Machine for liquid or semi-liquid food products

A method for making a machine for producing liquid or semi-liquid products comprising the following steps:

• preparing a first container having an inside surface and an outside surface, adapted to contain a basic mixture and equipped with a stirrer disposed inside the first container;
• preparing a thermodynamic system comprising a circuit for circulating a heat exchanger fluid and a first heat exchanger associated, in use, with walls of the first container, characterized in that the step of preparing a first heat exchanger comprises the following steps:
• preparing at least one element,
• forming in the at least one element a cavity, extending uninterruptedly to define a channel for circulating the heat exchanger fluid between an inlet and an outlet and further comprising the step of undetachably associating the at least one element with at least one portion of the outside surface of the first container in such a way that the cavity faces towards the outside surface of the first container, to define, together with the outside surface, the channel for circulating the fluid.