A bursting strength testing device for pharmaceutical packaging materials

Abstract

The present application discloses a bursting resistance detection device for pharmaceutical packaging materials, which belongs to the field of bursting resistance detection technology. It mainly includes a base; an unwinding unit, which is composed of an unwinding roller and two sets of placement brackets, a film is wound on the unwinding roller, and a motor is installed on the side of the placement bracket; a rewinding unit, which is similar to the unwinding unit; a slide plate, and fixed seats are installed at both ends of the slide plate; a screw rod, a spiral groove is opened on the screw rod, and a connecting rod is connected to the two sets of spiral grooves; a movable rod, a limiting groove is opened on the connecting rod, and a side protrusion is installed on the movable rod, and a pressure roller is installed between the two sets of movable rods; a first gear, and a first rack is installed on the protruding part. A bursting resistance detection device for pharmaceutical packaging materials of the present application, the film is smoothed and wrinkled by a flattening mechanism, and the subsequent half-pressure ring is preliminarily fixed to the smoothed film under the action of the second spring to prevent the pressure roller from passing over the film and the film from wrinkling when it returns to its initial state.

Description

Technical Field

[0001] The present application relates to the technical field of bursting resistance detection, and in particular to a bursting resistance detection device for pharmaceutical packaging materials. Background Art

[0002] Burst resistance refers to the maximum uniformly increased pressure that a material can withstand per unit area. For pharmaceutical packaging materials, burst resistance testing is one of the important indicators for evaluating their quality. It can reflect the ability of packaging materials to resist rupture under external force and ensure the safety and integrity of drugs during transportation, storage and sales.

[0003] Among them, the bursting strength test of pharmaceutical packaging materials is an important test item for evaluating the quality and performance of pharmaceutical packaging materials. Pharmaceutical packaging materials need to have sufficient strength to protect the drugs from external damage during transportation, storage and use. The bursting strength test is to measure the maximum pressure that the packaging material can withstand, so as to determine whether it meets the relevant quality standards and ensure that the pharmaceutical packaging will not break under normal use, thereby ensuring the safety and effectiveness of the drugs;

[0004] The bursting resistance testing device mainly includes a hydraulic cylinder or a pneumatic device, a pressure head, an upper chuck, a clamping drive mechanism, a control panel and a film. During the test, the sample is placed on the pressure head, which clamps the periphery of the sample through a drive mechanism, so that the sample and the film can bulge freely. Then, the fluid is pumped in at a steady rate through the hydraulic or pneumatic system, and the film begins to bulge and gradually applies pressure to the sample. When the pressure increases to a certain level, the sample ruptures.

[0005] However, in some burst resistance testing devices, the film is placed between the upper chucks. The upper chuck is usually fixed, and a part of the film will be flat on the surface of the upper chuck. When preparation for testing is required, the pressure head is raised, one end of the film is placed on the upper chuck, and then the film is flattened by a manual or automatic feeding device so that the film covers the appropriate area of ​​the upper chuck. Finally, the pressure head is lowered to clamp the edge of the film. However, in the process of manually flattening the film, it is difficult to ensure that the film is completely flat and wrinkle-free. Human strength and operating accuracy are limited, which may cause the film to be over-stretched or under-stretched locally, resulting in wrinkles. These wrinkles will affect the uniform distribution of pressure in the subsequent testing process, causing uneven local force on the sample of the pharmaceutical packaging material, thereby affecting the accuracy of the burst resistance test. Therefore, it is necessary to provide a burst resistance testing device for pharmaceutical packaging materials to solve the above problems.

[0006] It should be noted that the above information disclosed in this background technology section is only for understanding the background technology of the present application concept, and therefore, it may contain information that does not constitute the prior art. Summary of the invention

[0007] Based on the above-mentioned problems existing in the prior art, the problem to be solved by the present application is: to provide a bursting resistance testing device for pharmaceutical packaging materials, which realizes the coordinated operation of an unwinding unit and a rewinding unit. Driven by a motor, the unwinding roller can quickly and stably provide a brand new film for each test, and at the same time, the flattening mechanism can smooth and remove wrinkles on the film, so that the film is as flat as possible before placing the pharmaceutical packaging material sample.

[0008] The technical solution adopted by the present application to solve its technical problem is: a device for detecting the bursting resistance of pharmaceutical packaging materials, characterized in that it comprises: a base, a support seat is installed on the base, the support seat has a protrusion, a cylinder is installed on the protrusion, and a pressure head is installed at the output end of the cylinder; a reeling unit, the reeling unit is installed on the base, the reeling unit is composed of a reeling roller and two groups of placement brackets, the reeling roller rotates between the two groups of placement brackets, a film is wound on the reeling roller, and a motor is installed on the side of one group of the placement brackets; a reeling unit, the reeling unit is installed on the base, the reeling unit and the reeling unit are of similar structure; a mounting plate, the mounting plate is installed on the output end of the cylinder, two groups of moving units are installed on the mounting plate, and the moving unit comprises: a slide plate, the slide plate is installed on the mounting plate, and fixed seats are installed at the positions of the two ends of the slide plate;

[0009] The cam is provided with a plurality of spiral grooves, each of which is connected with a connecting rod, and the two ends of the spiral grooves are connected with connecting rods respectively. The connecting rod is slidably connected with the bottom of the sliding seat plate; the movable rod is slidably mounted on one end of the connecting rod, and a limiting groove is provided on the side of the connecting rod, and a side protrusion is installed on the movable rod. One end of the movable rod is movably sleeved with a connecting plate, and a groove is provided on the connecting plate. One end of the movable rod extends into the groove, and through grooves are provided on both sides of the connecting plate. The through groove is connected with the groove, and a pressure roller is installed between the two groups of connecting plates, and the pressure roller passes through the through groove. A first spring is arranged between the side protrusion and the top of the inner wall of the limiting groove; a first gear, which is mounted on one end of the screw rod, and a first rack is installed on the protruding portion, and the first rack is composed of a first meshing tooth located at the lower end and a first smooth section located at the upper end.

[0010] Further, the first gear is initially located at the position of the first smooth section.

[0011] Furthermore, two groups of support plates are installed on the base, and slide rails are installed on the support plates. One end of the movable rods of the two groups of mobile units is provided with sliding grooves adapted to the slide rails, and the movable rods slide linearly on the slide rails through the sliding grooves.

[0012] Furthermore, a clamping mechanism is installed on the side of the support plate, and the clamping mechanism includes a support platform installed on the side of the support plate, and two groups of relatively arranged slide plates are placed on the support platform. Slide grooves are opened on both sides of the slide plate, and the slide grooves have a three-section structure, which is composed of a first slide groove at a higher level, a second slide groove inclined downward in the middle, and another third slide groove at a lower level, which are connected in sequence. A pulley is installed between the slide grooves on both sides, and the pulley is initially located in the first slide groove.

[0013] Furthermore, a connecting rod is hinged on the pulley, and the connecting rod is a horizontal section. The horizontal section of the connecting rod movably passes through the movable rod, and an open groove is provided on the movable rod. A semi-compression ring is installed between the two groups of the connecting rods, and the two groups of the semi-compression rings are connected to form a ring structure.

[0014] Furthermore, a limiting rod is installed at the upper end of the horizontal section of the connecting rod, a fixing plate is installed on the protrusion, the limiting rod movably passes through the fixing plate, a second spring is sleeved on the limiting rod, one end of the second spring is fixedly connected to the connecting rod, the other end of the second spring is fixedly connected to the bottom surface of the fixing plate, the second spring is in a compressed state in the initial state, and a connecting piece is installed on the side of the movable rod, one end of the connecting piece is fixedly connected to the slide plate.

[0015] Furthermore, the two groups of half pressure rings are butt-jointed to form an annular structure located directly above the pressure roller, and there is a certain gap between the two groups of half pressure rings and the pressure roller.

[0016] Furthermore, the two ends of the pressure roller are rotatably connected to the movable rod, and a feeding mechanism is installed on the pressure roller. The feeding mechanism includes discharge plates installed on two groups of the pressure rollers, and both ends of one group of the discharge plates have through openings. In the initial state, the two groups of the discharge plates are close to each other and fit each other to form a relatively closed space.

[0017] Furthermore, a second gear is installed at one end of the pressure roller, a second rack is installed on the support plate, and the second rack has second meshing teeth.

[0018] Furthermore, a shield is installed on the supporting platform.

[0019] The beneficial effect of the present application is that the present application provides a bursting resistance testing device for pharmaceutical packaging materials, which can smooth and remove wrinkles on the film through a flattening mechanism, so that the film is as flat as possible before placing the pharmaceutical packaging material sample. The subsequent half-pressure ring preliminarily fixes the smoothed film under the action of the second spring, further preventing the pressure roller from passing over the film, so that the film returns to its initial state with wrinkles. At the same time, through the design of the discharge plate in the feeding mechanism, a stable initial placement position and limit are first provided for the pharmaceutical packaging material sample, avoiding displacement or shaking of the sample before the device is started.

[0020] In addition to the above-described purposes, features and advantages, the present application also has other purposes, features and advantages. The present application will be further described in detail with reference to the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings constituting part of the present application are used to provide a further understanding of the present application. The exemplary embodiments and descriptions of the present application are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0022] Figure 1 This is an overall schematic diagram of a bursting strength testing device for pharmaceutical packaging materials in this application;

[0023] Figure 2 for Figure 1 A schematic diagram of the structure of a bursting strength testing device;

[0024] Figure 3 for Figure 1 Exploded diagram of

[0025] Figure 4 for Figure 3 A magnified schematic diagram of the middle A area;

[0026] Figure 5 for Figure 1 Structural schematic diagram of the flattening mechanism and feeding mechanism;

[0027] Figure 6 for Figure 5 A magnified schematic diagram of the middle B area;

[0028] Figure 7 for Figure 4 Enlarged schematic diagram of the middle C area;

[0029] Among them, the reference numerals in the figure are:

[0030] 1. base; 101. support leg; 102. support base; 103. printer; 104. cylinder; 105. pressure head; 106. bottom plate; 107. lower chuck; 108. upper chuck;

[0031] 2. Unwinding mechanism; 201. Unwinding roller; 202. Rewinding roller;

[0032] 3. Flattening mechanism; 301. Mounting plate; 302. Sliding seat plate; 303. Fixed seat; 304. Screw rod; 305. First gear; 306. Connecting rod; 307. Movable rod; 308. Limiting groove; 309. Support plate; 310. Slide rail; 311. Pressing roller; 312. Blocking cover; 313. First rack; 314. First smooth section; 315. Connecting plate; 316. Through groove;

[0033] 4. Feeding mechanism; 401. Feeding plate; 402. Second gear; 403. Second rack;

[0034] 5. Clamping mechanism; 501. Half-pressure ring; 502. Connecting rod; 503. Slide plate; 504. Slide groove; 505. Pulley; 506. Limiting rod; 507. Second spring; 508. Fixed plate; 509. Connecting piece. DETAILED DESCRIPTION

[0035] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0036] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0037] Embodiment 1: This embodiment describes the structure and working principle of a bursting strength detection device for pharmaceutical packaging materials, specifically:

[0038] like Figure 1-Figure 4 As shown, the present application provides a bursting strength testing device for pharmaceutical packaging materials, comprising a base 1, on which four groups of supporting legs 101 are fixedly mounted, the supporting legs 101 being suitable for supporting and placing the base 1 somewhere, and a printer 103 being fixedly mounted on the base 1, the printer 103 being used to print the bursting strength test result of the pharmaceutical packaging material sample, and a control system being arranged inside the base 1;

[0039] The printer 103 is connected to the control system inside the device. When the test is completed, the control system transmits the processed test data, such as the pressure value when the sample breaks, the corresponding bursting strength value and other information to the printer 103. The printer 103 quickly prints out the report in a preset format, which is convenient for the operator to record, archive and analyze and evaluate the quality of drug packaging in the future;

[0040] A bottom plate 106 is fixedly mounted on the base 1, a lower chuck 107 is fixedly mounted on the bottom plate 106, and an upper chuck 108 is embedded and placed on the lower chuck 107, the upper chuck 108 is used to place a sample of a pharmaceutical packaging material, and a support seat 102 is fixedly mounted on the base 1, the support seat 102 having a protrusion;

[0041] A cylinder 104 is fixedly installed in the protruding part, and the output end of the cylinder 104 passes through the protruding part, and a pressure head 105 is fixedly installed at the output end of the cylinder 104. The pressure head 105 is suitable for moving closer to or away from the upper clamping plate 108 along with the output end of the cylinder 104 to achieve a pressing operation on the drug packaging material sample, thereby simulating an actual force scene, or loosening the drug packaging material sample after the test is completed, so as to facilitate the rapid replacement of the next sample to be tested;

[0042] A reeling mechanism 2 is installed on the base 1, and the reeling mechanism 2 includes a reeling unit installed on the base 1, and the reeling unit is composed of a reeling roller 201 and two sets of placement brackets. The reeling roller 201 rotates between the two sets of placement brackets, and a film is wound on the reeling roller 201, and a motor (not shown in the figure) is fixedly installed on the side of one set of placement brackets. The motor is connected to one end of the reeling roller 201 through a coupling. When the motor is started, the reeling roller 201 is driven to rotate, so as to realize the reeling of the film and provide the required film material for the detection process;

[0043] The unwinding mechanism 2 also includes a rewinding unit installed on the base 1. The rewinding unit and the unwinding unit have similar structures. Here, the unwinding roller 201 of the unwinding unit is defined as the rewinding roller 202. One end of the film wound on the unwinding roller 201 is connected to the rewinding roller 202 to form a closed loop. The rewinding roller 202 is also driven by the motor to run synchronously with the unwinding action of the unwinding roller 201, so that the used film is recovered in time, ensuring the reasonable circulation of the film in the device, and avoiding the film from being damaged due to long-term use and affecting the detection;

[0044] A hydraulic cylinder (not shown) is fixedly installed inside the base 1. The lower chuck 107 and the upper chuck 108 both have a circular through hole. The output end of the hydraulic cylinder passes through the circular through hole. The hydraulic cylinder is suitable for starting to deliver hydraulic oil to push the film upward to deform, so as to squeeze the sample of the pharmaceutical packaging material.

[0045] In summary: the test sample is placed on the upper chuck 108 and on the film at the same time, and then the cylinder 104 is started to drive the pressure head 105 to move downward, so that the drug packaging material sample and the film are pressed tightly on the upper chuck 108. At this time, the hydraulic cylinder is started, and the hydraulic oil pushes the film to deform upward and squeeze the test sample until the sample breaks;

[0046] At this time, the control system transmits the processed test data, such as the pressure value when the sample breaks, the corresponding bursting strength value and other information to the printer 103, and the printer 103 quickly prints out the report according to the preset format, which is convenient for the operator to record, archive and analyze and evaluate the quality of the drug packaging in the future;

[0047] The unwinding roller 201, driven by a motor, can quickly and stably provide new film for each test, ensuring the consistency of the test environment and avoiding interference with the test results due to problems such as repeated use and wear of the film. On the other hand, the winding unit and the unwinding unit work together to recycle the used film in time, reducing the tedious steps of manual film cleaning, so that the entire test process can continue uninterrupted.

[0048] Embodiment 2: When the film is stretched by the unwinding unit and the winding unit, longitudinal wrinkles may exist on the film. During the test, when longitudinal wrinkles exist on the film, it will have a certain impact on the bursting test of the pharmaceutical packaging material sample, that is, the wrinkled part of the film will cause uneven pressure distribution. If the wrinkle is located below the pharmaceutical packaging material sample, when the hydraulic cylinder pushes the film to deform upward and squeeze the sample, the film at the wrinkle may not be able to effectively transmit the pressure, so that the local force on the sample is too large or too small;

[0049] In order to solve the above problems, Figure 4-Figure 7 As shown, a flattening mechanism 3 is installed on the output end of the cylinder 104, and the flattening mechanism 3 includes a mounting plate 301 fixedly mounted on the output end of the cylinder 104, and two sets of moving units are installed on the mounting plate 301, and the moving unit includes a slide plate 302 fixedly mounted on a side of the mounting plate 301 close to the unwinding mechanism 2, and fixed seats 303 are fixedly mounted on the slide plate 302 near both ends, and the slide plate 302 is suitable for synchronous movement with the movement of the output end of the cylinder 104, and in the initial state, the output end of the cylinder 104 is in a contracted state, so that the slide plate 302 is in the uppermost position;

[0050] A screw rod 304 is connected to the bearing between the two sets of fixed seats 303, and both ends of the screw rod 304 are arranged through the fixed seats 303, and two sets of spiral grooves with opposite spiral rotation directions are opened on the screw rod 304, and connecting rods 306 are respectively connected to the two sets of spiral grooves in a transmission manner, and the connecting rods 306 are slidably connected to the bottom of the sliding seat plate 302, so that the screw rod 304 is suitable for rotation, so that the two sets of connecting rods 306 slide synchronously, and under the action of the two sets of spiral grooves with opposite spiral rotation directions, they move away from or approach each other, and in the initial state, the two sets of connecting rods 306 are in a position close to each other;

[0051] A movable rod 307 is slidably mounted on one end of the connecting rod 306, and a limiting groove 308 is opened on the side of the connecting rod 306. At the same time, a side protrusion (not shown in the figure) is fixedly mounted on the movable rod 307. The movable rod 307 slides in the limiting groove 308 through the side protrusion to ensure the relative movement between the movable rod 307 and the connecting rod 306, so that the movable rod 307 can telescopically slide along the linear direction of the limiting groove 308. In this embodiment, when the slide plate 302 is at the uppermost and lowermost positions, the movable rod 307 will never slip off the connecting rod 306.

[0052] A connecting plate 315 is movably sleeved at one end of the movable rod 307, and a groove matching the size of the movable rod 307 is provided on the connecting plate 315. One end of the movable rod 307 extends into the groove, and through grooves 316 are provided on both sides of the connecting plate 315. The through grooves 316 are connected to the grooves. A pressure roller 311 is connected between the two groups of transversely arranged connecting plates 315. The pressure roller 311 passes through the through grooves 316 (such as Figure 7 ), and in the initial state, the pressing roller 311 is at a certain distance from the film in the vertical direction, and in the horizontal direction, the two groups of connecting rods 306 are close to each other, so that the two groups of pressing rollers 311 are close to each other;

[0053] A first spring (not shown in the figure) is arranged between the side protrusion and the top of the inner wall of the limiting groove 308. The first spring is used to limit the initial movement of the movable rod 307, so that when the connecting rod 306 moves downward, one end of the movable rod 307 can first extend into the groove and drive the pressure roller 311 to move downward synchronously. Then, when one end of the movable rod 307 extends into the limit position in the groove, the connecting rod 306 gradually compresses the first spring and is sleeved on the movable rod 307. In this embodiment, when the sliding seat plate 302 is at the uppermost and lowermost positions, the movable rod 307 will never slip off the connecting plate 315.

[0054] In order to drive the two sets of pressing rollers 311 to smooth the film, Figure 4As shown, a first gear 305 is fixedly mounted on one end of the screw rod 304, and a first rack 313 is fixedly mounted on the protruding portion. The first rack 313 is composed of a first meshing tooth at the lower end and a first smooth section 314 at the upper end. In the initial state, the first gear 305 is located at the position of the first smooth section 314.

[0055] In order to maintain the stability of the two sets of rollers 311 in the horizontal direction, Figure 4 As shown, two groups of support plates 309 are fixedly mounted on the base 1, and a slide rail 310 is fixedly mounted on the support plate 309. At the same time, one end of the movable rod 307 of the two groups of movable units is provided with a sliding groove adapted to the slide rail 310, and the movable rod 307 slides linearly on the slide rail 310 through the sliding groove;

[0056] When the cylinder 104 is started, the output end of the cylinder 104 starts to move, so as to drive the mounting plate 301 to move downward synchronously. At this stage, since the first gear 305 is in the first smooth section 314 of the first rack 313, the first gear 305 does not rotate. At the same time, the two groups of moving units, relying on the fixed connection relationship with the mounting plate 301, will move downward synchronously with the downward movement of the mounting plate 301, and then the downward movement of the connecting rod 306 drives the movable rod 307 to move downward, and then pushes the movable rod 307 to retract into the connecting plate 315. At the same time, the movement of the movable rod 307 drives the pressure roller 311 to move downward in a straight line synchronously. During the whole process, the relative positions of the various components remain stable, but the whole is close to the film in the vertical direction.

[0057] As the mounting plate 301 continues to move downward, when the first gear 305 gradually contacts the position of the first meshing tooth on the first rack 313, the pressure roller 311 just contacts the upper surface of the film, and the movable rod 307 retracts into the bottom end of the inner wall of the groove in the connecting plate 315. Then, as the cylinder 104 continues to start, the output end moves further downward, and the first gear 305 meshes and rotates with the first meshing tooth on the first rack 313. As the first gear 305 at one end of the screw rod 304 starts to rotate, the two groups of connecting rods 306 move away from each other under the drive of the screw rod 304, thereby driving the two groups of pressure rollers 311 to move away from each other, and the film begins to be smoothed and wrinkle-removed.

[0058] In this process, since the two groups of connecting rods 306 move downward synchronously with the output end of the cylinder 104 to achieve meshing with the first meshing teeth on the first rack 313, and then move away from each other, and the downward movement of the connecting rod 306 will indirectly drive the synchronous downward movement of the pressure roller 311 through the movable rod 307, the movable rod 307 can slide in the limiting groove 308 with the help of the side protrusion and compress the first spring, and shrink in the connecting rod 306 accordingly to absorb the vertical distance that the connecting rod 306 drives the pressure roller 311 to continue to move downward, so that when the first gear 305 meshes with the first meshing teeth on the first rack 313, after the pressure roller 311 contacts the surface of the film, the two groups of pressure rollers 311 can still keep moving horizontally at all times;

[0059] Furthermore, the movable rod 307 plays a crucial role in regulating and stabilizing the process of the flattening mechanism 3 to smooth out the film and remove wrinkles, thereby ensuring that the film can be smoothed as much as possible, thus creating good conditions for subsequent accurate burst resistance testing of pharmaceutical packaging material samples.

[0060] Embodiment 3: After the two sets of rollers 311 complete the smoothing and wrinkle-removing operation on the film under the drive of the screw 304, the film is temporarily in a flat state. However, when the screw 304 rotates, the connecting rod 306 connected thereto drives the rollers 311 away from each other. If there is no additional restraint at this time, the film loses the tight pressing of the rollers 311 and wrinkles appear again;

[0061] In order to solve the above problems, Figure 5-Figure 6 As shown, a clamping mechanism 5 is installed on the side of the support plate 309, and the clamping mechanism 5 includes a support platform (not shown) fixedly installed on the side of the support plate 309, and two sets of slide plates 503 arranged opposite to each other are placed on the support platform, and sliding grooves 504 are opened on both sides of the slide plates 503. The sliding grooves 504 present a three-section structure, which are connected in sequence by a first slide groove at a higher position, a second slide groove inclined downward in the middle, and another third slide groove at a lower position, and a pulley 505 is connected and installed between the slide grooves 504 on both sides. The pulley 505 is initially located in the first slide groove at the upper end and is suitable for sliding along the direction of the first slide groove;

[0062] A shield 312 is fixedly mounted on the support platform, and the shield 312 is suitable for covering and protecting the slide plate 503;

[0063] A connecting rod 502 is hinged on the pulley 505. The connecting rod 502 is a horizontal section, and the horizontal section of the connecting rod 502 movably passes through the movable rod 307. At the same time, an opening groove (not shown in the figure) adapted to the width of the connecting rod 502 is opened on the movable rod 307. A half pressure ring 501 is fixedly installed between the two groups of connecting rods 502. The two groups of half pressure rings 501 are connected to form an annular structure. The annular structure can effectively press the rubber film to prevent the rubber film from wrinkling after losing the pressure of the pressure roller 311.

[0064] A limiting rod 506 is fixedly installed on the upper end of the horizontal section of the connecting rod 502, and a fixing plate 508 is fixedly installed on the protruding portion. The limiting rod 506 movably penetrates the fixing plate 508, and a second spring 507 is sleeved on the limiting rod 506. One end of the second spring 507 is fixedly connected to the connecting rod 502, and the other end of the second spring 507 is fixedly connected to the bottom surface of the fixing plate 508. The second spring 507 is in a compressed state in the initial state;

[0065] At the same time, a connecting member 509 is fixedly installed on the side of the movable rod 307, and one end of the connecting member 509 is fixedly connected to the slide plate 503, so that the slide plate 503 is suitable for synchronous movement with the movement of the movable rod 307;

[0066] It should be noted that the two groups of half pressure rings 501 are butt-jointed to form an annular structure located directly above the pressure roller 311, and there is a certain gap between the two groups of half pressure rings 501 and the pressure roller 311;

[0067] When the first gear 305 passes over the position of the first meshing tooth on the first rack 313, the two sets of rollers 311 still maintain the smoothing effect on the film, but have shown a trend of gradually moving away from the film. At this time, the movable rod 307 will continue to drive the connecting member 509, and the connecting member 509 will further drive the slide plate 503 to move;

[0068] As the slide plate 503 moves, the pulley 505 installed between the sliding grooves 504 will gradually slide from the first sliding groove to the second sliding groove. Due to the change in the position of the pulley 505 in the sliding groove 504, the connecting rod 502 hinged on the pulley 505 is synchronously driven. At this time, the connecting rod 502 is affected by the displacement change brought by the pulley 505 on the one hand, and on the other hand, its movement is constrained by the limiting rod 506 and the fixing plate 508, and can only move in the vertical direction;

[0069] The second spring 507 sleeved on the connecting rod 502 is in a compressed state in the initial state. As the connecting rod 502 moves, the second spring 507 will use its stored elastic potential energy to push the connecting rod 502 toward the film direction, thereby driving the two sets of half-pressing rings 501 to move toward the film surface. Finally, the two sets of half-pressing rings 501 are tightly pressed against the film surface under the action of the second spring 507, preliminarily fixing the smoothed film, and at the same time, the two sets of pressing rollers 311 are in a state of being away from the film.

[0070] In this process, the compression and extension characteristics of the second spring 507 play a key power and buffering role. It can provide enough power to ensure that the half pressure ring 501 presses the rubber film tightly, and prevent the rubber film from wrinkling again due to the loss of the pressure of the pressure roller 311.

[0071] Embodiment 4:

[0072] The above solution solves the problem that after the two groups of half-pressure rings 501 preliminarily fix the smoothed film, the film is prevented from wrinkling again. However, since the distance between the two groups of half-pressure rings 501 and the pressure head 105 is relatively close, after the film is smoothed by the pressure roller 311 and then preliminarily pressed by the half-pressure rings 501, the space between them is limited. In actual operation, the space left for the operator to place the sample of the pharmaceutical packaging material on the film becomes very narrow. When the operator places the sample, the operating space of the arm or the placing tool is limited, and it is difficult to smoothly place the sample of the pharmaceutical packaging material on the film.

[0073] like Figure 5-Figure 6 As shown, different from the above-mentioned embodiment, the two ends of the pressing roller 311 are fixedly connected to the movable rod 307 in a manner changed to being rotatably connected to the movable rod 307, and a feeding mechanism 4 is installed on the pressing roller 311, and the feeding mechanism 4 includes a discharge plate 401 fixedly installed on two groups of pressing rollers 311, wherein the two ends of one group of discharge plates 401 have through openings, and in the initial state, the two groups of discharge plates 401 are close to each other and fit each other to form a relatively closed space;

[0074] The through opening of one set of discharge plates 401 is the entrance for placing the sample of the pharmaceutical packaging material. The operator can use this through opening to accurately place the sample of the pharmaceutical packaging material between the two sets of discharge plates 401. The discharge plates 401 provide the initial placement position and a certain limit for the sample of the pharmaceutical packaging material to avoid unnecessary displacement or shaking of the sample before the device is started, ensuring that it is in a stable state to be tested;

[0075] Meanwhile, a second gear 402 is fixedly mounted on one end of the pressure roller 311, and a second rack 403 is fixedly mounted on the support plate 309, and the second rack 403 has second meshing teeth;

[0076] As the cylinder 104 is started, the output end moves downward, and at this time, the first gear 305 gradually engages and rotates with the first meshing tooth on the first rack 313. As the first gear 305 at one end of the screw rod 304 starts to rotate, the two groups of connecting rods 306 move away from each other under the drive of the screw rod 304, so as to drive the two groups of pressure rollers 311 to move away from each other, and start to smooth and remove wrinkles on the film. At the same time, the two groups of pressure rollers 311 move away from each other, which drives the two groups of unloading plates 401 to move away from each other, so as to unload the medicine packaging samples placed on the two groups of unloading plates 401.

[0077] When the first gear 305 passes over the position of the first meshing tooth on the first rack 313, the two sets of rollers 311 still maintain the smoothing effect on the film, but have shown a trend of gradually moving away from the film. At this time, the movable rod 307 will continue to drive the connecting member 509, and the connecting member 509 will further drive the slide plate 503 to move;

[0078] As the slide plate 503 moves, the pulley 505 installed between the sliding grooves 504 will gradually slide from the first sliding groove to the second sliding groove. Due to the change in the position of the pulley 505 in the sliding groove 504, the connecting rod 502 hinged on the pulley 505 is synchronously driven. At this time, the connecting rod 502 is affected by the displacement change caused by the sliding of the pulley 505 on the one hand, and on the other hand, its movement is constrained by the limiting rod 506 and the fixing plate 508, and can only move in the vertical direction;

[0079] The second spring 507 sleeved on the connecting rod 502 is in a compressed state in the initial state. As the connecting rod 502 moves, the second spring 507 pushes the connecting rod 502 to move toward the film, thereby driving the two sets of half-pressure rings 501 to move toward the surface of the film. Finally, the two sets of half-pressure rings 501 are tightly pressed against the surface of the film under the action of the second spring 507, preliminarily fixing the smoothed film.

[0080] As the cylinder 104 continues to move, the two sets of pressure rollers 311 are now away from the film, and the pressure rollers 311 will synchronously drive the slide plate 503 to move, so that the pulley 505 slides from the inclined slide groove 504 to the horizontal slide groove 504 at the lower end again;

[0081] At the same time, the second gear 402 gradually approaches the second meshing tooth area on the second rack 403 and gradually meshes. The rotation of the second gear 402 on the second meshing tooth will drive the pressure roller 311 to rotate around its axis. The rotation of the pressure roller 311 will be further transmitted to the discharge plate 401 connected thereto, so that the discharge plate 401 rotates with a concentrated downward trend, and through the rotation of the discharge plate 401, the drug packaging material sample placed on the discharge plate 401 is guided so that it is accurately placed on the film, ensuring that the drug packaging material sample is well attached to the film, and laying an accurate foundation for subsequent burst resistance testing and other operations;

[0082] At this time, as the output end of the cylinder 104 continues to move downward, since the two groups of pressure rollers 311 and the two groups of discharge plates 401 are fixedly installed together, the two groups of pressure rollers 311 synchronously drive the two groups of discharge plates 401 to move away from each other to a position where they do not affect the pressure head 105 from pressing the pharmaceutical packaging material sample. At this time, as the pressure head 105 gradually approaches the pharmaceutical packaging material sample, the pharmaceutical packaging material sample is pressed against the film, and the pharmaceutical packaging material and the film are simultaneously pressed against the upper chuck 108.

[0083] In summary, the flattening mechanism 3 can be used to smoothen and remove wrinkles on the film, so that the film is as flat as possible before placing the pharmaceutical packaging material sample. The subsequent half-pressure ring 501 preliminarily fixes the smoothed film under the action of the second spring 507, further preventing the pressure roller 311 from passing over the film, so that the film returns to its initial state with wrinkles. At the same time, through the design of the discharge plate 401 in the feeding mechanism 4, a stable initial placement position and limit are first provided for the pharmaceutical packaging material sample to avoid displacement or shaking of the sample before the device is started. Afterwards, with the linkage of the various components of the device, the discharge plate 401 realizes unloading by moving away from each other, and with the help of the rotation of the pressure roller 311 to drive the discharge plate 401 to rotate, the pharmaceutical packaging material sample can be accurately guided and placed on the film, ensuring that the sample and the film are well fitted;

[0084] In addition, the unwinding unit and the rewinding unit in the unwinding mechanism 2 work in coordination. Driven by the motor, the unwinding roller 201 can quickly and stably provide new film for each inspection, and the rewinding roller 202 can promptly recycle the used film, thereby realizing the reasonable circulation of the film in the device, avoiding the tedious operation of frequent manual replacement of the film, reducing the pause time in the inspection process, allowing the entire inspection work to continue uninterruptedly, and effectively improving the inspection efficiency.

[0085] At the same time, the problem that the operating space may be limited due to the close distance between the half pressure ring 501 and the pressure head 105 is solved, but through the ingenious design of the feeding mechanism 4, the problem of placing the sample of the pharmaceutical packaging material is solved, and the movement of each component of the whole device is smoothly connected during operation. The operator only needs to start the power components such as the cylinder 104 according to the established process, and the device can automatically complete a series of operations such as film processing, sample placement, clamping and fixing, which reduces the difficulty of operation and improves the convenience of operation.

[0086] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A bursting strength testing device for pharmaceutical packaging materials, characterized in that: include: A base (1), a support base (102) being mounted on the base (1), the support base (102) having a protruding portion, a cylinder (104) being mounted on the protruding portion, and a pressure head (105) being mounted on the output end of the cylinder (104); An unwinding unit, the unwinding unit being mounted on the base (1), the unwinding unit comprising an unwinding roller (201) and two sets of placement brackets, the unwinding roller (201) rotating between the two sets of placement brackets, a film being wound on the unwinding roller (201), and a motor being mounted on the side of one set of the placement brackets; A reeling unit, the reeling unit being mounted on the base (1), the reeling unit and the unreeling unit having a similar structure; A mounting plate (301) is mounted on the output end of the cylinder (104). Two groups of moving units are mounted on the mounting plate (301). The moving units include: A slide plate (302), the slide plate (302) being mounted on the mounting plate (301), and fixed seats (303) being mounted at both ends of the slide plate (302); A screw rod (304), the screw rod (304) bearing being connected between the two groups of the fixing seats (303), the two ends of the screw rod (304) being arranged to pass through the fixing seats (303), the screw rod (304) being provided with two groups of spiral grooves with opposite rotation directions, the two groups of spiral grooves being respectively connected to connecting rods (306) in a transmission manner, and the connecting rods (306) being slidably connected to the bottom of the sliding seat plate (302); A movable rod (307), the movable rod (307) being slidably mounted on one end of the connecting rod (306), a limiting groove (308) being provided on a side surface of the connecting rod (306), a side protrusion being mounted on the movable rod (307), a connecting plate (315) being movably sleeved on one end of the movable rod (307), a groove being provided on the connecting plate (315), one end of the movable rod (307) extending into the groove, through grooves (316) being provided on both sides of the connecting plate (315), the through grooves (316) being connected to the grooves, a pressure roller (311) being mounted between two groups of the connecting plates (315), the pressure roller (311) being arranged to penetrate the through grooves (316), and a first spring being arranged between the side protrusion and the top end of the inner wall of the limiting groove (308); a first gear (305), the first gear (305) being mounted on one end of the screw rod (304), the protruding portion being mounted with a first rack (313), the first rack (313) being composed of a first meshing tooth at a lower end and a first smooth section (314) at an upper end; The first gear (305) is initially located at the position of the first smooth section (314); Two groups of support plates (309) are installed on the base (1), and slide rails (310) are installed on the support plates (309). One end of the movable rods (307) of the two groups of movable units is provided with a sliding groove adapted to the slide rail (310), and the movable rods (307) slide linearly on the slide rail (310) through the sliding groove; A clamping mechanism (5) is installed on the side of the support plate (309), and the clamping mechanism (5) includes a support platform installed on the side of the support plate (309), and two sets of slide plates (503) arranged opposite to each other are placed on the support platform, and sliding grooves (504) are opened on both sides of the slide plate (503), and the sliding grooves (504) present a three-section structure, which are composed of a first slide groove at a higher position, a second slide groove inclined downward in the middle, and another third slide groove at a lower position connected in sequence, and a pulley (505) is connected and installed between the slide grooves (504) on both sides, and the pulley (505) is initially located in the first slide groove; A connecting rod (502) is hinged on the pulley (505), and the connecting rod (502) is a horizontal section. The horizontal section of the connecting rod (502) movably passes through the movable rod (307). The movable rod (307) is provided with an open groove. A half pressure ring (501) is installed between two groups of the connecting rods (502). The two groups of the half pressure rings (501) are butt-jointed to form a ring structure. A limiting rod (506) is installed at the upper end of the horizontal section of the connecting rod (502), and a fixing plate (508) is installed on the protruding portion. The limiting rod (506) is movable and passes through the fixing plate (508). A second spring (507) is sleeved on the limiting rod (506), one end of the second spring (507) is fixedly connected to the connecting rod (502), and the other end of the second spring (507) is fixedly connected to the bottom surface of the fixing plate (508). The second spring (507) is in a compressed state in the initial state, and a connecting piece (509) is installed on the side of the movable rod (307), and one end of the connecting piece (509) is fixedly connected to the slide plate (503).

2. A bursting strength testing device for pharmaceutical packaging materials according to claim 1, characterized in that: The two groups of half-pressure rings (501) are butt-jointed to form an annular structure located directly above the pressure roller (311), and a certain gap is provided between the two groups of half-pressure rings (501) and the pressure roller (311).

3. A bursting strength testing device for pharmaceutical packaging materials according to claim 2, characterized in that: The two ends of the pressing roller (311) are rotatably connected to the movable rod (307), and a feeding mechanism (4) is installed on the pressing roller (311). The feeding mechanism (4) comprises discharge plates (401) installed on two groups of the pressing rollers (311). Both ends of one group of the discharge plates (401) have through openings. In an initial state, the two groups of the discharge plates (401) are close to each other and fit together to form a relatively closed space.

4. A bursting strength testing device for pharmaceutical packaging materials according to claim 3, characterized in that: A second gear (402) is installed at one end of the pressure roller (311), and a second rack (403) is installed on the support plate (309), wherein the second rack (403) has second meshing teeth.

5. A bursting strength testing device for pharmaceutical packaging materials according to claim 4, characterized in that: A shield (312) is installed on the support platform.

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