Ningbo Konger Machinery PET dedicated injection molding machines are high-efficiency precision molding equipment specially developed for transparent and translucent PET products such as mahjong table covers and desktop decorative parts. Featuring short cycle time, superior stability and high transparency, it resolves common PET molding issues including yellowing, internal stress and long cycle duration, delivering efficient mass production solutions for large thin-walled products like mahjong table covers.

Industry Application: PET Injection Molding for Mahjong Table Covers
As frequently used desktop accessories, mahjong table covers impose strict requirements on materials and molding processes.

- Material Properties: PET boasts high transparency, high strength, impact resistance and non-toxic environmental performance, making it an ideal choice for table covers. It demands stringent control over plasticizing temperature, injection speed and cooling process.
- Production Difficulties: Large coverage area and uneven wall thickness easily cause flow marks, silver streaks, uneven haze and warpage. Conventional machines suffer long cycle time and fail to meet mass production demands.
- Core Requirements: Stable plasticization control, even cavity filling and rapid cooling molding, ensuring high transparency, flatness and dimensional stability.

Tailored to production difficulties of mahjong table covers, Konger PET dedicated series achieves profound optimization on plasticizing system, injection system and clamping structure to realize high-yield production with shorter cycles.

Core Advantages for Mahjong Table Cover Production
Specialized PET Plasticizing System Avoids Yellowing and Uneven Haze
Equipped with low-shear high-efficiency customized screw with optimized length-diameter ratio, it cuts shear heat of PET melt, prevents thermal degradation and yellowing, and maintains superior product transparency.
Precise segmented temperature control keeps barrel temperature error within ±1℃, matching PET plasticizing process window and reducing silver streaks, air bubbles and dark spots.
Anti-residence barrel design shortens melt retention time, lowers internal stress and prevents later deformation and cracking.

High-speed High-pressure Injection System Ensures Even Filling of Large Thin-walled Parts
High-response servo injection system enables accurate adjustment of injection speed and pressure, achieving fast and uniform filling for large thin-walled covers and eliminating flow marks, short shots and weld lines.
Closed-loop pressure feedback minimizes pressure fluctuation, guarantees consistent weight and dimension among batches, and improves flatness and assembly precision.
Special nozzle structure reduces melt pressure drop and stabilizes nozzle temperature to avoid cold material defects.

High-rigidity Clamping Structure Supports Stable Production of Large Molds
Reinforced high-strength platens and optimized linkage deliver even clamping force distribution, suitable for large-size molds without deformation or flash during long-term operation.
Low-pressure mold protection system detects foreign objects inside cavities to protect expensive molds and cut maintenance costs.
Fast mold opening-closing and high-efficiency ejection cooperate with rapid cooling property of PET, greatly shortening molding cycle and boosting production efficiency.

Energy-saving Design Cuts Mass Production Costs
Servo energy-saving drive reduces power consumption by 25%-40% compared with traditional hydraulic machines, lowering long-term electricity expenditure.
Modular oil circuit lessens hydraulic impact, securing stable operation, low failure rate and long maintenance interval for continuous production.
Intelligent control system supports one-click saving of multiple mold parameters for fast mold switching and flexible production of covers in various sizes.

Typical Application Scenarios
- Transparent & translucent covers for automatic mahjong tables
- PET decorative panels and protective covers
- Other large thin-walled transparent and translucent PET molded parts

Why Choose Konger PET Dedicated Series?
With years of expertise in PET molding technology, Konger dedicated machines have gained verified reliability among numerous mahjong accessory manufacturers. We provide one-stop technical services covering equipment customization, mold matching and process commissioning, helping clients achieve low-cost, high-yield and short-cycle mass production and expand market competitiveness.