POF shrink film tension testing device for food packaging

Abstract

The utility model relates to the technical field of tension testing devices, in particular to a POF shrink film tension testing device for food packaging, which comprises a base, a control mechanism, a driving mechanism and a clamping mechanism, the control mechanism, the driving mechanism and the clamping mechanism are mounted on the base, a pressing mechanism is mounted on the base and comprises a fixing plate, sampling mechanisms are arranged on the two pressing plates, and the clamping mechanism is arranged on the fixing plate. The sampling mechanism comprises two sliding blocks, the two pressing plates are slidably connected with the sliding blocks, the interiors of the two pressing plates are slidably connected with limiting blocks, the bottoms of the sliding blocks are fixedly connected with inserting plates, limiting openings are formed in the limiting blocks, the inserting plates are inserted into the limiting openings, second springs are clamped between the sliding blocks and the limiting blocks, and the second springs are fixedly connected with the sliding blocks. A sliding rail is fixedly connected between the two opposite sliding blocks, a blade is slidably connected to the sliding rail, a plurality of cutting grooves are formed in the fixing plate at equal intervals, a shrink film cutting mechanism is arranged, sampling of the shrink film is facilitated, and the testing accuracy is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to a tension testing device, concretely to a POF shrink film tension testing device for food packaging belongs to tension testing device technical field. BACKGROUND

[0002] POF is full name multilayer co-extrusion polyolefin heat shrinkable film, it is linear low density polyethylene as middle layer, copolymerization propylene as inside and outside layer, through five extruders plasticizing extrusion, again special process processing such as die forming, film bubble inflation, it is the POF shrink film tension testing machine working principle based on mechanics principle and electronic measurement technology, in the testing process, testing machine passes through the relative movement of control clamp, applies the tensile force to POF shrink film sample, simultaneously, utilize the force value sensor on movable chuck and machine built-in displacement sensor, real time acquisition force value change and displacement change in the testing process, these data are used to calculate the tensile strength of material, breaking elongation and so on key performance index.

[0003] The current POF shrink film for food packaging is directly clamped at both ends of the shrink film on the fixture when tested by the tension testing machine, one fixture is fixed, and the other fixture is raised for tension testing. Before testing, the shrink film needs to be cut into the required width. The tension testing machine does not have a cutting assembly. When sampling the shrink film, the shrink film is usually laid on the desktop and cut by a blade. The cutting is not neat, which can cause uneven stress and wrinkles of the shrink film during cutting, resulting in errors in the test results. UTILITY MODEL CONTENT

[0004] The utility model aims at solving the above-mentioned problems and provides a POF shrink film tension testing device for food packaging. The cutting mechanism of the shrink film is provided, which facilitates sampling of the shrink film and ensures the accuracy of the test.

[0005] The utility model discloses a POF shrink film tension testing device for food packaging through the following technical scheme to realize above -mentioned purpose, including base, control mechanism, drive mechanism and clamping mechanism of installation on base, install pressing mechanism on the base, the pressing mechanism includes fixed plate, the side of base is equipped with fixed plate, the bottom of fixed plate is rectangular array and fixes four bottom shells, four slide columns that are located above bottom shell are connected on the fixed plate and slide, and the first spring is clamped between slide column and bottom shell, and the slide column of same side is all fixedly connected with the pressing plate, and the opposite two pressing plates are fixedly connected with two connecting plates, and the sampling mechanism is equipped on two pressing plates, the sampling mechanism includes two sliding blocks, and the sliding block is slidably connected on two pressing plates, and the inside of two pressing plates is slidably connected with the limit block, the bottom of sliding block is fixedly connected with the plug-in board, the limit port is seted up on the limit block, the plug-in board inserts the inside of limit port, and the second spring is clamped between sliding block and limit block, and the opposite two sliding blocks are fixedly connected with the slide rail, and the slide rail is slidably connected with the blade, and a plurality of cutting grooves are equidistantly arranged on the fixed plate.

[0006] Preferably, the pressing mechanism further comprises a rubber pad, and the bottom of each of the two pressing plates is bonded with a rubber pad.

[0007] Preferably, the inside of the pressing plate is in a convex structure, and the two pressing plates and the two connecting plates are in a rectangular structure.

[0008] Preferably, the control mechanism comprises a controller, the controller is installed on the base, and a control switch and an emergency stop button are installed on the base.

[0009] Preferably, the drive mechanism comprises a housing, the housing is installed on the base, a motor is installed in the housing, the motor is electrically connected between the control switch and the emergency stop button, a screw rod that is rotatably connected to the bottom of the housing is installed at the output end of the motor, and a sliding plate that is slidably connected to the housing is threadedly connected to the screw rod.

[0010] Preferably, the drive mechanism further comprises two baffles, the baffles are installed between the top and the bottom of the housing and the sliding plate, and the baffles are flexible baffles.

[0011] Preferably, the clamping mechanism comprises a top plate, the top plate is fixedly connected to the side of the sliding plate, two support rods are fixedly connected to the top plate and the base in opposite, guide plates are fixedly connected to the opposite ends of the two support rods, screws are threadedly connected to the two guide plates, clamping plates are rotatably connected to the ends of the two screws, and the bottom of the clamping plate abuts against the top of the guide plate.

[0012] Preferably, the top plate is provided with a protection mechanism, the protection mechanism comprises a blocking shell, the blocking shell is slidably connected to the outside of the top plate, and a bolt is inserted between the blocking shell and the top plate.

[0013] The utility model discloses the beneficial effect is: when sampling, the big piece POF shrinkage film is passed through the bottom of two compression plates, POF shrinkage film is placed on the surface of fixed plate at this moment, and the first spring is contracted by pressing a connecting plate, and the compression plate moves to the direction of fixed plate, and POF shrinkage film is pressed by the compression plate, realizes the pressing fixed of POF shrinkage film and waits cutting, keeps the pressing of connecting plate, moves the slide rail to the most end of POF shrinkage film, according to the width of POF shrinkage film of need, moves two blades to the inside of specified cutting groove, and the blade is contacted with the end of POF shrinkage film, and repeatedly pressing slide rail can be started to realize the movement of slider to the inside of compression plate, and the second spring is contracted, and there is a buffering distance, and it is favorable to the next knife, and when POF shrinkage film is opened, slide rail can be pressed completely, and at this moment, the plug-in board is inserted into the limiting mouth on the limiting block, and slide rail is moved along the slide groove on the compression plate to realize the cutting of two blades to POF shrinkage film, and the blade moves in the cutting groove, realizes the sampling of the POF shrinkage film of quick detection, guarantees the neatness of sample, avoids the wrinkle, and improves the accuracy of detection. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is whole structure schematic diagram of the utility model;

[0015] Figure 2 It is connecting structure schematic diagram of the shell and base of the utility model;

[0016] Figure 3 It is connecting structure schematic diagram of the support rod and guide plate of the utility model;

[0017] Figure 4 It is connecting structure schematic diagram of the top plate, blocking shell and bolt of the utility model;

[0018] Figure 5 It is connecting structure schematic diagram of the fixed plate, compression plate and connecting plate of the utility model;

[0019] Figure 6 It is connecting structure schematic diagram of the fixed plate, bottom shell and first spring of the utility model;

[0020] Figure 7 It is connecting structure schematic diagram of the fixed plate and cutting groove of the utility model;

[0021] Figure 8 It is connecting structure schematic diagram of the slider, limiting block and plug-in board of the utility model.

[0022] In the figure: 1, base; 2, control mechanism; 201, controller; 202, control switch; 203, emergency stop button; 3, driving mechanism; 301, shell; 302, baffle; 303, motor; 304, screw rod; 305, sliding plate; 4, clamping mechanism; 401, support rod; 402, top plate; 403, guide plate; 404, clamping plate; 405, screw rod; 5, protection mechanism; 501, blocking shell; 502, bolt; 6, pressing mechanism; 601, fixed plate; 602, pressing plate; 603, connecting plate; 604, sliding column; 605, bottom shell; 606, rubber pad; 607, first spring; 7, sampling mechanism; 701, sliding block; 702, sliding rail; 703, cutting groove; 704, blade; 705, limiting block; 706, second spring; 707, limiting port; 708, plug plate. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0024] Please refer to Figures 1-8 As shown in the figure, a kind of POF shrink film tension testing device for food packaging, including base 1, control mechanism 2, driving mechanism 3 and clamping mechanism 4 installed on base 1, the base 1 is installed with pressing mechanism 6, the pressing mechanism 6 includes fixed plate 601, the side of the base 1 is installed with fixed plate 601, the bottom of the fixed plate 601 is rectangular array fixed four bottom shells 605, four sliding columns 604 above bottom shell 605 are slidably connected on the fixed plate 601, first spring 607 is clamped between the sliding column 604 and bottom shell 605, two sliding columns 604 on the same side are fixedly connected with pressing plate 602, two connecting plates 603 are fixedly connected between opposite two pressing plates 602, sampling mechanism 7 is arranged on two pressing plates 602, the sampling mechanism 7 includes two sliding blocks 701, sliding block 701 is slidably connected on two pressing plates 602, limiting block 705 is slidably connected in the interior of two pressing plates 602, plug plate 708 is fixedly connected to the bottom of sliding block 701, limiting port 707 is formed in limiting block 705, plug plate 708 is inserted into limiting port 707, second spring 706 is clamped between sliding block 701 and limiting block 705, sliding rail 702 is fixedly connected between opposite two sliding blocks 701, blade 704 is slidably connected on sliding rail 702, a plurality of cutting grooves 703 are equidistantly arranged on fixed plate 601.

[0025] As a technical optimization scheme of the utility model, the pressing mechanism 6 further includes rubber pads 606, the bottom of each of the two pressing plates 602 is bonded with a rubber pad 606, and the pressing effect of the pressing plate 602 on the shrink film is improved.

[0026] As a technical optimization scheme of the utility model, the inside of the pressing plate 602 is in a convex structure, and the two pressing plates 602 and the two connecting plates 603 are in a rectangular structure, so that pressing one connecting plate 603 can simultaneously press the two pressing plates 602, and the two sides of the shrink film can be quickly pressed.

[0027] As a technical optimization scheme of the utility model, the control mechanism 2 includes a controller 201, the base 1 is installed with the controller 201, the base 1 is installed with a control switch 202 and an emergency stop button 203, the driving mechanism 3 includes a shell 301, the base 1 is installed with the shell 301, the inside of the shell 301 is installed with a motor 303, the motor 303 is electrically connected between the control switch 202 and the emergency stop button 203, the output end of the motor 303 is installed with a screw rod 304 which is rotationally connected with the bottom of the shell 301, the screw rod 304 is threadedly connected with a sliding plate 305 which is slidingly connected with the shell 301, the driving mechanism 3 further includes two baffles 302, the shell 301 and the top and bottom of the sliding plate 305 are both installed with a baffle 302, the baffle 302 is a flexible baffle, the clamping mechanism 4 includes a top plate 402, the side surface of the sliding plate 305 is fixedly connected with the top plate 402, the top plate 402 and the base 1 are oppositely fixedly connected with two support rods 401, the opposite ends of the two support rods 401 are both fixedly connected with a guide plate 403, the two guide plates 403 are both threadedly connected with a lead screw 405, the end of each of the two lead screws 405 is rotationally provided with a clamping plate 404, and the bottom of the clamping plate 404 is in abutment with the top of the guide plate 403; starting the motor 303 can drive the screw rod 304 to lift the sliding plate 305, so that the shrink film between the clamping plate 404 and the guide plate 403 is pulled apart for tension test.

[0028] As a technical optimization scheme of the utility model, the top plate 402 is provided with a protection mechanism 5, the protection mechanism 5 includes a blocking shell 501, the outside of the top plate 402 is slidingly connected with the blocking shell 501, the blocking shell 501 and the top plate 402 are inserted with a latch 502, the latch 502 can be pulled out during testing, so that the blocking shell 501 falls to the desktop, and then with the lifting of the sliding plate 305, the blocking shell 501 can always protect the shrink film, avoiding the tester from being injured due to pulling off.

[0029] The utility model discloses a first spring 607 is realized the contraction when the first spring 607 is realized the contraction, and the fixed plate 601 is moved to the direction of pressing plate 602, and the POF shrinkage film is pressed by the rubber pad 606 of pressing plate 602 bottom, realizes the pressing fixation of POF shrinkage film and waits cutting, keeps the pressing of connecting plate 603, further moves slide rail 702 to the most end of POF shrinkage film, according to the width of POF shrinkage film of need, moves two blades 704 to the inside of specified cutting groove 703, and the blade 704 is contacted with the end of POF shrinkage film, and then the slide rail 702 can be repeatedly pressed to realize the inside movement of sliding block 701 to pressing plate 602, and the second spring 706 is contracted, and there is a buffer distance, and the next knife is beneficial, when the POF shrinkage film is opened, the slide rail 702 can be pressed completely, and the plug-in board 708 is inserted into the limiting mouth 707 on the limiting block 705, and the slide rail 702 is moved along the sliding slot on the pressing plate 602 to realize the cutting of two blades 704 to POF shrinkage film, and the blade 704 moves in the cutting groove 703, realizes the sampling of the POF shrinkage film of quick detection, guarantees the neatness of sample, avoids the wrinkle, improves the accuracy of detection, then, the both ends of POF shrinkage film sample are respectively clamped between two clamping plates 404 and guide plate 403, and the motor 303 is started to realize the lifting of slide plate 305 driven by screw rod 304, and then the POF shrinkage film is pulled apart, and when the POF shrinkage film is broken, the test is completed, and the test result can be observed through controller 201, and when the slide plate 305 is lifted, the bolt 502 is pulled out to realize the descent of the blocking shell 501, so the slide plate 305 moves in the inside of blocking shell 501, avoids the POF shrinkage film of breaking to hurt, and the POF shrinkage film can be taken out from between guide plate 403 and clamping plate 404 by rotating screw rod 405 when the test is completed.

[0030] It will be apparent to those skilled in the art that the utility model is not limited to the details of the above-exemplified embodiments, but that the utility model can be implemented in other concrete forms without departing from the spirit or essential characteristics of the utility model. Thus, the embodiments should be considered in all respects as illustrative and not restrictive, the scope of the utility model being defined by the appended claims rather than the above description, and it is intended to be encompassing of all changes and modifications that fall within the meaning and scope of equivalents of the claims. Any reference signs in the claims should not be construed as limiting the claims to the figures in which the reference signs are used.

[0031] Furthermore, it should be understood that although the specification is described in terms of embodiments, not every embodiment includes every feature or implementation described herein. The specification can include implicit combinations of explicitly mentioned features and / or implicit combinations of implicitly mentioned features. Such combinations are also expressly included within the scope of the specification and an embodiment.

Claims

1. A POF shrink film tensile testing device for food packaging, comprising a base (1), a control mechanism (2) mounted on the base (1), a driving mechanism (3) and a clamping mechanism (4), characterized in that: The base (1) is provided with a pressing mechanism (6), the pressing mechanism (6) comprises a fixed plate (601), the side of the base (1) is provided with the fixed plate (601), the bottom of the fixed plate (601) is fixed with four bottom shells (605) in a rectangular array, four slide columns (604) are slidably connected above the bottom shells (605), the first springs (607) are clamped between the slide columns (604) and the bottom shells (605), the slide columns (604) on the same side are both fixedly connected with pressing plates (602), the opposite two pressing plates (602) are fixedly connected with two connecting plates (603), sampling mechanisms (7) are arranged on the two pressing plates (602), the sampling mechanism (7) comprises two sliding blocks (701), the sliding blocks (701) are slidably connected to the two pressing plates (602), the interiors of the two pressing plates (602) are slidably connected with limiting blocks (705), the bottoms of the sliding blocks (701) are fixedly connected with plug plates (708), the limiting blocks (705) are provided with limiting openings (707), the plug plates (708) are inserted into the limiting openings (707), the second springs (706) are clamped between the sliding blocks (701) and the limiting blocks (705), the opposite two sliding blocks (701) are fixedly connected with slide rails (702), the slide rails (702) are slidably connected with blades (704), and a plurality of cutting grooves (703) are equidistantly arranged on the fixed plate (601).

2. A POF shrink film tensile testing device for food packaging according to claim 1, characterized in that: The pressing mechanism (6) further comprises rubber pads (606), and the bottoms of the two pressing plates (602) are both attached with the rubber pads (606).

3. A POF shrink film tensile testing device for food packaging according to claim 1, characterized in that: The interiors of the pressing plates (602) are in convex letter-shaped structures, and the two pressing plates (602) and the two connecting plates (603) are in rectangular structures.

4. A POF shrink film tensile testing device for food packaging according to claim 1, characterized in that: The control mechanism (2) comprises a controller (201), the base (1) is provided with the controller (201), and the base (1) is provided with a control switch (202) and an emergency stop button (203).

5. A POF shrink film tensile testing apparatus for food packaging according to claim 4, characterized in that: The driving mechanism (3) comprises an outer shell (301), the base (1) is provided with the outer shell (301), the inner portion of the outer shell (301) is provided with a motor (303), the motor (303) is electrically connected between the control switch (202) and the emergency stop button (203), the output end of the motor (303) is provided with a screw rod (304) rotatably connected with the bottom of the outer shell (301), and the screw rod (304) is threadedly connected with a sliding plate (305) slidably connected with the outer shell (301).

6. A POF shrink film tensile testing apparatus for food packaging according to claim 5, characterized in that: The driving mechanism (3) further comprises two baffles (302), the baffles (302) are arranged between the top and the bottom of the outer shell (301) and the sliding plate (305), and the baffles (302) are flexible baffles.

7. A POF shrink film tensile testing apparatus for food packaging according to claim 5, characterized in that: The clamping mechanism (4) comprises a top plate (402), the side of the sliding plate (305) is fixedly connected with the top plate (402), the top plate (402) is fixedly connected with two supporting rods (401) on the base (1) in opposite, the opposite ends of the two supporting rods (401) are fixedly connected with guide plates (403), the two guide plates (403) are threadedly connected with lead screws (405), the end portions of the two lead screws (405) are rotatably provided with clamping plates (404), and the bottom of the clamping plate (404) abuts against the top of the guide plate (403).

8. A POF shrink film tensile testing device for food packaging according to claim 7, characterized in that: The top plate (402) is provided with a protection mechanism (5), the protection mechanism (5) comprises a blocking shell (501), the outer side of the top plate (402) is slidably connected with the blocking shell (501), and the blocking shell (501) and the top plate (402) are inserted with a bolt (502).

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