Stainless Steel 304 Gusseted Bag Forming Shoulder with Customized Gusset Depth and Smooth Polished Film Path for Vertical Packaging Machines

The ZHIJING Gusseted Bag Forming Shoulder is a precision replacement component for the forming stations of vertical packaging machines that produce side gusset bags. Gusseted bags, widely used for coffee, pet food, powders and granular snacks, are formed by folding the flat film into a tube with two inward side creases before the vertical seal is made. That geometry demands a forming shoulder with exactly calculated crease paths; a small deviation shows up immediately as wrinkled gussets, misaligned seals or unstable bags on the packaging line. This shoulder is manufactured from stainless steel 304 with a smooth, low-friction surface so the film glides through the former at speed without scratching or stretching.

Every gusseted former is built around your actual bag specification: bag width, gusset depth, film width and tube dimensions are confirmed with your engineering team before production, and the finished part is checked against a test former drawing so installation is straightforward. The stainless steel 304 body resists rust and corrosion from food products, washdown cleaning and humid production environments, which keeps the film path clean and the machine reliable year after year. With a working range of 50 mm to 800 mm bag width, this forming shoulder suits small sachet lines as well as large multi-head vertical form-fill-seal machines producing heavy-duty gusseted bags.

• Accurate Gusset Crease Geometry: Precisely calculated crease paths fold both side gussets evenly, preventing wrinkles and producing stable bag shapes at high output.
• Stainless Steel 304 Construction: The rustproof body withstands food contact, wet cleaning and humid packaging halls without corrosion or surface pitting.
• Smooth Low-Friction Film Path: The polished forming surface lets film glide freely, reducing drag, static build-up and the risk of scratching printed web.
• Wide 50-800 mm Bag Width Range: The same proven design can be scaled from small sachet formers to large bag machines producing heavy gusseted packaging.
• Custom Manufactured to Your Line: Bag width, gusset depth, film width and mounting are all confirmed against your drawings and original former before production.
• Long Service with Minimal Wear: High-grade stainless and smooth finishing keep the former dimensionally stable through millions of bags.

This gusseted forming shoulder is used on vertical form-fill-seal machines producing side gusset bags for coffee beans and ground coffee, pet food, rice and grains, milk powder, detergent powder, snacks and frozen food. It is equally suitable for smaller sachet machines where precise gusset folding is required at high cycling rates. Because the former is manufactured to your exact specification, it can replace the original shoulder on almost any VFFS brand, and the same material and geometry approach is available for related parts such as forming tubes, collar assemblies and film guiding plates. Share your bag drawing, film width and machine model with our engineers, and we will confirm the correct former geometry before we cut any steel.

Formed surfaces are protected with soft wrapping and anti-scratch interleaving before being packed in carton boxes or plywood cases, so the polished film path arrives in perfect condition. ZHIJING is an ISO9001 certified manufacturer: material certificates verify the stainless steel grade, dimensions are confirmed against approved drawings, and every former passes a final surface and fit inspection before dispatch. Pre-production samples are available for critical orders. OEM and ODM projects are welcome, and our engineers provide fast technical support for former selection, installation and line tuning to help you reach target output from the first day.