Forming die for upper claw and lower claw of sternum plate

Abstract

The utility model discloses a sternum plate upper and lower claw forming die which comprises a one-time forming die. Each of the primary forming mold and the secondary forming mold comprises an upper mold plate and a lower mold plate; the one-time forming die further comprises a one-time male die and a one-time female die, wherein the one-time male die is installed on the upper die plate; the primary female die is installed on the lower die plate, the primary female die is provided with a primary die cavity, and the primary male die is matched with the primary die cavity; the positioning plate is arranged in the primary die cavity, and a second positioning pin hole is formed in the positioning plate; the positioning pin is matched with the first positioning pin hole and the second positioning pin hole; the polyurethane rubber is arranged on the primary female die, and the polyurethane rubber abuts against the positioning plate. The upper claw and the lower claw of the sternum plate are formed through the primary forming die and the secondary forming die respectively, the forming difficulty of the upper claw and the lower claw of the sternum plate is lowered, the sternum plate can be fixed conveniently in the forming process, and therefore the size of the formed sternum plate is more stable.

Description

Technical Field

[0001] This utility model relates to the field of sternal plate mold technology, specifically a sternal plate upper and lower claw forming mold. Background Technology

[0002] The sternal plate is used for sternal fixation after median sternotomy. Depending on the shape of the sternum, the sternal plate consists of an upper jaw, a lower jaw, and a locking mechanism. Typically, the upper and lower jaws are formed directly in one molding process using a punch and a die. However, due to the irregular shapes of the upper and lower jaws, displacement occurs during molding, resulting in unstable dimensions. Utility Model Content

[0003] The technical problem to be solved by this utility model is: to provide a sternal plate upper and lower claw forming mold to solve the problem of unstable sternal plate forming dimensions in the existing molds.

[0004] The technical solution adopted by this utility model to solve the technical problem of the device is as follows: a sternal plate upper and lower claw forming mold, comprising: a primary forming mold; a secondary forming mold, both the primary forming mold and the secondary forming mold comprising an upper template and a lower template; the primary forming mold further comprising: a primary punch, the primary punch being installed on the upper template; a primary die, the primary die being installed on the lower template, the primary die having a primary mold cavity, the primary punch being adapted to the primary mold cavity; a sternal plate, the sternal plate being at least partially located between the primary mold cavity and the primary punch, the sternal plate having a first positioning pin hole; a positioning plate, the positioning plate being placed in the primary mold cavity, the positioning plate having a second positioning pin hole; a positioning pin, the positioning pin being adapted to the first positioning pin hole and the second positioning pin hole; and polyurethane rubber, the polyurethane rubber being disposed in the primary die, the polyurethane rubber abutting against the positioning plate.

[0005] The beneficial effects of this invention are as follows: By using a primary molding die and a secondary molding die to form the upper and lower claws of the sternal plate separately, the forming difficulty of the upper and lower claws of the sternal plate is reduced, making it easier to fix the sternal plate during the forming process, thereby making the dimensions of the formed sternal plate more stable. During the primary molding process, the primary punch is pressed into the primary mold cavity. Since the sternal plate is located between the primary mold cavity and the primary punch, the sternal plate will bend during the pressing process, thus forming the upper or lower claw. During the primary molding process, a positioning pin connects the positioning plate to the sternal plate into a whole. Furthermore, before and during the primary molding process, polyurethane rubber continuously holds the positioning plate in place, preventing the sternal plate from shifting and improving the dimensional stability of the formed sternal plate. The dimensions of the positioning plate are matched with the primary mold cavity, which guides the positioning plate. The primary die has a groove to accommodate the polyurethane rubber, which can deform under pressure during the primary molding process. Preferably, the positioning plate is provided with a limiting groove to accommodate the sternal plate, which restricts the planar freedom of the sternal plate and further improves the stability of the sternal plate forming dimensions.

[0006] Preferably, both the primary molding die and the secondary molding die include:

[0007] Guide sleeve, the guide sleeve is installed on the upper template, and a guide space is provided inside the guide sleeve;

[0008] Guide columns are installed on the lower template and are adapted to guide space.

[0009] Preferably, the one-piece molding die further includes:

[0010] A connecting column, one end of which is connected to a positioning plate;

[0011] Guide hole: The lower template is provided with a guide hole, and the other end of the connecting column is movably set in the guide hole.

[0012] Preferably, the secondary molding die includes:

[0013] Secondary punch, the secondary punch is installed on the upper template;

[0014] The secondary die is installed on the lower template and has a secondary cavity. The secondary punch is adapted to the secondary cavity.

[0015] Preferably, the secondary molding die further includes:

[0016] The third locating pin hole is located in the secondary punch.

[0017] The movable mandrel is adapted to the third positioning pin hole and the first positioning pin hole.

[0018] Preferably, both the primary molding die and the secondary molding die include:

[0019] Fasteners are used to connect the primary punch to the upper template, the primary die to the lower template, the secondary punch to the upper template, and the secondary die to the lower template. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of a one-piece molding die in its initial state.

[0021] Figure 2 A cross-sectional view of a one-piece molding die in its initial state;

[0022] Figure 3 Another cross-sectional view of a one-piece molding die in its initial state;

[0023] Figure 4 This is a three-dimensional structural diagram of the one-time molding mold after one-time molding;

[0024] Figure 5 This is a cross-sectional view of the primary molding die after the primary molding process.

[0025] Figure 6 This is a three-dimensional structural diagram of the secondary molding die in its initial state.

[0026] Figure 7 This is a three-dimensional structural diagram of the secondary molding mold after the secondary molding process.

[0027] In the diagram: 1. Upper template; 2. Guide sleeve; 3. Primary punch; 4. Primary die; 5. Primary mold cavity; 6. Lower template; 7. Positioning plate; 9. Guide post; 10. Sternal plate; 11. Fastener; 12. Polyurethane rubber; 13. Positioning pin; 14. Connecting post; 15. Guide hole; 16. Secondary punch; 17. Third positioning pin hole; 18. Secondary die; 19. Secondary mold cavity; 20. Movable mandrel. Detailed Implementation

[0028] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0029] In this document, terms such as "upper," "lower," "inner," and "outer" are established based on the positional relationships shown in the accompanying drawings. Depending on the drawings, the corresponding positional relationships may also change. Therefore, they should not be interpreted as an absolute limitation on the scope of protection. Moreover, relational terms such as "first" and "second" are only used to distinguish one component from another that has the same name, and do not necessarily require or imply any such actual relationship or order between these components.

[0030] Example

[0031] like Figure 1-5 As shown, a sternal plate 10 upper and lower claw forming mold includes: a primary forming mold; a secondary forming mold, both the primary forming mold and the secondary forming mold include an upper template 1 and a lower template 6; the primary forming mold further includes: a primary punch 3, the primary punch 3 is installed on the upper template 1; a primary die 4, the primary die 4 is installed on the lower template 6, the primary die 4 is provided with a primary mold cavity 5, the primary punch 3 is adapted to the primary mold cavity 5; a sternal plate 10, the sternal plate 10 is at least partially located between the primary mold cavity 5 and the primary punch 3, the sternal plate 10 is provided with a first positioning pin 13 hole; a positioning plate 7, the positioning plate 7 is placed in the primary mold cavity 5, the positioning plate 7 is provided with a second positioning pin 13 hole; a positioning pin 13, the positioning pin 13 is adapted to the first positioning pin 13 hole and the second positioning pin 13 hole; and a polyurethane rubber 12, the polyurethane rubber 12 is disposed in the primary die 4, the polyurethane rubber 12 abuts against the positioning plate 7.

[0032] Specifically, the upper and lower claws of the sternal plate 10 are formed using a primary molding die and a secondary molding die, respectively, reducing the forming difficulty of the upper and lower claws of the sternal plate 10 and facilitating the fixation of the sternal plate 10 during the forming process, thereby making the dimensions of the formed sternal plate more stable. During the primary molding process, the primary punch 3 is pressed into the primary mold cavity 5. Since the sternal plate 10 is located between the primary mold cavity 5 and the primary punch, the sternal plate 10 will bend during the pressing of the primary punch 3, thus forming the upper or lower claws. During the primary molding process, the positioning pin 13 connects the positioning plate 7 and the sternal plate 10 into a whole. Before and during the primary molding process, the polyurethane rubber 12 continuously holds the positioning plate 7 in place, preventing the sternal plate 10 from shifting and improving the dimensional stability of the formed sternal plate 10. The dimensions of the positioning plate 7 are matched with the primary mold cavity 5, and the primary mold cavity 5 guides the positioning plate 7. The primary die 4 is provided with a groove to accommodate the polyurethane rubber 12, which can deform under pressure during the primary molding process. Preferably, the positioning plate 7 is provided with a limiting groove to accommodate the sternal plate 10, which restricts the planar freedom of the sternal plate 10 and further improves the stability of the forming dimensions of the sternal plate 10.

[0033] Furthermore, both the primary molding die and the secondary molding die include: a guide sleeve 2, which is installed on the upper mold plate 1 and has a guide space inside; and a guide post 9, which is installed on the lower mold plate 6 and is adapted to the guide space. The cooperation between the guide sleeve 2 and the guide post 9 is used to limit the direction of movement of the upper mold, so that the direction of movement of the upper mold is fixed and the movement of the upper mold is more stable.

[0034] Furthermore, the one-piece molding die also includes: a connecting post 14, one end of which is connected to the positioning plate 7; and a guide hole 15, wherein the lower mold plate 6 is provided with a guide hole 15, and the other end of the connecting post 14 is movably disposed in the guide hole 15. The cooperation between the connecting post 14 and the guide hole 15 makes the movement of the positioning plate 7 more stable during the molding process. In detail, both the primary die 4 and the polyurethane rubber 12 are provided with through holes to accommodate the connecting post 14, and the connecting post 14 is threadedly connected to the positioning plate 7.

[0035] like Figure 6 , 7 As shown, the secondary forming mold further includes: a secondary punch 16, which is installed on the upper template 1; and a secondary die 18, which is installed on the lower template 6. The secondary die 18 is provided with a secondary mold cavity 19, and the secondary punch 16 is adapted to the secondary mold cavity 19. The principle of secondary forming is roughly the same as that of primary forming, that is, the sternal plate 10 is located between the secondary punch 16 and the secondary mold cavity 19. During the process of the secondary punch 16 being pressed into the secondary mold cavity 19, the upper and lower claws of the sternal plate 10 are formed.

[0036] Furthermore, the secondary forming mold also includes: a third positioning pin 13 hole, which is located in the secondary punch 16; and a movable mandrel 20, which is adapted to the third positioning pin 13 hole and the first positioning pin 13 hole. During the secondary forming process, the sternal plate 10 is fixed by the movable mandrel 20, making the forming of the sternal plate 10 more stable.

[0037] Furthermore, both the primary forming mold and the secondary forming mold include: fasteners 11, the primary punch 3 is connected to the upper template 1 via fasteners 11, the primary die 4 is connected to the lower template 6 via fasteners 11, the secondary punch 16 is connected to the upper template 1 via fasteners 11, and the secondary die 18 is connected to the lower template 6 via fasteners 11. The fasteners 11 are preferably screws.

[0038] The technical features described above can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

Claims

1. A sternal plate upper and lower jaw forming die characterized by, include: One-piece molding mold; The secondary forming mold, both the primary forming mold and the secondary forming mold include an upper template (1) and a lower template (6); The primary molding die further includes a primary punch (3), which is mounted on the upper template (1). A primary die (4) is installed on the lower template (6), the primary die (4) is provided with a primary mold cavity (5), and the primary punch (3) is adapted to the primary mold cavity (5); A sternal plate (10) is located at least partially between the primary mold cavity (5) and the primary punch (3), and the sternal plate (10) is provided with a first positioning pin hole; Positioning plate (7), the positioning plate (7) is placed in the primary mold cavity (5), and the positioning plate (7) is provided with a second positioning pin hole; Positioning pin (13), the positioning pin (13) is adapted to the first positioning pin hole and the second positioning pin hole; Polyurethane rubber (12) is disposed on the primary die (4) and abuts against the positioning plate (7).

2. The sternal plate upper and lower jaw forming die of claim 1 wherein, Both the primary molding die and the secondary molding die include: Guide sleeve (2), the guide sleeve (2) is installed on the upper template (1), and a guide space is provided inside the guide sleeve (2); Guide post (9), the guide post (9) is installed on the lower template (6), and the guide post (9) is adapted to the guide space.

3. The sternal plate upper and lower jaw forming die of claim 1 wherein, The one-piece molding die also includes: A connecting post (14), one end of which is connected to the positioning plate (7); Guide hole (15), the lower template (6) is provided with guide hole (15), and the other end of the connecting column (14) is movably provided in the guide hole (15).

4. The sternal plate upper and lower jaw forming die of claim 1 wherein, The secondary molding die includes: Secondary punch (16), which is installed on the upper template (1); A secondary die (18) is installed on the lower template (6). The secondary die (18) is provided with a secondary mold cavity (19). The secondary punch (16) is adapted to the secondary mold cavity (19).

5. The sternal plate upper and lower jaw forming die of claim 4 wherein, The secondary molding die also includes: The third positioning pin hole is provided in the secondary punch (16). Movable core rod (20), which is adapted to the third positioning pin hole and the first positioning pin hole.

6. The sternal plate upper and lower jaw forming die of claim 4 wherein, Both the primary molding die and the secondary molding die include: Fastener (11), the primary punch (3) is connected to the upper template (1) through the fastener (11), the primary die (4) is connected to the lower template (6) through the fastener (11), the secondary punch (16) is connected to the upper template (1) through the fastener (11), and the secondary die (18) is connected to the lower template (6) through the fastener (11).

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