Horizontal injection molding machine PolySet

hydraulicfor BMCfor thermosetting polymer

Product information
With PolySet technology, we can offer the processing of thermosets in the form of doughy polyester or vinyl ester compounds into high-quality technical components. In contrast to thermoplastics, thermosets cannot be remelted. Thermosets react irreversibly when heat is applied in a hot mold. Adapted machines and processes are required to process these reactive molding compounds. Even the condition of the raw materials differs significantly from the granulates commonly used for thermoplastics. The processing parameters also differ greatly from the usual values for thermoplastics. For example, the tools are usually electrically heated to 150 - 200 °C, while the plasticizers are tempered or cooled with water or heat transfer oil.

Key benefits

• Minimized maintenance effort due to self-cleaning hopper
• Unique torque dependent fill level monitoring for automatic feeder (AZ)
• Highest process stability with APCplus for outstanding productivity
• No machine down-time during material feeding with Polyload system
• Homogeneity and quality through tamping pressure control
• Strong network and expertise for processing reactive molding compounds

Polyload automatic feeding unit (AZ)
The Polyload AZ50 and AZ100 screw feeders ensure gentle, pressure-controlled feeding of dough-like molding compounds. Unlike conventional piston feeders, screw feeders enable material to be fed without air pockets and the feed hopper to be refilled without interrupting the cycle. Polyload AZ50 and AZ100 with 50-liter and 100-liter feed volumes – the right dosing device for small and large shot weights.

Material handling Polylift
Material conveyor system Polylift in combination with the unique torque dependent filling level monitoring enables automated refilling of the Polyload AZ. Optimized operator ergonomics thanks to material refilling at an optimal height from the ground level without the need for ladders or platforms.

Non-return valve PolySet
The PolySet non-return valve for dough-like BMC and SMC materials combines a generous flow geometry to prevent fiber breakage with an optimized, reliable closing behaviour.

Plunger nozzle
Watercooled extended nozzle prevents premature cooling and enables reduction of runner length.

Vacuum control
Air entrapments and burned areas on the product are prevented thanks to the standard process active venting or, in case of more complex parts, via the optional mold vacuum control.

Caractéristiques / spécifications techniques

• Technology type: Processing of dough-like thermoset compounds (polyester, vinyl ester) into cross-linked parts
• Typical tool heating: electrically heated mold temperatures about 150 - 200 °C
• Material temperature control: plasticizers tempered or cooled with water or heat transfer oil
• Feeding units: Polyload AZ50 (50 L) and AZ100 (100 L) screw feeders for pressure-controlled feeding
• Feeding features: torque-dependent fill level monitoring; continuous refill without cycle interruption
• Process stability: integration with APCplus for highest process stability and productivity
• Mold handling: optional mold vacuum control available to avoid air entrapment
• Nozzle technology: water-cooled extended plunger/nozzle to avoid premature cooling and allow shorter runners