High-Volume Plastic Injection Molding, Engineered and Assembled

Custom Industrials Company (CIC) delivers complete high-volume plastic injection molding programs — from DFM review and tool design through molding, secondary operations, assembly, and long-term part supply. For automotive, industrial, electrical, and consumer programs that run from thousands to millions of parts a year, CIC combines broad engineering-resin expertise with disciplined process control. And because CIC sources both molded plastics and metal components, you can consolidate plastic and metal parts — and metal-to-plastic assemblies — with a single partner.

Full-Service Molding at Production Volume

Injection molding melts thermoplastic resin and injects it under high pressure into a precision steel mold, forming complex 3D geometries in a single cycle. At production volume, multi-cavity tooling multiplies output per cycle and across millions of parts, driving a very low per-piece cost. CIC runs this process as a managed program: tool design, qualification, molding, secondary operations, assembly, and ongoing supply.

Technical Capabilities

Press tonnage range: 50 to 1500 tons
Part size: miniature components up to 24″ x 24” x 12″
Tolerances: ±.005″ standard, ±.002″ on critical features
Shot size: up to 272 oz
Tooling: in-house mold and tool making — single-cavity through multi-cavity family tools designed, built, and maintained in-house.
Resins: ABS, PC, Nylon 6/66, polypropylene, acetal (POM), PEEK, Ultem PEI, glass-filled, impact-modified, and flame-retardant grades
Secondary operations: degating, assembly, ultrasonic welding, pad printing
Insert molding and overmolding for integrated metal-plastic and multi-material parts

Markets & Applications

Automotive: interior and underhood components, clips, trim, cable management
Industrial equipment: housings, covers, guards, and structural components
Electrical & electronic: connector bodies, bezels, enclosures
Material-handling & dunnage: trays, containers, and protective shipping components, including multi-material assemblies
Consumer & commercial product housings and structural parts

The CIC Advantage: Plastic and Metal From One Partner

Most molders give you molded plastic and stop there. CIC’s differentiator is consolidation: the same partner that molds your plastic components also supplies stampings, deep-drawn parts, machined parts, castings, and forgings — and integrates them through insert molding, overmolding, and assembly. That means fewer vendors, one engineering point of contact, and a genuine make-vs-make conversation about whether a given part is best in plastic, metal, or a hybrid.

Capability	Detail
Tonnage	50–1500 tons
Tolerance	±.005″ standard, ±.002″ critical
Tooling	In-house mold and tool making; single- through multi-cavity family tools.
Resins	Commodity through high-performance (PEEK, Ultem)
Insert / overmolding	Metal-plastic and multi-material parts
Assembly	Ultrasonic welding, pad printing, full assembly
Single-source	Plastic + metal components from one partner

Why CIC for High-Volume Molding

Rigorous DFM review to optimize part quality, moldability, and cost before tooling is cut
In-house mold and tool making for faster tool builds, engineering changes, and repairs across the life of the program.
Broad engineering-resin expertise for demanding mechanical, thermal, and chemical requirements
Insert molding and overmolding for integrated assemblies
Full-service program management: tooling, molding, secondary ops, assembly, and long-term supply
Single-source plastic and metal components and assemblies
U.S.-based engineering and sourcing from St. Louis, Missouri

Frequently Asked Questions

What volumes is CIC's injection molding suited for?

CIC's injection molding is built for high-volume production — thousands to millions of parts per year — using multi-cavity tooling to drive very low per-piece cost, while also supporting lower-volume engineering programs.

What resins can CIC mold?

The full thermoplastic range: ABS, PC, Nylon 6 and 66, polypropylene, acetal (POM), PEEK, Ultem PEI, plus glass-filled, impact-modified, and flame-retardant grades for industrial, automotive, and electronic applications.

Can CIC mold metal inserts into plastic parts?

Yes. CIC's insert molding places threaded brass inserts, steel pins, and terminals into the mold before injection for strong, integrated metal-plastic assemblies, and overmolding adds soft-grip or multi-material surfaces.

Does CIC do assembly, not just molding?

Yes. CIC manages secondary operations and assembly — degating, ultrasonic welding, pad printing, and multi-part assembly — to deliver finished, line-ready components.

Can I source plastic and metal parts from CIC together?

Yes, and that is CIC's core advantage. The same partner supplies molded plastics, stampings, deep-drawn parts, machined parts, castings, and forgings, and integrates them through insert molding and assembly — consolidating vendors and engineering oversight.

Does CIC build and maintain molds in-house?

Yes. CIC's tooling capability includes in-house mold and tool making — single-cavity through multi-cavity family tools are designed, built, and maintained in-house, which shortens tool builds, speeds engineering changes, and protects production uptime over the life of the program.

Send your molded-part print, resin, and annual volume to CIC for a DFM review and production quote — and ask about consolidating your plastic and metal components. Call 314-567-5847 or email rfq@cic-cic.solutions.