JPH048317A - Manufacture of cooking vessel - Google Patents

Abstract

PURPOSE:To damp the force applied to a coating layer and a metal material at the time of pressure-molding an indicator such as mark and prevent the generation of crack and cutting by touching a patch on the inner surface side of a vessel to conduct pressure working. CONSTITUTION:A metal material 2 having a resin coating 3 formed thereon is drawn into a vessel form with the layer inside by drawing work. Successively, it is formed into a collared pan form by stepping a collar part, and a patch 71 is touched on the surface of the resin coating 3. When an inner pot 1 is pressurized from the inner surface side to the middle by the use of a press edge 72 having the form and width corresponding to an indicator 7 from inside, the resin coating 3 and the metal material 2 are compressed in a fault form and depressed. After completion of pressurization, the patch is removed. The patch 71 interposed between the metal material 2 having the resin coating 3 and the press edge 72 damps the pressurizing force of the press edge 72. Consequently, the indicator 7 such as gauge and figure is formed in the vessel without damaging the resin coating 3.

Description

[Detailed description of the invention] Industrial application field] Generally, a resin coating of non-compatible Teflon (trade name: tetrafluoroethylene resin) is layered on the inner surface of the inner pot of an electric rice cooker. ing. The resin coating layered on the inner surface prevents cooking ingredients from "sticking" or corroding the inner pot, which occurs when cooking rice.

On the other hand, a scale is provided on the inner surface of the inner pot to indicate the appropriate water level for the amount of rice to be cooked. The number attached to the water level scale indicates the number of cups of rice measured using the measuring cup. Then, the rice is cooked after transferring the polished rice to the inner pot and adding water to the level corresponding to the number of cups of rice.

The present invention relates to a cooking container such as an inner pot of an electric rice cooker, and in particular, the inner surface is coated with resin and is provided with indicators such as scales and numbers indicating the water level, letters and symbols indicating the type of cooking, etc. This invention relates to improvements in cooking containers.

[Prior Art] FIG. 5 is an explanatory diagram of the configuration of a conventional device, in which an inner pot for an ordinary electric rice cooker is shown.

In FIG. 5, (1) is the inner pot, (2) is the metal material of the inner pot (1), (3) is the coating layer, and (4) is a scale indicating the water level. The scale (4) is made by press processing, and the inner pot (
1) Pressure is applied directly from the outside with a press blade. By applying pressure from the outside, a scale (4) protruding in an arc shape as shown in the figure is formed on the inner surface of the inner pot (1). (5
) is the rice put in the inner pot (1), and (6) is the water.

A conventional inner pot (1) with this structure is filled with polished rice (5).
After that, pour water (6) to the height of the scale (4) engraved according to the amount of rice (5). Then, the inner pot (
1) into a rice cooker (not shown) and turn on the switch, the rice cooker generates heat and the water (1) in the inner pot (1) is heated.
6) is heated and rice (5) is cooked.

[Problems to be Solved by the Invention] As described above, the inner pot (1) of the conventional rice cooker is made of a metal material (2) with a coating layer (3) uniformly layered on its surface. Then, by applying pressure directly to the outside with a press blade, the scale (4) is extruded and formed at a predetermined position on the inside surface. Therefore, during extrusion molding using a press, the extruded surface of the coating layer (3) stretches and becomes thinner. In addition, distortion often occurs in the extruded portion, resulting in cracks. For this reason, the bare metal of the metal material (2) may appear immediately after use, causing burning. Also, if cracks form, the metal material (2) will corrode through the cracks, and the coating layer (3) will be corroded.
) may become lifted and cause peeling.

In addition, the coating layer (3) may peel off if the protruding scale (4) is hit by a "rice scoop" during serving or rubbed during cleaning.

If the inner pot (
It is also possible to apply a press blade from the inner surface of 1) to create a trapezoidal depression as shown in Figure 6. However, even when formed as shown in FIG. 6, it is often the case that the number of splits and cuts is somewhat reduced, but no effective measure for preventing cracks can be obtained. In particular, if the slope is weakened and the scale (4) is displayed as a trapezoidal depression with a low height, cracks can be prevented from occurring, but the depression becomes gentle and the display of the scale (4) is unclear. There were also problems such as

The present invention was made in order to solve the problems of the conventional method of manufacturing an inner pot. The present invention is intended to realize a method of manufacturing a cooking container that absorbs force and prevents the occurrence of cracks, cuts, etc.

[Means for Solving the Problems] The present invention provides a cooking container in which a display body is provided on the inner surface of the container, which is formed into a vessel shape by layering a resin coating on a metal material. This method employs a method of manufacturing a cooking container in which a concave portion matching the shape of the display body is formed by pressure processing to display the display body.

[Operation] A plate is applied to a predetermined position of a container made of resin coated metal material and molded into a lid shape, and a concave portion matching the shape of the display body is formed from the inside by pressurizing, for example. . A contact plate interposed between the resin-coated metal material and the press blade buffers the pressing force of the press blade. As a result, indicators such as scales and numbers are formed inside the container without damaging the resin coating.

[Embodiment of the Invention] Fig. 1 is an explanatory diagram of the configuration of an electric rice cooker to which the method of the embodiment of the invention relates, and Fig. 2 is a sectional view of the inner pot. An example is given of how it is applied.

In Figure 1, (10) is the case body of the rice cooker, (1
1) is an outer pot attached to the inside of the case body 10), (12) is a sheathed rice cooking heater, and (13) is a temperature sensor. Under normal conditions, the temperature sensor (13) is set to the upper limit position by a spring. It is held and falls when a load is applied. (
14) is a heat shield plate, (15) is a latch receiver, and (16) is a plug at the end of the cord.

(20) is an outer lid provided on the upper part of the case body (10). (21) is a hinge for opening and closing the outer lid (20);
22) is a hinge shaft, (23) is a hinge spring, (24) is a latch corresponding to the latch receiver (15), and (25) is a push button. (26) is the inner lid, and (27) is the upper lid. Inner lid (
A bowl-shaped rubber gasket is attached to the upper surface of the top cover 26), and is elastically engaged with the shaft of the top cover 27) through this gasket, so that the top cover 27) is detachably attached. (31> is a can-shaped lid heater, (32) is a lid supporter. (40) is an operating unit attached to the outer lid (20), (41) is its display window, and (42) is a circuit element. is hermetically housed inside the operating section (50) with a printed board attached to it.Outside of this, the inner pot (
1), metal material (2), resin coating (3), rice (
5) and water (6) are the same as before, so they are given the same reference numerals as in Figures 5-6.

The schematic structure of the inner pot (1) related to the method of the present invention is as follows.
As shown in the figure.

Glue 7) in FIG. 2 is a display body corresponding to the scale (4) in FIGS. 5 and 6. (70) is a concave portion constituting the display body (7) and is formed on the inner surface of the inner pot (1). Recess (70)
The marks are not limited to simple points or lines for forming a scale as shown in FIG. 3, but are bored in accordance with the contour shape of the display body (7) such as characters or symbols.

The display (7) of letters and numbers such as "white rice" and "5" formed on the inner pot (1) is shown near the center of Figure 1.The display (7) such as a scale is It shows the appropriate water level line for the volume of rice depending on the type of cooking.

This inner pot (1) is attached to the outer pot (1) so that it can be taken out freely.
11).

The inner pot (1) of the electric rice cooker having such a configuration is manufactured, for example, by the following process.

First, an aluminum metal material (2) made of a circularly punched plate is etched, and a fluororesin liquid is applied to the surface. Next, the metal material (2) is heated and the coated resin is baked to form a resin coating (3). The metal material (2) on which the resin coating (3) is layered is drawn into a lid shape using a press with the layered surface facing inside. The flange is then "stamped" and the excess edges are cut off to form the flange pot as shown in FIG.

After molding, as shown in FIG. 3, a contact plate (71) is applied to the surface of the resin coating (3). For the backing plate (71), for example, an aluminum plate of about 0.1 to 0.21 is used. Then, pressure is applied halfway along the inner surface of the inner pot (1) with a press blade (72) having a shape and width corresponding to the display body (7). When pressure is applied from the inside with the press blade (72), the resin coating (3) and the metal material (2) are compressed in a tomographic manner and collapse. Once the pressure is applied, remove the plate. Recess (70
) is shown in FIG. 2 after processing. As mentioned above, the letters and numbers such as "self" and "5.6" and the linear "scale" in FIG. ).

Here, the rice (5) in the stocker is taken out while being measured with a measuring cup, and placed in a rice washing bowl for "rice polishing". Transfer the polished rice (5) to the inner pot (1), and add water (6) to the water level scale on the display (7) corresponding to the measurement in the measuring cup.
), set it in the rice cooker, cover the inner lid (26), and close the outer lid (2o).Next, pull out the cord reel and connect the plug (16) to the power outlet of TOOV, The user operates the operation section (4o) while looking at the display on the display window (52) on the top surface of the outer lid (2o) to reserve and set the meal time.

When the scheduled start time for rice cooking arrives, the microcomputer's timer activates and turns on the rice cooking heater (12) and lid heater (
31) Turn on the power. The radiant heat of the lid heater (31) is transmitted to the inner pot (
The rice (5) and water (
6), the temperature of the internal water (6) rises. When rice cooking progresses and the water boils and the water in the inner pot (1) decreases and the temperature rises rapidly, the sensor (13) is activated and the rice cooking heater (12) and lid heater (31) are automatically energized. will be stopped. As a result, the rice (5) in the inner pot (1) is cooked until it is ready to eat at the reserved time.

When the push button (25) on the outer lid (20) is pressed, the latch (2
4) comes off the latch holder (15) and the hinge spring (23)
Due to the elastic force, the outer cover (20) is rotated about the hinge shaft (22) and opened. And the freshly cooked rice is “
The meal begins when the rice is placed in a rice bowl using a rice scoop.After the meal, the inner pot (1) is removed from the rice cooker and washed using a sponge.

In addition, in the above-mentioned embodiment, the present invention is applied to the inner pot (1) of an electric rice cooker.
), but the method of the present invention can be applied not only to gas rice cookers but also to frying pans, pots, and pots coated with resin coating (3). Also,
In the embodiment, a concave portion (
Although the display body (7) is displayed in 7o), it may be displayed as a discontinuous recess N (70) such as a dotted line or broken line protruding toward the inner surface.

[Effects of the Invention] As described above, the present invention provides a method for manufacturing a cooking container in which a display body is formed by pressure processing on the inner surface of a container formed into a container shape by layering a resin coating on a metal material.
A method for manufacturing a cooking container was adopted in which a display body was formed by applying pressure to the inner surface of the container. For this reason, there is no possibility that distortion occurs in the display portion such as a recessed scale, which occurs in conventional cooking containers, resulting in cracks or cracks in the resin coating. Therefore, the metal material will not be corroded through the cracks and the resin coating will not be lifted and peeled off. Furthermore, since the contact plate buffers the pressing force and reduces processing distortion, there is no need to make the slope of the display body formed by the trapezoidal recess gentle or to make the recess shallow. Therefore, problems such as unclear display of scales, numbers, etc. do not occur.

Therefore, according to the method of the present invention, it is possible to provide a cooking container that is free from "scorching" due to peeling of the resin coating and can withstand long-term use.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram of the configuration of the embodiment method of the present invention, Fig. 2 is an explanatory diagram of the inner pot, Fig. 3 is an enlarged sectional view of a part of Fig. 2, and Fig. 4 is an explanatory diagram of the processing state. 5 and 6 are explanatory views of the structure of a cooking container according to the conventional method. In the drawing, (1) is the inner pot, (2) is the metal material, and (3) is the inner pot.
) is resin coating [coating layer] (4) is scale, (5) is rice, (6) is water, (7) is display, (10)
is the case body, (11) is the outer pot, (12) is the rice cooker, (13) is the temperature sensor, (14) is the heat shield, (15)
is the latch receiver, (16) is the plug, (20) is the outer cover, (2
1) is the hinge, (22) is the hinge shaft, (23) is the hinge spring, (24) is the latch, (25) is the push button, (2B) is the inner lid, (27) is the top lid, (31) is the lid heater , (32)
is the lid support, (40) is the operation section, (41) is the display window, (
42) is a printed board, (70) is a recess, (71) is a contact plate, and (72) is a press blade. Note that the same reference numerals in the figures indicate the same or corresponding parts.

Claims (1)

[Claims] A method for manufacturing a cooking container, in which a display body is formed on the inner surface of the container, which is formed by layering a resin coating on a metal material and forming the container, by applying pressure with a press blade. A method of manufacturing a cooking container, characterized in that the indicator is formed by applying pressure to the inner surface of the container and applying pressure with a press blade.