CN216263347U

CN216263347U - Casting structure and casting system

Info

Publication number: CN216263347U
Application number: CN202121738119.0U
Authority: CN
Inventors: 李强; 梁继亚; 李朝东; 殷玲
Original assignee: Shared Intelligent Foundry Industry Innovation Center Weifang Co ltd
Current assignee: Shared Intelligent Foundry Industry Innovation Center Weifang Co ltd
Priority date: 2021-07-29
Filing date: 2021-07-29
Publication date: 2022-04-12
Anticipated expiration: 2031-07-29

Abstract

The utility model belongs to the technical field of casting, and mainly relates to a casting cap structure and a casting system comprising the same, wherein the casting cap structure comprises a first pouring gate section and a second pouring gate section, wherein the first pouring gate section of the casting cap structure is used as a pouring gate and also used as a feeding head of a casting, so that the arrangement of the feeding head is reduced; meanwhile, the arrangement quantity of pouring gates is reduced, the design of a pouring system is simplified, the technological yield of castings is obviously improved, the time consumption for cleaning the castings is shortened, and the production cost of the castings is reduced; meanwhile, the risk of riser root shrinkage is reduced, and the qualified rate of castings is improved.

Description

Casting structure and casting system

Technical Field

The utility model belongs to the technical field of casting, and mainly relates to a casting cap structure and a pouring system comprising the same.

Background

The main function of the gating system is to introduce molten metal into a cavity to form a casting, and the design of the existing gating system generally comprises: the process yield of the casting is about 70 percent generally, the cost of producing the casting is more wasted, the time consumption of the casting cleaning process is more, in addition, particularly for nodular iron castings, the defects of riser root shrinkage, riser meat knocking and the like are often easy to occur, and the rejection rate is higher. With the continuous development of casting technology, the production requirement is simplified, and the simple and reasonable gating system design is very critical to the batch production of casting products and the improvement of the yield.

Disclosure of Invention

It is necessary to provide a pouring system for solving the above problems, which integrates a pouring gate and a riser, significantly simplifies the pouring system, improves the casting process yield, reduces the casting rejection rate, reduces the cost waste, and improves the efficiency.

A casting structure comprises a first pouring gate section and a second pouring gate section; the upper end of the first pouring channel section is connected with a pouring basin; the lower end of the first pouring channel section is connected with the upper end of the second pouring channel section; the lower end of the second pouring channel section is connected with a cavity of a casting; the cross section of the first runner section is circular; the longitudinal section of the second pouring channel section is a variable section. Greatly shortens the molten metal flow, simplifies the pouring system and improves the process yield.

Preferably, the cross-sectional area of the second runner section decreases progressively from the upper end to the lower end, so as to provide a feeding gradient to the casting, avoiding shrinkage porosity at the root of the runner.

Preferably, the first runner section is of cylindrical configuration.

Preferably, the first runner section has a diameter of 100mm to 120 mm.

Preferably, the height of the first runner section is from 80mm to 100 mm.

Preferably, the first runner section has a volume of 8000mm³To 12000mm³Thus, the sufficient feeding liquid amount can be fully ensured to be provided for the casting.

Preferably, the second pouring channel section is of a conical structure, so that a temperature gradient is formed, the casting feeding is facilitated, and the root part is prevented from being shrunk and loosened.

Preferably, the cross-sectional area at the junction of the second runner section and the first runner section is from one third to one half of the cross-sectional area of the first runner section. The joint part plays a certain role in buffering and stopping slag for the molten metal, properly improves the flow rate of the molten metal and quickly fills the pouring system.

Preferably, the cross-sectional area of the junction of the second runner section and the cavity of the casting is one tenth of the cross-sectional area of the first runner section, in order to control the flow rate of the sprue in the casting to be about 1 m/s.

Preferably, the cross-sectional area at the junction of the second runner section and the cavity of the casting is one tenth of the cross-sectional area of the first runner section.

Preferably, the height of the second pouring channel section is 40mm to 50mm, the height of the second pouring channel section is moderate, feeding and cutting are easy, and the cleaning efficiency of the casting is improved.

A gating system comprising a gating structure as described in any of the above.

Preferably, the runner system is a closed runner system. The pouring system can be filled quickly, the slagging is less, and the qualified rate of the casting quality is improved.

By adopting the pouring system provided by the utility model, the first pouring gate section of the casting cap structure is used as a pouring gate and also used as a feeding head of a casting, so that the arrangement of the feeding head is reduced; meanwhile, the arrangement quantity of pouring gates is reduced, the design of a pouring system is simplified, the technological yield of castings is obviously improved, the time consumption for cleaning the castings is shortened, and the production cost of the castings is reduced; meanwhile, the risk of riser root shrinkage is reduced, and the production success rate of the casting is improved.

Drawings

FIG. 1 is a schematic structural diagram of a casting cap in the embodiment;

10-casting; 20-casting a cap structure; 21-a first runner section; 22-second runner section.

Detailed Description

To facilitate an understanding of the utility model, the utility model will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

The pouring cap structure and the pouring system provided by the utility model are suitable for castings with weight less than 100kg, the embodiment takes a small volute casing casting as an example, the casting has the mass of about 70kg, and the pouring cap system has the weight of about 7 kg.

Referring to fig. 1, the riser structure 20 includes a first runner section 21, a second runner section 22; the upper end of the first runner section 21 is connected with a pouring basin; the lower end of the first pouring channel section 21 is connected with the upper end of the second pouring channel section 22; the lower end of the second runner section 22 is connected with the cavity of the casting 10; the cross section of the first pouring channel section 21 is circular, and the structure is a cylindrical structure; the longitudinal section of the second runner section 22 is of a variable cross-section and the second runner section 22 is of a tapered configuration with a cross-sectional area that decreases progressively from the upper end to the lower end.

Specifically, in order to better satisfy the pouring quality of the volute casing casting, the following conditions need to be satisfied:

the first runner section 21 preferably has a diameter in the range 100mm to 120mm, a height in the range 80mm to 100mm, or a volume of 8000mm³～12000mm³The range is only needed, so that the casting can be effectively fed;

the height of the second pouring channel section 22 is preferably 40 mm-50 mm, and the cross sectional area of the connection part of the second pouring channel section 22 and the first pouring channel section 21 is 1/3-2/3 of the cross sectional area of the second pouring channel section 22; the cross sectional area of the connecting part of the second pouring channel section 22 and the cavity of the casting 10 is 1/10 of the cross sectional area of the first pouring channel section 21, and the flow velocity of the inner pouring gate is 0.5-1 m/s.

The pouring system comprises the pouring cap structure, and the pouring system adopts a closed pouring system, so that a casting cavity can be quickly filled, the flow rate of an inner pouring gate is quick and stable, less metal liquid enters the casting cavity for slagging, no splashing exists, and the risk of air entrainment and sand washing is reduced; meanwhile, the ratio of the riser modulus to the riser neck modulus is far larger than 1.2, the design completely meets the riser requirement, and the riser root shrinkage risk is greatly reduced.

The casting system is adopted to cast the volute casing casting, the process yield is improved to be close to 91%, the subsequent cleaning process time of the casting is obviously shortened, the production cost of the casting is reduced, and the quality and the qualification rate of the casting are improved.

The above-mentioned embodiments only express the specific embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the utility model. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A casting structure is characterized by comprising a first pouring gate section and a second pouring gate section;

the upper end of the first pouring channel section is connected with a pouring basin;

the lower end of the first pouring channel section is connected with the upper end of the second pouring channel section;

the lower end of the second pouring channel section is connected with a cavity of the casting.

2. The riser structure of claim 1, wherein the cross-sectional area of the second runner section decreases from an upper end to a lower end.

3. The riser structure of claim 1, wherein the first runner section is circular in cross-section.

4. The riser structure of claim 3, wherein the first runner section has a diameter of 100mm to 120 mm.

5. The riser structure of claim 1, wherein the first runner section has a height of 80mm to 100 mm.

6. The riser structure of claim 1, wherein the longitudinal cross-section of the second runner section is a variable cross-section.

7. The riser structure of claim 1, wherein the cross-sectional area at the junction of the second runner section and the first runner section is between one third and one half of the cross-sectional area of the second runner section.

8. The riser structure of claim 1, wherein the cross-sectional area at the junction of the second runner section and the cavity of the casting is one tenth of the cross-sectional area of the first runner section.

9. A gating system, comprising a top hat structure according to any one of claims 1 to 8.

10. The gating system of claim 9, wherein the gating system is a closed gating system.