摘要：

A necking machine mechanism of a can making machinery comprises a plurality of propulsion heads, a base plate and a plurality of necking heads, wherein the base plate is driven by a power source to rotate; the necking heads are arranged on the base plate; the quantity of the propulsion heads is the same as that of the necking heads, and the propulsion heads can be driven by the vacuum air to advance and retreat; and the propulsion heads driven by the vacuum air push forwards to push a can body into the necking heads for necking; after necking, the propulsion heads drive the can body to retreat and leave from the necking heads. Compared with the prior art, the utility model has the beneficial effects that as the base plate is provided with the plurality of necking heads, the working efficiency is improved.

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