CN210172506U - Mould exhaust structure on casting mould is used in aluminum alloy wheel hub production - Google Patents

Abstract

The utility model provides an upper die exhaust structure of a casting die for producing aluminum alloy wheel hubs, which comprises an upper die, a side die and a lower die are arranged below the upper die, the upper die and the side die, the lower die forms a workpiece cavity, the bottom of the upper die is provided with a plurality of exhaust holes, exhaust plugs are arranged in the exhaust holes, the top of the upper die is provided with an annular exhaust disc, exhaust nozzles made of ceramics are arranged on the exhaust disc, the position, corresponding to the exhaust nozzles, of the upper die is provided with an annular exhaust cavity, the bottom of the exhaust cavity is provided with an air guide disc, a plurality of air guide holes and offset holes are formed in the air guide disc, the exhaust plugs are arranged at the butt joint positions of the air guide holes and the exhaust cavity, the side faces of the air guide holes are conical faces, an air guide groove is formed in the bottom face of the air guide disc, a connecting table used for connecting a demolding mechanism is arranged at the top of the upper die, and the connecting table is located on the. The utility model relates to a rationally, simple structure, exhaust effect is good, is fit for extensive the popularization.

Description

Mould exhaust structure on casting mould is used in aluminum alloy wheel hub production

Technical Field

The utility model belongs to the technical field of the wheel hub mould, especially, relate to an aluminum alloy wheel hub production is with mould exhaust structure on casting mould.

Background

The hub is an important component of an automobile, mainly plays a role in bearing and the rotation and the advancing of wheels, bears axial load and radial load, and the performance of the hub has great influence on the overall performance of the automobile. The magnesium-aluminum alloy wheel hub has the advantages of light weight, small inertia resistance, high manufacturing precision, good heat dissipation performance and the like, and is beneficial to improving the straight-line driving performance of an automobile and reducing the rolling resistance of a tire. The hub is prepared by casting or forging. Among them, the casting method is suitable for mass production, but in the hub casting process, gas is hardly discharged due to the high viscosity of the molten metal for casting the hub, and a large amount of gas is accumulated in the casting to form pores. Therefore, when the molten aluminum is injected into the cavity of the mold, a reasonable exhaust method is adopted to exhaust the gas in the cavity, so that the number of bubbles in the molten metal is reduced to the minimum, otherwise, functional defects are generated, and the qualification rate of products is reduced.

The die used in the die casting method comprises an upper die, a lower die and a side die positioned between the upper die and the lower die. Wherein, go up the mould and all be provided with the core vent of a certain amount usually, all peg graft in the exhaust hole on the mould directly basically, and a lot of exhaust holes and core vent set up in the bottom or the side of last mould moreover, not only are blockked up easily, and exhaust efficiency is low, influences the product percent of pass, and life is than short moreover.

SUMMERY OF THE UTILITY MODEL

The utility model discloses to the technical problem that above-mentioned wheel hub mould exists in the aspect of the exhaust, provide a reasonable in design, simple structure, the mould exhaust structure on aluminum alloy wheel hub production casting mould that exhaust efficiency is high and long service life.

In order to achieve the above object, the technical solution adopted by the present invention is that, the present invention provides an upper mold exhaust structure of a casting mold for producing aluminum alloy wheel hubs, which comprises an upper mold, a side mold and a lower mold are arranged below the upper mold, the side mold and the lower mold form a workpiece cavity, a plurality of exhaust holes are arranged at the bottom of the upper mold, an exhaust plug is arranged in each exhaust hole, an annular exhaust disc is arranged at the top of the upper mold, a plurality of exhaust nozzles distributed in a circular array are arranged on the exhaust disc, the exhaust nozzles are made of ceramic material, an annular exhaust cavity is arranged at the position of the upper mold corresponding to the exhaust nozzles, an air guide disc communicated with the workpiece cavity is arranged at the bottom of the exhaust cavity, a plurality of air guide holes distributed in a circular array are arranged on the air guide disc, and an exhaust plug is arranged at the butt joint of the air guide, the side of air guide hole is the conical surface, the bottom surface of air guide dish is provided with the annular air guide groove with every air guide hole intercommunication, and one side that every air guide hole is partial to the side mould is provided with an offset hole, offset hole and air guide hole intercommunication, the top of going up the mould is provided with the connection platform that is used for connecting demoulding mechanism, connect the inboard that the platform is located the exhaust dish and turn over a book to the outside of exhaust dish and extend.

Preferably, the workpiece cavity comprises an upper edge and a lower edge, a plurality of side exhaust holes are obliquely formed in the positions, close to the lower edge, of the side molds, exhaust plugs are arranged in the side exhaust holes, and the side exhaust holes are communicated with the offset holes through air guide columns vertically arranged in the side molds.

Preferably, the vent plug is made of cemented carbide.

Compared with the prior art, the utility model discloses an advantage lies in with positive effect:

the utility model provides a pair of mould exhaust structure on aluminum alloy wheel hub production is with mould, the gas in the work piece die cavity except through exhaust hole discharge partly, another part is gaseous through multiple channel flow direction air guide groove, air guide disc, air guide hole and exhaust disc, and the gas outgoing form is reasonable, and work piece yield and production efficiency are higher. The utility model relates to a rationally, simple structure, life is longer, is fit for extensive the popularization.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.

FIG. 1 is a top view of an exhaust tray provided in an embodiment;

FIG. 2 is a sectional view of an upper mold venting structure of a mold for producing an aluminum alloy hub according to an embodiment;

in the above figures, 1, the upper die; 2. side mould; 3. a lower die; 4. a workpiece cavity; 41. an upper edge; 42. a lower edge; 5. an exhaust hole; 6. an exhaust tray; 7. an exhaust nozzle; 8. an exhaust chamber; 9. an air guide plate; 10. An air vent; 11. a gas guide groove; 12. offsetting the hole; 13. a connecting table; 14. a gas-conducting column; 15. and a side exhaust hole.

Detailed Description

In order to make the above objects, features and advantages of the present invention more clearly understood, the present invention will be further described with reference to the accompanying drawings and examples. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict. For convenience of description, the words "upper", "lower", "left" and "right" used herein refer to the same directions as the drawings, and do not limit the structure.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the present invention is not limited to the limitations of the specific embodiments of the present disclosure.

Embodiment, as shown in fig. 1 and 2, the utility model provides a pair of mould exhaust structure on aluminum alloy wheel hub production is with mould on casting mould, including last mould 1, the below of going up mould 1 is provided with side form 2 and lower mould 3, goes up mould 1 and side form 2, lower mould 3 and constitutes work piece die cavity 4, and the bottom of going up mould 1 is provided with a plurality of exhaust holes 5, is provided with the core vent in the exhaust hole 5. On this basis, the utility model discloses make the improvement to the exhaust structure who goes up the mould top to provide multiple exhaust channel according to the casting characteristics.

Specifically, the utility model discloses top at last mould 1 is provided with annular exhaust dish 6, be provided with a plurality of exhaust nozzle 7 that is circular array distribution on the exhaust dish 6, exhaust nozzle 7 is made by ceramic material, the position of going up mould 1 and corresponding the exhaust nozzle is provided with annular exhaust chamber 8, the bottom of exhaust chamber 8 is provided with the air guide plate 9 with work piece die cavity 4 intercommunication, be provided with a plurality of air guide hole 10 that is circular array distribution on the air guide plate 9, air guide hole 10 is provided with the core vent with the butt joint department of exhaust chamber 8, the side of air guide hole 10 is the conical surface, the bottom surface of air guide plate 9 is provided with annular air guide groove 11 with every air guide hole intercommunication, one side of every air guide hole 10 deviation side form is provided with an offset hole 12, offset hole 12 and air guide hole 10 intercommunication. Wherein, except that the gas in the work piece die cavity 4 discharges a part through exhaust hole 5, another part of gas flows to air guide groove 11 from the work piece die cavity at the in-process that the molten metal is constantly poured into, and the gas in air guide groove 11 passes through air guide plate 9, air guide hole 10 and gets into exhaust chamber 8, and the gas in the exhaust chamber 8 is discharged through exhaust plate 9, and not only gas is derived efficiently, and the life of each part is longer moreover, easy dismounting.

In order to further improve the exhaust effect, the utility model discloses according to the mould characteristics make the improvement to the gas output form of work piece die cavity lower part on the mould. Specifically, the utility model provides a work piece die cavity 4 is including last edge 41 and lower edge 42, and the position slope that side form 2 is close to lower edge 42 is provided with a plurality of side exhaust hole 15, is provided with the core vent in the side exhaust hole 15, and side exhaust hole 15 is through perpendicular air guide post 14 and the off-set hole intercommunication that sets up in the side form, and the gas outgoing form is reasonable, and work piece yield and production efficiency are higher. When the molten metal in the workpiece cavity flows to the lower edge, the gas is forced to the side exhaust holes 15, and the gas in the side exhaust holes 15 flows to the gas guide disc through the guide columns 14, so that the exhaust process is completed. Like this, accomplish the exhaust through multiple exhaust channel, accord with the flow characteristics of casting solution in-process gas moreover, exhaust effect is better, and then is favorable to improving finished product quality and production efficiency.

For the convenience of being last mould and demoulding mechanism are connected, the utility model discloses top going up mould 1 is provided with the connection platform 13 that is used for connecting demoulding mechanism, connects the inboard that the platform is located the exhaust dish and turns over a book to the outside of exhaust dish and extend, reasonable in design to it has great utilization space to enable the mould center.

In order to reduce the change frequency and the result of use of core vent, the utility model provides a core vent adopts carbide to make, and carbide's core vent melting point is greater than the melting point of aluminum alloy, and life is longer to have good mating properties.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in other forms, and any person skilled in the art may use the above-mentioned technical contents to change or modify the equivalent embodiment into equivalent changes and apply to other fields, but any simple modification, equivalent change and modification made to the above embodiments according to the technical matters of the present invention will still fall within the protection scope of the technical solution of the present invention.

Claims (3)

1. An upper die exhaust structure of a casting die for producing aluminum alloy hubs comprises an upper die, wherein a side die and a lower die are arranged below the upper die, the side die and the lower die form a workpiece cavity, a plurality of exhaust holes are formed in the bottom of the upper die, and exhaust plugs are arranged in the exhaust holes, the upper die is characterized in that an annular exhaust disc is arranged at the top of the upper die, a plurality of exhaust nozzles distributed in a circular array are arranged on the exhaust disc and made of ceramic materials, an annular exhaust cavity is arranged at the position, corresponding to the exhaust nozzles, of the upper die, an air guide disc communicated with the workpiece cavity is arranged at the bottom of the exhaust cavity, a plurality of air guide holes distributed in a circular array are arranged on the air guide disc, the exhaust plugs are arranged at the joint of the air guide holes and the exhaust cavity, the side surface of each air guide hole is a conical surface, and an annular air guide groove communicated with each air guide hole is arranged on the bottom, one side of every air guide hole deviation side form is provided with an offset hole, offset hole and air guide hole intercommunication, the top of going up the mould is provided with the connection platform that is used for connecting demoulding mechanism, the connection platform is located the inboard of exhaust dish and turns over to the outside of exhaust dish and extend.

2. The upper die exhaust structure of the casting die for producing the aluminum alloy hub is characterized in that the workpiece cavity comprises an upper edge and a lower edge, a plurality of side exhaust holes are obliquely arranged at the position, close to the lower edge, of the side die, exhaust plugs are arranged in the side exhaust holes, and the side exhaust holes are communicated with the offset holes through air guide columns vertically arranged in the side die.

3. The mold-in-mold venting structure for aluminum alloy hub production as recited in claim 2, wherein the vent plug is made of cemented carbide.

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