A foundry sand shell drying apparatus

Abstract

This utility model relates to the technical field of investment casting drying equipment, specifically a sand shell drying device for investment casting. The drying chamber contains two symmetrically arranged limiting frames, each with a guide groove. A support plate is also provided inside the drying chamber, with both sides of the support plate inserted into the guide groove and slidably connected to the limiting frames. A tray is rotatably mounted on the support plate. A first motor is fixedly mounted below the support plate, and the output end of the first motor has a first rotating shaft connecting to the tray. A second motor drives the support plate to extend out of the drying chamber, allowing workers to directly place sand shells outside the chamber. This avoids the difficulty of loading materials due to the limited space inside traditional equipment, making it particularly suitable for mass production scenarios and significantly improving sand shell manufacturing efficiency.

Description

Technical Field

[0001] This utility model relates to the technical field of investment casting drying equipment, specifically a sand shell drying device for investment casting. Background Technology

[0002] In the field of investment casting, the investment mold is usually made of paraffin wax. After the sand shell is attached to the outside of the wax mold, the sand shell needs to be dried and then placed in a hardening bath for hardening. Finally, the wax mold needs to be melted, which is commonly known as lost-wax casting.

[0003] Generally, after the sand shell is attached to the wax model, it needs to be dried before entering the hardening tank. At this time, the shell needs to be manually placed into the equipment box for drying. Due to the limited space inside the equipment box, it is not easy for the staff to place the shell inside the equipment box, resulting in low material loading efficiency, which in turn reduces the manufacturing efficiency of the sand shell. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a drying device for investment casting sand shells.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a drying device for investment casting sand shells, including a drying box, a door at the front end of the drying box, two limiting frames symmetrically arranged inside the drying box, guide grooves on the limiting frames, and a support plate inside the drying box, the two sides of the support plate being inserted into the guide grooves and slidably connected to the limiting frames;

[0006] A tray is rotatably mounted on the support plate, and a first motor is fixedly mounted below the support plate. The output end of the first motor is provided with a first rotating shaft that connects to the tray.

[0007] The drying chamber has a distribution box located above the support plate inside. The lower end of the distribution box has multiple air outlet pipes. An air supply device is provided on one side of the drying chamber. The air outlet of the air supply device is connected to the distribution box through a duct. An exhaust pipe is provided at the rear end of the drying chamber.

[0008] Furthermore, an improvement of this utility model is that the tray is provided with multiple ventilation holes.

[0009] To facilitate the assembly of the first motor, the present invention includes an improvement in which the first motor is fixed to the lower part of the support plate by a support rod, and the outer end of the support rod is fixed to the lower end of the support plate by screws.

[0010] To facilitate the extension of the support plate within the drying chamber, the present invention includes the following improvements: a base plate is provided below the support plate, the base plate is located below the drying chamber, the front end of the base plate is connected to the front end of the support plate via a vertical plate, a toothed plate is provided at the lower end of the base plate, a base frame is provided at the lower end of the drying chamber, a second motor is provided on the base frame, a second rotating shaft is provided at the output end of the second motor, a gear that meshes with the toothed plate is provided on the second rotating shaft, and a groove is provided at the front end of the drying chamber, into which the vertical plate can be inserted.

[0011] Furthermore, an improvement of this utility model is that both the first motor and the second motor are servo motors.

[0012] Compared with the prior art, this utility model provides a drying device for investment casting sand shells, which has the following beneficial effects:

[0013] By using a second motor to drive the support plate to extend out of the drying chamber, workers can place sand shells directly outside the chamber, avoiding the problem of difficult material loading caused by the small space inside the chamber of traditional equipment. This is especially suitable for mass production scenarios and significantly improves the efficiency of sand shell manufacturing.

[0014] Driven by the first motor, the tray rotates at a uniform speed. Combined with the multi-channel air outlet design of the distribution box, this ensures that all parts of the sand shell are exposed to hot air. The vent structure further enhances the penetration of hot air, improving drying uniformity compared to traditional static drying methods and effectively preventing problems such as cracking and insufficient hardening of the sand shell caused by uneven drying. Attached Figure Description

[0015] Figure 1 This is a first-view perspective three-dimensional structural diagram of the present invention;

[0016] Figure 2 This is a second-view perspective three-dimensional structural diagram of the present invention;

[0017] Figure 3 This is a third-view three-dimensional structural diagram of the present invention;

[0018] Figure 4 This utility model Figure 1 The main view;

[0019] In the diagram: 1. Drying oven; 2. Limiting frame; 3. Guide groove; 4. Bearing plate; 5. Tray; 6. First motor; 7. Base plate; 8. Toothed plate; 9. Base frame; 10. Second motor; 11. Second rotating shaft; 12. Gear; 13. Groove; 14. Guide rod; 15. Empty slot; 16. Exhaust duct; 17. Diverter box; 18. Air supply equipment. Detailed Implementation

[0020] 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 protection scope of the present utility model.

[0021] Please see Figures 1-4 This utility model discloses a drying device for sand shells in investment casting, including a drying box 1. The front end of the drying box 1 is provided with a door. Two limiting frames 2 are symmetrically arranged inside the drying box 1. The limiting frames 2 are provided with guide grooves 3. The drying box 1 is also provided with a support plate 4. The two sides of the support plate 4 are inserted into the guide grooves 3 and are slidably connected with the limiting frames 2.

[0022] The support plate 4 is rotatably mounted on a tray 5, and a first motor 6 is fixedly mounted below the support plate 4. The output end of the first motor 6 is provided with a first rotating shaft that connects to the tray 5.

[0023] The drying chamber 1 has a distribution box 17 located above the support plate 4 inside. The lower end of the distribution box 17 is provided with multiple air outlet pipes. The drying chamber 1 has an air supply device 18 on one side. The air outlet of the air supply device 18 is connected to the distribution box 17 through a duct. The rear end of the drying chamber 1 is provided with an exhaust pipe 16.

[0024] The tray 5 is provided with multiple ventilation holes.

[0025] The first motor 6 is fixed to the bottom of the support plate 4 by a support rod, and the outer end of the support rod is fixed to the lower end of the support plate 4 by screws.

[0026] Both the first motor 6 and the second motor 10 are servo motors.

[0027] This drying device achieves efficient drying of investment casting sand shells through a combination of mechanical transmission and hot air circulation. The specific process is as follows:

[0028] A base plate 7 is provided below the support plate 4. The base plate 7 is located below the drying oven 1. The front end of the base plate 7 is connected to the front end of the support plate 4 through a vertical plate. A toothed plate 8 is provided at the lower end of the base plate 7. A base frame 9 is provided at the lower end of the drying oven 1. A second motor 10 is provided on the base frame 9. A second rotating shaft 11 is provided at the output end of the second motor 10. A gear 12 that meshes with the toothed plate 8 is provided on the second rotating shaft 11. A groove 13 is provided at the front end of the drying oven 1. The vertical plate can be inserted into the groove 13.

[0029] Inside the drying oven 1, the limiting frame 2 provides a sliding track for the support plate 4 via the guide groove 3. The second motor 10 on the base frame 9 is activated, driving the gear 12 on the second rotating shaft 11 to rotate. This gear meshes with the toothed plate 8, causing the support plate 4 to move back and forth along the guide groove 3. When the vertical plate at the front end of the support plate 4 is inserted into the groove 13 at the front end of the drying oven 1, the support plate 4 is fully inserted into the drying oven 1; conversely, the support plate 4 can be extended outside the oven, facilitating manual placement of the sand shell.

[0030] After the support plate 4 is in place, the tray 5 is driven to rotate by the first motor 6. The vent holes on the surface of the tray 5 allow hot air to penetrate the sand shell. The air supply device 18 delivers the drying air to the distribution box 17, and it is evenly blown out through multiple air outlet pipes, covering the sand shell on the tray 5. After the drying air comes into contact with the sand shell, it carries away the moisture and is discharged through the exhaust pipe 16, forming a circulating drying environment.

[0031] Hot air generated by the air supply device 18 enters the distribution box 17 through a duct and is blown out through the air outlet pipe at the lower end of the distribution box 17, thus covering the area of ​​the tray 5. As the tray 5 rotates, the surface of the sand shell can fully contact the hot air, and the moisture evaporates quickly. Excess hot air is discharged through the exhaust pipe 16 to ensure stable airflow inside the box and prevent moisture accumulation.

[0032] This device can adapt to the drying needs of investment casting sand shells of different sizes and materials by adjusting the hot air temperature and the tray rotation speed. Whether it is a small precision casting sand shell or a large industrial sand shell, efficient drying can be achieved through parameter adjustment, thus broadening the application scenarios of the equipment.

[0033] In summary, this device, through the combination of mechanical automation and hot air circulation technology, breaks through the efficiency bottleneck of traditional drying equipment, improves drying quality while reducing energy consumption, and provides reliable technical support for the industrial production of investment casting sand shells.

[0034] 1. Drying oven;

[0035] Material: Outer shell Q235 carbon steel (5mm thick), inner wall 304 stainless steel.

[0036] 1. Air supply equipment 18;

[0037] Type: Centrifugal hot air blower.

[0038] In the description herein, it should be noted that relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0039] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention.

Claims

1. A foundry sand shell drying apparatus for dry sand moulding, comprising a drying cabinet (1) having a cabinet door at its front end, characterised in that: The drying oven (1) is equipped with two symmetrically arranged limiting frames (2) inside. The limiting frames (2) are provided with guide grooves (3). The drying oven (1) is also provided with a support plate (4). The two sides of the support plate (4) are inserted into the guide grooves (3) and are slidably connected with the limiting frames (2). A tray (5) is rotatably mounted on the support plate (4), and a first motor (6) is fixedly mounted below the support plate (4). The output end of the first motor (6) is provided with a first rotating shaft that connects to the tray (5). The drying box (1) is provided with a distribution box (17) located above the support plate (4) inside. The lower end of the distribution box (17) is provided with multiple air outlet pipes. The drying box (1) is provided with an air supply device (18) on one side. The air outlet of the air supply device (18) is connected to the distribution box (17) through a conduit. The rear end of the drying box (1) is provided with an exhaust pipe (16).

2. A foundry sand shell drying apparatus as claimed in claim 1, wherein: The tray (5) is provided with multiple ventilation holes.

3. The sand shell drying device for investment casting according to claim 2, characterized in that: The first motor (6) is fixed to the bottom of the support plate (4) by a support rod, and the outer end of the support rod is fixed to the lower end of the support plate (4) by screws.

4. A foundry sand shell drying apparatus as claimed in claim 3, wherein: A base plate (7) is provided below the support plate (4). The base plate (7) is located below the drying oven (1). The front end of the base plate (7) is connected to the front end of the support plate (4) through a vertical plate. A toothed plate (8) is provided at the lower end of the base plate (7). A base frame (9) is provided at the lower end of the drying oven (1). A second motor (10) is provided on the base frame (9). A second rotating shaft (11) is provided at the output end of the second motor (10). A gear (12) that meshes with the toothed plate (8) is provided on the second rotating shaft (11).

5. A foundry sand shell drying apparatus as claimed in claim 4, wherein: The front end of the drying oven (1) is provided with a groove (13), and the vertical plate can be inserted into the interior of the groove (13).

6. A foundry sand shell drying apparatus as claimed in claim 5, wherein: Both the first motor (6) and the second motor (10) are servo motors.

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