A protective plate casting mold and its application method

Abstract

This invention discloses a protective plate casting mold and its usage method, relating to the field of polyurethane casting technology. The mold includes a first cavity plate, a second cavity plate, positioning elements, a first core, a bushing positioning core, a bushing, and a second core. The second cavity plate is disposed within the first cavity plate, and its lower end is bent to form a protrusion. A cavity is formed between the second cavity plate, the protrusion, and the first cavity plate. Several bushing positioning cores and several first cores are respectively installed in the cavity via positioning elements. A second core is movably disposed at the upper end of the protrusion. Through the positioning elements and springs, the first core, the second core, and the bushing can shrink along with the polyurethane material during the curing and shrinkage process, effectively avoiding the problems of hole elongation and bushing loosening. This improves the molding quality of the antenna protective plate and meets the high-precision requirements of high-speed train antenna protective plates.

Description

Technical Field

[0001] This invention relates to the field of polyurethane casting technology, and in particular to a protective plate casting mold and its usage method. Background Technology

[0002] The antenna shielding plate of the high-speed train, cast with polyurethane material, is used to protect the antenna components from impacts such as flying stones, hail, and rain during high-speed train operation, as well as scratches during routine maintenance. The antenna shielding plate has holes and embedded steel bushings for installation and fixation on the high-speed train.

[0003] Because polyurethane material shrinks during the molding process, and the dimensions of polyurethane protective plates, as well as the hole spacing and bushing spacing, are relatively large, the shrinkage can reach 6-10mm. Conventional casting mold structures use cores and positioning pins in fixed positions, which can lead to the holes and bushings not shrinking properly during the curing process of polyurethane material. As a result, the holes are stretched and the bushings loosen, leading to product scrap. Summary of the Invention

[0004] The purpose of this invention is to provide a protective plate casting mold and its usage method to solve the above-mentioned technical problems.

[0005] The technical solution adopted in this invention is as follows: A protective plate casting mold includes a first cavity plate, a second cavity plate, a positioning element, a first core, a bushing positioning core, a bushing, and a second core. The second cavity plate is disposed inside the first cavity plate. The lower end of the second cavity plate is bent to form a protrusion. A cavity is formed between the second cavity plate, the protrusion, and the first cavity plate. A plurality of bushing positioning cores and a plurality of first cores are respectively installed in the cavity through the positioning element. The second core is movably disposed at the upper end of the protrusion.

[0006] Preferably, the system also includes a base plate, wherein the first cavity plate is disposed at the upper end of the base plate, and the lower end of the second cavity plate contacts the upper end of the base plate.

[0007] Preferably, the positioning element includes a first shear pin and a second shear pin, wherein the first core is installed in the cavity via the first shear pin, and the bushing positioning core is installed in the cavity via the second shear pin.

[0008] As a further preferred embodiment, it also includes a first positioning sleeve and a second positioning sleeve. The second cavity plate has a first mounting hole and a second mounting hole. The first positioning sleeve is disposed in the first mounting hole, the second positioning sleeve is disposed in the second mounting hole, the first shearing pin is disposed in the first positioning sleeve, and the second shearing pin is disposed in the second positioning sleeve.

[0009] As a further preferred embodiment, it also includes a limiting cover, wherein the limiting cover is respectively provided on the outer side of the first positioning sleeve and the second positioning sleeve, and the limiting cover is connected to the second cavity plate; One end of the first positioning sleeve is threadedly connected to the first core, and one end of the second positioning sleeve is threadedly connected to the bushing positioning core. Limiting rings are respectively provided on the outer walls of the other ends of the first positioning sleeve and the second positioning sleeve, and the limiting rings are located inside the limiting cover.

[0010] Preferably, both the first shear pin and the second shear pin include a rod body, and a plurality of third mounting holes are provided on one side of the first cavity plate, with one end of the rod body inserted into the third mounting holes.

[0011] As a further preferred embodiment, a first stress groove and a second stress groove are formed on the outer wall of one end of the rod body, the first stress groove being directly opposite one side surface of the first cavity plate, and the second stress groove being directly opposite one side surface of the second cavity plate.

[0012] Preferably, the protrusion also includes a spring, with a groove at the upper end of the protrusion and the spring at the lower end of the second core, one end of the spring being connected to the inner wall of one side of the groove.

[0013] Preferably, the device also includes a handle, which is provided on the outer wall of the other side of the second cavity plate. Two retaining plates are provided at both ends of one side of the first cavity plate, and the second cavity plate is located between the two retaining plates.

[0014] A method of using a protective plate casting mold, comprising the protective plate casting mold, the method comprising: S1. First, install the first positioning sleeve in the first mounting hole, install the second positioning sleeve in the second mounting hole, then thread the first core to the first positioning sleeve, connect the bushing positioning core to the second positioning sleeve, and install the bushing on the bushing positioning core. S2. Then move the second cavity plate by the handle and place the second cavity plate between the two clamping plates, so that the lower end of the protrusion contacts the upper end of the base plate. At this time, a cavity is formed between the first cavity plate, the protrusion and the second cavity plate. S3. Then insert the first shear pin into the first positioning sleeve, and insert one end of the first shear pin into the third mounting hole, while insert the second shear pin into the second positioning sleeve, and insert one end of the second shear pin into the corresponding third mounting hole. S4. Then rotate the first positioning sleeve and the second positioning sleeve so that one end of the first positioning sleeve exits from the first core and the other end of the second positioning sleeve exits from the bushing positioning core, until the limiting rings on the first positioning sleeve and the second positioning sleeve contact the inner wall of the limiting cover. S5. Then, polyurethane raw material is poured through the pouring port at the upper end of the first cavity plate and the second cavity plate. During the curing and shrinkage process of the polyurethane raw material, it drives the first core and the bushing positioning core to move, causing the first shear pin and the second shear pin to break from the first stress groove and the second stress groove; at the same time, the second core moves and compresses the spring. S6. After the polyurethane raw material has cured, lift the second cavity plate upward by holding the handle and remove the second cavity plate from the first cavity plate. Then remove the product and take out the first core, the second core and the bushing positioning core.

[0015] The above technical solution has the following advantages or beneficial effects: (1) In this invention, by setting the positioning component and the spring, the first core, the second core and the bushing can shrink along with the polyurethane material during the curing and shrinking process of the polyurethane material, which effectively avoids the problem of the hole being stretched and the bushing being loosened. This can improve the molding quality of the antenna protection plate and meet the high precision requirements of the EMU train for the antenna protection plate. Attached Figure Description

[0016] Figure 1 This is a side sectional view of the protective plate casting mold in this invention; Figure 2 This is a front sectional view of the protective plate casting mold in this invention; Figure 3 This is a schematic diagram of the structure of the first type of cavity plate in this invention; Figure 4 This is a top view of the first type of cavity plate in this invention; Figure 5 This is a schematic diagram of the structure of the second type cavity plate in this invention; Figure 6 yes Figure 5 Sectional view along the middle AA direction; Figure 7 This is a schematic diagram of the structure of the first positioning sleeve or the second positioning sleeve in this invention; Figure 8 This is a schematic diagram of the structure of the first shearing pin or the second shearing pin in this invention; Figure 9 A schematic diagram of the structure of the second core in this invention; Figure 10 This is a diagram showing the usage state of the protective plate casting mold in this invention; Figure 11 This is a schematic diagram of the antenna shield.

[0017] In the diagram: 1. First cavity plate; 2. Second cavity plate; 3. First core; 4. Bushing positioning core; 5. Bushing; 6. Second core; 7. Protrusion; 8. Cavity; 9. Base plate; 10. First shear pin; 11. Second shear pin; 12. First positioning sleeve; 13. Second positioning sleeve; 14. First mounting hole; 15. Second mounting hole; 16. Limiting cover; 17. Limiting ring; 18. Rod body; 19. Third mounting hole; 20. First stress groove; 21. Second stress groove; 22. Spring; 23. Slide groove; 24. Handle; 25. Clamping plate; 26. Cutout; 27. Polyurethane raw material; 28. Antenna protection plate. Detailed Implementation

[0018] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] In the description of this invention, it should be noted that terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention. Furthermore, terms such as "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0020] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0021] Please see Figures 1 to 10The diagram illustrates a preferred embodiment of a protective plate casting mold, comprising a first cavity plate 1, a second cavity plate 2, a positioning element, a first core 3, a bushing positioning core 4, a bushing 5, and a second core 6. The second cavity plate 2 is disposed within the first cavity plate 1. The lower end of the second cavity plate 2 is bent to form a protrusion 7. A cavity 8 is formed between the second cavity plate 2, the protrusion 7, and the first cavity plate 1. A plurality of bushing positioning cores 4 and a plurality of first cores 3 are respectively installed within the cavity 8 via the positioning element. The second core 6 is movably disposed at the upper end of the protrusion 7. In this embodiment, the protrusion 7 is integrally formed with the second cavity plate 2, and the protrusion 7 abuts against the first cavity plate 1. The positioning element is used to install the first core 3 and the bushing positioning core 4, and the positioning element is capable of breaking under stress. When the polyurethane raw material 27 cures and shrinks, the first core 3 and the bushing positioning core 4 can move accordingly, thereby solving the problem of abnormal shrinkage at the hole and bushing 5 locations.

[0022] In this embodiment, by setting the positioning element, the problem of deformation and loosening of the hole and bushing 5 when the polyurethane raw material 27 is cured and shrunk due to the fixed position of the first core 3 and the bushing positioning core 4 is avoided. This can improve the quality of the product, reduce the production cost, and improve the production efficiency.

[0023] Furthermore, as a preferred embodiment, it also includes a base plate 9, with a first cavity plate 1 disposed at the upper end of the base plate 9, and the lower end of the second cavity plate 2 contacting the upper end of the base plate 9. The lower end of the first cavity plate 1 is connected to the base plate 9 by bolts.

[0024] Furthermore, in a preferred embodiment, the positioning component includes a first shear pin 10 and a second shear pin 11. The first core 3 is installed in the cavity 8 via the first shear pin 10, and the bushing positioning core 4 is installed in the cavity 8 via the second shear pin 11. The second cavity plate 2 has a first mounting hole 14 and a second mounting hole 15. The first positioning sleeve 12 is disposed in the first mounting hole 14, and the second positioning sleeve 13 is disposed in the second mounting hole 15. The first shear pin 10 is disposed in the first positioning sleeve 12, and the second shear pin 11 is disposed in the second positioning sleeve 13. Limiting covers 16 are respectively provided on the outer sides of the first positioning sleeve 12 and the second positioning sleeve 13, and the limiting covers 16 are connected to the second cavity plate 2. One end of the first positioning sleeve 12 is threadedly connected to the first core 3, and one end of the second positioning sleeve 13 is threadedly connected to the bushing positioning core 4. Limiting rings 17 are respectively provided on the outer walls of the other ends of the first positioning sleeve 12 and the second positioning sleeve 13, and the limiting rings 17 are located within the limiting covers 16. In this embodiment, threaded holes are provided at one end of the first core 3 and the bushing positioning core 4, and external threads that mate with the threaded holes are respectively provided on the outer wall of one end of the first shearing pin 10 and the second shearing pin 11. The limiting cover 16 is connected to the second cavity plate 2 by screws, and the limiting ring 17 is integrally connected to the first positioning sleeve 12 or the second positioning sleeve 13. The limiting ring 17 can cooperate with the limiting cover 16, which can prevent the first positioning sleeve 12 from disengaging from the first mounting hole 14 and the second positioning sleeve 13 from disengaging from the second mounting hole 15. When the limiting ring 17 contacts the inner wall of the limiting cover 16, the first positioning sleeve 12 is just disengaged from the first core 3, and the second positioning sleeve 13 is just disengaged from the bushing positioning core 4, so as to avoid affecting the movement of the first core 3 and the bushing positioning core 4. Before the polyurethane raw material 27 is poured, the first positioning sleeve 12 and the second positioning sleeve 13 are removed from the first core 3 and the bushing positioning core 4. When the polyurethane raw material 27 shrinks, the force generated causes the first shear pin 10 and the second shear pin 11 to break from the first stress groove 20 and the second stress groove 21, thereby allowing the first core 3 and the bushing positioning core 4 to move to accommodate the material shrinkage.

[0025] Furthermore, in a preferred embodiment, both the first shear pin 10 and the second shear pin 11 include a rod 18. A plurality of third mounting holes 19 are formed on one side of the first cavity plate 1, and one end of the rod 18 is inserted into one of the third mounting holes 19. A first stress groove 20 and a second stress groove 21 are formed on the outer wall of one end of the rod 18. The first stress groove 20 faces one side surface of the first cavity plate 1, and the second stress groove 21 faces one side surface of the second cavity plate 2. When one end of the rod 18 is fully inserted into the third mounting hole 19, the first stress groove 20 is exactly facing one side surface of the first cavity plate 1, and the second stress groove 21 is exactly facing one side surface of the second cavity plate 2, thus facilitating the breakage of the rod 18. See also... Figure 5As shown, there are four first mounting holes 14 and four second mounting holes 15. The four first mounting holes 14 are arranged in a rectangular shape, and the four second mounting holes 15 are arranged in a linear shape. The four second mounting holes 15 are located below the four first mounting holes 14.

[0026] Furthermore, as a preferred embodiment, it also includes a spring 22. A groove 23 is formed at the upper end of the protrusion 7, and the spring 22 is provided at the lower end of the second core 6. One end of the spring 22 is connected to one side of the inner wall of the groove 23. One end of the spring 22 is fixedly connected to the inner wall of the groove 23, while the lower end of the second core 6 is located within the groove 23. The structures of the second core 6 and the groove 23 can be found in [reference needed]. Figure 2 As shown. When the lower end of the second core 6 is installed in the slide groove 23, one side of the lower end of the second core 6 is inserted into the guide groove on the other side of the slide groove 23, and the lower surface of the second core 6 contacts the upper surface of the protrusion 7. This prevents the polyurethane material 27 from entering the slide groove 23. Even when the spring 22 is compressed, the lower end of the second core 6 completely covers the slide groove 23, preventing the polyurethane material 27 from entering the slide groove 23. When the polyurethane material 27 cures and shrinks, the second core 6 moves accordingly and compresses the spring 22.

[0027] Furthermore, as a preferred embodiment, a handle 24 is also included. A handle 24 is provided on the outer wall of the other side of the second cavity plate 2. Two retaining plates 25 are provided at both ends of one side of the first cavity plate 1, and the second cavity plate 2 is located between the two retaining plates 25. The handle 24 is connected to the second cavity plate 2 by bolts, thus facilitating the movement of the second cavity plate 2. The first cavity plate 1 and the two retaining plates 25 are integrally formed, and the retaining plates 25 are L-shaped, thus facilitating the locking of the first cavity plate 1.

[0028] In this embodiment, a cutout 26 is provided at the upper end of the first cavity plate 1 and the second cavity plate 2, and a pouring port is formed between the two cutouts 26 for pouring polyurethane raw material 27.

[0029] A method for using a protective plate casting mold, comprising the protective plate casting mold, the method of use including: S1. First, install the first positioning sleeve 12 in the first mounting hole 14, install the second positioning sleeve 13 in the second mounting hole 15, then thread the first core 3 to the first positioning sleeve 12, connect the bushing positioning core 4 to the second positioning sleeve 13, and install the bushing 5 on the bushing positioning core 4. S2. Then, move the second cavity plate 2 through the handle 24 and place the second cavity plate 2 between the two clamping plates 25, so that the lower end of the protrusion 7 contacts the upper end of the base plate 9. At this time, a cavity 8 is formed between the first cavity plate 1, the protrusion 7 and the second cavity plate 2. S3. Then insert the first shear pin 10 into the first positioning sleeve 12, and insert one end of the first shear pin 10 into the third mounting hole 19, while insert the second shear pin 11 into the second positioning sleeve 13, and insert one end of the second shear pin 11 into the corresponding third mounting hole 19. S4. Then rotate the first positioning sleeve 12 and the second positioning sleeve 13, so that one end of the first positioning sleeve 12 exits from the first core 3 and the other end of the second positioning sleeve 13 exits from the bushing positioning core 4, until the limiting ring 17 on the first positioning sleeve 12 and the second positioning sleeve 13 contacts the inner wall of the limiting cover 16; S5. Then pour polyurethane raw material 27 through the pouring port at the upper end of the first cavity plate 1 and the second cavity plate 2. During the curing and shrinkage process of the polyurethane raw material 27, it drives the first core 3 and the bushing positioning core 4 to move, so that the first shear pin 10 and the second shear pin 11 break from the first stress groove 20 and the second stress groove 21; at the same time, the second core 6 moves and compresses the spring 22. S6. After the polyurethane raw material 27 has cured, lift the second cavity plate 2 upward by holding the handle 24, remove the second cavity plate 2 from the first cavity plate 1, then remove the product, and remove the first core 3, the second core 6 and the bushing positioning core 4, leaving the bushing 5 in the product.

[0030] The above description is merely a preferred embodiment of the present invention and does not limit the implementation and protection scope of the present invention. Those skilled in the art should realize that any equivalent substitutions and obvious changes made based on the description and illustrations of the present invention should be included within the protection scope of the present invention.

Claims

1. A protective plate casting mold, characterized in that, It includes a first cavity plate, a second cavity plate, a positioning element, a first core, a bushing positioning core, a bushing, and a second core. The second cavity plate is disposed inside the first cavity plate. The lower end of the second cavity plate is bent to form a protrusion. A cavity is formed between the second cavity plate, the protrusion, and the first cavity plate. A plurality of bushing positioning cores and a plurality of first cores are respectively installed in the cavity through the positioning element. The second core is movably disposed at the upper end of the protrusion.

2. The protective plate casting mold as described in claim 1, characterized in that, It also includes a base plate, wherein the first cavity plate is disposed at the upper end of the base plate, and the lower end of the second cavity plate contacts the upper end of the base plate.

3. The protective plate casting mold as described in claim 1, characterized in that, The positioning element includes a first shear pin and a second shear pin. The first core is installed in the cavity via the first shear pin, and the bushing positioning core is installed in the cavity via the second shear pin.

4. The protective plate casting mold as described in claim 3, characterized in that, It also includes a first positioning sleeve and a second positioning sleeve. The second cavity plate has a first mounting hole and a second mounting hole. The first positioning sleeve is disposed in the first mounting hole, the second positioning sleeve is disposed in the second mounting hole, the first shearing pin is disposed in the first positioning sleeve, and the second shearing pin is disposed in the second positioning sleeve.

5. The protective plate casting mold as described in claim 4, characterized in that, It also includes a limiting cover, wherein the limiting cover is respectively provided on the outer side of the first positioning sleeve and the second positioning sleeve, and the limiting cover is connected to the second cavity plate; One end of the first positioning sleeve is threadedly connected to the first core, and one end of the second positioning sleeve is threadedly connected to the bushing positioning core. Limiting rings are respectively provided on the outer walls of the other ends of the first positioning sleeve and the second positioning sleeve, and the limiting rings are located inside the limiting cover.

6. The protective plate casting mold as described in claim 1, characterized in that, Both the first shear pin and the second shear pin include a rod body. A plurality of third mounting holes are provided on one side of the first cavity plate, and one end of the rod body is inserted into the third mounting hole.

7. The protective plate casting mold as described in claim 6, characterized in that, A first stress groove and a second stress groove are provided on the outer wall of one end of the rod. The first stress groove is directly opposite one side surface of the first cavity plate, and the second stress groove is directly opposite one side surface of the second cavity plate.

8. The protective plate casting mold as described in claim 1, characterized in that, It also includes a spring, with a groove at the upper end of the protrusion and the spring at the lower end of the second core, one end of the spring being connected to the inner wall of one side of the groove.

9. The protective plate casting mold as described in claim 1, characterized in that, It also includes a handle, which is provided on the outer wall of the other side of the second cavity plate. Two retaining plates are provided at both ends of one side of the first cavity plate, and the second cavity plate is located between the two retaining plates.

10. A method of using a protective plate casting mold, comprising the protective plate casting mold according to any one of claims 1-9, characterized in that, The method of use includes: S1. First, install the first positioning sleeve in the first mounting hole, install the second positioning sleeve in the second mounting hole, then thread the first core to the first positioning sleeve, connect the bushing positioning core to the second positioning sleeve, and install the bushing on the bushing positioning core. S2. Then move the second cavity plate by the handle and place the second cavity plate between the two clamping plates, so that the lower end of the protrusion contacts the upper end of the base plate. At this time, a cavity is formed between the first cavity plate, the protrusion and the second cavity plate. S3. Then insert the first shear pin into the first positioning sleeve, and insert one end of the first shear pin into the third mounting hole, while insert the second shear pin into the second positioning sleeve, and insert one end of the second shear pin into the corresponding third mounting hole. S4. Then rotate the first positioning sleeve and the second positioning sleeve so that one end of the first positioning sleeve exits from the first core and the other end of the second positioning sleeve exits from the bushing positioning core, until the limiting rings on the first positioning sleeve and the second positioning sleeve contact the inner wall of the limiting cover. S5. Then, polyurethane raw material is poured through the pouring port at the upper end of the first cavity plate and the second cavity plate. During the curing and shrinkage process of the polyurethane raw material, it drives the first core and the bushing positioning core to move, causing the first shear pin and the second shear pin to break from the first stress groove and the second stress groove; at the same time, the second core moves and compresses the spring. S6. After the polyurethane raw material has cured, lift the second cavity plate upward by holding the handle and remove the second cavity plate from the first cavity plate. Then remove the product and take out the first core, the second core and the bushing positioning core.

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