Moulding device for sand casting

Abstract

The invention provides a molding device for sand casting, and relates to the technical field of casting molding. The purpose is to solve the technical problem that when water glass sand is used in the prior art to manufacture sand molds, the operation is basically completed manually, and the mechanization degree is low. The adopted technical scheme is: the molding device for sand casting includes: a stirring tank, a dissolving tank, a sand feeding tank, a conveying mechanism, a leveling mechanism, and a compacting mechanism; the top of the dissolving tank is provided with a feeding port and adapted to a feeding valve; the upper part of the dissolving tank is connected with a first water inlet pipe and adapted to the first water inlet valve; the bottom of the dissolving tank is provided with a downwardly extending discharge pipe; the discharge pipe is sequentially provided with a liquid storage valve and a liquid discharge valve from top to bottom to form a liquid storage chamber between the two valves; the liquid storage chamber is connected with a second water inlet pipe and adapted to the second water inlet valve. The invention can prevent the equipment from being blocked due to the hardening of water glass or water glass sand, and is suitable for manufacturing sand molds with water glass sand; it is conducive to improving the degree of mechanization and reducing the dependence on manual labor.

Description

Technical Field

[0001] The invention relates to the technical field of casting molding, in particular to a molding device used for sand casting. Background Art

[0002] Sand casting refers to a casting method that produces castings in sand molds. Steel, iron and most non-ferrous alloy castings can be obtained through sand casting. The basic raw materials for making sand molds are foundry sand and sand binder; among them, water glass is a commonly used sand binder; foundry sand using water glass as a sand binder is also called water glass sand.

[0003] Since water glass and water glass sand are easy to cause equipment blockage due to hardening and drying, when the prior art uses water glass sand to manufacture sand molds, the entire operation process is basically completed manually, and its mechanization and automation levels need to be improved. Summary of the invention

[0004] The purpose of the present invention is to provide a molding device for sand casting, which can prevent the equipment from being blocked due to the hardening of water glass or water glass sand, and is suitable for making sand molds using water glass sand; it is beneficial to improve the degree of mechanization and automation, and reduce the dependence on manual labor.

[0005] To achieve the above object, the technical solution adopted by the present invention is:

[0006] The molding device for sand casting comprises: a stirring tank for mixing water glass and casting sand, a dissolving tank for supplying water glass to the stirring tank, a sand supplying tank for supplying casting sand to the stirring tank, a conveying mechanism for conveying a sand box, a leveling mechanism for leveling the sand box, and a compacting mechanism for compacting the sand box; wherein the stirring tank is provided with a first stirring blade and is adapted to be equipped with a first motor for driving the first stirring blade to rotate; the bottom of the stirring tank is provided with a discharge port and is adapted to be equipped with a discharge valve; the top of the dissolving tank is provided with a feeding port and is adapted to be equipped with a feeding port; valve; the upper part of the dissolving tank is connected with the first water inlet pipe and is adapted to the first water inlet valve; the bottom of the dissolving tank is provided with a discharge pipe extending downward; the discharge pipe is provided with a storage valve and a discharge valve in sequence from top to bottom to form a storage chamber between the two valves; the storage chamber is connected with the second water inlet pipe and is adapted to the second water inlet valve; the top of the sand feeding tank is provided with a feed port and the bottom is provided with a discharge pipe extending downward; the discharge pipe is provided with a storage valve and a discharge valve in sequence from top to bottom to form a storage chamber between the two valves.

[0007] Optionally, the top of the second water inlet pipe is connected to an exhaust branch pipe extending upward, and the exhaust branch pipe is located on the side of the second water inlet valve facing the liquid storage chamber; a float plug is provided in the exhaust branch pipe; the float plug includes a plug head and a plug column connected in sequence from top to bottom; an exhaust port is provided on the top of the exhaust branch pipe, which gradually shrinks from bottom to top, and the plug head gradually shrinks from bottom to top to match the exhaust port; the diameter of the plug column is matched with the inner diameter of the exhaust branch pipe and is larger than the maximum diameter of the plug head; the plug column is provided with an air hole penetrating up and down in the part exceeding the circumference of the plug head, an air cavity connected with the air hole is provided in the plug column, and the bottom of the plug column has a first interface connected with the air cavity; the bottom of the air cavity is higher than the bottom of the liquid storage valve; a float plate is provided in the liquid storage chamber, the float plate has a plurality of through holes penetrating up and down, and a second interface is provided at the bottom of the through hole located in the center of the float plate; the first interface is connected with the second interface through a hose.

[0008] Optionally, an upper interface with a first outer ring portion is provided at the top of the second water inlet pipe, and a second outer ring portion is provided at the bottom of the exhaust branch pipe, and the first outer ring portion and the second outer ring portion are connected by bolts; an annular groove for installing a gasket is provided along the inner wall of the upper interface of the second water inlet pipe; the inner diameter of the gasket is smaller than the diameter of the plug column and larger than the outer diameter of the first interface and the hose, so as to limit the float plug in the exhaust branch pipe.

[0009] Optionally, an elastic sealing ring is sleeved on the lower part of the plug; the exhaust branch pipe is provided with a sealing groove at the bottom of the exhaust port; when the plug blocks the exhaust port, the upper surface of the elastic sealing ring abuts against the lower surface of the sealing groove to form a seal; the floating plate is provided with a restricted portion extending downward at the edge to prevent the floating plate from turning over in the liquid storage chamber.

[0010] Optionally, a material receiving port is provided at the top of the stirring tank, and the stirring tank is adapted to be driven by a first power source to move forward and backward; a second stirring blade is provided in the dissolving tank, and a second motor is adapted to drive the second stirring blade to rotate; a third stirring blade is provided in the sand feeding tank, and a third motor is adapted to drive the third stirring blade to rotate.

[0011] Optionally, the third stirring blade includes: an upper shaft rod and a lower shaft rod connected coaxially, and a plurality of blades distributed on the upper shaft rod and the lower shaft rod; the lower shaft rod extends from the lower part of the sand feeding tank to the material storage chamber; the material storage valve includes: a valve body, left and right valve plates arranged in the valve body, and a second power source for driving the two valve plates to close or separate; the two valve plates are correspondingly provided with notches to form an axial hole for the lower shaft rod to pass through when closed.

[0012] Optionally, the leveling mechanism includes: a rod frame, a plurality of leveling rods distributed along the length direction of the rod frame, a third power source for driving the rod frame to rotate back and forth in the horizontal direction, a fourth power source for driving the third power source to move up and down, and a fifth power source for driving the fourth power source to move left and right; the leveling rod includes: a main body section, a restricted section located at the top of the main body section; the diameter of the restricted section is larger than the main body section; the rod frame has a rod hole running through it from top to bottom, and the aperture of the rod hole is adapted to the diameter of the main body section; a rod barrel is detachably mounted on the top of the rod frame, and the top of the rod barrel is closed; the inner diameter of the rod barrel is adapted to the diameter of the restricted section; a first compression spring is provided in the rod barrel to apply a downward thrust to the leveling rod.

[0013] Optionally, the lower end of the rod barrel is provided with a third outer ring portion surrounding the outer circumference, and the third outer ring portion is connected to the rod frame by bolts; the leveling rod is equipped with a leveling comb; the leveling comb includes: a sleeve sleeved on the leveling rod, and a plurality of comb teeth arranged on the outer circumference of the sleeve; the leveling rod is provided with a second compression spring above the leveling comb to apply a downward thrust to the leveling comb; the leveling rod is provided with limiting bolts on the circumferential side of the lower part to support and limit the lower end of the leveling comb.

[0014] Optionally, the conveying mechanism includes: a loading platform, a sixth power source driving the loading platform to move forward and backward, and a positioning mechanism arranged on the loading platform; the positioning mechanism includes: a left side plate and a rear side plate arranged on the loading platform, a right side plate cooperating with the left side plate, a front side plate cooperating with the rear side plate, a seventh power source driving the right side plate to move left and right, and an eighth power source driving the front side plate to move forward and backward.

[0015] Optionally, the compacting mechanism includes: a lifting seat, a pressing plate installed at the bottom of the lifting seat, and a ninth power source for driving the lifting seat to move up and down.

[0016] The working principle of the present invention is as follows: open the feeding valve to feed solid sodium silicate into the dissolving tank; open the first water inlet valve to feed water into the dissolving tank; make the solid sodium silicate dissolve in water, and then make water glass in the dissolving tank. Open the liquid storage valve to make the water glass flow into and fill the liquid storage chamber; then close the liquid storage valve and open the liquid discharge valve to discharge the water glass in the liquid storage chamber into the stirring tank; in this way, the water glass can be quantitatively supplied to the stirring tank based on the volume of the liquid storage chamber. Open the material storage valve to make the foundry sand in the sand feeding tank fall into and fill the material storage chamber; then close the material storage valve and open the discharge valve to discharge the foundry sand in the material storage chamber into the stirring tank; in this way, the foundry sand can be quantitatively supplied to the stirring tank based on the volume of the material storage chamber. Make the first stirring blade mix the foundry sand in the stirring tank with water glass, and then make water glass sand; open the discharge valve to make the stirred water glass sand fall into the sand box. The leveling mechanism distributes the water glass sand evenly and flatly in the sand box; the compacting mechanism compacts the water glass sand in the sand box. The sand box is transported away, and the sand mold can be obtained after the water glass sand in the sand box hardens. After completing the sand mold manufacturing task of the day, close the liquid storage valve of the liquid storage chamber, open the second water inlet valve to allow the second water inlet pipe to supply water to the liquid storage chamber, and repeatedly open and close the discharge valve to clean the discharge valve; at the same time, repeatedly open and close the discharge valve of the mixing tank to clean the discharge valve of the mixing tank; finally, close the discharge valve, fill the liquid storage chamber with water, and soak the lower part of the liquid storage valve in water. In this way, the liquid storage valve and the discharge valve can be prevented from being blocked due to the hardening of the water glass, and the discharge valve can be prevented from being blocked due to the hardening of the water glass sand.

[0017] It can be seen that the beneficial effect of the present invention is that it can prevent the liquid storage valve, the liquid discharge valve and the material discharge valve from being blocked due to the hardening of water glass or water glass sand. It can be applied to the manufacture of sand molds using water glass sand, which is beneficial to improve the degree of mechanization and automation and reduce the dependence on manual labor. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 It is a structural schematic diagram of the present invention;

[0020] Figure 2 It is a structural schematic diagram of a mixing tank;

[0021] Figure 3 It is a structural schematic diagram of a dissolving tank;

[0022] Figure 4 It is a schematic diagram of the assembly of the exhaust branch pipe and the second water inlet pipe;

[0023] Figure 5 It is a schematic diagram of the assembly of the float plug, the float plate and the hose;

[0024] Figure 6 A schematic diagram of setting an exhaust port for an exhaust branch pipe;

[0025] Figure 7 The structural diagram of the sand tank is shown below;

[0026] Figure 8 It is a schematic diagram of the lower shaft rod passing through the storage valve;

[0027] Fig. 9 It is a schematic diagram of the connection between the upper shaft rod and the lower shaft rod;

[0028] Fig.10 It is a structural schematic diagram of the leveling mechanism;

[0029] Fig.11 It is a connection diagram of the rod frame, the third power source, the fourth power source, and the fifth power source;

[0030] Fig.12 It is the assembly diagram of the leveling mechanism;

[0031] Fig.13 The figure is a schematic diagram of the assembly of the rod frame, the leveling rod, the rod barrel and the leveling comb;

[0032] Fig.14 It is a structural schematic diagram of the conveying mechanism and the compacting mechanism.

[0033] 1. Mixing tank; 2. Dissolving tank; 3. Sand feeding tank; 4. Conveying mechanism; 5. Smoothing mechanism; 6. Compacting mechanism; 7. First motor; 8. Discharge valve; 9. Feeding port; 10. Feeding valve; 11. First water inlet pipe; 12. First water inlet valve; 13. Liquid storage valve; 14. Discharge valve; 15. Liquid storage chamber; 16. Second water inlet pipe; 17. Second water inlet valve; 18. Feeding port; 19. Storage valve; 20. Discharge valve; 21. Storage chamber; 22. Exhaust branch pipe; 23. Floating plug; 24. Plug; 25. Plug column; 26. Exhaust port; 27. Air hole; 28. First interface; 29. ​​Floating plate; 30. Through hole; 32. Gasket; 33. Annular groove; 34. Hose; 35. Upper interface; 36. Elastic sealing ring; 37. Sealing groove; 38. Restricted part; 39. Receiving port ;40. first power source;41. second motor;42. third motor;43. upper shaft;44. lower shaft;45. valve plate;46. second power source;47. rod frame;48. leveling rod;49. third power source;50. fourth power source;51. fifth power source;52. main section;53. restricted section;54. rod hole;55. rod barrel;56. first compression spring;57. leveling comb;58. comb teeth;59. sleeve;60. second compression spring;61. limit bolt;62. loading platform;63. sixth power source;64. left side plate;65. rear side plate;66. right side plate;67. front side plate;68. seventh power source;69. eighth power source;70. lifting seat;71. pressure plate;72. ninth power source;73. shock-absorbing spring;74. tenth power source. DETAILED DESCRIPTION

[0034] In the following, only some exemplary embodiments are briefly described. As those skilled in the art will appreciate, the described embodiments may be modified in various ways without departing from the spirit or scope of the present invention. Therefore, the drawings and descriptions are considered to be exemplary and non-restrictive in nature.

[0035] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by the terms "front", "rear", "left", "right", etc. are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0036] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0037] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0039] Example 1

[0040] like Figure 1 , Figure 2 , Figure 3 , Figure 7 As shown, an embodiment of the present invention provides a molding device for sand casting. The molding device includes: a stirring tank 1 for mixing water glass and casting sand, a dissolving tank 2 for supplying water glass to the stirring tank 1, a sand supply tank 3 for supplying casting sand to the stirring tank 1, a conveying mechanism 4 for conveying a sand box, a leveling mechanism 5 for leveling the sand box, and a compacting mechanism 6 for compacting the sand box. It should be understood that a liquid level sensor can be provided in the dissolving tank 2 to monitor the remaining amount of water glass in the dissolving tank 2. A first stirring blade is provided in the stirring tank 1, and a first motor 7 is adapted to drive the first stirring blade to rotate. A discharge port is provided at the bottom of the stirring tank 1 and a discharge valve 8 is adapted. A feeding port 9 is provided at the top of the dissolving tank 2, and a feeding valve 10 is adapted. The upper part of the dissolving tank 2 is connected to a first water inlet pipe 11, and a first water inlet valve 12 is adapted. It should be understood that water can be fed into the dissolving tank 2 through the first water inlet pipe 11, and solid sodium silicate can be fed into the dissolving tank 2 through the feeding port 9 to produce water glass in the dissolving tank 2. In addition, sodium hydroxide and silicon dioxide can be fed into the dissolving tank 2 through the feeding port 9 to produce water glass in the dissolving tank 2. A downwardly extending discharge pipe is provided at the bottom of the dissolving tank 2. The discharge pipe is provided with a liquid storage valve 13 and a liquid discharge valve 14 in sequence from top to bottom to form a liquid storage chamber 15 between the two valves. The liquid storage chamber 15 is connected to the second water inlet pipe 16 and is adapted to the second water inlet valve 17. A feed port 18 is provided at the top of the sand feeding tank 3, and a downwardly extending discharge pipe is provided at the bottom. It should be understood that the foundry sand can be fed into the feed port 18 of the sand feeding tank 3 through a conveyor belt. A storage valve 19 and a discharge valve 20 are provided in sequence from top to bottom on the discharge pipe to form a storage chamber 21 between the two valves. It should be understood that the discharge valve 20 is generally a butterfly valve.

[0041] The specific implementation of the molding device is described below: open the feeding valve 10 to feed solid sodium silicate into the dissolving tank 2; open the first water inlet valve 12 to feed water into the dissolving tank 2; make the solid sodium silicate dissolve in water, and then make water glass in the dissolving tank 2. Open the liquid storage valve 13 to allow the water glass to flow into and fill the liquid storage chamber 15; then close the liquid storage valve 13 and open the liquid discharge valve 14 to discharge the water glass in the liquid storage chamber 15 into the mixing tank 1; in this way, the water glass can be quantitatively supplied to the mixing tank 1 based on the volume of the liquid storage chamber 15. Open the material storage valve 19 to allow the foundry sand in the sand supply tank 3 to fall into and fill the material storage chamber 21; then close the material storage valve 19 and open the discharge valve 20 to discharge the foundry sand in the material storage chamber 21 into the mixing tank 1; in this way, the foundry sand can be quantitatively supplied to the mixing tank 1 based on the volume of the material storage chamber 21. The first stirring blade is used to mix the foundry sand and water glass in the stirring tank 1 to obtain water glass sand; the discharge valve 8 is opened to allow the stirred water glass sand to fall into the sand box. The leveling mechanism 5 is used to distribute the water glass sand evenly and flatly in the sand box; the compacting mechanism 6 is used to compact the water glass sand in the sand box. The sand box is transported away, and the sand mold is obtained after the water glass sand in the sand box hardens. After completing the sand mold manufacturing task of the day, the liquid storage valve 13 of the liquid storage chamber 15 is closed, the second water inlet valve 17 is opened to allow the second water inlet pipe 16 to supply water to the liquid storage chamber 15, and the discharge valve 14 is repeatedly opened and closed to clean the discharge valve 14; at the same time, the discharge valve 8 of the stirring tank 1 is repeatedly opened and closed to clean the discharge valve 8 of the stirring tank 1; finally, the discharge valve 14 is closed to fill the liquid storage chamber 15 with water, so that the lower part of the liquid storage valve 13 is soaked in water. In this way, the liquid storage valve 13 and the liquid discharge valve 14 can be prevented from being blocked due to the hardening of the water glass, and the discharge valve 8 can be prevented from being blocked due to the hardening of the water glass sand. Therefore, the molding device can be applied to the manufacture of sand molds using water glass sand, which is conducive to improving the degree of mechanization and automation, and reducing the dependence on manual labor.

[0042] Example 2

[0043] like Figure 3 to Figure 6As shown, on the basis of Example 1, the top of the second water inlet pipe 16 is connected to the exhaust branch pipe 22 extending upward, and the exhaust branch pipe 22 is located on the side of the second water inlet valve 17 facing the liquid storage chamber 15; a floating plug 23 is provided in the exhaust branch pipe 22; the floating plug 23 includes a plug head 24 and a plug column 25 connected in sequence from top to bottom; the top of the exhaust branch pipe 22 is provided with an exhaust port 26 that gradually decreases from bottom to top, and the plug head 24 gradually decreases from bottom to top to match the exhaust port 26; the diameter of the plug column 25 is matched with the inner diameter of the exhaust branch pipe 22 , and is larger than the maximum diameter of the plug 24; the plug 25 is provided with an air hole 27 penetrating up and down at the part beyond the peripheral side of the plug 24, the plug 25 is provided with an air cavity connected with the air hole 27, and the bottom of the plug 25 has a first interface 28 connected with the air cavity; the bottom of the air cavity is higher than the bottom of the liquid storage valve 13; a floating plate 29 is provided in the liquid storage chamber 15, and the floating plate 29 has a plurality of through holes 30 penetrating up and down, and a second interface is provided at the bottom of the through hole 30 located at the center of the floating plate 29; the first interface 28 is connected with the second interface through a hose 34.

[0044] It should be understood that the section of the second water inlet pipe 16 located on the right side of the second water inlet valve 17 is also part of the liquid storage chamber 15; in order to avoid water glass being retained in this section of the second water inlet pipe 16 and causing waste, this section of the second water inlet pipe 16 is configured to extend in the horizontal direction, or extend obliquely downward from the second water inlet valve 17 to the liquid storage chamber 15. The height of the liquid storage valve 13 is higher than the height of the second water inlet pipe 16, so that when cleaning the drain valve 14, it is difficult to clean the lower part of the liquid storage valve 13 at the same time. The float 23 and the float plate 29 can be made of lightweight materials such as plastic and rubber whose density is less than that of water. After the drain valve 14 is cleaned, the drain valve 14 is closed and water is supplied to the liquid storage chamber 15 through the second water inlet valve 17. At this time, the float plate 29 will float on the water surface. Since the bottom of the air cavity is higher than the bottom of the liquid storage valve 13, the air in the upper part of the liquid storage chamber 15 will pass through the second interface of the float plate 29, the hose 34, the first interface 28 of the plug 25, the air cavity of the plug 25, the air hole 27 of the plug 25 in sequence, and finally be discharged from the exhaust port 26 of the exhaust branch pipe 22. In this way, the liquid storage chamber 15 can be filled with water to avoid a large amount of air being blocked in the upper part of the liquid storage chamber 15. In this way, the lower part of the liquid storage valve 13 can be soaked in water. When the work is stopped for a long time due to holidays, weekends or other situations, the liquid storage valve 13 can be prevented from being blocked due to the hardening and drying of the water glass remaining in the lower part. When the liquid storage chamber 15 is filled with water, the float plug 23 will float along the exhaust branch pipe 22 and finally block the exhaust port 26. In addition, the plug 25 can be configured as two sections connected to each other in an upper and lower manner, so as to facilitate machining of an air cavity in the plug 25 .

[0045] Example 3

[0046] like Figure 3 to Figure 6As shown, on the basis of Example 2, an upper interface 35 with a first outer ring portion is provided at the top of the second water inlet pipe 16, and a second outer ring portion is provided at the bottom of the exhaust branch pipe 22, and the first outer ring portion and the second outer ring portion are connected by bolts; an annular groove 33 for installing a gasket 32 ​​is provided along the inner wall of the upper interface 35 of the second water inlet pipe 16; the inner diameter of the gasket 32 ​​is smaller than the diameter of the plug 25 and larger than the outer diameter of the first interface 28 and the hose 34, so as to limit the float 23 in the exhaust branch pipe 22.

[0047] It should be understood that the gasket 32 ​​can prevent the float 23 from falling into the second water inlet pipe 16. In addition, the minimum height of the float 23 can be adjusted by setting the gaskets 32 with different axial lengths to ensure that the bottom of the air cavity in the float 23 is higher than the bottom of the liquid storage valve 13. With the above structure, the production, assembly and maintenance of each component will be more convenient.

[0048] Example 4

[0049] like Figure 3 to Figure 6 As shown, on the basis of Example 2 or Example 3, an elastic sealing ring 36 is sleeved on the lower part of the plug 24; the exhaust branch pipe 22 is provided with a sealing groove 37 at the bottom of the exhaust port 26; when the plug 24 blocks the exhaust port 26, the upper surface of the elastic sealing ring 36 abuts against the lower surface of the sealing groove 37 to form a seal; the floating plate 29 is provided with a restricted portion 38 extending downward at the edge to prevent the floating plate 29 from turning over in the liquid storage chamber 15.

[0050] It should be understood that by providing the elastic sealing ring 36, the float plug 23 can better seal the exhaust port 26. By providing the limiting portion 38, the float plate 29 has its overall maximum length greater than the inner diameter of the discharge pipe, which can prevent the float plate 29 from turning over in the liquid storage chamber 15, thereby ensuring that the float plate 29 and the hose 34 can work stably and effectively discharge the gas in the upper part of the liquid storage chamber 15.

[0051] Example 5

[0052] like Figure 1 , Figure 2 , Figure 3 , Figure 7 As shown, on the basis of any one of Examples 1 to 4, a material receiving port 39 is provided at the top of the stirring tank 1, and the stirring tank 1 is adapted to be driven by a first power source 40 to move forward and backward; a second stirring blade is provided in the dissolving tank 2, and a second motor 41 is adapted to be driven to rotate the second stirring blade; a third stirring blade is provided in the sand feeding tank 3, and a third motor 42 is adapted to be driven to rotate the third stirring blade.

[0053] It should be understood that the first power source 40 can be configured as a combination of a ball screw and a servo motor, or as a linear motor. The second stirring blade can accelerate the dissolution. The third stirring blade can prevent the foundry sand from accumulating in the sand feeding tank 3 and being unable to fall. The first power source 40 drives the stirring tank 1 to move forward and backward to receive the water glass discharged from the dissolving tank 2 and the foundry sand discharged from the sand feeding tank 3; rather than connecting the stirring tank 1 with the dissolving tank 2 and the stirring tank 1 with the sand feeding tank 3 through a pipeline, it can be more flexible and the later maintenance of the stirring tank 1 will be more convenient. In addition, a tenth power source 74 that drives the stirring tank 1 to move left and right can be provided, and the first power source 40 drives the sand feeding tank 3 to move forward and backward by driving the tenth power source 74 to move forward and backward; the tenth power source 74 can be configured as a combination of a ball screw and a servo motor, or as a linear motor.

[0054] Example 6

[0055] like Figure 7 to Figure 9 As shown, on the basis of Example 5, the third stirring blade includes: an upper shaft rod 43 and a lower shaft rod 44 that are coaxially connected, and a plurality of blades distributed on the upper shaft rod 43 and the lower shaft rod 44; the lower shaft rod 44 extends from the lower part of the sand feeding tank 3 to the storage chamber 21; the storage valve 19 includes: a valve body, left and right valve plates 45 arranged in the valve body, and a second power source 46 that drives the two valve plates 45 to close or separate; the two valve plates 45 are correspondingly provided with notches to form an axial hole for the lower shaft rod 44 to pass through when closed.

[0056] It should be understood that the blades distributed on the lower shaft 44 can prevent the foundry sand from accumulating in the storage chamber 21 and being unable to fall. The second power source 46 is usually configured as a cylinder. The second power source 46 drives the two valve plates 45 to close, so that the storage valve 19 is closed; the second power source 46 drives the two valve plates 45 to separate, so that the storage valve 19 is opened.

[0057] Example 7

[0058] like Figure 10 to Figure 13As shown, on the basis of any one of Examples 1 to 6, the leveling mechanism 5 includes: a rod frame 47, a plurality of leveling rods 48 distributed along the length direction of the rod frame 47, a third power source 49 for driving the rod frame 47 to rotate back and forth in the horizontal direction, a fourth power source 50 for driving the third power source 49 to move up and down, and a fifth power source 51 for driving the fourth power source 50 to move left and right; the leveling rod 48 includes: a main body section 52, a restricted section 53 located at the top of the main body section 52; the diameter of the restricted section 53 is larger than the main body section 52; the rod frame 47 has a rod hole 54 running through it from top to bottom, and the aperture of the rod hole 54 is adapted to the diameter of the main body section 52; a rod barrel 55 is detachably mounted on the top of the rod frame 47, and the top of the rod barrel 55 is closed; the inner diameter of the rod barrel 55 is adapted to the diameter of the restricted section 53; a first compression spring 56 is arranged in the rod barrel 55 to apply a downward thrust to the leveling rod 48.

[0059] It should be understood that the third power source 49 drives the rod frame 47 to rotate back and forth, the fourth power source 50 drives the third power source 49 to move the rod frame 47 up and down, and the fifth power source 51 drives the fourth power source 50 to move the third power source 49 and the rod frame 47 left and right; the leveling rod 48 can be inserted and pulled in the water glass sand in the sand box, so that the water glass sand is evenly distributed in the sand box to prevent the formation of cavities in the sand mold. In addition, the sixth power source 63 described below can also be driven to move the sand box forward and backward to better level the water glass sand in the sand box. The third power source 49 can be set as a swing cylinder or a servo motor; the fourth power source 50 is usually set as a cylinder; the fifth power source 51 can be set as a combination of a ball screw and a servo motor, or can be set as a linear motor. When manufacturing a sand mold, a mold is provided at the bottom of the sand box. When the lower ends of some leveling rods 48 are against the mold, the first compression springs 56 at the tops of these leveling rods 48 will shrink; in this way, the rod frame 47 can continue to descend, and other leveling rods 48 can continue to be inserted into the depth of the water glass sand to level the water glass sand. In addition, a shock absorbing spring 73 can be provided below the restricted section 53 in the rod barrel 55 to prevent the restricted section 53 from colliding with the rod frame 47. The above structure is adopted in the present application, so that the leveling rods 48 and the rod barrel 55 can be easily disassembled and assembled, and the installation position and number of the leveling rods 48 can be flexibly adjusted according to the size of the sand box.

[0060] Example 8

[0061] like Figure 10 to Figure 13As shown, on the basis of Example 7, the lower end of the rod barrel 55 is provided with a third outer ring portion surrounding the outer circumference, and the third outer ring portion is connected to the rod frame 47 by bolts; the leveling rod 48 is equipped with a leveling comb 57; the leveling comb 57 includes: a sleeve 59 sleeved on the leveling rod 48, and a plurality of comb teeth 58 arranged on the outer circumference of the sleeve 59; the leveling rod 48 is provided with a second compression spring 60 above the leveling comb 57 to apply a downward thrust to the leveling comb 57; the leveling rod 48 is provided with a limiting bolt 61 on the circumferential side of the lower part to support and limit the lower end of the leveling comb 57.

[0062] It should be understood that the leveling effect and leveling efficiency of the water glass sand can be further improved by installing the leveling comb 57 on the leveling rod 48. In addition, when some teeth 58 of the leveling comb 57 are against the mold, the second compression spring 60 on the top of the leveling comb 57 will shrink. If the lower end of the leveling rod 48 on which the leveling comb 57 is installed is not blocked by the mold, the leveling rod 48 can continue to be inserted downward, thereby more fully and effectively leveling the water glass sand.

[0063] Example 9

[0064] like Figure 1 , Fig.14 As shown, on the basis of any one of Examples 1 to 8, the conveying mechanism 4 includes: a loading platform 62, a sixth power source 63 for driving the loading platform 62 to move forward and backward, and a positioning mechanism arranged on the loading platform 62; the positioning mechanism includes: a left side plate 64 and a rear side plate 65 arranged on the loading platform 62, a right side plate 66 cooperating with the left side plate 64, a front side plate 67 cooperating with the rear side plate 65, a seventh power source 68 for driving the right side plate 66 to move left and right, and an eighth power source 69 for driving the front side plate 67 to move forward and backward.

[0065] It should be understood that large sand boxes are generally transported by cranes; after the sand box is transported to the loading platform 62, the seventh power source 68 drives the right side plate 66 to move leftward, and the eighth power source 69 drives the front side plate 67 to move backward, so that the sand box can be positioned in coordination with the left side plate 64 and the rear side plate 65. The sixth power source 63 can be configured as a combination of a ball screw and a servo motor, or as a linear motor. The sixth power source 63 drives the loading platform 62 to move forward and backward with the sand box, so that the water glass sand discharged from the mixing tank 1 can be more conveniently received, or coordinated with the leveling mechanism 5 and the compacting mechanism 6. The seventh power source 68 and the eighth power source 69 are usually configured as cylinders.

[0066] Example 10

[0067] like Figure 1 , Fig.14As shown, based on any one of embodiments 1 to 9, the compacting mechanism 6 includes: a lifting seat 70, a pressing plate 71 installed at the bottom of the lifting seat 70, and a ninth power source 72 for driving the lifting seat 70 to move up and down.

[0068] It should be understood that the pressing plate 71 can be a wooden board and can be installed on the bottom of the lifting seat 70 by bolts; in this way, wooden boards of different sizes can be conveniently cut to be suitable for sand boxes of different sizes. The ninth power source 72 is usually configured as a cylinder or an oil cylinder. After the water glass sand in the sand box is leveled, the water glass sand in the sand box can be compacted and pressed by the compacting mechanism 6.

[0069] Although specific embodiments of the present invention are described above, those skilled in the art should understand that various changes or modifications may be made to these embodiments without departing from the principles and essence of the present invention, and these changes and modifications are all within the scope of protection of the present invention.

Claims

1. A molding device for sand casting, characterized in that: include: A mixing tank for mixing water glass and foundry sand; and a dissolving tank that supplies water glass to the mixing tank; and A sand feeding tank for supplying foundry sand to the mixing tank; and A conveying mechanism for conveying the sand box; and Leveling mechanism for leveling the flask; and A compacting mechanism for compacting the sand box; in, The top of the dissolving tank is provided with a feeding port, and is adapted to a feeding valve; the upper part of the dissolving tank is connected to the first water inlet pipe, and is adapted to the first water inlet valve; A liquid discharge pipe extending downward is provided at the bottom of the dissolving tank; a liquid storage valve and a liquid discharge valve are sequentially provided on the liquid discharge pipe from top to bottom to form a liquid storage chamber between the two valves; The liquid storage chamber is communicated with the second water inlet pipe and is adapted to the second water inlet valve; The top of the sand feeding tank is provided with a feed port, and the bottom is provided with a discharge pipe extending downward; the discharge pipe is provided with a storage valve and a discharge valve in sequence from top to bottom to form a storage chamber between the two valves; The top of the second water inlet pipe is connected to an exhaust branch pipe extending upward, and the exhaust branch pipe is located on a side of the second water inlet valve facing the liquid storage chamber; A floating plug is provided in the exhaust branch pipe; the floating plug comprises a plug head and a plug column connected in sequence from top to bottom; The top of the exhaust branch pipe is provided with an exhaust port which gradually decreases from bottom to top, and the plug head gradually decreases from bottom to top to fit with the exhaust port; The diameter of the plug is adapted to the inner diameter of the exhaust branch pipe and is larger than the maximum diameter of the plug head; The plug is provided with an air hole extending vertically and horizontally at a portion of the plug extending beyond the peripheral side of the plug head, an air cavity communicating with the air hole is provided inside the plug, and a first interface communicating with the air cavity is provided at the bottom of the plug; the bottom of the air cavity is higher than the bottom of the liquid storage valve; A floating plate is provided in the liquid storage chamber, the floating plate has a plurality of through holes extending vertically therethrough, and a second interface is provided at the bottom of the through hole located in the center of the floating plate; The first interface is connected to the second interface through a hose; The floating plug and the floating plate are made of a light material with a density less than that of water, and a restricted portion extending downward is arranged at the edge of the floating plate; The leveling mechanism includes: a rod frame, a plurality of leveling rods distributed along the length direction of the rod frame, a third power source driving the rod frame to rotate back and forth in the horizontal direction, a fourth power source driving the third power source to move up and down, and a fifth power source driving the fourth power source to move left and right; The leveling rod comprises: a main body section, a restricted section located at the top of the main body section; The restricted segment has a diameter greater than the main segment; The rod frame has a rod hole that passes through from top to bottom, and the diameter of the rod hole matches the diameter of the main body section; A rod barrel is detachably mounted on the top of the rod frame, and the top of the rod barrel is closed; the inner diameter of the rod barrel is adapted to the diameter of the restricted section; A first compression spring is arranged in the rod barrel to apply a downward thrust to the leveling rod.

2. The molding device for sand casting according to claim 1, characterized in that: A first stirring blade is arranged in the stirring tank, and a first motor is adapted to drive the first stirring blade to rotate; a discharge port is arranged at the bottom of the stirring tank, and a discharge valve is adapted.

3. The molding device for sand casting according to claim 2, characterized in that: The top of the second water inlet pipe is provided with an upper interface having a first outer ring portion, the bottom of the exhaust branch pipe is provided with a second outer ring portion, and the first outer ring portion and the second outer ring portion are connected by bolts; An annular groove for mounting a gasket ring is provided along the inner wall of the upper interface of the second water inlet pipe; The inner diameter of the gasket ring is smaller than the diameter of the plug rod and larger than the outer diameters of the first interface and the hose, so as to limit the floating plug in the exhaust branch pipe.

4. The molding device for sand casting according to claim 2, characterized in that: The lower part of the plug is sleeved with an elastic sealing ring; the exhaust branch pipe is provided with a sealing groove at the bottom of the exhaust port; When the plug blocks the exhaust port, the upper surface of the elastic sealing ring abuts against the lower surface of the sealing groove to form a seal.

5. The molding device for sand casting according to any one of claims 1 to 4, characterized in that: A material receiving port is provided on the top of the mixing tank, and the mixing tank is adapted to be equipped with a first power source for driving the mixing tank to move forward and backward; A second stirring blade is provided in the dissolving tank, and a second motor is adapted to drive the second stirring blade to rotate; A third stirring blade is arranged in the sand feeding tank, and a third motor is adapted to drive the third stirring blade to rotate.

6. The molding device for sand casting according to claim 5, characterized in that: The third stirring blade comprises: an upper shaft and a lower shaft connected coaxially, and a plurality of blades distributed on the upper shaft and the lower shaft; The lower shaft rod extends from the lower part of the sand feeding tank to the material storage chamber; The material storage valve comprises: a valve body, two left and right valve plates arranged in the valve body, and a second power source for driving the two valve plates to close or separate; The two valve plates are correspondingly provided with notches to form an axial hole for the lower shaft rod to pass through when they are closed.

7. The molding device for sand casting according to claim 5, characterized in that: The lower end of the rod barrel is provided with a third outer ring portion surrounding the outer circumference, and the third outer ring portion is connected to the rod frame by bolts; The leveling rod is equipped with a leveling comb; The leveling comb comprises: a sleeve sleeved on the leveling rod, and a plurality of comb teeth arranged on the outer periphery of the sleeve; The leveling rod is sleeved with a second compression spring above the leveling comb to apply a downward thrust to the leveling comb; The leveling rod is provided with a limiting bolt on the circumferential side of the lower part to support and limit the lower end of the leveling comb.

8. The molding device for sand casting according to claim 5, characterized in that: The compacting mechanism comprises: a lifting seat, a pressing plate installed at the bottom of the lifting seat, and a ninth power source for driving the lifting seat to move up and down.

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