Casting mold for manufacturing railway accessories

Abstract

The utility model relates to the technical field of casting equipment, and discloses a casting die for manufacturing railway accessories, which comprises an upper die holder and a lower die holder, a casting gate is arranged on one side of the top of the upper die holder, a plurality of guide posts are arranged at the bottom of the upper die holder, a first forming groove is arranged at the bottom of the upper die holder, and a plurality of guide grooves are arranged at the top of the lower die holder. A second forming groove is further formed in the top of the lower die base, and an air guide hole is formed in the center of the bottom in the second forming groove. The air guide hole, the flow dividing groove and the counter bore are formed in the lower die base, the first sealing block and the third sealing block are movably installed in the air guide hole, after the upper die base and the lower die base are separated, external high-pressure gas can be filled between an accessory and the second forming groove, direct contact between the die and the accessory can be reduced, friction and abrasion are reduced, and the service life of the die is prolonged. And the surface quality of the upper mold base, the lower mold base and the accessories is protected, and deformation or cracks caused by uneven stress in the demolding process of the accessories can be avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of casting equipment, in particular to a casting mold for manufacturing railway accessories. Background Art

[0002] Casting molds play a vital role in the production of railway parts. They not only ensure the precision and consistency of the parts, but also greatly improve production efficiency. The molds are mostly made of high-temperature and corrosion-resistant metals to ensure that they can withstand high temperatures and high pressures without deformation during the casting process. These molds pre-shape the structural shape of the parts. Then, using the casting process, molten metal or alloy is poured into the mold. After cooling and solidification, the mold forms a railway part with a specific shape and size.

[0003] When demolding molded accessories, accessories made of different materials exhibit different adhesion during demolding. Some materials with strong viscosity or high hardness are more likely to cause demolding difficulties. At the same time, during the use of the mold, the mold temperature is too high or too low, which may affect the shrinkage rate and adhesion of the accessories, and thus affect the demolding effect, thereby reducing the efficiency of the accessory molding and demolding process. Utility Model Content

[0004] The purpose of the utility model is to provide a casting mold for manufacturing railway accessories, which can effectively solve the problems in the background technology.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] A casting mold for manufacturing railway accessories includes an upper mold base and a lower mold base, a casting port is provided on one side of the top of the upper mold base, a plurality of guide columns are provided at the bottom of the upper mold base, a first molding groove is provided at the bottom of the upper mold base, a plurality of guide grooves are provided at the top of the lower mold base, the guide grooves are used to connect the guide columns, a second molding groove is also provided at the top of the lower mold base, an air guide hole is provided at the bottom center of the second molding groove, a first sealing block is slidably connected to the air guide hole, and a bottom shell is provided at the bottom of the lower mold base at the air guide hole.

[0007] As a further preferred solution of the present invention, a sealing groove is provided at the bottom of the lower mold base at the air guide hole.

[0008] As a further preferred embodiment of the present invention, a sealing groove is provided at the bottom of the lower die base located at the periphery of the air guide hole;

[0009] Based on this, by opening a sealing groove, the connection sealing between the bottom shell and the lower mold base can be improved.

[0010] As a further preferred embodiment of the present invention, a plurality of diversion grooves are provided on the inner side of the air guide hole, a plurality of countersunk holes are provided on the top of the diversion groove, and the second forming groove and the diversion groove are connected through the countersunk holes. A sealing shaft is inserted into the countersunk hole, and a second sealing block is fixedly installed on the top of the sealing shaft. The second sealing block is inserted into the countersunk hole, and the top surface of the second sealing block is at the same horizontal position as the bottom surface of the second forming groove.

[0011] Based on this, by opening the air guide holes, the diversion grooves and the countersunk holes, the external high-pressure gas can be introduced into the second molding groove, and the countersunk holes can be sealed by the sealing shaft and the second sealing block during casting.

[0012] As a further preferred solution of the present invention, a sliding groove is provided on the inner side of the air guide hole between the two diversion grooves, and a fixing screw is threadedly connected to the inner surface of the sliding groove.

[0013] As a further preferred embodiment of the present invention, a sealing ring is fixedly installed on the top of the bottom shell, and a connecting screw seat is fixedly installed on the bottom of the bottom shell. The bottom shell is fixedly installed on the bottom of the lower mold base by a fixing screw, and the sealing ring is inserted into the sealing groove. The connecting screw seat is connected to the output end of the external air compressor through a pipeline.

[0014] Based on this, with the help of the setting of the bottom shell, the inner cavity of the air guide hole can be closed in cooperation with the central column.

[0015] As a further preferred embodiment of the present invention, a third sealing block is fixedly installed at the bottom of the first sealing block, a plurality of sliders are fixedly installed on the outside of the third sealing block, a sliding hole is provided in the slider, the first sealing block is inserted and installed in the air guide hole through the third sealing block, the slider is slidably installed in the corresponding slide groove, the sliding hole is slidably sleeved on the outside of the fixed screw, a compression spring is sleeved on the outside of the fixed screw, the top end of the compression spring is in contact with the bottom surface of the slider, and the bottom end of the compression spring is in contact with the bottom surface of the inner side of the slide groove;

[0016] Based on this, by setting the fixed screw and the compression spring, the first sealing block and the third sealing block can normally seal the top of the air guide hole. After the center column is inserted into the air guide hole and cooperates with the first molding groove and the second molding groove to form a complete casting cavity, the first sealing block and the third sealing block can be forced to move downward without affecting the use of the center column.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] In the present invention, an air guide hole, a diversion groove and a countersunk hole are opened in the lower mold base, and a first sealing block and a third sealing block are movably installed in the air guide hole. After the upper mold base and the lower mold base are separated, external high-pressure gas can be used to fill the space between the accessory and the second molding groove, which can reduce direct contact between the mold and the accessory, reduce friction and wear, protect the surface quality of the upper mold base, the lower mold base and the accessory, and help avoid deformation or cracks of the accessory due to uneven force during the demolding process. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0020] Figure 2 This is a bottom view of the upper die base of the utility model;

[0021] Figure 3 This is a cross-sectional view of the lower die base of the utility model;

[0022] Figure 4 This is a partial cross-sectional view of the lower die base of the utility model

[0023] Figure 5 for Figure 3 Enlarged view of point A in the middle;

[0024] Figure 6 for Figure 3 Enlarged view of point B in the middle;

[0025] Figure 7 This is a schematic diagram of the bottom shell structure of the present utility model;

[0026] Figure 8 This is a schematic structural diagram of the first sealing block of the present utility model.

[0027] In the figure: 1. Upper die base; 2. Lower die base; 3. Casting gate; 4. Guide column; 5. Center column; 6. Guide groove; 7. First molding groove; 8. Bottom shell; 9. Air guide hole; 10. First sealing block; 11. Sealing groove; 12. Diverter groove; 13. Countersunk hole; 14. Sealing shaft; 15. Second sealing block; 16. Slide groove; 17. Fixed screw; 18. Compression spring; 19. Sealing ring; 20. Connecting screw seat; 21. Third sealing block; 22. Slider; 23. Slide hole; 24. Second molding groove. DETAILED DESCRIPTION

[0028] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0029] like Figures 1-8As shown, the casting mold for manufacturing railway accessories provided by the utility model includes an upper mold base 1 and a lower mold base 2. A casting port 3 is provided on one side of the top of the upper mold base 1, and a plurality of guide columns 4 are provided at the bottom of the upper mold base 1. A first molding groove 7 is provided at the bottom of the upper mold base 1, and a plurality of guide grooves 6 are provided on the top of the lower mold base 2. The guide grooves 6 are used to connect the guide columns 4. A second molding groove 24 is also provided on the top of the lower mold base 2. An air guide hole 9 is provided at the center of the bottom of the second molding groove 24. A first sealing block 10 is slidably connected to the air guide hole 9. A bottom shell 8 is provided at the bottom of the lower mold base 2 at the air guide hole 9.

[0030] like Figure 1-Figure 2 As shown, a center column 5 is fixedly installed at the top center position of the first molding groove 7, and a sealing groove 11 is opened at the bottom of the lower mold base 2 at the air guide hole 9. With the opening of the sealing groove 11, the connection sealing performance between the bottom shell 8 and the lower mold base 2 can be improved.

[0031] like Figure 2-Figure 8As shown, a plurality of diversion grooves 12 are opened on the inner side of the air guide hole 9, and a plurality of countersunk holes 13 are opened on the top of the diversion groove 12. The second forming groove 24 is connected to the diversion groove 12 through the countersunk hole 13. A sealing shaft 14 is inserted and installed in the countersunk hole 13. A second sealing block 15 is fixedly installed on the top of the sealing shaft 14. The second sealing block 15 is inserted and installed in the countersunk hole 13, and the top surface of the second sealing block 15 is at the same horizontal position as the bottom surface of the second forming groove 24. By opening the air guide hole 9, the diversion groove 12 and the countersunk hole 13, the external high pressure The gas is introduced into the second molding groove 24, and the countersunk hole 13 is sealed by the sealing shaft 14 and the second sealing block 15 during casting. A slide groove 16 is provided on the inner side of the air guide hole 9 between the two diversion grooves 12. A fixing screw 17 is connected to the inner thread of the slide groove 16. A sealing ring 19 is fixedly installed on the top of the bottom shell 8, and a connecting screw seat 20 is fixedly installed on the bottom of the bottom shell 8. The bottom shell 8 is fixedly installed on the bottom of the lower mold base 2 through the fixing screw 17, and the sealing ring 19 is inserted into the sealing groove 11. The connecting screw seat 20 is connected to the outer mold base 2 through a pipeline. The output end of the air compression equipment is connected to the bottom of the air guide hole 9. With the help of the setting of the bottom shell 8, the inner cavity of the air guide hole 9 can be sealed in conjunction with the center column 5. The third sealing block 21 is fixedly installed on the bottom of the first sealing block 10. A plurality of sliders 22 are fixedly installed on the outside of the third sealing block 21. A sliding hole 23 is opened in the slider 22. The first sealing block 10 is inserted and installed in the air guide hole 9 through the third sealing block 21. The slider 22 is slidably installed in the corresponding slide groove 16. The sliding hole 23 is slidably sleeved on the outside of the fixed screw 17. The outside of the fixed screw 17 is sleeved with a compression screw. The compression spring 18, the top end of the compression spring 18 is against the bottom surface of the slider 22, and the bottom end of the compression spring 18 is against the bottom surface of the inner side of the slide groove 16. By setting the fixing screw 17 and the compression spring 18, the first sealing block 10 and the third sealing block 21 can normally seal the top of the air guide hole 9. After the center column 5 is inserted into the air guide hole 9 and cooperates with the first molding groove 7 and the second molding groove 24 to form a complete casting cavity, the first sealing block 10 and the third sealing block 21 can be forced to move downward without affecting the use of the center column 5.

[0032] It should be noted that the present invention is a casting mold for manufacturing railway accessories. After the upper mold base 1 and the lower mold base 2 are clamped together by the mold frame, the molten metal can be injected into the cavity formed by the first molding groove 7 and the second molding groove 24 through the casting port 3 by the casting equipment. Subsequently, when the molten metal is cooled and shaped, the upper mold base 1 can be lifted and lowered by the external mold frame to separate the upper mold base 1 from the lower mold base 2, and the upper mold base 1 drives the center column 5 to be withdrawn from the air guide hole 9, so that the first sealing block 10 is no longer limited by the center column 5. As a result, the compression springs 18 on the outside of the multiple fixing screws 17 stretch and rebound. Thereby, the corresponding slider 22 is pushed up in the slide groove 16, and then the multiple sliders 22 drive the third sealing block 21 and the first sealing block 10 to move up and seal the top of the air guide hole 9. Then, with the help of external air compression equipment and the cooperation of pipelines and bottom shell 8, high-pressure air is injected into the air guide hole 9, and the high-pressure gas is diverted through multiple diversion grooves 12, so that the high-pressure gas enters the multiple countersunk holes 13 and pushes up the sealing shaft 14, so that the multiple sealing shafts 14 synchronously pass through the second sealing block 15 at the top to push out the accessories located in the second molding groove 24, and at the same time, realize the cooling treatment of the accessories.

[0033] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed in this invention is defined by the appended claims and their equivalents.

Claims

1. A casting mold for manufacturing railway accessories, characterized by: The invention comprises an upper die base (1) and a lower die base (2), wherein a casting port (3) is provided on one side of the top of the upper die base (1), a plurality of guide columns (4) are provided on the bottom of the upper die base (1), a first forming groove (7) is provided on the bottom of the upper die base (1), a plurality of guide grooves (6) are provided on the top of the lower die base (2), and the guide grooves (6) are used to connect the guide columns (4), a second forming groove (24) is also provided on the top of the lower die base (2), an air guide hole (9) is provided at the center of the bottom of the second forming groove (24), a first sealing block (10) is slidably connected in the air guide hole (9), and a bottom shell (8) is provided on the bottom of the lower die base (2) at the air guide hole (9).

2. The casting mold for manufacturing railway accessories according to claim 1, characterized in that: A center column (5) is fixedly installed at the top center position in the first forming groove (7).

3. The casting mold for manufacturing railway accessories according to claim 2, characterized in that: A sealing groove (11) is provided at the bottom of the lower die base (2) at the air guide hole (9).

4. The casting mold for manufacturing railway accessories according to claim 3, characterized in that: A plurality of diversion grooves (12) are provided on the inner side of the air guide hole (9), and a plurality of countersunk holes (13) are provided on the top of the diversion groove (12), so that the second forming groove (24) and the diversion groove (12) are connected through the countersunk holes (13). A sealing shaft (14) is inserted and installed in the countersunk hole (13), and a second sealing block (15) is fixedly installed on the top of the sealing shaft (14). The second sealing block (15) is inserted and installed in the countersunk hole (13), and the top surface of the second sealing block (15) is at the same horizontal position as the bottom surface of the second forming groove (24).

5. The casting mold for manufacturing railway accessories according to claim 4, characterized in that: A sliding groove (16) is provided on the inner side of the air guide hole (9) between the two diversion grooves (12), and a fixing screw (17) is connected to the inner thread of the sliding groove (16).

6. The casting mold for manufacturing railway accessories according to claim 5, characterized in that: A sealing ring (19) is fixedly installed on the top of the bottom shell (8), and a connecting screw seat (20) is fixedly installed on the bottom of the bottom shell (8). The bottom shell (8) is fixedly installed on the bottom of the lower mold base (2) through a fixing screw (17), and the sealing ring (19) is inserted into the sealing groove (11). The connecting screw seat (20) is connected to the output end of the external air compression equipment through a pipeline.

7. The casting mold for manufacturing railway accessories according to claim 6, characterized in that: A third sealing block (21) is fixedly installed at the bottom of the first sealing block (10), and a plurality of sliders (22) are fixedly installed on the outside of the third sealing block (21). A sliding hole (23) is provided in the slider (22). The first sealing block (10) is inserted into the air guide hole (9) through the third sealing block (21). The slider (22) is slidably installed in the corresponding slide groove (16). The sliding hole (23) is slidably sleeved on the outside of the fixed screw (17). A compression spring (18) is sleeved on the outside of the fixed screw (17). The top end of the compression spring (18) is against the bottom surface of the slider (22), and the bottom end of the compression spring (18) is against the bottom surface of the inner side of the slide groove (16).

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