Machine shut-off nozzle, type BHP Technical description The pneumatically or hydraulically actuated machine bolt shut-off nozzles type BHP are used in processing of thermoplastics. Nozzle highlights included: Cycle time reduction, shut-off in the nozzle of the melt-stream while withdrawing or dosing. With the BHP nozzle Herzog has designed a system which allows a single through-going melt flow channel. Therefore a much bigger flow channel is possible and that is responsible for a reduced pressure drop. With this single channel principle the so called “ Memory effect”can be avoided. With the single...

Machine shut-off nozzle, type BHP Integrated Actuator Specially manufactured two-way piston cylinders with temperature resistant seals (up to 180°C) are applied for the pneumatic and hydraulic actuators. The actuator together with the nozzle assembly froms a compact unit. The cylinders are operated from input data on the machine control unit. Advantages on an integrated actuator: • No installation errors • Adjustments such as; stroke, force, etc. on the control unit are eliminated • No alignment between nozzle and cylinder is required Control cylinder construction (acc. to usual energy sources):...

Machine shut-off nozzle, type BHP Tip types Tip dimensions K Standard dimensions (mm) Standard dimensions (mm) BHP0 + BHP1 BHP2 thread M30 x 2 M45 x 3 24 28 BHP0 Ø6 / BHP1 Ø10 Ø18 30 50 Thread length Orifice K-dimension in mm (other dimensions on request) K (Optional) Option: In between lengths are custom manufactured Note: Extensions require an adjustable heating system The star represents an exposed area For restricted spaces there exist different heating possibilites, see Alternative tip heating systems on page 6. (See Optional Extras, Heating Systems) Heater band Optional variant: without...

Machine shut-off nozzle, type BHP Optional Extras Filter → preventive strategy Keeping free feed openings in the hot runner or filtering of the polymer mass in reclaimed material processing requires the use of a filter. We offer the gap filter. (See document Open machine nozzles, type F) Mixer → improved quality on injection molded parts A homoge nized melt (in colour and temperature) reduces the reject rate and produces a considerable improvement in the quality of the injection-molded parts. The installation of the mixer takes place either before or after the nozzle. We favour the X-Mixer technology....

Machine shut-off nozzle, type BHP Alternative tip heating systems→ Note: requires adjustable heating • Spa ce s avi ng e xter nal hea ting sy ste m A standard heater band requires space in the nozzle immersion area (machine plate mold). Possibility for restricted spaces: Heater band with flat cap connection and wedge clamping or cylindrical heat cartridges. (See document Optional Extras, He ating systems) • Integrated tip heating system Tip mounted haterbands have exposed areas. When injecting out the problem of over injecting can arise. This requires time consuming cleaning which can result...

Machine shut-off nozzle, type BHP Data sheet - machine shut-off nozzle, type BHP, pneumatically / hydraulically controlled Operating data BHP0 BHP1 BHP2 500 3500 5000 Up to 50 50 - 120 120 - 200 flow channel cm 10 30 360 max. contact force (kN) 70 120 180 smallest nozzle orifice (mm) M at max. injection rate Ø4 Ø7 Ø10 400 bar 400 bar 400 bar max. injection rate cm3 / s based on Polystyrol (PS) approx. screw diameter (mm) 3 max. back pressure (closed nozzle) For higher back pressure (melt precompression) or closing against solid melt pressure (physical foaming), please contact us for more information....

Machine shut-off nozzle, type BHP Dimension Sheet for enquiry or order Machine shut-off nozzle type BHP, pneu. / hydr. operated Company: Contact person: Street: Tel.: City / Zip: Fax: Land: E-Mail: Standard dimensions, see Datashee t. Measurements in mm. Temperature sensor bore (thread ø, thread pitch) Thread length (incl. centering) Temperature sensor bore (ø x depth) Connection thread (thread ø, thread pitch) Incl. Heater band Tip length (check standard dimensions) Centering length Orifice Centering ø Tip contour (radius or angle) Immersion depth (screw tip / angle) Inlet ø Nozzle size Actuation...