Fully Automated Six-Side Board Stretch Wrapping Line: Engineering Guide & Kinematic Process

Executive Summary Conventional horizontal orbital wrappers enclose only the four longitudinal faces of a board stack, leaving both ends exposed to moisture penetration, edge crushing, and airborne contaminants during storage and overseas transit. A true six-side wrapping system integrates longitudinal multi-axis wrapping with dedicated end-encapsulation stations along an automated powered roller conveyor. This technical guide outlines the operational kinematics, protective advantages, engineering safety standards (ISO 12100 / EN 415-10), and an exact mathematical model for calculating stretch film consumption per stack under specified overlap and pre-stretch ratios.

Table of Contents

• What the Video Shows: Station Architecture & Process Flow
• How Six-Side Wrapping Works: Kinematic Sequence
• Planning Film Consumption per Stack: Mathematical Model
• Why Close All Six Sides: Industrial Vulnerability Matrix
• Controls and Safety Engineering
• Selection Checklist for a Six-Side Wrapping Line
• Engineering FAQ
• Next Step: 48-Hour Engineering Proposal
• Related Reading
• Sources

What the Video Shows: Station Architecture & Process Flow

The operational footage documents a complete industrial packaging sequence engineered for rigid board stacks, such as gypsum wallboards, PIR/PUR sandwich panels, and decorative architectural sheets:

1. Infeed & Alignment: The incoming stack advances along heavy-duty motorized zinc-plated roller conveyors. Side-guiding rollers align the stack along the conveyor centerline to prevent lateral skewing.
2. Longitudinal Core Wrapping: The stack transitions across a robust intermediate transfer bed. A motorized rotating ring or rotating carriage applies high-tension LLDPE stretch film continuously around the top, bottom, and lateral surfaces.
3. Perpendicular End-Sealing Station: Downstream, the stack enters a perimeter-guarded vertical wrapping tower. This unit rotates or deploys transversal film carriage strokes across the leading and trailing ends, completely encapsulating both open stack faces.
4. Outfeed Discharge: The fully sealed, weather-tight package clears the wrapping cell through powered exit roller tracks, ready for automatic strapping, forklift takeaway, or crane lifting.

How Six-Side Wrapping Works: Kinematic Sequence

Achieving a hermetic, puncture-resistant barrier on heavy panel stacks requires a synchronized multi-station mechanical architecture.

[Infeed Conveyor] ──> [Longitudinal Orbital Wrap] ──> [Transverse End-Wrap Tower] ──> [Outfeed Discharge]
  (Auto-Centering)      (Top / Bottom / Two Sides)       (Leading / Trailing Ends)       (Forklift Takeaway)

By combining orbital rotary motion with perpendicular end-face containment, the line eliminates unprotected gaps, ensuring zero raw substrate exposure during marine shipping and outdoor yard storage.

Planning Film Consumption per Stack: Mathematical Model

Stretch film consumption is determined by stack geometry, film roll parameters, target overlap ratio, and power pre-stretch carriage performance.

1. Calculation Parameters

• Stack Length (L): 2,400 mm (2.40 m)
• Stack Width (W): 1,200 mm (1.20 m)
• Stack Height (H): 600 mm (0.60 m)
• Nominal Film Width (W_film): 500 mm (0.50 m)
• Target Film Overlap Ratio (Overlap): 50% (0.50)
• Power Pre-stretch Ratio: 250% (1 meter of raw film extends to 3.50 meters on product)

2. Formulas

• Cross-sectional Perimeter: Perimeter = 2 × (W + H) = 2 × (1,200 + 600) = 3,600 mm (3.60 m)
• Effective Linear Advance per Ring Revolution: Advance = W_film × (1 - Overlap) = 500 × (1 - 0.50) = 250 mm (0.25 m)
• Longitudinal Wrapping Revolutions (N_long): N_long = (L ÷ Advance) + Reinforcement_Wraps = (2,400 ÷ 250) + 2 = 11.6 ≈ 12 turns
• Applied Film Length on Long Sides: Film_long = N_long × Perimeter = 12 × 3.60 m = 43.2 m
• End-Face Area (Both Ends): Area_ends = 2 × (W × H) = 2 × (1.20 m × 0.60 m) = 1.44 m²
• Applied Film Length on Ends (Multi-layer cross-wrap equivalent): Film_ends ≈ 14.4 m
• Total Film Length on Stack: Film_total = Film_long + Film_ends = 43.2 m + 14.4 m = 57.6 m
• Raw Master Roll Consumption (at 250% pre-stretch): Master_Roll_Length = Film_total ÷ 3.50 = 57.6 ÷ 3.50 ≈ 16.45 m

+---------------------------------------------------------------------------------+
| Stack: 2400 × 1200 × 600 mm | Perimeter: 3.6 m | Overlap: 50%                   |
| Total Applied Film: 57.6 m  | With 250% Pre-stretch -> Raw Film Used: ~16.5 m   |
+---------------------------------------------------------------------------------+

Why Close All Six Sides: Industrial Vulnerability Matrix

Standard 4-side horizontal orbital wrapping leaves the cut ends vulnerable. In heavy manufacturing, these exposed ends frequently cause product rejection.

Controls and Safety Engineering

High-inertia rotary rings and vertical lifting carriages present pinch and impact hazards. Full compliance with international machinery directives is mandatory.

• Safety Standards Scope: Machinery design conforms to ISO 12100:2010 (Safety of machinery — General principles for design — Risk assessment and risk reduction) and EN 415-10:2014 (Safety of packaging machines — General requirements).
• Perimeter Guarding: Heavy-duty steel wire mesh fencing with yellow warning structural posts surrounds the entire motion envelope.
• Access Interlocks: Access doors are fitted with Category 4 / PL d safety interlock switches (EN ISO 13849-1) that trigger immediate safe-torque-off (STO) before personnel can reach hazardous areas.
• Optoelectronic Detection: Infeed and outfeed zones feature Class 4 safety light curtains with muting logic to distinguish incoming board stacks from unauthorized human entry.
• Control Architecture: Central Siemens S7-1500 or Allen-Bradley GuardLogix safety PLC handles multi-axis VFD synchronization, dynamic tension regulation, and pneumatic failsafe braking.

Selection Checklist for a Six-Side Wrapping Line

Use this engineering checklist during initial project scoping:

• Product Dimensions: Minimum and maximum bundle dimensions (Length × Width × Height, mm).
• Total Bundle Weight: Minimum and maximum weight per stack (kg) for conveyor roller loading calculations.
• Required Throughput: Target packaging cycle time (bundles per hour).
• Substrate Sensitivity: Surface finish requirements (e.g., polished metal surfaces requiring pe-coated foam edge protection).
• Environmental Exposure: Expected outdoor storage duration (UV-stabilized stretch film selection).
• Upstream / Downstream Integration: Conveyor top-of-roller (TOR) elevation, automatic labeling, palletizer, or strapping integration.
• Footprint Constraints: Available factory floor space (Length × Width × Clearance Height).

Engineering FAQ

Q: What is the fundamental difference between an orbital stretch wrapper and a six-side wrapper? A: An orbital wrapper rotates film rolls around a horizontal pass-through axis, covering only the top, bottom, and two sides (four faces). A six-side wrapper combines orbital wrapping with an integrated or downstream end-wrapping mechanism that seals the leading and trailing ends, fully enclosing the package.

Q: Can the end-wrapping station keep pace with high-speed board production? A: Yes. The line utilizes buffered conveyor staging. While the orbital wrapper completes longitudinal coverage, the end-wrapping unit simultaneously wraps the previous stack’s ends, maintaining an output of 30 to 60 stacks per hour depending on panel dimensions.

Q: Does six-side wrapping require a separate top sheet applicator? A: In most applications, the cross-overlap of pre-stretched film across the top and ends provides sufficient water shedding. For extreme outdoor storage, an optional top-sheet PE film dispenser can be integrated ahead of the orbital station to provide a continuous waterproof cap.

Q: How does the system prevent thin, flexible boards from bowing under film tension? A: The film carriage features closed-loop electronic tension control with load-cell feedback. Vertical pneumatic stabilization rollers hold the stack flat during wrapping, preventing bow deformation and shifting between panel layers.

Next Step: 48-Hour Engineering Proposal

To automate your board stack packaging line:

1. Submit Product Data: Send bundle dimensions (L × W × H), weight ranges, and required hourly throughput to our applications team at info@fhopepack.com.
2. Receive 3D Layout & Film Plan: Our engineering department will deliver a customized conveyor layout drawing (DWG/PDF) and a calculated film consumption analysis within 48 hours.
3. Engineering Site Alignment: Schedule a technical teleconference or factory survey with our chief project engineer to confirm line integration and safety interlocking.

Related Reading

• Gypsum Board Automatic Packaging Solutions & Orbital Wrappers
• Horizontal Orbital Stretch Wrapping Equipment Overview
• E-Series High-Speed Horizontal Stretch Wrapper Specifications

Sources

• Machine Technical Specifications: FHOPE Packaging Machinery Engineering Documentation, 2026-10-04.
• Kinematic & Film Formula Reference: FHOPE Standard Packaging Calculation Models (LLDPE 250% Pre-stretch).
• Safety Directives & International Standards:
  • ISO 12100:2010 Machinery Safety Guidelines
  • EN 415-10:2014 Packaging Machine Safety Standards

Last Reviewed: 2026-10-04 | Engineering Discipline: Industrial Packaging Automation & Machine Safety System Design