How to reduce 750g preform’s cycle time

For 750g PET preform, its body thickness is more than 9mm. Normally, the cycle time will be 120s per shot. So, with 4-cavity mold, you can produce 2880pcs of 750g preform only per 24 hours. To use a side-entry robot with cooling tube to take out the preform from mold is a good way to reduce the cycle time. But the machine investment will be too high. So, besides the machine, we have also done further R&D on mold section and finally found a suitable copper alloy to make mold’s core part. This special copper alloy can ensure the core’s necessary hardness, but also can provide fast cooling efficiency in the mold. According to different preform thickness design and cooling water supply’s condition, the copper-alloy-mad core can reduce 10-15% cycle time on the same machine without robot. Really worthy to be done!