Patent-Backed Laser Drilling for Two-Chamber Osmotic Tablets: Problems Solved, Advantages Secured

Patent-Backed Laser Drilling for Two-Chamber Osmotic Tablets: Problems Solved, Advantages Secured

The practical issues in drilling two-chamber osmotic tablets are well known: wrong-side holes, inconsistent diameters, and weak inline verification. This article explains the core problems and how the CN2642449Y patent solves them with a closed-loop, production-ready architecture—backed by HUANGHAI’s patented solutions.

The Problems You Actually Face

  • Wrong-side drilling: The release orifice must be on the drug-layer side. Any mix-up ruins the release profile.
  • Inconsistent hole presence/size: Missing or undersized holes shift dissolution and make lot-to-lot control difficult.
  • Human-dependent checks: Manual inspection is error-prone and can’t keep up with continuous flow.
  • Fragmented handling: Flipping, rechecking, and sorting are often split across devices, increasing misfeeds and rejects.

How CN2642449Y Solves These Problems

CN2642449Y discloses an integrated, fully automatic system that links feeding, face detection, optional flipping, CO2 laser drilling, camera inspection, and good/reject sorting under a single controller.

  • Ensures correct side: Dual face checks identify tablet orientation; a flip unit corrects it before drilling.
  • Locks position before firing: Rotary nests index tablets and hold position during laser drilling.
  • Verifies immediately: Post-drill camera inspection confirms hole presence/quality inline.
  • Closes the loop: Non-conforming or still-wrong-side tablets are routed to a reject chute automatically.

Patent page: CN2642449Y — Fully Automatic Laser Drilling Device for Two-Chamber Osmotic Tablets

System at a Glance

  1. Feeder drops tablets into dedicated nests on a rotary disk.
  2. Face check #1: Color/optical selector identifies the drug-layer side.
  3. If wrong: pass through the flip unit to correct orientation.
  4. Face check #2: Verify orientation again; if still wrong → reject path.
  5. Laser station: Controller indexes and pauses; CO2 laser drills the micro-hole.
  6. Vision QC: Camera validates that a correct hole is present.
  7. Sorting: Good tablets proceed; defects are diverted automatically.

Advantages You Can Defend

  • Assured single-side drilling: Eliminates the root cause of release failures.
  • Inline, objective verification: Camera QC detects missing/undersized holes in real time.
  • Simple, robust mechanics: Rotary indexing + standard sensors = stable uptime and easier maintenance.
  • Production-proven flow: Continuous operation with automated reject handling sustains yield and consistency.
  • Patent protection: The architecture and workflow are protected by CN2642449Y, forming the basis of HUANGHAI’s competitive moat.

Representative Production Results

In a representative long run with two-chamber osmotic tablets (100,000 tablets, 10-hour continuous operation), the system demonstrated:

  • Un-flipped tablets: ~0.5%
  • Nonconforming after vision check: ~2.5%
  • Acoustic environment: < 70 dB with stable mechanical balance

These figures illustrate robust orientation control, precise drilling, and effective inline verification for industrial scale.

Why HUANGHAI

  • Patented core: We build on CN2642449Y and a growing portfolio to protect key mechanisms and workflows.
  • End-to-end engineering: From design refinement to on-site commissioning and operator training, we support real production—not just lab demos.
  • Scalability in mind: The line layout, face control, and vision checks are designed for continuous, high-throughput environments.

Explore our current-generation system here:  Olando K3-2 Pharmaceutical Laser Drilling System

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