JPH055254U - Mold manufacturing method - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a mold manufacturing method capable of significantly improving mold molding efficiency without deteriorating the mold and polluting the environment. [Structure] When manufacturing a sand mold using a foamed resin model, the other surface of the foamed resin model other than the one having the largest surface area is embedded in foundry sand, and the sand mold is irradiated with microwaves for foaming. A mold manufacturing method in which a foamed resin model is taken out of a mold after softening and reducing the resin model.

Description

[Detailed description of the device]

[0001]

[Industrial application]

 The present invention relates to a mold manufacturing method suitable for manufacturing a sand mold using a foamed resin model.

[0002]

[Prior Art]

 Conventionally, when a sand mold is manufactured using a foamed resin model, a method of supplying oxygen to a burner to incinerate it or melting the foamed resin model with acetone has been used.

[0003]

[Problems to be solved by the device]

 However, many problems remain in such a method. That is, in the former case, the edges of the mold become brittle due to firing, and mold breakage, sand trapping, dimensional defects, etc. are likely to occur. In the latter case, not only the surface layer of the mold is deteriorated but also the environment is polluted, and the development of new technology has been strongly desired.

The present invention has been made in view of the above problems, and an object of the present invention is to significantly improve the molding efficiency of a mold without degrading the mold and polluting the environment. A mold manufacturing method is provided.

[0005]

[Means for Solving the Problems]

 According to the mold making method of the present invention, when manufacturing a sand mold using a foamed resin model, the surface other than the one having the maximum surface area of the foamed resin model is buried in the molding sand, and the sand mold is subjected to microwave. Is irradiated to soften and reduce the foamed resin model, and then the foamed resin model is taken out from the mold.

[0006]

【Example】

 Hereinafter, embodiments of the present invention will be described in more detail with reference to the drawings. FIG. 1 is a bird's eye view of the mold. A 100 mm (length) × 50 mm (width) × 50 mm (height) foam resin model is embedded in a 150 mm (length) × 100 mm (width) × 150 mm (height) mold, and in this state, the frequency is 2450 MHz. When a microwave with an output of 600 W was applied for 6 minutes, the roller foam resin model contracted and a gap of about 1.5 mm was formed between the model and the mold. Here, a foamed resin model was taken out to manufacture a mold 2 having a cavity 1.

[0007]

[Effect of the device]

 As is clear from the above description, the mold manufacturing method of the present invention does not deteriorate the mold, does not pollute the environment, and can greatly improve the mold molding efficiency and quality, and thus is industrially significant. It has an effect.

[Brief description of drawings]

FIG. 1 is a bird's-eye view of a mold.

[Explanation of symbols]

 1 cavity 2 mold

Claims (1)

[Claims for utility model registration] When manufacturing a sand mold using a foamed resin model,
The other surface than the one having the maximum surface area of the foamed resin model is embedded in foundry sand, and the sand mold is irradiated with microwaves to soften and reduce the foamed resin model, and then the foamed resin model is removed from the mold. A mold manufacturing method characterized by taking out.