CN116353152A - Carbon fiber aluminum foil plate, flat panel detector and preparation method - Google Patents

Abstract

The invention provides a carbon fiber aluminum foil plate, a flat panel detector and a preparation method. The carbon fiber aluminum foil plate comprises a first aluminum foil layer, a first carbon fiber prepreg layer, a second aluminum foil layer and a second carbon fiber prepreg layer which are sequentially paved from bottom to top. According to the invention, a layer of aluminum foil is paved in the other side paving layer of the carbon fiber aluminum foil plate to form the approximately symmetrical two-sided aluminum foil carbon fiber plate, and meanwhile, the other side appearance surface of the carbon fiber plate is ensured to be a carbon fiber surface, so that the flatness of the carbon fiber aluminum foil plate in a temperature range of-40 ℃ to 60 ℃ can be ensured to be less than 1mm, the carbon fiber aluminum foil plate can be more easily adsorbed on a CNC (computerized numerical control) processing jig, higher processing yield can be obtained, a shaping procedure is not required after processing, and the production efficiency is improved. In addition, when the device is assembled with the whole machine, a higher one-time assembly success rate can be obtained. The double-sided aluminum foil carbon fiber aluminum foil plate has better rigidity, can better resist the deformation of the carbon plate caused by external force in the transportation process, can be stored for a longer time, and has longer storage life.

Description

Carbon fiber aluminum foil plate, flat panel detector and preparation method

Technical Field

The invention relates to the technical field of flat panel detectors, in particular to a carbon fiber aluminum foil plate, a flat panel detector and a preparation method.

Background

The degree to which X-rays are attenuated or absorbed by a material is dependent upon factors such as the composition, atomic number, density, and thickness of the material. The element composition of the resin in the carbon fiber composite material is C, H, O, the element composition of the carbon fiber is C, the absorption coefficient of the carbon fiber composite material to X-ray quality is very small and is far lower than that of common materials, and the carbon fiber composite material has excellent X-ray permeability. In addition, the carbon fiber material has the excellent performances of impact resistance, scratch resistance, easy cleaning, moisture and fire resistance, mold resistance without penetrating surface, static resistance, chemical corrosion resistance, oxidation resistance and the like, and can meet the strength and rigidity requirements of medical appliances to a great extent.

Meanwhile, in order to obtain electromagnetic shielding performance, one aluminum foil needs to be integrally formed on one side of the carbon plate. It is the presence of this piece of aluminum foil that makes the structure of the carbon fiber aluminum foil sheet become "carbon fiber (nonmetallic) +aluminum foil (metallic)". Carbon fiber is a nonmetallic anisotropic material, while aluminum film is a metallic isotropic material, and the release of internal stress of the two materials is very different. Also, temperature and humidity changes caused by season changes can influence the release of internal stress, and the release of internal stress determines the flatness change of the carbon fiber aluminum foil plate. The flatness of the single-sided carbon fiber aluminum foil plate is affected by temperature and humidity, and the defect caused by the influence of the temperature and the humidity can be more than 1mm.

It should be noted that the foregoing description of the background art is only for the purpose of facilitating a clear and complete description of the technical solutions of the present application and for the convenience of understanding by those skilled in the art. The above-described solutions are not considered to be known to the person skilled in the art simply because they are set forth in the background section of the present application.

Disclosure of Invention

In view of the above-mentioned drawbacks of the prior art, an object of the present invention is to provide a carbon fiber aluminum foil plate, a flat panel detector and a manufacturing method thereof, which are used for solving the problems of poor flatness of the carbon fiber aluminum foil plate caused by differences between two materials of carbon fiber and aluminum film, temperature and humidity changes caused by seasonal changes, and the like in the prior art.

To achieve the above and other related objects, the present invention provides a carbon fiber aluminum foil board, which includes a first aluminum foil layer, a first carbon fiber prepreg layer, a second aluminum foil layer and a second carbon fiber prepreg layer sequentially laid from bottom to top.

Optionally, the thickness of the carbon fiber aluminum foil plate is 1 mm-2 mm.

Optionally, the thickness of the first aluminum foil layer and/or the second aluminum foil layer is 0.05mm to 0.1mm.

Optionally, the first carbon fiber prepreg ply and the second carbon fiber prepreg ply comprise 1-4 carbon fiber prepreg plies, and the thickness of the single-layer carbon fiber prepreg plies is 0.1-0.3 mm.

The invention also provides a flat panel detector, which comprises the carbon fiber aluminum foil plate in any scheme.

The invention also provides a preparation method of the carbon fiber aluminum foil plate in any scheme, which comprises the steps of sequentially paving the first aluminum foil layer, the first carbon fiber prepreg paving layer, the second aluminum foil layer and the second carbon fiber prepreg paving layer from bottom to top, and then carrying out compression molding.

Optionally, the preparation method comprises cutting out a first aluminum foil layer, a first carbon fiber prepreg layer, a second aluminum foil layer and a second carbon fiber prepreg layer with required sizes, and sequentially paving the first aluminum foil layer, the first carbon fiber prepreg layer, the second aluminum foil layer and the second carbon fiber prepreg layer from bottom to top.

Optionally, the process of sequentially paving the first aluminum foil layer, the first carbon fiber prepreg layer, the second aluminum foil layer and the second carbon fiber prepreg layer from bottom to top further comprises the step of removing air between paving layers by using a scraper.

Optionally, the process of sequentially laying the first aluminum foil layer, the first carbon fiber prepreg layer, the second aluminum foil layer and the second carbon fiber prepreg layer from bottom to top further comprises a step of punching holes on the surface of the second aluminum foil layer to discharge air in the first carbon fiber prepreg layer and the second carbon fiber prepreg layer.

Optionally, in the compression molding process, the temperature is 125-150 ℃ and the compression molding pressure is 100-150 KG.

As described above, the carbon fiber aluminum foil plate, the flat panel detector and the preparation method have the following beneficial effects: according to the improved structural design, a layer of aluminum foil is paved in the other side paving layer of the carbon fiber aluminum foil plate to form the approximately symmetrical two-sided aluminum foil carbon fiber plate, and meanwhile, the other side appearance surface of the carbon fiber plate is ensured to be a carbon fiber surface, so that the flatness of the carbon fiber aluminum foil plate in a temperature range of-40 ℃ to 60 ℃ can be ensured to be less than 1mm. Better flatness makes it adsorb on CNC processing tool more easily, can obtain higher CNC processing yield, and can need not plastic process after processing, improves production efficiency. In addition, when the device is assembled with the whole machine, a higher one-time assembly success rate can be obtained. The double-sided aluminum foil carbon fiber aluminum foil plate has better rigidity, can better resist the deformation of the carbon plate caused by external force in the transportation process, can be stored for a longer time, and has longer storage life.

Drawings

Fig. 1 is a schematic diagram showing an exploded structure of a carbon fiber aluminum foil plate according to the present invention.

Detailed Description

Other advantages and effects of the present invention will become apparent to those skilled in the art from the following disclosure, which describes the embodiments of the present invention with reference to specific examples. The invention may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present invention. As described in detail in the embodiments of the present invention, the cross-sectional view of the device structure is not partially enlarged to a general scale for convenience of explanation, and the schematic drawings are only examples, which should not limit the scope of the present invention. In addition, the three-dimensional dimensions of length, width and depth should be included in actual fabrication.

For ease of description, spatially relative terms such as "under", "below", "beneath", "above", "upper" and the like may be used herein to describe one element or feature's relationship to another element or feature as illustrated in the figures. It will be understood that these spatially relative terms are intended to encompass other orientations of the device in use or operation in addition to the orientation depicted in the figures. Furthermore, when a layer is referred to as being "between" two layers, it can be the only layer between the two layers or one or more intervening layers may also be present.

In the context of this application, a structure described as a first feature being "on" a second feature may include embodiments where the first and second features are formed in direct contact, as well as embodiments where additional features are formed between the first and second features, such that the first and second features may not be in direct contact.

It should be noted that, the illustrations provided in the present embodiment merely illustrate the basic concept of the present invention by way of illustration, and only the components related to the present invention are shown in the drawings and are not drawn according to the number, shape and size of the components in actual implementation, and the form, number and proportion of the components in actual implementation may be arbitrarily changed, and the layout of the components may be more complex. In order to make the illustration as concise as possible, not all structures are labeled in the drawings.

As shown in fig. 1, the present invention provides a carbon fiber aluminum foil plate, and more particularly, a flat panel detector carbon fiber aluminum foil plate. The carbon fiber aluminum foil plate comprises a first aluminum foil layer 11, a first carbon fiber prepreg layer 12, a second aluminum foil layer 13 and a second carbon fiber prepreg layer 14 which are sequentially paved from bottom to top. That is, the first aluminum foil layer 11, the first carbon fiber prepreg ply 12, the second aluminum foil layer 13, and the second carbon fiber prepreg ply 14 are laminated in this order from bottom to top, and the layers are closely bonded together by press molding to form a desired structure. The shape and size of each structural layer depends on the product to be prepared, and when used in flat panel detectors, each layer is typically rectangular with the same or nearly the same dimensions.

According to the improved structural design, a layer of aluminum foil is paved in the other side paving layer of the carbon fiber aluminum foil plate, so that the approximately symmetrical two-sided aluminum foil carbon fiber plate is formed, the appearance surface of the other side of the carbon fiber plate is ensured to be a carbon fiber surface, the flatness of the carbon fiber aluminum foil plate can be ensured to be less than 1mm (even controlled within 0.5 mm) in a temperature range of-40-60 ℃. Better flatness makes it adsorb on CNC processing tool more easily, can obtain higher CNC processing yield, and can need not plastic process after processing, improves production efficiency. In addition, when the device is assembled with the whole machine, a higher one-time assembly success rate can be obtained. The double-sided aluminum foil carbon fiber aluminum foil plate has better rigidity, can better resist the deformation of the carbon plate caused by external force in the transportation process, can be stored for a longer time, and has longer storage life.

The thickness of the carbon fiber aluminum foil plate may be determined according to the product used. When it is used in flat panel detectors, the thickness requirement is higher and neither too thick nor too thin. The inventor finds that the requirements of most flat panel detectors on the market can be met when the thickness of the flat panel detector is 1-2 mm through a large number of experiments.

In the case where the overall thickness of the carbon fiber aluminum foil sheet is 1mm to 2mm, the thickness of each structural layer needs to be carefully distributed. The thickness of each structural layer may be the same or different, for example, the thickness of the first aluminum foil layer 11 and the second aluminum foil layer 13 may be the same or different, and the thickness of the first carbon fiber prepreg ply 12 and the second carbon fiber prepreg ply 14 may be the same or different. In a preferred example, the thickness of the first aluminum foil layer 11 and/or the second aluminum foil layer 13 is 0.05mm to 0.1mm, for example 0.05mm, or 0.085mm. The first carbon fiber prepreg ply 12 and the second carbon fiber prepreg ply 14 include 1 to 4 carbon fiber prepreg layers, and the thickness of a single carbon fiber prepreg layer is 0.1mm to 0.3mm, for example, 0.1mm or 0.15mm.

The carbon fiber aluminum foil plate provided by the invention has excellent X-ray permeability and electromagnetic shielding performance, and also has excellent performances of anti-collision, anti-scratch, easy cleaning, dampproof, fireproof, mold proof without penetrating surface, anti-static, chemical corrosion resistance, oxidation resistance and the like, so that the carbon fiber aluminum foil plate is particularly suitable for flat panel detectors, especially DR flat panel detectors. Of course, the carbon fiber aluminum foil plate can also be used for preparing other similar medical devices or for other purposes.

The invention also provides a flat panel detector, and more particularly relates to a DR flat panel detector. The flat panel detector comprises the carbon fiber aluminum foil plate as described in any of the above schemes, so the foregoing may be incorporated by reference herein in its entirety for brevity. When used in flat panel detectors, the carbon fiber aluminum foil plate can be generally used as an X-ray incidence window, and is arranged on the surface of a structural layer such as a scintillator layer of the detector. The flat panel detector provided by the application has no obvious difference with the existing flat panel detector except that the carbon fiber aluminum foil plate is used as an X-ray incidence window. Since the structure of the flat panel detector is known to those skilled in the art, this will not be elaborated upon.

The invention also provides a preparation method of the carbon fiber aluminum foil plate in any scheme, which comprises the steps of sequentially paving the first aluminum foil layer 11, the first carbon fiber prepreg paving layer 12, the second aluminum foil layer 13 and the second carbon fiber prepreg paving layer 14 from bottom to top, and then carrying out compression molding. The specific thickness of each structural layer may be referred to in the foregoing description, and is not repeated for the sake of brevity.

In an example, the preparation method includes cutting out the first aluminum foil layer 11, the first carbon fiber prepreg ply 12, the second aluminum foil layer 13 and the second carbon fiber prepreg ply of the required size, and then sequentially laying out the first aluminum foil layer 11, the first carbon fiber prepreg ply 12, the second aluminum foil layer 13 and the second carbon fiber prepreg ply 14 from bottom to top. I.e. firstly, designing a layer according to the thickness of the product, then paving a first carbon fiber prepreg layer 12 of the middle layer, then cutting a second aluminum foil layer 13 with a corresponding size according to the outline dimension of the prepreg laminate, and paving the second aluminum foil layer on the first carbon fiber prepreg layer 12. In order to facilitate the evacuation of air from the prepreg layers (including the first carbon fiber prepreg ply 12 already laid at this time and the second carbon fiber prepreg ply 14 to be laid later), small holes may be punched in the surface of the first aluminum foil layer 11, for example, the pore diameter of the small holes is within 0.01mm, then the second carbon fiber prepreg ply 14 (generally 1-4 layers depending on the actual ply thickness) of the outermost layer is laid, then the second aluminum foil layer 13 of the corresponding size is cut depending on the external dimensions of the prepreg laminate, laid on the second carbon fiber prepreg ply 14, and finally the laid and formed uncured double-sided carbon fiber aluminum foil sheet is put into a metal mold and is subjected to a certain temperature and pressure to be formed into the desired carbon fiber aluminum foil sheet. Of course, in other examples, the respective structural layers may be sequentially laid and cut together, and then compression molding may be performed. But firstly cutting out each material layer with the required size, so that the surface flatness of each material layer can be better controlled, and the edge burrs and cutting stains of each material layer can be treated in time after each cutting, for example, an art designer knife and dust-free cloth are adopted to remove the edge short filaments and the stains, thereby being beneficial to improving the yield of compression molding. The cutting of the material layers can be determined according to the raw material conditions, for example, the cutting of the aluminum foil layer can be performed by placing the aluminum foil roll on an unreeling device, unreeling the aluminum foil roll to a required size and then cutting the aluminum foil roll by using a cutting blade moving at a high speed.

The above-mentioned process of laying each layer may be manual laying, but in the process of laying the first aluminum foil layer 11, the first carbon fiber prepreg layer 12, the second aluminum foil layer 13 and the second carbon fiber prepreg layer 14 in this order from bottom to top, a scraper may be used to remove air between the layers. The blade is preferably a plastic blade to prevent scratches and static electricity from being generated on the surface of the mat. After each application of a layer of material, the material is inspected, for example by visual inspection or by means of an inspection device, and the possible impurities are cleaned with a clean dust-free cloth. Specifically, the cut material layers can be paved on the forming die layer by layer, paving is performed according to the paving angle requirement in the paving process, and the paved structure can be integrally transferred to the forming die after the paving of all the material layers is completed on the paving workbench and then put into the die pressing equipment. After the paving of each layer is finished, the surface flatness of the paving layer can be detected by means of a non-contact optical detection device, and if the condition that the surface is uneven is found, the air is exhausted and smoothed in time by adopting a scraping plate or vacuumizing mode. Of course, in other examples, the surface flatness may be detected after the final layer is applied, but the former method can ensure that the flatness of the inner part and the surface of the finally prepared carbon fiber aluminum foil plate is higher, which has important significance for ensuring the X-ray transmission performance of the carbon fiber aluminum foil plate. In any event, it is necessary to ensure cleanliness and care to prevent static electricity throughout the paving work environment.

The temperature and pressure during compression molding are critical to the quality of the final finished product, for example, too low a pressure may make it difficult to ensure a tight fit of the layers, whereas if too high a pressure may cause damage to the layers, especially deformation of the aluminum foil layer. The inventors have found through a lot of experiments that when preparing the carbon fiber aluminum foil plate with the thickness of 1 mm-2 mm, the temperature is preferably 125-150 ℃, the molding pressure is preferably 100-150 KG, and the molding time is preferably 30-60 min. After compression molding, the finished product is inspected, for example, flash at the edge is required to be processed or removed.

In summary, the invention provides a carbon fiber aluminum foil plate, a flat panel detector and a preparation method. The carbon fiber aluminum foil plate comprises a first aluminum foil layer, a first carbon fiber prepreg layer, a second aluminum foil layer and a second carbon fiber prepreg layer which are sequentially paved from bottom to top. According to the improved structural design, a layer of aluminum foil is paved in the other side paving layer of the carbon fiber aluminum foil plate to form the approximately symmetrical two-sided aluminum foil carbon fiber plate, and meanwhile, the other side appearance surface of the carbon fiber plate is ensured to be a carbon fiber surface, so that the flatness of the carbon fiber aluminum foil plate in a temperature range of-40 ℃ to 60 ℃ can be ensured to be less than 1mm. Better flatness makes it adsorb on CNC processing tool more easily, can obtain higher CNC processing yield, and can need not plastic process after processing, improves production efficiency. In addition, when the device is assembled with the whole machine, a higher one-time assembly success rate can be obtained. The double-sided aluminum foil carbon fiber aluminum foil plate has better rigidity, can better resist the deformation of the carbon plate caused by external force in the transportation process, can be stored for a longer time, and has longer storage life.

Therefore, the invention effectively overcomes various defects in the prior art and has high industrial utilization value.

The above embodiments are merely illustrative of the principles of the present invention and its effectiveness, and are not intended to limit the invention. Modifications and variations may be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the invention. Accordingly, it is intended that all equivalent modifications and variations of the invention be covered by the claims, which are within the ordinary skill of the art, be within the spirit and scope of the present disclosure.

Claims (10)

1. The carbon fiber aluminum foil plate is characterized by comprising a first aluminum foil layer, a first carbon fiber prepreg layer, a second aluminum foil layer and a second carbon fiber prepreg layer which are sequentially paved from bottom to top.

2. The carbon fiber aluminum foil sheet according to claim 1, wherein the carbon fiber aluminum foil sheet has a thickness of 1mm to 2mm.

3. The carbon fiber aluminum foil sheet according to claim 2, wherein the thickness of the first aluminum foil layer and/or the second aluminum foil layer is 0.05mm to 0.1mm.

4. The carbon fiber aluminum foil plate according to claim 2, wherein the first carbon fiber prepreg ply and the second carbon fiber prepreg ply comprise 1 to 4 carbon fiber prepreg plies, and the single-layer carbon fiber prepreg ply has a thickness of 0.1 to 0.3mm.

5. A flat panel detector comprising the carbon fiber aluminum foil sheet of any one of claims 1 to 4.

6. A method of producing a carbon fiber aluminum foil sheet as claimed in any one of claims 1 to 4, comprising the steps of sequentially laying a first aluminum foil layer, a first carbon fiber prepreg layer, a second aluminum foil layer and a second carbon fiber prepreg layer from bottom to top, and then compression molding.

7. The method according to claim 6, wherein the method comprises cutting a first aluminum foil layer, a first carbon fiber prepreg layer, a second aluminum foil layer and a second carbon fiber prepreg layer of a desired size, and sequentially laying the first aluminum foil layer, the first carbon fiber prepreg layer, the second aluminum foil layer and the second carbon fiber prepreg layer from bottom to top.

8. The method according to claim 6, wherein the step of sequentially laying the first aluminum foil layer, the first carbon fiber prepreg layer, the second aluminum foil layer and the second carbon fiber prepreg layer from bottom to top further comprises the step of exhausting air between the layers by using a scraper.

9. The method of claim 6, wherein the step of sequentially laying the first aluminum foil layer, the first carbon fiber prepreg ply, the second aluminum foil layer and the second carbon fiber prepreg ply from bottom to top further comprises the step of punching holes in the surface of the second aluminum foil layer to exhaust air in the first carbon fiber prepreg ply and the second carbon fiber prepreg ply.

10. The method according to any one of claims 6 to 9, wherein the molding temperature is 125 ℃ to 150 ℃ and the molding pressure is 100KG to 150KG.

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