A dipping device for casting pipe socket sand core

Abstract

A coating device for a socket sand core of a cast pipe comprises two hangers and a paint bucket placed on a reference plane, a crossbeam is rotatably installed between the bottom ends of the two hangers; a mounting frame is connected to the bottom of the crossbeam through a fixed column, at least one clamp is installed at the bottom of the mounting frame, and the clamp can be elastically squeezed and fixed with the inner cavity of the socket sand core; a floating plate is arranged in the paint bucket, and the floating plate can float on the upper end surface of the paint, a plurality of limiting columns are vertically arranged on the inner wall of the paint bucket, and the two ends of the floating plate are located between the limiting columns, and the edge of the floating plate can be limited in the horizontal plane. By arranging a floating plate in the paint bucket, when the socket sand core is driven to move downward in the paint bucket, the floating plate can block the bottom of the sand core, and can move downward with the sand core under the action of the limiting column, and the bottom of the sand core is sealed at all times, so that materials can be prevented from entering the inner cavity of the sand core, and the use of the sand core whose inner cavity does not need to be dipped is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of socket sand core manufacturing, in particular to a dipping device for a cast pipe socket sand core. Background Art

[0002] The socket sand core is a supporting structure, mainly used for complex shapes and spaces such as cavities, blind holes, through holes, etc. in castings. The socket sand core usually uses a tube mold and a sand core external structure mounted on the socket end of the tube mold to form a cavity. The sand core is usually made of synthetic sand or resin sand piled up in the mold cavity. After hardening, the mold is opened for coring, dipping, stacking and other processes. A dipping device is required for dipping. Usually, a hanger is used to take out the sand core from the core shooting machine, and then it is transferred to the paint bucket for dipping.

[0003] For example, Chinese patent number CN117463966A discloses a ductile iron pipe socket sand core clamping device, which is driven by a clamping drive device 120 to open outward through a moving claw 140, and is fixed in cooperation with the inner wall of the ductile iron pipe socket sand core 200. The dipping pool lifting device 530 drives the dipping pool 520 to rise, and the coating in the dipping pool 520 contacts the ductile iron pipe socket sand core 200, so that the dipping work can be completed. However, there are many problems in use. On the one hand, the structure of the moving claw cooperating with the clamping drive device is relatively complicated, and the manufacturing difficulty and maintenance cost are high. In addition, the inner diameter of the socket sand core is easily worn during the clamping process of the moving claw. On the other hand, during the dipping process, the dipping liquid will enter the inner ring of the socket sand core, and the dipping difficulty is relatively large for the socket sand core whose inner ring does not need to be dipped. Utility Model Content

[0004] In order to solve the technical problems existing in the above-mentioned background technology, the utility model provides a dipping device for a cast pipe socket sand core.

[0005] The technical solution of this utility model is as follows:

[0006] A coating device for a cast pipe socket sand core comprises two hangers and a coating bucket placed on a reference plane, the two hangers can be moved horizontally and vertically to above the coating bucket, and a crossbeam is rotatably installed between the bottom ends of the two hangers;

[0007] The bottom of the crossbeam is connected to a mounting frame through a fixing column, and at least one clamp is installed at the bottom of the mounting frame, and the clamp can be elastically squeezed and fixed with the inner cavity of the socket sand core;

[0008] A floating plate is arranged in the paint bucket, and the floating plate can float on the upper end surface of the paint. A plurality of limiting columns are vertically arranged on the inner wall of the paint bucket, and the two ends of the floating plate are located between the limiting columns, which can limit the edge of the floating plate in the horizontal plane.

[0009] The installation method of the limiting column is that a plurality of U-shaped frames are installed on the edge of the paint bucket corresponding to the limiting column buckles, and the U-shaped frames are fixed to the paint bucket through fasteners, and the limiting columns are fixedly installed on the sides of the U-shaped frames.

[0010] The fastener is specifically designed as follows: the fastener adopts a bolt and nut combination, and the bolt passes through the U-shaped plate and the edge of the paint bucket and is fixed by the nut.

[0011] The specific design of the limiting column is that four limiting columns are provided, and the center connecting lines of the four limiting columns are arranged in a rectangular shape.

[0012] In order to facilitate the simultaneous dipping of multiple small sand cores, the floating plate is configured to be rectangular, and its width is not greater than the minimum distance between two limiting columns that are closer to each other.

[0013] In order to reduce the floating range of the floating plate, the width of the floating plate is 4 cm-6 cm shorter than the minimum distance between two limiting columns that are closer to each other.

[0014] In order to make the limiting effect of the limiting column more stable, the length of the floating plate is not less than the length of the center line connecting two limiting columns that are farther apart.

[0015] In order to enable the floating plate to move a greater distance under the push of the hanger, so that more sizes of socket sand cores can be dip-coated, the length of the limiting column is 2 / 3-4 / 5 of the depth of the paint bucket.

[0016] The clamp is specifically designed as follows: the clamp includes a fixed plate connected to the bottom surface of the mounting frame, and an annular groove is provided on the outer edge surface of the fixed plate, an annular airbag is arranged in the annular groove, and the annular airbag is connected to an air pipe through an air nozzle, and the air pipe is connected to an air source.

[0017] The rotation driving mode of the cross beam is that a rotation driving mechanism is installed on the outside of any hanger, the output end of the rotation driving mechanism is connected to one end of the cross beam, and the other end of the cross beam is rotationally connected to another hanger.

[0018] The beneficial effects of the utility model are as follows: the utility model is a dipping coating device for the socket sand core of a cast pipe, firstly, a plurality of clamps are installed at the bottom of the crossbeam, the clamps can squeeze and fix the socket sand core, and cooperate with the hanger to move it into the coating bucket, so as to complete the dipping coating of the sand core; and a floating plate is arranged in the coating bucket, so that when the socket sand core is driven to move downward in the coating bucket, the floating plate can block the bottom of the sand core, and can move downward with the sand core under the action of the limiting column, and the bottom of the sand core is sealed at all times, which can prevent materials from entering the inner cavity of the sand core, and facilitate the use of the sand core whose inner cavity does not need dipping coating; finally, a special clamp is arranged, and an air bag is arranged on the side of the fixed plate, so that after the fixed plate enters the inner circle of the sand core, the air bag is inflated and squeezed and fixed with the inner wall of the sand core, replacing the rigid fixation in the prior art, which can protect the sand core structure, effectively reduce the amount of damage to the sand core, and ensure the quality of the sand core. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] By reading the detailed description of the preferred embodiment below, the scheme and advantages of the present application will become clear to those skilled in the art. The accompanying drawings are only used to illustrate the preferred embodiment and are not considered to be limiting of the present invention.

[0020] In the attached picture:

[0021] Figure 1 It is a schematic diagram of the overall structure of the dipping device;

[0022] Figure 2 This is the enlarged view of point A;

[0023] Figure 3 This is a top view of the spreader;

[0024] Figure 4 A top view of a paint bucket according to Embodiment 1;

[0025] Figure 5 It is a schematic diagram of the limiting column and the U-shaped frame;

[0026] Figure 6 This is a top view of the paint bucket of Example 2;

[0027] The components represented by the reference numerals in the figure are:

[0028] 1. Hanger; 2. Paint bucket; 3. Crossbeam; 4. Fixed column; 5. Mounting frame; 6. Clamp; 61. Fixed plate; 62. Annular groove; 63. Annular airbag; 64. Air nozzle; 65. Air pipe; 7. Float; 71. Main body; 72. Limiting part; 8. Limiting column; 9. U-shaped frame; 10. Fastener; 11. Rotation drive mechanism. DETAILED DESCRIPTION

[0029] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings.

[0030] Embodiment 1

[0031] As mentioned in the background technology, after the socket sand core is hardened in the core shooting machine, the sand core needs to be taken out for dip coating to improve the appearance and strength of the sand core. The existing dip coating device, as mentioned in the comparative patent, has many defects. On the one hand, the sand core clamp 6 is relatively complicated and easy to damage the sand core. Secondly, during dip coating, the entire sand core enters the coating bucket 2, and the inner cavity of the sand core will also be dip coated, making it difficult to dip coat the sand core whose inner cavity does not need to be dip coated. Some can only be sprayed, which is more troublesome. Therefore, the inventor combined the existing dipping coating device, made improvements, and designed a new dipping coating device, which is described in detail below with reference to the drawings.

[0032] This embodiment provides a dipping device for a cast pipe socket sand core, see Figure 1 , including two hangers 1 and a paint bucket 2 placed on a reference plane. The two hangers 1 can be moved above the paint bucket 2 in the horizontal and vertical directions. The hangers 1 and the paint bucket 2 can both be designed in the prior art. The hangers 1 move back and forth between the core outlet end of the core shooting machine and the paint bucket 2, and can complete the lifting of the socket sand core and move it into the paint bucket 2 for dipping.

[0033] In this embodiment, a crossbeam 3 is rotatably installed between the bottom ends of the two hangers 1, and the rotation of the crossbeam 3 is achieved by driving a rotating drive mechanism 11. Specifically, the rotating drive device is installed on the outside of any hanger 1, and includes a rotating motor and a reducer. The output end shaft of the reducer is connected to one end of the crossbeam 3, and the other end of the crossbeam 3 is rotatably connected to another hanger 1. The output shaft is driven to rotate by the rotating motor in cooperation with the reducer, and then the crossbeam 3 is driven to rotate, so that the clamp 6 at the bottom of the crossbeam 3 can be driven to flip up and down, and the socket sand core that has been dipped and coated can be turned upward and transferred to other lifting and moving devices to move to the storage point for stacking. This design does not improve other lifting and moving devices, so the existing technology can be used without unnecessary elaboration.

[0034] On the basis of the above structure, the bottom of the crossbeam 3 is connected to a mounting frame 5 through a fixing column 4, and at least one clamp 6 is installed at the bottom of the mounting frame 5. The number of the hangers is determined according to the size of the socket sand core. If the size of the socket sand core is large, a small number of large-sized clamps 6 can be installed. If the size of the socket sand core is small, a large number of small-sized clamps 6 can be installed. Different from the comparative patent, one of the main design points in this scheme is that, combined with Figure 2 and Figure 3The clamp 6 can be elastically squeezed and fixed with the inner cavity of the socket sand core. Specifically, the clamp 6 includes a fixed plate 61 connected to the bottom surface of the mounting frame 5, and in order to reduce weight, the fixed plate 61 can be set in a form similar to a bicycle wheel hub, that is, it is connected to the outer ring through multiple connecting rods in the middle, and an annular groove 62 is opened on the outer edge surface of the fixed plate 61. An annular airbag 63 is arranged in the annular groove 62. The annular airbag 63 and the fixed plate 61 are set similarly to a tire, and the annular airbag 63 is connected to an air pipe 65 through an air nozzle 64. The air pipe 65 is connected to the air source, and if it is in the form of multiple clamps 6, multiple annular airbags 63 are connected to the air source through air distribution pipes 65. When the socket sand core is not clamped, the annular airbag 63 is in an uninflated state, and the hanger 1 drives the fixed plate 61 to move into the inner cavity of the socket sand core, and the air source supplies air, and the annular airbag 63 is expanded and squeezed and fixed with the inner cavity to complete the fixation of the socket sand core.

[0035] It should be noted that in order to improve the stability of the extrusion fixation between the annular airbag 63 and the inner cavity of the socket sand core, anti-slip grooves are provided on the outer side of the annular airbag 63 to improve the friction between the inner cavity.

[0036] As one of the other main design points of this scheme, combined with Figure 4 A floating plate 7 is arranged in the paint bucket 2, and the floating plate 7 can float on the upper end surface of the paint. A plurality of limiting columns 8 are vertically arranged on the inner wall of the paint bucket 2, and the two ends of the floating plate 7 are located between the limiting columns 8, which can limit the edge of the floating plate 7 in the horizontal plane, that is, the limiting columns 8 of the floating plate 7 can prevent the floating plate 7 from violent movement in the horizontal plane, and can only move in the vertical direction along the limiting columns 8 along with the socket sand core. Specifically, in this embodiment, there are four limiting columns 8, and the center connecting lines of the four limiting columns 8 are arranged in a rectangle. The floating plate 7 is set to be a rectangle and is located between the four limiting columns 8. The four limiting columns 8 can limit the four corners of the rectangular floating plate 7.

[0037] Moreover, the rectangular floating plate 7 is suitable for installing more than two hangers at the bottom of the mounting frame 5. The width of the floating plate 7 is not greater than the minimum distance between two limit columns 8 that are closer to each other, so that both ends of the floating plate 7 are located between the limit columns 8. In this embodiment, the width of the floating plate 7 is 4cm-6cm shorter than the minimum distance between two limit columns 8 that are closer to each other, which can ensure that the floating plate 7 has a smaller floating range in the horizontal plane, and the gap can also slow down the wear between the floating plate 7 and the limit columns 8. Moreover, the length of the floating plate 7 is not less than the length of the center line connecting the two limit columns 8 that are farther apart, so that when the floating plate 7 floats along its length direction, both ends will not move out of the limit columns 8, thereby avoiding separation from the limit columns 8 and losing the limiting function.

[0038] During dip coating, the clamp 6 fixes the socket sand core, and the hanger 1 drives it to move above the paint bucket 2 and move downward. When the socket sand core enters the paint bucket 2, the lower end face contacts the floating plate 7, and the floating plate 7 forms a seal for the socket sand core. The hanger 1 continues to move downward, and the floating plate 7 moves downward along the limiting column 8 with the socket sand core until the outer end face of the socket sand core is evenly coated. The hanger 1 drives the socket sand core to move out of the paint bucket 2. During the whole process, the floating plate 7 keeps in contact with the lower end face of the socket sand core at all times due to the buoyancy, thereby preventing the paint from entering the inner cavity.

[0039] And because the sizes of the socket sand cores are different, their heights are different, and the heights they descend in the paint bucket 2 are different. Therefore, the length of the limiting column 8 is 2 / 3-4 / 5 of the depth of the paint bucket 2, so that the limiting column 8 can limit the floating plate 7 within a larger range, adapting to the dipping of socket sand cores of more sizes.

[0040] Moreover, combined with Figure 5 The limiting column 8 is mainly fixed to the paint bucket 2 through a U-shaped frame 9, wherein the U-shaped frame 9 is buckled on the upper edge of the paint bucket 2. The limiting column 8 can be fixed to the U-shaped frame 9 located in the paint bucket 2 by welding or other means, and the U-shaped frame 9 is fixed to the paint bucket 2 by a fastener 10. In this embodiment, the fastener 10 can be a combination of bolts and nuts, and the bolts pass through the U-shaped plate and the edge of the paint bucket 2 and are fixed by nuts. Of course, the U-shaped frame 9 can also be made of elastic material, and the edge of the paint bucket 2 is clamped and fixed at the opening.

[0041] Embodiment 2

[0042] The above embodiment describes the design of a floating plate 7 corresponding to a plurality of clamps 6 installed at the bottom of the mounting frame 5. In practice, for a socket sand core that is too large and has an inner diameter greater than half the length of the mounting frame 5, the bottom of the mounting frame 5 can usually only be equipped with one set of hangers, and the corresponding floating plate 7 should be set with a corresponding shape. Figure 6 , and the other designs except the floating plate 7 are consistent with the design in the first embodiment, wherein the floating plate 7 includes a main body 71, and the main body 71 is set to be circular, and its diameter is smaller than the inner diameter of the paint bucket 2, and the edge of the main body 71 does not exceed the limiting column 8, but the diameter should be larger than the radius of the paint bucket 2, determined according to the size of the socket sand core, ensuring that it is larger than the outer diameter of the socket sand core, and there is a gap between the limiting column 8, and a plurality of limiting portions 72 are arranged on the outer edge surface of the main body 71, the limiting portion 72 is an arc convex outward, and at least two are arranged oppositely, and four are arranged in this embodiment, two by two are opposite, which can improve the overall balance performance of the floating plate 7, and any two opposite limiting portions 72 are respectively located between two closer limiting columns 8, and the limiting column 8 can limit the limiting portion 72.

[0043] When dip coating a larger-sized socket sand core, a hanger installed at the bottom of the mounting frame 5 will fix and lift the socket sand core, and move the hanger 1 to the top of the paint bucket 2, and move downward, driving the socket sand core to enter the paint bucket 2 and contact the float plate 7. The main body 71 of the float plate 7 seals the bottom of the socket sand core, and with the help of buoyancy, it moves up and down with the socket sand core in the paint bucket 2, ensuring that it maintains contact with the bottom of the socket sand core during the entire dip coating process.

Claims

1. A coating device for a cast pipe socket sand core, comprising two hangers (1) and a coating bucket (2) placed on a reference plane, wherein the two hangers (1) can be moved horizontally and vertically to above the coating bucket (2), and characterized in that: A crossbeam (3) is rotatably mounted between the bottom ends of the two hangers (1); The bottom of the crossbeam (3) is connected to a mounting frame (5) via a fixing column (4), and at least one clamp (6) is installed at the bottom of the mounting frame (5), and the clamp (6) can be elastically extruded and fixed to the inner cavity of the socket sand core; A floating plate (7) is arranged inside the paint bucket (2), and the floating plate (7) can float on the upper end surface of the paint; a plurality of limiting columns (8) are vertically arranged on the inner wall of the paint bucket (2), and the two ends of the floating plate (7) are located between the limiting columns (8), so that the edge of the floating plate (7) can be limited in a horizontal plane.

2. The dipping device for the cast pipe socket sand core according to claim 1, characterized in that: A plurality of U-shaped frames (9) are buckled and mounted on the edge of the paint bucket (2) corresponding to the limiting columns (8), and the U-shaped frames (9) are fixed to the paint bucket (2) via fasteners (10), and the limiting columns (8) are fixedly mounted on the sides of the U-shaped frames (9) correspondingly.

3. The dipping device for the cast pipe socket sand core according to claim 2, characterized in that: The fastener (10) is a bolt-nut combination, and the bolt passes through the U-shaped plate and the edge of the paint bucket (2) and is fixed by the nut.

4. The dipping device for the socket sand core of a cast pipe according to claim 1, characterized in that: Four limiting columns (8) are provided, and the center connecting lines of the four limiting columns (8) are arranged in a rectangular shape.

5. The dipping device for the socket sand core of a cast pipe according to claim 4, characterized in that: The floating plate (7) is arranged in a rectangular shape, and its width is not greater than the minimum distance between two limiting columns (8) that are close to each other.

6. The dipping device for the socket sand core of a cast pipe according to claim 4, characterized in that: The width of the floating plate (7) is 4 cm to 6 cm shorter than the minimum distance between two limiting columns (8) that are closer to each other.

7. The dipping device for the socket sand core of a cast pipe according to claim 5, characterized in that: The length of the floating plate (7) is not less than the length of a line connecting the centers of two limiting columns (8) that are farther apart.

8. The dipping device for the socket sand core of a cast pipe according to claim 1, characterized in that: The length of the limiting column (8) is 2 / 3-4 / 5 of the depth of the paint bucket (2).

9. The dipping device for the socket sand core of a cast pipe according to claim 1, characterized in that: The clamp (6) comprises a fixing plate (61) connected to the bottom surface of the mounting frame (5), and an annular groove (62) is provided on the outer edge surface of the fixing plate (61), an annular air bag (63) is arranged in the annular groove (62), and the annular air bag (63) is connected to an air pipe (65) through an air nozzle (64), and the air pipe (65) is connected to an air source.

10. The dipping device for the socket sand core of a cast pipe according to claim 1, characterized in that: A rotation drive mechanism (11) is installed on the outside of any one of the hangers (1); the output end of the rotation drive mechanism (11) is connected to one end of the crossbeam (3); and the other end of the crossbeam (3) is rotationally connected to another hanger (1).

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