Novel multi-cavity thread demolding plastic mold structure

Abstract

The invention is suitable for the technical field of plastic mold structures, and provides a novel multi-cavity thread demolding plastic mold structure which comprises a first mold part and a second mold part, and the first mold part and the second mold part are combined to form a thread plastic part mold cavity. The upper portion of one end of the inner side face of the first mold part and the lower portion of the other end of the inner side face of the first mold part are each provided with a transmission plate moving in the vertical direction, and the two sides of the first mold part are each provided with a transmission structure for driving the transmission plate to ascend and descend when the first mold part moves in the horizontal direction. According to the novel multi-cavity thread demolding plastic mold structure, the mode that a front mold stripper plate is used for opening a mold to drive a first driving gear, the first driving gear drives a transmission plate to ascend and descend and drives a gear set for thread demolding is used for replacing a traditional automatic thread twisting connection mode of a motor with a chain wheel and a chain or an automatic thread twisting connection mode of an oil cylinder gear and a rack, and mold assembly is more convenient and faster; the thread stripping action is completed through the mold opening action, and the production period is shortened.

Description

Technical Field

[0001] The invention belongs to the technical field of plastic mold structures, and in particular relates to a novel multi-cavity thread-removing plastic mold structure. Background Art

[0002] Threaded plastic mold is a type of plastic mold, mainly used to produce plastic products with threaded structure. Threaded plastic mold is mainly divided into external thread mold and internal thread mold according to the type of thread. External thread is usually used to connect and fix the external parts of the mold, such as mold base, template, etc., with the ability to withstand tension and pressure, can ensure the stability and reliability of the mold; while internal thread is mainly used to connect and fix the internal parts of the mold, such as the nozzle of the injection molding machine, mold core, etc., can provide good sealing performance to prevent plastic leakage during the injection molding process.

[0003] Chinese patent CN119078049A discloses a servo motor threading mold structure. This technical solution, by adopting a servo motor to thread, can effectively reduce labor costs and stably guarantee the product qualification rate in the subsequent production process of the mold. Specifically, the mold structure includes a gear installed on the servo motor, which is connected to the transmission structure on the mold through a chain. When the mold is opened during the production process, the started servo motor will drive the transmission mechanism on the mold, and then unscrew the product thread to achieve the threading function; However, the existing thread removal mechanism motor with sprocket chain automatic threading or cylinder gear rack automatic threading structure requires the design of gear balance power to drive the gear group, the mold cavity arrangement rule is fixed, and multi-cavity molds cannot be realized, the production capacity is low, the product cost is high, and an external motor or cylinder is required. The mold assembly structure is complex, the external components are easily damaged, the cylinder is prone to oil leakage, and the mold is frequently repaired, which wastes costs. The motor or cylinder threading transmission action needs to be used after the mold is opened. The production molding cycle is long, and the mold opening stroke is long, the efficiency is low, and the generated screw thread will be affected by external force interference and affect the appearance. The screw thread cannot automatically reset to a fixed position each time, and the integrity of the product thread cannot be guaranteed. Summary of the invention

[0004] The present invention provides a novel multi-cavity thread-removing plastic mold structure, aiming to solve the problem that the existing thread-removing mechanism needs to drive the gear set by designing a gear balance power, the mold cavity arrangement rule is fixed, and multi-cavity production cannot be realized, thereby reducing the production and processing efficiency.

[0005] The present invention is implemented as follows: a multi-cavity novel thread-removing plastic mold structure comprises a first mold piece and a second mold piece, wherein the first mold piece and the second mold piece are combined to form a threaded plastic part mold cavity; A transmission plate that moves in the vertical direction is disposed at the upper part of one end and the lower part of the other end of the inner side surface of the first mold member, and a transmission structure that drives the transmission plate to move up and down when the first mold member moves in the horizontal direction is disposed on both sides of the first mold member; The inner side surface of the first mold piece is fixedly connected with a support plate, and the inner side surface of the support plate is rotatably connected with a plurality of couplings. A plurality of bronze sleeves are arranged in the first mold piece, and the plurality of bronze sleeves correspond to the plurality of couplings one by one. A tooth shaft is rotatably arranged on the bronze sleeve, the inner end of the tooth shaft extends to the inner cavity of the threaded plastic part mold cavity and is provided with a threaded end, the outer end of the tooth shaft is connected to the corresponding coupling, and a driven structure is arranged on the support plate to drive several couplings to rotate when the transmission plate moves up and down.

[0006] Preferably, the transmission structure includes two injection nozzles and two first rack plates, the two injection nozzles are respectively arranged on one end face and the other end face of the second mold part, the two first rack plates are respectively fixedly connected to one end face and the other end face of the first mold part, the other end of the first rack plate is pulled through the interior of the injection nozzle at the same end, the interior of the injection nozzle is rotatably connected with a transmission shaft, the surface of the transmission shaft is fixedly connected with a first driving gear meshing with the first rack plate at the same end, the other end of the transmission shaft is rotatably extended to the interior of the first mold part, and is fixedly connected with a first transmission gear, and the surface of the transmission plate is provided with a second rack plate meshing with the first transmission gear at the same end.

[0007] Preferably, the first mold part is provided with an injection tube connected with the mold cavity of the threaded plastic part, and the outer side surface of the first mold part is provided with an injection nozzle adapted to the injection tube.

[0008] Preferably, the driven structure includes two second drive gears, a plurality of second transmission gears and a ring gear, the ring gear is rotatably arranged on the inner side surface of the support plate, the two second drive gears are respectively fixedly connected to the surfaces of the couplings located at one end and the other end, and mesh with the ring gears, the surface of the transmission plate is provided with a third rack plate meshing with the second drive gears at the same end, the plurality of second transmission gears correspond one by one to the plurality of couplings at the upper and lower parts, respectively, and the coupling is fixedly connected to the surface of the second transmission gear and meshes with the ring gear.

[0009] Preferably, a plurality of support columns are vertically fixedly connected to the bottom of the first mold member and the second mold member, and mounting openings are provided at the bottom ends of the support columns. The height of the support columns is higher than the telescopic length of the transmission plate located at the bottom.

[0010] Preferably, a plurality of positioning posts are fixedly connected to the inner side surface of the first mold component, and a plurality of positioning seats adapted to the positioning posts are fixedly connected to the inner side surface of the second mold component.

[0011] Preferably, a buckle machine is provided between the first mold part and the second mold part.

[0012] Preferably, a plurality of couplings are arranged in a circular manner and evenly spaced apart along the surface of the support plate.

[0013] Preferably, a second mold core is provided on the inner side surface of the first mold member, the bronze sleeve is fixedly connected to the second mold core, a first mold core matched with the second mold core is provided on the inner side surface of the second mold member, the first mold core and the second mold core, and the threaded plastic part mold cavity are formed by combining the first mold core and the second mold core, and a guide plate matched with the threaded plastic part mold cavity is embedded in the inner side surface of the first mold core.

[0014] Beneficial Effects Compared with the prior art, the beneficial effects of the present invention are as follows: a new multi-cavity thread-removing plastic mold structure of the present invention, by using the front mold gate plate to open the mold to drive the first drive gear, the first drive gear drives the transmission plate to rise and fall, and drives the gear set to remove the threads, instead of the traditional motor belt sprocket chain automatic threading or cylinder gear rack automatic threading connection method, the mold assembly is more convenient and quick, the mold opening action is used to complete the thread removal action, shorten the production cycle, effectively reduce the product production cost, can realize the product multi-cavity ranking, increase the mold service life, effectively reduce the mold manufacturing and maintenance costs, the screw thread automatically resets to a fixed position, ensures the consistency of the product, and improves the product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 It is a schematic structural diagram of the transmission shaft and the first driving gear in the present invention; Figure 3 It is a structural schematic diagram of the positioning column and the positioning seat in the present invention; Figure 4 It is a structural schematic diagram of the transmission shaft and the first transmission gear in the present invention; Figure 5 It is a structural schematic diagram of the transmission structure in the present invention; Figure 6 It is a schematic diagram of the structure of the threaded shaft and the threaded end in the present invention; Figure 7 It is a structural schematic diagram of the transmission plate and the first mold member in the present invention; Figure 8 It is a schematic diagram of the structure of the injection molding tube and the coupling in the present invention.

[0016] In the figure: 1. first mold part; 2. second mold part; 3. support column; 4. positioning column; 5. positioning seat; 6. first mold core; 7. second mold core; 8. guide plate; 9. bronze sleeve; 10. tooth shaft; 11. threaded end; 12. injection tube; 13. injection nozzle; 14. transmission shaft; 15. first drive gear; 16. first rack plate; 17. first transmission gear; 18. transmission plate; 19. second rack plate; 20. third rack plate; 21. ring gear; 22. support plate; 23. coupling; 24. second drive gear; 25. second transmission gear; 26. buckle machine. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0018] See also Figure 1-8 , the present invention provides a technical solution: a multi-cavity new type thread-removing plastic mold structure, comprising a first mold part 1 and a second mold part 2, the first mold part 1 and the second mold part 2 are combined to form a threaded plastic part mold cavity; A transmission plate 18 that moves in the vertical direction is disposed at the upper part of one end and the lower part of the other end of the inner side surface of the first mold member 1, and a transmission structure that drives the transmission plate 18 to move up and down when the first mold member 1 moves in the horizontal direction is disposed on both sides of the first mold member 1; The inner side of the first mold member 1 is fixedly connected with a support plate 22, and the inner side of the support plate 22 is rotatably connected with a plurality of couplings 23. A plurality of bronze sleeves 9 are arranged in the first mold member 1, and the plurality of bronze sleeves 9 correspond to the plurality of couplings 23 one by one. A toothed shaft 10 is rotatably provided on the bronze sleeve 9, the inner end of the toothed shaft 10 extends to the inner cavity of the threaded plastic part mold cavity and is provided with a threaded end 11, the outer end of the toothed shaft 10 is connected to the corresponding coupling 23, and a driven structure is provided on the support plate 22 for driving several couplings 23 to rotate when the transmission plate 18 moves up and down.

[0019] A buckle machine 26 is arranged between the first mold part 1 and the second mold part 2, a second mold core 7 is arranged on the inner side surface of the first mold part 1, a bronze sleeve 9 is fixedly connected to the second mold core 7, a first mold core 6 adapted to the second mold core 7 is arranged on the inner side surface of the second mold part 2, the first mold core 6 and the second mold core 7, the threaded plastic part mold cavity is formed by the combination of the first mold core 6 and the second mold core 7, a guide plate 8 adapted to the threaded plastic part mold cavity is embedded in the inner side surface of the first mold core 6, and a plurality of couplings 23 are evenly distributed and arranged in a ring shape along the surface of the support plate 22.

[0020] The locking machine 26 is convenient for locking and fixing the first mold part 1 and the second mold part 2 after the mold is closed, and the guide plate 8 is convenient for evenly diffusing and guiding the raw materials to the threaded plastic part mold cavity during the injection molding process.

[0021] The front mold gate plate is used to open the mold to drive the first drive gear 15, and the first drive gear 15 drives the transmission plate 18 to rise and fall, driving the gear set to remove the thread, replacing the traditional motor belt sprocket chain automatic threading or cylinder gear rack automatic threading connection method, and the mold assembly is more convenient and quick.

[0022] The screw thread removal action is completed by the mold opening action, which shortens the production cycle and effectively reduces the production cost of the product. It can realize multi-hole arrangement of products, increase the service life of the mold, and effectively reduce the manufacturing and maintenance costs of the mold. The screw thread automatically resets to a fixed position to ensure the consistency of the product and improve the product quality.

[0023] Furthermore, the transmission structure includes two injection nozzles 13 and two first rack plates 16. The two injection nozzles 13 are respectively arranged on one end face and the other end face of the second mold part 2. The two first rack plates 16 are respectively fixedly connected to one end face and the other end face of the first mold part 1. The other end of the first rack plate 16 is pulled through the interior of the injection nozzle 13 at the same end.

[0024] The injection nozzle 13 is internally rotatably connected to a transmission shaft 14, and the surface of the transmission shaft 14 is fixedly connected to a first driving gear 15 meshing with a first rack plate 16 at the same end. The other end of the transmission shaft 14 rotates and extends to the interior of the first mold part 1, and is fixedly connected to a first transmission gear 17. The surface of the transmission plate 18 is provided with a second rack plate 19 meshing with the first transmission gear 17 at the same end.

[0025] In this embodiment, during the opening movement of the first mold part 1, the first rack plate 16 is driven to move in the horizontal direction, and then the transmission shaft 14 is driven to rotate through the transmission of the first driving gear 15. During the rotation of the transmission shaft 14, the first transmission gear 17 is driven to rotate, and then the transmission of the second rack plate 19 is used to drive the transmission plate 18 to move up and down.

[0026] Furthermore, an injection tube 12 communicating with the mold cavity of the threaded plastic component is disposed on the first mold component 1 , and an injection nozzle 13 adapted to the injection tube 12 is disposed on the outer side surface of the first mold component 1 .

[0027] Furthermore, the driven structure includes two second drive gears 24, a plurality of second transmission gears 25 and a ring gear 21. The ring gear 21 is rotatably arranged on the inner side of the support plate 22. The two second drive gears 24 are respectively fixedly connected to the surfaces of the couplings 23 located at one end and the other end, and mesh with the ring gear 21.

[0028] The surface of the transmission plate 18 is provided with a third rack plate 20 meshing with the second driving gear 24 at the same end. Multiple second transmission gears 25 correspond one by one to multiple couplings 23 at the upper and lower parts respectively. The couplings 23 are fixedly connected to the surface of the second transmission gear 25 and meshed with the ring gear 21.

[0029] In this embodiment, the transmission of the third rack plate 20 can drive the second drive gear 24 to rotate during the lifting and moving process of the transmission plate 18, and the transmission of the second drive gear 24 can further drive the ring gear 21 to rotate, and cooperate with the driven second transmission gears 25 to make the multiple couplings 23 rotate, and then during the demolding process, drive the tooth shaft 10 to rotate, so that the threaded end 11 can be rotated and threaded out of the plastic part.

[0030] Furthermore, a plurality of support columns 3 are vertically fixedly connected to the bottom of the first mold member 1 and the second mold member 2 . A mounting opening is provided at the bottom end of the support column 3 . The height of the support column 3 is higher than the telescopic length of the lower transmission plate 18 .

[0031] Furthermore, a plurality of positioning posts 4 are fixedly connected to the inner side surface of the first mold component 1 , and a plurality of positioning seats 5 adapted to the positioning posts 4 are fixedly connected to the inner side surface of the second mold component 2 .

[0032] In this embodiment, during the process of closing the first mold part 1 and the second mold part 2, the positioning column 4 is embedded in the interior of the positioning seat 5 to position the first mold part 1 and the second mold part 2 to improve the stability of the closing mold.

[0033] Working principle and use process of the present invention: After the present invention is installed, during the opening and moving process of the first mold part 1, the first rack plate 16 is driven to move in the horizontal direction, and then the transmission of the first driving gear 15 drives the transmission shaft 14 to rotate. During the rotation of the transmission shaft 14, the first transmission gear 17 is driven to rotate, and then the transmission of the second rack plate 19 is utilized to drive the transmission plate 18 to move up and down. During the lifting and moving process of the transmission plate 18, the transmission of the third rack plate 20 is utilized to drive the second driving gear 24 to rotate, and the transmission of the second driving gear 24 is utilized to drive the ring gear 21 to rotate, and cooperate with the driven second transmission gears 25 to make the multiple couplings 23 rotate, and then during the demolding process, the tooth shaft 10 is driven to rotate, so that the threaded end 11 is rotated and unthreaded from the plastic part, and the unthreading action is completed by the mold opening action, thereby shortening the production cycle, effectively reducing the product production cost, realizing multi-hole arrangement of products, and improving production and processing efficiency.

[0034] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A novel multi-cavity thread-removing plastic mold structure, comprising a first mold part (1) and a second mold part (2), characterized in that: The first mold part (1) and the second mold part (2) are combined to form a threaded plastic part mold cavity; A transmission plate (18) that moves in a vertical direction is provided at the upper part of one end and the lower part of the other end of the inner side surface of the first mold member (1), and a transmission structure that drives the transmission plate (18) to move up and down when the first mold member (1) moves in a horizontal direction is provided on both sides of the first mold member (1); The inner side surface of the first mold member (1) is fixedly connected to a support plate (22), and the inner side surface of the support plate (22) is rotatably connected to a plurality of couplings (23). A plurality of bronze sleeves (9) are arranged in the first mold member (1), and the plurality of bronze sleeves (9) correspond one to one to the plurality of couplings (23); A toothed shaft (10) is rotatably arranged on the bronze sleeve (9), the inner end of the toothed shaft (10) extends into the inner cavity of the threaded plastic part mold cavity and is provided with a threaded end (11), the outer end of the toothed shaft (10) is connected to the corresponding coupling (23), and a driven structure is provided on the support plate (22) for driving a plurality of couplings (23) to rotate when the transmission plate (18) moves up and down.

2. A multi-cavity new type thread-removing plastic mold structure as claimed in claim 1, characterized in that: The transmission structure comprises two injection nozzles (13) and two first rack plates (16); the two injection nozzles (13) are respectively arranged at one end face and the other end face of the second mold part (2); the two first rack plates (16) are respectively fixedly connected to one end face and the other end face of the first mold part (1); the other end of the first rack plate (16) is pulled through the interior of the injection nozzle (13) at the same end; the interior of the injection nozzle (13) is rotatably connected to a transmission shaft (14); the surface of the transmission shaft (14) is fixedly connected to a first driving gear (15) meshing with the first rack plate (16) at the same end; the other end of the transmission shaft (14) is rotatably extended to the interior of the first mold part (1) and is fixedly connected to a first transmission gear (17); the surface of the transmission plate (18) is provided with a second rack plate (19) meshing with the first transmission gear (17) at the same end.

3. A multi-cavity new type thread-removing plastic mold structure as claimed in claim 1, characterized in that: The first mold part (1) is provided with an injection tube (12) connected to the mold cavity of the threaded plastic part, and the outer side surface of the first mold part (1) is provided with an injection nozzle (13) adapted to the injection tube (12).

4. A multi-cavity new type thread-removing plastic mold structure as claimed in claim 1, characterized in that: The driven structure comprises two second drive gears (24), a plurality of second transmission gears (25) and a ring gear (21); the ring gear (21) is rotatably arranged on the inner side surface of the support plate (22); the two second drive gears (24) are respectively fixedly connected to the surfaces of the couplings (23) located at one end and the other end, and mesh with the ring gear (21); the surface of the transmission plate (18) is provided with a third rack plate (20) meshing with the second drive gears (24) at the same end; the plurality of second transmission gears (25) correspond one by one to the plurality of couplings (23) at the upper part and the lower part, respectively; the couplings (23) are fixedly connected to the surfaces of the second transmission gears (25), and mesh with the ring gear (21).

5. A multi-cavity new type thread-removing plastic mold structure as claimed in claim 1, characterized in that: A plurality of support columns (3) are vertically fixedly connected to the bottom of the first mold part (1) and the second mold part (2), and a mounting opening is provided at the bottom end of the support column (3). The height of the support column (3) is higher than the telescopic length of the transmission plate (18) located at the bottom.

6. A multi-cavity new type thread-removing plastic mold structure as claimed in claim 1, characterized in that: The inner side surface of the first mold component (1) is fixedly connected to a plurality of positioning columns (4), and the inner side surface of the second mold component (2) is fixedly connected to a plurality of positioning seats (5) adapted to the positioning columns (4).

7. A multi-cavity new type thread-removing plastic mold structure as claimed in claim 1, characterized in that: A buckle machine (26) is provided between the first mold part (1) and the second mold part (2).

8. A multi-cavity new type thread-removing plastic mold structure as claimed in claim 1, characterized in that: The plurality of couplings (23) are arranged in a circular manner and evenly spaced apart along the surface of the support plate (22).

9. A multi-cavity new type thread-removing plastic mold structure as claimed in claim 1, characterized in that: The inner side surface of the first mold part (1) is provided with a second mold core (7), the bronze sleeve (9) is fixedly connected to the second mold core (7), the inner side surface of the second mold part (2) is provided with a first mold core (6) adapted to the second mold core (7), the first mold core (6) and the second mold core (7), the threaded plastic part mold cavity is formed by the combination of the first mold core (6) and the second mold core (7), and the inner side surface of the first mold core (6) is embedded with a guide plate (8) adapted to the threaded plastic part mold cavity.

Images