US-12617136-B2 - Method of producing a plastic member of a hair ornament

US12617136B2US 12617136 B2US12617136 B2US 12617136B2US-12617136-B2

Abstract

A method of producing a plastic member of a hair ornament comprises providing first and second plastic materials which are different in material and color. The first plastic material is transparent or translucent. The second plastic material is in the form of a plurality of particles. The first plastic material, the second plastic material, and a bridging agent are mixed and filled into an injection molding machine. The first plastic material melts and envelops the particle-shaped second plastic material. The enveloped particle-shaped second plastic material is outputted to a mold for forming the plastic member of the hair ornament. A hardened product of the plastic member is removed from the mold. The first plastic material forms an outer surface layer of the plastic member. The shape and the color of the second plastic material are directly viewable from an outer side of the product of the plastic member.

Inventors

Kuo-Yang Hsu

Assignees

Kuo-Yang Hsu

Dates

Publication Date: 20260505
Application Date: 20240729
Priority Date: 20230913

Claims (5)

1 . A method of producing a plastic member of a hair ornament, with the method comprising: providing a first plastic material which is transparent or translucent; providing a second plastic material which is in a form of a plurality of particles, is made of a material different from the first plastic material, and has a color different from a color of the first plastic material; mixing the first plastic material, the second plastic material, and a bridging agent to form a mixture, and filling the mixture into an injection molding machine; heating and melting the first plastic material to envelop the particle-shaped second plastic material, and outputting the enveloped particle-shaped second plastic material to a mold for forming the plastic member of the hair ornament; and removing a hardened product of the plastic member from the mold, wherein the first plastic material forms an outer surface layer of the product of the plastic member, wherein a shape and the color of the second plastic material are directly viewable from an outer side of the product of the plastic member, wherein the second plastic material includes a hardening agent to avoid deformation of the particle-shaped second plastic material under a forming pressure, wherein the second plastic material does not melt in an environment in which the first plastic material melts at its melting point, and wherein the bridging agent provides complete enveloping and connection between the first plastic material and the second plastic material, and wherein providing the second plastic material includes: filling the second plastic material in a molten state into a block mold for forming a block, placing a liquid colorant and the hardening agent into the block mold, placing the block mold in hot water of about 98-100° C. to gradually mix and harden the colorant, the hardening agent, and the second plastic material, placing the block mold in an oven to remove residual water in the second plastic material removing the block-shaped second plastic material from the block mold, and chopping the block shaped second plastic material into the plurality of particles.
2 . The method as claimed in claim 1 , wherein a colorant and the hardening agent are added into the second plastic material while enhancing bonding stability between the colorant and the second plastic material.
3 . The method as claimed in claim 1 , wherein the block mold is placed in the hot water for 7-9 hours.
4 . The method as claimed in claim 1 , wherein the block mold is baked for 4-5 hours.
5 . The method as claimed in claim 1 , wherein the first plastic material is polystyrene, and wherein the second plastic material is polycarbonate.

Description

BACKGROUND OF THE INVENTION The present invention relates to a method of producing a plastic member of a hair ornament and, more particularly, to a method for forming a hair ornament with improved color quality. Hair ornaments, such as hair clips, hair bands, hair ties, etc. are worn on the hair and often have bright colors to enhance the decoration quality. In current approaches for enhancing the sense of beauty in color, a colored layer is applied on a surface of a hair ornament by coating or spray painting, but the colored layer tends to wear and, thus, fall from the surface of the hair ornament. To improve the above situation, plastic materials of two different colors are respectively filled into an injection molding machine for formation. Specifically, a plastic material of a color melts first and is outputted by the injection molding machine to a mold for hardening/formation of a semi-product. Another plastic material of another color is filled into the injection molding machine and is outputted in a molten state into another mold to envelop a portion of the outer surface of the hardened semi-product. Thus, the hair ornament after formation has two distinct colors in appearance. However, the above formation approach is monotonous in color. Currently, two or more plastic materials of different colors may be mixed and filled into an injection molding machine at the same time. The different plastic materials are mixed after melting and are then outputted to a mold for formation. Thus, the hair ornament product may provide different patterns and colors by mixed colors or gradient layers, thereby providing diversity in the sense of quality. However, this formation approach fails to provide distinct colors, and two different materials cannot be polymerized completely, such that the crystallization is incomplete, and the surface layer of the product is apt to peel. BRIEF SUMMARY OF THE INVENTION An objective of the present invention is to provide a method of producing a hair ornament with distinct colors and enhanced diversity. A method of producing a plastic member of a hair ornament according to the present invention comprises: providing a first plastic material which is transparent or translucent;providing a second plastic material which is in a form of a plurality of particles, is made of a material different from the first plastic material, and has a color different from a color of the first plastic material;mixing the first plastic material, the second plastic material, and a bridging agent to form a mixture, and filling the mixture into an injection molding machine;heating and melting the first plastic material to envelop the particle-shaped second plastic material, and outputting the enveloped particle-shaped second plastic material to a mold for forming the plastic member of the hair ornament; andremoving a hardened product of the plastic member from the mold, wherein the first plastic material forms an outer surface layer of the product of the plastic member, wherein a shape and the color of the second plastic material are directly viewable from an outer side of the product of the plastic member. In an example, a colorant and the hardening agent are added into the second plastic material while enhancing bonding stability between the colorant and the second plastic material. In an example, providing the second plastic material includes filling the second plastic material in a molten state into a block mold for forming a block; placing a liquid colorant and the hardening agent into the block mold; placing the block mold in hot water of about 98-100° C. to gradually mix and harden the colorant, the hardening agent, and the second plastic material; placing the block mold in an oven to remove residual water in the second plastic material; removing the block-shaped second plastic material from the block mold; and chopping the block-shaped second plastic material into the plurality of particles. The second plastic material includes a hardening agent to avoid deformation of the particle-shaped second plastic material under the forming pressure. The second plastic material does not melt in an environment in which the first plastic material melts at its melting point. The bridging agent provides complete enveloping and connection between the first plastic material and the second plastic material, reliably preventing peeling of the color of the second plastic material. The first plastic material is transparent and is not polymerized with the second plastic material to avoid mixing of colors. Thus, the shape and color of the second plastic material can be clearly seen through the transparent first plastic material. The color and the internal three-dimensional visual effect of the plastic member can be varied according to different viewing angles. Furthermore, the first plastic material is polymerized completely to avoid peeling from the surface, thereby enhancing the quality and reliably of the product of the