CN216938281U - Lost foam structure for casting large-size special-shaped cast iron pipe - Google Patents

Abstract

The utility model relates to an lost foam structure for casting a large-volume special-shaped cast iron pipe. The lost foam body is provided with a support structure inside the lost foam body. The support structure includes a middle support column, and the upper part of the middle support column is provided with a support structure. There is a first support rod group, the lower part of the middle support column is provided with a second support rod group, and the lower end of the middle support column is also provided with a glass fiber rod group, the first support rod group, the second support rod group, the glass fiber rod group The respective outer ends of the rod groups are bonded and connected with the inner wall of the lost foam body; the utility model provides convenience for the casting and molding of various large-sized cast iron pipe workpieces by designing a new structure of lost foam. At the same time, the forming quality of this type of cast iron pipe workpiece is also improved to a certain extent, and the lost foam structure of the utility model is not easy to be deformed and damaged by setting the relevant internal structure, and has good practical use and promotion value. .

Description

A Lost Foam Structure for Casting Large Volume Special-shaped Cast Iron Pipes

technical field

The utility model relates to the technical field of cast iron pipe casting mould products, in particular to a lost foam structure used for casting large volume special-shaped cast iron pipes.

Background technique

In the production process of large-volume special-shaped cast iron pipes, since these types of pipe fittings are relatively large in size and belong to special-shaped parts, not regular pipe bodies, when casting by traditional casting methods, it is easy to lead to certain parts of the casting. There are large forming defects and quality problems in some parts, and it is very troublesome for such large-sized cast iron pipe workpieces to be cast with ordinary sand cavities, which is not conducive to the improvement of the final forming quality.

SUMMARY OF THE INVENTION

The purpose of this utility model is to address the above situation, to provide an lost foam structure for the casting of large-volume special-shaped cast iron pipes.

The specific scheme of the utility model is: an lost foam structure for casting large-volume special-shaped cast iron pipes, which has a lost foam body, and a support structure is arranged inside the lost foam body, and the support structure includes an intermediate support column, The upper part of the middle support column is provided with a first support rod group, the lower part of the middle support column is provided with a second support rod group, and the lower end of the middle support column is also provided with a glass fiber rod group. The respective outer ends of the rod group and the glass fiber rod rod group are bonded and connected with the inner wall of the lost foam body.

Further, in the present invention, the first and second support rod groups are formed by a plurality of foam rods with the middle support column as the center in a spoke shape, and the outer ends of each foam rod are uniformly distributed. Adhesive connection with the inner wall of the lost foam body.

Further, the foam rod in the second support rod group of the present invention is provided with a trapezoidal notch at the middle position.

Further, in the present invention, the glass fiber rod group includes a cylindrical connecting body and several glass fiber rods. The cylindrical connecting body is made of foam material and is connected to the bottom of the middle support column. The connecting body is arranged in a spoke shape in the center, one end of the glass fiber rod is bonded to the cylindrical connecting body, and the other end of the glass fiber rod is bonded to the inner wall of the lost foam body.

Further, the middle support column in the present invention is made of foam material.

The utility model provides convenience for the casting and forming of various large-sized cast iron pipe workpieces by designing a new structure of the lost foam, and at the same time improves the forming quality of this type of cast iron pipe workpieces to a certain extent. The lost foam structure of the utility model is not easily deformed and damaged by setting the relevant internal structure, and has good practical use and promotion value.

Description of drawings

Fig. 1 is the front view direction structure schematic diagram of the present utility model;

Fig. 2 is the top view direction structural schematic diagram of the present utility model;

Fig. 3 is the main sectional direction structure schematic diagram of the present utility model;

FIG. 4 is a schematic diagram of the connection structure on the middle support column in the present invention.

In the figure: 1—lost foam body, 2—glass fiber rod, 3—first strut group, 4—intermediate support column, 5—trapezoidal notch, 6—second strut group, 7—cylindrical connector.

Detailed ways

The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the The orientation or positional relationship that the utility model product is usually placed in use is only for the convenience of describing the present utility model or simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed or operated in a specific orientation , so it cannot be construed as a limitation of the present invention.

In the description of the present invention, it should also be noted that, unless otherwise expressly specified and restricted, the terms "arrangement", "installation" and "connection" should be understood in a broad sense, for example, it may be a fixed connection or a A detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, and it can be the internal communication between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations.

Referring to FIGS. 1 to 4 , the present utility model is an lost foam structure for casting large-volume special-shaped cast iron pipes, and has an lost foam body 1 . The lost foam body is provided with a support structure inside, and the support structure includes a The middle support column 4, the upper part of the middle support column is provided with a first support rod group 3, the lower part of the middle support column is provided with a second support rod group 6, and the lower end of the middle support column is also provided with a glass fiber rod group. The outer ends of the support rod group, the second support rod group and the glass fiber rod group are all bonded and connected with the inner wall of the lost foam body.

Further, in this embodiment, the first support rod group and the second support rod group are formed by a plurality of foam rods evenly distributed in a spoke shape with the middle support column as the center, and the outer end of each foam rod is Adhesive connection with the inner wall of the lost foam body.

Further, in this embodiment, the foam rod in the second support rod group is provided with a trapezoidal notch 5 at the middle position.

Further, in this embodiment, the glass fiber rod group includes a cylindrical connecting body 7 and several glass fiber rods 2. The cylindrical connecting body is made of foam material and is connected to the bottom of the middle support column. The cylindrical connecting body is arranged in a spoke shape, one end of the glass fiber rod is bonded to the cylindrical connecting body, and the other end of the glass fiber rod is bonded to the inner wall of the lost foam body.

Further, in this embodiment, the middle support column is made of foam material.

The utility model is essentially to make a lost foam of a novel structure, specifically:

First use foam material to make a lost foam body, then make the inner support structure, use foam material to make the middle support column inside, the middle support column can be made into cylindrical or square column shape, and then glue it on it The first pole group and the second pole group, the first pole group and the second pole group are also made of foam rods for support, and the first pole group and the second pole group are to support disappearance The upper part of the mold body has a smaller diameter, and the bottom of the middle support column is provided with a glass fiber rod group. The glass fiber rod group is used to support the larger diameter part of the lower part of the lost foam body. The glass fiber rod group is resistant to high temperature. After casting and use, it can be taken out and used again, and the foam rod above will dissolve and disappear with the lost foam casting.

The utility model improves the lost foam structure, so that the lost foam will not be easily deformed when the lost foam is embedded in the molding sand box before the casting operation, so that the deformation amount of the workpiece during the later casting and molding can be guaranteed, and the casting molding quality can be improved.

The utility model provides convenience for the casting and forming of various large-sized cast iron pipe workpieces by designing a new structure of the lost foam, and at the same time improves the forming quality of this type of cast iron pipe workpieces to a certain extent. The lost foam structure of the utility model is not easily deformed and damaged by setting the relevant internal structure, and has good practical use and promotion value.

Claims (5)

1. An lost foam structure for casting large-volume special-shaped cast iron pipes, having a lost foam body, characterized in that: a support structure is provided inside the lost foam body, and the support structure includes an intermediate support column, and the intermediate support The upper part of the column is provided with a first support rod group, the lower part of the middle support column is provided with a second support rod group, the lower end of the middle support column is also provided with a glass fiber rod group, the first support rod group, the second support rod group . The outer ends of the glass fiber rod groups are all bonded and connected with the inner wall of the lost foam body. 2. The lost foam structure for casting large-volume special-shaped cast iron pipes according to claim 1, characterized in that: the first support rod group and the second support rod group are made of several foam rods with a middle part. The supporting pillars are formed in a spoke shape evenly distributed in the center, and the outer end of each foam rod is bonded and connected with the inner wall of the lost foam body. 3 . The lost foam structure for casting large-volume special-shaped cast iron pipes according to claim 2 , wherein the foam rod in the second strut group is provided with a trapezoidal notch at the middle position. 4 . 4. The lost foam structure for casting large-volume special-shaped cast iron pipes according to claim 1, characterized in that: the glass fiber rod group comprises a cylindrical connector and several glass fiber rods, and the cylindrical The connecting body is made of foam material and is connected to the bottom of the middle support column. The glass fiber rods are arranged in a spoke shape with the cylindrical connecting body as the center. One end of the glass fiber rod is bonded to the cylindrical connecting body, and the other end of the glass fiber rod is bonded connected to the inner wall of the lost foam body. 5 . The lost foam structure for casting large-volume special-shaped cast iron pipes according to claim 1 , wherein the intermediate support column is made of foam material. 6 .

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