Plastic clothespins, cloth clip, cloth peg
Now, many clothes-pegs, or called clothespins, clothes clips are manufactured very cheaply by creating two interlocking plastic, in between which is often wedged a small spring. In order to increase the added-value of plastic clothes pegs, some maker developed colorful and fashionable two-color clothespins, which is combined with PP & TPE in one part.
The reasons for making clothes clips with PP + TPE are as below:
1. Non-slip: The TPE part could clip clothes well without slip. Meanwhile, it is not easy to have pressing marks or scratches on clothes after clipping.
2. Colorful: The two-component clothespegs could be made with two different colors and different designs which let plastic clothespins look more valuable.
3. Anti-rust: The plastic clothes clips won’t make rust like a steel one.
The two-color clothes pegs are made by two different injections, one is made by one step of rotary-table molding injection, and one is made by two-step over-molding injection.
Rotary-table molding is to make the double color rotary molds, then make on two-color rotary table injection molding machine to get finished two-component clothe-pegs at once. For this procedure, the cost of both machine and mold is higher, but more efficient and low defectives.
Two-step over-molding injection means that the first injection of PP parts will be made by a single color horizontal injection molding machine. Secondly, operators will insert the PP parts on cavities of TPE molds on the vertical injection molding machine, then make the TPE parts upon PP parts. This procedure looks lower cost, but it is necessary to have double space for loading injection machines, double labor cost, double-cycle time on making one set of two-component clothespins. Meanwhile, the quality of finished two-color clips is not easy to control, will have more defectives.
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