Automatic wiping device for decoloration test
By designing an automatic wipe device, using mobile modules and pressure sensors to detect the wipe force, the problem of inconsistent wipe force and frequency in plastic material decolorization test is solved, and efficient and accurate automatic decolorization test is achieved.
Patent Information
- Application Number
- CN202422769764.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-13
- Publication Date
- 2025-08-26
- Estimated Expiration
- 2034-11-13
AI Technical Summary
In the prior art, in the decolorization test of plastic materials and products for food contact, it is difficult for the experimenter to maintain the consistency of the wipe strength and frequency, which affects the accuracy of the test results.
An automatic wipe device for decolorization test is designed, using a mobile module and a pressure sensor to detect the wipe force, and automatically adjust it through the control motherboard to ensure that the wipe force is within the specified range, and the consistency of wipe is achieved through three-axis robotic hands and mechanical jaws.
The consistency of the wipe frequency and strength of the degreased cotton on plastic samples is achieved, which reduces the operating strength of the experimenters and improves the accuracy and automation of the test results.
Smart Images
Figure CN223272386U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of food safety, in particular to an automatic wiping device for decolorization testing. Background Art
[0002] GB31604.7-2023, "National Food Safety Standard for Discoloration Test of Food Contact Materials and Articles," specifies a method for discoloration testing of food contact plastic materials and articles. This method is applicable to the determination of discoloration by immersion in liquids containing colorants and by wiping of food contact plastic materials and articles. The discoloration test method is as follows: A 2cm*2cm piece of absorbent cotton weighing 0.25g to 0.30g is completely soaked with the corresponding food simulant. The experimenter, wearing non-marking nitrile gloves, holds the absorbent cotton with tweezers and rubs it back and forth 100 times at a speed of 1 time / s on a sample approximately 4cm*2cm in size. When wiping, apply even force along the surface of the test sample, ensuring that the test force is within 1.0±0.2kg.
[0003] However, there are some problems in actual operation. First, the wiping frequency of the experimenters cannot be completely consistent, and it is also difficult to maintain the wiping force value within the range of 1.0±0.2kg; second, when there are many test samples, the operation intensity of the experimenters is too high, which will also have a great impact on the accuracy of the test results.
[0004] Therefore, in view of the shortcomings of the prior art, it is necessary to design an automatic wiping device for decolorization test to solve the above problems.
[0005] It should be noted that the above introduction to the technical background is only for the convenience of providing a clear and complete description of the technical solution of the present invention and facilitating the understanding of those skilled in the art. It cannot be assumed that the above contents are well known to those skilled in the art simply because they are explained in the background technology of the present invention. Utility Model Content
[0006] In order to overcome the above-mentioned deficiencies in the prior art, the present invention aims to disclose an automatic wiping device for decolorization test, which is used to solve the problem that it is difficult to maintain stable wiping force and frequency when manually performing decolorization tests on plastic products.
[0007] The utility model discloses an automatic wiping device for decolorization test, comprising a test bench and a wiping assembly, wherein the end surface of the test bench is provided with a sample fixing plate for placing a plastic sample and a simulation liquid placing groove for placing a food simulation liquid, the sample fixing plate is provided with a sample fixing groove, the bottom of the sample fixing groove is provided with a first pressure sensor, the output end above the first pressure sensor is installed with a supporting plate, and the wiping force exerted on the plastic sample is tested by the first pressure sensor; the wiping assembly comprises a moving module, the output end of the moving module can move freely along the X, Y and Z axis directions above the test bench, and the output end of the moving module is connected with a sample clamp for clamping absorbent cotton.
[0008] Preferred technical solution: The test bench is also equipped with a six-color nine-level card, and the absorbent cotton after the test is compared with the six-color nine-level card to determine the discoloration of the plastic sample.
[0009] Preferred technical solution: The automatic wiping device also includes a control mainboard, and the first pressure sensor and the wiping assembly are electrically connected to the control mainboard. The control mainboard makes it easier to adjust the motion parameters of the wiping assembly, and the movement of the wiping assembly can be automatically adjusted according to the data feedback from the first pressure sensor to ensure that the wiping force of the sample clamp holding the absorbent cotton to wipe the plastic sample is always within the specified range.
[0010] Preferred technical solution: The wiping assembly also includes a second pressure sensor, which is arranged at the connection between the sample fixture and the movable module, and is used to detect the wiping force from the sample fixture end and compare it with the first pressure sensor to ensure the accuracy of the wiping force detection.
[0011] Preferred technical solution: A protective cover is provided above the test bench and the wiping assembly. The protective cover is made of transparent material, and the control main board is arranged on the outside of the protective cover. The protective cover isolates the entry of external dust and impurities, and also prevents internal substances from entering the external environment and polluting the environment. At the same time, its transparent material facilitates observation of internal tests.
[0012] Preferred technical solution: The mobile module is a three-axis manipulator with high movement precision.
[0013] Preferred technical solution: The sample clamp is a mechanical clamp, which is convenient for clamping and fixing the absorbent cotton.
[0014] Preferred technical solution: The sample fixing plate and the supporting plate are made of stainless steel, which is convenient for cleaning and maintenance.
[0015] Preferred technical solution: The sample fixing plate is fixed on the test bench by screws.
[0016] Due to the application of the above technical solution, the present invention has the following beneficial effects compared with the prior art:
[0017] The utility model discloses an automatic wiping device for decolorization test. A mobile module that can move freely along the X, Y, and Z axes replaces manual wiping action, thereby greatly improving the frequency consistency of wiping plastic samples with absorbent cotton. A pressure sensor is provided at the lower end of the plastic sample placement location for real-time detection of the pressure exerted by the absorbent cotton on the plastic sample when wiping it, thereby preventing the wiping force from exceeding a prescribed range. At the same time, a control panel is used to apply data feedback from the pressure sensor to the motion control of the mobile module, thereby realizing automatic adjustment of the wiping force. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the specific implementation methods or the description of the prior art. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.
[0019] Figure 1 This is a structural diagram of an automatic wiping device for decolorization test according to the present invention;
[0020] Figure 2 This is a schematic diagram of the internal structure of an automatic wiping device for decolorization test according to the present invention;
[0021] Figure 3 This is an exploded view of the sample fixing plate in the present invention.
[0022] In the above figures, 1. test bench; 11. sample fixing plate; 11a. sample fixing groove; 12. simulated liquid placement tank; 13. first pressure sensor; 14. support plate; 15. six-color nine-level card; 2. wiping assembly; 21. moving module; 22. sample fixture; 23. second pressure sensor; 3. control main board; 4. protective cover. DETAILED DESCRIPTION
[0023] The following describes the implementation of the present invention through specific embodiments. People familiar with this technology can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.
[0024] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchanged where appropriate to describe the embodiments of the present application here. In addition, the terms "including" and "having" and their synonyms are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.
[0025] In this application, terms such as "upper," "lower," "left," "right," "front," "back," "top," "bottom," "inner," "outer," "center," "vertical," "horizontal," "transverse," and "longitudinal" indicate positions or locations based on the positions or locations shown in the accompanying drawings. These terms are primarily intended to better describe the present invention and its embodiments and are not intended to limit the devices, elements, or components indicated to having a specific orientation, or to being constructed or operated in a specific orientation.
[0026] Furthermore, some of the above terms may be used to express other meanings besides indicating a position or location. For example, the term "on" may also be used to indicate a dependency or connection in certain circumstances. Those skilled in the art will understand the specific meanings of these terms in this utility model based on the specific circumstances.
[0027] Furthermore, the terms "installed," "disposed," "provided with," "connected," "connected," "sleeved," and "fitted" should be interpreted broadly. For example, "connected" can mean a fixed connection, a removable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection, an indirect connection through an intermediary, or internal communication between two devices, elements, or components. For another example, "fitted" can mean complete or partial contact. Those skilled in the art will understand the specific meanings of these terms in this utility model based on the specific circumstances.
[0028] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this 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.
[0029] Example:
[0030] like Figure 1 As shown, the present invention discloses an automatic wiping device for decolorization test, including a test bench 1 and a wiping assembly 2. The main components of the present invention will be described in detail below:
[0031] like Figure 1 、 Figure 2 and Figure 3 As shown, a sample fixing plate 11 and a simulated liquid placement tank 12 are provided on the upper end surface of the test bench 1. A sample fixing groove 11a is provided on the sample fixing plate 11. A first pressure sensor 13 is provided at the bottom of the sample fixing groove 11a. A supporting plate 14 is installed at the output end above the first pressure sensor 13. A six-color nine-level card 15 is also provided on the test bench 1.
[0032] like Figure 1 、 Figure 2 and Figure 3 As shown, the wiping assembly 2 includes a moving module 21 , the output end of the moving module 21 can move freely along the X, Y, and Z axis directions above the test bench 1 , and the output end of the moving module 21 is connected to a sample fixture 22 .
[0033] refer to Figure 1 、 Figure 2 and Figure 3 As shown, the use method and principle of the utility model are as follows:
[0034] Cut the plastic sample into a shape similar to the sample fixing groove 11a, and place the cut plastic sample on the supporting plate 14 in the sample fixing groove 11a. The sample fixing groove 11a restricts the horizontal movement of the plastic sample and allows the force on the upper end of the plastic sample to be transmitted to the first pressure sensor 13.
[0035] A sample holder 22 is used to hold absorbent cotton. The movable module 21 is used to control the sample holder 22 to move to the simulated liquid placement tank 12. The absorbent cotton is then saturated with the food simulated liquid. The absorbent cotton saturated with the food simulated liquid is then driven by the movable module 21 to wipe the plastic sample back and forth 100 times at a speed of 1 time / s. During this process, the wiping force of the absorbent cotton is adjusted by the first pressure sensor 13 so that the pressure of the absorbent cotton on the plastic sample is within the range of 8 to 12N. The wiping process is completed by the movable module 21, ensuring the consistency of the wiping movement and reducing the workload of the test personnel.
[0036] After wiping is completed, the sample holder 22 and the absorbent cotton thereon are moved to the six-color nine-level card 15 through the moving module 21 for comparison to obtain the test results.
[0037] like Figure 1 、 Figure 2 and Figure 3As shown, in order to improve the degree of automation of the automatic wiping device, the automatic wiping device also includes a control main board 3, the first pressure sensor 13 and the wiping component 2 are electrically connected to the control main board 3, and the control main board 3 is used to process the signal fed back by the first pressure sensor 13, and automatically control the wiping component 2 by sending a signal.
[0038] like Figure 1 、 Figure 2 and Figure 3 As shown, in order to ensure the reliability of the test, the wiping assembly 2 also includes a second pressure sensor 23. The second pressure sensor 23 is arranged at the connection between the sample holder 22 and the movable module 21. The second pressure sensor 23 is compared with the first pressure sensor 13 to ensure the stability of the wiping force during the test.
[0039] like Figure 1 、 Figure 2 and Figure 3 As shown, in order to reduce the interference of the external environment on the test, a protective cover 4 is provided above the test bench 1 and the wiping assembly 2. The protective cover 4 is made of transparent material, and the control main board 3 is arranged on the outside of the protective cover 4, isolating the external environment without affecting the observation of the internal test.
[0040] like Figure 1 、 Figure 2 and Figure 3 As shown, in order to further improve the consistency of wiping with absorbent cotton, the mobile module 21 adopts a three-axis manipulator with high motion accuracy and good motion trajectory consistency.
[0041] like Figure 1 、 Figure 2 and Figure 3 As shown, in order to further improve the efficiency of the decolorization test, the sample clamp 22 uses a mechanical clamp that can automatically clamp the absorbent cotton.
[0042] like Figure 1 、 Figure 2 and Figure 3 As shown, in order to facilitate cleaning and maintenance of the automatic wiping device, the sample fixing plate 11 and the supporting plate 14 are made of stainless steel, which is not easy to rust; the sample fixing plate 11 is fixed to the test bench 1 by screws, which is convenient for disassembly and assembly.
[0043] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.
Claims
1. An automatic wiping device for a decolorization test, comprising a test bench (1) and a wiping assembly (2), characterized in that: The upper end surface of the test bench (1) is provided with a sample fixing plate (11) and a simulated liquid placement tank (12); the sample fixing plate (11) is provided with a sample fixing groove (11a); a first pressure sensor (13) is provided at the bottom of the sample fixing groove (11a); a supporting plate (14) is installed at the output end above the first pressure sensor (13); the wiping assembly (2) includes a movable module (21); the output end of the movable module (21) can move freely along the X, Y, and Z axis directions above the test bench (1); and the output end of the movable module (21) is connected to a sample fixture (22).
2. The automatic wiping device for discoloration test according to claim 1, characterized in that: The test bench (1) is also provided with a six-color nine-level card (15).
3. The automatic wiping device for discoloration test according to claim 1, characterized in that: The automatic wiping device further comprises a control mainboard (3), and the first pressure sensor (13) and the wiping assembly (2) are electrically connected to the control mainboard (3).
4. The automatic wiping device for discoloration test according to claim 3, characterized in that: The wiping assembly (2) further includes a second pressure sensor (23), and the second pressure sensor (23) is arranged at the connection between the sample holder (22) and the moving module (21).
5. The automatic wiping device for discoloration test according to claim 4, characterized in that: A protective cover (4) is provided above the test bench (1) and the wiping assembly (2); the protective cover (4) is made of a transparent material, and the control mainboard (3) is provided outside the protective cover (4).
6. The automatic wiping device for discoloration test according to claim 1, characterized in that: The mobile module (21) is a three-axis manipulator.
7. The automatic wiping device for discoloration test according to claim 1, characterized in that: The sample clamp (22) is a mechanical clamp.
8. The automatic wiping device for discoloration test according to claim 1, characterized in that: The sample fixing plate (11) and the supporting plate (14) are made of stainless steel.
9. The automatic wiping device for discoloration test according to claim 1, characterized in that: The sample fixing plate (11) is fixed on the test bench (1) by screws.