CN220399117U - Dynamometer for testing heat seal strength and breaking force - Google Patents

Abstract

The utility model discloses a dynamometer for testing heat seal strength and breaking force, which relates to the field of measuring instruments and comprises a shell, wherein a dial, two measuring springs, a rotating gear, a rack and a rotating rod are arranged in the shell, the upper ends of the two measuring springs are fixedly connected with the shell, the lower ends of the rack are fixedly connected with a cross rod, the lower ends of the two measuring springs are fixedly connected with the cross rod, the rotating rod is rotationally connected with the shell, the rotating gear is coaxially and fixedly connected with the rotating rod, one end of the rotating rod is fixedly connected with a measuring pointer, the rotating rod is provided with a recording piece for recording the maximum reading, the lower end of the cross rod is fixedly connected with a vertical rod, and the lower end of the vertical rod is connected with a clamp. The application has the effect of being capable of conveniently and rapidly testing the simple heat seal strength and the breaking force.

Description

Dynamometer for testing heat seal strength and breaking force

Technical Field

The utility model relates to the field of measuring instruments, in particular to a dynamometer for testing heat seal strength and breaking force.

Background

The plastic is a polymer material with very wide application, has stable chemical property, corrosion resistance and strong plasticity, and is commonly used for packaging articles in living production, such as films, plastic bags and the like, or for producing pipes, daily necessities and the like.

Before plastic films are reprocessed after being formed, performance tests are required to be carried out on the plastic films, a heat sealing mode is often used for connection and sealing between the plastic films, and the breaking force and the strength after heat sealing of the plastic films are required to be tested in the performance tests.

At present, when testing the diaphragm, the test often relies on fixed clamping frame, stretching device and sensor, and test procedure is comparatively complicated, and test equipment is comparatively loaded down with trivial details, under certain special circumstances, need not to carry out accurate measurement to heat seal strength and breaking force, uses test equipment comparatively inconvenient this moment.

Disclosure of Invention

In order to conveniently and quickly perform simple heat seal strength and breaking force tests, the application provides a dynamometer for testing heat seal strength and breaking force.

The application provides a dynamometer for testing heat seal strength and breaking force, adopts following technical scheme:

the utility model provides a dynamometer for testing heat seal strength and breaking force, includes the casing, the inside calibrated scale that is equipped with of casing, two measurement springs, rotation gear, rack and bull stick, the upper end and the casing fixed connection of two measurement springs, tip fixedly connected with horizontal pole under the rack, the lower tip of two measurement springs all with horizontal pole fixed connection, bull stick and casing rotate to be connected, rotation gear and the coaxial fixed connection of bull stick, the one end fixedly connected with of bull stick measures the pointer, the bull stick is equipped with the record piece that is used for taking notes the maximum reading, tip fixedly connected with montant under the horizontal pole, the lower end connection of montant has anchor clamps.

Through adopting above-mentioned technical scheme, anchor clamps carry out the centre gripping to the measured diaphragm, the staff pulls the measured diaphragm along montant axis direction, the montant drives the horizontal pole and moves down, two measurement springs take place to stretch simultaneously, the rack drives and rotates the gear and rotate, the tensile length of measurement spring is directly proportional with the tensile force, the scale that the measurement pointer indicates is the tensile force that is measured the diaphragm, when the pulling force that exerts to the measured diaphragm increases gradually until diaphragm fracture or heat seal part take place to burst apart, the tensile force numerical value at this moment of record is recorded to the record, can comparatively simple convenient measurement heat seal intensity or the intensity of stretch-break force.

Optionally, the record piece includes record pointer, push pedal, pushing block and pivot, and the one end fixedly connected with revolving plate that the measuring pointer was kept away from to the bull stick, and the bull stick is worn to establish in the pivot and is connected with bull stick coaxial rotation, and the pivot both ends respectively with record pointer and push pedal fixed connection, push pedal and pushing block fixed connection, the pushing block is inconsistent with revolving plate, and the record pointer is located the measuring pointer top.

Through adopting above-mentioned technical scheme, when measuring the pointer and taking place to rotate along with rotating the gear, the bull stick drives and rotates together the board, and the board rotates through pushing block drive push pedal simultaneously for the record pointer rotates along with measuring the pointer together, when the diaphragm takes place to fracture by the measurement, when the tensile force that the montant was pulled disappears, measures the pointer resilience, pushing block and board separation, makes the push pedal still be the maximum reading, has reduced user's reading degree of difficulty.

Optionally, one side of push pedal away from the calibrated scale fixedly connected with stirs the piece, the casing offered with stir the ring channel of piece looks adaptation, stir the piece and wear to establish the ring channel setting.

Through adopting above-mentioned technical scheme, the staff is portable to stir the piece for stir the piece and be located the ring channel and slide, stir the piece and drive the push pedal and remove, and then drive the record pointer and rotate, make the record pointer return to zero and reset.

Optionally, anchor clamps include fixed block, splint, movable plate and screw rod, splint along fixed block length direction sliding connection, and movable plate is along fixed block width direction sliding connection, screw rod and fixed block threaded connection, screw rod rotation are connected with the movable rod, are equipped with the connecting piece that is used for connecting movable rod and movable plate between movable rod and the movable plate, and splint and with splint threaded connection are worn to establish to the screw rod.

Through adopting above-mentioned technical scheme, rotate the screw rod, the screw rod takes place relative displacement along screw axis direction with splint, drives the movable plate simultaneously and removes for keep away from each other or be close to each other between movable plate and the splint, accomplish the lax and the clamp of anchor clamps, movable plate and screw rod detachable connection, the user can unscrew the screw rod and change movable plate and splint, makes the measured object of anchor clamps adaptation different materials or shapes.

Optionally, the connecting piece includes spring pin and sleeve, and movable plate upper end and sleeve fixed connection, sleeve sliding connection are in the movable rod outside, and the spring pin sets up on the sleeve, and the through-hole with spring pin looks adaptation is seted up to the movable rod.

Through adopting above-mentioned technical scheme, outwards pulling spring pin for the spring pin can dismantle movable plate and screw rod from the separation in the through-hole, on the contrary with movable plate and screw rod connection, the simple operation is convenient, is convenient for change splint and the movable plate of different shapes.

Optionally, one side of calibrated scale near the measurement spring fixedly connected with gear two, gear two meshing have gear one, and gear one fixedly connected with extension rod, the one end that the extension rod kept away from gear one wears to establish the casing and fixedly connected with knob.

Through adopting above-mentioned technical scheme, rotate the knob, the extension rod drives gear one and rotates, and then drives gear two and rotate, and then makes the calibrated scale take place to rotate, and convenient to use person aligns the zero scale mark of measuring pointer and calibrated scale according to different service conditions.

Optionally, the casing lower extreme fixedly connected with gag lever post, gag lever post offer with the logical groove of montant looks adaptation, montant sliding connection is in logical groove.

Through adopting above-mentioned technical scheme, the gag lever post is spacing to the montant, reduces the skew of montant in the removal in-process for the montant removes along gag lever post length direction, is favorable to guaranteeing the accuracy of dynamometry result.

Optionally, the horizontal pole fixedly connected with tensioning spring, tensioning spring's the other end and rack fixed connection.

Through adopting above-mentioned technical scheme, tensioning spring is connected rack and horizontal pole, and the horizontal pole is exerted pulling force through tensioning spring to the rack, is favorable to guaranteeing that the rack meshes with the rotation gear all the time.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the clamp clamps the measured diaphragm, a worker pulls the measured diaphragm along the axial direction of the vertical rod, the vertical rod drives the cross rod to move downwards, meanwhile, the two measuring springs stretch, the rack drives the rotating gear to rotate, the stretching length of the measuring springs is in direct proportion to the tensile force, the scale indicated by the measuring pointer is the tensile force of the measured diaphragm, the tensile force applied to the measured diaphragm is gradually increased until the diaphragm breaks or the heat sealing part breaks, and the recording part records the tensile force value at the moment, so that the strength of heat sealing strength or breaking force can be measured more simply and conveniently;

2. when the measuring pointer rotates along with the rotating gear, the rotating rod drives the rotating plate to rotate together, meanwhile, the rotating plate drives the pushing plate to rotate through the pushing block, so that the recording pointer rotates along with the measuring pointer, when the measured diaphragm breaks, the tension force of the vertical rod disappears, the measuring pointer rebounds, and the pushing block is separated from the rotating plate, so that the pushing plate is still in maximum reading, and the reading difficulty of a user is reduced;

3. the staff can move and stir the piece for stir the piece and be located the ring channel and slide, stir the piece and drive the push pedal and remove, and then drive the record pointer and rotate, make the record pointer return to zero and reset.

Drawings

FIG. 1 is a schematic view of the overall structure of a load cell for testing heat seal strength and snap-apart force.

Fig. 2 is a schematic cross-sectional view of the housing.

Fig. 3 is a schematic cross-sectional view of the internal structure of the housing.

Fig. 4 is a schematic cross-sectional view of the clamp.

Reference numerals illustrate: 1. a housing; 11. a limit rod; 12. a through groove; 2. a dial; 21. a first gear; 22. a second gear; 23. an extension rod; 24. a knob; 3. measuring a spring; 4. rotating the gear; 5. a rack; 51. a cross bar; 52. a vertical rod; 53. tensioning a spring; 6. a rotating rod; 61. measuring a pointer; 71. recording a pointer; 72. a push plate; 73. a pushing block; 74. a rotating shaft; 75. a rotating plate; 76. a poking block; 77. an annular groove; 8. a clamp; 81. a fixed block; 82. a clamping plate; 83. a moving plate; 84. a screw; 85. a moving rod; 86. a connecting piece; 861. a spring pin; 862. a sleeve; 863. and a through hole.

Detailed Description

The present application is described in further detail below with reference to the accompanying drawings.

The embodiment of the application discloses a dynamometer for testing heat seal strength and breaking force.

Examples

Referring to fig. 1 and 2, a dynamometer for testing heat seal strength and breaking force comprises a shell 1, wherein a dial 2, two measuring springs 3, a rotary gear 4, a rack 5 and a rotating rod 6 are arranged in the shell 1, and the upper end part of the shell 1 is fixedly connected with a circular ring, so that a user can hang the dynamometer conveniently. The upper end of two measurement springs 3 and casing 1 fixed connection, rack 5 lower extreme fixedly connected with horizontal pole 51, the lower extreme of two measurement springs 3 all with horizontal pole 51 fixed connection, horizontal pole 51 lower extreme fixedly connected with montant 52, when montant 52 atress down removes, montant 52 drives horizontal pole 51 and removes down for two measurement springs 3 atress take place to stretch, rack 5 moves down along with horizontal pole 51 simultaneously.

Referring to fig. 2 and 3, the rotating rod 6 is rotatably connected with the housing 1, the rotating gear 4 is fixedly connected with the rotating rod 6 coaxially, the rotating gear 4 is meshed with the rack 5, when the rack 5 moves downwards along with the cross rod 51, the rack 5 drives the rotating gear 4 to rotate, one end of the rotating rod 6 is fixedly connected with the measuring pointer 61, and the measuring pointer 61 rotates along with the rotating rod 6. Since the tensile force of the measuring spring 3 is proportional to the tensile length of the measuring spring 3, the rotation angle of the rotating rod 6 is also proportional to the tensile force of the measuring spring 3, the measuring pointer 61 rotates, and the tensile force of the measuring spring 3 can be read out through the dial 2.

Referring to fig. 2 and 3, casing 1 fixedly connected with stopper, the sliding tray with rack 5 looks adaptation has been seted up to the stopper, rack 5 sliding connection is in the sliding tray, the stopper is spacing to rack 5, guarantee that rack 5 removes along its self length direction, and then guaranteed to rotate the meshing of gear 4 and rack 5, horizontal pole 51 fixedly connected with tensioning spring 53, tensioning spring 53's the other end and rack 5 fixed connection, horizontal pole 51 exerts the pulling force through tensioning spring 53 to rack 5, further guaranteed to rotate the meshing of gear 4 and rack 5.

Referring to fig. 1 and 2, the lower end portion of the vertical rod 52 is fixedly connected with a clamp 8, the clamp 8 can clamp the measured membrane, the number of the clamps 8 can be two, two ends of the measured membrane are clamped, one clamp 8 is fixedly connected with the vertical rod 52, the other clamp 8 is fixedly connected with a pull ring, and a user can conveniently pull or hang weights and the like. The lower end part of the shell 1 is fixedly connected with a limiting rod 11, the limiting rod 11 is provided with a through groove 12 matched with the vertical rod 52, the vertical rod 52 is slidably connected in the through groove 12, the limiting rod 11 limits the vertical rod 52, the limiting rod 11 is parallel to the measuring spring 3, the vertical rod 52 moves along the length direction of the limiting rod 11, the vertical rod 52 is not easy to deflect, and accuracy of a measuring result is guaranteed.

Referring to fig. 2 and 3, a second gear 22 is fixedly connected to one side of the dial 2, which is close to the measuring spring 3, the second gear 22 is meshed with a first gear 21, the first gear 21 can drive the second gear 22 to rotate, the first gear 21 is fixedly connected with an extension rod 23, one end, which is far away from the first gear 21, of the extension rod 23 penetrates through the shell 1 and is fixedly connected with a knob 24, and the user can rotate the knob 24 to drive the extension rod 23 to rotate, so that the first gear 21 is driven to rotate, and the second gear 22 drives the dial 2 to rotate. When the dynamometer is used vertically and horizontally, due to the influence of dead weight, the positions of the measuring pointer 61 are different when the measuring pointer 61 is not stressed, and the rotary knob 24 can be rotated to enable the dial 2 to rotate, so that the zero position of the dial 2 is aligned with the measuring pointer 61.

Referring to fig. 2 and 3, the rotating rod 6 is provided with a recording part for recording the maximum reading, the tensile force when the measured diaphragm breaks in the measuring process is the heat seal strength or the breaking force, and the recording part can record the maximum tensile force in the measuring process, so that the reading difficulty of a user is reduced. The recording part comprises a recording pointer 71, a push plate 72, a pushing block 73 and a rotating shaft 74, wherein the rotating shaft 74 penetrates through the rotating rod 6 and is connected with the rotating rod 6 in a coaxial rotating manner, two ends of the rotating shaft 74 are fixedly connected with the recording pointer 71 and the push plate 72 respectively, the rotating shaft 74 can rotate with the rotating rod 6, and the recording pointer 71 and the push plate 72 rotate together with the rotating shaft 74.

Referring to fig. 2 and 3, one end of the rotating rod 6 away from the measuring pointer 61 is fixedly connected with a rotating plate 75, when the rack 5 drives the rotating gear 4 to rotate, the rotating rod 6 drives the measuring pointer 61 and the rotating plate 75 to rotate together, the push plate 72 is fixedly connected with the push block 73, the push block 73 is abutted against the rotating plate 75, when the rotating plate 75 rotates along with the rotating rod 6, the rotating plate 75 is abutted against the push block 73 and drives the push block 73 to move together, so that the push plate 72, the rotating shaft 74 and the recording pointer 71 rotate together, when the measuring pointer 61 reaches the maximum value, the recording pointer 71 is located above the measuring pointer 61, and the recording pointer 71 is overlapped with the measuring pointer 61 to be located at the same maximum value.

Referring to fig. 2 and 3, when the measured diaphragm breaks, the tension force of the vertical rod 52 disappears, so that the rotating gear 4 reversely rotates along with the retraction of the measuring spring 3, the measuring pointer 61 reversely rotates to zero, at this time, the rotating plate 75 returns along with the measuring pointer 61, the pushing block 73 is separated from the rotating plate 75, the pushing plate 72 does not reversely rotate along with the rotating plate 75, the recording pointer 71 stays at the position of the maximum tension reading, and the user can know the measuring result by reading the reading pointed by the recording pointer 71.

Referring to fig. 2 and 4, a stirring block 76 is fixedly connected to one side, far away from the dial 2, of the push plate 72, an annular groove 77 matched with the stirring block 76 is formed in the shell 1, the stirring block 76 penetrates through the annular groove 77, after measurement is finished, the stirring block 76 is moved, the stirring block 76 moves along the annular groove 77, the push plate 72 can be driven to rotate, and the recording pointer 71 is convenient to return to zero and reset. The clamp 8 comprises a fixed block 81, a clamping plate 82, a moving plate 83 and a screw 84, when the number of the clamps 8 is two, one clamp 8 is fixedly connected with the vertical rod 52, namely the fixed block 81 is fixedly connected with the vertical rod 52.

Referring to fig. 1 and 4, the screw rod 84 is in threaded connection with the fixed block 81, the screw rod 84 is connected with the fixed block 81 along the width direction of the fixed block 81, the screw rod 84 is rotated to enable the screw rod 84 to move along the width direction of the fixed block 81, the screw rod 84 is rotationally connected with the moving rod 85, a connecting piece 86 for connecting the moving rod 85 with the moving plate 83 is arranged between the moving rod 85 and the moving plate 83, the screw rod 84 moves to drive the moving rod 85 to move along the fixed width direction, the moving plate 83 is in sliding connection along the width direction of the fixed block 81, and the screw rod 84 drives the moving plate 83 to slide along the width direction of the fixed block 81.

Referring to fig. 1 and 4, the clamping plate 82 is slidably connected along the length direction of the fixing block 81, the screw 84 penetrates through the clamping plate 82 and is in threaded connection with the clamping plate 82, when the screw 84 rotates, the fixing block 81 limits the clamping plate 82, so that the clamping plate 82 does not displace in the width direction of the fixing block 81, and meanwhile, the moving plate 83 is close to or far away from the clamping plate 82, so that loosening and clamping of the clamp 8 are completed. The clamping plate 82 is detachably connected with the fixed block 81, the movable plate 83 and the movable rod 85 can be detached through the detachable connecting piece 86, and a user can replace the clamping plate 82 and the movable plate 83 according to the use condition, so that the clamping plate 82 and the movable plate 83 adapt to diaphragms with different shapes or sizes.

Referring to fig. 1 and 4, the connecting piece 86 includes a spring pin 861 and a sleeve 862, the upper end of the moving plate 83 is fixedly connected with the sleeve 862, the spring pin 861 is disposed on the sleeve 862, a through hole 863 adapted to the spring pin 861 is formed in the moving rod 85, the spring pin 861 is pulled outwards, the sleeve 862 is connected to the outer side of the moving rod 85 in a sliding manner, the spring pin 861 is released, the spring pin 861 enters the through hole 863 under the action of elastic force, the sleeve 862 is connected with the moving rod 85, and when the moving rod 85 moves, the sleeve 862 and the moving plate 83 can be driven to move together. When the moving plate 83 needs to be detached, the spring pin 861 is pulled outwards again, so that the spring pin 861 is separated from the through hole 863, and the sleeve 862 and the moving rod 85 are separated, so that the moving plate 83 can be detached.

The implementation principle of the dynamometer for testing heat seal strength and breaking force in the embodiment of the application is as follows: the measured diaphragm is pulled, the clamp 8 and the vertical rod 52 are stressed and moved, the measuring spring 3 is stretched, the measuring pointer 61 is driven to rotate, the rotating plate 75 rotates along with the rotation of the rotating rod 6, the push plate 72 and the recording pointer 71 are pushed to rotate, the recording pointer 71 moves to the maximum tensile force, when the measuring pointer 61 rotates to zero, the pushing block 73 is separated from the rotating plate 75, the recording pointer 71 stays at the maximum tensile force, the user can read conveniently, the operation is simple, and the heat seal strength and the breaking force which do not need to be measured accurately can be tested simply and conveniently.

The foregoing are all preferred embodiments of the present application, and are not intended to limit the scope of the present application in any way, therefore: all equivalent changes in structure, shape and principle of this application should be covered in the protection scope of this application.

Claims (8)

1. Dynamometer for testing heat seal strength and breaking force, comprising a housing (1), characterized in that: inside calibrated scale (2), two measurement springs (3), rotation gear (4), rack (5) and bull stick (6) of being equipped with of casing (1), the upper end and casing (1) fixed connection of two measurement springs (3), tip fixedly connected with horizontal pole (51) under rack (5), the lower tip of two measurement springs (3) all with horizontal pole (51) fixed connection, bull stick (6) rotate with casing (1) to be connected, rotation gear (4) and bull stick (6) coaxial fixed connection, the one end fixedly connected with of bull stick (6) measures pointer (61), bull stick (6) are equipped with the record piece that is used for taking notes the maximum reading, tip fixedly connected with montant (52) under horizontal pole (51), the lower end connection of montant (52) has anchor clamps (8).

2. A load cell for testing heat seal strength and snap-apart force as claimed in claim 1, wherein: the recording part comprises a recording pointer (71), a push plate (72), a push block (73) and a rotating shaft (74), wherein one end, far away from the measuring pointer (61), of the rotating rod (6) is fixedly connected with the rotating plate (75), the rotating shaft (74) penetrates through the rotating rod (6) and is coaxially connected with the rotating rod (6) in a rotating mode, two ends of the rotating shaft (74) are respectively fixedly connected with the recording pointer (71) and the push plate (72), the push plate (72) is fixedly connected with the push block (73), the push block (73) is abutted against the rotating plate (75), and the recording pointer (71) is located above the measuring pointer (61).

3. A load cell for testing heat seal strength and snap-apart force as claimed in claim 2, wherein: one side of the push plate (72) far away from the dial (2) is fixedly connected with a stirring block (76), an annular groove (77) matched with the stirring block (76) is formed in the shell (1), and the stirring block (76) penetrates through the annular groove (77).

4. A load cell for testing heat seal strength and snap-apart force as claimed in claim 1, wherein: the fixture (8) comprises a fixed block (81), a clamping plate (82), a moving plate (83) and a screw rod (84), wherein the clamping plate (82) is in sliding connection along the length direction of the fixed block (81), the moving plate (83) is in sliding connection along the width direction of the fixed block (81), the screw rod (84) is in threaded connection with the fixed block (81), the screw rod (84) is rotationally connected with a moving rod (85), a connecting piece (86) used for connecting the moving rod (85) with the moving plate (83) is arranged between the moving rod (85) and the moving plate (83), and the screw rod (84) penetrates through the clamping plate (82) and is in threaded connection with the clamping plate (82).

5. A load cell for testing heat seal strength and snap-apart force as defined in claim 4, wherein: the connecting piece (86) comprises a spring pin (861) and a sleeve (862), the upper end of the movable plate (83) is fixedly connected with the sleeve (862), the sleeve (862) is slidably connected to the outer side of the movable rod (85), the spring pin (861) is arranged on the sleeve (862), and a through hole (863) matched with the spring pin (861) is formed in the movable rod (85).

6. A load cell for testing heat seal strength and snap-apart force as claimed in claim 1, wherein: one side of the dial (2) close to the measuring spring (3) is fixedly connected with a gear II (22), the gear II (22) is meshed with a gear I (21), the gear I (21) is fixedly connected with an extension rod (23), and one end of the extension rod (23) far away from the gear I (21) penetrates through the shell (1) and is fixedly connected with a knob (24).

7. A load cell for testing heat seal strength and snap-apart force as claimed in claim 1, wherein: the lower end part of the shell (1) is fixedly connected with a limiting rod (11), the limiting rod (11) is provided with a through groove (12) matched with the vertical rod (52), and the vertical rod (52) is slidably connected in the through groove (12).

8. A load cell for testing heat seal strength and snap-apart force as claimed in claim 1, wherein: the transverse rod (51) is fixedly connected with a tensioning spring (53), and the other end of the tensioning spring (53) is fixedly connected with the rack (5).