CN108031800B

CN108031800B - Independent pouring system tool for large-scale steel castings

Info

Publication number: CN108031800B
Application number: CN201710895629.0A
Authority: CN
Inventors: 杨磊
Original assignee: Kocel Steel Foundry Co Ltd
Current assignee: Kocel Steel Foundry Co Ltd
Priority date: 2017-09-28
Filing date: 2017-09-28
Publication date: 2023-06-20
Anticipated expiration: 2037-09-28
Also published as: CN108031800A

Abstract

The invention relates to an independent pouring system tool for large-scale steel castings, which belongs to the technical field of casting processes and comprises a main sand box for forming castings. According to the independent pouring system tool, the sprue is independently arranged in the pouring system sand box, so that the size of the main sand box can be reduced, the using amount of molding sand is reduced, the difficulty of lifting and turning the sand box is reduced, and the independent pouring system tool is particularly suitable for casting large or ultra-large steel castings.

Description

Independent pouring system tool for large-scale steel castings

Technical Field

The invention relates to the technical field of casting processes, in particular to an independent pouring system tool for large-scale steel castings, which is suitable for the pouring system arrangement of large-scale or ultra-large-scale steel castings.

Background

In the molding process of large steel castings in the prior art, the sprue is paved in the sand box generally. In order to prevent the fire running accident in the pouring process, the minimum sand eating amount of the casting needs to be considered in the sand box design, and meanwhile, due to different product structures, certain products can increase the size of the sand box in order to ensure that the sand eating amount of the sprue meets the requirement. As shown in fig. 1, taking a certain high-medium pressure outer cylinder casting as an example, the casting is cast in two packages, in order to ensure the space between the straight pouring channels and the sand feeding requirement, the size of a sand box is designed to be 800 mm x 600 mm, and in the casting system of the casting, the following problems exist in increasing the size of the sand box:

1) The difficulty of the modeling process and the box turning is increased, and the risk of cracking of castings is increased;

2) The molding sand dosage and the liquid material dosage are increased, and the cost is greatly increased.

Disclosure of Invention

The invention provides an independent pouring system tool for a large-scale steel casting, aiming at the problems of large size of a sand box and large sand consumption caused by a pouring system setting mode of the large-scale steel casting in the prior art, so as to overcome the problems.

The invention aims to realize that an independent pouring system tool for large-scale steel castings comprises a main sand box for molding castings, and is characterized in that the main sand box is externally provided with an independent pouring system sand box, a sprue is arranged in the pouring system sand box, and a cross runner in the main sand box is led out of the box from the inside and extends into the pouring system sand box to be connected with the sprue. According to the independent pouring system tool, the sprue is independently arranged in the pouring system sand box, so that the size of the main sand box can be reduced, the using amount of molding sand is reduced, the difficulty of lifting and turning the sand box is reduced, and the independent pouring system tool is particularly suitable for casting large or ultra-large steel castings.

In order to facilitate the extraction of the cross runner, the cross runner is led out of the outer side of the sand box from the lateral direction of the main sand box which corresponds vertically, a sand box standard block is connected at the box plate of the cross runner which is led out of the main sand box in a matched mode, and square holes which are convenient for the extraction of the cross runner are formed in the vertical direction of the sand box standard block and the cross runner.

In order to facilitate the installation and connection of the standard sand box blocks and the sand boxes, the matched and connected parts of the standard sand box blocks and the box plates of the main sand boxes are provided with convex-concave jogged butt joint structures and are fixedly connected through bolts.

In order to facilitate the introduction of the cross runner into the pouring system sand box, the pouring system sand box comprises a plurality of layers of frame-shaped box plates, and square through holes are correspondingly formed in the walls of the frame-shaped box plates corresponding to the extraction direction of the cross runner of the main sand box.

In order to reduce sand consumption in the pouring system sand box, each layer of frame-shaped box plate of the pouring system sand box is internally provided with a baffle plate in the direction parallel to the sprue, the positions of all layers of baffle plates are in one-to-one correspondence, and the pouring system sand box is divided into a sand filling space around the sprue and a non-sand filling space far away from the sprue.

In order to meet the requirements of the casting process, one or more than one sprue is arranged in the casting system sand box.

In order to further adapt to the casting process requirements, the number of casting system box sand outside the main sand box is one or more.

Drawings

Fig. 1 is a schematic diagram of a prior art high and medium pressure outer cylinder steel casting.

FIG. 2 is a schematic illustration of a high pressure outer cylinder casting modeled using the independent gating system tooling of the large scale casting of the present invention.

FIG. 3 is a schematic illustration of the process of modeling a high-pressure outer cylinder steel casting by using the independent pouring system tooling for a large-scale steel casting of the invention.

FIG. 4 is a schematic view of a casting system flask.

FIG. 5 is a schematic view of a standard block of sand boxes.

FIG. 6 is a schematic view of a frame plate of the casting system flask.

1, casting a die; 2, a main sand box; 2A bottom box board; 3, a sprue; 4, pouring a system sand box; 5, a horizontal pouring channel; 6 frame type box boards; 6A square through holes; 7, sand box standard blocks; 8 partition boards.

Detailed Description

As shown in fig. 2-6, the independent pouring system tool for the large-scale steel casting comprises a main sand box 2 for molding the steel casting, wherein during molding, a casting mold 1 is arranged in the main sand box 2, an inner pouring gate and a transverse pouring gate 5 are arranged in the main sand box according to a normal pouring system arrangement mode, an independent pouring system sand box 4 is arranged outside the main sand box 2, a straight pouring gate 3 is arranged in the pouring system sand box 4, and the transverse pouring gate 5 in the main sand box 2 is led out of the box and extends into the pouring system sand box 4 to be connected with the straight pouring gate 3. According to the invention, the pouring system sand box embedded with the sprue is independently arranged outside the main sand box for molding the steel casting, so that the main sand box and the pouring system sand box can be independently molded, and only the cross runner in the main sand box is led out of the box when the main sand box is molded. And after the main sand box is closed, connecting the leading-out part of the cross runner with the sprue in the pouring system sand box, and completing the molding of the pouring system sand box. Therefore, the size of the main sand box can be reduced, the weight of the main sand box is reduced, the box turning difficulty is reduced, and the modeling efficiency is improved.

In order to facilitate the extraction of the cross runner 5 from the main sand box 2, the cross runner 5 is extracted from the lateral direction of the corresponding main sand box 2 from the outer side of the sand box, and is generally extracted from the lateral direction of the bottom box plate 2A, as shown in FIG. 4, the bottom box plate 2A of the cross runner extracted from the main sand box 2 is connected with a sand box standard block 7 in a matched manner, and square holes which are convenient for the extraction of the cross runner 5 are arranged in the direction perpendicular to the cross runner 5 of the sand box standard block 7.

In order to facilitate the introduction of the cross gate 5 into the pouring system sand box 4, the pouring system sand box 4 comprises a plurality of layers of frame-shaped box plates 6, and square through holes 6A are correspondingly formed in the plate walls of the frame-shaped box plates 6 corresponding to the extraction direction of the cross gate 5 of the main sand box 2. In order to reduce sand consumption in the pouring system sand box, a baffle plate 8 is arranged in each layer of frame-shaped box plate 6 of the pouring system sand box 4 in the direction parallel to the sprue, the positions of the baffle plates 8 are in one-to-one correspondence, and the pouring system sand box 4 is divided into a sand filling space around the sprue and a non-sand filling space far away from the sprue. According to the sand box of the pouring system, the space near the sprue is divided into the sand filling space and the non-sand filling space through the partition plate, so that the sand filling amount in the sand box of the pouring system can be reduced. According to the quantity of the sprue in the casting system sand box, a plurality of baffle plates can be arranged to be divided into sand filling spaces around the sprue and other non-sand filling spaces.

In order to facilitate the installation connection of the sand box standard block 7 and the main sand box, namely the installation connection of the sand box standard block 7 and the bottom box plate 2A of the leading-out runner 8, the matching connection part of the sand box standard block 7 and the bottom box plate 2A is provided with a convex-concave jogged butt joint structure and is fixedly connected through bolts, as shown in fig. 4 and 5.

In order to meet the requirements of the casting process, one or more sprue channels are arranged in the casting system sand box 4. In addition, in order to adapt to the requirements of the quantity of ladles and the setting positions of the sprue in the same product, one or more than one casting system sand boxes are arranged outside the main sand box 2.

According to the independent pouring system tool, the sprue is independently arranged in the pouring system sand box, so that the size of the main sand box can be reduced, the using amount of molding sand is reduced, the difficulty of lifting and turning the sand box is reduced, and the independent pouring system tool is particularly suitable for casting large or ultra-large steel castings.

Claims

1. The independent pouring system tooling for the large-scale steel castings comprises a main sand box for forming castings, wherein an independent pouring system sand box is arranged outside the main sand box, a sprue is arranged in the pouring system sand box, and a runner in the main sand box is led out of the outside of the box from the inside and extends into the pouring system sand box to be connected with the sprue; the matched and connected part of the standard sand box block and the box plate of the main sand box is provided with a convex-concave jogged butt joint structure and is fixedly connected through bolts; the pouring system sand box comprises a plurality of layers of frame-shaped box plates, and square through holes are correspondingly formed in the walls of the frame-shaped box plates corresponding to the leading-out direction of the transverse pouring channels of the main sand box; the baffle plates are arranged in each layer of frame-shaped box plate of the pouring system sand box in the direction parallel to the sprue, the positions of the baffle plates in each layer are in one-to-one correspondence, and the pouring system sand box is divided into sand filling spaces around the sprue and non-sand filling spaces far away from the sprue.

2. The independent pouring system tooling for large-scale steel castings according to claim 1, wherein more than one sprue is arranged in the pouring system sand box.

3. The independent pouring system tooling for large-scale steel castings according to claim 1, wherein the number of the pouring system box sand outside the main sand box is more than one.