1. Field of the Invention
The present invention is related to a bead string, and more particularly, to a thread element covered with multiple beads with each molded by injecting plastic material into different mold cavities to deliver clearly defined color gradations and versatile changes in color and style of beads firmly fastened to the thread element.
2. Description of the Prior Art
Referring to
The bead string (9) is applied to make a door curtain, window curtain, wrist chain, necklace or similar ornament. As illustrated in
However, the manufacturing process of the bead string (9) of the prior art consumes lengthy time since it takes to pass the thread element (91) through the bead (92) via the through hole (923) and tie a fast knot all by manual; any human error in the intervals among those beads (92) could affect symmetry and aesthetics of the bead string (9). If any fast knot (93) fails to tightly rest on the bead (92), the bead (92) could slide up or down to fail meeting customer requirements. The presence of the fast knot (93) appears to spoil integrity and aesthetics of the bead string (9).
The primary purpose of the present invention is to provide a bead string comprised of a thread element covered up with multiple layers of plastic material. Versatile changes in appearance and color are achieved to upgrade appreciation interest and artistic value of the bead string by injecting multiple types of plastic material in different colors or transparencies depending on each of multiple different cavities.
To achieve the purpose, a bead string of the present invention includes a thread element and multiple beads. Wherein, those beads are spaced at intervals and firmly attached to the thread element; each bead contains one or a plurality of a first layer; different types of plastic material are respectively injected into a first cavity and a second cavity to mold the inner layer and the first outer layer; one or a plurality of thread element passes through the first cavity; the inner layer tightly covers up the thread element; the second cavity accommodates one or a plurality of thread element and the inner layer; and the first outer layer tightly covers up the inner layer.
Referring to
The inner layer (31) is molded by injecting a plastic material into a first cavity where the thread element (2) passes through (not illustrated); and the molded inner layer (31) when cooled down to tightly cover up the thread element (2); in the preferred embodiment, the inner layer (31) is comprised of a bulb (311) and two pillars (312) respectively extending from an upper end and a lower end of the bulb (311); and the bead (3) is prevented from easily moving or falling off by tight combination between the inner layer (31) and the thread element (2).
The first outer layer (32) is molded by injecting a plastic material that is different from the plastic material used in the mold injection of the inner layer (31) into a second cavity (not illustrated); the second cavity accommodates one or a plurality of thread element (2) and the inner layer (31); the first outer layer tightly covers up the inner layer (31); and in the preferred embodiment, the first outer layer (32) indicates a spherical form that tightly covers up the entire bulb and a certain portion of those pillars (312).
Accordingly, those multiple beads (3) attached to the thread element (2) are arranged at an equal interval, irregular changes, and allowing indefinitely repeated manufacturing through different designs of an injection mold without being affected by manual process thus to assure of consistent finished products and minimize occurrence of defective product; furthermore, it is not necessary to tie a fast knot in fixing each bead (3) to the thread element thus to significantly upgrade applications and artistic nature of the bead string (1).
As illustrated in
The first outer layer (32) of the bead may be further covered up one or a plurality layer of plastic material (not illustrated). Alternatively, the bead (3) may be placed in a larger mold to be injected with a plastic material to provide more layers of different types of plastic material for the first outer layer (32) to add changes to the bead either in color, shape or size.
Now referring to
It is to be noted that the preferred embodiments disclosed in the specification and the accompanying drawings are not limiting the present invention; and that any construction, installation, or characteristics that is same or similar to that of the present invention should fall within the scope of the purposes and claims of the present invention.