In-mold double-point flap forming mechanism

Abstract

The application provides a double-point in-mold flap forming mechanism, which comprises an in-mold assembly, a flap assembly, an upper mold punch and an upper mold profiling part, the in-mold assembly comprises a lower mold base, a limiting fixed block one, a limiting fixed block two and a lower mold forming part, the flap assembly comprises a lower mold force transmission rod and a lower mold flap, the upper mold punch is located above the lower mold base and corresponds to the lower mold force transmission rod, and the upper mold profiling part is located above the lower mold base and is provided with a profiling structure on the bottom surface. Through the ingenious arrangement of the limiting fixed block one, the limiting fixed block two and the upper mold profiling part, the application realizes accurate three-direction freedom positioning of the product; and through the flap assembly, the lower mold forming part is driven to move upward to realize the upward overturning of the lower sidewall or the lower part of the product, so that bending forming is realized.

Description

Technical Field

[0001] This application belongs to the field of terminal production technology, specifically relating to an in-mold double-point rocker forming mechanism. Background Technology

[0002] In certain special molding scenarios, some products require bending from bottom to top on one side, with pre-setting limits on the top and left / right sides to create a time difference. Specifically, in the initial state, a portion of the workpiece is open outwards and has already undergone a bend approaching 90°. The final state involves connecting this portion of the workpiece to another side or edge, where the bend, initially approaching 90°, is further shaped to 90° or 120°. Based on these reasons, an in-mold double-point rocker forming mechanism was developed. Summary of the Invention

[0003] This application provides an in-mold double-point rocker forming mechanism that can fold upwards (or outwards) from below (or inside) the workpiece to achieve bending forming.

[0004] The technical solution adopted in this application is as follows: The in-mold dual-point rocker forming mechanism includes an in-mold assembly, a rocker assembly, an upper die punch, and an upper imitation forming part. The in-mold assembly includes a lower mold base, a first limiting and fixing block, a second limiting and fixing block, and a lower mold forming part. The first limiting and fixing block and the second limiting and fixing block are located inside the lower mold base, and an L-shaped limiting area is formed between them. The vertical area of ​​the L-shaped limiting area extends upward, and the upper part of the vertical area is the forming positioning area. The lower mold forming part is an L-shaped block that is movably located in the L-shaped limiting area and can slide up and down. The high end of the lower mold forming part is located in the vertical area of ​​the L-shaped limiting area, and a return spring is provided between the top of its low end and the second limiting and fixing block. The rocker assembly includes a lower die force transmission rod and a lower die rocker. The lower die force transmission rod is vertically slidably disposed inside the limiting and fixing block. The lower die rocker is rotatably disposed in a lower cavity below the limiting and fixing block via a shaft. One of its top ends abuts against the lower die forming part extending into the lower cavity of the limiting and fixing block, causing the other end to rock up. The other top end of the rocker contacts the lower end of the lower die force transmission rod. The upper die punch is located above the lower die base and corresponds to the lower die force transmission rod. The upper imitation forming part is located above the lower die base, and its bottom surface is provided with an imitation structure.

[0005] Preferably, the first limiting and fixing block is an L-shaped block, and the second limiting and fixing block is an inverted L-shaped block that cooperates with it; the lower part of the first limiting and fixing block has a cavity that runs through its left and right sides and bottom, the top surface of its lower end is open and connected to the cavity, and the upper end has a through hole that runs through it and connects to the cavity; the lower mold forming part extends into the cavity under the action of the return spring and abuts against the top of one end of the lower mold seesaw, so that the other end of the lower mold seesaw is raised, and the lower mold force transmission rod is slidably set in the through hole, and its lower end is in contact with the top of the other end of the lower mold seesaw.

[0006] Preferably, the lower part of the inner wall of the through hole is provided with a limiting groove that communicates with the cavity, and the lower end of the lower mold force transmission rod has a limiting part that cooperates with the limiting groove.

[0007] Preferably, the lower mold seesaw is made of an elongated oval block and a C-shaped block in one piece. The C-shaped block and the elongated oval block are opened relative to each other and connected in an arc shape. The shaft is set at the end of the elongated oval block near the C-shaped block.

[0008] Preferably, the lower end of the molded part is provided with a first groove, the reset spring is vertically arranged in the first groove, and the other end extends out of the first groove and is fixed to the inner side of the limiting and fixing block two.

[0009] Preferably, a vertical through groove is provided at the top of the lower mold base, penetrating its upper and lower surfaces, and an L-shaped clearance area is provided behind the vertical through groove, penetrating its left, right and rear sides. Limiting and fixing blocks one and two are located in the vertical through groove. A clearance groove one is provided at the top left end of the limiting and fixing block one, penetrating its front and rear sides, and a clearance groove two is provided at the top right side of the limiting and fixing block two, penetrating its front and rear sides.

[0010] Compared with the prior art, the beneficial effects of this application are as follows: This application achieves precise three-dimensional positioning of the product through the ingenious arrangement of limiting and fixing block one, limiting and fixing block two, and upper imitation shaping parts; then, through the rocker assembly, the lower mold forming parts are driven to move upward to achieve the upward flipping of the lower wall or lower part of the product, thereby realizing bending and forming. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure in the modular state of this application.

[0012] Figure 2 This is a schematic diagram of the structure in the mold-closed state of this application.

[0013] Figure 3 This is an exploded view of the in-mold components.

[0014] Figure 4 This is a top view of the in-mold components.

[0015] In the diagram: 1. Upper die punch; 2. Upper die forming part; 3. Lower die base; 4. Limiting and fixing block one; 5. Lower die force transmission rod; 6. Lower die seesaw; 7. Shaft; 8. Lower die forming part; 9. Return spring; 10. Limiting and fixing block two; 11. Forming positioning area; 12. First groove; 13. Vertical through groove; 14. L-shaped clearance area; 15. Clearance through groove one; 16. Clearance through groove two; 41. Cavity; 42. Through hole; 43. Limiting groove; 51. Limiting part; 61. Oblong plate; 62. C-shaped plate. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of this application clearer, the following description, in conjunction with specific embodiments, further clarifies this application. The accompanying drawings are for illustrative purposes only, representing schematic diagrams rather than actual physical objects, and should not be construed as limiting the scope of this patent. It is understandable that some well-known structures and their descriptions may be omitted in the drawings for those skilled in the art.

[0017] The in-mold double-point rocker forming mechanism provided in this application is designed to solve special forming scenarios. It primarily addresses the issue of some products requiring an upward bend on one side, with the top and left / right sides needing to be pre-limited to create a time difference. The rocker structure of the lower mold perfectly solves this problem. In the initial state, as this application demonstrates, the top and left / right sides of the product are already formed, and the lower side plate or edge of the workpiece opens downwards, already exhibiting a bend approaching 90°. This application completes the final state of the product by pushing the lower side edge or lower side plate upwards to align with the product's side. At this point, the bend approaching 90° moves upwards to further form a 90° or 120° bend. The most crucial point in the forming process is that this 90° or 120° bend is an upward (or outward) fold from the bottom (or inside) of the workpiece, representing an atypical bending direction.

[0018] according to Figure 1The schematic diagram of the mold opening state shows an in-mold double-point rocker forming mechanism, including an in-mold component, a rocker component, an upper mold punch 1, and an upper mold forming part 2. The in-mold component includes a lower mold base 3, a first limiting block 4, a second limiting block 10, and a lower mold forming part 8. The first limiting block 4 and the second limiting block 10 are located inside the lower mold base 3, and an L-shaped limiting area is formed between them. The vertical area of ​​the L-shaped limiting area extends upward, and the upper part of the vertical area is the forming positioning area 11. The lower mold forming part 8 is an L-shaped block that is movably located in the L-shaped limiting area and can slide up and down. The high end of the lower mold forming part 8 is located in the vertical area of ​​the L-shaped limiting area, and a return spring 9 is provided between its low end and the second limiting block 10. Under the action of the return spring 9, the lower mold forming part 7 can naturally extend into the lower cavity of the corresponding first limiting block 4. Among them, the inner shape and width of the molding positioning area formed by limiting and fixing block one and limiting and fixing block two are adapted to the two side walls of the product, so as to facilitate the product to enter and achieve the limiting on both sides.

[0019] The rocker assembly includes a lower die force transmission rod 5 and a lower die rocker 6. The lower die force transmission rod 5 is vertically slidably disposed inside the limiting and fixing block 4. The lower die rocker 6 is rotatably disposed in the lower cavity of the limiting and fixing block 4 via a shaft 7. One of its top ends abuts against the lower die forming part 8 that extends into the lower cavity of the limiting and fixing block, causing the other end to rock up. The other top end of the rocker 6 contacts the lower end of the lower die force transmission rod 5. The upper die punch 1 is located above the lower die base 3, and its lower end corresponds to the lower die force transmission rod 5. The upper imitation forming part 2 is located above the lower die base 3, and its bottom surface is provided with an imitation structure. This imitation structure is adapted to the top of the product, which facilitates contact with the product to achieve positioning.

[0020] Furthermore, since this application mainly addresses the problem of products needing to bend from bottom to top on one side, but the top and left and right sides of different products may have different shapes, and the shape, width and contour structure of the two inner sides of the forming positioning area need to be adapted to the product shape, no specific details are specified.

[0021] like Figure 2 The diagram showing the mold closing state illustrates that, during application, under the action of the product material strip, the product is initially positioned in the positioning and forming area 11 and suspended below. At this time, it is limited to the left and right by the first limiting block 4 and the second limiting block 10. The upper imitation shaping part 2 moves downward, and its bottom imitation structure first contacts the top of the product, achieving preliminary and accurate positioning. At this time, the product is limited from three directions by the upper imitation shaping part 2, the first limiting block 4, and the second limiting block 10. The upper mold punch 1 moves downward, contacts and presses down the lower mold force transmission rod 5. The lower mold force transmission rod 1 presses down, causing the lower mold seesaw 6 to rotate around the axis 7, causing the other end to lift up and push the lower mold forming part 8 to move upward. This causes the high end of the lower mold forming part 8 to lift the "lower side wall" of the product upward, so that it connects with the side. The bend on the lower side wall, which tends to be 90°, is further formed to 90° or 120°.

[0022] In this embodiment, the L-shaped limiting area is configured as follows: the limiting fixing block 1 4 is an L-shaped block, and the limiting fixing block 2 10 is an inverted L-shaped block that cooperates with it; the lower part of the limiting fixing block 1 4 has a cavity 41 that runs through its left and right sides and bottom to accommodate the lower mold rocker plate; the opening on the lower top surface of the limiting fixing block 1 4 is connected to the cavity, and the upper part has a through hole 42 that is connected to the cavity; the lower mold forming part 8 extends into the cavity 41 under the action of the return spring 9 and abuts against the top of one end of the lower mold rocker plate 6, applying pressure to make the other end of the lower mold rocker plate 6 rock up; the lower mold force transmission rod 5 is slidably disposed in the through hole 42, and its lower end is in contact with the top of the other end of the lower mold rocker plate 6.

[0023] To prevent the lower die force transmission rod from popping upward, a limiting groove 43 communicating with the cavity 41 is provided on the lower part of the inner wall of the through hole 42, and the lower end of the lower die force transmission rod 5 has a limiting part 51 that cooperates with the limiting groove 43.

[0024] In this embodiment, the lower mold seesaw 6 is integrally made of an oblong plate 61 and a C-shaped plate 62. The C-shaped plate 62 and the oblong plate 61 are relatively open and connected in an arc shape. The shaft 7 is set at one end of the oblong plate 61 near the C-shaped plate 62.

[0025] Furthermore, the reset spring is arranged such that a first groove 12 is provided at the top of the lower end of the lower mold forming part 8, and the reset spring 9 is vertically arranged in the first groove 12, with the other end extending out of the first groove 12 and fixed to the inner side of the limiting fixing block 2 10.

[0026] It is known that stamping dies include an upper die portion and a lower die portion, but the upper die portion and lower die portion are constructed differently in different stamping dies. In the application of this application, the in-die components and the rocker assembly are located within the lower die plate, and the upper die punch and the upper die forming part are respectively set in different positions of the upper die portion, which are not specifically limited according to the different arrangements of the stamping die.

[0027] Because in application, the in-mold components and rocker assembly are arranged in the lower die section of the stamping die, and the product strip follows... Figure 1 , Figure 2 As shown in the horizontal arrangement, the material guide channel is located in front of or behind the mechanism. During the mold closing process, other feeding mechanisms push this mechanism closer to the product material guide channel, or push the product strip to this mechanism to achieve stamping and forming. Then, the upper molded part and the upper die punch move down one after another to complete the upward bending action. After the upper die punch and the upper molded part return, this mechanism or the product strip also returns to its original position without affecting the movement of the product strip.

[0028] Based on considerations for later arrangements, further, such as Figure 3As shown, a vertical through-slot 13 is provided at the top of the lower mold base 3, penetrating its upper and lower surfaces. An L-shaped clearance area 14 is provided behind the vertical through-slot 13, penetrating its left, right, and rear sides. Limiting and fixing blocks 1-4 and 2-10 are located within the vertical through-slot 13, with their tops flush. A clearance through-slot 15 is provided at the top left end of the top of the limiting and fixing block 1-4, penetrating its front and rear sides. A clearance through-slot 2 16 is provided at the top right end of the top of the limiting and fixing block 2-10, penetrating its front and rear sides. Clearance through-slot 1, the positioning and forming area, and clearance through-slot 2 correspond to three adjacent products on the product strip. Clearance through-slot 1 is the positioning area before product forming, and clearance through-slot 2 is the positioning area after product forming. During mold closing, this mechanism is first pushed close to the product guide channel by other feeding mechanisms, causing the three adjacent products on the product strip to enter clearance through-slot 1, the positioning and forming area, and clearance through-slot 2 respectively, achieving initial positioning; then, the mold closing and stamping operation is performed.

[0029] The specific molding process of the double-point rocker molding mechanism in this mold is as follows: (1) First stage: mold closing Initial positioning: After the product enters the positioning and forming area, the middle template drives the upper imitation part 2 to move downward. The imitation structure on the bottom surface of the forming imitation part 2 first contacts the product, achieving preliminary and accurate positioning. Closure and Full Positioning: The mold continues to close, with the middle and lower mold plates completely closed. At this point, the product is firmly restrained from three directions by the upper imitation part 2, the limiting and fixing block 1 4, and the limiting and fixing block 2 10, achieving precise three-dimensional positioning. This provides a solid foundation for subsequent bending. The "lower die seesaw" drives a 90° bend: The die continues to close, and the upper die punch 1, fixed to the upper die plate, begins to contact and press down the lower die force transmission rod 5. The force transmission rod 5 transmits the downward force to the lower die seesaw 6. The lower die seesaw 6 rotates around the axis 7, and its other end tilts upward, pushing the lower die forming part 8 to move upward. This upward movement directly lifts the "lower sidewall" of the product, making it align with the side of the product. The bend on the lower sidewall, which tends to be 90°, is further formed to 90° or 120°.

[0030] (2) Second stage: mold opening and full reset Release and unloading: The middle mold and the lower mold separate; the upper mold forming part 2 disengages, and the lower mold forming part 8 retracts under the action of the return spring 9, releasing the pressure on the product; at the same time, the upper mold forming part 2 moves upward, and the product positioning is relaxed; Mechanism reset: After forming is completed, the mold begins to open; the upper mold punch 1 retracts, and the lower mold force transmission rod 5 retracts to its initial position. Since the upper mold punch 1 no longer presses down on the force transmission rod 5, the lower mold seesaw 6 resets under its own weight and the force of the lower mold forming part reset spring, and the lower mold forming part 8 descends and separates from the already formed 90° lower wall; Release and unloading: The middle mold and the lower mold separate; the upper mold forming part 2 disengages, and at the same time, the lower mold forming part 8 retracts under the action of the return spring 9, releasing the pressure on the product; the upper mold forming part 2 moves upward, and the product positioning is relaxed.

Claims

1. An in-mold double-point rocker forming mechanism, comprising an in-mold assembly, a rocker assembly, an upper die punch, and an upper imitation forming part, characterized in that: The in-mold assembly includes a lower mold base, a first limiting and fixing block, a second limiting and fixing block, and a lower mold forming part. The first limiting and fixing block and the second limiting and fixing block are located inside the lower mold base, and an L-shaped limiting area is formed between them. The vertical area of ​​the L-shaped limiting area extends upward, and the upper part of the vertical area is the forming positioning area. The lower mold forming part is an L-shaped block that is movably located in the L-shaped limiting area and can slide up and down. The high end of the lower mold forming part is located in the vertical area of ​​the L-shaped limiting area, and a return spring is provided between the top of its low end and the second limiting and fixing block. The rocker assembly includes a lower die force transmission rod and a lower die rocker. The lower die force transmission rod is vertically slidably disposed inside the limiting and fixing block. The lower die rocker is rotatably disposed in a lower cavity below the limiting and fixing block via a shaft. One of its top ends abuts against the lower die forming part extending into the lower cavity of the limiting and fixing block, causing the other end to rock up. The other top end of the rocker contacts the lower end of the lower die force transmission rod. The upper die punch is located above the lower die base and corresponds to the lower die force transmission rod. The upper imitation forming part is located above the lower die base, and its bottom surface is provided with an imitation structure.

2. The in-mold double-point rocker forming mechanism according to claim 1, characterized in that: Limiting and fixing block one is an L-shaped block, and limiting and fixing block two is an inverted L-shaped block that cooperates with it; the lower part of limiting and fixing block one has a cavity that runs through its left and right sides and bottom, the top surface of its lower end is open and connected to the cavity, and the upper end has a through hole that runs through it and connects to the cavity; the lower mold forming part extends into the cavity under the action of the return spring and abuts against the top of one end of the lower mold seesaw, causing the other end of the lower mold seesaw to lift up, and the lower mold force transmission rod is slidably set in the through hole, with its lower end contacting the top of the other end of the lower mold seesaw.

3. The in-mold double-point rocker forming mechanism according to claim 2, characterized in that: The lower part of the inner wall of the through hole is provided with a limiting groove that communicates with the cavity, and the lower end of the lower mold force transmission rod has a limiting part that cooperates with the limiting groove.

4. The in-mold double-point rocker forming mechanism according to claim 1, characterized in that: The lower mold seesaw is made of an elongated oval plate and a C-shaped plate. The C-shaped plate and the elongated oval plate are opened relative to each other and connected in an arc shape. The shaft is set at the end of the elongated oval plate near the C-shaped plate.

5. The in-mold double-point rocker forming mechanism according to claim 1, characterized in that: The lower end of the molded part is provided with a first groove, and a reset spring is vertically arranged in the first groove, with the other end extending out of the first groove and fixed to the inner side of the limiting and fixing block two.

6. The in-mold double-point rocker forming mechanism according to claim 1, characterized in that: A vertical through groove is provided at the top of the lower mold base, and an L-shaped clearance area is provided behind the vertical through groove, which extends through the left, right and rear sides. Limiting and fixing blocks one and two are located in the vertical through groove. A clearance groove one is provided at the top left end of the limiting and fixing block one, which extends through the front and rear sides. A clearance groove two is provided at the top right side of the limiting and fixing block two, which extends through the front and rear sides.

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