Plastic Injection Molding: Precision Thermoplastic Components at Scale
How CIC Specializes in Plastic Injection Molding Technology
At Custom Industrials Company (CIC), our plastic injection molding capabilities produce precision thermoplastic components with complex geometries, tight tolerances, and consistent mechanical properties across high-volume production runs. From initial tool design through ongoing part supply, CIC delivers complete injection molded component programs for industrial, medical, consumer, and specialty applications — combining engineering expertise, broad resin knowledge, and disciplined process control to ensure your molded parts perform reliably in service.
What Is Plastic Injection Molding?
Plastic Injection Molding is a precision manufacturing process that delivers:
- Thermoplastic resin melted and injected into precision steel molds
- Complex 3D part geometry achievable in single molding cycle
- Tight tolerances to ±.002″ on critical features
- High-volume production: thousands to millions of parts per year
- Broad resin selection for mechanical, thermal, and chemical requirements
- Insert molding for integrated metal-plastic assemblies
- Cycle times from seconds to minutes depending on part geometry and resin
Technical Capabilities & Specifications
Our plastic injection molding process delivers exceptional results:
- Press tonnage range: 50 ton to 500 ton
- Part size range: miniature components to 18″ x 18″ x 12″ maximum
- Tolerances: ±.005″ standard, ±.002″ on critical features
- Materials: full thermoplastic range including engineering and high-performance resins
- Shot size: up to 32 oz
- Mold cavitation: single cavity through multi-cavity family tools
- Secondary operations: degating, assembly, ultrasonic welding, pad printing
Industries Served with Plastic Injection Molding
- Industrial Equipment and Machinery Components
- Medical Device Housings and Disposables
- Consumer and Commercial Product Components
- Automotive Interior and Underhood Applications
- Electronic Enclosures, Bezels, and Connectors
- Agricultural and Food Processing Plastic Components
End Applications for Plastic Injection Molding
Our plastic injection molding components excel in applications requiring:
- Industrial equipment housings, covers, and guards
- Medical device enclosures, trays, and disposable components
- Consumer product housings and structural components
- Automotive plastic clips, trim, and underhood parts
- Electronic connector bodies, bezels, and cable management
- Food-safe plastic conveyor and handling components
Plastic Injection Molding FAQs
How does the injection molding process work?
Thermoplastic resin pellets are fed into a heated barrel where they melt and are injected under high pressure into a precision steel mold. The mold cools the part to its final shape in seconds to minutes, and the finished part is ejected. The cycle repeats continuously for high-volume production.
What engineering resins can CIC injection mold?
CIC molds the full range of thermoplastics including ABS, PC, Nylon 6 and 66, Polypropylene, Acetal (POM), PEEK, Ultem PEI, glass-filled grades, impact-modified grades, and flame-retardant formulations for industrial and electronic applications.
What is the process for developing a new injection molded part with CIC?
CIC follows a structured development process: DFM review of customer CAD, tool design and fabrication, first article inspection, process qualification, and production approval. CIC provides complete documentation at each stage so customers maintain full visibility and control.
Can CIC mold parts with metal inserts?
Yes. CIC's insert molding capability places metal inserts — threaded brass inserts, steel pins, terminals — in the mold before injection for superior mechanical fastening performance in the molded assembly.
What happens if a mold wears or needs modification?
CIC maintains customer tooling and can perform mold modifications, insert replacements, and tool refurbishment to maintain dimensional compliance over the production life of the program.
Design Advantages of Plastic Injection Molding
Plastic Injection Molding opens exceptional design possibilities:
- Complex 3D geometries achievable in single molding cycle
- Insert molding integrates metal fasteners and electrical contacts
- Overmolding adds soft-grip or multi-material surfaces
- Ribs, bosses, snap fits, and living hinges in as-molded form
- Elimination of secondary machining operations
- Consistent wall thickness for void-free molding
- Color and texture molded in — no painting required
Cost Benefits of Plastic Injection Molding
Achieve superior economics with plastic injection molding:
- Very low per-piece cost at production volumes
- Elimination of machining operations for complex shapes
- Multi-cavity tooling multiplies output per press cycle
- Long mold life amortizes tooling over millions of cycles
- Reduced scrap and regrind capability for material efficiency
- Assembly features molded in reduce downstream labor
- Competitive with metal where weight and corrosion resistance are required
Quality Assurance
Our commitment to quality ensures exceptional results:
- First article inspection with complete dimensional report
- Material certification for resin lot traceability
- Statistical process control with cavity pressure monitoring
- Visual and cosmetic inspection per customer AQL
- Functional testing for load and fit-critical features
- Complete quality documentation package
- Regulatory compliance documentation for medical and food-contact parts
Experience the CIC Difference
Partner with Custom Industrials Company for your plastic injection molding needs and benefit from:
- Full-service from tool design through long-term part supply
- Broad engineering resin expertise for demanding applications
- Insert molding and overmolding capabilities
- Rigorous DFM review to optimize part quality and cost
- Disciplined process control for consistent production quality
- Competitive tooling and piece-part pricing
- Responsive engineering support and customer service
Contact our technical team today at 314-567-5847, or email us at rfq@cic-cic.solutions for expert guidance on your requirements.