Plastic Injection Molding Facilities


Our KS facilities are designed to offer around the clock manufacturing with 3 locations to serve your needs:

KS Plastics

Tijuana, Mexico serves the consumer products and electronics, transportation, healthcare, and agriculture industries. The facility in Mexico offers our customers a near shore option for both large and small part plastic injection molding and assembly.

Tijuana facilities include:

  • 105,000 sq. ft. molding/assembly plant
  • 20 injection molding machines: 150-1800 tons
  • 4,500 sq. ft. tool room
  • Fully equipped quality lab
  • Class 7 and 8 clean room
  • *In process of certifying for ISO: 9001 *

San Leandro facilities include:

  • 100,000 sq. ft. molding/assembly plant
  • 33 injection molding machines: 55-1760 tons
  • 4,500 sq. ft. tool room
  • Fully equipped quality lab

Class 7 Cleanroom depicting medical device assembly im accordance to IS0 13485 standards

In addition to state-of-the-art equipment, tools and software, our Mexico facilities include:

  • 28 to 2000 ton presses with integrated robotics to facilitate automated manufacturing
  • Raw molds material moisture analyzers
  • Laser Marking
  • Ultrasonic welding
  • Pad printing machines
  • Solidworks, Mastercam, Moldflow Analysis
  • Optical and touch probe measuring equipment (CMM)
  • Custom automation and testing equipment

MOS Plastics

San Jose, CA serves the medical device, diagnostics, life science, and technology industries. MOS offers the most advanced injection molding facilities in Silicon Valley with a controlled, particulate-free molding manufacturing environment and medical molding in a class 10,000 (ISO class 7) clean room. The clean room facility is a closed-loop system appropriate for manufacturing Class IV medical devices, surgical instruments, drug delivery systems, components involving laboratory reagent, and diagnostic kits.

MOS facilities include:

  • 55,000 sq. ft. molding/assembly plant
  • 4,500 sq. ft. tool room
  • 30 injection molding machines: 28-500 tons
  • Fully equipped quality lab
  • 2 ISO Class 7 (10k) clean rooms


Blue plastic pellets


Plastic Injection Mold Materials

MOS and KS are experienced in working with the full spectrum of plastic resins, from the ordinary to the experimental. Our customers are constantly challenging us to push past convention and use new materials, or use conventional materials in new ways.

We work with traditional resins that include:

  • ABS
  • Acetyl
  • Acrylic
  • HDPE
  • HIPS
  • LDPE
  • Nylon
  • PBT
  • PC
  • PES
  • PP
  • PPS
  • TPP

Difficult-to-mold resins include:

  • COC
  • LCP
  • TPE




High-precision molding is our specialty, and our turnkey services enable our customers to get their products to market quickly, with confidence.

Let’s talk about your project