Gypsum core mold supporting tool

Abstract

The utility model discloses a gypsum core mold supporting tool, and relates to the technical field of composite material production. The device is characterized by comprising a first aluminum pipe, the upper end of the first aluminum pipe is connected with a lifting unit, and the upper end of the lifting unit is connected with a second aluminum pipe; an arc-shaped supporting plate is mounted at the upper end of the second aluminum pipe; a plurality of supporting units are installed in the circumferential direction of the first aluminum pipe, a third aluminum pipe is movably inserted into a lower end opening of the first aluminum pipe, and the third aluminum pipe can control the opening and closing angles of the supporting units when moving in the first aluminum pipe in the vertical direction. A limiting unit used for limiting the position of the third aluminum pipe is arranged on one side of the first aluminum pipe. The supporting tool can replace manual work to support the top round pipe in the process of disassembling the steel mold in the gypsum core mold, the operation efficiency can be effectively improved, and the safety risk in the operation process can be reduced.

Description

Technical Field

[0001] This application relates to the field of composite material production technology, and in particular to a gypsum core mold support fixture. Background Technology

[0002] With the development of industrialization, the solid rocket motor casing in the aerospace field has evolved from traditional steel casings to high-end composite wound casings. Composite material casings have a series of advantages such as light weight, high strength, and high production volume. Currently, composite material casings are produced using carbon fiber winding. However, the wound casing requires a mandrel for internal support (the mandrel is removed after winding and curing). Commonly used mandrel materials are divided into two categories: molten and solvent-based materials (such as paraffin wax, low-melting-point metals, etc.) and assembly-type materials (commonly used materials include aluminum, steel, wood, and plaster). Among assembly-type materials, plaster mandrels have advantages over pure metal mandrels in terms of low price, simple molding process, and ease of forming various complex shapes. Therefore, plaster mandrels remain a primary type of mold used in the manufacture of rocket motor casings.

[0003] Commonly used plaster core molds typically have a diameter of 1.2–2.4 m, a length of 8–10 m, and a weight of 8–10 t. They are often made using a segmented steel mold, also known as the core mold skeleton, with a general structure as follows: Figure 1 and Figure 2 As shown, it mainly includes a mandrel, a steel support plate, and a round tube located outside the support plate. In the specific process of making a plaster core mold, plaster cement slurry is generally applied to the surface of the core mold frame. As the core mold frame rotates, the slurry is applied until the entire surface of the core mold is covered, forming a plaster layer, thus obtaining the plaster core mold. When dismantling a plaster core mold, manual disassembly is commonly used. The disassembly sequence for the steel mold in a plaster core mold is generally as follows: first remove the mandrel, then the steel support plate, and finally the round tube.

[0004] During the dismantling of the round pipe, to prevent it from injuring others, one or two people are often needed to support the top of the pipe with their bodies and hands, while two other workers are specifically responsible for dismantling it. This method is not only inefficient but also poses safety risks. Utility Model Content

[0005] This application provides a gypsum core mold support fixture, which can replace manual support for part of the round tube during the disassembly of the steel mold in the gypsum core mold, effectively solving some problems that may exist when manually supporting the round tube.

[0006] The above-mentioned objective of this application is achieved through the following technical solution:

[0007] A plaster core mold support fixture includes a first aluminum tube, the upper end of which is connected to a lifting unit that can freely adjust its height, and the upper end of the lifting unit is connected to a second aluminum tube.

[0008] An arc-shaped support plate is installed at the upper end of the second aluminum tube;

[0009] The first aluminum tube is circumferentially equipped with multiple support units, and a third aluminum tube is movably inserted into the lower end of the first aluminum tube. The multiple support units circumferentially of the first aluminum tube are all connected to the third aluminum tube. When the third aluminum tube moves vertically inside the first aluminum tube, the opening and closing angles of the multiple support units can be controlled.

[0010] One side of the first aluminum tube is provided with a limiting unit for restricting the position of the third aluminum tube.

[0011] Furthermore, the lifting unit is a screw jack, which has the function of preventing the screw from rotating around its own axis during use. The upper end of the screw of the screw jack is connected to the lower end of the second aluminum tube through a flange.

[0012] Furthermore, an upper base plate is fixedly connected to the upper end of the second aluminum tube, an ear seat is welded on the upper base plate, and a stiffening plate is welded to the lower side of the middle position of the arc-shaped support plate. After the arc-shaped support plate is mounted on the ear seat through the stiffening plate, the arc-shaped support plate and the stiffening plate can be fixed together by bolts and nuts.

[0013] Furthermore, a stop bar is welded to the upper side of both ends of the arc-shaped support plate along its length.

[0014] Furthermore, the support unit includes a first mounting base, which is welded and fixed to the outer wall of the first aluminum tube, and a support leg is hinged to the lower side of the first mounting base.

[0015] Furthermore, a second mounting seat is welded to the periphery of the third aluminum tube at the position corresponding to the leg in each of the support units, and a third mounting seat is welded to the side of each leg in each support unit facing the third aluminum tube. A fourth aluminum tube is hinged between the second mounting seat and the third mounting seat on each side of the third aluminum tube.

[0016] Furthermore, the limiting unit includes a fourth mounting base, which is welded to one side wall of the first aluminum tube. A pin is inserted through the third mounting base, and a through hole is provided on the third aluminum tube at a position corresponding to the pin. The pin can move freely in the third aluminum tube and the third mounting base along its axial direction.

[0017] The third aluminum tube has multiple limiting holes along its height direction, and the diameter of the limiting holes is not less than the diameter of the pin.

[0018] Furthermore, an L-shaped reinforcing block is provided above the fourth mounting base. One side of the reinforcing block is welded to the first aluminum tube, and the other side of the reinforcing block is welded to the upper side of the fourth mounting base.

[0019] In summary, this application includes at least one of the following beneficial technical effects:

[0020] The support fixture of this application, through mechanized support and limiting design, can maintain the state of some circular pipes instead of workers, preventing these pipes from accidentally falling and injuring workers. Compared with manual operation, it not only provides more stable support and effectively reduces the safety risks for operators during disassembly, but also avoids the potential risks of accidents during manual pipe support. Furthermore, since this application uses mechanized support instead of manual support, it effectively reduces the labor intensity of relevant workers. The fixture of this application can quickly achieve a long-term stable support effect for some circular pipes, which helps to accelerate the disassembly speed, shorten the production cycle, and improve overall work efficiency. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is the front view of an existing plaster core mold made of steel.

[0023] Figure 2 This is a side view of an existing plaster core mold made of steel.

[0024] Figure 3 This is a schematic diagram of the overall structure of this application in use;

[0025] Figure 4 yes Figure 3 Side view of the central support fixture;

[0026] Figure 5 This is a three-dimensional structural diagram showing the structure after removing the upper part of the first aluminum tube and the third aluminum tube inserted at its lower end.

[0027] Figure 6 This is a schematic diagram of the structure of the upper limit unit of the first aluminum tube in this application;

[0028] Figure 7 This is a schematic diagram of the structure of the second aluminum tube in this application;

[0029] Figure 8 This is a schematic diagram of the arc-shaped support plate of this application;

[0030] Figure 9 From Figure 8 A schematic diagram of the structure when observed from below the medium-circular arc-shaped support plate.

[0031] Reference numerals in the attached drawings: 1. First aluminum tube; 2. Lifting unit; 3. Second aluminum tube; 4. Arc-shaped support plate; 5. Support unit; 51. First mounting seat; 52. Support leg; 6. Third aluminum tube; 7. Limiting unit; 71. Fourth mounting seat; 72. Pin; 8. Flange; 9. Upper base plate; 10. Ear seat; 11. Rib plate; 12. Stop bar; 13. Second mounting seat; 14. Third mounting seat; 15. Fourth aluminum tube; 16. Reinforcing block; 17. Mandrel; 18. Steel support plate; 19. Round tube. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions in the embodiments of this application are described clearly and completely below. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are also within the scope of protection of this application.

[0033] like Figure 3 and Figure 4 As shown, this application discloses a plaster core mold support fixture, including a first aluminum tube 1. The upper end of the first aluminum tube 1 is connected to a lifting unit 2 that can freely adjust its height, and the upper end of the lifting unit 2 is connected to a second aluminum tube 3. An arc-shaped support plate 4 is installed on the upper end of the second aluminum tube 3. Multiple support units 5 are installed circumferentially on the first aluminum tube 1, and a third aluminum tube 6 is movably inserted into the lower end of the first aluminum tube 1. The multiple support units 5 circumferentially on the first aluminum tube 1 are all connected to the third aluminum tube 6. When the third aluminum tube 6 moves vertically inside the first aluminum tube 1, the opening and closing angles of the multiple support units 5 can be controlled. A limiting unit 7 for restricting the position of the third aluminum tube 6 is provided on one side of the first aluminum tube 1.

[0034] In the above embodiments, the first aluminum tube 1 of this application is preferably a 50×50mm square tube, and the second aluminum tube 3 is preferably a 40×40mm square tube. The upper end of the first aluminum tube 1 is connected to the second aluminum tube 3 through the lifting unit 2. The lower end of the first aluminum tube 1 is circumferentially equipped with multiple support units 5, and the multiple support units 5 can be controlled by the third aluminum tube 6 movably inserted inside the first aluminum tube 1.

[0035] When workers disassemble the mandrel 17 and steel support plate 18 in the plaster core mold, and need to remove the round tube 19, they can first adjust the position of the third aluminum tube 6 inside the first aluminum tube 1 to unfold multiple support units 5. After unfolding the multiple support units 5, the position of the third aluminum tube 6 is locked by the limiting unit 7. At this time, the support fixture of this application can stably support the inside of the hole after the steel support plate 18 is removed from the steel mold using multiple support units 5. Next, the worker can drive the second aluminum tube 3 upward by adjusting the lifting unit 2 until the arc-shaped support plate 4 at the upper end of the second aluminum tube 3 contacts the lower side of the round tube 19 in the top area. In this way, the support fixture of this application can replace the worker to support this part of the round tube 19. Compared with the traditional method of workers supporting the round tube 19, this application not only has a more stable support effect and can effectively reduce the safety risks of operators during the disassembly process, but also avoids the accidental risks that may occur during the manual support of the round tube 19. In addition, since this application uses mechanized support instead of manual support, it can effectively reduce the labor intensity of relevant workers. The tooling of this application can quickly achieve long-term stable support for a portion of the round tube 19, which helps to speed up the disassembly of the round tube 19, shorten the production cycle, and improve overall work efficiency.

[0036] Furthermore, such as Figure 3 and Figure 4 As shown, the lifting unit 2 is a screw jack. The screw jack has the function of preventing the screw from rotating around its own axis during use. The upper end of the screw of the screw jack is connected to the lower end of the second aluminum tube 3 through the flange 8.

[0037] In the above embodiments, the screw jack with anti-rotation mechanism is existing technology, and its principle will not be elaborated here. In this application, the lower end of the outer protective cylinder of the screw jack is fixedly connected to the upper end of the first aluminum tube 1. The upper end of the screw responsible for lifting in the screw jack is connected to the lower end of the second aluminum tube 3 via a flange 8. Thus, when adjusting the height of the arc-shaped support plate 4, the worker only needs to control the extension height of the screw in the screw jack. In actual use, if the wiring of the screw jack is inconvenient, or if there are concerns about the safety of workers due to electrical issues, a manual screw jack is preferable. Since this application uses a screw jack to achieve the lifting operation of the arc-shaped support plate 4, compared with existing technologies, it can greatly reduce the labor intensity of operators, reduce the reliance on manual labor in the disassembly process, and correspondingly improve the comfort of workers during operation.

[0038] Furthermore, such as Figures 7-9As shown, the upper end of the second aluminum tube 3 is fixedly connected to the upper base plate 9, and the upper base plate 9 is welded with the ear seat 10. The lower side of the middle position of the arc-shaped support plate 4 is welded with the stiffening plate 11. After the arc-shaped support plate 4 is supported on the ear seat 10 by the stiffening plate 11, the arc-shaped support plate 4 and the stiffening plate 11 can be fixed together by bolts and nuts.

[0039] In the above embodiments, an upper base plate 9 is welded to the upper end of the second aluminum tube 3, and an ear seat 10 is welded above the upper base plate 9. A stiffening plate 11 is welded to the lower side of the arc-shaped support plate 4. During normal use, the stiffening plate 11 can be fitted onto the outside of the ear seat 10 and then fixed together with bolts and nuts. This allows the arc-shaped support plate 4 and the second aluminum tube 3 to form a stable whole, providing stable support from the second aluminum tube 3 during use. Since the ear seat 10 and the stiffening plate 11 are connected by bolts and nuts, after use, workers can remove these bolts and nuts, allowing the arc-shaped support plate 4 to be removed from the second aluminum tube 3 for subsequent storage.

[0040] Furthermore, such as Figure 3 and Figure 8 As shown, a stop bar 12 is welded to the upper side of both ends of the arc-shaped support plate 4 along its length.

[0041] In the above embodiments, the stop bar 12, which is set on the arc-shaped support plate 4 in the manner described above, can prevent the round tube 19 from accidentally slipping off the arc-shaped support plate 4 during disassembly, thereby blocking and limiting it and enhancing the safety of the operation.

[0042] Furthermore, such as Figures 3-5 As shown, the support unit 5 includes a first mounting base 51, which is welded to the outer wall of the first aluminum tube 1, and a support leg 52 is hinged to the lower side of the first mounting base 51.

[0043] In the above embodiments, the first aluminum tube 1 of this application is preferably a square tube, and the square tube has four circumferential surfaces. Therefore, the number of support units 5 provided on the circumference of the square tube is four, and the four support units 5 are respectively provided on the four surfaces of the first aluminum tube 1. Each support unit 5 includes a first mounting base 51 and a support leg 52, and the support leg 52 is hinged to the first mounting base 51. By adjusting the swing angle of the support leg 52, its expansion or contraction can be controlled. Since the support fixture of this application is mainly used in holes with a circular cross-section, the two support legs 52 on one opposite side of the first aluminum tube 1 are supported at the lowest point of the inner wall of the hole during use, and the two support legs 52 on the other opposite side are located on both sides of the lowest point of the inner wall of the hole. Therefore, in the design, the length of the two support legs 52 supported at the lowest point of the hole can be designed to be slightly larger than the other two support legs 52, so as to ensure that the overall support effect of the equipment is more stable during use.

[0044] Furthermore, such as Figures 3-5 As shown, a second mounting seat 13 is welded to the periphery of the third aluminum tube 6 at the position corresponding to the support leg 52 in each support unit 5. A third mounting seat 14 is welded to the side of the support leg 52 in each support unit 5 facing the third aluminum tube 6. A fourth aluminum tube 15 is hinged between the second mounting seat 13 and the third mounting seat 14 on each side of the third aluminum tube 6.

[0045] In the above embodiments, a third mounting base 14 is welded to the inner side of each of the four legs 52 on the periphery of the first aluminum tube 1 (i.e., the side of the legs 52 facing the third aluminum tube 6). Each third mounting base 14 is hinged to one end of a fourth aluminum tube 15, and the other ends of the four fourth aluminum tubes 15 are respectively hinged to the third mounting bases 14 welded to the four sides of the third aluminum tube 6. In this way, when the third aluminum tube 6 moves up and down along the first aluminum tube 1, the four legs 52 can be simultaneously extended or retracted through the fourth aluminum tubes 15. Since the extension angle of the four legs 52 can be adjusted through the third aluminum tubes 6, the installation and disassembly efficiency of the support fixture of this application can be improved.

[0046] Furthermore, such as Figures 3-6 As shown, the limiting unit 7 includes a fourth mounting base 71, which is welded to one side wall of the first aluminum tube 1. A pin 72 is inserted through the third mounting base 14, and a through hole is provided on the third aluminum tube 6 at the position corresponding to the pin 72. The pin 72 can move freely in the third aluminum tube 6 and the third mounting base 14 along its axial direction.

[0047] The third aluminum tube 6 has multiple limiting holes along its height direction, and the diameter of the limiting holes is not less than the diameter of the pin 72.

[0048] In the above embodiments, the third aluminum tube 6 of this application is provided with multiple limiting holes, and a pin 72 is movably inserted into the fourth mounting base 71 on the outside of the first aluminum tube 1. The pin 72 is preferably a spring pin 72, which makes it more convenient to use. A through hole is provided on the third aluminum tube 6 at the position corresponding to the pin 72, so that the pin 72 can freely pass into or out of the third aluminum tube 6 along its own axis during use. Based on this, when the worker adjusts the third aluminum tube 6 to align any of its limiting holes with the pin 72, the third aluminum tube 6 can be fixed in the first aluminum tube 1 by inserting the pin 72 into the limiting hole, ensuring the stability and safety of the support fixture during use.

[0049] Furthermore, such as Figure 3 and Figure 6As shown, a reinforcing block 16 with an L-shaped cross-section is provided above the fourth mounting base 71. One side of the reinforcing block 16 is welded to the first aluminum tube 1, and the other side of the reinforcing block 16 is welded to the upper side of the fourth mounting base 71.

[0050] In the above embodiments, the reinforcing block 16 provided on the fourth mounting base 71 can improve the stability of the fourth mounting base 71 during use.

[0051] The implementation principle of this embodiment is as follows: In use, first adjust the position of the pin 72 to ensure it does not restrict the position of the third aluminum tube 6 inside the first aluminum tube 1. Then, the worker moves the third aluminum tube 6, causing it to simultaneously unfold around the first aluminum tube 1 along with multiple support legs 52. Once the unfolding angle meets the requirements, the pin 72 is reinserted into the first aluminum tube 1, passing through the limiting hole on the third aluminum tube 6, thereby achieving the limiting and fixing of the positions of the multiple support legs 52. Next, the worker can install the arc-shaped support plate 4 above the second aluminum tube 3 using bolts and nuts. Finally, the screw jack is started, using the screw to drive the second aluminum tube 3, along with the arc-shaped support plate 4, to fit against the top circular tube 19, thus forming a stable support for this part of the circular tube 19. Based on the above conditions, after the workers have disassembled the round tubes 19 on both sides, the screw jack can be restarted. The arc-shaped support plate 4 will lower the top round tube 19 along with it. During this process, the stop bars 12 welded to both sides of the arc-shaped support plate 4 will limit the movement of this part of the round tube 19, preventing it from slipping off the arc-shaped support plate 4. After the arc-shaped support plate 4 has lowered down with the top round tube 19, the workers can remove this part of the round tube 19. At this point, the arc-shaped support plate 4 can be removed, and the multiple outriggers 52 can be retracted using the third aluminum tube 6. The entire support fixture of this application can then be transferred to a designated area for storage.

[0052] Compared to the traditional method of manually supporting the top circular tube 19, the support fixture of this application has at least the following advantages: Mechanized support and limiting design reduce the safety risks for operators during disassembly, avoiding accidental injuries caused by manual support; the use of a screw jack for lifting operations is not only convenient but also reduces the labor intensity of operators, lowers the reliance on manual labor in the core mold disassembly process, and improves the comfort of the operation; the fixture can quickly support the top circular tube 19 and then quickly lower it using the screw jack, effectively accelerating the disassembly speed, shortening the production cycle, and improving overall work efficiency; in actual production, the fixture is also applicable to circular tubes 19 of various diameters and lengths, demonstrating good adaptability and meeting different production needs; the fixture has a simple structure, is easy to install and disassemble, and reduces the skill requirements for operators, lowering training costs.

[0053] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A plaster core mold support fixture, characterized in that: It includes a first aluminum tube (1), the upper end of which is connected to a lifting unit (2) that can freely adjust its own height, and the upper end of the lifting unit (2) is connected to a second aluminum tube (3). The upper end of the second aluminum tube (3) is equipped with an arc-shaped support plate (4); The first aluminum tube (1) is circumferentially equipped with multiple support units (5), and a third aluminum tube (6) is movably inserted into the lower end of the first aluminum tube (1). The multiple support units (5) circumferentially of the first aluminum tube (1) are all connected to the third aluminum tube (6). When the third aluminum tube (6) moves vertically inside the first aluminum tube (1), it can control the opening and closing angle of the multiple support units (5). One side of the first aluminum tube (1) is provided with a limiting unit (7) for restricting the position of the third aluminum tube (6).

2. The plaster core mold support fixture according to claim 1, characterized in that: The lifting unit (2) is a screw jack, which has the function of preventing the screw from rotating around its own axis during use. The upper end of the screw of the screw jack is connected to the lower end of the second aluminum tube (3) through a flange (8).

3. The plaster core mold support fixture according to claim 2, characterized in that: The upper end of the second aluminum tube (3) is fixedly connected to an upper base plate (9). An ear seat (10) is welded on the upper base plate (9). A stiffening plate (11) is welded on the lower side of the middle position of the arc-shaped support plate (4). After the arc-shaped support plate (4) is mounted on the ear seat (10) through the stiffening plate (11), the arc-shaped support plate (4) and the stiffening plate (11) can be fixed together by bolts and nuts.

4. The plaster core mold support fixture according to claim 1, characterized in that: A stop bar (12) is welded to the upper side of both ends of the arc-shaped support plate (4) along its length.

5. The plaster core mold support fixture according to any one of claims 1 to 4, characterized in that: The support unit (5) includes a first mounting base (51), which is welded to the outer wall of the first aluminum tube (1), and a support leg (52) is hinged to the lower side of the first mounting base (51).

6. The plaster core mold support fixture according to claim 5, characterized in that: A second mounting seat (13) is welded to the periphery of the third aluminum tube (6) at the position corresponding to the support leg (52) in each support unit (5). A third mounting seat (14) is welded to the side of the support leg (52) in each support unit (5) facing the third aluminum tube (6). A fourth aluminum tube (15) is hinged between the second mounting seat (13) and the third mounting seat (14) on each side of the third aluminum tube (6).

7. The plaster core mold support fixture according to claim 6, characterized in that: The limiting unit (7) includes a fourth mounting base (71), which is welded to one side wall of the first aluminum tube (1). A pin (72) is inserted through the third mounting base (14), and a through hole is provided on the third aluminum tube (6) at the position corresponding to the pin (72). The pin (72) can move freely in the third aluminum tube (6) and the third mounting base (14) along its axial direction. The third aluminum tube (6) has multiple limiting holes along its height direction, and the diameter of the limiting holes is not less than the diameter of the pin (72).

8. The plaster core mold support fixture according to claim 7, characterized in that: The fourth mounting base (71) is provided with a reinforcing block (16) with an L-shaped cross-section above it. One side of the reinforcing block (16) is welded to the first aluminum tube (1), and the other side of the reinforcing block (16) is welded to the upper side of the fourth mounting base (71).

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