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Large Part Molding

High Press Tonnage Plastic Injection Molding Services

Choose the right injection molding company for your next large part molding project.

How to Choose a Plastic Injection Molder for your Project

Choose the right plastic injection molder for your project by identifying large part molding companies that can meet your project requirements. Facilities with a wide range of press sizes will be able to accommodate your needs. Look for a company that can design and build the mold, as they will ahve a better understanding of how to maximize the manufacturing process. Choosing the right injection molding company will ensure your project is done as efficently and cost-effective as possible.

Lage Part Molding from Lerner Molded Plastics

Lerner Molded Plastics operates an ISO certified, state-of-the-art facility, where they accommodate a variety of product sizes, from small to large plastic parts, with high tonnage presses. Lerner’s facility is equipped with presses that achieve clamping forces from 30 to 3000 tons, with up to 64 cavities.

Lerner Molded Plastics a Full Service Provider

Lerner Molded Plastics can also support production with capabilities such as engineering and product development. Additional services include mold making and tooling, finishing operations, supply chain management, and logistical support. See below for more information on each of Lerner’s services.

Blow Molding

Lerner utilizes advanced blow molding equipment in single or dual head configurations with up to 40-lb. capacity. Their shuttle press systems can provide high-volume production, and their capabilities can accommodate components that feature multiple cavities of varying sizes.

Plastic Extrusions

Lerner’s custom plastic extrusion services provide quality OEM, automotive, and consumer products. Specializing in manufacturing single, co, and tri-extruded plastic profiles, pipes, and tubes. Lerner applies a combination of materials to meet the requirements of flame-retardant and food-grade applications. lerner is a UL-certified molder, operating an ISO certified facility to accommodate anything from prototypes to high-volume runs.


Lerner Molded Plastics provides precision thermoforming to a wide variety of industries, including OEM, consumer products, automotive, and more. Advanced equipment is used for thin-gauge, high-production output thermoforming, and rotary machines and single station equipment is used for heavy-gauge thermoforming. Manufacturing capabilities include components up to 15′ long, accommodated with both male and female tooling. Accurate trim tolerances can be met with CNC trimming equipment.

Rotational Molding

A highly desirable option for manufacturing large parts with lower volumes. Lerner provides rotational molding services to customers in the OEM, consumer products, and automotive industries. Lerner’s rotational molding equipment is capable of molding parts up to 25′ long, and up to 175 lbs., with single or multiple cavities, in custom colors.

Tooling Design & Build

Lerner provides mold design services for injection molding, blow molding, thermoforming, rotational molding, and extrusion. Manufacturing capabilities include small precision tools to large, single-cavity tools. They also fabricate checking and assembly features.

Secondary Services

Secondary services offered by Lerner include decorating – hot stamping, complete electronics assembly and packout capabilities.

Supply Chain Services

Complete supply chain services offered by Lerner include local sourcing of all raw materials, packaging, sub-assembly components, warehousing of finished products, and direct drop ship capabilities to customers.

What is Injection Molding?

Plastic injection molding is a reliable manufacturing process commonly used for producing mass quanities of identical plastic parts. Injection molding gives manufacturers the ability to produce parts in a cariety of shapes and sizes, including small and large part molding. The process offers benefits such as low scrap rates and the ability to produce identical parts.

How Does Plastic Injection Molding Work?

An injection molding machine contains 3 parts: the hopper, the screw and a heated barrel. The hopper sends resin pellets through the heated barrel. The material is then melted by a screw outfitted with heaters. The palstic is injected through the nozzle into a mold cavity, where it solidifies to the configuration of the cavity. After the process is complete, the parts are boxed and shipped.

For more information about large part molding from Lerner Molded Plastics, please contact us today.