Air tightness automatic detection device for heat sealing line positions of four layers of films of M-shaped film bag

Abstract

An air tightness automatic detection device for heat sealing line positions of four layers of films of an M-shaped film bag comprises a conveyor, a detection support is arranged at the upper end of the conveyor, two sets of rodless cylinders are symmetrically arranged at the left end and the right end of the detection support, linear guide rails are arranged below the rodless cylinders, a connecting base is arranged on a rear sliding base of each rodless cylinder, and the rear end of each connecting base is connected with a rear detection mechanism. The rear detection mechanism comprises a detection support, the detection support is connected with a cylinder body of a finger pushing air cylinder, a cylinder rod of the finger pushing air cylinder is connected with a detection finger, an air outlet hole is formed in the front end of the detection finger, an inner cavity of the detection finger is connected with a positive pressure switch, and a finger return sensor is further arranged on the detection support. And the air tightness of the heat sealing line of the four-layer film is judged by detecting positive pressure signal output during the period when the finger is withdrawn to the period when the finger return sensor sends out the signal. According to the utility model, the conveyor and the finger detection mechanism are controlled by the control system, so that the air tightness of the four-layer film heat sealing line position is automatically detected under the condition that normal conveying of the M-shaped film bag is not influenced.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of M-shaped film bag four-layer film heat-seal line position's air tightness automatic detection device, belong to packaging machinery field. BACKGROUND

[0002] M-shaped cylindrical film bottom heat-seal and cut complete bag making, bag making is carried out after packing, M-shaped bag mouth is heat-sealed after packing completion, and M-shaped film bag after sealing is completed, as shown in figure;In actual production, because M-shaped film bag exists inner fold edge, make its inner fold edge place exist the possibility of air leakage when heat-sealing, for the M-shaped film bag with air leakage phenomenon can produce leakage, impurity enters material bag and affects material quality and causes pollution to environment etc. Figure 2 Problem;Therefore, M-shaped film bag with air leakage problem cannot carry out subsequent process, and it needs to be rejected offline, and currently all adopt artificial sampling bag mouth heat-seal line to confirm whether air tightness is qualified, without automatic detection technical scheme. CONTENT OF UTILITY MODEL

[0003] In order to detect whether four-layer film heat-seal line position of M-shaped film bag after sealing exists air leakage problem, the present application provides a kind of M-shaped film bag four-layer film heat-seal line position's air tightness automatic detection device, it includes conveyer, and the running speed of conveyer is controlled by control system, and the upper end of conveyer is equipped with detection support, and two groups of longitudinal horizontal arrangement's rodless air cylinder are symmetrically arranged in the left and right ends of detection support, and the bidirectional intake pressure of rodless air cylinder is adjustable, and the lower of rodless air cylinder is equipped with longitudinal horizontal arrangement straight line guide rail, and the slide seat of rodless air cylinder is equipped with connecting seat, and the rear end of connecting seat is connected with rear detection mechanism, and rear detection mechanism includes detection support, and the rear sliding block of straight line guide rail is connected with detection support, and the cylinder body of push finger air cylinder is also connected with detection support, and the rear end of cylinder rod of push finger air cylinder is connected with detection finger, and the rear end of detection finger is also connected with transverse horizontal arrangement finger transfer guide rail, and the slide seat of finger transfer guide rail is connected on detection support, and the front end of detection finger is equipped with air outlet hole, and the internal cavity of detection finger is connected with positive pressure switch, and detection support is also equipped with finger reset sensor, and push finger air cylinder drives detection finger to slide along finger transfer guide rail and insert into the bag corner inside M-shaped film bag, and four-layer film heat-seal line place blocks air outlet hole, and compressed air is introduced into the internal cavity of detection finger and is sprayed outward through air outlet hole, and control system continuously detects the output signal of positive pressure switch, until detection finger is withdrawn outward to the signal of finger reset sensor, and control system judges the air tightness of four-layer film heat-seal line place by the output signal of positive pressure switch.

[0004] The front end of connecting seat is equipped with longitudinal horizontal arrangement tensioning air cylinder, and the cylinder rod of tensioning air cylinder is connected on front detection mechanism, and front detection mechanism and rear detection mechanism are same in structure, and the front sliding block of straight line guide rail is connected with the detection support of front detection mechanism, and control system can separately control front detection mechanism and rear detection mechanism step action or synchronous action.

[0005] The rear end of the connecting seat is provided with a longitudinal and horizontal adjusting rod, and the connecting seat is connected with the rear detection mechanism through the adjusting rod.

[0006] Two groups of longitudinal guide plates are symmetrically arranged on the left and right sides above the conveyor, the guide plates are connected to the detection bracket, and a finger avoiding groove is arranged in the middle of the guide plate.

[0007] The beneficial effects of the utility model are:

[0008] A. The control system is used for controlling the conveyor and the rear detection mechanism to coordinate, so that the air tightness of the four-layer film heat sealing line of the M-shaped film bag can be detected without affecting normal conveying, the adverse effects caused by poor sealing during packaging are reduced, the rear detection mechanism is inserted into the bag corner of the M-shaped film bag, the forward movement of the rear detection mechanism is driven by the forward conveying of the M-shaped film bag, the air outlet hole can be always blocked at the four-layer film heat sealing line, and therefore the reliability of the air tightness automatic detection is ensured.

[0009] B. The two-way air inlet pressure of the rodless cylinder can be adjusted, the output of the rodless cylinder is small during forward movement, and is only used for following the rear detection mechanism, the air outlet hole of the M-shaped film bag A is always blocked at the four-layer film heat sealing line during the forward movement of the rear detection mechanism, and the reliability of the air tightness automatic detection is further improved; and the output of the rodless cylinder is large during backward movement, the detection mechanism can be quickly moved back, and the working efficiency of the air tightness automatic detection is improved.

[0010] C. The control system is used for realizing separate control of the front detection mechanism and the rear detection mechanism, so that the state that the four detection mechanisms are inserted into the bag corner of the M-shaped film bag can be more accurately controlled, the supporting cylinder can ensure that the four detection fingers are respectively supported at the four-layer film heat sealing lines of the bottom seal and the mouth seal after being inserted into the bag corner of the M-shaped film bag, and the reliability of the synchronous air tightness detection of the front detection mechanism and the rear detection mechanism is further improved.

[0011] D. The adjusting rod is used for adjusting the distance between the front detection mechanism and the rear detection mechanism, so that the air tightness automatic detection of different specifications of M-shaped film bags is adapted, and the practicability of the detection device is improved.

[0012] E. The guide plate can avoid the deviation of the M-shaped film bag entering the conveyor, and can also ensure that the M-shaped film bag does not deviate when the detection finger is withdrawn from the bag mouth, thereby providing reliability guarantee for the next process. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is a three-dimensional axonometric view of the utility model.

[0014] Figure 2 is a structural schematic diagram of the M-shaped film bag.

[0015] Figure 3 is a structural schematic diagram of the rear detection mechanism.

[0016] Figure 4 is a state schematic diagram of the rear detection mechanism inserted into the four-layer film heat sealing line of the M-shaped film bag.

[0017] Figure 5 is a state schematic diagram of the air tightness detection of the M-shaped film bag. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical scheme and beneficial effects of the utility model clearer, the embodiments of the utility model are described in detail below with reference to the drawings, the embodiments are exemplary and are intended to explain the utility model, and cannot be understood as limiting the utility model.

[0019] Referring to Figures 1-3 , an air tightness automatic detection device for the four-layer film heat sealing line position of an M-shaped film bag, comprising a conveyor 1, the conveyor 1 is controlled by a control system to control its running speed, a detection support 2 is arranged at the upper end of the conveyor 1, two groups of rodless air cylinders 3 are symmetrically arranged at the left and right ends of the detection support 2 and are arranged in a longitudinal and horizontal manner, the bidirectional air inlet pressure of the rodless air cylinder 3 is adjustable, a longitudinal and horizontal linear guide rail 4 is arranged below the rodless air cylinder 3, a connecting seat 7 is arranged on the sliding seat of the rodless air cylinder 3, the rear end of the connecting seat 7 is connected with a rear detection mechanism 9, the rear detection mechanism 9 comprises a detection support 91, the detection support 91 is connected with the rear sliding block of the linear guide rail 4, the detection support 91 is also connected with the cylinder body of a push finger air cylinder 92, the cylinder rod of the push finger air cylinder 92 is connected with the rear end of a detection finger 94, the rear end of the detection finger 94 is also connected with a horizontally arranged finger moving guide rail 97, the sliding seat of the finger moving guide rail 97 is connected on the detection support 91, the front end of the detection finger 94 is provided with an air outlet hole 95, the inner cavity of the detection finger 94 is connected with a positive pressure switch 96, the detection support 91 is also provided with a finger back position sensor 93, the push finger air cylinder 92 drives the detection finger 94 to slide along the finger moving guide rail 97 and insert into the bag corner of the M-shaped film bag A, the air outlet hole 95 is blocked at the four-layer film heat sealing line, compressed air is introduced into the inner cavity of the detection finger 94 and is sprayed outwards through the air outlet hole 95, the control system continuously detects the output signal of the positive pressure switch 96, until the detection finger 94 is withdrawn outwards to the finger back position sensor 93 to send a signal, the control system judges the air tightness at the four-layer film heat sealing line through the output signal of the positive pressure switch 96.

[0020] Further, the front end of the connecting seat 7 is provided with a longitudinal horizontal arrangement of the tension cylinder 6, the cylinder rod of which is connected to the front detection mechanism 5, which is the same structure as the rear detection mechanism 9, and the detection support of the front detection mechanism 5 is connected to the front slider of the linear guide rail 4. The control system can separately control the step action or synchronous action of the front detection mechanism 5 and the rear detection mechanism 9.

[0021] Further, the rear end of the connecting seat 7 is provided with a longitudinal horizontal arrangement of the adjusting rod 8, and the connecting seat 7 is connected to the rear detection mechanism 9 through the adjusting rod 8.

[0022] Further, two groups of longitudinal arrangement of the guide plates 10 are symmetrically provided on the left and right sides above the conveyor 1, which are connected to the detection support 2, and the middle part of the guide plate 10 is provided with a finger avoiding slot.

[0023] Referring to Figures 1-5 , the working principle of the embodiment is as follows:

[0024] After the M-shaped film bag A is heat sealed, it enters the started conveyor 1 and horizontally extends to be inserted into the left and right bag corner of the four-layer film of the M-shaped bag A;

[0025] The forward conveying of the M-shaped film bag A drives the forward movement of the rear detection mechanism 9. When the rodless cylinder 3 moves forward, the output is small and follows the forward movement of the rear detection mechanism 9. At this time, the detection fingers 94 horizontally extend to be inserted into the left and right bottom bag corner of the four-layer film of the M-shaped film bag A, and at the same time, the tension cylinder 6 drives the forward movement of the front detection mechanism 5, so that the front detection fingers are located at the bottom sealing heat sealing line B to block the air outlet hole, and the rear detection fingers 94 are located at the mouth sealing heat sealing line C to block the air outlet hole 95;

[0026] The compressed air is introduced into the inner cavity of the four groups of detection fingers 94 and sprayed outward through the air outlet hole to detect the air pressure. If at least one positive pressure switch 96 detects no positive pressure signal output, the control system judges that the M-shaped film bag A has poor air tightness, and the four groups of detection fingers 94 are withdrawn outward to the reset position. The M-shaped film bag A enters the next process.

[0027] If all four positive pressure switches 96 have positive pressure output signals, the control system continuously detects the output signals of the positive pressure switches 96 during the period when the four groups of detection fingers 94 are withdrawn outward to the finger reset sensor 93 sends a signal: if there is always a positive pressure output signal during the withdrawal of the detection fingers 94, it is judged that the M-shaped film bag A has good air tightness; if there is no positive pressure signal output during the withdrawal of the detection fingers 94, it means that there is air leakage at the heat sealing line, and it is judged that the M-shaped film bag A has poor air tightness; finally, according to the judgment result, the M-shaped film bag A with good air tightness enters the next process, and the M-shaped film bag A with poor air tightness enters the offline process; after the detection is completed, the rodless cylinder 3 drives the rearward movement of the front detection mechanism 5 and the rear detection mechanism 9 to the initial position.

Claims

1. A kind of M-shaped film bag four-layer film heat seal line position automatic detection device of air tightness, it includes conveyor (1), conveyor (1) is controlled by control system and its running speed is controlled, it is characterized by: The upper end of the conveyor (1) is provided with a first detection support (2), and two groups of longitudinal and horizontal arrangement rodless air cylinders (3) are symmetrically arranged at the left and right ends of the first detection support (2); the bidirectional air inlet pressure of the rodless air cylinder (3) is adjustable; a longitudinal and horizontal arrangement linear guide rail (4) is arranged below the rodless air cylinder (3); a connecting seat (7) is arranged on the sliding seat of the rodless air cylinder (3); the rear end of the connecting seat (7) is connected with a rear detection mechanism (9); the rear detection mechanism (9) comprises a detection support (91); the detection support (91) is connected with a rear sliding block of the linear guide rail (4); the detection support (91) is also connected with a cylinder body of a push-finger air cylinder (92); a cylinder rod of the push-finger air cylinder (92) is connected with the rear end of a detection finger (94); the rear end of the detection finger (94) is also connected with a transverse and horizontal arrangement finger moving guide rail (97); a sliding seat of the finger moving guide rail (97) is connected on the detection support (91); the front end of the detection finger (94) is provided with an air outlet hole (95); an inner cavity of the detection finger (94) is connected with a positive pressure switch (96); the detection support (91) is also provided with a finger back position sensor (93); the push-finger air cylinder (92) drives the detection finger (94) to slide along the finger moving guide rail (97) and insert into the bag corner of the M-shaped film bag (A); the air outlet hole (95) is blocked by the four-layer film heat sealing line; compressed air is introduced into the inner cavity of the detection finger (94) and sprayed outward through the air outlet hole (95); the control system continuously detects the output signal of the positive pressure switch (96); until the detection finger (94) is withdrawn outward to the finger back position sensor (93) to send a signal, the control system judges the air tightness of the four-layer film heat sealing line through the output signal of the positive pressure switch (96).

2. The automatic detection device for the hermeticity of the heat-seal line position of the M-shaped film bag four-layer film according to claim 1, characterized in that: The front end of the connecting seat (7) is provided with a longitudinal and horizontal arrangement tension air cylinder (6); a cylinder rod of the tension air cylinder (6) is connected on a front detection mechanism (5); the front detection mechanism (5) has the same structure as the rear detection mechanism (9); a detection support of the front detection mechanism (5) is connected with a front sliding block of the linear guide rail (4); the control system can separately control the step-by-step action or the synchronous action of the front detection mechanism (5) and the rear detection mechanism (9).

3. The apparatus for automatic detection of the hermeticity of the heat-seal line position of the M-shaped film bag four-layer film according to claim 2, characterized in that: The rear end of the connecting seat (7) is provided with a longitudinal and horizontal arrangement adjusting rod (8); the connecting seat (7) is connected with the rear detection mechanism (9) through the adjusting rod (8).

4. The apparatus for automatic detection of the hermeticity of the heat-seal line position of the M-shaped film bag four-layer film according to claim 1, characterized in that: The upper left and right sides of the conveyor (1) are symmetrically provided with two groups of longitudinal arrangement guide plates (10); the guide plates (10) are connected on the first detection support (2); the middle part of the guide plate (10) is provided with a finger avoiding groove.

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