Nest box film tearing method

Abstract

The invention discloses a nest box film tearing method which comprises a nest box fixing and reversing mechanism arranged at a film tearing station of a conveying mechanism, a film tearing mechanism and a film tearing detection sensor arranged at a film recycling mechanism, and further comprises the following steps that S1, a nest box is conveyed to the film tearing station and fixed; the film tearing mechanism is used for tearing the film for the first time after clamping the film at the first box corner of the nest box; s2, a film tearing mechanism moves to a film recycling mechanism, a film tearing detection sensor detects whether a film exists or not, and if yes, the nest box is output to the next station; otherwise, turning to the step S3; and S3, the nest box is reversed through the nest box fixing and reversing mechanism, and after the film is clamped at the second box corner of the nest box through the film tearing mechanism, secondary film tearing is conducted till film tearing is completed. Compared with the prior art, the nest box fixing and reversing mechanism is additionally arranged at the film tearing station, secondary film tearing is achieved, the success rate of film tearing is increased, and waste of packing materials is reduced; and secondly, automatic production is facilitated.

Description

Technical Field

[0001] The invention relates to the technical field of packaging box film tearing, in particular to a nest box film tearing method. Background Art

[0002] Pre-filled inner packaging machine, after the nest box enters the film tearing station, the film paper needs to be torn off. The patent with publication number CN105752425B discloses an automatic film tearing device for a pre-filled machine, including a film tearing component and a three-dimensional component that can move in three dimensions, the three-dimensional component is connected to the film tearing component, and the three-dimensional directions of the three-dimensional component are: X-axis direction, Y-axis direction and Z-axis direction, the three-dimensional component moves in each dimensional direction, driving the film tearing component to tear off the sealing film of the needle tube disk from the needle tube disk along the diagonal direction of the needle tube disk (nest box) of the pre-filled machine. Because the film paper has folded edges or the film tearing component does not clamp the film paper, etc., the film tearing failure will occur. At present, there are two processing methods after the film tearing fails: 1. directly discard the box; 2. manually tear off the film paper. Both methods have defects. Direct discarding will result in waste of packaging materials, and manual film tearing operation is not very convenient and is not conducive to automated production. Summary of the invention

[0003] The invention provides a nest box film tearing method, which is used to solve the problems in the prior art that packaging materials are wasted by directly rejecting the failed film tearing and manual film tearing is not conducive to automated production.

[0004] The present invention provides a nest box film tearing method, comprising a nest box fixed reversing mechanism arranged at a film tearing station of a conveying mechanism, a film tearing mechanism and a film tearing detection sensor arranged at a film recovery mechanism, and also comprising the following steps:

[0005] Step S1: The nest box is transported to the film tearing station and fixed, and the film tearing mechanism performs the first film tearing after clamping the film at the first box corner of the nest box;

[0006] Step S2: the film tearing mechanism moves to the film recovery mechanism, and the film tearing detection sensor detects whether there is film. If there is, the nest box is output to the next station; otherwise, it goes to step S3;

[0007] Step S3: the nest box fixed reversing mechanism reverses the nest box, and the film tearing mechanism clamps the film at the second box corner of the nest box and then tears the film for the second time until the film tearing is completed.

[0008] Preferably, in step S3, the specific steps of the nest box fixed reversing mechanism reversing the nest box are: the nest box fixed reversing mechanism sucks the nest box and lifts up the nest box and then rotates the nest box on a horizontal plane, and during the rotation process, the second box corner of the nest box is swapped with the first box corner.

[0009] Preferably, in step S1, the specific steps of fixing the nest box at the film tearing station are: closing the baffle of the nest box fixing reversing mechanism to block the nest box, and then closing the clamping plate of the nest box fixing reversing mechanism, and the baffle and the clamping plate cooperate to fix the nest box.

[0010] Preferably, in step S3, the specific process of swapping the positions of the second box corner and the first box corner and fixing the nest box is: opening the clamping plate, the nest box fixing reversing mechanism sucks the nest box and lifts up the nest box, opening the baffle, and the nest box fixing reversing mechanism rotates the nest box 180 degrees. 0 , and then close the baffle, the nest box fixing reversing mechanism lowers the nest box, closes the clamping plate, and the baffle and the clamping plate cooperate to fix the nest box.

[0011] Preferably, in step S3, the nest box fixing reversing mechanism lowering the nest box comprises the following steps: the nest box falls onto the conveying mechanism, and the nest box fixing reversing mechanism continues to descend and separates from the nest box.

[0012] Preferably, in step S2, the specific steps of the film tearing detection sensor detecting whether there is a film are: after the film tearing mechanism tears the film, the film tearing mechanism moves to the film recovery mechanism, and the film tearing detection sensor senses whether there is a film on the film tearing mechanism and falls into the film recovery mechanism.

[0013] Preferably, the nest box fixed reversing mechanism includes: a suction cup, a lifting cylinder and a first rotating cylinder. The suction cup passes through the conveying mechanism and sucks the bottom of the nest box by vacuuming. The nest box reversing mechanism sucks the nest box and lifts the nest box by the lifting cylinder. The nest box reversing mechanism rotates the nest box by the first rotating cylinder.

[0014] Preferably, in step S1, when the baffle and the clamp cooperate to fix the nest box: the baffle is located at the front end of the nest box, and the clamp is located at the rear end of the nest box.

[0015] Preferably, the lower end of the baffle is connected to a second rotary cylinder, and the baffle opens and closes the nest box by rotating. The lower end of the clamp is connected to a third rotary cylinder, and the clamp opens and closes the nest box by rotating.

[0016] Preferably, both the clamping plate and the baffle are provided with limiting grooves adapted to the corners of the nest box, and the limiting grooves can limit the two side edges of the nest box.

[0017] Compared with the prior art, the present invention adds a nest box fixed reversing mechanism to the film tearing station to achieve secondary film tearing. When the film tearing detection sensor detects that the first film tearing fails, the film paper is loose after a part of the film is torn off, and the film paper at the original angle has no fixed point, and it is impossible to smooth the edge and clamp the film again, so that the film cannot be torn off again at this point. The film tearing station rotates the nest box 180 degrees through the nest box fixed reversing mechanism. 0Finally, the undamaged end of the nest box reaches the film removal position, and the film is torn off for the second time by the film tearing robot, which improves the success rate of film tearing and reduces the waste of packaging materials; secondly, it is conducive to automated production. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is a workflow diagram of the nest box film tearing of the present invention;

[0020] Figure 2 It is a structural schematic diagram of the device involved in the nest box film tearing of the present invention;

[0021] Figure 3 for Figure 2 Top view of the nest box (nest box closed);

[0022] Figure 4 for Figure 2 Right side view (nest box not raised);

[0023] Figure 5 for Figure 2 Top view (open nest box);

[0024] Figure 6 for Figure 2 Right side view (nest box raised).

[0025] Reference numerals:

[0026] 1. Nest box, 11. First box corner, 12. Second box corner, 2. Conveying mechanism, 3. Nest box fixed reversing mechanism, 31. Baffle, 32. Clamp, 33. Second rotary cylinder, 34. Third rotary cylinder, 35. Suction cup, 36. Railing, 4. Film recovery mechanism, 5. Film tearing mechanism, 6. Film tearing detection sensor, 100. Limiting groove. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] Refer to the attached Figure 1-3This embodiment provides a nest box film tearing method, including a nest box fixed reversing mechanism 3, a film tearing mechanism 5 and a film tearing detection sensor 6 arranged at the film recovery mechanism 4, which are arranged at the film tearing station of the conveying mechanism 2, and also includes the following steps:

[0029] Step S1: The nest box 1 is transported to the film tearing station and fixed by the nest box fixing reversing mechanism 3. The position of the nest box 1 after fixation is determined, and the first box corner 11 of the nest box 1 is the film taking position of the film tearing mechanism 5. The specific fixing method is: when the nest box 1 is transported along the length direction of the conveying mechanism 2, the nest box fixing reversing mechanism 3 will first position the nest box 1 in the width direction of the conveying mechanism 2, that is, the nest box 1 is transported on the conveying mechanism 2 along a predetermined trajectory, and then fixed after arriving at the film tearing station. At this time, the position of the nest box 1 in the length direction and the width direction on the conveying mechanism 2 are determined. The film tearing mechanism 5 performs the first film tearing after clamping the film at the first box corner 11; specifically, the film tearing mechanism 5 is a film tearing robot, and the film taking hand of the film tearing robot clamps the film at the first box corner 11, and then tears off the film on the nest box 1 along the diagonal direction (in the attached Figure 3 In the embodiment, the film is torn from the first box corner 11 to the second box corner 12).

[0030] Step S2: The film tearing mechanism 5 moves to the film recovery mechanism 4, and the film tearing detection sensor 6 detects whether there is film. If there is, the nest box 1 is output to the next station; otherwise, it goes to step S3; when the film tearing detection sensor 6 detects that the film tearing fails, it means that the film paper falls off during the film tearing, and the film paper at the first box corner 11 is loosened, and it is impossible to smooth the edge and clamp the film again. This situation will cause the film tearing robot to be unable to clamp the film paper at the box corner normally, and it is impossible to tear the film again at this end.

[0031] Step S3: the nest box fixed reversing mechanism 3 reverses the nest box 1 so that the position of the second box corner 12 is swapped with the position of the first box corner 11. The second box corner 12 of the nest box 1 becomes the film taking position of the film tearing mechanism 5. The second box corner 12 of the nest box 1 is away from the first box corner 11 and is not damaged. The film tearing mechanism 5 clamps the film at the second box corner 12 and then tears the film for the second time until the film tearing is completed.

[0032] In step S3, the specific steps of the nest box fixed reversing mechanism 3 reversing the nest box 1 are as follows: Figure 6The nest box fixing reversing mechanism 3 sucks the nest box 1 and lifts up the nest box 1, and then rotates the nest box 1 on the horizontal plane, and in the process of rotation, the second box corner 12 of the nest box 1 is swapped with the first box corner 11. In this step, the nest box 1 is lifted up to separate the nest box 1 from the conveying mechanism 2, and the operation of the conveying mechanism 2 will not affect the subsequent rotation of the nest box 1. Through this rotation, the second box corner 12 becomes the film taking position of the film tearing robot, and the conveying mechanism 2 does not need to stop running, and the other stations of the pre-filling and inner packaging machine do not need to stop running, which is conducive to improving the working efficiency of the pre-filling and inner packaging machine.

[0033] The nest box fixing reversing mechanism 3 includes a clamping plate 32 and a baffle 31. In step S1, the specific steps of fixing the nest box 1 at the film tearing station are: closing the baffle 31 to block the nest box 1, and then closing the clamping plate 32. Figure 3-4 , the baffle plate 31 and the clamp plate 32 cooperate to fix the nest box 1. At this time, the baffle plate 31 is located at the front end of the nest box 1, and the clamp plate 32 is located at the rear end of the nest box 1.

[0034] In step S3, the conveying mechanism 2 does not stop running, and the specific process of swapping the positions of the second box corner 12 and the first box corner 11 and fixing the nest box 1 is as follows: Figure 5 , open the clamp 32, release the restriction on the nest box 1, but the baffle 31 will still block the nest box 1 from being transported with the conveying mechanism 2, the nest box fixing reversing mechanism 3 sucks the nest box 1 and lifts up the nest box 1, the nest box 1 leaves the conveying mechanism 2, and opens the baffle 31 to prevent the baffle 31 from interfering with the rotation of the nest box 1. The nest box fixing reversing mechanism 3 rotates the nest box 1 180 0 The second box corner 12 is rotated to the position of the first box corner 11. At this time, the first box corner 11 is rotated to the position of the second box corner 12, that is, the first box corner 11 and the second box corner 12 are swapped, and the second box corner 12 becomes the film taking position of the film tearing robot. Then the baffle 31 is closed, the nest box fixing reversing mechanism 3 lowers the nest box 1, and the clamping plate 32 is closed. The baffle 31 and the clamping plate 32 cooperate to fix the nest box 1.

[0035] In step S3, the nest box fixing reversing mechanism 3 lowers the nest box 1, including the following steps: the nest box 1 falls onto the conveying mechanism 2, and the nest box fixing reversing mechanism 3 continues to descend and separates from the nest box 1, so that the nest box fixing reversing mechanism 3 reduces the impact on the nest box 1 in subsequent processes.

[0036] Among them, in step S2, the specific steps for the film tearing detection sensor 6 to detect whether there is a film are as follows: after the film tearing mechanism 5 tears the film, the film taking hand of the film tearing mechanism 5 runs to the film recovery mechanism 4, and the film taking hand will complete the action of throwing the film in the film recovery mechanism 4. During this process, the film tearing detection sensor 6 determines whether the film tearing is successful by sensing whether there is a film falling into the film recovery mechanism 4.

[0037] The specific structure of the nest box fixed reversing mechanism 3 is as follows: the nest box fixed reversing mechanism 3 includes a suction cup 35, a lifting cylinder and a first rotating cylinder. The suction cup 35 passes through the conveying mechanism 2 and sucks the bottom of the nest box 1 by vacuuming. The nest box fixed reversing mechanism 3 sucks the nest box 1 and lifts the nest box 1 by the lifting cylinder. The nest box fixed reversing mechanism 3 rotates the nest box 1 by the first rotating cylinder. The conveying mechanism 2 includes two conveyor belts arranged side by side, and the suction cup 35, the lifting cylinder and the first rotating cylinder are all located between the two conveyor belts.

[0038] One embodiment of the clamping plate 32 and the baffle plate 31 fixing the nest box 1 is as follows: the lower end of the baffle plate 31 is connected to the second rotary cylinder 33, and the baffle plate 31 opens and closes the nest box 1 by rotating; the lower end of the clamping plate 32 is connected to the third rotary cylinder 34, and the clamping plate 32 opens and closes the nest box 1 by rotating. In this embodiment, opening the nest box 1 is to release the restriction on the nest box 1, and closing the nest box 1 is to restrict the nest box 1.

[0039] One embodiment of fixing the nest box 1 by the clamping plate 32 and the baffle plate 31 is that both the clamping plate 32 and the baffle plate 31 are provided with limiting grooves 100 adapted to the corners of the nest box 1, and the limiting grooves 100 can limit the two sides of the nest box 1. The four limiting grooves 100 limit the four corners of the nest box 1 to fix the nest box 1.

[0040] One implementation method of positioning the nest box 1 is as follows: the nest box fixing reversing mechanism 3 includes two rails capable of adjusting the distance. When the nest box 1 is conveyed between the two rails along the length direction of the conveying mechanism 2, the distance between the two rails is consistent with the width of the nest box 1, thereby completing the positioning of the nest box 1 in the width direction of the conveying mechanism 2. The two rails complete the positioning of the nest box 1 in the width direction of the conveying mechanism 2, and the baffle 31 and the clamping plate 32 complete the positioning of the nest box 1 in the length direction of the conveying mechanism 2, ensuring that the relative position of the nest box 1 and the nest box fixing reversing mechanism 3 is determined during reversal, thereby ensuring that there will be no deviation when the positions of the second box corner 12 and the first box corner 11 are swapped.

[0041] Specifically, when the nest box 1 enters the film tearing station, the distance sensor senses the nest box 1 and closes the baffle 31 so that the baffle 31 blocks the nest box 1 .

[0042] Refer to the attached Figure 1, wherein, in step S2, if the film tearing fails, three options, namely, "Film tearing successfully", "Film tearing and rejection", and "Second film tearing" are displayed on the screen; if the option "Film tearing successfully" is selected, the nest box 1 is output to the next station for work; if the option "Film tearing and rejection" is selected, the nest box 1 flows into the rejection station; if the option "Second film tearing" is selected, the process proceeds to step S3. After step S3 is executed, the film tearing detection sensor 6 still fails to tear the film after detection. At this time, only two options, namely, "Film tearing successfully" and "Film tearing and rejection", are displayed on the screen; if the option "Film tearing successfully" is selected, the nest box 1 is output to the next station for work; if the option "Film tearing and rejection" is selected, the nest box 1 flows into the rejection station. The reason for this structural design is that after the second film tearing, the films on the corners of the nest box 1 may have been damaged, and it is difficult for the film remover to clamp the film from the corners.

[0043] In the present invention, a nest box fixed reversing mechanism 3 is added to the film tearing station to realize secondary film tearing. When the film tearing detection sensor 6 detects that the first film tearing fails, the film paper is loose after a part of the film is torn off, and the film paper at the original angle has no fixed point, and it is impossible to smooth the edge and clamp the film again, so that the film cannot be torn off again at this point. The film tearing station rotates the nest box 1 180 degrees through the nest box fixed reversing mechanism 3. 0 Finally, the undamaged end of the nest box 1 reaches the film taking position, and the film is torn off for the second time by the film tearing robot, which improves the success rate of film tearing and reduces the waste of packaging materials; secondly, it is conducive to automated production.

[0044] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A nest box film tearing method, characterized in that: The invention comprises a nest box fixing reversing mechanism (3) arranged at the film tearing station of the conveying mechanism (2), a film tearing mechanism (5) and a film tearing detection sensor (6) arranged at the film recovery mechanism (4), and also comprises the following steps: Step S1: the nest box (1) is transported to the film tearing station and fixed, and the film tearing mechanism (5) performs the first film tearing after clamping the film at the first box corner (11) of the nest box (1); Step S2: the film tearing mechanism (5) moves to the film recovery mechanism (4), and the film tearing detection sensor (6) detects whether there is film. If there is, the nest box (1) is output to the next station; otherwise, it goes to step S3; Step S3: the nest box fixed reversing mechanism (3) reverses the nest box (1), and the film tearing mechanism (5) clamps the film at the second box corner (12) of the nest box (1) and then tears the film for the second time until the film tearing is completed.

2. The nest box film tearing method according to claim 1, characterized in that: In step S3, the specific steps of the nest box fixed reversing mechanism (3) reversing the nest box (1) are as follows: the nest box fixed reversing mechanism (3) sucks the nest box (1) and lifts up the nest box (1), and then rotates the nest box (1) on a horizontal plane, and in the process of rotation, the positions of the second box corner (12) and the first box corner (11) of the nest box (1) are swapped.

3. The nest box film tearing method according to claim 2, characterized in that: In step S1, the specific steps of fixing the nest box (1) at the film tearing station are: closing the baffle (31) of the nest box fixing reversing mechanism (3) to block the nest box (1), and then closing the clamping plate (32) of the nest box fixing reversing mechanism (3), and the baffle (31) and the clamping plate (32) cooperate to fix the nest box (1).

4. The nest box film tearing method according to claim 3, characterized in that: In step S3, the specific process of swapping the positions of the second box corner (12) and the first box corner (11) and fixing the nest box (1) is as follows: the clamping plate (32) is opened, the nest box fixing reversing mechanism (3) sucks the nest box (1) and lifts up the nest box (1), the baffle plate (31) is opened, and the nest box fixing reversing mechanism (3) rotates the nest box (1) by 180 degrees. 0 Then, the baffle (31) is closed, the nest box fixing reversing mechanism (3) lowers the nest box (1), and the clamping plate (32) is closed, and the baffle (31) and the clamping plate (32) cooperate to fix the nest box (1).

5. The nest box film tearing method according to claim 4, characterized in that: In step S3, the nest box fixing reversing mechanism (3) lowers the nest box (1) including the following steps: the nest box (1) falls onto the conveying mechanism (2), and the nest box fixing reversing mechanism (3) continues to descend and separates from the nest box (1).

6. The nest box film tearing method according to claim 1, characterized in that: In step S2, the specific steps of the film tearing detection sensor (6) detecting whether there is a film are as follows: after the film tearing mechanism (5) has performed film tearing, the film tearing mechanism (5) moves to the film recovery mechanism (4), and the film tearing detection sensor (6) senses whether there is a film on the film tearing mechanism (5) and falls into the film recovery mechanism (4).

7. The nest box film tearing method according to claim 4, characterized in that: The nest box fixing reversing mechanism (3) comprises: a suction cup (35), a lifting cylinder and a first rotating cylinder; the suction cup (35) passes through the conveying mechanism (2) and then sucks the bottom of the nest box (1) by vacuuming; the nest box reversing mechanism (4) sucks the nest box (1) and then lifts the nest box (1) by the lifting cylinder; the nest box reversing mechanism (4) rotates the nest box (1) by the first rotating cylinder.

8. The nest box film tearing method according to claim 3, characterized in that: In step S1, when the baffle (31) and the clamp (32) cooperate to fix the nest box (1), the baffle (31) is located at the front end of the nest box (1), and the clamp (32) is located at the rear end of the nest box (1).

9. The nest box film tearing method according to claim 8, characterized in that: The lower end of the baffle (31) is connected to a second rotary cylinder (33), and the baffle (31) opens and closes the nest box (1) by rotating. The lower end of the clamp (32) is connected to a third rotary cylinder (34), and the clamp (32) opens and closes the nest box (1) by rotating.

10. The nest box film tearing method according to claim 9, characterized in that: The clamping plate (32) and the baffle plate (31) are both provided with limiting grooves (100) adapted to the corners of the nest box (1), and the limiting grooves (100) are capable of limiting two side edges of the nest box (1).

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