Precoated sand shooting forming mold for open-door train lap joint seat

Abstract

The utility model relates to a precoated sand shooting forming mould for a train open door car lap opening seat, which is applied to the field of production and processing of the train open door car lap opening seat and comprises a mould body, the mould body comprises a left mould and a right mould which are attached to each other, and sand injection openings are formed in the upper ends of the left mould and the right mould. The corresponding ends of the left mold and the right mold are each fixedly connected with two ejector rods, the two ejector rods are located on the diagonal lines of the mold body correspondingly, the two ejector rods on the left side movably penetrate through the right mold, and the two ejector rods on the right side movably penetrate through the left mold. According to the sand shooting mold, the size of the mold cavity in the mold is not prone to deviation when the left mold and the right mold shoot sand, so that the accuracy of the left mold and the right mold during mold closing and the stability during production are effectively improved, the situation that a mold shell has many burrs on the edge or molding fails is effectively avoided, and the molding effect is improved.

Description

Technical Field

[0001] This utility model relates to a coated sand injection molding die, and in particular to a coated sand injection molding die for use in the production and processing of train open-door car seat. Background Technology

[0002] Open wagons are a type of railway freight car characterized by being uncovered and having four side panels, with two side panels having foldable side doors for easy unloading of goods. The mortise and tenon joint is a part used to fix the side doors or end doors of the open wagon. The mortise and tenon joint needs to be produced using a mold shell, and the production of the mold shell requires the use of molds.

[0003] The specification of Chinese Patent Publication No. CN210877434U discloses a sand-jetting mold for brake disc connecting rib cores of light rail passenger vehicles. This utility model can make the operation of filling coated sand time-saving and labor-saving, improve production efficiency, improve the filling quality of coated sand, improve the yield of brake disc connecting rib cores, and quickly remove the brake disc connecting rib cores from the annular mold cavity during the mold opening process after the brake disc connecting rib cores are formed.

[0004] However, the above-mentioned patent still has the following problems in actual application: During the process of mold closing between the upper and lower molds, no limiting components are set outside the mold, which may cause misalignment during the mold closing process. The size deviation of the mold cavity inside the mold causes the sand to overflow from the gap during sand injection, forming irregular burrs and causing molding failure. Utility Model Content

[0005] The technical problem to be solved by this utility model in view of the above-mentioned prior art is that the existing sand-shooting molding mold does not have a limiting component when in use, which makes the mold prone to misalignment when the mold is closed, resulting in deviation of the internal mold cavity size, thus causing molding failure, a large number of burrs on the edge of the mold shell, etc.

[0006] To address the aforementioned problems, this utility model provides a coated sand injection molding die for a train open-door car seat, comprising a die body, which includes a left die and a right die that fit together. Both the left and right die have sand injection ports at their upper ends. Two ejector rods are fixedly connected to corresponding ends of the left and right die, located diagonally opposite each other on the die body. The two ejector rods on the left side movably pass through the right die, and the two ejector rods on the right side movably pass through the left die. A set of sliding rods is fixedly connected to the ends of the left and right die that are furthest apart, and these two sets of sliding rods movably pass through the left and right die respectively. Two auxiliary plates are respectively movably mounted. Limiting components are provided at both the front and rear ends of the mold body. The limiting components include a positioning plate fixedly connected to the surface of the left mold and a mounting plate fixedly connected to the surface of the right mold. Two compression springs are fixedly connected to the upper end of the mounting plate. The upper ends of the two compression springs are jointly fixedly connected to a locking plate. Two mounting rods are also fixedly connected to the upper end of the mounting plate. The upper ends of the mounting rods move through the adjacent compression springs and locking plates in sequence. A locking block is fixedly connected to the left end of the locking plate. A locking groove is chiseled at the lower end of the positioning plate. The locking block is located in the locking groove. A fixing plate is also fixedly connected to the outer end of the right mold. A cylinder is fixedly connected to the lower end of the fixing plate.

[0007] In the above-mentioned sand-shooting mold for the connecting seat of the open-door train car, by setting a limiting component and an ejector rod, the left mold and the right mold are mutually limited when they are closed. This makes it less likely for the internal mold cavity dimensions of the left mold and the right mold to deviate during sand shooting, thereby effectively improving the accuracy of the left mold and the right mold when they are closed and the stability during production. It also effectively avoids the occurrence of many edge burrs or molding failures in the mold shell, thereby improving the molding effect.

[0008] As a further improvement of this application, the ejector pin is magnetic and attracts the auxiliary plate, with the end of the auxiliary plate close to the mold body fitting against the ejector pin.

[0009] As a further improvement to this application, the positioning plate is located above the mounting plate, and the fixing plate is located above the positioning plate.

[0010] As a further improvement of this application, the end of the card block near the positioning plate is rounded, the upper end of the card block is beveled, and the lower end of the cylinder faces the center of the mounting plate.

[0011] As another improvement of this application, a mounting block is fixedly connected to the lower end of the positioning plate, a pressure sensor is fixedly connected to the right end of the mounting block, and a touch rod is fixedly connected to the lower end of the card plate.

[0012] As a further improvement to this application, the touch bar is L-shaped overall, and the end of the touch bar away from the card plate contacts the pressure sensor and is rounded.

[0013] In summary, during practical application, the left and right molds move towards the center simultaneously, causing the ejector pin on the left to pass through the right mold and the ejector pin on the right to pass through the left mold. The ejector pins push the auxiliary plates on both sides outward. At this time, the locking block contacts the positioning plate, and the pressure causes the compression spring to contract downward, moving the locking plate downward. As the mold body moves, the positioning plate and the locking plate approach each other until the locking block is located inside the locking groove, at which point the left and right molds fit together, thus completing the mold closing process. This makes it less likely for the internal mold cavity dimensions to deviate, effectively improving the accuracy of the left and right mold closing and the stability during production. It also effectively avoids situations such as excessive edge burrs or molding failure in the mold shell, thereby improving the molding effect. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the first embodiment of this application;

[0015] Figure 2 This is a front view of the structure according to the first embodiment of this application;

[0016] Figure 3 This is a schematic diagram of the mold body structure according to the first embodiment of this application;

[0017] Figure 4 This is an exploded view of the mold body according to the first embodiment of this application;

[0018] Figure 5 This is a schematic diagram of the limiting component structure according to the first embodiment of this application;

[0019] Figure 6 This is a schematic diagram of the card block structure according to the first embodiment of this application;

[0020] Figure 7 This is a schematic diagram of the limiting component structure according to the second embodiment of this application.

[0021] Explanation of the labels in the diagram:

[0022] 1. Left mold, 2. Right mold, 3. Sand injection port, 4. Ejector rod, 5. Auxiliary plate, 6. Slide rod, 7. Positioning plate, 8. Mounting plate, 9. Compression spring, 10. Clamping plate, 11. Mounting rod, 12. Clamping block, 13. Clamping slot, 14. Cylinder, 15. Pressure sensor, 16. Touch rod. Detailed Implementation

[0023] The two embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0024] First implementation method:

[0025] Figure 1 , Figure 2 , Figure 3 and Figure 4The following is illustrated: A coated sand-shooting mold for a train open-door car seat, comprising a mold body, including a left mold 1 and a right mold 2 that fit together. Both the left mold 1 and the right mold 2 have sand injection ports 3 at their upper ends to facilitate sand injection into the mold body via a sand-shooting machine. The left mold 1 and the right mold 2 are designed with a separation point for upper and lower parting, allowing for smooth flow of molten iron during casting, resulting in better final product molding and effectively reducing shrinkage. Two ejector rods 4 are fixedly connected to corresponding ends of the left mold 1 and the right mold 2. The two ejector rods 4 are located diagonally opposite each other on the mold body. The two ejector rods 4 on the left side move through the right mold 2, and the two ejector rods 4 on the right side move through the left mold 1. The ejector rods 4 are magnetic and attract to an auxiliary plate 5. After closing, as the left mold 1 and right mold 2 move continuously, the ejector rod 4 pushes the auxiliary plate 5 to slide on the slide rod 6, thus prompting the operator to start closing the left mold 1 and right mold 2. The end of the auxiliary plate 5 closest to the mold body is in contact with the ejector rod 4. The ejector rod 4 is magnetic and attracts the auxiliary plate 5. The end of the auxiliary plate 5 closest to the mold body is in contact with the ejector rod 4. After the mold shell is formed, when the left mold 1 and right mold 2 separate, the ejector rod 4 also moves accordingly, and drives the auxiliary plate 5 to move towards the mold body until the auxiliary plate 5 is in contact with the mold body. Then the ejector rod 4 separates from the auxiliary plate 5. A set of slide rods 6 is fixedly connected to the ends of the left mold 1 and right mold 2 that are far apart. The two sets of slide rods 6 move through the left mold 1 and right mold 2 respectively. The ends of the two sets of slide rods 6 that are far apart from each other are respectively fitted with two auxiliary plates 5.

[0026] Figure 1 , Figure 2 , Figure 5 and Figure 6The diagram shows that limiting components are provided at both the front and rear ends of the mold body. These limiting components include a positioning plate 7 fixedly connected to the surface of the left mold 1 and a mounting plate 8 fixedly connected to the surface of the right mold 2. The positioning plate 7 is located above the mounting plate 8, and a fixing plate is located above the positioning plate 7. Two compression springs 9 are fixedly connected to the upper end of the mounting plate 8, and a locking plate 10 is fixedly connected to the upper end of both compression springs 9. Two mounting rods 11 are also fixedly connected to the upper end of the mounting plate 8. The upper ends of the mounting rods 11 sequentially pass through adjacent compression springs 9 and locking plates 10. A locking block 12 is fixedly connected to the left end of the locking plate 10. The end of the locking block 12 near the positioning plate 7 has rounded corners, and the upper end of the locking block 12 is a bevel. A slot 13 is chiseled at the lower end of the positioning plate 7, and the locking block 12 is located within the slot 13. A fixing plate is also fixedly connected to the outer end of the right mold 2. A cylinder 14 is fixedly connected to the lower end of the plate. Those skilled in the art can select a suitable model of cylinder 14 according to actual needs, such as SCD50x100-100-LB. The lower end of the cylinder 14 faces the center of the mounting plate 8. As the left mold 1 and the right mold 2 move, the locking block 12 contacts the positioning plate 7. The pressure causes the compression spring 9 to contract downward, and the locking plate 10 moves downward. As the mold body moves, the positioning plate 7 and the locking plate 10 approach each other until the locking block 12 is located inside the locking groove 13. At this time, the left mold 1 and the right mold 2 fit together, thereby completing the mold closing process. After the mold shell is formed, the cylinder 14 can be activated to extend. The extended end of the cylinder 14 drives the locking plate 10 to move downward, thereby separating the locking block 12 from the locking groove 13. At this time, the left mold 1 and the right mold 2 can be separated to obtain the formed mold shell.

[0027] During mold body closing, the left mold 1 and right mold 2 move towards the center simultaneously, causing the ejector pin 4 on the left to move through the right mold 2 and the ejector pin 4 on the right to move through the left mold 1. The ejector pins 4 push the auxiliary plates 5 on both sides to move outward. At this time, the locking block 12 contacts the positioning plate 7, and the pressure causes the compression spring 9 to contract downward, and the locking plate 10 moves downward. As the mold body moves, the positioning plate 7 and the locking plate 10 approach each other until the locking block 12 is located inside the locking groove 13, at which point the left mold 1 and right mold 2 fit together, thus completing the mold closing process. At this time, sand is injected into the mold body through the sand injection port 3 by the sand injection machine. The sand is shot to complete the molding of the mold shell. After the mold shell is formed, the cylinder 14 can be activated to extend. The extended end of the cylinder 14 drives the clamping plate 10 to move downward, thereby separating the clamping block 12 from the clamping groove 13. At this time, the left mold 1 and the right mold 2 are separated and demolded to obtain the mold shell. The mold body can be limited by the limiting component and the ejector rod 4, so that the internal mold cavity size is not prone to deviation. This effectively improves the accuracy of the left mold 1 and the right mold 2 when they are closed and the stability during production. It effectively avoids the mold shell from having too many edge burrs or molding failure, thereby improving the molding effect.

[0028] Second implementation method:

[0029] This embodiment adds a pressure sensor 15 and a touch rod 16 to the first embodiment, while the rest remains the same as the first embodiment.

[0030] Figure 7 As shown: A mounting block is fixedly connected to the lower end of the positioning plate 7, and a pressure sensor 15 is fixedly connected to the right end of the mounting block. A touch rod 16 is fixedly connected to the lower end of the clamping plate 10. The touch rod 16 is L-shaped, and the end of the touch rod 16 away from the clamping plate 10 contacts the pressure sensor 15 and is rounded. When the clamping block 12 is inserted into the clamping slot 13, the clamping plate 10 will move upward as the compression spring 9 returns to its original position. The rounded touch rod 16 facilitates the sliding of the touch rod 16.

[0031] When the positioning plate 7 and the clamping plate 10 move toward the center at the same time, the touch rod 16 also moves toward the pressure sensor 15. After the clamping block 12 is in the clamping groove 13, the touch rod 16 contacts the pressure sensor 15, thereby indicating to the operator that the left mold 1 and the right mold 2 have been closed, which makes it easier for the operator to inject sand into the mold body.

[0032] In light of current practical needs, the above-described embodiments adopted in this application are not limited to these. Any changes made within the scope of knowledge possessed by those skilled in the art without departing from the concept of this application still fall within the protection scope of this utility model.

Claims

1. A sand-coated sand shot forming mold for a gondola car bolster, comprising a mold body, characterized by: The mold body includes a left mold (1) and a right mold (2) that fit together. Both the left mold (1) and the right mold (2) have sand injection ports (3) at their upper ends. Two push rods (4) are fixedly connected to the corresponding ends of the left mold (1) and the right mold (2). The two push rods (4) are located on the diagonal of the mold body. The two push rods (4) on the left side move through the right mold (2), and the two push rods (4) on the right side move through the left mold (1). A set of sliding rods (6) are fixedly connected to the ends of the left mold (1) and the right mold (2) that are far apart. The two sets of sliding rods (6) move through the left mold (1) and the right mold (2) respectively. Two auxiliary plates (5) are movably sleeved on the ends of the two sets of sliding rods (6) that are far apart. The mold body is provided with limiting components at both the front and rear ends. The limiting components include a positioning plate (7) fixedly connected to the surface of the left mold (1) and an mounting plate (8) fixedly connected to the surface of the right mold (2). Two compression springs (9) are fixedly connected to the upper end of the mounting plate (8). The upper ends of the two compression springs (9) are fixedly connected to a clamping plate (10). Two mounting rods (11) are also fixedly connected to the upper end of the mounting plate (8). The upper ends of the mounting rods (11) move through the adjacent compression springs (9) and clamping plates (10) in sequence. A clamping block (12) is fixedly connected to the left end of the clamping plate (10). A clamping groove (13) is chiseled at the lower end of the positioning plate (7). The clamping block (12) is located in the clamping groove (13). A fixing plate is also fixedly connected to the outer end of the right mold (2). A cylinder (14) is fixedly connected to the lower end of the fixing plate.

2. The sand molding die for a gondola car bolster according to claim 1, wherein: The ejector rod (4) is magnetic, and the ejector rod (4) is attracted to the auxiliary plate (5). The end of the auxiliary plate (5) near the mold body is in contact with the ejector rod (4).

3. The sand molding die for a gondola car bolster according to claim 1, wherein: The positioning plate (7) is located above the mounting plate (8), and the fixing plate is located above the positioning plate (7).

4. The sand molding die for a gondola car bolster according to claim 3, wherein: The end of the card block (12) near the positioning plate (7) is rounded, the upper end of the card block (12) is inclined, and the lower end of the cylinder (14) faces the center of the mounting plate (8).

5. The sand molding die for a gondola car bolster according to claim 1, wherein: The lower end of the positioning plate (7) is fixedly connected to an installation block, the right end of the installation block is fixedly connected to a pressure sensor (15), and the lower end of the card plate (10) is fixedly connected to a touch rod (16).

6. The sand molding die for a gondola car bolster according to claim 5, wherein: The touch rod (16) is L-shaped, and the end of the touch rod (16) away from the card plate (10) is in contact with the pressure sensor (15) and is rounded.

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