Rubber cap production equipment

Abstract

The utility model provides rubber cap production equipment, and belongs to the technical field of plastic product processing. The rubber cap production equipment comprises a heat shrink tube unwinding structure, a heat shrink tube three-dimensional structure and a rubber cap forming structure which are arranged in sequence. According to the utility model, the tubular material which is pressed to be flat can be continuously recovered into a three-dimensional columnar structure or an approximately columnar structure and is produced into the rubber cap, so that the seamless rubber cap can be automatically produced, the labor cost is reduced, and the production efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of plastic product processing, in particular to a rubber cap production device. Background Art

[0002] Rubber caps are widely used in the fields of wine, food, and medicine packaging to seal the bottle mouth, enhance appearance, and prevent counterfeiting.

[0003] Seamless means that the cap body of the rubber cap is made of an integrated tubular material, and there is no bonding gap in the cap body. At present, the new seamless rubber cap can play a better sealing and aesthetic role. At the same time, due to the seamless characteristics of the cap body, it can effectively prevent the cap body from being cut and transplanted, thus improving the anti-counterfeiting effect of the rubber cap.

[0004] However, the seamless rubber caps currently mainly use continuous seamless tubular materials as the raw materials for the cap body. In addition, the seamless tubular materials are flattened and exist in the form of rolls for the convenience of transportation and storage, but the cap body is generally a columnar structure or a nearly columnar structure after the rubber cap is formed. How to continuously and automatically restore the flattened tubular material to a three-dimensional columnar structure or a nearly columnar structure and produce it into a rubber cap, the current rubber cap production field has not solved this problem. This makes it impossible to automate the production of seamless rubber caps, greatly increasing labor costs and reducing production efficiency. Utility Model Content

[0005] In view of the defects in the prior art, the purpose of the utility model is to provide a rubber cap production equipment.

[0006] According to a rubber cap production device provided by the utility model, the production device comprises a heat shrink tube unwinding structure, a heat shrink tube three-dimensional structure, and a rubber cap forming structure which are arranged in sequence.

[0007] The heat shrink tube unwinding structure includes an unwinding shaft and a first traction roller. The first traction roller obtains the heat shrink tube from the unwinding shaft. The unwinding shaft is driven by a first servo motor, which is electrically connected to the PLC; the first traction roller is driven by a second servo motor, which is electrically connected to the PLC.

[0008] The heat shrink tube unwinding structure further includes a conduction shaft, the conduction shaft obtains the heat shrink tube from the unwinding shaft, and the first traction pressure roller obtains the heat shrink tube from the conduction shaft. The heat shrink tube unwinding structure further includes a deviation correction device, which is located between the unwinding shaft and the first traction pressure roller. The heat shrink tube unwinding structure further includes a tension control device, which is connected to the unwinding shaft.

[0009] The three-dimensional structure of the heat shrink tube comprises an expansion shaft, a second traction roller, and a ring cutting device. The second traction roller and the ring cutting device are arranged outside the expansion shaft.

[0010] The expansion shaft is a structure placed inside the heat shrink tube transmitted by the heat shrink tube unwinding structure, and is a columnar structure or a nearly columnar structure that plays the role of expanding the heat shrink tube. Preferably, the end of the expansion shaft near the heat shrink tube unwinding structure is a conical or frustum-shaped structure to reduce the traction resistance of the heat shrink tube. The heat shrink tube in the expanded state on the expansion shaft can be directly sleeved on the mold of the rubber cap molding structure. The expansion shaft is supported by a roller structure or supported by magnetic suspension through a magnetic suspension structure. The roller structure includes: a pressure roller, which is arranged on the outside of the expansion shaft; and / or the magnetic suspension structure includes: at least two magnets, which are relatively arranged on the expansion shaft and on the outside of the expansion shaft. When the expansion shaft is supported by a pressure roller, a rolling element is arranged at the position corresponding to the pressure roller of the expansion shaft to reduce friction resistance. A rolling element is arranged at the position corresponding to the second traction pressure roller of the expansion shaft to reduce friction resistance. The pressure roller is a powered pressure roller or an unpowered pressure roller; the number of the pressure rollers is one or more groups, and the number of each group is at least two.

[0011] Preferably, an inner groove is provided on the expansion shaft at a position corresponding to the second traction roller to limit the forward and backward displacement of the center column in the feeding direction. Alternatively, a rolling element is provided on the expansion shaft at a position corresponding to the second traction roller to reduce the frictional resistance. Alternatively, a groove is provided on the expansion shaft at a position corresponding to the second traction roller, and a rolling element is provided in the groove to achieve the effects of limiting displacement and reducing frictional resistance at the same time. Preferably, a groove is provided on the expansion shaft at a position corresponding to the roller to limit the forward and backward displacement of the center column in the feeding direction. Alternatively, a rolling element is provided on the expansion shaft at a position corresponding to the roller to reduce frictional resistance. Alternatively, a groove is provided on the expansion shaft at a position corresponding to the roller, and a rolling element is provided in the groove to achieve the effects of limiting displacement and reducing frictional resistance at the same time.

[0012] The circular cutting device includes a blade, which is driven by a motor, and the blade tip of the blade can make a circular motion along the circumference of the expansion shaft, so as to cut the continuous heat shrink tube into independent cap body materials. The horizontal distance between the blade and the end of the expansion shaft near the rubber cap forming structure is an integer multiple of the length of the heat shrink tube to be cut, and the integer is zero or a positive integer.

[0013] Preferably, a circular cutting groove is provided on the expansion shaft at a position corresponding to the blade, so as to facilitate better slitting of the heat shrink tube.

[0014] The second traction roller is driven by a third servo motor, and the third servo motor is electrically connected to the PLC. If a pre-printed cursor structure is provided on the heat shrink tube, a photoelectric switch is installed at any position of the three-dimensional structure of the heat shrink tube, and the photoelectric switch is electrically connected to the PLC.

[0015] The rubber cap forming structure comprises a turntable transmission structure, a rubber cap forming element and a rubber cap blanking structure.

[0016] The turntable transmission structure includes a transmission disk and a mold installed on the transmission disk, and the shape of the mold is consistent with the shape of the final finished product rubber cap. The number of molds installed on the transmission disk is greater than or equal to 3. At least three stations are arranged around the outer side of the turntable transmission structure: a loading station, a molding station and a unloading station. The rubber cap molding element is arranged at the molding station, the rubber cap unloading structure is arranged at the unloading station, and the three-dimensional structure of the heat shrink tube is arranged at the loading station. The central angles of the radial positions of the transmission disk where the molds are located are the same. The axis of the mold coincides with or is perpendicular to the radius of the turntable transmission structure where it is located. The molds are installed on the transmission disk at equal intervals.

[0017] The transmission disc is driven by a fourth servo motor, which is electrically connected to the PLC; or, the transmission disc is driven by a dividing plate to perform stepping motion. When the mold rotates to the loading station, the axis of the corresponding mold coincides with the axis of the expansion shaft of the three-dimensional structure of the heat shrink tube.

[0018] The rubber cap molding element includes a shrinkage structure, or a shrinkage structure and one or more auxiliary structures, which are arranged one by one on the molding station. The auxiliary structures include a top flattening structure, a cap top punching die structure, a cap top capping hot pressing structure and / or a hot stamping structure, etc.

[0019] The workstations also include an empty workstation, which is added at the corresponding position where the mold stops when the transmission disc stops, and is after the workstation of the heat shrink tube shrinking structure and before the workstation of the rubber cap unloading structure.

[0020] The rubber cap unloading structure includes a compressed air direct blowing structure and / or a manipulator structure and / or a suction cup structure, so as to avoid scratches on the rubber cap wall due to excessive friction.

[0021] Compared with the prior art, the utility model has the following beneficial effects:

[0022] The utility model can continuously restore the tubular material pressed to a flat state into a three-dimensional columnar structure or a nearly columnar structure and produce a rubber cap, so that the seamless rubber cap can be automatically produced, the labor cost is reduced, and the production efficiency is increased. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Other features, objects and advantages of the present invention will become more apparent by reading the detailed description of non-limiting embodiments with reference to the following drawings:

[0024] Figure 1 It is a schematic diagram of the three-dimensional structure of the heat shrink tube;

[0025] Figure 2 It is a schematic diagram of the first supporting method of the three-dimensional structure of the heat shrink tube;

[0026] Figure 3 It is a schematic diagram of the second supporting method of the three-dimensional structure of the heat shrink tube;

[0027] Figure 4 This is a schematic diagram of a further improvement of the first support method;

[0028] Figure 5 This is a schematic diagram of the overall structure of the rubber cap production equipment;

[0029] Figure 6 It is a structural schematic diagram of the heat shrink tube unwinding structure;

[0030] Figure 7 It is a schematic diagram of the structure after the heat shrink tube unwinding structure is further improved;

[0031] Figure 8 A structural schematic diagram of a rubber cap molding structure;

[0032] Fig. 9 Another structural schematic diagram of the rubber cap molding structure.

[0033] 1-heat shrink tube unwinding structure; 2-heat shrink tube three-dimensional structure; 3-rubber cap molding structure; 4-heat shrink tube; 11-unwinding shaft; 12-conduction shaft; 13-first traction roller; 14-correction device; 21 expansion shaft; 22-second traction roller; 23-first groove; 24-pressure roller; 25-second groove; 26-magnet; 27-first rolling element; 28-circular cutting device; 29-circular cutting groove; 31-turntable transmission structure; 32-rubber cap molding element; 33-rubber cap blanking structure; 300-transmission disk; 301-mold; 302-shrinkage structure; 303-top flattening structure; 304-cap top punching die structure; 305-cap top capping hot pressing structure; 306-hot stamping structure. DETAILED DESCRIPTION

[0034] The utility model is described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the utility model, but do not limit the utility model in any form. It should be pointed out that for those of ordinary skill in the art, several changes and improvements can be made without departing from the concept of the utility model. These all belong to the protection scope of the utility model.

[0035] like Figure 5 As shown, this embodiment provides a rubber cap production device, including: a heat shrink tube unwinding structure 1, a heat shrink tube three-dimensional structure 2 and a rubber cap molding structure 3 arranged in sequence.

[0036] The heat shrink tube three-dimensional structure 2 is located between the heat shrink tube unwinding structure 1 and the rubber cap forming structure 3, and obtains the heat shrink tube 4 before three-dimensionalization output by the heat shrink tube unwinding structure 1. The rubber cap forming structure 3 obtains the heat shrink tube 4 after three-dimensionalization output by the heat shrink tube three-dimensional structure 2. The heat shrink tube unwinding structure 1 can wind and unwind the heat shrink tube, and the heat shrink tube 4 unwinded from the heat shrink tube unwinding structure 1 is sleeved on the heat shrink tube three-dimensional structure 2 in an expanded state and fed into the rubber cap forming structure 3.

[0037] like Figure 6 As shown, the heat shrink tube unwinding structure 1 includes: an unwinding shaft 11 and a first traction roller 13. The heat shrink tube 4 in a flattened state is wound on the unwinding shaft 11, and the heat shrink tube 4 enters the first traction roller 13 from the unwinding shaft 11, and the unwinding is achieved by the rotation of the first traction roller 13 and the unwinding shaft 11. Preferably, the heat shrink tube unwinding structure 1 can also be provided with a conduction shaft 12, which plays the role of conducting the heat shrink tube 4 between the first traction roller 13 and the unwinding shaft 11. Figure 7 As shown, the heat shrink tube unwinding structure 1 can also add a correction device 14 and / or a tension control device according to actual conditions. The correction device 14 can be arranged between the unwinding shaft 11 and the first traction roller 13, and the tension control device is connected to the unwinding shaft 11 to control the unwinding of the unwinding shaft 11.

[0038] like Figure 1 As shown, this embodiment provides a three-dimensional heat shrink tube structure, including: an expansion shaft 21, a second traction roller 22 and a ring cutting device 28. The three-dimensional heat shrink tube structure 2 corresponds to the position of the first traction roller 13, so as to obtain the heat shrink tube 4 from the first traction roller 13. Specifically, one end of the expansion shaft 21 of the three-dimensional heat shrink tube structure 2 corresponds to the position of the first traction roller 13.

[0039] The expansion shaft 21 is a structure placed inside the heat shrink tube, which serves the purpose of expanding the heat shrink tube 4 so that it is stretched into a columnar structure or a nearly columnar structure. The second traction roller 22 and the circular cutting device 28 are arranged on the outside of the expansion shaft 21, and an axial friction force is generated on the heat shrink tube in a rotating state, and the heat shrink tube 4 sleeved on the surface of the expansion shaft 21 is pulled by the outer periphery of the second traction roller 22. One end of the expansion shaft 21 is close to the heat shrink tube unwinding structure 1, and the other end is close to the rubber cap forming structure 3. The end near the heat shrink tube unwinding structure 1 is conical or frustum-shaped to reduce the traction resistance of the heat shrink tube. At the same time, the diameter of the expansion shaft 21 is smaller than the diameter of the heat shrink tube 4. The circular cutting device 28 is arranged toward the expansion shaft 21, preferably near the rubber cap forming structure 3. The circular cutting device 28 is composed of one or more groups of blades, each group of blades is at least one, and the blade tip moves in a circular motion along the circumference of the expansion shaft 21, driven by a motor. Thereby, the continuous heat shrink tube 4 is cut into independent cap body materials. The horizontal distance between the position of the blade and the end of the expansion shaft near the rubber cap forming structure 3 is an integer multiple (zero multiple or positive integer multiple) of the length of the heat shrink tube to be cut. In order to better cut the heat shrink tube, a circular cutting groove 29 is set at the position corresponding to the expansion shaft 21 and the blade of the circular cutting device 28. The heat shrink tube 4 is output from the heat shrink tube unwinding structure 1 and sleeved on the expansion shaft 21. The rotation of the second traction roller 22 generates a friction driving force on the heat shrink tube 4, causing the heat shrink tube to slide toward the rubber cap forming structure 3. The heat shrink tube 4 in the expanded state on the expansion shaft 21 can be directly sleeved on the mold 301 of the rubber cap forming structure 3.

[0040] The number of the second traction rollers 22 can be one group or multiple groups, with at least two second traction rollers in one group. The two second traction rollers can be arranged up and down or left and right.

[0041] like Figure 2 As shown, in order to prevent the expansion shaft 21 from moving forward and backward in the material feeding direction due to the rotation of the second traction roller 22, a first groove 23 is provided at the position of the expansion shaft 21 in contact with the second traction roller 22. Under the limiting effect of the first groove 23, the expansion shaft 21 will not move with the rotation of the second traction roller 22. In order to reduce friction resistance, a first rolling element 27 is provided at the position of the expansion shaft 21 in contact with the second traction roller 22, so that the heat shrink tube 4 is in rolling friction between the rolling element 27 and the second traction roller 22. The first rolling element 27 can be a roller, a roller or other components. Figure 4 As shown, in order to simultaneously achieve the effects of reducing friction resistance and limiting, a first rolling element 27 can be disposed in the first groove 23 .

[0042] In order to make the expansion shaft 21 more stable when transmitting the heat shrink tube, the utility model further provides a support device. This embodiment provides the following two support methods:

[0043] The first is supported by a roller structure. Figure 2As shown, the roller structure includes a pressure roller 24, which is arranged outside the expansion shaft 21. In the working state, the outer periphery of the pressure roller 24 rolls in contact with the heat shrink tube 4 sleeved on the surface of the expansion shaft 21. In this way, the expansion shaft 21 can be supported by the pressure roller 24 and the second traction pressure roller 22. The pressure roller 24 can also be a powered pressure roller or an unpowered pressure roller, and the pressure roller 24 can be implemented in one or more groups.

[0044] Similarly, a second groove 25 or a second rolling element is provided at the position of the expansion shaft 21 in contact with the pressure roller 24 , and a second rolling element may also be provided in the second groove 25 , so that the heat shrink tube 4 is in rolling friction between the second rolling element and the pressure roller 24 .

[0045] The second is supported by a magnetic suspension structure. Figure 3 As shown, the magnetic suspension structure on the expansion shaft 21 and the outside of the expansion shaft 21 puts the expansion shaft 21 in a magnetic suspension state. The magnetic suspension structure includes at least two magnets 26, one is arranged on the expansion shaft 21, and the other is arranged outside the expansion shaft 21. The expansion shaft 21 is in a suspension state through the repulsive force between the two. In order to ensure the stability of the expansion shaft 21, in this embodiment, a group of magnets 26 are respectively arranged at the two ends of the expansion shaft 21, one of each group of magnets 26 is arranged on the expansion shaft 21, and two are arranged below. The upper and lower magnets repel each other with the same polarity, so that the expansion shaft 21 is magnetically suspended by the two groups of magnets 26.

[0046] like Figure 8 and Fig. 9 As shown, the rubber cap forming structure 3 includes: a turntable transmission structure 31, a rubber cap forming element 32 and a rubber cap blanking structure 33. The turntable transmission structure 31 includes a transmission disk 300 and a mold 301 installed on the transmission disk. The shape of the mold 301 is consistent with the shape of the final finished rubber cap. The number of molds 301 installed on the transmission disk is greater than or equal to 3, corresponding to the three stations of the heat shrink tube three-dimensional structure 2, the rubber cap forming element 32 and the rubber cap blanking structure 33. The rubber cap forming element 32 includes a shrinking structure 302, for example, a hot air or steam shrinking structure can be used.

[0047] Multiple molds 301 can be installed at equal intervals on a circumference of the transmission disk 300, that is, the central angles of the radius positions of the transmission disk 300 between adjacent molds 301 are the same. Multiple stations are arranged around the circumference of the turntable transmission structure 31. The stations include: a loading station, a molding station, and a unloading station. The rubber cap molding element 32 is arranged on the molding station, the rubber cap unloading structure 33 is arranged on the unloading station, and the heat shrink tube three-dimensional structure 2 is arranged on the loading station. Specifically, the loading station corresponds to the position where the expansion shaft 21 of the heat shrink tube three-dimensional structure 2 is located. When a mold 301 runs to the loading station where the expansion shaft 21 is located, the axis of the mold 301 coincides with the axis of the expansion shaft 21. The heat shrink tube 4 in a stretched state on the expansion shaft 21 can be smoothly sleeved on the mold 301.

[0048] The axis of the mold 301 may coincide with the radius of the turntable transmission structure 31, in which case the axis of the expansion shaft 21 is on the same plane as the turntable transmission structure 31. The axis of the mold 301 may also be perpendicular to the radius of the turntable transmission structure 31, in which case the axis of the expansion shaft 21 is perpendicular to the turntable transmission structure 31. In the case of multiple molds 301, they are preferably evenly distributed on the same circumference, that is, the center angles of the radial positions of the transmission disk 300 between the molds 301 are the same, and they may also be unevenly arranged in other embodiments.

[0049] When the number of molds 301 is greater than or equal to 3 and evenly distributed, they correspond to the positions where the three-dimensional heat shrink tube structure 2, the rubber cap molding element 32 and the rubber cap blanking structure 33 are located at the same time. Specifically, the position where the three-dimensional heat shrink tube structure 2 is located corresponds to the position where the expansion axis 21 of the three-dimensional heat shrink tube structure 2 is located. Fig. 9 As shown, the rubber cap molding element 32 may include one or more auxiliary structures in addition to the shrink structure 302, including: a top flattening structure 303, a cap top punching die structure 304, a cap top capping hot pressing structure 305 and / or a hot stamping structure 306, which are respectively arranged on a molding station, and at this time, the number of molds 301 can be increased synchronously. The above structure is the same as that of a conventional rubber cap production device.

[0050] The unwinding shaft 11 is driven by the first servo motor, and the second traction roller 22 is driven by the third servo motor. The third servo motor runs synchronously with the second servo motor, and the second traction roller 22 is synchronized with the first traction roller. If there is a pre-printed cursor structure on the heat shrink tube 4, a photoelectric switch can be installed at any point on the three-dimensional structure 2 of the heat shrink tube, and the photoelectric switch controls the movement of the second servo motor and the third servo motor through the PLC. If there is no pre-printed cursor structure on the heat shrink tube, the second servo motor and the third servo motor are controlled by the PLC to pull the material in fixed-length steps. The turntable transmission structure 31 is driven by the fourth servo motor, and can also be driven by a traditional dividing plate for stepping motion.

[0051] If the equipment on a certain station is too large to fit in one station, you can also add an empty station in the adjacent position to increase the usable area of ​​the position. The above structure needs to be added at the corresponding position where the mold stops when the transmission disk stops, and should be after the heat shrink tube shrinking structure station and before the rubber cap unloading structure station.

[0052] The rubber cap unloading structure 33 can be a conventional compressed air direct blowing structure to remove the caps, and the caps can be directly dropped into a container after being removed, or can be strung into a string of a specific number by a conventional stringing mechanism; the rubber cap unloading structure 33 can also be a manipulator structure and / or a suction cup structure, and the caps can be directly placed into a container or into a corresponding position on a sorting tray after being removed. It is preferred that the rubber cap unloading structure adopts a manipulator structure, and the compressed air direct blowing structure is performed at the same time to avoid scratches on the rubber cap wall due to excessive friction.

[0053] According to the above structure, the device controller PLC is electrically connected to the first servo motor, and is connected to drive the heat shrink tube unwinding structure 1 through a mechanical roller, so that after the heat shrink tube is unwound, the device controller PLC is electrically connected to the second servo motor, and drives the first traction roller 13 through a mechanical roller to pull the heat shrink tube 4 to the input end of the expansion shaft. The device controller PLC is electrically connected to the third servo motor, and drives the second traction roller to rotate through a mechanical roller to drive the heat shrink tube to be propped up through the expansion shaft 21 to form a columnar structure or a nearly columnar structure. The device controller PLC is electrically connected to a photoelectric switch (such as a color mark sensor) and / or a step-by-step puller to expand the heat shrink tube through the expansion shaft 21 and stay at a predetermined position, and then the ring cutting device 28 cuts the heat shrink tube along the circumference to form a columnar structure with a fixed preset length or an independent cap structure of a nearly columnar structure.

[0054] The independent cap body structure cut by the circular cutting device 28 is pushed to the mold 301 by the third servo motor driving the second traction pressure roller 22 to rotate. The top of the heat shrink tube protrudes from the top of the mold. The equipment controller PLC is electrically connected to the fourth servo motor or the turntable motor to rotate the mold to the shrink structure station. From the top, in a straight line with the center axis of the mold, hot air and / or steam are blown to the mold to shrink and shape it, and its shape becomes consistent with the mold surface. After that, the cap top punching die, cap top capping hot pressing, hot stamping, and material cutting operations can be performed according to the existing technology. This solves the problem that seamless rubber caps cannot be produced automatically, greatly reduces labor costs, and improves production efficiency.

[0055] In the description of the present application, it should be understood that the term "plurality" refers to two or more, and the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0056] The above describes the specific embodiments of the present invention. It should be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art can make various changes or modifications within the scope of the claims, which does not affect the essence of the present invention. In the absence of conflict, the embodiments of the present application and the features in the embodiments can be combined with each other at will.

Claims

1. A rubber cap production equipment, characterized in that: It comprises: a heat shrink tube unwinding structure (1), a heat shrink tube three-dimensional structure (2) and a rubber cap forming structure (3) which are arranged in sequence; The three-dimensional heat shrink tube structure (2) comprises: an expansion shaft (21), a second traction pressure roller (22) and a ring cutting device (28); The expansion shaft (21) is a structure placed inside the heat shrink tube (4) transported by the heat shrink tube unwinding structure (1); The second traction pressure roller (22) and the circular cutting device (28) are arranged on the outside of the expansion shaft (21); The rubber cap molding structure (3) comprises: a rubber cap molding element (32).

2. The rubber cap production equipment according to claim 1, characterized in that: The heat shrink tube unwinding structure (1) comprises: an unwinding shaft (11) and a first traction pressure roller (13); The first traction pressure roller (13) obtains the heat shrink tube (4) from the unwinding shaft (11).

3. The rubber cap production equipment according to claim 2, characterized in that: The heat shrink tube unwinding structure (1) further comprises: a deviation correction device (14) located between the unwinding shaft (11) and the first traction pressure roller (13); And / or, the heat shrink tube unwinding structure (1) further comprises: a conduction shaft (12), the conduction shaft (12) acquires the heat shrink tube (4) from the unwinding shaft (11), and the first traction pressure roller (13) acquires the heat shrink tube (4) from the conduction shaft (12); And / or, the heat shrink tube unwinding structure (1) further comprises: a tension control device connected to the unwinding shaft (11); And / or, the unwinding shaft (11) is driven by a first servo motor, and the first servo motor is electrically connected to the PLC; And / or, the first traction pressure roller (13) is driven by a second servo motor, and the second servo motor is electrically connected to the PLC.

4. The rubber cap production equipment according to claim 1, characterized in that: The end of the expansion shaft (21) near the heat shrink tube unwinding structure (1) is a conical or frustum-shaped structure; And / or, the heat shrink tube (4) in the expanded state on the expansion shaft (21) can be directly sleeved onto the mold (301) of the rubber cap molding structure (3); And / or, the expansion shaft (21) is supported by a roller structure or is magnetically suspended by a magnetic suspension structure; And / or, the second traction pressure roller (22) is driven by a third servo motor, and the third servo motor is electrically connected to the PLC; And / or, if a pre-printed cursor structure is provided on the heat shrink tube (4), a photoelectric switch is installed at any location of the three-dimensional structure (2) of the heat shrink tube, and the photoelectric switch is electrically connected to the PLC; And / or, the circular cutting device (28) comprises: a blade, the blade is driven by a motor, and the blade tip of the blade can perform circular motion along the circumference of the expansion shaft (21); And / or, a rolling element is provided on the expansion shaft (21) at a position corresponding to the second traction roller (22); or, a groove is provided on the expansion shaft (21) at a position corresponding to the second traction roller (22); or, a groove is provided on the expansion shaft (21) at a position corresponding to the second traction roller (22), and a rolling element is provided in the groove.

5. The rubber cap production equipment according to claim 4, characterized in that: The roller structure comprises: A pressure roller (24), wherein the pressure roller (24) is arranged on the outside of the expansion shaft (21); And / or, the magnetic suspension structure comprises: At least two magnets (26) are arranged oppositely on the expansion shaft (21) and outside the expansion shaft (21); And / or, the horizontal distance between the blade and the end of the expansion shaft (21) near the rubber cap forming structure (3) is an integer multiple of the length of the heat shrink tube (4) to be cut, and the integer is zero or a positive integer; And / or, a circular cutting groove (29) is provided on the expansion shaft (21) at a position corresponding to the blade.

6. The rubber cap production equipment according to claim 5, characterized in that: When the expansion shaft (21) is supported by the pressure roller (24): A rolling element is arranged on the expansion shaft (21) at a position corresponding to the pressure roller (24); or a groove is arranged on the expansion shaft (21) at a position corresponding to the pressure roller (24); or a groove is arranged on the expansion shaft (21) at a position corresponding to the pressure roller (24), and a rolling element is arranged in the groove; And / or, the pressure roller (24) is a powered pressure roller or an unpowered pressure roller; And / or, the number of the pressing rollers (24) is one or more groups, and the number of each group is at least two.

7. The rubber cap production equipment according to claim 1, characterized in that: The rubber cap forming structure (3) further comprises: a turntable transmission structure (31) and a rubber cap blanking structure (33); The turntable transmission structure (31) comprises a transmission disk (300) and a mold (301) mounted on the transmission disk; At least three workstations are arranged around the outer side of the turntable transmission structure (31): a loading station, a molding station and a unloading station. The rubber cap molding element (32) is arranged on the molding station, the rubber cap unloading structure (33) is arranged on the unloading station, and the heat shrink tube three-dimensional structure (2) is arranged on the loading station.

8. The rubber cap production equipment according to claim 7, characterized in that: The molds (301) are installed on the transmission plate (300) at equal intervals. and / or, the number of the molds (301) is greater than or equal to 3; and / or, the central angles of the radius positions of the transmission plate (300) between the molds (301) are the same; And / or, the axis of the mold (301) coincides with or is perpendicular to the radius of the turntable transmission structure (31) where it is located; and / or, the transmission disc (300) is driven by a fourth servo motor, the fourth servo motor is electrically connected to the PLC, or the transmission disc (300) is driven by a dividing disc; And / or, when the mold (301) rotates to the loading station, the axis of the corresponding mold (301) coincides with the axis of the expansion axis (21) of the three-dimensional structure (2) of the heat shrink tube; And / or, the rubber cap blanking structure (33) comprises: a compressed air direct blowing structure and / or a manipulator structure and / or a suction cup structure; And / or, the rubber cap molding element (32) includes a shrinkage structure (302), or the rubber cap molding element (32) includes a shrinkage structure (302) and one or more auxiliary structures, which are arranged one by one on the molding station.

9. The rubber cap production equipment according to claim 8, characterized in that: The workstations also include an empty workstation, which is added at the corresponding position where the mold stops when the transmission disc stops, and is after the workstation of the shrinking structure and before the workstation of the rubber cap unloading structure; And / or, the auxiliary structure includes: a top flattening structure (303), a cap top punching die structure (304), a cap top capping hot pressing structure (305) and / or a hot stamping structure (306).

10. The rubber cap production equipment according to claim 1, characterized in that: The glue cap molding element (32) includes a shrinkage structure (302), or the glue cap molding element (32) includes a shrinkage structure (302) and one or more auxiliary structures.

11. The rubber cap production equipment according to claim 10, characterized in that: The auxiliary structure comprises: a top flattening structure (303), a cap top punching die structure (304), a cap top capping hot pressing structure (305) and / or a hot stamping structure (306).

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