Sample preparation device based on thermal mechanical analyzer

Abstract

The utility model provides a sample preparation device based on a thermal mechanical analyzer. The sample preparation device comprises a stand column, an electric push rod, a cutting die mounting piece, a cutting die, an electric push rod switch, a sample clamping clamp and a pressing and cutting platform, a sliding rail is mounted on the cutting die mounting piece, and a cutting die with a proper size is selected to slide into the cutting die mounting piece; a drawable sample table is placed on the pressing and cutting platform with the sample preparation area, and the sample preparation area is arranged on the drawable sample table; a sample clamping clamp is arranged in the sample preparation area, and after the drawable sample table is pulled out, a sample to be tested is placed in the sample preparation area; after the electric push rod is started, the cutter die is pushed to cut a to-be-tested sample, the sample cut from the to-be-tested sample is pushed out by the rebound pad arranged in the cutter die, and the cut sample is taken out from the drawable sample table. The device is convenient to operate, and samples with corresponding shapes and sizes can be conveniently obtained.

Description

Technical Field

[0001] The utility model relates to the technical field of thermal analysis, in particular to a sample preparation device based on a thermal mechanical analyzer. Background Art

[0002] Thermal analysis technology is a type of technology that measures the relationship between certain physical properties of a substance and temperature or time under programmed temperature control (and a certain atmosphere). Common thermal analysis instruments include thermogravimetric analyzers, differential scanning calorimeters, thermomechanical analyzers, etc. Among them, the types of samples involved in thermomechanical analysis experiments are diverse, and the results obtained from samples of different shapes vary greatly. In order to facilitate detection and improve the repeatability and accuracy of measurements, it is usually necessary to prepare the samples into a certain shape. For example, when testing in tensile mode, the samples must be cut into standard test strips. Manual cutting often results in uneven edges and irregular specimens. Especially for samples that are prone to curling, it also increases the difficulty of manual cutting. For example Figure 1 The curve in the figure is the breaking strength value obtained by measuring the paper samples cut by hand. Figure 1 It can be seen that the repeatability between different samples is poor (the data fluctuation is as high as 14.5%), and this method cannot meet the experimental requirements. Therefore, it is necessary to obtain samples with consistent shapes through a special sample preparation device. The data fluctuation of the fracture strength obtained by this method can be controlled within 0.1%, such as Figure 1 The current commercial sample cutting devices have the problems of relatively single size and inability to accurately control the pressure, which cannot meet the preparation requirements of different samples. Utility Model Content

[0003] In order to solve the above technical problems, the utility model provides a sample preparation device based on a thermomechanical analyzer, the knife mold of the device can be easily replaced and the operation is simple. In practical applications, different punching forces and knife heads of different sizes and shapes can be selected for different types of samples based on the needs of different instruments, so as to better obtain samples of different sizes that can meet the test needs.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A sample preparation device based on a thermomechanical analyzer comprises a column, an electric push rod, a knife die mounting part, a knife die, an electric push rod switch, a sample clamp and a pressing and cutting platform; the knife die mounting part is provided with a slide rail, and a knife die of a suitable size is selected to slide onto the knife die mounting part; a pull-out sample table is placed on the pressing and cutting platform with a sample preparation area, and the pull-out sample table is provided with a sample preparation area; the sample preparation area is provided with a sample clamp, and after the pull-out sample table is pulled out, a sample to be tested is placed in the sample preparation area; after the electric push rod is started, the knife die is pushed to press and cut the sample to be tested.

[0006] Furthermore, the built-in rebound pad of the cutting die pushes out the sample cut from the sample to be tested, and takes out the cut sample from the pull-out sample table.

[0007] Furthermore, the blade of the cutting die is rectangular or circular.

[0008] Beneficial effects:

[0009] 1) Easy to operate, and samples of corresponding shapes and sizes can be easily obtained;

[0010] 2) The consistency between the prepared samples is good, and samples with the same shape and size can be obtained for different types of samples;

[0011] 3) Strong versatility. The developed sample preparation device can not only meet the needs of thermomechanical analysis experiments, but also meet the preparation of thin film and bulk samples in the experimental processes of thermal conductivity analyzer, thermogravimetric analyzer, differential scanning calorimeter, etc. by replacing the corresponding tools. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a comparison chart of the paper tensile test results before and after using the sample preparation device;

[0013] Figure 2 It is a structural schematic diagram of a sample preparation device based on a thermomechanical analyzer of the utility model;

[0014] Figure 3a , Figure 3b , Figure 3c , Figure 3d Schematic diagram of inserting the die mounting parts into the die of the prototype making machine; Figure 3a For die-cutting installation parts, Figure 3b It is a rectangular die. Figure 3c To select a rectangular die set in the die mounting, Figure 3d A circular die is used.

[0015] Among them, the reference numerals are: column 1, electric push rod 2, knife die mounting part 3, knife die 4, electric push rod switch 5, sample clamp 6, pressing and cutting platform 7. DETAILED DESCRIPTION

[0016] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the utility model and are not used to limit the utility model. In addition, the technical features involved in each embodiment of the utility model described below can be combined with each other as long as they do not conflict with each other.

[0017] like Figure 2As shown, a sample preparation device based on a thermomechanical analyzer of the utility model comprises a column 1, an electric push rod 2, a knife die mounting part 3, a knife die 4, an electric push rod switch 5, a sample clamp 6, and a pressing and cutting platform 7.

[0018] like Figure 3a As shown, the cutter die mounting member 3 is provided with a slide rail, and a cutter die of suitable size (such as Figure 3b-3d The sample preparation area is equipped with a sample clamp 6. After the pull-out sample table is pulled out, the sample to be tested is placed in the sample preparation area. Especially for samples that are easy to curl, the sample to be tested is clamped and fixed with the sample clamp 6, which is more stable. After the sample to be tested is fixed, it is pushed into the sample preparation device, and the electric push rod switch 5 is started. After the electric push rod 2 is started, it pushes the knife die 4 to press and cut the sample to be tested. After the pressing and cutting is completed, the electric push rod 2 is lifted, and the built-in rebound pad of the knife die 4 will push out the sample cut from the sample to be tested, pull out the pull-out sample table, and take out the cut sample.

[0019] The knife die 4 is composed of a blade and a base plate. The blade is made into different shapes and sizes according to the needs of the thermomechanical analyzer, mainly rectangular knife dies of different sizes ( Figure 3b ) and round die ( Figure 3d ). Figure 3c A rectangular cutting die is shown arranged in the cutting die mounting part 3 .

Claims

1. A sample preparation device based on a thermomechanical analyzer, characterized in that: It includes a column, an electric push rod, a knife die mounting part, a knife die, an electric push rod switch, a sample clamp, and a cutting platform; the knife die mounting part is equipped with a slide rail, and a knife die of suitable size is selected and slid onto the knife die mounting part; a pull-out sample table is placed on the cutting platform with a sample preparation area, and a sample preparation area is set on the pull-out sample table; the sample preparation area is equipped with a sample clamp, and after the pull-out sample table is pulled out, the sample to be tested is placed in the sample preparation area; after the electric push rod is started, it pushes the knife die to cut the sample to be tested.

2. A sample preparation device based on a thermomechanical analyzer according to claim 1, characterized in that: The built-in rebound pad of the cutting die pushes out the sample cut from the test sample, and takes out the cut sample from the pull-out sample table.

3. A sample preparation device based on a thermomechanical analyzer according to claim 1, characterized in that: The blade of the cutting die is rectangular or circular.

Images