PCB Straight Tab Terminal Insertion for Through-Hole Assembly
A PIN terminal insertion machine is a type of automated equipment designed for the assembly of through-hole components, specifically straight tab or pin terminals, onto printed circuit boards. This machine addresses a specific gap in the standard SMT assembly process, which is optimized for surface-mount devices. While SMT lines handle the majority of components, many PCBs still require a small number of robust through-hole connectors, terminals, or pins for mechanical strength or high-current applications. Manually inserting these is slow and inconsistent, and a dedicated wave soldering step for just a few parts is inefficient. This insertion machine provides a targeted automated solution. The machine operates by taking loose pin terminals from a bulk supply, typically fed via a vibrating bowl feeder. The bowl orients the terminals correctly and presents them one at a time to a pick-up mechanism. A pneumatic or servo-driven insertion head then collects the terminal and presses it into the pre-drilled hole on the PCB. The machine is programmed with the X-Y coordinates of each insertion point, often through a simple teach-and-repeat method or by importing CAD data. For stability, the PCB is securely clamped on a fixture or conveyor during the process. The insertion force is controlled to ensure the terminal is fully seated without damaging the board. Some models may include a subsequent clinching operation to slightly bend the leads on the bottom side, temporarily securing the part before soldering. Yinuo Electronics Key specifications for such a machine include the range of terminal sizes it can handle, typically defined by pin diameter and length. For example, it may accommodate pins from 0.5mm to 2.0mm in diameter and 3mm to 15mm in length. The insertion accuracy is critical, usually within ±0.1mm, to ensure pins align with plated through-holes. Cycle speed is another important metric, with capable machines achieving 5,000 to 8,000 insertions per hour. The machine footprint is compact, designed to fit into an existing assembly line, often just after the SMT placement and before any soldering stage. This equipment is used in scenarios where PCBs require a mix of SMD and through-hole components. Common applications include automotive control units needing sturdy connector pins, power supply boards requiring high-current terminals, and industrial controller boards with external interface headers. By automating this specific insertion task, manufacturers eliminate a manual bottleneck, improve placement consistency and reliability, and can often avoid a separate, low-volume wave soldering process by sending the board to a selective soldering machine instead. This makes the overall assembly flow more continuous and cost-effective for mixed-technology PCB production. Yinuo Electronics Co., Limited www.esmte.com www.all-aismt.com www.allaismt.com www.aismtpro.com www.fujinxt.com Email: [email protected] WhatsApp: +86 137 6048 1664