CN216028003U

CN216028003U - Aluminum die-casting die for automobile exhaust support

Info

Publication number: CN216028003U
Application number: CN202122462681.1U
Authority: CN
Inventors: 袁东义; 沈姚跃; 李文博
Original assignee: Ikd Co ltd
Current assignee: Ikd Co ltd
Priority date: 2021-10-13
Filing date: 2021-10-13
Publication date: 2022-03-15
Anticipated expiration: 2031-10-13

Abstract

The utility model discloses an aluminum die-casting die for an automobile exhaust support, which comprises a movable die assembly, a fixed die assembly and a secondary extrusion assembly, wherein the movable die assembly is fixed on the fixed die assembly; the movable die assembly and the fixed die assembly form a casting cavity and an extrusion slag ladle cavity which are communicated with each other; the casting cavity comprises a first area corresponding to the base part and a second area corresponding to the rod part; the side part of the extrusion slag ladle cavity at the transition of the first zone and the second zone; the extrusion part of the secondary extrusion assembly extends into the extrusion slag ladle cavity, secondary extrusion is carried out on aluminum in the extrusion slag ladle cavity, and pressure supplement is carried out on the part with thicker wall thickness, which is easy to generate a cooling shrinkage hole originally, so that the internal structure of the casting is more compact; and only a slag ladle which is trimmed and removed at the later stage is formed at the side part of the automobile exhaust support, so that the structure and the appearance of the main body of the automobile exhaust support are not influenced.

Description

Aluminum die-casting die for automobile exhaust support

Technical Field

The utility model relates to the technical field of aluminum die-casting molds, in particular to an aluminum die-casting mold for an automobile exhaust support.

Background

When the aluminum die casting is formed, a corresponding die is required, and the die generally comprises a fixed die and a movable die. During die casting, the fixed die and the movable die are assembled, and a forming cavity is formed by enclosing the fixed die and the movable die. And (3) utilizing a die casting machine to enable the high-temperature molten aluminum to enter the molding cavity through the pouring gate, and cooling through a cooling system to form the aluminum die casting. And then opening the die, and ejecting the aluminum die casting through an ejection mechanism.

As shown in the figure, the automobile exhaust support comprises a base part and a rod part, wherein the thickness of the base part is relatively thin, and the thickness of a transition part a of the base part and the rod part is relatively thick. In the process of die casting, when the aluminum liquid in the forming cavity is cooled, the part with thinner wall thickness is cooled faster than the part with thicker wall thickness, namely, for some parts with thicker thickness or abrupt change of the cross section size on the aluminum die casting, the cooling in the aluminum die casting is slower than that of other parts. That is, when the gate and other portions having a relatively small thickness have been substantially cooled, the inside of the portions having a relatively large thickness have not been cooled. Thus, the pressure applied from the gate to the inside of the molding cavity cannot be transmitted to the portion having a large thickness, and a shrinkage cavity is easily generated inside the transition portion a.

The automobile exhaust support belongs to a part needing bearing, the requirement on strength is high, and the existence of the shrinkage cavity can influence the strength and the quality of the automobile exhaust support, so that the automobile exhaust support is easy to break in the later use process.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a cutting device for an aluminum die-casting part material handle capable of automatically discharging.

The technical scheme adopted by the utility model for solving the technical problems is as follows: the aluminum die-casting die for the automobile exhaust bracket comprises a movable die assembly, a fixed die assembly and a secondary extrusion assembly;

the automotive exhaust mount includes a base portion and a stem portion;

the movable die assembly and the fixed die assembly form a casting cavity and an extrusion slag ladle cavity which are communicated with each other;

the casting cavity comprises a first area corresponding to the base part and a second area corresponding to the rod part;

the extrusion slag ladle cavity is positioned at the side part of the transition part of the first zone and the second zone;

the secondary extrusion assembly comprises an extrusion component which can penetrate into the extrusion slag ladle cavity;

the movable mold component and the fixed mold component are assembled, and the casting cavity and the extrusion slag ladle cavity are filled with aluminum liquid; the extrusion component extends into the extrusion slag ladle cavity and carries out secondary extrusion on the aluminum in the extrusion slag ladle cavity.

The further preferable scheme of the utility model is as follows: the movable mould component comprises a movable mould plate and a movable mould core arranged in the center of the movable mould plate, and the fixed mould component comprises a fixed mould plate, a fixed mould core arranged in the center of the fixed mould plate and a pouring part which penetrates through the inner side of the fixed mould core and is provided with a pouring gate.

The further preferable scheme of the utility model is as follows: the ejection assembly comprises a top plate driven by the driving device and a plurality of ejector rods connected to the top plate, an ejection gap is formed between the top plate and the movable mold plate, and the driving device drives the top plate to move so that the ejector rods extend into the casting cavity to eject the casting from the driven mold core.

The further preferable scheme of the utility model is as follows: the number of the casting cavities and the number of the extrusion slag ladle cavities are two, and the number of the secondary extrusion assemblies is the same as the number of the extrusion slag ladle cavities.

The further preferable scheme of the utility model is as follows: the first casting cavity and the second casting cavity are parallel, and the first extrusion slag ladle cavity and the second extrusion slag ladle cavity are on the same side.

The further preferable scheme of the utility model is as follows: the sprue gate forms two runners which are respectively communicated with the first casting cavity and the second casting cavity, and the runners are positioned on one side of the first area of the casting cavity, which is adjacent to the extrusion slag ladle cavity.

The further preferable scheme of the utility model is as follows: the secondary extrusion assembly further comprises an extrusion oil cylinder and a piston rod, the extrusion oil cylinder is connected with the extrusion piston rod, the extrusion piston rod is connected with the extrusion component, and the extrusion oil cylinder drives the extrusion piston rod to drive the extrusion component.

The further preferable scheme of the utility model is as follows: the radial width range of the extrusion slag ladle cavity is 1.5-3 cm.

The further preferable scheme of the utility model is as follows: the extrusion oil cylinder is arranged on the outer side of the top plate, a plurality of mounting blocks are arranged on the periphery of the movable template, the end faces of all the mounting blocks form mounting faces with the same height, and a concave area is arranged in the middle of each mounting block to accommodate the top plate and the extrusion oil cylinder.

The further preferable scheme of the utility model is as follows: the casting cavity also comprises a plurality of overflow slag ladle cavities at the periphery, and the ejector rod corresponds to the overflow slag ladle cavities.

Compared with the prior art, the utility model has the advantages that the secondary extrusion assembly extrudes the liquid die-casting material in the extrusion slag ladle cavity, so that the pressure is transmitted to the casting cavity part corresponding to the transition part of the base part and the rod part, the pressure supplement is carried out on the part with thicker wall thickness which is easy to generate cooling shrinkage holes originally, shrinkage pits and shrinkage holes caused by uneven cooling are avoided, and the internal structure of the casting is more compact.

And through indirect force transmission, only a slag ladle which is trimmed and removed at the later stage is formed at the side part of the automobile exhaust support, the structure and the appearance of the main body of the automobile exhaust support cannot be influenced, and in the subsequent processing process, the slag ladle can fall off only by slightly knocking the slag ladle and is trimmed by a file.

Drawings

The present invention will be described in further detail below with reference to the drawings and preferred embodiments, but those skilled in the art will appreciate that the drawings are only drawn for the purpose of illustrating the preferred embodiments and therefore should not be taken as limiting the scope of the utility model. Furthermore, unless specifically stated otherwise, the drawings are merely schematic representations based on conceptual representations of elements or structures depicted and may contain exaggerated displays and are not necessarily drawn to scale.

FIG. 1 is a schematic view of a vehicle exhaust support;

FIG. 2 is a schematic view of an aluminum die casting mold for an automotive exhaust support;

FIG. 3 is a partial schematic view (moving die side) of an aluminum die-casting mold for an automobile exhaust bracket;

FIG. 4 is a partial schematic view (stationary mold side) of an aluminum die-casting mold for an automobile exhaust bracket;

FIG. 5 is a schematic view showing the inner fit of an aluminum die casting mold for an automobile exhaust bracket.

Detailed Description

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Those skilled in the art will appreciate that the description is illustrative only, and is not to be construed as limiting the scope of the utility model.

It should be noted that: like reference numerals refer to like items in the following figures, and thus, once an item is defined in one figure, it may not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", and the like refer to the orientation or positional relationship shown in the drawings, or the orientation or positional relationship which the utility model product is conventionally placed in use, and are only for convenience of describing the present invention and simplifying the description, but do not refer to or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.

As shown in fig. 1, an automobile exhaust bracket 100 is an aluminum die casting, and includes a base portion 101 and a rod portion 102, wherein the base portion 101 has a relatively thin thickness, and a transition portion a between the base portion 101 and the rod portion 102 has a relatively thick thickness. In order to avoid the occurrence of shrinkage holes at the transition part a, improve the internal quality of the casting and reduce casting defects, the embodiment provides the aluminum die-casting die 200 suitable for the automobile exhaust support 100.

As shown in fig. 2-5, the aluminum die casting mold 200 includes a movable mold assembly 201, a stationary mold assembly 202, and a secondary extrusion assembly 203. The inner surfaces of the movable mold assembly 201 and the fixed mold assembly 202 are both provided with parting surfaces, and when the movable mold assembly 201 and the fixed mold assembly 202 are closed, a casting cavity K and an extrusion slag ladle cavity T which are communicated with each other are formed in an enclosing mode. Wherein the casting cavity K includes a first region K1 corresponding to the base 101 and a second region K2 corresponding to the stem 102. The extrusion slag ladle chamber T is positioned at the side of the transition of the first zone K1 and the second zone K2. The secondary extrusion assembly 203 comprises an extrusion part 10 which can penetrate into the extrusion slag ladle chamber T to carry out secondary extrusion on the aluminum of the extrusion slag ladle chamber T.

In actual operation, the movable mold assembly 201 and the fixed mold assembly 202 are firstly assembled, and the die casting machine enables high-temperature molten aluminum to enter the casting cavity K and further enter the extrusion slag ladle cavity T. And then the secondary extrusion assembly 203 is started to enable the extrusion component 10 to extend into the extrusion slag ladle chamber T, so as to extrude the liquid die-casting material in the extrusion slag ladle chamber T. Liquid aluminum in the extrusion slag ladle cavity T is pressed through the extrusion component 10, so that pressure is conducted to the transition position of the first area K1 and the second area K2, the thick wall thickness part which is easy to generate cooling shrinkage holes originally is subjected to pressure supplement, shrinkage pits and shrinkage holes are prevented from being generated due to uneven cooling, and the internal structure of the casting is more compact.

After the liquid aluminum is further cooled and solidified, the extrusion part 10 linearly moves and exits the extrusion slag ladle cavity T. And (4) after the process is finished, opening the die of the movable die assembly 201 and the fixed die assembly 202, and demolding the aluminum die casting to obtain the aluminum die casting with the slag ladle s. Preferably, the radial width range of the extrusion slag ladle cavity T is 1.5-3cm, the size of the formed slag ladle s is small, the connection strength with the automobile exhaust support 100 is small, and the slag ladle s can be removed only by simply trimming in the subsequent processing process.

It should be noted that in the present embodiment, the extrusion slag ladle chamber T is provided at the side of the casting cavity K, and acts on the transition between the first zone K1 and the second zone K2 through pressure conduction. This is because if the extrusion part 10 directly extrudes the transition between the first zone K1 and the second zone K2, the final molding shape of the molten aluminum in the cavity is damaged by the extrusion part 10 extending into the cavity, so that the molded automobile exhaust support 100 has surface defects, which adversely affects the appearance and strength and cannot meet the quality requirement. And through indirect force transmission, only a slag ladle s which is trimmed and removed at the later stage is formed at the side part of the automobile exhaust support 100, so that the influence on the main body of the automobile exhaust support 100 can be avoided, and the effect on removing the shrinkage cavity is still effective.

As shown in fig. 3 to 4, the movable mold assembly 201 includes a movable mold plate 11 and a movable mold core 12 provided at the center of the movable mold plate 11, and the fixed mold assembly 202 includes a fixed mold plate 21, a fixed mold core 22 provided at the center of the fixed mold plate 21, and a pouring member 23 having a pouring gate penetrating into the inner side of the fixed mold core 22. The movable mold core 12 and the fixed mold core 22 are provided with parting surfaces, and the two are enclosed to form a casting cavity K and an extrusion slag ladle cavity T. The pouring part is connected with a die casting machine, and high-temperature molten aluminum enters the casting cavity K and the extrusion slag ladle cavity T through a pouring port of the pouring part.

The mold core is separated from the mold plate because the mold core has high precision requirement and large size easily causes deformation. And mold core detachably sets up on the template, is favorable to the maintenance and the change in later stage to save the processing cost.

As shown in fig. 3-4, the number of the casting mold cavities K and the number of the extrusion slag ladle cavities T are both two, and the number of the secondary extrusion assemblies 203 is the same as the number of the extrusion slag ladle cavities T. The first casting cavity K and the second casting cavity K are parallel, and the first extrusion slag ladle cavity T and the second extrusion slag ladle cavity T are on the same side. The sprue gate forms two runners L which are respectively communicated with the first casting cavity K and the second casting cavity K, and the runners L are positioned on one side, adjacent to the extrusion slag ladle cavity T, of the first region K1 of the casting cavity K.

The gate is provided in the first region K1 because the first region K1 corresponds to a thin wall thickness and a wide width, and the liquid can rapidly flow through the first region K1 to the second region K2, thereby reducing the process cycle time. And the part with thinner wall thickness is easy to generate the problem of material shortage, and the part is arranged near the pouring gate, thereby being beneficial to the molding quality. The pouring gate L is arranged at one side of the first area K1 of the casting cavity K adjacent to the extrusion slag ladle cavity T, so that the mutual interference between the first area K1 and the extrusion slag ladle cavity T can be avoided, and the application of pressure is facilitated.

As shown in fig. 2 and 5, the aluminum die-casting mold 200 for the automobile exhaust support 100 further comprises an ejection assembly 204, the ejection assembly 204 comprises a top plate 41 driven by a driving device and a plurality of ejector rods 42 connected to the top plate 41, an ejection gap is formed between the top plate 41 and the movable mold plate 11, and the driving device drives the top plate 41 to move, so that the ejector rods 42 extend into the casting cavity K to eject the casting from the driven mold core 12. The driving device is preferably an oil cylinder or an air cylinder. The top plate 41 is positioned on the outer side of the movable mould plate 11, the ejector rod 42 penetrates through the movable mould plate 11 and the movable mould core 12, and the aluminum die casting positioned in the movable mould core 12 is ejected out to realize discharging.

The casting cavity K further comprises a plurality of overflow slag ladle cavities M on the periphery, and the ejector rod 42 penetrates through the movable mold core 12 and enters the parting surface of the movable mold core 12 corresponding to the overflow slag ladle cavities M to act on an overflow slag ladle f of the aluminum die casting positioned at the parting surface, so that the cooled and formed automobile exhaust bracket 100 aluminum die casting is ejected out of the mold by applying an outward acting force. The flash slag ladle f is subsequently processed and removed, so that the burrs of the ejector rod 42 formed on the main body of the automobile exhaust support 100 are avoided, and the surface quality of the automobile exhaust support 100 is improved.

As shown in fig. 5, the secondary extrusion assembly 203 further includes an extrusion cylinder 20 and an extrusion piston rod, the extrusion cylinder 20 is connected to the extrusion piston rod 30, the extrusion piston rod 30 is connected to the extrusion component 10, and the extrusion cylinder 20 drives the extrusion piston rod 30 to drive the extrusion component 10. The squeeze cylinder 20 is provided outside the top plate 41. The extrusion oil cylinders 20 in the embodiment comprise two extrusion oil cylinders 20, each extrusion oil cylinder 20 is provided with an extrusion piston rod 30, each extrusion piston rod 30 is provided with an extrusion component 10, and each extrusion component 10 corresponds to one extrusion cinder ladle cavity T. Of course, only one extrusion cylinder 20 and one extrusion piston rod 30 may be provided, and the front side of the extrusion piston rod 30 is divided into two paths to respectively provide one extrusion component 10, thereby realizing integral synchronous extrusion.

As shown in fig. 2, a plurality of mounting blocks 15 are arranged on the periphery of the movable die plate 11, and the end surfaces of all the mounting blocks 15 form mounting surfaces with the same height, so that the whole die can be mounted on a die casting machine through the mounting surfaces. And a depressed area N is provided in the middle of the mounting block 15 to receive the top plate 41 and the squeeze cylinder 20. When the squeeze cylinder 20 is fitted in place, the rear surface of the cylinder body does not exceed the mounting block 15, thereby avoiding the squeeze cylinder 20 from interfering with the mounting of the aluminum die-casting mold 200 to the die-casting machine. And, the depressed area N extends to 11 both sides of movable mould board, forms the opening, is convenient for set up parts such as cable, condenser tube, makes aluminium die casting die 200 more compact clean and tidy, and the overall arrangement is more reasonable.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "mounted" and "connected" are to be interpreted broadly, e.g., as either a fixed connection, a removable connection, or an integral connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The above detailed description of the apparatus for cutting off an aluminum die-cast part stem provided by the present invention is provided, and the principle and the embodiment of the present invention are explained herein by using specific examples, and the above description of the embodiments is only used to help understanding the present invention and the core idea. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.

Claims

1. The aluminum die-casting die for the automobile exhaust support comprises a base part and a rod part, and is characterized by comprising a movable die assembly, a fixed die assembly and a secondary extrusion assembly;

2. The aluminum die-casting mold for the exhaust support of the automobile as recited in claim 1, wherein the movable mold assembly includes a movable mold plate and a movable mold core provided at a center of the movable mold plate, and the fixed mold assembly includes a fixed mold plate, a fixed mold core provided at a center of the fixed mold plate, and a casting member having a casting opening penetrating an inner side of the fixed mold core.

3. The aluminum die-casting mold for the automobile exhaust support as recited in claim 2, further comprising an ejection assembly, wherein the ejection assembly comprises a top plate driven by the driving device and a plurality of ejector rods connected to the top plate, an ejection gap is formed between the top plate and the movable mold plate, and the driving device drives the top plate to move, so that the ejector rods extend into the casting cavity to eject the casting from the driven mold core.

4. The aluminum die-casting die for the automobile exhaust support as recited in claim 2, wherein the number of the casting cavities and the number of the extrusion cinder ladle cavities are both two, and the number of the secondary extrusion assemblies is the same as the number of the extrusion cinder ladle cavities.

5. The aluminum die-casting mold for the automobile exhaust support according to claim 4, wherein the first casting cavity and the second casting cavity are juxtaposed, and the first extrusion tundish cavity and the second extrusion tundish cavity are on the same side.

6. The aluminum die-casting die for the automobile exhaust support as claimed in claim 5, wherein the sprue gate forms two runners respectively communicated with the first casting cavity and the second casting cavity, and the runners are located on one side of the first region of the casting cavity, which is adjacent to the extrusion slag ladle cavity.

7. The aluminum die-casting die for the automobile exhaust support as recited in claim 3, wherein the secondary extrusion assembly further comprises an extrusion cylinder and an extrusion piston rod, the extrusion cylinder is connected with the extrusion piston rod, the extrusion piston rod is connected with the extrusion component, and the extrusion cylinder drives the extrusion piston rod to drive the extrusion component.

8. The aluminum die casting mold for the automobile exhaust support according to claim 1, wherein the radial width of the extrusion tundish cavity ranges from 1.5 cm to 3 cm.

9. The aluminum die-casting mold for the automobile exhaust support according to claim 7, wherein the extrusion cylinder is disposed outside the top plate, the movable die plate is provided at the periphery thereof with a plurality of mounting blocks, end surfaces of all the mounting blocks form mounting surfaces having the same height, and a recessed region is provided in the middle of the mounting blocks to accommodate the top plate and the extrusion cylinder.

10. The aluminum die-casting die for the automobile exhaust support as recited in claim 3, wherein the casting cavity further comprises a plurality of overflow slag covering cavities at the periphery, and the ejector rods correspond to the overflow slag covering cavities.