JPH0572926U - Degreasing body transport container - Google Patents

Abstract

(57) [Summary] [Purpose] The purpose is to suppress the occurrence of damage in transporting the degreased body to the sintering furnace. [Construction] A container used for kneading a magnetic powder and a binder, injection-molding the mixture, heating the mixture in a degreasing furnace to remove the binder and containing the degreased body, and transporting it to a sintering furnace. Sheet magnet (3) with vertical movement mechanism on the bottom of the container, or DC power supply (9) and switch (10)
The degreased body transport containers (1) and (7) are characterized by comprising an electromagnet (8) provided with.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a degreasing body transport container that can be carried without damaging a degreasing body made of a magnetic material.

[0002] In order to obtain a molded product with good dimensional accuracy using metal, it is customary to carry out cutting, but there are molded products that are hard and brittle and difficult to lathe. For example, a magnet base made of a soft magnetic material made of an iron-silicon (Fe-Si) alloy or an iron-cobalt (Fe-Co) alloy, a motor yoke, etc., are hard materials. Since it is brittle and brittle, the cutting yield is low and not practical.

On the other hand, the metal powder is mixed with an organic binder, injection-molded into a required shape, placed in a furnace, and gradually heated to decompose the organic binder into a degreased body. There is known an injection molding sintering method (MIM method, which is abbreviated as MIM method) in which a material is heated and sintered.

The present invention relates to a carrier for a degreased body used to carry the degreased body to a sintering furnace.

[0005]

[Prior Art]

 In the above MIM method, the degreasing process of decomposing the organic binder into a degreased body is generally performed using a degreasing furnace, and sintering is performed using a sintering furnace and exhausting to a high vacuum and heating to a high temperature. Is being done.

Here, the degreased body from which the organic binder has been removed has almost no binding of metal powder, and therefore has a very weak shape-retaining force and is extremely fragile against vibration and impact. Therefore, to convey the degreased body to the sintering furnace, use a plastic container with a vibration proof material on the bottom, carefully transfer the degreased body from the degreasing furnace, and then carefully convey the container to the sintering furnace. However, they are carefully attached one by one.

However, this method is unstable with respect to vibration and shock because it is not sufficiently fixed in the transport container, and the frequency of breakage is high despite caution. Therefore, a method has also been considered in which a frame-shaped recess matching the shape of the bottom surface of the degreased body is provided on the bottom surface of the container, and the degreased body is inserted into this to increase the degree of fixation.

However, this method has a problem that it is not versatile because it is necessary to prepare a plurality of types of frame-shaped depressions according to the shape of the bottom surface of the component.

[0009]

[Problems to be solved by the device]

 A transport container is used to transport the degreased body from the degreasing furnace to the sintering furnace.However, since the degreased body has extremely weak mechanical strength, it must be transferred to the transportation container and transported to the sintering furnace. The problem is that damage is likely to occur in the process of transferring to a sintering furnace, and this problem is to be solved.

[0010]

[Means for Solving the Problems]

 The above-mentioned problem is to knead the magnetic powder and the binder, and after injection molding, heat in a degreasing furnace to remove the binder, store the degreased body formed, and use it for the container used for transporting to the sintering furnace. This can be solved by constructing a degreased body transporting container characterized by comprising a sheet-like magnet having a vertically moving mechanism on the bottom surface of this container or an electromagnet having a DC power source and a switch.

[0011]

[Action]

 The present invention focuses on the fact that the MIM method is mainly used for magnetic materials.

As described above, the MIM method is intended for a material that cannot be cut because it is hard and brittle, and is often a magnetic alloy. Therefore, a magnet is provided on the bottom surface of the container as a method of securely fixing the degreased body during transportation.

Here, since the degreasing body is extremely fragile, it is necessary that the magnetic attraction force works only during transportation, and that the magnetic attraction force does not work when transferring to and from the container. ..

Therefore, the degreasing body transport container according to the present invention comprises a mechanism for moving the sheet-like magnet up and down on the bottom surface of the bottom of the container. An electromagnet, a DC power source, and a switch are provided on the bottom surface of the bottom of the container. Of any one of the above.

By taking such a measure, the degreased body is reliably fixed to the bottom of the container during transportation, and therefore damage can be suppressed without paying extreme caution as in the conventional case. ..

[0016]

【Example】

 Example 1: (Use of a sheet magnet, related to claim 2) Fig. 1 (A) is during transportation, and Fig. 1 (B) is a transportation container in a process of transferring a degreased body to a container or a sintering furnace. Shows the operation of.

That is, the frame-shaped transport container 1 made of a non-magnetic material such as plastics has a space for arranging the degreasing bodies 2 in the upper part, and a vertical moving mechanism 4 for the sheet magnet 3 in the lower part. It is equipped with.

That is, the pair of link mechanisms having the stoppers 5 allows the sheet-shaped magnet 3 to move up and down. When the degreased body 2 is transferred from the degreasing furnace to the transport container 1 and when the degreased body 2 is transferred from the transport container 1 to the sintering furnace, the sheet-shaped macnet 3 is moved as shown in FIG. By lowering the degreasing body 2 so that it is hardly affected by the magnetic field, on the other hand, during transportation, the sheet-like mcnet 3 is brought close to the degreasing body 2 for magnetic adsorption as shown in FIG. Is. Embodiment 2 (Use of Electromagnet, Related to Claim 3) FIG. 2 shows a structure of a transport container 7 according to the present invention having an electromagnet.

That is, the frame-shaped transport container 7 made of a non-magnetic material such as plastics has a space for arranging the degreasing bodies 2 in the upper part, and a plurality of (three in this figure) the lower part. It is configured by including an electromagnet 8, a DC power source 9 such as a battery, and a switch 10.

When the degreased body 2 is transferred from the degreasing furnace to the transport container 7 and when the degreased body 2 is transferred from the transport container 7 to the sintering furnace, the switch 10 is turned off to eliminate the magnetic field, and In transporting the fat body 2, the switch 10 is turned on to excite the coil of the electromagnet 8 to magnetically adsorb the fat body 2.

[0021]

[Effect of the device]

 By using the transport container according to the present invention, it is possible to fix the degreased body to the container without paying the utmost care when transporting the degreased body as in the conventional case, thereby improving the manufacturing yield. You can

[Brief description of drawings]

FIG. 1 is a front view of a transportation container using a sheet-shaped magnet according to the present invention.

FIG. 2 is a front view of a transportation container using a magnet according to the present invention.

[Explanation of symbols]

 1,7 Transport container 2 Degreasing body 3 Sheet magnet 4 Vertical movement mechanism 8 Electromagnet 9 DC power supply 10 Switch

Claims (3)

[Scope of utility model registration request] 1. A transport container used for carrying a kneaded magnetic powder and a binder, injection-molding the mixture, heating the mixture in a degreasing furnace, removing the binder, and containing the degreased body, and transporting the degreased body to a sintering furnace. The degreasing body transport container (1), characterized in that a magnet with a variable magnetic force is provided on the bottom surface of the container.
(7). 2. The degreasing body transport container (1), wherein the magnet with variable magnetic force is a sheet-like magnet (3) having a vertical movement mechanism. 3. A degreasing carrier (7) characterized in that the magnet with variable magnetic force is an electromagnet (8) equipped with a DC power supply (9) and a switch (10).