Jingma Coaster-Style Folding Door

The Jingma Coaster-Style Folding Door is a robust and precision-engineered exterior door assembly designed for Coaster-type and mid-size passenger buses. Manufactured from high-quality cold-rolled steel sheets, this folding door is developed to meet industry standards and customer requirements for structural strength, durability, and long-term operational reliability.

The inner and outer panels are formed through dedicated stamping molds and processed using 3D laser cutting according to detailed technical drawings, ensuring excellent dimensional accuracy. The panels and reinforcement components are then integrally welded and hemmed, creating a strong and stable folding door structure suitable for frequent opening and closing in daily bus operations.

Product Features

• High Structural Strength:
  The folding door structure integrates inner panels, outer panels, and reinforcement parts through precision welding and edge hemming, ensuring excellent rigidity and durability under repeated use.

• Advanced Anti-Corrosion Protection:
  Both the interior and exterior surfaces are treated with an electrophoretic coating. The product passes 72+ hours of salt spray testing, significantly improving resistance to rust and corrosion while providing a solid foundation for subsequent painting processes.

• Precision Manufacturing:
  Mold stamping combined with 3D laser cutting ensures accurate dimensions, smooth edges, and consistent quality, enabling reliable installation and smooth door operation.

Quality Standards

• Key Process Capability Index: Stable and controlled

• Customer Satisfaction Rate: ≥ 95%, with an annual increase of 1%

• Process Audit Level: Grade B

• Inspection Pass Rate: ≥ 98% per batch

These standards ensure consistent quality, safety, and long service life.

Functional Configuration

• Hinge Options: 3-hole or 4-hole hinge configurations available to meet different installation and structural requirements

Application Range

This folding door is suitable for Jiangling Jingma Coaster bus models with the following lengths:

• 6.0 meters

• 7.1 meters

• 7.7 meters

It is widely used in city commuter buses, tourist coaches, and school bus manufacturing and replacement applications.

Notes & Handling Instructions

• Customers must confirm the product condition before shipment.

• Avoid heavy pressure during transportation to prevent deformation.

• Packaging must be firm and secure to ensure safe delivery.

Competitive Advantages

• Factory-Direct Supply: Direct manufacturer pricing with no intermediaries

• Stable Long-Term Cooperation: Partnerships with well-known domestic bus manufacturers such as Xiamen King Long, Ankai Bus, and Jiangling Jingma

• Quality & Delivery Assurance: Mature production management ensures consistent quality and on-time delivery

Conclusion

The Jingma Coaster-Style Folding Door provides a reliable, durable, and cost-effective solution for Coaster bus manufacturers and aftermarket customers. With cold-rolled steel construction, advanced electrophoretic anti-corrosion treatment, and strict quality control standards, the product delivers excellent strength, corrosion resistance, and operational stability. Supported by factory-direct supply and proven cooperation with leading bus brands, it is an ideal choice for high-quality folding door systems in passenger buses.