Injection molding TPU long glass fiber TPU reinforced thermoplastic urethanes
The most suitable processing method of TPU is screw injection molding machine. With a single screw of normal length, a three-stage screw can produce a lot of good plasticized uniform melt. If high plasticizing capacity (production capacity) is required, a longer screw can be used. Injection molding TPU long glass fiber TPU reinforced thermoplastic urethanes twin screw processing.
Screws in the short compression zone are not suitable due to high shear forces. Injection molding TPU long glass fiber TPU reinforced thermoplastic urethanes Plasticization requires high energy and requires high torque drive of the screw. Insufficient torque will cause fluctuations in screw speed and uneven plasticization. Within limits, higher barrel temperatures will produce good results, despite the risk of overheating the material.
The nozzle and screw head path should be designed so that there are no dead angles, so that the material can be injected without being damaged by heat. Key points for precise temperature control of the heating system of the screw barrel and nozzle. The length of the nozzle can be heated evenly. Molten injection molding TPU long glass fiber TPU reinforced thermoplastic urethanes without corrosion and wear.
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