Screw rod for sand mixer

Abstract

The utility model discloses a screw rod for a sand mixer, belongs to the technical field of screw rods, and solves the problem that sand grains are caked after being conveyed by the conventional screw rod. The screw rod comprises a rotating shaft, a detachable screw blade is arranged on the rotating shaft, a plurality of connecting blocks are arranged on the screw blade, the connecting blocks are arranged on the two sides of each section of screw blade, the connecting blocks are installed on the rotating shaft through locking bolts, one end of the rotating shaft is sleeved with an extension shaft, and the other end of the rotating shaft is sleeved with a nut. A plurality of stirring rods which are obliquely arranged are arranged on the extension shaft, the stirring rods are uniformly arranged on the outer surface of the extension shaft in a surrounding manner, branch rods which are spirally arranged are arranged on the stirring rods, and a locking piece is arranged between the extension shaft and the rotating shaft. The screw rod for the sand mixer is not only simple in structure, but also simple and convenient to maintain, mount and clean, and beneficial to improving the manufacturing quality of molding sand, and has the characteristics of convenience in use and strong practicability.

Description

Technical Field

[0001] This utility model relates to the field of screw rod technology, and in particular to a screw rod for a sand mixer. Background Technology

[0002] A sand mixer is a device that mixes the components in molding sand evenly and effectively coats the surface of the sand particles with binder. It is the main equipment for casting sand processing and molding sand mixing, and also the key equipment for obtaining qualified molding sand. Its basic principle is: by using the relative movement of the grinding wheel and the grinding disc, the material placed between the two is crushed by the action of crushing and grinding. The sand mixer also mixes the material while crushing it.

[0003] In the production process of a sand mixer, a screw feeder is used to transport sand particles. However, during the transport process, the feeding action of the screw feeder mainly relies on the motor to drive the screw rod to rotate. Since the screw rod has helical blades, it will squeeze the sand particles into clumps when rotating and transporting. The clumps of sand particles enter the working chamber of the sand mixer, which will have an adverse effect on the working efficiency and mixing effect of the sand mixer, and affect the quality of the molding sand. Utility Model Content

[0004] The technical problem to be solved by this utility model is to address the above-mentioned shortcomings of the prior art by providing a screw rod for a sand mixer. This mechanism is not only simple in structure, but also easy to maintain, install and clean, and is conducive to improving the quality of molding sand. It has the characteristics of being convenient to use and highly practical.

[0005] The technical solution adopted by this utility model is: a spiral rod for a sand mixer, including a rotating shaft, a detachable spiral blade on the rotating shaft, a plurality of connecting blocks on the spiral blade, the connecting blocks being arranged on both sides of each spiral blade, the connecting blocks being installed on the rotating shaft by locking bolts, an extension shaft being sleeved on one end of the rotating shaft, a plurality of inclined stirring rods being arranged on the extension shaft, the stirring rods being evenly arranged around the outer surface of the extension shaft, the stirring rods being provided with spirally arranged branch bars, and a locking element being provided between the extension shaft and the rotating shaft.

[0006] As a further improvement, the spiral blade has multiple evenly distributed protrusions on both sides of its surface.

[0007] Furthermore, a wear-resistant weld overlay layer is provided on the outermost spiral edge of the spiral blade, and the wear-resistant weld overlay layer is connected to the spiral blade by welding.

[0008] Furthermore, the locking component includes a first magnet block, a second magnet block, and a plurality of locking screws. One end of the extension shaft has a connecting hole, and one end of the rotating shaft has a connecting shaft. The connecting shaft is inserted into the connecting hole. The first magnet block is disposed on one end of the connecting shaft, and the second magnet block is disposed on the bottom of the connecting hole. The locking screws pass through the extension shaft and are threadedly connected to the connecting shaft.

[0009] Furthermore, the surface of the spiral blade is provided with a high-temperature spray-welded tungsten-carbon alloy wear-resistant layer.

[0010] Furthermore, the spiral blade is inlaid with a hard alloy sheet that is aligned with its spiral direction.

[0011] Furthermore, the diameter of the spiral blade is 300mm to 1000mm, and the pitch of the spiral blade is 200 to 300mm.

[0012] Beneficial effects

[0013] Compared with the prior art, this utility model has the following advantages:

[0014] This utility model discloses a screw rod for a sand mixer. By separately assembling the rotating shaft and the screw blade, the screw blade can be quickly replaced for maintenance after wear, eliminating the need for replacing the entire screw rod and effectively saving maintenance costs. An extension shaft is installed at the outlet end of the rotating shaft, and inclined stirring rods and branch rods are installed on the extension shaft. This effectively breaks up the compressed sand particles as they pass through, ensuring that the sand particles conveyed from the screw feeder are in a loose state. This facilitates the uniform mixing of the components in the molding sand by the subsequent sand mixer, effectively improving the quality of the molding sand. Simultaneously, a wear-resistant weld overlay layer is provided on the edge of the screw blade to effectively increase wear resistance and reduce screw blade wear. A high-temperature sprayed tungsten-carbon alloy wear-resistant layer is also applied to the surface of the screw blade to increase the overall structural strength and effectively extend the service life of the screw rod. This design is highly practical and has a wide range of applications. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0016] Figure 2 This is a partial cross-sectional structural diagram of the present invention;

[0017] Figure 3 This is a three-dimensional structural diagram of the spiral blade in this utility model;

[0018] Figure 4 This is an enlarged cross-sectional view of the spiral blade in this utility model.

[0019] Wherein: 1-rotating shaft, 2-spiral blade, 3-connecting block, 4-locking bolt, 5-wear-resistant weld overlay, 6-extension shaft, 7-branch rod, 8-stirring rod, 9-second magnet block, 10-first magnet block, 11-locking screw, 12-protrusion block, 13-tungsten carbide wear-resistant layer, 14-hard alloy sheet, 15-connecting shaft, 16-connecting hole. Detailed Implementation

[0020] The present invention will be further described below with reference to specific embodiments shown in the accompanying drawings.

[0021] See Figure 1-4 As shown, this utility model discloses a screw rod for a sand mixer, comprising a rotating shaft 1, a detachable spiral blade 2 on the rotating shaft 1, and multiple connecting blocks 3 on the spiral blade 2, arranged on both sides of each spiral blade 2. The connecting blocks 3 are mounted on the rotating shaft 1 by locking bolts 4. An extension shaft 6 is sleeved on one end of the rotating shaft 1, and multiple inclined stirring rods 8 are arranged on the extension shaft 6. The stirring rods 8 are evenly arranged around the outer surface of the extension shaft 6, and the stirring rods 8 are provided with spirally arranged branch bars 7. A locking device is provided between the extension shaft 6 and the rotating shaft 1. By separately assembling the rotating shaft 1 and the spiral blade 2, the spiral blade 2 can be quickly replaced for maintenance after wear, without the need to replace the entire spiral blade. This design effectively saves on maintenance costs. By setting an extension shaft 6 at the outlet end of the rotating shaft 1, and installing inclined stirring rods 8 and branch rods 7 on the extension shaft 6, the sand particles are effectively broken up when they pass through, ensuring that the sand particles conveyed from the screw feeder are in a loose state. This facilitates the uniform mixing of the components in the molding sand by the subsequent sand mixer, effectively improving the quality of the subsequent molding sand production. At the same time, by providing a wear-resistant weld overlay layer 5 on the edge of the spiral blade 2, the wear resistance is effectively increased, reducing the wear of the spiral blade 2. Furthermore, a high-temperature spray-welded tungsten-carbon alloy wear-resistant layer 13 is applied to the surface of the spiral blade 2, increasing the overall structural strength and effectively extending the service life of the screw rod.

[0022] Specifically, multiple evenly distributed protrusions 12 are provided on both sides of the spiral blade 2. On the one hand, the protrusions 12 effectively enhance the mechanical strength of the spiral blade 2 and effectively prevent deformation. On the other hand, the protrusions 12 can block and collide with the conveyed sand particles, effectively preventing the sand particles from being squeezed into blocks, making the conveyed sand particles more loose.

[0023] Preferably, a wear-resistant weld overlay layer 5 is provided on the outermost spiral edge of the spiral blade 2. The wear-resistant weld overlay layer 5 is connected to the spiral blade 2 by welding. The wear-resistant weld overlay layer 5 is welded by welding to enhance the wear resistance of the outer edge of the spiral blade 2.

[0024] Furthermore, the locking component includes a first magnet 10, a second magnet 9, and multiple locking screws 11. One end of the extension shaft 6 has a connecting hole 16, and one end of the rotating shaft 1 has a connecting shaft 15. The connecting shaft 15 is inserted into the connecting hole 16. The first magnet 10 is disposed on one end of the connecting shaft 15, and the second magnet 9 is disposed on the bottom of the connecting hole 16. The locking screws 11 pass through the extension shaft 6 and are threadedly connected to the connecting shaft 15. When installing the extension shaft 6, it is inserted into the connecting shaft 15 through the connecting hole 16, which facilitates the mutual attraction of the first magnet 10 and the second magnet 9, forming a preliminary fixing effect. Then, the locking screws 11 are used to lock it in place, so that the extension shaft 6 can be quickly replaced in a confined space.

[0025] Furthermore, a high-temperature spray-welded tungsten-carbon alloy wear-resistant layer 13 is provided on the surface of the spiral blade 2 to increase the overall structural strength and effectively extend the service life of the spiral rod.

[0026] Furthermore, a hard alloy sheet 14 aligned with the spiral direction is embedded inside the spiral blade 2, which increases the deformation resistance of the spiral blade 2, prevents the spiral blade 2 from deforming and being damaged, and extends the service life of the spiral rod.

[0027] Furthermore, the diameter of the spiral blade 2 is 300mm to 1000mm, and the pitch of the spiral blade 2 is 200mm to 300mm.

[0028] In this embodiment, the screw rod for a sand mixer is designed with separate components for the rotating shaft 1 and the screw blade 2. This allows for quick replacement of the screw blade 2 after wear, eliminating the need for complete replacement and effectively saving maintenance costs. An extension shaft 6 is installed at the outlet end of the rotating shaft 1, with inclined stirring rods 8 and branch rods 7 mounted on it. This effectively breaks up clumps of sand as they pass through, ensuring the sand from the screw feeder is loose. This facilitates uniform mixing of the components in the molding sand by the subsequent sand mixer, effectively improving the quality of the molded sand. Simultaneously, a wear-resistant weld overlay layer 5 is provided on the edge of the screw blade 2, effectively increasing its wear resistance and reducing wear. A high-temperature sprayed tungsten-carbon alloy wear-resistant layer 13 is applied to the surface of the screw blade 2, increasing overall structural strength and effectively extending the service life of the screw rod. This screw rod for a sand mixer is not only simple in structure but also easy to maintain, install, and clean, and it helps improve the quality of the molding sand, making it convenient and highly practical.

[0029] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several modifications and improvements can be made without departing from the structure of the present utility model. These modifications and improvements will not affect the effectiveness of the present utility model or the practicality of the patent.

Claims

1. A screw for a sand mixer, characterized in that, The utility model provides a kind of spiral blade stirring device, including rotating shaft (1), the rotating shaft (1) is equipped with detachable spiral blade (2), the spiral blade (2) is equipped with multiple connecting blocks (3), the connecting block (3) is arranged in every segment spiral blade (2) both sides, the connecting block (3) is installed on rotating shaft (1) by locking bolt (4), the rotating shaft (1) one end is equipped with extension shaft (6), the extension shaft (6) is equipped with multiple obliquely arranged stirring rods (8), the stirring rod (8) is evenly arranged in the outer surface of extension shaft (6), the stirring rod (8) is equipped with branch stick (7) being arranged in spiral, locking piece is equipped between the extension shaft (6) and rotating shaft (1).

2. A screw for a sand mixer according to claim 1, characterized in that The both sides surface of the spiral blade (2) is equipped with multiple evenly distributed convex blocks (12).

3. A screw for a sand mixer according to claim 1, wherein The outermost spiral edge of the spiral blade (2) is equipped with wear-resistant hardfacing layer (5), and the wear-resistant hardfacing layer (5) is connected with the spiral blade (2) by welding.

4. A screw for a sand mixer according to claim 1, wherein The locking piece includes first magnet block (10), second magnet block (9) and multiple locking screws (11), one end of the extension shaft (6) is provided with connecting hole (16), one end of the rotating shaft (1) is provided with connecting shaft (15), the connecting shaft (15) is inserted into the connecting hole (16), the first magnet block (10) is arranged on one end of the connecting shaft (15), the second magnet block (9) is arranged on the bottom of the connecting hole (16), and the locking screw (11) is screwed with the connecting shaft (15) through the extension shaft (6).

5. A screw for a sand mixer according to claim 1, wherein The surface of the spiral blade (2) is provided with a high-temperature sprayed tungsten-carbide alloy wear-resistant layer (13).

6. A screw for a sand mixer according to claim 1, wherein The spiral blade (2) is embedded with a hard alloy piece (14) consistent with the spiral direction thereof.

7. A screw for a sand mixer according to claim 1, wherein The diameter of the spiral blade (2) is 300mm-1000mm, and the pitch of the spiral blade (2) is 200-300mm.

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