Foam model dipping system and dipping method for lost foam casting

Abstract

The present invention discloses a foam model dipping system and dipping method for lost foam casting. The device includes a placement plate, a bearing assembly is provided inside the placement plate, and the bearing assembly includes multiple groups of support rods, and the tops of the support rods are rotatably connected with rolling rods that fit the foam model; two support rods in the same group move toward or in opposite directions so that the rolling rods rotate on the bottom surface of the foam model, while the support rods in other groups maintain a state of supporting the foam model, and after the support rods in other groups move in turn, the foam model is shielded from the surface to complete the dipping and air-drying work. The two support rods in the same group move toward or in opposite directions, driving the rolling rods to rotate on the bottom surface of the foam model. The two rolling rods moving toward or in opposite directions will not push the foam model to move, while the support rods in other positions still maintain support for the foam model. The movement of the rolling rods allows the foam model to shield the surface to leak, thereby facilitating the dipping and air-drying work and avoiding the occurrence of coating leaks.

Description

Technical Field

[0001] The invention belongs to the technical field of lost foam casting, and in particular relates to a foam model dipping system for lost foam casting and a dipping method for the foam model for lost foam casting. Background Art

[0002] Lost foam casting is a full-mold casting process in which a foam plastic mold is made of binder-free dry sand combined with vacuum technology. The foam model is usually made of expandable polystyrene. Lost foam coating plays a vital role in the casting process. It not only supports and protects the foam model, but also prevents liquid metal from penetrating into the sand and sticking to it. At the same time, it absorbs decomposition products and allows decomposition gases to pass through the coating, maintaining the integrity of the cavity formed after the foam model evaporates and preventing the heat of the liquid metal from dissipating quickly.

[0003] There are many methods for coating foam models, generally divided into dipping, brushing, and spraying. When dipping large foam models, some parts of the foam model surface may be obstructed due to clamping or placement, thus affecting the coating process. Summary of the Invention

[0004] The present invention addresses the problem in the prior art that some surfaces of foam models may be blocked due to clamping or placement, which affects the coating of the foam model surface. The present invention proposes the following technical solutions:

[0005] Foam pattern dipping system for lost foam casting, including:

[0006] A dipping box, wherein the dipping box contains coating material for dipping;

[0007] A placement plate, the placement plate can be raised and lowered in the dipping box, a bearing assembly is provided inside the placement plate, the bearing assembly includes multiple groups of support rods, two support rods in the same group move toward or in opposite directions, the tops of the support rods extend to the outside of the placement plate, and the tops of the support rods are rotatably connected to the rolling rods that fit the foam model;

[0008] The two support rods in the same group move toward or in opposite directions so that the rolling rod rotates on the bottom surface of the foam model, while the support rods in other groups maintain the supporting state of the foam model. After the support rods in other groups move in turn, the blocked surface of the foam model is exposed to complete the dipping and air drying work.

[0009] As a preferred embodiment of the above technical solution, the supporting assembly also includes a driving part, which includes a motor and a screw connected to the output end of the motor, the screw is rotatably inserted in the placement plate, and reciprocating threads are provided at both ends of the screw, and a movable slider is sleeved on the threaded surface of the screw, and a pushing block is provided in the middle of the movable slider for lifting and lowering, and the placement plate is provided with a lifting groove at the bottom of the support rod.

[0010] As a preferred embodiment of the above technical solution, a rotating cylinder is rotatably connected to the bottom of the pushing block, and the rotating cylinder moves along the lifting groove surface to lift the pushing block.

[0011] As a preferred embodiment of the above technical solution, a water-blocking cover is sleeved on the surface of the motor, and one end of the water-blocking cover is sealed to the placement plate.

[0012] As a preferred embodiment of the above technical solution, return springs are fixedly connected to both sides of the end of the support rod, and one end of the return spring is fixedly connected to the placement plate.

[0013] As a preferred embodiment of the above technical solution, both end surfaces of the support rod are fixedly connected with soft films, and the four sides of the soft films are fixedly connected to the surface of the placement plate.

[0014] As a preferred embodiment of the above technical solution, it further includes a mounting frame, a cylinder is provided on the top, and the output end of the cylinder is fixedly connected to the placement plate.

[0015] As a preferred embodiment of the above technical solution, limit rods are provided on both sides of the mounting frame at both sides of the placement plate, and the two limit rods limit the moving path of the placement plate.

[0016] The dipping method of the foam model dipping system for lost foam casting comprises the following steps:

[0017] S1, foam model dipping;

[0018] After placing the foam model on the supporting assembly, the placement plate is moved downward so that the foam model gradually enters the dipping box;

[0019] S2, leakage from the foam model surface;

[0020] The two support rods in the same group move toward or in opposite directions, and the rolling rod rotates on the bottom surface of the foam model to expose the surface covered by the foam model. The support rods in other groups move in turn to complete the dipping process.

[0021] S3, air-dry the foam model;

[0022] The placement plate is moved up to remove the dip-coated foam model and start air-drying. During the air-drying process, multiple groups of support rods complete the movement in S2 to speed up the air-drying speed of the bottom surface of the foam model.

[0023] The beneficial effects of the present invention are:

[0024] 1. The two support rods in the same group move toward or in opposite directions, driving the rolling rod to rotate on the bottom surface of the foam model. The two rolling rods moving toward or in opposite directions will not push the foam model to move, while the support rods in other positions still maintain support for the foam model. The movement of the rolling rods allows the foam model to block the surface leakage, thereby facilitating dipping and air drying work and avoiding coating leakage.

[0025] 2. The driving unit is used to push two support rods in the same group toward or in opposite directions, and multiple support rods can be moved in sequence to avoid excessive movement of the rolling rods that causes the foam model to move, thereby ensuring the stability of the foam model. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 What is shown is a schematic diagram of the overall structure of the embodiment;

[0027] Figure 2 Shown is a front view of the placement plate in the embodiment;

[0028] Figure 3 Shown is a front cross-sectional view of the placement plate in the embodiment;

[0029] Figure 4 Shown is a top view of the placement plate in the embodiment;

[0030] Figure 5 Shown is a diagram of the installation position of the push block in the embodiment.

[0031] In the figure: 10, dipping box; 20, placing plate; 30, bearing assembly; 31, support rod; 32, rolling rod; 33, return spring; 34, driving part; 341, screw rod; 342, moving slider; 343, pushing block; 344, lifting groove; 345, rotating cylinder; 35, soft film; 36, water-proof cover; 40, mounting frame; 50, cylinder; 60, limit rod. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments and the accompanying drawings.

[0033] Example

[0034] Figure 1-Figure 3 The foam pattern dipping system for lost foam casting includes:

[0035] A dipping box 10, wherein the dipping box 10 contains a coating material for dipping;

[0036] A placement plate 20 is provided, which can be raised and lowered in the dipping box 10. A bearing assembly 30 is provided inside the placement plate 20. The bearing assembly 30 includes multiple groups of support rods 31. Two support rods 31 in the same group move toward or in opposite directions. The tops of the support rods 31 extend to the outside of the placement plate 20. The tops of the support rods 31 are rotatably connected to the rolling rods 32 that fit the foam model.

[0037] The two support rods 31 in the same group move toward or in opposite directions so that the rolling rod 32 rotates on the bottom surface of the foam model, while the support rods 31 in other groups maintain the supporting state of the foam model. After the support rods 31 in other groups move in turn, the blocked surface of the foam model is exposed to complete the dipping and air drying work.

[0038] During the dipping and air-drying process, the two support rods 31 of the same group move toward or in opposite directions, and the rolling rod 32 rotates on the bottom surface of the foam model to expose the masked surface of the foam model.

[0039] The two support rods 31 of the same group move toward or in opposite directions, driving the rolling rod 32 to rotate on the bottom surface of the foam model. The two rolling rods 32 moving toward or in opposite directions will not push the foam model to move, while the support rods 31 at other positions still maintain support for the foam model. The movement of the rolling rod 32 allows the foam model to block the surface leakage, thereby facilitating dipping and air drying work and avoiding coating leakage.

[0040] The dipping method of the foam model dipping system for lost foam casting comprises the following steps:

[0041] S1, foam model dipping;

[0042] After the foam model is placed on the supporting assembly 30, the placement plate 20 is moved downward so that the foam model gradually enters the dipping box 10;

[0043] S2, leakage from the foam model surface;

[0044] The two support rods 31 of the same group move toward or in opposite directions, and the rolling rod 32 rotates on the bottom surface of the foam model to expose the surface covered by the foam model. The support rods 31 of other groups move in turn to complete the dipping process.

[0045] S3, air-dry the foam model;

[0046] The placement plate 20 is moved upward to remove the foam model after dipping and start air drying. During the air drying process, the multiple groups of support rods 31 complete the movement in S2 to speed up the air drying speed of the bottom surface of the foam model.

[0047] In this technical solution, multiple rolling rods 32 are used to support and place the foam model, and two rolling rods 32 in the same group move toward or in opposite directions to expose the obstructed area at the bottom of the foam model, making it easier to dip and air-dry the foam model.

[0048] Figure 2-Figure 5 In the embodiment, the supporting assembly 30 also includes a driving part 34, which includes a motor and a screw rod 341 connected to the output end of the motor. The screw rod 341 is rotatably inserted into the placement plate 20, and reciprocating threads are provided at both ends of the screw rod 341. The threaded surfaces of the screw rod 341 are both sleeved with a movable slider 342. A pushing block 343 is provided in the middle of the movable slider 342 for lifting and lowering. The placement plate 20 is provided with a lifting groove 344 at the bottom of the support rod 31.

[0049] A rotating cylinder 345 is rotatably inserted into the bottom of the pushing block 343 , and the rotating cylinder 345 moves along the surface of the lifting groove 344 to lift the pushing block 343 .

[0050] Restoring springs 33 are fixedly connected to both sides of the end of the support rod 31 , and one end of the restoring spring 33 is fixedly connected to the placement plate 20 .

[0051] When the support rod 31 needs to be moved, the motor starts to drive the screw rod 341 to rotate, and the two moving sliders 342 move in the opposite direction. When the moving slider 342 moves, the internal pushing block 343 moves, and the rotating cylinder 345 moves along the lifting groove 344 to lift the pushing block 343. The top of the pushing block 343 exceeds the top of the moving slider 342 so that it can contact the support rod 31. The pushing block 343 pushes the support rod 31 to move and compresses the return spring 33 on one side, while the return spring 33 on the other side is stretched. When the rotating cylinder 345 moves to the other side of the lifting groove 344, the pushing block 343 drops down and leaves the support rod 3 1 position, after the pushing block 343 returns to the inside of the moving slider 342, the return spring 33 resets the support rod 31 and the rolling rod 32, and the moving slider 342 passes through multiple support rod 31 positions so that the pushing block 343 pushes the support rod 31. When the moving slider 342 moves to one end of the screw rod 341, the moving slider 342 starts to move in the opposite direction, and the rotating cylinder 345 rotates in the opposite direction from the lifting groove 344 and pushes the pushing block 343 out. The moving slider 342 can drive the pushing block 343 to push it in the opposite direction from the other side of the support rod 31, and the support rod 31 drives the rolling tube to move in the opposite direction on the bottom surface of the foam model.

[0052] The driving part 34 is used to push two support rods 31 of the same group toward or in opposite directions, and multiple support rods 31 can be moved in sequence to avoid excessive movement of the rolling rods 32 causing the foam model to move, thereby ensuring the stability of the foam model.

[0053] Figure 1 In the embodiment, a water-blocking cover 36 is sleeved on the surface of the motor, and one end of the water-blocking cover 36 is sealed with the placement plate 20.

[0054] The water-proof cover 36 can isolate and seal the motor to prevent the coating paint from entering the interior of the motor and causing damage to the motor.

[0055] Figure 1-Figure 3 In the figure, both end surfaces of the support rod 31 are fixedly connected with soft films 35, and the four sides of the soft film 35 are fixedly connected to the surface of the placement plate 20.

[0056] The soft film 35 can seal the support rod 31 and the placement plate 20 to prevent the coating paint from entering the placement plate 20 and affecting the use of the bearing assembly 30.

[0057] Figure 1 The apparatus further includes a mounting frame 40 , a cylinder 50 is provided on the top, and an output end of the cylinder 50 is fixedly connected to the placement plate 20 .

[0058] Limit rods 60 are provided on both sides of the mounting frame 40 and located on both sides of the placement plate 20 . The two limit rods 60 limit the moving path of the placement plate 20 .

[0059] The cylinder 50 is started to push the placement plate 20 to rise and fall. During the rising and falling process of the placement plate 20, the two limit rods 60 limit the movement path of the placement plate 20 to prevent the placement plate 20 from moving and causing the foam model to slide off the top of the supporting component 30.

[0060] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same.

Claims

1. Foam model dipping system for lost foam casting, characterized in that: include: A dipping box (10), wherein the dipping box (10) contains a coating material for dipping; A placement plate (20), wherein the placement plate (20) is arranged in a liftable manner in the dipping box (10), a bearing assembly (30) is arranged inside the placement plate (20), and the bearing assembly (30) includes a plurality of groups of support rods (31), two support rods (31) in the same group move toward or in opposite directions, the tops of the support rods (31) extend to the outside of the placement plate (20), and the tops of the support rods (31) are rotatably connected to the rolling rods (32) that fit the foam model; The two support rods (31) in the same group move toward or in opposite directions so that the rolling rod (32) rotates on the bottom surface of the foam model, while the support rods (31) in other groups maintain the state of supporting the foam model. After the support rods (31) in other groups move in sequence, the blocked surface of the foam model is exposed to complete the dipping and air drying work; Restoring springs (33) are fixedly connected to both sides of the end of the support rod (31), and one end of the restoring spring (33) is fixedly connected to the placement plate (20); The bearing assembly (30) further includes a driving portion (34), the driving portion (34) including a motor and a screw rod (341) connected to an output end of the motor, the screw rod (341) being rotatably inserted into the placement plate (20), the screw rod (341) having reciprocating threads at both ends, the threaded surfaces of the screw rod (341) being sleeved with a movable slider (342), the middle portion of the movable slider (342) being provided with a push block (343) for lifting, and the placement plate (20) being provided with a lifting groove (344) at the bottom of the support rod (31); The bottom of the pushing block (343) is rotatably connected with a rotating cylinder (345), and the rotating cylinder (345) moves along the lifting groove (344) to lift the pushing block (343).

2. The foam pattern dipping system for lost foam casting according to claim 1, characterized in that: A water-blocking cover (36) is sleeved on the surface of the motor, and one end of the water-blocking cover (36) is sealed with the placement plate (20).

3. The foam pattern dipping system for lost foam casting according to claim 1, characterized in that: Soft films (35) are fixedly connected to the surfaces of both ends of the support rod (31), and the four sides of the soft film (35) are fixedly connected to the surface of the placement plate (20).

4. The foam pattern dipping system for lost foam casting according to claim 1, characterized in that: It also includes a mounting frame (40), the top of which is provided with a cylinder (50), and the output end of the cylinder (50) is fixedly connected to the placement plate (20).

5. The foam pattern dipping system for lost foam casting according to claim 4, characterized in that: Limiting rods (60) are provided on both sides of the mounting frame (40) and on both sides of the placement plate (20), and the two limiting rods (60) limit the moving path of the placement plate (20).

6. The dipping method of the foam pattern dipping system for lost foam casting according to any one of claims 1 to 5, characterized in that: The following steps are included: S1, foam model dipping; After the foam model is placed on the supporting assembly (30), the placement plate (20) is moved downward so that the foam model gradually enters the dipping box (10); S2, leakage from the foam model surface; The two support rods (31) of the same group move toward or in opposite directions, and the rolling rod (32) rotates on the bottom surface of the foam model to expose the surface covered by the foam model. The support rods (31) of other groups move in sequence to complete the dipping process. S3, air-dry the foam model; The placement plate (20) is moved upward to remove the foam model after dipping and start air drying. During the air drying process, the multiple groups of support rods (31) complete the movement in S2 to speed up the air drying speed of the bottom surface of the foam model.

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