Precoated sand uniform distributing and forming structure for cast steel

Abstract

The utility model relates to the technical field of precoated sand forming devices, and discloses a structure for uniformly distributing and forming precoated sand for steel casting, which comprises a forming bottom die and a forming top die, the side wall of the forming bottom die is fixedly connected with a fixed table, the bottom of the fixed table is provided with a shock insulation foot stool, and the top of the fixed table is connected with a hydraulic mechanism through four supporting columns. A vibrating plate is fixedly installed at the output end of the hydraulic mechanism through a shock insulation connecting disc, a connecting frame at the bottom of the vibrating plate is connected with a forming top die, an ejection mechanism is fixedly connected to the bottom of the forming bottom die, the output end of the ejection mechanism is in butt joint with a cavity of the forming bottom die, and the vibrating plate slidably sleeves the side walls of the four supporting columns; according to the precoated sand forming device, precoated sand injected into the forming structure can vibrate through the vibration plate, the precoated sand can be evenly distributed in the forming bottom die and the forming top die under the vibration effect, defective products of the formed precoated sand are avoided, and in addition, the precoated sand can be more compact under the vibration effect.

Description

Technical Field

[0001] The utility model relates to the technical field of coated sand molding devices, and more specifically to a uniform distribution and molding structure of coated sand for steel casting. Background Art

[0002] Coated sand is a type of molding sand or core sand that has a layer of solid resin film on the surface of the sand particles. This material is prepared before molding and core making. It mainly uses quartz sand as the raw sand, and adds thermoplastic phenolic resin, hexamethylenetetramine and reinforcing agent as raw materials. Coated sand has the characteristics of high strength, low gas generation, low expansion, good fluidity, good demoulding properties, and good anti-sand adhesion, and is suitable for the production of steel castings and iron castings.

[0003] There are some defects in the coated sand molding process: first, the coated sand must be filled into the molding structure first, but the coated sand is unevenly distributed during the filling process, affecting the product quality; second, after the coated sand hardens in the molding structure, it is relatively compact in the cavity of the molding structure, making it difficult to unload. Utility Model Content

[0004] In order to overcome the above defects of the prior art, the utility model provides a uniform distribution and molding structure of coated sand for cast steel, so as to solve the problems of uneven distribution of coated sand in the molding structure and difficulty in unloading of coated sand after molding in the above background technology.

[0005] The utility model provides the following technical solutions: a uniform distribution and molding structure of coated sand for cast steel, comprising a molding bottom mold and a molding top mold, the side wall of the molding bottom mold is fixedly connected with a fixed platform, a seismic isolation footrest is arranged at the bottom of the fixed platform, the top of the fixed platform is connected with a hydraulic mechanism through four support columns, a vibration plate is fixedly installed at the output end of the hydraulic mechanism through a seismic isolation connecting plate, the bottom connecting frame of the vibration plate is connected to the molding top mold, the bottom of the molding bottom mold is fixedly connected with an ejection mechanism, the output end of the ejection mechanism is connected to the molding bottom mold cavity, and the vibration plate is slidably sleeved on the side walls of the four support columns.

[0006] Furthermore, an inner groove is provided at the bottom of the molding bottom mold, and a plurality of column holes connected to the inner cavity of the molding bottom mold are provided at the top of the inner groove. The ejection mechanism includes a movable disk and a fixed shell. The fixed shell is fixedly connected to the bottom of the molding bottom mold, and an electric cylinder is fixedly installed on the bottom of the fixed shell. The output shaft of the electric cylinder passes through the fixed shell and is connected to the movable disk. The movable disk is slidably sleeved inside the inner groove. A plurality of ejection rods are fixedly connected to the top of the movable disk, and the plurality of ejection rods are respectively inserted into the plurality of column holes.

[0007] Furthermore, the movable plate is composed of a top plate and a bottom plate, the top plate is located on the top of the bottom plate, and the size of the top plate is larger than the size of the bottom plate, and the side wall of the movable plate is slidably sleeved with a positioning frame, and the positioning frame is fixedly connected to the bottom of the molding bottom mold.

[0008] Furthermore, the shape of the top ends of the plurality of ejector rods matches the shape of the inner wall of the molding bottom mold cavity.

[0009] Furthermore, the vibration plate includes a main board body, and a vibration motor is fixedly installed on the top of the main board body.

[0010] Furthermore, a seismic isolation rubber ring is provided at the connection between the vibration plate and the four support columns.

[0011] Furthermore, the seismic isolation bracket includes two supporting foot plates, a horizontal plate is arranged on the top of the supporting foot plates, a rubber seismic isolation pad is fixedly installed on the top of the horizontal plate, a plurality of through-holes are arranged on the top of the horizontal plate and the rubber seismic isolation pad, and plug posts are slidably sleeved in the plurality of through-holes, and the bottom end of the plug post is located at the bottom of the horizontal plate and is fixedly connected to a lifting plate.

[0012] Furthermore, the seismic isolation connecting plate includes a shell, an inner plate is movably sleeved inside the shell, a rubber seismic isolation plate is fixedly connected to the bottom of the inner plate, the shell is fixedly connected to the top of the vibration plate, a hole is opened on the top of the shell that penetrates to the interior, and the output end of the hydraulic mechanism passes through the hole and is fixedly connected to the top of the inner plate.

[0013] Technical effects and advantages of the utility model:

[0014] The utility model can make the coated sand injected into the molding structure vibrate by providing a vibration plate, and the coated sand can be evenly distributed in the molding bottom mold and the molding top mold under the vibration effect, so as to avoid the occurrence of defective coated sand after molding. In addition, the coated sand can be made more compact under the vibration effect, so as to improve the quality of the coated sand product after molding.

[0015] When the coated sand is formed, it is in the molding bottom mold cavity. At this time, the ejection mechanism can be operated to enable a number of ejector rods to enter the molding bottom mold cavity to lift the formed coated sand upward, so that the coated sand can be separated from the molding bottom mold cavity, thereby completing automatic unloading and solving the problem of difficult unloading. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 It is an exploded schematic diagram of the overall structure of the utility model;

[0018] Figure 3 For this utility model Figure 2 Schematic diagram of the ejection mechanism structure;

[0019] Figure 4 For this utility model Figure 2 Schematic diagram of the vibration plate structure;

[0020] Figure 5 For this utility model Figure 2 Schematic diagram of the seismic isolation stand structure;

[0021] Figure 6 For this utility model Figure 2 Schematic diagram of the seismic isolation connection plate structure.

[0022] The accompanying drawings are marked as follows: 1. fixed table; 2. molding bottom mold; 3. molding top mold; 4. ejector mechanism; 5. support column; 6. hydraulic mechanism; 7. vibration plate; 8. connecting frame; 9. seismic isolation foot frame; 10. seismic isolation connecting plate; 21. inner groove; 41. movable plate; 42. ejector rod; 43. positioning column; 44. fixed shell; 45. electric cylinder; 46. positioning frame; 411. top plate; 412. bottom plate; 71. main board; 72. vibration motor; 91. supporting foot plate; 92. horizontal plate; 93. rubber seismic isolation pad; 94. plug column; 95. lifting plate; 101. casing; 102. inner plate; 103. rubber seismic isolation plate. DETAILED DESCRIPTION

[0023] The specific implementation of the utility model is described in detail below with reference to the accompanying drawings.

[0024] Reference Figure 1 and Figure 2 The utility model provides a uniform distribution and molding structure of coated sand for cast steel, including a molding bottom mold 2 and a molding top mold 3. The side wall of the molding bottom mold 2 is fixedly connected with a fixed platform 1, and a shock-isolating footrest 9 is arranged at the bottom of the fixed platform 1. The top of the fixed platform 1 is connected with a hydraulic mechanism 6 through four support columns 5. The output end of the hydraulic mechanism 6 is fixedly installed with a vibration plate 7 through a shock-isolating connecting plate 10. The bottom connecting frame 8 of the vibration plate 7 is connected to the molding top mold 3. The bottom of the molding bottom mold 2 is fixedly connected with an ejection mechanism 4, and the output end of the ejection mechanism 4 is connected to the cavity of the molding bottom mold 2. The vibration plate 7 is slidably sleeved on the side walls of the four support columns 5.

[0025] Reference Figure 3An inner groove 21 is provided at the bottom of the molding bottom mold 2, and a plurality of column holes communicating with the inner cavity of the molding bottom mold 2 are provided at the top of the inner groove 21. The ejection mechanism 4 includes a movable disk 41 and a fixed shell 44. The fixed shell 44 is fixedly connected to the bottom of the molding bottom mold 2, and an electric cylinder 45 is fixedly installed at the bottom of the fixed shell 44. The output shaft of the electric cylinder 45 passes through the fixed shell 44 and is connected to the movable disk 41. The movable disk 41 is slidably sleeved inside the inner groove 21, and a plurality of ejector rods 42 are fixedly connected to the top of the movable disk 41. The plurality of ejector rods 42 are respectively inserted into the plurality of column holes. When the ejection mechanism 4 is running, the output of the electric cylinder 45 drives the movable disk 41 to move upward, so that the plurality of ejector rods 42 move upward and pass through the column holes into the cavity of the molding bottom mold 2, thereby the molding coated sand in the cavity of the molding bottom mold 2 can be ejected through the top of the plurality of ejector rods 42 to complete the automatic unloading process.

[0026] Reference Figure 3 The movable plate 41 is composed of a top plate 411 and a bottom plate 412. The top plate 411 is located on the top of the bottom plate 412, and the size of the top plate 411 is larger than the size of the bottom plate 412. The side wall of the movable plate 41 is slidably sleeved with a positioning frame 46, and the positioning frame 46 is fixedly connected to the bottom of the molding bottom mold 2. The positioning frame 46 cooperates with the structure of the movable plate 41 to limit the downward position of the movable plate 41 to achieve a positioning effect, thereby preventing the ejector rod 42 from moving down too much in the column hole, causing the coated sand in the cavity of the molding bottom mold 2 to enter the column hole, and forming convex spots on the outer surface after molding.

[0027] Reference Figure 3 The top shapes of the plurality of ejector rods 42 match the inner wall shape of the cavity of the molding bottom mold 2 to ensure the flatness of the outer surface of the coated sand after molding.

[0028] Reference Figure 4 The vibration plate 7 includes a main board body 71 , and a vibration motor 72 is fixedly installed on the top of the main board body 71 . The vibration motor 72 is provided to enable the vibration plate 7 to achieve a vibration effect.

[0029] Reference Figure 2 A seismic isolation rubber ring is provided at the connection between the vibration plate 7 and the four support columns 5 to prevent the vibration force of the vibration plate 7 from being transmitted to the support columns 5 and affecting the hydraulic mechanism 6.

[0030] Reference Figure 5 The seismic isolation frame 9 includes two supporting foot plates 91, a horizontal plate 92 is arranged on the top of the supporting foot plate 91, a rubber seismic isolation pad 93 is fixedly installed on the top of the horizontal plate 92, a plurality of through holes are arranged on the top of the horizontal plate 92 and the rubber seismic isolation pad 93, and a plug column 94 is slidably sleeved in the plurality of through holes, and the bottom end of the plug column 94 is located at the bottom of the horizontal plate 92 and is fixedly connected with a lifting plate 95, so that the equipment is supported by the two supporting foot plates 91, and the seismic isolation effect is achieved by the rubber seismic isolation pad 93.

[0031] Reference Figure 6The seismic isolation connecting plate 10 includes a shell 101, an inner plate 102 is movably sleeved inside the shell 101, a rubber seismic isolation plate 103 is fixedly connected to the bottom of the inner plate 102, the shell 101 is fixedly connected to the top of the vibration plate 7, and a hole is opened on the top of the shell 101 to penetrate to the inside, and the output end of the hydraulic mechanism 6 passes through the hole and is fixedly connected to the top of the inner plate 102. When the output end of the hydraulic mechanism 6 moves downward, it is tightly attached to the top of the vibration plate 7 through the rubber seismic isolation plate 103. At this time, the seismic isolation effect is achieved through the rubber seismic isolation plate 103. When the hydraulic mechanism 6 retracts, the shell 101 is lifted by the inner plate 102, which has a lifting effect on the vibration plate 7.

[0032] The working principle of the utility model is as follows: when in use, the hydraulic mechanism 6 drives the vibration plate 7 to move downward to close the molding top mold 3 and the molding bottom mold 2, and the sandblasting device is used to fill the molding bottom mold 2 and the molding top mold 3 with coated sand. At this time, the vibration plate 7 is operated to vibrate, and the molding bottom mold 2 and the molding top mold 3 are caused to vibrate. At this time, the coated sand filled inside can be evenly distributed inside the molding bottom mold 2 and the molding top mold 3 under the influence of vibration. In this process, the seismic isolation connection plate 10 is used for seismic isolation to prevent the vibration force from affecting the hydraulic mechanism 6, and the seismic isolation tripod 9 can be used to isolate the fixed platform 1 to prevent the vibration force from being transmitted to the ground.

[0033] After the coated sand inside the molding bottom mold 2 and the molding top mold 3 is hardened and formed, the hydraulic mechanism 6 drives the vibration plate 7 to move upward to restore the molding top mold 3 to its position. At this time, the molded coated sand is clamped in the cavity of the molding bottom mold 2, and then the ejection mechanism 4 is operated to output it, which can generate an upward thrust on the molded coated sand in the internal cavity of the molding bottom mold 2. Under the influence of the thrust, the coated sand can be separated from the cavity of the molding bottom mold 2 to complete the unloading.

[0034] The above shows and describes the basic principle, main features and advantages of the utility model. The utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. The utility model may have various changes and improvements without departing from the spirit and scope of the utility model. These changes and improvements fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A uniform distribution and molding structure of coated sand for steel casting, characterized in that: It comprises a molding bottom mold (2) and a molding top mold (3); the side wall of the molding bottom mold (2) is fixedly connected to a fixed platform (1); a shock-isolating footrest (9) is arranged at the bottom of the fixed platform (1); and the top of the fixed platform (1) is connected to a hydraulic mechanism (6) via four support columns (5); The output end of the hydraulic mechanism (6) is fixedly mounted with a vibration plate (7) via a seismic isolation connection plate (10); a bottom connection frame (8) of the vibration plate (7) is connected to a molding top mold (3); and an ejection mechanism (4) is fixedly connected to the bottom of the molding bottom mold (2); The output end of the ejection mechanism (4) is connected to the cavity of the molding bottom mold (2), and the vibration plate (7) is slidably sleeved on the side walls of the four support columns (5).

2. The uniform distribution and molding structure of coated sand for steel casting according to claim 1, characterized in that: The bottom of the molding bottom mold (2) is provided with an inner groove (21), and the top of the inner groove (21) is provided with a plurality of column holes connected with the inner cavity of the molding bottom mold (2); The ejection mechanism (4) comprises a movable plate (41) and a fixed shell (44). The fixed shell (44) is fixedly connected to the bottom of the molding bottom mold (2). An electric cylinder (45) is fixedly installed at the bottom of the fixed shell (44). The output shaft of the electric cylinder (45) passes through the fixed shell (44) and is connected to the movable plate (41). The movable plate (41) is slidably sleeved inside the inner groove (21). A plurality of ejection rods (42) are fixedly connected to the top of the movable plate (41). The plurality of ejection rods (42) are respectively inserted into a plurality of column holes. A plurality of positioning columns (43) are fixedly connected to the top of the inner wall of the inner groove (21). The movable plate (41) is slidably sleeved on the side walls of the plurality of positioning columns (43).

3. The uniform distribution and molding structure of coated sand for steel casting according to claim 2, characterized in that: The movable plate (41) is composed of a top plate (411) and a bottom plate (412). The top plate (411) is located on the top of the bottom plate (412), and the size of the top plate (411) is larger than the size of the bottom plate (412). A positioning frame (46) is slidably sleeved on the side wall of the movable plate (41), and the positioning frame (46) is fixedly connected to the bottom of the molding bottom mold (2).

4. The uniform distribution and molding structure of coated sand for steel casting according to claim 2, characterized in that: The top ends of the plurality of ejector rods (42) are shaped to match the shape of the inner wall of the cavity of the molding bottom mold (2).

5. The uniform distribution and molding structure of coated sand for steel casting according to claim 1, characterized in that: The vibration plate (7) comprises a main board body (71), and a vibration motor (72) is fixedly mounted on the top of the main board body (71).

6. The uniform distribution and molding structure of coated sand for steel casting according to claim 1, characterized in that: A shock-isolating rubber ring is provided at the connection between the vibration plate (7) and the four support columns (5).

7. The uniform distribution and molding structure of coated sand for steel casting according to claim 1, characterized in that: The seismic isolation stand (9) includes two supporting foot plates (91), a horizontal plate (92) is arranged on the top of the supporting foot plate (91), a rubber seismic isolation pad (93) is fixedly installed on the top of the horizontal plate (92), and a plurality of through openings are arranged on the top of the horizontal plate (92) and the rubber seismic isolation pad (93), and a plurality of through openings are slidably sleeved with a plug column (94), and the bottom end of the plug column (94) is located at the bottom of the horizontal plate (92) and is fixedly connected with a lifting plate (95).

8. The uniform distribution and molding structure of coated sand for steel casting according to claim 1, characterized in that: The seismic isolation connecting plate (10) comprises a casing (101), an inner plate (102) being movably sleeved inside the casing (101), a rubber seismic isolation plate (103) being fixedly connected to the bottom of the inner plate (102), the casing (101) being fixedly connected to the top of the vibration plate (7), a hole penetrating to the interior is provided at the top of the casing (101), and an output end of the hydraulic mechanism (6) is fixedly connected to the top of the inner plate (102) through the hole.

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