JPS61293822A - Manufacture of multi-color zip fastener - Google Patents

Abstract

PURPOSE:To enable to easily form a multi-color zip fastener, which is nearly similar with the prevailing plain colored synthetic resin zip fastener, by a method wherein process to injection-mold different color chain of fastener teeth at the predetermined intervals over the whole length of a fastener tape is repeated in regular succession. CONSTITUTION:Firstly, chains of fastener teeth with the same color are injection-molded so as to be arranged at the predetermined intervals over the whole length of each fastener tape T. Henceforward, processes, in which chains of fastener teeth E2 and E3 with the colors different from that of the chains of fastener teeth just mentioned above and from each other are injection-molded so as to fill the predetermined intervals by connecting with every chains of fastener teeth E1, which is injection-molded previously, are repeated. Thus, a multi-color fastener continuously arranged with different colored chains of fastener teeth E1-E3 on the side edge part of the fastener tape T can easily be formed. In addition, said fastener can easily be formed by a single injection cylinder.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a method for producing full-strength multicolored fasteners made of synthetic resin in various colors.

Conventional technology Conventionally, in slide fasteners whose fastener interlocking teeth are formed by full injection molding of synthetic resin, the fastener interlocking teeth are colored in a single color along the entire length, and there are also fasteners with fastener interlocking teeth of different colors. A slide fastener is known in which left and right fastener chains are combined to form a slide fastener in which the left and right fastener tooth rows have different colors.

The problem that the invention seeks to solve However, these slide fasteners.

In both cases, the longitudinal fastener tooth rows are all the same color and monotonous, so they do not blend well when attached to clothing, bags, etc. with a variety of patterns.

By the way, in order to manufacture slide fasteners with variously colored zipper tooth rows to match clothing, bags, etc. with a variety of patterns, it is generally necessary to use synthetic resin that is colored in the required color. A large number of injection cylinders for injecting the material are arranged in parallel, and the material is injected from the cylinders at appropriate intervals in the longitudinal direction to one molding die, thereby producing a complete array of fastener teeth of different colors. Injection molding may be considered, but the heating temperature, injection pressure, injection volume, etc. of multiple injection cylinders must be controlled to match the length of the fastener tooth row to be molded, the size of the fastener tooth row, etc. It is not easy to do so, and it is even more difficult to do so, especially when the lengths of different colored fastener tooth rows are different. Furthermore, if the number of colors is large, a large number of injection cylinders must be arranged in parallel, making it mechanically very difficult.

Therefore, the present invention provides a multi-colored fastener with a fastener mating tooth row of different colors easily using a single injection cylinder, without using a large number of parallel injection cylinders which are not particularly easy to control and which complicate the mechanism. The purpose of this invention is to provide a method that can produce .

Means for Solving the Problems The present invention first provides a method for overcoming the entire length of a fastener tape.
Injection molding is performed so that the fastener teeth of the same color are arranged at predetermined intervals.

By repeating the process of successively injection molding different colored fastener tooth rows over the entire length of the fastener tape so as to fill the predetermined intervals for each of the previously injection molded fastener tooth rows, To easily manufacture a multicolored fastener in which a continuous fastener tooth row of different colors is arranged on the side edge of a fastener tape.

Example Examples of the present invention will be described below.

FIG. 1 shows each process of the embodiment step by step, with different colors, namely El, E2. This figure shows the fastener tapes T, in which fastener tapes T and T fastener tapes are attached to the side edges of the fastener tapes T. And as shown in FIG. 2, E,, E2. A multicolored fastener composed of a row of fasteners in three different colors of E3 is manufactured.

First, the injection mold M used for manufacturing the multicolor fastener of the present invention will be explained. The mold M includes an upper mold M2 and a lower mold M as shown in FIG.

Each opposing surface has a fastener forming cavity 1,1゜1 in which a fastener tooth row is formed by the length of fastener teeth arranged in the same color in the longitudinal direction of the fastener fastener fastener tooth row. , .・・・
A runner forming cavity 2 is arranged in the center of the mold M over the entire length thereof. The runner-forming cavity 2 is formed by applying synthetic resin material injected from the nozzle of the injection cylinder 3 to the respective tooth-forming cavities 1, 1, 1.・・・・・・、
It communicates with the head of the cavity 1 for forming each tooth.

Furthermore, relief grooves 8 are arranged between the groups of the tooth forming cavity parts 1 on both sides with the runner forming cavity part 2 in between. This escape groove part 8 is made by injection molding in front of the fastener tape T so that there will be no problem when the upper and lower molds are closed together when the next tooth row of different colors is injection molded using the same mold. , is provided to accommodate the row of fasteners attached to the T, and the length of the relief groove 8 varies depending on the number of colors of the multicolored fastener. For example, in a mold for manufacturing three-color multicolor fasteners, the length of the relief groove 8 needs to be twice the length of one group of the cavity parts for molding the fasteners.

Also, at one end of the lower mold M, there is a positioning pin 7 that can be freely retracted.
is provided so that the position of the next tooth can be set accurately. As described above, a pair of left and right fastener tapes T and Ti held at a predetermined interval were supplied between the upper and lower molds configured as described above.

After the upper and lower molds are closed together, a synthetic resin material colored in a desired color is injected through the injection cylinder 3 and the inflow hole 4 in the upper mold M2, and is passed through the runner forming cavity 2 to form each tooth. Fastener tapes T, which are fed into the cavities 1, 1.1, .

After cooling, the upper and lower molds are opened, the fastener tape with fasteners formed thereon is sent out, the positioning pin 7 is brought into contact with the rear end of the runner 5, the next fastener forming position is set, and the mold is closed. Injection molding is repeated to form fasteners of the same color over the entire length of the fastener tape. After removing the runner 5 and spool 6 that are integrally connected to the fastening teeth using a known method, the zipper tape is set in the same mold, and the injection cylinder 5 is replaced with a synthetic resin material colored in a different color. Synthetic resin material is injected, and fastening teeth of different colors are formed on the side edges of the zipper tape where no fastening teeth are formed, and these are formed in succession to the fastening teeth. This process is repeated a number of times corresponding to the number of color types to produce multicolored fasteners.

Therefore, to explain the manufacturing method of the multi-colored fastener shown in Fig. 1, this multi-colored fastener is made by repeatedly arranging fastener rows of three different colors, El, E2, and E3, at the same length. It is injection molded, and the manufacturing process is (a) (
(B) (/-1) The mold used has three groups of tooth molding cavity parts 1, and the relief groove part 8 is a tooth molding cavity part. There are 6 pieces with a length twice as long as the length of 1 group, and 3 groups of teeth of the same color can be formed at the same time in one injection molding. (A) shows fastener tapes T and T in which a row of teeth in the color El is injection molded.Feed this to the right, bring the rear end of the runner 5 into contact with the positioning pin 7, and place the fastener at the next injection position. Tapes T and T are set and injection molded in the same way, and in this way E is applied over the entire length of the fastener tape.
Injection mold a tooth row of color l. After the runner 5 was removed, a tooth row of color E2 was injection molded around the entire circumference of the middle mold to continue with a tooth row of color E2, as shown in Fig. 1. Similarly, a tooth row of color E2 is injection molded over the entire length, and after removing the runner 5, a tooth row of color E3 is continuously formed between the tooth row of color E1 and the color of E2. Figure 1 (/→) shows the injection-molded fastener chain.Then, after removing the runner 5, the left and right fastener chains are engaged with the slider S to form E in different colors as shown in Figure 2.
l, E2. g3 A multicolored fastener consisting of three different colored fastener rows is completed. The above method is an example using a mold that injection molds three groups of fastener rows spaced at predetermined intervals at once. However, as shown in FIG. 4, it is also possible to manufacture all multicolored fasteners using a mold configured to injection mold one group of fastening teeth. In this case, it is not necessary to particularly provide the escape groove portion 8. Note that 9 is a positioning means that is brought into contact with the runner 5 similarly to the positioning bin 7 . Further, numeral 10 is a positioning means that uses injection-molded interlocking teeth for positioning, but either method allows for smooth engagement by correctly arranging interlocking teeth of different colors. In order to perform injection molding, it is important to position accurately.

In the embodiment shown in Fig. 1, an example of a multicolored fastener is shown in which there are three different colors and the length of the fastener rows of each different color is the same. It can be injection molded with various lengths, etc. Figure 5 shows the length of the tooth row using two types of colors, E4 and E5. This is an example of a multicolored zipper with the same design. Figure 7 shows an example of two different colors and different lengths of the tooth rows, and Figure 8 shows an example of three different colors and different lengths of the tooth rows. Figure 9 shows two different colors and the lengths of the tooth rows.
This is an example in which the length is twice as long as the tooth row of different colors of o.

In addition, the above is an example in which the positions of the different-colored fastener teeth are the same on the left and right zipper chains, but this can be done by shifting the left and right fastener chains and interlocking them, as shown in Figure 10. If it is made into a colored fastener, it can be used as a multi-colored fastener with a wide variety of colors. In addition, in order to change the length of the tooth row to be injection molded, first
As shown in Figure 1, the adjustment rod 11 is inserted a predetermined length into the runner forming cavity 2 provided at the center of the mold M'' to control the flow of the synthetic resin material injected from the injection cylinder 5 into the connecting teeth. By adjusting it, you can easily create a tooth row of desired length.

Furthermore, in each of the above embodiments, multicolored fasteners are manufactured using only a single injection molding machine and a single molding die, but a plurality of injection molding machines are each equipped with the same molding die. At the same time, the synthetic resin material of the desired color is charged into each injection molding machine, and the entire length of the zipper tape is injection molded while being sequentially supplied to the plurality of injection molding machines. Colored fasteners may also be produced.

Effects of the Invention The present invention involves sequentially repeating injection molding of different colored fastener tooth rows over the entire length of the fastener tape at predetermined intervals for each different color. Since we manufactured a multicolored fastener with a fastener tooth row, it is almost the same as manufacturing a normal single-colored synthetic resin slide fastener repeatedly, and the multicolored fastener can be easily manufactured. It is something that can be done. In addition, the number of different colors can be easily increased by increasing the number of repeated steps, and the length of the fastener tooth row that makes up the different colors can also be changed. It has excellent effects such as being able to manufacture multi-colored fasteners that match the various patterns of haberdashery and the like.

[Brief explanation of the drawing]

FIG. 1 is a plan view of a fastener tape showing each step of the steps of an embodiment of the present invention, FIG. 2 is a plan view of the finished tape, and FIG. 3 is a mold for carrying out the method of the present invention. Fig. 4 is a plan view of the fastener tape showing each step of the steps of the embodiment using different molds, Fig. 5 is a schematic diagram of the fastener tape in two different colors, and Fig. 6 is a diagram of the fastener tape in four colors. 7 to 9 are schematic diagrams of fastener tapes with different lengths of the fastener tooth rows,
FIG. 10 is a schematic diagram of a fastener tape in which the left and right fastener chains of a multicolor fastener are meshed by shifting their meshing positions. FIG. 11 is a perspective view of a mold equipped with an adjustment rod. 1...Function tooth forming cavity 2...Runner forming cavity 5...Injection cylinder 5...Runner 7...Positioning Pin 8...Escape groove 11...Adjustment rod

Claims (1)

[Claims] In a method for manufacturing multicolored fasteners in which fastener teeth of different colors are arranged in the longitudinal direction, injection molding is performed so that fastener teeth of the same color are arranged at predetermined intervals over the entire length of the fastener tape. , by repeating the process of sequentially injection molding a different colored fastener tooth row over the entire length of the fastener tape so as to fill the predetermined gap for each previously injection molded fastener tooth row. , a method for producing a multicolored fastener in which a continuous row of different colored fastener teeth is arranged on the side edge of a fastener tape.