JPH0399745A - Manufacture of powder container - Google Patents

Abstract

PURPOSE:To obtain a product having satisfactory strength and quality by forming a bottomed cylindrical forged body having fins in its inner part, cutting off the upper parts of the fins, then, forming the neck part by drawing on the upper part of the forged body and forming a thread part on this neck part. CONSTITUTION:The bottomed cylindrical forged body 13 is obtained by drawing with plural fins 5 turning to the center from the inner wall of the container body 1. The upper parts of the fins 5 are removed by cutting and the shoulder part 2 and the neck part 3 are formed by drawing on the upper part of the forged body 13. After it is heattreated, a thread part 4 is formed by machining on the outer periphery of the neck part 3. On one hand, after the outer shape of the cover is formed by forging, the cover is heattreated, then, the thread part, the through hole, etc., are formed by machining, an equalizing element, a retaining ring, etc., are fitted to complete the container.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention mainly relates to a method of manufacturing a container for storing or discharging radioactive substance powder, and in particular, it relates to a method for manufacturing a container for storing or discharging radioactive substance powder, and in particular, it relates to a method for manufacturing a container for storing or discharging radioactive substance powder, and in particular, for The present invention relates to a method of manufacturing a powder container in which radial fins are formed toward the center.

[Conventional technology]

Generally, when storing radioactive substance powders such as Pulp dioxide, which generate internal heat due to self-decay heat even during storage, feed materials such as aluminum with good thermal conductivity are used. Use No. 2 A storage container is used.

In addition, in the work involved in filling or discharging radioactive material powder into storage containers, it is necessary to prevent workers from being exposed to radiation, especially since they are handling radioactive materials, and safety and strict quality control of radioactive material powder must be carried out. is emphasized.

[Problem to be solved by the invention]

By the way, conventionally, this type of powder container has a cylindrical container body with a bottom, radial fins are formed from the inner wall toward the center, and a lid is removably attached to the top of the container body. This is known (see Japanese Utility Model Application Publication No. 172518/1983).

However, in the conventional powder container described above, since heat removal fins are formed within the container body, there is a problem in manufacturing that it is difficult to obtain a product of desired quality.

In other words, possible methods for manufacturing the container body include assembling each part by welding, brazing, etc., or manufacturing it integrally by casting. While it is difficult to ensure the reliability of the parts and it is necessary to conduct various inspections during manufacturing, the latter method tends to create cavities within the container body, making it difficult to obtain sufficient strength. Another problem is that the mold is expensive, which increases production costs.

The present invention has been made in view of the above circumstances, and its purpose is to easily and reliably produce a bottomed cylindrical container body with internal fins. ,
It is an object of the present invention to provide a method for manufacturing a powder container that can smoothly manufacture a product of good quality at a relatively low cost.

[Failure to solve the problem]

In order to achieve the above object, the method for manufacturing a powder container of the present invention involves forming a bottomed cylindrical forged body having fins inside by forging, and then cutting off the upper part of the fin in this forged body by machining. After that, a neck is formed in the upper part of the two-part forged body by drawing, and a threaded part is further formed in this neck by machining.

[Effect]

In the method for manufacturing a powder container of the present invention, a cylindrical forged body with a bottom is formed by casting, radial fins are integrally formed inside, and then the upper part of the two-part fin is cut off. Then, by drawing the neck part and machining the threaded part, a product with sufficient strength and quality is obtained.

〔Example〕

Hereinafter, one embodiment of the present invention will be explained based on FIGS. 1 to 5.

Figures 1 to 4 show the procedure for manufacturing the container body, and the powder container manufactured by this procedure is
As shown in the figure, the second part of the bottomed cylindrical container body 1 is
The diameter of the shoulder portion 2 is reduced into a funnel shape, and the neck portion 3 is formed into a tapered shape. A threaded portion 4 is formed on the outer periphery of the neck portion 3. Further, inside the container body 1, a plurality of (for example, eight) radial fins 5 are formed from the inner wall below the shoulder portion 2 toward the center. And these fins 5'
A tapered part 6 is formed on the center side of the second part. moreover,
A lid 7 is screwed into the threaded portion 4 of the container body I, and a through hole 8 is formed at the top and bottom in the center of this M7.

A pressure equalizing element 9 made of sintered metal is attached to the through hole 8 by a fastener IO. Furthermore, a flap 11 is formed at the lower end of the lid 7, and an O-ring 12 is mounted inside the cap M7 at a position facing the neck 3 of the container body 1.

Note that the container body I and the lid 7 are each made of an aluminum alloy.

When manufacturing the container body 1 configured as described above, first, as shown in FIG. 74 Ru. Next, the upper part of the fin 5 of this forged body 13 is removed by cutting, as shown in FIG. Subsequently, as shown in FIG. 3, a shoulder portion 2 and a neck portion 3 are formed on the upper portion of the forged body 13 by drawing. Furthermore, after heat treatment, the outer periphery of the biradical part 3 is coated with
The threaded portion 4 is formed by machining.

On the other hand, after forming the outer shape of the lid 7 by forging,
Heat treatment is performed, and then the through holes etc. of the threaded portion 2 are formed by machining, and the pressure equalizing element 9. Retaining ring ■
Complete by installing 0,0 ring 12 etc.

〔Effect of the invention〕

As explained above, the method for manufacturing a powder container of the present invention includes:
Forming a bottomed cylindrical forged body with fins inside by forging, then cutting off the upper part of the fin in this forged body by machining, and then forming a neck part in the upper part of the forged body by drawing, Furthermore, since the threaded part is formed in this neck part by machining, by forming a bottomed cylindrical forged body by casting, radial fins are integrally formed inside, and then the above-mentioned fins are By cutting out the two parts, drawing the neck part, and machining the threaded part, we can obtain a product that has sufficient strength and quality, resulting in a bottomed cylindrical container with internal fins. The main body can be manufactured easily and reliably, and a highly reliable product can be manufactured at a relatively low cost.

[Brief explanation of drawings]

1 to 5 show an embodiment of the present invention,
Figure 1 is a cross-sectional view of the forged body, Figure 2 is a cross-sectional view with the upper part of the fin removed, Figure 3 is a cross-sectional view showing the neck drawing process, and Figure 4 is a cross-sectional view with the threaded part formed. FIG. 5 is a front view showing an example of a powder container. 1... Container body, 3... Neck, 4... Screw part, 5
...Fin, 13...Forged body.

Claims (1)

[Scope of Claim] A method for manufacturing a powder container in which a plurality of radial fins are formed from the inner wall of a container body in the shape of a cylinder with a bottom toward the center, the bottom cylinder having fins inside by forging. A shaped forged body is formed, and then the upper part of the fin in this forged body is cut out by machining, a neck is formed in the upper part of the forged body by drawing, and a threaded part is formed in this neck by machining. A method for manufacturing a powder container, characterized by forming a powder container.