Thermal deformation vicat softening point testing equipment

Abstract

The embodiment of the invention provides thermal deformation vicat softening point testing equipment which comprises a heating box used for containing a heat transfer medium capable of heating to-be-tested plastic, and a heating device used for heating the to-be-tested plastic to heat the to-be-tested plastic to heat the to-be-tested plastic to heat the to-be-tested plastic; the testing assembly is used for abutting against the to-be-tested plastic and testing the Vicat softening point of the to-be-tested plastic; the liquid cooling mechanism is at least partially arranged in the heating box and can be in contact with the heat transfer medium; the air cooling mechanism comprises an air guide shell and a fan, the air guide shell is arranged on the periphery of the heating box, an air path is formed between the air guide shell and the outer wall of the heating box, and the fan communicates with the air path and is used for providing airflow for the air path. An air guide shell of the air cooling mechanism is arranged on the periphery of the heating box, an air path is formed between the air guide shell and the outer wall of the heating box, a draught fan of the air cooling mechanism provides airflow for the air path, the airflow can flow along the air path and exchange heat with the heating box, the liquid cooling mechanism arranged in the heating box is matched to cool a heat transfer medium at the same time, and the cooling efficiency is high; and the test efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of plastic thermal deformation testing, in particular to a thermal deformation Vicat softening point testing device. Background Art

[0002] Vicat softening point is one of the indicators to evaluate the heat resistance of materials and reflect the physical and mechanical properties of thermoplastic products under heating conditions. Vicat softening point is the temperature when a thermoplastic sample is placed in a liquid heat transfer medium and a 1 square millimeter pressure needle is pressed into the sample by 1 mm under a predetermined load and a constant temperature rise of the heat transfer medium.

[0003] In the related art, a heat deformation Vicat softening point test device is usually used to test the Vicat softening point of plastics. Before the next measurement, the heat deformation Vicat softening point test device needs to cool the liquid heat transfer medium to a predetermined temperature. The existing heat deformation Vicat softening point test device has an unsatisfactory cooling efficiency for the liquid heat transfer medium, resulting in too low test efficiency. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a thermal deformation Vicat softening point test device, which has a high cooling efficiency for the heat transfer medium and can improve the test efficiency.

[0005] An embodiment of the present invention provides a thermal deformation Vicat softening point testing device, which includes: a heating box for accommodating a heat transfer medium, wherein the heat transfer medium can heat a plastic to be tested; a testing component, which is used to abut against the plastic to be tested and test the Vicat softening point of the plastic to be tested; a liquid cooling mechanism, which is at least partially disposed in the heating box and can contact the heat transfer medium; an air cooling mechanism, which includes an air guide shell and a fan, wherein the air guide shell is disposed on the periphery of the heating box and forms an air path with the outer wall of the heating box, and the fan is connected to the air path and is used to provide airflow to the air path.

[0006] The thermal deformation Vicat softening point testing device provided by the embodiment of the present invention has at least the following beneficial effects:

[0007] By setting up an air cooling mechanism and a liquid cooling mechanism, the air guide shell of the air cooling mechanism is arranged on the periphery of the heating box and forms an air path with the outer wall of the heating box. The fan of the air cooling mechanism provides air flow to the air path. The air flow can flow along the air path and exchange heat with the heating box. The liquid cooling mechanism arranged in the heating box can cool the heat transfer medium at the same time. The cooling efficiency is high, which improves the test efficiency.

[0008] In an embodiment of this implementation, the outer wall of the heating box includes a side wall and a bottom wall, the air guide shell includes a side plate and a bottom plate, a first chamber is formed between the side plate and the side wall, a second chamber is formed between the bottom plate and the bottom wall, and the first chamber and the second chamber are connected to form the air path.

[0009] In an example of this implementation manner, a first air outlet is formed between the top end of the side plate and the side wall, a second air outlet is opened on the bottom plate, and the fan is connected to the second air outlet.

[0010] In an example of this implementation, the thermal deformation Vicat softening point testing equipment includes a fixed frame, the top of the fixed frame is connected to the heating box, and there are multiple side panels, which are all installed on the outer peripheral side of the fixed frame and are respectively enclosed with the side walls and the top of the fixed frame to form multiple independent first air outlets.

[0011] In an example of this implementation manner, the bottom plate is installed on the bottom side of the fixed frame, and the second air outlet is opened in the middle of the bottom plate.

[0012] In an embodiment of this implementation mode, the fixed frame includes multiple longitudinal beams and multiple cross beams, the top end of the longitudinal beam is connected to the heating box, the cross beam connects the bottom ends of two adjacent longitudinal beams, and the two ends of the side panels in the horizontal direction are respectively connected to the corresponding longitudinal beams.

[0013] In an example of this implementation manner, the longitudinal beam includes a first connecting plate and a second connecting plate, the first connecting plate and the second connecting plate are connected and intersect to form an angle, and the first connecting plate and the second connecting plate are respectively connected to different side plates.

[0014] In an embodiment of this implementation mode, the airflow flows in from the first air outlet, passes through the first chamber and the second chamber in sequence, and flows out from the second air outlet. In the flow direction of the airflow, the spacing distance between the side wall and the side panel gradually increases.

[0015] In an example of this implementation manner, the relative position of the side plate and the side wall in the vertical direction is adjustable to adjust the cross-sectional size of the first air outlet.

[0016] In an example of this implementation, the thermal deformation Vicat softening point testing equipment includes a base, the base is provided with an installation chamber, an installation opening and a vent, the heating box is arranged at the installation opening and extends into the installation chamber, the air path is connected to the installation chamber, and the vent is connected to the installation chamber.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of a thermal deformation Vicat softening point testing device according to an embodiment of the present invention;

[0020] Figure 2 yes Figure 1 A three-dimensional structural diagram of a heating box and an air cooling mechanism and related components;

[0021] Figure 3 yes Figure 1 A schematic cross-sectional view of the heating box and air cooling mechanism and related components;

[0022] Figure 4 yes Figure 1 A schematic diagram of the structure of the heating box, the fixing frame and the air guide shell in a disassembled state;

[0023] Figure 5 yes Figure 1 Schematic diagram of the three-dimensional structure of the fixed frame.

[0024] Reference numerals:

[0025] Thermal deformation Vicat softening point testing device 100; heating box 10; side wall 101; bottom wall 102; box seat 11; box body 12; test assembly 20; liquid cooling mechanism 30; air cooling mechanism 40; air guide shell 41; side plate 411; strip hole 4111; bottom plate 412; fan 42; air guide cover 43; base 50; installation opening 501; vent 502; heating tube 60; fixing frame 70; longitudinal beam 71; first connecting plate 711; second connecting plate 712; cross beam 72; fixing hole 701; motor 80; air path 90; first chamber 91; second chamber 92; first air outlet 93; second air outlet 94. DETAILED DESCRIPTION

[0026] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0027] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0028] In the description of the present invention, "several" means more than one, "many" means more than two, "greater than", "less than", "exceed", etc. are understood to exclude the number itself, and "above", "below", "within", etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0029] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0030] In the description of the present invention, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0031] See also Figures 1 to 3 , Figure 1 1 is a schematic diagram of the three-dimensional structure of a thermal deformation Vicat softening point testing device 100 according to an embodiment of the present invention; Figure 2 yes Figure 1 A schematic diagram of the three-dimensional structure of the heating box 10, the air cooling mechanism 40 and related components; Figure 3 yes Figure 1The cross-sectional structural schematic diagram of the heating box 10 and the air cooling mechanism 40 and related components. The embodiment of the present invention provides a heat deformation Vicat softening point test device 100, which includes a heating box 10, a test assembly 20, a liquid cooling mechanism 30 and an air cooling mechanism 40. The heating box 10 is used to accommodate a heat transfer medium, and the heat transfer medium can heat the plastic to be tested. The test assembly 20 is used to abut against the plastic to be tested and test the Vicat softening point of the plastic to be tested. At least part of the liquid cooling mechanism 30 is arranged in the heating box 10 and can contact the heat transfer medium. The air cooling mechanism 40 includes an air guide shell 41 and a fan 42. The air guide shell 41 is arranged on the periphery of the heating box 10 and forms an air path 90 with the outer wall of the heating box 10. The fan 42 is connected to the air path 90 and is used to provide airflow to the air path 90.

[0032] Specifically, the liquid cooling mechanism 30 includes a liquid cooling pipe, which extends into the heating box 10 and winds around the bottom of the cavity of the heating box 10 to fully immerse the heat transfer medium. The liquid cooling pipe is used to pass the cooling medium, and the heat of the heat transfer medium is taken away by the cooling medium to achieve a cooling effect. The thermal deformation Vicat softening point test device 100 includes a heating pipe 60, which extends into the heating box 10 and is located on the top side of the liquid cooling pipe. The heating pipe 60 is used to heat the heat transfer medium. The heat transfer medium can be selected as oil.

[0033] In this embodiment, the thermal deformation Vicat softening point test device 100 is provided with four test stations, each station is provided with a test assembly 20 to test the corresponding plastic to be tested. The test assembly 20 carries the plastic to be tested and extends into the heating box 10 so that the heat transfer medium is in heat transfer contact with the plastic to be tested. The test assembly 20 can abut against the plastic to be tested and apply a predetermined load to the plastic to be tested. After the heat transfer medium heats the plastic to be tested, the test assembly 20 reads the current temperature after the deformation of the plastic to be tested reaches a preset value to obtain the Vicat softening point of the plastic to be tested. The thermal deformation Vicat softening point test device 100 includes a motor 80, which is used to stir the heat transfer medium in the heating box 10 so that the temperature distribution of the heat transfer medium is uniform.

[0034] By setting up an air cooling mechanism 40 and a liquid cooling mechanism 30, the air guide shell 41 of the air cooling mechanism 40 is arranged on the periphery of the heating box 10, and forms an air path 90 with the outer wall of the heating box 10. The fan 42 of the air cooling mechanism 40 provides airflow to the air path 90. The airflow can flow along the air path 90 and exchange heat with the heating box 10. The liquid cooling mechanism 30 arranged in the heating box 10 cools the heat transfer medium at the same time. The cooling efficiency is high, and the test efficiency is improved.

[0035] In one embodiment of this implementation, please refer to Figure 1The hot deformation Vicat softening point test device 100 includes a base 50, which is provided with an installation chamber (not shown), an installation opening 501 and a vent 502. The heating box 10 is arranged at the installation opening 501 and extends into the installation chamber. The air path 90 is connected to the installation chamber, and the vent 502 is connected to the installation chamber. Such a configuration is conducive to reducing space occupation, and the air path 90 can exchange gas with the outside through the vent 502, so that the air flow can continuously cool the heating box 10.

[0036] In this embodiment, there are multiple vents 502, which are arranged on different sides of the base 50 to improve the flow efficiency of the airflow. The fan 42 and the air guide shell 41 are connected through the air guide cover 43, and the fan 42 is installed on the inner wall of the base 50.

[0037] In one embodiment of this implementation, please refer to Figure 2 and Figure 3 The outer wall of the heating box 10 includes a side wall 101 and a bottom wall 102, the air guide shell 41 includes a side plate 411 and a bottom plate 412, a first chamber 91 is formed between the side plate 411 and the side wall 101, a second chamber 92 is formed between the bottom plate 412 and the bottom wall 102, and the first chamber 91 and the second chamber 92 are connected to form an air path 90. With such an arrangement, the airflow can exchange heat with the side wall 101 and the bottom wall 102, which is conducive to improving the cooling efficiency of the heat transfer medium.

[0038] In one embodiment of this implementation, please refer to Figure 2 and Figure 3 A first air port 93 is formed between the top of the side plate 411 and the side wall 101, a second air port 94 is provided on the bottom plate 412, and the fan 42 is connected to the second air port 94. Specifically, the top of the side plate 411 is spaced from the side wall 101 to form the first air port 93. By forming the first air port 93 between the top of the side plate 411 and the side wall 101, the air flow can flow along the side wall 101 in the vertical direction to obtain a larger heat exchange area, which is beneficial to improving the cooling efficiency of the heat transfer medium.

[0039] In this embodiment, the spacing distance between the top of the side panel 411 and the side wall 101 is 1mm-3mm, so as to increase the flow rate of the airflow at the first air outlet 93, thereby improving the circulation efficiency of the airflow and the cooling efficiency, while not causing the problem of difficulty in air inlet and outlet at the first air outlet 93.

[0040] In one embodiment of this implementation, please refer to Figure 2 and Figure 3 The airflow flows in from the first air outlet 93, passes through the first chamber 91 and the second chamber 92 in sequence, and flows out from the second air outlet 94. In the flow direction of the airflow, the spacing distance between the side wall 101 and the side plate 411 gradually increases.

[0041] Specifically, the distance between the side wall 101 and the side plate 411 gradually increases in the direction close to the bottom plate 412. In this embodiment, the side plate 411 is located on a vertical plane, and the side wall 101 is inclined relative to the vertical plane to form a first chamber 91 with a gradually increasing cross-sectional area in the direction close to the bottom plate 412. It can be understood that setting the distance between the side wall 101 and the side plate 411 to gradually increase in the flow direction of the airflow can make the airflow have a better flow efficiency, which is conducive to the airflow to fully exchange heat with the heating box 10 to cool the heat transfer medium.

[0042] In one embodiment of this implementation, please refer to Figure 2 and Figure 4 , Figure 4 yes Figure 1 Schematic diagram of the structure of the heating box 10, the fixed frame 70 and the air guide shell 41 in the exploded state. The relative position of the side panel 411 and the side wall 101 in the vertical direction is adjustable to adjust the cross-sectional size of the first air outlet 93. Specifically, the side panel 411 is provided with a strip hole 4111 extending in the vertical direction, and the side wall 101 is provided with a fixing hole 701. The thermal deformation Vicat softening point test equipment 100 includes a fastener (not shown), which is passed through the strip hole 4111 and cooperates with the fixing hole 701 to complete the fixation of the side panel 411 on the fixed frame 70. It can be understood that if the cross-section of the first air outlet 93 is too large, the wind speed of the first air outlet 93 will be too low, and if the cross-section of the first air outlet 93 is too small, it will cause difficulty in the airflow in and out, both of which are not conducive to achieving stable and rapid heat dissipation. By setting the side panel 411 and the side wall 101 to be adjustable in relative position in the vertical direction, and setting the spacing between the side wall 101 and the side panel 411 to gradually increase in the flow direction of the airflow, the cross-section of the first air outlet 93 can be adjusted, which is beneficial to improving applicability.

[0043] In one embodiment of this implementation, please refer to Figure 3 and Figure 4, the thermal deformation Vicat softening point test device 100 includes a fixed frame 70, the top of the fixed frame 70 is connected to the heating box 10, the number of side panels 411 is multiple, and the multiple side panels 411 are all installed on the outer peripheral side of the fixed frame 70, and are respectively enclosed with the side wall 101 and the top of the fixed frame 70 to form multiple independent first air outlets 93. Specifically, the top of the fixed frame 70 is connected to the outer side of the heating box 10 in the horizontal direction, and the side panel 411 is installed on the side of the fixed frame 70 facing away from the heating box 10 in the horizontal direction, so that the side panel 411, the fixed frame 70 and the heating box 10 are enclosed to form the first air outlet 93. Each side panel 411 is respectively enclosed with the fixed frame 70 and the heating box 10 to form a corresponding first air outlet 93. In this embodiment, the number of the first air outlet 93 and the side panel 411 are both four. In other embodiments, the number of the first air outlet 93 and the side panel 411 can also be other.

[0044] By setting up multiple side panels 411, which are respectively enclosed with the side walls 101 and the top of the fixed frame 70 to form multiple independent first air outlets 93, airflow can flow in or out of the multiple first air outlets 93 at the same time, ensuring the flow efficiency of the airflow. At the same time, the multiple side panels 411 are installed on the fixed frame 70, and the multiple side panels 411 are easy to disassemble and assemble, so as to facilitate the modification of existing equipment.

[0045] It is understandable that when the cooling efficiency of the existing equipment for the heat transfer medium is too low, resulting in unsatisfactory test efficiency, the air cooling mechanism 40 can be installed on the existing equipment through the fixed frame 70 to improve the test efficiency of the existing equipment.

[0046] In one embodiment of this implementation, please refer to Figure 3 and Figure 4 The bottom plate 412 is mounted on the bottom side of the fixed frame 70, and the second air outlet 94 is opened in the middle of the bottom plate 412. In this way, the distance of the air flow from each first air outlet 93 to the second air outlet 94 is roughly the same, which is conducive to fully dissipating the heat of the heating box 10.

[0047] In one embodiment of this implementation, please refer to Figure 3 and Figure 4The fixed frame 70 includes a plurality of longitudinal beams 71 and a plurality of transverse beams 72. The top of the longitudinal beam 71 is connected to the heating box 10. The transverse beam 72 is connected to the bottom ends of two adjacent longitudinal beams 71. Both ends of the side panels 411 in the horizontal direction are respectively connected to the corresponding longitudinal beams 71. Specifically, the plurality of transverse beams 72 are connected end to end to form a "mouth" shape. The top of the longitudinal beam 71 is respectively connected to the heating box 10 and the side panels 411 on both sides in the horizontal direction to enclose and form a first air outlet 93. Also, the two adjacent longitudinal beams 71 are fitted with the two sides of the side panel 411 in the horizontal direction, and the transverse beam 72 is fitted with the bottom end of the side panel 411 to enclose together with the side wall 101 to form a first chamber 91. By arranging a plurality of longitudinal beams 71 and a plurality of transverse beams 72 in the fixed frame 70, a hollow structure is formed, which can be respectively enclosed with each side panel 411 and each side wall 101 of the heating box 10 to form a first chamber 91 and a first air outlet 93 connected to the first chamber 91. The structure is relatively simple and the cost is low.

[0048] In one embodiment of this implementation, please refer to Figure 4 and Figure 5 , Figure 5 yes Figure 1 The three-dimensional structure diagram of the fixing frame 70 is shown in FIG. The longitudinal beam 71 includes a first connecting plate 711 and a second connecting plate 712. The first connecting plate 711 and the second connecting plate 712 are connected and intersect to form an angle. The first connecting plate 711 and the second connecting plate 712 are respectively connected to different side plates 411. This arrangement facilitates simultaneous connection with two side plates 411 through the longitudinal beam 71, and the structure is relatively simple and the cost is low.

[0049] Specifically, the first connecting plate 711 and the second connecting plate 712 intersect to form a 90-degree angle. In this embodiment, among two adjacent longitudinal beams 71, the first connecting plate 711 of one longitudinal beam 71 is opposite to the second connecting plate 712 of the other longitudinal beam 71, one side of the side plate 411 in the horizontal direction is installed on the first connecting plate 711, and the other side of the side plate 411 in the horizontal direction is installed on the second connecting plate 712, thereby completing the installation of the side plate 411. With such a configuration, the installation and removal of the side plate 411 are relatively simple, and the structure of the fixing frame 70 is relatively simple.

[0050] In this embodiment, the fixed frame 70 and the heating box 10 are connected together by welding. In other embodiments, the fixed frame 70 and the heating box 10 may also be connected together by bolts, screws and other connecting parts to facilitate disassembly and assembly.

[0051] In this embodiment, the heating box 10 includes a box seat 11 and a box body 12. The box seat 11 is connected to the base 50. The box seat 11 is a "mouth"-shaped frame and is arranged around the top side of the box body 12, and the box body 12 is overlapped on the inner side of the box seat 11. The top end of the longitudinal beam 71 is connected to the side of the box seat 11 facing away from the box body 12 in the horizontal direction, so as to define the first air outlet 93 and the first chamber 91 with the side plate 411. Such a configuration facilitates the installation of the heating box 10 and the formation of the first air outlet 93 and the second chamber 92.

[0052] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments. Various changes can be made within the knowledge of ordinary technicians in the relevant technical field without departing from the purpose of the present invention. In addition, the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

Claims

1. A thermal deformation Vicat softening point testing device, characterized in that: include: A heating box, used to contain a heat transfer medium, wherein the heat transfer medium can heat the plastic to be tested; A testing assembly, used for abutting against the plastic to be tested and testing the Vicat softening point of the plastic to be tested; a liquid cooling mechanism, at least partially disposed in the heating box and capable of contacting the heat transfer medium; The air cooling mechanism includes an air guide shell and a fan. The air guide shell is arranged on the periphery of the heating box and forms an air path with the outer wall of the heating box. The fan is connected to the air path and is used to provide airflow to the air path.

2. The thermal deformation Vicat softening point testing device according to claim 1, characterized in that: The outer wall of the heating box includes a side wall and a bottom wall, the air guide shell includes a side plate and a bottom plate, a first chamber is formed between the side plate and the side wall, a second chamber is formed between the bottom plate and the bottom wall, and the first chamber and the second chamber are connected to form the air path.

3. The thermal deformation Vicat softening point testing device according to claim 2, characterized in that: A first air outlet is formed between the top end of the side plate and the side wall, a second air outlet is opened on the bottom plate, and the fan is connected to the second air outlet.

4. The thermal deformation Vicat softening point testing device according to claim 3, characterized in that: The thermal deformation Vicat softening point testing equipment includes a fixed frame, the top of the fixed frame is connected to the heating box, there are multiple side panels, and the multiple side panels are all installed on the outer peripheral side of the fixed frame, and are respectively enclosed with the side walls and the top of the fixed frame to form multiple independent first air outlets.

5. The thermal deformation Vicat softening point testing device according to claim 4, characterized in that: The bottom plate is installed on the bottom side of the fixing frame, and the second air outlet is opened in the middle of the bottom plate.

6. The thermal deformation Vicat softening point testing device according to claim 4, characterized in that: The fixed frame includes a plurality of longitudinal beams and a plurality of transverse beams, the top ends of the longitudinal beams are connected to the heating box, the transverse beams connect the bottom ends of two adjacent longitudinal beams, and the two ends of the side panels in the horizontal direction are respectively connected to the corresponding longitudinal beams.

7. The thermal deformation Vicat softening point testing device according to claim 6, characterized in that: The longitudinal beam includes a first connecting plate and a second connecting plate, the first connecting plate and the second connecting plate are connected and intersect to form an angle, and the first connecting plate and the second connecting plate are respectively connected to different side plates.

8. The thermal deformation Vicat softening point testing device according to claim 3, characterized in that: The airflow flows in from the first air outlet, passes through the first chamber and the second chamber in sequence, and flows out from the second air outlet. In the flow direction of the airflow, the spacing distance between the side wall and the side plate gradually increases.

9. The thermal deformation Vicat softening point testing device according to claim 8, characterized in that: The relative position of the side plate and the side wall in the vertical direction is adjustable to adjust the cross-sectional size of the first air outlet.

10. The thermal deformation Vicat softening point testing device according to claim 1, characterized in that: The thermal deformation Vicat softening point testing equipment includes a base, which is provided with an installation chamber, an installation opening and a vent, the heating box is arranged at the installation opening and extends into the installation chamber, the air path is connected to the installation chamber, and the vent is connected to the installation chamber.

Images