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    2.
    发明专利
    未知

    公开(公告)号：DE3906810A1

    公开(公告)日：1990-09-06

    申请号：DE3906810

    申请日：1989-03-03

    Applicant: BASF AG

    Inventor： SCHUERMANN HELMUT ,  LAUX RUDI ,  LEONHARD CHRISTIAN

    IPC: B29C43/36

    Abstract: For producing moulded articles from fibre-reinforced composites, a compression-moulding tool is used, which tool comprises two tool halves (1, 2) which can be moved towards each other, of which the one tool half contains a cavity (4) corresponding to the moulded article and the other tool half contains a moulding die (3), which can be introduced into the cavity. In order to reduce the accuracy requirements for the play of the vertical flash face and in order to close the cavity completely, sealing strips (5) are provided on the moulding die. These strips are positively and/or non-positively joined to the longitudinal sides of the moulding die and to this die.

    Fibre reinforced resin mouldings prodn., esp. leaf springs - by press moulding several laminate strips so that the resin curing reaction proceeds smoothly from one surface to the opposite surface
    4.
    发明专利
    Fibre reinforced resin mouldings prodn., esp. leaf springs - by press moulding several laminate strips so that the resin curing reaction proceeds smoothly from one surface to the opposite surface 未知

    公开(公告)号：DE4106658A1

    公开(公告)日：1992-09-03

    申请号：DE4106658

    申请日：1991-03-02

    Applicant: BASF AG

    Inventor： LEONHARD CHRISTIAN ,  MEIER THOMAS ,  CRAMER EDWIN DR ,  NISSEN DIETMAR DR

    IPC: B29C35/02 ,  B29C70/46

    Abstract: Prodn. of moulded prods. (I), esp. laminated springs, from fibre reinforced, liq., heat curable synthetic resin (II), by impregnating the fibre (in the form of strand, bundles, or woven or non-woven mat) with (II), converting into a laminate sheet, opt. cutting into strips, and curing a combination of several strips by heating in a press. The novelty is that the layers of laminate strips are hardened by applying the pressure to the largest opposite surfaces of the moulding so that the curing process starts from one of these surfaces and proceeds towards the other. More specifically, one surface of the moulding is heated to 5-50 deg.C above the starting temp. (T) of the resin curing reaction and the opposite surface surface is heated to 50-30 deg.C below T. The resin in the strips differs in reactivity, basically showing a continuous change in reactivity over the cross section of the moulding. USE/ADVANTAGE - The process enables the prodn. of laminated springs, etc. with a large cross-section, without shrinkage, delamination or cracking (contrast prior-art processes in which both surfaces harden before the middle of the moulding)

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