User manual HUSKY HRDC-DESIGN-GUIDELINES-060814

[. . . ] For most inserts, a flow rate of about 6. 8 - 8. 3 liters (1. 8 - 2. 2 gallons) per minute is sufficient. 3) The gate insert material affects heat dissipation and longevity. Insert materials such as H13 (material of choice) and 420 SS are 7x less heat conductive than BeCu Alloys. The trade-off with conductivity is hardness and gate life. [. . . ] For thin wall parts and engineering resins the pressure should be between 100-120 psi. A four way solenoid valve is required to activate valve stems. Quick exhaust valves should be installed on both air lines to increase the speed at which the stems open and close. Quick air disconnects are not recommended since these can cause flow restrictions. Use a Husky Air Kit for optimal performance. Exhaust A Quick Exhaust Valve Solenoid Solenoid (Machine indicates when to actuate) Gate Close Gate Close · · Line A Line B Gate Open · Exhaust B · · · Gate Open Gate Close Line A Line B Exhaust B Gate Open Exhaust A Quick Exhaust Valve Solenoid Solenoid (Machine indicates when to actuate) Please confirm all dimensions and nozzle/gating suitability with Husky prior to machining. 2006. 08 165 Design Guidelines CONTROLLER INTERFACE Voltage Supply To determine the correct manifold heater wattage, the available voltage supply must be specified. This practice is necessary since a significant wattage reduction can occur if the lower voltage is not compensated for. For a given heater the power output at 208V is only 75% of that at 240V. Voltage Supply 240 V 208 V Wattage 2, 880 W 2, 160 W Amperage Limitations The amperage limit for each zone of the temperature controller needs to be identified. This ensures that the manifold heaters will not exceed the amperage limit. Electrical Connectors Electrical connectors are supplied with complete hot runner systems (optional for manifold systems). Refer to Electrical Connectors in the Accessories Section for installation information. Connectors are available with either side or end clamps, and top or side entry, depending upon customer preference. Side Clamp End Clamp Please confirm all dimensions and nozzle/gating suitability with Husky prior to machining. 166 2006. 08 Design Guidelines Husky Standard Electrical Connector Requirements Establishing an electrical wiring and connector standard will allow future interchangeability of hot runners and temperature controllers. The following Husky standards have been developed around typical controller capabilities for systems ranging from 2 to 16 drops. The departure from the standards may be required if space is not available or if the current requirements exceed the connectors limitations. 2-8 Drops For applications up to 8 drops, two 24 pin connectors are sufficient: one for power, and the other for thermocouples. 24 Pin (Power) 24 Pin (Thermocouple) Standard connector pin mapping for both power and thermocouples is listed below. Pins for both connectors are rated to 16A. Mold Shut Height Center Section Moving - Side Cavity Plate Stationary-Side Cavity Plate Machine Tie Bars Mold Opening Stroke Sprue Bar Length Example of standard 2 level stack system 2 level stack hot runners come in four configurations: standard, offset sprue bar, stack platen and family mold. 4 level stack hot runners come in standard configurations only. Standard 2 level Standard 2 level stack hot runners are used when molding the same part on both the stationary and moving side of the mold and when the cavity layout allows the sprue bar to pass through the center of the stationary core and cavity plates. Offset sprue bar 2 level Offset sprue bar 2 level stack hot runners are used when the cavities are laid out such that the sprue bar can not pass through the center of the stationary core and cavity plates. Family mold 2 level Family mold 2 level stack hot runners are used to mold different parts on the moving and stationary sides of the mold. These hot runners are available with either a center sprue bar or an offset sprue bar. Stack platens Stack platens are used to run two new or existing single face molds in one machine without making any significant modifications to the molds. [. . . ] Each method is examined in greater detail in the sections that follow. Rack and Pinion Mechanism With the rack and pinion single gear mechanism, two racks are employed per mold side. The top rack is fastened to the clamp side while the bottom rack is fastened to the injection side. Design Considerations: · Machine stroke must be 25, 0 mm (0. 98") less than the mold shut height to ensure that rack engagement is maintained. Rack Mounting to Mold 230, 0mm (9. 06") Keep the Surface of this Area Clear of all Mold Components to Avoid Interference with Racks Please confirm all dimensions and nozzle/gating suitability with Husky prior to machining. 178 2006. 08 Design Guidelines Harmonic Linkage The Harmonic Linkage mechanism is only available for use in a Husky machine. [. . . ]