Boxed PVDC preservative film tearing detection device

Abstract

The utility model relates to the field of film detection technique, concretely is a kind of box PVDC preservative film tear film detection device, it can conveniently detect the force required for tearing film, it includes base, detection device and turnover device are installed on the base, the detection device includes detection table, force value detector is installed on the detection table, the detection head of tension detector is connected film clamping mechanism, the turnover device includes the support frame being set to the both sides of the base, turnover frame is set between two support frames by pivot, pivot one end penetrates the support frame of one side and connects pneumatic actuator, box fixing mechanism is installed on the turnover frame.

Description

Technical Field

[0001] This utility model relates to the field of membrane testing technology, specifically a device for detecting the tearing of boxed PVDC food preservation film. Background Technology

[0002] Plastic wrap is a commonly used product in daily life. Most plastic wrap is separated by perforated lines; to use it, simply tear along the perforated lines. Boxed PVDC plastic wrap boasts superior transparency, a good surface gloss, and excellent self-adhesion. Since it's a single sheet, you first pull out the required length of film, then use a cutter to tear it. The ease and reliability of tearing the film is a key factor in consumer evaluation of product quality. Currently, there is no effective way to test the force required to tear the film. Summary of the Invention

[0003] To solve the above-mentioned technical problems, this utility model provides a PVDC cling film tear detection device, which can conveniently detect the force required to tear the film.

[0004] The technical solution is as follows: A PVDC sealing film tear detection device, characterized in that it includes a base, on which a detection device and a flipping device are installed. The detection device includes a detection platform, on which a tensile tester is installed. The detection head of the tensile tester is connected to a film clamping mechanism. The flipping device includes support frames disposed on both sides of the base. A flipping frame is disposed between the two support frames via a rotating shaft. One end of the rotating shaft passes through one of the support frames and is connected to a pneumatic actuator. A box-fixing mechanism is installed on the flipping frame.

[0005] A further feature is that the clamping mechanism includes a lower fixed block and an upper movable block, the lower fixed block is connected to the detection head, the upper movable block is placed on the lower fixed block and is equipped with a locking bolt, the bottom of the locking bolt passes through the lower fixed block, a spring is fitted on the locking bolt located between the lower fixed block and the upper movable block, and clamping pads are provided on both the lower fixed block and the upper movable block; A slider is installed at the bottom of the testing platform, and the slider is slidably connected to the guide rod on the base. A transmission block is provided on one side of the testing platform, and the transmission block is connected to the lead screw mechanism. The flipping frame is open on the side facing the detection device and at the top. The box fixing mechanism is located on the side away from the detection device and includes a fixing base. A flipping pressing block is installed on the fixing base through a first pin and a flipping locking block is installed through a second pin. After the flipping pressing block flips and presses against the plastic wrap box, the flipping locking block presses against the flipping pressing block to achieve locking. The front end of the flipping block is equipped with a longitudinal pressing plate.

[0006] With this invention, the boxed cling film is placed on the flipping frame and fixed with the opening facing the detection device. A section of cling film is pulled out and clamped by the film clamping mechanism. The flipping frame is flipped downwards, and the film is cut using the cutter on the box. At the same time, the tensile strength detector detects the tensile force on the cling film when it is cut, thereby realizing the detection of the tearing force. Attached Figure Description

[0007] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the membrane clamping mechanism; Figure 3 This is a schematic diagram of longitudinal tablet compression. Detailed Implementation

[0008] See Figures 1 to 3 As shown, a PVDC sealing film tear detection device includes a base 1, on which a detection device and a flipping device are installed. The detection device includes a detection platform 2, on which a tensile tester 3 is installed. A slider is installed at the bottom of the detection platform 2, and the slider is slidably connected to a guide rod 4 on the base 1. A transmission block 5 is provided on one side of the detection platform 2, and the transmission block 5 is connected to a lead screw mechanism. The lead screw mechanism includes a lead screw 6, a transmission rod 7, and a knob 8. Turning the knob 8 causes the lead screw 6 to rotate through the transmission rod 7, and the detection platform 2 moves under the drive of the transmission block 5, thereby completing the position adjustment of the tensile tester 3.

[0009] The testing head of the tensile testing instrument 3 is connected to the film clamping mechanism 9. The film clamping mechanism 9 includes a lower fixed block 9-1 and an upper movable block 9-2. The lower fixed block 9-1 is connected to the testing head. The upper movable block 9-2 is placed on the lower fixed block 9-1 and is equipped with a locking bolt 9-3. The bottom of the locking bolt 9-3 passes through the lower fixed block 9-1. A spring 9-4 is fitted on the locking bolt 9-3 located between the lower fixed block 9-1 and the upper movable block 9-2. Clamping shims 9-5 are provided on both the lower fixed block 9-1 and the upper movable block 9-2. The distance between the lower fixed block 9-1 and the upper movable block 9-2 can be adjusted by adjusting the locking bolt 9-3, thereby clamping the plastic wrap.

[0010] The flipping device includes support frames 10 disposed on both sides of the base. A flipping frame 12 is disposed between the two support frames 10 via a rotating shaft 11. One end of the rotating shaft 11 passes through one of the support frames 10 and is connected to a pneumatic actuator 13. In this embodiment, the pneumatic actuator 13 controls the flipping frame 12 to rotate 90°. The flipping frame 12 has openings on the side facing the detection device and at the top for easy insertion. A box-shaped fixing mechanism is disposed on the flipping frame 12 on the side away from the detection device, including a fixing base 14. A first pin 15 is mounted on the fixing base 14. The flipping pressure block 16 is mounted with a flipping locking block 17 via a second pin. The flipping locking block 17 can flip within a slot on the fixed base 14, and the width of the flipping locking block 17 is the same as the width of the slot. After the flipping pressure block 16 flips and presses down on the plastic wrap box, the flipping locking block 17 presses down on the flipping pressure block 16 to achieve locking. At this time, external force is required to flip the locking block 17 open to ensure that the plastic wrap box is reliably pressed. A longitudinal pressure plate 18 is installed at the front end of the flipping pressure block 16, which can be used to simulate the thumb of a human hand pressing down on the middle position of the front end of the plastic wrap box. In the figure, 19 is the control valve that controls the pneumatic actuator 13.

[0011] During testing, the plastic wrap box is opened with the opening facing the testing structure and placed on the flipping frame 12. The flipping pressure block 16 is flipped and pressed onto the plastic wrap box, and then the flipping locking block 17 is pressed onto the flipping pressure block 16 to complete the fixation. Then, a section of plastic wrap is pulled out from the opening of the plastic wrap box and sandwiched between the lower fixed block 9-1 and the upper movable block 9-2. Then, the pneumatic actuator 13 is activated, and the flipping frame 12 flips down 90° along with the plastic wrap box. Since the plastic wrap is sandwiched, the plastic wrap can be cut with the cutter on the plastic wrap box during the flipping, simulating the action of manually tearing the film. During the whole process, the plastic wrap will be subjected to a tensile force, which can be detected by the tensile force detector 3. This force is the force required when holding one end of the plastic wrap when tearing the film.

Claims

1. A device for detecting the tearing of boxed PVDC food preservation film, characterized in that, It includes a base, on which a detection device and a flipping device are mounted. The detection device includes a detection platform, on which a tensile tester is mounted. The detection head of the tensile tester is connected to a film clamping mechanism. The flipping device includes support frames disposed on both sides of the base. A flipping frame is disposed between the two support frames via a rotating shaft. One end of the rotating shaft passes through one of the support frames and is connected to a pneumatic actuator. A box-shaped fixing mechanism is mounted on the flipping frame.

2. The boxed PVDC food preservation film tear detection device according to claim 1, characterized in that, The film clamping mechanism includes a lower fixed block and an upper movable block. The lower fixed block is connected to the detection head. The upper movable block is placed on the lower fixed block and is equipped with a locking bolt. The bottom of the locking bolt passes through the lower fixed block. A spring is fitted on the locking bolt located between the lower fixed block and the upper movable block.

3. The boxed PVDC food preservation film tear detection device according to claim 2, characterized in that, Both the lower fixed block and the upper movable block are equipped with clamping pads.

4. The boxed PVDC food preservation film tear detection device according to claim 1, characterized in that, A slider is installed at the bottom of the testing platform, and the slider is slidably connected to the guide rod on the base. A transmission block is provided on one side of the testing platform, and the transmission block is connected to the lead screw mechanism.

5. The boxed PVDC food preservation film tear detection device according to claim 1, characterized in that, The flipping frame is open on the side facing the detection device and at the top. The box fixing mechanism is located on the side away from the detection device and includes a fixing base. A flipping pressing block is installed on the fixing base through a first pin and a flipping locking block is installed through a second pin. After the flipping pressing block flips and presses down on the plastic wrap box, the flipping locking block presses down on the flipping pressing block to achieve locking.

6. The boxed PVDC food preservation film tear detection device according to claim 5, characterized in that, The front end of the flipping block is equipped with a longitudinal pressing plate.

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