| Metal Preparation | Sheet Slitter and Scroll Shear | Blank preparation | Tinplate and electrolytic chromium-coated steel sheets | Cuts large metal sheets into accurately sized body blanks or component strips. | Sheet thickness commonly about 0.15–0.40 mm, depending on design and material. | Servo feeding, programmable cutting length, edge-trim control and scrap collection. |
| Three-Piece Can Forming | Body Welder | Can body assembly | Tinplate or steel aerosol can bodies | Forms a cylindrical body and joins the longitudinal side seam using electric resistance welding. | Production speed varies widely; industrial systems commonly operate from several dozen to several hundred cans per minute. | Controlled welding current, seam overlap adjustment, cooling system and automatic fault detection. |
| Three-Piece Can Forming | Bottom-End Seamer | Bottom closure assembly | Steel aerosol bodies with separate bottom ends | Attaches the bottom end to the cylindrical body by forming a double seam. | Usually configured for continuous high-volume operation; exact speed depends on diameter and seam design. | Double-seam rollers, seam-thickness monitoring, automatic end feeding and pressure-resistant construction. |
| Two-Piece Can Forming | Impact Extrusion Press | Aluminum can body production | Aluminum slugs for seamless monobloc aerosol cans | Shapes an aluminum slug into a seamless cup and elongated can body in one forming operation. | Press capacity is selected by can diameter, wall thickness, height and alloy; high-volume lines use automated slug feeding. | High forming force, automatic lubrication, die-temperature control and integrated transfer systems. |
| Can Body Finishing | Trimmer and Necking Machine | Top-end forming | Aluminum or steel aerosol bodies | Trims the open end and reduces or profiles the neck to accept the valve cup and mounting assembly. | Commonly arranged in multiple forming stations; the number of necking steps depends on the required profile. | Progressive tooling, synchronized transfer, dimensional inspection and low-damage handling. |
| Internal Protection | Internal Lacquer Spray and Curing Oven | Interior coating | Steel and aluminum cans requiring product-contact protection | Applies a protective internal coating to reduce corrosion, chemical interaction and product contamination. | Coating and curing parameters depend on lacquer chemistry, film thickness and oven design. | Uniform spray coverage, exhaust filtration, temperature zoning and coating-thickness inspection. |
| Exterior Decoration | Can Printing and Coating Line | Decoration and protective finishing | Metal cans and preformed aluminum aerosol bodies | Applies base coats, printed graphics, varnishes or protective overcoats to the outside surface. | Line speed is determined by can diameter, number of colors, ink system and curing method. | Registration control, inline curing, color monitoring, surface inspection and quick-change tooling. |
| Valve Assembly | Valve Component Assembly Machine | Valve preparation | Metered-dose or continuous-spray valve components | Assembles the valve stem, spring, gasket, housing and actuator interface before can insertion. | High-speed rotary or linear systems are available; output depends on component count and inspection requirements. | Part orientation, presence detection, spring and gasket verification, and automatic reject handling. |
| Valve Mounting | Valve Insertion and Crimping Machine | Valve attachment | Pressure-rated aerosol cans with compatible valve cups | Places the valve assembly on the can and crimps the valve cup to create a pressure-tight closure. | Crimp diameter, depth and force are set according to the valve-cup and can-neck specification. | Force and position monitoring, automatic valve feeding, crimp-dimension checks and reject separation. |
| Product Filling | Liquid Product Filler | Filling before or after valve installation | Water-based, solvent-based, foam, gel and other aerosol formulations | Doses the formulation into the can at a controlled mass or volume. | Filling accuracy depends on product viscosity, foaming behavior, temperature and selected metering technology. | Mass-flow or piston dosing, closed product circuits, hygienic design and recipe-based control. |
| Propellant Charging | Propellant Gassing Machine | Pressurization | Aerosol cans using liquefied or compressed propellants | Adds the specified propellant charge through the valve while controlling pressure and dosage. | Charge quantity and pressure depend on formulation, propellant type, can volume and temperature. | Explosion-protected electrical design, gas detection, ventilation, grounding and closed-loop weighing. |
| Safety Testing | Leak Tester and Pressure-Test System | Quality assurance | Filled and pressurized aerosol containers | Detects leakage around the can body, seam, bottom, valve crimp and other pressure boundaries. | Testing method may include water-bath inspection, pressure decay, helium detection or automated gas analysis. | Non-destructive testing, calibrated sensors, automatic reject gates and traceable test records. |
| Final Assembly | Actuator and Overcap Fitting Machine | Final component installation | Aerosol cans with spray actuators, buttons, caps or protective overcaps | Installs the actuator and protective cap, then checks the external appearance and fit. | Output is matched to the upstream filling and testing line to prevent accumulation or starvation. | Automatic part orientation, cap-presence inspection, snap-force control and vision inspection. |
| Inspection and Packaging | Vision Inspection, Weighing and Case Packer | End-of-line processing | Finished aerosol cans in multiple diameters and heights | Verifies label or print quality, cap presence, fill weight and general appearance before packing. | Inspection speed is synchronized with the filling line; changeover depends on container dimensions and pack pattern. | Barcode or code verification, checkweighing, reject tracking, carton forming and pallet-ready packing. |