Injection mold demolding ejection structure

Abstract

The utility model discloses a demoulding ejection structure of an injection mould, which comprises a lower mould and an injection mould cavity arranged at the top of the lower mould, the bottom of the lower mould is fixedly provided with a mould seat, the bottom of the injection mould cavity is provided with four T-shaped ejector rod grooves, the top of the mould seat is provided with a transmission cavity communicated with the bottoms of the four T-shaped ejector rod grooves, and the transmission cavity is communicated with the transmission cavity. T-shaped ejector rods capable of rotating and being adjusted in a lifting mode are installed between the four T-shaped ejector rod grooves and the interior of the transmission cavity, and a forward and reverse rotation motor for conducting transmission adjustment on the four T-shaped ejector rods is installed on one side of the mold base. The demolding and ejecting structure of the injection mold has a rotary jacking function, and can rotate before ejecting an injection molding part, so that the top of the ejecting structure is separated from the injection molding part, and then the injection molding part is ejected out of a mold cavity through jacking adjustment, so that the injection molding part is conveniently demolded and taken.

Description

Technical Field

[0001] This utility model belongs to the field of mold demolding technology, specifically a demolding and ejection structure for injection molds. Background Technology

[0002] Injection molds are tools used for plastic injection molding, usually made of steel or aluminum. Their main components include the mold cavity, core, gate, cooling system, and fixing mechanism. During injection molding, molten plastic is injected into the mold cavity through a nozzle, and solidifies after cooling. Injection molds offer high precision, repeatability, and efficiency, and are widely used in the production of various plastic parts in the automotive, electronics, and home appliance industries. After processing, the injection mold requires demolding. Most existing demolding structures use an ejector mechanism, but after the molded part is ejected from the mold cavity, it remains attached to the ejector structure, requiring manual demolding again. Therefore, improvements are needed to address these issues. Utility Model Content

[0003] To achieve the above objectives, this utility model provides the following technical solution: an injection mold ejection structure, comprising a lower mold and an injection mold cavity opened on the top of the lower mold, a mold base fixedly installed at the bottom of the lower mold, four T-shaped ejector slots opened at the bottom of the injection mold cavity, a transmission cavity opened at the top of the mold base communicating with the bottom of the four T-shaped ejector slots, a rotatable and height-adjustable T-shaped ejector rod installed between the four T-shaped ejector slots and the interior of the transmission cavity, and a forward and reverse motor for driving and adjusting the four T-shaped ejector rods installed on one side of the mold base.

[0004] Preferably, each of the four T-shaped ejector rods has a toothed post fixedly installed at the bottom inside the transmission cavity, and each of the four toothed posts has an insertion hole at its bottom. Four pins that are movably inserted into the four insertion holes are fixedly installed at the bottom of the transmission cavity, so that the T-shaped ejector rods can be effectively rotated.

[0005] Preferably, four drive shafts are rotatably mounted at the bottom of the transmission cavity, and drive gears are fixedly mounted on the top of each of the four drive shafts. The four drive gears are respectively meshed with four toothed columns, and worm gears are fixedly mounted on the lower part of each of the four drive shafts.

[0006] Preferably, two double-segment worm gears are rotatably mounted on the lower part of the transmission cavity. The two double-segment worm gears are respectively connected to four worm wheels on both sides. One end of each double-segment worm gear extends to the outside of one side of the mold base. A sprocket is fixedly mounted on the outer end of each double-segment worm gear located on the outside of the mold base. A chain is installed between the two sprockets. An adjusting gear A is fixedly mounted on the shaft of one of the sprockets, thereby enabling the four T-shaped ejector rods to be synchronously rotated and adjusted.

[0007] Preferably, a disc is fixedly installed at the output end of the reversible motor, and arc-shaped teeth are fixedly installed on the circumferential surface of the disc, which intermittently transmit power to the adjusting gear A.

[0008] Preferably, a transmission rod is rotatably mounted in the middle of the transmission cavity, one end of the transmission rod extends to the outside of one side of the mold base and is fixedly mounted with an adjusting gear B that intermittently transmits power with the arc-shaped teeth, and an eccentric wheel is fixedly mounted at the end of the transmission rod located inside the transmission cavity.

[0009] Preferably, bearings are fixedly installed on the lower part of the four T-shaped ejector rods inside the transmission cavity. A connecting plate is fixedly installed between the surfaces of the four bearings, and an eccentric wheel is located at the bottom of the connecting plate, thereby enabling effective lifting operation of the four T-shaped ejector rods.

[0010] Compared with the prior art, the beneficial effects of this utility model are as follows: The ejection structure of this injection mold has a rotation lifting function, which can rotate before ejecting the injection molded part, so that the top of the ejection structure is separated from the injection molded part first, and then the injection molded part is ejected from the mold cavity by lifting adjustment, which facilitates the demolding and removal of the injection molded part. At the same time, the ejection structure of this injection mold is simple in design, convenient and easy to use, and stable and reliable in operation and demolding. Its performance can meet the demolding requirements of injection molds. Attached Figure Description

[0011] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.

[0012] In the attached diagram:

[0013] Figure 1 This is a cross-sectional view of the ejection structure of the injection mold of this utility model;

[0014] Figure 2 This utility model Figure 1 Schematic diagram of local structure Figure 1 ;

[0015] Figure 3 This utility model Figure 1 Schematic diagram of local structure Figure 2 ;

[0016] In the diagram: 1. Lower mold; 2. Injection mold cavity; 3. Mold base; 4. T-shaped ejector slot; 5. Transmission cavity; 6. T-shaped ejector rod; 7. Forward and reverse motor; 8. Gear column; 9. Pin; 10. Transmission shaft; 11. Transmission gear; 12. Worm gear; 13. Double-stage worm; 14. Sprocket; 15. Chain; 16. Adjusting gear A; 17. Disc; 18. Arc-shaped tooth; 19. Transmission rod; 20. Adjusting gear B; 21. Eccentric wheel; 22. Bearing; 23. Connecting plate. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0018] Depend on Figures 1 to 3 The present invention includes a lower mold 1 and an injection mold cavity 2 formed on the top of the lower mold 1. A mold base 3 is fixedly installed on the bottom of the lower mold 1. Four T-shaped ejector grooves 4 are formed on the bottom of the injection mold cavity 2. A transmission cavity 5 is formed on the top of the mold base 3, which communicates with the bottom of the four T-shaped ejector grooves 4. T-shaped ejector rods 6 that can be rotated and raised and lowered are installed between the interior of the four T-shaped ejector grooves 4 and the transmission cavity 5. A forward and reverse motor 7 for driving and adjusting the four T-shaped ejector rods 6 is installed on one side of the mold base 3.

[0019] Four T-shaped ejector rods 6 are fixedly mounted with toothed rods 8 at their bottom inside the transmission cavity 5. Each toothed rod 8 has a hole at its bottom. Four pins 9 are fixedly mounted at the bottom of the transmission cavity 5 and are movably inserted into the four holes, so that the T-shaped ejector rods 6 can rotate effectively. Four transmission shafts 10 are rotatably mounted at the bottom of the transmission cavity 5. Each of the four transmission shafts 10 has a transmission gear 11 fixedly mounted on its top. The four transmission gears 11 are respectively meshed with the four toothed rods 8. Worm gears 12 are fixedly mounted at the bottom of each of the four transmission shafts 10.

[0020] Two double-segment worm gears 13 are rotatably mounted on the lower part of the transmission cavity 5. The two sides of the two double-segment worm gears 13 are respectively connected to four worm wheels 12. One end of each double-segment worm gear 13 extends to the outside of one side of the mold base 3. A sprocket 14 is fixedly mounted on the end of each double-segment worm gear 13 located outside the mold base 3. A chain 15 is installed between the two sprockets 14. An adjusting gear A16 is fixedly mounted at the shaft of one of the sprockets 14, so as to effectively adjust the synchronous rotation of the four T-shaped ejector rods 6. A disc 17 is fixedly mounted on the output end of the forward and reverse motor 7. Arc-shaped teeth 18 are fixedly mounted on the circumference of the disc 17. The arc-shaped teeth 18 and the adjusting gear A16 are intermittently driven.

[0021] When the forward and reverse motor 7 starts, the disc 17 drives the arc-shaped gear 18 to rotate. The rotation of the arc-shaped gear 18 first drives the adjusting gear A16 to rotate. The rotation of the adjusting gear A16 drives the two double-segment worm gears 13 to rotate synchronously through the two sprockets 14 and the chain 15. The rotation of the two double-segment worm gears 13 drives the four worm wheels 12, which in turn drives the four transmission shafts 10 to drive the four transmission gears 11 to rotate. The rotation of the four transmission gears 11 drives the four gear columns 8, which in turn drives the four T-shaped ejector rods 6 to rotate through the four bearings 22, thereby separating the four T-shaped ejector rods 6 from the injection molded parts inside the injection mold cavity 2.

[0022] A transmission rod 19 is rotatably mounted in the middle of the transmission cavity 5. One end of the transmission rod 19 extends to the outside of one side of the mold base 3 and is fixedly mounted with an adjusting gear B20 that intermittently transmits power with the arc-shaped teeth 18. An eccentric wheel 21 is fixedly mounted at the end of the transmission rod 19 inside the transmission cavity 5. Bearings 22 are fixedly mounted on the lower part of the four T-shaped ejector rods 6 inside the transmission cavity 5. A connecting plate 23 is fixedly mounted between the surfaces of the four bearings 22. The eccentric wheel 21 is located at the bottom of the connecting plate 23, thereby enabling effective lifting operation of the four T-shaped ejector rods 6.

[0023] After the four T-shaped ejector rods 6 rotate and separate from the injection molded part inside the injection mold cavity 2, the rotating arc-shaped teeth 18 will separate from the adjusting gear A16 and drive the adjusting gear B20 to rotate. The rotation of the adjusting gear B20 will drive the eccentric wheel 21 to rotate through the transmission rod 19. The rotation of the eccentric wheel 21 will push the connecting plate 23 to move upward. The upward movement of the connecting plate 23 will drive the four T-shaped ejector rods 6 to move upward through the four bearings 22. The upward movement of the four T-shaped ejector rods 6 will eject the injection molded part inside the injection mold cavity 2 and demold it.

[0024] The upward movement of the four T-shaped ejector rods 6 will cause the four toothed columns 8 to move upward and maintain meshing with the four transmission gears 11.

[0025] This injection mold ejection structure features a rotating lifting function, which allows it to rotate before ejecting the molded part. This separation of the top of the ejection structure from the molded part allows the part to be ejected from the mold cavity via lifting adjustment, facilitating demolding and removal. Furthermore, this ejection structure is simple in design, convenient to use, and offers stable and reliable operation and demolding. Its performance meets the requirements for demolding injection molds.

[0026] The above embodiments are only for illustrating the technical concept and features of this utility model. Their purpose is to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be used to limit the protection scope of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the protection scope of this utility model.

Claims

1. A demoulding ejection structure of an injection mould, comprising a lower mould (1) and an injection mould cavity (2) opened at the top of the lower mould (1), characterized in that: The bottom of the lower mold (1) is fixedly provided with a mold base (3), the bottom of the injection mold cavity (2) is provided with four T-shaped ejector pin grooves (4), the top of the mold base (3) is provided with a transmission cavity (5) in communication with the bottoms of the four T-shaped ejector pin grooves (4), rotatable and adjustable T-shaped ejector rods (6) are arranged between the four T-shaped ejector pin grooves (4) and the inside of the transmission cavity (5), and a reversible motor (7) is arranged on one side of the mold base (3) and drives and adjusts the four T-shaped ejector rods (6).

2. A mold ejector structure for an injection mold as defined in claim 1, wherein: The bottoms of the four T-shaped ejector rods (6) located in the inside of the transmission cavity (5) are fixedly provided with tooth columns (8), the bottoms of the four tooth columns (8) are provided with insertion holes, and the bottom of the transmission cavity (5) is fixedly provided with four insertion pins (9) movably inserted into the four insertion holes.

3. A mold ejector structure for an injection mold as defined in claim 2, wherein: The bottom of the transmission cavity (5) is rotatably provided with four transmission shafts (10), the tops of the four transmission shafts (10) are fixedly provided with transmission gears (11), the four transmission gears (11) are respectively connected with the four tooth columns (8) in meshing mode, and the lower portions of the four transmission shafts (10) are fixedly provided with worm gears (12).

4. A mold ejector structure for an injection mold as defined in claim 3, wherein: The lower portion of the transmission cavity (5) is rotatably provided with two double-section worm gears (13), the two sides of the two double-section worm gears (13) are respectively connected with the four worm gears (12) in meshing mode, one end of each of the two double-section worm gears (13) extends to one side of the mold base (3), the end portions of the two double-section worm gears (13) located outside the mold base (3) are fixedly provided with sprockets (14), a chain (15) is arranged between the two sprockets (14), and the shaft center of one of the sprockets (14) is fixedly provided with an adjusting gear A (16).

5. A mold ejector structure for an injection mold as defined in claim 4, wherein: The output end of the reversible motor (7) is fixedly provided with a disc (17), the circumferential surface of the disc (17) is fixedly provided with an arc-shaped tooth (18), and the arc-shaped tooth (18) is intermittently connected with the adjusting gear A (16) in transmission mode.

6. A mold ejector structure for an injection mold as defined in claim 5, wherein: The middle portion of the transmission cavity (5) is rotatably provided with a transmission rod (19), one end of the transmission rod (19) extends to one side of the mold base (3) and is fixedly provided with an adjusting gear B (20) intermittently connected with the arc-shaped tooth (18) in transmission mode, and the end portion of the transmission rod (19) located in the inside of the transmission cavity (5) is fixedly provided with an eccentric wheel (21).

7. A mold ejector structure for an injection mold as defined in claim 6, wherein: The lower portions of the four T-shaped ejector rods (6) located in the inside of the transmission cavity (5) are fixedly provided with bearings (22), and the surfaces of the four bearings (22) are fixedly provided with a connecting plate (23), and the eccentric wheel (21) is located at the bottom of the connecting plate (23).

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