Central expansion plastic cup injection blow molding production line

Abstract

The present invention discloses an integrated injection-blowing production line for plastic cups with a central outward expansion, comprising an integrated injection-blowing machine, a material-grabbing robot installed on the top of the integrated injection-blowing machine, a conveyor belt fixedly installed on the top of the integrated injection-blowing machine and close to the front side, a visual inspection device fixedly installed in the conveyor belt, a grabbing and stacking device at the top of the integrated injection-blowing machine, close to the end of the conveyor belt and capable of translating along its conveying direction, and a turnover vehicle arranged below the end of the conveyor belt; when the production line is running, the material-grabbing robot places the formed double-row plastic cups on the conveyor belt, and the conveyor belt transports them to the visual inspection device for inspection, and then they enter the grabbing range of the grabbing and stacking device, and after grabbing, the grabbing and stacking device adjusts the plastic cups from double rows to single rows and from a vertical state to a stacked flat state, and then puts them in the turnover vehicle, or puts a packaging box in the turnover vehicle to directly complete the packaging.

Description

Technical Field

[0001] The invention belongs to the technical field of plastic cup production, and in particular relates to an integrated injection-blowing production line for centrally expanded plastic cups. Background Art

[0002] Figure 1 The diagram shows a state of a plastic cup 001 (non-disposable plastic cup) with a shape being transferred to a conveyor belt for circulation after injection blow molding. The injection blow molded plastic cup 001 is generally arranged in two rows in one mold. This type of plastic cup 001 is usually used as a wine glass. The cross-section of the mouth and bottom of the cup is circular, the diameter of the mouth is larger than the bottom, and the middle part is an outward-expanding polygon. In the production line, the plastic cups of this shape have a small number of overlapping parts, and cannot be stable when stacked on each other. Therefore, in the production line, they are scattered in a transfer box and then transferred to the packaging station for manual packing, and the production efficiency is low.

[0003] Existing automated production lines for plastic cups are mostly for disposable plastic cups. For example, the Chinese invention patent authorization announcement number CN111332553B discloses an integrated equipment for preparing, counting and packaging plastic cups. The disposable plastic cups packaged by this equipment are sealed and packed without boxing. However, glass cups, ceramic cups and non-disposable plastic cups are usually stacked and laid flat for boxing. Therefore, this equipment is not suitable for Figure 1 Plastic cup 001. Summary of the invention

[0004] In view of the defects of the above-mentioned prior art, the technical problem to be solved by the present invention is to provide an integrated injection-blowing production line for center-expanded plastic cups, which can quickly stack and unload the shaped plastic cups.

[0005] The inventive object of the present invention is achieved through the following technical solutions: A center-expanding plastic cup injection-blowing production line, comprising an injection-blowing machine, a material-grabbing robot installed on the top of the injection-blowing machine, a conveyor belt fixedly installed on the top of the injection-blowing machine and close to the front side, a visual inspection device fixedly installed in the conveyor belt, a grabbing and stacking device at the top of the injection-blowing machine, close to the end of the conveyor belt and slidable along its conveying direction, and a turnover vehicle arranged below the end of the conveyor belt; when the production line is running, the material-grabbing robot places the formed double-row plastic cups on the conveyor belt, and the conveyor belt transports them to the visual inspection device for inspection, and then they enter the grabbing range of the grabbing and stacking device, and after grabbing, the grabbing and stacking device adjusts the plastic cups from double rows to single rows and from a vertical state to a stacked flat state, and then puts them into the turnover vehicle, or puts a packaging box into the turnover vehicle to directly complete the packaging.

[0006] Preferably, the main body of the grabbing and stacking device is two long strip-shaped boxes, and a clamping mechanism is provided inside the boxes, which is set so that the two boxes can be switched from being side by side to being aligned in a straight line.

[0007] Preferably, the grabbing and stacking device includes a robotic arm that can translate along the flow path of the conveyor belt, a switching component fixedly connected to the end of the robotic arm, a fixed sleeve box and a movable sleeve box located below the switching component, and clamping mechanisms respectively installed in the fixed sleeve box and the movable sleeve box.

[0008] Preferably, the switching assembly includes a guide groove with multiple bends and turns opened on the top of the movable sleeve, a guide member with one end fixed to the top of the fixed sleeve and the other end clamped in the guide groove through a roller, a fixed roller fixed to the top of the movable sleeve, divided into upper and lower sections and having a baffle plate at the intersection of the two sections, and a driving member with a long groove and the long groove tightly rolling with the lower section of the fixed roller; one end of the driving member is a free end and the other end is rotatably fixed to the top of the fixed sleeve by an axis, the switching assembly also includes a driving cylinder fixed to the upper part of the rotatable end of the driving member, and a driving motor connected to the lower part of the rotatable end of the driving member through a belt transmission; the telescopic end of the driving cylinder is fixedly connected to the upper section of the fixed roller, and the driving motor is fixedly installed on the long side of the fixed sleeve.

[0009] Preferably, the joint parts of the movable sleeve box and the fixed sleeve box are set to have the same curvature, one of which is an inner concave curved surface and the other is an outer convex curved surface.

[0010] Preferably, the fixed sleeve box and the movable sleeve box have an array of long grooves over the entire length on the same side after being connected into a straight line, and the long grooves are arranged downward.

[0011] Preferably, the clamping mechanism includes two sets of slide plates that slideably cooperate with the long grooves in the fixed sleeve and the movable sleeve respectively; the slide plates include multiple slide bars with the same spacing and width as the spacing and width of the long grooves, and are fixedly connected to all the slide bars on one side of the slide bar to form an integral connecting gear.

[0012] Preferably, the clamping mechanism also includes a stacked driving cylinder whose main body is respectively fixed on the inner wall of the fixed sleeve box and the movable sleeve box and whose telescopic end is fixed on the connecting gear; a scissor-type telescopic frame is arranged below the two sets of slide groove plates, one side of the long side is slidably installed in the connecting gear and the other side is slidably connected by a groove plate fixed on the inner wall of the lower edge of the sleeve box; the two sides and the center of the scissor-type telescopic frame are hinged, and pneumatic retractable flexible pressure blocks are fixed and rotatable at intervals at multiple hinges in the center.

[0013] Preferably, the position of the retractable flexible pressure block can drive the scissor-type telescopic frame to retract in the length direction and relatively small displacement in the up and down directions as the stacked driving cylinder is pushed. Correspondingly, a clamping component corresponding to the retractable flexible pressure block is arranged on the inner wall of the other side of the fixed sleeve and the movable sleeve, and the clamping component includes a concave guide groove, a transverse slide that slides with the guide groove, and a fixed pressure block that can slide up and down and has a certain resistance and can rotate self-centeringly. The two sides of the transverse slide are fixedly arranged in the guide groove by sliding rods and springs sleeved outside the sliding rods so that they are normally located in the middle and can be displaced away from the force-bearing side under external force. The fixed pressure block is also arranged in the transverse slide by sliding rods and springs sleeved outside the sliding rods so that it is normally located in the middle and can be displaced away from the force-bearing side under external force.

[0014] Preferably, the upper top wall of the fixed sleeve and the movable sleeve are both provided with an air flow tube, and the positions of the air flow tube corresponding to the plastic cups are provided with a plurality of air nozzles inclined in the same direction.

[0015] In summary, the present invention has the following advantages compared with the prior art:

[0016] The optimized production line of the present invention is provided with a grabbing and stacking device at the top of the injection-blowing machine and near the end of the conveyor belt, and a turnover vehicle is provided below the end of the conveyor belt, so that the plastic cups are adjusted from double rows to single rows and from a vertical state to a stacked flat state, and then placed in the turnover vehicle, or a packaging box can be placed in the turnover vehicle to directly complete the packaging. The present invention reduces product turnover and personnel input, and the grabbing and stacking device simulates human operation and is completed in two independent nestings, and the cups are turned to the nesting and completed synchronously, and can be completed during the transfer process when combined, so the stagnation time in the whole process is very short, which greatly improves the production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the present invention;

[0018] Figure 2 It is a structural schematic diagram of the combination of the reclaiming manipulator and the conveyor belt;

[0019] Figure 3 It is a structural schematic diagram of the combination of the grabbing and stacking device and the conveyor belt;

[0020] Figure 4 It is a schematic diagram of the structure after the switching component, the fixed box and the movable box are combined;

[0021] Figure 5 yes Figure 2 A partial enlarged view of the middle A;

[0022] Figure 6It is a structural schematic diagram from another angle after the switching component, the fixed box and the movable box are combined;

[0023] Figure 7 It is a schematic diagram of the structure after the fixed set box and the movable set box are switched into a straight line shape;

[0024] Figure 8 It is a structural schematic diagram of another angle after the fixed sleeve and the movable sleeve are switched into a straight line;

[0025] Fig. 9 It is a structural diagram when the fixed set box and the movable set box are switched into a straight line, the fixed set box and the movable set box are hidden, and the internal plastic cups are combined into a group;

[0026] Fig.10 It is a structural diagram of the switching process between the fixed set box and the movable set box;

[0027] Fig.11 It is a structural schematic diagram of the fixed set box and the movable set box during the switching process from another angle.

[0028] Markings in the figure:

[0029] Injection-blowing machine 10, material picking robot 20, conveyor belt 30, visual inspection equipment 40, grabbing and stacking device 50, robot arm 51, switching assembly 52, guide groove 521, guide member 522, fixed roller 523, driving member 524, driving cylinder 525, driving motor 526, fixed sleeve 53, movable sleeve 54, clamping mechanism 55, long groove 01, slide plate 551, slide 55a, stacking driving cylinder 552, scissor-type telescopic frame 553, turnover vehicle 60, telescopic flexible pressure block 03, transverse slide 05, fixed pressure block 06, air flow pipe 07, air nozzle 08. DETAILED DESCRIPTION

[0030] The present invention will be further described below with reference to the embodiments shown in the accompanying drawings:

[0031] Example 1

[0032] The present invention provides a central expansion plastic cup injection and blowing integrated production line, referring to Figure 1-2, including an injection-blowing machine 10, a material-grabbing manipulator 20 installed on the top of the injection-blowing machine 10, a conveyor belt 30 fixedly installed on the top of the injection-blowing machine 10 and close to the front side, a visual inspection device 40 fixedly installed in the conveyor belt 30, a grabbing and stacking device 50 at the top of the injection-blowing machine 10, close to the end of the conveyor belt 30 and capable of translating along its conveying direction, and a turnover vehicle 60 arranged below the end of the conveyor belt 30; when the production line is running, the material-grabbing manipulator 20 places the formed double-row plastic cups on the conveyor belt 30, and the conveyor belt 30 transports them to the visual inspection device 40 for inspection, and then enters the grabbing range of the grabbing and stacking device 50, and after grabbing, the grabbing and stacking device 50 adjusts the plastic cups from double rows to single rows and from a vertical state to a stacked flat state, and then puts them into the turnover vehicle 60, or puts a packaging box into the turnover vehicle 60 to directly complete the packaging.

[0033] The main body of the grabbing and stacking device 50 is two long sleeves, and a clamping mechanism is provided inside the sleeves. The two sleeves are set so that they can switch from parallel to straight alignment. Initially, the two sleeves are in parallel to clamp the double-row plastic cups on the conveyor belt 30. After being lifted to a certain height, the airflow sprayed by the air nozzle causes the clamped plastic cups in each sleeve to flip in the same direction in its sleeve. Here, since the positions of the molds of the plastic cups are often close, when the airflow is sprayed, the distance between the plastic cups needs to be expanded in advance or synchronously, and then the gap needs to be retracted to be stacked and merged. Finally, the two sleeves are switched from parallel to straight alignment, and the two groups of stacked and merged plastic cups are stacked into one group, which is then transferred to the turnover vehicle 60 for unloading.

[0034] Referring to the figure, the specific structure of the grabbing and stacking device 50 includes a mechanical arm 51 that can be translated along the flow path of the conveyor belt 30, a switching assembly 52 fixedly connected to the end of the mechanical arm 51, a fixed sleeve 53 and a movable sleeve 54 located below the switching assembly 52, and a clamping mechanism 55 installed in the fixed sleeve 53 and the movable sleeve 54 respectively;

[0035] The switching assembly 52 is used to transfer the movable sleeve 54 from the side of the long side of the fixed sleeve 53 to the side of the short side of the fixed sleeve 53, including a guide groove 521 with multiple bends and circuits opened on the top of the movable sleeve 54, a guide member 522 with one end fixed to the top of the fixed sleeve 53 and the other end of which is inserted into the guide groove 521 through a roller, a fixed roller 523 fixed to the top of the movable sleeve 54, divided into upper and lower sections and having a baffle at the intersection of the two sections, and a long groove provided, and the long groove and the fixed roller 523 are connected. The lower section of the driving member 524 is tightly rolling with the fixed roller 523; one end of the driving member 524 is free and the other end is rotatably fixed to the top of the fixed sleeve 53 through a shaft. The switching assembly 52 also includes a driving cylinder 525 fixed to the upper part of the rotatable end of the driving member 524, and a driving motor 526 connected to the lower part of the rotatable end of the driving member 524 through a belt transmission; the telescopic end of the driving cylinder 525 is fixedly connected to the upper section of the fixed roller 523, and the driving motor 526 is fixedly installed on the long side of the fixed sleeve 53;

[0036] The action principle of the switching component 52 is as follows: Figure 3 As shown, at this time, the grabbing and stacking device 50 is sleeved on the plastic cup, which can be defined as the initial position. In this position, the driving motor 526 needs to be started to rotate the driving member 524. Figure 3 The orientation shown is upward rotation). Figure 4 As shown, the rotating driving member 524 pushes the fixed roller 523 to change its position with the fixed roller 523, and at the same time, the guide member 522 and the guide groove 521 also move synchronously, guiding the movable box 54 to move horizontally as a whole. Figure 4 , 10 As shown, the angle at this time can be switched to the driving cylinder 525, or the driving cylinder 525 and the driving motor 526 can be driven simultaneously. When entering the bending and circuitous part of the guide groove 521, the driving cylinder 525 and the driving motor 526 can be switched at any time, so that the position conversion of the movable box 54 can be successfully completed;

[0037] like Figure 6 As shown, in order to make the movable sleeve 54 and the fixed sleeve 53 more stable and reliable when joined, the two sets of joint parts are set to have an inner concave arc surface and an outer convex arc surface with the same curvature;

[0038] The fixed sleeve 53 and the movable sleeve 54 have an array of long grooves 01 in the entire length range on the same side after being connected into a straight line, and the long grooves are arranged downward;

[0039] The clamping mechanism 55 includes two groups of slide slot plates 551 that are respectively slidably matched with the long slots 01 in the fixed sleeve 53 and the movable sleeve 54; the slide slot plate 551 includes a plurality of slide bars 55a whose intervals and widths are the same as those of the long slots 01, and one side of the slide bar 55a is fixedly connected to all the slide bars 55a to form an integral connection gear. The matching mode of the long slots 01 and the slide slot plate 551 can fine-tune the combined spacing between the two groups of plastic cups, that is, the long slots 01 and the slide slot plate 551 can choose different slots to match, which is convenient for adjustment, and the stability will not decrease after adjustment;

[0040] The clamping mechanism 55 also includes a stacked driving cylinder 552 whose main body is respectively fixed on the inner side wall of the fixed sleeve box 53 and the movable sleeve box 54 and whose telescopic end is fixed on the connecting block, and a scissor-type telescopic frame 553 which is arranged below the two sets of slide slot plates 551, one side of the long side is slidably installed in the connecting block and the other side is slidably connected by a slot plate fixed on the inner wall of the lower edge of the sleeve box; Figure 6 As shown, the scissor-type telescopic frame 553 is a connecting rod structure, in which both sides and the center are hinged, and a retractable flexible pressure block 03 is fixedly and rotatably arranged at multiple hinges in the center. The position of the retractable flexible pressure block 03 can be driven by the stacking drive cylinder 552 to drive the scissor-type telescopic frame 553 to extend and retract in the length direction and to move in a relatively small range in the up and down directions. Correspondingly, a clamping component corresponding to the retractable flexible pressure block 03 is arranged on the inner side wall of the other side of the fixed sleeve box 53 and the movable sleeve box 54. For details, refer to Fig.11 As shown, the clamping component includes a concave guide groove, a transverse slide 05 that slides with the guide groove, and a fixed pressure block 06 that can slide up and down and has a certain resistance and self-centering rotation. The two sides of the transverse slide 05 are fixedly provided with a slide rod and a spring sleeved outside the slide rod in the guide groove so that it is normally located in the middle and can be displaced away from the force-bearing side under external force. The fixed pressure block 06 is also provided with a slide rod and a spring sleeved outside the slide rod in the transverse slide 05 so that it is normally located in the middle and can be displaced away from the force-bearing side under external force. It should be noted that one side of the short sides of the two scissor-type telescopic frames 553 in the fixed sleeve 53 and the movable sleeve 54 is fixed, and the other side is a free end. The specific position of the fixed side is to meet the appropriate distance for the two groups of plastic cups to be combined into one group.

[0041] As mentioned above, after the plastic cup is clamped, it is necessary to give a jet of air to turn the plastic cup from a vertical state to a horizontal state when it is lifted to a certain height. For this purpose, an air flow tube 07 is provided on the upper top wall of the fixed sleeve 53 and the movable sleeve 54. A plurality of air nozzles 08 inclined in the same direction are provided on the air flow tube 07 at positions corresponding to the plastic cups.

[0042] Referring to all the accompanying drawings, when the production line is running, it is generally not easy to produce defective products after the injection blow molding parameters are adjusted. If defective products appear, they are often all incomplete and need to be stopped for adjustment. Therefore, the plastic cups on the conveyor belt 30 are circulated in an orderly manner in the shape when they were initially placed. Therefore, the fixed sleeve 53 and the movable sleeve 54 are arranged side by side and set to fit two rows of plastic cups from top to bottom with just the right gap. Then the retractable flexible pressing block 03 is extended to press the plastic cups against the fixed pressing block 06, and the robot arm 51 is slightly lifted so that the plastic cups have an escape space to flip away from the conveyor belt 30. The air nozzle 08 sprays air flow towards the plastic cups, and at the same time or in advance The stacking drive cylinder 552 pushes downward, causing the scissor-type telescopic frame 553 to also move downward and expand the gap. Since the aforementioned fixed pressure block 06 and the transverse slide 05 have been designed accordingly, the plastic cup can rotate accordingly, from vertical to horizontal. Due to the structure of the plastic cup, the mouth is larger than the bottom, so the horizontal state can allow some errors, which can be corrected by itself when stacking. After completion, when the robot arm 51 is transferred, the two boxes can be turned from side by side to a straight line, so that the movement does not need to stop. As mentioned above, with corresponding settings during engagement, the two groups of plastic cups can be quickly merged into one group, so that they can be circulated or directly packed into boxes.

[0043] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A central-outward-expanding plastic cup injection-blowing integrated production line, comprising an injection-blowing integrated machine (10), a material-retrieving robot (20) mounted on the top of the injection-blowing integrated machine (10), a conveyor belt (30) fixedly mounted on the top of the injection-blowing integrated machine (10) and close to the front side, and a visual inspection device (40) fixedly mounted in the conveyor belt (30), characterized in that: A grabbing and stacking device (50) is disposed at the top of the injection-blowing machine (10), near the end of the conveyor belt (30) and moves in a horizontal direction thereof, and a turnover vehicle (60) is disposed below the end of the conveyor belt (30); when the production line is in operation, the material-grabbing manipulator (20) places the formed double-row plastic cups on the conveyor belt (30), and the conveyor belt (30) transports them to the visual inspection device (40) for inspection, and then they enter the grabbing range of the grabbing and stacking device (50). After grabbing, the grabbing and stacking device (50) adjusts the plastic cups from double rows to single rows and from a vertical state to a stacked flat state, and then places them in the turnover vehicle (60), or places a packaging box in the turnover vehicle (60) to directly complete the packaging; The main body of the grabbing and stacking device (50) is two long strip-shaped sleeves, and a clamping mechanism is provided inside the sleeves, which is set so that the two sleeves can be switched from being arranged side by side to being aligned in a straight line; The grabbing and stacking device (50) comprises a mechanical arm (51) which can be translated along the flow path of the conveyor belt (30), a switching assembly (52) fixedly connected to the end of the mechanical arm (51), a fixed sleeve (53) and a movable sleeve (54) located below the switching assembly (52), and a clamping mechanism (55) respectively installed in the fixed sleeve (53) and the movable sleeve (54); The switching assembly (52) comprises a guide groove (521) with multiple bends and turns opened on the top of the movable sleeve (54), a guide member (522) with one end fixed to the top of the fixed sleeve (53) and the other end inserted into the guide groove (521) via a roller, a fixed roller (523) fixed to the top of the movable sleeve (54) and divided into upper and lower sections with a baffle plate at the intersection of the two sections, and a driving member (524) provided with a long groove and tightly rollingly matched with the lower section of the fixed roller (523); a driving member (524); One end of the member (524) is a free end and the other end is rotatably fixed to the top of the fixed sleeve (53) through a shaft. The switching assembly (52) further includes a driving cylinder (525) fixed to the upper part of the rotatable end of the driving member (524), and a driving motor (526) connected to the lower part of the rotatable end of the driving member (524) through a belt transmission. The telescopic end of the driving cylinder (525) is fixedly connected to the upper section of the fixed roller (523), and the driving motor (526) is fixedly installed on the long side of the fixed sleeve (53); The fixed sleeve (53) and the movable sleeve (54) have an array of long grooves (01) over the entire length of the same side surface after being joined into a straight line, and the long grooves are arranged at a lower position; The clamping mechanism (55) comprises two sets of slide slot plates (551) which are respectively slidably matched with the long slots (01) in the fixed sleeve (53) and the movable sleeve (54); the slide slot plates (551) comprise a plurality of slide bars (55a) whose intervals and widths are the same as the intervals and widths of the long slots (01); one side of the slide bars (55a) is fixedly connected to all the slide bars (55a) to form an integral connection gear; the clamping mechanism (55) also comprises a main body which is respectively fixed to the fixed sleeve (53); 3) A stacked driving cylinder (552) on the inner side wall of the movable sleeve (54) and with its telescopic end fixed on the connecting step, is arranged below the two sets of slide slot plates (551), one side of the long side is slidably installed in the connecting step and the other side is slidably connected by a slot plate fixedly arranged on the inner wall of the lower edge of the sleeve; the scissor-type telescopic frame (553) is hinged on both sides and the center, and pneumatic telescopic flexible pressing blocks (03) are fixedly and rotatably arranged at intervals at multiple hinges in the center; The position of the retractable flexible pressure block (03) drives the scissor-type telescopic frame (553) to retract in the length direction and to move in a relatively small range in the up-down direction as the stacked driving cylinder (552) pushes. Correspondingly, a clamping component corresponding to the retractable flexible pressure block (03) is provided on the inner wall of the other side of the fixed sleeve (53) and the movable sleeve (54), and the clamping component includes a concave guide groove, a transverse sliding seat (05) slidingly matched with the guide groove, and a fixed pressure block (06) which can slide up and down and has a certain resistance and can rotate self-centeringly. The two sides of the transverse sliding seat (05) are fixedly provided with sliding rods and springs sleeved outside the sliding rods in the guide grooves so that the two sides are normally located in the middle and can be displaced away from the force-bearing side under external force. The fixed pressure block (06) is also provided with sliding rods and springs sleeved outside the sliding rods in the transverse sliding seat (05) so that the two sides are normally located in the middle and can be displaced away from the force-bearing side under external force. The upper top walls of the fixed sleeve (53) and the movable sleeve (54) are each provided with an air flow tube (07), and the positions of the air flow tube (07) corresponding to the plastic cups are provided with a plurality of air nozzles (08) inclined in the same direction.

2. The production line according to claim 1, characterized in that: The joint parts of the movable sleeve box (54) and the fixed sleeve box (53) when they are joined are set to have the same arc, one of which is an inner concave arc surface and the other is an outer convex arc surface.

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