A mold with a simple secondary ejection structure

Abstract

The application belongs to the technical field of mold stripping, and particularly relates to a mold with a simple secondary ejection structure, which comprises a bottom plate, a front mold core, a rear mold core, an A plate, a B plate, a ejector pin fixing plate, an ejector pin bottom plate, a ejector rod, a secondary ejector pin fixing block, a secondary ejector pin pressing block, a first ejector pin, a second ejector pin, a third ejector pin, a cold runner and a product, the B plate is arranged above the bottom plate, the A plate is slidingly arranged on the B plate, the rear mold core is arranged on the B plate, the front mold core is arranged at one end of the A plate close to the B plate, the product is located between the front mold core and the rear mold core, the cold runner is located in the rear mold core, one end of the ejector rod penetrates through the bottom plate, and the other end is connected with an injection molding machine. Through cooperation of the above structures, the secondary ejection effect can be achieved without using a secondary ejection standard part. The structure is simple and effective, can reduce processing cost and production cost, and thus improves production benefit.

Description

Technical Field

[0001] This invention belongs to the field of mold demolding technology, specifically a mold with a simple secondary ejection structure. Background Technology

[0002] Generally speaking, if the gate of a plastic product is located inside and is deep, it will be difficult to separate the cold runner gate from the product. To solve this problem, a secondary ejection device is often used. This device can first eject the runner to separate it from the product, and then eject the product. However, conventional secondary ejection standard parts are often expensive and therefore not suitable for all products and molds.

[0003] Therefore, the present invention provides a mold with a simple secondary ejection structure. Summary of the Invention

[0004] In order to overcome the shortcomings of the prior art, at least one technical problem raised in the background art is solved.

[0005] The technical solution adopted by the present invention to solve its technical problem is as follows: The present invention provides a mold with a simple secondary ejection structure, including a base plate, a front mold core, a rear mold core, an A plate, a B plate, an ejector pin fixing plate, an ejector pin base plate, an ejector roller, a secondary ejector pin fixing block, a secondary ejector pin pressing block, a first ejector pin, a second ejector pin, a third ejector pin, a cold runner, and a product;

[0006] Plate B is positioned above the base plate, Plate A is slidably mounted on Plate B, the rear mold core is positioned on Plate B, the front mold core is positioned at the end of Plate A near Plate B, the product is located between the front mold core and the rear mold core, and the cold runner is located inside the rear mold core.

[0007] One end of the ejector rod passes through the base plate, and the other end is connected to the injection molding machine. The bottom end of the secondary ejector pin block is connected to the top end of the ejector rod. The secondary ejector pin fixing block is located above the secondary ejector pin block. The secondary ejector pin fixing block and the secondary ejector pin block are connected by bolts and are set between the ejector pin fixing plate and the ejector pin base plate. There is a space between the secondary ejector pin fixing block and the ejector pin fixing plate. The second ejector pin and the third ejector pin are set on the secondary ejector pin fixing block.

[0008] The first ejector pin is set on the ejector pin fixing plate, and the other end of the first ejector pin is in contact with the product.

[0009] The ejector roller first pushes out the third ejector pin under the cold runner, causing the cold runner to detach from the product. Then the first and second ejector pins push out, completely ejecting the product from the rear mold core. This achieves separate ejection of the product and the cold runner. This structure is not only simple and effective, but it can also reduce processing and production costs, thereby improving production efficiency and benefiting the company's development and progress.

[0010] The B plate is provided with a first inlet and a first outlet. Both the first inlet and the first outlet are provided with connecting pipes. A connecting shell is provided on one side of the B plate, and an external pipe that is inserted into the connecting pipe is fixedly connected inside the connecting shell.

[0011] The connecting pipe has a top pressure ball inside, and a moving groove for the top pressure ball to slide up and down is opened inside the connecting pipe. A top pressure groove is opened below the moving groove.

[0012] The inner wall of the outer pipe is fixedly connected to a top pressure block, and the inner wall of the outer pipe is provided with a slot for the top pressure ball to engage.

[0013] By controlling the connecting shell, the two outer pipes are driven to be inserted into the connecting pipes in the first inlet and the first outlet respectively. The top pressure block pushes the top pressure ball into the slot to complete the engagement.

[0014] A baffle is elastically installed at one end of the top pressure block near the top pressure ball. The baffle can lock the outer pipe and the connecting pipe.

[0015] A pressing rod is slidably installed inside the outer pipe. The pressing rod is located above the baffle. The baffle and the top pressure ball can be released by pressing the rod.

[0016] The connecting pipe has a connecting groove inside, which is connected to the top pressure groove.

[0017] A filter plate is fixedly installed on the inner wall of the outer pipe. A rotating ring is rotatably installed inside the filter plate. One end of the rotating ring extends out of the outer wall of the filter plate and is fixedly connected to a scraper. One end of the scraper is in contact with the surface of the filter plate. The filter plate can filter the liquid. The surface of the filter plate can be cleaned by controlling the rotation of the rotating ring and the scraper.

[0018] A drive roller is slidably installed inside the rotating ring. The outer wall of the drive roller has a spiral groove. A guide block is fixedly installed on the inner wall of the rotating ring. One end of the guide block extends into the spiral groove. The drive roller slides inside the rotating ring. The rotation of the rotating ring and the scraper can be controlled by the action of the guide block and the spiral groove.

[0019] The top surface of the top pressure block, away from the baffle, is inclined. A baffle plate is fixedly installed on the inner wall of the connecting pipe. When the outer pipe is inserted into the connecting pipe, the outer pipe is pushed to slide. At this time, the transmission roller will slide towards the position of the filter plate under the obstruction of the baffle plate, and drive the rotating ring and scraper to rotate.

[0020] The beneficial effects of this invention are as follows:

[0021] 1. The mold with a simple secondary ejection structure described in this invention uses an ejector roller to eject the third ejector pin under the cold runner, causing the cold runner to detach from the product first. Then, the first and second ejector pins eject the product completely from the rear mold core, ultimately achieving separate ejection of the product and the cold runner. This achieves the effect of secondary ejection without using standard secondary ejector parts. This structure is not only simple and effective, but also reduces processing and production costs, thereby improving production efficiency.

[0022] 2. The mold with a simple secondary ejection structure described in this invention controls the connecting shell to drive the two outer tubes to be inserted into the connecting pipe. At this time, the top pressure block set on the inner wall of the outer tube is inserted into the top pressure groove. Then the top pressure block can contact the top pressure ball and push the top pressure ball upward and slide it into the slot opened in the outer tube. At this time, the connecting pipe and the outer tube can be engaged by the cooperation of the top pressure ball and the slot, which improves the installation efficiency. Attached Figure Description

[0023] The invention will now be further described with reference to the accompanying drawings.

[0024] Figure 1 This is a perspective view of the present invention;

[0025] Figure 2 This is a schematic diagram of the structure of the product in this invention;

[0026] Figure 3 This is a schematic diagram of the front mold core and the rear mold core being joined together in this invention;

[0027] Figure 4 In this invention Figure 3 Enlarged view of point A in the image;

[0028] Figure 5 This is a schematic diagram of the secondary top of the product in this invention;

[0029] Figure 6 In this invention Figure 5 Enlarged view of point B in the image;

[0030] Figure 7 In this invention Figure 5 Enlarged view of point C in the image;

[0031] Figure 8 This is a schematic diagram showing the product fully ejected in this invention;

[0032] Figure 9 This is a schematic diagram of the connecting shell structure in this invention;

[0033] Figure 10 This is a schematic diagram of the structure of plate B in this invention;

[0034] Figure 11 This is a cross-sectional view of the outer connecting pipe in this invention;

[0035] Figure 12 In this invention Figure 11 Enlarged view of point D in the image;

[0036] Figure 13 In this invention Figure 11 Enlarged view of point E in the image;

[0037] Figure 14 In this invention Figure 11 Enlarged view of point F in the image.

[0038] In the diagram: 1. First inlet; 2. First outlet; 3. Plate A; 4. Front mold core; 5. Rear mold core; 6. Plate B; 7. First ejector pin; 71. Second ejector pin; 72. Third ejector pin; 8. Ejector pin fixing plate; 9. Ejector pin base plate; 10. Base plate; 11. Ejector roller; 12. Secondary ejector pin fixing block; 13. Secondary ejector pin pressing block; 14. Cold runner; 15. Product; 16. Scraper; 17. Guide block; 18. Connecting shell; 19. Connecting pipe; 20. Outer pipe; 21. Filter plate; 22. Drive roller; 23. Moving groove; 24. Top pressure groove; 25. Top pressure ball; 26. Connecting groove; 27. Baffle plate; 28. Pressing rod; 29. ​​Top pressure block; 30. Baffle; 31. Slot; 32. Rotary ring; 33. Spiral groove. Detailed Implementation

[0039] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0040] Example 1: As Figures 1 to 8 As shown in the figure, a mold with a simple secondary ejection structure according to an embodiment of the present invention includes a base plate 10, a front mold core 4, a rear mold core 5, an A plate 3, a B plate 6, an ejector pin fixing plate 8, an ejector pin base plate 9, an ejector roller 11, a secondary ejector pin fixing block 12, a secondary ejector pin pressing block 13, a first ejector pin 7, a second ejector pin 71, a third ejector pin 72, a cold runner 14, and a product 15.

[0041] B plate 6 is positioned above base plate 10, A plate 3 is slidably mounted on B plate 6, rear mold core 5 is positioned on B plate 6, front mold core 4 is positioned at one end of A plate 3 near B plate 6, product 15 is located between front mold core 4 and rear mold core 5, and cold runner 14 is located inside rear mold core 5.

[0042] One end of the ejector roller 11 passes through the base plate 10, and the other end is connected to the injection molding machine. The bottom end of the secondary ejector pin block 13 is connected to the top end of the ejector roller 11. The secondary ejector pin fixing block 12 is located above the secondary ejector pin block 13. The secondary ejector pin fixing block 12 and the secondary ejector pin block 13 are connected by bolts and are set between the ejector pin fixing plate 8 and the ejector pin base plate 9. There is a space between the secondary ejector pin fixing block 12 and the ejector pin fixing plate 8. The second ejector pin 71 and the third ejector pin 72 are set on the secondary ejector pin fixing block 12.

[0043] The first ejector pin 7 is mounted on the ejector pin fixing plate 8, and the other end of the first ejector pin 7 is attached to the product 15.

[0044] First, the mold opening action is performed by controlling plate A3 and front mold core 4. Then, the ejector roller 11 pushes the secondary ejector fixing block 12 and secondary ejector pressing block 13 upward under the action of the injection molding machine. Since there is a space between the secondary ejector fixing block 12 and the ejector fixing plate 8, when the ejector roller 11 moves the secondary ejector fixing block 12 and secondary ejector pressing block 13 within this space, the ejector fixing plate 8 and ejector base plate 9 remain stationary. At this time, only the second ejector pin 71 and the third ejector pin 72 remain stationary. During this process, the position of product 15 remains unchanged. Figure 4 As shown, the cold runner 14 detaches from the product 15, allowing it to separate smoothly from the product 15 and achieve the desired effect. Finally, the ejector roller 11 continues to eject, and the product 15 detaches from the mold core 5.

[0045] This project mainly utilizes the secondary ejector pin fixing block 12 and the secondary ejector pin pressing block 13 to achieve the first ejection and first retraction of some of the first ejector pins 7, second ejector pins 71, and third ejector pins 72. After injection molding is completed, under the action of the injection molding machine, the ejector roller 11 first ejects the third ejector pin 72 under the cold runner 14, causing the cold runner 14 to detach from the product 15. Then, the first ejector pins 7 and second ejector pins 71 are ejected, completely ejecting the product 15 from the rear mold core 5. Finally, the product 15 and the cold runner 14 are ejected separately. This structure is not only simple and effective, but also reduces processing and production costs, thereby improving production efficiency and benefiting the company's development and progress.

[0046] Example 2: Figures 9 to 14 As shown in Example 1, another embodiment of the present invention is as follows:

[0047] The B plate 6 is provided with a first inlet 1 and a first outlet 2. Both the first inlet 1 and the first outlet 2 are provided with connecting pipes 19. A connecting shell 18 is provided on one side of the B plate 6. An outer pipe 20 that is inserted into the connecting pipe 19 is fixedly connected inside the connecting shell 18.

[0048] The connecting pipe 19 is provided with a top pressure ball 25, and the connecting pipe 19 is provided with a moving groove 23 for the top pressure ball 25 to slide up and down. A top pressure groove 24 is provided below the moving groove 23.

[0049] The inner wall of the outer pipe 20 is fixedly connected to a top pressure block 29, and the inner wall of the outer pipe 20 is provided with a slot 31 for the top pressure ball 25 to engage.

[0050] By controlling the connecting shell 18, the two outer tubes 20 are driven to be inserted into the connecting tubes 19 in the first inlet 1 and the first outlet 2 respectively. At this time, by inserting the top pressure block 29 set on the inner wall of the outer tube 20 into the top pressure groove 24, the top pressure block 29 can contact the top pressure ball 25 and push the top pressure ball 25 upward and slide it into the slot 31 opened in the outer tube 20. At this time, the connecting tube 19 and the outer tube 20 can be engaged by the cooperation of the top pressure ball 25 and the slot 31.

[0051] A baffle 30 is elastically installed at one end of the top pressure block 29 near the top pressure ball 25. The baffle 30 is elastically installed at the top of the top pressure block 29 via a torsion spring. When the torsion spring releases its elastic potential energy, the baffle 30 is raised upward. When the outer tube 20 is inserted into the connecting tube 19, the baffle 30 can be squeezed to make it horizontal. At the same time, the torsion spring will also store elastic potential energy until the baffle 30 slides to one side of the top pressure ball 25. At this time, the baffle 30 will be raised upward into an inclined state by the torsion spring without being squeezed by the top pressure ball 25. At this time, the baffle 30 will be engaged with the top pressure ball 25. Therefore, pulling the outer tube 20 will not separate it from the connecting tube 19.

[0052] A pressing rod 28 is slidably installed inside the outer pipe 20, and the pressing rod 28 is located above the baffle 30;

[0053] The connecting pipe 19 has a connecting groove 26 inside, which is connected to the top pressure groove 24.

[0054] By pushing the pressing rod 28 downwards, the pressing rod 28 will extend into the connecting groove 26 and press the baffle 30 into a horizontal state. At this time, the outer pipe 20 can be pulled to release the engagement with the connecting pipe 19.

[0055] A filter plate 21 is fixedly installed on the inner wall of the outer pipe 20. A rotating ring 32 is rotatably installed inside the filter plate 21. One end of the rotating ring 32 extends out of the outer wall of the filter plate 21 and is fixedly connected to a scraper 16. One end of the scraper 16 is in contact with the surface of the filter plate 21.

[0056] The filter plate 21 can filter the passing liquid. By controlling the rotation of the rotating ring 32, the scraper 16 can be driven to clean the surface of the filter plate 21.

[0057] A drive roller 22 is slidably installed inside the rotating ring 32. A spiral groove 33 is opened on the outer wall of the drive roller 22. A guide block 17 is fixedly installed on the inner wall of the rotating ring 32. One end of the guide block 17 extends into the interior of the spiral groove 33.

[0058] Since the rotating ring 32 can only rotate inside the filter plate 21, by controlling the transmission roller 22 to slide inside the rotating ring 32, the rotating ring 32 can be rotated inside the filter plate 21 through the cooperation of the guide block 17 and the spiral groove 33, and at the same time, the scraper 16 is driven to clean the surface of the filter plate 21.

[0059] The top surface of the top pressure block 29, which is away from the baffle 30, is inclined, and the inner wall of the connecting pipe 19 is fixedly installed with a baffle plate 27.

[0060] After the outer pipe 20 is inserted into the connecting pipe 19, the drive roller 22 will be in contact with the baffle plate 27. At this time, by pushing the outer pipe 20 to make it continue to slide on the connecting pipe 19, the top pressure ball 25 can slide on the inclined surface set on the top pressure block 29. The top pressure ball 25 will also gradually slide downward inside the moving groove 23. At this time, the drive roller 22 slides towards the position of the filter plate 21 under the obstruction of the baffle plate 27. The movement of the drive roller 22 can drive the rotating ring 32 and the scraper 16 to rotate.

[0061] Working principle: First, the mold opening action is performed by controlling plate A3 and front mold core 4. Then, the ejector roller 11 pushes the secondary ejector fixing block 12 and secondary ejector pressing block 13 upward under the action of the injection molding machine. Since there is space between the secondary ejector fixing block 12 and the ejector fixing plate 8, when the ejector roller 11 moves the secondary ejector fixing block 12 and secondary ejector pressing block 13 within this space, the ejector fixing plate 8 and ejector base plate 9 remain stationary. At this time, only the second ejector 71 and the third ejector 72 remain stationary. During this process, the position of product 15 remains unchanged. Figure 4 As shown, the cold runner 14 detaches from the product 15, allowing it to separate smoothly from the product 15 and achieve the desired effect. Finally, the ejector roller 11 continues to eject, and the product 15 detaches from the mold core 5. This structure is not only simple and effective, but it can also reduce processing and production costs, thereby improving production efficiency and benefiting the company's development and progress.

[0062] By controlling the connecting shell 18, the two outer tubes 20 are driven to be inserted into the connecting tubes 19 in the first inlet 1 and the first outlet 2 respectively. At this time, by inserting the top pressure block 29 set on the inner wall of the outer tube 20 into the top pressure groove 24, the top pressure block 29 can contact the top pressure ball 25 and push the top pressure ball 25 upward and slide it into the slot 31 opened in the outer tube 20. At this time, the connecting tube 19 and the outer tube 20 can be engaged by the cooperation of the top pressure ball 25 and the slot 31.

[0063] After the outer pipe 20 is inserted into the connecting pipe 19, the drive roller 22 will be in contact with the baffle plate 27. At this time, by pushing the outer pipe 20 to make it continue to slide on the connecting pipe 19, the top pressure ball 25 can slide on the inclined surface set on the top pressure block 29. The top pressure ball 25 will also gradually slide downward inside the moving groove 23. At this time, the drive roller 22 slides towards the position of the filter plate 21 under the obstruction of the baffle plate 27. The movement of the drive roller 22 can drive the rotating ring 32 and the scraper 16 to rotate.

[0064] The terms "front," "back," "left," "right," "top," and "bottom" all refer to the figures in the accompanying drawings. Figure 1 Based on the perspective of the observer, the side of the device facing the observer is defined as the front, the left side of the observer is defined as the left, and so on.

[0065] In the description of this invention, it should be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this invention.

[0066] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A mold with a simple secondary ejection structure, characterized in that: Includes base plate (10), front mold core (4), rear mold core (5), A plate (3), B plate (6), ejector pin fixing plate (8), ejector pin base plate (9), ejector roller (11), secondary ejector pin fixing block (12), secondary ejector pin pressure block (13), first ejector pin (7), second ejector pin (71); third ejector pin (72), cold runner (14), and product (15); The B plate (6) is positioned above the base plate (10), the A plate (3) is slidably mounted on the B plate (6), the rear mold core (5) is positioned on the B plate (6), the front mold core (4) is positioned at one end of the A plate (3) near the B plate (6), the product (15) is located between the front mold core (4) and the rear mold core (5), and the cold runner (14) is located inside the rear mold core (5). One end of the ejector roller (11) passes through the base plate (10), and the other end is connected to the injection molding machine. The bottom end of the secondary ejector pin block (13) is connected to the top end of the ejector roller (11). The secondary ejector pin fixing block (12) is located above the secondary ejector pin block (13). The secondary ejector pin fixing block (12) and the secondary ejector pin block (13) are connected by bolts and are set between the ejector pin fixing plate (8) and the ejector pin base plate (9). There is a space between the secondary ejector pin fixing block (12) and the ejector pin fixing plate (8). The second ejector pin (71) and the third ejector pin (72) are set on the secondary ejector pin fixing block (12). The first ejector pin (7) is mounted on the ejector pin fixing plate (8), and the other end of the first ejector pin (7) is attached to the product (15); The B plate (6) is provided with a first inlet (1) and a first outlet (2). Both the first inlet (1) and the first outlet (2) are provided with connecting pipes (19). A connecting shell (18) is provided on one side of the B plate (6). An outer pipe (20) that is inserted into the connecting pipe (19) is fixedly connected inside the connecting shell (18). A filter plate (21) is fixedly installed on the inner wall of the outer pipe (20). A rotating ring (32) is rotatably installed inside the filter plate (21). One end of the rotating ring (32) extends out of the outer wall of the filter plate (21) and is fixedly connected to a scraper (16). One end of the scraper (16) is in contact with the surface of the filter plate (21). A transmission roller (22) is slidably installed inside the rotating ring (32). A spiral groove (33) is opened on the outer wall of the transmission roller (22). A guide block (17) is fixedly installed on the inner wall of the rotating ring (32). One end of the guide block (17) extends into the interior of the spiral groove (33).

2. The mold with a simple secondary ejection structure according to claim 1, characterized in that: The connecting pipe (19) is provided with a top pressure ball (25) inside, and a moving groove (23) for the top pressure ball (25) to slide up and down is provided inside the connecting pipe (19). A top pressure groove (24) is provided below the moving groove (23). The inner wall of the outer tube (20) is fixedly connected to a top pressure block (29), and the inner wall of the outer tube (20) is provided with a slot (31) for the top pressure ball (25) to engage.

3. A mold with a simple secondary ejection structure according to claim 2, characterized in that: A baffle (30) is elastically installed at one end of the top pressure block (29) near the top pressure ball (25).

4. A mold with a simple secondary ejection structure according to claim 3, characterized in that: A pressing rod (28) is slidably installed inside the outer tube (20), and the pressing rod (28) is located above the baffle (30); The connecting pipe (19) has a connecting groove (26) inside, which is connected to the top pressure groove (24).

5. A mold with a simple secondary ejection structure according to claim 4, characterized in that: The top surface of the top pressure block (29) away from the baffle (30) is inclined, and the inner wall of the connecting pipe (19) is fixedly installed with a baffle plate (27).

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