The present disclosure provides a method for manufacturing a workpiece including a heating process capable of heating a resin workpiece uniformly.

The method for manufacturing the workpiece includes the heating process for supplying superheated steam from a plurality of nozzles to heat the resin workpiece having a planar part. In the heating process, the superheated steam is blown on the resin workpiece from the plurality of nozzles to heat the same in a state that each axis of the plurality of nozzles is arranged so as to be inclined in one direction along a plane of the planar part with respect to a normal of the planar part.

A method involves heating fiber-reinforced semi-finished products of differing wall thickness to a required temperature above the glass transition range or the matrix melting temperature of a plastic matrix of the semi-finished product to be heated. In a first step, the semi-finished product to be heated is heated by thermal conduction to below the glass transition range or the matrix melting temperature. In a further step, the remaining amount of heat for reaching the required temperature above the glass transition range or the matrix melting temperature is introduced by thermal radiation or thermal convection.

In order to provide a method for heating an object (102) that is simple to perform and makes it possible to heat an object (102) efficiently and reliably, it is proposed that the method should include the following: providing an object (102) to be heated; applying at least one energy beam (108, 109) to the object (102) to be heated, wherein at least one energy beam (108) is guided over the object (102) to be heated multiple times, along a predetermined intended heating path (114), and this heats the object (102) along the intended heating path (114); determining a temperature distribution over the intended heating path (114), for identifying one or more deviation points (120) at which an actual local temperature differs from an expected and/or calculated temperature; changing and/or supplementing the application of at least one energy beam (108, 109) in order to compensate for the temperature difference at one or more deviation points (120).

An apparatus for reheating and conditioning an elongate preform for forming a blow molded container, said apparatus comprising: a receiver including an elongate annular non-cylindrical inner surface portion, wherein the surface portion defines a cavity and is adapted to engage with an elongate outer surface of an elongate preform to transfer heat thereto by conduction from said surface portion, wherein the surface portion includes a three-dimensional relief to provide substantially non-uniform contact between the receiver and the elongate preform; and means for heating said receiver.