What qualifies as a large-part injection molding project?

A large-part molding project typically involves oversized components, thick wall sections, or structural parts that require higher clamp force and specialized tooling. These parts often exceed the capacity of standard molding equipment and require high-tonnage machines.

What is the benefit of high-tonnage molding capability?

High-tonnage molding enables the production of larger, more structurally demanding parts without compromising design integrity. It also provides flexibility for thicker materials, reinforced designs, and complex geometries that require higher pressure and stability during molding.

What is UPM’s maximum molding capacity?

UPM supports injection molding up to 2,000 tons. This enables the production of large structural components, specialty vehicle parts, and other oversized applications within a single manufacturing partner.

Can large molded parts still meet cosmetic requirements?

Yes, large molded parts can meet cosmetic standards when process control and tooling are properly managed. Factors such as material flow, surface finish, and tooling configuration are evaluated to maintain consistency across visible surfaces.

When do companies need high-tonnage molding capability?

High-tonnage capability becomes necessary when part size, wall thickness, or structural requirements exceed standard press limits. It is commonly required for large housings, industrial components, and applications where strength and scale are critical.

Large-Part & High-Tonnage Injection Molding

Universal Plastic Mold (UPM) operates 30 injection molding machines from 150 to 2,000 tons at its Baldwin Park, California facility — including five presses at 1,500 tons or higher and three at 2,000 tons. This makes UPM among the largest tonnage capacity available on the U.S. West Coast. UPM specializes in large-format, structural, and thick-wall plastic parts that exceed the capacity of standard injection molding equipment, including oversized housings, specialty vehicle components, and industrial parts.

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universal plastic mold, large-part & high-tonnage molding

Specs at a Glance

Spec	UPM Capability
Tonnage range	150 to 2,000 tons
Total machines	30 injection molding machines
Presses at 1,500+ tons	5
Presses at 2,000 tons	3
Maximum shot weight	~540 oz on the 2,000-ton press
Maximum platen dimension	94.5″ × 77.3″
Materials	Engineering-grade thermoplastics: ABS, PC, PP, PE, Nylon, PC/ABS, TPE, glass-filled grades
Glass-filled grades	Glass-filled PP, ABS, and Nylon
Quality system	ISO 9001:2015 certified, IATF 16949 compliant
Documentation	PPAPs, First Article Inspections (FAI), full traceability
Location	Baldwin Park, California

Our CapabilitiesWhat Large Part Molding Requires

Large-format injection molding introduces technical demands that standard presses cannot handle:

Controlled material flow across extended surfaces and long flow paths

Structural integrity under high clamp force (up to 2,000 tons at UPM)

Dimensional stability in thick-wall sections

Cosmetic consistency on visible exterior panels — controlling sink marks, knit lines, and flow marks

Tooling built for high-cycle production runs

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Whether you’re evaluating a new project, facing production challenges, or looking for a more reliable manufacturing partner, our team is ready to help you find the right solution.

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UPM combines large-tonnage press capacity with ISO 9001:2015–certified process control and in-house DFM review.

UPM’s Large-Tonnage Press Capacity

150 to 2,000 Ton Injection Molding Across 30 Machines

UPM operates 30 injection molding machines from 150 to 2,000 tons, with five presses at 1,500 tons or higher, including three 2,000-ton presses. The largest 2,000-ton press supports shot weights up to ~540 oz and platen dimensions up to 94.5″ × 77.3″, enabling structural parts well beyond the capacity of typical regional molders.

Materials regularly run on the large-tonnage presses include engineering-grade thermoplastics — ABS, polycarbonate, polypropylene, polyethylene, nylon, PC/ABS, TPE, and glass-filled grades (glass-filled PP, ABS, and nylon).

Typical large-part applications include:

Oversized housings and enclosures
Structural automotive and specialty vehicle components
Heavy-duty industrial parts
Large-format packaging

This range allows UPM to keep both small and large parts of the same program under one roof — eliminating the need to split production between suppliers as part size grows.

Why Tonnage Capacity Matters

Most regional molders operate within narrower tonnage ranges, typically capping out at 700 to 1,000 tons. For programs that exceed those limits, designers often have to compromise geometry, split large parts into multiple molded sections that are bonded or fastened, or change materials to fit a smaller press.

UPM’s 2,000-ton press capacity allows large structural parts to be molded in one piece, in one facility — reducing assembly steps, eliminating bonded seams, and protecting long-term part reliability.

Engineering Oversight on Large Parts

Large-format parts amplify the cost of DFM oversights. UPM engineers review wall thickness, rib geometry, gating, and material selection before tooling is cut. See Design for Manufacturability → for full detail.

Turnkey Integration for Large Parts

Molded large parts can transition directly into in-house painting, silk-screening, sub-assembly, labeling, packaging, and distribution. See Complex Assembly & Finishing → and See Kitting, Packaging & Distribution → for full detail.

Case Study: Structural Pallet Base Pan

An OEM in the water-heating equipment industry came to UPM needing a structural base pan rated to 600 lbs. with a 4× safety factor. The original 24+ lb glass-filled nylon design required a 2,000-ton press at a unit cost the customer couldn’t accept (~$78/piece). Through DFM-driven redesign — wall thickness reduction to 0.150″, rib optimization, and material substitution to polypropylene — UPM cut part weight 65%, dropped press requirement to 1,000 tons, and reduced unit cost ~66% to $26.28/piece while preserving the 600 lb load capacity.

See Water Heater Pan Case Study →

FAQsFrequently Asked Questions

What qualifies as a large-part injection molding project?

A large-part molding project typically involves oversized components, thick wall sections, or structural parts that require higher clamp force and specialized tooling. These parts often exceed the capacity of standard molding equipment and require high-tonnage machines.
What is the benefit of high-tonnage molding capability?

High-tonnage molding enables the production of larger, more structurally demanding parts without compromising design integrity. It also provides flexibility for thicker materials, reinforced designs, and complex geometries that require higher pressure and stability during molding.
What is UPM’s maximum molding capacity?

UPM supports injection molding up to 2,000 tons. This enables the production of large structural components, specialty vehicle parts, and other oversized applications within a single manufacturing partner.
Can large molded parts still meet cosmetic requirements?

Yes, large molded parts can meet cosmetic standards when process control and tooling are properly managed. Factors such as material flow, surface finish, and tooling configuration are evaluated to maintain consistency across visible surfaces.
When do companies need high-tonnage molding capability?

High-tonnage capability becomes necessary when part size, wall thickness, or structural requirements exceed standard press limits. It is commonly required for large housings, industrial components, and applications where strength and scale are critical.

When your design grows, your capacity should not shrink.

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