Later-stage forming device for unscrewing cover

Abstract

A later forming device for unscrewing covers is improved on the basis of an existing rack, a driving mechanism, a plurality of machining tools, a feeding mechanism and the like and further comprises a conveying mechanism which is driven by a main motor through a transmission mechanism and can operate intermittently, and the conveying mechanism comprises a plurality of conveying wheels and conveying belts wound on the conveying wheels. A plurality of through holes allowing unscrewing cover blanks to be located are sequentially formed in the conveying belt in the length direction, one section of the conveying belt can be laid on the table top, and the feeding hole and the machining holes in the table top correspond to the corresponding through holes in the section of the conveying belt in the stalling state in the vertical direction; and meanwhile, a discharging mechanism is further arranged and located below the table top, and the machined unscrewing cover finished product located on the conveying belt can be separated from the conveying belt. By the adoption of the structure, the accuracy and reliability of feeding and jacking operation rhythms can be guaranteed, intermittent operation can be achieved through the conveying belt, unscrewing cover blanks can be conveyed, and the whole structure is simple and easy to adjust, control and implement.

Description

TECHNICAL FIELD

[0001] The utility model relates to the production equipment technical field of screw -off cover, specifically refers to a screw -off cover's later forming device. BACKGROUND

[0002] Many foods (such as fruits, pickles, condiments, etc.) on the market adopt glass bottles to contain, and screw -off covers are configured on the bottle mouths of the glass bottles to seal the glass bottles. At present, the screw -off cover is first cut down by a metal sheet (there are double-sided coated tinplate and aluminum plate), then the screw -off cover blank is formed by blanking and stamping, then the edge of the circumferential surface of the screw -off cover blank is edge rolled, then the claw is rolled to form a screw -off cover semi-finished product with three claws, four claws or six claws, and then sealing glue is injected into the screw -off cover semi-finished product, and the screw -off cover finished product is formed after high-temperature baking and curing.

[0003] In the process of making the above-mentioned screw -off cover, the traditional method is to process each process on different equipment, such as the "screw -off cover glue injection auxiliary device and its glue injection method" disclosed in Chinese patent application publication No. CN115108280A, "punching machine for metal bottle cap production" disclosed in CN216679742U, etc. But with the progress of technology, there are also a plurality of late forming devices (referring to the processing equipment after blanking and stamping into screw -off cover blank) collected in the same equipment at present, such as the intelligent linkage cover forming machine disclosed in Chinese publication No. CN216989618U. Since the same power motor is used, it can drive multiple tray cams to rotate, drive the corresponding rod seat to rise according to the set rhythm, and the rod seat and the corresponding tooling on the upper part are matched to process the corresponding work on the work station. The claw in the feeding mechanism can feed as needed, so that the feeding and the lifting operation rhythm of the corresponding work station are accurate and reliable, ensuring the rapid production of the screw -off cover and improving the production efficiency of the screw -off cover. SUMMARY

[0004] The utility model solves the technical problem that the present situation of prior art provides a screw -off cover's late forming device that can also ensure the rhythm of feeding and lifting operation is accurate and reliable.

[0005] The technical scheme adopted by the utility model to solve the above technical problems is: a screw -off cover's late forming device, comprising:

[0006] The rack has a table top, and the table top is designed with loading holes and processing holes distributed along the transverse direction;

[0007] A driving mechanism is installed at the lower part of the frame, which includes a main motor and a main shaft connected with the main motor, and a plurality of main cams corresponding to the number of machining holes are installed on the main shaft, and a top rod seat is supported on each main cam and located below the corresponding machining hole and can shuttle in the corresponding machining hole, and in the non-working state, the top of each top rod seat is not higher than the upper surface of the table top;

[0008] A plurality of machining tools are matched with the number of machining holes and are respectively installed on the frame above the corresponding machining holes for machining the spin-off cover blank on the corresponding top rod seat;

[0009] A feeding mechanism can drive the spin-off cover blank to be machined to move one by one in the direction of the feeding hole.

[0010] The main motor drives the conveying mechanism through a transmission mechanism to intermittently operate, the conveying mechanism includes a plurality of conveying wheels installed on the frame above the table top and a conveying belt wound around the conveying wheels, a plurality of through holes for the spin-off cover blank to sit on are sequentially opened in the length direction of the conveying belt, and one section of the conveying belt can be laid on the table top, the feeding hole, the machining hole and the corresponding through hole on the section of the conveying belt in the stopped state on the table top correspond to each other, and the intermittent operation of the conveying belt can convey the spin-off cover blank carried by the feeding mechanism to the downstream machining holes one by one.

[0011] Meanwhile, a discharging mechanism is arranged below the table top, which can separate the processed spin-off cover product on the conveying belt from the conveying belt.

[0012] In the above scheme, in order to further improve the accuracy and reliability of the beat, further optimization is that the lower end of each top rod seat is fixed on the corresponding main cylinder, the piston rod of each main cylinder is supported on the corresponding main cam, and a sealed cavity that can at least seal the local part of each main cylinder and is pre-set with a certain pressure is arranged in the frame, a gas hole is opened on the wall surface of the cylinder body of each main cylinder to communicate the sealed cavity and the inner cavity of the main cylinder, so that the piston rod of each main cylinder always has the tendency to fit and contact with the peripheral surface of the corresponding main cam.

[0013] In the above optimization scheme, the lower end of the piston rod of each main cylinder is provided with a first fixed seat, a first rolling body fitting the peripheral surface of the corresponding main cam and a second and third rolling body respectively located on the two sides of the corresponding main cam are installed on the first fixed seat, and the second and third rolling bodies can roll on the end face of the corresponding side of the corresponding main cam to reduce the resistance during movement, so that the lifting work can be smoothly carried out.

[0014] In the above improvement, two side end faces of each main cam are respectively provided with main raceways for the second and third rolling bodies to roll, and the shape of each main raceway is consistent with the profile shape of the corresponding main cam. The use of the two side main raceways makes the limiting effect better and the rolling smoother.

[0015] In the above solutions, further improvement is that the feeding mechanism comprises a feeding channel with a blank hole, a pushing structure for pushing the rotating cover blank at the blank hole into the through hole of the conveying belt above the feeding hole, the pushing structure comprises an eccentric wheel mounted on the main shaft, a lifting link assembly supported on the eccentric wheel and capable of moving up and down with the rotation of the eccentric wheel, and a pressing head linked with the lifting link assembly, the blank hole penetrates the feeding channel up and down, and the blank hole is located above the section of the conveying belt above the feeding hole, and the pressing head is located above the blank hole, and when the pressing head moves down, the rotating cover blank at the blank hole can be pressed into the through hole of the conveying belt above the feeding hole. In this way, the pushing structure is linked with other main cams on the main shaft, the feeding operation is consistent with the pace of the feeding and lifting operation, and the accuracy of the overall operation is further improved.

[0016] In order to prevent the rotating cover blank pressed into the through hole from moving up with the pressing head, a pressing cover is laid on the feeding channel, the pressing cover is provided with a pressing strip extending to the blank hole and located below the pressing head, and the pressing head is provided with a avoiding channel for the pressing strip to pass up and down.

[0017] In order to avoid the incomplete feeding phenomenon, a material positioning cylinder is installed above the feeding channel, the piston rod of the material positioning cylinder extends up and down to release or press the rotating cover blank adjacent to the blank hole. By controlling the material positioning cylinder, the rotating cover blank can enter the blank hole in time and completely.

[0018] In order to prevent the rotating cover blank pressed into the through hole from moving up with the pressing head, a pressing cover is laid on the feeding channel, the pressing cover is provided with a pressing strip extending to the blank hole and located below the pressing head, and the pressing head is provided with a avoiding channel for the pressing strip to pass up and down.

[0019] Preferably, a power source is also configured to drive the rotating cover blank to be machined to move forward in the feeding channel to the blank hole. The power source is preferably the pressure gas sprayed from the air nozzle, and the air nozzle is connected to the air source through the air pipe. The driving effect is good and the cost is low.

[0020] In order to make the later forming device have more functions, the glue injection mechanism can also be included, and corresponding, the table top is also provided with glue injection holes located downstream of the processing holes and corresponding to the through holes on the conveying belt, the glue injection mechanism includes a glue injection cam mounted on the main shaft, a vertical shaft supported on the glue injection cam and located below the glue injection hole, and a glue injection head, the top of the vertical shaft is provided with a glue injection tray capable of shuttling in the glue injection hole and not higher than the upper surface of the table top in the non-working state, and the glue injection head is mounted on the rack above the table top, the glue injection head is connected with the glue source through the glue pipe to inject glue to the screw cap semi-finished product on the glue injection tray ejected from the through hole of the conveying belt. Thus, the driving mechanism can also serve as the driving mechanism of the glue injection station, which can ensure the accuracy and reliability of the glue injection operation and other crimping operations.

[0021] In order to make the vertical shaft also reliably and consistently fit the peripheral surface of the glue injection cam, further improvement is that the lower end of the vertical shaft is supported on the glue injection cam through a piston rod of a glue injection cylinder, the glue injection cylinder is at least partially located in the sealing cavity, a gas channel is opened on the cylinder wall surface of the glue injection cylinder and communicates with the sealing cavity and the inner cavity of the glue injection cylinder, so that the piston rod of the glue injection cylinder also has the tendency to consistently fit the peripheral surface of the glue injection cam.

[0022] In order to ensure the uniformity of glue injection, it is better to make the vertical shaft rotate while moving up and down, for this purpose, the vertical shaft is designed as a spline shaft matched with a spline sleeve, the lower part of the vertical shaft is supported on the piston rod of the glue injection cylinder through a lower bearing, the spline sleeve is supported on a bearing seat through an upper bearing, the middle part of the vertical shaft is also sleeved with a transmission wheel fixed with the spline sleeve, and a first motor is installed on the rack to drive the transmission wheel to rotate through a transmission structure.

[0023] Similarly, in order to reduce the movement resistance, the lower end of the piston rod of the glue injection cylinder is provided with a second fixed seat, the fourth rolling body fitting the peripheral surface of the glue injection cam and the fifth and sixth rolling bodies located on both sides of the glue injection cam are installed on the second fixed seat, the two side end faces of the glue injection cam are respectively provided with glue injection rolling grooves for the fifth and sixth rolling bodies to roll, and the shape of each glue injection rolling groove is consistent with the profile shape of the peripheral surface of the glue injection cam.

[0024] In the above schemes, further optimization is that the blanking mechanism includes a conveying belt winding around the driving and driven wheels and driven to meander by the second motor, a magnetic plate adjacent to the conveying belt is arranged below the bearing surface of the conveying belt, and the magnetic plate can adsorb the finished screw cap product on the conveying belt to the conveying belt.

[0025] A further improvement in the above solutions is that the ejector seat includes a main tray, a hollow lower mold, and an ejector rod. The lower mold is fixed to the piston rod of the main cylinder. A positioning strip is also fixed to the top of the cylinder body of the main cylinder. A clearance groove is opened on the piston rod of the main cylinder for the positioning strip to pass through radially and move up and down relative to each other. The ejector rod is inserted vertically into the lower mold. The upper end of the ejector rod is fixed to the main tray. A compression spring is also fitted on the ejector rod. The compression spring makes the ejector rod always tend to move downward and abut against the positioning strip. When the highest point of the main cam is gradually in a low position, the top surface of the main tray on the ejector rod is flush with the top of the lower mold; when the highest point of the main cam is gradually in a high position, the top surface of the main tray is lower than the top of the lower mold. By using compression springs and positioning bars, the push rod and main tray can move up and down relative to the lower mold, so that the top surface of the main tray and the top of the lower mold are flush or have a height difference, so as to meet the movement and processing positioning of the spun cap blank under different working conditions.

[0026] Compared with the prior art, this utility model also uses a main motor to drive the main shaft, the rotation of each main cam, and the intermittent operation of the conveyor belt to transport the spun cap blank in the through hole of the conveyor belt laid on the table to the corresponding processing position. At the same time, each main cam rotates to the top rod seat on it and rises into place, and cooperates with the corresponding processing fixture to complete the processing at the corresponding work position. Therefore, this utility model can also ensure the accuracy and reliability of the feeding and lifting operation rhythm. Moreover, since the conveyor belt operates intermittently and transports the spun cap blank, the overall structure is simpler and easier to adjust, control and implement, which is conducive to the promotion and application of this equipment. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the main structure of an embodiment of the present utility model;

[0028] Figure 2 for Figure 1 Mid-top view;

[0029] Figure 3 for Figure 1 A 3D schematic diagram after removing the panel;

[0030] Figure 4 for Figure 3 A rear-view stereoscopic diagram;

[0031] Figure 5 for Figure 2 Schematic diagram of the sectional view along the central AA direction;

[0032] Figure 6 This is a cross-sectional schematic diagram of the push rod seat, main cylinder, etc. in the drive mechanism;

[0033] Figure 7 is a schematic view of the enlarged I part in Figure 3 ;

[0034] Figure 8 is a schematic view of the enlarged I part in Figure 1 ;

[0035] Figure 9 is a schematic view of the enlarged I part in Figure 8 ;

[0036] Figure 10 is a schematic view of the enlarged I part in ;

[0037] Figure 11 is a schematic view of the enlarged I part in Specifically

[0038] The utility model is further described in detail below in combination with the drawings.

[0039] In the following description of the embodiments, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "axial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the utility model and simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, since the disclosed embodiments of the utility model can be arranged in different directions, so these directional terms are only used as an illustration and should not be regarded as a limitation, for example, "upper", "lower" are not necessarily limited to the direction opposite or consistent with the direction of gravity. In addition, the features defined as "first", "second" can explicitly or implicitly include one or more features.

[0040] As shown in Figures 1 to 11 , a post-forming device for spin-on caps is used to further process a spin-on cap blank 100, which comprises a rack 1, a driving mechanism 2, a plurality of processing tools 3, a conveying mechanism 4, a feeding mechanism 5 and a discharging mechanism 6, wherein the plurality of processing tools can be determined according to the specific processing needs of the spin-on cap, in the embodiment, the plurality of processing tools are respectively a pre-rolling tool 3a, a rolling tool 3b and a rolling claw tool 3c, and a glue injection mechanism 7 is additionally provided on the rack, and of course the glue injection mechanism 7 can also be cancelled.

[0041] Specifically, the aforementioned frame 1 includes a frame body and a panel 11, side panels 12, back panel 13, and bottom plate 14 covering the frame body. The panel 11 may be designed with an observation window to allow the operator to clearly see the operation of the internal components. The side panels 12, back panel 13, and bottom plate 14 can shield the interior of the frame body, serving as dust protection, etc. Of course, they can also be partially opened as needed to facilitate heat dissipation or maintenance. In this embodiment, a platform 15 is provided in the middle of the frame body. The platform 15 is designed with loading holes 151 and several processing holes arranged sequentially along the horizontal direction. The number of processing holes can be determined according to the number of the aforementioned tooling fixtures. Considering the specific design of the aforementioned processing fixtures and the glue injection requirements, the platform 15 is designed from left to right with loading holes 151, pre-rolling processing holes 152, edge-rolling processing holes 15, claw-rolling processing holes 154, and glue injection holes 155 (see [link to documentation]). Figure 1 Of course, the order of the aforementioned holes can also be distributed from right to left as needed. The frame also includes a vertical plate 16 located within the frame body behind the table 15. This vertical plate 16 divides the interior of the frame body into a front section and a rear section. The table 15 further divides the front section into an upper section above the table 15 and a lower section below the table 15. Those skilled in the art will understand that the structure of this frame can be varied, and the areas and shapes can be divided as needed.

[0042] The aforementioned drive mechanism 2 is installed at the lower part of the aforementioned frame 1. It includes a main motor 21 and a main shaft 22 linked to the main motor. Specifically, the main motor 21 is installed on the base plate 14 behind the vertical plate 16. The main shaft 22 is supported by a main bearing on two vertical plates 17 located in the lower region (the vertical plates are fixed to the base plate). Considering the excessive length of the main shaft 22, it is composed of two short shafts connected in series by a coupling 23. The output shaft of the main motor 21 drives the main shaft 22 to rotate through the first pulley group 24. Multiple main cams 25 corresponding to the number of machining holes are installed on the main shaft 22. Each main cam 25 supports a push rod seat 26 located below the corresponding machining hole and capable of passing through the corresponding machining hole. In the non-working state, the top of each push rod seat 26 is not higher than the upper surface of the table 15. Specifically, in conjunction with the aforementioned machining holes, there are three main cams 25, namely a pre-coiling cam 25a, an edge-coating cam 25b, and a claw-coating cam 25c (see [link to documentation]). Figure 3 The corresponding push rod seats 26 are pre-coil push rod seat 26a, edge-coil push rod seat 26b, and claw push rod seat 26c (see [link to relevant documentation]). Figure 5 Considering that each push rod seat 26 can smoothly cooperate with the corresponding main cam 25, this utility model has been further optimized, that is, the lower end of each push rod seat 26 is fixed to the upper end of the piston rod 272 of the corresponding main cylinder 27. For details, please refer to [link to relevant documentation]. Figure 6The lower end of the piston rod 272 of each main cylinder 27 is supported on the corresponding main cam 25. To ensure reliable engagement between the lower end of the piston rod 272 and the corresponding main cam 25, a first fixed seat 273 is mounted on the lower end of the piston rod of each main cylinder 27 via a first cylinder liner 277 and a first pin 278. A first rolling element 274, which fits against the circumferential surface of the corresponding main cam 25, and a second rolling element 275 and a third rolling element 276, respectively located on both sides of the corresponding main cam 25, are mounted on the first fixed seat 273. The second and third rolling elements can roll on the corresponding end faces of the corresponding main cam 25. Furthermore, to ensure that the second and third rolling elements move along a trajectory consistent with the circumferential contour, a main raceway 251 for the second and third rolling elements to roll is further optimized on both end faces of the corresponding main cam 25. The shape of each main raceway 251 is consistent with the circumferential contour shape of the corresponding main cam 25. The rolling element can be in the form of a roller, ball bearing, etc. To ensure that the first rolling element 274 always fits against the circumferential surface of the corresponding main cam 25, in addition to the springs used in the prior art, this embodiment further optimizes the structure. Specifically, a sealing cavity 18 is provided in the lower region of the frame 1 using a partition. This sealing cavity 18 can at least seal and enclose a portion of each main cylinder 27 (i.e., allow each main cylinder 27 to pass through the sealing cavity 18). Each main cylinder 27 has an air hole 2711 on its cylinder body 271 that connects the sealing cavity 18 and the inner cavity of the main cylinder 27. Furthermore, the sealing cavity 18 is pre-pressurized with a certain pressure. Specifically, an intake pipe and an exhaust pipe connected to a gas source can be connected to the side wall of the sealed cavity 18. An intake valve and a pressure gauge can be installed on the intake pipe, and an exhaust valve can be installed on the exhaust pipe. By controlling the intake and exhaust valves, the pressure in the sealed cavity 18 can be maintained at a certain preset pressure. Gas at this preset pressure can enter the inner cavity of each main cylinder 27, pushing the piston and the corresponding piston rod 272 to move down synchronously. This ensures that the first rolling element 274 on the piston rod 272 of each main cylinder 27 always tends to be in contact with the circumferential surface of the corresponding main cam 25. Obviously, using this method of supplying air to each main cylinder 27 from the same sealed cavity 18 further improves the consistency and accuracy of the action rhythm of each push rod seat 26.

[0043] Furthermore, in this embodiment, the aforementioned push rod seat 26 has been further improved. Since the pre-coil push rod seat 26a, the edge-rolling push rod seat 26b, and the claw-rolling push rod seat 26c have the same structure, only one push rod seat 26 will be described here as an example. For details, please refer to [link to relevant documentation]. Figure 6The ejector seat 26 includes a main tray 261, a hollow lower mold 262, and an ejector rod 263. The lower mold 262 can be directly fixed to the piston rod 272 of the main cylinder 27. However, for ease of processing and assembly, in the figure, the lower mold 262 is fixed to the piston rod 272 of the main cylinder 27 via a similarly hollow lower mold mounting seat 264. Specifically, the lower mold 262 is threaded onto the lower mold mounting seat 264. The lower mold mounting seat 264 has multiple mounting holes around its perimeter. Bolts pass through the mounting holes and the end cap 265 described below, and are then threaded onto the piston rod 272 of the main cylinder 27. That is, the lower mold 262 and the lower mold mounting seat 263... 4. The piston rod 272 of the main cylinder 27 and the end cap 265 located at the top of the piston rod 272 are fixed together. In order to prevent the piston rod 272 of the main cylinder 27 from moving excessively outward beyond the cylinder body 271 of the main cylinder, a positioning strip 266 is also fixed at the top of the cylinder body 271 of the main cylinder. A clearance groove 2721 is opened on the piston rod 272 of the main cylinder, through which the positioning strip 266 passes radially and can move up and down relative to each other. The end cap 265 covers the upper end of the clearance groove 2721 (it can be understood that when the end cap 265 is designed as an integral part with the piston rod 272 of the main cylinder, the clearance groove is in the form of a closed hole). Due to the presence of the end cap 265 and the positioning strip 2721, the piston rod 272 of the main cylinder can only move up and down within the height range limited between the end cap 265 and the bottom of the clearance groove 2721. The aforementioned ejector rod 263 is vertically inserted into the lower mold 262 and the lower mold mounting base 264. The lower end of the ejector rod 263 passes through the end cover 265 and abuts against the positioning strip 266. The upper end of the ejector rod 263 is fixed with the main tray 261, that is, the main tray 261 is located in the lower mold 262. At the same time, a compression spring 267 is sleeved on the ejector rod 263. The upper end of the compression spring 267 abuts against the inner wall step of the lower mold mounting base 264, and the lower end of the compression spring 267 abuts against the flange of the ejector rod 263, so that the ejector rod 263 always has a downward tendency so that the lower end of the ejector rod 263 can abut against the positioning strip 266. During operation, when the highest point of the main cam 25 gradually moves to a lower position, that is, when the piston rod 272 of the main cylinder 27 corresponding to the main cam 25 gradually moves down to a lower position, the positioning bar 266 pushes the push rod 263 upward and presses the compression spring 267, so that the top surface of the main tray 261 on the push rod 263 is flush with the top of the lower mold 262, ensuring that the spun cap 100 to be processed will not tilt when it moves on the main tray and the lower mold. Otherwise, the spun cap 100 to be processed cannot enter the upper mold of the corresponding processing fixture 3.As the highest point of the main cam 25 gradually reaches its high position, the piston rod 272 of the main cylinder 27 corresponding to the main cam 25 also gradually moves upward and reaches its high position. At this time, the lower end of the push rod 263 no longer abuts against the positioning strip 266. Under the action of the restoring force of the compression spring 267, the push rod 263 moves downward, and the main tray 261 also moves downward, so that the top surface of the main tray 261 is lower than the top of the lower mold 262. That is, there is a certain height difference (2mm in the figure) between the main tray 261 and the lower mold 262. After the lower end of the ejector rod abuts against the positioning strip, the ejector rod and the main tray no longer move downward relative to the lower mold. Instead, they move upward together with the lower mold as the piston rod of the main cylinder moves upward. This ensures that the lower mold 262, ejector rod 263, and main tray 261 move upward to lift the spun cap blank 100 being processed. At the same time, the height difference between the top surface of the main tray 261 and the top of the lower mold helps to place the spun cap blank stably on the main tray 261, ensuring stability during the processing.

[0044] The number of the aforementioned machining fixtures 3 corresponds to the number of machining holes, as shown in the figure: pre-rolling fixture 3a, edge-rolling fixture 3b, and jaw-rolling fixture 3c (see [reference]). Figure 3 , 5 These machining fixtures are installed on the frame 1 located above the corresponding machining holes, i.e., in the upper area. These machining fixtures are all existing technology and are used to process the pre-rolling, rolling, and curling of the unscrew cap blank 100 on the corresponding push rod seat 26. Among them, the corresponding pre-rolling fixture 3a and the rolling fixture 3b are also equipped with corresponding variable frequency motors 31 on the frame (see [link to relevant documentation]). Figure 4 Each variable frequency motor 31 is mounted on the upright plate 16 and located in the rear area. Each variable frequency motor 31 is connected to the rotating shaft 32 of the corresponding tooling through its own transmission component (such as a pulley set), so that the rotating shaft 32 rotates to realize the edge rolling on the circumference of the unscrew cover blank. Since its structure and working principle are existing technologies, they will not be described in detail here.

[0045] The aforementioned conveying mechanism 4 is located in the upper region of the frame 1. This conveying mechanism 4 includes multiple conveyor wheels 41 and conveyor belts 42 wound around each conveyor wheel. The conveying mechanism is driven intermittently by the main motor 21 via a transmission mechanism 28. Specifically, the transmission mechanism 28 includes a divider 281 mounted on the frame 1 and a second pulley assembly. The divider 281 allows the conveyor belt 42 to remain at each hole on the platform 15 for the required time. The first pulley 282 of the second pulley assembly is mounted on the main shaft 22, and the second pulley 283 is mounted on the input end of the divider 281. The second belt 284 of the second pulley assembly is wound around the first pulley 282 and the second pulley 283 (see [link to relevant documentation]). Figure 4The output end of the divider 281 is equipped with one of the aforementioned multiple conveyor wheels 41, making that conveyor wheel the driving conveyor wheel 411, and the remaining conveyor wheels the driven conveyor wheels 412. Figure 3 and Figure 5 As can be seen, there are three driven conveyor wheels 412, which are distributed together with the driving conveyor wheels 411 at the four corners of the upper area. Of course, if needed, there can also be four or five driven conveyor wheels. Multiple conveyor wheels 41 are mounted on the vertical plate 16, and the axes of each conveyor wheel are arranged in a front-to-back direction so that a section of the conveyor belt 42 wound around each conveyor wheel 41 can be laid on the aforementioned platform 15. Multiple through holes 421 are sequentially opened along the length of the conveyor belt 42 for the unscrewed cover blank 100 to sit on. When the conveyor belt 42 is in a stopped state due to the intermittent operation driven by the main motor 21, the second pulley group, and the divider 281, the loading hole 151, each processing hole (indicated by numbers 152, 153, and 154), and the glue injection hole 155 on the platform 15 correspond vertically to the corresponding through holes on that section of the conveyor belt.

[0046] The aforementioned feeding mechanism 5 can drive the unscrew-top blanks 100 to be processed to move one by one toward the aforementioned loading hole 151, and can drop the unscrew-top blanks 100 into the corresponding through holes 421 of the aforementioned conveyor belt 42. For details, please refer to [link to relevant documentation]. Figure 3 , Figure 7 and Figure 8 The feeding mechanism 5 includes a feeding channel 51 with a discharge hole 511 and a pushing structure 52 that pushes the unscrewed blanks at the discharge hole 511 into the through holes of the conveyor belt one by one. The discharge hole 511 extends vertically through the feeding channel 51 and is located on the section of the conveyor belt above the loading hole 151. The pushing structure 52 includes an eccentric wheel 521, a lifting linkage assembly, and a pressing head 522. The eccentric wheel 521 is mounted on the main shaft 22, meaning that the eccentric wheel 521 is coaxially mounted with each of the main cams 25 and can move together. The lifting linkage assembly is supported on the eccentric wheel 521 and can move up and down with the rotation of the eccentric wheel 521 (also known as a crank-rocker mechanism). Specifically, the lifting linkage assembly includes a connecting rod 523 whose lower end is supported on the eccentric wheel 521 and a lifting rod 524 hinged to the upper end of the connecting rod 523 (see [link to relevant documentation]). Figure 8 The lifting rod 524 passes through the upright guide cylinder 525. A pressing head 522 is provided at the upper end of the lifting rod 524. The pressing head 522 is located above the discharge hole 511 so that when it moves downward, it can press the unscrew cap blank 100 that enters from the feed channel 51 into the through hole 421 of the conveyor belt above the loading hole 151. Then, the conveyor belt 42 intermittently moves to transport the unscrew cap blank 100 fed by the feeding mechanism to several downstream processing holes in sequence.

[0047] To ensure that the unscrew-top blanks in the feed channel 51 can move smoothly and sequentially toward the discharge hole 511, a power source is also provided on the frame 1. This power source can be pressurized gas ejected from the air nozzle 53, which is connected to the air source via an air pipe. Alternatively, it can be a cylinder or other power device.

[0048] Considering that the unscrew-opening blank 100 may get stuck in the through hole 421 of the conveyor belt, in order to promptly stop the conveyor belt 42 from continuing to operate when this happens, this embodiment further improves the design by mounting the pressing head 522 on the piston rod of a magnetic cylinder 54, with the cylinder body of the magnetic cylinder 54 fixed to the lifting rod 524. Thus, when a stuck cap occurs, the stuck unscrew-opening blank will push the piston rod of the magnetic cylinder 54 upwards, thereby triggering the magnetic switch on the magnetic cylinder 54. Upon receiving this signal, the controller can stop the main motor 21 and other related components from operating.

[0049] During production, if subsequent screw-on cap blanks enter the discharge hole 511 above the conveyor belt too quickly or too slowly, the pressing head 522 may press down on half of the screw-on cap blank 100. To ensure that subsequent screw-on cap blanks enter the discharge hole 511 above the conveyor belt on time and accurately, a fixed-position cylinder 55 is installed above the aforementioned feeding channel 51. The piston rod of the fixed-position cylinder 55 extends and retracts to release or press down on the screw-on cap blanks adjacent to the discharge hole 511. In use, the piston rod of the fixed-position cylinder 55 can only move upward when the previous screw-on cap blank has been conveyed away. With the action of the power source, the screw-on cap blank 100 is fully positioned above the through hole 421 of the conveyor belt 42, at which point the pressing head 522 falls down and presses it into the through hole 421.

[0050] Furthermore, considering that when the pressure head 522 is raised, friction and other factors may cause the unscrew cap blank 100 pressed into the through hole to be lifted, this embodiment also provides a pressure cover 56 on the aforementioned feed channel 51. The pressure cover 56 has a holding strip 561 extending towards the discharge hole 511 and located below the pressure head 522. The pressure head 522 has a clearance channel 5221 for the holding strip to pass vertically. The holding strip 561 is designed in a Y-shape, but it can also be straight or other shapes. In use, even if the unscrew cap blank 100 in the through hole 421 follows upwards when the pressure head 522 is raised, the holding strip 561 will block the unscrew cap blank 100 from below, allowing the pressure head 522 to move upwards without being affected.

[0051] The aforementioned glue injection mechanism 7 includes a glue injection cam 71 mounted on the main shaft 22, a vertical shaft 72 supported on the glue injection cam 71, and a glue injection head 73 located in the upper region. Please refer to [link to relevant documentation]. Figure 3 , Figure 5 and Figure 11 The vertical shaft 72 is located below the glue injection hole 155 on the table 15. The top of the vertical shaft 72 is equipped with a glue injection tray 74 that can pass through the glue injection hole 155 and does not exceed the upper surface of the table 15 when not in operation. The glue injection head 73 is supported on the upright plate 16 by the glue injection seat 75. The glue injection head 73 is connected to the glue source through the glue tube to inject glue into the unscrewed cap semi-finished product on the glue injection tray 74 that is pushed out of the through hole of the conveyor belt.

[0052] Similarly, considering that the vertical shaft 72 can smoothly cooperate with the glue injection cam 71, this utility model has also been further optimized. That is, the lower end of the vertical shaft 72 is supported on the glue injection cam 71 by the piston rod 761 of the glue injection cylinder 76. The glue injection cylinder 76 is at least partially located in the aforementioned sealing cavity 18. An air passage 7621 communicating with the sealing cavity 18 and the inner cavity of the glue injection cylinder 76 is opened on the wall of the cylinder body 762 of the glue injection cylinder 76. Similarly, the pressure in the sealing cavity 18 is used to act on the piston 761 of the glue injection cylinder 76, thereby pushing the piston rod 761 of the glue injection cylinder 76 to move downward, so that the lower end of the piston rod 761 of the glue injection cylinder 76 always tends to be in contact with the circumferential surface of the glue injection cam 71.

[0053] To ensure the glue is evenly applied to the desired areas of the unscrew-top semi-finished product, it is best to rotate either the glue dispensing head 73 or the unscrew-top semi-finished product. In the diagram, the unscrew-top semi-finished product rotates, which means the glue dispensing tray 74 and the vertical shaft 72 rotate. To enable the vertical shaft 72 to both rotate and move up and down, in this embodiment, the vertical shaft 72 is designed as a spline shaft that mates with the spline sleeve 721. The lower part of the vertical shaft 72 is supported on the piston rod 761 of the glue dispensing cylinder 76 by a lower bearing (see [link]). Figure 11 A spline sleeve 721, fitted onto the upper part of the vertical shaft 72, is supported on a bearing seat 77 by an upper bearing. The bearing seat 77 is equipped with photoelectric sensors 771 for detecting the unscrewed semi-finished product. Each photoelectric sensor 771 is inserted into a corresponding detection hole in the glue-filling base plate 78 on the table 15. A transmission wheel 79, fixed to the spline sleeve 721, is also fitted onto the middle part of the vertical shaft 72. Simultaneously, a first motor 70, which drives the transmission wheel 79 to rotate via a transmission structure, is installed in the rear area of ​​the frame 1 (see [link to relevant documentation]). Figure 4In this embodiment, the transmission structure also uses a pulley system, so the aforementioned transmission wheel is a transmission pulley. Of course, gears can also be used to achieve linkage when needed. Thus, the rotation of the first motor 70 drives the transmission wheel 79 to rotate through the transmission structure, thereby causing the vertical shaft 72, the glue injection tray 74, and the unscrewed cap semi-finished product on the glue injection tray 74 to rotate together. At the same time, when the glue injection cam 71 rotates, the vertical shaft 72, pushed by the piston rod 761 of the glue injection cylinder 76, can also achieve the above-mentioned movement, so as to realize the lifting and lowering of the glue injection tray 74 and the unscrewed cap semi-finished product on it.

[0054] Similarly, considering the reliable contact between the lower end of the piston rod 761 of the injection cylinder 76 and the injection cam 71, a second fixed seat 765 is installed at the lower end of the piston rod of the injection cylinder 76 via a second cylinder sleeve 763 and a second pin 764. A fourth rolling element 765, which is in contact with the circumferential surface of the injection cam 71, and a fifth rolling element 767 and a sixth rolling element 768 located on both sides of the injection cam 71 are installed on this second fixed seat 765. Likewise, injection raceways 711 for the fifth and sixth rolling elements to roll are respectively opened on the two end faces of the injection cam 71 (see [link to relevant documentation]). Figure 5 The shape of each injection roller 711 is also consistent with the circumferential contour shape of the injection cam 71. This design allows the injection cam 71 to move in tandem with each main cam 25, and to use the same sealed cavity 18 to supply air to each main cylinder 27 and injection cylinder 76, which can further improve the consistency and accuracy of the timing of the edge rolling, claw rolling and injection actions.

[0055] The aforementioned unloading mechanism 6 is located below the table 15, i.e., in the lower region. It allows the finished screw-on caps on the conveyor belt 42 to detach from the conveyor belt 42. Specifically, the unloading mechanism 6 includes a conveyor belt 63 that is wound around the drive wheel 61 and the driven wheel 62 and is driven by a second motor (not shown in the figure) to rotate in a meandering manner. A magnetic plate 64 is arranged below the bearing surface of the conveyor belt 63, adjacent to the conveyor belt. The magnetic plate 64 can attract the finished screw-on caps on the conveyor belt and transport them into a container connected to the conveyor belt as the conveyor belt rotates.

[0056] Meanwhile, considering that the eccentric wheel 521, each main cam 25 and the glue injection cam 71 need to be continuously lubricated, a drive sprocket 8 is also installed on the main shaft 22, and a driven sprocket 9 is installed on the vertical plate 16 and located in the rear area. The chain (not shown in the figure) is wound around the drive and driven sprockets, and the driven sprocket 9 is installed on the oil pump shaft (not shown in the figure). In this way, as the main shaft 22 rotates, it can drive the oil pump to work, and then add lubricating oil to the eccentric wheel 521, each main cam 25 and the glue injection cam 71 through the oil pipe.

[0057] Meanwhile, considering that the aforementioned conveyor belt 42, conveyor belt 63, and first and second pulley groups will loosen after working for a period of time, corresponding tensioning devices will be configured. These are all existing technologies and will not be described in detail here.

[0058] In operation, with the start of the main motor 21, the main shaft 22 is driven to rotate via the first pulley group 24, which in turn causes the eccentric wheel 521, each main cam 25, and the glue injection cam 71 to rotate together, thereby causing the lifting linkage assembly, each top rod seat 26, and the vertical shaft 72 to move up and down. At the same time, the start of the main motor 21 causes the conveyor belt to run intermittently via the second pulley group and the divider 281. Meanwhile, the unscrew cap blanks 100 are fed one by one into the section of conveyor belt above the loading hole via the feeding channel 51, and pressed into the corresponding through holes 421 by the pressing head 522. Subsequently, with each rotation of the conveyor belt 42, the unscrew cap blanks from the previous processing station are transported to the next processing station. That is, the unscrew cap blanks 100 above the loading hole 151 are transported to the area above the pre-rolling processing hole 152, the unscrew cap blanks 100 above the pre-rolling processing hole 152 are transported to the area above the edge-rolling processing hole 153, the unscrew cap blanks 100 above the edge-rolling processing hole 153 are transported to the area above the claw-rolling processing hole 154, and so on. The semi-finished screw-on cap is transported to the top of the glue injection hole 155. The finished screw-on cap above the glue injection hole 155 is transported to the top of the conveyor belt 63. When the conveyor belt is stopped, each top rod seat 26 and vertical shaft 72 rises, lifting the screw-on cap blank at the corresponding position and disengaging it from the corresponding through hole 421. When the screw-on cap blank 100 after being lifted touches the corresponding tooling above, the corresponding variable frequency motor 31 drives the rotating shaft 32 of the corresponding tooling to rotate through the transmission component to realize the pre-rolling and rolling operations. At the same time, the rolling claw tooling 3c also performs synchronous rolling operations. The glue injection head 73 starts to inject glue, and under the drive of the first motor 70, the glue injection tray 74 rotates to complete the full circle of glue application. Simultaneously, the pressing cylinder on the feeding channel 51 actuates, releasing the pressed screw-on cap blank. Under the action of the power source, another screw-on cap blank enters the discharge hole 511 and is pressed into the through hole 421 above the loading hole by the pressing head 522. Meanwhile, the finished screw-on caps above the conveyor belt 63 are attracted to the conveyor belt 63 by the magnetic plate 64. As the second motor rotates, the conveyor belt 63 runs, and the finished screw-on caps are collected in the container. This cycle repeats continuously, realizing the post-processing of screw-on caps with high production efficiency and guaranteed product quality.

Claims

1. A post-forming device for a screw-on cap, comprising: The frame (1) has a table (15) on which loading holes (151) and several processing holes are arranged in a transversely spaced manner. The drive mechanism (2) is installed at the lower part of the frame (1) and includes a main motor (21) and a main shaft (22) that is linked to the main motor (21). Multiple main cams (25) corresponding to the number of machining holes are installed on the main shaft (22). Each main cam (25) is supported by a push rod seat (26) located below the corresponding machining hole and able to pass through the corresponding machining hole. In the non-working state, the top of each push rod seat (26) is not higher than the upper surface of the table (15). Multiple machining fixtures (3), the number of which matches the number of machining holes, are respectively installed on the frame (1) located above the corresponding machining holes, for machining the unscrew cap blank (100) on the corresponding top rod seat (26); The feeding mechanism (5) can drive the unscrewed blanks (100) to be processed to move one by one toward the feeding hole (151) mentioned above; Its features are: It also includes a conveying mechanism (4) that is driven intermittently by the main motor (21) through the transmission mechanism (28). The conveying mechanism includes multiple conveying wheels (41) mounted on the frame (1) above the table (15) and a conveyor belt (42) wound around each conveying wheel. Multiple through holes (421) for the unscrew cap blank (100) to sit on are sequentially opened along the length direction on the conveyor belt. A section of the conveyor belt (42) can be laid on the table (15). The loading hole (151) and each processing hole on the table (15) correspond vertically to the corresponding through hole (421) on the section of the conveyor belt when it is stopped. The intermittent operation of the conveyor belt (42) can sequentially transport the unscrew cap blank (100) carried by the feeding mechanism (5) to the downstream processing holes. It is also equipped with a feeding mechanism (6), which is located below the table (15) and can allow the finished unscrew caps on the conveyor belt to be removed from the conveyor belt (42).

2. The post-forming device for unscrewing caps according to claim 1, characterized in that: The lower end of each of the top rod seats (26) is fixed on the piston rod (272) of the corresponding main cylinder (27). The piston rod of each main cylinder (27) is supported on the corresponding main cam (25). A sealing cavity (18) with a certain pressure is provided in the frame (1) to seal and surround at least a part of each main cylinder (27). A vent hole (2711) is opened on the wall of the cylinder body of each main cylinder (27) to connect the sealing cavity (18) and the inner cavity of the main cylinder (27), so that the piston rod of each main cylinder (27) always tends to fit and contact the circumferential surface of the corresponding main cam (25).

3. The post-forming device for unscrewing caps according to claim 2, characterized in that: Each main cylinder (27) has a first fixed seat (273) installed at the lower end of the piston rod. A first rolling element (274) that fits against the circumferential surface of the corresponding main cam (25) and a second rolling element (275) and a third rolling element (276) located on both sides of the corresponding main cam (25) are installed on the first fixed seat (273). The second and third rolling elements can roll on the end face of the corresponding side of the corresponding main cam (25).

4. The post-forming device for unscrewing caps according to claim 3, characterized in that: Each of the main cams (25) has a main raceway (251) on each of its two end faces for the second and third rolling elements to roll, and the shape of each main raceway (251) is consistent with the circumferential contour shape of the corresponding main cam (25).

5. The post-forming apparatus for the screw-on cap according to any one of claims 1 to 4, characterized in that: The feeding mechanism (5) includes a feeding channel (51) with a discharge hole (511), a pushing structure (52) that pushes the unscrew-opening blanks (100) at the discharge hole (511) into the through hole (421) of the conveyor belt above the loading hole (151) one by one. The pushing structure includes an eccentric wheel (521) mounted on the main shaft (22), a lifting linkage assembly supported on the eccentric wheel (521) and capable of moving up and down with the rotation of the eccentric wheel (521), and a lifting linkage assembly connected to the lifting mechanism. The pressing head (522) is linked to the lowering linkage assembly. The dropping hole (511) is vertically connected to the feeding channel (51), and the dropping hole (511) is located on the section of the conveyor belt above the feeding hole (151). The pressing head (522) is located above the dropping hole (511). When the pressing head (522) moves down, it can press the unscrew cap blank (100) at the dropping hole (511) into the through hole (421) of the conveyor belt above the feeding hole (151).

6. The post-forming device for unscrewing caps according to claim 5, characterized in that: The feeding channel (51) is also covered with a pressing cover (56), which has a pressing strip (561) extending toward the dropping hole (511) and located below the pressing head (522). The pressing head (522) has a clearance channel (5221) for the pressing strip (561) to pass through in the vertical direction.

7. The post-forming device for unscrewing caps according to claim 5, characterized in that: A fixed-feed cylinder (55) is installed above the feeding channel (51). The piston rod of the fixed-feed cylinder (55) extends and retracts up and down to release or press down the unscrew cap blank (100) adjacent to the discharge hole (511).

8. The post-forming apparatus for the screw-on cap according to claim 2, 3, or 4, characterized in that: It also includes a glue injection mechanism (7). Correspondingly, the table (15) is also provided with a glue injection hole (155) located downstream of the plurality of processing holes and corresponding to the corresponding through holes on the conveyor belt. The glue injection mechanism includes a glue injection cam (71) mounted on the main shaft (22), a vertical shaft (72) supported on the glue injection cam (71) and located below the glue injection hole (155), and a glue injection head (73). The top of the vertical shaft (72) is equipped with a glue injection tray (74) that can pass through the glue injection hole (155) and is not higher than the upper surface of the table (15) when not in operation. The glue injection head (73) is mounted on the frame (1) above the table (15). The glue injection head (73) is connected to the glue source through a glue tube and is used to inject glue into the unscrewed cap semi-finished product on the glue injection tray (74) after it is pushed out of the through hole of the conveyor belt.

9. The post-forming apparatus for unscrewing caps according to claim 8, characterized in that: The lower end of the vertical shaft (72) is supported on the glue injection cam (71) by the piston rod of a glue injection cylinder (76). The glue injection cylinder (76) is at least partially located in the sealing cavity (18). An air passage (7621) is opened on the cylinder wall of the glue injection cylinder (76) and communicates with the sealing cavity (18) and the inner cavity of the glue injection cylinder (76), so that the piston rod of the glue injection cylinder (76) always tends to be in contact with the circumferential surface of the glue injection cam (71).

10. The post-forming apparatus for the screw-on cap according to claim 9, characterized in that: The vertical shaft (72) is designed as a spline shaft that mates with the spline sleeve (721). The lower part of the vertical shaft (72) is supported on the piston rod of the glue injection cylinder (76) by a lower bearing. The spline sleeve (721) is supported on a bearing seat (77) by an upper bearing. The middle part of the vertical shaft (72) is also fitted with a transmission wheel (79) that is fixed to the spline sleeve (721). At the same time, a first motor (70) is installed on the frame (1) to drive the transmission wheel to rotate through a transmission structure.

11. The post-forming apparatus for the screw-on cap according to claim 9, characterized in that: The lower end of the piston rod of the glue injection cylinder (76) is equipped with a second fixed seat (765). A fourth rolling element (766) that fits against the circumferential surface of the glue injection cam (71) and a fifth rolling element (767) and a sixth rolling element (768) located on both sides of the glue injection cam (71) are installed on the second fixed seat (765). Glue injection raceways (711) for the fifth and sixth rolling elements to roll are respectively opened on the two end faces of the glue injection cam (71). The shape of each glue injection raceway (711) is consistent with the circumferential contour shape of the glue injection cam (71).

12. The post-forming apparatus for the screw-on cap according to any one of claims 1 to 4, characterized in that: The feeding mechanism (6) includes a conveyor belt (63) that is wound around the drive wheel (61) and the driven wheel (62) and is driven by a second motor to rotate in a meandering manner. A magnetic plate (64) is arranged below the bearing surface of the conveyor belt (63) adjacent to the conveyor belt. The magnetic plate (64) can attract the finished screw-on cap products processed on the conveyor belt (42) to the conveyor belt (63).

13. The post-forming apparatus for the screw-on cap according to any one of claims 2 to 4, characterized in that: The push rod seat (26) includes a main tray (261), a hollow lower mold (262), and a push rod (263). The lower mold (262) is fixed to the piston rod (272) of the main cylinder (27). A positioning strip (266) is also fixed to the top of the cylinder body (271) of the main cylinder. A clearance groove (2721) is opened on the piston rod (272) of the main cylinder for the positioning strip (266) to pass through radially and move up and down relative to each other. The push rod (263) is inserted vertically into the lower mold (262), and the upper end of the push rod (263) is fixed to the main tray. The push rod (263) is also fitted with a compression spring (267) that acts on the push rod. The compression spring (267) makes the push rod (263) always tend to move downward and abut against the positioning bar (266). When the highest point of the main cam (25) is gradually in a low position, the top surface of the main tray (261) on the push rod (263) is flush with the top of the lower mold (262); when the highest point of the main cam (25) is gradually in a high position, the top surface of the main tray (261) is lower than the top of the lower mold (262).

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