JP2763671B2 - Disappearance model for casting drainage collecting pipe - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a foamed synthetic resin vanishing model for casting drainage collecting pipes.

(Prior Art) In general, a drainage pipe is larger than a drainage pipe in which a drainage pipe joint is provided at both ends in the pipe axis direction and one or a plurality of branch pipe receiving ports are provided in a direction orthogonal to the pipe axis. A large diameter portion is provided, and a tapered tube portion is provided below the large diameter portion. Some of the collecting pipes are provided with straightening vanes on the inner peripheral surface of the tapered pipe portion.

Conventionally, for casting the above-mentioned collecting pipe, a disappearing model made of a foamed synthetic resin such as expanded polystyrene is buried in molding sand (dry sand) to form a mold, and molten metal is injected into the disappearing model. A method of casting a casting by burning and evaporating the model and replacing the model with molten metal, that is, a full mold casting method is employed. In general, the disappearing model is integrally molded by injecting and foaming a foamed synthetic resin material into a molding die, but a complicated portion such as a rectifying blade or the like that cannot be removed is bonded after molding the main body model. It is adhered by the agent.

(Problems to be Solved by the Invention) By the way, the drainage collecting pipe has many types of branch pipe receiving ports and various branch pipe joining directions, and therefore requires a large number of molding dies for molding a wide variety of models. The management is troublesome, and it is a factor of increasing the cost of forming the model.

The present invention has been made in view of the above situation, and has as its object the ability to mold a model having a wide variety of branch pipe receptacles with a minimum model molding die. It is an object of the present invention to provide a vanishing model for casting a drainage pipe, which can provide a degree of freedom in selection and can reduce the cost of forming a model and simplify management.

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

That is, a characteristic of the vanishing model for casting of the drainage collecting pipe of the present invention is that a foamed synthetic resin having drainage riser joints provided at both ends in the pipe axis direction and having a large-diameter portion at an intermediate part in the pipe axis direction. A plurality of branch pipe receiving connection holes are formed in a large diameter portion of the model body, and an adhesive seat provided around each connection hole has a foamed synthetic resin for closing the connection hole. Any one of a plurality of types of branch pipe receptacles made of foam synthetic resin is selectively adhered, and the model body is vertically divided into two parts under the large-diameter branch pipe receptacle. The point is that they are formed individually and then adhered to each other to be integrated.

The model body is vertically divided into an upper body and a lower body, and an outer flange-shaped adhesive seat is formed at a lower end of the upper body so as to protrude outward in a radial direction of the pipe. Preferably, an outward flange-shaped adhesive seat protruding outward in the radial direction of the tube is formed, and the adhesive seats are preferably adhered to each other.

(Operation) According to the present invention, the model body 2, the various branch pipe receiving ports 3, and the closing lids 4 are individually formed by a molding die, and the required bonding seats 11 of the branch pipe receiving port connection holes 10 of the model body 2 are provided. Branch pipe socket 3
And the closing lid 4 is selectively combined, bonded and integrated with an adhesive, and a variety of disappearing models can be completed easily and at low cost. Furthermore, in the present invention, since the model body is formed by dividing the upper and lower parts of the large-diameter branch pipe receiving port vertically into two parts and then bonding them together, they are integrated with each other. The mold can be easily removed, and the combination of the lower body with and without the blades can be freely selected.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.

1 and 2 show one 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 includes a model body 2, a branch pipe receiving port 3, and a closing lid 4. After being individually molded, they are mutually bonded and integrated with an adhesive.

As shown in FIGS. 3 to 6, the model body 2 is provided with drainage riser joints 5 and 6 at both ends in the axial direction, and has a larger diameter than the drainage riser at the upper part. A large portion 7 is provided, and a tapered tube portion 8 is formed between the large diameter portion 7 and the lower standpipe joint 6. An inward flange 9 is provided on the inner surface of the boundary between the upper standing pipe joint portion 5 and the large-diameter portion 7, and the large-diameter portion 7 below the inward flange 9 has branches having the same diameter in three directions orthogonal to the pipe axis. A pipe port connecting hole 10 and a circular flat branch pipe port bonding seat 11 are provided orthogonal to each other. The large-diameter portion 7 is vertically divided into two parts below the adhesive seat 11 at a plane perpendicular to the tube axis. After the upper body 2a and the lower body 2b are individually formed, they are bonded to each other with an adhesive. Be integrated. The upper and lower body parts 2a and 2b constituting the model body 2 are formed in a circular shape. The outer peripheral edges of the divided body parts are extended outward to form outward flange-shaped adhesive seats 12 and 13, so that the area of the adhesive part is increased, It aims to prevent defects. The outward flange-shaped adhesive seats 12 and 13 can be used as receiving seats for installation hardware when installing the drainage collecting pipe.

Further, as shown in FIGS. 4 to 7, the lower body 2b
The blade 14 is provided on the inner surface thereof from the large-diameter portion 7 to the lower portion of the tapered tube portion 8, and is inclined with respect to the tube axis. The die can be easily removed, and the blades 14 can be integrally formed without bonding. In addition, the lower body 2b is formed with no wings 14, and if necessary, a lower body 2b with or without wings is selected and joined with the upper body 2a to form a kind of upper body 2a. Thus, two types of model bodies 2 can be formed.

The branch pipe receptacle 3 includes a curved tubular branch pipe receptacle 3a shown in FIG. 1 and a straight tubular branch pipe receptacle 3b, 3 shown in FIG. 8 to FIG.
c, 3d, which are selectively combined as appropriate. As shown in FIGS. 1 and 2, the branch pipe receiving port 3a has a curved tubular shape, and has a branch pipe receiving adhesive seat 11 of the upper body 2a at one open end.
Is provided eccentrically, and a branch pipe joining flange 16 is formed at the other open end. The branch pipe port 3b is a straight tube as shown in FIGS. 2 and 8, and has an adhesive portion 17 at one open end that matches the branch pipe port adhesive seat 11 of the upper body 2a. An inward flange-shaped water guide plate 18 protrudes except for the lower side, and a branch pipe joining flange portion 19 is formed at the other open end. The branch pipe port 3c is the ninth
As shown in the figure, a receiving pipe diameter is slightly small, and an adhesive part 20 corresponding to the branch pipe receiving adhesive seat 11 of the upper body 2a is eccentrically provided at one open end, and a lower part is provided on the inner surface thereof. An inward flange-shaped water guide plate 21 protrudes except for the side, and a branch pipe joining flange portion 22 is formed at the other open end. further,
As shown in FIG. 10, the branch pipe receiving port 3d is a straight pipe having a small receiving port diameter, and an adhesive portion 23 corresponding to the branch pipe receiving adhesive seat 11 of the upper body 2a is eccentrically provided at one open end. At the same time, an inward flange-shaped water guide plate 24 protrudes from the inner surface except for the lower side, and a branch pipe joining flange portion 25 is provided at the other open end.

The closing lid 4 closes the branch pipe receiving port 3 when the branch pipe receiving port 3 is not bonded to the branch pipe receiving port connection hole 10 of the upper body 2a.
As shown in FIG. 11, the branch pipe receiving adhesive seat 11 of the upper body 2a is provided.
And a disk shape that matches

In the above embodiment of the present invention, the upper and lower torso 2a, 2b constituting the model body 2 as well as the branch pipe receiving ports 3a to 3d,
The closing lid 4 is formed by a separate molding die, and the model body 2 and the various branch pipe receiving ports 3 are selectively combined, and the respective bonding portions 15, 17, 20, and 23 are attached to the bonding seat 11. It is bonded and integrated with an adhesive to complete the drainage pipe disappearance model 1, and various types of models can be formed.

(Effect of the Invention) A model body 2 made of a foamed synthetic resin and provided with drainage riser joints 5 and 6 at both ends in the tube axis direction and a large-diameter portion 7 at an intermediate portion in the tube axis direction is provided. A plurality of branch pipe receiving connection holes 10 are formed in the large diameter portion 7 of FIG. 2, and an adhesive seat 11 provided around each of the connection holes 10 has a closing cover made of a foamed synthetic resin for closing the connection holes 10. 4 and one of a plurality of types of branch pipe receptacles 3 made of a foamed synthetic resin are selectively bonded to each other, so that a variety of branch pipe receptacles 3 with a minimum model molding die are used. Can be easily and efficiently molded, the degree of freedom in selecting the branch-shaped receptacle 3 can be obtained, and it is possible to simplify the model management and reduce the model molding cost. Furthermore, in the present invention, since the model body is formed by dividing the upper and lower parts of the large-diameter branch pipe receiving port vertically into two parts and then bonding them together, they are integrated with each other. It is easy to remove the shape, and it is possible to freely select a combination of the lower body with and without the blades, thereby reducing the cost.

[Brief description of the drawings]

The drawings show an embodiment of the present invention. FIG. 1 is a central longitudinal sectional view (sectional view taken along line AA in FIG. 2), FIG. 2 is a plan view, FIG. 3 is a central longitudinal sectional view of a model body, FIG. 4 is a plan view of FIG. 3,
FIG. 5 is a sectional view taken along the line BB of FIG. 3, and FIG.
7 is a sectional view taken along line DD of FIG. 6, FIG.
(A), (b), and (c) are front views of the branch pipe receptacle, EE cross-sectional views and FF cross-sectional views, and FIGS. 9 (a), (b), and (c) are front views of other branch pipe receptacles. Fig. 10, GG sectional view and HH sectional view Fig. 10 (a), (b) and (c) are a front view of another branch pipe receptacle, II sectional view, JJ sectional view, and 11th sectional view. Figure (a)
(B) is a front view and a central vertical cross-sectional view of the closing lid. DESCRIPTION OF SYMBOLS 1 ... Disappearance model, 2 ... Model body, 3 ... Branch pipe receiving port, 4 ... Branch pipe receiving port connection hole blocking lid, 5, 6 ... Drainage riser junction, 7 ... Large diameter part, 10 ... Branch pipe receiving port connection hole, 11… Adhesive seat.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Kazunori Uemura 7-22, Minamienkajima, Taisho-ku, Osaka City, Osaka Prefecture Inside the Kubota Enkajima Plant (72) Inventor Takayuki Toyama Minami Taisho-ku, Osaka-shi, Osaka No. 7-22, Enkajima Kubota Enkajima Plant (56) References JP-A-60-73190 (JP, A) JP-A-64-65386 (JP, A) JP-A-1-278935 (JP) , A) Actually open sho 61-177746 (JP, U)

Claims (2)

(57) [Claims] 1. A drainage vertical pipe joint (5) at both ends in the axial direction of the pipe.
(6) is provided and a large-diameter portion (7) is provided at an intermediate portion in the pipe axis direction
A model body (2) made of a foamed synthetic resin having:
A plurality of branch pipe connection holes (10) are formed in the large diameter portion (7) of the model body (2), and an adhesive seat (11) provided around each connection hole (10) has One of a foam synthetic resin closing lid (4) for closing the connection hole (10) and a plurality of types of foam synthetic resin branch pipe receptacles (3) is selectively bonded to the model body (2). ) Is formed below the branch pipe receiving port (3) of the large-diameter portion (7), divided into upper and lower parts, individually formed, and then bonded and integrated with each other to form a drainage collecting pipe. Lost model for casting. 2. The model body (2) is vertically divided into an upper body (2a) and a lower body (2b), and protrudes from a lower end of the upper body (2a) in a radially outward direction of a tube. An outwardly facing flange-shaped adhesive seat (12) is formed, and at the upper end of the lower body (2b),
The drainage collecting pipe according to claim 1, wherein an outward flange-shaped adhesive seat (13) projecting outward in a radial direction of the pipe is formed, and the adhesive seats (12) and (13) are adhered to each other. Vanishing model for casting.