Jumeite offer comprehensive injection molding services focused on high-volume production and strict quality control. Our process begins with scientific molding principles, utilizing rigorous Design of Experiments (DOE) to establish optimal processing windows. We specialize in molding engineering plastics, including ABS, PC, POM, and PA, ensuring material integrity and dimensional stability.
Equipped with advanced servo-hydraulic machines ranging from 50 to 1000 tons, we utilize real-time cavity pressure monitoring to maintain consistency. Our quality management system ensures that every part meets critical specifications, with a standard capability to maintain process capability indices above 1.33. From initial prototyping to mass production and assembly, we deliver durable, high-precision components tailored to the demanding standards of the automotive, consumer electronics, and healthcare sectors.?
Injection Molding Machine
Injection Molding Machine
Injection Molding in Progress
Multi-cavity Plastic Mold
Multi-cavity Plastic Mold
Multi-cavity Plastic Mold
TIPS
Injection Molding Best Practices
The core of successful injection molding lies in the precise synergy of "Material-Mold-Process." Pre-production preparation is paramount; rigorous drying of hygroscopic materials¡ªsuch as drying PC at 120¡ãC for over 4 hours¡ªis essential to prevent defects like silver streaks and air bubbles. Process debugging should follow a logical sequence of "Temperature, then Pressure, then Speed." Barrel temperatures must be tailored to material properties (e.g., 270-290¡ãC for PA66) to prevent degradation. Injection pressure should balance cavity filling with flash prevention, starting at median values. Injection speed requires multi-stage control: high speed (¡Ý100mm/s) for thin walls to prevent cold slugs, and low speed for thick sections to avoid air traps.
Holding pressure and cooling are the decisive factors for dimensional stability. Holding pressure is typically set at 50-80% of injection pressure, with duration determined by "weight study" until gate freeze. Cooling time must ensure the part's core temperature drops below 50¡ãC to prevent warpage from uneven cooling. Production requires patrol inspections every 2 hours to monitor cavity pressure and weight deviation (controlled within ¡À0.2g). For heat-sensitive materials like PVC, controlling the screw-barrel clearance (¡Ü0.12mm) and reducing back pressure (0.5-1.0MPa) minimizes decomposition. Ultimately, success is achieved through parameter coupling optimization to shorten cycle times while ensuring high-quality mass production.
