Heat stacking

Heat stacking enables the assembly of two or more pieces with atleast one being plastic. The process consists in distorting the plastic by heat and force for a set time. Assembly is achieved by partially distorting the plastic part with the help of a formed hot riveting die to match the other part.

When is it appropriate to choose heat stacking?

This assembly process allows temporary mechanical bonding and is used during a given period of time before the dispensing of a seal, the potting or is used on the parts that are moderaly stressed (brand logo, aesthetic parts, control panel ...).

It is typically used in low-cost/high volume applications for example in the construction of automobiles, computers and of electrical whitegoods. We engineer and produce snap riveting systems integrated in a dedicated station which combines:

    • the PLC system,
    • the specific tooling for products
    • and the heating system

Our technical knowledge of the three types of heat stacking:

    • Heat stacking performed with hot riveting dies (each riveting die being thermo-regulated independantly or riveting dies heated via a heating brick)
    • Heat stacking as per ""Cold riveting die"". In this case, the plastic material to be riveted is heated beforehand by hot air or halogen lamps, then distorted by the cold riveting dies with (direct or indirect) height control of the latter.
    • Heat stacking using thermode as per Miyachi process.

We custom-design the riveting tooling to match the constraints of your products. We collaborate with your engineering department during the product engineering phase to design the shape of the pins to be riveted. The choice of plastic also plays an important part in the success of the final assembly.