Plastic Industries Custom Molding

What Plastic Industries Custom Molding does

Plastic Industries Custom Molding (PI, Inc.) is a third-generation, family-owned custom plastics manufacturer founded in 1952 and headquartered at 213 Dennis Street, Athens, Tennessee. The company offers four core production services: high-pressure plastic injection molding on machines ranging from 88 to 1500 tons, low-pressure gas-assist structural foam molding on 375-500 ton machines, plastic vacuum forming and thermoforming of parts up to 8 feet wide, and RF welding and dielectric sealing through its wholly-owned subsidiary Sealtech, which operates three additional US locations. Capabilities extend from bottle-cap-scale parts to 8-foot plastic pallets, with daily throughput up to 500,000 small parts, supported by in-house tooling design, a tool room, integrated warehousing, press-side packaging, hot stamping, sonic welding, and ISO 9001-certified quality systems.

The company sells exclusively through direct B2B enterprise engagement: customers submit detailed quote requests with project specifications, initial and annual quantities, current supplier information, and approval hierarchies, and pricing is determined per project rather than through published tiers. PI positions itself as a full-service concept-to-market partner, walking customers from design and engineering through tooling, production, and warehousing. Named customers include Hydra Pools, Knight Rifles, and Revenant Custom Rifles, with the broader customer base spanning Fortune 500 accounts and small regional businesses across medical, recreational, military, aerospace, poultry, firearms, plumbing, electrical, structural, packaging, furniture, and swimming pool industries. Distribution is direct with no reseller or intermediary channels, and marketing is limited to the custommolding.com website and quote-request funnel.

Revenue is not publicly disclosed and no funding rounds, executive team, or financial filings are present in the available data. The business is privately held with no disclosed institutional investors, and Sealtech, originally founded in the early 1970s for nuclear and recreational industry work, was acquired by PI in 1983 and relocated from Colorado to Tennessee to become its RF welding arm. There is no public API, no software product, no AI/ML capability referenced, and limited digital infrastructure beyond the company website.

Name

Plastic Industries Custom Molding

Legal name

PI, Inc.

Website

https://custommolding.com

Company type

Private

Founded year

1952

Operating status

Operating

Headcount range

1–10 employees

Short description

Plastic Industries Custom Molding (PI, Inc.) is a third-generation, family-owned custom plastics manufacturer in Athens, Tennessee offering plastic injection molding, structural foam molding, vacuum forming, and RF welding through its Sealtech subsidiary to Fortune 500 and regional customers across medical, military, aerospace, firearms, and consumer industries.

Ownership category

akta.pro rank

Product category

Custom Plastic Injection Molding

NAICS

All Other Plastics Product Manufacturing (326199), Other Plastics Product Manufacturing (32619), Plastics Product Manufacturing (3261)

SIC

Plastics Products, Nec (3089), Miscellaneous Plastics Products (3080)

akta.pro primary industry

Custom Injection Molding & Contract Manufacturing (Job Shops/CMs) (IMANAFAJ)

akta.pro secondary industries

Industrial & Machinery Injection Molded Components (Gears, Wear Parts) (IMANAFAF), Medical & Life Sciences Injection Molding (Devices, Diagnostics, Cleanroom) (IMANAFAC)

Keywords

• Custom plastic injection molding
• Structural foam molding
• Plastic thermoforming services
• RF welding sealing
• Custom mold manufacturing

Headquarters

HQ city

Athens

HQ country

Greece

HQ region

Europe

Offices2 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Supply Chain, Operations, Personnel, Infrastructure, Marketing or Sales

Revenue model

1. Custom Manufacturing Services: Plastic Industries generates revenue through custom manufacturing services including plastic injection molding, structural foam molding, vacuum forming, and RF welding. They operate as a job-shop style manufacturer producing custom parts from concept through production, serving diverse industries from furniture to swimming pools to poultry products.

Pricing tiers

Go-to-market motion1 record

Distribution channels1 record

Marketing channels2 records

Core offering

Plastic Industries Custom Molding (PI, Inc.) is a third-generation, family-owned custom plastics manufacturer offering high-pressure plastic injection molding, low-pressure gas-assist structural foam molding, plastic vacuum forming/thermoforming, and RF welding/sealing services through its wholly-owned subsidiary Sealtech. The company serves as a job-shop style contract manufacturer producing custom parts from concept through production, with in-house tooling design, warehousing, and secondary finishing capabilities, supporting industries ranging from furniture and swimming pools to firearms, medical, aerospace, and military applications.

Product overview

Plastic Industries Custom Molding operates as a third-generation family-owned custom manufacturing company offering four core production services: Plastic Injection Molding (machines from 88 to 1500 ton, shot sizes 6-260 oz), Low Pressure Gas Assist Structural Foam Molding (375-500 ton machines, up to 150 lb shots), Plastic Vacuum Forming/Thermoforming (up to 8ft parts), and RF Welding/Sealing through its Sealtech subsidiary (1" x 1" to 5' x 12" welds). The company provides in-house tooling design and manufacturing, warehousing, integrated quality control, and secondary finishing services (packaging, hot stamping, sonic welding). All facilities are ISO 9001 certified. The company serves diverse industries including medical, recreational, military, aerospace, poultry, firearm, plumbing, electrical, structural, and packaging sectors.

Differentiator

Problem solved

Functional benefit

Products and services

• Plastic Injection Molding High-pressure custom plastic injection molding service using machines ranging from 88 ton to 1500 ton with shot sizes from 6 to 260 ounces. Daily capacities range from several hundred large parts to over 500,000 smaller parts per day. Works with resins including PET, PPO, Acetal, and Flexible PVC. Serves enterprise and regional industrial buyers needing parts from bottle-cap size to large components.
• Low Pressure Gas Assist Structural Foam Molding Low-pressure injection molding process using nitrogen gas assist to produce lighter-weight, more durable parts with up to 40% density reduction versus base material. Machines range from 375 ton to 500 ton with shot capacity up to 150 pounds. Primarily processes high-density polyethylene (HDPE) and is targeted at applications requiring improved strength-to-weight ratios and thermal/acoustic insulation such as swimming pool walls and large industrial components.
• Plastic Vacuum Forming / Thermoforming Vacuum forming service using shuttle machines capable of thermoforming parts up to 8ft wide with deeper pulls than industry standard. Forms thermoplastics including ABS, GP Polystyrene, Polystyrene, Nylon, Polypropylene, and High Impact Polystyrene (HIPS). Suitable for transparent materials such as acrylic. Targets customers needing large-format thermoformed components across diverse industrial applications.
• RF Welding / RF Sealing (Sealtech) Radio frequency welding and dielectric sealing services delivered through the wholly-owned subsidiary Sealtech, which operates three RF welding locations across the United States. Capabilities range from parts as small as 1 inch x 1 inch to large surface welds of 5ft x 12ft. Materials include vinyl, vinyl-coated nylon, urethane, urethane-coated nylon, exotic materials, and portable materials. Additional services include silk screening, pad printing, sewing, product retail packaging, thermoforming, and part prototyping. FDA-certified and ISO 9001:2008-certified operations serving medical, military, aerospace, automotive, seating, and safety industries.
• In-House Tooling Design and Manufacturing Standalone in-house tooling design, on-site tool room, and fully equipped tool facility services. Includes international tool sourcing. Offered to customers as a dedicated service supporting their custom molded part programs.

Named customers3 records

Segments2 records

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature4 records

Partnerships

One partnership is on record.

• SealtechcoreOEM/ Whitelabel/ Licensing Partner · 1 January 1983Sealtech was founded in the early 1970s to serve the Nuclear and Recreational Industries. Acquired by Plastic Industries in 1983 and moved from Colorado to Tennessee. Sealtech operates RF welding services at 3 locations around the United States. The partnership enables PI to offer complete RF sealing capabilities for medical, military, aerospace, automotive, and safety industries.

Scale indicators5 records

Recent moves4 records

Expansion highlights3 records

Direct peers

• Mack Molding: Mack Molding is a vertically integrated custom injection molder providing molding, tooling, assembly, and fulfillment services. Comparable to PI in offering in-house tooling, contract manufacturing, and serving multiple end markets including medical and industrial.
• Protolabs: Protolabs is a leading digital manufacturer offering custom plastic injection molding, CNC machining, and 3D printing services with automated quoting. It directly competes with PI in custom injection molding but differentiates through a technology-first, self-service platform rather than traditional field sales.
• EVCO Plastics: EVCO Plastics is a custom injection molder offering design, engineering, tooling, and production services across multiple industries including medical, industrial, and consumer. It is closely comparable to PI in service breadth, customer mix, and contract manufacturing model.
• Rodon Group: Rodon Group is a high-volume custom injection molder specializing in large-scale production runs with in-house tooling and design capabilities. Comparable to PI's vertical integration model (tooling + production) and high-volume capacity claims, serving industrial and consumer markets.
• Tessy Plastics: Tessy Plastics is a custom injection molder serving medical, consumer, and industrial markets with extensive manufacturing capabilities. Directly comparable to PI in contract manufacturing model, multi-industry exposure, and emphasis on medical-grade production.
• Placon: Placon is a custom plastics manufacturer producing injection molded and thermoformed products for medical, retail, and consumer markets. Comparable to PI across injection molding, thermoforming (vacuum forming), and serving multiple end markets with custom manufacturing services.
• HTI Plastics: HTI Plastics is a custom injection molding and assembly provider serving medical, industrial, and consumer markets. Comparable to PI in contract manufacturing model, medical market exposure, and offering of secondary services like assembly and packaging.
• Xometry: Xometry operates an on-demand manufacturing marketplace connecting customers with custom manufacturers including injection molding, CNC, and sheet metal services. It is a direct competitor to PI in custom plastic manufacturing with an AI-driven quoting platform that represents the digital disruption PI faces.
• Stack Plastics: Stack Plastics is a custom injection molder specializing in tight-tolerance medical, biotech, and electronics applications. Comparable to PI's medical and electrical end-market exposure, though Stack Plastics focuses more narrowly on precision molding.

Broad incumbents

• Bemis Manufacturing: Bemis Manufacturing is a larger diversified plastics manufacturer producing injection molded products for furniture, industrial, and consumer markets. Comparable to PI in serving furniture and industrial end markets with injection molding, but at significantly greater scale and vertical integration.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks7 records

Key highlights7 records

Customer concentration

Compliance2 records

Revenue estimate

Valuation estimate

Number of profiles

Subsidiaries1 record

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Plastic Industries Custom Molding