A mold for polyurethane foaming

Abstract

This utility model discloses a mold for polyurethane foaming, belonging to the field of foaming mold technology. It includes a foaming box, with uniform distribution mechanisms on both side walls to ensure even distribution of polyurethane. Through the coordinated use of these devices, this utility model, by incorporating a push-pull mechanism and a uniform distribution mechanism, allows the push-pull mechanism to move flexibly back and forth on the foaming box via a guide rail connection. This facilitates the movement of the foaming material within the foaming box, effectively dispersing the material quickly and evenly. This further solves the problem of incomplete foaming of polyurethane within the foaming box, ensuring the foaming quality of the polyurethane. Simultaneously, with the assistance of the uniform distribution mechanism, the vibration generated by tapping further distributes the polyurethane evenly within the foaming box, increasing the foaming density and further improving the foaming quality of the polyurethane.

Description

Technical Field

[0001] This utility model belongs to the field of foaming mold technology, and in particular relates to a mold for polyurethane foaming. Background Technology

[0002] Polyurethane, short for polyurethane, is a high-molecular-weight material with excellent mechanical properties formed by the condensation reaction of polyols and polyisocyanates. It is extremely ductile. In order to maintain the required shape during the foaming process, polyurethane is injected into a mold, and then shaped by the mold to meet the required shape.

[0003] A search revealed Chinese Patent Publication No. CN220638706U, which discloses an easy-to-operate environmentally friendly polyurethane foaming mold. The mold includes a lower mold, a hinge fixedly mounted on the left side of the lower mold, an upper mold fixedly mounted on the top of the hinge, and first fixing plates fixedly mounted on the front and rear sides of the upper mold. A connecting component is mounted on the right side of the first fixing plate, and a moving block is mounted on the right side of the first fixing plate via the connecting component. A sliding rod is slidably connected inside the moving block, and a second fixing plate is fixedly mounted on the surface of the sliding rod. After the polyurethane product is formed, pulling the limiting component separates the locking block from the locking groove. The reaction force of the first spring causes the moving block to move to the left, and the connecting component and the first fixing plate cause the upper mold to flip upwards, separating the upper mold from the lower mold. This achieves the goal of automatically separating the upper and lower molds, reducing the waste of workers' physical strength and lowering their workload.

[0004] Regarding the aforementioned technologies, the inventors have discovered the following defects: When polyurethane foaming, the isocyanate component B of the polyurethane is usually mixed and stirred evenly with the polyol component A, additives, etc., and then poured into a mold. However, when the viscosity of components A and B is high, and the viscosity increases due to the reaction during the initial mixing and stirring, the fluidity of the material in the mold becomes poor, resulting in the foam not being fully expanded in the mold, which affects the appearance and size of the foam after demolding.

[0005] Therefore, this utility model provides a mold for polyurethane foaming to solve the above problems. Utility Model Content

[0006] (a) Technical problems to be solved

[0007] This invention provides a mold for polyurethane foaming, aiming to solve the problems mentioned in the background art.

[0008] (II) Technical Solution

[0009] To achieve the above objectives, this utility model provides the following technical solution:

[0010] A mold for polyurethane foaming includes: a foaming box, wherein guide grooves are symmetrically arranged on the upper surface of the foaming box, a receiving groove is arranged on the inner side wall of the foaming box, a base is fixedly installed on the lower surface of the foaming box, a push-pull mechanism for dispersing polyurethane is arranged on the inner wall of the guide grooves, a uniform mechanism for evenly distributing polyurethane is arranged on both side walls of the foaming box, and a lifting mechanism for lifting the shaped polyurethane is arranged on the lower surface of the foaming box.

[0011] The push-pull mechanism includes a fixed column, with fixed blocks fixedly installed at both ends of the fixed column. Push-pull rods are fixedly installed at equal intervals on the lower surface of the fixed blocks. One end of the push-pull rod extends into the interior of the foaming box, and the push-pull rod is compatible with the storage slot.

[0012] As a further description of the above technical solution:

[0013] A guide rail is fixedly installed on the lower surface of the fixed block. The outer surface of the guide rail is slidably connected to the inner wall of the guide groove. One end of the guide rail extends to the outside of the guide groove. A pull rod is fixedly installed between the guide rails.

[0014] As a further description of the above technical solution:

[0015] The uniform mechanism includes a ball screw and a rotating rod. Both ends of the ball screw are rotatably mounted with mounting plates. One end of the ball screw extends to the outside of one of the mounting plates. A screw sleeve is threaded onto the outer surface of the ball screw. The side wall of the screw sleeve is fixedly connected to the side wall of the fixed block.

[0016] As a further description of the above technical solution:

[0017] Both ends of the rotating rod are rotatably mounted with positioning plates, and one end of the rotating rod extends to the outside of one of the positioning plates. The outer surfaces of the rotating rod and the ball screw are fixedly mounted with toothed sprockets, which are connected by a toothed chain drive. The outer surface of the rotating rod is fixedly mounted with a dial plate at equal intervals, and the outer surface of the dial plate is fixedly mounted with several stops at equal intervals.

[0018] As a further description of the above technical solution:

[0019] The uniformizing mechanism also includes several mounting brackets. The side wall of the mounting bracket is fixedly connected to the side wall of the foaming box. A support spring is fixedly installed on the other side wall of the mounting bracket. A mounting ring is fixedly installed at one end of the support spring. A movable plate is fixedly installed on the inner wall of the mounting ring.

[0020] As a further description of the above technical solution:

[0021] One end of the movable plate passes through the interior of the support spring and extends into the interior of the mounting bracket. A lever is fixedly installed on the lower surface of the movable plate, and the lever is adapted to the lever disc.

[0022] As a further description of the above technical solution:

[0023] The lifting mechanism includes a lifting plate, the outer surface of which is in contact with the inner wall of the base. Both sides of the lifting plate are fixedly installed with a lever plate, one end of which extends to the outside of the base. A connecting spring and a connecting column are fixedly installed on the upper surface of the lifting plate, and one end of the connecting spring is fixedly connected to the lower surface of the foaming box.

[0024] As a further description of the above technical solution:

[0025] One end of the connecting column passes through the interior of the connecting spring and extends into the interior of the foaming box. A lifting plate is fixedly installed at one end of the connecting column, and the outer surface of the lifting plate is in contact with the inner wall of the foaming box.

[0026] (III) Beneficial Effects

[0027] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are:

[0028] 1. In this utility model, by setting up a push-pull mechanism and a uniform mechanism, the push-pull mechanism can move flexibly back and forth on the foaming box by connecting the foaming box and the push-pull mechanism with a guide rail, which makes it easier to move the foaming material in the foaming box, effectively making the foaming material quickly and evenly dispersed in the foaming box, further solving the problem of insufficient foaming of polyurethane in the foaming box, and ensuring the foaming quality of polyurethane. At the same time, with the assistance of the uniform mechanism, the vibration generated by knocking makes the polyurethane evenly distributed in the foaming box, increasing the foaming density of polyurethane in the foaming box, and further improving the foaming quality of polyurethane.

[0029] 2. In this utility model, by setting up a lifting mechanism, after the polyurethane foaming is completed, the polyurethane foaming material is lifted from the foaming box by the lifting mechanism, which makes it easier to take out the polyurethane foam in the foaming box, increases the difficulty of taking out the mold, further reflects the convenience of using the mold, and improves the efficiency of using the mold. Attached Figure Description

[0030] Figure 1 This is a three-dimensional structural diagram of a mold used for polyurethane foaming.

[0031] Figure 2 This is an exploded structural diagram of the foaming box and push-pull mechanism in a mold used for polyurethane foaming.

[0032] Figure 3 This is an exploded structural diagram of the foaming box and lifting mechanism in a mold used for polyurethane foaming.

[0033] Figure 4 For a mold used in polyurethane foam Figure 1 A magnified structural diagram of point A in the middle.

[0034] Legend:

[0035] 1. Foaming box; 2. Base; 3. Lifting mechanism; 301. Lifting plate; 302. Paddle plate; 303. Connecting spring; 304. Connecting column; 305. Lifting plate; 4. Push-pull mechanism; 401. Fixed column; 402. Fixed block; 403. Push-pull rod; 404. Guide rail; 405. Pull rod; 5. Evenly distributing mechanism; 501. Ball screw; 502. Mounting plate; 503. Screw sleeve; 504. Rotating rod; 505. Positioning plate; 506. Toothed sprocket; 507. Actuating disc; 508. Mounting bracket; 509. Support spring; 5010. Mounting ring; 5011. Movable plate; 5012. Paddle block; 6. Guide groove; 7. Storage groove. Detailed Implementation

[0036] 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 skilled in the art without creative effort are within the protection scope of the present utility model.

[0037] In specific implementation, such as Figures 1-4 As shown, this utility model provides a technical solution: a mold for polyurethane foaming, including a foaming box 1, a guide groove 6 symmetrically arranged on the upper surface of the foaming box 1, a storage groove 7 arranged on the inner side wall of the foaming box 1, a base 2 fixedly installed on the lower surface of the foaming box 1, a push-pull mechanism 4 for dispersing polyurethane arranged on the inner wall of the guide groove 6, a uniform mechanism 5 for evenly placing polyurethane on both side walls of the foaming box 1, and a lifting mechanism 3 for lifting the shaped polyurethane on the lower surface of the foaming box 1; wherein, the push-pull mechanism 4 includes a fixed column 401, a fixed block 402 fixedly installed at both ends of the fixed column 401, a push-pull rod 403 fixedly installed at equal intervals on the lower surface of the fixed block 402, one end of the push-pull rod 403 extending into the interior of the foaming box 1, and the push-pull rod 403 and the storage groove 7 being mutually adapted.

[0038] A guide rail 404 is fixedly installed on the lower surface of the fixed block 402. The outer surface of the guide rail 404 is slidably connected to the inner wall of the guide groove 6. One end of the guide rail 404 extends to the outside of the guide groove 6. A pull rod 405 is fixedly installed between the guide rails 404.

[0039] The uniform mechanism 5 includes a ball screw 501 and a rotating rod 504. Both ends of the ball screw 501 are rotatably mounted with mounting plates 502. One end of the ball screw 501 extends to the outside of one of the mounting plates 502. A screw sleeve 503 is threadedly mounted on the outer surface of the ball screw 501. The side wall of the screw sleeve 503 is fixedly connected to the side wall of the fixing block 402.

[0040] Both ends of the rotating rod 504 are rotatably mounted with positioning plates 505. One end of the rotating rod 504 extends to the outside of one of the positioning plates 505. The outer surfaces of the rotating rod 504 and the ball screw 501 are both fixedly mounted with toothed sprockets 506. The toothed sprockets 506 are connected by a toothed chain drive. The outer surface of the rotating rod 504 is fixedly mounted with a dial 507 at equal intervals. The outer surface of the dial 507 is fixedly mounted with several stops at equal intervals.

[0041] The uniform mechanism 5 also includes several mounting brackets 508. The side wall of the mounting bracket 508 is fixedly connected to the side wall of the foaming box 1. A support spring 509 is fixedly installed on the other side wall of the mounting bracket 508. An installation ring 5010 is fixedly installed on one end of the support spring 509. A movable plate 5011 is fixedly installed on the inner wall of the installation ring 5010.

[0042] One end of the movable plate 5011 passes through the interior of the support spring 509 and extends into the interior of the mounting bracket 508. A toggle block 5012 is fixedly installed on the lower surface of the movable plate 5011, and the toggle block 5012 is compatible with the toggle disc 507.

[0043] Specifically, by setting up a push-pull mechanism 4 and a uniform dispersing mechanism 5, after the foaming material is poured into the foaming box 1, the pull rod 405 drives the guide rail 404 to move within the guide groove 6. As the guide rail 404 moves, it drives the fixing block 402 to move the fixing column 401 synchronously. At this time, the fixing column 401 drives the push-pull rod 403 to move from the receiving groove 7 into the foaming box 1. As the push-pull rod 403 moves within the foaming box 1, it agitates the foaming material, thereby dispersing the foaming material evenly within the foaming box 1. When the fixing block 402 moves, it drives the screw sleeve 503 to move on the outer surface of the ball screw 501. Under the action of the thread, the ball screw 501 will... The rotating rod 504 rotates under the limit of the mounting plate 502. Under the action of the toothed sprocket 506 and the toothed chain, the rotating rod 504 rotates under the limit of the positioning plate 505. At this time, the rotating rod 504 drives the actuating plate 507 to rotate synchronously. With the cooperation of the actuating plate 507 and the actuating block 5012, the movable plate 5011 moves back and forth in the mounting frame 508 under the action of the support spring 509 and the mounting ring 5010. This causes the movable plate 5011 to strike the side wall of the foaming box 1. The foaming box 1 will vibrate when struck. The vibration makes the foaming material evenly dispersed in the foaming box 1, ensuring that the foaming material is sufficient in the foaming box 1.

[0044] The lifting mechanism 3 includes a lifting plate 301. The outer surface of the lifting plate 301 is in contact with the inner wall of the base 2. A lever 302 is fixedly installed on both sides of the lifting plate 301. One end of the lever 302 extends to the outside of the base 2. A connecting spring 303 and a connecting column 304 are fixedly installed on the upper surface of the lifting plate 301. One end of the connecting spring 303 is fixedly connected to the lower surface of the foaming box 1.

[0045] One end of the connecting post 304 passes through the interior of the connecting spring 303 and extends into the interior of the foaming box 1. A lifting plate 305 is fixedly installed on one end of the connecting post 304, and the outer surface of the lifting plate 305 is in contact with the inner wall of the foaming box 1.

[0046] Specifically, by setting up the lifting mechanism 3, after the foaming material solidifies in the foaming box 1, the lifting plate 301 is moved towards the foaming box 1 by the lever 302. At this time, the lifting plate 301 will drive the lifting plate 305 to move upward inside the foaming box 1 through the connecting column 304. As the lifting plate 305 moves upward, it will drive the solidified foaming material to move to the outside of the foaming box 1. Then the lifted foaming material is taken out. After the foaming material is taken out, the lifting plate 301 will be reset by the connecting column 304 under the action of the connecting spring 303.

[0047] Working principle: The foaming material is poured into the foaming box 1. Then, by moving the push-pull mechanism 4, the push-pull rod 403 in the push-pull mechanism 4 moves the foaming material, thereby dispersing the foaming material evenly in the foaming box 1. As the push-pull mechanism 4 moves, it drives the uniform mechanism 5 to work. At this time, the movable plate 5011 in the uniform mechanism 5 will swing back and forth in the mounting frame 508, thereby causing the movable plate 5011 to intermittently knock on the foaming box 1. By making the foaming box 1 vibrate, the foaming material is evenly distributed in the foaming box 1.

[0048] After the foaming material has finished foaming, the lifting mechanism 3 is lifted above the base 2 by the lever 302. As the lifting mechanism 3 moves upward, the solidified foamed material will move upward synchronously. Then the solidified foamed material is taken out from the foaming box 1.

[0049] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A mold for polyurethane foaming, characterized in that: include: Foaming box (1), the upper surface of the foaming box (1) is symmetrically provided with guide grooves (6), the inner side wall of the foaming box (1) is provided with a storage groove (7), the lower surface of the foaming box (1) is fixedly installed with a base (2), the inner wall of the guide groove (6) is provided with a push-pull mechanism (4) for dispersing polyurethane, the two side walls of the foaming box (1) are provided with a uniform mechanism (5) for evenly placing polyurethane, and the lower surface of the foaming box (1) is provided with a lifting mechanism (3) for lifting the shaped polyurethane. The push-pull mechanism (4) includes a fixed column (401), and fixed blocks (402) are fixedly installed at both ends of the fixed column (401). Push-pull rods (403) are fixedly installed at equal intervals on the lower surface of the fixed blocks (402). One end of the push-pull rod (403) extends into the interior of the foam box (1), and the push-pull rod (403) is compatible with the storage slot (7).

2. The mold for polyurethane foaming according to claim 1, characterized in that, The lower surface of the fixed block (402) is fixedly mounted with a guide rail (404), the outer surface of the guide rail (404) is slidably connected to the inner wall of the guide groove (6), one end of the guide rail (404) extends to the outside of the guide groove (6), and a pull rod (405) is fixedly mounted between the guide rails (404).

3. A mold for polyurethane foaming according to claim 1, characterized in that, The uniform mechanism (5) includes a ball screw (501) and a rotating rod (504). Both ends of the ball screw (501) are rotatably mounted with mounting plates (502). One end of the ball screw (501) extends to the outside of one of the mounting plates (502). A screw sleeve (503) is threaded onto the outer surface of the ball screw (501). The side wall of the screw sleeve (503) is fixedly connected to the side wall of the fixing block (402).

4. A mold for polyurethane foaming according to claim 3, characterized in that, Both ends of the rotating rod (504) are rotatably mounted with positioning plates (505). One end of the rotating rod (504) extends to the outside of one of the positioning plates (505). The outer surfaces of the rotating rod (504) and the ball screw (501) are both fixedly mounted with toothed sprockets (506). The toothed sprockets (506) are connected by a toothed chain drive. The outer surface of the rotating rod (504) is fixedly mounted with a dial plate (507) at equal intervals. The outer surface of the dial plate (507) is fixedly mounted with several stops at equal intervals.

5. A mold for polyurethane foaming according to claim 1, characterized in that, The uniform mechanism (5) also includes several mounting brackets (508). The side wall of the mounting bracket (508) is fixedly connected to the side wall of the foaming box (1). A support spring (509) is fixedly installed on the other side wall of the mounting bracket (508). An installation ring (5010) is fixedly installed at one end of the support spring (509). A movable plate (5011) is fixedly installed on the inner wall of the installation ring (5010).

6. A mold for polyurethane foaming according to claim 5, characterized in that, One end of the movable plate (5011) passes through the interior of the support spring (509) and extends into the interior of the mounting bracket (508). A toggle block (5012) is fixedly installed on the lower surface of the movable plate (5011), and the toggle block (5012) is adapted to the toggle disc (507).

7. A mold for polyurethane foaming according to claim 1, characterized in that, The lifting mechanism (3) includes a lifting plate (301), the outer surface of which is in contact with the inner wall of the base (2), and a lever (302) is fixedly installed on both sides of the lifting plate (301). One end of the lever (302) extends to the outside of the base (2). A connecting spring (303) and a connecting column (304) are fixedly installed on the upper surface of the lifting plate (301), and one end of the connecting spring (303) is fixedly connected to the lower surface of the foaming box (1).

8. A mold for polyurethane foaming according to claim 7, characterized in that, One end of the connecting column (304) passes through the interior of the connecting spring (303) and extends into the interior of the foaming box (1). A lifting plate (305) is fixedly installed on one end of the connecting column (304), and the outer surface of the lifting plate (305) is in contact with the inner wall of the foaming box (1).

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