Casting mold capable of preventing shrinkage porosity of casting

Abstract

The utility model relates to the technical field of casting molds, in particular to a casting mold capable of preventing shrinkage porosity of a casting, which comprises an L-shaped base, a transverse plate is fixedly connected to the upper end face of the base, a vibration mechanism is arranged above the base and comprises a rotating shaft, and a rotating disc is fixedly connected to the right end face of the rotating shaft. The right end face of the rotary disc is fixedly connected with an eccentric shaft, the outer wall of the eccentric shaft is movably connected with a connecting rod through a bearing, the second motor drives the rotary shaft to rotate, the rotary shaft drives the eccentric shaft to rotate while driving the rotary disc to rotate, the eccentric shaft drives the connecting rod to move up and down while rotating, and then the tray, the lower die cavity and the upper die cavity are driven to vibrate up and down. The lower die cavity and the liquid in the upper die cavity continuously oscillate, air dissolved in the liquid overflows from the liquid in the oscillation process and then is discharged through the exhaust hole, and therefore the purposes that the air in the liquid in the die cavity can be discharged, and shrinkage porosity of a casting is prevented are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of casting moulds, in particular to a casting mould for preventing casting shrinkage. Background Art

[0002] Casting molds are a process used to obtain the structural shape of parts. The structural shape of the part is made of other easily moldable materials in advance, and then the mold is placed in the sand mold to form a cavity with the same size as the structural size of the part. Then, a flowing liquid is poured into the cavity, and after the liquid solidifies, a part with the same shape and structure as the mold is formed. Casting shrinkage refers to shrinkage defects such as holes or pores in the casting.

[0003] Existing casting molds usually use extrusion to expel the gas in the mold cavity, but only the gas on the upper surface of the mold cavity can be expelled by extrusion, while the gas squeezed into the inside of the casting cannot be expelled, forming defects such as pores and shrinkage cavities during the liquid solidification process, affecting the performance and quality of the casting. Therefore, it is necessary to propose a casting mold that prevents shrinkage of the casting to solve the above-mentioned problems. Utility Model Content

[0004] The utility model aims to provide a casting mold for preventing shrinkage of castings, which has the characteristics of being able to discharge gas inside the liquid in the mold cavity and preventing shrinkage of castings.

[0005] The utility model aims to provide a casting mold for preventing shrinkage of castings, comprising an "L"-shaped base, the upper end surface of the base is fixedly connected to a horizontal plate, a vibration mechanism is arranged above the base, the vibration mechanism comprises a rotating shaft, the right end surface of the rotating shaft is fixedly connected to a turntable, the right end surface of the turntable is fixedly connected to an eccentric shaft, the outer wall of the eccentric shaft is movably connected to a connecting rod through a bearing, the other end of the connecting rod is movably connected to a support rod through a rotating shaft, the upper end surface of the support rod passes through the horizontal plate and is movably connected to the horizontal plate, the other end of the horizontal plate is fixedly connected to a support plate, the upper end surface of the support plate is fixedly connected to a lower mold cavity, and an upper mold cavity is arranged above the lower mold cavity.

[0006] In order to facilitate the downward movement of the upper mold cavity, as a preferred casting mold for preventing shrinkage of the casting in the utility model, the left end face of the lower mold cavity is fixedly connected to a lower support plate, and the lower end face of the lower support plate is installed with a first motor, the output end of the first motor passes through the support plate and is fixedly connected to a screw rod, the outer wall of the screw rod is threadedly connected to the upper support plate, and the right end face of the upper support plate is fixedly connected to the upper mold cavity.

[0007] In order to facilitate the driving of the rotating shaft to rotate, as a preferred casting mold for preventing casting shrinkage of the utility model, a second motor is installed on the left end face of the base, and the output end of the second motor passes through the base and is fixedly connected to the rotating shaft.

[0008] In order to facilitate the exhaust of gas inside the upper membrane cavity and the lower membrane cavity, as a preferred casting mold for preventing casting shrinkage of the utility model, the upper end surface of the upper membrane cavity is penetrated with a plurality of evenly distributed exhaust holes.

[0009] In order to prevent the upper mold cavity from axially rotating, as a preferred casting mold for preventing shrinkage of castings in the utility model, the right end face of the lower mold cavity is fixedly connected to a fixed plate, the upper end face of the fixed plate is fixedly connected to a limiting rod, and the outer wall of the limiting rod is slidably connected to the upper mold cavity.

[0010] In order to prevent the upper mold cavity from being separated from the limiting rod, as a preferred casting mold for preventing casting shrinkage of the utility model, the upper end surface of the limiting rod is fixedly connected to the limiting block.

[0011] In order to facilitate the injection of casting liquid into the mold cavity, as a preferred casting mold for preventing casting shrinkage of the utility model, an injection hole is opened on the upper end surface of the upper mold cavity.

[0012] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0013] The utility model drives the rotating shaft to rotate by a second motor, and the rotating shaft drives the turntable to rotate while driving the eccentric shaft to rotate. The eccentric shaft drives the connecting rod to move up and down while driving the supporting rod to move up and down, and then drives the tray, the lower mold cavity and the upper mold cavity to vibrate up and down, so that the lower mold cavity and the liquid inside the upper mold cavity are constantly oscillating, and the air dissolved in the liquid overflows from the liquid during the oscillation process and is discharged through the exhaust hole, thereby achieving the purpose of discharging the gas inside the liquid in the mold cavity and preventing the casting from shrinking. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is the overall structure diagram of the utility model;

[0015] Figure 2 It is the overall left-side structural diagram of the utility model;

[0016] Figure 3 This is a structural diagram of the vibration mechanism of the utility model.

[0017] In the figure: 1. base; 2. rotating shaft; 3. turntable; 4. eccentric shaft; 5. connecting rod; 6. support rod; 7. cross plate; 8. lower mold cavity; 9. support plate; 10. exhaust hole; 11. upper mold cavity; 12. fixing plate; 13. screw rod; 14. support plate; 15. upper support plate; 16. limit block; 17. injection hole; 18. second motor; 19. first motor; 20. limit rod. DETAILED DESCRIPTION

[0018] See also Figures 1 to 3 A casting mold for preventing shrinkage of castings includes an "L"-shaped base 1, the upper end surface of the base 1 is fixedly connected to a horizontal plate 7, a vibration mechanism is arranged above the base 1, and the vibration mechanism includes a rotating shaft 2, a turntable 3 is fixedly connected to the right end surface of the rotating shaft 2, an eccentric shaft 4 is fixedly connected to the right end surface of the turntable 3, a connecting rod 5 is movably connected to the outer wall of the eccentric shaft 4 through a bearing, the other end of the connecting rod 5 is movably connected to a supporting rod 6 through a rotating shaft, the upper end surface of the supporting rod 6 passes through the horizontal plate 7 and is movably connected to the horizontal plate 7, the other end of the horizontal plate 7 is fixedly connected to a supporting plate 14, the upper end surface of the supporting plate 14 is fixedly connected to a lower mold cavity 8, and an upper mold cavity 11 is arranged above the lower mold cavity 8.

[0019] In the present embodiment: the rotating shaft 2 is driven to rotate by the second motor 18, the rotating shaft 2 drives the turntable 3 to rotate while driving the eccentric shaft 4 to rotate, the eccentric shaft 4 rotates while driving the connecting rod 5 to move up and down, thereby driving the support rod 6 to move up and down, thereby driving the support plate 14, the lower mold cavity 8 and the upper mold cavity 11 to vibrate up and down, so that the lower mold cavity 8 and the liquid inside the upper mold cavity 11 are constantly oscillating, and the air dissolved in the liquid overflows from the liquid during the oscillation process and is discharged through the exhaust hole 10, thereby achieving the purpose of discharging the gas inside the liquid in the mold cavity and preventing the casting from shrinking.

[0020] As a technical optimization scheme of the utility model, the left end face of the lower mold cavity 8 is fixedly connected to the lower support plate 9, and the lower end face of the lower support plate 9 is installed with a first motor 19. The output end of the first motor 19 passes through the support plate 9 and is fixedly connected to a screw rod 13. The outer wall of the screw rod 13 is threadedly connected to an upper support plate 15, and the right end face of the upper support plate 15 is fixedly connected to the upper mold cavity 11.

[0021] In this embodiment: the first motor 19 can drive the screw rod 13 to rotate, and when the screw rod 13 rotates, it can drive the upper support plate 15 to move up and down, so as to facilitate the upper mold cavity 11 to move up and down, and further facilitate the cooperation between the upper mold cavity 11 and the lower mold cavity 8.

[0022] As a technical optimization solution of the present invention, a second motor 18 is installed on the left end surface of the base 1 , and the output end of the second motor 18 passes through the base 1 and is fixedly connected to the rotating shaft 2 .

[0023] In this embodiment: the second motor 18 is used to drive the rotating shaft 2 to rotate.

[0024] As a technical optimization solution of the present invention, a plurality of evenly distributed exhaust holes 10 are formed through the upper end surface of the upper mold cavity 11 .

[0025] In this embodiment, the gas inside the upper mold cavity 11 and the lower mold cavity 8 can be discharged through the exhaust hole 10.

[0026] As a technical optimization solution of the utility model, the right end face of the lower mold cavity 8 is fixedly connected to the fixed plate 12, the upper end face of the fixed plate 12 is fixedly connected to the limiting rod 20, and the outer wall of the limiting rod 20 is slidably connected to the upper mold cavity 11.

[0027] In this embodiment: the upper mold cavity 11 is prevented from axially rotating by the limiting rod 20 .

[0028] As a technical optimization solution of the present utility model, the upper end surface of the limiting rod 20 is fixedly connected to the limiting block 16 .

[0029] In this embodiment, the limiting block 16 can prevent the upper mold cavity 11 from being separated from the limiting rod 20, thereby preventing the normal operation of the equipment from being affected.

[0030] As a technical optimization solution of the present utility model, an injection hole 17 is opened on the upper end surface of the upper mold cavity 11 .

[0031] In this embodiment, liquid can be conveniently injected into the mold cavity through the injection hole 17 .

[0032] Working principle: When in use, first start the first motor 19 to drive the screw 13 to rotate. When the screw 13 rotates, it can drive the upper support plate 15 to move up and down, which is convenient for driving the upper mold cavity 11 to move up and down, and then facilitates the upper mold cavity 11 to cooperate with the lower mold cavity 8. Then, the liquid can be conveniently injected into the mold cavity through the injection hole 17, and then the second motor 18 is started to drive the rotating shaft 2 to rotate. The rotating shaft 2 drives the turntable 3 to rotate while driving the eccentric shaft 4 to rotate. The eccentric shaft 4 rotates while driving the connecting rod 5 to move up and down, thereby driving the support rod 6 to move up and down, and then driving the support plate 14, the lower mold cavity 8 and the upper mold cavity 11 to vibrate up and down, so that the lower mold cavity 8 is constantly oscillating with the liquid inside the upper mold cavity 11, and the air dissolved in the liquid overflows from the liquid during the oscillation process and is discharged through the exhaust hole 10, thereby achieving the purpose of discharging the gas inside the liquid in the mold cavity and preventing the casting from shrinking.

[0033] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A casting mold for preventing shrinkage of castings, comprising an L-shaped base (1), characterized in that: The upper end surface of the base (1) is fixedly connected to a transverse plate (7), and a vibration mechanism is arranged above the base (1), the vibration mechanism comprises a rotating shaft (2), the right end surface of the rotating shaft (2) is fixedly connected to a turntable (3), the right end surface of the turntable (3) is fixedly connected to an eccentric shaft (4), the outer wall of the eccentric shaft (4) is movably connected to a connecting rod (5) via a bearing, the other end of the connecting rod (5) is movably connected to a support rod (6) via a rotating shaft, the upper end surface of the support rod (6) passes through the transverse plate (7) and is movably connected to the transverse plate (7), the other end of the transverse plate (7) is fixedly connected to a support plate (14), the upper end surface of the support plate (14) is fixedly connected to a lower mold cavity (8), and an upper mold cavity (11) is arranged above the lower mold cavity (8).

2. A casting mold for preventing casting shrinkage according to claim 1, characterized in that: The left end face of the lower mold cavity (8) is fixedly connected to a lower support plate (9), the lower end face of the lower support plate (9) is mounted with a first motor (19), the output end of the first motor (19) passes through the support plate (9) and is fixedly connected to a screw rod (13), the outer wall of the screw rod (13) is threadedly connected to an upper support plate (15), and the right end face of the upper support plate (15) is fixedly connected to the upper mold cavity (11).

3. A casting mold for preventing casting shrinkage according to claim 1, characterized in that: A second motor (18) is installed on the left end surface of the base (1), and an output end of the second motor (18) passes through the base (1) and is fixedly connected to the rotating shaft (2).

4. A casting mold for preventing casting shrinkage according to claim 1, characterized in that: The upper end surface of the upper mold cavity (11) is penetrated by a plurality of evenly distributed exhaust holes (10).

5. A casting mold for preventing casting shrinkage according to claim 1, characterized in that: The right end surface of the lower mold cavity (8) is fixedly connected to a fixed plate (12), the upper end surface of the fixed plate (12) is fixedly connected to a limiting rod (20), and the outer wall of the limiting rod (20) is slidably connected to the upper mold cavity (11).

6. A casting mold for preventing casting shrinkage according to claim 5, characterized in that: The upper end surface of the limiting rod (20) is fixedly connected to the limiting block (16).

7. A casting mold for preventing casting shrinkage according to claim 1, characterized in that: An injection hole (17) is provided on the upper end surface of the upper mold cavity (11).

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