Method for manufacturing casing with textile fiber grain

[0046] Please refer to FIGS. 3 and 4 at the same time. FIG. 3 is a schematic diagram of the manufacturing method of the embodiment of the present invention, and FIG. 4 is a schematic diagram of the manufacturing of the housing with woven fiber patterns according to the embodiment of the present invention. The manufacturing method of the shell with woven fiber patterns of the present invention mainly includes covering the upper and lower surfaces of a woven fiber cloth impregnated with resin 20 with TPU film 30 respectively, and then performing flat plate hot pressing. After that, a PET film 50 is bonded to the upper and lower surfaces of the hot-pressed plate, and then further shaped and processed to form the finished shell 62.

[0047] The manufacturing method of the embodiment of the present invention includes the following steps: (1) providing a woven fiber cloth impregnated resin material S21; (2) covering the upper and lower surfaces of the woven fiber cloth impregnated resin material with a thermoplastic polyurethane (Thermoplastic Polyurethane, TPU) film S22; (3) Placed in a flat mold for hot pressing to form a plastic shell sheet S23; (4) Use an adhesive to bond a poly-terephthalene on the upper and lower surfaces of the plastic shell sheet Polyethyleneterephthalate (PET) film S24; (5) Placed in the flat mold and pressurized to form a processed shell sheet S25; (6) Cut the processed shell sheet into a predetermined shape and size S26; and (7) secondary processing and molding into the mold to form a finished shell product S27 of a predetermined configuration. Among them, hot pressing, related cooling, demolding and other steps are generally existing technologies in the industry and will not be further described here.

[0048] In the embodiment of the present invention, the woven fiber cloth impregnated with the resin material 20 and the TPU film 30 can be bonded to each other by means of self-bonding during the heating process during the hot pressing process, so there is no need to bond through an adhesive. The hot pressing in step S23 is performed in a flat mold, the temperature is 130°C to 150°C, and the pressure is 60Kg/cm 2 ~100Kg/cm 2. The plastic shell sheet 40 formed by hot-compression bonding includes 30 layers of TPU film to trim and cover the pits or irregularities on the surface of the original woven fiber cloth impregnated with the resin material 20. In addition, in the present invention, since a flat plate is used for hot pressing, pits or unevenness that may be generated during the hot pressing of the bending shape can be avoided at the same time. Therefore, the surface of the plastic shell sheet 40 formed by the method of the present invention is quite flat and has a bright feeling. Therefore, by virtue of this simple processing step, the existing repairing process that consumes time, manpower, and cost can be omitted, and the required manufacturing cost can be greatly reduced.

[0049] The 30 layers of the TPU film can be a single layer or several layers, which can be adjusted according to the desired structural strength and the desired fiber pattern effect, and there is no special limitation here.

[0050] The plastic shell plate 40 is a plate material that has been hot-pressed by a flat plate, which could have been directly cut into an appropriate size and then molded. However, in order to make the material of the shell with woven fiber texture obtained in the present invention show a better thickness texture, the plastic shell sheet 40 in the embodiment of the present invention will have a PET film 50 adhered to its upper and lower surfaces by means of an adhesive. After bonding, a flat plate is used for pressure treatment again, so that the PET film 50 is tightly attached to the plastic shell plate 40 to form a shell plate 60 to be processed. The bonding of the shell plate 60 to be processed through the PET film 50 can not only increase its thickness and texture, but also increase the strength of the plate at the same time. In addition to pasting a PET film, it can also be pasted with polycarbonate (PC), acrylonitrilebutadiene-styrene (ABS) or polypropylene (PP), etc. Similar to thermoplastic film.

[0051] After that, the shell plate 60 to be processed may undergo a cutting step to cut the large-area plate into a desired size, and then the cut shell plate 61 to be processed is processed for a second time. There is no special restriction on the way of the second processing and forming, and it can be general hot pressing or high-frequency pressing. When forming, the cut shell plate 61 to be processed is placed in the mold M2 and processed in the aforementioned manner to produce a finished shell 62 with a predetermined configuration.

[0052] In the embodiment of the present invention, the base material 201 of the woven fiber cloth impregnated resin material 20 is a polyurethane, but it is not limited to this, and can also be other thermoplastic resins, such as acrylonitrile-butadiene-propylene-benzene Ethylene copolymer resin, polybutylene terephthalate, polyphenylene sulfide, polyetherimide, or others such as polypropylene, polyamide, polyethylene, polystyrene, polyvinyl chloride, polycarbonate , Or for example: epoxy resin, vinyl ester (vinyl ester) resin, unsaturated polyester (polyester) resin and other thermosetting resins. However, in order to match the bonding strength with the TPU film 30, it is preferable to select a resin material with properties similar to TPU or strong bonding, so that the TPU film 30 is not easily separated from the woven fiber cloth impregnated resin material 20 and falls off.

[0053] In addition, the woven fiber fabric 202 in the woven fiber cloth impregnated with the resin material 20 can be formed by a roving processing method such as chopped strand, chopped strand mat, and woven fabric. Methods such as woven roving or needle stitching to form evenly dispersed or woven fiber patterns; or yarn-based processing methods, plain weave, mesh flat weave, and twill weave Weave (twill weave) or satin weave (stain weave), etc., to form a fiber cloth with woven fiber patterns, but it is not limited to the foregoing.

[0054] The TPU film 30 or the PET film 50 (or other similar thermoplastic films) can be transparent, translucent, dyed or printed with patterns. By virtue of the color or pattern and the texture of the woven fiber 202, the special texture and appearance of the texture can be presented, so that the shell manufactured by the method of the present invention has a changeable surface shape, so that it can be used in structural materials. It can be extended to be used in daily household appliances, containers, packaging boxes, furniture, and accessories to make it more popular in use and use.

[0055] Please continue to refer to FIG. 3, the aforementioned finished product of the shell 62 with a predetermined configuration can be applied to many product structures. In step S28, the housing 62 can be fixed on the surface of a plastic or metal piece by various methods such as gluing, so that the appearance of the plastic or metal piece can present a completely different texture and have woven fibers Decorative effect of texture. On the other hand, it can be placed in a mold for injection molding as in step S29, and a product with a shell 62 embedded on the surface can be formed, and it also has the texture and decorative effect presented by the woven fiber pattern.