A dip coating apparatus for lost foam casting.

Abstract

This utility model belongs to the field of lost foam casting, specifically a dip coating device for lost foam model coating, including a dip coating tank; a support is fixedly connected to the top of the dip coating tank; a winch is fixedly connected to the top of the support; a steel cable is installed on the winch; a dip coating frame is fixedly connected to the bottom end of the steel cable; two motors are fixedly connected to the side of the dip coating tank. By setting up motors, drive shafts, cams and dip coating frames, in use, the motors on both sides are started, and the motors on both sides drive the drive shafts and cams to rotate, controlling the motors on both sides to drive the cams to alternately strike the dip coating frame, thereby causing the lost foam to vibrate. The vibration is used to expel air bubbles in the holes and corners of the lost foam, so that the coating is applied to the holes and corners, thereby improving the coating effect of the lost foam surface and reducing the occurrence of missed coating in some areas.

Description

Technical Field

[0001] This utility model relates to the field of lost foam casting, specifically a dip coating device for coating lost foam models. Background Technology

[0002] Lost foam casting is a process of casting a solid model using a foam plastic mold with binder-free dry sand combined with vacuum technology.

[0003] In the current technology, during the manufacturing process of lost foam casting, workers will coat the surface of the foam plastic mold with a layer of refractory coating. The coating of lost foam casting is generally applied by dip coating. The dip coating device mainly consists of a dip coating tank, a dip coating rack, a fixing mechanism, and a winch. When in use, workers place the lost foam casting on the dip coating rack and rely on the winch to loosen the steel cable to put the dip coating rack into the coating in the dip coating tank, so that the lost foam casting is submerged in the liquid coating.

[0004] However, during use, some lost foam castings have holes and internal corners, which can trap air bubbles. These air bubbles prevent the coating from being applied to the surface of the lost foam casting, thus affecting the coating effect. Therefore, a coating device for lost foam castings is proposed to address the above problems. Utility Model Content

[0005] In order to overcome the shortcomings of the prior art and solve at least one of the technical problems mentioned in the background art, this utility model proposes a dip coating device for lost foam model coating.

[0006] The technical solution adopted by this utility model to solve its technical problem is as follows: A dip coating device for lost foam casting includes a dip coating tank; a support is fixedly connected to the top of the dip coating tank; a winch is fixedly connected to the top of the support; a steel cable is installed on the winch; a dip coating frame is fixedly connected to the bottom end of the steel cable; two motors are fixedly connected to the side of the dip coating tank; a drive shaft is fixedly connected to the output end of the motor; a cam is fixedly connected to the drive shaft; the dip coating frame is located between the two cams; a fixing component is provided on the dip coating frame. During use, the above-mentioned setup causes the lost foam to vibrate, relying on the vibration to expel air bubbles from the holes and corners of the lost foam, allowing the coating to be applied to the holes and corners, thereby improving the surface coating effect of the lost foam and reducing the occurrence of missed coating in some areas.

[0007] Preferably, the fixing component includes a cylinder; the cylinder is fixedly connected to the top of the bracket; a lower pressure frame is fixedly connected to the output end of the cylinder; a rotating shaft is rotatably connected to both sides of the dipping frame; a fixing arm is fixedly connected to the rotating shaft; a connecting rod is fixedly connected to both ends of the rotating shaft; a round shaft is fixedly connected to the end of the connecting rod; a sliding groove is opened at the bottom of the lower pressure frame at a position corresponding to the round shaft; the round shaft is slidably connected to the sliding groove, and the lost foam is fixed downward by the rotation of the fixing arm, so that it follows the dipping frame into the coating.

[0008] Preferably, guide plates are fixedly connected to both sides of the dip coating rack; guide grooves are formed on the guide plates; uprights are fixedly connected to the inside of the dip coating box; the uprights pass through the guide grooves and are slidably connected to them.

[0009] Preferably, a plurality of stirring blades are fixedly attached to the surface of the drive shaft; the stirring blades are located inside the dip coating tank.

[0010] Preferably, the top of the dip coating rack is fixedly connected to multiple nozzles; the multiple nozzles are arranged at an angle downwards; the ends of the nozzles are fixedly connected to flexible tubes, and the coating is sprayed onto the top of the lost foam by individually setting the nozzles, which can facilitate uniform coating of the top of the lost foam and reduce the occurrence of missed coating.

[0011] Preferably, the bottom of the dip coating rack is rotatably connected to a plurality of feed rollers; the plurality of feed rollers are arranged in a straight line at the bottom of the dip coating rack.

[0012] The advantages of this utility model are:

[0013] 1. This utility model, by setting up a motor, a drive shaft, a cam, and a dip-coating frame, allows the motors on both sides to be started during use. The motors on both sides drive the drive shaft and the cam to rotate, controlling the motors on both sides to drive the cam to alternately strike the dip-coating frame, thereby causing the lost foam to vibrate. The vibration removes air bubbles from the holes and corners of the lost foam, allowing the paint to be applied to the holes and corners, thus improving the coating effect on the surface of the lost foam and reducing the occurrence of missed coating in some areas.

[0014] 2. By setting a guide plate and a vertical rod, this utility model allows the guide plate to slide on the vertical rod during use. The guide plate and the vertical rod work together to limit the up and down movement of the dip coating rack, thereby reducing the possibility of the cam failing to contact the dip coating rack due to excessive swaying and movement. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the dip coating rack structure of this utility model;

[0018] Figure 3 This is a schematic diagram of the guide plate structure of this utility model;

[0019] Figure 4 This is a schematic diagram of the feeding roller of this utility model.

[0020] In the diagram: 11. Dipping tank; 12. Support frame; 13. Dipping rack; 14. Winch; 15. Motor; 16. Cam; 21. Shaft; 22. Fixed arm; 23. Connecting rod; 24. Lower pressure frame; 25. Cylinder; 31. Guide plate; 32. Upright pole; 4. Agitator blade; 51. Nozzle; 52. Flexible tube; 6. Feed roller; 7. Pulley. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0022] Specific implementation examples are given below.

[0023] Please see Figure 1-4 As shown, a dip coating device for lost foam casting includes a dip coating tank 11; a support 12 is fixedly connected to the top of the dip coating tank 11; a winch 14 is fixedly connected to the top of the support 12; a steel cable is installed on the winch 14; a dip coating frame 13 is fixedly connected to the bottom end of the steel cable; two motors 15 are fixedly connected to the side of the dip coating tank 11; a drive shaft is fixedly connected to the output end of the motor 15; a cam 16 is fixedly connected to the drive shaft; the dip coating frame 13 is located between the two cams 16; a fixing component is provided on the dip coating frame 13; in use, the operator places the lost foam into the bottom of the dip coating frame 13 and then controls the winch. Machine 14 loosens the steel cable to place the dip coating rack 13 and the lost foam into the dip coating tank 11. The coating material covers the lost foam. The dip coating rack 13 moves down between the two drive shafts. Then, the motors 15 on both sides are started. The motors 15 are preferably servo motors 15. The motors 15 on both sides drive the drive shafts and cams 16 to rotate. The motors 15 on both sides drive the cams 16 to alternately strike the dip coating rack 13, thereby causing the lost foam to vibrate. The vibration removes air bubbles from the holes and corners of the lost foam, allowing the coating material to be applied to the holes and corners, thereby improving the coating effect on the surface of the lost foam and reducing the occurrence of missed coating in some areas.

[0024] Furthermore, such as Figure 2As shown, the fixing assembly includes a cylinder 25; the cylinder 25 is fixedly connected to the top of the bracket 12; a lower pressure frame 24 is fixedly connected to the output end of the cylinder 25; rotating shafts 21 are rotatably connected to both sides of the coating rack 13; a fixing arm 22 is fixedly connected to the rotating shaft 21; connecting rods 23 are fixedly connected to both ends of the rotating shaft 21; a round shaft is fixedly connected to the end of the connecting rod 23; a sliding groove is formed at the bottom of the lower pressure frame 24 at a position corresponding to the round shaft; the round shaft is slidably connected to the sliding groove; During use, because the density of the lost foam is lower than that of the liquid coating, it will float. The cylinder 25 drives the lower pressure frame 24 to move downward, so that the round shaft of the connecting rod 23 slides in the groove of the lower pressure frame 24. At the same time, it pushes the rotating shaft 21 and the fixed arm 22 to rotate. The fixed arm 22 rotates downward to fix the lost foam. After vibration dipping, the cylinder 25 is controlled to reset, so that the lost foam floats up naturally. This makes it easier for the coating to be dipped into the area that was blocked when the lost foam was fixed.

[0025] Furthermore, such as Figure 2-3 As shown, guide plates 31 are fixedly connected to both sides of the dip coating rack 13; guide grooves are provided on the guide plates 31; uprights 32 are fixedly connected inside the dip coating box 11; the uprights 32 pass through the guide grooves and are slidably connected to them; in use, the guide plates 31 slide on the uprights 32, and the guide plates 31 and the uprights 32 cooperate to limit the up and down movement of the dip coating rack 13, thereby reducing the situation where the cam 16 cannot contact the dip coating rack 13 due to excessive shaking and movement.

[0026] Furthermore, such as Figure 2 As shown, multiple stirring blades 4 are fixedly attached to the surface of the drive shaft; the stirring blades 4 are located inside the dip coating tank 11; in use, the stirring blades 4 can be used to disturb the liquid coating in the dip coating tank 11, so that the coating can easily adhere to the inside corners of the holes of the lost foam, thereby reducing the occurrence of dip coating defects on the surface of the lost foam.

[0027] Furthermore, such as Figure 2 As shown, multiple nozzles 51 are fixedly connected to the top of the dip coating rack 13; the multiple nozzles 51 are arranged at an angle downwards; a flexible tube 52 is fixedly connected to the end of each nozzle 51; in use, because the bottom of the fixed arm 22 presses down on the lost foam, when the lost foam floats up, the contact position between the lost foam and the fixed arm 22 and the paint contact time are short. The flexible tube 52 is connected to the liquid pump, and the liquid pump delivers the paint. The paint is sprayed onto the top of the lost foam by the individually set nozzles 51, which can facilitate the uniform coating of the top of the lost foam, thereby reducing the occurrence of missed coating.

[0028] Furthermore, such as Figure 4As shown, the bottom of the dip coating rack 13 is rotatably connected to multiple feeding rollers 6; the multiple feeding rollers 6 are arranged in a straight line at the bottom of the dip coating rack 13; in use, the multiple feeding rollers 6 rotatably connected can be used to facilitate the rolling and feeding of the lost foam after dip coating, thereby making it convenient for workers to pick up and put down the lost foam and for workers to use.

[0029] Furthermore, such as Figure 4 As shown, pulleys 7 are rotatably connected to both sides of the dip coating rack 13. During use, the pulleys 7 are located at the contact position between the cam 16 and the dip coating rack 13. By setting the pulleys 7, the friction and wear between the end of the cam 16 and the surface of the dip coating rack 13 can be reduced.

[0030] Working principle: During use, the operator places the lost foam into the bottom of the dip coating rack 13, then controls the winch 14 to release the steel cable, thereby placing the dip coating rack 13 and the lost foam into the dip coating tank 11. The coating material covers the lost foam. The dip coating rack 13 moves down between the two drive shafts, and then the motors 15 on both sides are started. The motors 15 are preferably servo motors 15. The motors 15 on both sides drive the drive shafts and cams 16 to rotate, controlling the motors 15 on both sides to drive the cams 16 to alternately strike the dip coating rack 13, thereby causing the lost foam to vibrate. Vibration removes air bubbles from the holes and corners of the lost foam coating, ensuring the coating is applied to these areas and improving the surface finish. This reduces the risk of missed areas. Because the density of the lost foam coating is lower than that of the liquid coating, it floats. The cylinder 25 drives the lower pressure frame 24 downwards, causing the connecting rod 23's shaft to slide within the groove of the lower pressure frame 24. Simultaneously, this drives the rotating shaft 21 and the fixing arm 22 to rotate. The rotating fixing arm 22 then holds the lost foam coating in place. After vibration-assisted coating, the cylinder 25 is reset. The lost foam floats naturally, allowing the coating to easily reach areas previously obscured during casting. In use, the guide plate 31 slides on the upright 32. The cooperation between the guide plate 31 and the upright 32 limits the vertical movement of the coating rack 13, preventing excessive wobbling and ensuring the cam 16 can contact it. The stirring blades 4 disrupt the liquid coating within the coating tank 11, facilitating adhesion to the corners and openings of the lost foam, thus reducing surface congestion. In the case of coating defects, because the bottom of the fixed arm 22 presses down on the lost foam, the contact time between the lost foam and the fixed arm 22 and the coating is short when the lost foam floats up. The flexible tube 52 is connected to the liquid pump, which delivers the coating. The coating is sprayed onto the top of the lost foam by a separate nozzle 51, which facilitates uniform coating on the top of the lost foam and reduces the occurrence of missed coating. Multiple feeding rollers 6 are rotatably connected to facilitate the rolling and feeding of the lost foam after coating, which makes it convenient for workers to pick up and put down the lost foam and make it convenient for workers to use.

[0031] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0032] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A dip coating apparatus for lost foam casting, comprising a dip coating tank (11); a support (12) fixedly connected to the top of the dip coating tank (11); a winch (14) fixedly connected to the top of the support (12); a steel cable mounted on the winch (14); and a dip coating rack (13) fixedly connected to the bottom end of the steel cable; characterized in that: Two motors (15) are fixedly connected to the side of the dip coating tank (11); a drive shaft is fixedly connected to the output end of the motor (15); a cam (16) is fixedly connected to the drive shaft; the dip coating rack (13) is located between the two cams (16); and a fixing component is provided on the dip coating rack (13).

2. The dip-coating apparatus for lost foam casting according to claim 1, characterized in that: The fixing assembly includes a cylinder (25); the top of the bracket (12) is fixedly connected to the cylinder (25); the output end of the cylinder (25) is fixedly connected to a lower pressure frame (24); both sides of the dip coating frame (13) are rotatably connected to a rotating shaft (21); a fixed arm (22) is fixedly connected to the rotating shaft (21); both ends of the rotating shaft (21) are fixedly connected to a connecting rod (23); the end of the connecting rod (23) is fixedly connected to a round shaft; a sliding groove is opened at the bottom of the lower pressure frame (24) at the position corresponding to the round shaft; the round shaft is slidably connected to the sliding groove.

3. The dip-coating apparatus for lost foam casting according to claim 1, characterized in that: Guide plates (31) are fixedly connected to both sides of the dip coating rack (13); guide grooves are provided on the guide plates (31); uprights (32) are fixedly connected inside the dip coating box (11); the uprights (32) pass through the guide grooves and are slidably connected to them.

4. The dip-coating apparatus for lost foam casting according to claim 1, characterized in that: Multiple stirring blades (4) are fixed to the surface of the drive shaft; the stirring blades (4) are located inside the dip coating tank (11).

5. The dip-coating apparatus for lost foam casting according to claim 2, characterized in that: The top of the dip coating rack (13) is fixedly connected to a plurality of nozzles (51); the plurality of nozzles (51) are arranged at an angle downward; and the ends of the nozzles (51) are fixedly connected to flexible tubes (52).

6. The dip-coating apparatus for lost foam casting according to claim 1, characterized in that: The bottom of the dip coating rack (13) is rotatably connected to a plurality of feed rollers (6); the plurality of feed rollers (6) are arranged in a straight line at the bottom of the dip coating rack (13).

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