Mould Technology

Turning heads with all-electric stack-turning technology

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All-electric moulds are especially suitable in the food and the pharmaceutical industry, and also in medical engineering, the company explained, because they are much cleaner owing to the lack of hydraulic oil. Also, production without hydraulic drives is economically much more efficient, Foboha added.

A 4 x 8 + 8-fold mould for the production of a cap-sealing system for beverage bottles or bottles for food additives is to be on display at Fakuma, the company said, noting that the way this cap is used is also a novelty. The closure features a chamber for liquid additives in powder form. Photo-sensitive liquids can be stored and protected in this dark chamber until the date of consumption. Once the cap is opened for the first time, the separately stored liquid enters the bottle. Separating the flavouring substances before use not only improves the aroma, but also prolongs minimum shelf life, the company said.

The cap consists of two individual parts, manufactured using a cube mould, and a lid for subsequently resealing the powder chamber. Eight upper and eight lower parts each are injected in both the mould-parting lines of the cube mould. The slide bars necessary for demoulding the outer thread and the non-tamper seal are arranged on the nozzle side.

Once the injection process in both injection units is completed, the central block is turned by 90°. As soon as the next injection phase begins, the lower parts are connected to the upper parts on both exposed sides. This is done by a removal unit developed in-house, with the two handling units removing the eight upper parts, running these sideways to the lower part and screw-connecting them. The assembled parts are demoulded by means of a servo-driven novel ejector system. Overall, the mould system can produce 16 mounted sealing caps in each cycle.