Secondary Assembly & Finishing in Malaysia
Secondary assembly and finishing covers everything done to a moulded part after it leaves the press — spray painting, chrome plating, laser etching, silk screen and tampo printing, ultrasonic welding, post-mould insert installation, sub-assembly and retail packing. Ichiplas performs these in-house in Johor Bahru, Malaysia, so parts ship assembly-ready under one ISO 9001:2015 quality system.
Capability at a glance
- Finishing
- Spray painting, chrome plating, laser etching, silk screen and tampo (pad) printing
- Joining
- Ultrasonic welding, heat staking, post-mould insert installation, mechanical assembly
- Colour matching
- Pantone and RAL
- Quality certification
- ISO 9001:2015
The Ichiplas Advantage
Finishing & Assembly Processes
Spray Painting
Consistency and Protection:
- Application of a single, uniform color to plastic parts
- Provides an additional layer of protection
- Suitable for a wide range of part geometries and surface finishes
Tampo Printing
High-Precision Customisability:
- Printing of intricate 2D designs onto 3D plastic parts
- Suitable for parts with complex shapes and textures
- Excels at reproducing detailed graphics and logos
Silk Screen Printing
Large-Scale Efficiency:
- Cost-effective way to apply graphic designs
- Suitable for parts with flat or simple geometries
- Can accommodate a wider print area compared to tampo printing
Chrome Plating
Decorative Metal Finish:
- Electroplated bright or satin chrome on moulded plastic parts
- Substrate must be plating grade — typically ABS or PC/ABS
- Used for trim, fascias, badges and premium consumer surfaces
Laser Etching
Permanent, Ink-Free Marking:
- Serial numbers, date codes, logos and regulatory text
- No ink to wear off, and no consumables per part
- Can ablate paint for backlit keypads and day/night buttons
Post-Mould Insert Installation
Threads Added After Moulding:
- Heat-set and ultrasonic brass inserts fitted after the part is moulded
- Useful where insert moulding is not viable or volumes are low
- Gives a reusable metal thread in a plastic boss
Other Finishing Examples
Ultrasonic Welding
Ultrasonic welding is a specialized secondary process that Ichiplas utilizes to seamlessly join plastic components, creating high-quality, durable assemblies.
Ultrasonic welding uses vibration-induced heat to fuse two plastic parts together, resulting in a strong, visually appealing bond without the need for additional fasteners or adhesives. Key benefits include:
- Fast, high-throughput process
- Relatively safe indirect heating method
- Ability to weld parts made of different materials
- Produces a near-invisible, high-quality seam
End-to-End Manufacturing
Secondary Assembly
Comprehensive in-house secondary assembly services to bring your plastic parts to their final, completed state.
- Assembly and sub-assembly of plastic components
- Identification and correction of manufacturing defects
- Integration of non-plastic parts (e.g., electronics, hardware)
- Additional finishing services performed as required
Frequently Asked Questions
- What finishing processes do you offer for injection molded parts?
- We offer spray painting (single and multi-colour), chrome plating (electroplated bright or satin chrome on plating-grade ABS and PC/ABS), laser etching for permanent serial numbers and date codes, post-mould installation of heat-set and ultrasonic threaded inserts, tampo printing (pad printing for logos and detailed graphics on 3D surfaces), silk screen printing (cost-effective for flat or slightly curved surfaces), and texture finishes applied during molding via mold surface treatment.
- What is tampo printing and when should I use it?
- Tampo (pad) printing transfers ink from an etched plate onto a 3D surface using a silicone pad. It's ideal for printing logos, text, or detailed graphics onto curved, recessed, or textured plastic surfaces where screen printing can't reach. Common applications include control panel markings, product branding, and regulatory text on consumer electronics and medical devices.
- Do you offer full assembly services — not just individual parts?
- Yes. Ichiplas provides complete sub-assembly and final assembly services, including ultrasonic welding, adhesive bonding, mechanical fastening, cable/wire integration, functional testing, and retail packaging. This one-stop approach eliminates the need to ship parts between multiple vendors, reducing lead time, logistics cost, and quality risk.
- Can you match specific Pantone or RAL colours for spray painting?
- Yes. We colour-match to Pantone, RAL, or custom colour specifications. Our spray painting process includes colour development, sample approval, and documented colour control throughout production. For critical cosmetic applications, we recommend providing a physical colour standard (colour chip or approved sample) for reference.
- What is ultrasonic welding and when is it used?
- Ultrasonic welding uses high-frequency vibrations to create a molecular bond between two plastic parts without adhesives or fasteners. It produces a strong, clean, hermetic seal and is commonly used for enclosures that need to be sealed (waterproofing, dust-proofing), medical device housings, and consumer electronics casings. The process is fast and highly repeatable.
Project Examples
Our showcase exemplifies the consistent excellence that defines Ichiplas. From the smallest parts to complex assemblies, we maintain the same high standards across all our products, ensuring you receive nothing short of the best, every single time.
Overmolded Electronics Casing
A highly complex double overmolded casing.
Process: Double overmolding process and insert molding with magnet
Materials: PA66 with TPU
Dimensions: Outer diameter: 20cm, Height: 18cm
Applications: Electronics casing and assembly
Advantages: Fire-rated for integrated charging, magnetic quick-release capability
Key Features:
- Complex multi-material cosmetic design
- Integrated magnet for secure fitting
Get Free Quote
Contact us today to learn more about our services and how we can help you with your next project.