JP2001107111A - Method and equipment for productioin of metal powder, and molding method using metal powder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method capable of performing the recycling of the scrap made by machining of castings by the use of a safe equipment while taking the protection of global environment into consideration and also capable of producing an inexpensive metal powder and developing new goods by molding the powder. SOLUTION: The scrap made by machining of castings, mostly in a state of coarse particles, is formed into a metal powder of moldable size by using, e.g. a stone mill made of natural rock in order to obtain finer metal powder. Synthetic resin in proportion of <=30% is mixed with the above metal powder to form a raw-material composition, which is manufactured into various products exhibiting the external appearance and mass like those of cast products in an ordinary-temperature atmosphere.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and apparatus for producing a metal powder for pulverizing a processing waste of a casting into a metal powder, adding a curable substance, and performing various shaping. The present invention relates to a molding method using a body and a curable substance.

[0002]

2. Description of the Related Art Conventionally, a reduction method from a liquid tank (Japanese Patent Publication No. 3-48244) has been disclosed for the production of metal powder (metal fine powder). Metal powders such as metal slag which is collected as a by-product at the time of melting and melting method at the high technology level,
This is a high-dimensional, high-level technology that is beyond the scope of the present invention, and a ball mill or the like is provided as a simple grinding device.

[0003] A molding method using a metal powder includes a powder metallurgy method in which a powder raw material is pressed and then sintered, and a thermoplastic raw material composition containing a binder in addition to fine particles of a main raw material. Sintering after removing the binder
There are some disclosures and the like, but these are not covered by the present invention.

[0004] As other manufacturing methods, there are various casting methods and a molding method in which metal is added to plastic to increase strength.

[0005]

In the conventional method, the metal powder as a main raw material is necessarily expensive because it can be produced only on a large scale and under a large capital, and its use is limited. In addition, even if a product can be manufactured, the cost of the product is affected, so that it is also expensive.

In particular, since both manufacturing and molding are performed in a high-temperature atmosphere, many waste gases and released heat are unfavorable for the global environment. The present invention overcomes these drawbacks and greatly changes the standpoint from the conventional definitions and stereotypes. However, it has the mass of the specific gravity of metal, and can produce things that play the role of heavyweight.

[0007]

According to the present invention, in the production of metal powders, the main raw material is selected by paying attention to the fact that the processing waste of castings is generally in a coarse particle state, and this is used as a base raw material. In order to obtain a metal powder having a particle size that can be more easily formed, the powder was ground using natural rock to obtain a metal powder having a particle size that can be formed.

The natural rocks used in the present invention are volcanic rocks and plutonic rocks such as andesite and granite, which contain more hard crystalline parts such as quartz and feldspar. The non-crystalline non-crystalline part of the component wears away due to wear and exposes the hard crystalline part, so that the crushed surface is regenerated and kept sharp.

[0009] The metal powder obtained by the above-mentioned means was coarse particles, although not fine particles. Is a base material from which 100% of the main material is recovered without waste.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION A curable substance such as a synthetic resin is added to this base material in an amount of 30% by weight or less, and the mixture is stirred and poured into a mold having a desired shape to perform molding. At this time, it is desirable to make the mold without applying sintering even if pressurizing, since it is a problem to consider the environment.

[0011] In the present invention, the recyclable casting processing waste is a casting such as cast iron or cast steel containing carbon, and the processing waste is limited to the one in which coarse particles are formed, and is continuous in a belt shape. Objects and sizes and shapes that cannot be called particles like a single element soul are not selected as main raw materials.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the course of processing a casting, casting processing waste as an inevitable by-product is generally produced in the form of coarse particles. This is selected as the main raw material and further ground to make fine particles, which are used as the base material metal powder. Conventionally, cast product scraps are collected at the original steel mill, then pelletized, melted in a furnace, and then placed in a cast iron ingot.

An apparatus for producing powder from natural rock is made up of two upper and lower discs, and only one of them is given a rotation about the center of the circle, just like the mechanism of an ancient millstone. Metal powder, which is processing waste of castings, was introduced instead of grain, and although the particle size was somewhat uneven, fine particles could be obtained with a small amount.

The embodiments will be described more specifically.
The metal powder obtained in the above example was irregular particles having a particle size of about 0,5 mm about 80% and about 0.05 mm about 20%. Vs. 10
When 5 kg of a raw material and a composition for molding were mixed and produced at a ratio of 1 to produce a commercially available iron array for strength training, an iron array having a slightly larger appearance but almost the same was completed.

In another embodiment, if the original product is an imitation of, for example, a heavyweight made of concrete, the finished appearance can be reduced to about one third in size.

[0016]

According to the present invention, small-scale equipment has high safety. Above all, it is environmentally friendly with little heat and waste. It is a perfect effect for recycling cast iron. The surface is hardly corroded because it is stirred with the synthetic resin. In the example, the existing product was imitated, but product development in a new field can be greatly expected.

Claims (3)

[Claims] 1. A method for producing a metal powder, wherein a metal powder is obtained by crushing a casting processing waste which is a main raw material and a base material. 2. An apparatus for producing metal powder, wherein metal processing dust is obtained using a stone mill or the like made of natural rock. 3. A molding method of a metal powder using a curable substance, wherein the raw material composition comprises 70% by weight or more and 30% by weight or less of a curable substance as a base material.