Injection Pen Assembly Line — Pre-Assembly and Final Assembly Solutions
Product Introduction
Manufacturing an injection pen at commercial scale requires two distinct but interconnected production stages. Pre-assembly transforms molded plastic components — pen bodies, dose selectors, clutch mechanisms, and drive sleeves — into a structurally complete pen body. Final assembly integrates the drug-filled cartridge into that pen body, sets the dosing mechanism, performs force-controlled joining, and verifies device function through 100% inline testing.The engineering challenge is not building two separate machines.
It is ensuring that both stages share a unified control architecture, a common data backbone, and consistent process parameter management — so that a deviation detected at final assembly can be traced back to its root cause in pre-assembly without cross-referencing disconnected systems.
DROFEN machinery provides both stages as a unified platform: Siemens S7-1500 controllers, Profinet communication backbone, electronic camming for motion synchronization, and a single audit trail architecture covering every station from first component pick to final functional test.
DROFEN machinery provides a complete range of insulin pen assembly machine solutions — from pre-assembly to final assembly — engineered for high-speed, zero-defect pharmaceutical production.
-
![Automatic Insulin Injection Pen Pre-Assembly Machine]()
Automatic Insulin Injection Pen Pre-Assembly MachineCam-driven continuous-motion pen injector pre-assembly machine assembling 8–12 molded plastic components into structurally complete pen mechanisms at 160 pens per minute. The system features aread more -
![Automatic Insulin Injection Pen Final Assembly Machine]()
Automatic Insulin Injection Pen Final Assembly MachineAutomatic pen injector final assembly machine integrating drug-filled cartridges into pre-assembled pen bodies at 160 pens per minute. The system employs a 2-cell modular architecture with 24read more
Platform Technical Specifications
| Parameter | Specification |
| Assembly Speed | Up to 160 pens per minute (pre-assembly and final assembly) |
| Drive Architecture | Mechanical cam (main shaft) + servo on critical stations (press-fit, winding, labeling) |
| Motion Synchronization | Inherent mechanical cam synchronization — deterministic timing |
| Force Monitoring | KISTLER load cells — 100% force-displacement curve per unit |
| Dimensional Verification | Keyence LVDT + vision inspection at multiple stations |
| Control System | Siemens S7-1500 + TIA Portal + WinCC Unified HMI |
| Network Architecture | Profinet + IO-Link + Ethernet (cell-to-cell communication) |
| Data Compliance | 21 CFR Part 11 audit trail | Electronic batch records | GAMP 5 |
| OEE Target | ≥85% validated through FAT/SAT protocol |
| Changeover | Recipe-driven format change (60IU/80IU, 1.5mL/3.0mL) — 30-45 minutes |
| Cleanroom Compatibility | ISO Class 7 / GMP Grade C (stainless steel construction, FDA-compliant seals) |
System Modules
Modular platform covering the complete pen injector manufacturing process:
8–13 molded plastic components assembled into structurally complete pen mechanisms. Cam-driven continuous motion, 160 PPM, 5-cell modular architecture, 26 servo axes.
01
Cartridge press-fit, dose mechanism integration, KISTLER force-displacement monitoring, and 100% inline functional testing. 2-cell architecture, 24 stations, 160 PPM.
02
Inline Inspection & Testing
KISTLER force-displacement curves, Keyence LVDT dimensional verification, vision-based alignment check — integrated as dedicated stations within the assembly line.
03
Labeling & Palletizing
High-speed thermal transfer labeling, 3-point label verification, automatic reject, and XYZ gantry palletizing — fully integrated downstream of assembly.
04
Applications
Engineered for commercial-scale injectable drug delivery device manufacturing:
Insulin Pen Assembly — High-volume production lines for fixed-dose and variable-dose insulin pen platforms (60IU / 80IU / 1.5mL / 3.0mL cartridge formats).
GLP-1 Pen Device Production — Capacity expansion for semaglutide, liraglutide, and tirzepatide pen injector platforms with recipe-driven format changeover.
CDMO Greenfield Projects — Turnkey delivery from URS through IQ/OQ/PQ validation for contract manufacturers entering the injectable pen market.
Capacity Expansion Programs — Modular cell addition to existing lines without re-validation of installed equipment.
Technical Resources
• PharmTech: Overcoming Fill-Finish Capacity Bottlenecks in Automated Pen Injector Assembly Lines
• White Paper: The Complete Technical Guide to Injection Pen Assembly Lines
• White Paper: Selecting and Implementing High-Speed Pen Injector Final Assembly Systems
• White Paper: Selecting and Implementing High-Speed Pen Injector Pre-Assembly Equipment
• Implementing 21 CFR Part 11 Data Integrity in High-Speed Pen Device Assembly
• Automatic Insulin Pen Assembly Line: Complete Guide to High-Speed Manufacturing
DROFEN engineers industry-leading pen injector assembly lines capable of processing up to 160 pens per minute. Our portfolio covers both high-cavity pre-assembly machines for plastic mechanisms and precision final assembly machines for drug cartridge integration. Utilizing KISTLER force-displacement monitoring, Keyence vision systems, and Rexroth servo-camming, our equipment ensures 100% mechanical functional testing and 21 CFR Part 11 compliance. Whether you are producing insulin pens, GLP-1 autoinjectors, or disposable cartridge devices, DROFEN provides the turnkey assembly automation required for zero-defect pharmaceutical manufacturing.