Viscoelastic solid sample preparation device for rheological test

Abstract

The utility model provides a viscoelastic solid sample preparation device for rheological test, which comprises a single-layer sample preparation sheet, a plurality of single-layer sample preparation sheets and a plurality of single-layer sample preparation sheets, the single-layer sample preparation sheets are provided with one or more hollow-out holes, and the hollow-out holes are regular in shape; anti-sticking layers are arranged on the front surface and the back surface of the sample preparation sheet, and the sample preparation sheet stuck with the anti-sticking layers is arranged on a heating plate. According to the device, the defects in the prior art are overcome, and viscoelastic solids with different diameters and different thicknesses can be efficiently manufactured; meanwhile, the diameter and the thickness of the obtained viscoelastic solid are fixed, the influence of the shape of a sample on rheology measurement is reduced, and the reproducibility of a rheology test result is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of rheological testing, and in particular to a viscoelastic solid sample preparation device for rheological testing. Background Art

[0002] The importance of rheological testing lies in providing important parameters and properties of materials, such as stress-strain curves, the effects of temperature and time, rheological behavior, and microstructure and morphology. This information helps to gain a deeper understanding of the properties and behavior of materials and provides important reference for material optimization and application.

[0003] When measuring viscoelastic solids (such as hot-melt pressure-sensitive adhesives), existing rheometers produce irregular samples with uneven thickness and irregular shapes. Without standardized sample preparation using other auxiliary devices, these devices can easily lead to large sample differences and poor reproducibility of test results. A mechatronic rheometer is now needed to solve these problems.

[0004] In view of this, the present invention is proposed. Utility Model Content

[0005] The purpose of the utility model is to provide a viscoelastic solid sample preparation device for rheological testing, which makes it possible to efficiently prepare viscoelastic solids of different diameters and thicknesses, reduce the influence of the sample shape on the rheological measurement, and obtain circular sheet-like viscoelastic solids with consistent diameter and thickness, greatly facilitating rheological testing and improving the reproducibility of rheological test results.

[0006] In order to achieve the above-mentioned purpose of the present invention, the following technical solutions are adopted:

[0007] The utility model provides a viscoelastic solid sample preparation device for rheological testing, comprising: a single-layer sample preparation sheet, on which a single or multiple hollow holes are provided, and the hollow holes have regular shapes; anti-sticking layers are provided on both the front and back sides of the sample preparation sheet, and the sample preparation sheet with the anti-sticking layer is arranged on a heating plate.

[0008] In this utility model, the sample preparation sheet serves as a mold, capable of fixing the shape of the viscoelastic solid. The specific shape of the viscoelastic solid can be freely selected based on the desired hollow hole shape. Because the viscoelastic solid being processed is inherently sticky, anti-sticking layers are provided on both sides of the sample preparation sheet. These layers prevent the viscoelastic solid from adhering to the experimental platform, fixture, or sample preparation sheet during heating, thereby maintaining the shape of the viscoelastic solid and minimizing sample variation.

[0009] Preferably, as a further specific embodiment, the center of a single hollow hole coincides with the center of the sample-preparing sheet, and the multiple hollow holes are of the same size and are evenly arranged on the sample-preparing sheet in a bilaterally symmetrical manner.

[0010] When the sample sheet contains only a single hollow hole, the single hollow hole is located in the middle of the sample sheet, that is, the centers of the two coincide, to prevent uneven force caused by the center being incorrect, thereby causing the thickness of the prepared viscoelastic solid to be uneven; when the sample sheet contains multiple hollow holes, the multiple hollow holes are evenly distributed on the sample sheet to ensure that the shape and size of the prepared viscoelastic solid are irregular, uneven or the thickness is uneven, further ensuring the quality of the finished product, reducing the influence of the sample shape on the rheological measurement, and thus improving the reproducibility of the rheological test results.

[0011] Preferably, as a further specific embodiment, the anti-sticking layer is equal to the shape and size of the sample-preparing sheet, and the anti-sticking layer and the sample-preparing sheet are adhered in a manner of edge-alignment.

[0012] When the size of the anti-sticking layer is consistent with that of the sample preparation sheet, it is necessary to prevent the anti-sticking layer from being too large, which may cause the anti-sticking layers to stick to each other, thereby affecting the preparation of the viscoelastic solid.

[0013] Preferably, as a further specific embodiment, the hollow hole is a circular hole, and the length ratio of the thickness of the sample preparation sheet to the diameter of the circular hole is = (1:1) - (1:500).

[0014] The thickness and diameter of the sheet can be selected according to the size of the viscoelastic solid to be prepared. In the present invention, the thickness is selected to be 100 μm-5000 μm, more preferably 100 μm-1000 μm; the diameter of the circular hole is 5 mm-50 mm, more preferably 8 mm-40 mm.

[0015] Preferably, as a further specific embodiment, the heating plate is arranged on the top surface of the chassis, and a control panel is provided on the side of the chassis. The control panel is provided with a monitoring display, a chassis switch and parameter setting keys for setting experimental parameters and controlling the experiment.

[0016] In order to realize electromechanical control, a chassis is provided in the utility model, which can realize electromechanical control of the sample preparation sheet. The parameter setting buttons on the control panel can set some specific parameters for the preparation of viscoelastic solids, such as the operating speed of the clamp, the heating temperature, etc.; and the display can display the set parameters and the actual operating parameters, and can also display the parameters related to the preparation process such as the viscoelastic solid preparation process.

[0017] The heating device is set on the top surface of the chassis as an experimental platform to heat the viscoelastic solid, so that the viscoelastic solid can be shaped in the sample sheet; after the viscoelastic solid is shaped, the heating device is turned off to shape the viscoelastic solid and ensure its shape.

[0018] Preferably, as a further specific embodiment, a column is further provided on the side of the chassis, and a hollow groove is provided on the side of the column connected to the chassis, the hollow groove is connected to one end of the screw rod, and the screw rod can slide inside the hollow groove.

[0019] Preferably, as a further specific embodiment, the other end of the screw rod is connected to the clamp via a slider, and the slider and the screw rod are movably connected.

[0020] In the present invention, the clamp is pressed down to press the viscoelastic solid into a shape with consistent diameter and thickness. Therefore, during the design process, the screw rod can slide inside the empty slot, which makes it easy to control the clamp to press down to shape the viscoelastic solid; and after the viscoelastic solid is shaped, it is easy to move the clamp up to take out the viscoelastic solid.

[0021] Preferably, as a further specific embodiment, a heating component and a temperature control component are built into the heating plate, which are connected to the control panel via a circuit for controlling the temperature of the heating plate.

[0022] Compared with the prior art, the beneficial effects of the present invention are:

[0023] The device overcomes the shortcomings of the existing technology and makes it possible to efficiently produce viscoelastic solids of different diameters and thicknesses; at the same time, the diameter and thickness of the obtained viscoelastic solids are fixed, reducing the influence of the sample shape on the rheological measurement and improving the reproducibility of the rheological test results. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiment below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present invention. The same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0025] Figure 1 This is a schematic diagram of the three-dimensional structure of the viscoelastic solid sample preparation device for rheological testing of the utility model;

[0026] Figure 2 This is a schematic structural diagram of the combination of a single-layer sample-preparing sheet and a release layer in the present invention;

[0027] Figure 3 This is a schematic diagram of the top view of the single-layer sample preparation sheet in the utility model;

[0028] Figure 4 This is a schematic diagram of the bottom-up structure of a single-layer sample-making sheet in the present invention.

[0029] The symbols in the accompanying drawings are:

[0030] 1. Viscoelastic solid sample preparation device for rheological testing; 2. Chassis; 3. Column; 4. Control panel;

[0031] 5. Heating plate; 6. Anti-sticking layer; 7. Sample-making sheet; 7-1. Single hollow circular hole sample-making sheet; 7-2. Multiple hollow circular hole sample-making sheets; 8. Anti-sticking layer; 9. Clamp; 10. Screw. DETAILED DESCRIPTION

[0032] The technical scheme of the present invention will be clearly and completely described below in conjunction with the accompanying drawings and specific embodiments, but it will be understood by those skilled in the art that the following described embodiments are part of embodiments of the present invention, rather than all embodiments, and are only used to illustrate the present invention, and should not be considered as limiting the scope of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative work are within the scope of protection of the present invention. Those who do not specify specific conditions in the embodiments are carried out according to normal conditions or the conditions recommended by the manufacturer. Those whose reagents or instruments are not specified by the manufacturer are conventional products that can be purchased commercially.

[0033] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0034] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0035] In order to more clearly illustrate the technical solutions of the present invention, specific embodiments are provided below for illustration.

[0036] Example

[0037] Reference Figure 2 , Figure 2 This is a schematic structural diagram of the combination of a single-layer sample-preparing sheet and an anti-sticking layer in the present invention.

[0038] In this embodiment, referring to Figure 2-4 Sample sheet 7 is a single-layer, 1000 μm thick square sheet. A single hollow circular hole with a diameter of 40 mm is provided at the center of sample sheet 7, forming single hollow circular hole sample sheet 7-1. Release layers 8 and 6 are provided on both sides of sample sheet 7. The size and shape of release layers 8 and 6 are equal to those of sample sheet 7, and they are aligned and attached to the edges of sample sheet 7.

[0039] When multiple hollow circular holes are set on the sample sheet 7, the multiple hollow circular holes are evenly arranged on the sample sheet 7 in a left-right symmetrical manner. At this time, the thickness of the sample sheet 7 is 1000 μm, and the diameter of the circular hole is set to 10 mm, forming 7-2 multiple hollow circular hole sample sheets. The front and back sides of the 7-2 multiple hollow circular hole sample sheets are provided with anti-sticking layers 8 and anti-sticking layers 6. The size and shape of the anti-sticking layers 8 and the anti-sticking layers 6 are equal to the shape of the sample sheet 7, and are aligned with the edge of the sample sheet 7 and pasted.

[0040] Reference Figure 1 The composite structure formed by combining the single-pass sample preparation sheet and the anti-sticking layer is placed on the heating plate 5, which is placed on the top surface of the chassis 2. The heating plate 5 has a built-in heating component and a temperature control component. A control panel 4 is provided on the side of the chassis 2. The control panel 4 is provided with a monitoring display, a chassis switch, and parameter setting keys; the chassis switch is responsible for controlling the chassis on and off; the parameter setting keys can control the temperature and heating time of the heating plate 5 through the heating component and the temperature control component, and can also set the operating speed, number of pressing times, and angle of the clamp 9; the monitoring display can display the set parameters and the actual operating parameters in real time.

[0041] A column 3 is also provided on the side of the chassis 2, and an empty slot is provided on the side where the column 3 is connected to the chassis 2. The empty slot is slidably connected to one end of the screw rod 10 to ensure that the screw rod 10 can slide in the empty slot; the other end of the screw rod 10 is connected to the clamp 9, and the clamp 9 and the screw rod 10 are movably connected by a slider, so that the angle of the clamp 9 can be changed, and the center of the clamp 9 corresponds to the center of the heating plate 5.

[0042] The specific workflow is as follows:

[0043] The anti-sticking layer 6 is placed on the heating plate 5, and the sample preparation sheet 7 is aligned with the upper edge of the anti-sticking layer 6. The viscoelastic solid is placed in the middle of the sample preparation sheet 7, and finally the anti-sticking layer 8 is placed. Press the switch of the chassis 2 to turn on the chassis 2, set the heating temperature and constant temperature of the built-in components of the heating plate 5 and the heating time through the control panel 4, and set the operating speed, number of presses and pressing angle of the clamp 9 at the same time. After setting the heating plate 5, the heating plate 5 starts to heat to the set temperature and keeps the temperature constant. The viscoelastic solid changes its shape in the sample preparation sheet 7. Subsequently, the clamp 9 is driven by the screw 10 and continuously approaches the heating plate 5, and presses and shapes the sample preparation sheet-viscoelastic solid-anti-sticking layer. After the clamp 9 finishes running according to the setting, the heating plate 5 stops heating, allowing the viscoelastic solid to cool and harden, and the clamp 9 rises to the top of the column 3 for easy removal. After the operation is completed, a standardized viscoelastic solid sample is obtained.

[0044] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A viscoelastic solid sample preparation device for rheological testing, characterized in that: include: A single-layer sample-preparing sheet is provided with a single or multiple hollow holes, and the hollow holes are of regular shape; both sides of the sample-preparing sheet are provided with anti-sticking layers, and the sample-preparing sheet with the anti-sticking layer is placed on a heating plate.

2. The viscoelastic solid sample preparation device for rheological testing according to claim 1, characterized in that: The center of a single hollow hole coincides with the center of the sample-preparing sheet, and the multiple hollow holes are of the same size and are evenly arranged on the sample-preparing sheet in a bilaterally symmetrical manner.

3. The viscoelastic solid sample preparation device for rheological testing according to claim 1, characterized in that: The anti-sticking layer and the sample-preparing sheet have the same shape and size, and are adhered to the sample-preparing sheet in an edge-aligned manner.

4. The viscoelastic solid sample preparation device for rheological testing according to claim 1, characterized in that: The hollow hole is a circular hole, and the length ratio of the thickness of the sample preparation sheet to the diameter of the circular hole is = (1:1)-(1:500).

5. The viscoelastic solid sample preparation device for rheological testing according to claim 1, characterized in that: The heating plate is arranged on the top surface of the chassis, and a control panel is arranged on the side of the chassis. The control panel is provided with a monitoring display, a chassis switch and parameter setting keys for setting experimental parameters and controlling the experiment.

6. The viscoelastic solid sample preparation device for rheological testing according to claim 5, characterized in that: A column is further provided on the side of the chassis, and a hollow groove is provided on the side of the column connected to the chassis. The hollow groove is connected to one end of the screw rod, and the screw rod can slide inside the hollow groove.

7. The viscoelastic solid sample preparation device for rheological testing according to claim 6, characterized in that: The other end of the screw rod is connected to the clamp through a slider, and the slider is movably connected to the screw rod.

8. The viscoelastic solid sample preparation device for rheological testing according to claim 5, characterized in that: The heating plate has a built-in heating component and a temperature control component, which are connected to the control panel via a circuit for controlling the temperature of the heating plate.

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