METHOD FOR MANUFACTURING ANTIBACTERIAL COPPER NANOFIBER BY INJECTION MOLDING

Abstract

A method for manufacturing an antibacterial copper nanofiber by injection molding includes the following steps: raw material mixing operation: mixing dry copper nanopowder having an averaged particle size of not more than 48 nm with a fiber raw material to form a mixed raw material; and injection molding operation, including plasticization, filling, pressurization, cooling, ejection, and product injection. Finally, an antibacterial copper nanofiber injection product is obtained. Or in the raw material mixing operation, after mixing a dry copper nanopowder having an averaged particle size of not more than 48 nm with a fiber raw material to form a mixed raw material, mixing and granulating operation can be added, including heating, blending, extruding and granulating the mixed raw material through a mixer, and then melting to form a plurality of antibacterial copper nano-masterbatches; and then injection molding operation is performed to obtain an antibacterial copper nanofiber injection product.

Claims

1. A method for manufacturing an antibacterial copper nanofiber by injection molding, comprising the following steps: raw material mixing operation: mixing dry copper nanopowder having an averaged particle size of not more than 48 nm with a fiber raw material to form a mixed raw material; and injection molding operation, comprising: plasticization: loading a hopper of an injection machine with the mixed raw material, transferring the mixed raw material from the hopper into a barrel, extruding the mixed raw material with a screw in the barrel to turn the mixed raw material into a molten state by frictional heating, and maintaining the melting temperature of the mixed raw material by using a heater; filling: pushing the screw to pour the molten mixed raw material into a mold cavity of a mold in a closed state through a discharge port of the barrel; pressurization: after filling the mold cavity with the molten mixed raw material, continuing to apply high pressure and adding the mixed raw material until a pouring gate is solidified; cooling: cooling the mixed raw material in the mold cavity; ejection: opening the mold and ejecting the cooled and formed mixed raw material out of the mold cavity; and product injection: removing a runner system and waste materials to produce an antibacterial copper nanofiber injection product.

2. The method for manufacturing an antibacterial copper nanofiber by injection molding of claim 1, wherein the copper nanopowder is mixed with the fiber raw material in a weight percentage range of 0.1%-30%.

3. The method for manufacturing an antibacterial copper nanofiber by injection molding of claim 1, wherein the copper nanopowder is added to the fiber raw material in a weight percentage range of 20%-24%.

4. The method for manufacturing an antibacterial copper nanofiber by injection molding of claim 1, wherein the fiber raw material comprises thermoplastic polyurethane (TPU), thermoplastic rubber (TPR), polyethylene (PE), polypropylene (PP), polyethylene terephthalate (PET), polyamide (PA), polybutylene terephthalate (PBT), ethylene-vinyl acetate copolymer (EVA) or nylon.

5. The method for manufacturing an antibacterial copper nanofiber by injection molding of claim 1, wherein during the step of raw material mixing operation, a toning colorant can be further added.

6. A method for manufacturing an antibacterial copper nanofiber by injection molding, comprising the following steps: raw material mixing operation: mixing dry copper nanopowder having an averaged particle size of not more than 48 nm with a fiber raw material to form a mixed raw material; mixing and granulating operation: heating, blending, extruding and granulating the mixed raw material through a mixer, and then melting to form a plurality of antibacterial copper nano-masterbatches; and injection molding operation, comprising: plasticization: loading a hopper of an injection machine with the antibacterial copper nano-masterbatches and a plurality of thermoplastic polyurethane colloidal particles to form a mixed material, transferring the mixed material from the hopper into a barrel, extruding the mixed material with a screw in the barrel to turn the mixed material into a molten state by frictional heating, and maintaining the melting temperature of the mixed material by using a heater; filling: pushing the screw to pour the molten mixed material into a mold cavity of a mold in a closed state through a discharge port of the barrel; pressurization: after filling the mold cavity with the molten mixed material, continuing to apply high pressure and adding the mixed material until a pouring gate is solidified; cooling: cooling the mixed material in the mold cavity; ejection: opening the mold and ejecting the cooled and formed mixed material out of the mold cavity; and product injection: removing a runner system and waste materials to produce an antibacterial copper nanofiber injection product.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0021] FIG. 1 is a flow chart of a method for manufacturing an antibacterial copper nanofiber by injection molding according to an embodiment of the present invention.

[0022] FIG. 2 is a flow chart of a method for manufacturing an antibacterial copper nanofiber by injection molding according to another embodiment of the present invention.

[0023] FIG. 3 to FIG. 6 are schematic diagrams of the equipment flow of the method for manufacturing an antibacterial copper nanofiber by injection molding of the embodiment in FIG. 1 of the present invention.

DETAILED DESCRIPTION

[0024] Embodiments of the present invention are described in detail below with reference to the accompanying drawings, the accompanying drawings are mainly simplified schematic diagrams, and only exemplify the basic structure of the present invention schematically. Therefore, only the components related to the present invention are shown in the drawings, and are not drawn according to the quantity, shape, and size of the components during actual implementation. During actual implementation, the specification of size of the components is actually an optional design, and the layout of the components may be more complicated.

[0025] In addition, the drawings may not be necessarily drawn to scale. For example, sizes of some components in the drawings may be increased or reduced, to illustrate improvements on understanding of various implementations. Similarly, to discuss some of the implementations, some components and/or operations may be divided into different blocks or combined into a single block. In addition, although specific embodiments are exemplarily shown in the drawings and described below in detail, any modification, equivalent, or replacement that can be figured out by a person skilled in the art shall fall within the scope of the appended claims.

[0026] Embodiment I

[0027] Refer to FIG. 1 and FIG. 3 to FIG. 6, which are a flow chart of and a schematic diagram of equipment flow of a method for manufacturing an antibacterial copper nanofiber by injection molding according to an embodiment of the present invention. The steps of the present embodiment include: raw material mixing operation (step S11) and injection molding operation (step S12).

[0028] The raw material mixing operation (step S11) is to mix dry copper nanopowder 1 having an averaged particle size of not more than 48 nm with a fiber raw material 2 to form a mixed raw material.

[0029] The injection molding operation (step S12) includes the following steps: plasticization (step S121), filling (step S122), pressurization (step S123), cooling (step S124), ejection (step S125), and product injection (step S126).

[0030] The plasticization step (step S121) is to load a hopper 31 of an injection machine 3 with the mixed raw material, transfer the mixed raw material from the hopper 31 into a barrel 32, extrude the mixed raw material with a screw 33 in the barrel 32 to turn the mixed raw material into a molten state by frictional heating, and maintain the melting temperature of the mixed raw material by using a heater 4, as shown in FIG. 3.

[0031] The filling step (step S122) is to push the screw 33 to pour the molten mixed raw material into a mold cavity of a mold in a closed state through a discharge port of the barrel 32, as shown in FIG. 4-FIG. 5.

[0032] The pressurization step (step S123) is to, after filling the mold cavity with the molten mixed raw material, continue to apply high pressure and to add the mixed raw material until a pouring gate 6 is solidified.

[0033] The cooling step (step S124) is to cool the mixed raw material in the mold cavity 51.

[0034] The ejection step (step S125) is to open the mold 5 and eject the cooled and formed mixed raw material out of the mold cavity 51, as shown in FIG. 6.

[0035] The product injection step (step S126) is to remove a runner system and waste materials to produce an antibacterial copper nanofiber injection product P.

[0036] Embodiment II

[0037] Refer to FIG. 2, which is a flow chart of a method for manufacturing an antibacterial copper nanofiber by injection molding according to an embodiment of the present invention. The steps of the present embodiment include: raw material mixing operation (step S21), mixing and granulating operation (step S22): heating, blending, extruding and granulating the mixed raw material through a mixer, and then melting to form a plurality of antibacterial copper nano-masterbatches; and injection molding operation (step S23), including:

[0038] plasticization step (step S231): loading a hopper of an injection machine with the antibacterial copper nano-masterbatches and a plurality of thermoplastic polyurethane colloidal particles to form a mixed material, transferring the mixed material from the hopper into a barrel, extruding the mixed material with a screw in the barrel to turn the mixed material into a molten state by frictional heating, and maintaining the melting temperature of the mixed material by using a heater;

[0039] filling step (step S232): pushing the screw to pour the molten mixed material into a mold cavity of a mold in a closed state through a discharge port of the barrel;

[0040] pressurization step (step S233): after filling the mold cavity with the molten mixed material, continuing to apply high pressure and adding the mixed material until a pouring gate is solidified;

[0041] cooling step (step S234): cooling the mixed material in the mold cavity;

[0042] ejection step (step S235): opening the mold and ejecting the cooled and formed mixed material out of the mold cavity; and

[0043] product injection step (step S236): removing a runner system and waste materials to produce an antibacterial copper nanofiber injection product.

[0044] In some embodiments, the copper nanopowder 1 is mixed with the fiber raw material 2 in a weight percentage range of 0.1%-30%.

[0045] In some embodiments, preferably, the copper nanopowder 1 is added to the fiber raw material 2 in a weight percentage range of 20%-24%.

[0046] In some embodiments, the fiber raw material 2 includes thermoplastic polyurethane (TPU), thermoplastic rubber (TPR), polyethylene (PE), polypropylene (PP), polyethylene terephthalate (PET), polyamide (PA), polybutylene terephthalate (PBT), ethylene-vinyl acetate copolymer (EVA) or nylon.

[0047] In some embodiments, during the step of raw material mixing operation, a toning colorant can be further added.