Spritzsystem EFE Version dd

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					Injection system EFE              Injection system
High performance injection unit
for reduced cure times            EFE

                                    Injection moulding solutions
                                    for individual requirements
                                    LWB offers a wide range of injection units for different applications and requirements. LWB is con-
                                    tinuously improving the injection systems based on our kow-how and experience in rubber tech-
                                    nology. This, together with a large custom base leads to a greater efficiency, precision and con-
                                    trollability of the injection systems. These developments have shown that different injection
                                    systems, depending on the respective application, have a great influence on the injecting process
                                    as well as the quality of the finished product.

                                    The EFE-injection system – a FIFO-injection unit (FIRST IN – FIRST
                                    OUT) combined with the ALL OUT technology allows considerable
                                    cure time reductions.
                                        The EFE-injection system represents the state-of-the art injection technology
                                    and ideally combines the positive behaviour of the FIFO-injection system with the
                                    ALL-OUT technology. The combination of the 2 injection techniques make the EFE-
                                    injection sinjection system the latest development and can be refered to as the „First
                                    In - First Out – All Out Technology“, allowing cure time reduction of up to 50%, using
                                    existing moulds and unchanged materials. This is achieved by a multi-step control of                                   Due to the material temperature
                                    the dissipative energy brought into the material by means of the Rapid Cure function                                   increase during injection the materials is
                                    in between the EF-injection unit and the E-injection plunger.                                                          injected into the centre of the cavity at
                                                                                                                                                           a higher temperature. This results into
                                    The material is injected by means of the EF-injection system (FIFO) through the                                        a considerable cure time reduction, as
                                    E-injection cylinder/nozzle (ALL OUT) into the mould. At the end of the injection                                      the vulcanizing begins at a higher start
                                    process the vertically arranged E-injection plunger empties out the injection                                          temperature. As the material temperature
                                                                                                                                                           increase is achieved early in the process
                                    cylinder and nozzle completely. Due to the complete injection of the material from
                                                                                                                                                           consequently also the material viscosity
                                    the cylinder/nozzle, no material remains in the system thus a premature cure of                                        is lowered. This increases the flow
                                    material is impossible.                                                                                                properties of the material and results in a
                                    A temperature increase of the material during the injection phase is achieved by                                       reduced injection pressure and clamping
                                    means of the Rapid Cure function, controlled by the machine controller. This value,                                    pressure requirement.
                                    for a repeatable material temperature increase, is recorded together with the other
                                    moulding parameters. Depending on the material used, the product geometry and                                          The EFE-injection system opens up new
                                    the moulding process a most economical setting can be chosen.                                                          economical possibilities in moulding
                                                                                                                                                           rubber components compared to
                                                                                                                                                           existing moulding systems. The EFE-
                                    The special key features of the EF-E injection system:                                                                 injection technique allows an increased
                                    • complete emptying of the injection chamber and nozzle                                                                output using an existing machine/mould
                                    • Possibility to work with common material temperatures or with increased                                              size - production orders are completed in
                                      process temperatures                                                                                                 a considerably reduced production time.
                                    • reduced material viscosity during the injection process                                                              Or, use smaller less expensive machines
Technical data subject to change!

                                                                                                                                                           with a reduced energy requirement.
                                    • availability for all LWB-machine models
                                                                                                                                                           Besides a reduced investment with a
                                    • Possibility to retrofit to existing presses (also different brands)                                                    reduced hourly machine cost, as well
                                                                                                                                                           as reduced space requirement and
                                                                                                                                                           less energy consumption a reduced
                                                                                                                                                           manufacturing cost is achieved. At the
                                                                                                                                                           same time smaller, less expensive moulds
                                                                                                                                                           with less cavities are handled. These
                                                                                                                                                           moulds with less cavities are easier to
© 2007 LWB Steinl

                                                                                                                                                           handle, however, still provide the same
                                                                                                                                                                      output compared to standard
                                                                                                                       EFE-system – functional principle                          moulding systems.

                                    Technical data EFE-injection system
                                                                      EFE    EFE    EFE     EFE    EFE   EFE     EFE        EFE       EFE       EFE                   All-Out-Injection System
                                     Type                             115    200    630    1000   2000   3000   4000       5000      6300      8500                                    (Type E)
                                     Injection volume cm³             115    200    630    1000   2000   3000   4000       5000      6300      8500
                                     Injection pressure bar
                                     (injection head)
                                                                      1950   2000   2200   2200   2200   2200   2200       2200      2200      1800

                                     Injection pressure bar
                                                                      1800   1800   1800   1800   1800   1800   1800       1800      1800      1800
                                     (E - ALL OUT injection module)                                                                                                      FIFO-Injection System
                                     Screw diameter mm                 35     42     32     32     40     50     50         50        63         80                                   (Type EF)

                                    w w w. l w b - s t e i n l . c o m

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