Inserts ultrasonic

Ultrasonic insertion an ultrasonic transducer (horn) vibrates the insert, which heats by vibrating against the plastic. The advantages and drawbacks of this process are ... 

In contrast ultrasonic insertion Fig. 5.50 is where a hole is pre-moulded in the plastic (slightly smaller than the metal insert) and the horn is used first to melt the plastic before driving the insert into place. 

Heat and ultrasonic inserts. Fig. 14.4(c), can only be used Figure 14.4. Threaded inserts for plastics materials in thermoplastics materials and are available in brass from M3... 

Heat and ultrasonic inserts. Fig. 15.4(c), can only be used in thermoplastics materials and are available in brass from M3 to M8. Heat inserts are used for low-volume production. The insert is placed on the end of a thermal insert tool and heated to the correct temperature, depending on the type of plastics component and pressed into a pre-drilled or pre-moulded hole. The plastic adjacent to the insert is softened and flows into the grooves to lock the insert in place. The thermal insert tool is removed and the plastic re-solidifies. 

Figure 11-80. These examples of ultrasonic inserts, designed for excellent performance, result in fast action with very little induced stress.

Ultrasonic insertion is a fast and economical method of installing metal inserts into parts. This technique offers a high degree of mechanical reliability with excellent pull-out and torque retention combined with savings resulting from rapid production cycles. If the assembly is properly designed, ultrasonic insertion results in lower residual stress compared to molded-in or pressed-in techniques since a uniform melt occurs and a minimum amount of thermal shrinkage is involved. 

Table 5-13 illustrates the parameters of ultrasonic insertion of various screws in a 30%-glass-reinforced polyester (VALOX). 

TABLE S-13. ULTRASONIC INSERTION OF 30% 6LASS-REINF0RCE0 POLYESTER (VALOX) ... 

Ultrasonic insertion for introducing metal inserts into plastic parts for subsequent fastening operations. 

Threaded inserts are inserted via a variety of methods molded in during injection molding process, ultrasonic insertion, threaded, and thermal insertion. There are essentially two types of threaded inserts, those that maintain their shape and those that expand as the screw is driven into the insert. 

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