Yet another concern with recycled materials for injection molding is the popular use of post-consumer scrap. Some recycled plastics carry chemicals absorbed from their former containers, such as those for lawn care or pest control. The recycled material can then introduce these chemicals into the new product.

Fixing such contamination typically calls for downtime by requiring either that the mold be removed from the press or the press be shut down to clean the part and clear the foreign material. The cost for this correction ranges from $500 to $3,000 or more.

In one instance, HQC was filling a mold with material that included plastic from recycled battery cases. The material had been extruded, filtered and pelletized, but enough battery acid remained to complicate the injection process. As the pellets were pushed in, heated and melted on our end, the hot, acidic gases that escaped through the mold vents began etching the molds, which allowed them to start rusting.

HQC then receives the pellets for the current closure or fitment project, which will involve re-melting them and injecting fixed quantities of the plastic at a high pressure into a mold. The problem on our end is that as we’re melting the pellets compromised by the recycled plastics, the mixed material may not pass through certain gates that allow the plastic into the mold; our gates have different openings from the facility’s screens.

Quality assurance is a cornerstone of our operations at Minco Group. We implement rigorous quality control processes throughout the manufacturing cycle, including product qualification and testing. Our commitment to excellence ensures that all molded products meet or exceed customer expectations.

To obtain a quote, potential clients can reach out to Minco Group through our website or contact us directly. We typically require details about the project, including design specifications, material preferences, and production volumes. Our team will review the information and provide a comprehensive quote tailored to your needs.

Yes, Minco Group provides custom tooling solutions tailored to the specific requirements of each project. Our experienced team designs and manufactures molds that are optimized for efficiency and precision, ensuring that the final products meet the desired specifications and quality standards.

HQC’s injection-molding specialists can serve and advise you in the vital areas of injection molding with recycled materials. The results favor businesses, consumers and environmentalists alike.

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Similarly, some recycled plastics may contain bits of metal, which doesn’t melt as plastic does. When the melted plastic is pushed into the mold, those bits can plug our gates, forcing an uneven flow or, worse yet, restricting the flow. Both scenarios can impair the molded part’s quality. Either the part will be incomplete or it will lack the proper density, which can later cause product problems or failures.

Using recycled materials in plastics remains a focus of protecting resources and the environment. However, although recycled plastic benefits applications in different sectors, including it for injection molding can create manufacturing and product-quality challenges.

Before HQC uses recycled plastic for injection molding, it is first extruded at another facility. During the extrusion process, the material is fed into a heated cylinder where a rotating auger pushes the melting plastic through a screen. Once the molten form cools, it is cut into recycled plastic pellets.

Beyond recycling-related costs, injection molding further contends with recycled plastics’ differing properties and melting points, which can cause cross-contamination, procedural complications and variations affecting part quality.

As specialists in sustainable injection molding, HQC offers customers extensive knowledge of working with recycled material in plastics. Because of our hands-on experience, we’re familiar with how recycled materials may be friendlier to the environment than to injection molding.

Pellets for injection molding of a polypropylene plastic closure or fitment might include recycled material with both polypropylene and polyethylene terephthalate (PET) from the extrusion. This is because polypropylene melts at 450°F and PET at 475°F. As the recycled material is processed at the facility, one might assume the melting-point difference would allow the polypropylene to go through the heated-cylinder screen at 450°F but not the PET.

Yes, Minco Group offers comprehensive product design services. Our team collaborates closely with clients to develop innovative designs that meet their specific needs. We utilize advanced software and techniques to ensure that the designs are optimized for manufacturability and functionality.

This often proves to not be the case. While the melting polypropylene passes the sitting PET, it creates a shear heat with it, melting the PET enough to force it through the screen and cross-contaminate the product.

A first hurdle in U.S. recycling is that our nation is still maturing in its practice of it. Other countries are more diligent in gathering and recycling sustainable materials. They also have lower costs and stricter standards for recycling programs. The greater expense of U.S. recycling appears in product and material pricing, including for injection molding.

Minco Group serves a diverse range of industries, including automotive, consumer goods, medical devices, and electronics. Our extensive experience allows us to tailor our services to meet the unique requirements of each sector, ensuring compliance with industry standards and regulations.

Minco Group specializes in injection molding services, which include the design, manufacturing, and qualification of molds for various plastic parts. Our expertise covers the entire process from product design to precision machining, ensuring high-quality outcomes for our clients.