Vacuum chamber device for forming easy-open cover

Abstract

The utility model discloses a vacuum chamber device for easy-open cover forming, and aims to provide a vacuum chamber device which can effectively improve the problem that in the easy-open cover forming process, due to the fact that conveying belts at the two ends of a vacuum chamber in the conveying direction of the conveying belts are inclined, the positions of covers on the conveying belts are inclined. The vacuum chamber device for forming the easy-to-open cover solves the problem that the easy-to-open cover is deformed abnormally in the compression molding forming process of the easy-to-open cover. The upper end of the vacuum cavity is open; the conveyor belt is positioned below the upper die, passes through and shields the upper end opening of the vacuum cavity, and is provided with a plurality of cover mounting holes; the two presser foot assemblies comprise limiting presser feet fixed to the upper die, and the limiting presser feet are located above the conveying belt and the vacuum cavity; the two presser foot assemblies are distributed in the conveying direction of the conveying belt, one presser foot assembly is close to one end of the vacuum cavity, and the other presser foot assembly is close to the other end of the vacuum cavity.

Description

Technical Field

[0001] This utility model relates to the field of easy-open lid manufacturing technology, specifically to a vacuum chamber device for easy-open lid molding. Background Technology

[0002] The vacuum chamber device for easy-open lid forming is installed inside the mold frame. Its function is to create a vacuum negative pressure to firmly adhere the lid to the conveyor belt (the conveyor belt has several lid mounting holes, and the lid is supported in the lid mounting holes), so that the lid is smoothly conveyed horizontally with the conveyor belt. At the same time, during the descent of the upper mold of the mold forming machine, it ensures that the lid moves vertically with the conveyor belt when the conveyor belt stops, thereby satisfying the forming action of the mold at the station.

[0003] The vacuum chamber device for easy-open lid molding includes a lower template, a vacuum chamber, a conveyor belt, a bracket, a tray, a pressure rod, and a lid. A fan creates a continuous negative pressure within the vacuum chamber, adsorbing the lid onto the conveyor belt. This allows the lid to move horizontally and vertically with the conveyor belt. The tray supports the conveyor belt, while the bracket supports the tray. An elastic element under the bracket supports the tray, ensuring the conveyor belt horizontally transports the lid under vacuum. Simultaneously, the bracket, in conjunction with the pressure rod, completes the vertical movement of the conveyor belt when it stops, thus fulfilling the molding action of the mold.

[0004] Current vacuum chamber devices for easy-open lid molding are prone to the following shortcomings during the easy-open lid molding process: First, the conveyor belt in the middle of the vacuum chamber moves downwards close to the pallet, while the conveyor belts at both ends of the vacuum chamber in the conveying direction are restricted and cannot move downwards close to the pallet. This causes the conveyor belts at both ends of the vacuum chamber (in the conveying direction) to tilt, resulting in abnormal deformation of the lids on the conveyor belts at both ends due to the combined action of the mold and the conveyor belt. Second, when the pallet moves upwards, inertia causes abnormal height of the conveyor belt's conveying plane, resulting in unstable conveyor belt transport, affecting the conveyor belt's lifespan and the quality of the lid molding. Utility Model Content

[0005] The purpose of this invention is to provide a vacuum chamber device for easy-open lid molding, which can effectively improve the problem that the lid position on the conveyor belt is tilted due to the tilt of the conveyor belt at both ends of the vacuum chamber in the conveying direction during the easy-open lid molding process, resulting in abnormal deformation during the easy-open lid molding process.

[0006] The technical solution of this utility model is:

[0007] A vacuum chamber device for easy-open lid molding, comprising:

[0008] A vacuum chamber with an opening at the top;

[0009] The conveyor belt located below the upper mold passes through and blocks the upper opening of the vacuum chamber. The conveyor belt is provided with several cover mounting holes.

[0010] Two presser foot assemblies, each presser foot assembly including a limiting presser foot fixed on the upper mold, the limiting presser foot being located above the conveyor belt and the vacuum chamber;

[0011] Two presser foot assemblies are distributed along the conveyor belt's transport direction, with one presser foot assembly near one end of the vacuum chamber and the other near the other end. Thus, during the molding process of the easy-open cap mounted on the cap mounting hole by the upper mold descending (while the conveyor belt stops moving), the two presser foot assemblies descend synchronously with the upper mold. The limiting presser feet of the two assemblies restrict the height position of the conveyor belt at both ends of the vacuum chamber, thereby keeping the conveyor belt at both ends of the vacuum chamber close to the support plate and moving downwards. This effectively reduces the tilting state of the conveyor belt at both ends of the vacuum chamber, thus effectively improving the problem of abnormal deformation during the easy-open cap molding process caused by the tilting of the conveyor belt at both ends of the vacuum chamber in the transport direction, which leads to the cap's tilting position on the conveyor belt.

[0012] As a preferred option, it also includes:

[0013] A bracket and a first elastic element supporting the bracket that can be raised and lowered within the vacuum chamber;

[0014] A floating pallet is supported on a bracket, and a conveyor belt is supported on the floating pallet. The floating pallet is provided with several through holes.

[0015] The bracket pressure bar assembly includes a bracket pressure bar fixed to the upper mold;

[0016] During the downward movement of the upper mold, the bracket pressure rod will press against the bracket and drive the bracket downward;

[0017] During the downward movement of the upper mold, as soon as the bracket pressure rod contacts the bracket, the limiting pressure foot approaches the conveyor belt. Thus, during the molding process of the easy-open cap mounted on the cap mounting hole by the downward movement of the upper mold, the limiting pressure feet of the two pressure foot assemblies can limit the height position of the conveyor belt at both ends of the vacuum chamber. This keeps the conveyor belt at both ends of the vacuum chamber close to the tray as it moves downward, effectively reducing the tilting state of the conveyor belt at both ends of the vacuum chamber. This effectively improves the problem of abnormal deformation during the easy-open cap molding process caused by the tilting of the conveyor belt at both ends of the vacuum chamber in the conveyor belt direction.

[0018] Preferably, it also includes a movable pressure bar assembly, which includes

[0019] The movable pressure bar is mounted on the upper mold in a height-adjustable manner;

[0020] The second elastic element provides a downward elastic preload acting on the movable pressure bar;

[0021] During the downward movement of the upper mold, the lower end of the movable pressure rod will abut against the floating support plate. The movable pressure rod assembly can effectively improve the problem of abnormal height of the conveyor belt due to inertia when the floating support plate moves upward, causing unstable conveyor belt conveying, which affects the life of the conveyor belt and the quality of the cap forming, without affecting the downward movement of the upper mold to form the easy-open cap.

[0022] Preferably, there are two movable pressure bar assemblies, which are distributed along the conveying direction of the conveyor belt.

[0023] Preferably, the vacuum chamber has a first groove on each of its two inner sidewalls. A movable pressure rod through-hole is provided on the top surface of the sidewall corresponding to the first groove. The movable pressure rod through-hole is connected to the corresponding first groove, and is positioned directly above and can pass through the through-hole. The floating support plate has ear plates on both sides corresponding to the first groove, extending into the corresponding first groove and positioned below the movable pressure rod through-hole. This design ensures that the movable pressure rod smoothly presses against the floating support plate, pushing it downwards or limiting its upward inertia. It also improves the structural compactness of the vacuum chamber device for easy-open lid molding.

[0024] Preferably, the vacuum chamber has two opposing inner sidewalls with second grooves. Corresponding to the second grooves, each sidewall of the vacuum chamber has a bracket pressure rod through-hole on its top surface. The bracket pressure rod through-hole is connected to the corresponding second groove. The bracket pressure rod is located directly above the through-hole and can pass downwards through it. The bracket has extensions on both sides corresponding to the second grooves, extending into the corresponding second grooves. The extensions are located below the through-holes and abut against the inner top surface of the second groove under the action of a first elastic element. This ensures that the bracket pressure rod can smoothly press against the bracket, driving the bracket downwards; it also improves the structural compactness of the vacuum chamber device for easy-opening lid molding.

[0025] Preferably, there are two brackets, distributed along the conveyor belt's conveying direction. One bracket is closer to one end of the vacuum chamber, and the other is closer to the other end. The bracket pressure rod assembly corresponds to each bracket, and is located above the corresponding bracket. This ensures that the bracket can stably support the floating tray.

[0026] Preferably, the mold also includes a lower mold template. The top surface of the lower mold template is provided with two end face baffles and two side baffles located between the two end face baffles. The two end face baffles are distributed along the conveying direction of the conveyor belt. The space enclosed by the two end face baffles and the two side baffles constitutes the vacuum cavity. The top surfaces of the two end face baffles are at the same height, and the conveyor belt is located above the two end face baffles.

[0027] Preferably, the floating support plate is located above the end face baffle; the limiting pressure foot is also located above the end face baffle. In this way, the bottom dead center position of the floating support plate can be limited by the end face baffle.

[0028] Preferably, the same presser foot assembly has at least two limiting presser feet, and these limiting presser feet are distributed along a direction perpendicular to the conveyor belt's conveying direction. In this way, during the compression molding of the easy-open cap mounted on the cap mounting hole by the upper mold descending, the limiting presser feet of the same presser foot assembly can more effectively limit the height position of the conveyor belt at both ends of the vacuum chamber. This ensures that the conveyor belt at both ends of the vacuum chamber moves downwards close to the pallet, further reducing the tilt of the conveyor belt at both ends of the vacuum chamber. This effectively improves the problem of abnormal deformation during the easy-open cap molding process caused by the tilt of the conveyor belt at both ends of the vacuum chamber in the conveying direction, which leads to the cap's tilted position on the conveyor belt.

[0029] The beneficial effects of this utility model are:

[0030] Firstly, it can effectively improve the problem that during the easy-open lid molding process, the lid position on the conveyor belt is tilted due to the tilt of the conveyor belt at both ends of the vacuum chamber in the conveying direction, resulting in abnormal deformation during the easy-open lid molding process.

[0031] Secondly, without affecting the downward movement of the upper mold to perform molding of the easy-open lid, it can effectively improve the problem of abnormal height of the conveyor belt due to inertia when the floating pallet moves upward, which causes unstable conveyor belt conveying and affects the life of the conveyor belt and the quality of lid forming, during the upward movement of the upper mold after molding. Attached Figure Description

[0032] Figure 1 This is a three-dimensional structural schematic diagram of a vacuum chamber device for easy-opening lid molding according to this utility model.

[0033] Figure 2 This is a cross-sectional structural schematic diagram of a vacuum chamber device for easy-opening lid molding according to this utility model.

[0034] Figure 3 yes Figure 2 A schematic diagram of a cross-sectional structure at point AA.

[0035] In the picture:

[0036] Conveyor belt 1, cover mounting hole 1.1;

[0037] Presser foot assembly 2, limit presser foot 2.1;

[0038] Bracket pressure bar assembly 3, bracket pressure bar 3.1

[0039] Movable pressure bar assembly 4, movable pressure bar 4.1, second elastic element 4.2;

[0040] Easy-open lid 5;

[0041] Vacuum cavity 6;

[0042] Lower template 7;

[0043] End face baffle 8;

[0044] Side baffle 9, first groove 9.1;

[0045] Transition baffle 10;

[0046] Floating support plate 11, cover hole 11.0, ear plate 11.1;

[0047] Bracket 12;

[0048] First elastic element 13. Detailed Implementation

[0049] Specific Implementation Example 1, such as Figure 1 , Figure 2 As shown, a vacuum chamber device for easy-open lid molding includes a conveyor belt 1, a vacuum chamber 6, and two pressure foot assemblies 2. The upper end of the vacuum chamber 6 is open. The conveyor belt 1 is located below the upper mold. The conveyor belt 1 passes through and blocks the upper opening of the vacuum chamber 6. In this embodiment, the conveyor belt 1 is horizontally distributed. The conveyor belt 1 is provided with a plurality of lid mounting holes 1.1. The lid mounting holes are distributed sequentially along the conveying direction of the conveyor belt 1.

[0050] The presser foot assembly 2 is located above the vacuum chamber 6. The two presser foot assemblies 2 are distributed along the conveying direction of the conveyor belt 1, with one presser foot assembly 2 close to one end of the vacuum chamber 6 and the other presser foot assembly 2 close to the other end of the vacuum chamber 6.

[0051] The presser foot assembly 2 includes a limiting presser foot 2.1 fixed on the upper mold, and the limiting presser foot 2.1 is located above the conveyor belt 1 and the vacuum chamber 6.

[0052] When the vacuum chamber device for easy-open lid molding in this embodiment is working...

[0053] Easy-open covers 5 are installed in cover mounting holes on conveyor belt 1, with one easy-open cover 5 installed in each cover mounting hole. The easy-open covers are moved horizontally by conveyor belt 1. When the conveyor belt 1 moves the easy-open cover to the designated station, the conveyor belt 1 stops conveying.

[0054] Next, the upper mold moves downward to mold the easy-open cap installed on the cap mounting hole. During this process, the two pressure foot assemblies 2 move downward synchronously with the upper mold. The limiting pressure feet 2.1 of the two pressure foot assemblies 2 limit the height position of the conveyor belts 1 at both ends of the vacuum chamber, so that the conveyor belts 1 at both ends of the vacuum chamber move downward close to the pallet. This effectively reduces the tilting state of the conveyor belts 1 at both ends of the vacuum chamber, thereby effectively improving the problem that the cap position on the conveyor belt 1 is tilted due to the tilting of the conveyor belts 1 at both ends of the vacuum chamber in the conveying direction of the conveyor belt 1 during the easy-open cap molding process, which causes abnormal deformation during the easy-open cap molding process.

[0055] Specific embodiment two, such as Figure 1 , Figure 2 , Figure 3 As shown, a vacuum chamber device for easy-open lid molding includes a conveyor belt 1, a vacuum chamber 6, a floating tray 11, a bracket pressure rod assembly 3, a bracket 12, a first elastic element 13, and two pressure foot assemblies 2.

[0056] The vacuum chamber 6 has an opening at its upper end. The conveyor belt 1 is located below the upper mold. The conveyor belt 1 passes through and blocks the upper opening of the vacuum chamber 6. In this embodiment, the conveyor belt 1 is horizontally distributed. The conveyor belt 1 is provided with several cover mounting holes 1.1. The cover mounting holes are distributed sequentially along the conveying direction of the conveyor belt 1.

[0057] The bracket 12 is vertically and slidably disposed within the vacuum chamber 6. A first elastic element 13 supports the bracket 12. In this embodiment, the bracket 12 is vertically and slidably disposed within the vacuum chamber 6. The first elastic element 13 is a compression spring, located below the bracket 12. Under the action of the first elastic element 13, the bracket 12 moves upward to a designated position.

[0058] A floating pallet 11 is supported on a bracket 12. A conveyor belt 1 is supported on the floating pallet 11. The floating pallet 11 has several cover holes 11.0. These cover holes 11.0 are distributed sequentially along the conveying direction of the conveyor belt 1.

[0059] The bracket pressure bar assembly 3 includes a bracket pressure bar 3.1 fixed to the upper mold. The bracket pressure bar 3.1 is located above the bracket 12 and is used to press down on the bracket 12.

[0060] The presser foot assembly 2 is located above the vacuum chamber 6. Two presser foot assemblies 2 are distributed along the conveying direction of the conveyor belt 1, with one presser foot assembly 2 near one end of the vacuum chamber 6 and the other presser foot assembly 2 near the other end of the vacuum chamber 6. The presser foot assembly 2 includes a limiting presser foot 2.1 fixed to the upper mold, the limiting presser foot 2.1 being located above the conveyor belt 1 and the vacuum chamber 6.

[0061] During the downward movement of the upper mold, the bracket pressure rod 3.1 will press against the bracket 12 and drive the bracket 12 downward;

[0062] During the downward movement of the upper mold, when the bracket pressure rod 3.1 just contacts the bracket 12, the limit pressure foot 2.1 approaches the conveyor belt 1.

[0063] When the vacuum chamber device for easy-open lid molding in this embodiment is working...

[0064] Easy-open covers 5 are installed in cover mounting holes on conveyor belt 1, with one easy-open cover 5 installed in each cover mounting hole. The easy-open covers are moved horizontally by conveyor belt 1. When the conveyor belt 1 moves the easy-open covers to the designated work position, the conveyor belt 1 stops conveying. At this time, each easy-open cover on the conveyor belt 1 has a cover passage hole 11.0 distributed below it, and the easy-open cover can pass through the cover passage hole 11.0.

[0065] Next, the upper mold moves downward to mold the easy-open cap installed in the cap mounting hole. During this process,

[0066] The bracket pressure rod assembly 3 and the two pressure foot assemblies 2 descend synchronously with the upper mold. The bracket pressure rod 3.1 abuts against the bracket 12 and drives the bracket 12 downward, while the floating tray 11 descends synchronously. Simultaneously, when the bracket pressure rod 3.1 just contacts the bracket 12, the limiting pressure foot 2.1 approaches the conveyor belt 1. The limiting pressure foot 2.1 of the two pressure foot assemblies 2 restricts the height position of the conveyor belt 1 at both ends of the vacuum chamber. As the conveyor belt 1 descends synchronously with the floating tray 11, the conveyor belt 1 at both ends of the vacuum chamber remains close to the tray and moves downward, effectively reducing the tilt of the conveyor belt 1 at both ends of the vacuum chamber. When the easy-open cover descends with the conveyor belt 1 and contacts the lower mold, the upper mold drives the bracket 12 to continue descending until the bottom dead center position via the bracket pressure rod 3.1, completing the molding of the easy-open cover. Therefore, the vacuum chamber device for easy-open lid molding in this embodiment can effectively improve the problem that the lid position on the conveyor belt 1 is tilted due to the tilt of the conveyor belt 1 at both ends of the vacuum chamber in the conveying direction of the conveyor belt 1 during the easy-open lid molding process, resulting in abnormal deformation during the easy-open lid molding process.

[0067] Next, the upper mold drives the bracket pressure rod assembly 3 and the two pressure foot assemblies 2 to move upward and reset. The bracket 12, floating plate 11 and conveyor belt 1 move upward and reset under the action of the first elastic element 13.

[0068] Specifically, such as Figure 1 , Figure 2 , Figure 3 As shown, a vacuum chamber device for easy-open lid molding also includes a lower mold plate 7. The top surface of the lower mold plate 7 is provided with two end face baffles 8 and two side baffles 9 located between the two end face baffles 8. The two end face baffles 8 are distributed along the conveying direction of the conveyor belt 1, and the space enclosed by the two end face baffles 8 and the two side baffles 9 constitutes the vacuum chamber 6. The top surfaces of the two end face baffles 8 are at the same height. The conveyor belt 1 is located above the two end face baffles 8. A floating support plate 11 is located above the two end face baffles 8. A limiting pressure foot 2.1 is also located above the end face baffles 8. During the downward movement of the upper mold, when the easy-open lid contacts the lower mold as it moves down with the conveyor belt 1, the floating support plate 11 contacts the two end face baffles 8 at both ends of the vacuum chamber and stops moving downward. Afterward, the upper mold, driven by the support pressure rod 3.1, continues to move downward until the bottom dead center position. When the upper mold reaches the bottom dead center position, the limiting pressure foot 2.1 presses both ends of the conveyor belt 1 onto the top surfaces of the two end face baffles 8.

[0069] In this embodiment, as Figure 1 , Figure 2 As shown, a vacuum chamber device for easy-open lid molding also includes two transition baffles 10, which are distributed along the conveying direction of the conveyor belt 1. Two end face baffles 8 are located between the two transition baffles 10. Each end face baffle 8 corresponds to one of the two transition baffles 10, and the transition baffles 10 are installed on the outer side of the corresponding end face baffle 8. The top surface of the transition baffle 10 is higher than the top surface of the end face baffle 8. The conveyor belt 1 is located above the two transition baffles 10.

[0070] In this embodiment, a vacuum chamber device for easy-open lid molding also includes a vacuum connector connected to the vacuum chamber 6. In actual operation, a vacuum pump or blower is used to evacuate the vacuum chamber 6 through the vacuum connector, so that the vacuum chamber 6 forms a continuous negative pressure, and the easy-open lid installed in the lid mounting hole is adsorbed onto the conveyor belt 1, so that the lid can move horizontally and vertically with the conveyor belt 1.

[0071] Furthermore, such as Figure 1 , Figure 2As shown, there are at least two limiting pressure feet 2.1 in the same pressure foot assembly 2, and each limiting pressure foot 2.1 in the same pressure foot assembly 2 is distributed along the conveying direction perpendicular to the conveyor belt 1. In this embodiment, there are three limiting pressure feet 2.1 in the same pressure foot assembly 2. Of course, it should be noted that the limiting pressure feet 2.1 in the same pressure foot assembly 2 can also be set to two, four or more as needed. In this way, during the molding process of the easy-open cover installed on the cover mounting hole by the upper mold moving downward, the height position of the conveyor belt 1 at both ends of the vacuum chamber can be more effectively limited by each limiting pressure foot 2.1 in the same pressure foot assembly 2, so that the conveyor belt 1 at both ends of the vacuum chamber moves downward close to the pallet as a whole, further effectively reducing the tilt state of the conveyor belt 1 at both ends of the vacuum chamber, thereby effectively improving the problem of abnormal deformation caused by the tilt of the conveyor belt 1 at both ends of the vacuum chamber in the conveying direction of the conveyor belt 1 during the molding process of the easy-open cover, which leads to the tilt of the cover position on the conveyor belt 1 at that point.

[0072] Furthermore, such as Figure 2 As shown, there are two brackets 12. The two brackets 12 are distributed along the conveying direction of the conveyor belt 1, with one bracket 12 closer to one end of the vacuum chamber 6 and the other bracket 12 closer to the other end of the vacuum chamber 6. A bracket pressure rod assembly 3 corresponds to each bracket 12. The bracket pressure rod assembly 3 is located above the corresponding bracket 12. This ensures that the bracket 12 can stably support the floating tray 11.

[0073] The same bracket pressure rod assembly 3 contains at least two bracket pressure rods 3.1, with some bracket pressure rods 3.1 located on one side of the conveyor belt 1 and others located on the opposite side of the conveyor belt 1. In this embodiment, the same bracket pressure rod assembly 3 contains four bracket pressure rods 3.1, with two bracket pressure rods 3.1 located on one side of the conveyor belt 1 and the other two located on the opposite side of the conveyor belt 1. The same bracket pressure rod assembly 3 uses the four bracket pressure rods 3.1 to smoothly press down the bracket 12.

[0074] Furthermore, the vacuum chamber 6 has second grooves on its two opposing inner sidewalls, and the bracket 12 has extensions on both sides corresponding to the second grooves, which extend into the corresponding second grooves. Specifically, the inner sidewall of the vacuum chamber 6 has a second groove structure corresponding to the bracket 12, which includes second grooves on the two opposing inner sidewalls of the vacuum chamber 6. The bracket 12 has extensions on both sides corresponding to the second grooves, which extend into the corresponding second grooves. The top surface of the sidewall of the vacuum chamber 6 has through holes for bracket pressure rods 3.1 at positions corresponding to the second grooves, and these through holes are connected to the corresponding second grooves. The bracket pressure rods 3.1 are located directly above the through holes and can pass downward through them. In this embodiment, the bracket pressure rods 3.1 are vertically distributed. The extensions are located below the corresponding through holes. The extension abuts against the inner top surface of the second groove under the action of the first elastic element 13. At this time, the bracket 12 moves upward to the designated position under the action of the first elastic element 13. During the downward movement of the upper mold, the two pressure foot assemblies 2 move downward synchronously with the upper mold. The bracket pressure rod 3.1 passes through the corresponding bracket pressure rod 3.1 through hole and then presses against the extension of the bracket 12, thereby driving the bracket 12 downward. In this way, on the one hand, it can ensure that the bracket pressure rod 3.1 can smoothly press against the bracket 12 and drive the bracket 12 downward; on the other hand, it can also improve the structural compactness of the vacuum chamber device for easy-open lid molding.

[0075] In this specific embodiment, the remaining structure is the same as in the specific embodiment, except that...

[0076] like Figure 1 , Figure 2 , Figure 3 As shown, a vacuum chamber device for easy-opening lid molding also includes a movable pressure rod assembly 4. The movable pressure rod assembly 4 includes a movable pressure rod 4.1 and a second elastic element 4.2. The movable pressure rod 4.1 is vertically mounted on the upper mold. The second elastic element 4.2 provides a downward elastic preload acting on the movable pressure rod 4.1. In this embodiment, the upper mold is provided with a vertical guide hole, the movable pressure rod 4.1 is vertically distributed, and the movable pressure rod 4.1 is slidably mounted in the vertical guide hole. The movable pressure rod 4.1 is provided with a limiting block, which is located above the vertical guide hole. The second elastic element 4.2 is a spring. Under the action of the second elastic element 4.2, the movable pressure rod 4.1 slides downward along the vertical guide hole until the limiting block abuts against the upper end of the vertical guide hole.

[0077] During the downward movement of the upper mold, the lower end of the movable pressure rod 4.1 will abut against the floating support plate 11. When the floating support plate 11 contacts the two end face baffles 8 at both ends of the vacuum chamber and stops moving downward, the movable pressure rod 4.1 also stops moving downward. After that, the upper mold continues to move downward, and the movable pressure rod 4.1 slides along the vertical guide hole, which does not affect the upper mold from continuing to move downward to mold the easy-open cover.

[0078] During the upward movement of the upper mold, the upper mold first drives the bracket pressure rod assembly 3 and the two pressure foot assemblies 2 to move upward and reset. During this process, the first elastic element 13 overcomes the gravity of the bracket 12, the floating plate 11 and the conveyor belt 1, as well as the elastic force of the second elastic element 4.2, so that the bracket 12, the floating plate 11 and the conveyor belt 1 move upward and reset under the action of the first elastic element 13. When the bracket 12 moves upward to the designated position under the action of the first elastic element 13 (that is, when the extension part abuts against the inner top surface of the second groove under the action of the first elastic element 13), the bracket 12 stops moving upward. At this time, the movable pressure rod 4.1 still abuts against the floating plate 11 under the action of the second elastic element 4.2, thereby overcoming the inertia of the floating plate 11 moving upward. When the extension part abuts against the inner top surface of the second groove under the action of the first elastic element 13, the floating plate 11 also stops moving upward at the same time. Therefore, in this embodiment, the movable pressure rod assembly 4 can effectively improve the problem that when the floating pallet 11 moves upward, it is affected by inertia, causing the conveyor belt 1 to have an abnormal height, resulting in unstable conveying of the conveyor belt 1 and affecting the life of the conveyor belt 1 and the quality of the cover forming, without affecting the downward movement of the upper mold to form the easy-open cover.

[0079] In this embodiment, there are two movable pressure bar assemblies 4, which are distributed along the conveying direction of the conveyor belt 1. Each movable pressure bar assembly 4 has two movable pressure bars 4.1, and the two movable pressure bars 4.1 of the same movable pressure bar assembly 4 are distributed on opposite sides of the conveyor belt 1. Of course, it should be noted that the movable pressure bar assembly 4 can also be set to one, three or more, or more as needed; the number of movable pressure bars 4.1 in each movable pressure bar assembly 4 can also be set to three, four or more, or more as needed.

[0080] Furthermore, such as Figure 3As shown, the vacuum chamber 6 has two opposite inner sidewalls with first grooves 9.1, and the floating support plate 11 has ear plates 11.1 on both sides corresponding to the first grooves 9.1, which extend into the corresponding first grooves 9.1. Specifically, the inner sidewall of the vacuum chamber 6 has a first groove 9.1 structure corresponding to the movable pressure rod assembly 4, which includes the first grooves 9.1 on the two opposite inner sidewalls of the vacuum chamber 6. Movable pressure rod 4.1 through holes are provided on the top surface of the sidewall of the vacuum chamber 6 at positions corresponding to the first grooves 9.1. The through holes of the movable pressure rod 4.1 are connected to the corresponding first grooves 9.1. The movable pressure rod 4.1 is located directly above the corresponding through hole and can pass downward through the through hole. The ear plates 11.1 are located below the corresponding through holes of the movable pressure rod 4.1. In this way, on the one hand, it can ensure that the movable pressure rod 4.1 can smoothly press against the floating support plate 11, pushing the floating support plate 11 downward or limiting the inertial effect of the floating support plate 11 during the upward process; on the other hand, it can also improve the structural compactness of the vacuum chamber device for easy-open lid molding.

[0081] The above description is merely a preferred embodiment of the present utility model and does not constitute any limitation on the present utility model. Any simple modifications, alterations, or equivalent transformations made to the above embodiments based on the technical essence of the present utility model shall still fall within the protection scope of the present utility model.

Claims

1. A vacuum chamber device for forming easy open lid, comprising: a vacuum cavity with an open upper end; a conveyor belt located below the upper mold and passing through and shielding the open upper end of the vacuum cavity, the conveyor belt being provided with a plurality of lid mounting holes; characterized in that it further comprises: two presser foot assemblies, each comprising a limiting presser foot fixed to the upper mold and located above the conveyor belt and the vacuum cavity; the two presser foot assemblies are distributed along the conveying direction of the conveyor belt, and one of the presser foot assemblies is located near one end of the vacuum cavity, and the other presser foot assembly is located near the other end of the vacuum cavity.

2. A vacuum chamber apparatus for forming easy open cover according to claim 1, further comprising comprising: a bracket and a first elastic element supporting the bracket, the bracket being arranged in the vacuum cavity in a liftable manner; a floating support plate supported on the bracket, the conveyor belt being supported on the floating support plate, the floating support plate being provided with a plurality of lid through holes; a bracket presser rod assembly comprising a bracket presser rod fixed to the upper mold; during the downward movement of the upper mold, the bracket presser rod will abut against the bracket and drive the bracket to move downward; during the downward movement of the upper mold, when the bracket presser rod just contacts the bracket, the limiting presser foot is close to the conveyor belt.

3. A vacuum chamber apparatus for forming easy open cover according to claim 2, wherein further comprising a movable presser rod assembly, which comprises a movable presser rod arranged on the upper mold in a liftable manner; a second elastic element providing downward elastic pre-pressure on the movable presser rod; during the downward movement of the upper mold, the lower end of the movable presser rod will abut against the floating support plate.

4. A vacuum chamber apparatus for forming easy open cover according to claim 3, wherein the movable presser rod assembly is two, and the two movable presser rod assemblies are distributed along the conveying direction of the conveyor belt.

5. A vacuum chamber apparatus for forming a easy open end according to claim 3 or 4, characterized in that first grooves are arranged on the opposite inner side walls of the vacuum cavity, and movable presser rod through holes corresponding to the first grooves are arranged on the top surface of the side wall of the vacuum cavity, the movable presser rod through holes are in communication with the corresponding first grooves, the movable presser rod is located directly above the movable presser rod through hole and can pass through the movable presser rod through hole downwardly, and the floating support plate is provided with ear plates corresponding to the first grooves on the two sides thereof, the ear plates extend into the corresponding first grooves, and the ear plates are located below the movable presser rod through holes.

6. A vacuum chamber apparatus for forming an easy open lid according to claim 2 or 3 or 4, characterized in that second grooves are arranged on the opposite inner side walls of the vacuum cavity, and bracket presser rod through holes corresponding to the second grooves are arranged on the top surface of the side wall of the vacuum cavity, the bracket presser rod through holes are in communication with the corresponding second grooves, the bracket presser rod is located directly above the bracket presser rod through hole and can pass through the bracket presser rod through hole downwardly, and the bracket is provided with extension portions corresponding to the second grooves on the two sides thereof, the extension portions extend into the corresponding second grooves, and the extension portions are located below the bracket presser rod through holes, and the extension portions abut against the inner top surface of the second grooves under the action of the first elastic element.

7. A vacuum chamber apparatus for forming a easy open end according to claim 2 or 3 or 4, characterized in that the bracket is two, and the two brackets are distributed along the conveying direction of the conveyor belt, and one of the brackets is located near one end of the vacuum cavity, and the other bracket is located near the other end of the vacuum cavity, the bracket presser rod assembly corresponds to the bracket one by one, and the bracket presser rod assembly is located above the corresponding bracket.

8. A vacuum chamber apparatus for forming a easy open end according to claim 2 or 3 or 4, characterized in that further comprising a mold base lower mold plate, the top surface of the mold base lower mold plate being provided with two end face baffles and two side baffles located between the two end face baffles, the two end face baffles being distributed along the conveying direction of the conveyor belt, and the space surrounded by the two end face baffles and the two side baffles constituting the vacuum cavity, the top surfaces of the two end face baffles being located at the same height, and the conveyor belt being located above the two end face baffles.

9. A vacuum chamber apparatus for forming easy open cover according to claim 8, wherein the floating support plate is located above the end face baffles; and the limiting presser foot is also located above the end face baffles.

10. A vacuum chamber apparatus for forming a easy open end according to claim 1 or 2 or 3 or 4, characterized in that, The same foot assembly is at least two limit the foot, the same foot assembly of each limit the foot along the vertical direction of the conveyor belt distribution.

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