Method For Blocking An Optical Lens Component

A method for blocking an optical lens component on a holding unit comprising a bottom part to be inserted and fixed in a lens machining tool and an upper part comprising an upper assembling surface and external side parts, said method comprising the steps of:

• providing the optical lens component with a layer consisting of a one-side adhesive tape arranged on a bottom surface of said optical lens component such that the adhesive tape side covers at least partially said bottom surface;
• providing a thermoplastic material arranged on the upper assembling surface, wherein the thermoplastic material is heated to a temperature at which at least a part of the thermoplastic material flows under moderate pressure;
• placing the optical lens component with the layer on the thermoplastic material when the thermoplastic material is soften or melted;
• applying a first pushing force on the optical lens component, such that the soften or melted thermoplastic material spreads between said layer and the upper assembling surface and covers at least partially said external side parts, wherein when the thermoplastic material is hardened, said spread thermoplastic material forms a flange which is mechanically fastened to the holding unit and which is also adhesively fastened to said layer.