removing from the inside so that the support portion 4 remains.

Further, as a post-process, a process of removing the cylindrical portion 7 so that the support portion 4 remains, and a process of forming a central flame hole 2b vertically penetrating the cap body 2 from the manufactured semifinished product M. To form a first burner cap 1a having a central flame hole 2b, as shown in FIG.

Then, as a post-process, a step of forming an opening 7a through which the pan bottom temperature sensor 8 can be inserted into the umbrella portion 5 of the manufactured semi-finished product M, And forming a gap 7b serving as a secondary air outlet by removing the entirety of the cylinder 4 except for the part 4 to form a second burner cap 1b having the gap 7b at the lower end of the cylindrical part 7. Alternatively, a step of forming a central flame hole 2b vertically penetrating the cap body 2 may be performed, and as shown in FIG. 9, a second burner cap 1b having a gap 7b and a central flame hole 2b May be formed.

In this manner, the second burner cap 1
When the gap 7b is formed in b, secondary air can be supplied from the gap 7b to the gas combustion section. Even if the gap is formed in the second burner cap 1b shown in FIG.
Similar effects can be obtained.

The first burner cap 1a and the gap 7
When the central burner hole 2b penetrating the cap body 2 up and down is formed in the second burner cap 1b provided with b, the central portion such as a pot to be heated is heated by the combustion of gas ejected from the central burner hole 2b. can do. The same effect can be obtained by providing a central flame hole in the first burner cap 1a shown in FIG. 1 or the second burner cap 1b shown in FIG. 3 having a gap as a secondary air outlet.

In this embodiment, the flame holes are formed using the tooth profile 2b formed on the lower surface of the cap body 2. However, the flame holes may be formed by forming hole holes on the outer periphery of the cap body 2. Good. In the above embodiment, the semi-finished product is formed by forging, but may be formed by casting.

[0022]

As described above, according to the present invention, a part of the manufacturing process of burner caps having different shapes is shared,
The productivity can be improved and the production cost can be reduced.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a state in which a burner cap according to an embodiment of the present invention is placed on the upper surface of a burner head.

FIG. 2 is a perspective view showing the burner cap of FIG. 1;

FIG. 3 is a cross-sectional view showing a state in which a burner cap according to another embodiment of the present invention is placed on the upper surface of a burner head.

FIG. 4 is a perspective view showing the burner cap of FIG. 3;

FIG. 5 is a sectional view showing a state when a burner cap is formed.

FIG. 6 is a sectional view showing a state when another burner cap is formed.

FIG. 7 is a sectional view showing another embodiment of the burner cap of the present invention.

FIG. 8 is a sectional view showing another embodiment of the burner cap of the present invention.

FIG. 9 is a sectional view showing another embodiment of the burner cap of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1a, 1b Burner cap 2 Burner cap main body 4 Support part 5 Umbrella part 6 Outlet 7 Tube part 8 Temperature sensor 10 Mold for molding

Continuation of front page (58) Field surveyed (Int.Cl. ⁷ , DB name) F23D 14/06

Claims (3)

(57) [Claims] 1. A boiler provided on an annular cap body having a flame hole on an outer periphery thereof and a plurality of pillars extending upward from a center opening of the cap body so as to cover the center opening of the burner cap from above. A first burner cap having an umbrella portion for countermeasures, an annular cap body having a flame hole on the outer periphery, and a heat shielding tubular portion extending upward from a central opening of the cap body and inserting a pan bottom temperature sensor. A method of manufacturing a second burner cap, comprising: a hollow convex portion having the cylindrical portion and the support portion and the umbrella portion bulging to the inner peripheral side or outer peripheral side of the cylindrical portion. Manufacturing a semi-finished product common to the first burner cap and the second burner cap, which is integrally formed by forging or casting on the cap body,
Then, a first burner cap is manufactured by performing a first post-process of removing the cylindrical portion of the semi-finished product so that the support portion remains, and an opening through which a pan bottom temperature sensor can be inserted into the umbrella portion of the semi-finished product. A method for manufacturing a burner cap, wherein a second burner cap is manufactured by performing a second post-process to be formed. 2. The method according to claim 1, wherein the second post-process further includes a step of removing a lower end portion of the cylindrical portion over the entire periphery except for the support portion to form a gap as a secondary air outlet. The method for manufacturing a burner cap according to claim 1. 3. The method according to claim 1, wherein at least one of the first post-process and the second post-process further includes a step of forming a central flame hole vertically penetrating the cap body. Item 3. A method for producing a burner cap according to Item 2.