A wax liquid recovery device for investment casting

Abstract

The utility model relates to the technical field of precision casting, in particular to a wax liquid recovery device for investment casting, which can move the mold shell out of the dewaxing box when the mold shell is taken out after dewaxing is completed, avoids taking out the mold shell in the high-temperature chamber of the dewaxing box, facilitates taking out the mold shell, and improves convenience and practicality; it comprises a bottom plate, a dewaxing box and a sliding door, the dewaxing box is fixedly installed on the bottom plate, a chamber is arranged in the dewaxing box, the upper portion of the dewaxing box is provided with a taking and placing opening in communication with the chamber, the sliding door is installed at the taking and placing opening of the dewaxing box, the lower portion of the sliding door is provided with a discharge pipe in communication with the chamber, and a valve is arranged on the discharge pipe; further comprising a screen plate, a moving mechanism and a heating mechanism, the heating mechanism is installed at the upper portion of the chamber of the dewaxing box, the heating mechanism has the function of heating, and the screen plate is slidably installed in the chamber of the dewaxing box.

Description

Technical Field

[0001] This utility model relates to the technical field of precision casting, and in particular to a wax recovery device for investment casting. Background Technology

[0002] In the process of wax pattern investment casting, a wax injection machine is first used to inject medium-temperature wax into the mold to form the shape of the workpiece. Then, the wax part is attached to the mold head through the tree assembly process. Next, a shell is attached to the surface of the wax part and the mold head through the shell making process, and a sprue cup is set on the surface of the shell. Then, the shell is heated through the dewaxing process, so that the wax part inside the shell is heated to form molten wax. The molten wax is then collected at the sprue cup of the shell. Finally, the molten metal is poured into the shell to form a metal workpiece.

[0003] Currently, dewaxing machines are generally used in the dewaxing process to recover the molten wax from the mold shell. The dewaxing machine contains a screen plate with a collection box underneath, and a heating mechanism. To recover the molten wax, the operator first opens the dewaxing machine, then places the mold shell upside down on the screen plate inside, closes the sealing cover, and then heats the mold shell on the screen plate, causing the wax inside to liquefy. The liquefied wax falls onto the screen plate and is collected in the collection box. However, this method has the following problems: after dewaxing, when the mold shell needs to be removed from the dewaxing machine, the high temperature inside makes it inconvenient for the operator to directly remove the shell, resulting in inconvenient material removal. Therefore, a dewaxing device that facilitates the removal of the mold shell is needed. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model provides a wax recovery device for investment casting that allows the mold shell to be removed from the dewaxing chamber after dewaxing is completed, thus avoiding the need for workers to remove the mold shell from the high-temperature chamber of the dewaxing chamber. This facilitates the removal of the mold shell and improves convenience and practicality.

[0005] This utility model discloses a wax recovery device for investment casting, comprising a base plate, a dewaxing tank, and a sliding door. The dewaxing tank is fixedly installed on the base plate and contains a chamber. An inlet / outlet communicating with the chamber is located at the top of the dewaxing tank. The sliding door is installed at the inlet / outlet of the dewaxing tank, and a discharge pipe communicating with the chamber is located at the bottom of the sliding door, with a valve installed on the discharge pipe. The device also includes a screen plate, a moving mechanism, and a heating mechanism. The heating mechanism is installed at the top of the dewaxing tank chamber and provides heating. The screen plate is slidably installed within the dewaxing tank chamber. The moving mechanism is installed on both the dewaxing tank and the screen plate and is used to move the screen plate back and forth. When recovering wax from the mold shells, multiple mold shells are first placed upside down on the screen plate, with the pouring cups facing downwards. Then, the sliding door is closed, and the valve at the top of the dewaxing tank chamber is opened. The heating mechanism heats the mold shell, causing the wax inside to liquefy. The liquefied wax flows out through the pouring cup on the mold shell, then passes through the screen and falls into the lower part of the dewaxing chamber. After dewaxing is complete, the sliding door is opened, followed by the moving mechanism. The moving mechanism moves the screen forward, allowing it to be removed through the loading / unloading port at the top of the dewaxing chamber. This, in turn, moves the mold shell out of the dewaxing chamber. The worker then removes the dewaxed mold shell from the screen and opens the valve on the discharge pipe at the bottom of the dewaxing chamber, allowing the liquefied wax in the lower part of the chamber to be discharged and collected. Removing the dewaxed mold shell from the dewaxing chamber avoids the worker having to remove it from the high-temperature chamber, making removal easier and improving convenience and practicality.

[0006] Preferably, the moving mechanism includes two sets of support plates, a hydraulic cylinder, and a push rod. The two sets of support plates are fixedly installed on the left and right sides of the dewaxing chamber, respectively. Each set of support plates is provided with a sliding groove. The left and right parts of the screen plate are slidably installed in the sliding grooves of the two sets of support plates. The hydraulic cylinder is fixedly installed at the rear end of the dewaxing chamber. The power output end of the hydraulic cylinder is connected to the push rod. The push rod is slidably installed on the dewaxing chamber. The screen plate is fixedly installed at the front end of the push rod. When the screen plate is moved back and forth, the hydraulic cylinder is opened. The hydraulic cylinder drives the push rod to move in the back and forth direction. The push rod drives the screen plate to move back and forth. When the shell is removed from the screen plate, the screen plate can be moved forward to move the screen plate out of the dewaxing chamber, which facilitates the removal of the shell from the screen plate.

[0007] Preferably, it also includes a support plate, a servo cylinder, a sliding rod, a sliding lever, a connecting plate, and a scraping mechanism. The support plate is fixedly mounted on the base plate, the servo cylinder is fixedly mounted on the right end of the support plate, the sliding rod and the sliding lever are both slidably mounted on the support plate, the connecting plate is fixedly mounted on the left end of the sliding rod and the sliding lever, the power output end of the servo cylinder is connected to the sliding rod, and the scraping mechanism is installed at the lower end of the connecting plate. The scraping mechanism has a scraping function. When dewaxing the shell on the screen, some of the wax will remain on the upper end of the screen as it passes through. When using the dewaxing chamber, residual wax on the upper part of the screen plate will solidify there. To clean this solidified wax, first move the screen plate forward so it exits the chamber. Then, bring the scraping mechanism into contact with the upper part of the screen plate. Next, activate the servo cylinder. The servo cylinder causes the sliding rod to move the connecting plate to the left. The connecting plate then moves the scraping mechanism to the left. As the scraping mechanism moves to the left, it scrapes off the solidified wax from the upper part of the screen plate, facilitating the cleaning of residual wax. This method is convenient and highly practical.

[0008] Preferably, the scraping mechanism includes a screw, a guide rod, and a scraper. The screw is screwed onto a connecting plate, the guide rod is slidably mounted on the connecting plate, the scraper is fixedly mounted on the lower end of the guide rod, and the lower end of the screw is rotatably mounted on the scraper. When cleaning the wax on the upper end of the screen, the screen is first moved forward so that the lower end of the screen is below the scraper. Then, the operator rotates the screw, which causes the scraper to descend, so that the lower end of the scraper contacts the upper end of the screen. Then, the servo cylinder is activated, and the servo cylinder moves the guide rod and the screw to the left via a sliding rod, which in turn moves the scraper to the left. During the leftward movement, the scraper scrapes off the solidified wax on the upper end of the screen, facilitating the cleaning of the screen.

[0009] Preferably, the heating mechanism includes multiple electric heating lamps; all the electric heating lamps are installed in the upper part of the dewaxing chamber. When the mold shell is dewaxed in the upper part of the dewaxing chamber, the multiple electric heating lamps are turned on to heat the mold shell, so that the medium-temperature wax in the mold shell is heated and liquefied, which facilitates the recovery of the wax liquid in the mold shell.

[0010] Preferably, the lower part of the dewaxing chamber is provided with multiple heating plates, which are embedded in the side wall of the dewaxing chamber. When the wax liquid falls to the lower part of the dewaxing chamber, the power supply is turned on to the multiple heating plates, so that the multiple heating plates are heated and then the wax liquid in the lower part of the dewaxing chamber is heated through the side wall of the dewaxing chamber, so that the wax liquid is kept at a certain temperature and the wax liquid is prevented from cooling down and solidifying.

[0011] Preferably, it also includes a motor and a stirring shaft. The motor is fixedly installed at the left end of the dewaxing chamber, and the stirring shaft is rotatably installed on the dewaxing chamber. The left end of the stirring shaft is connected to the power output end of the motor, and the right part of the stirring shaft is located at the lower part of the dewaxing chamber. When the wax liquid in the lower part of the dewaxing chamber is heated, the motor is turned on, and the motor drives the stirring shaft to rotate, thereby promoting the movement of the wax liquid in the lower part of the dewaxing chamber, so that the wax liquid in the lower part of the dewaxing chamber is heated evenly and the risk of wax solidification is reduced.

[0012] Preferably, it also includes a filter screen, which is fixedly installed in the middle of the dewaxing chamber and located below the screen plate. With the above arrangement, the wax liquid passes through the screen plate and is filtered by the filter screen before falling into the lower part of the dewaxing chamber. The filter screen filters out the mold shell residue and other impurities mixed in the wax liquid, which facilitates the filtration of the wax liquid.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: when removing the dewaxed shell, the shell can be removed in the dewaxing box, avoiding the need for workers to remove the shell in the high-temperature chamber of the dewaxing box, which facilitates the removal of the shell and improves convenience and practicality. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the first isometric structure of this utility model; Figure 2 This is a schematic diagram of the second isometric structure of this utility model; Figure 3 It is a structural diagram of the scraping mechanism, servo electric cylinder, and sliding rod, etc. Figure 4 This is a structural diagram of the motor and stirring shaft; Figure 5 It is a structural schematic diagram of the support plate, mesh plate, and hydraulic cylinder, etc.

[0015] The following are labeled in the attached diagram: 1. Base plate; 2. Dewaxing box; 3. Sliding door; 4. Mesh plate; 5. Support plate; 6. Hydraulic cylinder; 7. Push rod; 8. Support plate; 9. Servo electric cylinder; 10. Sliding rod; 11. Sliding rod; 12. Connecting plate; 13. Screw; 14. Smooth rod; 15. Scraper; 16. Motor; 17. Stirring shaft; 18. Filter screen. Detailed Implementation

[0016] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. This utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to make the disclosure of this utility model more thorough and complete.

[0017] Example 1 like Figures 1 to 5The present invention relates to a wax recovery device for investment casting, comprising a base plate 1, a dewaxing tank 2, a sliding door 3, a screen plate 4, a moving mechanism, and a heating mechanism. The dewaxing tank 2 is fixedly installed on the base plate 1 and has a chamber inside. An opening for loading and unloading, communicating with the chamber, is located at the upper part of the dewaxing tank 2. The sliding door 3 is installed at the opening, and a discharge pipe communicating with the chamber is located at the lower part of the sliding door 3. A valve is installed on the discharge pipe. The heating mechanism is installed at the upper part of the chamber of the dewaxing tank 2 and has a heating function. The screen plate 4 is slidably installed in the chamber of the dewaxing tank 2. The moving mechanism is installed on the dewaxing tank 2 and the screen plate 4 and is used to move the screen plate 4 back and forth. When recovering wax from the mold shells, multiple mold shells are first placed upside down on the screen plate 4, with the pouring cups facing down. Then, the sliding door 3 is closed, and the upper part of the chamber of the dewaxing tank 2 is opened. The heating mechanism heats the mold shell, causing the wax inside to liquefy. The liquefied wax flows out through the pouring cup on the mold shell, then passes through the screen plate 4 and falls into the lower part of the dewaxing chamber 2. After dewaxing the mold shell, the sliding door 3 is opened, and then the moving mechanism is activated. The moving mechanism moves the screen plate 4 forward, allowing it to be removed through the loading / unloading port at the top of the dewaxing chamber 2. This moves the mold shell out of the dewaxing chamber 2. The worker then removes the dewaxed mold shell from the screen plate 4 and opens the valve on the discharge pipe at the bottom of the dewaxing chamber 2, allowing the liquefied wax in the lower part of the chamber to be discharged and collected. When removing the dewaxed mold shell, it can be removed from the dewaxing chamber 2, avoiding the need for the worker to remove the mold shell from the high-temperature chamber of the dewaxing chamber 2, thus facilitating the removal of the mold shell and improving convenience and practicality.

[0018] like Figure 1 and Figure 5 The moving mechanism includes two sets of support plates 5, a hydraulic cylinder 6, and a push rod 7. The two sets of support plates 5 are fixedly installed on the left and right sides of the dewaxing chamber 2, respectively. Each set of support plates 5 is provided with a sliding groove. The left and right parts of the screen plate 4 are slidably installed in the sliding grooves of the two sets of support plates 5. The hydraulic cylinder 6 is fixedly installed at the rear end of the dewaxing chamber 2. The power output end of the hydraulic cylinder 6 is connected to the push rod 7. The push rod 7 is slidably installed on the dewaxing chamber 2. The screen plate 4 is fixedly installed at the front end of the push rod 7. When the screen plate 4 is moved back and forth, the hydraulic cylinder 6 is opened. The hydraulic cylinder 6 drives the push rod 7 to move in the back and forth direction. The push rod 7 drives the screen plate 4 to move back and forth. When the shell is removed from the screen plate 4, the screen plate 4 can be moved forward, so that the screen plate 4 is removed from the chamber of the dewaxing chamber 2, which makes it easier to remove the shell from the screen plate 4.

[0019] like Figure 3It also includes a support plate 8, a servo cylinder 9, a sliding rod 10, a sliding rod 11, a connecting plate 12, and a scraping mechanism. The support plate 8 is fixedly installed on the base plate 1. The servo cylinder 9 is fixedly installed on the right end of the support plate 8. The sliding rod 10 and the sliding rod 11 are both slidably installed on the support plate 8. The connecting plate 12 is fixedly installed on the left end of the sliding rod 10 and the sliding rod 11. The power output end of the servo cylinder 9 is connected to the sliding rod 10. The scraping mechanism is installed at the lower end of the connecting plate 12 and has a scraping function. When dewaxing the shell on the screen plate 4, some of the wax will remain on the screen plate 4 as it passes through. At the top, when the dewaxing chamber 2 is not in use, the residual wax on the top of the screen plate 4 will solidify. When it is necessary to clean the solidified wax on the top of the screen plate 4, first move the screen plate 4 forward so that it moves out of the chamber of the dewaxing chamber 2. Then, make the scraping mechanism contact the top of the screen plate 4. Then, turn on the servo cylinder 9. The servo cylinder 9 causes the sliding rod 10 to drive the connecting plate 12 to move to the left. The connecting plate 12 drives the scraping mechanism to move to the left. During the leftward movement, the scraping mechanism scrapes off the solidified wax on the top of the screen plate 4, which facilitates the cleaning of the residual wax on the top of the screen plate 4. It is convenient to use and highly practical.

[0020] like Figure 1 and Figure 3 The scraping mechanism includes a screw 13, a polished rod 14, and a scraper 15. The screw 13 is screwed onto the connecting plate 12. The polished rod 14 is slidably mounted on the connecting plate 12. The scraper 15 is fixedly mounted on the lower end of the polished rod 14. The lower end of the screw 13 is rotatably mounted on the scraper 15. When cleaning the wax on the upper end of the screen plate 4, the screen plate 4 is first moved forward so that the lower end of the screen plate 4 is below the scraper 15. Then, the operator rotates the screw 13, which drives the scraper 15 to descend, so that the lower end of the scraper 15 contacts the upper end of the screen plate 4. Then, the servo cylinder 9 is activated. The servo cylinder 9 moves the connecting plate 12 to move the polished rod 14 and the screw 13 to the left through the sliding rod 10, which in turn moves the scraper 15 to the left. During the leftward movement, the scraper 15 scrapes off the solidified wax on the upper end of the screen plate 4, facilitating the cleaning of the screen plate 4.

[0021] The heating mechanism includes multiple electric heating lamps; all the electric heating lamps are installed in the upper part of the second chamber of the dewaxing box. When the mold shell is dewaxed in the upper part of the second chamber of the dewaxing box, the multiple electric heating lamps are turned on to heat the mold shell, so that the medium-temperature wax in the mold shell is heated and liquefied, which facilitates the recovery of the wax liquid in the mold shell.

[0022] Multiple heating plates are installed in the lower part of the second chamber of the dewaxing chamber, and these heating plates are embedded in the side wall of the second chamber. When the wax liquid falls into the lower part of the second chamber of the dewaxing chamber, the power supply is turned on to the multiple heating plates, so that the multiple heating plates are heated and then the wax liquid in the lower part of the second chamber of the dewaxing chamber is heated through the side wall of the second chamber of the dewaxing chamber, so that the wax liquid is kept at a certain temperature and the wax liquid is prevented from cooling down and solidifying.

[0023] like Figure 1 and Figure 4 It also includes a motor 16 and a stirring shaft 17. The motor 16 is fixedly installed on the left end of the dewaxing chamber 2, and the stirring shaft 17 is rotatably installed on the dewaxing chamber 2. The left end of the stirring shaft 17 is connected to the power output end of the motor 16, and the right part of the stirring shaft 17 is located in the lower part of the chamber of the dewaxing chamber 2. When the wax liquid in the lower part of the chamber of the dewaxing chamber 2 is heated, the motor 16 is turned on, and the motor 16 drives the stirring shaft 17 to rotate, thereby promoting the movement of the wax liquid in the lower part of the chamber of the dewaxing chamber 2, so that the wax liquid in the lower part of the chamber of the dewaxing chamber 2 is heated evenly, reducing the risk of wax solidification.

[0024] Example 2 Based on Embodiment 1, a filter screen 18 is also included. The filter screen 18 is fixedly installed in the middle of the dewaxing chamber 2 and is located below the screen plate 4. With the above arrangement, the wax liquid passes through the screen plate 4 and is filtered by the filter screen 18 before falling to the lower part of the dewaxing chamber 2. The filter screen 18 filters out the mold shell residue and other impurities mixed in the wax liquid, which facilitates the filtration of the wax liquid.

[0025] The dewaxing chamber 2 is equipped with temperature gauges at both the top and bottom. The temperature gauge at the top of the dewaxing chamber 2 is used to monitor the temperature of the upper part of the chamber, and the temperature gauge at the bottom of the dewaxing chamber 2 is used to detect the temperature of the wax liquid in the lower part of the chamber.

[0026] It should be added that: all electrical equipment in this case is connected to an external controller, which coordinates and controls the operation of each piece of electrical equipment.

[0027] The screen plate 4, hydraulic cylinder 6, servo electric cylinder 9, screw 13, scraper 15, stirring shaft 17 and filter screen 18 of the wax recovery device for investment casting of this utility model are all purchased from the market. Technical personnel in this industry only need to install and operate it according to the accompanying instruction manual, without requiring any creative work from those skilled in the art.

[0028] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A wax recovery device for investment casting, comprising a base plate (1), a dewaxing tank (2), and a sliding door (3), wherein the dewaxing tank (2) is fixedly installed on the base plate (1), the dewaxing tank (2) has a chamber, the upper part of the dewaxing tank (2) has a loading / unloading port communicating with the chamber, the sliding door (3) is installed at the loading / unloading port of the dewaxing tank (2), the lower part of the sliding door (3) has a discharge pipe communicating with the chamber, and a valve is provided on the discharge pipe; characterized in that, It also includes a screen plate (4), a moving mechanism and a heating mechanism. The heating mechanism is installed on the upper part of the dewaxing chamber (2) and has the function of heating. The screen plate (4) is slidably installed in the chamber of the dewaxing chamber (2). The moving mechanism is installed on the dewaxing chamber (2) and the screen plate (4) and is used to move the screen plate (4) back and forth.

2. The wax recovery device for investment casting as described in claim 1, characterized in that, The moving mechanism includes two sets of support plates (5), a hydraulic cylinder (6) and a push rod (7). The two sets of support plates (5) are fixedly installed on the left and right sides of the dewaxing chamber (2) respectively. Both sets of support plates (5) are provided with sliding grooves. The left and right parts of the mesh plate (4) are slidably installed in the sliding grooves of the two sets of support plates (5) respectively. The hydraulic cylinder (6) is fixedly installed at the rear end of the dewaxing chamber (2). The power output end of the hydraulic cylinder (6) is connected to the push rod (7). The push rod (7) is slidably installed on the dewaxing chamber (2) and the mesh plate (4) is fixedly installed at the front end of the push rod (7).

3. The wax recovery device for investment casting as described in claim 1, characterized in that, It also includes a support plate (8), a servo electric cylinder (9), a sliding rod (10), a sliding rod (11), a connecting plate (12), and a scraping mechanism. The support plate (8) is fixedly installed on the base plate (1). The servo electric cylinder (9) is fixedly installed on the right end of the support plate (8). The sliding rod (10) and the sliding rod (11) are both slidably installed on the support plate (8). The connecting plate (12) is fixedly installed on the left end of the sliding rod (10) and the sliding rod (11). The power output end of the servo electric cylinder (9) is connected to the sliding rod (10). The scraping mechanism is installed at the lower end of the connecting plate (12) and has a scraping function.

4. A wax recovery device for investment casting as described in claim 3, characterized in that, The scraping mechanism includes a screw (13), a polished rod (14), and a scraper (15). The screw (13) is screwed onto the connecting plate (12). The polished rod (14) is slidably mounted on the connecting plate (12). The scraper (15) is fixedly mounted on the lower end of the polished rod (14). The lower end of the screw (13) is rotatably mounted on the scraper (15).

5. A wax recovery device for investment casting as described in claim 1, characterized in that, The heating mechanism includes multiple electric heating lamps.

6. A wax recovery device for investment casting as described in claim 1, characterized in that, The lower part of the dewaxing chamber (2) is provided with multiple heating plates, which are embedded in the side wall of the dewaxing chamber (2).

7. A wax recovery device for investment casting as described in claim 1, characterized in that, It also includes a motor (16) and a stirring shaft (17). The motor (16) is fixedly installed on the left end of the dewaxing box (2), and the stirring shaft (17) is rotatably installed on the dewaxing box (2). The left end of the stirring shaft (17) is connected to the power output end of the motor (16), and the right part of the stirring shaft (17) is located in the lower part of the chamber of the dewaxing box (2).

8. A wax recovery device for investment casting as described in claim 1, characterized in that, It also includes a filter screen (18), which is fixedly installed in the middle of the dewaxing chamber (2) and is located below the screen plate (4).

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