JPS592085Y2 - Mold for glass turntable - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a mold for molding a glass turntable that is applied to a microwave oven.

Generally, a glass turntable for a microwave oven is provided with a recessed engagement part in the center for radial positioning or as a connection part with a drive shaft.

However, since the end surface of the part of the mold corresponding to this recessed hole engagement part is simply a smooth surface, the cooling effect of the mold during molding is poor, and this part becomes the highest temperature, so this part The mold was severely destroyed in the area, and metal fragments from this destruction adhered to the recessed hole engagement part of the turntable during molding, which caused a discharge phenomenon during microwave irradiation and caused the turntable to heat up. do.

The present invention has been devised in view of these conventional problems, and one embodiment thereof will be described in detail below with reference to the drawings.

As shown in FIG. 1, the turntable 1 has a recessed hole engaging portion 1A provided at the center in the oven 2 engaged with a central shaft 2A for driving or positioning, and a supporting roller 3 at the peripheral edge. The turntable 1 is molded from glass using the mold shown below.

That is, as shown in FIGS. 2 to 4, the mold is composed of an upper mold 4A and a lower mold 4B, and in particular, a portion 4B corresponding to the recessed hole engaging portion 1A formed at the center of the lower mold 4B. , the end face of (
The upper surface) is provided with a jagged g...

Therefore, as shown in FIG. 2, the molten glass 1' is
is injected onto the lower mold 4B, and then the lower mold 4B and the upper mold 4A are superposed as shown in FIG. 3. As shown in FIG. An air layer 6 is formed between the molten glass 1' and the molten glass 1' due to the jagged g. The ratio of transmission to part 4B of 4B decreases dramatically.

Therefore, since the portion 4B of the lower mold 4B is not destroyed by heat, there is no concern that metal pieces of the mold will adhere to the recessed hole engaging portion 1A of the turntable 1, and as a result, microwave There is no discharge phenomenon caused by this, and there is no need for the turntable to generate heat.

In short, the present invention provides a mold for molding a glass turntable used in a microwave oven by providing a jagged edge on the end face of the part forming the recessed hole engagement part in the center of the turntable. Therefore, the mold will not be destroyed by heat during molding, and therefore, metal pieces due to mold destruction will adhere to the molded turntable, and electrical discharge will occur due to this. This is an excellent idea that eliminates any concerns that the turntable will heat up due to this phenomenon.

[Brief explanation of drawings]

Figure 1 is a schematic diagram of the main parts of a turntable molded with the mold according to the present invention installed in the open, and Figure 2 is a diagram showing the structure of a turntable molded with the mold according to the present invention, in which molten glass is injected into the lower mold of the mold according to the present invention. FIG. 3 is a state diagram in which the upper mold is superimposed after molten glass is injected into the lower mold, and FIG. 4 is an enlarged sectional view of the main part of FIG. 3. 1: turntable, 1A: recessed hole engagement part, 4A: upper mold,
4B: Lower mold, g: Jagged.

Claims (1)

[Scope of utility model registration request] A mold for molding a glass turntable used in a microwave oven, the mold having a jagged edge on the end face of a portion forming a recessed hole engaging portion in the center of the turntable.