Blister disc pull test device

Abstract

The utility model discloses a blister tray tension testing arrangement relates to tension testing arrangement technical field. The utility model discloses a support plate, fixed plate sets up on the support plate for installing the blister tray limiting mould, negative pressure adsorption component sets up on the fixed plate for generating the negative pressure to with the inside of blister tray limiting mould fixedly adsorbed to the blister tray, tension sensor is connected in the output of drive component, clamp is connected in the lower end of tension sensor through a universal joint for the clamping of paperboard tear shooting. The utility model discloses through negative pressure adsorption component generates the negative pressure of uniform distribution, with the inside of limiting mould fixedly adsorbed to the whole blister tray, combines the accurate location of mould cavity, avoids the stress concentration and local deformation caused by mechanical joint, thereby keeps the stable state of blister tray in the testing process, ensures that the tension is strictly vertically applied, and the accuracy and reliability of test result have been improved significantly.

Description

Technical Field

[0001] This utility model relates to the technical field of tensile testing devices, specifically to a tensile testing device for blister trays. Background Technology

[0002] The heat-sealing or fastening strength of the blister pack and the cover material is a key indicator for ensuring the product's sealing, moisture resistance, and safety. Currently, tensile testing machines are commonly used to test its tear strength.

[0003] In current tear strength tests of blister packaging products, mechanical limiting molds are commonly used to fix the blister trays. These molds typically achieve positioning through snap-fit ​​or compression. However, in actual testing, due to the relatively soft material and insufficient structural rigidity of the blister trays, mechanical snap-fit ​​alone cannot provide uniform and sufficient constraint force when subjected to vertical tearing forces. This can easily lead to localized deformation, displacement, or even detachment of the blister tray from the limiting area. This instability not only causes data fluctuations during the test but may also cause the direction of the pulling force to deviate from the preset axis, severely affecting the accuracy and repeatability of the test results and failing to meet the requirements of high-precision quality control.

[0004] Therefore, a tensile testing device for blister packs is proposed. Utility Model Content

[0005] To address the problems existing in the prior art, this utility model provides a blister tray tensile testing device.

[0006] To achieve the above objectives, this utility model specifically adopts the following technical solution: A blister tray tensile testing device includes: Support plate; A fixing plate, disposed on the support plate, is used to install the blister tray limiting mold; A negative pressure adsorption component is disposed on the fixing plate to generate negative pressure to adsorb and fix the blister tray inside the blister tray limiting mold; A driving component, disposed on the support plate, is used to drive the tension sensor and the clamp to move in a direction perpendicular to the surface of the fixed plate, so as to apply tension to the cardboard tear tongue on the blister tray fixed by the negative pressure adsorption component; A tension sensor is connected to the output end of the drive component; The clamp, connected to the lower end of the tension sensor via a universal joint, is used to hold the cardboard tearing action; A driving component, disposed on the support plate, is used to drive the tension sensor and the clamp to move in a direction perpendicular to the surface of the fixed plate, so as to apply tension to the cardboard tear tongue on the blister tray fixed by the negative pressure adsorption component; The controller displays the tensile test values ​​on an external display screen.

[0007] Furthermore, the negative pressure adsorption component includes a vacuum generator and a mounting frame, the mounting frame being fixed to the fixed plate, and the vacuum generator being fixedly mounted on one side of the mounting frame.

[0008] Furthermore, the input end of the vacuum generator is connected to a retractable second connecting tube, which is connected to the first connecting tube via a rotatable connector, and the connector and the first connecting tube are connected by a thread.

[0009] Furthermore, the blister tray limiting mold is detachably fixed to one side of the fixing plate by at least two connecting ear plates and fastening bolts.

[0010] Furthermore, the internal cavity of the blister tray limiting mold is connected to the outside through multiple through holes opened at its bottom, the first connecting tube is connected to the internal cavity of the blister tray limiting mold, and the fixing plate is provided with a through groove for accommodating the first connecting tube or connector.

[0011] Furthermore, the driving component includes a motor, a lead screw, a slider, and a connecting plate; the motor is fixed to the top of the support plate, and its output shaft is connected to the lead screw; the slider and the lead screw form a threaded pair and slide in cooperation with a slide rail fixed to the support plate; the connecting plate is connected to the slider; and the upper end of the tension sensor is fixed below the connecting plate.

[0012] The beneficial effects of this utility model are as follows: This invention generates a uniformly distributed negative pressure through a negative pressure adsorption component, which adsorbs and fixes the entire blister tray inside the limiting mold. Combined with the precise limiting of the mold cavity, it avoids stress concentration and local deformation caused by mechanical clamping, thereby maintaining the stability of the blister tray during the test and ensuring that the tensile force is applied strictly vertically, which significantly improves the accuracy and reliability of the test results. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the limiting mold structure for the blister tray of this utility model; Figure 3 This is a schematic diagram of the negative pressure adsorption component of this utility model; Figure 4 This is one of the schematic diagrams of the driving component and clamping component of this utility model; Figure 5 This is the second schematic diagram of the driving component and clamping component of this utility model.

[0014] Reference numerals: 1. Support plate; 2. Fixing plate; 3. Driving component; 301. Slide rail; 302. Motor; 303. Lead screw; 304. Slider; 305. Connecting plate; 4. Controller; 5. Negative pressure adsorption component; 501. Mounting bracket; 502. First connecting pipe; 503. Vacuum generator; 504. Second connecting pipe; 505. Connector; 6. Blister tray limiting mold; 601. Connecting ear plate; 7. Tension sensor; 8. Fixture. Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0016] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0017] It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0018] In the description of the embodiments of this utility model, it should be noted that the terms "inner", "outer", "upper", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship that the utility model product is usually placed in during use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0019] like Figure 1-5As shown, the blister tray tensile testing device includes: a support plate 1; a fixed plate 2, disposed on the support plate 1, for mounting a blister tray limiting mold 6, the cavity of which matches the shape of the blister tray to be tested, achieving precise positioning and limiting of the blister tray, preventing the blister tray from moving or tilting during the test; a negative pressure adsorption component 5, disposed on the fixed plate 2, for generating negative pressure to adsorb and fix the blister tray inside the blister tray limiting mold 6; a driving component 3, disposed on the support plate 1, for driving a tensile sensor 7 and a clamp 8 to move in a direction perpendicular to the surface of the fixed plate 2, so as to apply tensile force to the cardboard tear tab on the blister tray fixed by the negative pressure adsorption component 5; a tensile sensor 7 connected to the output end of the driving component 3; and a clamp 8, the type of which is diverse and is existing technology, therefore not limited here. A universal joint is connected to the lower end of the tension sensor 7 to clamp the cardboard tear tongue. This universal joint structure can automatically compensate for non-perpendicular forces caused by clamping or product placement deviations, ensuring that the applied tension direction is always perpendicular to the blister tray plane and preventing lateral force components, thereby greatly improving the accuracy and reliability of tension measurement data. The controller 4 displays the tension test values ​​on an external display screen. The controller 4 has a built-in PLC or microcontroller, which not only controls the start, stop, direction and speed of the motor 302, but also receives analog signals from the tension sensor 7 and converts them into digital signals through an internal AD conversion module for processing. The controller 4 has data storage, historical query, test report generation functions such as peak tension, average value, standard deviation, etc., and upper and lower limit alarm setting functions, realizing the automation and intelligence of the testing process.

[0020] like Figure 3 As shown, the negative pressure adsorption component 5 includes a vacuum generator 503 and a mounting bracket 501. The mounting bracket 501 is fixed on the fixed plate 2, and the vacuum generator 503 is fixedly installed on one side of the mounting bracket 501. Specifically, the mounting bracket 501 can be installed on the fixed plate 2 by welding or bolting, which is not limited here.

[0021] like Figure 3 As shown, the input end of the vacuum generator 503 is connected to a retractable second connecting pipe 504. The second connecting pipe 504 is connected to the first connecting pipe 502 through a rotatable connector 505. The connector 505 and the first connecting pipe 502 are connected by a thread. Specifically, the second connecting pipe 504 can be a rigid corrugated pipe, which facilitates the connection of the first connecting pipe 502 to the vacuum generator 503.

[0022] like Figure 2 As shown, the blister tray limiting mold 6 is detachably fixed to one side of the fixing plate 2 by at least two connecting ear plates 601 and fastening bolts; specifically, different blister tray limiting molds 6 can be easily replaced by fastening bolts, which is convenient for adapting to the tear test of different blister trays.

[0023] like Figure 3 As shown, the internal cavity of the blister tray limiting mold 6 is connected to the outside through multiple through holes opened at its bottom. The first connecting pipe 502 is connected to the internal cavity of the blister tray limiting mold 6. The fixing plate 2 is provided with a through groove for accommodating the first connecting pipe 502 or the connector 505. Specifically, the multiple through holes opened at the bottom of the blister tray limiting mold 6 are evenly distributed to ensure that the negative pressure can be evenly applied to the entire bottom surface of the blister tray, avoiding insufficient local adsorption force and causing the blister tray to loosen during the test, thus ensuring the firmness of the adsorption and fixation.

[0024] like Figure 4-5 As shown, the driving component 3 includes a motor 302, a lead screw 303, a slider 304, and a connecting plate 305. The motor 302 is fixed to the top of the support plate 1, and its output shaft is connected to the lead screw 303. The slider 304 and the lead screw 303 form a threaded pair and slide in cooperation with the slide rail 301 fixed on the support plate 1. The connecting plate 305 is connected to the slider 304, and the upper end of the tension sensor 7 is fixed below the connecting plate 305. Specifically, the motor 302 is a servo motor or a stepper motor. This selection ensures high-precision speed and position control during the application of tension, thereby achieving uniform stretching, ensuring the repeatability of test conditions and the accuracy of data. Depending on the thickness of the blister tray limiting mold 6, a horizontal moving component with the same structure as the driving component 3 can also be provided to ensure the consistency of the tension test position.

[0025] In summary: The operator places the blister pack to be tested into the blister pack limiting mold 6 and positions its cardboard tear tab within the clamping opening of the fixture 8. Then, the operator activates the negative pressure adsorption component 5 via the controller 4, and the vacuum generator 503 operates, extracting air from the cavity of the blister pack limiting mold 6 through the first connecting pipe 502. Atmospheric pressure is used to firmly adsorb the blister pack into the blister pack limiting mold 6. The operator manipulates the fixture 8 to clamp the cardboard tear tab. Then, the operator sets test parameters such as stretching speed on the controller 4 and starts the test program. The motor 302 of the drive component 3 starts, driving the lead screw 303 to rotate, causing the slider 304 and connecting plate 305 to smoothly move along the slide rail 301. The device moves upward, thereby applying a vertical and uniform tension to the cardboard tear tongue through the tension sensor 7 and the universal joint. During this process, the tension sensor 7 monitors the tension value in real time and transmits the electrical signal to the controller 4. The data processing unit inside the controller 4 collects, processes and records the signal, and displays key data such as the tension-displacement or tension-time curve and peak tension on the external display screen in real time. When the cardboard tear tongue is completely torn or the tension value drops to the set threshold, the controller 4 automatically controls the motor 302 to stop and reverse, so that the drive component 3 returns to the initial position, the negative pressure adsorption is released, and the operator can take out the sample that has been tested.

[0026] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A blister tray tensile testing device, characterized in that, include: Support plate (1); A fixing plate (2) is set on the support plate (1) and is used to install the blister tray limiting mold (6). A negative pressure adsorption component (5) is disposed on the fixing plate (2) to generate negative pressure to adsorb and fix the blister tray inside the blister tray limiting mold (6); The driving component (3) is disposed on the support plate (1) and is used to drive the tension sensor (7) and the clamp (8) to move in a direction perpendicular to the surface of the fixed plate (2) to apply tension to the cardboard tear tongue on the blister tray fixed by the negative pressure adsorption component (5); A tension sensor (7) is connected to the output end of the drive component (3); The clamp (8) is connected to the lower end of the tension sensor (7) via a universal joint and is used to clamp the cardboard tear tongue; The controller (4) displays the tensile test values ​​on an external display screen.

2. The blister tray tensile testing device according to claim 1, characterized in that, The negative pressure adsorption component (5) includes a vacuum generator (503) and a mounting bracket (501). The mounting bracket (501) is fixed on the fixing plate (2), and the vacuum generator (503) is fixedly installed on one side of the mounting bracket (501).

3. The blister tray tensile testing device according to claim 2, characterized in that, The input end of the vacuum generator (503) is connected to a retractable second connecting pipe (504), which is connected to the first connecting pipe (502) through a rotatable connector (505). The connector (505) and the first connecting pipe (502) are connected by a thread.

4. The blister tray tensile testing device according to claim 1, characterized in that, The blister tray limiting mold (6) is detachably fixed to one side of the fixing plate (2) by at least two connecting ear plates (601) and fastening bolts.

5. The blister tray tensile testing device according to claim 3, characterized in that, The internal cavity of the blister tray limiting mold (6) is connected to the outside through multiple through holes opened at its bottom. The first connecting pipe (502) is connected to the internal cavity of the blister tray limiting mold (6). The fixing plate (2) is provided with a through groove for accommodating the first connecting pipe (502) or the connector (505).

6. The blister tray tensile testing device according to claim 1, characterized in that, The driving component (3) includes a motor (302), a lead screw (303), a slider (304), and a connecting plate (305); the motor (302) is fixed to the top of the support plate (1), and its output shaft is connected to the lead screw (303); the slider (304) and the lead screw (303) form a threaded pair and slide in cooperation with the slide rail (301) fixed on the support plate (1); the connecting plate (305) is connected to the slider (304); and the upper end of the tension sensor (7) is fixed below the connecting plate (305).

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