After cooling, biscuits must be stacked neatly before packing. The magnetic system stacker uses precision alignment and gentle handling to position biscuits layer by layer without cracking or misalignment. Soni Engineering Works manufactures both Star Wheel and Penny Type stackers
Stacker Types and Their Purpose
The stacker type determines how biscuits are aligned and layered. Each design suits different product shapes and production speeds.
Stacker Type | Alignment Method | Best For |
Star Wheel | Rotating wheel guides biscuits into position | Round/oval biscuits (Marie, butter biscuits) |
Penny Type | Rotating disc with pockets holds biscuits | Square/rectangular biscuits (crackers, digestives) |
Star Wheel stackers use rotating wheels with curved guides that gently push biscuits into aligned rows. The curvature matches biscuit diameter, preventing edge damage. Penny Type stackers use rotating discs with individual pockets that hold each biscuit securely during transfer. This prevents shifting for products with straight edges.
Poor stacking creates three downstream issues. First, misaligned layers cause uneven pressure during packing, leading to broken biscuits. Second, inconsistent stack height affects pack weight accuracy and creates compliance risk. Third, rough handling damages biscuit edges, affecting pack presentation and consumer perception. Soni’s magnetic system stackers feature electromagnetic alignment for precise positioning, stainless steel contact surfaces for hygiene compliance, and adjustable speed to match line throughput. Stacking speeds range from 50 stacks/min to 300 stacks/min, covering trial batches to full-shift operation. Band widths match standard production line sizes (32″, 48″, 60″).
Choose based on biscuit shape. Star Wheel stackers use rotating curved guides that match round/oval biscuit diameters, making them ideal for Marie and butter biscuits. Penny Type stackers use rotating discs with individual pockets that hold square/rectangular biscuits securely, making them best for crackers and digestives. Match the stacker type to your product geometry.
For small to mid-scale manufacturers, 50–150 stacks/min is standard. For high-capacity operations, 150–300 stacks/min supports fast-line throughput. Match the stacking speed to your oven and cutter output rates. Contact Soni’s team with your production capacity for the right specification.
Yes. Soni’s magnetic system stackers feature adjustable guides and speed control that allow one unit to handle different biscuit shapes. However, for optimal performance, Star Wheel is best for round/oval products and Penny Type is best for square/rectangular products. Contact Soni’s team to confirm the best configuration for your product range.
