What Spare Parts Should You Stock for SPV5 Machines

The injection unit operates under the most demanding conditions in thin-wall molding, with screws rotating at up to 300-390 rpm and injection speeds reaching 368-560 mm/s. Stock the following injection unit spares for each SPV5 machine. One complete screw tip and check ring assembly matched to your screw diameter of 50-67 mm, as the check ring is the highest-wear component, typically requiring replacement every 8-15 million shots. The check ring sealing surface erodes from the abrasive nature of high-MFI PP flowing at pressures up to 182 MPa, causing shot weight variation when wear exceeds 0.1 mm. Stock one spare nozzle tip in the appropriate bore size for your Herzog nozzle assembly, as contact with the mold sprue bushing causes wear and potential cold slug issues. Keep two spare barrel liner segments for the feed zone, which wears fastest due to unmelted pellet friction. The screw flight hardened overlay has a typical life of 20-30 million shots for PP processing, but stock one spare screw of the appropriate diameter. Total injection unit spare parts cost ranges from 3,000-6,000 USD depending on the model.

The SPV5 barrel has 6 heating zones maintaining PP melt temperature at 200-260 degrees Celsius, with total heater power of 22.5-36.1 kW depending on the model. Stock a minimum of 3 spare heater bands in each size used on your specific model, as heater bands are the most frequently replaced electrical component, with an average life of 12-18 months in continuous operation. Identify the wattage and dimensions for each zone from the INOVA controller electrical diagram. Keep 6 spare J-type or K-type thermocouples for the barrel zones, as these cost only 15-30 USD each but a failed thermocouple causes temperature runaway that can damage the screw and barrel. Stock 2 spare nozzle heater bands and 2 nozzle thermocouples separately, as the nozzle area experiences the most thermal cycling. For hot runner molds with YUDO or Synventive systems, maintain a set of spare hot runner heater cartridges and thermocouples specific to your mold configuration, typically 8-24 heaters for an 8-cavity mold. Keep one spare solid-state relay for the heater control circuit, as SSR failure is the second most common temperature-related fault. Total temperature component spare parts cost approximately 800-1,500 USD.

The INOVA controller is highly reliable, but certain peripheral electrical components should be stocked. Maintain one spare 24V DC power supply module for the controller I/O system, as power supply failure disables all digital inputs and outputs. Stock 2 spare proximity sensors for the mold safety circuit, specifically the mold-close-limit and mold-open-limit sensors that cycle millions of times. Keep one spare encoder for the screw position measurement, as this component directly affects shot size accuracy and charging-on-fly performance. Stock spare fuses in all ratings used in the electrical cabinet, organized and labeled in a dedicated fuse kit. Maintain one spare safety relay module for the machine safety circuit, which cannot operate with a failed safety relay. For the servo motor drives, keep the manufacturer-recommended spare drive module, though these are expensive at 2,000-5,000 USD and may alternatively be covered by a service agreement with HWAMDA for overnight delivery. Stock spare connector cables for robot interface communication between the INOVA controller and SWITEK side-entry robot, as these cables experience vibration fatigue. Total controller and electrical spare parts cost approximately 1,500-3,500 USD.

Organize your SPV5 spare parts inventory using a systematic approach. Create a dedicated, climate-controlled storage area near the production floor with labeled bins for each component category. Maintain a digital inventory system recording part number, quantity on hand, reorder point, lead time from HWAMDA or authorized distributors, and unit cost. Set reorder points based on consumption history and lead times, typically reordering when stock drops to 1 unit for critical components. For critical components with lead times exceeding 2 weeks, maintain 2 units in stock. Conduct quarterly inventory audits to verify stock levels and check expiration dates on rubber seals and O-rings, which degrade after 3-5 years in storage. Negotiate a consignment stock agreement with HWAMDA for high-value components like servo drives and proportional valves, where you hold the parts but pay only upon consumption. For multi-machine facilities running 3 or more SPV5 machines, many spare parts can be shared across machines, reducing the per-machine stocking cost by 30-40%. Maintain a relationship with HWAMDA after-sales service for emergency parts delivery within 24-48 hours to the nearest port.