American Society for QualityASTMSAE
Stern Companies | Your single source for polymer componetsStern Companies specializes in Custom Plastic and Rubber Molding and Assemblies

Quality Injection Molding Services

Quality Injection Molding Services

Stern Companies provides quality injection molding services for customers that are looking for small or large parts in either simple to complex geometric shapes.  We are dedicated in finding the right molder for your project.  We partner with manufacturers who use the latest technologies to produce parts, monitor quality and ensure repeatability.  We are happy to work on projects from low volume batches to the multi millions of components.

Stern Companies recognizes the importance to our customers to optimize the functionality of their components while achieving and maintaining lower production costs.  We provide the expertise, experience and care with the identification and selection of the most effective material, a key factor in realizing higher performance and maximum cost efficiency.  We utilize a wide range of plastic materials, such as PEEK, PVC, Polyethylene’s, Polypropylene’s, Nylon’s, ABS, Acetal, Styrene, TPE.

Whether you’re starting a new plastic molding project or need us to take over a job in progress, Stern Companies can meet the most demanding specifications and performance requirements in molding plastic.

At Stern Companies, we take quality seriously.  We are ISO / ASQ Certified and meet SAE / ASTM Standards.  Stern has the capacity to handle your project, large or small.

For more information on our quality injection molding services, see the table below or contact us directly.

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Past Projects

Custom Injection Molding Capabilities

Process Components
Screw
Barrel
Channels
Cavities
Hot Mold
Vulcanization
Pressure
Temperature
Time
Crosslinking
Molding Process
Thermoplastic Molding
Thermoset Molding
Insert Molding
Two-Shot Molding
Thermoplastic Molding Scientific Decoupled Molding
Precision Tolerances
All Molds Include Cavity Pressure Transducers
Round-the-Clock Tooling Maintenance
Polymer Lab for Incoming & Molded Product Material Analysis
Metal-to-Plastic Conversions
Thermoset Molding Injection Molding & Injection/Compression Molding
Cold Manifold Technology
Closed Loop Machines with Temperature Controlled Platens
Post Bake Capability
Fully Automated Stuffers for Bulk Molding Compound
Metal-to-Plastic Conversions
Various Deflashing Options Including:
  • In-line Track Blasting
  • Bulk Wheelabrating
  • Turbula Machine (for small, delicate parts)
Insert Molding Robotic Insert Placement
Optical, Vision & Vacuum Insert Detection Systems
In-line Continuity Testing
Reel-to-Reel Capability
Solder Bond & Resistive Welding
Solderability Verification of Pre- and Post-Molded Inserts
Pre- and Post-Mold Forming of Inserts
Rotary Molding Machines
Experience in Lead Frame Molding for Wire Bonding Applications
Two-Shot Molding Multiple Molding Options:
  • Rotating Platen
  • Rotating Stripper Plate
  • Robotic Transfer
  • Transfer Overmolding
Rigid-to-Rigid Expertise
Rigid-to-Elastomer Expertise
Material Selection to Provide a Chemical Bond Between Resins
Experience in Back Lighting Applications
Scientific Molding Techniques Simulation Software
Decoupled Molding
Computer Aided Manufacturing
Rubber Materials
Synthetic Rubbers (Elastomers)
Thermoset Elastomer (TSE)
Natural Rubber
SBR
Butyl
EPDM
Neoprene
Nitrile
Polyurethane
Silicone
Acrylic
Epichlorohydrin
Fluoroelastomer
Plastic Materials
Engineering Grade
Nylon
Acetal
ABS
PP
PE
PPO
Polyester
PVC
PC
Acrylic
PEEK
LCP
Granular
BMC
Press Size 33 to 3300 ton
Shrinkage Allowance 2 to 4 %
Tolerance Rubber Molders Association (RMA)
Standard
Precision
Additional Services
Deflashing
Final Inspection
Engineering
Assembly
Hot Plate Welding
Packaging
Rubber to Metal Bonding
Production Volume Prototype to Production
Typical Lead Time 2 to 3 weeks (Standard)
16 to 20 weeks (Tooling)

Additional Information

Industry Focus
Recreational Vehicles
Sporting Equipment
Industrial Waterworks
Medical
Food Packaging
Agricultural
Firearms
Intended Applications
Fuel Tank
Seat Support
ATV Rear Fender
Shock Absorber Boot
Air Duct
Snowmobile Skis
ATV Box
Industry Standards
ISO Compliant
Society of Automotive Engineers (SAE)
American Society for Testing and Materials (ASTM)
Food and Drug Administration (FDA)
Efficiency
Lean Manufacturing
Six Sigma Certification
Certified Quality Engineer (CQE)
Lights Out Manufacturing
File Formats Pro/Engineer 3D

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