Top Injection Molding Companies in Indiana

Indiana is an important manufacturing destination for businesses seeking custom plastic components, precision-molded parts, and engineered polymer products. The state's manufacturing ecosystem supports industries such as automotive, medical devices, electronics, industrial equipment, consumer products, and packaging. Companies searching for top injection molding companies in Indiana can explore suppliers offering custom injection molding, micro molding, silicone molding, tooling, product development, and production assembly.

Plastic injection molding involves injecting molten material into a mold to produce components with defined shapes and dimensions. It is widely used for manufacturing repeatable parts at scale, while specialized molding techniques support intricate designs, miniature components, and products made from advanced materials.

Top 10 Injection Molding Companies in Indiana

1. Makuta

Makuta specializes in precision micro injection molding and micro mold tooling at its facility in Shelbyville, Indiana. The company produces miniature plastic components that require complex geometries, tight dimensional tolerances, and consistent manufacturing quality. Its capabilities support demanding applications in medical devices, pharmaceuticals, microfluidics, electronics, and automotive products.

Services Offered

• Precision micro injection molding
• Two-shot molding and over molding
• Micro mold design and tooling
• High-temperature plastic molding
• Prototype development
• Cleanroom manufacturing and automated inspection

Makuta is a strong option for OEMs and product developers seeking miniature plastic components for technically demanding applications. Its precision molding capabilities are particularly relevant when conventional molding processes may not provide the required accuracy.

2. Plas-Tech Molding & Design, Inc.

Plas-Tech Molding & Design, Inc. is included in this list for businesses researching custom plastic molding and product development services. Buyers should confirm the company's exact legal name, Indiana facility, and current capabilities before requesting a quotation, as similarly named molding businesses operate in the wider plastics industry.

Services to Verify

• Custom plastic injection molding
• Mold design and tooling support
• Prototype and component development
• Precision plastic part manufacturing
• Secondary finishing and assembly
• Quality inspection and production support

For businesses sourcing custom molded parts, confirming the available molding equipment, supported materials, production volumes, and tooling arrangements is essential before beginning a project.

3. PTG Silicones, Inc.

PTG Silicones, Inc. is based in New Albany, Indiana, and specializes in liquid silicone rubber molding and thermoplastic components with silicone over molding. Its manufacturing capabilities support products that require flexibility, sealing performance, durability, and precise material integration. The company serves markets including healthcare, food packaging, transportation, industrial equipment, electronics, and consumer products.

Services Offered

• Liquid silicone rubber (LSR) molding
• Thermoplastic injection molding with silicone over molding
• Custom silicone material development
• Prototype-to-production tooling
• Secondary operations and assembly
• Process validation and automated manufacturing

PTG Silicones is particularly relevant to businesses requiring custom silicone components, seals, gaskets, and integrated plastic-silicone products. Buyers should discuss material compatibility, dimensional requirements, and applicable industry standards when evaluating the company for a project.

4. IQ Enterprises

IQ Enterprises is included among the companies to investigate for plastic injection molding and manufacturing-related services. Before engaging the business, buyers should verify its current Indiana operations and confirm that its manufacturing capabilities match their project requirements.

Services to Verify

• Plastic injection molding
• Product design and engineering
• Molded component development
• Tooling and production support
• Prototype manufacturing
• Quality inspection and finishing

Businesses considering IQ Enterprises should request information about its molding machinery, supported resin types, production capacity, and experience with similar components. These details help establish whether the supplier is suitable for prototype development or ongoing production.

5. C&T Engineering, Inc.

C&T Engineering, Inc. is an injection molding and tooling company located in Seymour, Indiana. Established in 1986, the company combines plastic injection molding with an in-house tool shop for prototyping and customer mold maintenance. Its capabilities support projects ranging from prototype quantities to large-scale production, making it relevant to businesses seeking coordinated tooling and manufacturing services.

Services Offered

• Custom plastic injection molding
• Mold design and tooling maintenance
• Prototype development
• Secondary machining and over molding
• Product assembly and packaging
• Production support for short and high-volume runs

C&T Engineering works with a range of thermoplastic materials, including polystyrene, nylon, polycarbonate, high-density polyethylene, polypropylene, and acetal. Its integrated tooling and molding capabilities can help customers manage component development and repeat manufacturing through a single supplier.

6. AKKA PLASTICS Inc.

AKKA PLASTICS Inc. is an Indiana-based manufacturer specializing in thermoplastic injection molding, hot stamping, and assembly. The company supports customers that require plastic components produced to defined specifications, with additional finishing and assembly operations available for suitable projects. Its focus on production quality makes it relevant to OEMs and industrial manufacturers seeking custom molded parts.

Services Offered

• Thermoplastic injection molding
• Custom plastic component manufacturing
• In-house tooling support
• Hot stamping and decorative finishing
• Component assembly
• Quality inspection and production control

AKKA PLASTICS is worth considering for businesses that need molded plastic parts combined with secondary processing. Buyers should confirm the available materials, tooling requirements, production volumes, and quality documentation for their intended application.

7. PERIDOT, Inc.

PERIDOT, Inc. is an advanced manufacturing company located in Hoagland, near Fort Wayne, Indiana. It provides injection molding alongside CNC machining, additive manufacturing, and reaction injection molding (RIM). This combination of processes can help businesses coordinate prototype development, specialized part production, and other manufacturing requirements through a single supplier.

Services Offered

• High-pressure plastic injection molding
• Reaction injection molding
• Rapid prototyping and additive manufacturing
• CNC machining
• Contract manufacturing
• Product and tooling development support

PERIDOT is relevant to engineering teams and procurement professionals looking for flexible manufacturing support. Its range of capabilities can be useful when a project involves multiple production processes or requires prototypes before moving into manufacturing.

8. Park Plastic Products

Park Plastic Products is included in the supplied list for businesses researching injection molding suppliers in Indiana. Its current business identity, manufacturing location, and specific molding capabilities should be confirmed before it is selected for a production project.

Services to Verify

• Custom plastic injection molding
• Thermoplastic component manufacturing
• Mold design and tooling
• Prototype development
• Secondary finishing and assembly
• Production quality inspection

When assessing Park Plastic Products, buyers should request details about its equipment, available resin types, mold ownership arrangements, and ability to meet the required production schedule. Confirming these details helps determine whether the company is appropriate for a particular manufacturing application.

9. Calico Precision Molding LLC

Calico Precision Molding LLC is a plastic injection molding and assembly company located in Fort Wayne, Indiana. The company supports customers requiring precision-molded plastic parts and associated assembly services. Its manufacturing focus makes it relevant to businesses that need consistent component production and coordinated downstream operations.

Services Offered

• Custom plastic injection molding
• Precision molded component manufacturing
• Plastic part assembly
• Production support for customer-specific designs
• Component inspection and quality control
• Manufacturing coordination and delivery support

Calico Precision Molding is worth evaluating for OEMs and businesses that require custom plastic parts as part of a larger product assembly. Buyers should discuss material selection, tooling, dimensional tolerances, and production volumes to establish whether its capabilities fit the project.

How to Choose an Injection Molding Company in Indiana?

Selecting an injection molding supplier requires evaluating its technical capabilities and ability to meet your manufacturing goals.

• Molding capabilities: Determine whether the supplier offers conventional injection molding, micro molding, silicone molding, over molding, or reaction injection molding.
• Material selection: Confirm compatibility with the required resin, such as ABS, polypropylene, polycarbonate, nylon, or liquid silicone rubber.
• Tooling expertise: Ask about mold design, prototype tooling, maintenance, tooling ownership, and design-for-manufacturability support.
• Production capacity: Ensure the manufacturer can handle the required order size, cycle times, and future demand.
• Quality assurance: Review inspection methods, traceability, process validation, and relevant quality certifications.
• Secondary operations: Check whether assembly, hot stamping, machining, or other finishing services can be completed in-house.
• Total project cost: Compare tooling expenses, unit prices, material costs, finishing, packaging, and delivery timelines.

Conclusion

Indiana offers injection molding options for businesses seeking precision plastic components, silicone products, custom molded parts, and integrated manufacturing services. Makuta specializes in micro injection molding, PTG Silicones focuses on silicone molding and over molding, C&T Engineering combines tooling with plastic injection molding, and AKKA PLASTICS provides thermoplastic molding and assembly. PERIDOT offers injection molding alongside additional manufacturing processes.

The best supplier depends on component complexity, material specifications, production volume, and quality requirements. Before placing an order, verify each company's current capabilities, manufacturing location, and experience with comparable products.