Plastic molding can produce parts with flash, excess material that forms on part surfaces. During injection molding, molten plastic may escape through the mold’s parting line. Improper venting, low clamping pressure, low material viscosity, and uneven flow can also cause flash formation. In addition, injection molding flash sometimes occurs after the gate runners are removed. Flash also occurs during compression molding, typically because the material charge was loaded in excess. Other types of plastic molding, such as transfer molding and blow molding, can produce parts with flashing, too. So ..read more

Nitrofreeze® cryogenic deburring removes burrs from PEEK gears without affecting part geometry or surface finish. Unlike other burr removal methods, cryogenic deburring removes only the surface imperfections left behind by machining. The edges on gear teeth are maintained without unwanted rounding, and the Nitrofreeze® process can deburr challenging geometries and hard-to-reach areas. Keep reading to learn more and contact Nitrofreeze® when you’re ready to discuss your application. PEEK Gears and Burrs Polyether ether ketone (PEEK) is an engineering thermoplastic with excellent mechanical prop ..read more

Nitrofreeze® cryogenic deflashing removes flash from injection-molded PPS parts without affecting critical dimensions or surface finish. This proven process removes gate vestiges, flash that extends from the surface of an injection-molded part after gate runners are removed. Cryogenic deflashing also removes flash from hard-to-reach areas such as cross-holes, blind holes, and other challenging part geometries. Most importantly, this cost-effective process is also quick and consistent. Injection Molded PPS Parts Injection-molded polyphenylene sulfide (PPS) combines exceptional mechanical streng ..read more

Medical plastics machining can produce complex parts with excellent dimensional stability. During CNC machining operations, however, milling and drilling can stretch part surfaces. If the workpiece material contains a crack, this stretching may cause the crack to grow and fracture. This creates burrs, raised areas that can interfere with part seating, sealing, or assembly. Nitrofreeze® cryogenic deburring can remove burrs without affecting the part geometry or surface finish that medial plastics machining achieves. Our patented process is especially effective at removing burrs from blind holes ..read more

Medical plastic injection molding can produce high volumes of tight-tolerance parts for medical devices and equipment. During the injection molding process, however, excess material known as flash can form on the surfaces of parts. Cryogenic deflashing can safely, cleanly, and cost-effectively remove this unwanted plastic flash without affecting critical part tolerances. There are many other benefits as well. Nitrofreeze® Cryogenic Solutions of Worcester, Massachusetts (USA) provides cryogenic deflashing services to plastic injection molders and medical device manufacturers. Our patented proce ..read more

Nitrofreeze® cryogenic deflashing removes mold flash from parts produced using silicone overmolding, a multi-step process that molds silicone rubber over parts made from another material. Examples include medical devices where silicone is molded over metal to provide protection against water, heat, impact, and electrical shock. Silicone can also be molded over plastic during two-shot molding. Silicone Overmolding and Part Deflashing     Silicone overmolding can use either liquid silicone rubber (LSR) or silicone high-consistency rubber (HCR). LSR overmolding applications include ..read more

Nitrofreeze® Cryogenic Solutions is ITAR registered and NIST 800-171 certified. If your company is part of the defense supply chain, or if you work in related industries such as aerospace, you may be required to use vendors with these designations. When you work with Nitrofreeze®, you can be confident we’ll safeguard your project information while offering the cryogenic services you need. Examples include: Cryogenic deburring for efficiently removing burrs from machined plastic and metal parts. Cryogenic deflashing for safely removing mold flash from plastic and rubber parts. Dry ice blasting ..read more

Nitrofreeze® cryogenic deflashing for insert molding gently removes flash from parts and products like electrical connectors and surgical tools. During insert molding, a plastic or rubber material is molded over a substrate that has been inserted into the mold. In the case of an electrical connector, this substrate is an electrically conductive metal. The plastic or rubber provides electrical insulation, and the molding process combines multiple materials to form a single part without the need for secondary assembly. Mold Flash and Electrical Connectors With overmolded electrical connectors, i ..read more

How much are you paying to deburr plastic or metal parts by hand? Could you save money with Nitrofreeze® cryogenic deburring, a computer-controlled, automated batch process that’s clean, consistent, and cost-effective? Before you break out your calculator, consider the true costs of manual deburring. There’s a basic formula for deburring costs, but there are also considerations that are harder to quantify. Deburring Labor Costs This is the basic formula for determining how much it costs to deburr a part by hand. Employee’s Hourly Pay + Benefits / Number of Pieces Deburring per Hour = Labor Cos ..read more

Molded medical parts have tight tolerances, require a high degree of cleanliness, and are made from a range of materials, including specialty polymers and elastomers that cost more than commodity rubber and plastic. Whether parts manufacturing involves injection, compression, or transfer molding, designers need to know that the components they receive are free from defects that could jeopardize quality or compliance. This includes samples for first article inspection (FAI) and high-volume production runs. Flash, a type of molding defect, affects the surface finish of parts and can interfere wi ..read more