Top 10 Plastic Injection Molding Companies in Thailand

Thailand has emerged as a major manufacturing hub in Southeast Asia, with plastics and plastic products being one of the country’s top exports. This rapid growth has led to hundreds of plastic injection molding companies sprouting up to meet demand.

But not all companies are created equal. Some provide superior quality, faster turnarounds, and better value overall.

So as a professional plastic injection molding manufacturer, I decided to dig into the Thai plastic molding scene and uncover the true top players when it comes to injection molding services. After extensive research, I narrowed it down to 10 companies that consistently come out on top.

How I Evaluated the Top Injection Molding Companies

Choosing the leading injection molding companies in any country is tricky. There are dozens of factors to weigh like years in business, capacity, certifications, specializations, clientele and more.

So I developed a consistent framework to grade each company on 5 core criteria:

• Quality: Strict quality control and top certifications like ISO 9001
• Capacity: Annual output, maximum mold sizes and number of machines
• Expertise: Specialized industry knowledge and engineering capabilities
• Reliability: On time delivery track record and supply chain robustness
• Value: Competitive pricing and overall customer satisfaction

I also checked for consistency and commitment across these areas over decades, not just a recent flash in the pan. Leveraging this methodology, the top Thai injection molding companies clearly rose to the top.

Now let’s dive into the list!

Top 10 Plastic Injection Molding Companies in Thailand

1. Thai Mitsuwa

Thai Mitsuwa launched back in 1988 with just 6 injection molding machines. But fast forward to today the company now operates 140 machines alongside 1,800 employees out of their factory in Pathumthani, Thailand.

But it’s not just their longevity and capacity that makes Thai Mitsuwa a leading plastic injection molder. They also have ISO 9001 certification and boast an impressive client list including Honda, Daikin, Canon and Panasonic.

Thai Mitsuwa works with everything from normal injection to specialized heat and dual color molding. And they offer integrated services spanning design, mold fabrication, secondary processing and final assembly.

Bottom line? Thai Mitsuwa is the full package – a veteran Thai molder offering quality, capacity and reliability all under one roof.

Location: Pathumthani, Thailand
Services: Injection molding, design, fabrication & assembly
Certifications: ISO 9001

2. TTS Plastics

TTS Plastics has roots extending back to Taiwan, where they specialized in manufacturing molds initially. But in 1993 leadership relocated the injection molding production facilities to Thailand.

Today TTS Plastics runs 84 machines out of Chacheongsao province. And they further expanded with a plastic products company called T&K in 2002 as well to provide integrated manufacturing.

Like Thai Mitsuwa, TTS Plastics boasts complete in-house servicing. This covers mold design, tooling, plastic injection, secondary processing like pad printing and ultrasonics, plus testing and assembly work.

Their impressive list of certifications include ISO 9001 and IATF 16949 standards in quality, plus ISO 14001 for environmental management. Major automotive, appliance and electronics brands count on TTS for quality and reliability.

Location: Chacheongsao, Thailand
Services: Design, tooling, injection molding & testing
Certifications: ISO 9001, IATF 16949, ISO 14001

3. Malaplast

Sometimes the companies with the most history bring the greatest expertise. Malaplast first opened its doors in 1957, starting injection molding services in 1971 to produce melamine tableware through thermoset molding.

Today they offer diverse plastic molding including thermoplastic and blow molding as well. And Malaplast’s melamine production quality is second to none – the company even pioneered melamine molding processes in the country.

Malaplast currently holds ISO 9001 certification and produces over 6,000 metric tons of quality plastic goods per year. They export products worldwide and specialize in tableware plus household items.

Location: Samutprakarn, Thailand
Services: Injection molding, blow molding, melamine molding
Certifications: ISO 9001

4. Molder Enterprise

Molder Enterprise is a bit unique on this list given their exclusive focus on tooling and mold fabrication – they do not handle secondary production processes or assembly.

But their 20+ years perfecting precision tool and die sets them apart when it comes to quality molds and plastic injection. Molder possesses complete in-house tooling capabilities like CNC machining, EDM and part polishing.

They create both plastic and metal molds for technologies like plastic injection, blow molding, rubber molding and die casting. Diverse certification includes ISO 9001 along with ISO/TS 16949 automotive standards.

Whether you need rapid prototyping done or full-scale production molds for 500,000+ cycles, Molder Enterprise has the proven capacity and expertise.

Location: Samutsakorn, Thailand
Services: Tooling & die fabrication, mold creation
Certifications: ISO 9001, IATF 16949

5. ALCAMI

ALCAMI is an end-to-end design, tooling and injection molding firm located northeast of Bangkok in Rayong, Thailand. The company was founded in Italy but later expanded operations into Thailand to be closer to prominent Southeast Asia manufacturers.

Unlike mega factories pumping out millions of identical plastic widgets, ALCAMI offers specialized expertise and quality when lower volumes are required. They even house Class 100,000 clean rooms for medical device customers needing strictly controlled environments.

But they can still run production or prototype jobs with up to 16 injection machines ranging from 55 to 700 US tons of clamp force. ALCAMI likewise supports multi-shot and overmolding needs for complex plastic parts.

Location: Rayong, Thailand
Services: Prototyping, production molding, metrology
Certifications: ISO 13485

6. Thai Nissin

While Thai Nissin opened its doors in Thailand back in 1995, they actually have Japanese roots like several other leading Thai molding companies. Today Thai Nissin employs over 200 staff across two factories located in Ayutthaya and Chonburi.

One major area that sets Thai Nissin apart is their early adoption and specialization around mold flow analysis. This simulation and modeling accurately predicts plastic melt behaviour as its injected, drastically reducing guesswork and prototyping to deliver quality.

Mold flow also prevents manufacturing defects and optimizes the process. Some notable customers that benefit from Thai Nissin’s accurate tooling and strict process controls include Toyota, Sony, HP, Canon, BMW and Ford.

Location: Ayutthaya, Thailand
Services: Injection molding, mold design
Certifications: IATF 16949

7. Roong Thavorn Plastics

Roong Thavorn came into the plastic manufacturing scene much earlier than most, launching way back in 1992. In the three decades since they have grown to house over 700 staff across a large factory campus located in Bangkok.

The company offers tooling like CNC machining along with secondary processing such as pad printing, ultrasonic welding, precision drilling and custom paint jobs. Roong Thavorn likewise supports insert molding if needed.

This combination of high-quality process execution and integrated finishes helps explain their impressive client roster, including major auto manufacturers and multinationals like Caltex, PTT and Toyota.

Location: Bangkok, Thailand
Services: Mold fabrication, injection molding, finishing
Certifications: ISO 9001

8. SRITHAI Moulds

Srithai Moulds mirrors the long history of precision plastic mold making you commonly find across top Thai injection molding companies. They first launched operations in 1990 and have since fabricated over 2,700 precision tooling sets for local and international clients.

The company employs high-end design software coupled with demanding measurement and machining protocols to repeatedly deliver tight-tolerance, durable molds suited to high duty cycle production or fast prototype runs.

And supporting their exacting quality standards, Srithai secured both ISO 9001 along with ISO 13485 industry certifications related to stringent medical devices and equipment production.

Location: Chonburi, Thailand
Services: Injection molds, mold design
Certifications: ISO 9001, ISO 13485

9. Jet Industries

Jet Industries is part of a larger Taiwanese manufacturing group that first set up production facilities in Thailand during the 1980s. Since then Jet grew to over 1,200 staff across six factories, specializing in high-quality mold builds.

The team leverages demanding machining and measurement equipment like CNC mills, electrical discharge machining (EDM), coordinate measuring machines (CMMs) and laser welding rigs.

These cutting-edge tools help Jet deliver consistent mold fabrication aligned to their ISO 9001 quality certification. And major electronics, automotive and appliance makers now trust Jet to deliver durable, precise injection molds suited for high duty cycle work.

Location: Samut Sakhon, Thailand
Services: Mold fabrication & machining
Certifications: ISO 9001

10. Poly-Tech

The last entry on our list takes a lot of companies by surprise given this Thai mold shop was only founded in 2014. But the young company makes up for their age with industry veterans at the helm and major investments into advanced technology.

Case in point – Poly-Tech operates a full stable of state-of-the-art machining equipment from leading brands that includes HAAS, FANUC and Mitshubishi Electric. This potent mix enables tight tolerance tools fabricated per German VDI 3400 quality benchmarks.

They likewise pursue creative solutions, whether a customer requires specialized PA 12 inserts able to withstand 80°C heat or glass filler-enhanced tool rigidity. Between bandwidth and drive, watch for Poly-Tech to climb market share over the coming decade.

Location: Samutprakarn, Thailand
Services: Mold design & fabrication
Certifications: ISO 9001

Baiwe Molding

Baiwe Molding is a top Chinese plastic injection molding manufacturer with over 15 years of experience. Our factory can meet all your needs. Our factory passed the BSCI audit, and our silicone rubber products have been approved by the FDA, SGS, and LFGB. You can trust us to supply your plastic molded products.

As one of the best custom plastic injection molding manufacturers, we focus on improving our production craft with equipment like 3D printers, CNC machines, and other molding equipment. This ensures we can meet your high standards for plastic injection molding projects.

Sea Change from Metal to Plastics

Thailand has leveraged their strategic location and motivated workforce to become a major regional export hub. Injection molding proved essential to manufacturer growth by enabling precise, affordable plastic parts production to replace costly CNC machined metal components across industries.

And leading companies continue pushing the envelope, adopting advanced techniques like hot runner systems for specialized injection molding needs or simulation to assess cooling channel placement.

Global trends point to polymers playing an ever greater role thanks to enabling technologies and material improvements. But with the rise of innovations like nanoclay additions and carbon fiber reinforcement boosting strength, expect Thailand’s injection molding leadership to continue driving the industry forward throughout 2025 and beyond.