Laser Coding Machine

Laser Coding Machine – Introduction

A laser coding machine is a device that uses a high-energy laser beam to create marks on the surface of an object. Through thermal or photochemical effects, the laser causes discoloration, ablation, or melting on the material surface, producing permanent markings such as text, dates, batch numbers, barcodes, QR codes, or graphics. This equipment requires no inks, solvents, or consumables and operates as a non-contact marking method.

Working Principle:

A laser coding machine consists of a laser source, a scanning galvanometer, a focusing lens, and a control system. The control system generates the graphic or text information to be marked and directs the galvanometer to steer the laser beam. After passing through the focusing lens, the laser beam forms a high-energy-density spot on the workpiece surface. The spot scans point by point along a preset path, causing physical or chemical changes in the irradiated area and resulting in a clear mark.

Key Features:

• Permanent marking: Laser marks are created directly on or into the material surface and are not easily rubbed off or altered, offering good wear resistance.

• Low operating cost: No inks, solvents, thinners, or cleaning agents are required. There are minimal consumable costs under normal use (some models may require periodic laser source maintenance).

• Non-contact process: The laser beam does not physically contact the product, avoiding mechanical pressure or scratching on the product surface. Suitable for soft or delicate surfaces.

• Clean operation: No ink fumes or waste materials are generated, making the process relatively environmentally friendly.

• Fine marking capability: Capable of marking small text, high-density barcodes, and small QR codes with clear edges.

• Broad material compatibility: Can process metals, plastics, glass, ceramics, wood, paper, coated materials, and more.

Common Types (by laser source):

• Fiber laser coding machine: Suitable for metals and certain plastics. Offers relatively fast marking speed and long service life. Commonly used in electronics, automotive, hardware, and medical device industries.

• CO₂ laser coding machine: Suitable for paper, wood, glass, acrylic, certain plastics, and coated materials. Commonly used in food, beverage, and daily chemical packaging.

• UV laser coding machine: Shorter wavelength with a small heat-affected zone. Suitable for heat-sensitive materials (e.g., blister packs, flexible films, specialty plastics). Provides fine marking quality.

• Green laser coding machine: Suitable for highly reflective materials (e.g., gold, silver, copper) and internal engraving in glass.

Typical Applications:

• Food industry: production dates, expiration dates, batch numbers (on caps, packaging bags, cartons)

• Beverage industry: date codes on bottle bodies, caps, and can bottoms

• Pharmaceutical industry: markings on medicine cartons, foil blister packs, ampoules, and vials

• Daily chemical industry: batch numbers and expiration dates on cosmetic bottles and personal care product bottles

• Electronics industry: serial numbers and QR codes on PCBs, chips, connectors, and housings

• Hardware and automotive: permanent markings on components, tools, and nameplates