Muto Vietnam's high-quality printing process integrated with painting and molding

Technology & Services

Muto Vietnam's High-Quality Printing Process Integrated with Painting and Molding
■Strengths of Muto Vietnam's Printing Process
Strength ①: Achieving High Quality through "In-House Collaboration" with Painting and Molding
Many printing defects are actually caused by the preceding processes (molding and painting).
At Muto Vietnam,
Mold → Molding → Painting → Printing → Assembly
As all these processes are located within the factory, printing can be performed under optimal conditions from the preceding stages.
Examples:
• Uneven adhesion on painted surfaces → Adjust painting conditions on the spot
• Gate marks or sink marks → Molding department makes immediate corrections
• Ink incompatible with the material → Share material information and optimize
A distinctive feature is the "print quality unique to an integrated factory," which is unparalleled by other companies.
Strength ②: Supports Diverse Printing Methods (Selecting the Optimal Method for Each Product)
Muto Vietnam supports the following printing methods:
● Pad Printing
• Excels in curved surface printing
• Ideal for smartphone components, automotive switches, and home appliance control panels
• High reproducibility for fine characters and thin lines
● Screen Printing
• Excels in printing flat parts and large areas
• Can achieve thick film, resulting in high durability
• Used for large home appliance exteriors, indicator printing, etc.
● Inkjet Printing (for Small-Batch, High-Mix Production)
• High precision with digital control
• No plate required = Cost advantage even for small lots
Strength ③: Japanese Quality Color Reproducibility, Adhesion, and Durability
• Color difference management (ΔE color difference measurement)
• Film thickness measurement and coating amount management
• Ink adhesion tests (cross-cut, peel test)
• Abrasion tests, chemical resistance tests
By quantitatively managing these,
we can meet high-quality requirements for the Japanese market.
Strength ④: One-Stop Service up to Laser Processing and Assembly
As post-printing processes,
• Laser engraving
• UV curing
• Assembly
• Inspection
we can provide integrated support up to these stages,
thereby minimizing peeling, chipping, and misalignment after printing.
Strength ⑤: High Quality Stability During Mass Production
• Printing plate management (plate lifespan, measures against expansion and deformation)
• Ink viscosity management
• Temperature and humidity control
• Jig precision management
• Standardized visual inspection system
Print quality remains stable with minimal fluctuations even during long-term mass production.
________________________________________
■ Common Printing Process Challenges ⇒ Solutions by Muto Vietnam
Challenge ①: Frequent Blurring or Bleeding in Printing
→ Trace the cause back to the preceding processes for fundamental improvement
• Improvement of painted surface roughness
• Ink viscosity management
• Review of pressure and plate separation
• Optimization of molded part shape (measures against warping and distortion)
Challenge ②: Printing Peels Off or Has Poor Abrasion Resistance
→ Thorough adhesion tests and ink compatibility confirmation
• Adhesion tests not relying solely on visual inspection
• Optimization of UV curing conditions
• Consideration of contact stress from painting → printing → assembly
Challenge ③: Batch-to-Batch Variations in Color or Positional Accuracy
→ Long-term stabilization through quantitative management + jig management
• Color difference management
• Improvement of positioning jig precision
• Temperature and humidity control
• Continuous recording of ink viscosity
Challenge ④: Difficulty in Printing on Curved Surfaces and Fine Shapes
→ Achieving high reproducibility through pad printing technology + optimization of plate making
• Selection of pads with high conformity to curved surfaces
• Management of plate etching precision
• Pressure program settings tailored to the shape
Challenge ⑤: Concerns about Quality Control in Overseas Production
→ Peace of mind with Japanese standard quality control + Japanese language support
• Compliance with quality standards for the Japanese market
• Quality reports in Japanese
• Standardized format for quality data
• Immediate submission of improvement reports in case of defects
________________________________________
■Reasons for Choosing Muto Vietnam's Printing Process
・ Quality design, including preceding processes, is possible within the same factory as molding and painting.
・ Diverse printing technologies compatible with curved surfaces and fine parts
・ Japanese quality color difference, film thickness, and adhesion management
・ Quality can be maintained through integrated production up to laser processing and assembly.
・ High reliability with few quality fluctuations during mass production.
・ Maintains Japanese quality despite being overseas production.