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    METHOD OF HYDROSTATICALLY EXTRUDING COMPOUND MATERIAL AND COMPOUND BILLETS
    22.
    发明专利
    METHOD OF HYDROSTATICALLY EXTRUDING COMPOUND MATERIAL AND COMPOUND BILLETS 未知

    公开(公告)号：IN139573B

    公开(公告)日：1976-07-03

    申请号：IN24CA1974

    申请日：1974-01-04

    Applicant: ASEA AB

    Inventor： LUNDBLAD E ,  NILSSON J ,  KORSELL T ,  LARKER H

    IPC: B21C23/00 ,  B21C23/22 ,  B21F19/00

    Abstract: In the hydrostatic extrusion of compound billets, in which the billet is formed of a core of one material and a casing surrounding the core of another material, and in which a gap is left during the assembly of the billet to allow for deformation of the casing, the core is provided with a point and the casing has an inwardly directed conical flange within which the point of the core rests. At the back end, the core is provided with a sealing device for preventing the entry of fluid into the space between the core and the casing. In order to prevent the compression of the air in the space between the core and the casing, the core is provided at its front end with passages which open into the point of the core and which communicate with the space between the core and the casing, providing an air escape arrangement.

    23.
    发明专利
    未知

    公开(公告)号：SE375935B

    公开(公告)日：1975-05-05

    申请号：SE7312058

    申请日：1973-09-05

    Applicant: ASEA AB

    Inventor： LARKER H

    IPC: B21C23/21 ,  B21C23/00 ,  F16J10/04 ,  B30B11/30

    Abstract: In a press for hydrostatic extrusion which has a prestressed outer supporting member and an inner tube or liner, the end surfaces of the inner tube are inwardly inclined towards its center with an inclination of at least 1:20, and the seal holders which take up forces operating on the seals have inclined end surfaces which make contact with the inclined end surface of the inner tube. The sealing arrangement includes a first sealing ring with a cylindrical inner surface which contacts the punch and the die respectively, and an end surface making contact with the support ring, and a second sealing ring with an outer cylindrical sealing surface which makes contact with the inner tube and an inclined end surface which makes contact with the inclined end surface of the support ring.

    25.
    发明专利
    未知

    公开(公告)号：SE364659B

    公开(公告)日：1974-03-04

    申请号：SE927071

    申请日：1971-07-19

    Applicant: ASEA AB

    Inventor： LARKER H

    IPC: B23P11/02

    27.
    发明专利
    未知

    公开(公告)号：SE339927B

    公开(公告)日：1971-11-01

    申请号：SE601170

    申请日：1970-04-30

    Applicant: ASEA AB

    Inventor： NILSSON J ,  LARKER H

    IPC: B21C23/00

    Abstract: For hydrostatic extrusion, a press is provided having a yoke. One of the end pieces of the yoke carries a die receiving block having an extrusion passage therethrough. A pressure cylinder is mounted within the yoke for movement towards and from the die receiving block. Slidable in the cylinder of the high pressure cylinder is a billet holder which divides the space within the cylinder into two parts. The billet holder has a spring controlled valve which prevents passage of pressure fluid therethrough until a predetermined pressure differential exists between the chambers. A punch is provided for sliding into and out of the high pressure cylinder on the opposite side thereof from the die.

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