Determining The Right Part Joint Design For The Desired Welding Method.
No matter which plastic assembly operation you choose, proper selection and design of component materials (i.e. stakes, joints, etc.) are critical to achieve strong fit-for-purpose welds. The pages linked below will give you an initial sense of which operations/parameters are best for the results you’re trying to achieve. As always, we welcome you to contact PAS for additional guidance.
Standard Flared Stake
Spherical Stake
Hollow Stake
Staking a hollow boss produces a large, strong head without having to melt a large amount of material. Also, the hollow stake avoids sink mark on the opposite side of the component and enables the parts to be reassembled with self-tapping screws should repair and disassembly be necessary.
Knurled Stake
The knurled stake is used in those staking applications where appearance is not critical. Since alignment is not an important consideration, the knurled stake is ideally suited for high volume production. Knurled tips are available in a variety of fine, medium and coarse configurations.
Flush Stake
The flush stake is used for applications requiring a flush surface. The flush stake requires that the retained piece has sufficient thickness for a chamfer or counterbore.
SONIC JOINT DESIGN
Perhaps the most critical facet of ultrasonic welding is joint design.
SPIN WELDIN JOINT DESIGN
Spin Welding Joint Design is critical for a proper spin weld.
