Case Study: Bimetallic Screw & Barrel for High-Temperature Engineering Plastics
Case Study: Bimetallic Screw & Barrel for High-Temperature Engineering Plastics
Client Industry: Electronic & Automotive Connector Injection Molding
Product: Custom bimetallic injection screw and barrel
Company: Dongguan Jingchuangda Machinery Technology Co., Ltd.
Website: https://www.jcdextruder.com
Project Background
The customer manufactures precision electronic and automotive connectors. They process highly abrasive and corrosive formulations:
Glass fiber reinforced compounds
Halogen-free flame retardant materials
High-temperature engineering plastics: PA46, PA6T, PA9T, PBT, LCP, PPS
Original nitrided screw & barrel suffered rapid abrasion, unstable plasticization, frequent dimensional deviation of finished connectors and high scrap rate. Frequent shutdowns for replacement greatly increased production costs.
Our Solution
Jingchuangda supplied customized bimetallic screw and barrel set:
Centrifugal casting bimetallic barrel with thick wear-resistant alloy liner
Screw flight hardfaced with tungsten carbide alloy
Optimized screw geometry for high-temperature resins; balanced shear to avoid material degradation
Alloy formulation tailored for both abrasive glass fiber and corrosive halogen-free flame retardant additives
Achieved Results After On-site Commissioning
✅ Service life 2–4 times longer than conventional nitrided screw barrel
✅ Stable plasticizing quality; fewer bubbles, burns and black spots on connector products
✅ Consistent melt homogeneity, improved dimensional stability of precision connectors
✅ Extended maintenance cycle, reduced unplanned downtime
✅ Lower overall production cost and better long-term return on investment
Applicable Materials & End Products
Resins: PA46, PA6T, PA9T, PBT, LCP, PPS
Formulation: 15%–65% glass fiber filled, halogen-free flame retardant grades
Typical Products: Automotive high-voltage connectors, electronic precision connectors, sensor housings, terminal blocks
Why Choose Jingchuangda Bimetallic Screw & Barrel
Custom design according to plastic type, filler ratio and injection molding process
Strict concentricity control and precise machining
Multiple wear/corrosion resistant alloy options to match different working conditions
Fit all mainstream injection molding machine brands
Professional after-sales technical support
If you are processing high-temperature, glass-filled or halogen-free flame retardant engineering plastics for connector production, contact us to get a tailored screw & barrel solution.
