JPH04127935A - Lost foam pattern for casting drainage collecting pipe - Google Patents

Abstract

PURPOSE:To obtain multi-kinds of patterns by arranging plural connecting pieces for branch pipe receiving holes and joint seats on a body part in a lost foam pattern for casting drainage collecting pipe and providing plural kinds of the branch pipe receiving pieces and closing covers for these. CONSTITUTION:In the lost foam pattern 1 for casting collecting pipe provided with joint parts 5, 6 of drainage vertical pipes at both ends in the pipe axis direction, plural branch pipe receiving pieces 3 in the direction crossing orthogonally to the pipe axis and a diameter expanding part 7 having diameter larger than that of the drainage vertical pipe, the diameter expanding part 7 is constituted of the body part 2 having plural connecting holes 10 for branch pipe receiving pieces and the joint seats 11, plural kinds of the branch receiving pieces 3 and the closing covers 4 for closing connecting holes for the pieces 3, and to the joint seats 11, the branch pipe receiving pieces 3 or the closing covers 4 are selectively stuck to complete the pattern 1. By this method, the pattern having multi-kinds of the branch pipe receiving pieces can be easily and efficiently formed with the min. number of pattern forming metallic molds.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to a foamed synthetic resin vanishing model for casting a drainage collecting pipe.

(Prior Art) In general, a drainage collecting pipe is provided with drainage standpipe joints at both ends in the pipe axis direction, and one or more branch pipe holders in the direction orthogonal to the pipe axis from the drainage standpipe with an opening. The tube also has a large-diameter portion with a large diameter, and a tapered pipe portion continues below the large-diameter portion. Some of the collecting pipes are provided with rectifying vanes on the inner circumferential surface of the tapered pipe portion.

Conventionally, to cast the above-mentioned collecting pipes, a vanishing model made of foamed synthetic resin such as foamed polystyrene was buried in foundry sand (dry sand) to form a mold, and molten metal was poured into the vanishing model. A full mold casting method is adopted, in which the model is combusted and vaporized and the model is replaced with molten metal to cast a casting. And the disappearance model is
-For boat fishing, foamed synthetic resin material is injected into a mold and foamed to form an integral mold, but complicated parts such as rectifying blades that cannot be cut out are glued with adhesive after the main body model is molded. .

(Problems to be Solved by the Invention) By the way, in the case of drainage collecting pipes, branch pipe holders have many types of openings, and the branch pipes can be joined in various directions, so a large number of molds are required to mold a wide variety of models. This is not only troublesome to manage, but also causes an increase in model molding costs.

The present invention was made in view of the above-mentioned circumstances, and
The purpose of this is to be able to mold a wide variety of models with mouths using a minimum number of model molding molds, to allow branch pipe holders to have greater freedom in selecting the mouth, and to reduce model molding costs. An object of the present invention is to provide a disappearing model for casting of a drainage collecting pipe, which can reduce the drop and simplify management.

(Means for Solving the Problems) In the present invention, the following technical measures were taken in order to achieve the above object.

That is, the present invention provides drainage standpipe joints 5 at both ends in the pipe axial direction.
. In the disappearing model l for casting, the model 1 includes a model body 2 having a large-diameter portion 7 with a plurality of branch pipe holders having a mouth connection hole 10 and an adhesive pressure 11, and a plurality of types of branch pipe holders having a mouth 3 and a branch pipe holder. The receiver is composed of a mouth connecting hole closing lid 4, and the branch pipe holder has an adhesive pressure of 11 μm, and the model 1 can be completed by selectively adhering the opening 3 or the closing lid 4. There is.

(Function) According to the present invention, the mouth 3 and the closing lid 4 of the model body 2 and various branch pipe holders are individually molded using a mold, and the branch pipe holder of the model body 2 is formed by bonding the mouth connection hole 10. 11, the required branch pipe holder is made by selectively combining the opening 3 and the closing lid 4 and bonding them together with an adhesive, so that a wide variety of disappearing models can be easily completed at low cost.

(Example) Embodiments of the present invention will be described below based on the drawings.

FIGS. 1 and 2 show an example of a completed model of a drainage collecting pipe. The model 1 is made of a foamed synthetic resin, such as foamed polystyrene, and the model body 2, the branch pipe holder, the opening 3, and the closing lid 4. After being constructed and molded individually, they are bonded together and integrated with an adhesive.

As shown in FIGS. 3 to 6, the model body 2 is provided with drainage standpipe joints 5 and 6 at both ends in the pipe axial direction, and a drain standpipe joint 5° and a diameter larger than that of the drainage standpipe at the top. A large diameter portion 7 is provided, and a tapered pipe portion 8 is formed between the large diameter portion 7 and the lower standpipe joint portion 6.

An inward flange 9 is provided on the inner surface of the boundary between the upper standpipe joint 5 and the large-diameter portion 7, and the lower large-diameter portion 7 of the inward flange 9 has branches with the same diameter on three sides orthogonal to the pipe axis. The tube holder has a mouth connection hole 10, and the circular flat branch tube holder has an adhesive seat 11, which are provided at right angles to each other. Further, the large diameter portion 7 has the adhesive pressure 11
It is divided into upper and lower halves on a plane perpendicular to the tube axis below, and after forming an upper body 2a and a lower body 2b separately, they are bonded together with an adhesive to be integrated. The dividing surfaces of the upper and lower fuselages 2a and 2b constituting the model fuselage 2 are circular and their outer peripheries extend outward to create an outward brim-like adhesive pressure of 12.13 mm, increasing the area of the adhesive area, and making the casting process easier. Efforts are being made to prevent defects. The adhesive pressure 12 and 13 of the outward flange can be used as a seat for the installation hardware when installing the drainage collecting pipe.

Furthermore, as shown in FIGS. 4 to 7, the lower body 2b
is provided with vanes 14 on its inner surface from the large diameter part 7 to the lower part of the tapered pipe part 8, which are inclined with respect to the pipe axis.By dividing the model body 2 into upper and lower parts, the molding die can be The die cutting becomes easy, and the blades 14 can be integrally formed without adhesion. In addition, the lower body 2b is molded without the blades 14, and the lower body 2b with blades or without blades is selected as required, and by joining and integrating with the upper body 2a, a type of upper body 2a is formed. Two types of model fuselages 2 can be molded in this manner.

The branch pipe holder has the opening 3, the curved branch pipe holder shown in FIG. 1 has the opening 3a, and the straight branch pipe holder shown in FIGS. 8 to 1O has the opening 3.
b, 3c, and 3d, which are selectively combined as appropriate. The opening 3a of the branch pipe holder is shaped like a curved pipe as shown in FIGS. 1 and 2, and at one open end there is an eccentric adhesive part 15 that matches the adhesive seat 11 of the upper body 2a. A branch pipe joining flange portion 16 is formed at the other open end. The opening 3b of the branch pipe holder has a straight pipe shape as shown in FIGS. 2 and 8, and one open end has an upper body 2a.
The lateral canal bone is provided with an adhesive part 17 that matches the 0 adhesive seat 11, and an inward-flange-shaped water guide plate 18 is provided on the inner surface except for the lower side.
is provided protrudingly, and a branch pipe joining flange portion I9 is formed at the other open end. As shown in FIG. 9, the branch bone opening 3c has a straight tube shape with a slightly smaller diameter, and at one open end there is a bonding portion 20 that matches the bonding seat 11 of the upper body 2a. is eccentrically provided, and an inward-flange-shaped water guide plate 21 is provided protruding from the inner surface of the water guide plate 21 except for the lower side, and a branch pipe joining flange portion 22 is formed at the other open end. Further, as shown in FIG. 10, the branch bone opening 3d has a straight tube shape with a small diameter, and one open end has a bonding portion that matches the bonding seat 11 of the upper body 2a. 23 is eccentrically provided, and an inwardly flange-shaped water guiding plate 24 is provided on the inner surface except for the lower side, and a branch pipe joining flange portion 2 is provided at the other open end.
5 is provided.

The closing lid 4 has an opening connecting hole 10 for the branch canal bone of the upper body 2a.
The ramus bone of the upper body 2a is used to close the mouth 3 when it is not bonded, and as shown in FIG.

In the above-described embodiment of the present invention, not only the upper and lower torso 2a and 2b constituting the model torso 2 but also the branch bones are formed from the mouth 38 to
3d, the obstructing lid 4 is molded using separate molds, and the model body 2 and various branch bones are selectively combined with the mouth 3, and their respective adhesive parts 15.17, 20.23 are molded as described above. They are bonded and integrated with adhesive pressure 11 to complete the drain collecting pipe disappearing model 1, and a wide variety of models can be formed.

It should be noted that the present invention is not limited to the above-mentioned embodiment, and for example, the model body 2 can be made into one piece instead of being divided into upper and lower halves.

(Effects of the Invention) As described above, in the present invention, drainage standpipe joints 5 and 6 are provided at both ends in the tube axis direction, and an opening 3 is provided in one or more branch canal bones in a direction orthogonal to the tube axis. In the vanishing model 1 for casting of a collecting pipe made of foamed synthetic resin and equipped with a large-diameter portion 7 having a larger diameter than a drain standpipe, the model 1 has a plurality of branch pipe bones connected to the large-diameter portion 7. A model body 2 having a hole 10 and adhesive pressure 11, a mouth 3 for multiple types of branch bones, and a lid 4 for closing the mouth connection hole for the branch bones.
The present invention is characterized in that the model 1 can be completed by selectively adhering the lateral canal bone, the mouth 3 or the obstructing lid 4 to the adhesion pressure 11. With the model molding mold, a wide variety of ramus bones can be easily and efficiently molded into models with mouths 3, and the gekitauke has a degree of freedom in selecting mouths 30, which simplifies model management and molds. It is possible to reduce molding costs.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is a central longitudinal cross-sectional view (cross-sectional view taken along the line A-A in FIG. 2), FIG. 2 is a plan view, and FIG. 3 is a central vertical cross-sectional view of a model fuselage. Figure 4 is a plan view of Figure 3;
Figure 5 is a sectional view taken along line B-B in Figure 3, and Figure 6 is a cross-sectional view taken along line C in Figure 4.
-C line sectional view, Figure 7 is the D-D line sectional view of Figure 6,
Figures (a), (b), and (c) show the ramus bones as a front view of the mouth, E-E sectional view, and F-F sectional view. Figure 9 (a), (b), and (c) show other ramus bones. Figures 10 (A), (B), and (C) are a front view of the mouth, a cross-sectional view along G-G, and a cross-sectional view along H-H. J sectional view, Figure 11 (a)
(B) is a front view and a central vertical sectional view of the closure lid. 1... Disappearance model, 2... Model body, 3... Branch canal bone is mouth, 4... Branch canal bone is mouth connecting hole closure cover, 5, 6...
Drainage standpipe joint, 7... Large diameter part, 10... Branch pipe bone has mouth connection hole, 11... Bonding pressure.

Claims (1)

[Claims] (1) Larger than a drainage standpipe with drainage standpipe joints (5) and (6) provided at both ends in the pipe axis direction, and one or more branch pipe sockets (3) provided in a direction orthogonal to the pipe axis. Large diameter part (
7), the model (1) has a plurality of branch pipe socket connection holes (10) and an adhesive seat ( 11), a plurality of types of branch pipe sockets (3) and a branch pipe socket connection hole closing cover (4), and a branch pipe socket (3) or a branch pipe socket (3) on the adhesive seat (11). A disappearing model for casting of a drainage collecting pipe, characterized in that the model (1) can be completed by selectively adhering the blocking lid (4).