Injection molding continuous

The liquid monomers are suitable for bulk polymerization processes. The reaction can he conducted in a mold (casting, reaction injection molding), continuously on a conveyor (block and panel foam production), or in an extruder (thermoplastic polyurethane elastomers and engineering thermoplastics). Also, spraying of the monomers onto the surface of suitable substrates provides insulation barriers or cross-linked coatings. 

Polystyrene Low cosi. moderate heat distortion, good dimensional stability, good stiffness, impact strength Injection molding Continuous laminating... 

Vinyls Excellent wealherability, superior electrical properties, excellent moisture and chemical resistance, self-extinguishing injection molding Continuous laminating Rotational molding... 

The temperature control of an injection mold has to fulfill two main tasks (Figure 2.77). In compliance with the required quality and part properties as a result of the amount and uniformity of temperature distribution in the mold, the injection mold continues to have the task to evenly dissipate the introduced heat in a very short time. Here, quality and efficiency often oppose each other. 

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