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

Abstract

The invention 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 into the die base, the floating block is connected to the lower die in a sleeving mode, and a plurality of convex ribs are evenly distributed on the upper surface of the lower die; 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 resilience 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 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] The invention relates to the technical field of molds, in particular to a mold for solving the problem of excessive springback of R-angle forming. Background Art

[0002] In the field of product design, the R angle of a product has many advantages, such as reducing stress concentration, promoting plastic flow, facilitating demolding, and improving product strength. However, when existing plastic products are being molded, the material will deform due to the constraints of the mold and the molding pressure. Once the product is demolded, these constraints will suddenly disappear, and the stress inside the material will be released, causing the R angle to rebound too much. In addition, during the demolding process, as the temperature of the product gradually decreases, the R angle rebound phenomenon will be further aggravated, and ultimately the size and function of the product will be difficult to meet actual needs. Therefore, a mold for solving the problem of excessive R angle molding rebound is proposed. Summary of the invention

[0003] The purpose of the present invention is to provide a die for solving the problem of excessive springback in R-angle forming, so as to solve the problem raised in the above-mentioned background technology.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a mold for solving the problem of excessive springback of R-angle forming, comprising a floating block, an upper mold is arranged on the top of the floating block, a mold seat is arranged on the bottom of the floating block, a lower mold is fixedly connected in the mold seat, and the floating block is sleeved on the lower mold, and a plurality of convex ribs are evenly distributed on the upper surface of the lower mold, a receiving groove is provided on the floating block, a gear is rotatably connected in the receiving groove, a first rack is meshedly connected on one side of the gear, and the first rack is slidably connected to the floating block, one end of the first rack is fixedly connected to the mold seat, and a second rack is meshedly connected on the other side of the gear, and the second rack is slidably connected to the floating block, a cavity is provided on the floating block, a piston is slidably connected in the cavity, and the piston is fixedly connected to the top of the second rack, and an air nozzle is connected and fixed on the cavity.

[0005] Preferably, one side of the accommodating groove is conductively connected to a first guide hole, the other side of the accommodating groove is conductively connected to a second guide hole, and the first guide hole and the second guide hole are both opened on the floating block, the second guide hole is conductively connected in the cavity, the first rack is slidably connected in the first guide hole, the second rack is slidably connected in the second guide hole, and a third guide hole is opened at a position on the mold base corresponding to the second guide hole, and the second rack is slidably connected in the third guide hole.

[0006] Preferably, a forming groove is provided on the floating block, a first through groove is provided in the forming groove, and the lower mold is sleeved in the first through groove.

[0007] Preferably, a second mounting groove is opened on the cavity, and the second mounting groove is conductively connected to the first through groove, and the air nozzle is fixedly connected to the second mounting groove.

[0008] Preferably, second through grooves are formed on both inner walls of the first through groove.

[0009] Preferably, a plurality of first mounting holes are formed on the floating block, guide rods are sleeved in the first mounting holes, and the guide rods are fixedly connected to the mold base.

[0010] Preferably, a groove is provided on the guide rod, a first wedge is installed in the groove, and the first wedge is slidably connected to the first mounting hole, 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, and one end of the first spring is arranged in the first mounting hole, and the other end of the first spring is arranged on the mold base.

[0012] Preferably, a first mounting hole is provided with a first mounting groove, a second mounting hole is provided 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 block is fixedly connected to the bottom end of the connecting rod, and the second wedge block is slidably connected to the second mounting hole, a second spring is sleeved on the connecting rod, and one end of the second spring is arranged on the second wedge block, and the other end is arranged in the second mounting hole.

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

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention adds convex ribs to the lower mold to locally deform the product during molding, thereby achieving stress release, thereby reducing springback. The present invention adopts a three-stage demoulding design of detaching from the lower mold, detaching from the upper mold and detaching from the floating block. The molding groove is used in conjunction with the upper mold to allow the product to maintain its shape after one stage of demoulding, thereby avoiding springback due to cooling. The gas in the cavity is pushed by the piston to be sprayed out from the air nozzle to blow the product, thereby accelerating the cooling of the product, thereby ensuring that the product will not rebound due to the separation of the upper mold after the second stage of demoulding. The connecting rod linked to the floating block is used to eject the product to achieve three-stage demoulding for product unloading. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall three-dimensional cutaway structure of the present invention;

[0016] Figure 2 for Figure 1 A magnified view of the structure in the middle A area;

[0017] Figure 3 for Figure 1 A magnified view of the structure in the middle B area;

[0018] Figure 4 for Figure 1 A magnified view of the structure of the middle C region;

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

[0020] Figure 6 It is a schematic diagram of the three-dimensional cross-section structure of the floating block of the present invention.

[0021] In the figure: 1, floating block; 11, forming groove; 12, first through groove; 13, accommodating 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 seat; 21, third guide hole; 3, upper mold; 4, lower mold; 41, convex rib; 5, guide rod; 51, groove; 52, first spring; 53, first wedge block; 54, screw; 6, trapezoidal slider; 7, connecting rod; 71, top block; 72, second wedge block; 73, second spring. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] Please refer to the attached Figure 1 -Attached Figure 6An embodiment of the present invention is as follows: a mold for solving the problem of excessive springback of R-angle forming, comprising a floating block 1, an upper mold 3 is arranged at the top of the floating block 1, a mold seat 2 is arranged at the bottom of the floating block 1, a lower mold 4 is fixedly connected in the mold seat 2, and the floating block 1 is sleeved on the lower mold 4, and a plurality of convex ribs 41 are evenly distributed on the upper surface of the lower mold 4, a receiving groove 13 is provided on the floating block 1, a gear 111 is rotatably connected in the receiving groove 13, one side of the gear 111 is meshedly connected with a first rack 112, and the first rack 112 is slidably connected to the floating block 1, one end of the first rack 112 is fixedly connected to the mold seat 2, the other side of the gear 111 is meshedly connected with a second rack 113, and the second rack 113 is slidably connected to the floating block 1, and a cavity 1 is provided on the floating block 1 9, a piston 114 is slidably connected in the cavity 19, and the piston 114 is fixedly connected to the top of the second rack 113, and an air nozzle 115 is connected and fixed on the cavity 19, the floating block 1, the upper mold 3 and the lower mold 4 are used to realize the molding of the product, the mold seat 2 is used to install the lower mold 4, and the convex rib 41 is used to make the product deform locally during molding, so as to realize stress release, thereby reducing rebound, and the receiving groove 13 is used to install the gear 111. When the floating block 1 moves up, the gear 111 rolls on the first rack 112, which can drive the second rack 113, so that the piston 114 on the second rack 113 moves up in the cavity 19, so as to blow the gas in the cavity 19 out from the air nozzle 115 to cool the product; one side of the receiving groove 13 is connected to the first The guide hole 17 is connected to the second guide hole 18 on the other side of the accommodating groove 13, and the first guide hole 17 and the second guide hole 18 are both opened on the floating block 1, and 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 opened at a position corresponding to the second guide hole 18 on the mold base 2, and the second rack 113 is slidably connected to the third guide hole 21, the first guide hole 17 is used to accommodate the first rack 112, and the second guide hole 18 and the third guide hole 21 are used to accommodate the second rack 113; a molding groove 11 is opened on the floating block 1, and a first through groove 12 is opened in the molding groove 11, and the lower mold 4 is sleeved on the first through groove 12. In a through groove 12, the molding groove 11 cooperates with the upper mold 3 to maintain the shape of the product, ensuring that the product will not rebound and deform during the demolding and cooling process. The first through groove 12 is used to accommodate the lower mold 4; a second mounting groove 110 is provided on the cavity 19, and the second mounting groove 110 is conductively connected to the first through groove 12, and 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; second through grooves 116 are provided on the inner walls of both sides of the first through groove 12, and the second through grooves 116 are used for ventilation and cooling to accelerate the cooling of the product; a plurality of first mounting holes 14 are provided on the floating block 1, and 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, and 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 block 53 is installed in the groove 51, and the first wedge block 53 is slidably connected to the first mounting hole 14, a screw 54 is installed on the first wedge block 53, and the screw 54 is threadedly connected to the guide rod 5, the groove 51 is used to accommodate the first wedge block 53, and the screw 54 is used to fix the first wedge block 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 arranged in the first mounting hole 14, and the other end is arranged on the mold seat 2, and the first spring 52 is used to provide elastic force for the floating block 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, and the second mounting hole 16 is conductively connected to the molding groove 11, and 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, a second wedge block 72 is fixedly connected to the bottom end of the connecting rod 7, and the second wedge block 72 is slidably connected to the second mounting hole 16. A second spring 73 is sleeved on the connecting rod 7, and 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. The second mounting hole 16 is used to accommodate the connecting rod 7, and the connecting rod 7 is used to connect the second wedge block 72 and the top block 71. The top block 71 is used to push the product off the floating block 1, and the second wedge block 72 is used to compress the second spring 73. The second spring 73 is used to provide a reset elastic force for the second wedge block 72 to achieve the reset of the top block 71; a trapezoidal slider 6 is slidably connected in the first mounting groove 15, and one end of the trapezoidal slider 6 is arranged on the second wedge block 72, and the other end is arranged in the first mounting hole 14. The trapezoidal slider 6 is used to push the second wedge block 72. ;

[0024] Working principle: When using the present invention, the product is formed by the floating block 1, the upper mold 3 and the lower mold 4. After the product is formed, the upper mold 3 moves up. Under the elastic action of the first spring 52, the floating block 1 moves up along the guide rod 5, so that the product is separated from the lower mold 4. At this time, the molding groove 11 cooperates with the upper mold 3 to maintain the product shape, ensuring that the product will not rebound and deform during the demolding and cooling process. During the upward movement of the floating block 1, the gear 111 rolls on the first rack 112, and the gear 111 can drive the second rack 113, so that the piston 114 on the second rack 113 moves up in the cavity 19, thereby the gas in the cavity 19 is released. The air is blown out from the air nozzle 115 to cool the product. At the same time, during the upward movement of the floating block 1, the trapezoidal slider 6 also moves upward. After the floating block 1 moves to the limit position, the upper mold 3 that moves upward is separated from the floating block 1, and the product is separated from the upper mold 3. One end of the trapezoidal slider 6 is squeezed by the first wedge block 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 block 72, and the second wedge block 72 compresses the second spring 73. The second wedge block 72 pushes the ejector block 71 through the connecting rod 7, and the ejector block 71 ejects the product out of the molding groove 11, completing the unloading of the product. When the mold is closed again, the upper mold 3 will press the floating block 1 downward to reset. The trapezoidal slider 6 will move downward and disengage from the first wedge block 53. Under the elastic action of the second spring 73, the second wedge block 72 will also drive the top block 71 to return to its original position through the connecting rod 7, and the second wedge block 72 will also push the trapezoidal slider 6 to return to its original position. In addition, the gear 111 will roll downward along the first rack 112, thereby driving the second rack 113 to move downward, and the piston 114 on the second rack 113 will move downward in the cavity 19, sucking the external gas into the cavity 19 through the air 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 achieve air circulation during the demoulding process of the product to accelerate the cooling of the product, the accommodating 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 block 53, the screw 54 is used to fix the first wedge block 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, and the convex rib 41 is used to allow the product to be locally deformed by strong pressure during molding, thereby achieving stress release, thereby reducing rebound.

[0025] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

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

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

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

4. A mold for solving the problem of excessive springback of R-angle forming according to claim 1, characterized in that: The cavity (19) is provided with a second installation groove (110), and the second installation groove (110) is conductively connected to the first through groove (12), and the air nozzle (115) is fixedly connected to the second installation groove (110).

5. A mold for solving the problem of excessive springback of R-angle forming according to claim 3, characterized in that: Second through grooves (116) are provided on both inner walls of the first through groove (12).

6. A die for solving the problem of excessive springback in R-angle forming according to claim 3, characterized in that: The floating block (1) is provided with a plurality of first mounting holes (14), the first mounting holes (14) are sleeved with guide rods (5), and the guide rods (5) are fixedly connected to the mold base (2).

7. A die for solving the problem of excessive springback in R-angle forming according to claim 6, characterized in that: The guide rod (5) is provided with a groove (51), a first wedge block (53) is installed in the groove (51), and the first wedge block (53) is slidably connected to the first installation hole (14), a screw (54) is installed on the first wedge block (53), and the screw (54) is threadedly connected to the guide rod (5).

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

9. A die for solving the problem of excessive springback in R-angle forming according to claim 8, characterized in that: 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), and the second mounting hole (16) is conductively connected to the molding groove (11), a connecting rod (7) is sleeved in the second mounting hole (16), a top block (71) is fixedly connected to the top end of the connecting rod (7), a second wedge block (72) is fixedly connected to the bottom end of the connecting rod (7), and the second wedge block (72) is slidably connected to the second mounting hole (16), a second spring (73) is sleeved on the connecting rod (7), 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 solving the problem of excessive springback in R-angle forming according to claim 9, characterized in that: A trapezoidal slider (6) is slidably connected in the first mounting groove (15), and one end of the trapezoidal slider (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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