Automatic dewaxing equipment and process for investment casting water glass membrane shell

Abstract

The invention discloses an automatic dewaxing device and process for an investment casting water glass membrane shell, the device comprises a box body, the outer wall of the box body is provided with a piece placing opening and a dewaxing opening which are communicated with each other from top to bottom, the box body is internally and movably provided with a carrier plate corresponding to the dewaxing opening in position, and the box body is provided with a first action mechanism and a second action mechanism; when the door plate moves downwards to seal the part containing opening, the first action mechanism is used for guiding the carrier plate to be obliquely lifted, and the lower end of an obliquely lifted plate body of the carrier plate corresponds to the input end of the dewaxing opening in position. According to the invention, through the first action mechanism and the second action mechanism arranged in the box body, when the door plate is moved downwards to close the piece placing port, the initially horizontal support plate can be automatically lifted to be inclined, so that the piece placing port can be closed, and the piece placing port can be closed by the door plate, and therefore, the piece placing port can be closed, and the piece placing port can be closed. And clamping and positioning of the membrane shell are synchronously achieved, accidental falling of the membrane shell during dewaxing operation is avoided, and it is guaranteed that the dewaxing operation is carried out smoothly.

Description

Technical Field

[0001] The invention relates to the technical field of water glass membrane shell production, in particular to automatic dewaxing equipment and process for investment casting water glass membrane shell. Background Art

[0002] Investment casting is a precision casting technology widely used in the production of complex metal castings. Water glass shell is a common shell material in investment casting, and automatic dewaxing is an important step in the casting process.

[0003] In the investment casting process, the wax pattern is the original model of the casting. After the water glass film shell is coated and hardened, the wax pattern must be removed to form a cavity in the mold shell, the shape of which is consistent with the shape of the desired casting. In this way, when the molten metal is poured, the metal can fill the entire cavity to form the casting, and the removal of the wax pattern can ensure the integrity and uniformity of the mold shell, avoiding cracks or deformation of the mold shell due to the residual wax pattern at high temperature, thereby ensuring the dimensional accuracy and surface finish of the casting.

[0004] If the wax pattern remains in the shell, it may burn or gasify during the pouring process, causing defects such as pores and inclusions inside the casting, affecting the quality and performance of the casting. In addition, the removed wax can be recycled, which not only reduces material costs, but also reduces resource waste, and can be used again to make wax patterns.

[0005] The traditional dewaxing method for cast water glass membrane shells is to place the membrane shells directly on the dewaxing tray in the heating box. Since the bottom of one side of the dewaxing tray is padded with refractory bricks, the dewaxing tray is always in a tilted state. When placing membrane shells of different shapes and qualities, due to the different centers of gravity, there is a risk of slipping, falling and being damaged, which affects the progress of subsequent dewaxing operations. Summary of the invention

[0006] In order to solve the technical problems raised in the above background technology, the present invention provides an automatic dewaxing device and process for investment casting water glass membrane shell.

[0007] The present invention is implemented by the following technical scheme: an automatic dewaxing device for investment casting water glass membrane shell, comprising a box body, the outer wall of the box body is provided with a placement port and a dewaxing port which are connected to each other from top to bottom, a carrier plate corresponding to the position of the dewaxing port is movably arranged inside the box body, and a heating device for heating the membrane shell is arranged inside the box body,

[0008] A door panel capable of closing the component placement opening is vertically movably disposed in the box wall of the box body, and a first action mechanism and a second action mechanism are disposed on the box body.

[0009] When the door panel moves downward to close the component placement port, the first action mechanism is used to guide the carrier plate to tilt and lift, and the lower end of the tilted and lifted plate of the carrier plate corresponds to the input end position of the dewaxing port;

[0010] The second action mechanism is driven by the tilting and lifting action of the carrier plate and is used to clamp and fix the membrane shell placed on the carrier plate.

[0011] As a further improvement of the above solution, the heating device is an electric heating resistance wire suspended on the top wall of the box.

[0012] As a further improvement of the above solution, air holes are provided on the top of the box body.

[0013] As a further improvement of the above scheme, the first action mechanism includes a cylinder rotatably inserted on the bottom wall of the box body, the cylinder is vertically arranged and a push rod is threadedly inserted on the top, a limiting groove is provided at the end of the carrier plate away from the dewaxing port, and a limiting ball is provided on the top of the push rod for sliding engagement with the limiting groove, and a first transmission assembly is provided on the box body, and the first transmission assembly can guide the cylinder to rotate when the door panel moves downward.

[0014] As a further improvement of the above scheme, the first transmission assembly includes a pulley that is sleeved and fixed on the outside of the cylinder, and a pull rope in a tensioned state is wound around the pulley. The cylinder is installed on the bottom wall of the box body through a coil spring and a corresponding coil hole, and the free end of the pull rope is connected to the top of the door panel. A receiving groove that is compatible with the door panel is opened inside the side wall of the box body.

[0015] As a further improvement of the above solution, tension wheels for the pull rope to pass around are provided at corresponding corners in the box wall.

[0016] As a further improvement of the above solution, a fixed shaft is fixed on the inner wall of the box body, and one end of the carrier plate close to the dewaxing port is rotatably sleeved on the fixed shaft.

[0017] As a further improvement of the above scheme, the second action mechanism includes support plates relatively arranged on both sides of the carrier plate, and the opposite sides of the two support plates are connected with clamping plates through connecting rods, and a clamping space for clamping and fixing the membrane shell is formed between the two clamping plates. A second transmission assembly is arranged on the carrier plate, and the second transmission assembly is driven by the rotation action of the carrier plate to tilt and lift around a fixed axis, and is used to adjust the clamping distance between the two clamping plates.

[0018] As a further improvement of the above scheme, the second transmission assembly includes two side plates relatively fixed on both sides of the carrier plate, a rotating shaft is rotatably inserted on the side plate, a fixed tooth is sleeved and fixed on the fixed shaft, a movable tooth is sleeved and fixed on the rotating shaft, the movable tooth can move circumferentially around the fixed tooth and rotate by meshing with the fixed tooth, a first sprocket is sleeved on the rotating shaft, a screw rod is rotatably inserted on the carrier plate, a second sprocket is sleeved on the screw rod, the two sprockets are connected by a chain transmission, one of the support plates is fixed on the outer wall of the corresponding side plate, the other support plate is threadedly sleeved on the outside of the screw rod, and a telescopic rod is arranged between the support plate and the corresponding side plate.

[0019] The present invention also provides an automatic dewaxing process for investment casting water glass membrane shell applied to the above-mentioned equipment, comprising the following steps:

[0020] S1, placing the membrane shell on a horizontal carrier plate in the box through the placement opening; moving the door plate downward to close the placement opening, so as to tilt and lift the carrier plate through the first action mechanism and clamp and fix the membrane shell through the second action mechanism;

[0021] S2, start the heating device to heat the mold shell, and after the wax attached to the outer surface of the mold shell is melted, it flows out completely through the inclined carrier plate to the dewaxing port;

[0022] S3. Turn off the heating device, move the door upward, and wait for the membrane shell to cool to room temperature before taking it out of the box. The dewaxing is completed.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] The automatic dewaxing equipment for investment casting water glass membrane shell of the present invention can automatically lift the initially horizontal carrier plate to an inclined state when the door plate is moved down to close the component placement opening through the first action mechanism and the second action mechanism arranged in the box body, and simultaneously realize the clamping and positioning of the membrane shell, so as to avoid accidental falling of the membrane shell during the dewaxing operation and ensure the smooth progress of the dewaxing operation.

[0025] The automatic dewaxing process for the investment casting water glass membrane shell of the present invention can efficiently and stably complete the dewaxing operation of the investment casting water glass membrane and is easy to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A schematic diagram of the cross-sectional structure of the carrier plate in the initial horizontal state in the device provided in Example 1 of the present invention;

[0027] Figure 2 It is a schematic diagram of the cross-sectional structure of the device of the present invention when the carrier plate is in a state of rotation, lifting and tilting;

[0028] Figure 3 for Figure 1 The enlarged structural diagram at A in the middle;

[0029] Figure 4 for Figure 1 A schematic diagram of the partial structure of the receiving slot on the middle box;

[0030] Figure 5 for Figure 1 Schematic diagram of the structure of the middle carrier board;

[0031] Figure 6 This is a process flow chart provided for Example 2 of the present invention.

[0032] Description of main symbols:

[0033] 1. Box body; 2. Carrier plate; 3. Part placement port; 4. Door panel; 5. Electric heating wire resistance; 6. Air hole; 7. Dewaxing port; 8. Tensioning wheel; 9. Wire wheel; 10. Cylinder body; 11. Push rod; 12. Limiting ball; 13. Limiting groove; 14. Fixed axis; 15. Fixed teeth; 16. Side plate; 17. Moving teeth; 18. Rotating shaft; 19. First sprocket; 20. Screw rod; 21. Second sprocket; 22. Support plate; 23. Telescopic rod; 24. Connecting rod; 25. Clamp plate; 26. Receiving groove. DETAILED DESCRIPTION

[0034] The present invention is further described below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form a new embodiment.

[0035] Example 1

[0036] Please combine Figures 1 to 5 The automatic dewaxing equipment for investment casting water glass membrane shell comprises a box body 1, the outer wall of the box body 1 is provided with a placement port 3 and a dewaxing port 7 which are connected to each other from top to bottom, a carrier plate 2 corresponding to the position of the dewaxing port 7 is movably arranged inside the box body 1, and a heating device for heating the membrane shell is arranged inside the box body 1.

[0037] A door panel 4 capable of closing a housing opening 3 is vertically movably disposed in the box wall of the box body 1. A first action mechanism and a second action mechanism are disposed on the box body 1.

[0038] When the door plate 4 moves down to close the component placement port 3, the first action mechanism is used to guide the carrier plate 2 to tilt and lift, and the lower end of the tilted and lifted plate of the carrier plate 2 corresponds to the input end position of the dewaxing port 7;

[0039] The second action mechanism is driven by the tilting and lifting action of the carrier plate 2 and is used to clamp and fix the membrane shell placed on the carrier plate 2.

[0040] The heating device is an electric heating resistance wire 5 suspended on the top wall of the box body 1.

[0041] The top of the box body 1 is provided with air holes 6 .

[0042] The first action mechanism includes a cylinder 10 rotatably inserted on the inner bottom wall of the box body 1, the cylinder 10 is vertically arranged and a push rod 11 is threadedly inserted on the top, a limiting groove 13 is arranged at the end of the carrier plate 2 away from the dewaxing port 7, and a limiting ball 12 is arranged on the top of the push rod 11 for slidingly engaging with the limiting groove 13. A first transmission assembly is arranged on the box body 1, and the first transmission assembly can guide the cylinder 10 to rotate when the door panel 4 moves downward.

[0043] The first transmission assembly includes a pulley 9 which is sleeved and fixed on the outside of the cylinder 10, and a tensioned pull rope is wound around the pulley 9. The cylinder 10 is installed on the inner bottom wall of the box body 1 through a coil spring and a corresponding coil hole. The free end of the pull rope is connected to the top of the door panel 4, and a receiving groove 26 adapted to the door panel 4 is opened inside the side wall of the box body 1.

[0044] Tensioning wheels 8 for the pull rope to pass around are arranged at corresponding corners in the box wall of the box body 1.

[0045] A fixed shaft 14 is fixed on the inner wall of the box body 1 , and one end of the carrier plate 2 close to the dewaxing port 7 is rotatably sleeved on the fixed shaft 14 .

[0046] The second action mechanism includes support plates 22 relatively arranged on both sides of the carrier plate 2, and the opposite sides of the two support plates 22 are connected with clamping plates 25 through connecting rods 24. A clamping space for clamping and fixing the membrane shell is formed between the two clamping plates 25. A second transmission assembly is arranged on the carrier plate 2. The second transmission assembly is driven by the rotation action of the carrier plate 2 being tilted and lifted around the fixed axis 14, and is used to adjust the clamping distance between the two clamping plates 25.

[0047] The second transmission assembly includes two side plates 16 relatively fixed on both sides of the carrier plate 2, a rotating shaft 18 is rotatably inserted on the side plate 16, a fixed tooth 15 is sleeved and fixed on the fixed shaft 14, a movable tooth 17 is sleeved and fixed on the rotating shaft 18, the movable tooth 17 can move circumferentially around the fixed tooth 15 and rotate by meshing with the fixed tooth 15, a first sprocket 19 is sleeved on the rotating shaft 18, a screw rod 20 is rotatably inserted on the carrier plate 2, a second sprocket 21 is sleeved on the screw rod 20, and the two sprockets are connected by chain transmission, one of the support plates 22 is fixed on the outer wall of the corresponding side plate 16, and the other support plate 22 is threadedly sleeved on the outside of the screw rod 20, and a telescopic rod 23 is arranged between the support plate 22 and the corresponding side plate 16.

[0048] The door panel 4 is provided with a handle.

[0049] The working principle of this embodiment:

[0050] When in use, the initial carrier plate 2 is in a horizontal state, the membrane shell is placed on the top of the carrier plate 2 through the placement port 3, and then the door plate 4 is moved down to close the placement port 3. During this period, the door plate 4 can drive the wire wheel 9 to rotate (spring deformation) through the pull rope, and the wire wheel 9 drives the cylinder 10 to rotate so that the cylinder 10 and the top rod 11 interact with each other, and under the limiting action of the limiting ball 12 and the limiting groove 13, the carrier plate 2 is driven to rotate, lift and tilt around the fixed axis 14, so that the wax attached to the surface of the subsequent membrane shell can be melted and transferred to the dewaxing port 7 through the carrier plate 2 to flow out. The lifting, tilting and rotating of the carrier plate 2 can also make the movable teeth 17 on the side plate 16 move and rotate around the outer circumference of the fixed teeth 15, so as to drive the rotating shaft 18 and the first sprocket 19. The first sprocket 19 drives the second sprocket 21 and the screw rod 20 to rotate through the chain, so that the screw rod 20 and the corresponding support plate 22 interact with each other in a threaded manner, and under the limiting action of the corresponding telescopic rod 23, the connecting rod 24 drives the clamping plate 25 to move toward the other clamping plate 25, so that the clamping and fixing of the membrane shell can be synchronously completed while the carrier plate 2 is lifted and tilted, so that the membrane shell can be dewaxed through the electric heating resistance wire 5 later.

[0051] Example 2

[0052] Please combine Figure 6 This embodiment is an automatic dewaxing process for investment casting water glass membrane shell applied to the equipment described in the above embodiment 1, comprising the following steps:

[0053] S1, preparation before dewaxing, placing the membrane shell on the horizontal carrier plate 2 in the box body 1 through the placement port 3, moving the door plate 4 downward to close the placement port 3, so as to complete the clamping and fixing of the membrane shell by the tilting and lifting of the carrier plate 2 through the first action mechanism and the second action mechanism;

[0054] S2, dewaxing treatment, start the heating device to heat the mold shell, and after the wax attached to the outer surface of the mold shell is melted, it flows out completely through the inclined carrier plate to the dewaxing port 7;

[0055] S3, after dewaxing, take out the parts, turn off the heating device, move up the door plate 4, wait for the membrane shell to cool to room temperature and take it out from the box 1, and the dewaxing is completed.

[0056] The above-mentioned embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. An automatic dewaxing device for investment casting water glass membrane shell, characterized in that: The invention comprises a box body, wherein the outer wall of the box body is provided with a component placement port and a dewaxing port which are connected to each other from top to bottom, a carrier plate corresponding to the position of the dewaxing port is movably arranged inside the box body, and a heating device for heating the film shell is arranged inside the box body, A door panel capable of closing the component placement opening is vertically movably disposed in the box wall of the box body, and a first action mechanism and a second action mechanism are disposed on the box body. When the door panel moves downward to close the component placement port, the first action mechanism is used to guide the carrier plate to tilt and lift, and the lower end of the tilted and lifted plate of the carrier plate corresponds to the input end position of the dewaxing port; The second action mechanism is driven by the tilting and lifting action of the carrier plate and is used to clamp and fix the membrane shell placed on the carrier plate.

2. The automatic dewaxing equipment for investment casting water glass membrane shell according to claim 1, characterized in that: The heating device is an electric heating resistance wire suspended on the top wall of the box body.

3. The automatic dewaxing equipment for investment casting water glass membrane shell according to claim 1, characterized in that: The top of the box body is provided with air holes.

4. The automatic dewaxing equipment for investment casting water glass membrane shell according to claim 1, characterized in that: The first action mechanism includes a cylinder rotatably inserted on the bottom wall of the box body, the cylinder is vertically arranged and a push rod is threadedly inserted on the top, a limiting groove is arranged at the end of the carrier plate away from the dewaxing port, and a limiting ball is arranged on the top of the push rod and is slidably engaged with the limiting groove. A first transmission assembly is arranged on the box body, and the first transmission assembly can guide the cylinder to rotate when the door panel moves downward.

5. The automatic dewaxing equipment for investment casting water glass membrane shell according to claim 4, characterized in that: The first transmission assembly includes a pulley that is sleeved and fixed on the outside of the cylinder, and a tensioned pull rope is wound around the pulley. The cylinder is installed on the bottom wall of the box body through a coil spring and a corresponding coil hole. The free end of the pull rope is connected to the top of the door panel, and a receiving groove that is compatible with the door panel is opened inside the side wall of the box body.

6. The automatic dewaxing equipment for investment casting water glass membrane shell according to claim 5, characterized in that: Tension wheels for the pull rope to pass around are arranged at corresponding corners in the box wall of the box body.

7. The automatic dewaxing equipment for investment casting water glass membrane shell according to claim 5, characterized in that: A fixed shaft is fixed on the inner wall of the box body, and one end of the carrier plate close to the dewaxing port is rotatably sleeved on the fixed shaft.

8. The automatic dewaxing equipment for investment casting water glass membrane shell according to claim 7, characterized in that: The second action mechanism includes support plates relatively arranged on both sides of the carrier plate, and the opposite sides of the two support plates are connected with clamping plates through connecting rods, and a clamping space for clamping and fixing the membrane shell is formed between the two clamping plates. A second transmission assembly is arranged on the carrier plate, and the second transmission assembly is driven by the rotation action of the carrier plate tilting and lifting around a fixed axis, and is used to adjust the clamping distance between the two clamping plates.

9. The automatic dewaxing equipment for investment casting water glass membrane shell according to claim 8, characterized in that: The second transmission assembly includes two side plates relatively fixed on both sides of the carrier plate, a rotating shaft is rotatably inserted on the side plate, a fixed tooth is sleeved and fixed on the fixed shaft, a movable tooth is sleeved and fixed on the rotating shaft, the movable tooth can move circumferentially around the fixed tooth and rotate by meshing with the fixed tooth, a first sprocket is sleeved on the rotating shaft, a screw rod is rotatably inserted on the carrier plate, a second sprocket is sleeved on the screw rod, the two sprockets are connected by chain transmission, one of the support plates is fixed on the outer wall of the corresponding side plate, the other support plate is threadedly sleeved on the outside of the screw rod, and a telescopic rod is arranged between the support plate and the corresponding side plate.

10. An automatic dewaxing process for investment casting water glass membrane shell applied to the equipment as claimed in claim 1, characterized in that: The steps include: S1, placing the membrane shell on a horizontal carrier plate in the box through the placement opening; moving the door plate downward to close the placement opening, so as to tilt and lift the carrier plate through the first action mechanism and clamp and fix the membrane shell through the second action mechanism; S2, start the heating device to heat the mold shell, and after the wax attached to the outer surface of the mold shell is melted, it flows out completely through the inclined carrier plate to the dewaxing port; S3. Turn off the heating device, move the door upward, and wait for the membrane shell to cool to room temperature before taking it out of the box. The dewaxing is completed.

Images