Die for casting sand core of turbine shell of turbocharger

Abstract

The invention provides a mold for casting a sand core of a turbine shell of a turbocharger, and relates to the technical field of production and manufacturing of turbochargers. The mold for casting the sand core of the turbine shell of the turbocharger comprises a mold body, the outer wall of the mold body is connected with an upper mold in a sliding mode, the outer wall of the mold body is detachably connected with a lower mold set, the outer wall of the lower mold set is fixedly connected with a spring, and one end of the spring is fixedly connected with a lower mold cavity. In order to improve the multifunctional conversion utilization performance of mechanical energy generated by reciprocating lifting of the upper mold and achieve the effect of synchronously blowing, cooling and cleaning the surface of a product in the lower mold, when the upper mold reciprocates and lifts, a piston block is driven to do reciprocating extrusion motion in an air cylinder through connection of a telescopic rod; and extruded gas is conveyed into the spraying pipe through connection of the connecting pipe, and dust in the lower die cavity and products placed in the lower die cavity are synchronously blown, cleaned and cooled.

Description

Technical Field

[0001] This invention relates to the field of turbocharger manufacturing technology, and in particular to a mold for casting turbocharger turbine housing sand cores. Background Technology

[0002] Sand cores are mainly used in turbine housing casting to form the internal flow channel structure of the casting. In the production of large turbine housing castings, in order to increase the strength of the sand core, a skeleton composed of steel bars or cast iron is usually placed inside the sand core during core making. This skeleton is called the "core skeleton". Therefore, in turbine housing casting, it is necessary to use molds for production.

[0003] While existing turbocharger turbine housing sand core manufacturing molds can effectively manufacture products within the mold, they suffer from several drawbacks. Firstly, when the upper mold separates from the lower mold, the simultaneous cleaning and cooling of the lower mold's surface is ineffective. Secondly, when the lower mold is needed, the pre-cleaning of adsorbed dust inside is inefficient, reducing the versatility of the upper mold's mechanical energy generation during reciprocating motion. Furthermore, after filling the lower mold cavity with sand, the high-frequency micro-vibration of the sand is ineffective, reducing the sand's density within the lower mold and impacting the quality of the turbocharger turbine housing's molding process. Summary of the Invention

[0004] This invention provides a mold for casting turbine housing sand cores for turbochargers, addressing the issues raised in the background art such as: when the upper mold detaches from the lower mold, the simultaneous blowing and cleaning and cooling effects on the surface of the lower mold product are not high; when the lower mold needs to be used, the pre-blowing and cleaning effect on the dust adsorbed inside the lower mold is not high; the multifunctionality of the upper mold's reciprocating lifting and lowering operation is reduced; and the effect on the high-frequency micro-vibration of the sand material is not high, reducing the density of the sand material laid in the lower mold.

[0005] This invention provides a mold for casting a turbine housing sand core for a turbocharger, comprising a mold body, an upper mold slidably connected to the outer wall of the mold body, a lower mold assembly detachably connected to the outer wall of the mold body, a spring fixedly connected to the outer wall of the lower mold assembly, and a lower mold cavity fixedly connected to one end of the spring. An air cylinder is fixedly connected to the outer wall of the mold body, and a telescopic rod that is slidably connected to the outer wall of the air cylinder is fixedly connected to the outer wall of the upper mold. A piston block that is slidably connected to the inner wall of the air cylinder is fixedly connected to one end of the telescopic rod. A connecting pipe is fixedly connected to one end of the air cylinder, and a spray pipe is fixedly connected to the outer wall of the connecting pipe. A heat recovery pipe is fixedly connected to the outer wall of the lower mold cavity. One end of the heat recovery pipe is fixedly connected to an insulation box. A diversion pipe is fixedly connected to the outer wall of the insulation box and is detachably connected to the outer wall of the connecting pipe. A reciprocating vibrating screen mechanism is provided on the outer wall of the mold body. In order to improve the multi-functional conversion and utilization of the mechanical energy generated by the reciprocating lifting of the upper mold, and to improve the effect of synchronous blowing, cooling and cleaning of the product surface in the lower mold, when the upper mold reciprocates, the piston block is driven to reciprocate and squeeze along the air cylinder through the connection of the telescopic rod. The squeezed gas is then transported to the nozzle through the connection of the connecting pipe, and the dust in the lower mold cavity and the product placed in the lower mold cavity are synchronously blown, cleaned and cooled.

[0006] Preferably, four sets of springs are provided, and the positions of the four sets of springs are distributed around the lower mold cavity. The air cylinder and the nozzle are interconnected, and the nozzle is distributed in a straight line on the outer wall of the air cylinder.

[0007] Preferably, a heating rod is provided inside the lower mold assembly, and the interior of the lower mold assembly is interconnected with the heat recovery pipe. The spray pipe is inclined, and the lower mold cavity is located on the spray trajectory of the spray pipe.

[0008] Preferably, the diversion pipe and the air cylinder are detachably connected by bolts, and the outer wall of the heat recovery pipe is provided with a pump.

[0009] Preferably, the reciprocating vibrating screen mechanism includes a threaded slider, a swing rod, and a vibrating disc. A servo motor is provided on the outer wall of the mold body. The output end of the servo motor is fixedly connected to a threaded rod that is rotatably connected to the outer wall of the mold body. The outer wall of the threaded rod is threadedly connected to a threaded slider that is slidably connected to the outer wall of the mold body. The outer wall of the threaded slider is slidably connected to a swing rod that is rotatably connected to the outer wall of the mold body. The rotation center of the swing rod is fixedly connected to a vibrating disc that fits against the bottom of the lower mold cavity via a rotating shaft. In order to improve the laying density of the sand after it is placed in the lower mold cavity and improve the quality of the turbocharger turbine housing produced in the mold, the servo motor is turned on, and the rotation of the threaded rod drives the threaded slider to slide along the outer wall of the mold and along the inner wall of the adjusting groove. The sliding of the threaded slider drives the vibrating disc to reciprocate through the rotation of the swing rod. At the same time, under the connection of the spring, the lower mold cavity vibrates synchronously with the vibrating disc, improving the uniformity of the sand after it is placed in the lower mold.

[0010] Preferably, the outer wall of the swing rod is provided with an adjustment groove at the connection between it and the threaded slider, and the outer wall of the vibrating plate has a square-shaped outline.

[0011] Preferably, a fixed cylinder is fixedly connected to the outer wall of the mold body, and a blower fan rotatably connected to the inner wall of the fixed cylinder is fixedly connected to one end of the threaded rod. A filter screen located on one side of the blower fan is provided on the inner wall of the fixed cylinder. A first air blowing pipe is fixedly connected to the outer wall of the fixed cylinder, and a second air blowing pipe located on one side of the first air blowing pipe is fixedly connected to the outer wall of the fixed cylinder. When the vibratory plate adjusts the density of the sand material, in order to improve the effect of synchronously blowing and cleaning impurities overflowing from the mold surface, the rotation of the threaded rod drives the blower fan to rotate synchronously. The gas generated by the blower fan is blown to the surface of the mold through the first and second air blowing pipes, thereby improving the surface cleanliness of the mold during long-term use.

[0012] Preferably, the outer wall of the upper mold is slidably connected to a pull rod that is rotatably connected to the outer wall of the mold body. The outer wall of the pull rod is slidably connected to a protective cover that is slidably connected to the outer wall of the mold body. The outer wall of the protective cover is fixedly connected to a limiting rod that is slidably connected to the outer wall of the mold body. In order to improve the shielding and protection effect of the lower mold cavity when it is not in use, and to prevent dust adsorption from affecting the surface forming quality of the thick turbine housing, when the upper mold rises, it will drive the upper mold to slide along the inner wall of the first limiting groove, and drive the pull rod to rotate. The rotation of the pull rod, through the connection of the limiting rod, drives the protective cover to move synchronously along the second limiting groove and the outer wall of the mold body, so that the two sets of protective covers slide in a centered manner, achieving the effect of synchronous shielding and protection of the lower mold cavity when it is not in use.

[0013] Preferably, the protective cover is provided in two sets, and the positions of the two sets of protective covers are symmetrical about the central axis of the lower mold cavity, and the outer wall contour of the protective cover is U-shaped.

[0014] Preferably, a first limiting groove is provided at the connection between the outer wall of the swing rod and the upper mold, and a second limiting groove is provided at the connection between the outer wall of the swing rod and the protective cover; The positions of the first limiting groove and the second limiting groove are equidistant from the rotation center of the swing rod. Beneficial effects

[0015] While existing turbocharger turbine housing sand core manufacturing molds can effectively manufacture products within the mold, they suffer from several drawbacks. Firstly, when the upper mold separates from the lower mold, the simultaneous blowing and cleaning of the lower mold's surface and its cooling effect are limited. Secondly, when the lower mold is needed, the pre-blowing and cleaning of adsorbed dust inside is ineffective, reducing the versatility of the upper mold's reciprocating lifting motion and the resulting mechanical energy. Furthermore, after filling the lower mold cavity with sand, the high-frequency micro-vibration effect on the sand is poor, reducing the sand's density within the lower mold and impacting the quality of the turbocharger turbine housing's molding within the mold.

[0016] In order to improve the multi-functional conversion and utilization of the mechanical energy generated by the reciprocating lifting and lowering of the upper mold, and to improve the effect of synchronous blowing, cooling and cleaning of the product surface in the lower mold, the piston block is driven to reciprocate and squeeze along the air cylinder through the connection of the telescopic rod when the upper mold is reciprocating and lowering. The squeezed gas is then transported to the nozzle through the connection of the connecting pipe, and performs synchronous blowing, cleaning and cooling of the dust in the lower mold cavity and the product placed in the lower mold cavity.

[0017] In use, to improve the density of the sand material after it is placed in the lower mold cavity and to improve the quality of the turbocharger turbine housing produced in the mold, the servo motor is turned on. Through the rotation of the threaded rod, the threaded slider is driven to slide along the outer wall of the mold and along the inner wall of the adjustment groove. The sliding of the threaded slider drives the vibratory plate to reciprocate through the rotation of the swing rod. At the same time, under the connection of the spring, the lower mold cavity vibrates synchronously with the vibratory plate, thereby improving the uniformity of the sand material after it is placed in the lower mold.

[0018] In order to improve the shielding and protection effect of the lower mold cavity when it is not in use and to prevent dust from affecting the surface forming quality of the thick turbine housing, when the upper mold rises, it will drive the upper mold to slide along the inner wall of the first limiting groove and drive the pulling rod to rotate. The rotation of the pulling rod, through the connection of the limiting rod, drives the protective cover to move synchronously along the second limiting groove and the outer wall of the mold body, so that the two sets of protective covers slide in a centered manner, achieving the effect of synchronous shielding and protection of the lower mold cavity when it is not in use.

[0019] When the present invention is in use, in order to improve the effect of synchronously blowing and cleaning impurities overflowing from the mold surface, the rotation of the threaded rod drives the blower to rotate synchronously. The gas generated by the blower is blown to the surface of the mold through the first and second blower pipes, thereby improving the surface cleanliness of the mold during long-term use.

[0020] The above description is merely an overview of the technical solutions of the embodiments of the present invention. In order to better understand the technical means of the embodiments of the present invention and to implement them in accordance with the contents of the specification, and to make the above and other objects, features and advantages of the embodiments of the present invention more apparent and understandable, specific embodiments of the present invention are described below. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the overall structure of a mold for casting a turbine housing sand core for a turbocharger according to the present invention.

[0023] Figure 2 This is a schematic diagram of the overall structure of a mold for casting a turbine housing sand core for a turbocharger according to the present invention from another perspective.

[0024] Figure 3 This is a schematic diagram of the pull rod position distribution structure of a mold for casting a turbocharger turbine housing sand core according to the present invention.

[0025] Figure 4 This is a schematic diagram of the connection structure between the vibratory plate and the lower mold cavity of a mold for casting a turbine housing sand core for a turbocharger according to the present invention.

[0026] Figure 5 This is a schematic diagram of the cylinder position distribution structure of a mold for casting a turbocharger turbine housing sand core according to the present invention.

[0027] Figure 6 This is a schematic diagram of the connection structure between the protective cover and the limiting rod of a mold for casting a turbine housing sand core for a turbocharger according to the present invention.

[0028] Figure 7 This is a schematic diagram of the piston block position distribution structure of a mold for casting a turbocharger turbine housing sand core according to the present invention.

[0029] Figure 8 This is a schematic diagram of the spring position distribution structure of a mold for casting a turbocharger turbine housing sand core according to the present invention.

[0030] Figure 9 This is a schematic cross-sectional view of the internal structure of the fixing cylinder of the mold for casting the turbine housing sand core of a turbocharger according to the present invention.

[0031] Figure 10 This is a schematic diagram of the connection structure between the threaded slider and the swing rod of a mold for casting a turbine housing sand core for a turbocharger according to the present invention.

[0032] Explanation of reference numerals in the attached figures: 1. Mold body; 2. Upper mold; 3. Lower mold assembly; 4. Spring; 5. Lower mold cavity; 6. Air cylinder; 7. Telescopic rod; 8. Piston block; 9. Connecting pipe; 10. Spray pipe; 11. Heat recovery pipe; 12. Insulation box; 13. Diverter pipe; 14. Servo motor; 15. Threaded rod; 16. Threaded slider; 17. Swing rod; 18. Adjustment groove; 19. Vibrating plate; 20. Fixed cylinder; 21. Blowing fan; 22. Filter screen; 23. First blowing pipe; 24. Second blowing pipe; 25. Pulling rod; 26. First limiting groove; 27. Protective cover; 28. Second limiting groove; 29. ​​Limiting rod. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains; the terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to limit the invention; the terms “comprising” and “having”, and any variations thereof, in the description, claims and drawings of this invention are intended to cover non-exclusive inclusion.

[0035] The term "embodiment" as used herein means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the invention. The appearance of the phrase "embodiment" in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0036] The directional terms appearing in the following description refer to the directions shown in the figures and are not intended to limit the specific structure of the present invention. For example, in the description of the present invention, terms such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the figures. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the present invention.

[0037] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, "connection" or "joining" of a mechanical structure can refer to a physical connection. A physical connection can be a fixed connection, such as a connection secured by fasteners, such as screws, bolts, or other fasteners; a physical connection can also be a detachable connection, such as a snap-fit ​​or interlocking connection; a physical connection can also be an integral connection, such as a connection formed by welding, bonding, or integral molding. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0038] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0039] This invention provides, for example Figure 1-10 The mold shown is for casting a turbocharger turbine housing sand core, including a mold body 1, an upper mold 2 slidably connected to the outer wall of the mold body 1, a lower mold assembly 3 detachably connected to the outer wall of the mold body 1, a spring 4 fixedly connected to the outer wall of the lower mold assembly 3, and a lower mold cavity 5 fixedly connected to one end of the spring 4. An air cylinder 6 is fixedly connected to the outer wall of the mold body 1. A telescopic rod 7 that is slidably connected to the outer wall of the air cylinder 6 is fixedly connected to the outer wall of the upper mold 2. A piston block 8 that is slidably connected to the inner wall of the air cylinder 6 is fixedly connected to one end of the telescopic rod 7. A connecting pipe 9 is fixedly connected to one end of the air cylinder 6. A spray pipe 10 is fixedly connected to the outer wall of the connecting pipe 9. A heat recovery pipe 11 is fixedly connected to the outer wall of the lower mold cavity 5. A heat preservation box 12 is fixedly connected to one end of the heat recovery pipe 11. A diversion pipe 13, which is detachably connected to the outer wall of the connecting pipe 9, is fixedly connected to the outer wall of the heat preservation box 12. A reciprocating vibrating screen mechanism is provided on the outer wall of the mold body 1.

[0040] The spring 4 is provided in four sets, and the positions of the four sets of spring 4 are distributed around the lower mold cavity 5. The air cylinder 6 and the nozzle 10 are interconnected, and the nozzle 10 is distributed in a straight line on the outer wall of the air cylinder 6.

[0041] This allows the lower mold cavity 5 to vibrate synchronously with the vibrating plate 19 by setting four sets of springs 4 evenly distributed around the lower mold cavity 5.

[0042] The lower mold assembly 3 is equipped with a heating rod inside, and the interior of the lower mold assembly 3 is connected to the heat recovery pipe 11. The nozzle 10 is set at an angle, and the lower mold cavity 5 is set on the spray trajectory of the nozzle 10.

[0043] The arrangement facilitates the convenient recovery and utilization of heat generated by the heating rod through the interconnection between the interior of the lower mold assembly 3 and the heat recovery pipe 11.

[0044] The diversion pipe 13 and the air cylinder 6 are detachably connected by bolts, and the outer wall of the heat recovery pipe 11 is equipped with a pump.

[0045] This facilitates a detachable connection between the diverter pipe 13 and the air cylinder 6 via bolts, enabling the gas to be supplied to the nozzle 10 through multiple pathways.

[0046] The reciprocating vibrating screen mechanism includes a threaded slider 16, a swing rod 17, and a vibrating plate 19. A servo motor 14 is installed on the outer wall of the mold body 1. The output end of the servo motor 14 is fixedly connected to a threaded rod 15 that is rotatably connected to the outer wall of the mold body 1. The outer wall of the threaded rod 15 is threadedly connected to a threaded slider 16 that is slidably connected to the outer wall of the mold body 1. The outer wall of the threaded slider 16 is slidably connected to a swing rod 17 that is rotatably connected to the outer wall of the mold body 1. The rotation center of the swing rod 17 is fixedly connected to a vibrating plate 19 that fits against the bottom of the lower mold cavity 5 via a rotating shaft. To improve the density of the sand material after it is placed in the lower mold cavity 5 and to improve the quality of the turbocharger turbine housing produced in the mold, the servo motor 14 is turned on. Through the rotation of the threaded rod 15, the threaded slider 16 is driven to slide along the outer wall of the mold and along the inner wall of the adjusting groove 18. The sliding of the threaded slider 16 drives the vibratory plate 19 to reciprocate through the rotation of the swing rod 17. At the same time, under the connection of the spring 4, the lower mold cavity 5 vibrates synchronously with the vibratory plate 19, thereby improving the uniformity of the sand material after it is placed in the lower mold.

[0047] The setting of the vibratory plate 19 is beneficial to make the lower mold cavity 5 vibrate synchronously with the vibratory plate 19, thereby improving the uniformity of the sand material after it is placed in the lower mold.

[0048] The outer wall of the swing rod 17 is provided with an adjustment groove 18 at the connection between it and the threaded slider 16, and the outer wall of the vibrating plate 19 has a square-shaped outline.

[0049] The adjustment groove 18 is provided at the connection between the outer wall of the swing rod 17 and the threaded slider 16, so as to achieve the effect of driving the threaded slider 16 to slide and limit its use.

[0050] The mold body 1 has a fixed cylinder 20 fixedly connected to its outer wall. One end of the threaded rod 15 is fixedly connected to a blower 21 that is rotatably connected to the inner wall of the fixed cylinder 20. The inner wall of the fixed cylinder 20 is provided with a filter screen 22 located on one side of the blower 21. The outer wall of the fixed cylinder 20 is fixedly connected to a first air pipe 23. The outer wall of the fixed cylinder 20 is fixedly connected to a second air pipe 24 located on one side of the first air pipe 23. When the vibrating plate 19 adjusts the density of the sand material, in order to improve the effect of synchronously blowing and cleaning the impurities overflowing from the mold surface, the rotation of the threaded rod 15 drives the blower 21 to rotate synchronously. The gas generated by the blower 21 is blown to the surface of the mold through the first air pipe 23 and the second air pipe 24, thereby improving the surface cleanliness of the mold during long-term use.

[0051] The arrangement of the first air pipe 23 and the second air pipe 24 helps to improve the surface cleanliness of the mold during long-term use.

[0052] The upper mold 2 has a sliding connection to a pull rod 25 that is rotatably connected to the outer wall of the mold body 1. The outer wall of the pull rod 25 is slidably connected to a protective cover 27 that is slidably connected to the outer wall of the mold body 1. The outer wall of the protective cover 27 is fixedly connected to a limiting rod 29 that is slidably connected to the outer wall of the mold body 1. In order to improve the shielding and protection effect of the lower mold cavity 5 when it is not in use, and to prevent dust adsorption from affecting the surface forming quality of the thick turbine housing, when the upper mold 2 rises, it will drive the upper mold 2 to slide along the inner wall of the first limiting groove 26, and drive the pull rod 25 to rotate. The rotation of the pull rod 25, through the connection of the limiting rod 29, drives the protective cover 27 to move synchronously along the second limiting groove 28 and the outer wall of the mold body 1, so that the two sets of protective covers 27 slide in the center, achieving the effect of synchronous shielding and protection of the lower mold cavity 5 when it is not in use.

[0053] It facilitates centering and sliding through the protective cover 27, achieving the effect of simultaneously shielding and protecting the lower mold cavity 5 when not in use.

[0054] The protective cover 27 is provided in two sets, and the positions of the two sets of protective covers 27 are symmetrical about the central axis of the lower mold cavity 5. The outer wall contour of the protective cover 27 is U-shaped.

[0055] It is advantageous to set up two sets of protective covers 27 with their positions symmetrical about the central axis of the lower mold cavity 5, so that the lower mold cavity 5 can be simultaneously shielded and protected when not in use.

[0056] The outer wall of the swing rod 17 is provided with a first limiting groove 26 at the connection between the outer wall of the swing rod 17 and the upper mold 2, and the outer wall of the swing rod 17 is provided with a second limiting groove 28 at the connection between the outer wall of the swing rod 17 and the protective cover 27. The positions of the first limiting groove 26 and the second limiting groove 28 are equidistant from the rotation center of the swing rod 17.

[0057] The setting of the first limiting groove 26 and the second limiting groove 28 is conducive to achieving the effect of driving the relative movement between the upper mold 2 and the protective cover 27.

[0058] Working principle: When this metal casting melting device is in use, firstly, in order to improve the multi-functional conversion and utilization of the mechanical energy generated by the reciprocating lifting of the upper mold 2, and to improve the effect of synchronous blowing, cooling and cleaning of the product surface in the lower mold, when the upper mold 2 reciprocates, the piston block 8 is driven to reciprocate and squeeze along the air cylinder 6 through the connection of the telescopic rod 7, so that the squeezed gas is transported to the nozzle 10 through the connection of the connecting pipe 9, and synchronously blows, cleans and cools the dust in the lower mold cavity 5 and the product placed in the lower mold cavity 5.

[0059] Next, in order to improve the laying density of the sand material after it is placed in the lower mold cavity 5 and improve the production quality of the turbocharger turbine housing in the mold, the servo motor 14 is turned on and the threaded rod 15 rotates to drive the threaded slider 16 to slide along the outer wall of the mold and along the inner wall of the adjustment groove 18. The sliding of the threaded slider 16 drives the vibratory plate 19 to reciprocate through the rotation of the swing rod 17. At the same time, under the connection of the spring 4, the lower mold cavity 5 vibrates synchronously with the vibratory plate 19, thereby improving the uniformity of the sand material after it is placed in the lower mold.

[0060] Next, when the vibratory plate 19 is adjusting the density of the sand material, in order to improve the effect of synchronously blowing and cleaning the impurities overflowing from the mold surface, the rotation of the threaded rod 15 drives the blower 21 to rotate synchronously. The gas generated by the blower 21 is blown to the surface of the mold through the first blower pipe 23 and the second blower pipe 24, thereby improving the surface cleanliness of the mold during long-term use. Finally, in order to improve the shielding and protection effect of the lower mold cavity 5 when it is not in use, and to prevent dust adsorption from affecting the surface forming quality of the thick turbine housing, when the upper mold 2 rises, it will drive the upper mold 2 to slide along the inner wall of the first limiting groove 26, and drive the pulling rod 25 to rotate. The rotation of the pulling rod 25, through the connection of the limiting rod 29, drives the protective cover 27 to move synchronously along the second limiting groove 28 and the outer wall of the mold body 1, so that the two sets of protective covers 27 slide in the center, achieving the effect of synchronous shielding and protection of the lower mold cavity 5 when it is not in use.

[0061] The above-described embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A mold for casting a turbocharger turbine housing sand core, comprising a mold body (1), characterized in that: The outer wall of the mold body (1) is slidably connected to the upper mold (2), the outer wall of the mold body (1) is detachably connected to the lower mold assembly (3), the outer wall of the lower mold assembly (3) is fixedly connected to the spring (4), and one end of the spring (4) is fixedly connected to the lower mold cavity (5). An air cylinder (6) is fixedly connected to the outer wall of the mold body (1), and a telescopic rod (7) that is slidably connected to the outer wall of the air cylinder (6) is fixedly connected to the outer wall of the upper mold (2). A piston block (8) that is slidably connected to the inner wall of the air cylinder (6) is fixedly connected to one end of the telescopic rod (7), and a connecting pipe (9) is fixedly connected to one end of the air cylinder (6). A nozzle (10) is fixedly connected to the outer wall of the connecting pipe (9). A heat recovery pipe (11) is fixedly connected to the outer wall of the lower mold cavity (5). A heat preservation box (12) is fixedly connected to one end of the heat recovery pipe (11). A diversion pipe (13) is fixedly connected to the outer wall of the heat preservation box (12) and is detachably connected to the outer wall of the connecting pipe (9). A reciprocating vibrating screen mechanism is provided on the outer wall of the mold body (1).

2. The mold for casting a turbocharger turbine housing sand core according to claim 1, characterized in that: The spring (4) is provided in four sets, and the positions of the four sets of spring (4) are distributed around the lower mold cavity (5). The air cylinder (6) and the nozzle (10) are interconnected, and the nozzle (10) is distributed in a straight line on the outer wall of the air cylinder (6).

3. The mold for casting a turbocharger turbine housing sand core according to claim 1, characterized in that: The lower mold assembly (3) is equipped with a heating rod inside. The interior of the lower mold assembly (3) is connected to the heat recovery pipe (11). The spray pipe (10) is inclined, and the lower mold cavity (5) is located on the spray trajectory of the spray pipe (10).

4. The mold for casting a turbocharger turbine housing sand core according to claim 1, characterized in that: The diversion pipe (13) and the air cylinder (6) are detachably connected by bolts, and the outer wall of the heat recovery pipe (11) is provided with a pump.

5. The mold for casting a turbocharger turbine housing sand core according to claim 1, characterized in that: The reciprocating vibrating screen mechanism includes a threaded slider (16), a swing rod (17), and a vibrating plate (19). A servo motor (14) is provided on the outer wall of the mold body (1). The output end of the servo motor (14) is fixedly connected to a threaded rod (15) that is rotatably connected to the outer wall of the mold body (1). The outer wall of the threaded rod (15) is threadedly connected to a threaded slider (16) that is slidably connected to the outer wall of the mold body (1). The outer wall of the threaded slider (16) is slidably connected to a swing rod (17) that is rotatably connected to the outer wall of the mold body (1). The rotation center of the swing rod (17) is fixedly connected to a vibrating plate (19) that is in contact with the bottom of the lower mold cavity (5) through a rotating shaft.

6. The mold for casting a turbocharger turbine housing sand core according to claim 5, characterized in that: An adjustment groove (18) is provided at the connection between the outer wall of the swing rod (17) and the threaded slider (16), and the outer wall of the vibrating plate (19) has a square-shaped outline.

7. The mold for casting a turbocharger turbine housing sand core according to claim 5, characterized in that: The outer wall of the mold body (1) is fixedly connected to a fixed cylinder (20), one end of the threaded rod (15) is fixedly connected to a blower (21) that is rotatably connected to the inner wall of the fixed cylinder (20), the inner wall of the fixed cylinder (20) is provided with a filter screen (22) located on one side of the blower (21), the outer wall of the fixed cylinder (20) is fixedly connected to a first air blowing pipe (23), and the outer wall of the fixed cylinder (20) is fixedly connected to a second air blowing pipe (24) located on one side of the first air blowing pipe (23).

8. The mold for casting a turbocharger turbine housing sand core according to claim 1, characterized in that: The outer wall of the upper mold (2) is slidably connected to a pull rod (25) that is rotatably connected to the outer wall of the mold body (1). The outer wall of the pull rod (25) is slidably connected to a protective cover (27) that is slidably connected to the outer wall of the mold body (1). The outer wall of the protective cover (27) is fixedly connected to a limiting rod (29) that is slidably connected to the outer wall of the mold body (1).

9. A mold for casting a turbocharger turbine housing sand core according to claim 8, characterized in that: The protective cover (27) is provided in two sets. The positions of the two sets of protective covers (27) are symmetrical about the central axis of the lower mold cavity (5). The outer wall contour of the protective cover (27) is U-shaped.

10. A mold for casting a turbocharger turbine housing sand core according to claim 5, characterized in that: The outer wall of the swing rod (17) is provided with a first limiting groove (26) at the connection between the upper mold (2) and the outer wall of the swing rod (17) is provided with a second limiting groove (28) at the connection between the outer wall of the swing rod (17) and the protective cover (27). The positions of the first limiting groove (26) and the second limiting groove (28) are equidistant from the rotation center of the swing rod (17).

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