A flexible ejection structure to avoid damage at the edge of the molding die

Abstract

This utility model discloses a flexible ejection structure to avoid damage at the edge of the molding die, relating to the field of mold technology. The utility model includes a base, a slide rail fixedly connected to the top of the base, an upper fixed plate fixedly connected to the top of the slide rail, and an ejection mechanism on the top of the base for initial ejection of the injection molded part. A secondary ejection assembly is provided on the top of the upper fixed plate for secondary ejection of the injection molded part. The utility model works by starting a first motor to drive a first transmission shaft to rotate. When the first transmission shaft rotates, the worm gear rotates, and the worm wheel rotates. At this time, the central rod also rotates. When the central rod rotates, the first connecting rod also rotates, causing the second connecting rod to move. This movement of the connecting rod pushes the moving plate up and down, thus initially ejecting the injection molded part. When the moving plate reaches its highest point, a second motor is started to drive the second transmission shaft to rotate.

Description

Technical Field

[0001] This utility model belongs to the field of mold technology, and in particular relates to a flexible ejection structure that avoids damage at the edge of the molding mold. Background Technology

[0002] The ejector mechanism is one of the core functional components of molding dies (such as plastic molds, die-casting molds, stamping dies, etc.). Its core function is to safely, completely, and without damage eject the product (such as plastic parts, die-cast parts, rubber parts) from the mold cavity (or core) after molding (such as injection molding, die casting, pressing) so that it can be removed for the next molding cycle. Simply put, the ejector mechanism is the key system in the mold that "takes out" the molded product.

[0003] Chinese patent CN222346208U discloses an ejection structure for molding threaded injection molded parts, including a housing. The inner wall of the housing has a receiving hole, and a servo motor is installed in the receiving hole. The servo motor has a swing arm, and a connecting rod is provided on the top end face of the swing arm. A sliding block is provided on the connecting rod. A fixing rod is provided on the bottom wall of the housing, and a fixing block is fixed at the end of the fixing rod. The fixing block has a first sliding groove, and a sliding block is provided in the first sliding groove. A driven block is provided on the end face of the sliding block, and the sliding block is located in a second sliding groove on the driven block.

[0004] As shown above, when performing top operations, this device may have difficulty gently ejecting the object that needs to be ejected a second time. If the force of the ejection is too large at one time, it may cause significant wear or direct damage to the ejected object. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a flexible ejection structure that avoids damage at the edge of the molding die, thus solving the problem of wear or damage to the top object.

[0006] To achieve the above objectives, this utility model is implemented through the following technical solution: a flexible ejection structure to avoid damage at the edge of the molding die, including a base, a slide rail fixedly connected to the top of the base, an upper fixing plate fixedly connected to the top of the slide rail, an ejection mechanism provided on the top of the base for the initial ejection of the injection molded part, and a secondary ejection assembly provided on the top of the upper fixing plate for the secondary ejection of the injection molded part.

[0007] The ejection mechanism includes a slider that slides on the inner wall of a slide rail. A movable plate is fixedly connected to the outer wall of the slider. A first motor is fixedly connected to the top of the base. A transmission shaft is fixedly connected to the bottom output end of the first motor via a coupling. A worm is fixedly connected to the outer wall of the transmission shaft. A worm wheel is meshed with the outer surface of the worm. A central rod is fixedly connected to the inner wall of the worm wheel. Connecting rods are fixedly connected to both ends of the central rod. Connecting rods are rotatably connected to the outer wall of connecting rods.

[0008] Preferably, the secondary top assembly includes a second motor fixed to the top of the movable plate. The bottom output end of the second motor is fixedly connected to a second transmission shaft via a coupling. A first bevel gear is fixedly connected to the outer wall of the second transmission shaft. A second bevel gear is meshed with the outer surface of the first bevel gear. A threaded rod is fixedly connected to the top of the second bevel gear. A primary top block is fixedly connected to the top of the movable plate. A limit plate is slidably connected to the inner wall of the primary top block. A secondary top pin is fixedly connected to the top of the limit plate.

[0009] Preferably, the top of the upper fixing plate is provided with a replacement mechanism for replacing different molds. The replacement mechanism includes a lock box, and the inner wall of the lock box is rotatably connected with bolts.

[0010] Preferably, a handle is fixedly connected to the bottom of the bolt, and a fixing block is slidably connected to the inner wall of the upper fixing plate, with the inner wall of the fixing block threadedly connected to the outer surface of the bolt.

[0011] Preferably, a sealing plate is fixedly connected to the top of the fixing block, a limiting frame is fixedly connected to the top of the sealing plate, an upper mold is slidably connected to the inner wall of the limiting frame, a sprocket is fixedly connected to the outer surface of the bolt, and a chain is meshed with the outer surface of the sprocket.

[0012] Preferably, the inner wall of the limiting plate is threadedly connected to the outer surface of the threaded rod, and the outer surface of the threaded rod is rotatably connected to the inner wall of the primary top block.

[0013] This utility model has the following beneficial effects:

[0014] 1. This flexible ejection structure, designed to prevent damage to the edges of the molding die, utilizes a first motor to drive a transmission shaft. This rotation of the transmission shaft causes the worm gear to rotate, which in turn causes the worm wheel to rotate. Simultaneously, the center rod rotates, and the connecting rod rotates, causing the connecting rod 1 to move. This movement of the connecting rod 2 pushes the moving plate up and down, initially lifting the injection molded part. When the moving plate reaches its highest point, the second motor is activated, driving the transmission shaft 2. This causes the bevel gear 1 to rotate, which in turn drives the bevel gear 2 to rotate. The threaded rod then rotates, and as it rotates, the limiting plate moves along the groove on its outer surface. The secondary ejector pins also move, gradually lifting the injection molded part a second time, thus completing the demolding process. The advantage of this secondary lifting and demolding is that it ensures complete demolding, maintains the precision of the injection molded part, and protects the edges from damage.

[0015] 2. This flexible ejection structure, which avoids damage to the edge of the molding die, works by aligning the fixing block with the groove on the upper fixing plate and turning the handle to rotate the bolt fixed at the top. As the bolt rotates, it slowly moves downwards until the bottom of the sealing plate is in close contact with the top of the upper fixing plate. At the same time, the bolt rotates, which in turn drives the sprocket fixed on the outer surface of the bolt to rotate. The chain wrapped around the outer surface of the four sprockets will drive the four sprockets to rotate simultaneously, thus making the four bolts run synchronously. If necessary, the mold needs to be removed and replaced, and vice versa. Its advantage is that the mold can be replaced, thus adapting to the processing of different injection molded parts.

[0016] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the movable plate structure of this utility model;

[0020] Figure 3 This is a schematic diagram of the connecting rod structure of this utility model;

[0021] Figure 4 This is a schematic diagram of the secondary ejector pin structure of this utility model;

[0022] Figure 5 This is a schematic diagram of the bolt structure of this utility model.

[0023] The attached diagram lists the components represented by each number as follows:

[0024] 1. Base; 2. Slide rail; 3. Upper fixed plate; 4. Slider; 5. Moving plate; 6. First motor; 7. Drive shaft one; 8. Worm gear; 9. Worm wheel; 10. Center rod; 11. Connecting rod one; 12. Connecting rod two; 13. Second motor; 14. Drive shaft two; 15. Bevel gear one; 16. Bevel gear two; 17. Primary ejector block; 18. Threaded rod; 19. Limiting plate; 20. Secondary ejector pin; 21. Locking box; 22. Bolt; 23. Handle; 24. Fixing block; 25. Sealing plate; 26. Limiting frame; 27. Upper mold; 28. Sprocket; 29. ​​Chain. Detailed Implementation

[0025] 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.

[0026] This utility model provides two technical solutions:

[0027] Figures 1-4 The first embodiment is shown: a flexible ejection structure to avoid damage at the edge of the molding die, including a base 1, a slide rail 2 fixedly connected to the top of the base 1, an upper fixing plate 3 fixedly connected to the top of the slide rail 2, an ejection mechanism provided on the top of the base 1 for the initial ejection of the injection molded part, and a secondary ejection assembly provided on the top of the upper fixing plate 3 for the secondary ejection of the injection molded part.

[0028] The ejection mechanism includes a slider 4 that slides on the inner wall of the slide rail 2. A movable plate 5 is fixedly connected to the outer wall of the slider 4. A first motor 6 is fixedly connected to the top of the base 1. A transmission shaft 7 is fixedly connected to the bottom output end of the first motor 6 through a coupling. A worm 8 is fixedly connected to the outer wall of the transmission shaft 7. A worm wheel 9 is meshed with the outer surface of the worm 8. A central rod 10 is fixedly connected to the inner wall of the worm wheel 9. A connecting rod 11 is fixedly connected to both ends of the central rod 10. A connecting rod 2 12 is rotatably connected to the outer wall of the connecting rod 11.

[0029] The secondary top assembly includes a second motor 13, which is fixed to the top of the movable plate 5. The bottom output end of the second motor 13 is fixedly connected to a second transmission shaft 14 via a coupling. A first bevel gear 15 is fixedly connected to the outer wall of the second transmission shaft 14. A second bevel gear 16 is meshed with the outer surface of the first bevel gear 15. A threaded rod 18 is fixedly connected to the top of the second bevel gear 16. A primary top block 17 is fixedly connected to the top of the movable plate 5. A limit plate 19 is slidably connected to the inner wall of the primary top block 17. A secondary top pin 20 is fixedly connected to the top of the limit plate 19.

[0030] The first motor 6 is activated, driving the transmission shaft 7, which is fixed at its output end, to rotate. When the transmission shaft 7 rotates, the worm 8, which is fixed on its outer wall, rotates. When the worm 8 rotates, the worm wheel 9, which is meshed with its outer surface, rotates. At this time, the center rod 10, which is fixed on the inner wall of the worm wheel 9, also rotates. When the center rod 10 rotates, the connecting rod 11, which is fixed at both ends, also rotates. At this time, the connecting rod 12, which rotates on the outer wall of the connecting rod 11, moves, thereby pushing the moving plate 5 up and down. At this time, the primary ejector block 17, which is fixed at the top of the moving plate 5, will initially eject the injection molded part. When the moving plate 5 moves to the top, the second motor 13 is started to drive the transmission shaft 14 fixed at its output end to rotate. At this time, the bevel gear 15 fixed on the outer wall of the transmission shaft 14 will rotate. When the bevel gear 15 rotates, it will drive the bevel gear 16 meshing with it to rotate. At this time, the threaded rod 18 fixed on the top of the bevel gear 16 will rotate. When the threaded rod 18 rotates, the limiting plate 19 on its outer surface will move along the groove on the outer surface of the threaded rod 18. At this time, the secondary ejector pin 20 fixed on the top of the limiting plate 19 will also move, slowly pushing the injection molded part to the second ejection, thereby completing the demolding.

[0031] Figures 1-5 The second embodiment is shown. The main difference from the first embodiment is that the top of the upper fixed plate 3 is provided with a replacement mechanism for replacing different molds. The replacement mechanism includes a lock box 21. The inner wall of the lock box 21 is rotatably connected to a bolt 22. The bottom of the bolt 22 is fixedly connected to a handle 23. The inner wall of the upper fixed plate 3 is slidably connected to a fixing block 24. The inner wall of the fixing block 24 is threadedly connected to the outer surface of the bolt 22. The top of the fixing block 24 is fixedly connected to a sealing plate 25. The top of the sealing plate 25 is fixedly connected to a limit frame 26. The inner wall of the limit frame 26 is slidably connected to an upper mold 27. The outer surface of the bolt 22 is fixedly connected to a sprocket 28. The outer surface of the sprocket 28 is meshed with a chain 29.

[0032] The inner wall of the limiting plate 19 is threadedly connected to the outer surface of the threaded rod 18, and the outer surface of the threaded rod 18 is rotatably connected to the inner wall of the primary top block 17.

[0033] By aligning the fixing block 24 with the groove on the upper fixing plate 3, the handle 23 is turned to drive the bolt 22 fixed at its top to rotate. When the bolt 22 rotates, it will slowly move the bolt 22 downwards until the bottom of the sealing plate 25 is close to the top of the upper fixing plate 3. At the same time, the bolt 22 will drive the sprocket 28 fixed on the outer surface of the bolt 22 to rotate. At this time, the chain 29 wrapped around the outer surface of the four sprockets 28 will drive the four sprockets 28 to rotate simultaneously, so that the four bolts 22 run synchronously. If it needs to be removed and the mold replaced, the operation can be reversed.

[0034] Furthermore, all content not described in detail in this specification is existing technology known to those skilled in the art, and the model parameters of each electrical component are not specifically limited; conventional equipment can be used.

[0035] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0036] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A flexible ejection structure to avoid damage at the edge of a molding die, comprising a base (1), characterized in that: The base (1) is fixedly connected to the top of the slide rail (2), the slide rail (2) is fixedly connected to the top of the upper fixing plate (3), the base (1) is provided with an ejection mechanism for the initial demolding of the injection molded part, and the upper fixing plate (3) is provided with a secondary top assembly for the secondary top of the injection molded part. The ejection mechanism includes a slider (4) that slides on the inner wall of the slide rail (2). A movable plate (5) is fixedly connected to the outer wall of the slider (4). A first motor (6) is fixedly connected to the top of the base (1). A transmission shaft (7) is fixedly connected to the bottom output end of the first motor (6) through a coupling. A worm (8) is fixedly connected to the outer wall of the transmission shaft (7). A worm wheel (9) is meshed with the outer surface of the worm (8). A central rod (10) is fixedly connected to the inner wall of the worm wheel (9). A connecting rod (11) is fixedly connected to both ends of the central rod (10). A connecting rod (12) is rotatably connected to the outer wall of the connecting rod (11).

2. The flexible ejection structure for avoiding damage at the edge of the molding die according to claim 1, characterized in that, The secondary top assembly includes a second motor (13) fixed to the top of the movable plate (5). The bottom output end of the second motor (13) is fixedly connected to a second transmission shaft (14) via a coupling. A first bevel gear (15) is fixedly connected to the outer wall of the second transmission shaft (14). A second bevel gear (16) is meshed with the outer surface of the first bevel gear (15). A threaded rod (18) is fixedly connected to the top of the second bevel gear (16). A primary top block (17) is fixedly connected to the top of the movable plate (5). A limit plate (19) is slidably connected to the inner wall of the primary top block (17). A secondary top pin (20) is fixedly connected to the top of the limit plate (19).

3. The flexible ejection structure for avoiding damage at the edge of the molding die according to claim 1, characterized in that, The top of the upper fixing plate (3) is provided with a replacement mechanism for replacing different molds. The replacement mechanism includes a lock box (21), and the inner wall of the lock box (21) is rotatably connected with bolts (22).

4. The flexible ejection structure for avoiding damage at the edge of the molding die according to claim 3, characterized in that, The bottom of the bolt (22) is fixedly connected to a handle (23), and the inner wall of the upper fixing plate (3) is slidably connected to a fixing block (24), and the inner wall of the fixing block (24) is threadedly connected to the outer surface of the bolt (22).

5. The flexible ejection structure for avoiding damage at the edge of the molding die according to claim 4, characterized in that, A sealing plate (25) is fixedly connected to the top of the fixing block (24), a limiting frame (26) is fixedly connected to the top of the sealing plate (25), an upper mold (27) is slidably connected to the inner wall of the limiting frame (26), a sprocket (28) is fixedly connected to the outer surface of the bolt (22), and a chain (29) is meshed with the outer surface of the sprocket (28).

6. The flexible ejection structure for avoiding damage at the edge of the molding die according to claim 2, characterized in that, The inner wall of the limiting plate (19) is threadedly connected to the outer surface of the threaded rod (18), and the outer surface of the threaded rod (18) is rotatably connected to the inner wall of the primary top block (17).

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