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    • 1. 发明申请
    • PILOT CONTROLLED SERVO-VALVE
    • 先导式伺服阀
    • WO1996015373A1
    • 1996-05-23
    • PCT/EP1995004454
    • 1995-11-13
    • HYDROLUX S.A.R.L.BOURKEL, ArsèneLANFERMANN, BerndTRATBERGER, KarlPOST, Karl-Heinz
    • HYDROLUX S.A.R.L.
    • F15B13/042
    • F15B13/0402Y10T137/86606Y10T137/86614
    • A pilot controlled servo-valve has four main flow connections (20, 22, 24, 26), an axially sliding main control piston (18) with four control edges (28', 30', 32', 34') and a front restoring spring (78) that defines a spring-centred middle position of the main control piston (18). A control sleeve (12) has ring-shaped openings (20', 22', 24') for the first, second and third main flow connections (20, 22, 24) and a front opening (26') for the fourth main flow connection (26). A first front face of the main control piston (18) is axially opposed to said opening (26'). A pressure compensating surface (60) is formed by the second front face of the main control piston (18)in a spring chamber (52). The main control piston (18) applies the pressure in the fourth main flow connection on said pressure compensating surface (60) through a pressure relief channel (44). A transverse bore (46) connects said pressure relief channel to an auxiliary connection chamber (36) connected to the third main flow connection (24) by the fourth control edge (34'). This valve may be space-savingly integrated in a hydraulic block and has a clearly defined middle position, as well as a remarkable dynamic performance.
    • 甲先导式伺服阀具有四个Haupstromanschlüssen(20,22,24,26),可轴向移动的主控制活塞(18)具有四个控制边缘(28“ 30' ,32”,34' )和前复位弹簧(78)具有弹簧为中心的中心位置 主控制活塞(18)被定义。 控制套筒(12)具有环形的入口(20”,22' ,24‘),用于在第一,第二和第三主流动部分(20,22,24)和一个前部开口(26’),用于第四主流部分(26), 该开口(26“)的主控制活塞(18)轴向相对的第一活塞端表面。 均压面(60)由在一个弹簧室(52)的主控制活塞(18)的第二活塞端面上形成,并且经由压力释放通道(44)通过装载有在第四主电源中的压力,主控制活塞(18)连接。 的横向孔(46)与经由第四控制边缘(34“)与所述第三主流动部分(24)连接的辅助端口腔室(36)连接该压力释放通道。 该阀可以被紧凑地集成到一个液压块,并具有明确定义的中心位置,和优异的动态行为。
    • 2. 发明申请
    • CLOSING UNIT FOR INJECTION MOULDING MACHINE
    • 封山育林的注塑成型机
    • WO1996041711A1
    • 1996-12-27
    • PCT/EP1996002507
    • 1996-06-10
    • PAUL WURTH S.A.MAILLIET, PierreLANFERMANN, Bernd
    • PAUL WURTH S.A.
    • B29C45/67
    • B29C45/6728B29C2045/6735
    • A closing unit for an injection moulding machine has a movable closing die (20) and a fixed matching die (14), as well as several hydraulic cylinders (26) mounted on the fixed matching die (14) to generate the closing force. The closing die (20) has a drawbar (22) for each hydraulic cylinder (26). The piston (28) of each hydraulic cylinder (26) is mechanically linked to a rotary locking bushing (34). The drawbars (22) extend through hydraulic cylinders (26) and locking bushings (34). A servo-drive (70) allows the locking bushings (34) to swivel up to a first and second angular position. First locking means (38) located along a section of the drawbars (22) co-operate with second locking means (36) in the locking bushings (34) so that in the first angular position the drawbars (22) may be axially pushed through the hydraulic cylinders (26) and the locking bushings (34), and in the second angular position the closing force may be transmitted from the hydraulic cylinders (26) to the closing die (20).
    • 注射成型的夹持单元包括在固定承压板(14),用于产生闭合力的可移动的封闭板(20)和一个固定的对面板(14),和多个液压缸的力(26)的。 封闭板(20)具有每动力缸(26)拉杆(22)。 每个动力缸(26)的活塞(28)的每个机械地耦合到可旋转的锁定衬套(34​​)。 动力缸(26)和由所述拉杆(22)沿轴向越过锁定衬套(34​​)。 的致动器(70)使旋转的第一和第二角位置时,锁定衬套(34​​)。 沿着在所述锁定衬套的拉杆(22)和第二锁定装置(36)(34)在这种情况下一起这样作用的杆部的第一锁定装置(38),其在轴向通过拉杆(22)通过液压压力缸的推压的所述第一角位置(26 )和所述锁定衬套(34​​)是可能的,和(在第二角度位置,所述闭合力(气缸26的力)上的封闭板20)是转让。