Aluminum alloy hub low-pressure casting mold with sand core

Abstract

The utility model relates to the technical field of aluminum alloy hub low-pressure casting, in particular to an aluminum alloy hub low-pressure casting mold with a sand core, which comprises a base, a mold closing mechanism is mounted on the base, an extrusion mechanism is arranged at the top end of the mold closing mechanism, a mounting mechanism is fixed on the base, the mounting mechanism comprises a bottom plate and a mold plate, and the mold plate is fixed on the bottom plate. A bottom plate is fixed to the top end of the base, a plurality of sets of formworks are annularly fixed to the bottom plate at equal intervals, a telescopic spring is installed in the bottom plate, an ejector rod is fixedly connected to the telescopic spring, a supporting seat is fixed to the bottom plate, an inserting hole is formed in the supporting seat, and a sand core is installed at the inserting hole in a clamped mode. By means of the sand core, an internal hollow space can be formed during hub die casting, material waste is reduced, the structural strength and durability of the hub can be improved conveniently, the formed hub moves upwards along with the extrusion mechanism, the ejector pin abuts against the bottom end of the hub under the counter-acting force of the telescopic spring, and then the hub can slide out of the die assembly mechanism.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of casting mould, specifically a kind of aluminum alloy hub low-pressure casting mould with sand core, belong to aluminum alloy hub low-pressure casting technical field. BACKGROUND

[0002] Low-pressure casting is a kind of high-end casting technology, which can produce high-quality metal castings. In the process of low-pressure casting, metal is melted into liquid state, and then enters the mold through pre-pressurization to form the required shape. This process needs to be pressurized to some extent to ensure the accuracy of the casting shape and obtain the required physical properties.

[0003] However, when aluminum alloy hub is low-pressure cast, if sand core is not used during casting, some casting defects such as porosity, shrinkage and porosity may occur, which can affect the structural strength and durability of the hub, thereby increasing the risk of cracking during use. SUMMARY

[0004] The utility model aims to solve the above-mentioned problems and provide an aluminum alloy hub low-pressure casting mould with sand core. The hollow space inside the hub during pressure casting can be realized by the sand core, reducing material waste. The formed hub moves up with the extrusion mechanism, and the dowel pin touches the bottom end of the hub under the reaction force of the extension spring, which can make it slide out of the mold closing mechanism.

[0005] The utility model realizes the above-mentioned purposes through the following technical solutions. An aluminum alloy hub low-pressure casting mould with sand core includes a base, a mold closing mechanism installed on the base, an extrusion mechanism at the top of the mold closing mechanism, a mounting mechanism fixed on the base, the mounting mechanism including a bottom plate and a template, the top of the base is fixedly connected with the bottom plate, a plurality of groups of templates are fixedly installed on the bottom plate in a ring shape, an extension spring is fixedly installed in the bottom plate, a top rod is fixedly connected to the extension spring, a support seat is fixedly installed on the bottom plate, a plug hole is provided in the support seat, and a sand core is installed in the plug hole.

[0006] Preferably, the extension springs are arranged in a ring shape at equal intervals, and the extension springs are located inside the bottom plate and the template.

[0007] Preferably, the top rod slides inside the bottom plate and the template, the bottom end of the top rod touches the template, and the top end of the top rod is provided in an arc surface structure.

[0008] Preferably, the sand core is connected with the support seat, and the sand core is located at the center of the support seat.

[0009] Preferably, the die assembly mechanism comprises limiting blocks and first hydraulic rods, a plurality of limiting blocks are fixedly connected to the base, a bottom die is slidably connected between any two adjacent limiting blocks, a fixed plate is fixedly connected to the bottom die, a limiting plate is fixedly installed on the fixed plate, a clamping block is clamped to the limiting plate, and a first hydraulic rod is fixedly installed on the clamping block.

[0010] Preferably, the inner wall of the bottom die is in an arc surface structure.

[0011] Preferably, the fixed plate and the limiting block are slidably connected, and the two limiting plates are symmetrically arranged about the first hydraulic rod and the clamping block.

[0012] Preferably, the fixed plate and the bottom die are slidably connected to the base, and the height of the limiting block is equal to the height of the fixed plate and the bottom die.

[0013] Preferably, the extrusion mechanism comprises second hydraulic rods and pressing plates, the top end of the bottom die is provided with a pressing plate, and two groups of second hydraulic rods and a top die are fixedly installed on the pressing plate.

[0014] Preferably, the two groups of second hydraulic rods are symmetrically arranged, and the top die is clamped to the plurality of bottom dies.

[0015] The beneficial effects of the present application are as follows: the sand core is installed in the plug-in hole part of the supporting seat, the setting of the sand core can make the hub pressure casting have a hollow space inside, thereby reducing the waste of pressure casting material and improving the structural strength and durability of the hub; during pressure casting, the plurality of die assembly mechanisms are slid on the base and are spliced together, the extrusion mechanism can be clamped to the die assembly mechanism by sliding downward, the equipment can make the molten metal enter the inside of the die assembly mechanism under a low pressure, the molten metal moves under a constant pressure and solidifies in the die cavity part formed between the extrusion mechanism and the die assembly mechanism, after the mold is cooled, the extrusion mechanism can drive the pressure-cast hub to move upward by resetting, the top rod can generate a force on the bottom end of the hub under the reaction force of the extension spring, thereby making the hub move upward with the extrusion mechanism, and the hub can be taken out from the die assembly mechanism. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present application;

[0017] Figure 2 It is Figure 1 the enlarged structure schematic diagram of A part shown in the figure;

[0018] Figure 3 It is a connection structure schematic diagram of the first hydraulic rod and the clamping block of the present application;

[0019] Figure 4The connecting structure schematic diagram of the limiting block and the bottom die of the utility model is shown in the figure.

[0020] Figure 5 The connecting structure schematic diagram of the limiting block and the bottom die of the utility model is shown in the figure. Figure 4 The enlarged structure schematic diagram of B part is shown in the figure.

[0021] Figure 6 The connecting structure schematic diagram of the limiting block and the bottom die of the utility model is shown in the figure. Figure 4 The enlarged structure schematic diagram of C part is shown in the figure.

[0022] Figure 7 The connecting structure schematic diagram of the limiting block and the bottom die of the utility model is shown in the figure.

[0023] Figure 8 The connecting structure schematic diagram of the limiting block and the bottom die of the utility model is shown in the figure. Figure 7 The enlarged structure schematic diagram of D part is shown in the figure.

[0024] In the figure: 1, base; 2, die closing mechanism; 201, limiting block; 202, first hydraulic rod; 203, clamping block; 204, limiting plate; 205, fixed plate; 206, bottom die; 3, extrusion mechanism; 301, second hydraulic rod; 302, pressing plate; 303, top die; 4, mounting mechanism; 401, bottom plate; 402, template; 403, sand core; 404, ejector pin; 405, insertion hole; 406, support seat; 407, extension spring. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0026] Please refer to Figures 1-8 As shown in the figure, an aluminum alloy hub low-pressure casting mold with a sand core comprises a base 1, a die closing mechanism 2 is installed on the base 1, an extrusion mechanism 3 is arranged at the top end of the die closing mechanism 2, a mounting mechanism 4 is fixed on the base 1, the mounting mechanism 4 comprises a bottom plate 401 and a template 402, the top end of the base 1 is fixedly connected with the bottom plate 401, a plurality of groups of templates 402 are fixedly and equidistantly installed in a ring shape on the bottom plate 401, an extension spring 407 is fixedly installed in the bottom plate 401, an ejector pin 404 is fixedly connected with the extension spring 407, a support seat 406 is fixedly installed on the bottom plate 401, an insertion hole 405 is arranged in the support seat 406, and a sand core 403 is clamped and installed at the insertion hole 405.

[0027] As a technical optimization scheme of the utility model, the telescopic springs 407 are arranged equidistantly in a ring, and the telescopic springs 407 are located inside the bottom plate 401 and the mold plate 402, so that the telescopic springs 407 can drive the top rod 404 to reset when the top die 303 is separated from the bottom die 206.

[0028] As a technical optimization scheme of the utility model, the top rod 404 slides inside the bottom plate 401 and the mold plate 402, the bottom end of the top rod 404 abuts against the mold plate 402, the top end of the top rod 404 is arranged in an arc surface structure, and the top rod 404 can conveniently demold the wheel hub after the wheel hub is pressure-cast.

[0029] As a technical optimization scheme of the utility model, the sand core 403 is clamped and connected with the support seat 406, the sand core 403 is located at the central part of the support seat 406, and the sand core 403 is installed into the support seat 406 before pressure casting, so that the hollow space inside the wheel hub can be realized.

[0030] As a technical optimization scheme of the utility model, the mold closing mechanism 2 comprises a limiting block 201 and a first hydraulic rod 202, a plurality of limiting blocks 201 are fixedly connected on the base 1, a bottom die 206 is slidably connected between any two adjacent limiting blocks 201, a fixed plate 205 is fixedly connected on the bottom die 206, a limiting plate 204 is fixedly installed on the fixed plate 205, a clamping block 203 is clamped and connected on the limiting plate 204, and the first hydraulic rod 202 is fixedly installed on the clamping block 203, so that the fixed plate 205 and the bottom die 206 can slide, and a plurality of bottom dies 206 can be spliced together.

[0031] As a technical optimization scheme of the utility model, the limiting blocks 201 are located at the four corner parts of the top end of the base 1, and the inner wall of the bottom die 206 is arranged in an arc surface structure, so that a plurality of bottom dies 206 can be combined into a circle, and the wheel hub can be pressure-cast.

[0032] As a technical optimization scheme of the utility model, the fixed plate 205 is slidably connected with the limiting block 201, the limiting plates 204 are symmetrically arranged about the first hydraulic rod 202 and the clamping block 203, the limiting plate 204 limits the clamping block 203, and the first hydraulic rod 202 can drive the clamping block 203 to move while driving the limiting plate 204 to slide.

[0033] As a technical optimization scheme of the utility model, the fixed plate 205 and the bottom die 206 are slidably connected with the base 1, the height of the limiting block 201 is equal to the height of the fixed plate 205 and the bottom die 206, and the bottom die 206 can be demolded when sliding to the outside of the base 1.

[0034] As a technical optimization scheme of the utility model, the extrusion mechanism 3 includes second hydraulic rod 301 and pressing plate 302, the top end of bottom die 206 is equipped with pressing plate 302, two groups of second hydraulic rod 301 and top die 303 are fixedly installed on pressing plate 302, second hydraulic rod 301 drives pressing plate 302 to slide down, can make top die 303 engage into several bottom dies 206.

[0035] As a technical optimization scheme of the utility model, two groups of second hydraulic rod 301 are symmetrically arranged, top die 303 is engaged with several bottom dies 206, and top die 303 drives the sliding of die-cast hub, so that the operator can take down the hub.

[0036] In use, first, before low-pressure casting of the hub, the operator can install sand core 403 to the insertion hole 405 part of support seat 406, support seat 406 is located at the center part of bottom plate 401, the setting of sand core 403 can generate hollow space in the hub during die casting, thereby facilitating the reduction of waste of die casting material and the improvement of structural strength and durability of the hub; during die casting, the control switch of first hydraulic rod 202 is started, the telescopic end drives the sliding of clamping block 203 towards the template 402, clamping block 203 is located between two limiting plates 204, limiting plate 204 is fixedly connected with fixed plate 205, when limiting plate 204 drives the sliding of fixed plate 205, the bottom die 206 fixed to the side wall of fixed plate 205 can slide along base 1, and several bottom dies 206 can be connected in a circular shape when sliding along the side wall of limiting block 201 fixed to base 1, the inner wall of bottom die 206 is arranged in an arc surface structure, thereby facilitating the die-casting of the hub in the later period; the control switch of second hydraulic rod 301 is opened, which drives the sliding of pressing plate 302 towards base 1, top die 303 is fixed to pressing plate 302, when top die 303 slides to the engaged state with several bottom dies 206, molten metal enters the cavity die formed by top die 303 and several bottom dies 206 at a low pressure, the molten metal moves under constant pressure and solidifies at the die cavity part, after the mold is cooled, the reset of top die 303 can drive the upward movement of the die-cast hub, the upward movement of the hub with top die 303 can take it out of bottom die 206 under the action of top rod 404 on the bottom end of the hub under the reaction force of telescopic spring 407.

[0037] It is apparent for a person skilled in the art that the present application is not limited to the details of the above-described exemplary embodiments, but that it can be implemented in other concrete forms without departing from the spirit or the essential characteristics of the present application. Therefore, the embodiments should be considered as exemplary and non-limiting, the scope of the present application being defined by the claims appended hereto rather than by the above description, and all the changes which fall within the meaning and the scope of the equivalent elements of the claims are intended to be embraced therein. Any reference signs in the claims should not be construed as limiting the claims to the figures in which the reference signs are used.

[0038] Furthermore, it should be understood that although the present specification is described in terms of embodiments, not every embodiment according to the present specification needs to exhibit each and every characteristic specified in the present specification. The specification can also be described in terms of a single preferred embodiment, it being understood that this single preferred embodiment can exhibit not every aspect or feature of the present specification. The specification can also be described in terms of a generic statement that the disclosure can include one, some, or all of a list of features. It is further understood that the specification is to be considered as a whole and not with reference to a single feature or design element alone.

Claims

1. An aluminum alloy wheel low pressure casting mold having a sand core, comprising a base (1), characterized in that: The base (1) is provided with a mold closing mechanism (2), the top end of the mold closing mechanism (2) is provided with an extrusion mechanism (3), the base (1) is fixedly provided with a mounting mechanism (4), the mounting mechanism (4) comprises a bottom plate (401) and a mold plate (402), the top end of the base (1) is fixedly connected with the bottom plate (401), a plurality of groups of mold plates (402) are fixedly and equidistantly arranged on the bottom plate (401) in a ring shape, a telescopic spring (407) is fixedly arranged in the bottom plate (401), the telescopic spring (407) is fixedly connected with a top rod (404), a supporting seat (406) is fixedly arranged on the bottom plate (401), the supporting seat (406) is provided with a socket (405), and a sand core (403) is clamped and arranged at the socket (405).

2. The low pressure casting mold for an aluminum alloy wheel hub with a sand core according to claim 1, characterized by: A plurality of telescopic springs (407) are arranged equidistantly in a ring shape and are located inside the bottom plate (401) and the mold plate (402).

3. The low pressure casting mold for an aluminum alloy wheel hub with a sand core according to claim 1, characterized by: The top rod (404) slides inside the bottom plate (401) and the mold plate (402), the bottom end of the top rod (404) abuts against the mold plate (402), and the top end of the top rod (404) is provided in an arc surface structure.

4. The low pressure casting mold for an aluminum alloy wheel hub with a sand core according to claim 1, characterized by: The sand core (403) is clamped and connected with the supporting seat (406), and the sand core (403) is located at the center of the supporting seat (406).

5. The low pressure casting mold for an aluminum alloy wheel hub with a sand core according to claim 1, characterized by: The mold closing mechanism (2) comprises a limiting block (201) and a first hydraulic rod (202), a plurality of limiting blocks (201) are fixedly connected to the base (1), a bottom die (206) is slidably connected between any two adjacent limiting blocks (201), a fixed plate (205) is fixedly connected to the bottom die (206), a limiting plate (204) is fixedly arranged on the fixed plate (205), a clamping block (203) is clamped and connected to the limiting plate (204), and the clamping block (203) is fixedly provided with the first hydraulic rod (202).

6. An aluminum alloy wheel low pressure casting mold having a sand core according to claim 5, characterized in that: A plurality of limiting blocks (201) are respectively located at the four corner positions of the top end of the base (1), and the inner wall of the bottom die (206) is provided in an arc surface structure.

7. The low pressure casting mold for an aluminum alloy wheel hub with a sand core according to claim 5, characterized by: The fixed plate (205) is slidably connected with the limiting block (201), and the two limiting plates (204) are symmetrically arranged about the first hydraulic rod (202) and the clamping block (203).

8. The low pressure casting mold for an aluminum alloy wheel hub with a sand core according to claim 5, characterized by: The fixed plate (205) and the bottom die (206) are slidably connected with the base (1), and the height of the limiting block (201) is equal to the height of the fixed plate (205) and the bottom die (206).

9. The low pressure casting mold for an aluminum alloy wheel hub with a sand core according to claim 5, characterized by: The extrusion mechanism (3) comprises a second hydraulic rod (301) and a pressing plate (302), the top end of the bottom die (206) is provided with the pressing plate (302), the pressing plate (302) is fixedly provided with two groups of second hydraulic rods (301) and a top die (303).

10. The low pressure casting mold for an aluminum alloy wheel hub with a sand core according to claim 9, characterized by: ​

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