Disclosure of Invention
The invention provides a method for integrally compression-molding a fiber reinforced composite material-leather sheet and the sheet, which aim to overcome the defects of the prior art.
In order to achieve the above purpose, the present invention provides the following technical solutions:
in a first aspect, embodiments of the present invention provide a method for integrally compression molding a fiber reinforced composite-leather sheet, the method including:
providing a prepreg and leather, wherein the prepreg is a mixed material of fibers and synthetic resin;
cutting and laminating the prepreg to obtain a prepreg to be pressed;
curing and molding the prepreg to be pressed and the leather to obtain a cured molded body;
and machining the edges and the structural positions of the solidified molded body by using CNC technology to obtain a target sheet.
Further, in the method for integrally molding the fiber reinforced composite material-leather sheet, the step of cutting and laminating the prepreg to obtain the prepreg to be pressed comprises the following steps:
cutting the prepreg to form a cut prepreg with a required size;
and laminating the cut prepregs to obtain the prepreg to be pressed.
Further, in the method for integrally molding the fiber reinforced composite material-leather sheet, the step of curing and molding the prepreg to be molded and the leather to obtain a cured molded body comprises the following steps:
providing a mould;
and putting the prepreg to be pressed and the leather into a die cavity of the die for curing and molding to obtain a cured molded body.
Further, in the method of integrally molding a fiber-reinforced composite-leather-molded sheet, the step of providing a mold includes:
providing a mould;
and pretreating the mold.
Further, in the method for integrally molding the fiber reinforced composite material-leather sheet, the step of placing the prepreg to be molded and the leather into a mold cavity of the mold for curing molding to obtain a cured molded body comprises:
placing the prepreg to be pressed and the leather into a mold cavity of the mold;
and heating the mould to a molding temperature, and curing and molding the prepreg to be pressed and the leather to obtain a cured molded body.
Further, in the method of integrally molding a fiber reinforced composite-leather molded sheet, the step of processing the edges and the structural positions of the cured body using the CNC technology to obtain the target sheet includes:
processing the edge and the structural position of the solidified body by using a CNC (computer numerical control) machine tool to obtain a target sheet;
wherein, the rotational speed of CNC digit control machine tool is 12 ten thousand revolutions per minute.
Further, in the method for integrally compression-molding the fiber reinforced composite material-leather sheet, the fiber is any one or combination of glass fiber, carbon fiber, aramid fiber, ultra-high molecular weight polyethylene fiber and alumina fiber.
Further, in the method for integrally molding the fiber reinforced composite material-leather sheet, the synthetic resin is any one or combination of epoxy resin and modified epoxy resin.
Further, in the method for integrally molding the fiber reinforced composite material-leather sheet, the leather is any one or combination of polyurethane leather and silica gel leather.
In a second aspect, embodiments of the present invention provide a sheet obtained by the method of integrally press-molding a dimension reinforced composite-leather-molded sheet as described in the first aspect.
Compared with the prior art, the embodiment of the invention has the following beneficial effects:
according to the method for integrally molding the fiber reinforced composite material-leather into the sheet and the sheet, the prepreg to be pressed comprising the fibers and the synthetic resin and the leather are integrally molded during curing molding, so that the fiber and synthetic resin mixed material is firmly combined with the leather due to thermosetting, and the edge and the structural position are machined by using a CNC (computerized numerical control) technology after the fiber and synthetic resin mixed material is integrally molded, so that the problem of offset is avoided, in addition, the integral molding time is effectively shortened, the time is saved by about 20-30%, and the production efficiency can be improved.
Detailed Description
In order to make the objects, features and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the embodiments described below are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present.
Furthermore, the terms "long", "short", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing the present invention, but do not indicate or imply that the referred devices or elements must have the specific orientations, be configured to operate in the specific orientations, and thus are not to be construed as limitations of the present invention.
The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.
Example one
In view of the defects of the prior art, the inventor of the invention actively researches and innovates based on practical experience and professional knowledge which are abundant in years in the industry and by matching with the application of theory, so as to create a feasible fiber reinforced composite material-leather integrated compression molding sheet technology, and the technology is more practical. After continuous research, design and repeated trial and improvement, the invention with practical value is finally created.
Referring to fig. 1, fig. 1 is a schematic flow chart of a method for integrally molding a fiber reinforced composite-leather sheet according to an embodiment of the present invention, and the method is suitable for manufacturing a sheet such as a leather-attached rear cover of a fiber reinforced composite. As shown in fig. 1, the method of integrally molding a fiber reinforced composite-leather-molded sheet may include the steps of:
s101, providing a prepreg and leather, wherein the prepreg is a mixed material of fibers and synthetic resin;
the fiber is any one or combination of glass fiber, carbon fiber, aramid fiber, ultra-high molecular weight polyethylene fiber and alumina fiber.
The synthetic resin is any one or combination of epoxy resin and modified epoxy resin.
The leather is any one or combination of polyurethane leather and silica gel leather.
It should be noted that the prepreg in this embodiment is a resin-based/reinforcing material assembly made by impregnating continuous fibers, woven fabrics and chopped fibers with a resin matrix under certain bulk conditions, and is a form of material for manufacturing advanced composite parts.
Specifically, there is no particular requirement for the selection of the prepreg in this embodiment, and it may refer to the conventional selection in the art as long as it includes fibers and synthetic resin (i.e., fiber-reinforced composite material).
S102, cutting and laminating the prepreg to obtain the prepreg to be pressed;
the cutting is a process of cutting the prepreg into a desired size according to the process requirements and the size.
Preferably, the step S102 may be further optimized to include the following steps:
cutting the prepreg to form a cut prepreg with a required size;
and laminating the cut prepregs to obtain the prepreg to be pressed.
S103, curing and molding the prepreg to be pressed and the leather to obtain a cured molded body;
it should be noted that, in this embodiment, the prepreg to be pressed and the leather are integrally cured and molded, so that the prepreg to be pressed and the leather are bonded together by thermosetting of resin, and compared with a hot melt adhesive film bonding mode adopted in the prior art, the bonding mode of this embodiment has a strong bonding force, almost no risk of adhesive failure exists, and time for hot press bonding is saved.
Preferably, the step S103 may be further optimized to include the following steps:
providing a mould;
and putting the prepreg to be pressed and the leather into a die cavity of the die for curing and molding to obtain a cured molded body.
It should be noted that, in order to facilitate the efficient integral curing and molding of the prepreg to be pressed and the leather, in this embodiment, a mold is used to cure and mold the prepreg to be pressed and the leather.
Preferably, the step of providing a mould may be further optimised to include the steps of:
providing a mould;
and pretreating the mold.
It should be noted that preheating refers to the preparation of the mold before molding, such as cleaning the mold in order to avoid the influence of impurities on the curing and forming, and/or heating the mold to a proper temperature in advance, which is generally not high in order to maintain the dryness of the cleaned mold, and/or applying a release agent in the mold in order to facilitate the quick release of the cured molded body obtained after curing and forming.
Preferably, the step of placing the prepreg to be pressed and the leather into the mold cavity of the mold for curing molding to obtain a cured molded body is further optimized to include the following steps:
placing the prepreg to be pressed and the leather into a mold cavity of the mold;
and heating the mould to a molding temperature, and curing and molding the prepreg to be pressed and the leather to obtain a cured molded body.
In this case, the molding temperature of the mold is different from the temperature at the time of the preheating and is much higher than the temperature at the time of the preheating. And at the molding temperature, the prepreg to be pressed and the leather can be integrally cured and molded.
And S104, processing the edge and the structural position of the cured molded body by utilizing a CNC (computerized numerical control) technology to obtain a target sheet.
It should be noted that, in the embodiment, the edge and the structural position of the cured body are processed by using the CNC technology after the prepreg is integrally molded, so that there is no problem of alignment deviation between the prepreg to be pressed and the leather.
Preferably, the step S104 may be further optimized to include the following steps:
processing the edge and the structural position of the solidified body by using a CNC (computer numerical control) machine tool to obtain a target sheet;
wherein, the rotational speed of CNC digit control machine tool is 12 ten thousand revolutions per minute.
According to the method for integrally molding the fiber reinforced composite material-leather sheet by compression molding, the prepreg to be molded, which comprises the fibers and the synthetic resin, and the leather are integrally molded during curing molding, so that the fiber and synthetic resin mixed material is firmly combined with the leather due to thermosetting, and the edge and the structural position are processed by using a CNC (computerized numerical control) technology after the fiber and synthetic resin mixed material is integrally molded, so that the problem of offset is avoided, in addition, the integral molding time is effectively shortened, the time is saved by about 20-30%, and the production efficiency can be improved.
Example two
Referring to fig. 2, a second embodiment of the present invention provides a sheet, which is manufactured by the method of integrally molding the fiber reinforced composite-leather into the sheet according to the first embodiment, and includes a fiber reinforced composite 1 and leather 2 tightly combined with the fiber reinforced composite 1.
The manufactured sheet may be, for example, a rear cover of an electronic product such as a mobile phone and a tablet computer, or may be another 3D sheet.
According to the sheet provided by the embodiment of the invention, the prepreg to be pressed, which comprises the fibers and the synthetic resin, and the leather are integrally molded during curing molding, so that the mixed material of the fibers and the synthetic resin is firmly combined with the leather due to thermosetting property, and the edge and the structural position are processed by using a CNC (computerized numerical control) technology after the integrated molding, so that the problem of offset is avoided, in addition, the integral molding time is effectively shortened, the time is saved by about 20-30%, and the production efficiency can be improved.
The foregoing description of the embodiments has been presented for the purposes of illustration and description. It is not intended to be exhaustive or to limit the disclosure. Individual elements or features of a particular embodiment are generally not limited to that particular embodiment, but, where applicable, are interchangeable and can be used in a selected embodiment, even if not specifically shown or described. The same elements or features may also vary in many respects. Such variations are not to be regarded as a departure from the disclosure, and all such modifications are intended to be included within the scope of the disclosure.
Example embodiments are provided so that this disclosure will be thorough and will fully convey the scope to those skilled in the art. Numerous details are set forth, such as examples of specific parts, devices, and methods, in order to provide a thorough understanding of embodiments of the present disclosure. It will be apparent to those skilled in the art that specific details need not be employed, that example embodiments may be embodied in many different forms and that neither should be construed to limit the scope of the disclosure. In certain example embodiments, well-known processes, well-known device structures, and well-known technologies are not described in detail.
The terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises" and "comprising" are intended to be inclusive and therefore specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order discussed and illustrated, unless explicitly indicated as an order of performance. It should also be understood that additional or alternative steps may be employed.
When an element or layer is referred to as being "on" … … "," engaged with "… …", "connected to" or "coupled to" another element or layer, it can be directly on, engaged with, connected to or coupled to the other element or layer, or intervening elements or layers may also be present. In contrast, when an element or layer is referred to as being "directly on … …," "directly engaged with … …," "directly connected to" or "directly coupled to" another element or layer, there may be no intervening elements or layers present. Other words used to describe the relationship of elements should be interpreted in a similar manner (e.g., "between … …" and "directly between … …", "adjacent" and "directly adjacent", etc.). As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items. Although the terms first, second, third, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms may be only used to distinguish one element, component, region or section from another element, component, region or section. Unless clearly indicated by the context, use of terms such as the terms "first," "second," and other numerical values herein does not imply a sequence or order. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the example embodiments.
Spatially relative terms, such as "inner," "outer," "below," "… …," "lower," "above," "upper," and the like, may be used herein for ease of description to describe a relationship between one element or feature and one or more other elements or features as illustrated in the figures. Spatially relative terms may be intended to encompass different orientations of the device in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" the other elements or features. Thus, the example term "below … …" can encompass both an orientation of facing upward and downward. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted.