Press-In Inserts

The course external thread of SPIROL's Self-Tapping Insert forms an internal thread within a molded or pre-drilled hole during the installation process into a plastic assembly. SPIROL Series 10 Self-Tapping Inserts are thread forming Inserts best suited for softer thermoplastics or thermosets. Self-Tapping Inserts provide the best pull-out resistance for a post-mold installed Insert, yet generally cost more than their post-mold counterparts. The external threads are designed with a thin profile to minimize induced stress in the plastic and have a relative coarse pitch to provide the maximum plastic shear surface to resist pull-out.

Moulded-In Inserts are placed over core pins by an operator or a pick-and-place robot prior to the closure of the mould cavity during the plastic injection process. Moulded-In Inserts offer exceptional torque and pull-out resistance due to unrestricted plastic flow around the Insert body, and are often the Insert of choice for thermosets and engineered plastics with a high percentage of filler. The minor thread diameter tolerance is controlled to ensure positive positioning and perpendicularity of the Insert on the core pin during the moulding process. Series 63 is symmetrical eliminating orientation and Series 65 is the same body style in a blind ended version. SPIROL's Moulded-In Inserts are made from 2024 aluminium, a light-weight, lead-free grade. SPIROL’s Series 63 and Series 65 Moulded-In Aluminium Inserts are available in thread sizes ranging from M4 (8-32) up to M8 (5/16-18).

Flexible, versatile solutions for post-mold Insert installation into thermoplastic and thermoset plastics. SPIROL's Installation Machines are the ideal foundation for stand-alone systems and enhanced assembly systems provided by SPIROL. Our standardized, time-tested, modular designs are robust, reliable and easily adjustable — allowing simple customisation to meet the specific needs of your application. More than 80% of the components in the Insert Installation Machines we design are pre-tested and production-proven standard items. This translates into faster delivery, greater reliability, and lowest cost for Insert Installation Equipment of comparable quality. We specialize in custom application-specific part holding devices. Fixturing – holding your components accurately and firmly during insertion – is a critical element to the performance of your assembly equipment.

Some of SPIROL's standard Pin Installation Models can be equipped with a pusher punch (in place of a pin insertion quill) to press Threaded Inserts into plastic assemblies. The most appropriate Installation Machine depends on the actual insertion force required to press the Insert into the plastic hole and the desired productivity. Generally speaking, the Model PMH Heavy Duty Installation Machine is typically used for low to medium volume installation, and for medium to high volume installation, SPIROL's Model PH/PHX Platen-Style Installation Machines can be used for simultaneous installation of several Press-In Inserts at the same or different elevations. Due to the length to diameter ratio of Press -In Inserts, it is not possible to cost-effectively tube feed this type of Threaded Insert with SPIROL's automatic feeding and Installation machines.