A method comprises in sequence the steps of: dispensing a continuous polymeric extrudate in a molten state; separating from the continuous extrudate a dose substantially having the shape of a parallelepiped, the dose having a separation surface at which the dose has been separated from the continuous extrudate, the dose further having a face adjacent to the separation surface; conveying the dose towards a mould comprising a first mould part and a second mould part; shaping the dose in the mould by moving the first mould part and the second mould part one towards the other in a moulding direction arranged transversally to said face, thereby obtaining a dispensing part of a container. The dispensing part comprises: an edge zone suitable for being joined to a container body; a neck surrounding a passage through which a product contained in the container can be dispensed; a membrane which closes the passage, the passage being intended to be opened after the shaping step, so that said product can flow out.

A method of producing an engine oil adapter assembly, the method including forming a single polymeric body through a molding process. The body including a lower surface, an upper surface, a filter housing, a first connection interface, and a lubrication flow path. The lower surface being configured to mate with a lubrication network in an engine. The upper surface being configured to mate with a cooling component. The filter housing being defined at a first end of the body, and being configured to house an oil filter. The first connection interface being defined at the first end of the body at an end of the filter housing. The first connection interface being connectable to a cap. The lubrication flow path establishing a communication channel between the lubrication network and the filter housing. The method further provides a plurality of inserts being overmolded in the single polymeric body.

A three-dimensional data generation method of a threaded fastener for three-dimensional additive manufacturing includes: a step of generating first threaded portion data by enlarging three-dimensional data of a threaded portion of a standard threaded fastener along the axial direction of the threaded portion by a factor of 1.0 to 2.5; a step of generating second threaded portion data by duplicating the first threaded portion data; a step of generating third threaded portion data by disposing the first threaded portion data and the second threaded portion data on the same axis such that one ridge in the second threaded portion data is located between two ridges in the first threaded portion data; and a step of generating fourth threaded portion data by extracting a portion with a length from a part in which the first threaded portion data and the second threaded portion data overlap in the third threaded portion data.