Full definition
Polychloroprene (CR) rubber parts manufactured by placing uncured compound into a heated mold and vulcanizing under heat (150-180°C) and pressure (50-200 bar), producing three-dimensional shapes with precise dimensions and consistent properties. Molding methods: compression (most common for CR — preform placed in open mold, mold closed), transfer (rubber forced into closed mold via piston — for metal inserts and complex shapes), and injection (automated, highest production rate). The balanced property set of neoprene (oil + ozone + flame resistance + dynamic performance) makes it ideal for a wide range of molded industrial parts. Applications: anti-vibration engine and machinery mounts (oil-exposed, outdoor — CR's sweet spot), suspension bushings, bellows and flexible boots, pump diaphragms, expansion joint elements, cable grommets, dust covers, and bridge bearing pads. Typical properties: hardness 40-80 Shore A, tensile 12-25 MPa, elongation 200-500%. Compound is selected based on specific service requirements (temperature, chemicals, dynamic loading). For rubber-to-metal bonded parts (mounts, bushings), metal inserts are pre-treated with primer + adhesive (Chemlok, Chemosil) before molding.