A method for moulding an elongate articulated bending section body for a medical device, such as an insertion endoscope, said articulated bending section body comprising a number of segments (5, 6, 7) including a proximal end segment, a distal end segment and a number of intermediate segments arranged between the proximal segment and the distal segment, where said segments (5, 6, 7) are interconnected via a number of hinge members, said method comprising providing a mould having at least two separable mould parts forming a mould cavity corresponding essentially to the external shape of said elongate articulated bending section body, thereby providing a longitudinally extending row of sub-cavities corresponding to the number of segments (5, 6, 7), said sub-cavities being in fluid connection via passages corresponding to said number of hinge members, said mould having a first number of sub-cavities where each of said first number sub-cavities has at least one external fluid external fluid inlet in fluid communication with a source of liquified plastic material and through which a liquified plastic material is injected into the mould to form the articulated bending section body, wherein said first number of sub-cavities are so distributed along the longitudinal extending row of sub-cavities that each cavity in said number of sub-cavities is separated from another cavity in said number of sub-cavities by an odd number of sub-cavities without an external fluid external fluid inlet, wherein the sub-cavities are generally symmetrical about a longitudinal centre plane, and wherein, as seen along the longitudinal direction, said external fluid inlets are arranged with off-sets in alternating directions from said longitudinal centre plane, injecting said liquified plastic material into said first number of sub-cavities via the external fluid inlets, and into the said odd number of sub-cavities via said first number of sub-cavities only, allowing the liquified plastic material to set to form said elongate articulated bending section body, and removing the elongate articulated bending section body from the mould. providing a mould having at least two separable mould parts forming a mould cavity corresponding essentially to the external shape of said elongate articulated bending section body, thereby providing a longitudinally extending row of sub-cavities corresponding to the number of segments (5, 6, 7), said sub-cavities being in fluid connection via passages corresponding to said number of hinge members, said mould having a first number of sub-cavities where each of said first number sub-cavities has at least one external fluid external fluid inlet in fluid communication with a source of liquified plastic material and through which a liquified plastic material is injected into the mould to form the articulated bending section body, wherein said first number of sub-cavities are so distributed along the longitudinal extending row of sub-cavities that each cavity in said number of sub-cavities is separated from another cavity in said number of sub-cavities by an odd number of sub-cavities without an external fluid external fluid inlet, wherein the sub-cavities are generally symmetrical about a longitudinal centre plane, and wherein, as seen along the longitudinal direction, said external fluid inlets are arranged with off-sets in alternating directions from said longitudinal centre plane, injecting said liquified plastic material into said first number of sub-cavities via the external fluid inlets, and into the said odd number of sub-cavities via said first number of sub-cavities only, allowing the liquified plastic material to set to form said elongate articulated bending section body, and removing the elongate articulated bending section body from the mould.