Head Material can be divided into: plastic, stainless steel seal top, head products are mostly male, cone shell, adjustable sections, flat lid and tightening the mouth. Wherein the convex head (sometimes referred to by the shape classification) comprising: a hemispherical head, oval head, dished head and a spherical cap-shaped head.
Head of manufacturing methods
a) Small head: the overall shape;
b) large and medium-sized head: first splicing molding - the most widely used, mainly for the requirements of the standard in terms of it;
c) large head: because of factors such as transport and open file request to split forming, after welding together.
