Jewelry Lobster Lock Fish Lock Full Line Automatic Making Machines

This equipment solves one specific problem: manual welding and manual spring-fitting for lobster clasps are slow and produce inconsistent quality. A four-stage automated line — stamping, laser bending/welding, automatic spring installation, and final assembly — replaces manual welding and spring insertion, enabling continuous production of clasps from 9mm to 32mm.

1. How does the bending-welding stage guarantee consistent strength and sizing?

After stamping produces the flat "film sheet," a dedicated bending-welding unit forms the clasp body and welds it in one automated pass, instead of a worker hand-welding each piece.

Measured rate: This stage (Step 2: Bending and Welding, Grip making by laser) is rated at 20–30 pieces/minute, which works out to roughly 1,200–1,800 pieces/hour per unit.

Because bending and welding happen in one automated pass, the fold angle and weld point are executed the same way on every piece — this is also why the spec sheet lists this stage as its own dedicated station rather than folding it into stamping or assembly.

2. How does automatic spring installation solve the missed-spring problem in manual assembly?

The clasp body ("chip") and spring need to be fitted precisely; manual insertion is prone to missed or misaligned springs.

Measured rate: The automatic spring installation stage (Step 3) is rated at 30–40 pieces/minute, roughly 1,800–2,400 pieces/hour — faster than the bending-welding stage before it.

This means in an actual production line, the bending-welding station (20–30 pieces/minute) is the real bottleneck, not spring installation. The spring station has spare capacity and can be paired with multiple welding stations to avoid idling.

3. How does one line handle different sizes and patterned finishes?

The spec sheet lists three model series:

• 301–310 series: 10mm–32mm (including patterned finishes on models 308, 309B, and 310)
• 800–806 series: 9mm–25mm (silver-tone, barrel style)
• 901–906 series: 10mm–27mm (gold-tone)

Step 1 (Mold & Punching) is configured with 2 mold sets as a baseline — switching sizes or shapes is a mold change, not a line rebuild. The bending-welding, spring-installation, and final-assembly stages downstream are shared across both plain and patterned styles.

FAQ

Q1: What is the overall line cycle time? The line's overall throughput is capped at 20–30 pieces/minute (1,200–1,800/hour), set by the bending-welding stage. Spring installation runs faster (30–40/minute), so it isn't the bottleneck.

Q2: Do patterned models (e.g., 309B, 310) require separate equipment? No line rebuild is needed — only a mold change. Step 1 already ships with 2 mold sets, and the bending-welding, spring-installation, and assembly stages are shared between plain and patterned styles.

Q3: What clasp sizes can this line produce? Sizes from 9mm to 32mm, across the 301–310, 800–806, and 901–906 series, covering both plain and patterned (textured) finishes.

Q4: Which stage is more likely to bottleneck production, welding or spring installation? Bending-welding (20–30 pieces/minute) is slower than spring installation (30–40 pieces/minute), making it the actual bottleneck. Adding welding stations is the priority when scaling capacity.

Q5: How many stages does raw material go through to become a finished clasp? Four stages: stamping → laser bending/welding into the clasp body → automatic spring installation → automatic final assembly — run in sequence with no manual handoff in between.

Q6: How does laser bending-welding differ from traditional manual welding? Laser bending-welding merges shaping and welding into one automated station running at a fixed rate (20–30 pieces/minute), instead of relying on a worker's hand precision piece by piece.