| 摘要 |
Soles (e.g. laminar type) are moulded onto shoe uppers which are held on lasts. The sole is a low viscosity material, partic. polyurethane, thermoplastic or rubber; the area concerned and/or adhesive is roughened. The materials used are injected opt. successively into a mould with side parts on the last and with a moving punch tool; at this stage the mould cavity is larger than the sole; after the injection that vol. is reduced by moving the punch to the sole layer to form it, and the moulded sole is finally deflashed along the edge. Before the moulding process the geometry of the last and mould in the part between the sealing edges is defined by establishing the x, y and z coordinates and tangential angles, and also pref. line to a defined coordinates zero point (pref. in a measuring device outside the turntable). The data are stored. When the last has the upper and side parts drawn over it after injection moulding into a series of moulds on a turntable, same zero point is determd. again and the deviation is ascertained; the coordinates and tangential angles are converted and dressing etc. tools are drawn along the required line (or parallel) to roughen, apply adhesive to and/or trim accordingly. |
