| 摘要 |
The present invention relates to a method for performing the clamping force relaxation in a clamping unit of an injection molding machine. During set-up of the injection molding process, one or more real pressure curves of the mold cavity pressure during the cooling phase are determined and a set-point curve is derived therefrom, which is stored in the machine control unit. In dependence upon the product properties and material properties the seal point is established on the pressure curve. Furthermore, the relaxation speed of the clamping pressure of the clamping unit is determined and it is specified, in dependence upon the seal point and relaxation speed, at which pressure on the reference curve the clamping force relaxation is started. During the cyclic operation of the injection molding machine the actual pressure during the cooling phase is determined and the pressure force increase is performed when the actual pressure has reached the set-point pressure that was specified during set-up.
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