Rake tooth precision casting forming device

Abstract

The utility model provides a rake tooth precision casting forming device, and relates to the technical field of rake tooth casting. Comprising a shell arranged on the inner top wall of the treatment barrel, a rotating shaft rotationally arranged on the inner top wall of the shell and penetrating through the bottom of the shell to extend downwards, and a plurality of curved bars arranged on the rotating shaft and located on the outer bar wall of the shell. The sealing gasket is arranged at one end, far away from the rotating shaft, of the curved bar and is matched with a discharging opening of the feeding pipe; the intermittent assembly is arranged in the shell and is used for driving the rotating shaft to intermittently rotate; and the stirring mechanism is arranged in the treatment barrel. According to the precoated sand manufactured by adopting the neutral sand as the crude sand, auxiliary materials such as the resin, the curing agent and the lubricating agent can be uniformly mixed with the neutral sand, so that the precoated sand is used for preparing the rake tooth, a mold core for manufacturing an assembly hole cannot be greatly expanded, and the phenomenon of sand burning caused by serious sintering due to high-temperature contact of molten steel is also avoided; therefore, the rake tooth preparation effect is improved.

Description

Technical Field

[0001] This utility model relates to the field of rake tooth casting technology, and more specifically, to a rake tooth precision casting forming device. Background Technology

[0002] In recent years, with the vigorous development of port construction and land reclamation both domestically and internationally, the dredging industry has experienced rapid growth. To meet market demand, dredging companies have built many trailing suction hopper dredgers. The rake teeth, as a key wear component of these dredgers, directly affect their efficiency due to their service life. Besides the wear resistance of the materials used, the service life of the rake teeth is often affected by inaccurate fit between the teeth and the tooth holder, leading to tooth loss and abnormal failure.

[0003] The preparation of rake teeth requires the use of coated sand as raw material. Traditional coated sand is generally acidic sand. When acidic sand is heated to high temperature and undergoes multiple phase transformations and expansions, its expansion rate is too high. Therefore, the core for making the assembly hole will expand significantly, which will have a significant impact on the dimensional accuracy of the rake tooth assembly hole. In addition, because acidic sand has very low refractoriness, it will cause severe high-temperature contact sintering of molten steel, resulting in physical sand adhesion. Utility Model Content

[0004] The purpose of this invention is to address the problem that coated sand is prone to expansion due to multiple phase changes at high temperatures, which in turn causes the core used to make the assembly holes to expand significantly, thus greatly affecting the dimensional accuracy of the rake tooth assembly holes.

[0005] To achieve the above-mentioned objectives, this utility model provides the following technical solution:

[0006] A precision casting and forming device for rake teeth includes a processing tank, a plurality of feed pipes disposed at the top edge of the processing tank, and a feed cylinder disposed at the top of the feed pipes, and further includes:

[0007] A blocking mechanism, comprising a housing disposed on the top wall of the processing tank, a rotating shaft rotatably disposed on the top wall of the housing and extending downward through the bottom of the housing, a plurality of curved rods disposed on the outer wall of the rotating shaft located on the outer wall of the housing, a sealing gasket disposed at the end of the curved rods away from the rotating shaft and cooperating with the feed inlet of the feed pipe, and an intermittent assembly disposed inside the housing for driving the rotating shaft to rotate intermittently; and

[0008] A stirring mechanism is installed inside the processing tank and is used to mix and crush the raw materials fed into the processing tank.

[0009] As a preferred technical solution of this application, the intermittent component includes a first motor disposed on the top wall of the housing, an incomplete gear disposed on the output shaft of the first motor, and a complete gear disposed on the shaft located inside the housing and meshing with the incomplete gear.

[0010] As a preferred technical solution of this application, the agitation mechanism includes a box body disposed at the bottom of the processing tank, a rotating rod rotatably disposed at the top of the box body and extending through the top of the box body into the processing tank, a rotating cylinder rotatably disposed at the top of the box body and rotatably sleeved outside the rotating rod, a spiral blade disposed on the outer wall of the rotating rod and the rotating cylinder located inside the processing tank, and a rotating assembly disposed inside the box body for driving the rotating rod and the rotating cylinder to reverse relative to each other.

[0011] As a preferred technical solution of this application, the rotating assembly includes a second motor disposed on the outer wall of the housing, a driving bevel gear disposed on the output shaft of the second motor, and a driven bevel gear disposed on the inner outer wall of the rotating rod and the rotating cylinder and meshing with the driving bevel gear.

[0012] As a preferred technical solution of this application, the bottom of the processing tank is further provided with a support assembly, which includes a support frame, a third motor disposed on the outer wall of the support frame, and rotating columns disposed on the side walls at both ends of the processing tank, wherein one of the rotating columns is connected to the output shaft of the third motor.

[0013] As a preferred technical solution of this application, the support frame is provided with U-shaped plates on both sides of the top. A torsion spring shaft is rotatably connected to the inner wall of the U-shaped plate. A movable plate is sleeved on the torsion spring shaft. Several swing rods are provided on the top of the movable plate. Several rubber balls are provided on the wall of the swing rods.

[0014] As a preferred technical solution of this application, a heater is provided at the bottom of the processing tank, and a sealing plate is snapped onto the side wall of the processing tank.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] 1. First, neutral sand is added to the treatment tank as raw sand. Then, the raw sand inside the treatment tank is heated. After that, resin, curing agent, lubricant and other auxiliary materials are added to the treatment tank through several feeding cylinders and mixed with the neutral sand. Then, the molten resin will coat the surface of the raw sand particles to form coated sand. Finally, it is crushed and cooled. This coated sand can be used as raw material to prepare rake heads. The core for making assembly holes will not expand too much due to the high expansion rate. Moreover, because of its high refractory properties, it will not cause severe high-temperature contact sintering of molten steel and sand adhesion, thus improving the effect of rake tooth preparation.

[0017] 2. When resin, curing agent, and lubricant are added to the treatment tank and mixed with neutral sand, the blocking mechanism activates the first motor. This motor, along with incomplete and complete gears, a rotating shaft, and a crankshaft, drives several sealing gaskets to rotate intermittently. This sequentially blocks and releases the outlet of the feed cylinder containing the resin, curing agent, and lubricant, allowing the resin, curing agent, and lubricant to be added to the treatment tank intermittently and layer by layer. This improves the mixing effect of the raw materials, facilitating the preparation of qualified coated sand and the subsequent preparation of rake teeth.

[0018] 3. Through the set stirring mechanism, when the resin, curing agent and lubricant are intermittently added to the treatment tank and mixed with neutral sand, the second motor can also be started. Through the set active bevel gear and driven bevel gear, the rotating rod and rotating drum can be driven to reverse relative to each other, thereby driving the spiral blades on the rotating rod and rotating drum to reverse relative to each other, stirring the mixed raw materials from two directions, which facilitates more thorough mixing of the raw materials. Moreover, after the raw materials are mixed and cooled, the spiral blades can continue to be controlled to rotate to crush the raw materials. Attached Figure Description

[0019] Figure 1 This is an overall structural diagram of the present invention;

[0020] Figure 2 This is a bottom view of the structure of this utility model;

[0021] Figure 3 This is a front view of the present invention;

[0022] Figure 4 This is a cross-sectional structural diagram of the present invention;

[0023] Figure 5 This is a structural diagram of the blocking mechanism of this utility model;

[0024] Figure 6 This is a structural diagram of the intermittent component of this utility model;

[0025] Figure 7 This is a structural diagram of the stirring mechanism of this utility model.

[0026] The image shows:

[0027] 1. Processing tank; 101. Heater; 102. Sealing plate; 2. Feed pipe; 201. Feed cylinder; 3. Shell; 4. Crank rod; 401. Sealing gasket; 5. First motor; 501. Incomplete gear; 6. Rotating shaft; 601. Complete gear; 7. Box; 8. Rotating rod; 9. Rotating cylinder; 10. Spiral blade; 11. Second motor; 1101. Driving bevel gear; 12. Driven bevel gear; 13. Support frame; 14. Third motor; 1401. Rotating column; 15. U-shaped plate; 16. Torsion spring shaft; 17. Movable plate; 18. Swing rod; 1801. Rubber ball. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model.

[0029] like Figures 1 to 4 As shown, this embodiment proposes a precision casting molding device for rake teeth, including a processing tank 1, a plurality of feed pipes 2 disposed at the top edge of the processing tank 1, and a feed cylinder 201 disposed at the top of the feed pipes 2. It also includes a blocking mechanism and a stirring mechanism. The blocking mechanism is disposed inside the processing tank 1 and is used to intermittently block the plurality of feed pipes 2. The stirring mechanism is disposed inside the processing tank 1 and is used to mix and crush the raw materials fed into the processing tank 1. A heater 101 is provided at the bottom of the processing tank 1, and a sealing plate 102 is snapped onto the side wall of the processing tank 1.

[0030] First, neutral sand is added to the processing tank as raw sand. Then, the raw sand inside the processing tank 1 is heated to 100-150 degrees Celsius by the heater 101. Then, resin, curing agent, lubricant and other auxiliary materials are added to the processing tank 1 through several feed cylinders 201 to mix with the neutral sand. At this time, the discharge end of each feed cylinder 201 can be intermittently blocked by the set blocking mechanism, so that the raw materials can be intermittently added to the processing tank 1 and mixed together, improving the mixing effect. Moreover, the set stirring mechanism can stir the raw materials in two directions, thereby further increasing the mixing speed of the raw materials. Afterwards, the molten resin will coat the surface of the raw sand particles to form coated sand. Finally, it is crushed and cooled, and the sealing plate 102 is opened to remove the raw materials. Thus, the coated sand can be used as raw material to prepare rake heads. The core for making assembly holes will not expand too much due to excessive expansion rate. Moreover, because of its high refractory properties, it will not cause severe high-temperature contact sintering of molten steel and sand adhesion, thereby improving the effect of rake tooth preparation.

[0031] like Figure 5 and Figure 6As shown, in a preferred embodiment, based on the above method, the blocking mechanism further includes a housing 3 disposed on the top wall of the processing tank 1, a rotating shaft 6 rotatably disposed on the top wall of the housing 3 and extending downward through the bottom of the housing 3, a plurality of curved rods 4 disposed on the outer rod wall of the rotating shaft 6 located on the outer rod wall of the housing 3, a sealing gasket 401 disposed on the end of the curved rod 4 away from the rotating shaft 6 and cooperating with the discharge port of the feed pipe 2, and an intermittent component disposed inside the housing 3 for driving the rotating shaft 6 to rotate intermittently.

[0032] The intermittent assembly includes a first motor 5 disposed on the top wall inside the housing 3, an incomplete gear 501 disposed on the output shaft of the first motor 5, and a complete gear 601 disposed on the rotating shaft 6 located inside the housing 3 and meshing with the incomplete gear 501.

[0033] First, resin, curing agent, and lubricant are added to each feed cylinder 201. The raw materials enter the processing tank 1 through the feed pipe 2. At this time, the first motor 5 can be started to drive the incomplete gear 501 connected to its output end to rotate. When the incomplete gear 501 rotates to the toothed side and contacts the complete gear 601, it will drive the complete gear 601 and the rotating shaft 6 to rotate. When the incomplete gear 501 rotates to the toothless side and contacts the complete gear 601, the complete gear 601 will lose power and stop from rotating shaft 6. Therefore, the continuous rotation of the incomplete gear 501 will drive the complete gear 601 and the rotating shaft 6 to rotate intermittently. Thus, the rotating shaft 6 will drive several cranks 4 and sealing gaskets 401 to rotate intermittently, thereby blocking and releasing each feed pipe 2 in turn, so that the raw materials in each feed cylinder 201 can enter the processing tank 1 intermittently. At this time, the various raw materials will be mixed together layer by layer, so that the raw materials can be mixed more thoroughly.

[0034] like Figure 4 and Figure 7 As shown, in a preferred embodiment, based on the above method, the agitation mechanism further includes a housing 7 disposed at the bottom of the processing tank 1, a rotating rod 8 rotatably disposed at the top of the housing 7 and extending through the top of the housing 7 into the interior of the processing tank 1, a rotating cylinder 9 rotatably disposed at the top of the housing 7 and rotatably sleeved outside the rotating rod 8, a spiral blade 10 disposed on the outer wall of the rotating rod 8 and the rotating cylinder 9 located inside the processing tank 1, and a rotating assembly disposed inside the housing 7 for driving the rotating rod 8 and the rotating cylinder 9 to reverse relative to each other.

[0035] The rotating assembly includes a second motor 11 disposed on the outer wall of the housing 7, a driving bevel gear 1101 disposed on the output shaft of the second motor 11, and a driven bevel gear 12 disposed on the inner outer wall of the rotating rod 8 and the rotating cylinder 9 and meshing with the driving bevel gear 1101.

[0036] After the raw materials are intermittently fed into the processing tank 1, the second motor 11 can be started to drive the active bevel gear 1101 connected to its output end to rotate. The active bevel gear 1101 will drive the rotating rod 8 and the rotating drum 9 equipped with the driven bevel gear 12 to rotate in opposite directions. Therefore, the spiral blades 10 on the rotating rod 8 and the rotating drum 9 can rotate in opposite directions to stir the raw materials in the processing tank 1 from two different directions, thereby further improving the mixing effect of the raw materials. After the raw materials are mixed, they are cooled, and then the cooled raw materials can be crushed by the rotating spiral blades 10 to facilitate the subsequent preparation of the rake teeth.

[0037] like Figure 1 , Figure 2 and Figure 3 As shown, in a preferred embodiment, based on the above method, the bottom of the processing tank 1 is further provided with a support assembly. The support assembly includes a support frame 13, a third motor 14 disposed on the outer wall of the support frame 13, and rotating columns 1401 disposed on the side walls at both ends of the processing tank 1. One rotating column 1401 is connected to the output shaft of the third motor 14.

[0038] The support frame 13 has U-shaped plates 15 on both sides of the top. A torsion spring shaft 16 is rotatably connected to the inner wall of the U-shaped plate 15. A movable plate 17 is sleeved on the torsion spring shaft 16. Several swing rods 18 are provided on the top of the movable plate 17. Several rubber balls 1801 are provided on the wall of the swing rods 18.

[0039] After the raw materials are mixed and cooled, the third motor 14 can be started to drive the processing barrel 1 to swing back and forth through the rotating column 1401, which facilitates shaking the raw materials in the processing barrel 1. Moreover, the shaking processing barrel 1 will continuously collide with the rubber ball 1801 on the swing arm 18, which will cause the processing barrel 1 to vibrate. After being impacted, the swing arm 18 will rotate and reset through the torsion spring shaft 16 and the movable plate 17. Therefore, during the shaking and vibration process, some of the raw materials adhering to its inner wall will be shaken off, which will facilitate the crushing of the raw materials by the spiral blade 10.

[0040] The working principle of this utility model is as follows: First, neutral sand is added to the processing tank as raw sand. Then, the raw sand inside the processing tank 1 is heated to 100-150 degrees Celsius by the heater 101. Then, resin, curing agent, and lubricant are added to each feed cylinder 201 respectively. The raw materials will enter the processing tank 1 through the feed pipe 2. At this time, the first motor 5 can be started to drive the incomplete gear 501 connected to its output end to rotate. When the incomplete gear 501 rotates to the point where its toothed side contacts the complete gear 601, it will drive the complete gear 601 and the rotating shaft 6 to rotate. When the complete gear 501 rotates to the point where its toothless side contacts the complete gear 601, the complete gear 601 loses power and stops from rotating shaft 6. Therefore, the continuous rotation of the incomplete gear 501 will cause the complete gear 601 and rotating shaft 6 to rotate intermittently. As a result, the rotating shaft 6 will cause several cranks 4 and sealing gaskets 401 to rotate intermittently, thereby blocking and releasing each feed pipe 2 in sequence, allowing the raw materials in each feed cylinder 201 to enter the processing tank 1 intermittently. At this time, various raw materials will be mixed together layer by layer, thereby enabling each raw material to be mixed more thoroughly with the neutral sand. Furthermore, after each raw material is intermittently added to the processing tank 1, the second motor 11 can be started to drive the active bevel gear 1101 connected to its output end to rotate. The active bevel gear 1101 will drive the rotating rod 8 and the rotating drum 9 equipped with the driven bevel gear 12 to rotate in opposite directions. Therefore, the spiral blades 10 on the rotating rod 8 and the rotating drum 9 can rotate in opposite directions to stir the raw materials in the processing tank 1 from two different directions, thereby further improving the mixing effect of the raw materials. After the raw materials are mixed, the raw materials are cooled, and then the cooled raw materials can be crushed by the rotating spiral blades 10 to facilitate the subsequent preparation of the rake teeth.

[0041] The above embodiments are only used to illustrate the present utility model and are not intended to limit the technical solutions described in the present utility model. Although the present utility model has been described in detail with reference to the above embodiments, the present utility model is not limited to the specific embodiments described above. Therefore, any modifications or equivalent substitutions to the present utility model, and all technical solutions and improvements that do not depart from the spirit and scope of the invention, are covered within the scope of the claims of the present utility model.

Claims

1. A precision casting forming device for rake teeth, comprising a processing barrel (1), a plurality of feed pipes (2) disposed at the top edge of the processing barrel (1), and a feed cylinder (201) disposed at the top of the feed pipes (2), characterized in that, Also includes: The blocking mechanism includes a housing (3) disposed on the top wall of the processing tank (1), a rotating shaft (6) rotatably disposed on the top wall of the housing (3) and extending downward through the bottom of the housing (3), a plurality of curved rods (4) disposed on the outer rod wall of the rotating shaft (6) located on the outer rod wall of the housing (3), a sealing gasket (401) disposed on the end of the curved rod (4) away from the rotating shaft (6) and cooperating with the discharge port of the feed pipe (2), and an intermittent assembly disposed inside the housing (3) for driving the rotating shaft (6) to rotate intermittently; and A stirring mechanism is provided inside the processing tank (1) for mixing and crushing the raw materials fed into the processing tank (1).

2. The precision casting and forming device for rake teeth according to claim 1, characterized in that, The intermittent assembly includes a first motor (5) disposed on the top wall inside the housing (3), an incomplete gear (501) disposed on the output shaft of the first motor (5), and a complete gear (601) disposed on the rotating shaft (6) inside the housing (3) and meshing with the incomplete gear (501).

3. The precision casting and forming device for rake teeth according to claim 1, characterized in that, The agitation mechanism includes a housing (7) located at the bottom of the processing tank (1), a rotating rod (8) rotatably located at the top of the housing (7) and extending through the top of the housing (7) into the processing tank (1), a rotating cylinder (9) rotatably located at the top of the housing (7) and rotatably sleeved outside the rotating rod (8), a spiral blade (10) located on the outer wall of the rotating rod (8) and the rotating cylinder (9) inside the processing tank (1), and a rotating assembly located inside the housing (7) for driving the rotating rod (8) and the rotating cylinder (9) to rotate in opposite directions.

4. The precision casting and forming device for rake teeth according to claim 3, characterized in that, The rotating assembly includes a second motor (11) disposed on the outer wall of the housing (7), a driving bevel gear (1101) disposed on the output shaft of the second motor (11), and a driven bevel gear (12) disposed on the inner outer wall of the rotating rod (8) and the rotating cylinder (9) and meshing with the driving bevel gear (1101).

5. The precision casting and forming device for rake teeth according to claim 1, characterized in that, The bottom of the processing tank (1) is also provided with a support assembly, which includes a support frame (13), a third motor (14) disposed on the outer wall of the support frame (13), and rotating columns (1401) disposed on the side walls at both ends of the processing tank (1). One of the rotating columns (1401) is connected to the output shaft of the third motor (14).

6. The precision casting and forming device for rake teeth according to claim 5, characterized in that, The support frame (13) has U-shaped plates (15) on both sides of the top. The inner wall of the U-shaped plate (15) is rotatably connected to a torsion spring shaft (16). A movable plate (17) is sleeved on the torsion spring shaft (16). The top of the movable plate (17) is provided with several swing rods (18). Several rubber balls (1801) are provided on the wall of the swing rods (18).

7. The precision casting and forming device for rake teeth according to claim 1, characterized in that, The bottom of the processing tank (1) is equipped with a heater (101), and a sealing plate (102) is snapped onto the side wall of the processing tank (1).

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