Plastic Injection Molding
For over 60 years, American Plastic Products (APP) has been a trusted provider of custom plastic injection molding services. Our full-service capabilities include everything from mold design and manufacturing to point-of-sale assembly, ensuring a seamless production process.
Whether you’re creating new components or replacing worn-out parts, we provide precise, efficient and high-quality solutions tailored to your project needs.
What Is Plastic Injection Molding?
Plastic injection molding is a versatile and efficient manufacturing process that produces plastic components by injecting heated liquid plastic resin into a custom metal mold, where it cools and hardens into the desired shape.
This highly controlled and precise method minimizes waste while allowing for the mass production of durable, interchangeable plastic parts.
Product Dimensions & Machine Capabilities
- Smallest part size: 0.25 inches
- Weight range: .005 – 32 oz.
- Maximum part dimensions: 15 x 15 inches with a depth up to 8 inches (varies by product)
- Machine capacity: 55 to 400 tons
How Plastic Injection Molding Works
All plastic parts begin as thermoplastic pellets, which are melted down into a liquid and funneled into a pressurized nozzle. The molten plastic is then injected into a custom mold, ensuring zero spills, minimal waste and consistent results across all parts.
Once inside the mold, the pressurized plastic fills every detail, preventing air bubbles and delivering uniform quality. As the material cools, it hardens into the exact shape specified by the mold.
Key Process Features
- Mold Design: Each mold consists of two parts – a cavity and a core – and can be fully customized based on project specifications. Most molds are made from steel or aluminum, as they withstand high temperatures.
- Material Options: Choose from virgin plastic resin or recycled plastic based on project needs.
- Precision & Consistency: Hydraulic, electric-powered or hybrid injection ensures even, high-quality results with each production run.
- Temperature Control: Proper heat levels help achieve accurate formation and eliminate inconsistencies, plus increases efficiencies in cycle times.
- Polishing & Finishing: Excess plastic is removed post-production to create a mirror finish or any custom texture.
Standard & Conductive Resins
At American Plastic Products, we partner with you to select the ideal resin for every project. With decades of materials expertise, we ensure each part meets your exact performance, appearance and regulatory requirements.
- Sustainability Options: Environmentally responsible choices are available, including biodegradable resins and recycled-content plastics to support your initiatives.
- Custom Formulations: Whether you need a specialty resin or custom blend for your unique mechanical, thermal or aesthetic properties, we’ll source or develop it.
- Certifications & Compliance: We offer materials that meet FDA, UL, RoHS and other industry-specific standards, ensuring your parts are safe and compliant.
Standard Resins
- ABS
- ABS+Nylon
- ASA
- CoPolyester
- EVA
- GPPS
- Hips
- LCP
- PA6 (Nylon 6)
- PA6 Reinforced
- PA66 (Nylon 66)
- PA66 Reinforced
- PBT
- PBT Reinforced
- PC
- PC Reinforced
- PC/ABS
- PC/PBT
- PP
- PE-HDPE
- PE-LDPE
- PE-LLDPE
- PET Reinforced
- PMMA Acrylic
- POM Acetal
- PPS
- PSU
- SAN
- TPE
- TPU
- TPV
Conductive Resins
- Nano Particle Filled Engineered Resins
- Electrically Conductive
- Thermally Conductive
Benefits of Plastic Injection Molding
Plastic injection molding is the industry-preferred method for high-volume plastic part production due to its efficiency, precision and cost-effectiveness.
Why Choose This Method?
- Precision & Complexity: Advanced CAD and 3D printing technologies allow for highly detailed mold designs.
- Custom Strength & Performance: Customers can specify exact durability and performance requirements.
- Versatile Material Selection: Works with a wide range of thermoplastics for different applications.
- High-Volume Production: Efficiently produces thousands of consistent, high-quality parts.
- Cost-Effective & Energy Efficient: Reduces material waste and lowers production costs compared to other manufacturing methods.
Our Services
At APP, we tailor our plastic injection molding services to meet the unique needs of various industries, including military, medical, manufacturing, automotive and cosmetics. Our capabilities include:
- Low to high-volume production to suit different project needs
- Custom mold development, including testing and prototyping
- Expansive material selection, including all commodity grades such as polypropylene, polyethylene, polystyrene, and engineering grades like ABS, polycarbonate, nylon, and some exotic grades including polysulfide, isoplast and custom filled materials with fiberglass, minerals and stainless steel and olefinic polymers.
- Expansive material selection, including commodity grades (polypropylene, polyethylene, polystyrene), engineering grades (ABS, polycarbonate, nylon) and specialty materials such as polysulfide, isoplast and custom-filled compounds with fiberglass, minerals, stainless steel and olefinic polymers.
- Post-mold assembly services, such as point-of-sale product packaging and sonic welding.
- Custom artwork options, including UV printing, pad printing and hot die stamping.
Looking for a trusted plastic injection molding partner?
Whether you need high-volume production or specialized component manufacturing, American Plastic Products has the expertise and technology to deliver superior results. Contact us today to learn more about how we can support your next project!