Front mold servo twisting mechanism

Abstract

The utility model relates to the technical field of die thread twisting, in particular to a front die servo thread twisting mechanism which comprises a front die plate, a base plate, a bottom plate and a transmission assembly, the transmission assembly is arranged on the top face of the bottom plate and comprises a transmission chain wheel, an installation transmission shaft and a belt rotation transmission shaft, and the installation transmission shaft and the belt rotation transmission shaft are both installed between the base plate and the front die plate. A supporting shaft is arranged on the bottom face of the bottom plate, the supporting shaft penetrates and extends in the direction of the front mold plate, a first gear is installed on the supporting shaft through a shaft sleeve, the shaft sleeve extends in the direction of the transmission chain wheel, the supporting shaft is connected with the shaft sleeve, and an injection molding hole is formed in the middle of the supporting shaft. The rotatably connected shaft sleeve can ensure that the injection molding hole is not influenced by the rotation of the rotating chain wheel and the first gear, the injection molding stability is ensured, meanwhile, the thread twisting structure is arranged in the front mold, and meanwhile, the front mold is usually used as a static mold when the mold is used, so that the high-precision thread twisting function is achieved when the mold is used.

Description

Technical Field

[0001] The utility model relates to the technical field of die threading, in particular to a front mold servo threading mechanism. Background Art

[0002] A die threading mechanism is a die structure specifically used to eject plastic products with threaded features. This mechanism allows the die to rotate the threaded part during the demolding process so that the product can be smoothly separated from the die without damaging the thread.

[0003] The threading mechanism usually includes a rotating mechanism, which can be driven by hydraulic pressure, pneumatic pressure or mechanical means. The rotating mechanism can be a separate ejector pin or ejector pin plate, or a part of the die. In the die, the ejector pin or ejector pin plate is responsible for pushing the molded plastic product out of the die. When the product has a thread, the ejector pin or ejector pin plate needs to be designed to be rotatable.

[0004] In the existing technology, the general threading structure is usually arranged on the rear mold side. However, since the rear mold is usually used as the moving mold during the use of the die, in the face of high requirements for thread fineness, the threading mechanism on the moving mold cannot perform high-precision thread threading processing. At the same time, the threading structure on the moving mold is prone to aging due to the multiple movements of the moving mold. Therefore, in order to solve the above technical problems, this application proposes a front mold servo threading mechanism. Summary of the Utility Model

[0005] The purpose of the present utility model is achieved in the following way: A front mold servo threading mechanism includes a front template, a backing plate, a bottom plate and a transmission assembly. The bottom surface of the female template is connected to the backing plate. The bottom plate is arranged on the bottom surface of the backing plate away from the female template. The transmission assembly is arranged on the top surface of the bottom plate. The transmission assembly includes a transmission sprocket, a mounting transmission shaft and a belt-driven transmission shaft. The transmission sprocket is arranged on the top surface of the bottom plate. The mounting transmission shaft and the belt-driven transmission shaft are both rotatably mounted between the backing plate and the front template. A support shaft is provided on the bottom surface of the bottom plate. The support shaft passes through the backing plate and the bottom plate and extends towards the front template. A first gear is mounted on the support shaft near the mounting transmission shaft through a bushing. The lower end of the bushing extends towards the transmission sprocket and is fixedly connected to the transmission hinge. The support shaft is rotatably connected to the bushing. An injection hole is provided in the middle of the support shaft. Two driving units are mounted on each side of the first gear. The four driving units have the same structure. The first gear is connected to the mounting transmission shaft through the driving unit. The top of the mounting transmission shaft is detachably mounted with a tapping part. The top of the tapping part has a thread and the top of the tapping part extends towards the front template. An installation hole is provided on the top surface of the male template near the mounting transmission shaft.

[0006] In the above description, as a further solution, the driving unit includes a second gear, a third gear, and a fourth gear. The second gear meshes with the first gear. The fourth gear is arranged on one side of the second gear. The third gear meshes with the fourth gear and the second gear respectively. Both the second gear and the fourth gear are sleeved on the installation transmission shaft. The third gear is connected to the belt-driven transmission shaft. The second gear, the third gear, and the fourth gear are used to provide the rotation effect of the installation transmission shaft.

[0007] In the above description, as a further solution, a cover plate groove is provided at the top surface of the backing plate near the first gear. A sealing cover plate is arranged in the cover plate groove. Rotation grooves are provided at the bottom surface of the cover plate groove near the first gear, the second gear, the third gear, and the fourth gear. The top surfaces of the first gear, the second gear, the third gear, the fourth gear, and the belt-driven transmission shaft are flush with the notch of the rotation groove. The sealing cover plate is used to protect the gears.

[0008] In the above description, as a further solution, communication holes are provided at the four corners of the front template, the backing plate, and the bottom plate. Guide posts are installed in the communication holes. The communication holes of the front template, the backing plate, and the bottom plate are connected to the guide posts through guide sleeves matching the guide posts. The guide posts and the guide sleeves are used to provide the installation effect between the front template, the backing plate, and the bottom plate.

[0009] In the above description, as a further solution, a mounting plate is provided on one side of the bottom plate. An activity channel is provided at the top surface of the bottom plate near the mounting plate. One end of the activity channel extends towards the direction of the driving sprocket, and the end of the activity channel far from the driving sprocket extends towards the direction of the mounting plate. The activity channel is used to provide the activity effect of the chain.

[0010] In the above description, as a further solution, a driving motor is provided on the top surface of the mounting plate. A driving gear is installed on the driving rod of the driving motor. The driving gear is aligned with the activity channel. The driving gear and the driving sprocket are connected by a chain. The driving motor is fixedly installed on the top surface of the mounting plate through a connecting plate. The driving motor is used to drive the sprocket to rotate.

[0011] Compared with the prior art, the beneficial effects of the present utility model are as follows: An injection hole is provided in the middle of the support shaft. At the same time, the support shaft is rotatably connected with the shaft sleeve. The injection hole penetrates through the backing plate and the bottom plate and extends towards the front template. When the sprocket and the first gear rotate through the shaft sleeve, the rotatable shaft sleeve can ensure that the injection hole will not be affected by the rotation of the rotating sprocket and the first gear during threading, ensuring the injection stability. At the same time, the threading structure is arranged in the front mold. At the same time, the front mold is usually used as a stationary mold during the use of the mold. Therefore, during use, it has a high-precision threading function. Description of the Drawings

[0012] Figure 1 It is a three-dimensional structural schematic diagram of the front mold servo thread tapping mechanism of the present utility model;

[0013] Figure 2 It is an exploded structural schematic diagram of the front mold servo thread tapping mechanism of the present utility model;

[0014] Figure 3 is the present utility model Figure 2 Partial enlarged schematic diagram of structure A in;

[0015] Figure 4 It is a sectional view of another perspective of the front mold servo thread tapping mechanism of the present utility model;

[0016] In the figure: 1 - front template, 2 - backing plate, 3 - bottom plate, 4 - drive sprocket, 5 - installation drive shaft;

[0017] 6 - belt-driven drive shaft, 7 - support shaft, 8 - bushing, 9 - first gear, 10 - injection hole, 11 - tapping part;

[0018] 12 - installation hole, 13 - second gear, 14 - third gear, 15 - fourth gear, 16 - cover plate groove;

[0019] 17 - sealing cover plate, 18 - rotating groove, 19 - communication hole, 20 - guide post, 21 - guide sleeve, 22 - installation plate;

[0020] 23 - movable channel, 24 - drive motor, 25 - drive gear, 26 - chain, 27 - connecting plate. Specific embodiments

[0021] The present utility model will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0022] In this embodiment, please refer to Figures 1-4, the front mold servo screw-jacking mechanism for its specific implementation includes a front template 1, a backing plate 2, a bottom plate 3 and a transmission assembly. The bottom surface of the female template is connected to the backing plate 2, and the bottom plate 3 is arranged on the bottom surface of the backing plate 2 away from the female template. It is characterized in that: the transmission assembly is arranged on the top surface of the bottom plate 3, and the transmission assembly includes a transmission sprocket 4, a mounting transmission shaft 5 and a belt-driven transmission shaft 6. The transmission sprocket 4 is arranged on the top surface of the bottom plate 3. The mounting transmission shaft 5 and the belt-driven rotating shaft are both rotatably mounted between the backing plate 2 and the front template 1. A support shaft 7 is arranged on the bottom surface of the bottom plate 3. The support shaft 7 passes through the backing plate 2 and the bottom plate 3 and extends in the direction towards the front template 1. A first gear 9 is mounted on the support shaft 7 near the mounting transmission shaft 5 through a bushing 8. The lower end of the bushing 8 extends towards the direction of the transmission sprocket 4, and the bushing 8 is fixedly connected to the transmission hinge. The support shaft 7 is rotatably connected to the bushing 8. An injection hole 10 is arranged in the middle of the support shaft 7. Two driving units are installed on each side of the first gear 9. The four driving units have the same structure. The first gear 9 is connected to the mounting transmission shaft 5 through the driving unit. A tapping part 11 is detachably mounted on the top of the mounting transmission shaft 5. The top of the tapping part 11 is provided with a thread and the top of the tapping part 11 extends in the direction towards the front template 1. An installation hole 12 is arranged on the top surface of the male template near the mounting transmission shaft 5.

[0023] The driving unit includes a second gear 13, a third gear 14 and a fourth gear 15. The second gear 13 meshes with the first gear 9. The fourth gear 15 is arranged on one side of the second gear 13. The third gear 14 is respectively meshed and connected with the fourth gear 15 and the second gear 13. The second gear 13 and the fourth gear 15 are both sleeved on the mounting transmission shaft 5. The third gear 14 is connected to the belt-driven transmission shaft 6.

[0024] A cover plate groove 16 is arranged on the top surface of the backing plate 2 near the first gear 9. A sealing cover plate 17 is arranged in the cover plate groove 16. Rotating grooves 18 are arranged on the bottom surface of the cover plate groove 16 near the first gear 9, the second gear 13, the third gear 14 and the fourth gear 15. The top surfaces of the first gear 9, the second gear 13, the third gear 14, the fourth gear 15 and the belt-driven transmission shaft 6 are all flush with the notch of the rotating groove 18.

[0025] Communication holes 19 are arranged at the four corners of the front template 1, the backing plate 2 and the bottom plate 3. Guide posts 20 are installed in the communication holes 19. The communication holes 19 of the front template 1, the backing plate 2 and the bottom plate 3 are all connected to the guide posts 20 through guide sleeves 21 matching with the guide posts 20.

[0026] An installation plate 22 is arranged on one side of the bottom plate 3. An activity channel 23 is arranged on the top surface of the bottom plate 3 near the installation plate 22. One end of the activity channel 23 extends towards the direction of the transmission sprocket 4, and the end of the activity channel 23 away from the transmission sprocket 4 extends towards the direction of the installation plate 22.

[0027] A driving motor 24 is provided on the top surface of the mounting plate 22. A driving gear 25 is mounted on the driving rod of the driving motor 24. The driving gear 25 is aligned with the movable channel 23. The driving gear 25 and the transmission sprocket 4 are connected by a chain 26. The driving motor 24 is fixedly installed on the top surface of the mounting plate 22 through a connecting plate 27.

[0028] The working process of the present utility model: After placing the front mold servo tapping mechanism on the mold base, the position of the chain 26 and the sprocket is adjusted by the driving motor 24 to adjust the starting position of the thread of the tapping member 11, and then the adjustment is completed;

[0029] The mold is closed, and injection molding is carried out through the injection hole 10 in the direction towards the female mold plate. When the injection molding is completed, the mold is opened. The driving motor 24 rotates the chain 26 through the driving gear 25. The chain 26 drives the sprocket, and the sprocket drives the first gear 9 through the bushing 8;

[0030] When the first gear 9 rotates, the first gear 9 drives the second gear 13 and the fourth gear 15 to rotate. Since the third gear 14 is meshed between the second gear 13 and the fourth gear 15, the second gear 13 and the fourth gear 15 are rotated in the same direction and at the same speed;

[0031] When the second gear 13 and the fourth gear 15 rotate, the tapping member 11 is driven to rotate in the direction opposite to the thread release direction through the installation transmission, achieving the effect of ejecting the mold from the front mold.

[0032] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0033] In addition, in the description of the embodiments of the present utility model, unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components. For those skilled in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and should not be construed as indicating or implying relative importance.

[0034] Finally, it should be noted that the above embodiments are only specific embodiments of the present utility model, used to illustrate the technical solutions of the present utility model, rather than limiting it. The protection scope of the present utility model is not limited thereto. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art within the technical scope disclosed by the present utility model can still modify the technical solutions recorded in the foregoing embodiments, or can easily think of changes, or make equivalent replacements for some of the technical features; and these modifications, changes, or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present utility model, and should all be covered by the protection scope of the present utility model. Therefore, the protection scope of the present utility model should be subject to the protection scope of the claims.

Claims

1. The front mold servo screw-jacking mechanism, including a front template, a backing plate, a bottom plate and a transmission assembly, the bottom surface of the female template is connected to the backing plate, the bottom plate is arranged on the bottom surface of the backing plate away from the female template, and is characterized in that: The transmission assembly is arranged on the top surface of the bottom plate. The transmission assembly includes a transmission sprocket, an installation transmission shaft, and a belt-rotating transmission shaft. The transmission sprocket is arranged on the top surface of the bottom plate. The installation transmission shaft and the belt-rotating transmission shaft are both rotatably installed between the backing plate and the front template. A support shaft is provided on the bottom surface of the bottom plate. The support shaft penetrates through the backing plate and the bottom plate and extends in the direction towards the front template. A first gear is installed on the support shaft near the installation transmission shaft through a bushing. The lower end of the bushing extends in the direction towards the transmission sprocket, and the bushing is fixedly connected to the transmission hinge. The support shaft is rotatably connected to the bushing. An injection hole is provided in the middle of the support shaft. Two driving units are installed on each side of the first gear. The four driving units have the same structure. The first gear is connected to the installation transmission shaft through the driving unit. A tapping part is detachably installed on the top of the installation transmission shaft. The top of the tapping part has a thread and the top of the tapping part extends in the direction towards the front template. An installation hole is provided on the top surface of the male template near the installation transmission shaft.

2. The front mold servo screw mechanism according to claim 1, characterized in that: The driving unit includes a second gear, a third gear, and a fourth gear. The second gear meshes with the first gear. The fourth gear is arranged on one side of the second gear. The third gear is meshed and connected to the fourth gear and the second gear respectively. The second gear and the fourth gear are both sleeved on the installation transmission shaft. The third gear is connected to the belt-rotating transmission shaft.

3. The front mold servo screw mechanism according to claim 2, wherein: A cover plate groove is provided on the top surface of the backing plate near the first gear. A sealing cover plate is provided in the cover plate groove. Rotating grooves are provided on the bottom surface of the cover plate groove near the first gear, the second gear, the third gear, and the fourth gear. The top surfaces of the first gear, the second gear, the third gear, the fourth gear, and the belt-rotating transmission shaft are all flush with the notch of the rotating groove.

4. The front mold servo screw mechanism according to claim 1, characterized in that: Communication holes are provided at the four corners of the front template, the backing plate, and the bottom plate. Guide columns are installed in the communication holes. The communication holes of the front template, the backing plate, and the bottom plate are connected to the guide columns through guide sleeves matching the guide columns.

5. The front mold servo screw mechanism according to claim 1, wherein: An installation plate is provided on one side of the bottom plate. An activity channel is provided on the top surface of the bottom plate near the installation plate. One end of the activity channel extends in the direction towards the transmission sprocket, and the end of the activity channel away from the transmission sprocket extends in the direction towards the installation plate.

6. The front mold servo screw-jacking mechanism according to claim 5, wherein: A driving motor is provided on the top surface of the installation plate. A driving gear is installed on the driving rod of the driving motor. The driving gear is aligned with the activity channel. A chain is connected between the driving gear and the transmission sprocket. The driving motor is fixedly installed on the top surface of the installation plate through a connecting plate.

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