Die for solving problem of overlarge resilience of R-angle forming

Abstract

The utility model discloses a die for solving the problem of overlarge R angle forming resilience. The die comprises a floating block, an upper die is arranged at the top end of the floating block, a die base is arranged at the bottom end of the floating block, a lower die is fixedly connected in the die base, the floating block is connected to the lower die in a sleeved mode, and a plurality of protruding ribs are evenly distributed on the upper surface of the lower die. According to the utility model, the convex ribs are additionally arranged on the lower mold, so that the product is locally pressed and deformed during molding, the stress is released, and the springback is reduced, the three-section demolding design of separating from the lower mold, separating from the upper mold and separating from the floating block is adopted, and the molding groove is matched with the upper mold, so that the shape of the product can be kept after one section of demolding; and the piston pushes the gas in the cavity, so that the gas is sprayed out from the air nozzle to blow the product, the product cooling is accelerated, the product is ensured not to rebound due to separation of the upper mold after the product is subjected to two-section demolding, and the product is ejected out by using the connecting rod linked with the floating block to realize three-section demolding, so that the product is convenient to discharge.

Description

Technical Field

[0001] This utility model relates to the field of mold technology, specifically to a mold for solving the problem of excessive springback during R-angle forming. Background Technology

[0002] In product design, the radius (R) of a product offers numerous advantages, such as reducing stress concentration, promoting plastic flow, facilitating demolding, and enhancing product strength. However, during the molding process of existing plastic products, the material deforms due to the constraints of the mold and the molding pressure. Once the product is demolded, these constraints suddenly disappear, releasing the internal stress of the material and resulting in excessive springback of the R. Furthermore, during demolding, as the product temperature gradually decreases, the springback phenomenon intensifies, ultimately making it difficult for the product's dimensions and functions to meet actual requirements. Therefore, a mold design is proposed to address the issue of excessive springback in R-corner molding. Utility Model Content

[0003] The purpose of this invention is to provide a mold for solving the problem of excessive springback in R-angle forming, thereby addressing the issues raised in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a mold for solving the problem of excessive springback during R-angle forming, comprising a float block, an upper mold at the top of the float block, a mold base at the bottom of the float block, a lower mold fixedly connected inside the mold base, and the float block sleeved on the lower mold, with multiple ribs evenly distributed on the upper surface of the lower mold, a receiving groove on the float block, a gear rotatably connected inside the receiving groove, a first rack meshing with one side of the gear and slidably connected to the float block, one end of the first rack fixedly connected to the mold base, and a second rack meshing with the other side of the gear and slidably connected to the float block, a cavity on the float block, a piston slidably connected inside the cavity and fixedly connected to the top of the second rack, and an air nozzle fixedly connected to the cavity.

[0005] Preferably, one side of the receiving groove is connected to a first guide hole, and the other side of the receiving groove is connected to a second guide hole. Both the first and second guide holes are opened on the float. The second guide hole is connected to the cavity. The first rack is slidably connected to the first guide hole, and the second rack is slidably connected to the second guide hole. A third guide hole is opened on the mold base at the position corresponding to the second guide hole, and the second rack is slidably connected to the third guide hole.

[0006] Preferably, the float has a forming groove, a first through groove is formed in the forming groove, and the lower mold is fitted into the first through groove.

[0007] Preferably, the cavity is provided with a second mounting groove, and the second mounting groove is conductively connected to the first through groove, and the jet nozzle is fixedly connected to the second mounting groove.

[0008] Preferably, a second through groove is provided on both inner walls of the first through groove.

[0009] Preferably, the float has multiple first mounting holes, and a guide rod is sleeved in the first mounting hole and the guide rod is fixedly connected to the mold base.

[0010] Preferably, the guide rod has a groove, a first wedge is installed in the groove, the first wedge is slidably connected in the first mounting hole, and a screw is installed on the first wedge, and the screw is threadedly connected to the guide rod.

[0011] Preferably, a first spring is sleeved on the guide rod, with one end of the first spring disposed in the first mounting hole and the other end disposed on the mold base.

[0012] Preferably, a first mounting groove is formed on the first mounting hole, a second mounting hole is formed on the first mounting groove, and the second mounting hole is conductively connected to the forming groove. A connecting rod is sleeved in the second mounting hole, a top block is fixedly connected to the top end of the connecting rod, a second wedge is fixedly connected to the bottom end of the connecting rod, and the second wedge is slidably connected in the second mounting hole. A second spring is sleeved on the connecting rod, and one end of the second spring is set on the second wedge, and the other end is set in the second mounting hole.

[0013] Preferably, a trapezoidal slider is slidably connected in the first mounting groove, with one end of the trapezoidal slider disposed on the second wedge and the other end disposed in the first mounting hole.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model adds ribs to the lower mold to make the product undergo localized strong pressure deformation during molding, thereby releasing stress and reducing springback. This utility model adopts a three-stage demolding design that separates from the lower mold, the upper mold, and the float. The molding groove, in conjunction with the upper mold, allows the product to maintain its shape after the first stage of demolding, avoiding springback due to cooling. Furthermore, the piston pushes the gas in the cavity, causing it to be ejected from the nozzle and blown onto the product, thereby accelerating the product's cooling. This ensures that the product will not spring back due to separation from the upper mold after the second stage of demolding. The connecting rod linked with the float pushes out the product to achieve the three-stage demolding, facilitating product unloading. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall three-dimensional cross-sectional structure of this utility model;

[0016] Figure 2 for Figure 1 Enlarged view of the structure of region A in the middle;

[0017] Figure 3 for Figure 1 Enlarged view of the structure of region B in the middle;

[0018] Figure 4 for Figure 1 Enlarged view of the structure of region C in the middle;

[0019] Figure 5 for Figure 1 Enlarged view of the structure of region D in the middle;

[0020] Figure 6 This is a schematic diagram of the three-dimensional cross-sectional structure of the floating block of this utility model.

[0021] In the diagram: 1. Float; 11. Forming groove; 12. First through groove; 13. Receiving groove; 14. First mounting hole; 15. First mounting groove; 16. Second mounting hole; 17. First guide hole; 18. Second guide hole; 19. Cavity; 110. Second mounting groove; 111. Gear; 112. First rack; 113. Second rack; 114. Piston; 115. Air nozzle; 116. Second through groove; 2. Mold base; 21. Third guide hole; 3. Upper mold; 4. Lower mold; 41. Rib; 5. Guide rod; 51. Groove; 52. First spring; 53. First wedge; 54. Screw; 6. Trapezoidal slider; 7. Connecting rod; 71. Top block; 72. Second wedge; 73. Second spring. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see the appendix Figure 1 -Appendix Figure 6This utility model provides an embodiment of a mold for solving the problem of excessive springback during R-angle forming. It includes a float block 1, an upper mold 3 at the top of the float block 1, and a mold base 2 at the bottom of the float block 1. A lower mold 4 is fixedly connected inside the mold base 2, and the float block 1 is sleeved on the lower mold 4. Multiple raised ribs 41 are evenly distributed on the upper surface of the lower mold 4. A receiving groove 13 is provided on the float block 1, and a gear 111 is rotatably connected inside the receiving groove 13. A first rack 112 is meshed with one side of the gear 111 and slidably connected to the float block 1. One end of the first rack 112 is fixedly connected to the mold base 2, and a second rack 113 is meshed with the other side of the gear 111 and slidably connected to the float block 1. A cavity is provided on the float block 1. The body 19 has a piston 114 slidably connected inside it, and the piston 114 is fixedly connected to the top of the second rack 113. A jet nozzle 115 is conductively fixed to the cavity 19. A float 1, an upper mold 3, and a lower mold 4 are used to form the product. A mold base 2 is used to install the lower mold 4. A raised rib 41 is used to locally compress and deform the product during forming, thereby releasing stress and reducing springback. A receiving groove 13 is used to install a gear 111. When the float 1 moves upward, the gear 111 rolls on the first rack 112, which can drive the second rack 113, causing the piston 114 on the second rack 113 to move upward in the cavity 19, thereby blowing the gas in the cavity 19 out through the jet nozzle 115 to cool the product. One side of the receiving groove 13 is conductively connected to the second rack 113. A guide hole 17 is provided, and a second guide hole 18 is connected to the other side of the receiving groove 13. Both the first guide hole 17 and the second guide hole 18 are provided on the float 1. The second guide hole 18 is connected to the cavity 19. The first rack 112 is slidably connected to the first guide hole 17, and the second rack 113 is slidably connected to the second guide hole 18. A third guide hole 21 is provided on the mold base 2 at the position corresponding to the second guide hole 18, and the second rack 113 is slidably connected to the third guide hole 21. The first guide hole 17 is used to receive the first rack 112, and the second guide hole 18 and the third guide hole 21 are used to receive the second rack 113. A forming groove 11 is provided on the float 1, and a first through groove 12 is provided in the forming groove 11. The lower mold 4 is sleeved on the float 1. Inside the first through groove 12, the forming groove 11 cooperates with the mold 3 to maintain the product shape and ensure that the product will not spring back and deform during demolding and cooling. The first through groove 12 is used to accommodate the lower mold 4. A second mounting groove 110 is opened on the cavity 19, and the second mounting groove 110 is conductively connected to the first through groove 12. The air nozzle 115 is fixedly connected to the second mounting groove 110, and the second mounting groove 110 is used to accommodate the air nozzle 115. A second through groove 116 is opened on both sides of the inner wall of the first through groove 12. The second through groove 116 is used for ventilation and cooling to accelerate product cooling. A plurality of first mounting holes 14 are opened on the float 1. A guide rod 5 is sleeved in the first mounting hole 14, and the guide rod 5 is fixedly connected to the mold base 2. The first mounting hole 14 is used to accommodate the guide rod 5.A groove 51 is provided on the guide rod 5, and a first wedge 53 is installed in the groove 51. The first wedge 53 is slidably connected to the first mounting hole 14. A screw 54 is installed on the first wedge 53 and threadedly connected to the guide rod 5. The groove 51 is used to accommodate the first wedge 53, and the screw 54 is used to fix the first wedge 53 in the groove 51. A first spring 52 is sleeved on the guide rod 5, and one end of the first spring 52 is set in the first mounting hole 14, and the other end is set on the mold base 2. The first spring 52 is used to provide elastic force for the float 1 to move upward. A first mounting groove 15 is provided on the first mounting hole 14, and a second mounting hole 16 is provided on the first mounting groove 15. The second mounting hole 16 is conductively connected to the forming groove 11. A connecting rod 7 is sleeved in the second mounting hole 16, and the top end of the connecting rod 7 is fixed. A top block 71 is connected to the connecting rod 7. A second wedge 72 is fixedly connected to the bottom end of the connecting rod 7, and the second wedge 72 is slidably connected within the second mounting hole 16. A second spring 73 is sleeved on the connecting rod 7, with one end of the second spring 73 positioned on the second wedge 72 and the other end positioned within the second mounting hole 16. The second mounting hole 16 accommodates the connecting rod 7, which connects the second wedge 72 and the top block 71. The top block 71 pushes the product away from the float 1. The second wedge 72 compresses the second spring 73, which provides a reset force to the second wedge 72, thus resetting the top block 71. A trapezoidal slider 6 is slidably connected within the first mounting groove 15, with one end of the trapezoidal slider 6 positioned on the second wedge 72 and the other end positioned within the first mounting hole 14. The trapezoidal slider 6 pushes the second wedge 72.

[0024] Working principle: When using this utility model, the product is formed through the float 1, upper mold 3, and lower mold 4. After the product is formed, the upper mold 3 moves upward. Under the elastic action of the first spring 52, the float 1 moves upward along the guide rod 5, causing the product to detach from the lower mold 4. At this time, the forming groove 11 cooperates with the upper mold 3 to maintain the product's shape, ensuring that the product will not spring back and deform during the demolding and cooling process. During the upward movement of the float 1, the gear 111 rolls on the first rack 112. The gear 111 can drive the second rack 113, causing the piston 114 on the second rack 113 to move upward in the cavity 19, thereby displacing the gas in the cavity 19. The product is cooled by air blowing out from the nozzle 115. Simultaneously, as the float 1 moves upward, the trapezoidal slider 6 also moves upward. After the float 1 reaches its limit position, the upper mold 3 disengages from the float 1, and the product leaves the upper mold 3. One end of the trapezoidal slider 6 is pressed by the first wedge 53, and the trapezoidal slider 6 slides along the first mounting groove 15. The other end of the trapezoidal slider 6 pushes the second wedge 72, which compresses the second spring 73. The second wedge 72 pushes the top block 71 via the connecting rod 7, and the top block 71 ejects the product from the forming groove 11, completing the product unloading. When the mold is closed again, the upper mold 3 will press down on the float 1 to reset it. The trapezoidal slider 6 will move down and disengage from the first wedge 53. Under the elastic action of the second spring 73, the second wedge 72 will also drive the top block 71 to reset via the connecting rod 7, and the second wedge 72 will also push the trapezoidal slider 6 to reset. Furthermore, the gear 111 will roll down along the first rack 112, thereby driving the second rack 113 to move down. The piston 114 on the second rack 113 moves down in the cavity 19, drawing external gas into the cavity 19 through the jet nozzle 115, waiting for the next ejection. Among them, the first guide hole 17 is used to accommodate the first rack 112, the second guide hole 18 is used to accommodate the second rack 113, and the first through groove 1 2 is used to accommodate the lower mold 4. The second through groove 116 is used to allow air circulation during product demolding and accelerate product cooling. The receiving groove 13 is used to install the gear 111. The first mounting hole 14 is used to accommodate the guide rod 5 and the first spring 52. The second mounting groove 110 is used to accommodate the air nozzle 115. The groove 51 is used to accommodate the first wedge 53. The screw 54 is used to fix the first wedge 53 in the groove 51. The second mounting hole 16 is used to accommodate the connecting rod 7 and the second spring 73. The mold base 2 is used to install the lower mold 4. The protruding rib 41 is used to allow local strong pressure deformation during product molding, thereby achieving stress release and reducing springback.

[0025] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A mold for solving the excessive springback of R-angle forming, comprising a float block (1), characterized in that: The upper end of the floating block (1) is provided with an upper mold (3), the bottom end of the floating block (1) is provided with a mold base (2), the mold base (2) is fixedly connected with a lower mold (4) in the mold base (2), and the floating block (1) is sleeved on the lower mold (4), a plurality of convex ribs (41) are uniformly distributed on the upper surface of the lower mold (4), a containing groove (13) is formed in the floating block (1), a gear (111) is rotatably connected in the containing groove (13), a first gear rack (112) is engagedly connected on one side of the gear (111), and the first gear rack (112) is slidably connected to the floating block (1), one end of the first gear rack (112) is fixedly connected to the mold base (2), a second gear rack (113) is engagedly connected on the other side of the gear (111), and the second gear rack (113) is slidably connected to the floating block (1), a cavity (19) is formed in the floating block (1), a piston (114) is slidably connected in the cavity (19), and the piston (114) is fixedly connected to the top end of the second gear rack (113), and a gas nozzle (115) is fixedly connected to the cavity (19).

2. A die for solving the problem of excessive springback in R-angle forming according to claim 1, characterized in that: One side of the containing groove (13) is connected with a first guide hole (17), the other side of the containing groove (13) is connected with a second guide hole (18), the first guide hole (17) and the second guide hole (18) are formed in the floating block (1), the second guide hole (18) is connected in the cavity (19), the first gear rack (112) is slidably connected in the first guide hole (17), the second gear rack (113) is slidably connected in the second guide hole (18), and a third guide hole (21) is formed in the mold base (2) at a position corresponding to the second guide hole (18), and the second gear rack (113) is slidably connected in the third guide hole (21).

3. A die for solving the problem of excessive springback in R-angle forming according to claim 1, characterized in that: A forming groove (11) is formed in the floating block (1), and a first through groove (12) is formed in the forming groove (11), and the lower mold (4) is sleeved in the first through groove (12).

4. A die for resolving excessive springback in R-angle forming according to claim 1, wherein: A second installation groove (110) is formed in the cavity (19), and the second installation groove (110) is connected in the first through groove (12), and the gas nozzle (115) is fixedly connected in the second installation groove (110).

5. A die for resolving excessive springback in R-angle forming according to claim 3, wherein: Second through grooves (116) are formed in the inner walls of the two sides of the first through groove (12).

6. A die for resolving excessive springback in R-angle forming according to claim 3, wherein: A plurality of first installation holes (14) are formed in the floating block (1), guide rods (5) are sleeved in the first installation holes (14), and the guide rods (5) are fixedly connected to the mold base (2).

7. A die for resolving excessive springback in R-angle forming according to claim 6, wherein: A recess (51) is formed in the guide rod (5), a first wedge block (53) is mounted in the recess (51), the first wedge block (53) is slidably connected in the first installation hole (14), a screw (54) is mounted on the first wedge block (53), and the screw (54) is threadedly connected to the guide rod (5).

8. A die for resolving excessive springback in R-angle forming according to claim 7, wherein: A first spring (52) is sleeved on the guide rod (5), one end of the first spring (52) is arranged in the first installation hole (14), and the other end of the first spring (52) is arranged on the mold base (2).

9. A die for resolving excessive springback in R-angle forming according to claim 8, wherein: The first mounting hole (14) is provided with a first mounting groove (15), the first mounting groove (15) is provided with a second mounting hole (16), the second mounting hole (16) is connected in the forming groove (11) in a lead-through mode, the second mounting hole (16) is sleeved with a connecting rod (7), the top end of the connecting rod (7) is fixedly connected with a top block (71), the bottom end of the connecting rod (7) is fixedly connected with a second wedge block (72), the second wedge block (72) is slidably connected in the second mounting hole (16), the connecting rod (7) is sleeved with a second spring (73), one end of the second spring (73) is arranged on the second wedge block (72), and the other end is arranged in the second mounting hole (16).

10. A die for resolving excessive springback in R-angle forming according to claim 9, wherein: The first mounting groove (15) is slidably connected with a trapezoidal sliding block (6), one end of the trapezoidal sliding block (6) is arranged on the second wedge block (72), and the other end is arranged in the first mounting hole (14).

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