JPH0511015Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a cast-in product of a pipe, such as a hydraulic equipment component, in which a fluid passage is formed by encasing the pipe.

[Conventional technology]

Conventional pipe casting products are cast using a mold in which the pipe 2 is inserted into the core 1 as shown in FIG. It is made to protrude into space.

[Problem that the invention attempts to solve]

However, such conventional cast-in products3
To prevent shot from entering pipe 2 and clogging pipe 2 when performing shot blasting,
There was a problem that the tip of the pipe had to be crushed or bent.

Further, such conventional cast-in products 3 have large casting errors due to difficulty in accurately positioning the pipe 2 in the mold. Therefore, the A-A' plane and the B- plane as shown in FIG.
When cutting out surface B' and providing a "0" ring groove, threaded hole, etc. on that surface to attach a flange for external piping to be connected to pipe 2, the The dimensions of the "0" ring groove etc. must have sufficient margin for the outside diameter of the cast-in pipe. For this reason, there was a problem in that there were restrictions on arranging a large number of pipes close to each other.

[Means for solving problems]

Therefore, the present invention is a cast-in pipe product in which a lid is attached to the tip of the pipe and the pipe is cast together with the lid, and the pipe is inserted into a hole formed on the bottom of the lid, and the lid and pipe are integrated. By combining them, the above-mentioned problems can be solved.

〔Example〕

1 to 3 show embodiments of the present invention. 10 is a pipe used as a fluid passage, etc., and 11 and 11' are lids attached to the ends of the pipes. 12 is pipe 10, lid 1
This is a cast-in product made by casting 1 and 11'.

The production of a mold for such a casting 12 will be described below.

Prior to making the mold, each lid 11, 11' is
Blind holes 13, 13' are provided in a predetermined positional relationship.
A pipe 10 formed to have a predetermined shape and size for a fluid passage is inserted into the holes 13, 13' and integrally attached by welding or the like. And the lids 11, 11'
The dimensions corresponding to the thickness of the bottom plate of the blind hole (dimensions D and D' shown in Fig. 2) are embedded in the mold. Therefore, the opening of the fluid passage constituted by the pipe 10 can be accurately positioned. Furthermore, since the contact area between the casting material (lids 11, 11') and the mold can be increased, the casting material is less likely to shift from the mold.

A pipe casting product 12 shown in FIGS. 1 and 2 is cast from the mold thus made. After performing treatments such as shot blasting in the state shown in FIGS. 1 and 2, the imaginary line display area is cut, and as shown in FIG. 3, the flange mounting surface 14 for external piping connection is ``A ring groove 15, an opening hole 16, etc. are formed.

[Effect of idea]

As explained above, the cast-in product according to the present invention has a lid attached to the tip of the pipe, so
Even when shot blasting is performed, the pipe does not become clogged with shots.

Therefore, there is no need to take measures against pipe hole clogging due to shot blasting, that is, crushing or bending the tip of the pipe, thereby shortening the process from casting to shot blasting and facilitating its automation.

In addition, since the lid attached to the tip of the pipe can be rectangular or other shapes, it is difficult for the casting material (lid, pipe) to become misaligned during mold production.

Therefore, it is possible to easily form "0" ring grooves, screw holes, etc. on the lid, and to reduce casting errors. As a result, it is not necessary to allow for large casting errors, so there is no need to increase the size of the "0" ring groove.

In addition, if the pipes are complex, positioning between the ends of each pipe can be easily done with one lid, and the above effect does not require increasing the dimensions of the "0" ring groove, etc. Therefore, a large number of pipes can be cast closely together with high precision using a simple mold structure.

In addition, since the "0" ring groove etc. can be machined on the lid, it is possible to prevent the "0" ring groove etc. from becoming defective due to casting defects such as cavities, deformation, etc., improving yield. .

[Brief explanation of drawings]

1 to 3 show examples of the present invention, in which FIG. 1 is a front view of a cast-in product, FIG. 2 is a sectional view taken along the - arrow in FIG. An example of processing wrapped products is shown. 4 and 5 show conventional examples. 10...pipe, 11, 11'...lid, 12...
...cast-in product, 13,13'...blind hole (hole).

Claims (1)

[Claims for Utility Model Registration] (1) A cast-in product of a pipe in which a lid is attached to the tip of the pipe and the pipe is cast together with the lid, the lid having a bottom surface larger than the outer diameter of the tip of the pipe; A cast-in pipe product, characterized in that the pipe is inserted into a hole formed in the bottom surface, and the lid and the pipe are integrally connected. (2) Claim 1 of the utility model registration characterized in that there are a plurality of pipes, a plurality of holes are formed in the lid corresponding to the number of pipes, and a pipe is inserted into each hole. cast-in products for pipes.