Dewaxing device for investment casting
By designing a dewaxing device with a heating cylinder and a lifting air blowing head in the air guide pipe, the problems of low dewaxing efficiency and wax residue in investment casting were solved, achieving efficient melting of the wax pattern and cleaning of the inner wall of the mold, thus improving the quality of the cast products.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHOUSHAN HONGSHENG IND CO LTD
- Filing Date
- 2025-06-09
- Publication Date
- 2026-05-19
AI Technical Summary
In existing investment casting, the dewaxing efficiency is low and wax residue affects the quality of the cast products.
A dewaxing device was designed, comprising a heating cylinder, an annular turntable, a rotary gear, an air guide pipe, and an air blowing head. The heating cylinder heats the wax mold, and the annular turntable rotates the mold to ensure uniform heating. Combined with the lifting function of the air guide pipe and the air blowing head, the device achieves efficient melting of the wax mold and cleaning of its inner wall.
It improves dewaxing efficiency, ensures that the wax mold is completely melted and cleans the residual wax from the inner wall of the mold, and improves the quality of the cast products.
Smart Images
Figure CN224254160U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of investment casting technology, and in particular to a dewaxing device for investment casting. Background Technology
[0002] Investment casting, also known as lost-wax casting, includes processes such as wax pressing, wax repair, tree assembly, slurry application, wax melting, pouring molten metal, and post-processing. However, the existing investment casting dewaxing process is relatively slow, and residual wax will remain in the mold after dewaxing, affecting the quality of subsequent cast products. Utility Model Content
[0003] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a dewaxing device for investment casting, which solves the current pain points in this field.
[0004] The above-mentioned technical objective of this utility model is achieved through the following technical solution:
[0005] A dewaxing device for investment casting includes a dewaxing box, in which a heating cylinder is fixedly installed by a fixing frame, and a support is rotatably installed at the bottom of the dewaxing box, with the investment mold placed on the support facing downwards.
[0006] To further explain, an annular turntable is rotatably mounted at the bottom of the dewaxing box, the bracket is fixedly mounted on the annular turntable, a toothed ring is provided on the lower side of the annular turntable, a rotary gear is rotatably mounted at the bottom of the dewaxing box, the rotary gear meshes with the toothed ring on the annular turntable, a drive motor is fixedly mounted at the bottom of the dewaxing box, and the rotary gear is fixedly mounted on the shaft of the drive motor.
[0007] To further explain, the bottom of the dewaxing box is provided with a liquid collection tank, which is located below the support, and the outflowing wax liquid flows into the tank for collection.
[0008] To further explain, a duct is vertically slidably installed at the bottom of the dewaxing chamber. The duct is located below the support and has an air blowing head at the top. The bottom of the duct is connected to a gas delivery hose, which is connected to a hot air blower.
[0009] To further explain, the air blowing head is provided with an air nozzle with an opening on the side and a channel extending downward from the opening, and the lower end of the air nozzle is connected to the channel inside the air guide tube.
[0010] To further explain, a dual-axis motor is fixedly installed at the bottom of the dewaxing chamber. The two shafts of the dual-axis motor rotate in opposite directions and each is fixedly equipped with a push-pull wheel. The two push-pull wheels clamp the air guide tube, and the air guide tube can be raised and lowered by rotating the push-pull wheels.
[0011] In summary, the advantages of this utility model compared to the prior art are as follows: the casting port of the wax mold is placed on the support, and the wax mold can be melted and flowed out by heating it with a heating cylinder. At the same time, the rotation of the support drives the wax mold to rotate, making the mold more evenly heated. In addition, by extending the air blowing head into the mold through the lifting air pipe, hot air can be heated from the inside of the mold to heat the wax mold, and the wax adhering to the inner wall of the mold can be cleaned, increasing the efficiency and completeness of wax melting. Attached Figure Description
[0012] The above and other objects, features, and advantages of the present invention will become readily apparent from the following detailed description of exemplary embodiments, taken in conjunction with the accompanying drawings. Several embodiments of the present invention are illustrated in the drawings by way of example and not limitation, in which:
[0013] Figure 1 This is a schematic diagram of a dewaxing device for investment casting.
[0014] Figure 2 for Figure 1 A magnified view of a portion of point A in the middle.
[0015] Explanation of reference numerals in the attached drawings: 10. Dewaxing box; 11. Heating cylinder; 12. Support; 13. Annular turntable; 14. Liquid collection tank; 15. Rotary gear; 16. Drive motor; 17. Air guide pipe; 18. Air delivery hose; 19. Air blowing head; 20. Air nozzle; 21. Dual-axis motor; 22. Push-pull wheel. Detailed Implementation
[0016] The utility model will be further described in detail below with reference to the accompanying drawings.
[0017] A dewaxing device for investment casting includes a dewaxing chamber 10, in which a heating cylinder 11 is fixedly mounted via a bracket. An annular turntable 13 is rotatably mounted at the bottom of the dewaxing chamber 10, and a support 12 is fixedly mounted on the annular turntable 13. The investment mold's pouring port faces the support 12. Heating the mold with the heating cylinder 11 melts the wax and causes it to flow out. A toothed ring is provided on the lower side of the annular turntable 13, and a rotary gear 15 is rotatably mounted at the bottom of the dewaxing chamber 10. The 15 meshes with the gear ring on the annular turntable 13. The bottom of the dewaxing box 10 is fixedly installed with a drive motor 16. The rotary gear 15 is fixedly installed on the shaft of the drive motor 16. The drive motor 16 can drive the support 12 to rotate through the rotary gear 15 and the annular turntable 13, thereby driving the investment mold to rotate, making the mold more evenly heated. The bottom of the dewaxing box 10 is provided with a liquid collection tank 14, which is located below the support 12, and the flowing wax liquid flows into it for collection.
[0018] A duct 17 is vertically slidably installed at the bottom of the dewaxing box 10. The duct 17 is located below the support 12. An air blowing head 19 is provided at the top of the duct 17. An air nozzle 20 with an opening on the side and a channel extending downward from the opening is provided in the air blowing head 19. The lower end of the air nozzle 20 is connected to the channel inside the duct 17. The bottom end of the duct 17 is connected to a gas delivery hose 18. The gas delivery hose 18 is connected to a hot air blower. By raising and lowering the duct 17, the air blowing head 19 can be inserted into the mold, allowing hot air to heat the wax mold from inside the mold. At the same time, it can clean the wax adhering to the inner wall of the mold. The opening of the air blowing head 19 is located on the side to prevent dripping wax from entering the air blowing head 19 and causing blockage.
[0019] A dual-axis motor 21 is fixedly installed at the bottom of the dewaxing box 10. The two shafts of the dual-axis motor 21 rotate in opposite directions and each is fixedly installed with a push-pull wheel 22. The two push-pull wheels 22 clamp the air guide tube 17. By rotating the push-pull wheels 22, the air guide tube 17 can be driven to rise and fall.
[0020] The above description is merely an exemplary embodiment of the present utility model and is not intended to limit the scope of protection of the present utility model. The scope of protection of the present utility model is determined by the appended claims.
Claims
1. A dewaxing device for investment casting, characterized in that: It includes a dewaxing box (10), in which a heating cylinder (11) is fixedly installed by a fixing frame, and a bracket (12) is rotatably installed at the bottom of the dewaxing box (10), with the casting port of the investment mold placed on the bracket (12) facing downward.
2. The dewaxing device for investment casting according to claim 1, characterized in that: The bottom of the dewaxing box (10) is rotatably mounted with an annular turntable (13), and the bracket (12) is fixedly mounted on the annular turntable (13). A toothed ring is provided on the lower side of the annular turntable (13). A rotary gear (15) is rotatably mounted on the bottom of the dewaxing box (10). The rotary gear (15) meshes with the toothed ring on the annular turntable (13). A drive motor (16) is fixedly mounted on the bottom of the dewaxing box (10), and the rotary gear (15) is fixedly mounted on the shaft of the drive motor (16).
3. The dewaxing device for investment casting according to claim 1, characterized in that: The bottom of the dewaxing box (10) is provided with a liquid collection tank (14), which is located below the support (12), and the outflowing wax liquid flows into it for collection.
4. The dewaxing device for investment casting according to claim 1, characterized in that: The dewaxing box (10) is vertically slidably installed with an air guide pipe (17) at the bottom. The air guide pipe (17) is located below the bracket (12). An air blowing head (19) is provided at the top of the air guide pipe (17). The bottom end of the air guide pipe (17) is connected to an air delivery hose (18). The air delivery hose (18) is connected to a hot air blower.
5. The dewaxing device for investment casting according to claim 4, characterized in that: The blowing head (19) is provided with a nozzle (20) with an opening on the side and a channel extending downward from the opening. The lower end of the nozzle (20) is connected to the channel inside the air guide tube (17).
6. The dewaxing device for investment casting according to claim 4, characterized in that: The bottom of the dewaxing box (10) is fixedly installed with a dual-axis motor (21). The two shafts of the dual-axis motor (21) rotate in opposite directions and each is fixedly installed with a push-pull wheel (22). The two push-pull wheels (22) clamp the air guide tube (17). By rotating the push-pull wheels (22), the air guide tube (17) can be driven to rise and fall.