Forming mold and method for swirler wax pattern

Abstract

The invention relates to the technical field of investment casting, in particular to a forming mold and method for a swirler wax pattern. The forming die and the movable block mounting seat are movably inserted into a central through hole of the upper die plate; a fixed core block is mounted at a central counter bore in the top surface of the lower template; the fixed core block comprises a body and a plurality of forming bodies integrally formed on the top surface of the body; a plurality of loose piece rods are movably inserted into the body; each loose piece rod is provided with a random loose piece and a fixed loose piece; the top of the fixed movable block is connected with the movable block mounting seat; the upper part of the loose piece rod, the forming body, the random loose piece and the fixed loose piece are jointly used for forming a spiral cavity between two adjacent blades on a swirler wax pattern; a first spiral surface is arranged on the random movable block, and a second spiral surface is arranged on the fixed movable block; the inclination direction of the first spiral face and the inclination direction of the second spiral face are the same as the inclination direction of a spiral cavity between every two adjacent blades on the swirler wax pattern. And the ejection structure is used for upwards ejecting the loose piece rod and the upper template.

Description

Technical Field

[0001] The invention relates to the technical field of investment casting, and in particular to a molding die and a molding method for a vortex flow generator wax pattern. Background Art

[0002] Investment casting, also known as lost wax casting, involves processes such as wax pressing, wax trimming, wax forming, slurry bonding, wax melting, molten metal pouring, and post-processing. Wax pressing is a crucial process in investment casting. The dimensional accuracy and roughness of the wax-pressed mold cavity directly impact the accuracy and roughness of the investment pattern, and thus the quality of the casting. The structure of the wax pattern and the quality of the investment pattern are closely related to production efficiency. Therefore, wax pressing is a key step in the investment casting process. The simpler the mold design, the higher the production efficiency.

[0003] Combine Figure 1 and 2 The figure shows a schematic diagram of the wax mold structure of the vortex generator, which includes an outer ring body 1, an inner ring body 2 and a plurality of blades 3. The inner ring body 2 is coaxially arranged inside the outer ring body 1, and a plurality of blades 3 are evenly distributed in the interval between the inner ring body 2 and the outer ring body. In the axial direction, since a single blade is spiral, the cavity between two adjacent blades 3 is spiral. When pressing, if an integral movable block is used in the spiral cavity, the integral movable block cannot be removed after pressing. Therefore, the method currently used for the vortex generator wax mold is to use a ceramic core to form the spiral cavity between two adjacent blades 3. The ceramic core will follow the wax mold into the next process until the casting is completed, and then an alkaline liquid will be used to separate the ceramic core from the casting.

[0004] However, the use of ceramic cores has the following problems: the separation time of the ceramic core and the casting is long, which leads to a longer production cycle and thus reduces production efficiency; and the ceramic core is prone to breakage during the production process, which affects the qualified rate of casting production. Summary of the Invention

[0005] The main purpose of the present invention is to provide a molding die and method for a vortex finder wax pattern, aiming to solve the above technical problems.

[0006] To achieve the above-mentioned objectives, the present invention provides, on the one hand, a molding die for a vortex finder wax pattern, comprising a lower template, an upper template, a movable block mounting seat, and an ejection mechanism; the movable block mounting seat is movably inserted into the central through hole of the upper template; a fixed core block is mounted at the central countersunk hole on the top surface of the lower template; the fixed core block comprises a main body and a plurality of molded bodies integrally formed on the top surface of the main body; a plurality of movable block rods are movably inserted into the main body; a movable block rod is disposed between two molded bodies; each movable block rod is equipped with a mold-following movable block and a fixed movable block; The top of the fixed movable block is connected to the movable block mounting seat; the upper part of the movable block rod is used together with the forming body, the follow-up movable block and the fixed movable block to form the spiral cavity between two adjacent blades on the vortex finder wax mold; a first spiral surface is provided on the follow-up movable block, and a second spiral surface for matching with the first spiral surface is provided on the fixed movable block; the inclination direction of the first spiral surface and the second spiral surface is the same as the inclination direction of the spiral cavity between two adjacent blades on the vortex finder wax mold; the ejection structure is used to lift the movable block rod and the upper template upward.

[0007] Preferably, two arc-shaped plates are installed on the top surface of the upper template; the two arc-shaped plates surround the movable block mounting seat; a flat hole is provided on each arc-shaped plate, and the flat hole is in a spiral ascending shape; the inclination angle of the mating surface between the fixed movable block and the follower movable block is the same as the inclination angle of the flat hole; a handle rod is arranged at each flat hole, and the handle rod is screwed onto the movable block mounting seat after passing through the flat hole.

[0008] Preferably, the fixed movable block and the follower movable block are made of ferromagnetic material; a first magnet is embedded on the first helical surface of the follower movable block; and a second magnet is embedded on the second helical surface of the fixed movable block.

[0009] Preferably, a first positioning groove is provided on the first helical surface of the movable follower; and a first positioning protrusion is integrally formed on the second helical surface of the movable fixed block, wherein the first positioning protrusion is used for slidingly plugging into the first positioning groove.

[0010] Preferably, a first docking plane is provided on the following movable block; a second positioning protrusion is provided on the first docking plane; a second docking plane is provided on the top of the movable block rod, and a second positioning groove is provided on the second docking plane; a V-shaped groove is provided on the top of the forming body; when the mold is closed, the first docking plane abuts against the second docking plane, and the second positioning protrusion is inserted into the second positioning groove; and the lower end of the fixed movable block abuts against the V-shaped groove.

[0011] Preferably, it also includes an inner hole forming column; a positioning column is integrally formed on the lower end surface of the inner hole forming column; a positioning hole is provided at the center position of the fixed core block; when the mold is closed, the inner hole forming column is inserted into the center hole of the movable block mounting seat, and the inner hole forming column and the center hole of the movable block mounting seat are slidably matched; the positioning column is inserted in the positioning hole, and the inner hole surface of the positioning hole is a conical surface, and the outer cylindrical surface of the positioning column is a conical surface.

[0012] Preferably, two guide blocks are fixedly installed on the top surface of the lower template, and the two guide blocks are spaced apart to form a slide groove; two peripheral surface forming blocks are slidably installed in the slide groove, and each peripheral surface forming block is provided with a semicircular forming groove; a wedge-shaped surface is provided on the peripheral surface forming block; two wedge-shaped blocks are installed on the lower surface of the upper template; when the mold is closed, the two wedge-shaped blocks respectively cooperate with the wedge-shaped surfaces of the two peripheral surface forming blocks to push the two peripheral surface forming blocks closer to each other, so that the two forming grooves are spliced ​​into a full circle shape.

[0013] Preferably, a T-shaped groove is provided on the lower template; a T-shaped slider is integrally formed on the bottom surface of the outer peripheral surface forming block; the T-shaped slider slides in cooperation with the T-shaped groove; an anti-slip limit groove is provided on the bottom surface of the T-shaped slider; a first screw is screwed on the lower template, and the upper end of the first screw extends into the anti-slip limit groove.

[0014] Preferably, the ejection structure includes a cam, a driving plate, a push rod and a rod seat; two support blocks are installed on the bottom surface of the lower template, and a bottom plate is commonly provided on the bottom surfaces of the two support blocks; a long screw is inserted into the bottom plate, and the long screw passes through the bottom plate and the support block from bottom to top and is tightened on the lower template; the driving plate is arranged at a position below the lower template; the lower ends of the push rod and the rod seat are fixed on the driving plate, and the upper end of the push rod passes through the lower template and the guide block in sequence; a driving shaft is rotatably installed between the two support blocks; the cam is tightened It is fixedly installed in the middle of the driving shaft, and the driving arc surface of the cam contacts the bottom surface of the driving plate; one end of the driving shaft extends out from the support block and is installed with a driving handle; a supporting platform is provided on the opposite inner wall surfaces of the two support blocks; a spring is sleeved on the ejector rod, and the upper end of the spring abuts on the lower template, and the lower end abuts on the driving plate; the lower end of the movable block rod passes through the main body and the lower template and is connected to the rod seat; when the ejection operation is not performed, the driving plate abuts on the supporting platform, and the top end of the ejector rod is flush with the top surface of the guide block.

[0015] On the other hand, the present invention also provides a method for molding a vortex finder wax pattern, using the above-mentioned molding die, comprising the following steps: S1. Place the mold after mold closing on the workbench of wax injection molding machine; S2, the wax material in the wax injection machine is injected into the cavity of the forming mold through the wax injection gun; S3. After cooling, the mold is opened. When opening the mold, the movable block mounting seat is first rotated so that the second helical surface of the fixed movable block and the first helical surface of the follower movable block slide relative to each other, so that the fixed movable block is pulled out of the vortex finder wax pattern; S4, using the ejection structure to push the movable block rod and the upper template upward, so that the movable block is ejected along with the vortex generator wax pattern and remains in the vortex generator wax pattern; S5. Separate the free-form pieces from the vortex generator wax pattern one by one to obtain a complete vortex generator wax pattern.

[0016] Due to the adoption of the above technical solution, the beneficial effects of the present invention are as follows: (1) In the molding die provided by the present invention, the upper portion of the movable block rod is used together with the forming body, the follow-up movable block, and the fixed movable block to form the spiral cavity between two adjacent blades on the vortex flow device wax mold. The forming body, the follow-up movable block, and the fixed movable block are split structures. When opening the mold, the movable block mounting seat is first rotated so that the second spiral surface of the fixed movable block and the first spiral surface of the follow-up movable block slide relative to each other, so that the fixed movable block is extracted from the vortex flow device wax mold. The movable block rod and the upper mold plate are lifted upward by the ejection structure, and the follow-up movable block is ejected together with the vortex flow device wax mold and remains in the vortex flow device wax mold. Thereafter, the follow-up movable blocks are separated from the vortex flow device wax mold one by one, and a complete vortex flow device wax mold is obtained. This overcomes the problem in the prior art that the separation time of the ceramic core and the casting is long, resulting in a longer production cycle and reduced production efficiency.

[0017] (2) In the molding die provided by the present invention, the problem of difficulty in installing the movable block and the fixed movable block is solved by using a magnetic attraction structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0019] Figure 1 Schematic diagram of the wax model structure of the vortex flowmeter Figure 1 ; Figure 2 Schematic diagram of the wax model structure of the vortex flowmeter Figure 2 ; Figure 3 Schematic diagram of the three-dimensional structure of the forming mold provided by the present invention Figure 1 ; Figure 4Schematic diagram of the three-dimensional structure of the forming mold provided by the present invention Figure 1 ; Figure 5 A top view of the forming mold provided by the present invention; Figure 6 for Figure 5 Middle BB cross-section; Figure 7 Schematic diagram of the structural decomposition of the forming mold provided by the present invention Figure 1 ; Figure 8 for Figure 7 Enlarged view of point A in the middle; Figure 9 Schematic diagram of the structural decomposition of the forming mold provided by the present invention Figure 2 ; Figure 10 Schematic diagram of partial structural decomposition of the molding die provided by the present invention Figure 1 ; Figure 11 Schematic diagram of partial structural decomposition of the molding die provided by the present invention Figure 2 ; Figure 12 A partial structural diagram of the molding die provided by the present invention; Figure 13 Schematic diagram of the structure of the fixed core block in the present invention; Figure 14 Schematic diagram of the structure of the movable block rod in the present invention; Figure 15 Schematic diagram of the structure of the lower template in the present invention; Figure 16 The three-dimensional structure of the movable block mounting seat in the present invention Figure 1 ; Figure 17 The three-dimensional structure of the movable block mounting seat in the present invention Figure 2 .

[0020] Explanation of the accompanying symbols: 1. Outer ring body; 2. Inner ring body; 3. Blade; 4. Lower template; 4a. T-shaped slide; 4b. Second anti-rotation limit surface; 4c. Mounting countersunk hole; 4d. Second movable block hole; 5. Upper template; 6. Guide block; 7. Slide; 8. Outer peripheral surface forming block; 8a. Forming groove; 8b. Wedge surface; 8c. T-shaped slider; 8d. Anti-slip limit groove; 9. Fixed core block; 9a. Main body; 9b. Forming body; 9c. First movable block hole; 9d. V-shaped groove; 9e. Positioning hole; 9f. First anti-rotation limit surface; 10. Loose block rod; 10a. Second docking plane; 10b. Second positioning groove; 11. Conformable loose block; 11a. First spiral surface; 11b. First positioning groove; 11c. First docking plane; 12. Fixed Fixed movable block; 12a, second spiral surface; 12b, first positioning protrusion; 12c, plug-in block; 13, movable block mounting seat; 13a, plug-in countersunk hole; 14, wedge-shaped block; 15, arc-shaped plate; 15a, flat hole; 15b, slot; 16, handle rod; 17, first magnet; 18, second magnet; 19, inner hole forming column; 19a, positioning column; 19b, flange edge; 20, first screw; 21, drive plate; 21a, upper plate body; 21b, lower plate body; 22, cam; 23, push rod; 24, spring; 25, support block; 27, long screw; 28, drive shaft; 29, drive handle; 30, rod seat; 31, second screw; 32, third screw; 33, pressure block; 34, fourth screw; 35, panel. DETAILED DESCRIPTION

[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0022] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0023] In addition, the descriptions of "first", "second", etc. in the present invention are for descriptive purposes only and should not be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0024] Combine Figures 3 to 15 As shown, a molding die for a vortex finder wax pattern comprises a lower template 4, an upper template 5, a movable block mounting seat 13 and an ejection mechanism.

[0025] The movable block mounting seat 13 is movably inserted into the central through hole of the upper template 5; specifically, the outer diameter of the upper half of the two-step cylindrical surface of the movable block mounting seat 13 is larger than the outer diameter of the lower half, and the outer cylindrical surface of the lower half of the movable block mounting seat 13 slides in conjunction with the central through hole of the upper template 5.

[0026] A fixed core block 9 is mounted in the central countersunk hole on the top surface of the lower mold plate 4. This fixed core block 9 comprises a main body 9a and multiple molded bodies 9b integrally formed on the top surface of the main body 9a. Specifically, the outer circumference of the main body 9a includes multiple first anti-rotation limiter surfaces 9f. Within the central countersunk hole on the top surface of the lower mold plate 4 is a second anti-rotation limiter surface 4b, designed to cooperate with the first anti-rotation limiter surfaces 9f. The main body 9a is embedded in the central countersunk hole on the top surface of the lower mold plate 4 and secured thereto via a second screw 31. The first anti-rotation limiter surfaces 9f abut against the second anti-rotation limiter surfaces 4b, preventing the fixed core block 9 from rotating.

[0027] A plurality of movable block rods 10 are movably inserted on the main body 9a; and a movable block rod 10 is provided between the two forming bodies 9b; each movable block rod 10 is equipped with a follow-type movable block 11 and a fixed movable block 12.

[0028] The top of the fixed movable block 12 is connected to the movable block mounting seat 13. Specifically, a plug-in block 12c is integrally formed on the top of the fixed movable block 12, and a plurality of plug-in countersunk holes 13a are evenly distributed in an annular pattern on the bottom surface of the movable block mounting seat 13. After the plug-in block 12c of the fixed movable block 12 is inserted into the plug-in countersunk holes 13a, the connection is secured using a third screw 32.

[0029] The upper portion of the movable block rod 10 , the forming body 9 b , the follower movable block 11 and the fixed movable block 12 are used together to form the spiral cavity between two adjacent blades 3 on the vortex finder wax mold.

[0030] Combine Figures 10 to 12As shown, a first helical surface 11a is provided on the follower movable block 11, and a second helical surface 12a for cooperating with the first helical surface 11a is provided on the fixed movable block 12; the inclination direction of the first helical surface 11a and the second helical surface 12a is the same as the inclination direction of the spiral cavity between two adjacent blades 3 on the vortex finder wax mold.

[0031] The ejection structure is used to push the movable block rod 10 and the upper template 5 upward.

[0032] Combine Figure 3 、 Figure 4 and Figure 7 As shown, two curved plates 15 are mounted on the top surface of the upper mold plate 5. These two curved plates 15 surround the movable block mounting seat 13. Each curved plate 15 is provided with a flat hole 15a. The flat holes 15a rise in a clockwise spiral. The angle of inclination of the mating surfaces between the fixed movable block 12 and the follower movable block 11 is the same as that of the flat holes 15a. A handle rod 16 is positioned in each flat hole 15a, and the handle rod 16 passes through the flat hole 15a and then screws onto the movable block mounting seat 13.

[0033] Combine Figure 12 As shown, with this structure, when the mold is opened, the handle rod 16 is pushed clockwise (indicated by arrow A in the figure), causing it to rise along the flat hole 15a. This causes the loose-piece mounting base 13 to undergo a combined motion: first, clockwise movement, and second, upward movement. This movement drives the fixed loose piece 12 along, causing the second helical surface 12a of the fixed loose piece 12 to slide relative to the first helical surface 11a of the follower loose piece 11, allowing the fixed loose piece 12 to be removed from the finished vortex finder wax pattern.

[0034] Combine Figure 3 As shown, the flat hole 15a is high on the left side and low on the right side, and a slot 15b is provided at the left end of the flat hole 15a. When the mold is opened, the handle rod 16 rises along the flat hole 15a and falls into the slot 15b after reaching its position, which can prevent the handle rod 16 from sliding along the flat hole 15a by itself.

[0035] Combine Figure 10 and Figure 11As shown, the fixed movable piece 12 and the follower movable piece 11 are made of ferromagnetic material; a first magnet 17 is embedded on the first helical surface 11a of the follower movable piece 11, and a second magnet 18 is embedded on the second helical surface 12a of the fixed movable piece 12. Specifically, the materials of the fixed movable piece 12 and the follower movable piece 11 include, but are not limited to, iron. During mold closing, the first magnet 17 generates suction on the fixed movable piece 12, while the second magnet 18 generates suction on the follower movable piece 11, facilitating the installation of the follower movable piece 11 on the fixed movable piece 12.

[0036] Combine Figures 10 to 14 As shown, a first positioning groove 11b is provided on the first spiral surface 11a of the follower movable block 11; a first positioning protrusion 12b is integrally formed on the second spiral surface 12a of the fixed movable block 12, and the first positioning protrusion 12b is used to slide and plug in with the first positioning groove 11b. When the mold is closed, the first positioning protrusion 12b is inserted into the first positioning groove 11b to play a positioning role. When the mold is opened, since the fixed movable block 12 moves relative to the follower movable block 11, it is necessary to adopt a sliding fit between the first positioning protrusion 12b and the first positioning groove 11b. The first positioning protrusion 12b and the first positioning groove 11b are respectively arranged along the direction of the second spiral surface 12a and the first spiral surface 11a. Furthermore, a first docking surface 11c is provided on the follower block 11; a second positioning protrusion 11d is provided on the first docking surface 11c; a second docking surface 10a is provided on the top of the movable block rod 10, and a second positioning groove 10b is provided on the second docking surface 10a; and a V-shaped groove 9d is provided on the top of the molded body 9b. When the mold is closed, the first docking surface 11c abuts against the second docking surface 10a, the second positioning protrusion 11d is inserted into the second positioning groove 10b, and the lower end of the fixed movable block 12 abuts within the V-shaped groove 9d. By adopting this structure, the positioning accuracy of the follower block 11, the fixed movable block 12, the movable block rod 10, and the molded body 9b can be guaranteed after the mold is closed.

[0037] Combine Figure 6As shown, the mold also includes an inner hole forming column 19; a positioning column 19a is integrally formed on the lower end surface of the inner hole forming column 19; a positioning hole 9e is provided at the center of the fixed core block 9. When the mold is closed, the inner hole forming column 19 is inserted into the center hole of the loose block mounting seat 13 and slides with the center hole of the loose block mounting seat 13. The positioning column 19a is inserted into the positioning hole 9e, and the inner hole surface of the positioning hole 9e is conical, while the outer cylindrical surface of the positioning column 19a is also conical. The outer cylindrical surface of the inner hole forming column 19 is stepped, with the diameter of the lower half smaller than that of the upper half. A flange 19b is provided on the outer cylindrical surface of the top half to facilitate handling by the operator. The lower half of the inner hole forming column 19 slides in the center hole of the loose block mounting seat 13, and the lower end surface of the inner hole forming column 19 abuts against the fixed core block 9. The lower half of the inner hole forming column 19 is used to form the inner hole of the inner ring body 2 of the vortex finder wax mold. The step surface at the middle position of the inner hole forming column 19 abuts against the bottom surface of the central countersunk hole of the loose piece mounting seat 13.

[0038] In addition, two pressure blocks 33 are fastened to the top surface of the upper mold plate 5 by screws. During the wax injection operation in the wax injection machine, the pressure plate of the wax injection machine directly presses on the pressure blocks 33. In this embodiment, when the mold is closed, the top surface of the inner hole forming column 19 is flush with the pressure blocks 33 and the top surface of the curved plate 15. During the wax injection operation, the pressure plate of the wax injection machine also presses on the top surface of the inner hole forming column 19 and the curved plate 15.

[0039] Combine Figure 7 As shown, two guide blocks 6 are fixedly installed on the top surface of the lower template 4 by screws, and the two guide blocks 6 are spaced apart to form a slide 7; two peripheral surface forming blocks 8 are slidably installed in the slide 7, and each peripheral surface forming block 8 is provided with a semicircular forming groove 8a, and a wedge-shaped surface 8b is provided on the peripheral surface forming block 8; two wedge-shaped blocks 14 are installed on the lower surface of the upper template 5; when the mold is closed, the two wedge-shaped blocks 14 respectively cooperate with the wedge-shaped surfaces 8b of the two peripheral surface forming blocks 8 to push the two peripheral surface forming blocks 8 closer to each other, so that the two forming grooves 8a are spliced ​​into a full circle shape. The forming groove 8a is used to form the outer peripheral surface of the outer ring body 1 of the vortex flow generator wax mold. In addition, in order to ensure the stability of the entire molding mold after the mold is closed, two fourth screws 34 are used to fasten the upper template 5 and the guide blocks 6 after the mold is closed. When the mold needs to be opened after the wax pressing is completed, the fourth screws 34 are removed and the mold opening operation can be carried out.

[0040] Specifically, two long-shaped mounting countersunk holes 4c are provided on the lower template 4, and an inserting boss (not shown in the figure) is provided on the lower end surface of the guide block 6. After the inserting boss is inserted into the mounting countersunk hole 4c, the guide block 6 and the lower template 4 are fastened together by screws.

[0041] In addition, prying openings 6a are provided at two corner positions of the top surface of the guide block 6. If it is difficult to open the mold, the upper mold plate 5 can be pried up at the prying openings 6a using tools.

[0042] Combine Figure 6 、 7 and Figure 15 As shown, a T-shaped groove 4a is provided on the lower template 4; a T-shaped slider 8c is integrally formed on the bottom surface of the outer peripheral surface forming block 8; the T-shaped slider 8c slides in conjunction with the T-shaped groove 4a; an anti-slip limit groove 8d is provided on the bottom surface of the T-shaped slider 8c; a first screw 20 is screwed onto the lower template 4, and the upper end of the first screw 20 extends into the anti-slip limit groove 8d. The inner end of the anti-slip limit groove 8d is sealed, and the outer end is open. When the mold is opened, the outer peripheral surface forming block 8 is pulled outward, and the inner end of the anti-slip limit groove 8d can abut against the first screw 20, preventing the outer peripheral surface forming block 8 from falling off the lower template 4.

[0043] Combine Figure 6 、 Figure 7 As shown, the ejection structure includes a cam 22, a drive plate 21, a push rod 23 and a rod seat 30; two support blocks 25 are installed on the bottom surface of the lower template 4, and a bottom plate 26 is commonly provided on the bottom surface of the two support blocks 25; and a long screw 27 is inserted into the bottom plate 26, and the long screw 27 passes through the bottom plate 26 and the support block 25 from bottom to top and is tightened on the lower template 4; the drive plate 21 is set at a lower position of the lower template 4; the lower ends of the push rod 23 and the rod seat 30 are fixed on the drive plate 21, and the upper end of the push rod 23 is sequentially The drive shaft 28 is rotatably mounted between the two support blocks 25 and passes through the lower template 4 and the guide block 6. The cam 22 is securely mounted in the middle of the drive shaft 28, and the driving arc surface of the cam 22 contacts the bottom surface of the drive plate 21. One end of the drive shaft 28 extends from the support block 25 and is mounted with a drive handle 29. Support platforms 25a are provided on the opposing inner walls of the two support blocks 25. A spring 24 is sleeved on the push rod 23, with the upper end of the spring 24 resting on the lower template 4 and the lower end resting on the drive plate 21. The lower end of the movable block rod 10 passes through the body 9a and the lower template 4 and is connected to the rod seat 30. A panel 35 is provided between the two support blocks 25.

[0044] Combine Figure 13 and Figure 15As shown, a plurality of first movable block holes 9c are evenly distributed in a ring on the main body 9a, and a first movable block hole 9c is provided between two adjacent formed bodies 9b; a plurality of second movable block holes 4d are evenly distributed in a ring on the bottom wall of the central countersunk hole on the top surface of the lower template 4, and the positions of the first movable block holes 9c and the second movable block holes 4d correspond to each other up and down, and the movable block rod 10 passes through the first movable block hole 9c and the second movable block hole 4d in turn and is inserted into the countersunk hole on the top of the rod seat 30, and is screwed onto the movable block rod 10 after passing through the rod seat 30 from bottom to top, so that the two are fixedly connected.

[0045] Combine Figure 6 As shown, the drive plate 21 includes an upper plate body 21a and a lower plate body 21b. A mounting hole is set on the upper plate body 21a for cooperating with the mounting heads of the top rod 23 and the rod seat 30. The lower plate body 21b is connected to the upper plate body 21a by screws and presses the mounting heads of the top rod 23 and the rod seat 30.

[0046] When the ejection operation is not performed, the driving plate 21 rests on the support platform 25 a , and the top end of the ejector rod 23 is flush with the top surface of the guide block 6 .

[0047] On the other hand, this embodiment also provides a method for molding a vortex finder wax pattern, using the above-mentioned molding mold, comprising the following steps: S1. Place the mold after mold closing on the workbench of wax injection molding machine; S2, the wax material in the wax injection machine is injected into the cavity of the forming mold through the wax injection gun; S3. After cooling, the mold is opened. When opening the mold, the movable block mounting seat 13 is first rotated to make the second helical surface 12a of the fixed movable block 12 slide relative to the first helical surface 11a of the follower movable block 11, so that the fixed movable block 12 is pulled out of the vortex finder wax pattern; S4, using the ejection structure to push the movable piece rod 10 and the upper template 5 upward, the movable piece 11 is ejected along with the vortex generator wax pattern and remains in the vortex generator wax pattern; S5. Separate the follow-up pieces 11 from the vortex generator wax pattern one by one to obtain a complete vortex generator wax pattern.

[0048] Combine Figure 3 and 12As shown, the specific operation of step S3 is as follows: pushing the handle rod 16 in a clockwise direction (in the direction indicated by arrow A in the figure), causing the handle rod 16 to rise along the flat hole 15a. At this time, the loose piece mounting seat 13 performs a combined motion: first, clockwise movement, and second, upward movement. This can drive the fixed loose piece 12 to move together, causing the second helical surface 12a of the fixed loose piece 12 to slide relative to the first helical surface 11a of the follower loose piece 11 (in the direction indicated by arrow B in the figure), thereby allowing the fixed loose piece 12 to be extracted from the formed vortex finder wax pattern. After rising along the flat hole 15a and reaching its designated position, the handle rod 16 falls into the retaining groove 15b, preventing the handle rod 16 from sliding along the flat hole 15a on its own.

[0049] In step S4, before using the ejection mechanism to perform the ejection operation, the fourth screw 34 must first be removed. The ejection operation is performed as follows: The drive handle 29 is pushed, and the drive shaft 28 rotates accordingly, causing the cam 22 to push the drive plate 21 upward. The ejector rod 23 simultaneously moves upward, lifting the upper mold plate 5. Simultaneously, the movable rod 10 moves upward, ejecting the injected vortex flow mold. The vortex flow mold is now removed.

[0050] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformation made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. A molding die for a vortex finder wax pattern, characterized in that: It includes a lower template (4), an upper template (5), a movable block mounting seat (13) and an ejection mechanism; The movable block mounting seat (13) is movably inserted into the central through hole of the upper template (5); A fixed core block (9) is installed at the central countersunk hole on the top surface of the lower template (4); the fixed core block (9) comprises a main body (9a) and a plurality of molded bodies (9b) integrally molded on the top surface of the main body (9a); A plurality of movable block rods (10) are movably inserted on the main body (9a); and a movable block rod (10) is provided between the two formed bodies (9b); each movable block rod (10) is equipped with a form-fitting movable block (11) and a fixed movable block (12); the top of the fixed movable block (12) is connected to the movable block mounting seat (13); The upper portion of the movable block rod (10), the forming body (9b), the follow-type movable block (11), and the fixed movable block (12) are used together to form a spiral cavity between two adjacent blades (3) on the vortex finder wax mold; A first helical surface (11a) is provided on the movable follower block (11), and a second helical surface (12a) for cooperating with the first helical surface (11a) is provided on the fixed movable block (12); The inclination direction of the first helical surface (11a) and the second helical surface (12a) is the same as the inclination direction of the helical cavity between two adjacent blades (3) on the vortex finder wax mold; The ejection structure is used to push the movable block rod (10) and the upper template (5) upwards.

2. The molding die according to claim 1, wherein: Two arc-shaped plates (15) are installed on the top surface of the upper template (5); the two arc-shaped plates (15) surround the movable block mounting seat (13); A flat hole (15a) is provided on each arc-shaped plate (15), and the flat hole (15a) is in a spiral ascending shape; the inclination angle of the matching surface between the fixed movable block (12) and the follower movable block (11) is the same as the inclination angle of the flat hole (15a); A handle rod is provided at each flat hole (15a), and the handle rod (16) passes through the flat hole (15a) and is screwed onto the movable block mounting seat (13).

3. The molding die according to claim 1, wherein: The fixed movable block (12) and the flexible movable block (11) are made of ferromagnetic material; A first magnet (17) is embedded on the first spiral surface (11a) of the movable block (11); A second magnet (18) is embedded on the second spiral surface (12a) of the fixed movable block (12).

4. The molding die according to claim 1, wherein: A first positioning groove (11b) is provided on the first spiral surface (11a) of the movable block (11); A first positioning protrusion (12b) is integrally formed on the second spiral surface (12a) of the fixed movable block (12), and the first positioning protrusion (12b) is used for sliding and plugging cooperation with the first positioning groove (11b).

5. The molding die according to claim 1, wherein: A first docking plane (11c) is provided on the movable block (11); a second positioning protrusion (11d) is provided on the first docking plane (11c); A second docking plane (10a) is provided on the top of the movable block rod (10), and a second positioning groove (10b) is provided on the second docking plane (10a); A V-shaped groove (9d) is provided on the top of the molded body (9b); When the mold is closed, the first docking plane (11c) abuts against the second docking plane (10a), the second positioning protrusion (11d) is inserted into the second positioning groove (10b), and the lower end of the fixed movable block (12) abuts against the V-shaped groove (9d).

6. The molding die according to claim 1, wherein: It also includes an inner hole forming column (19); the lower end surface of the inner hole forming column (19) is integrally formed with a positioning column (19a); A positioning hole (9e) is provided at the center of the fixed core block (9); When the mold is closed, the inner hole forming column (19) is inserted into the center hole of the movable block mounting seat (13), and the inner hole forming column (19) and the center hole of the movable block mounting seat (13) are slidably matched; the positioning column (19a) is inserted into the positioning hole (9e), and the inner hole surface of the positioning hole (9e) is a conical surface, and the outer cylindrical surface of the positioning column (19a) is a conical surface.

7. The molding die according to claim 1, wherein: Two guide blocks (6) are fixedly mounted on the top surface of the lower template (4), and the two guide blocks (6) are spaced apart to form a slide groove (7); Two peripheral surface forming blocks (8) are slidably mounted in the slide groove (7), and a semicircular forming groove (8a) is provided on each peripheral surface forming block (8); A wedge-shaped surface (8b) is provided on the outer peripheral surface forming block (8); Two wedge-shaped blocks (14) are installed on the lower surface of the upper template (5); When the mold is closed, the two wedge blocks (14) respectively cooperate with the wedge surfaces (8b) of the two peripheral surface forming blocks (8) to push the two peripheral surface forming blocks (8) closer to each other, so that the two forming grooves (8a) are spliced ​​into a full circle shape.

8. The molding die according to claim 7, wherein: A T-shaped slide groove (4a) is provided on the lower template (4); a T-shaped slider (8c) is integrally formed on the bottom surface of the outer peripheral surface forming block (8); the T-shaped slider (8c) is slidably engaged with the T-shaped slide groove (4a); An anti-slip limit groove (8d) is provided on the bottom surface of the T-shaped slider (8c); A first screw (20) is screwed onto the lower template (4), and the upper end of the first screw (20) extends into the anti-slip limit groove (8d).

9. The molding die according to claim 7, wherein: The ejection structure comprises a cam (22), a drive plate (21), an ejector rod (23) and a rod seat (30); Two support blocks (25) are installed on the bottom surface of the lower template (4), and a bottom plate (26) is provided on the bottom surfaces of the two support blocks (25); a long screw (27) is inserted into the bottom plate (26), and the long screw (27) passes through the bottom plate (26) and the support blocks (25) from bottom to top and is then screwed onto the lower template (4); The driving plate (21) is arranged below the lower template (4); The lower ends of the push rod (23) and the rod seat (30) are fixed on the driving plate (21), and the upper end of the push rod (23) passes through the lower template (4) and the guide block (6) in sequence; A drive shaft (28) is rotatably mounted between the two support blocks (25); the cam (22) is fixedly mounted on the middle portion of the drive shaft (28), and the drive arc surface of the cam (22) contacts the bottom surface of the drive plate (21); One end of the drive shaft (28) extends from the support block (25) and is equipped with a drive handle (29); Support platforms (25a) are provided on the inner wall surfaces facing each other of the two support blocks (25); A spring (24) is sleeved on the push rod (23), and the upper end of the spring (24) abuts against the lower template (4), and the lower end abuts against the drive plate (21); The lower end of the movable block rod (10) passes through the body (9a) and the lower template (4) and is connected to the rod seat (30); When the ejection operation is not performed, the driving plate (21) rests on the support platform (25a), and the top end of the ejector rod (23) is flush with the top surface of the guide block (6).

10. A method for molding a vortex finder wax pattern, characterized in that: The forming die according to any one of claims 1 to 9 comprises the following steps: S1. Place the mold after mold closing on the workbench of wax injection molding machine; S2, the wax material in the wax injection machine is injected into the cavity of the forming mold through the wax injection gun; S3, after cooling, the mold is opened. When opening the mold, the movable block mounting seat (13) is first rotated to make the second spiral surface (12a) of the fixed movable block (12) and the first spiral surface (11a) of the follow-type movable block (11) slide relative to each other, so that the fixed movable block (12) is pulled out from the vortex generator wax mold; S4, using the ejection structure to push the movable block rod (10) and the upper template (5) upward, and the mold movable block (11) is ejected together with the vortex generator wax mold and remains in the vortex generator wax mold; S5. Separate the follow-up pieces (11) from the vortex generator wax mold one by one to obtain a complete vortex generator wax mold.

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