Rope fastener injecting method

Abstract

An injection molding method for rope ring includes such steps as arranging more than 2 locating posts in the molding cavity of a mould, winding a rope around said locating posts, stretching it, injection molding, and removing exposed rope end.

Description

technical field [0001] The invention relates to a rope buckle injection molding method. Background technique [0002] As shown in Figure 1, it is a common rope buckle structure, which includes two parts: a rope sleeve 1 and a buckle head 2. The rope sleeve 1 can be used to fasten the buttons of clothes, which is equivalent to a buttonhole. The rope buckle is also used for various bags Commonly used fastener parts, so it has a wide range of uses. [0003] In the prior art, there are usually two molding methods of the rope buckle: one is PVC cold glue, dripping glue; the other is high temperature and high pressure plastic injection molding. [0004] The process of PVC cold glue and glue dropping method is as follows: first cut the rope according to the length, then put the broken ends of the rope into the cavity of the mold, then put the glue into the mold, and then put it into the oven to bake to make it solidify , so that the broken end of the rope cover 1 can be wrapped i...

AI Technical Summary

Problems solved by technology

However, the disadvantage of the rubber stamp method is that at least one side is a matte rough surface, which affects the appearance of the product and reduces the selling point

However, the injection molding process will be accompanied by high temperature and high pressure, and because the broken end of the rope is not fixed, the high pressure can easily disrupt the broken end, causing it to shift up and down, and even exposed outside the buckle to become a waste product. In order to reduce the waste rate, It is necessary to increase the size of the buckle, so that the volume of the entire final product is too large

In addition, even if a large-sized buckle is made, due to the existence of high pressure, it is easy to cause the rope to break and shift, which will affect the appearance quality of the product. If the deviation is too large, the side wall of the buckle will be too thin, which will also affect the product. the quality of

And like the glue dropping method, there will also be defects that the pore size cannot be controlled, which will affect the product quality.

[0006] There is also a method of making a rope buckle, which is to make the buckle head into two halves, and then glue the two halves of the buckle head together by hot melting, and at the same time heat-fix the rope head part of the noose on the buckle In this way, the rope head is not completely covered with the buckle head, and the rope head is easy to come out of the hole of the buckle head, so the quality is relatively poor and the processing is complicated

[0007] The above-mentioned methods all have a common defect, that is, the rope is in a loose state during injection molding, so the inner diameter of the buckle is the diameter of the rope, and the rope is stretched during use, and its diameter becomes smaller. , the rope can easily come out of the buckle

Images