Air blowing device for foundry sand

Abstract

The utility model relates to the technical field of casting equipment, and specifically to a blowing device for casting sand; it comprises a frame, a workbench is fixed on the frame, a blowing mechanism is connected to the workbench, a gas storage tank is also arranged on one side of the frame, a pressure gauge, an air inlet pipe, an air outlet pipe and an exhaust pipe are arranged on the gas storage tank, an air pump is also connected between the air outlet pipe and the blowing mechanism, the air pump is installed on the workbench, and comprises a cylinder, a booster valve, an air inlet and an air outlet, wherein the air inlet is connected to the air outlet pipe, and the air outlet is connected to the blowing mechanism. The blowing device for casting sand provided by the utility model protects the molten metal and the surface of the casting, improves the quality and surface finish of the casting, controls the temperature of the casting, removes oxides and impurities on the surface of the casting, etc. by injecting industrial gas into the pores, and can also exhaust the air in the casting sand, and the operation is simple.

Description

Technical Field

[0001] The utility model relates to the technical field of casting equipment, in particular to an air blowing device for casting molding sand. Background Art

[0002] Foundry sand, also known as sand casting, refers to the casting method of producing castings in sand molds. Steel, iron and most non-ferrous alloy castings can be obtained by sand casting. Since the molding materials used in sand casting are cheap and easy to obtain, the mold is simple to manufacture, and it can adapt to the single-piece production, batch production and mass production of castings, it has long been the basic process in casting production. The basic raw materials are casting sand and sand binder. The most commonly used casting sand is siliceous sand. When the high-temperature performance of silica sand cannot meet the use requirements, special sands such as zircon sand, chromite sand, and corundum sand are used. In order to make the manufactured sand mold and core have a certain strength and not deform or damage during transportation, mold assembly and pouring of liquid metal, generally, a sand binder is added to the casting to bond the loose sand particles together to form molding sand. The most widely used sand binder is clay, and various drying oils or semi-drying oils, water-soluble silicates or phosphates and various synthetic resins can also be used as sand binders. The outer sand mold used in sand casting is divided into three types: clay wet sand mold, clay dry sand mold and chemical hardening sand mold according to the different binders used in the molding sand and the way it builds strength. During the casting production process, if the gas in the molding sand or the mold cavity cannot be discharged smoothly, its pressure reaches a certain level, it will invade the molten metal and form pores in the casting. This type of pore is an invasive pore. These pores will destroy the continuity of the metal, reduce the effective bearing area, cause stress concentration, reduce mechanical properties, and reduce air tightness. Existing solutions usually include three points: ensuring the necessary air permeability of the molding sand, enhancing the exhaust capacity of the sand mold and paying attention to the exhaust measures of the sand core; these solutions have high construction requirements and can only reduce the generation of pores to a certain extent. Utility Model Content

[0003] The utility model aims to provide an air blowing device for foundry sand, which can protect molten metal and the surface of castings, improve the quality and surface finish of castings, control the temperature of castings, remove oxides and impurities on the surface of castings, etc. by injecting industrial gas into air holes, and can also exhaust the air in the sand, and the operation is simple.

[0004] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a blowing device for casting sand, comprising a frame, a workbench fixed on the frame, a blowing mechanism connected to the workbench, an air storage tank is also arranged on one side of the frame, a pressure gauge, an air inlet pipe, an air outlet pipe and an exhaust pipe are arranged on the air storage tank, an air pump is also connected between the air outlet pipe and the blowing mechanism, the air pump is installed on the workbench, comprises a cylinder, a booster valve, an air inlet and an air outlet, wherein the air inlet is connected to the air outlet pipe, and the air outlet is connected to the blowing mechanism.

[0005] Furthermore, the blowing mechanism includes a transverse moving mechanism, a longitudinal moving mechanism, a rotary clamping mechanism, an air blowing pipe and an air blowing nozzle, wherein the transverse moving mechanism is fixed on the workbench, and the longitudinal moving mechanism is connected to the top thereof, the rotary clamping mechanism is installed on the longitudinal clamping mechanism, the air blowing pipe is installed on the rotary clamping mechanism, and the lower end of the air blowing pipe is connected to the air outlet nozzle, wherein the transverse moving mechanism drives the longitudinal moving mechanism to move horizontally, the longitudinal moving mechanism drives the rotary clamping mechanism to move up and down, and the rotary clamping mechanism drives the air blowing pipe to rotate.

[0006] Furthermore, the frame includes an adjusting foot, a cross bar, a vertical bar and a reinforcing bar. The adjusting foot is threadedly connected to the center of the bottom of the vertical bar, the cross bar is horizontally connected to the upper and lower ends of the vertical bar, and the middle of the vertical bar is also connected to a reinforcing bar.

[0007] Furthermore, the lateral movement mechanism includes a driving motor, a shell and a slider. The driving motor is installed at one end of the shell and is electrically connected to an external power supply. The slider is slidably connected to the shell and is driven by the driving motor to move horizontally.

[0008] Furthermore, the longitudinal movement mechanism includes a driving motor, a shell and a slider. The driving motor is installed at one end of the shell and is electrically connected to an external power supply. The slider is slidably connected to the shell and is driven by the driving motor to move up and down.

[0009] Furthermore, the rotating clamping mechanism includes a connecting plate, a rotating table and a clamping claw. The connecting plate is installed on the longitudinal moving mechanism. The rotating table is rotatably connected to the connecting plate. The clamping claws are a pair, slidingly connected to the rotating table, and adjusted and positioned by bolts. The clamping claws can adjust the opening size to facilitate clamping the blowing pipe. The rotating table will drive the blowing pipe to rotate and be positioned by bolts.

[0010] Furthermore, a group of legs are provided at the bottom of the gas storage tank, and the gas storage tank support is isolated from the ground through the legs, so that the exhaust pipe at the bottom can be used to exhaust the internal industrial gas for processing.

[0011] The beneficial effects of the utility model are: 1) the utility model stores industrial gases such as commonly used carbon dioxide gas through a gas storage tank, and then draws the gas therein into the blowing mechanism through a vacuum pump, and finally injects it into the sand box from the blowing nozzle. When in use, the blowing pipe can adjust the inclination angle under the action of the rotating clamping mechanism, the height of the blowing nozzle can be adjusted under the movement of the longitudinal moving mechanism, and the horizontal position can be adjusted under the movement of the transverse moving mechanism. It is convenient for blowing sand molds of different sizes and positions. No matter where the sand mold airway is designed, it can be quickly aligned for blowing, and the adjustment is simple and easy to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1It is a three-dimensional structural schematic diagram of the utility model.

[0013] Figure 2 It is the front view of the utility model.

[0014] Figure 3 It is a top view of the utility model.

[0015] In the figure: 1. frame; 2. workbench; 3. blowing mechanism; 4. gas storage tank; 5. pressure gauge; 6. air inlet pipe; 7. air outlet pipe; 8. exhaust pipe; 9. vacuum pump; 10. cylinder; 11. boost valve; 12. air inlet; 13. air outlet; 14. lateral moving mechanism; 15. longitudinal moving mechanism; 16. rotating clamping mechanism; 17. blowing pipe; 18. blowing nozzle; 19. adjusting foot; 20. cross bar; 21. vertical bar; 22. reinforcing rod; 23. driving motor; 24. housing; 25. slider; 26. connecting plate; 27. rotating table; 28. clamping claw; 29. ​​supporting leg. DETAILED DESCRIPTION

[0016] The present invention will be further explained below in conjunction with the accompanying drawings and specific embodiments.

[0017] Embodiment: As shown in the figure, the blowing device for casting sand described in the utility model comprises

[0018] A frame 1, a workbench 2 is fixed on the frame 1, a blowing mechanism 3 is connected to the workbench 2, an air storage tank 4 is also arranged on one side of the frame 1, a pressure gauge 5, an air inlet pipe 6, an air outlet pipe 7 and an exhaust pipe 8 are arranged on the air storage tank 4, an air pump 9 is also connected between the air outlet pipe 7 and the blowing mechanism 3, the air pump 9 is installed on the workbench 2, and includes a cylinder 10, a booster valve 11, an air inlet 12 and an air outlet 13, wherein the air inlet 12 is connected to the air outlet pipe 7, and the air outlet 13 is connected to the blowing mechanism 3.

[0019] The blowing mechanism 3 includes a transverse moving mechanism 14, a longitudinal moving mechanism 15, a rotary clamping mechanism 16, an air blowing pipe 17 and an air blowing nozzle 18, wherein the transverse moving mechanism 14 is fixed on the workbench 2, and the longitudinal moving mechanism 15 is connected to the top thereof, the rotary clamping mechanism 16 is installed on the longitudinal clamping mechanism, the air blowing pipe 17 is installed on the rotary clamping mechanism 16, and the lower end of the air blowing pipe 17 is connected to the air outlet nozzle, wherein the transverse moving mechanism 14 drives the longitudinal moving mechanism 15 to move horizontally, the longitudinal moving mechanism 15 drives the rotary clamping mechanism 16 to move up and down, the rotary clamping mechanism 16 drives the air blowing pipe 17 to rotate, and a sealing ring is also installed at a distance from the tip of the air blowing nozzle 18, and a sealing gasket is sleeved on the sealing ring. When in use, the air blowing nozzle 18 is connected to the airway, and the sealing ring is used to prevent the blown industrial gas from leaking outward to cause loss and avoid polluting the atmosphere.

[0020] The frame 1 includes an adjustment foot 19, a cross bar 20, a vertical bar 21 and a reinforcing rod 22. The adjustment foot 19 is threadedly connected to the bottom center of the vertical bar 21, the cross bar 20 is horizontally connected to the upper and lower ends of the vertical bar 21, and the middle of the vertical bar 21 is also connected to the reinforcing rod 22. There are four adjustment feet 19, each of which can be individually adjusted to a distance from the vertical bar 21, so that the frame 1 can be supported on uneven ground, and the gas rod can improve the strength of the connection structure.

[0021] The lateral movement mechanism 14 includes a driving motor 23, a shell 24 and a slider 25. The driving motor 23 is installed at one end of the shell 24 and is electrically connected to an external power source. The slider 25 is slidably connected to the shell 24 and is driven by the driving motor 23 to move horizontally.

[0022] The longitudinal moving mechanism 15 includes a driving motor 23, a shell 24 and a slider 25. The driving motor 23 is installed at one end of the shell 24 and is electrically connected to an external power source. The slider 25 is slidably connected to the shell 24 and is driven by the driving motor 23 to move up and down.

[0023] The rotating clamping mechanism 16 includes a connecting plate 26, a rotating platform 27 and a clamping claw 28. The connecting plate 26 is mounted on the longitudinal moving mechanism 15. The rotating platform 27 is rotatably connected to the connecting plate 26. The clamping claw 28 is a pair, which is slidably connected to the rotating platform 27 and is adjusted and positioned by bolts. The clamping claw 28 can adjust the opening size to facilitate clamping the blowing tube 17. The rotating platform 27 drives the blowing tube 17 to rotate and is positioned by bolts.

[0024] When connected, the shell 24 of the longitudinal clamping mechanism is installed on the slider 25 of the transverse clamping mechanism, and the driving motor 23 of the transverse clamping mechanism drives the longitudinal clamping mechanism to move horizontally. Similarly, the connecting plate 26 of the rotary clamping mechanism 16 is installed on the slider 25 of the longitudinal clamping mechanism, and the driving motor 23 of the longitudinal clamping mechanism drives the rotary clamping mechanism 16 to move up and down. The two moving mechanisms work separately without affecting each other, and the horizontal and vertical positions can be adjusted at the same time, which is convenient for quickly aligning the airway for blowing.

[0025] A group of legs 29 are also provided at the bottom of the gas storage tank 4. The legs 29 are used to support and isolate the gas storage tank 4 from the ground, so that the exhaust pipe 8 at the bottom can be used to exhaust the industrial gas inside.

[0026] The utility model stores industrial gas such as commonly used carbon dioxide gas through a gas storage tank, and draws the gas therein into the blowing mechanism through a vacuum pump, and finally injects it into the sand box from the blowing nozzle. When in use, the blowing pipe can adjust the inclination angle under the action of the rotating clamping mechanism, the height of the blowing nozzle can be adjusted under the movement of the longitudinal moving mechanism, and the horizontal position can be adjusted under the movement of the transverse moving mechanism. It is convenient for blowing sand molds of different sizes and positions. No matter where the sand mold airway is designed, it can be quickly aligned for blowing, and the adjustment is simple and convenient to use.

[0027] The above description is only used to illustrate the technical solution of the utility model rather than to limit it. Other modifications or equivalent substitutions made to the technical solution of the utility model by ordinary technicians in this field should be included in the scope of the claims of the utility model as long as they do not depart from the spirit and scope of the technical solution of the utility model.

Claims

1. A blowing device for foundry sand, characterized in that: It includes a frame, a workbench is fixed on the frame, a blowing mechanism is connected to the workbench, a gas storage tank is also arranged on one side of the frame, a pressure gauge, an air inlet pipe, an air outlet pipe and an exhaust pipe are arranged on the gas storage tank, an air pump is also connected between the air outlet pipe and the blowing mechanism, the air pump is installed on the workbench, includes a cylinder, a booster valve, an air inlet and an air outlet, wherein the air inlet is connected to the air outlet pipe, and the air outlet is connected to the blowing mechanism.

2. The blowing device for foundry sand according to claim 1, characterized in that: The blowing mechanism includes a transverse moving mechanism, a longitudinal moving mechanism, a rotary clamping mechanism, an air blowing pipe and an air blowing nozzle, wherein the transverse moving mechanism is fixed on a workbench, and the longitudinal moving mechanism is connected to the top thereof, the rotary clamping mechanism is installed on the longitudinal clamping mechanism, the air blowing pipe is installed on the rotary clamping mechanism, and the lower end of the air blowing pipe is connected to the air outlet nozzle, wherein the transverse moving mechanism drives the longitudinal moving mechanism to move horizontally, the longitudinal moving mechanism drives the rotary clamping mechanism to move up and down, and the rotary clamping mechanism drives the air blowing pipe to rotate.

3. The blowing device for foundry sand according to claim 1, characterized in that: The frame comprises an adjusting foot, a cross bar, a vertical bar and a reinforcing bar. The adjusting foot is threadedly connected to the center of the bottom of the vertical bar, the cross bar is horizontally connected to the upper and lower ends of the vertical bar, and the middle of the vertical bar is also connected to the reinforcing bar.

4. The blowing device for foundry sand according to claim 2, characterized in that: The lateral movement mechanism includes a driving motor, a shell and a slider. The driving motor is installed at one end of the shell and is electrically connected to an external power supply. The slider is slidably connected to the shell and is driven by the driving motor to move horizontally.

5. The blowing device for foundry sand according to claim 2, characterized in that: The longitudinal movement mechanism includes a driving motor, a shell and a slider. The driving motor is installed at one end of the shell and is electrically connected to an external power supply. The slider is slidably connected to the shell and is driven by the driving motor to move up and down.

6. The blowing device for foundry sand according to claim 2, characterized in that: The rotating clamping mechanism includes a connecting plate, a rotating table and a clamping claw. The connecting plate is installed on the longitudinal moving mechanism. The rotating table is rotatably connected to the connecting plate. The clamping claws are a pair, which are slidably connected to the rotating table and are adjusted and positioned by bolts. The clamping claws can adjust the opening size to facilitate clamping the blowing pipe. The rotating table will drive the blowing pipe to rotate and be positioned by bolts.

7. The blowing device for foundry sand according to claim 1, characterized in that: A group of legs are also provided at the bottom of the gas storage tank, through which the gas storage tank support is isolated from the ground, making it convenient for the exhaust pipe at the bottom to exhaust the internal industrial gas for processing.

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