Prepreg gel time testing device

Abstract

The utility model discloses a prepreg gelation time testing device which comprises a base, a heating plate, two pieces of cover glass, a tabletting structure, a camera, a controller, an image processing unit and a timer, the heating plate is placed on the base, the size of the cover glass is larger than that of a gum dipping sample, and the camera is arranged on the base. The sheet pressing structure is arranged corresponding to the cover glass, the camera is fixedly arranged right above the cover glass, and the controller is connected with the camera, the image processing unit and the timer. The prepreg gelation time testing device is reasonable in structure, convenient to test, capable of greatly reducing manual sampling and judgment, high in testing accuracy and high in automation degree.

Description

Technical Field

[0001] The utility model relates to a prepreg gel time testing device for testing the gel time of prepregs such as carbon fiber / epoxy resin. Background Art

[0002] In the prior art, the gel time of prepregs such as carbon fiber / epoxy resin is measured manually. The measurement method is as follows: a prepreg sample of a certain size is placed between two microscope cover glasses preheated to the test temperature, pressure is applied to the sample through the cover glasses, and then a probe is used to detect the resin flowing to the edge of the cover glass, and the time from the start of heating to when the resin no longer forms filaments is recorded, which is the gel time. The above measurement method is labor-consuming and time-consuming, and not very convenient. Therefore, it has become an urgent problem to provide a prepreg gel time testing device to facilitate the testing of the prepreg gel time. Summary of the Utility Model

[0003] In view of this, the purpose of the utility model is to provide a prepreg gel time testing device to solve the problems existing in the existing manual testing method.

[0004] The utility model provides a prepreg gel time testing device, including: a base, a heating plate, cover glasses, a pressing structure, a camera, a controller, an image processing unit and a timer. Among them, the heating plate is placed on the base, there are two cover glasses for clamping the impregnated sample and then placing it on the heating plate, the size of the cover glasses is larger than the size of the impregnated sample, the pressing structure is correspondingly arranged with the cover glasses for periodically pressing the cover glasses, the camera is fixedly arranged directly above the cover glasses for periodically collecting images containing the edge information of the impregnated sample, the controller is respectively connected to the camera, the image processing unit and the timer, the controller is used to send the images collected by the camera to the image processing unit, the image processing unit is used to judge whether the edge of the impregnated sample no longer changes according to the images collected by the camera and send the judgment result to the controller, and the controller is also used to control the timer to stop timing according to the judgment result fed back by the image processing unit. Among them, the timer starts timing from when the impregnated sample is clamped by the cover glasses preheated to the test temperature and placed on the heating plate for constant temperature heating.

[0005] Preferably, a plurality of support columns are fixedly spaced on the base, and the heating plate is fixed on the support columns.

[0006] Further preferably, the heating plate is a magnetic heating plate, and the tablet pressing structure includes an electromagnet and an electromagnet on-off control circuit connected to the electromagnet. The electromagnet is placed above the cover glass and does not block the edge of the impregnated sample. The electromagnet is used to periodically press the cover glass in cooperation with the magnetic heating plate under the control of the electromagnet on-off control circuit.

[0007] Further preferably, a placement groove adapted to the cover glass is provided on the heating plate.

[0008] Further preferably, a support frame is provided on one side of the base, and the camera is mounted on the support frame.

[0009] Further preferably, the camera is mounted on the support frame through a universal rotating head.

[0010] Further preferably, the support frame is a telescopic support frame.

[0011] Further preferably, a slide rail is provided on the base, and the support frame is slidably mounted in the slide rail.

[0012] Further preferably, an annular light source is provided circumferentially around the camera.

[0013] The prepreg gel time testing device provided by the present invention can periodically press the impregnated sample through the tablet pressing structure, can periodically collect images of the impregnated sample through the camera, and can judge whether the edge of the impregnated sample no longer changes by comparing the collected images through the image processing unit, that is, whether the glue has solidified. If the edge of the impregnated sample no longer changes, the controller stops timing. The duration from the start of holding the impregnated sample with the preheated cover glass and placing it on the heating plate for constant temperature heating to the stop of timing is the gel time. The entire testing process greatly reduces manual sampling and judgment, and has high testing accuracy and high automation degree. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The following further describes the present invention in detail in conjunction with the drawings and embodiments:

[0015] Figure 1 It is a schematic structural diagram of the prepreg gel time testing device provided by the present invention.

[0016] In the figure, 1, base; 2, heating plate; 3, cover glass; 4, electromagnet; 5, camera; 6, support column; 7, support frame; 8, universal rotating head; 9, slide rail; 10, annular light source. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] The following will further explain the present invention in conjunction with specific implementation schemes, but the present invention is not limited thereto.

[0018] As Figure 1 shown, the utility model provides a device for testing the gel time of prepreg, including a base 1, a heating plate 2, a cover glass 3, a pressing structure, a camera 5, a controller, an image processing unit and a timer. Among them, the heating plate 2 is placed on the base 1. There are two cover glasses 3, which are used to clamp the impregnated specimen and then placed on the heating plate 2. The size of the cover glass 3 is larger than that of the impregnated specimen. The pressing structure is arranged corresponding to the cover glass 3 and is used to periodically press on the cover glass 3. The camera 5 is fixedly arranged directly above the cover glass 3 and is used to periodically collect images containing the edge information of the impregnated specimen. The controller is respectively connected to the camera 5, the image processing unit and the timer. The controller is used to send the images collected by the camera 5 to the image processing unit. The image processing unit is used to judge whether the edge of the impregnated specimen no longer changes according to the images collected by the camera 5 and send the judgment result to the controller. The controller is also used to control the timer to stop timing according to the judgment result fed back by the image processing unit. Among them, the timer starts timing from the moment when the cover glass 3 preheated to the test temperature clamps the impregnated specimen and is placed on the heating plate 2 for constant temperature heating.

[0019] The method for testing the gel time of prepreg using this device for testing the gel time of prepreg is as follows: First, heat the heating plate to the test temperature. Then, place the cover glass on the heating plate for preheating to make it reach the temperature of the heating plate. Next, place the impregnated specimen between the two cover glasses and on the heating plate (the impregnated specimen is completely within the cover glasses). At this time, start timing. After the timing starts, use the pressing structure to periodically press on the cover glass to squeeze out the glue (such as resin or carbon fiber, etc.) in the impregnated specimen. At the same time, use the camera to periodically collect images containing the edge information of the impregnated specimen and send them to the image processing unit (preferably, the camera samples once before and after each pressing). The image processing unit can judge whether there is a change in the edge of the impregnated specimen by comparing the two images before and after each pressing. If there is a change, it means the glue has not solidified and the test continues. If there is no change, it means the glue has solidified. At this time, stop the test and the timing ends. The duration of the timing is the gel time. Among them, comparing the two pictures and judging whether there is a change in the edge of the impregnated specimen in the image belongs to the prior art and will not be elaborated here.

[0020] As an improvement of the technical solution, as Figure 1 shown, a plurality of support columns 6 are fixedly arranged at intervals on the base 1, and the heating plate 2 is fixed on the support columns 6. The support columns are preferably heat-resistant support columns.

[0021] Among them, there are various ways to periodically press on the cover glass 3. For example, a telescopic rod structure can be selected for periodic pressing. As an improvement of the technical solution, asFigure 1 As shown, the heating plate 2 is a magnetic heating plate. The tablet pressing structure includes an electromagnet 4 and an electromagnet on-off control circuit (not shown in the figure) connected to the electromagnet. The electromagnet 4 is placed above the cover glass 3 without blocking the edge of the impregnated sample. The electromagnet 4 is used to periodically press the cover glass 3 in cooperation with the magnetic heating plate under the control of the electromagnet on-off control circuit.

[0022] To prevent the cover glass from moving during the test, as an improvement to the technical solution, as Figure 1 shown, a placement groove adapted to the cover glass 3 is provided on the heating plate 2.

[0023] As an improvement to the technical solution, as Figure 1 shown, a support frame 7 is provided on one side of the base 1, and the camera 5 is installed on the support frame 7.

[0024] As an improvement to the technical solution, as Figure 1 shown, the camera 5 is installed on the support frame 7 through a universal swivel head 8. Before the test, the photographing direction of the camera can be adjusted through the universal swivel head to meet the requirements of image acquisition.

[0025] As an improvement to the technical solution, as Figure 1 shown, the support frame 7 is a telescopic support frame for adjusting the height of the camera, and further adjusting the distance between the camera and the impregnated sample to meet the requirements of image acquisition.

[0026] As an improvement to the technical solution, as Figure 1 shown, a slide rail 9 is provided on the base 1, and the support frame 7 is slidably installed in the slide rail 9. Before the test, the position of the support frame in the slide rail can be adjusted so that the camera is located at a suitable photographing position. Preferably, the camera is located directly above the cover glass.

[0027] As an improvement to the technical solution, as Figure 1 shown, an annular light source 10 is provided circumferentially around the camera 5 to ensure the photographing effect.

[0028] The specific embodiments of the present invention are written in a progressive manner, emphasizing the differences between each embodiment, and the similar parts can be referred to each other.

[0029] The above has described in detail the embodiments of the present invention in conjunction with the accompanying drawings. However, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the scope of knowledge possessed by those of ordinary skill in the art.

Claims

1. Prepreg gel time testing device, characterized in that, include: A base (1), a heating plate (2), a cover glass (3), a pressing structure, a camera (5), a controller, an image processing unit and a timer, wherein the heating plate (2) is placed on the base (1), the cover glass (3) is two pieces, which are used to clamp the dipped sample and then placed on the heating plate (2), the size of the cover glass (3) is larger than the size of the dipped sample, the pressing structure is arranged corresponding to the cover glass (3) and is used to periodically apply pressure to the cover glass (3), and the camera (5) is fixedly arranged just above the cover glass (3) and is used to periodically collect images containing edge information of the dipped sample. The controller is respectively connected to the camera (5), the image processing unit and the timer. The controller is used to send the image captured by the camera (5) to the image processing unit. The image processing unit is used to judge whether the edge of the dipped sample no longer changes based on the image captured by the camera (5) and send the judgment result to the controller. The controller is also used to control the timer to stop timing based on the judgment result fed back by the image processing unit. The timer starts timing when the dipped sample is clamped by a cover glass (3) preheated to the test temperature and placed on the heating plate (2) for constant temperature heating.

2. The prepreg gel time testing device according to claim 1, characterized in that: A plurality of support columns (6) are fixed at intervals on the base (1), and the heating plate (2) is fixed on the support columns (6).

3. The prepreg gel time testing device according to claim 1, characterized in that: The heating plate (2) is a magnetic heating plate, and the pressing structure comprises an electromagnet (4) and an electromagnet on-off control circuit connected to the electromagnet. The electromagnet (4) is placed above the cover glass (3) without blocking the edge of the dipped sample. The electromagnet (4) is used to periodically apply pressure to the cover glass (3) by cooperating with the magnetic heating plate under the control of the electromagnet on-off control circuit.

4. The prepreg gel time testing device according to claim 1, characterized in that: The heating plate (2) is provided with a placement groove adapted to the cover glass (3).

5. The prepreg gel time testing device according to claim 1, characterized in that: A support frame (7) is provided on one side of the base (1), and the camera (5) is mounted on the support frame (7).

6. The prepreg gel time testing device according to claim 5, characterized in that: The camera (5) is mounted on the support frame (7) via a universal rotating head (8).

7. The prepreg gel time testing device according to claim 5, characterized in that: The support frame (7) is a telescopic support frame.

8. The prepreg gel time testing device according to claim 5, characterized in that: The base (1) is provided with a slide rail (9), and the support frame (7) is slidably installed in the slide rail (9).

9. The prepreg gel time testing device according to claim 1, characterized in that: An annular light source (10) is arranged around the camera (5).

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