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Author Archives: Lerner Molded Plastics

  1. Plastic Tooling for Injection Mold Design

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    Plastics Manufacturing Experts.

    A Guide to Plastic Tooling for Injection Molding

    Click to Expand Plastic Injection Molds

    Injection molding is a key manufacturing process for most modern industries. It is a versatile process that manufacturers can customize to achieve different end products. To settle on a particular injection molding design, companies should decide on the type of mold, final product quality, and the end-use application. We’ll discuss these considerations here to help you determine the best injection molds and tooling for your production needs.

    Types of Plastic Injection Molds

    There are several different types of plastic injection molds, depending on their feeding system, cavities, and mold opening:

    • Feeding system
      • Hot runner injection mold: This type of injection mold has a heated channel that guides the molten plastic into the tool cavity. The runners are part of the mold and the temperature is kept above the plastic’s melting point to keep the material liquid.
      • Cold runner injection mold: Cold runner injection molds use an unheated physical channel directing the liquid plastic into the cavity. The runner is cooled and ejected with the part after each injection cycle.
    • Number of cavities
      • Single cavity: Single cavity molds produce one part per injection cycle. Tooling costs are low, while unit cost is higher. These molds are best for low-volume production runs.
      • Multi-cavity: With a multi-cavity mold, multiple parts are made per cycle, which raises initial tooling costs and lowers the per-unit price. Thus, multi-cavity molds are an effective way to increase production.
      • Family mold: A family mold produces at least two different parts in a single injection cycle.
    • Mold opening
      • Two-plate mold: Two-plate molds are the most common type of mold opening, where two plates join and split at a parting line.
      • Three-plate mold: Three-plate molds have two parting planes that split the mold into three sections.

    Design Considerations for Injection Molding

    There are several injection mold design considerations that may affect the final product quality and process repeatability, including:

    • Size. Injection plastic molding has a maximum shot size, which limits the amount of molten plastic that can be injected per cycle. Shot sizes can range from 3 oz to 600 oz.
    • Materials. There are many different materials you can use, and each behaves uniquely during the injection molding process and results in different final products. Materials include acetal, high-density polyethylene (HDPE), polycarbonate, acrylic, nylon, polypropylene, and more.
    • Surface finishes. Injection molding can produce parts with various surface finishes, from textured to matte to glossy.
    • Color matching and secondary finishing. Customers can also request that part colors match certain Pantone numbers or other samples. Other secondary finishing services include pad printing—to add company logos—and laser engraving for part traceability purposes.
    • Draft. Adding drafts to the mold facilitates easier removal of the part after each injection cycle.
    • Undercuts. Undercuts are part features that cannot be injection molded with a basic two-part mold because the material itself prevents ejection or blocks the mold from opening. The injection mold design must take undercuts into consideration by either avoiding them or redesigning the existing mold.
    • Wall thickness. The ideal wall thickness is based on the material you select. For example, the recommended wall thickness for injection molding with ABS is 0.045 to 0.140 inches, which differs from the 0.030 to 0.120 inch recommended thickness for acetal injection molding.
    • Radii. Adding radii means rounding out sharp corners, which allows the material to flow easier and makes the part easier to remove.

    Plastic Tooling for Injection Molding Applications

    Injection Machine

    Applications for injection molding include:

    • Consumer goods
    • Medical devices
    • Electronics
    • Packaging
    • Telecommunications
    • Mechanical parts
    • Decorative products
    • Firearm components
    • Furniture
    • Hardware
    • Pet products
    • Pressure transducers
    • Toys
    • Window components

    Plastic Tooling for Injection Molding From Lerner Molded Plastics

    With over 25 years of experience, Lerner Molded Plastics is an ISO 9000-2000 certified manufacturer of plastic injection molds and tooling. We offer injection molding, tooling, and mold-making services to customers across diverse industries. Our capabilities range from small, precision tools to large, multi-cavity tools that include aluminum tooling prototypes. We also fabricate assembly and check fixtures.

    Plastic injection molding can be a daunting process with many options to choose from, but we can guide you through these considerations and help you decide on the best injection molding tooling and part design for your project. To see how we can help, contact us today. If you’re ready to get started, request a quote.

  2. Reshoring Plastic Manufacturing in the USA

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    In the late 1970s, the increase in global competition, the deficit in trade, and the dismantling of trade barriers led many manufacturers in the United States—including plastic manufacturers—to offshore their operations in an effort to lower production costs. By moving manufacturing operations to China and other overseas countries, they could take advantage of cheaper labor, faster turnaround, and looser regulations. However, over the years, increasing awareness of the inherent problems associated with offshoring—e.g., language/cultural barriers, poor product quality, risk of IP theft, supply chain delays, etc.—have led many manufacturers to look to reshoring their operations to improve cost of ownership. Additionally, with increased pressure to level the playing field, tariffs have been put in place on all Chinese imports, that have lessened the overall competitiveness that China has enjoyed. The field is now ripe for reshoring to blossom.

    Plastics Manufacturing Experts.

    What Is Reshoring?

    Reshoring—also sometimes called backshoring or inshoring—is the opposite practice to offshoring. It involves bringing manufacturing operations that were previously outsourced to overseas countries back to the home country of the company. Either some or all of the offshore operations can be returned, depending on the needs and desires of the company.

    Why Should You Choose Plastic Manufacturing in the USA?

    Reshoring Plastic Manufacturing In The USA

    (Click Infographic to Enlarge)

    While the significant cost of reshoring manufacturing operations may be a deterrent to many companies, the practice offers a number of advantages that can help offset it, such as:

    • Lower total cost of ownership. While offshoring manufacturing operations initially proved to be more cost-effective, rising labor, newly enforced tariffs, and shipping costs have reduced the cost-savings experienced by choosing offshore over onshore/reshored manufacturing. Additionally, by reshoring operations back to the USA, companies can avoid paying import and export tariffs on their goods, which can be as high as 25–35%.
    • Higher product quality. Overseas manufacturers may not have access to the same quality materials and equipment as those found in North America. Additionally, the standards they uphold may not be as high as those upheld in North American facilities. Working with a manufacturer with a US-based facility ensures each aspect of the manufacturing process will be conducted as per US industry standards. It also makes it easier to maintain control and oversight over operations.
    • Shorter lead times. Moving manufacturing operations to domestic soil decreases the time it takes for finished products to be delivered to domestic distribution facilities and end-users. It also decreases the risk of shipping delays caused by global supply chain and shipping disruptions.
    • Better tooling ownership. In the United States, most manufacturers deliver the tooling (e.g., molds) used to make custom products to the client after the project is completed. This practice allows the client to choose whether they work with the same company or a different company in the future. It also minimizes the risk of other clients getting a hold of the custom product design.
    • Greater local/domestic benefits. Reshoring generates more domestic job opportunities with regard to product manufacturing, distribution, sales, servicing, and integration and ensures the taxes paid by the company go toward improvements within the country.
    • Smaller risk of IP theft. Sending proprietary designs to another facility operated by a separate company in a different country increases the risk of unauthorized persons accessing, stealing, and copying them. Onshore/reshored manufacturing operations eliminate this risk by ensuring designs are sent to domestic facilities with stricter security standards.

    The above benefits both manufacturers and customers. Since the manufacturer encounters lower ownership costs, receives higher quality products, and experience shorter lead times, their customers can be given better products at lower prices with faster turnaround.

    Reshore With Lerner Molded Plastics Today!

    Today, a growing number of US corporations are transitioning from offshore to reshored plastic manufacturing operations. Additionally, more and more companies are choosing to work with manufacturers with onshore or reshored manufacturing operations rather than offshored ones due to the many advantages they offer.

    If you’re looking for an experienced and knowledgeable US-based plastic manufacturer, turn to the experts at Lerner Molded Plastics! We specialize in plastic manufacturing, offering molding, forming, assembly, design, tooling, and supply chain services. To learn more about our capabilities or discuss your project requirements with one of our team members, contact us or request a quote today.

  3. What Is Plastic Injection Molding?

    Plastic injection molding

    (Click Infographic to Enlarge)

    Plastic injection molding is a manufacturing process that involves the process of injecting melted plastic resins into a prefabricated mold to create a variety of parts and components. This highly versatile and cost-effective process is used to manufacture a variety of products, from children’s toys to complex engineering components.

    For more than 35 years, Lerner Molded Plastics has been a leading provider of plastic injection molding services for customers in a wide range of industries. Our state-of-the-art facility allows us to produce quality injection molded parts from the initial design phase through full-scale production and distribution. Whatever your needs, we have the knowledge and skill to create your product or component with the utmost speed and efficiency, all while staying within your budget.

    To help you determine whether plastic injection molding is the right choice for your project, we have created a comprehensive guide to the plastic injection molding process, materials, and benefits.

    Plastic Injection Molding Process

    Plastic injection molding uses high pressure and heat to force melted plastic into a heated mold, where it takes on the desired shape as it cools. The cooled product is smooth and often requires very little additional processing. Although the details of the process may vary depending on the product and material, the plastic injection molding process typically follows these six steps.

    1. Mold Creation

    A mold is manufactured from a durable, heat-resistant material such as aluminum, steel, or beryllium-copper alloys. Molds are typically CNC machined and finished to extremely precise dimensions to ensure highly accurate and repeatable molded products. Injection molds can be designed with single or multiple gates, through which the melted plastic is injected, and must be able to open on a hinge or sandwich design to allow for part ejection once it has cooled.

    2. Clamping

    To ensure that the mold does not expand, contract, or become separated when exposed to the high temperatures and pressure of injection molding, the mold must have a secure clamp. The clamping force must be calibrated to ensure that the melted plastic can be injected with enough force to completely fill every part of the mold without material leakage.

    3. Injection

    The injection process is initiated when plastic beads, powder, or pellets are placed in a hopper, which feeds the material into a heated barrel, causing the plastic to melt while the turning screw simultaneously propels it toward the injection head. The injection head deposits a specific amount of molten resin into the mold at high pressure to ensure that the mold is completely filled.

    4. Cooling

    After the resin is injected into the mold, the mold is allowed to cool. The plastic hardens as it cools, solidifying into the desired shape. The cooling process is calibrated to ensure that the material cools at the right pace to produce optimal shape, hardness, and surface finish.

    5. Ejection

    The cooled part is ejected from the mold using built-in ejection pins. It is important to ensure that the part is thoroughly cooled in order to avoid damage. Ejection timing is based on the required cooling time for a given part’s size, shape, and material.

    6. Finishing

    Plastic injection molded parts are ejected with a smooth surface that requires very little finishing, though specialty coatings and finishes may be added for specialized applications. Most often, the only finishing necessary is the removal of excess plastic around the channels where the resin was injected.

    Plastic Injection Mold & Plastic Components for the Electronics Industry

    Common Materials

    Plastic injection molding can be used to manufacture parts from a wide range of materials, including:

    • High Density Polyethylene (HDPE). A versatile, affordable thermoplastic with high tensile strength and stiffness, HDPE is waterproof, resistant to microbial growth, chemically resistant, and offers good electrical insulation.
    • Polypropylene (PP). PP is a rigid, crystalline thermoplastic valued for its high strength-to-weight ratio, stiffness, electrical resistance, and chemical resistance. It also bears stress and has high impact resistance.
    • Polystyrene (PS). A low-cost thermoplastic with high strength and exceptional clarity, PS is useful for clear packaging and lab equipment, or can be colored for use in consumer products.
    • Nylon. Nylon is an extremely versatile thermoplastic blend that can be tailored to meet the needs of particular products. Nylon blends are extremely tough, with high chemical and thermal resistance and low friction.
    • Acrylonitrile butadiene styrene (ABS). ABS is an affordable engineering thermoplastic valued for its structural strength, stiffness, impact resistance, chemical resistance, thermal resistance, and electrical insulation.
    • Acetal. Acetal isa strong, tough semi-crystalline thermoplastic with exceptional chemical resistance, high mechanical stability, extreme creep resistance, and a low friction coefficient.
    • Polycarbonate (PE). PE is a highly durable amorphous thermoplastic with extreme dimensional stability, good impact strength, exceptional optical clarity, and good electrical insulation.
    • Polyester (PET / PETG). Polyester is an extremely stress-resistant semi-crystalline thermoplastic with high dimensional stability and exceptional resistance to chemicals and heat.
    • Acrylic. Acrylic is an extremely transparent thermoplastic with high resistance to UV radiation, exceptional impact strength, and high dimensional stability.

    Advantages of Plastic Injection Molding

    Plastic injection molding is an extremely efficient and cost-effective process that can be used to create extremely complex components with a high degree of accuracy and repeatability. Some of the benefits of plastic injection molding include:

    • Efficiency. Plastic injection molding uses the same mold for multiple runs, making it a quick and efficient way to produce multiple components. In addition, products straight out of the mold typically have a smooth finish that requires very little additional processing, thereby reducing time and labor.
    • Accuracy. Since the plastic resin is injected into the mold at high speed, it is forced to fill every cavity in the mold, ensuring extreme accuracy on even the most complex components.
    • Less Waste. Leftover thermoplastic material from the plastic injection molding process can be added to the next load, thereby eliminating process waste. In addition, many of the thermoplastics used in injection molding are recyclable, reducing overall waste.
    • Low Costs. Injection molding uses the same molds for multiple products, making it less expensive than many other manufacturing processes.
    • Variety of Material and Color Options. A wide variety of plastic materials and blends can be used in the plastic injection molding process to create products in nearly any color.

    Plastic Injection Molding Industries and Applications

    The versatility, accuracy, repeatability, and many other benefits of the plastic injection molding process make it a popular manufacturing choice for numerous industries, including:

    • Building and construction for pipes, fixtures, hand tools, pulleys, and sprockets.
    • Food and beverage for packaging, bottles, line process equipment, and dispensing equipment.
    • Medical and pharmaceuticals for medical devices, surgical implements, and packaging for medical equipment and pharmaceuticals.
    • Automotive for interior handles, knobs, and fixtures.
    • Consumer goods for appliances, garden supplies, tools, furniture, and decor.
    • Housewares for disposable and reusable silverware, plates, bowls, cups, and mugs.
    • OEM for custom-designed mechanical and engineering components.
    • Toys for building blocks and other brightly colored children’s toys and games.

    Expert Plastic Injection Molding Services From Lerner Molded Plastics

    At Lerner Molded plastics, we pride ourselves on providing our customers with the highest quality injection molding services and materials in the industry. From very small tight tolerance parts to extremely large products requiring high tonnage clamping forces, we have the equipment and experience to handle any size part requirement. As an industry-leading plastic injection molding company, it is our goal to ensure reliable, repeatable products that meet even the most stringent industry standards and specifications. Whether you are in need of large-scale production of a simple toy design or intricate custom OEM components for industrial manufacturing, we have the equipment, experience, and skill necessary to provide you with exceptional quality components every time.

    To learn more about our superior plastic injection molding services, contact the experts at Lerner Molded Plastics today, or request a quote for your next project.

  4. Mold Large Plastic Parts

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    If you want to know how to mold large plastic parts with precise, cost-effective methods, Lerner Molded Plastics can help. Lerner is a leading manufacturer of large plastic parts in Northeast Ohio.

    Our staff combines countless years of experience in the plastic parts manufacturing industry. So, we can offer our customers the highest quality for their components. We also offer competitive prices to remain within your budget.

    Lerner provides a wide variety of high-precision molding processes to create the parts you need. Our manufacturing processes include injection molding, blow molding, compression molding, extrusion molding, rotational molding, and thermoforming. Additionally, we offer custom coloring services for thermoset and thermoplastic processing.

  5. Large Injection Molding Companies

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    Lerner Molded Plastics is a leading provider of injection molding services for larger components. As one of the leading groups of large injection molding companies, Lerner offers each client the highest possible quality for their injection molded parts. Our injection molding capabilities enable us to develop large part injection molded solutions for any industry or application.

    With a state-of-the-art, ISO Certified facility, we deliver high-quality injection molded parts in a wide variety of plastic materials. Lerner also specializes in complex, multi-cavity molds. As a result, we can fulfill requirements for products ranging from small to very large with shot sizes from 3 to 600 ounces. Our facility houses advanced injection molding machines with clamping forces ranging from 30 to 3,000 tons and up to 64 cavities.

    Additionally, Lerner offers injection molding processes for thermoset and thermoplastic materials with custom colors. We are a full-service provider of injection molding services, so we can assist with every stage of the process, from engineering to product development. Furthermore, Lerner offers tooling and mold making as well as finishing, logistical support and supply chain management services.

    With 25+ years of experience as one of the leading large injection molding manufacturers, we can help you create exceptopma; designs to maximize quality and minimize production costs. We also offer a veriety of high-quality plastic materials:

    • High-Density Polyethylene (HDPE)
    • Polypropylene (PP)
    • Polystyrene (PS)
    • Nylon
    • ABS
    • Acetal
    • Polycarbonate (PE)
    • Polyester (PET/PETG)
    • Acrylic

    Lerner has the equipment an resources to help you create the components you need, regardless of your industry or application.

  6. Large Scale Injection Molding

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    Need large custom plastic parts for your next project? Consider large scale injection molding from Lerner Molded Plastics

    Large Scale Injection Molding and Other Services from Lerner Molded Plastics

    Lerner Molded Plastics can accommodate shot sizes from 3 to 600 oz. with clamping forces of 30 to 3,000 tons. Partner with Lerner Molded Plastics for premier mold formation, quality tooling, and reliable supply chain services and finishing operations. From custom colors to the most detailed multi-cavity molds, Lerner Molded Plastics has everything you need. Customers count ont he Lerner team for services including:

    Injection Molding

    Lerner Molded Plastics has a reputation as a top-quality provider of injection molding services for customers in a variety of industries. Their ISO certified, state-of-the-art facility produces injection molded components from a wide range of plastics.

    Blow Molding

    As a provider of blow molding services, Lerner Molded Plastics offers equipment in single or dual head configurations with up to a 40-lb. capacity. Their shuttle press systems are utilized for high-volume production, and their capabilities can accommodate components that feature multiple cavities in various sizes.

    Plastic Extrusions

    Lerner provides quality OEM, automotive, and consumer products. Lerner specializes in manufacturing single, co, and tri-extruded plastic profiles, pipes, and tubes. Applying a combination of materials to meet the requirements of flame-retardant and food-grade applications. Lerner’s facility can accommodate anything from prototypes to high-volume runs.


    Lerner provides precision thermoforming services to a wide variety of industries. They use advanced equipment for thin-gauge, high-production output thermoforming. Rotary machines and single station equipment is used for heavy-gauge thermoforming.

    Rotational Molding

    Rotational molding is a highly desirable option for manufacturing large parts with lower volumes. Lerner provides rotational molding services to customers int he OEM, automotive, and consumer products industries.

    Design and Construction of Tooling

    Lerner Molded Plastics provides mold design services for injection molding, blow molding, rotational molding, thermoforming, and extrusion. Their capabilities include anything from small precision tools to large, single-cavity tools.

    Supply Chain Services

    Lerner offers complete supply chain services, including local sourcing of all raw materials, sub-assembly components, packaging, warehousing of finished products, and direct drop ship capabilities.

    What is Plastic Injection Molding? | Large Scale Injection Molding

    Plastic injection molding refers to the manufacturing process used to produce a large volume of identical parts. With large scale injection molding, manufacturers can produce parts of a variety of sizes and shapes, including small and large part molding. Injection molding is extremely versatile and has several advantages when compared to other plastic molding methods.

    To list, some of the advantage of choosing plastic injection molding over another fabrication method include:

    High Efficiency

    • Fast production when compared to other methods.  
    • High production output rate.

    Complex Part Design

    • Ability to handle complex parts with uniformity 
    • Maximizes precision
    • Quality Consistency

    Flexibility and Customization

    • Large selection of resins 
    • Various coloring systems

    Reduced Waste

    • Recycle excess plastic

    To learn more about large scale injection molding from Lerner Molded Plastics, contact us or request a quote today.

  7. Large Part Molding Specialists

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    Are you looking for large part molding specialists in Northeast Ohio? Lerner Molded Plastics is a leader in Ohio’s leading plastic parts manufacturing companies. We provide our clients with precision, custom plastic injection molding services for the highest quality components. In fact, our plastic molding capabilities give us the ability to develop effective solutions for any application with competitive pricing.

    Our ISO 9001 2015 certified facility provides custom molded plastic parts with various different materials. Also, Lerner Molded Plastics specializes in production with multi-cavity molds. As a result, we can effectively produce high volume small and large parts with shot sizes ranging from 3 to 600 ounces. Furthermore, our full-service manufacturing facility houses state-of-the-art plastic molding machinery with 30 to 3000-ton clamping forces and as many as 64 cavities.

    As the leading large part molding specialists in Ohio, with a series of high tonnage presses for injection molding. We also offer large part rotational molding, blow molding and thermoforming. Lerner offers thermoset and thermoplastic processing with custom coloring capabilities. Most notably, we can help our clients at each step of the plastics manufacturing process from prototyping to production. We also offer mold and tooling design services as well as finishing services, logistical support and supply chain management.

    We have 25+ years of experience as large part molding specialists, so we can help our clients create optimal product designs that offer maximum quality with lower production costs. Lerner also has access to a wide variety of plastic materials:

    • High-Density Polyethylene (HDPE)
    • Polypropylene (PP)
    • Polystyrene (PS)
    • Nylon
    • ABS
    • Acetal
    • Polycarbonate (PE)
    • Polyester (PET / PETG)
    • Acrylic

    Lerner Molded Plastics has the resources, equipment and expertise to help you make the plastic parts you need to fulfill your application requirements.

  8. Large Plastic Parts Manufacturing in Ohio

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    Are you looking for a reliable large plastic parts manufacturer in Ohio? Lerner Molded Plastics can accommodate both small and large part molding. Lerner offers the necessary precision to produce large parts with custom specifications, so our customers always receive the highest quality components. Out molding capabilities also allow us to offer more cost-effective solutions so you remain within your budget.

    Why choose Lerner’s large plastic parts molding specialists?

    Lerner Molded Plastics can efficiently produce multiple parts of varying scales and shot sizes, ranging from 3 to 600 oz. Our manufacturing facility employs advanced plastic molding equipment with high-pressure clamping forces, ranging from 30 to 3,000 tons and up to 64 cavities.

    We are a leading provider of injection molding in Ohio with a series of high-tonnage presses. Lerner Molded Plastics offers a variety of precision services, including rotational molding, blow molding, and thermoforming for small and large plastic parts, so we can create anything you need. We also offer custom coloring options for our thermoset and thermoplastic processing services.

    Injection Molding

    Lerner plastics operates a state-of-the-art, ISO certified facility, accommodating injection molded components from the small to the very large.

    Rotational Molding

    This is a desirable option for manufacturing large plastic parts with lower volumes. Our equipment is capable of molding parts up to 35′ long and a weight of up to 175lbs., with single or multiple cavities.

    Blow Molding

    Lerner’s blow molding capabilities accommodate components of varying sizes, including the very large. We utilize blow molding equipment in single or dial head configurations with up to 40lb. capacity.


    At Lerner, we use advanced in-line equipment for thin-gauge high production output thermoforming and rotary machines and single station equipment for heavy-gauge thermoforming. Our equipment can accommodate components of up to 15′ in length.

    Large Part Plastic Molding Advantages

    Choosing a reputable plastic parts molding specialist will not only result in higher quality products but also reduced production costs. Lerner’s large part plastic molding services offer a variety of advantages:

    • Higher precision and tolerances
    • Lower costs
    • Quick turnaround
    • Diverse material selection
    • Exceptional durability
    • Lightweight components

    About Lerner Molded Plastics

    Regardless of the part you need, we can help you with anything from the initial design phases to final shipments. At Lerner, our plastic part molding specialists have a reputation for consistently providing high-quality products and outstanding customer service.

    We also offer supply chain services and 24/7 drop shipping to your customers’ locations. Our quality assurance programs consist of detailed-oriented documentation, traceability, and compliance with all of your application’s requirements. As a result, you will always receive the components you need with pricing that suits your budget.

    If you’re searching for reputable plastic injection molding companies in Ohio, contact Lerner Molded Plastics today!

  9. Large Part Molding

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    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.

  10. Large Part Injection Molded Plastic Suppliers

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    Get high-quality parts at competitive prices when you partner with the right large part injection molded plastic suppliers

    What is Plastic Injection Molding?

    Injection molding is a manufacturing process generally used for the mass-production of parts. It is an efficient way to produce plastic parts in mass quantities. The shape and size of products achievable through the process of injection molding has evolved over time. When molding large parts, there are several details to consider.

    If you are in search of a provider who can accommodate large plastic parts, you’ll need to take into account some considerations, such as: tolerance, manufacturing method, capabilities of available machinery, cost, as well as any other factors unique to your product(s).

    Is Injection Molding Better Than 3D Printing? | Large Part Injection Molded Plastic Suppliers

    3D printing forms three-dimensional objects through the sequential mechanized layering of build material, usually plastic. As technology has advanced, the additive manufacturing method has revolutionized modern manufacturing.

    For large parts, in particular, you may find you benefit more from injection molding than 3D printing. Depending on the size of the necessary part, you could save significant time and money by opting for plastic injection molding. Large part printing cycles can take up to several hours while injection molding could produce the same part within a matter of seconds.

    Some of the other drawbacks to 3D printing include limitations of volume and uneven surfaces. The size of a 3D printed part depends on the size of your 3D printer. However, with plastic injection molding, you have endless options when it comes to creating molds. In addition, 3D printing gives parts ridged layers that are not always ideal for parts that will do significant moving.

    Large Part Plastic Injection Molding From Lerner Molded Plastics | Large Part Injection Molded Plastic Suppliers

    The Northeast Ohio community of businesses has a distinct history of excellence in the plastic fabrication industry. For almost three decades, Lerner Molded Plastics has continued this legacy. In all, if you and your colleagues have been looking for reliable large part injection molded plastic suppliers, then you can feel confident in teaming up with Lerner Molded Plastics. To list, client businesses count on Lerner Molded Plastics for

    • Injection Molding
    • Blow Molding
    • Extrusion
    • Rotational Molding
    • Thermoforming
    • Both Tool Design and Build
    • Full Supply Chain Services
    • Secondary Services
    • Decoration
    • Pad Printing
    • Post Molded Painting
    • In-Mold Labeling
    • Ultrasonic Welding
    • Both Product Assembly and Packout
    • Electronics Assembly
    • Both Bar Coding and Labeling

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