A preform packaging conveying system and conveying method thereof

Abstract

The present invention discloses a bottle preform packing conveying system and a conveying method thereof, wherein the conveying system comprises two conveyor belts arranged side by side and inclined relatively to each other; each conveyor belt is provided with a power device; a side-taking robot and a packing robot are respectively located at the head and tail ends of the conveyor belts, the grabbing end of the side-taking robot grabs the bottle mouth of a group of bottle preforms, and the packing robot grabs the bottle body of the bottle preforms on any one of the conveyor belts; a control system is connected with the power devices of the two conveyor belts, the side-taking robot and the packing robot, and is used to control the grabbing end of the side-taking robot to grab multiple groups of bottle preforms in sequence and release the multiple groups of bottle preforms alternately on the two conveyor belts in sequence; the power device is controlled to control the moving conveyor belt to temporarily pause according to the time interval of releasing the bottle preforms by the grabbing end; and the packing robot is controlled to grab the bottles on the two conveyor belts in batches alternately and transfer them in batches into packaging boxes, and the conveying systems are matched with each other to maximize the packing efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of fully automated packaging, and in particular to a preform packaging conveying system and a conveying method thereof. Background Art

[0002] At present, in the intelligent and fully automatic production process of bottle preforms, the bottle preforms will enter the packaging production line for the preform removal and boxing process after injection molding. In this process, the bottle preforms that have been injected and cooled need to be transferred to the packaging boxes in batches.

[0003] In the prior art, after the injection molding is completed, the preforms are generally transported to the packaging production line in a vertical state, and then transferred to the linear conveyor belt on the packaging production line for transportation. During the transportation process, the vertical preforms are grabbed by a robotic arm, and after the preforms are lifted to a certain height, they are horizontally moved to the top of the packaging box, and then the preforms are vertically moved downward until they fall into the packaging box. In this process, the movement path of the robotic arm is relatively long, so the process of grabbing and transferring by the robotic arm in a single time takes a long time, resulting in the inability to improve the packaging efficiency.

[0004] Secondly, the bottle preforms are stacked vertically in the packaging box, the contact area between the bottom of the bottle preforms and the packaging box is small and the surface is unstable, resulting in poor stability of the bottle preforms in the packaging box. The bottle preforms are easy to tilt in the packaging box, affecting the subsequent normal packing process; and the bottle preforms are generally cylindrical in structure, and the bottle preforms are placed in the packaging box at an angle perpendicular to the bottom of the packaging box, so that the area occupied by a single bottle preform in the packaging box is too large, and the number of bottle preforms in a packaging box is small, resulting in the spacing between connected bottle preforms in the packaging box cannot be used, and the space utilization rate in the packaging box is low.

[0005] In the prior art, there is also a technical solution of using a robot to rotate the vertical preforms to a horizontal state so that the preforms can be stacked horizontally in a packaging box. However, the rotation amplitude of the robot in this process is relatively large; and the robot generally grabs the bottle mouth of the preform. If the preform is rotated and placed horizontally in the packaging box in this grabbing manner, the grabbing end of the robot cannot enter the limited space of the packaging box due to its large size, so that the preforms cannot be stably stacked in the packaging box, resulting in low efficiency in the packaging process of the preforms. Summary of the invention

[0006] In order to overcome the shortcomings of the prior art, one of the objects of the present invention is to provide a preform packaging conveying system, which uses two relatively inclined conveyor belts to coordinate the working angles and grasping sequences of a side-picking robot and a packaging robot to maximize the working efficiency of the entire packaging system.

[0007] A second object of the present invention is to provide a method for conveying preforms into boxes, which is applied to the above-mentioned system for conveying preforms into boxes.

[0008] One of the purposes of the present invention is achieved by the following technical solution:

[0009] A preform packing and conveying system, comprising:

[0010] The conveyor assembly comprises two conveyor belts arranged side by side and inclined relative to each other; each conveyor belt is provided with a power device for driving the conveyor belt to move;

[0011] A grabbing assembly, comprising a side-taking robot and a boxing robot respectively located at the head and tail ends of the conveyor belt, wherein the grabbing end of the side-taking robot grabs the mouth of a group of preforms, and the boxing robot grabs the body of the preform on any one of the conveyor belts;

[0012] A control system is connected to the power equipment of the two conveyor belts, the side-taking robot and the boxing robot. The control system controls the grabbing end of the side-taking robot to grab multiple groups of bottle preforms in sequence and release the multiple groups of bottle preforms alternately on the two conveyor belts in sequence; and controls the power equipment to control the moving conveyor belt to temporarily pause according to the time interval of releasing the bottle preforms by the grabbing end; and then controls the boxing robot to alternately grab the bottle bodies of the bottle preforms on the two conveyor belts in batches, and transfer them in batches into packaging boxes.

[0013] Furthermore, the angle between the extended surfaces of the two conveyor belts is set to 60° to 160°.

[0014] Furthermore, the extended surfaces of the two conveyor belts intersect, and a vertical plane passing through the intersection line is set as plane O, and the angles between plane O and the extended surfaces of the two conveyor belts are the same.

[0015] Furthermore, the shortest distance between the highest points of the surfaces of the two conveyor belts and the O surface is greater than the shortest distance between the lowest points of the surfaces of the two conveyor belts and the O surface.

[0016] Furthermore, the bottle body of the preform is perpendicular to the gripping end, and the side-taking robot drives its gripping end to rotate until the gripping end is perpendicular to the surface of the conveyor belt, so that when the gripping end releases the preform, the bottle body of the preform is parallel to the conveyor belt surface.

[0017] Furthermore, a group of preforms grasped by the grasping end is in a matrix structure, and the grasping end releases a row of preforms in a group of preforms each time, and after each row of preforms is released, the grasping end moves downward at the same inclination angle until the next row of preforms approaches the surface of the conveyor belt, so that each row of preforms falls directly onto the surface of the conveyor belt when released.

[0018] Furthermore, the packing robot rotates to an angle perpendicular to the conveyor belt to grasp the bottle body of the preform.

[0019] The second object of the present invention is achieved by adopting the following technical solution:

[0020] A preform packaging and conveying method, applied in the preform packaging and conveying system as described above, comprises:

[0021] Step S1: controlling the gripping end of the side-taking robot to grip a group of bottle mouths of preforms and move them to the first conveyor belt, controlling the first conveyor belt to temporarily pause according to the time interval of releasing the bottle preforms, and controlling the gripping end to release a group of bottle preforms row by row on the first conveyor belt when the conveyor belt pauses;

[0022] Step S2: Control the side-picking robot to grab the mouths of another group of preforms, and release the preforms row by row onto the second conveyor belt according to the method of step S1; during this period, the first conveyor belt transports a group of preforms to one end where the box packing robot is located, and controls the box packing robot to move to a position perpendicular to the first conveyor belt, grabs the bottle bodies of the preforms on the conveyor belt in batches and transfers them to the packaging box, until a group of preforms on the first conveyor belt are completely transferred;

[0023] Step S3: Returning to step S1, when the side-picking robot grabs another group of preforms and releases them on the first conveyor belt, the second conveyor belt in step S2 transports a group of preforms to the end where the case packing robot is located, and the case packing robot is controlled to move to a position perpendicular to the second conveyor belt, grabs the bottle bodies of the preforms on the conveyor belt in batches and transfers them to the packaging box until the group of preforms on the second conveyor belt is completely transferred.

[0024] Furthermore, the method for releasing the preform by the side-taking robot in step S1 is:

[0025] Step S11: the side-taking robot controls the gripping end thereof to move and rotate to an inclined angle perpendicular to the conveyor belt, so that a row of preforms located at the lowest end of the gripping end is close to the surface of the conveyor belt;

[0026] Step S12: releasing a row of preforms on the gripping end closest to the surface of the conveyor belt, and after the release is completed, the conveyor belt conveys the preforms forward by a distance of one row of preforms;

[0027] Step S13: After a row of preforms is released, the gripping end is controlled to move downward at the same inclination angle until the next row of preforms approaches the surface of the conveyor belt, and the process returns to step S12. The gripping end is controlled to return to its original state until a group of preforms is released.

[0028] Furthermore, the method by which the packing robot transfers the preform to the packaging box is:

[0029] After grabbing the bottle, the packing robot rotates to an angle perpendicular to the packaging box and gradually moves downward to release the preforms horizontally into the packaging box, so that the preforms on the upper layer in the packaging box are stacked in order in the gaps between the connected preforms on the lower layer.

[0030] Compared with the prior art, the present invention has the following beneficial effects:

[0031] (1) The surfaces of the two conveyor belts are relatively inclined to form a "V"-shaped structure, which reduces the movement path of the side-picking robot and the boxing robot from grabbing the bottle preform to transferring the bottle preform, and improves the efficiency of grabbing and releasing the bottle preform;

[0032] (2) The grabbing end of the side-taking robot releases multiple groups of preforms alternately onto the two conveyor belts, so that the preforms on the two conveyor belts are transported alternately and continuously to the packing robot, and then the packing robot is controlled to grab the two conveyor belts alternately in batches, which can avoid the waiting state of the packing robot and improve the packing efficiency;

[0033] (3) The side-picking robot grabs the bottle mouth of the preform, and after the side-picking robot transfers the preform to the inclined conveyor belt, the box packing robot grabs the bottle body of the preform and transfers it to the packaging box, which can reduce the movement path of the box packing robot grabbing the bottle body; at the same time, the preforms are stacked horizontally in the packaging box, so that the preforms on the upper layer of the packaging box are stacked in order in the gaps between the connected preforms on the lower layer, thereby improving the space utilization rate in the packaging box.

[0034] (4) The preform packing and conveying system can effectively avoid collision between the preforms and other objects or between the preforms, and effectively protect the outer surface quality of the preforms. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 This is a schematic diagram of the overall structure of the preform packaging and conveying system in Embodiment 1 of the present invention;

[0036] Figure 2 This is a schematic diagram of the structure of two conveyor belts in Embodiment 1 of the present invention;

[0037] Figure 3 It is a schematic diagram of the side view structure of two conveyor belts in Embodiment 1 of the present invention;

[0038] Figure 4 This is a schematic diagram of the structure of the gripping end releasing the preform on the conveyor belt in the first embodiment of the present invention;

[0039] Figure 5 This is a schematic diagram of the structure of a packing robot grabbing a preform on a conveyor belt in Embodiment 1 of the present invention;

[0040] Figure 6 The figure is a schematic flow chart of the method for packing and conveying preforms in the second embodiment of the present invention.

[0041] In the figure: 1. conveyor belt; 101. limiting groove; 110. first conveyor belt; 120. second conveyor belt; 2. power equipment; 3. side-taking robot; 301. grabbing end; 4. packing robot; 5. packaging box. Implementation

[0042] The present invention is further described below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form a new embodiment.

[0043] Embodiment 1

[0044] A preform packing and conveying system, referring to Figure 1 to Figure 5 As shown, it includes at least one group of conveying components, grabbing components and control systems. By utilizing two relatively inclined conveyor belts 1 to coordinate the working angle and release time interval of the grabbing components, the working efficiency of the entire packing system is maximized.

[0045] Each group of the conveying components includes two conveyor belts 1 arranged side by side, and the conveyor belts 1 are tilted and fixed on the bracket so that the conveyor belts 1 are tilted as a whole; and the two conveyor belts 1 are relatively tilted. In this embodiment, Figure 3 As shown, the extended surfaces of the conveying surfaces of the two conveyor belts 1 intersect at a line, and the vertical plane passing through the intersection line is set as plane O, and the shortest distance between the highest point A on the surfaces of the two conveyor belts 1 and plane O is greater than the shortest distance between the lowest point B on the surfaces of the two conveyor belts 1 and plane O, so that a "V"-shaped structure is formed between the conveying surfaces of the two conveyor belts 1.

[0046] Each of the conveyor belts 1 is provided with a power device 2 connected to the conveyor belt 1 to drive the conveyor belt 1 to move; that is, each of the conveyor belts 1 uses independent power devices 2, so that the moving time and the pause time of the two conveyor belts 1 can be controlled by their respective power devices 2. The power devices 2 are connected to the control system by wires, and the control system can control the power devices 2 to perform start or pause operations, so that when the conveyor belt 1 moves forward at a certain speed, the power devices 2 controlling the two conveyor belts 1 independently control their conveyor belts 1 to stop temporarily according to a pre-set time rule, and control the grabbing assembly to release the bottle preform on the corresponding conveyor belt 1 when the conveyor belt 1 is in a temporarily stopped state, and control the grabbing assembly to grab the bottle preform on the corresponding conveyor belt 1 and transfer it to the packaging box 5, so as to improve the stability of the bottle preform release, so that the conveying assembly and the grabbing assembly cooperate with each other to achieve efficient and smooth boxing action.

[0047] In the present embodiment, the conveyor belts 1 are used to transport preforms. Since the conveyor belts 1 have a certain inclination angle, in order to prevent the preforms from slipping off the conveyor belts 1 when being transported on the conveyor belts 1, limiting grooves 101 are fixed on the conveying surface of each of the conveyor belts 1. Each of the limiting grooves 101 accommodates a preform, and the limiting grooves 101 move with the conveyor belts 1.

[0048] The grabbing assembly includes a side-taking robot 3 and a boxing robot 4 respectively located at the head and tail ends of the conveyor belt 1. The end of the side-taking robot 3 is provided with a grabbing end 301. The grabbing end 301 grabs a group of preforms, wherein the group of preforms is in a matrix structure symmetrically distributed in rows and columns. In this embodiment, the grabbing end 301 grabs the mouth of each preform, so that the body of the preform is perpendicular to the grabbing end 301.

[0049] The side-taking robot 3 is connected to the control system. The control system controls the side-taking robot 3 to release a group of preforms on any one of the conveyor belts 1 in the following principle: the control system controls the side-taking robot 3 to move to the exact position of the preforms, controls the gripping end 301 to move vertically downward to grip the mouth of each preform, and then controls the side-taking robot 3 to drive its gripping end 301 to rotate to a state where the gripping end 301 is perpendicular to the surface of the conveyor belt 1, so that when the gripping end 301 releases the preforms, the bottle bodies of each row of preforms are parallel to the surface of the conveyor belt 1, so that when the gripping end 301 releases the preforms, the preforms can stably and accurately fall into the corresponding limiting grooves 101 of the conveyor belt 1, thereby improving the stability of the preform release process.

[0050] The principle of releasing a group of preforms by the gripping end 301 is as follows: the gripping end 301 releases a whole row of preforms in a group of preforms each time, and when the gripping end 301 moves to a surface perpendicular to the conveyor belt 1, a row of preforms at the lowest end of the gripping end 301 is closest to the surface of the conveyor belt 1, and the row of preforms at the lowest end is released first; after releasing a row of preforms, the gripping end 301 moves downward at the same inclination angle until the next row of preforms is close to the surface of the conveyor belt 1, and then releases the row of preforms, and releases each row of preforms in the above manner in turn, so that each row of preforms can directly fall onto the surface of the conveyor belt 1 when released, until a group of preforms on the gripping end 301 are all released, and at this time the side-taking robot 3 can be controlled to drive the gripping end 301 to return to its original position to grip a new group of preforms. During this period, each time the gripping end 301 is ready to release the preforms, the control system controls the corresponding conveyor belt 1 to pause, so that a row of preforms corresponds to the limiting grooves 101 on the conveyor belt 1 one by one, thereby improving the release accuracy of the preforms; when a row of preforms is released, the gripping end 301 moves to the next row of preforms to align with the conveyor belt 1, and the control system controls the conveyor belt 1 to move, transport the preforms on the conveyor belt 1 forward, and stops again after a set time interval, so that the next row of preforms of the gripping end 301 can be released on the conveyor belt 1 closely following the previous row of preforms, thereby avoiding vacancies on the conveyor belt 1 that affect subsequent packing steps.

[0051] The control system controls the side-taking robot 3 to grab multiple groups of bottle preforms in sequence and release the multiple groups of bottle preforms alternately on the two conveyor belts 1 in sequence, that is, the previous group of bottle preforms is completely released on the same conveyor belt 1, and the next group of bottle preforms can be released on the other conveyor belt 1, so that the two conveyor belts 1 always keep one of the conveyor belts 1 to transport the bottle preforms after loading to the front for the packing robot 4 to grab, and at the same time the other conveyor belt 1 is loading, so that the packing robot 4 can grab bottle preforms from the two conveyor belts 1 alternately and in batches, that is, after grabbing a group of bottle preforms in batches from the same conveyor belt 1, it moves to the other conveyor belt 1 to grab another group of bottle preforms, so as to avoid a long pause in the process of the grabbing end 301 grabbing a new group of bottle preforms, resulting in the conveyor belt 1 being unable to transport enough bottle preforms to the front in time for the packing robot 4 to grab, resulting in low efficiency of the packing robot 4.

[0052] The packing robot 4 is also connected to the control system. The control system controls the grabbing rhythm of the packing robot 4 to match the transportation time of the two conveyor belts 1, so that it alternately grabs the bottle preforms on the two conveyor belts 1 to avoid the packing robot 4 from pausing. Since the bottle preforms on the conveyor belts 1 are in an inclined state, the packing robot 4 can be controlled to move to an angle perpendicular to the surface of the conveyor belt 1, so that the packing robot 4 directly grabs the bottle body of the bottle preform and transfers it in batches to the packaging box 5. The packing robot 4 grabs the position of the bottle body of the bottle preform so that the bottle preforms are stacked in the packaging box 5 in a manner parallel to the bottom of the packaging box 5.

[0053] The control system is connected with the power equipment 2, the side-taking robot 3 and the packing robot 4 on the two conveyor belts 1. The control system controls the gripping end 301 of the side-taking robot 3 to sequentially grip multiple groups of bottle preforms and release the multiple groups of bottle preforms alternately on the two conveyor belts 1; and controls the power equipment 2 to control the moving conveyor belt 1 to temporarily pause according to the time interval of releasing the bottle preforms by the gripping end 301; and then controls the packing robot 4 to alternately grab the bottle bodies of the bottle preforms on the two conveyor belts 1 in batches, and transfer them in batches to the packaging box 5, so that the bottle preforms on the upper layer of the packaging box 5 are stacked in order in the gaps between the connected bottle preforms on the lower layer, thereby increasing the number of bottle preforms stored in the packaging box 5, and preventing the bottle preforms from tipping over in the packaging box 5 to affect the packaging efficiency, thereby improving the packaging stability.

[0054] The angle between the extended surfaces of the two conveyor belts 1 is set to 60°~160°. In the present embodiment, the angle between the extended surfaces of the two conveyor belts 1 is 120°. If the inclination angle of the conveyor belt 1 is too gentle or even close to a plane, the rotation amplitude of the side-taking robot 3 and the boxing robot 4 will be large, resulting in relatively low efficiency. If the inclination angle of the conveyor belt 1 is too steep or even close to 90°, the preform will easily fall off after falling on the conveyor belt 1, resulting in poor stability.

[0055] The extended surfaces of the two conveyor belts 1 intersect at the O line, and the angles between the vertical plane passing through the O line and the extended surfaces of the two conveyor belts 1 are the same, that is, the inclination angles of the two conveyor belts 1 are the same. In this embodiment, the angles between the conveying surfaces of the two conveyor belts 1 and the horizontal plane are both 30°, which can improve the accuracy of the side-picking robot 3 when alternately grabbing the bottle blanks on the two conveyor belts 1.

[0056] Embodiment 2

[0057] This embodiment provides a preform boxing conveying method, which is applied to the preform boxing conveying system as described in the first embodiment, and can also maximize the working efficiency of the entire boxing system. In addition, in order to distinguish the two conveyor belts 1 in the preform boxing conveying system as described in the first embodiment, the two conveyor belts 1 are respectively named as the first conveyor belt 110 and the second conveyor belt 120 in this embodiment.

[0058] Reference Figure 6 As shown, the preform packaging and conveying method of this embodiment specifically includes the following steps:

[0059] Step S1: the control system controls the gripping end 301 of the side-taking robot 3 to grip the mouths of a group of preforms and move them to the first conveyor belt 110, controls the first conveyor belt 110 to temporarily pause at a time interval for releasing the preforms, and controls the gripping end 301 to release a group of preforms row by row on the first conveyor belt 110 when the conveyor belt 110 pauses.

[0060] The method for releasing the preform by the side-taking robot 3 is as follows:

[0061] Step S11: the side-taking robot 3 controls the gripping end 301 thereof to move and rotate to an inclined angle perpendicular to the surface of the conveyor belt 1 , so that a row of preforms at the lowest end of the gripping end 301 is close to and parallel to the surface of the conveyor belt 1 ;

[0062] Step S12: releasing a row of preforms on the gripping end 301 closest to the surface of the conveyor belt 1; at this time, the conveyor belt 1 is paused at a preset time interval, so that a row of preforms at the lowest end of the gripping end 301 is aligned with and released to the limiting groove 101 on the conveyor belt 1; after the release is completed, the conveyor belt 1 conveys the preforms forward by a distance of one row of preforms;

[0063] Step S13: After a row of preforms is released, the gripping end 301 is controlled to move downward at the same inclination angle until the next row of preforms approaches the surface of the conveyor belt 1; then, the process returns to step S12 to release the row of preforms until the gripping end 301 releases a group of preforms, and then the gripping end 301 is controlled to return to its original state to grip another group of preforms.

[0064] Step S2: Control the side-taking robot 3 to grab the bottle mouths of another group of preforms, and release the preforms row by row on the second conveyor belt 120 according to the method of step S1; during this period, the first conveyor belt 110 transports a group of preforms to the end where the box packing robot 4 is located, and controls the box packing robot 4 to move to a position perpendicular to the first conveyor belt 110, grabs the bottle bodies of the preforms on the conveyor belt 1 in batches and transfers them to the packaging box 5, until a group of preforms on the first conveyor belt 110 are completely transferred.

[0065] Step S3: Returning to step S1, when the side-picking robot 3 grabs another group of preforms and releases them on the first conveyor belt 110, the second conveyor belt 120 in step S2 transports a group of preforms to the end where the box packing robot 4 is located, and controls the box packing robot 4 to move to a position perpendicular to the second conveyor belt 120, grabs the bottle bodies of the preforms on the conveyor belt 1 in batches and transfers them to the packaging box 5, until the group of preforms on the second conveyor belt 120 are completely transferred.

[0066] The method by which the packing robot 4 transfers the preforms to the packaging box 5 is as follows:

[0067] After grabbing the bottle, the packing robot 4 rotates to an angle perpendicular to the packaging box 5 and gradually moves downward to release the preforms horizontally into the packaging box 5, so that the preforms on the upper layer of the packaging box 5 are stacked in order in the gaps between the connected preforms on the lower layer.

[0068] In this embodiment, the side-taking robot 3 releases multiple groups of preforms alternately onto two relatively inclined conveyor belts 1, that is, during the loading process of the first conveyor belt 110, the second conveyor belt 120 transports the loaded preforms to the front, allowing the boxing robot 4 to grab the preforms on the second conveyor belt 120 and transfer them to the packaging box 5; when a group of preforms on the second conveyor belt 120 are all transferred to the packaging box 5, the first conveyor belt 110 completes the loading action and transports the preforms to the front, at which time the boxing robot 4 switches the grabbing direction to grab the preforms on the first conveyor belt 110; the boxing steps are circulated in the above method, so that the boxing rhythm of the boxing robot 4 is compact, the boxing robot 4 is prevented from being idle, and the working efficiency of the entire boxing system is maximized.

[0069] The above-mentioned embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. A preform packaging and conveying system, characterized in that: include: The conveyor assembly comprises two conveyor belts arranged side by side, and the two conveyor belts are relatively inclined to form a "V"-shaped structure; each of the conveyor belts is provided with a power device for driving the conveyor belt to move; A gripping assembly, comprising a side-taking robot and a packing robot respectively located at the head and tail ends of the conveyor belt, wherein the gripping end of the side-taking robot grips the mouth of a group of preforms, and the packing robot grips the body of the preforms on any one of the conveyor belts; the group of preforms gripped by the gripping end is in a matrix structure, the gripping end releases a row of preforms in a group of preforms each time, and after each row of preforms is released, the gripping end moves downward at the same inclination angle until the next row of preforms approaches the surface of the conveyor belt, so that each row of preforms falls directly onto the surface of the conveyor belt when released; the packing robot rotates to an angle perpendicular to the conveyor belt to grasp the body of the preforms; A control system is connected to the power equipment of the two conveyor belts, the side-taking robot and the boxing robot. The control system controls the grabbing end of the side-taking robot to grab multiple groups of bottle preforms in sequence and release the multiple groups of bottle preforms alternately on the two conveyor belts in sequence; and controls the power equipment to control the moving conveyor belt to temporarily pause according to the time interval of releasing the bottle preforms by the grabbing end; and then controls the boxing robot to alternately grab the bottle bodies of the bottle preforms on the two conveyor belts in batches, and transfer them in batches into packaging boxes.

2. The preform packaging and conveying system according to claim 1, characterized in that: The angle between the extended surfaces of the two conveyor belts is set to 60° to 160°.

3. The preform packaging and conveying system according to claim 2, characterized in that: The extended surfaces of the two conveyor belts intersect, and a vertical plane passing through the intersection line is set as an O plane, and the angles between the O plane and the extended surfaces of the two conveyor belts are the same.

4. The preform packaging and conveying system according to claim 3, characterized in that: The shortest distance between the highest points of the two conveyor belt surfaces and the O surface is greater than the shortest distance between the lowest points of the two conveyor belt surfaces and the O surface.

5. The preform packaging and conveying system according to claim 1, characterized in that: The body of the preform is perpendicular to the gripping end, and the side-taking robot drives its gripping end to rotate until the gripping end is perpendicular to the surface of the conveyor belt, so that when the gripping end releases the preform, the body of the preform is parallel to the surface of the conveyor belt.

6. A method for conveying preforms in boxes, characterized in that: The preform packaging and conveying system as claimed in any one of claims 1 to 5 comprises: Step S1: controlling the gripping end of the side-taking robot to grip a group of bottle mouths of preforms and move them to the first conveyor belt, controlling the first conveyor belt to temporarily pause according to the time interval of releasing the bottle preforms, and controlling the gripping end to release a group of bottle preforms row by row on the first conveyor belt when the conveyor belt pauses; Step S2: Control the side-picking robot to grab the mouths of another group of preforms, and release the preforms row by row onto the second conveyor belt according to the method of step S1; during this period, the first conveyor belt transports a group of preforms to one end where the box packing robot is located, and controls the box packing robot to move to a position perpendicular to the first conveyor belt, grabs the bottle bodies of the preforms on the conveyor belt in batches and transfers them to the packaging box, until a group of preforms on the first conveyor belt are completely transferred; Step S3: Returning to step S1, when the side-picking robot grabs another group of preforms and releases them on the first conveyor belt, the second conveyor belt in step S2 transports a group of preforms to the end where the case packing robot is located, and the case packing robot is controlled to move to a position perpendicular to the second conveyor belt, grabs the bottle bodies of the preforms on the conveyor belt in batches and transfers them to the packaging box until the group of preforms on the second conveyor belt is completely transferred.

7. The method for packing and conveying preforms according to claim 6, characterized in that: The method for releasing the preform by the side-taking robot in step S1 is: Step S11: the side-taking robot controls the gripping end thereof to move and rotate to an inclined angle perpendicular to the conveyor belt, so that a row of preforms located at the lowest end of the gripping end is close to the surface of the conveyor belt; Step S12: releasing a row of preforms on the gripping end closest to the surface of the conveyor belt, and after the release is completed, the conveyor belt conveys the preforms forward by a distance of one row of preforms; Step S13: After a row of preforms is released, the gripping end is controlled to move downward at the same inclination angle until the next row of preforms approaches the surface of the conveyor belt, and the process returns to step S12. The gripping end is controlled to return to its original state until a group of preforms is released.

8. The method for packing and conveying preforms according to claim 6, characterized in that: The method for the packing robot to transfer the bottle preforms to the packaging box is as follows: after grabbing the bottle body, the packing robot rotates to an angle perpendicular to the packaging box and gradually moves downward, releasing the bottle preforms horizontally into the packaging box, so that the bottle preforms on the upper layer in the packaging box are stacked in order in the gaps between the connected bottle preforms on the lower layer.

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