The SYM-21A Invisible Auto Top Stop Machine is a fully automatic machine designed for inserting slides onto invisible zippers. Featuring a dual-cylinder positioning mechanism and servo-driven feeding, it achieves 2,500 pcs/hr with precision and consistency. Ideal for manufacturers specializing in concealed zippers for dresses, skirts, and formal wear.
Average Output
2,500 pcs/hr
Power
0.5 kW
Net Weight
≈ 137 kg
Applicable Specs
#3I, #4I, #5I
12-Month Warranty
Global Shipping
Lifetime Support
CE Certified
High-speed precision top stop forming. Professional invisible zipper top stop machine engineered for continuous production of concealed zippers — consistent stop forming, precise positioning, and reliable output at industrial scale for dresses, skirts, and fashion garments.
Production speed up to 2,500 pcs/hr
Combined cylinder and servo motor system for precise slider mounting
Compatible with various automatic and spring-loaded sliders
Servo-driven motor with PLC touch-screen controls
Consistent fold quality across all fabric types
Free remote installation & operator training
High-speed precision top stop forming. Professional invisible zipper top stop machine engineered for continuous production of concealed zippers — consistent stop forming, precise positioning, and reliable output at industrial scale for dresses, skirts, and fashion garments.
Every SYM-21A includes Shunye’s standard 12-month warranty, free remote installation support, operator training, and lifetime technical assistance via WhatsApp and email.
Everything you need to know before placing an order for the SY-I100
We don't just sell zipper machines — we partner with you for long-term success. Here's what's included with every SY-I100 purchase.
All wearing parts kept in stock. Shipped within 3–7 business days worldwide via DHL/FedEx.
Technical issues addressed within 24 hours via WhatsApp video call, email, or remote desktop.
Full operator training videos + PDF manuals provided. On-site training available for bulk orders.
No expiration on tech support. Our engineers are available for troubleshooting even after warranty.


Fill in your details and we'll reply with pricing, lead time, and shipping options within 24 hours.
SYM-21A Invisible Auto Top Stop Machine