Plastic Bolt Caps and Plugs
Exposed bolts, screws, and nails can pose a safety risk as well as create an unsightly mess.plastic bolt caps Plastic nut caps conceal these fasteners for a clean, finished look. They also protect the fasteners from corrosion, extending their lifespan. Plastic bolt covers are available in a variety of materials to suit different applications and environments, including low-density polyethylene (LDPE), high-density polyethylene (HDPE), thermoplastic rubber (TPR), and a range of specialty plastics.
LDPE and HDPE are two of the most common types of plastic used in cap production.plastic bolt caps They provide excellent chemical resistance and a strong strength-to-density ratio, making them ideal for protecting bolts and other metal hardware from moisture, rust, and corrosion. They are also durable and able to hold up to repeated impacts, making them suitable for demanding industrial applications.
TPR is another popular material for producing caps and plugs.plastic bolt caps This flexible, resilient material combines the flexibility of rubber with the moldability and strength of plastic. It is also impervious to chemicals and can withstand high temperatures, enabling it to shield exposed metal parts from contaminants in harsh environments. The molded structure of these plastics is also incredibly stable, ensuring that the caps won’t easily fall off or lose their shape over time.
While there are a number of different kinds of plastic bolt covers, the most popular are cover caps and dome nut covers. Cover caps, which are typically black in color, are designed to protect exposed bolt, screw, and nut heads from abrasions, debris, and water intrusion. These covers are easy to install by snapping or pushing them on the fastener head. For a more decorative appearance, they can be painted or even decorated with UV additives.
Dome nut covers are similar in design to cover caps but are specifically engineered for use on threaded bolts and screws. They are available in a wide variety of sizes and designs, from standard hexagonal shapes to specialized versions for high-pressure and high-temperature applications. Some are also available with a tab for easy removal and are suitable for use in paint and powder coating applications.
Injection molding is a common technique for manufacturing these plastic caps and plugs. It provides exceptional precision and energy efficiency by optimizing the injection process to minimize cycle times. Cooling and demolding systems are also important for ensuring that the molded products solidify correctly and are free from deformation or damage.
The Nissei ASB Series is a line of injection stretch blow molding machines specially designed for producing plastic bolt caps. Its compact footprint facilitates space-efficient setups and features advanced cooling and ejection systems for efficient production. This series is also equipped with advanced monitoring systems to enhance product quality and streamline operations. These features make the ASB Series ideal for a number of industries and applications, including automotive and aerospace manufacturing. It’s the preferred choice for manufacturers looking to produce a large volume of plastic caps at a competitive price point.