JPH09157708A - Apparatus for producing long-sized cylindrical pipe made by hot isostatic press - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an apparatus for producing a long-sized cylindrical pipe made by HIP with which a uniform spacing may be assured between a back metal and an inner metal even if the metallic capsule of a composite cylinder made by HIP is made to be a longer length. SOLUTION: This apparatus is constituted to from a lining layer by inserting the inner metal 2 which is a core material into the inner side of the back metal 1 having a cylindrical shape, assuring a powder packing region 3 between the back metal 1 and the inner metal 2, packing the powder for forming the lining layer into the powder packing region 3 and subjecting the power to an HIP treatment. In such a case, plural pieces each of adjusting pins 6 are mounted at the top end in the axial direction of the inner metal 2 and adjusting pine 7 at least at one point in the intermediate part apart equal intervals spaced respectively in the circumferential direction and the inner metal 2 is arranged into the back metal 1, by which the uniform spacing is formed between the back metal 1 and the inner metal 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for producing a long cylindrical tube made of a hot isostatic press (hereinafter referred to as "HIP"), and more specifically, pellets or powders of resin, metal powder, ceramics or the like. The present invention relates to an apparatus for producing a HIP long cylindrical tube which is a metal capsule for producing a HIP composite cylinder used as a heating cylinder of an injection molding machine or an extrusion molding machine for obtaining a molded product from a material.

[0002]

2. Description of the Related Art In order to manufacture a metal capsule of a HIP composite cylinder, the conventional technique shown in FIG. 3 and FIGS.
There is a technology as shown in.

As shown in these figures, in a metal capsule of a HIP composite cylinder, an inner metal 2 serving as a core material is inserted inside a back metal 1 having a cylindrical shape, and a space between the back metal 1 and the inner metal 2 is inserted. First, the powder filling region 3 for filling the powder for forming the lining layer after HIP is secured.

By the way, in order to obtain a lining layer having a uniform thickness after HIP, it is important to design and manufacture such that the gaps in the powder filling region 3 are uniform.

Therefore, in the prior art shown in FIG.
By holding the inner metal 2 by the lower lid 5 and the lower lid 5, the uniformity of the gap is ensured.

In the prior art shown in FIGS. 4 and 5, the adjusting pin 6 attached to the upper end of the inner metal 2 is used.
And by holding the inner metal 2 with the lower lid 5,
The uniformity of the gap is ensured.

On the other hand, in order to reduce the manufacturing cost of the HIP composite cylinder, a technique of taking a plurality of products from one long metal capsule is used. To do this, it is necessary to lengthen the metal capsule according to the product length. Then, in order to obtain a lining layer having a uniform thickness, how to ensure the uniformity of the powder filling region 3 is important.

[0008]

However, in both the prior art shown in FIG. 3 and the prior art shown in FIGS. 4 and 5, the gap between the back metal 1 and the inner metal 2 is uniform because the metal capsule is Since there is only the upper end and the lower end, when the metal capsule is elongated, if the inner metal 2 has a warp, the powder 3'is in an unevenly filled state as shown in FIG. When HIP processing is performed in this state,
The thickness of the lining layer in the final product becomes uneven,
Product value decreases.

As the metal capsule is made longer,
Since it becomes difficult to secure the straightness of the inner metal 2, the influence of the warp becomes significant, and in an extreme case, the thickness of the lining layer is insufficient, and it may be impossible to take a product.

The problem to be solved by the present invention is that HIP
An object of the present invention is to provide a manufacturing apparatus for a long HIP cylindrical tube that can secure a uniform gap between the back metal and the inner metal even when the length of the metal capsule of the manufactured composite cylinder is increased.

Another object to be solved by the present invention is to provide an apparatus for producing a long HIP cylindrical tube capable of easily taking a plurality of HIP composite cylinders from a long metal capsule. .

Still another object of the present invention is to provide a manufacturing apparatus for a long HIP cylindrical tube which can form a lining layer uniformly over the entire length of a long HIP composite cylinder.

[0013]

In order to solve the above-mentioned problems, according to the present invention, a gap is adjusted in the axially upper end portion of the inner metal and at least one of the intermediate portions thereof at equal intervals in the circumferential direction. Attach multiple adjustment pins for each,
The inner metal is arranged in the back metal to form a uniform gap between the back metal and the inner metal.

Further, in order to solve the above-mentioned problems, in the present invention, the mounting position of the adjusting pin at the intermediate portion in the axial direction of the inner metal is set to the cutting position of the long metal capsule.

Further, in order to solve the above problems, in the present invention, the adjustment pin is made of the same material as that of the lining layer to be formed.

[0016]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a vertical sectional view showing an embodiment of the present invention, and FIG. 2 is a sectional view taken along the line AA of FIG.

The embodiment shown in FIGS. 1 and 2 shows a case where two products are taken from one long metal capsule, and a cylindrical back metal 1 made of a material such as SCM440 is used. The inner metal 2 made of a material such as SS41 is inserted inside. An upper lid 4 is attached to the upper end of the back metal 1 and a lower lid 5 is fixed to the lower end.

An adjustment pin 6 is attached to the upper end of the inner metal 2 in the axial direction, and an adjustment pin 7 is attached to the intermediate portion corresponding to the cutting position of the product. The adjusting pins 6 and 7 are made of a commercially available material such as S20C. Further, the adjusting pins 6 and 7 are each 1 in the circumferential direction.
Three pieces are attached at intervals of 80 °, and the adjusting pins 6 and 7 are provided so that the protruding lengths thereof are the same.

The lower end of the inner metal 2 is screwed into the lower lid 5 fixed to the lower end of the back metal 1 to be supported coaxially with the inner diameter of the back metal 1, and the axially middle part thereof is a circle. It is held concentrically with the inner diameter of the back metal 1 by three adjusting pins 7 which are equally spaced in the direction and have the same length, and the upper end is also equally spaced in the circumferential direction and has the same length. It is held coaxially with the inner diameter of the back metal 1 by the three adjusting pins 6 provided. As a result, a uniform gap is secured as the powder filling region 3 between the back metal 1 and the inner metal 2.

The powder filling region 3 formed between the back metal 1 and the inner metal 2 is filled with a powder for forming a lining layer, such as a cobalt alloy powder, and a HIP process is performed. After such HIP, a lining layer having a uniform thickness is formed.

After forming a lining layer on the inner diameter side of the back metal 1, a long metal capsule is placed on the inner metal 2
At the position of the adjusting pin 7 attached to the intermediate portion of the above, and further, the adjusting pin 7 is cut as a cutting allowance to obtain a product HIP composite cylinder.

When a long metal capsule is manufactured and three or more HIP compound cylinders are formed, the mounting position of the adjusting pin 7 at the intermediate portion in the axial direction of the inner metal 2 is increased. .

In the embodiment described above, the adjustment pin 6 is attached to the upper end of the inner metal 2 in the axial direction, and the adjustment pin 7 is also attached to the middle part of the back metal 1.
Since the powder filling region 3 which is a uniform gap can be secured between the inner metal 2 and the inner metal 2, it is possible to lengthen the metal capsule and form a lining layer having a uniform thickness, thus improving the yield. It is possible to obtain a HIP-made composite cylinder that can be used for a long period of time.

In this embodiment, the inner metal 2
The mounting position of the adjustment pin 7 at the intermediate portion in the axial direction is set to the cutting position of the long metal capsule, and the adjustment pin 7 is cut as a cutting allowance so that the HIP composite is cut from the long metal capsule. It is possible to easily take a plurality of cylinders and reduce the manufacturing cost.

Moreover, if the adjusting pins 6 and 7 are made of the same material as the lining layer formed after HIP,
Even with a long HIP-made composite cylinder, it is possible to obtain a product in which the thickness of the lining layer is uniform over the entire length.

[0027]

As described above, according to the first aspect of the present invention,
In the invention described above, the adjustment pin is attached to the upper end portion in the axial direction of the inner metal, and the adjustment pin is also attached to the middle portion, so that the powder filling region, which is a uniform gap, can be secured between the back metal and the inner metal. Therefore, there is an effect that a lining layer having a uniform thickness can be formed after the length of the metal capsule is increased, and thus an yield can be increased, and a HIP composite cylinder that can be used for a long time is manufactured. There is an effect to obtain.

Further, in the invention according to claim 2 of the present invention,
The mounting position of the adjustment pin at the middle portion in the axial direction of the inner metal is set to the cutting position of the long metal capsule, and the adjustment pin is cut as a cutting allowance so that the HIP composite is cut from the long metal capsule. Since it is possible to easily take a plurality of cylinders, it is possible to form a uniform lining layer and reduce the manufacturing cost.

Further, in the invention according to claim 3 of the present invention, since the adjusting pin is made of the same material as that of the lining layer formed after HIP, even a long HIP composite cylinder. Thus, there is an effect that a product having a uniform lining layer thickness over the entire length can be obtained.

[Brief description of the drawings]

FIG. 1 is a vertical sectional view showing an embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a vertical sectional view showing a conventional technique.

FIG. 4 is a vertical cross-sectional view showing another conventional technique.

FIG. 5 is a sectional view taken along line BB of FIG. 4;

FIG. 6 is a vertical cross-sectional view showing that the powder filling region becomes non-uniform when the inner metal has a warp in the prior art.

[Explanation of symbols]

 1 Back Metal 2 Inner Metal 3 Powder Filling Area 4 Upper Lid 5 Lower Lid 6 Adjustment Pin Provided at Upper End of Inner Metal 7 Adjustment Pin Provided at Middle of Inner Metal

Claims (3)

[Claims] 1. Inside a back metal having a cylindrical shape,
Insert the inner metal inner core, secure a powder filling region between the back metal and the inner metal, fill the powder filling region with the powder for forming the lining layer, press hot isostatic pressing, lining layer In an apparatus for producing a long cylindrical pipe made of a hot isostatic press, the gap adjustment is performed at equal intervals in the circumferential direction at the axial upper end of the inner metal and at least one intermediate portion. A plurality of adjustment pins for each are attached, the inner metal is arranged in the back metal, and a uniform gap is formed between the back metal and the inner metal.
An apparatus for producing a long cylindrical tube made of a hot isostatic press, which is characterized in that 2. A long metal capsule having a lining layer formed by a hot isostatic press is formed in a gap between the back metal and the inner metal, and the long metal capsule is cut at a predetermined position to obtain a hot In a manufacturing apparatus for a hot isostatic press long cylindrical pipe that takes a plurality of hydrostatic press composite cylinders, the inner metal axial adjustment pin is attached to the inner metal by cutting the long metal capsule. The apparatus for producing a long cylindrical pipe made of a hot isostatic press according to claim 1, wherein the apparatus is set at a position. 3. The apparatus for manufacturing a long cylindrical pipe made of a hot isostatic press according to claim 1, wherein the adjusting pin is made of the same material as that of the lining layer to be formed.