What Sinicon Plastics does

Sinicon Plastics is a privately held US custom injection molding manufacturer founded in 1968 by Tony Sinico and owned since 1989 by David Allen. The company produces precision thermoplastic and silicone molded parts for medical, military, aerospace, and industrial customers, with the operational base at a 35,000 sq ft facility in Dalton, Massachusetts and a machining facility in Pittsfield, Massachusetts. The firm runs more than 20 molding machines and has been ISO 9001 certified continuously since 1995.

Its core technology stack centers on tight-tolerance injection molding (down to 0.001 inch) and micro molding of parts as small as 0.4 grams, processing high-performance engineering resins including PEEK, Ultem, Siltem, Acetal, Polysulfone, PPS, and filled materials with glass, carbon, or PTFE additives, plus medical-grade silicone across a 0-80 durometer range. Capability is delivered through a vertically integrated model: in-house tooling via RM Bell Engineering (acquired 2005), insert/over molding with three vertical presses, 5-axis simultaneous CNC machining via Advanced Machine and Tool (acquired 2019), and a 2,400 sq ft assembly room for secondary operations.

The business model is quote-based B2B custom manufacturing with multi-year contracts, servicing enterprise customers with annual volumes from hundreds to millions of parts across 700+ part numbers. The company sells direct through a small field sales organization led by a Head of Sales, with no public pricing, no disclosed revenue, no outside funding, and no parent company — operating as a family-controlled manufacturing business concentrated entirely in the US market.

Name

Sinicon Plastics

Legal name

Sinicon Plastics

Website

https://siniconplastics.com

Company type

Private

Founded year

1968

Operating status

Operating

Headcount range

11–50 employees

Short description

Sinicon Plastics is a US custom injection molder producing precision thermoplastic and silicone parts for medical, military, aerospace, and industrial customers, operating a vertically integrated tooling-to-assembly platform from its Dalton and Pittsfield, Massachusetts facilities.

Ownership category

akta.pro rank

Product category

Custom Plastic Injection Molding

NAICS

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

SIC

Plastics Products, Nec (3089), Fabricated Rubber Products, Nec (3060)

akta.pro primary industry

Precision & Micro Injection Molding (IMANAFAH)

akta.pro secondary industries

Medical & Life Sciences Injection Molding (Devices, Diagnostics, Cleanroom) (IMANAFAC), High-Performance & Engineering Polymers Injection Molding (PEEK, PPS, LCP, etc.) (IMANAFAK)

Keywords

• Custom injection molding
• Precision plastic molding
• Silicone molding services
• Medical device manufacturing
• CNC machining services

Headquarters

HQ city

Dalton

HQ country

United States

HQ region

North America

Offices2 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Personnel, Supply Chain, Operations, Infrastructure, Technology or R&D, Marketing or Sales

Revenue model

1. Custom Injection Molding Services: Molding over 700 different part numbers for medical, military, aerospace and industrial applications. Volume ranges from hundreds to millions of parts annually.

Pricing tiers

Go-to-market motion1 record

Distribution channels1 record

Marketing channels3 records

Core offering

Sinicon Plastics is a custom injection molder that produces precision thermoplastic and silicone parts for medical, military, aerospace, and industrial OEMs, with annual volumes from hundreds to millions of parts. Capabilities span micro molding, insert/over molding, in-house tooling, 5-axis CNC machining, assembly, and processing of high-performance engineering resins such as PEEK, Ultem, and Siltem to tolerances as tight as 0.001 inch.

Product overview

Sinicon Plastics is a custom injection molding company offering thermoplastic and silicone molding services with full in-house capabilities from tool design through production. The core offering consists of custom injection molding for thermoplastics and silicone materials, supplemented by in-house tooling capabilities (RM Bell Engineering, acquired 2005), machining services (Advanced Machine and Tool, acquired 2019), and assembly operations. The company specializes in micro molding, insert/over molding, and specialty engineering resins including PEEK, Ultem, and filled materials. Services span from prototyping to full production runs for medical, military, aerospace, and industrial applications.

Differentiator

Problem solved

Functional benefit

Products and services

• Custom Injection Molding (Thermoplastics) Custom injection molding of thermoplastic parts using engineering resins with tight tolerances and technical dimensions, serving volumes from hundreds to millions of parts annually for medical, military, aerospace, and industrial customers.
• Silicone Molding Injection molding of silicone parts across 0-80 durometer range, including medical-grade silicone suitable for FDA applications.
• In-House Tooling (RM Bell Engineering) In-house mold and tooling design, construction, and maintenance services for Sinicon's own molding operations, acquired through RM Bell Engineering.
• Machining Services (Advanced Machine and Tool) CNC machining of production metal parts and post-molded machining of plastic parts, performed at Sinicon's Pittsfield, MA machine shop and including a 5-axis vertical machining center.
• Micro Molding Precision molding of very small parts weighing as little as 0.4 grams with tolerances as tight as 0.001 inch, used where miniaturization is required.
• Insert and Over Molding Two-shot injection molding combining multiple materials in a single mold cycle, including insert molding performed on three vertical presses.
• Specialty Engineering Resin Molding Molding of high-performance engineering plastics including PEEK, Ultem, Siltem, Acetal, Polysulfone, PPS, and filled/reinforced compounds with additives such as glass fiber, carbon fiber, and PTFE.
• Assembly Services Secondary operations including assembly, welding, and finishing services performed in a dedicated 2,400 sq ft assembly room.

Named customers4 records

Segments4 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature5 records

Partnerships

One partnership is on record.

• RM Bell EngineeringcoreStrategic or Co-development PartnerAcquired in 2005 to provide Sinicon with in-house tooling capabilities. This strategic acquisition enabled Sinicon to offer complete vertical integration from tool design through production.

Scale indicators6 records

Recent moves9 records

Expansion highlights4 records

Direct peers

• Tessy Plastics: Custom injection molder serving medical, consumer, and industrial markets with in-house tooling and assembly. Overlaps with Sinicon across multiple verticals and full-service capabilities, though at much larger scale.
• JunoPacific: Contract manufacturer focused on precision plastic and silicone molding, assembly, and tooling for medical device OEMs. Direct overlap with Sinicon in micro-molding, silicone processing, and full-service medical device manufacturing.
• Piper Plastics: Specialty injection molder focused on high-performance engineering resins and tight-tolerance components for medical, aerospace, and industrial customers. Comparable to Sinicon's specialty resin and precision capability set.
• Crescent Industries: Custom injection molder serving medical, aerospace, and industrial markets with in-house tooling and automated assembly. Comparable mid-Atlantic/Northeast U.S. custom molder competing in the same end markets and capability profile as Sinicon.
• Spectrum Plastics Group: Precision plastics manufacturer serving medical, aerospace, and industrial OEMs with injection molding, extrusion, and assembly. Comparable to Sinicon in regulated-vertical custom molding with a broader portfolio of converting and packaging capabilities.
• Accu-Mold LLC: Specialist in micro-molding and insert molding of tight-tolerance plastic and silicone parts for medical, electronics, and aerospace. Highly comparable to Sinicon in micro-precision and specialty resin expertise.
• GW Plastics (Nolato): Precision injection molder for medical, automotive, and industrial applications, now part of Nolato. Comparable to Sinicon in tight-tolerance custom molding and medical device assembly, with greater scale and global sites.
• Phillips Medisize: A large contract manufacturer specializing in precision injection-molded plastic and silicone components for medical, pharmaceutical, and diagnostics applications. Directly comparable to Sinicon in medical micro-molding and assembly services, though at materially greater scale and global footprint.
• MTD Micro Molding: Specialist in micro-precision injection molding of thermoplastic and bioresorbable parts for medical devices, with tolerances and part sizes that closely mirror Sinicon's micro-molding envelope. A direct niche competitor in medical micro-molding.
• Plastic Components Inc. Custom injection molder with in-house tooling for medical, industrial, and electronics OEMs. Comparable to Sinicon in offering a vertically integrated custom molding solution to regulated customers.

Market position

Strengths4 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/sinicon-plastics-inc-

Compliance1 record

Revenue estimate

Valuation estimate

Number of profiles

Profiles6 records

Subsidiaries2 records

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 Sinicon Plastics