FEEDSCREWS FOR INJECTION MOLDING AND EXTRUSION
You know you are going with the best when you buy an injection molding screw or extrusion screw from Concor Tool and Machine. Information on our wide range of premium designs and material options may be found on this page.
An optimal injection molding or extrusion process depends on the injection molding screw or extruder screw design, and the quality of manufacturing the screw. It cannot be overstated that the injection molding screw design and quality is critical to your success. Our designers, engineers and machinists understand what it takes to design and manufacture extrusion and injection molding screws that perform best for our customers. Concor manufactures barrier screws, mixing screws, general purpose screws, volume reduction screws, and more. Concor's quality standards exceed those of the SPI.
Injection molding screws and extrusion screws from Concor are built for consistent end-product quality, along with high performance and wear resistance.
DESIGN: Properly engineered flight profiles on your injection molding screw or extruder screw not only optimize processing, but can reduce the effects of wear on screw/barrel components. We are continually researching new screw and barrel materials that would best fit our customer’s needs in providing high wear resistance against abrasive, corrosive and adhesive wear. Optimizing performance improves processing and will extending the life of the screw and the barrel. Improved output, better mixing, and critical melt quality can all be achieved through proper screw design. Crystaline and amorphous material process differently so the designs are different for each. Different barrier screw designs and various mixers are available from Concor and are selected to achieve desired outcomes. Concor engineers work with our customers to provide the best possible design based on customer requirements, including documented inspections, complete upsize, downsize and thermoset conversions.
Saxton Mixer
Concor barrier screw with spiral maddock mixer
Thread-on Extruder Mixing Ends
Concor manufactures and rebuilds a multitude of both simple and very complex mixing sections for injection molding feed screws and extruder screws, selected for your material and application. Please contact us for analysis and advice on mixing section materials and design for your application.
Custom mixing section for a large extruder.
DURACON DESIGN: The Duracon injection molding screw is designed to be the most durable screw available, combining innovative geometry, dimension, and alloy type to extend wear life of the screw and barrel. Key design elements optimize the Duracon screw for running in a very wide range of processing environments and a broad range of resin types. Incorporating unique flight geometry with forgiving feed and transition sections, the Duracon screw will significantly increase the wear life, extending the high part quality production cycle.
Concor "Duracon" Feedscrew
SOLIDSTAR DESIGN: The SolidStar solids conveying screw is Concor Tool’s answer to the toughest abrasive wear issues facing molders today. The Solidstar has been proven to extend screw life from days to months and from months to years. The SolidStar patented profile geometry is the key to competitive, successful molding of all of the super abrasive fillers including silica, carbide, metal and mineral materials. All of this priced comparable to any standard through hardened tool steel screw. Concor Tool quality, thirty plus years of innovative feedscrew design and component base metal research came together to create the SolidStar.
A tiny Concor Solidstar feedscrew illustrates the precise manufacturing capabilities we utilize in every part we make.
TOOL STEEL EXPERTS: Nobody knows through hardened tool steel injection molding screws better than Concor Tool. Concor pioneered the use of Crucible’s CPM materials in the 1980’s. PM-alloy screws exhibit excellent wear resistance over conventional tool steels. We have used a host of other tool steel materials including European steels, always exploring the best applications. Critical to the research is the ability to rebuild those materials. Concor has been rebuilding CPM 9V screw since 1992 – something unheard of in the Plastics Industry.
HARDFACING: Concor has invested in Plasma Transfer Arc welding technology allowing us to deposit a full range of alloys including Colmonoy 83. Different hardfacing materials are available. We can discuss the benefits and draw backs with you to help select the correct material and to determine if hardfacing is a good idea for your application.
Click here for a reference chart of properties of screw hardfacing materials
COATINGS AND TREATMENTS: Chrome plating and ion nitriding are the most common screw surface treatments. TiN coating and nickel plating are sometimes used but only in special applications. Carbide coating of the flight tops or encaplulation of the entire flighted length can add additional wear protection. The carbide can be applied in different thicknesses and be polished to different RMS finishes depending on customer requirements. Each combination has a different price structure. The thickness of the carbide can be up to .010/side.
Click here for a reference chart of properties of screw hardfacing materials
COATINGS AND TREATMENTS: Chrome plating and ion nitriding are the most common screw surface treatments. TiN coating and nickel plating are sometimes used but only in special applications. Carbide coating of the flight tops or encaplulation of the entire flighted length can add additional wear protection. The carbide can be applied in different thicknesses and be polished to different RMS finishes depending on customer requirements. Each combination has a different price structure. The thickness of the carbide can be up to .010/side.
FULL RANGE OF SIZES AND DESIGNS
Custom designed and built nitrided feedscrew.
