Nest box film tearing method

Abstract

The present invention discloses a nest box film tearing method, comprising a nest box fixed reversing mechanism, a film tearing mechanism, and a film tearing detection sensor arranged at a film tearing station of a conveying mechanism, and further comprising the following steps: Step S1: The nest box is conveyed to the film tearing station and fixed, and the film tearing mechanism performs a first film tearing after clamping the film at the first box corner of the nest box; Step S2: The film tearing mechanism moves to the film recovery mechanism, and the film tearing detection sensor detects whether there is film. If so, the nest box is output to the next station; otherwise, the process proceeds to Step S3; Step S3: The nest box fixed reversing mechanism reverses the nest box, and the film tearing mechanism performs a second film tearing after clamping the film at the second box corner of the nest box, until the film tearing is completed. 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, thereby improving the success rate of film tearing and reducing packaging material waste; secondly, it is conducive to automated production.

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] The pre-filled packaging machine needs to tear off the film after the nest box enters the film tearing station. The patent with publication number CN105752425B discloses an automatic film tearing device for a pre-filled packaging machine, including a film tearing assembly and a three-dimensional assembly that can move in three dimensions. The three-dimensional assembly is connected to the film tearing assembly. The three dimensional directions of the three-dimensional assembly are: X-axis direction, Y-axis direction and Z-axis direction. The three-dimensional assembly moves in each dimensional direction, driving the film tearing assembly to tear off the sealing film of the needle tube tray (nest box) of the pre-filled packaging machine from the needle tube tray. Because the film paper has folded edges or the film tearing assembly does not clamp the film paper, the film tearing failure may occur. Currently, there are two ways to deal with the failure of film tearing: 1. directly discard the box; 2. manually tear off the film paper. Both methods have defects. Direct rejection 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 for solving the problems in the prior art of directly rejecting packaging materials after film tearing failure and manual film tearing being disadvantageous for automated production.

[0004] The present invention provides a nest box film tearing method, comprising a nest box fixed reversing mechanism and a film tearing mechanism arranged at a film tearing station of a conveying mechanism, and a film tearing detection sensor arranged at a film recovery mechanism, and further 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 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 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 position of the second box corner with the first box corner and fixing the nest box is as follows: opening the clamping plate, the nest box fixing reversing mechanism sucks the nest box and lifts the nest box, opening the baffle, and the nest box fixing reversing mechanism rotates the nest box 180 degrees. 0 , then close the baffle, the nest box fixing reversing mechanism lowers the nest box, close the clamping plate, and the baffle and clamping plate cooperate to fix the nest box.

[0011] Preferably, in step S3, the step of lowering the nest box by the nest box fixing and reversing mechanism comprises the following steps: the nest box falls onto the conveying mechanism, and the nest box fixing and 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 runs 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 fixing and 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 fixing and reversing mechanism sucks the nest box and lifts the nest box by the lifting cylinder. The nest box fixing and reversing mechanism rotates the nest box by the first rotating cylinder.

[0014] Preferably, in step S1, when the baffle and the clamping plate cooperate to fix the nest box: the baffle is located at the front end of the nest box, and the clamping plate 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 clamping plate is connected to a third rotary cylinder, and the clamping plate 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 following briefly introduces the drawings required for use in the embodiments or the description of the prior art. 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 any creative work.

[0019] Figure 1 The figure is a workflow diagram for tearing the film of the nest box 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 (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] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall 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, comprising a nest box fixed reversing mechanism 3, a film tearing mechanism 5, and a film tearing detection sensor 6 provided at a film recovery mechanism 4, provided at a film tearing station of a conveying mechanism 2, and further comprising 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 both 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 process, 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, where the film tearing detection sensor 6 detects whether film is present. If so, the nest box 1 is moved to the next station. Otherwise, the process proceeds to step S3. If the film tearing detection sensor 6 detects that the film tearing has failed, it indicates that the film has fallen off during the tearing process, and the film at the first box corner 11 has loosened, making it impossible to smooth the edge and clamp the film again. This situation will cause the film tearing robot to be unable to properly clamp the film at the box corner, and it will be unable to tear the film at that end again.

[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 it up, then rotates it on a horizontal plane. During the rotation, the second corner 12 of the nest box 1 is swapped with the first corner 11. In this step, the nest box 1 is lifted to separate it from the conveying mechanism 2. The operation of the conveying mechanism 2 does not affect the subsequent rotation of the nest box 1. Through this rotation, the second corner 12 becomes the film removal position of the film tearing robot. The conveying mechanism 2 does not need to stop operating, and the other stations of the pre-filling, sealing and inner packaging unpacking machine do not need to stop operating, which helps to improve the working efficiency of the pre-filling, sealing and inner packaging unpacking machine.

[0033] Among them, 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, referring to the attached Figure 3-4 , the baffle 31 and the splint 32 cooperate to fix the nest box 1. At this time, the baffle 31 is located at the front end of the nest box 1, and the splint 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 prevent the nest box 1 from being transported with the conveying mechanism 2, the nest box fixed reversing mechanism 3 sucks the nest box 1 and lifts 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 fixed 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 have swapped positions, and the second box corner 12 becomes the film removal 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 work together to fix the nest box 1.

[0035] In step S3 , the nest box fixing and reversing mechanism 3 lowers the nest box 1 , which includes the following steps: the nest box 1 falls onto the conveying mechanism 2 , and the nest box fixing and reversing mechanism 3 continues to descend and separates from the nest box 1 , so that the nest box fixing and 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 fixing and reversing mechanism 3 is as follows: the nest box fixing and 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 vacuums the bottom of the nest box 1. After the nest box 1 is sucked by the nest box fixing and reversing mechanism 3, the lifting cylinder lifts the nest box 1. The nest box fixing and reversing mechanism 3 rotates the nest box 1 via the first rotating cylinder. The conveying mechanism 2 includes two side-by-side conveyor belts, and the suction cup 35, lifting cylinder, and first rotating cylinder are all located between the two conveyor belts.

[0038] One embodiment of the clamping plate 32 and the baffle 31 securing the nest box 1 is as follows: a second rotary cylinder 33 is connected to the lower end of the baffle 31, and the baffle 31 rotates to open and close the nest box 1. A third rotary cylinder 34 is connected to the lower end of the clamping plate 32, and the clamping plate 32 rotates to open and close the nest box 1. In this embodiment, opening the nest box 1 is to release the restrictions on the nest box 1, and closing the nest box 1 is to restrict the nest box 1.

[0039] One embodiment of the clamping plate 32 and the baffle 31 fixing the nest box 1 is as follows: the clamping plate 32 and the baffle 31 are each provided with a limiting groove 100 adapted to the corner of the nest box 1. The limiting groove 100 can limit the two side edges of the nest box 1. The four limiting grooves 100 limit the four corners of the nest box 1, thereby fixing the nest box 1.

[0040] One embodiment of positioning the nest box 1 is as follows: the nest box fixing and reversing mechanism 3 includes two adjustable rails. When the nest box 1 is conveyed between the two rails along the length of the conveyor 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 conveyor mechanism 2. The two rails complete the positioning of the nest box 1 in the width direction of the conveyor 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 conveyor mechanism 2. This ensures that the relative position of the nest box 1 and the nest box fixing and reversing mechanism 3 is fixed during reversal, thereby ensuring that the position of the second box corner 12 and the first box corner 11 are not offset when the second box corner 12 is swapped with the first box corner 11.

[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 1In step S2, if the film tearing fails, the screen will display three options: "Film Tear Successfully", "Film Tear and Reject", and "Second Film Tear". If the "Film Tear Successfully" option is selected, the nest box 1 will be output to the next workstation for work. If the "Film Tear and Reject" option is selected, the nest box 1 will flow into the reject station. If the "Second Film Tear" option is selected, the process will proceed to step S3. After step S3 is completed, if the film tearing detection sensor 6 still detects that the film tearing has failed, only the "Film Tear Successfully" and "Film Tear and Reject" options will be displayed on the screen. If the "Film Tear Successfully" option is selected, the nest box 1 will be output to the next workstation for work. If the "Film Tear and Reject" option is selected, the nest box 1 will flow into the reject 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, making it difficult for the film remover to pinch 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 various 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 further 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: opening the clamping plate (32), the nest box fixing reversing mechanism (3) sucks the nest box (1) and lifts up the nest box (1), opening the baffle (31), and the nest box fixing reversing mechanism (3) rotates the nest box (1) 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. 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), comprising 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) tears the film, 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 and 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 sucks the bottom of the nest box (1) by vacuuming. The nest box fixing and reversing mechanism (3) sucks the nest box (1) and then lifts the nest box (1) by the lifting cylinder. The nest box fixing and reversing mechanism (3) 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 clamping plate (32) is connected to a third rotary cylinder (34), and the clamping plate (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 (31) are both provided with limiting grooves (100) adapted to the corners of the nest box (1), and the limiting grooves (100) can limit the two side edges of the nest box (1).

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