Heating plate for workpieces

Heating plate (12) for workpieces,

• comprising a heatable body (130) which on a first side has a contact surface (15) for the respective workpiece,
• comprising at least one heating channel (135) filled with a heating fluid for heating the heatable body (130), which heating channel (135) is formed in or on the heatable body (130) opposite the contact surface (15), and
• comprising heating means (35) for heating the heating fluid, wherein
• a channel wall (135.1) of the at least one heating channel (135) is configured to be inductively heated and the heating means (35) comprise at least one heating device (35.1) for inductively heating the respective channel wall (135.1),
• the respective heating device (35.1) being arranged outside the at least one heating channel (135) and the heating fluid in the at least one heating channel being able to be heated by a transfer of heat to be generated by means of the heating device (35.1) in the respective channel wall (135.1),
• the heatable body (130) comprising a plurality of bores (132) which are respectively configured to be continuous between two opposing front faces (131.1, 131.2) of the heatable body (130),
• the respective bores (132) respectively forming a portion of the at least one heating channel (135) and being connected to one another via connecting channels (140, 146) that are continuous for the heating fluid,
• each of the connecting channels (140, 146) connecting two of the bores (132) respectively at their ends at one of the two opposing front faces (131.1, 131.2), such that all bores (132) and all connecting channels (140, 146) respectively at their ends are connected in series to one another and accordingly respectively form different longitudinal portions of the at least one heating channel (135),
• the respective channel wall (135.1) being formed from regions of the heatable body (130) which on a side of the heatable body (130) remote from the contact surface (15) is adjacent to the respective bores (132), and
• at least one of the respective connecting channels (140) being arranged on one of the respective front faces (131.1, 131.2) of the heatable body (130) and being implemented in the form of a recess (141) formed in the heatable body (130), which opens into at least two of the respective bores (132),
• on one of the respective front faces (131.1, 131.2) a cover element (142) being arranged, which covers the recess (141) and the respective bores (132) into which the recess (141) opens.