Laser Engraving: High-Precision Permanent Marking

Laser engraving has become one of the most popular methods for adding logos, serial numbers, QR codes, and traceability information to injection molded plastic parts. Unlike embossed or debossed logos, laser engraving is performed after molding using a focused laser beam that removes or alters the surface of the plastic.

Laser engraving is especially suitable for products requiring variable information, such as serial numbers, production dates, barcodes, or individualized branding.

Advantages of Laser Engraving

• Permanent and wear-resistant
• High precision for small text
• No mold modification required
• Supports serial numbers and QR codes
• Suitable for automated production

Limitations

• Requires laser-compatible materials
• Additional processing step after molding
• Higher production cost than molded logos

Laser Engraving Applications

Pad Printing and Screen Printing

When colorful logos or detailed graphics are required, printing remains an economical solution.

Pad Printing

Pad printing transfers ink from an etched plate to the product using a silicone pad.

It is ideal for:

• Curved surfaces
• Small logos
• Multi-color graphics
• สินค้าอิเล็กทรอนิกส์สำหรับผู้บริโภค

Screen Printing

Screen printing is commonly used for flat plastic components with larger logos or symbols.

ผลิตภัณฑ์ทั่วไปประกอบด้วย:

• แผงควบคุมเครื่องใช้ไฟฟ้า
• Electrical enclosures
• Instrument panels
• Industrial equipment

Printing Method Comparison

In-Mold Labeling (IML)

In-Mold Labeling (IML) integrates a pre-printed decorative film directly into the injection molding process. During molding, the label bonds permanently with the molten plastic, producing a highly durable decorative surface.

Unlike conventional printing, IML provides:

• ความต้านทานต่อรอยขีดข่วน
• ความต้านทานต่อสารเคมี
• ทนต่อรังสี UV
• รูปลักษณ์ระดับพรีเมียม
• Full-color graphics

IML is commonly used in premium consumer products, home appliances, packaging, and automotive interiors.

IML Advantages

Surface Texture and Logo Visibility

Surface texture plays an important role in how a molded logo is perceived.

For textured products, the logo must be designed together with the mold texture to maintain readability.

Common Mold Textures

A practical recommendation is to keep logos polished while applying texture to the surrounding surface. This creates a natural contrast and improves visual recognition.

Best Practices for Logo Placement

Logo placement affects not only aesthetics but also moldability and production consistency.

Recommended Locations

• Large flat surfaces
• Cosmetic exterior faces
• Areas away from gates
• Areas free from ejector pin marks
• Regions with uniform wall thickness

Avoid

• Weld line locations
• Parting lines
• Thin ribs
• Deep recesses
• Areas near sliders or lifters

Proper placement minimizes cosmetic defects while maintaining clear brand visibility.

Placement Checklist

Manufacturing Workflow for Molded Logos

At Samgo, logo production follows a standardized engineering process to ensure accuracy and repeatability.

ขั้นตอนการทำงานทั่วไป

1. Customer provides AI, DXF, or STEP logo files.
2. Engineering team performs DFM review.
3. Logo geometry is optimized.
4. Mold insert is machined using CNC or EDM.
5. Mold surface is polished or textured.
6. T1 mold trial is completed.
7. Sample approval.
8. Mass production begins.

This workflow minimizes tooling modifications and ensures consistent logo quality across production batches.

Logo Quality Inspection

Even a well-designed logo requires quality verification before mass production.

Inspection Items

For high-end consumer products, logo appearance is often inspected under standardized lighting conditions to ensure consistency.

ทำไมต้องเลือก Samgo

Creating a professional molded logo requires more than engraving text into steel. It demands a thorough understanding of mold design, plastic flow, machining precision, and product aesthetics.

At Samgo, we provide complete engineering support to ensure every logo is both visually attractive and easy to manufacture.

ความสามารถของเรา

Whether you need a subtle debossed logo for industrial equipment or a premium embossed logo for consumer electronics, our engineering team can recommend the most suitable solution for your application.

คำถามที่พบบ่อย

Which logo type is best for injection molded plastic parts?

Embossed and debossed logos are the most durable because they are integrated directly into the molded part and require no secondary processing.

What is the recommended height for an embossed logo?

For most applications, a height of 0.2–0.5 mm with a 3–5° draft angle provides a good balance between visibility and manufacturability.

Can very small text be molded?

Yes, but lettering should generally be at least 1.5 mm high with a minimum stroke width of 0.25 mm to ensure consistent mold machining and plastic filling.

Which logo method is best for outdoor products?

Embossed or debossed molded logos are recommended because they provide excellent UV resistance, weather resistance, and long-term durability without peeling or fading.

บทสรุป

Choosing the right logo manufacturing method is an important part of plastic product design. From embossed and debossed logos to laser engraving, pad printing, and in-mold labeling, each technique offers unique advantages depending on the product’s function, appearance requirements, and production volume.

By considering factors such as draft angle, logo size, surface texture, placement, and machining precision during the design stage, manufacturers can create logos that not only strengthen brand identity but also improve manufacturability and long-term durability.

At Samgo, we integrate logo engineering into every stage of product development—from DFM analysis and mold design to precision machining and mass production—helping customers achieve high-quality, professional branding on every injection molded component.