A kind of anti-leakage device for vacuumizing of adapted resin sand mold lost foam casting

Abstract

The utility model relates to the field of lost foam casting, and specifically relates to a lost foam vacuumizing casting anti-leakage device matched with resin sand mold, which comprises a lost foam sand box main body, a sand box base fixedly connected to the bottom of the lost foam sand box main body, an electric air pump installed on one side of the lost foam sand box main body, a rubber soft air pipe communicated with the output end of the electric air pump, a sealing main body fixedly connected to the top of the lost foam sand box main body, a connecting pipe fixedly connected to one side of the sealing main body, the connecting pipe being communicated with the rubber soft air pipe, an extension rod fixedly connected to the inner bottom wall of the sealing main body, and a sealing strip fixedly connected to the top of the extension rod.

Description

Technical Field

[0001] This utility model relates to the field of lost foam casting, specifically a leak-proof device for lost foam vacuum casting adapted to resin sand molds. Background Technology

[0002] Lost foam casting with resin sand molds is a precision casting method that combines resin sand technology with lost foam casting technology. Its core lies in achieving mold compaction and gas release through a negative pressure environment, thereby improving the surface quality of the casting and reducing energy consumption. The anti-leakage device for lost foam vacuum casting typically uses an annular rubber pad on the lower end face and a gas guide groove to form an airtight layer. A rubber flexible air pipe is connected to the air source to achieve self-cleaning of the sealing surface, ensuring that there is no gas leakage in the sand box under negative pressure. The negative pressure environment is formed through the electric air pump interface and the rubber flexible air pipe. Combined with the built-in molten metal pouring system, it effectively prevents leakage problems caused by gas expansion during the pouring process of resin sand mold.

[0003] A vacuum sand box for lost foam casting, as disclosed in Chinese Patent No. CN213052635U, includes a sand box body and a vacuum tube disposed within the sand box body. The top of the sand box body has a top vacuum chamber, and the top end of the vacuum tube is connected to the top vacuum chamber. The exterior of the sand box body has a vacuum channel and a vacuum port for vacuuming. One end of the vacuum channel is connected to the top vacuum chamber, and the vacuum port is located at the other end of the vacuum channel. This vacuum sand box for lost foam casting has a reasonable structural design. The vacuum chamber is located at the top of the sand box, and vacuuming begins from the top. The vacuum airflow direction is upward, which reduces the risk of box collapse and facilitates venting during pouring, thus improving the quality of the casting.

[0004] Existing lost foam vacuum casting anti-leakage devices require ensuring the airtightness of the casing during use, but common devices are extremely inconvenient to seal. Therefore, to address the above problems, a lost foam vacuum casting anti-leakage device adapted to resin sand molds is proposed. 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 leak-proof device for lost foam vacuum casting adapted to resin sand molds.

[0006] The technical solution adopted by this utility model to solve its technical problem is: a leak-proof device for lost foam casting vacuum casting adapted to resin sand molds, including a lost foam sand box body, a sand box base fixedly connected to the bottom of the lost foam sand box body, an electric air pump installed on one side of the lost foam sand box body, the output end of the electric air pump connected to a rubber flexible air pipe, a sealing body fixedly connected to the top of the lost foam sand box body, a connecting pipe fixedly connected to one side of the sealing body, the connecting pipe communicating with the rubber flexible air pipe, a telescopic rod fixedly connected to the inner bottom wall of the sealing body, a sealing strip fixedly connected to the top of the telescopic rod, the sealing strip slidably connected to the inner surface wall of the sealing body, and a rubber pad fixedly connected to the top of the sealing strip, the rubber pad being made of synthetic rubber.

[0007] Preferably, the outer wall of the sealing body is fixedly connected to a plug-in limiting hoop, the inner wall of the plug-in limiting hoop is slidably connected to a limiting rod, a limiting groove is formed on one side of the limiting rod, and a sand box sealing rubber gasket is fixedly connected to the top of the limiting groove.

[0008] Preferably, a limiting block is fixedly connected to one side of the sealing body, and a guide rail is fixedly connected to the bottom of the limiting block.

[0009] Preferably, a locking block is slidably connected to the top of the guide rail, and a sliding rod is fixedly connected to one side of the locking block.

[0010] Preferably, the slide rod is slidably connected to the inner surface wall of the limiting block, and a pressing block is fixedly connected to one side of the slide rod.

[0011] Preferably, the locking block is fixedly connected to a return spring via a limiting block, and the locking block is inserted into one side of the limiting rod.

[0012] Preferably, the top of the sand box sealing rubber gasket is connected to a casting groove, and the top of the sand box sealing rubber gasket is connected to a vacuum tube.

[0013] The advantages of this utility model are:

[0014] This invention, by setting up a sealing body and using an electric air pump to draw gas into the interior of the sealing body, causes the sealing strip and rubber gasket to be lifted by the air pressure, so that the sealing strip contacts the cover and maintains a seal, achieving the effect of convenient auxiliary sealing of the sand box and solving the problem of inconvenient sealing of the sand box.

[0015] This utility model sets a limiting block, allowing the limiting rod to be inserted into the plug-in limiting hoop for limiting, and the set snap-fit ​​block can lock the limiting rod on one side, achieving the effect of assisting in closing the sand box, thus solving the problem of inconvenient closure of the cover of the traditional device. Attached Figure Description

[0016] 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.

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the structure of the sand box base of this utility model;

[0019] Figure 3 This is a schematic diagram of the main structure of the lost foam casting sand box of this utility model;

[0020] Figure 4 This is a cross-sectional view of the sealing body of this utility model;

[0021] Figure 5 This is an enlarged view of section A of this utility model.

[0022] In the diagram: 1. Lost foam casting sand box body; 2. Sand box base; 3. Electric air pump; 4. Rubber flexible air pipe; 5. Sealing body; 6. Sand box sealing rubber gasket; 7. Casting tank; 8. Vacuum tube; 9. Limiting rod; 10. Insertion limiting clamp; 11. Telescopic rod; 12. Sealing strip; 13. Rubber gasket; 14. Limiting block; 15. Sliding rod; 16. Snap-fit ​​block; 17. Pressing block; 18. Guide rail; 19. Connecting pipe; 20. Return spring; 21. Limiting groove. Detailed Implementation

[0023] 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.

[0024] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0025] This application discloses a leak-proof device for lost foam vacuum casting adapted to resin sand molds. (Refer to...) Figure 2 and Figure 4The system includes a lost foam casting sand box body 1, a sand box base 2 fixedly connected to the bottom of the lost foam casting sand box body 1, an electric air pump 3 installed on one side of the lost foam casting sand box body 1, the output end of the electric air pump 3 connected to a rubber flexible air tube 4, a sealing body 5 fixedly connected to the top of the lost foam casting sand box body 1, a connecting pipe 19 fixedly connected to one side of the sealing body 5, the connecting pipe 19 communicating with the rubber flexible air tube 4, a telescopic rod 11 fixedly connected to the inner bottom wall of the sealing body 5, a sealing strip 12 fixedly connected to the top of the telescopic rod 11, and the sealing strip 12 slidably connected to the sealing body 5. The inner wall of the sealing strip 12 is fixedly connected to the top of the sealing strip 12 with a rubber pad 13. The rubber pad 13 is made of synthetic rubber. The electric air pump 3 is set so that after the electric air pump 3 is powered from the outside, air can enter the interior of the sealing body 5 along the rubber soft air tube 4, so that the air pressure inside the sealing body 5 rises. When the air pressure inside the sealing body 5 rises, the sealing strip 12 and the rubber pad 13 can rise synchronously until the sealing strip 12 and the rubber pad 13 contact the cover, thereby realizing the function of sealing the gap between the sand box rubber pad 6 and the box body.

[0026] Reference Figure 4 and Figure 5 The outer wall of the sealing body 5 is fixedly connected to a plug-in limiting hoop 10, and the inner wall of the plug-in limiting hoop 10 is slidably connected to a limiting rod 9. A limiting groove 21 is opened on one side of the limiting rod 9, and a sand box sealing rubber gasket 6 is fixedly connected to the top of the limiting groove 21. The sand box sealing rubber gasket 6 is set so that it can play an auxiliary sealing role after closing, and the limiting rod 9 can be inserted into the inside of the plug-in limiting hoop 10 for limiting.

[0027] Reference Figure 4 and Figure 5 A limiting block 14 is fixedly connected to one side of the sealing body 5, and a guide rail 18 is fixedly connected to the bottom of the limiting block 14. The limiting block 14 is set so that it can play the role of assisting in locking the sand box sealing rubber gasket 6, and the guide rail 18 can play the role of assisting in limiting and guiding.

[0028] Reference Figure 4 and Figure 5 A snap-fit ​​block 16 is slidably connected to the top of the guide rail 18. A slide rod 15 is fixedly connected to one side of the snap-fit ​​block 16. The snap-fit ​​block 16 is set so that it can slide on the top of the guide rail 18. The snap-fit ​​block 16 can be inserted into the limiting groove 21 opened on one side of the limiting rod 9 for limiting.

[0029] Reference Figure 4 and Figure 5The slide bar 15 is slidably connected to the inner surface of the limiting block 14. A pressing block 17 is fixedly connected to one side of the slide bar 15. The slide bar 15 is configured so that after the locking block 16 moves, it can drive the slide bar 15 to slide inside the limiting block 14. The pressing block 17 can be manually pushed by the user to disengage the locking block 16 from the limiting rod 9.

[0030] Reference Figure 4 and Figure 5 The snap-fit ​​block 16 is fixedly connected to the reset spring 20 via the limiting block 14. The snap-fit ​​block 16 is inserted into one side of the limiting rod 9. The reset spring 20 is set so that when the snap-fit ​​block 16 moves, the reset spring 20 is compressed, so that the snap-fit ​​block 16 can actively reset after moving.

[0031] Reference Figure 1 and Figure 2 The top of the sand box sealing rubber gasket 6 is connected to the casting tank 7, and the top of the sand box sealing rubber gasket 6 is connected to the vacuum tube 8. Through the casting tank 7 and the vacuum tube 8, the device can be cast using the casting tank 7, and the vacuum tube 8 can be connected to a vacuum pump to achieve the purpose of vacuuming.

[0032] Working principle: An electric air pump 3, powered by an external source, allows air to enter the sealing body 5 via the rubber flexible air tube 4, increasing the internal air pressure. This pressure rises the sealing strip 12 and rubber gasket 13, causing them to rise synchronously until they contact the cover. This seals the gap between the sand box sealing rubber gasket 6 and the box body. The sand box sealing rubber gasket 6 provides an auxiliary seal after closure. A limiting rod 9 inserts into the limiting clamp 10 for positioning. A limiting block 14 further assists in locking the sand box sealing rubber gasket 6. The guide rail 18 also serves to... The device serves as an auxiliary limiting guide. The locking block 16 allows it to slide at the top of the guide rail 18 and can be inserted into the limiting groove 21 on one side of the limiting rod 9 for limiting. The sliding rod 15 allows the locking block 16 to slide within the limiting block 14 after movement. The pressing block 17 allows the locking block 16 to disengage from the limiting rod 9 when manually pushed by the user. The return spring 20 compresses the locking block 16 after movement, allowing it to actively reset. The casting tank 7 and vacuum tube 8 allow the device to be cast using the casting tank 7, and the vacuum tube 8 can be connected to a vacuum pump to achieve vacuuming.

[0033] 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 leak-proof device for lost foam vacuum casting adapted to resin sand molds, comprising a lost foam sand box body (1), characterized in that: The bottom of the lost foam sand box body (1) is fixedly connected to a sand box base (2). An electric air pump (3) is installed on one side of the lost foam sand box body (1). The output end of the electric air pump (3) is connected to a rubber soft air pipe (4). A sealing body (5) is fixedly connected to the top of the lost foam sand box body (1). A connecting pipe (19) is fixedly connected to one side of the sealing body (5). The connecting pipe (19) is connected to the rubber soft air pipe (4). A telescopic rod (11) is fixedly connected to the inner bottom wall of the sealing body (5). A sealing strip (12) is fixedly connected to the top of the telescopic rod (11). The sealing strip (12) is slidably connected to the inner surface wall of the sealing body (5). A rubber pad (13) is fixedly connected to the top of the sealing strip (12). The rubber pad (13) is made of synthetic rubber.

2. The anti-leakage device for lost foam vacuum casting adapted to resin sand molds according to claim 1, characterized in that: The outer wall of the sealing body (5) is fixedly connected to a plug-in limiting hoop (10), and the inner wall of the plug-in limiting hoop (10) is slidably connected to a limiting rod (9). A limiting groove (21) is opened on one side of the limiting rod (9), and a sand box sealing rubber gasket (6) is fixedly connected to the top of the limiting groove (21).

3. The anti-leakage device for lost foam casting with vacuum casting adapted to resin sand molds according to claim 1, characterized in that: A limiting block (14) is fixedly connected to one side of the sealing body (5), and a guide rail (18) is fixedly connected to the bottom of the limiting block (14).

4. The anti-leakage device for lost foam casting with resin sand molds according to claim 3, characterized in that: A snap-fit ​​block (16) is slidably connected to the top of the guide rail (18), and a slide rod (15) is fixedly connected to one side of the snap-fit ​​block (16).

5. A leak-proof device for lost foam casting with vacuum casting adapted to resin sand molds according to claim 4, characterized in that: The slide rod (15) is slidably connected to the inner surface wall of the limiting block (14), and a pressing block (17) is fixedly connected to one side of the slide rod (15).

6. The anti-leakage device for lost foam vacuum casting adapted to resin sand molds according to claim 4, characterized in that: The snap-fit ​​block (16) is fixedly connected to a return spring (20) via a limiting block (14), and the snap-fit ​​block (16) is inserted into one side of the limiting rod (9).

7. A leak-proof device for lost foam casting with vacuum casting adapted to resin sand molds according to claim 2, characterized in that: The top of the sand box sealing rubber gasket (6) is connected to a casting groove (7), and the top of the sand box sealing rubber gasket (6) is connected to a vacuum tube (8).

Images