Die for casting silicon carbide aluminum ceramic composite material

Abstract

The utility model discloses a mould for casting a silicon carbide aluminum ceramic composite material, which relates to the technical field of casting moulds and comprises a base, a U-shaped frame is connected to the upper end of the base, a lifting frame is mounted on the lower end face of a horizontal section of the U-shaped frame, a movable mould is mounted on the lifting frame, a fixed mould is fixed in the middle of the upper end face of the base, and the movable mould is in a circular ring shape. And a mold cavity is formed in the bottom of the movable mold. According to the utility model, the detachable forming seat is mounted on the movable mold, so that when a casting is formed and the bottom of the movable mold is clamped into the fixed mold, a smelted silicon carbide aluminum ceramic composite material is calendered into the mold cavity to be formed by utilizing the pressure of the forming seat and the conical column, and the flow speed of the composite material is increased; the problem that the material fluidity is poor is solved, gas in the casting forming process can be exhausted through the exhaust holes in the heat dissipation ribs, the yield of casting air holes can be increased, dissipation of heat on the surface of the movable mold is accelerated through the fan, and therefore the casting forming efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of casting mold technology, and in particular to a mold for casting silicon carbide aluminum ceramic composite materials. Background Technology

[0002] With the rapid development of modern industry, the demand for high-performance components is increasing daily. Silicon carbide aluminum ceramic composites, with their excellent high hardness, high strength, high temperature resistance, and wear resistance, are widely used in many key fields such as aerospace, automotive manufacturing, and machining. However, when using this material for casting, traditional molds reveal many insurmountable drawbacks. The poor fluidity of silicon carbide aluminum ceramic composites in the liquid state makes filling the mold cavity extremely difficult, easily leading to incomplete casting defects.

[0003] The existing technology can be referenced in Chinese Patent Publication No. CN113000817A, which discloses a die and method for extruding and casting aluminum alloy infiltration of silicon carbide composite materials. The die includes a moving mold core, a fixed mold core, and a sprue bushing. The moving mold core and the fixed mold core are each equipped with three heating rods. Molten aluminum slowly enters the cavity from the sprue bushing through the runner. Upon completion of filling, the speed is switched to pressure, and the punch continues to apply pressure until the product solidifies. While this technology improves the filling effect to some extent and reduces the probability of porosity, it still has shortcomings when dealing with the special casting requirements of silicon carbide aluminum-ceramic composite materials. It does not effectively solve the fundamental problem of poor material fluidity, and its improvement in filling effect for complex cavities is limited.

[0004] Therefore, a mold for casting silicon carbide aluminum ceramic composite materials is provided. Utility Model Content

[0005] To address the shortcomings of existing technologies, this invention provides a mold for casting silicon carbide aluminum ceramic composite materials. By installing a detachable forming seat on the moving mold, during the forming process of the casting, the bottom of the moving mold is engaged with the fixed mold. The pressure of the forming seat and the conical column is used to roll the molten silicon carbide aluminum ceramic composite material into the mold cavity, thereby improving the flow rate of the composite material and solving the problem of poor material flowability. Furthermore, the vent holes on the heat dissipation fins allow the gas during the casting process to be discharged, which helps to improve the porosity of the casting. The fan accelerates the dissipation of heat from the surface of the moving mold, thereby improving the efficiency of casting shaping and overcoming the shortcomings of existing technologies.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A mold for casting silicon carbide aluminum ceramic composite material includes a base, a U-shaped frame connected to the upper end of the base, a lifting frame installed on the lower end face of the horizontal section of the U-shaped frame, a movable mold installed on the lifting frame, and a fixed mold fixed in the middle of the upper end face of the base.

[0008] The moving mold is annular, and a mold cavity is provided at the bottom of the moving mold. The mold cavity is provided with heat dissipation ribs, and an exhaust hole is provided at the top of the heat dissipation ribs. A molding seat is connected to the lower middle part of the mold cavity.

[0009] As a further embodiment of this utility model: a tapered column is provided at the lower end of the molding seat, and protrusions are provided at equal intervals on the outer wall of the molding seat, with a gap between two adjacent protrusions.

[0010] As a further improvement of this utility model, the upper end of the moving mold is provided with reinforcing ribs.

[0011] As a further embodiment of this utility model: the lifting frame includes two hydraulic push rods symmetrically installed on the lower end face of the horizontal section of the U-shaped frame, and the lower ends of the two hydraulic push rods are connected to a U-shaped rod. The outer wall of the moving mold has two connecting ears symmetrically fixed, and the vertical sections on both sides of the U-shaped rod are respectively connected to the upper ends of the two connecting ears.

[0012] As a further improvement of this utility model: the horizontal section of the U-shaped rod is fitted with two bolts, and the lower ends of the two bolts are screwed to the top of the forming seat.

[0013] As a further improvement of this utility model: the top side of the protrusion is provided with a step, which is engaged with the inner bottom of the moving mold.

[0014] As a further improvement of this utility model: a support ring is provided on the horizontal section of the U-shaped rod, and fans are installed at equal intervals on the support ring.

[0015] As a further improvement of this utility model, fixing holes are provided at all four corners of the base.

[0016] The beneficial effects of this utility model are as follows:

[0017] By installing a detachable forming seat on the moving mold, during the forming of the casting, the bottom of the moving mold is engaged with the fixed mold. The pressure of the forming seat and the conical column is used to roll the molten silicon carbide aluminum ceramic composite material into the mold cavity, thereby improving the flow rate of the composite material and solving the problem of poor material flowability. Furthermore, the vent holes on the heat dissipation fins allow the gas during the casting process to be discharged, which helps to improve the porosity of the casting. The fan accelerates the dissipation of heat from the surface of the moving mold, thereby improving the efficiency of casting shaping. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of a mold for casting silicon carbide aluminum ceramic composite materials proposed in this utility model.

[0019] Figure 2 This is a first-view partial structural schematic diagram of a mold for casting silicon carbide aluminum ceramic composite materials proposed in this utility model.

[0020] Figure 3 This is a partial structural diagram from a second perspective of a mold for casting silicon carbide aluminum ceramic composite materials proposed in this utility model.

[0021] Figure 4 This utility model proposes a mold for casting silicon carbide aluminum ceramic composite materials. Figure 3 Enlarged structural diagram at point A in the middle.

[0022] In the diagram: 1. Base; 2. U-shaped frame; 3. Bolt; 4. Hydraulic push rod; 5. U-shaped rod; 6. Support ring; 7. Moving mold; 8. Fixed mold; 9. Fan; 10. Mold cavity; 11. Conical column; 12. Forming seat; 13. Protrusion; 14. Vent hole; 15. Connecting ear; 16. Reinforcing rib; 17. Heat dissipation rib. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0024] Example 1, referring to Figure 1-4 A mold for casting silicon carbide aluminum ceramic composite material includes a base 1, a U-shaped frame 2 connected to the upper end of the base 1, a lifting frame installed on the lower end face of the horizontal section of the U-shaped frame 2, a movable mold 7 installed on the lifting frame, a fixed mold 8 fixed in the middle of the upper end face of the base 1, and fixing holes provided at the four corners of the base 1. The base 1 is fixed to the installation position through the fixing holes by bolts.

[0025] The moving mold 7 is annular, and a mold cavity 10 is provided at the bottom of the moving mold 7. A heat dissipation rib 17 is provided on the mold cavity 10, and an exhaust hole 14 is provided at the top of the heat dissipation rib 17. A molding seat 12 is connected to the lower middle part of the mold cavity 10, and a reinforcing rib 16 is provided at the upper end of the moving mold 7.

[0026] A tapered column 11 is provided at the lower end of the molding base 12, and protrusions 13 are provided at equal intervals on the outer wall of the molding base 12, with a gap between two adjacent protrusions 13.

[0027] The lifting frame includes two hydraulic push rods 4 symmetrically installed on the lower end of the horizontal section of the U-shaped frame 2. The lower ends of the two hydraulic push rods 4 are connected to U-shaped rods 5. Two connecting ears 15 are symmetrically fixed on the outer wall of the moving mold 7. The vertical sections on both sides of the U-shaped rod 5 are respectively connected to the upper ends of the two connecting ears 15.

[0028] Two bolts 3 are inserted into the horizontal section of the U-shaped rod 5. The lower ends of the two bolts 3 are screwed to the top of the forming seat 12, which facilitates the installation and disassembly of the forming seat 12.

[0029] The top side of the protrusion 13 is provided with a step, which is engaged with the bottom inner side of the moving mold 7 to improve the stability of the connection between the forming seat 12 and the moving mold 7 and prevent the two from shaking relative to each other.

[0030] The smelted silicon carbide aluminum ceramic composite material is injected into the fixed mold 8. The U-shaped rod 5 and the moving mold 7 are pushed down by the hydraulic push rod 4, so that the bottom of the moving mold 7 is stuck into the fixed mold 8. The silicon carbide aluminum ceramic composite material is formed in the mold cavity 10 by the die casting extension action of the forming seat 12 and the conical column 11. The gas in the casting process can be discharged through the vent hole 14 on the heat dissipation fin 17, which helps to improve the porosity qualification rate of the casting.

[0031] Example 2 is an optimization based on Example 1. Specifically, a support ring 6 is provided on the horizontal section of the U-shaped rod 5, and fans 9 are installed at equal intervals on the support ring 6.

[0032] After the casting is formed, the heat on the surface of the moving mold 7 is dissipated by turning on the fan 9, thereby improving the efficiency of casting solidification.

[0033] The exemplary embodiments of the present invention have been described in detail herein with reference to examples. However, those skilled in the art will understand that various modifications and alterations can be made to the specific embodiments described above without departing from the spirit of the present invention, and various combinations can be made to the various technical features and structures proposed in the present invention without exceeding the protection scope of the present invention, which is determined by the appended claims. The foregoing description of specific exemplary embodiments of the present invention is not intended to limit the present invention to the precise forms disclosed, and it is obvious that many changes and variations can be made based on the above teachings. The exemplary embodiments were chosen and described in order to explain the specific principles of the present invention and its practical applications, thereby enabling those skilled in the art to implement and utilize various different exemplary embodiments of the present invention, as well as various different choices and variations. The scope of the present invention is intended to be defined by the claims and their equivalents.

Claims

1. A mold for casting silicon carbide aluminum ceramic composite materials, comprising a base (1), characterized in that, The upper end of the base (1) is connected to a U-shaped frame (2), and a lifting frame is installed on the lower end of the horizontal section of the U-shaped frame (2). A moving mold (7) is installed on the lifting frame, and a fixed mold (8) is fixed in the middle of the upper end of the base (1). The moving mold (7) is annular, and a mold cavity (10) is provided at the bottom of the moving mold (7). A heat dissipation rib (17) is provided on the mold cavity (10), and an exhaust hole (14) is provided at the top of the heat dissipation rib (17). A molding seat (12) is connected to the lower middle part of the mold cavity (10).

2. The mold for casting silicon carbide aluminum ceramic composite materials according to claim 1, characterized in that, The lower end of the forming base (12) is provided with a tapered column (11), and the outer wall of the forming base (12) is provided with protrusions (13) at equal intervals, with a gap between two adjacent protrusions (13).

3. The mold for casting silicon carbide aluminum ceramic composite materials according to claim 1, characterized in that, The upper end of the moving mold (7) is provided with reinforcing ribs (16).

4. The mold for casting silicon carbide aluminum ceramic composite materials according to claim 2, characterized in that, The lifting frame includes two hydraulic push rods (4) symmetrically installed on the lower end of the horizontal section of the U-shaped frame (2). The lower ends of the two hydraulic push rods (4) are connected to U-shaped rods (5). The outer wall of the moving mold (7) is symmetrically fixed with two connecting ears (15). The vertical sections on both sides of the U-shaped rods (5) are respectively connected to the upper ends of the two connecting ears (15).

5. The mold for casting silicon carbide aluminum ceramic composite materials according to claim 4, characterized in that, The horizontal section of the U-shaped rod (5) is fitted with two bolts (3), and the lower ends of the two bolts (3) are screwed to the top of the forming seat (12).

6. The mold for casting silicon carbide aluminum ceramic composite materials according to claim 5, characterized in that, The top side of the protrusion (13) is provided with a step, which is engaged with the inner bottom of the moving mold (7).

7. The mold for casting silicon carbide aluminum ceramic composite materials according to claim 4, characterized in that, A support ring (6) is provided on the horizontal section of the U-shaped rod (5), and fans (9) are installed at equal intervals on the support ring (6).

8. The mold for casting silicon carbide aluminum ceramic composite materials according to claim 1, characterized in that, The base (1) has fixing holes at all four corners.

Images