An injection mold comprising - an injector mold plate having a first injector mold plate face including first mold cavities halves (8a', 8b' 8c') of one or more mold cavities (8a, 8b, 8c, 8d) and an opposite second injector mold plate face to be mounted to an injection molding tool, - an ejector mold plate having a first ejector mold plate face including second mold cavities halves (8a",8b",8c",8d") of one or more mold cavities (8a,8b,8c,8d) and an opposite second ejector mold plate face to be mounted to an injection molding tool, - the first injector mold plate face faces towards the first ejector mold plate face to delimit one or more mold cavities (8a,8b,8c,8d) when the injector mold plate and the ejector mold plate are in closed contact during injection of a plastic material, and - at least one tempering medium channel (11;14) that connects at least a tempering medium inlet (23;25) of the injection mold to a tempering medium outlet (24;26) of the injection mold, - the at least one tempering medium channel (11;14) defines a flow path, that runs above one or more of the one or more mold cavities (8a, 8b, 8c, 8d) by traversing an area of the second injector mold plate face and of the second ejector mold plate face, the at least one tempering medium channel (11;14) defines a free opening (30;33) in said respective second mold plate face (5;7), characterised in that each of the injector plate and the ejector plate has one or several tempering channels, which each is a single continuous chicane of tight turns in opposite directions defined by channel walls and has a lengthwise opening along its entire length, which opening becomes closed when the injection mold is mounted to an injection molding tool. - an injector mold plate having a first injector mold plate face including first mold cavities halves (8a', 8b' 8c') of one or more mold cavities (8a, 8b, 8c, 8d) and an opposite second injector mold plate face to be mounted to an injection molding tool, - an ejector mold plate having a first ejector mold plate face including second mold cavities halves (8a",8b",8c",8d") of one or more mold cavities (8a,8b,8c,8d) and an opposite second ejector mold plate face to be mounted to an injection molding tool, - the first injector mold plate face faces towards the first ejector mold plate face to delimit one or more mold cavities (8a,8b,8c,8d) when the injector mold plate and the ejector mold plate are in closed contact during injection of a plastic material, and - at least one tempering medium channel (11;14) that connects at least a tempering medium inlet (23;25) of the injection mold to a tempering medium outlet (24;26) of the injection mold, - the at least one tempering medium channel (11;14) defines a flow path, that runs above one or more of the one or more mold cavities (8a, 8b, 8c, 8d) by traversing an area of the second injector mold plate face and of the second ejector mold plate face, the at least one tempering medium channel (11;14) defines a free opening (30;33) in said respective second mold plate face (5;7), characterised in that each of the injector plate and the ejector plate has one or several tempering channels, which each is a single continuous chicane of tight turns in opposite directions defined by channel walls and has a lengthwise opening along its entire length, which opening becomes closed when the injection mold is mounted to an injection molding tool.