- Heartland of the US to the World
Sixty years of precision injection molding in the heart of America. From a 5-gram drone bracket to a 10-pound industrial housing, we build the part, the mold, and the relationship that holds your supply chain together.
Presses on the floor
21 Active
Clamp tonnage range
50-1,000 Ton
Shot capacity
2-75 Oz
Part weight range
5 G-10 Lb
Resin families
9+ Engineering
Quote turnaround
1 Business Day
AT-A-GLANCE
From the first sketch to the loading dock, we own every step in-house or through mold makers we’ve worked with for decades. No finger-pointing. No supplier roulette.
Aerospace housings. Drone airframe brackets. Munitions components. Medical disposables. Plumbing fittings that have to seal the first time, every time. If it has to work, we’ve probably made one.
03 The Map Process
Quality control is not a department here. It's a sequence built into the production floor, starting the minute resin pellets arrive at the dock.
Statistical Process Control [SPC: real-time data on every machine] and Statistical Quality Control [SQC: dimensional integrity of every part run] feed a centralized network that flags variance before parts ship — not after.
Every shipment of resin is checked for type, grade, and purity at the dock. Substandard material is returned to the supplier the same day.
Operators inspect every part for shape, color, and dimensional integrity. SPC charts run on every press, every shift.
QC technicians sign off before a single carton is sealed. Records and retained samples are kept on every production run, of every mold.
Welding, packaging, sub-assembly — performed in-house or by vetted partners. We take responsibility for the finished good either way.
04 Equipement
Enough range to mold a 5-gram electronics housing on a Newberry 50-ton on Tuesday and a 10-pound industrial cover on a Farrel 1,000-ton on Wednesday. Without leaving Kansas City.
Modern Alpha Plastics was formed in 1996 when two of Kansas City's most respected custom molders — Modern Plastics Molding (founded 1965) and Alpha Plastics — merged into a single shop with sixty combined years of precision injection experience.
Today, the company is led by Anthony C. Gross, President and Chief Engineer. Anthony brings the design background of a working engineer and the operating discipline of an owner-operator. Most quotes pass across his desk. Most molds get a second look from him before the first shot. That's not a marketing line — it's how a 21-press shop with a 60-year reputation actually runs.
Employee longevity is the foundation of the floor. Several families are represented here by two generations. The same operator who started a job at 7 a.m. is often the one who signs off the last carton before it ships.
Read the full company history →Upload a STEP, IGES, drawing, or even a photo. We’ll come back to you in one business day with a real engineer’s read on whether we’re the right shop — and what it’ll cost.
