Device for decoloration test of food contact material
By designing an adjustable height and width clamp and push rod structure, the problem of insufficient adaptability of existing devices to samples of different sizes and materials is solved, thereby improving stability and adaptability and meeting a variety of testing needs.
Patent Information
- Application Number
- CN202520348102.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-03
- Publication Date
- 2026-02-03
- Estimated Expiration
- 2035-03-03
AI Technical Summary
Existing food contact material decolorization testing equipment is difficult to adapt to samples of different sizes and materials, resulting in insufficient experimental stability and adaptability.
A device was designed that includes a base, a sample platform, a clamp, a motor drive, a push rod, a cotton swab holder, and adjustable weights. The device achieves stable fixation of different samples through the adjustable height and width clamp and push rod structure, and the wiping action of the cotton swab is achieved by the motor drive.
It achieves stable fixation of samples of different sizes and materials, improves the stability and adaptability of experiments, meets various testing requirements, and has a simple structure that is easy to assemble.
Smart Images
Figure CN223870511U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a device for testing the decolorization of food contact materials, belonging to the field of food contact material testing technology. Background Technology
[0002] Food contact materials refer to materials that come into direct or indirect contact with food during normal use, such as food packaging, tableware, kitchen utensils, and food processing machinery. To ensure the safety of food contact materials, various countries have introduced a series of regulations and standards. In recent years, my country has gradually established a comprehensive food contact material standard system consisting of four parts: general standards, additive and product standards, testing methods, and general hygiene specifications for production.
[0003] In September 2023, the National Health Commission of China issued GB31604.7-2023, "National Food Safety Standard: Decolorization Test for Food Contact Materials and Articles," which sets higher standards for the testing process. Based on this standard, this invention designs a standardized and automated testing device. Utility Model Content
[0004] This invention provides a device for testing the decolorization of food contact materials, which can adjust the height and width according to the size of the sample to meet the testing needs of samples of various sizes and film samples.
[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:
[0006] A device for testing the decolorization of food contact materials includes a base, a sample platform, a first clamp, a second clamp, a first motor drive device, a push rod, a degreased cotton clamp, a weight plate, adjustable weights, and a second motor drive device.
[0007] The sample platform is located on the base, and the first clamp is located on the sample platform; the second clamp is located directly above the first clamp, and the second clamp is connected to the first motor drive device and can be adjusted in height under the drive of the first motor drive device.
[0008] The push rod has an adjustable length structure, is vertically set and located directly above the second clamp, with the top of the push rod connected to the load-bearing plate and the bottom connected to the degreased cotton clamp; the adjustable weight is movably placed on the load-bearing plate, and the weight of the adjustable weight is adjustable; the side wall of the push rod is connected to the second motor drive device and can swing left and right under the drive of the second motor drive device.
[0009] The aforementioned base is used to support the sample platform; the sample platform is used to place the sample.
[0010] The first clamp is used to secure soft packaging materials such as bags or films, or rigid packaging with a small thickness (e.g., ≤5mm), and is also used for positioning rigid packaging of other thicknesses. The second clamp is used for intermediate positioning of packaging with a certain height (e.g., ≥10cm) to prevent tipping during the test and improve experimental stability.
[0011] The second clamp can be height adjusted under the drive of the first motor drive device to accommodate samples of different heights and prevent sample displacement or tipping during testing.
[0012] The aforementioned absorbent cotton holder is used to clamp absorbent cotton for testing. The push rod is of adjustable length, used to adjust the distance between the absorbent cotton holder and the sample to be tested.
[0013] In use, when the sample to be tested is in soft packaging such as a bag or film, or in rigid packaging with a small thickness, the first clamp is used to press and fix the sample. When the sample to be tested is in rigid packaging with a certain height (e.g., greater than 5mm), the first clamp is used to lock and fix the sample. If the rigid packaging is very tall (e.g., ≥10cm), the second clamp is used to hold the sample at the middle or upper middle to prevent it from shifting or tipping over during testing. After the sample is fixed, the absorbent cotton is clamped at the end of the absorbent cotton holder. The length of the push rod is adjusted so that the absorbent cotton contacts the test surface of the sample. Then, according to the test requirements, the weight of the adjustable weight is adjusted, and the second motor drive is started. The push rod swings left and right under the drive of the second motor drive, which in turn causes the absorbent cotton to swing left and right to wipe the test surface of the sample.
[0014] The weight of the aforementioned adjustable weights is adjustable, allowing for adjustments to the test load according to different test requirements.
[0015] The second clamp is adjusted in height (up and down) under the drive of the first motor drive device, and the push rod swings left and right under the drive of the second motor drive device. Both are linear movements driven by the motor drive device. This can be achieved by crank-connecting rod mechanism, cam mechanism, lead screw and nut mechanism, gear and rack mechanism, etc., or by directly using linear motor drive. These are all mature existing technologies, and will not be elaborated here.
[0016] The first motor drive unit, the second motor drive unit, and the related components required for their operation can be installed on a suitable mounting platform (such as a cabinet or wall) depending on the site conditions.
[0017] For ease of manufacture and use, the first clamp includes a vertical bar, a horizontal bar, a fixing bolt, and a fixing nut;
[0018] There are two vertical rods, which are set opposite to each other and parallel to each other. Each vertical rod is connected to the sample platform by a support at both ends. Each vertical rod is provided with a rectangular or waist-shaped through hole that is set along the length direction and penetrates the upper and lower surfaces of the vertical rod. That is, the rectangular or waist-shaped through hole penetrates the upper and lower surfaces of the vertical rod, and its depth direction is consistent with the vertical direction.
[0019] There are two crossbars, each with overlapping lugs at both ends, making each crossbar form an inverted U-shape. Each overlapping lug has a threaded through hole. The two crossbars are arranged opposite each other and parallel to each other. The overlapping lugs at both ends of each crossbar are respectively located on the two vertical bars, and the threaded through holes on each overlapping lug are directly opposite the rectangular or oblong through holes on the vertical bars. There are four fixing bolts and four fixing nuts, each corresponding to one of the overlapping lugs on the two crossbars. Each fixing bolt passes through the threaded through hole on the corresponding overlapping lug and the rectangular or oblong through hole on the vertical bar and is fixed by the fixing nut, thus connecting the two crossbars to the two vertical bars. At this time, the bottoms of the two crossbars are tightly attached to the sample platform.
[0020] Each crossbar has overlapping lugs at both ends, giving it an inverted U-shape. Loosening the fixing nuts and lifting the crossbar creates operating space between its bottom and the sample platform, facilitating the pressing of bag-shaped samples. Loosening the nuts also allows adjustment of the crossbar along the length of the rectangular or oblong through-hole. Tightening the nuts fixes the crossbar in place, ensuring its bottom is firmly against the sample platform. The crossbar can be detached from the vertical bar after the fixing nuts are removed.
[0021] When the sample to be tested is a soft package such as a bag or film, or a hard package with a small thickness, loosen the fixing nuts and adjust the position of each crossbar along the length of the rectangular or oblong through hole as needed, so that the degreased cotton holder is in the position to be tested on the sample. Press the two sides of the sample to be tested against the bottom of the two crossbars respectively. After the position is adjusted properly, tighten the fixing nuts to press the sample to be tested tightly onto the sample platform.
[0022] When the sample to be tested is a rigid package with a certain height, loosen the fixing nuts and adjust the position of each crossbar along the length of the rectangular or oblong through hole as needed, so that the degreased cotton holder is positioned directly above the test position of the sample and the sample is clamped between the two crossbars.
[0023] To further improve the stability of the sample being fixed, an elastic layer is provided at the bottom of both crossbars.
[0024] For ease of adjustment and use, the second gripper includes a first constraint side, a second constraint side, a third constraint side, and a fourth constraint side. The first, second, and third constraint sides are connected end-to-end to form a U-shape. One end of the fourth constraint side is hinged to one end of the U-shape, and the other end is movably connected to the other end of the U-shape (e.g., through a matching groove-protrusion structure), forming a square frame structure, which facilitates the insertion and removal of the sample to be tested. The first, second, third, and fourth constraint sides are all length-extendable structures, allowing for adaptive adjustment of the length of each constraint side according to the sample shape, which is simple and convenient. The length-extendable structure of each side of the second gripper can be referenced from the telescopic structure of existing selfie sticks, etc.
[0025] For ease of manufacturing and installation, one specific implementation includes a first motor drive device comprising a drive sprocket, a driven sprocket, a chain, a first motor, and a first connecting rod. The driven sprocket is positioned directly above the drive sprocket, and the chain is simultaneously connected to both the drive and driven sprockets. The first motor is connected to the drive sprocket and drives it to rotate forward and backward. A second gripper is connected to the chain between the drive and driven sprockets via the first connecting rod. The first motor drives the drive sprocket to rotate forward and backward, thereby causing the second gripper to move up and down, thus adjusting the height of the second gripper.
[0026] The first connecting rod can be connected to the second clamp and the chain in the following way: sleeves are provided on the second clamp and the chain respectively, and threads or other plug-in structures are provided on the sleeves. At the same time, structures matching the threads or other plug-in structures on the sleeves are provided at both ends of the first connecting rod, and the two ends of the first connecting rod are respectively matched and connected to the sleeves of the second clamp and the chain.
[0027] For ease of manufacturing and installation, one specific implementation includes a second motor drive device comprising a second motor, a crank, a connecting rod, a slider, a linear track, and a second connecting rod. One end of the crank is connected to the shaft of the second motor, and the crank rotates under the drive of the second motor. The other end of the crank is hinged to one end of the connecting rod. The other end of the connecting rod is hinged to the slider, which slides on the linear track, which is horizontally positioned. The push rod is connected to the slider via the second connecting rod. During operation, the crank rotates under the drive of the second motor, causing the slider to reciprocate linearly on the linear track via the connecting rod, which in turn causes the push rod to swing left and right via the second connecting rod.
[0028] The second connecting rod can be connected to the push rod and the slider in the following way: sleeves are provided on the push rod and the slider respectively, and threads or other plug-in structures are provided on the sleeves. At the same time, structures matching the threads or other plug-in structures on the sleeves are provided at both ends of the second connecting rod, and the two ends of the second connecting rod are respectively matched and connected to the sleeves of the push rod and the slider.
[0029] To protect the motor drive unit, related components, and circuit structure, a mounting cabinet is also included. The mounting cabinet has a partition dividing the interior into an upper and lower cavity. The first motor drive unit is installed in the lower cavity, and the second motor drive unit is installed in the upper cavity. A through hole needs to be provided on the side wall of the mounting cabinet for the vertical movement of the first connecting rod.
[0030] To improve adaptability, the sample platform is height-adjustable. This allows for adjustment of the distance between the absorbent cotton holder and the sample to be tested by combining the adjustment of the push rod length and the adjustment of the sample platform height, thereby improving the adaptability of the device.
[0031] To ensure stability during use, the push rod can be length-adjustable using a cylinder or hydraulic cylinder structure; alternatively, it can employ a multi-cylinder sleeve with bolt-fixed adjustment structure. For example, the push rod includes a first sleeve, a second sleeve, and a third sleeve, each with two or more threaded holes along its length. One end of the second sleeve is located inside the first sleeve and is fixed by a bolt passing through both threaded holes, while the other end of the second sleeve is located outside the third sleeve and is fixed by a bolt passing through both threaded holes.
[0032] The height-adjustable structure of the sample platform can adopt a scissor lift structure or an adjustment structure similar to that of existing height-adjustable desks.
[0033] As one specific implementation method, the bottom of the above-mentioned cotton grease holder is a pneumatic clamp structure with a silicone layer around the clamp. The design is similar to that of a human hand to improve the stability of the cotton grease holder and avoid hard scratching of the surface of the sample to be tested.
[0034] For ease of use and adjustment, the adjustable weights include two or more hollow cylindrical weights with different diameters. The smaller diameter weight is nested inside the larger diameter weight, forming a ring-to-ring structure.
[0035] To facilitate disassembly and use, and to improve stability, the load-bearing plate has a threaded hole in the center, and the push rod has an external thread at the top. The load-bearing plate is threaded onto the top of the push rod through the central threaded hole, and the top end of the push rod extends beyond the load-bearing plate. Adjustable weights are movably placed on the load-bearing plate and are fitted around the top of the push rod.
[0036] Any technologies not mentioned in this utility model are based on existing technologies.
[0037] This utility model is a device for testing the decolorization of food contact materials. It is suitable for testing soft packaging materials such as bags or films, as well as rigid packaging of different heights. The height and width can be adjusted according to the size of the sample to meet the testing needs of different sizes and materials. It has strong adaptability, good stability, simple structure and is easy to assemble. Attached Figure Description
[0038] Figure 1 This is a schematic diagram of the structure of the device for testing the decolorization of food contact materials according to this utility model;
[0039] Figure 2 This is a top view of the first clamp of this utility model;
[0040] Figure 3 for Figure 2 The left view;
[0041] Figure 4 This is a top view of the second clamp of this utility model;
[0042] Figure 5 This is a schematic diagram of the structure of the first motor drive device of this utility model;
[0043] Figure 6 This is a top view of the adjustable weights of this utility model;
[0044] Figure 7 This is a schematic diagram of the structure of the second motor drive device of this utility model;
[0045] In the diagram, 1 is the base, 2 is the sample platform, 3 is the first clamp, 31 is the vertical rod, 311 is the rectangular through hole, 312 is the support leg, 32 is the horizontal rod, 321 is the overlapping lug, 322 is the elastic layer, 33 is the fixing bolt, 34 is the fixing nut, 4 is the second clamp, 41 is the first constraint edge, 42 is the second constraint edge, 43 is the third constraint edge, 44 is the fourth constraint edge, 5 is the first motor drive device, 51 is the driving sprocket, 52 is the driven sprocket, 53 is the chain, 54 is the first motor, 55 is the first connecting rod, 6 is the push rod, 7 is the degreased cotton clamp, 8 is the load-bearing plate, 9 is the adjustable weight, 10 is the second motor drive device, 101 is the second motor, 102 is the crank, 103 is the connecting rod, 104 is the slider, 105 is the linear track, 106 is the second connecting rod, and 11 is the mounting cabinet. Detailed Implementation
[0046] To better understand this utility model, the following embodiments further illustrate the content of this utility model, but the content of this utility model is not limited to the following embodiments.
[0047] The directional terms used in this application, such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," are based on the orientation or positional relationship shown in Figure 1 or in the usage state, and are used only for the convenience of describing this application. They are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting this application. The figures in this application are only structural schematic diagrams; for details not specifically shown, refer to the prior art.
[0048] Example 1
[0049] like Figure 1 As shown, a device for testing the decolorization of food contact materials includes a base, a sample platform, a first clamp, a second clamp, a first motor drive device, a push rod, a degreased cotton clamp, a weight plate, adjustable weights, and a second motor drive device.
[0050] The sample platform is located on the base, and the first clamp is located on the sample platform; the second clamp is located directly above the first clamp, and the second clamp is connected to the first motor drive device and can be adjusted in height under the drive of the first motor drive device.
[0051] The push rod has an adjustable length structure, is vertically set and located directly above the second clamp, with the top of the push rod connected to the load-bearing plate and the bottom connected to the degreased cotton clamp; the adjustable weight is movably placed on the load-bearing plate, and the weight of the adjustable weight is adjustable; the side wall of the push rod is connected to the second motor drive device and can swing left and right under the drive of the second motor drive device.
[0052] In use, when the sample to be tested is in soft packaging such as a bag or film, or in rigid packaging with a small thickness, the first clamp is used to press and fix the sample. When the sample to be tested is in rigid packaging with a certain height (e.g., greater than 5mm), the first clamp is used to lock and fix the sample. If the rigid packaging is very tall (e.g., ≥10cm), the second clamp is used to hold the sample at the middle or upper middle to prevent it from shifting or tipping over during testing. After the sample is fixed, the absorbent cotton is clamped at the end of the absorbent cotton holder. The length of the push rod is adjusted so that the absorbent cotton contacts the test surface of the sample. Then, according to the test requirements, the weight of the adjustable weight is adjusted, and the second motor drive is started. The push rod swings left and right under the drive of the second motor drive, which in turn causes the absorbent cotton to swing left and right to wipe the test surface of the sample.
[0053] Example 2
[0054] Based on Example 1, the following improvements were made: Figure 2-3 As shown, for ease of manufacturing and use, the first clamp includes a vertical rod, a horizontal rod, a fixing bolt, and a fixing nut. There are two vertical rods, arranged opposite each other and parallel to each other, and each vertical rod is connected to the sample platform via supports at both ends. Each vertical rod has a rectangular or oblong through-hole extending along its length and penetrating both the upper and lower surfaces of the vertical rod; that is, the rectangular or oblong through-hole penetrates both the upper and lower surfaces of the vertical rod, and its depth direction is consistent with the vertical direction. There are also two horizontal rods, each with overlapping lugs at both ends, making each horizontal rod have an inverted U-shape. Each lap lug is provided with a threaded through hole; the two horizontal bars are arranged opposite each other and parallel to each other, and the lap lugs at both ends of each horizontal bar are respectively provided on the two vertical bars, and the threaded through hole on each lap lug is directly opposite the rectangular through hole or waist-shaped through hole on the vertical bar; there are four fixing bolts and four fixing nuts, which correspond one-to-one with the lap lugs on the two horizontal bars. Each fixing bolt passes through the threaded through hole on the corresponding lap lug and the rectangular through hole or waist-shaped through hole on the vertical bar and is fixed by the fixing nut, thereby connecting the two horizontal bars to the two vertical bars. At this time, the bottom of the two horizontal bars are tightly attached to the sample platform.
[0055] When the sample to be tested is a soft package such as a bag or film, or a rigid package with a small thickness, loosen the fixing nuts and adjust the position of each crossbar along the length of the rectangular or oblong through-hole as needed. Position the cotton swab holder directly over the sample, pressing both sides of the sample against the bottom of the two crossbars. After adjusting the position, tighten the fixing nuts to firmly press the sample onto the sample platform. When the sample to be tested is a rigid package with a certain height, loosen the fixing nuts and adjust the position of each crossbar along the length of the rectangular or oblong through-hole as needed. Position the cotton swab holder directly over the sample, clamping the sample between the two crossbars.
[0056] Example 3
[0057] Based on Example 2, the following improvements were made: In order to further improve the stability of the sample to be tested, an elastic layer was provided at the bottom of both crossbars.
[0058] Example 4
[0059] Based on Example 3, the following improvements were further made: Figure 4As shown, for ease of adjustment and use, the second clamp includes a first constraint side, a second constraint side, a third constraint side, and a fourth constraint side. The first, second, and third constraint sides are connected end-to-end to form a U-shape. One end of the fourth constraint side is hinged to one end of the U-shape, and the other end is movably connected to the other end of the U-shape (e.g., through a matching groove-protrusion structure), forming a square frame structure, which facilitates the insertion and removal of the sample to be tested. The first, second, third, and fourth constraint sides are all length-extendable structures, allowing for adaptive adjustment of the length of each constraint side according to the sample shape, which is simple and convenient. The length-extendable structure of each side of the second clamp can refer to the telescopic structure of existing selfie sticks, etc.
[0060] Example 5
[0061] Based on Example 4, the following improvements were made: Figure 5 As shown, for ease of manufacturing and installation, in one specific implementation, the first motor drive device includes a driving sprocket, a driven sprocket, a chain, a first motor, and a first connecting rod. The driven sprocket is positioned directly above the driving sprocket, and the chain is simultaneously connected to both the driving and driven sprockets. The first motor is connected to the driving sprocket and drives it to rotate forward and backward. The second gripper is connected to the chain between the driving and driven sprockets via the first connecting rod. The first motor drives the driving sprocket to rotate forward and backward, thereby causing the second gripper to move up and down, thus adjusting the height of the second gripper.
[0062] The first connecting rod can be connected to the second clamp and the chain in the following way: sleeves are provided on the second clamp and the chain respectively, and threads or other plug-in structures are provided on the sleeves. At the same time, structures matching the threads or other plug-in structures on the sleeves are provided at both ends of the first connecting rod, and the two ends of the first connecting rod are respectively matched and connected to the sleeves of the second clamp and the chain.
[0063] Example 6
[0064] Based on Example 5, the following improvements were further made: Figure 7 As shown, for ease of manufacturing and installation, as one specific implementation, the second motor drive device includes a second motor, a crank, a connecting rod, a slider, a linear track, and a second connecting rod. One end of the crank is connected to the shaft of the second motor, and the crank rotates under the drive of the second motor. The other end of the crank is hinged to one end of the connecting rod. The other end of the connecting rod is hinged to the slider, which slides on the linear track, which is horizontally positioned. The push rod is connected to the slider via the second connecting rod. During operation, the crank rotates under the drive of the second motor, causing the slider to reciprocate linearly on the linear track via the connecting rod, which in turn causes the push rod to swing left and right via the second connecting rod.
[0065] The second connecting rod can be connected to the push rod and the slider in the following way: sleeves are provided on the push rod and the slider respectively, and threads or other plug-in structures are provided on the sleeves. At the same time, structures matching the threads or other plug-in structures on the sleeves are provided at both ends of the second connecting rod, and the two ends of the second connecting rod are respectively matched and connected to the sleeves of the push rod and the slider.
[0066] Example 7
[0067] Based on Example 6, the following improvements were made: Figure 1 As shown, to protect the motor drive unit, related components, and circuit structure, the food contact material decolorization test apparatus also includes a mounting cabinet. The mounting cabinet is equipped with a partition, dividing the interior into an upper cavity and a lower cavity. The first motor drive unit is installed in the lower cavity, with the driving and driven sprockets mounted on the side wall of the lower cavity. The first motor is mounted at the bottom of the lower cavity via a support. The second motor drive unit is installed in the upper cavity, with the second motor mounted at the bottom of the upper cavity via a support. A horizontal partition is installed in the upper cavity, and a linear track is mounted on the horizontal partition. Through holes for the vertical movement of the first connecting rod and for the insertion and connection of the second connecting rod need to be pre-drilled on the side wall of the mounting cabinet.
[0068] Example 8
[0069] Based on Example 7, the following improvements were made: To improve adaptability, the sample platform is height-adjustable; in this example, a scissor-lift structure is used. This facilitates adjusting the distance between the cotton swab holder and the sample to be tested by combining the adjustment of the push rod length and the adjustment of the sample platform height, thereby improving the adaptability of the device. To ensure stability during use, the adjustable push rod length structure can be a cylinder or hydraulic cylinder structure; alternatively, a multi-cylinder sleeved adjustment structure fixed with bolts can be used. For example, the push rod includes a first sleeve, a second sleeve, and a third sleeve. Each of the first, second, and third sleeves has two or more threaded holes along its length. One end of the second sleeve is located inside the first sleeve and is fixed by a bolt passing through both threaded holes. The other end of the second sleeve is located outside the third sleeve and is fixed by a bolt passing through both threaded holes. Alternatively, the push rod includes a first sleeve, a second sleeve, and a third sleeve. A threaded hole is provided at the bottom of the first sleeve and the bottom of the second sleeve, respectively. The top of the second sleeve is located inside the bottom of the first sleeve and is fixed to the side wall of the second sleeve by the end of a bolt that is simultaneously threaded into the threaded hole at the bottom of the first sleeve. The bottom of the second sleeve is located outside the third sleeve and is fixed to the side wall of the third sleeve by the end of a bolt that is simultaneously threaded into the threaded hole at the bottom of the second sleeve.
[0070] Example 9
[0071] Based on Example 8, the following improvements were made: the bottom of the cotton swab holder is a pneumatic clamp structure, and a silicone layer is provided around the clamp, mimicking a human hand design to improve the stability of the cotton swab holder while avoiding hard scratches on the surface of the sample to be tested. Figure 6 As shown, for ease of use and adjustment, the adjustable weights include two or more hollow cylindrical weights of different diameters. The smaller diameter weight is nested inside the larger diameter weight, forming a ring-like structure. For ease of assembly and disassembly, and to improve stability, a threaded hole is located in the center of the load-bearing plate, and an external thread is located at the top of the push rod. The load-bearing plate is threaded through the central threaded hole onto the top of the push rod, with the top end of the push rod extending beyond the load-bearing plate. The adjustable weights are movably placed on the load-bearing plate and nestled around the top of the push rod.
[0072] The above-mentioned food contact material decolorization test devices are suitable for testing soft packaging materials such as bags or films, as well as rigid packaging of different heights. They can be adjusted in height and width according to the size of the sample to meet the testing needs of different sizes and materials. They are highly adaptable, stable, simple in structure, and easy to assemble.
Claims
1. A device for testing the decolorization of food contact materials, characterized in that: It includes a base (1), a sample platform (2), a first clamp (3), a second clamp (4), a first motor (54) drive device (5), a push rod (6), a degreased cotton clamp (7), a load-bearing plate (8), an adjustable weight (9), and a second motor (101) drive device (10). The sample platform (2) is located on the base (1), and the first clamp (3) is located on the sample platform (2); the second clamp (4) is located directly above the first clamp (3), and the second clamp (4) is connected to the first motor (54) drive device (5) and can be height adjusted under the drive of the first motor (54) drive device (5); The push rod (6) has an adjustable length structure. The push rod (6) is vertically set and located directly above the second clamp (4). The top of the push rod (6) is connected to the load-bearing plate (8) and the bottom is connected to the degreased cotton clamp (7). The adjustable weight (9) is movably placed on the load-bearing plate (8) and the weight of the adjustable weight (9) is adjustable. The side wall of the push rod (6) is connected to the second motor (101) drive device (10) and can swing left and right under the drive of the second motor (101) drive device (10).
2. The apparatus for testing the decolorization of food contact materials according to claim 1, characterized in that: The first clamp (3) includes a vertical bar (31), a horizontal bar (32), a fixing bolt (33), and a fixing nut (34); There are two vertical rods (31), which are arranged opposite to each other and parallel to each other. Each vertical rod (31) is connected to the sample platform (2) through the support legs (312) at both ends. Each vertical rod (31) is provided with a rectangular or waist-shaped through hole that is arranged along the length direction and penetrates the upper and lower surfaces of the vertical rod (31). There are two crossbars (32), each with a connecting lug (321) at both ends, making each crossbar (32) have an inverted U-shape. Each connecting lug (321) has a threaded through hole. The two crossbars (32) are arranged opposite to each other and parallel to each other. The connecting lugs (321) at both ends of each crossbar (32) are respectively located on the two vertical bars (31), and the threaded through holes on each connecting lug (321) are directly opposite the rectangular or oblong through holes on the vertical bars (31). Fixing bolts ( There are four bolts (33) and four fixing nuts (34), which correspond one-to-one with the overlapping ears (321) on the two horizontal bars (32). Each fixing bolt (33) passes through the threaded through hole on the corresponding overlapping ear (321) and the rectangular through hole or waist-shaped through hole on the vertical bar (31) and is fixed by fixing nuts (34), thereby connecting the two horizontal bars (32) to the two vertical bars (31). At this time, the bottom of the two horizontal bars (32) are tightly attached to the sample platform (2).
3. The apparatus for testing the decolorization of food contact materials according to claim 2, characterized in that: Both crossbars (32) have an elastic layer (322) at their bottom.
4. The apparatus for testing the decolorization of food contact materials according to any one of claims 1-3, characterized in that: The second clamp (4) includes a first constraint edge (41), a second constraint edge (42), a third constraint edge (43), and a fourth constraint edge (44); the first constraint edge (41), the second constraint edge (42), and the third constraint edge (43) are connected end to end to form a U-shape; one end of the fourth constraint edge (44) is hinged to one end of the U-shape, and the other end is movably connected to the other end of the U-shape to form a square frame structure; the first constraint edge (41), the second constraint edge (42), the third constraint edge (43), and the fourth constraint edge (44) are all length-extendable structures.
5. The apparatus for testing the decolorization of food contact materials according to any one of claims 1-3, characterized in that: The first motor (54) drive device (5) includes a drive sprocket (51), a driven sprocket (52), a chain (53), a first motor (54), and a first connecting rod (55); the driven sprocket (52) is located directly above the drive sprocket (51), and the chain (53) is simultaneously connected to both the drive sprocket (51) and the driven sprocket (52); the first motor (54) is connected to the drive sprocket (51) and drives the drive sprocket (51) to rotate in both directions; the second clamp (4) is connected to the chain (53) between the drive sprocket (51) and the driven sprocket (52) via the first connecting rod (55).
6. The apparatus for testing the decolorization of food contact materials according to any one of claims 1-3, characterized in that: The second motor (101) drive device (10) includes a second motor (101), a crank (102), a connecting rod (103), a slider (104), a linear track (105), and a second connecting rod (106); one end of the crank (102) is connected to the shaft of the second motor (101), and the crank (102) rotates under the drive of the second motor (101); the other end of the crank (102) is hinged to one end of the connecting rod (103); the other end of the connecting rod (103) is hinged to the slider (104), and the slider (104) slides on the linear track (105), which is horizontally set; the push rod (6) is connected to the slider (104) through the second connecting rod (106).
7. The apparatus for testing the decolorization of food contact materials according to any one of claims 1-3, characterized in that: It also includes an installation cabinet (11), which is equipped with a partition to divide the interior of the installation cabinet (11) into an upper cavity and a lower cavity. The first motor (54) drive device (5) is installed in the lower cavity, and the second motor (101) drive device (10) is installed in the upper cavity.
8. The apparatus for testing the decolorization of food contact materials according to any one of claims 1-3, characterized in that: The sample platform (2) has an adjustable height; the bottom of the cotton grease holder is a pneumatic clamp structure, and the clamp is surrounded by a silicone layer.
9. The apparatus for testing the decolorization of food contact materials according to any one of claims 1-3, characterized in that: The adjustable weight (9) includes two or more hollow cylindrical weights with different diameters. The smaller diameter weight is nested inside the larger diameter weight, forming a ring-to-ring structure.
10. The apparatus for testing the decolorization of food contact materials according to claim 9, characterized in that: The center of the load-bearing plate (8) is provided with a threaded hole, and the top of the push rod (6) is provided with an external thread. The load-bearing plate (8) is threaded through the central threaded hole onto the top of the push rod (6), and the top end of the push rod (6) extends beyond the load-bearing plate (8). The adjustable weight (9) is movably placed on the load-bearing plate (8) and is sleeved around the top of the push rod (6).