Self-cleaning exhaust device

Abstract

The application discloses a self-cleaning exhaust device, which comprises a moving plate moving together with an upper die and a fixed plate fixed on a lower die, an exhaust gap is left between the moving plate and the fixed plate for overflow exhaust during die casting, an exhaust cavity is arranged in the moving plate for ensuring that air pressure is greater than atmospheric pressure during die casting, flat push ejectors are arranged in the exhaust cavity, strip-shaped grooves are arranged on the moving plate for upward pushing of upper ends of the flat push ejectors respectively, a moving assembly is arranged in the exhaust cavity and capable of moving the flat push ejectors up and down, when the upper die and the lower die are combined, top surfaces of the flat push ejectors are flush with a top surface of the moving plate, when the upper die leaves the lower die, the flat push ejectors are pushed upward by the moving assembly so that the top surfaces of the flat push ejectors are higher than the top surface of the moving plate, when the flat push ejectors move upward, the gas in the exhaust cavity can be synchronously moved upward, and the thin sheets condensed between the exhaust gaps can be pushed out, so that the self-cleaning of the exhaust gaps is realized.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of exhaust of die casting mold, and particularly relates to a self-cleaning exhaust device. BACKGROUND

[0002] In the die casting mold, for the convenience of the exhaust of the gas in the mold cavity, an exhaust overflow structure is arranged in the mold, and meanwhile, part of the aluminum liquid will flow out along the exhaust overflow structure during the die casting. The exhaust overflow structure comprises an overflow groove arranged between the upper mold and the lower mold and a tooth-shaped exhaust gap at the end of the overflow groove away from the mold cavity. In use, part of the aluminum liquid flowing into the tooth-shaped exhaust gap condenses to form a sheet, and in order to ensure normal die casting next time, the exhaust gap will be cleaned before the next die casting. In the prior art, the exhaust gap is manually cleaned after each die casting, which is not only slow and affects the continuity of production, but also is easy to be not cleaned completely, thereby causing the fluctuation of product quality. SUMMARY

[0003] The present application provides a self-cleaning exhaust device which can automatically clean the exhaust gap after the die casting is completed and can ensure the cleanliness of the exhaust gap, thereby ensuring the continuity of production and reducing the fluctuation of product quality.

[0004] To this end, the technical scheme adopted by the present application is as follows: a self-cleaning exhaust device, comprising a moving plate moving together with the upper mold and a fixed plate fixed on the lower mold, an exhaust gap being left between the moving plate and the fixed plate for overflow exhaust during the die casting of the mold, an exhaust cavity being arranged in the moving plate for ensuring that the air pressure is greater than the atmospheric pressure during the die casting, a plurality of flat push pins being arranged in the exhaust cavity and spaced apart along the exhaust direction, a strip-shaped groove being arranged on the moving plate and being in communication with the exhaust cavity and being used for individually pushing the upper end of each flat push pin upward, and a moving assembly being arranged in the exhaust cavity and being used for driving the flat push pins to move up and down, when the upper mold and the lower mold are closed, the top surface of the flat push pin is flush with the top surface of the moving plate, and when the upper mold is separated from the lower mold, the flat push pin is pushed out upward by the moving assembly so that the top surface of the flat push pin is higher than the top surface of the moving plate.

[0005] As a preferred solution of the above-mentioned scheme, the moving plate comprises a bottom plate and a moving cover covering the bottom plate, the bottom surface of the moving cover is upwardly recessed to form an exhaust recess, the exhaust recess and the top surface of the bottom plate are in abutment to enclose the exhaust cavity, and the strip-shaped groove is arranged on the moving cover and is in communication with the exhaust recess.

[0006] Further preferably, the moving assembly comprises a flat push plate which can move up and down in the exhaust cavity, the flat push pins are arranged on the flat push plate, and a plurality of energy storage springs are arranged between the flat push plate and the bottom of the exhaust cavity, when the upper mold and the lower mold are closed, the energy storage springs are in a compressed state, and when the upper mold is separated from the lower mold, the energy storage springs release the tension to just push the flat push plate to move upward.

[0007] Further preferably, a guide pressing rod is arranged on the flat pushing plate, a guide hole communicating with the exhaust cavity is arranged on the moving plate, the upper end of the guide pressing rod is arranged in the guide hole, the flat pushing plate comprises a flat pushing bottom plate and a flat pushing cover plate arranged above the flat pushing bottom plate, and the guide pressing rod and the flat pushing needle are pressed on the flat pushing bottom plate through the flat pushing cover plate.

[0008] Further preferably, an electromagnetic valve is arranged on the right side surface of the moving plate, and the end of the electromagnetic valve communicates with the exhaust cavity.

[0009] Further preferably, a corrugated tooth structure is arranged on the top surface of the moving plate, a concave tooth structure matched with the corrugated tooth structure is arranged on the lower bottom surface of the fixed plate, and the strip-shaped groove is arranged in the concave part of the corrugated tooth structure.

[0010] Further preferably, a guide air groove is arranged on the left and right side surfaces of the flat pushing needle, and a distance is left between the upper end of the guide air groove and the upper end of the flat pushing needle.

[0011] Further preferably, an adjusting assembly for adjusting the up-and-down movement of the moving plate is arranged below the moving plate, the bottom surface of the moving plate and the top surface of the adjusting plate are both arranged as inclined surfaces, the inclined directions of the two inclined surfaces are the same, the right end of the adjusting plate is provided with a displacement assembly for driving the left-and-right movement of the adjusting plate, the up-and-down movement of the moving plate can be driven by the left-and-right movement of the adjusting plate through the displacement assembly, so that the exhaust gap is adjusted.

[0012] Further preferably, a moving seat is arranged outside the moving plate, an adjusting cavity for accommodating the adjusting assembly and the moving plate is arranged in the moving seat, the displacement assembly comprises an adjusting bolt, the adjusting bolt passes through the moving seat and is fixed on the adjusting plate through a fixing structure, the adjusting bolt is screwed with the moving plate, an up-and-down through guide groove is arranged on the adjusting plate, a guide column is arranged in the guide groove, the upper end of the guide column is inserted into the moving plate, the lower end of the guide column is inserted into the moving seat, and a through hole for the adjusting bolt is arranged in the middle part of the guide column, and when the adjusting plate moves left and right under the action of the adjusting bolt, the guide column can move left and right in the guide groove.

[0013] Further preferably, the fixing structure comprises a clamping nut and a limiting block, the clamping nut is sleeved on the adjusting bolt and located between the moving seat and the adjusting plate, and the limiting block is fixedly sleeved on the adjusting bolt, the limiting block is located in the guide groove and arranged right to the guide column.

[0014] The beneficial effects of the present application: when the die casting is completed, the flat push ejector pin can be pushed out upward under the action of the moving assembly, so that the top surface of the flat push ejector pin is higher than the top surface of the moving plate, when the flat push ejector pin moves upward, it can synchronously drive the gas in the exhaust cavity to move upward, push out the sheet condensed between the exhaust gaps, realize the self-cleaning of the exhaust gap, and a plurality of flat push ejector pins are arranged at intervals along the exhaust direction, which can effectively ensure the cleanliness of the exhaust gap, thereby ensuring the continuity of production and reducing the quality fluctuation of products. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a perspective view of the present application (without adjustment assembly).

[0016] Figure 2 It is a structural diagram of the present application Figure One (without adjustment assembly).

[0017] Figure 3 It is a perspective view of the moving assembly in the present application.

[0018] Figure 4 It is a perspective view of the flat push ejector pin in the present application.

[0019] Figure 5 It is a perspective view of the moving cover in the present application.

[0020] Figure 6 It is a perspective view of the displacement assembly in the present application.

[0021] Figure 7 It is a structural diagram of the present application Figure Two (with adjustment assembly). DETAILED DESCRIPTION

[0022] The present application will be further described below through examples and in conjunction with the drawings:

[0023] As Figures 1-7 shown, a self-cleaning exhaust device mainly consists of a moving plate 1, a fixed plate 2, a flat push ejector pin 3 and a moving assembly, wherein the moving plate 1 is arranged on the upper die of the mold and can move with the upper die, the fixed plate 2 is arranged on the lower die of the mold, when the upper die and the lower die are closed, an exhaust gap for overflow exhaust during die casting is left between the moving plate 1 and the fixed plate 2, wherein the structure of the upper die and the lower die is the prior art, which will not be described here.

[0024] The exhaust cavity 1a is arranged in the moving plate 1 for ensuring that the air pressure is greater than the atmospheric pressure during the die casting process, a plurality of flat push pins 3 are arranged in the exhaust cavity 1a along the exhaust direction, a strip-shaped slot 1b is arranged on the moving plate 1 for each flat push pin 3 to push out upward individually, the strip-shaped slot 1b is communicated with the exhaust cavity 1a, and a moving assembly for moving the flat push pin 3 upward and downward is arranged in the exhaust cavity 1a, when the upper die and the lower die are closed, the top surface of the flat push pin 3 is flush with the top surface of the moving plate 1, when the upper die is separated from the lower die, the flat push pin 3 is pushed out upward by the moving assembly, so that the top surface of the flat push pin 3 is higher than the top surface of the moving plate 1. Since the flat push pin is pushed out upward, the gas in the exhaust cavity is also pushed out, so that the thin sheet formed by the solidification of the aluminum liquid on the exhaust gap can be cleaned.

[0025] The specific structure of the moving assembly includes a flat push plate 4 which can move upward and downward in the exhaust cavity 1a, the flat push pin 3 is arranged on the flat push plate 4, a plurality of energy storage springs 5 are arranged between the flat push plate 4 and the bottom of the exhaust cavity 1a, when the upper die and the lower die are closed, the energy storage spring 5 is in a compressed state, when the upper die is separated from the lower die, the energy storage spring 5 releases the tension to push the flat push plate 4 upward. In order to facilitate the upward and downward movement of the flat push plate, a guide pressing rod 6 is arranged on the flat push plate 4, and a guide hole 1f communicated with the exhaust cavity 1a is arranged on the moving plate 1, the upper end of the guide pressing rod 6 is arranged in the guide hole 1f, so that the energy storage process of the energy storage spring can be realized by the fixed plate pushing the guide pressing rod when the upper die and the lower die are closed.

[0026] In order to facilitate the installation of the flat push pin and the guide pressing rod, the flat push plate 4 includes a flat push bottom plate 4a and a flat push cover plate 4b arranged above the flat push bottom plate 4a, the guide pressing rod 6 and the flat push pin 3 are pressed and assembled on the flat push bottom plate 4a through the flat push cover plate 4b. In this embodiment, the energy storage spring is a disc spring, and there are five disc springs, four of which are arranged in a rectangular distribution below the flat push plate, and the other one is arranged at the center position below the flat push plate. In order to facilitate the installation of the energy storage spring, a mounting column can also be arranged at the bottom of the exhaust cavity, and the mounting column leaves a gap for the upward and downward movement of the flat push plate.

[0027] In order to ensure that the gas in the exhaust cavity is greater than the atmospheric pressure, an electromagnetic valve 7 is arranged on the right side of the moving plate 1, the end of the electromagnetic valve 7 is communicated with the exhaust cavity 1a, and a gas pump structure for forcibly entering the external air into the exhaust cavity 1a and with a filtering assembly is arranged at the other end of the electromagnetic valve 7.

[0028] In order to facilitate the installation of the parts in the exhaust cavity, the moving plate 1 comprises a bottom plate 1c and a moving cover 1d covering the bottom plate 1c, the bottom surface of the moving cover 1d is concave upward to form an exhaust groove 1e, the exhaust cavity is formed by the exhaust groove and the bottom plate, and the strip-shaped groove 1b is arranged on the moving cover 1d and communicates with the exhaust groove 1e. In order to prevent too much aluminum liquid from overflowing, the top surface of the moving plate 1 is provided with a corrugated tooth structure 1g, the lower bottom surface of the fixed plate 2 is also provided with a concave tooth structure 2a matched with the tooth structure 1g, the exhaust gap is located between the tooth structure and the concave tooth structure, and the fixed plate is also provided with a gas hole for communicating with the exhaust gap. Preferably, the strip-shaped groove 1b is arranged at the concave part of the tooth structure 1g, and each tooth of the tooth structure and the tooth structure can be arranged in a rectangular, tooth-shaped or zigzag shape and the like.

[0029] In order to facilitate the exhaust of the gas in the exhaust cavity when the flat push ejector pin pushes upward, the left and right side surfaces of the flat push ejector pin 3 are both provided with a gas guide groove 3a, and in order to ensure the sealing of the exhaust cavity, a distance is left between the upper end of the gas guide groove 3a and the upper end of the flat push ejector pin 3, so that no gap is left between the flat push ejector pin and the strip-shaped groove during die casting.

[0030] Since the mold will be worn after long-term use, the adjusting assembly for adjusting the upward and downward movement of the moving plate 1 is arranged below the moving plate 1, in order to ensure that the exhaust gap does not change. The specific structure of the adjusting assembly comprises an adjusting plate 8 arranged below the moving plate 1, the bottom surface of the moving plate 1 and the top surface of the adjusting plate 8 are both arranged as inclined surfaces, the inclined directions of the two inclined surfaces are the same, and a displacement assembly for driving the adjusting plate 8 to move left and right is arranged at the right end of the adjusting plate 8. When the adjusting plate 8 is moved left and right through the displacement assembly, the moving plate 1 can be driven to move upward and downward, so as to realize the adjustment of the exhaust gap.

[0031] In order to facilitate the arrangement of the adjusting assembly, the moving seat 9 is arranged outside the moving plate 1, the adjusting cavity for accommodating the adjusting assembly and the moving plate 1 is arranged in the moving seat 9, and the specific structure of the moving seat comprises a moving seat bottom plate 9a and a moving seat enclosing plate 9b arranged on the moving seat. The adjusting cavity is a through groove arranged on the moving seat enclosing plate 9b and penetrating upward and downward.

[0032] The specific structure of the displacement assembly comprises an adjusting bolt 10, the adjusting bolt 10 passes through the moving seat 9 and is fixed on the adjusting plate 8 through a fixing structure, the adjusting bolt 10 is screwed with the moving plate 1, and the adjusting bolt and the adjusting plate are in clearance fit. In this embodiment, the mounting counterbore for mounting the adjusting bolt is arranged on the side surface of the moving seat, and the adjusting bolt is located in the mounting counterbore as a whole.

[0033] In order to ensure that the moving plate does not move left and right but only moves up and down when the adjusting bolt drives the adjusting plate to move left and right, a through guiding slot 8a is arranged on the adjusting plate 8, a guiding column 11 is arranged in the guiding slot 8a, the upper end of the guiding column 11 is inserted into the moving plate 1, the lower end of the guiding column 11 is inserted into the moving seat 9, and the middle part of the guiding column 11 is provided with a through hole for the adjusting bolt 10 to pass through. When the adjusting plate 8 moves left and right under the action of the adjusting bolt 10, the guiding column 11 can move left and right in the guiding slot 8a.

[0034] The specific structure of the fixing structure includes a clamping nut 12 and a limiting block 13. The clamping nut 12 is sleeved on the adjusting bolt 10 and located between the moving seat 9 and the adjusting plate 8, and the limiting block 13 is fixedly sleeved on the adjusting bolt 10 and located in the guiding slot 8a and right of the guiding column 11. In this embodiment, the clamping nut and the adjusting bolt can be integrated, and the limiting block is fixed on the adjusting bolt by a bolt.

[0035] In order to facilitate the downward movement of the moving plate, bosses are arranged outward on the left and right sides of the lower end of the moving plate, and reset springs are arranged between the bosses and the moving seat. In order to facilitate the installation of the reset spring, the adjusting cavity on the moving plate is arranged in a structure of small at the top and large at the bottom, and the boss is just abutted on the step of the adjusting cavity. Meanwhile, a counterbore extending upward for installing the upper end of the reset spring is arranged on the step.

Claims

1. A self-cleaning exhaust device, characterized in that: The mold includes a movable plate (1) that moves with the upper mold and a fixed plate (2) that is fixed on the lower mold. There is an exhaust gap between the movable plate (1) and the fixed plate (2) for overflow exhaust during die casting. The movable plate (1) is provided with an exhaust chamber (1a) to ensure that the air pressure is greater than atmospheric pressure during die casting. Multiple flat push pins (3) are spaced apart along the exhaust direction in the exhaust chamber (1a). The movable plate (1) is provided with a strip groove (1b) for each flat push pin (3) to be pushed upward individually and connected to the exhaust chamber (1a). The exhaust chamber (1a) is provided with a movable component that can drive the flat push pins (3) to move up and down. When the upper mold and the lower mold are closed, the top surface of the flat push pin (3) is flush with the top surface of the movable plate (1). When the upper mold leaves the lower mold, the flat push pin (3) is pushed upward under the action of the movable component, so that the top surface of the flat push pin (3) is higher than the top surface of the movable plate (1). Below the movable plate (1) is an adjustment component for adjusting the up and down movement of the movable plate (1). The adjustment component includes an adjustment plate (8) located below the movable plate (1). The bottom surface of the movable plate (1) and the top surface of the adjustment plate (8) are both set as inclined surfaces, and the two inclined surfaces are in the same direction. The right end of the adjustment plate (8) is provided with a displacement component for driving the adjustment plate (8) to move left and right. When the adjustment plate (8) is moved left and right by the displacement component, the movable plate (1) can be driven to move up and down, thereby realizing the adjustment of the exhaust gap.

2. The self-cleaning exhaust device according to claim 1, characterized in that: The movable plate (1) includes a base plate (1c) and a movable cover (1d) covering the base plate (1c). The bottom surface of the movable cover (1d) is recessed upward to form an exhaust groove (1e). The exhaust groove (1e) is connected to the top surface of the base plate (1c) to form an exhaust chamber (1a). The strip groove (1b) is disposed on the movable cover (1d) and communicates with the exhaust groove (1e).

3. The self-cleaning exhaust device according to claim 1, characterized in that: The moving component includes a flat push plate (4) that can move up and down within the exhaust chamber (1a). The flat push pin (3) is disposed on the flat push plate (4). Several energy storage springs (5) are disposed between the flat push plate (4) and the bottom of the exhaust chamber (1a). When the upper mold and the lower mold are closed, the energy storage springs (5) are in a compressed state. When the upper mold leaves the lower mold, the energy storage springs (5) release tension, which pushes the flat push plate (4) to move upward.

4. The self-cleaning exhaust device according to claim 3, characterized in that: The flat push plate (4) is provided with a guide pressure rod (6), and the moving plate (1) is provided with a guide hole (1f) communicating with the exhaust chamber (1a). The upper end of the guide pressure rod (6) is located in the guide hole (1f). The flat push plate (4) includes a flat push base plate (4a) and a flat push cover plate (4b) located above the flat push base plate (4a). The guide pressure rod (6) and the flat push pin (3) are both pressed onto the flat push base plate (4a) through the flat push cover plate (4b).

5. The self-cleaning exhaust device according to claim 1, characterized in that: A solenoid valve (7) is provided on the right side of the movable plate (1), and the end of the solenoid valve (7) is connected to the exhaust chamber (1a).

6. The self-cleaning exhaust device according to claim 1, characterized in that: The top surface of the movable plate (1) is provided with a corrugated tooth structure (1g), and the bottom surface of the fixed plate (2) is also provided with a concave tooth structure (2a) that cooperates with the tooth structure (1g). The strip groove (1b) is provided in the recess of the tooth structure (1g).

7. The self-cleaning exhaust device according to claim 1, characterized in that: The flat push pin (3) is provided with air guide grooves (3a) on both the left and right sides, and there is a distance between the upper end of the air guide groove (3a) and the upper end of the flat push pin (3).

8. The self-cleaning exhaust device according to claim 1, characterized in that: The movable plate (1) is provided with a movable seat (9) outside. The movable seat (9) is provided with an adjustment cavity for accommodating the adjustment component and the movable plate (1). The displacement component includes an adjustment bolt (10). The adjustment bolt (10) passes through the movable seat (9) and is fixed to the adjustment plate (8) by a fixing structure. The adjustment bolt (10) and the movable plate (1) are screwed together. The adjustment plate (8) is provided with a guide groove (8a) that runs vertically through it. A guide post (11) is provided in the guide groove (8a). The upper end of the guide post (11) is inserted into the movable plate (1), and the lower end is inserted into the movable seat (9). The middle part of the guide post (11) is provided with a through hole for the adjustment bolt (10) to pass through. When the adjustment plate (8) moves left and right under the action of the adjustment bolt (10), the guide post (11) can move left and right relative to the guide groove (8a).

9. The self-cleaning exhaust device according to claim 8, characterized in that: The fixing structure includes a clamping nut (12) and a limiting block (13). The clamping nut (12) is sleeved on the adjusting bolt (10) and located between the moving seat (9) and the adjusting plate (8). The limiting block (13) is fixedly sleeved on the adjusting bolt (10). The limiting block (13) is located in the guide groove (8a) and is provided on the right side of the guide post (11).

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