Manufacturing Capabilities

From Raw Material to Finished Casting – Complete In-house Manufacturing

At BOPENG Steel Casting, quality is built into every stage of production. With decades of casting experience, advanced manufacturing facilities, and a skilled workforce, we provide a complete in-house production system covering pattern making, molding, melting, pouring, heat treatment, machining, inspection, and final delivery.
By controlling every critical process internally, we ensure stable quality, shorter lead times, and reliable performance for every cast steel component.

Wooden Pattern Workshop

Wood patterns serve as the foundation of casting quality and dimensional accuracy.
BOPENG owns a dedicated pattern-making team capable of independently completing customized wood pattern design, manufacturing, repair, and maintenance. This in-house capability reduces outsourcing costs and communication delays while significantly shortening production cycles.
Our experienced pattern makers possess extensive expertise in large and complex casting patterns, ensuring excellent dimensional accuracy and process reliability.

Advantages

In-house pattern manufacturing

Faster production lead times

Lower overall manufacturing costs

High dimensional accuracy

Two dedicated pattern warehouses for long-term customer pattern storage

Molding Workshop

The molding process directly affects casting dimensions, surface finish, and internal quality. BOPENG operates: – 8 professional molding pits.
– 8 medium and heavy-duty overhead cranes.
– More than 80 skilled molding technicians with over 10 years of experience. Our dedicated process engineers provide on-site supervision throughout production to ensure every molding operation strictly follows technical requirements and quality standards.

Molding Technologies

Sodium Silicate Sand Process

Provides excellent mold strength, dimensional stability, and suitability for large steel castings.

South African Chromite Sand

Applied in critical casting areas and hot spots to: Prevent sand burn-on, Reduce penetration defects, Improve casting surface quality, Enhance internal soundness.

Steel Melting Workshop

The quality of molten steel determines the performance of the final casting.
BOPENG strictly controls the entire melting process to ensure stable chemical composition and mechanical properties.

Melting Control

– Precise control of alloy composition.
– Strict sulfur (S) and phosphorus (P) limitation.
– Stable chemical analysis.
– Uniform mechanical properties.
By minimizing harmful elements, we significantly improve casting strength, toughness, and service life.

Advanced Pouring Technology

Before pouring, mold cavities undergo specialized treatment to reduce secondary oxidation of molten steel.
Benefits include:
– Improved internal quality. – Higher casting density.
– Reduced inclusions. – Lower defect rates.
Better mechanical performance.

Heat Treatment Workshop

Heat treatment is essential for achieving required mechanical properties.
Our workshop utilizes intelligent temperature-controlled furnace systems capable of performing: Heat Treatment Processes: – Annealing – Normalizing
– Tempering – Stress Relieving The high-precision control system ensures uniform heating and cooling, optimizing microstructure and mechanical performance. Benefits: Improved toughness, Enhanced strength, Better wear resistance, Reduced internal stress, Stable performance.

Finishing & Grinding Workshop

After casting and heat treatment, each product undergoes comprehensive finishing operations.
BOPENG employs over 70 experienced grinding and finishing workers who efficiently remove risers, gates, burrs, and surface imperfections. Capabilities: – Surface cleaning – Defect removal
– Dimensional correction – Weld repair when required
– Final finishing preparation This ensures every casting meets appearance and dimensional requirements before machining.

Machining Workshop

To provide finished or semi-finished components, BOPENG is equipped with large-scale CNC machining equipment.

Main Equipment

CNC Vertical Lathe – Φ10m
CNC Vertical Lathe – Φ8m
CNC Vertical Lathe – 2 × Φ6.3m
Boring Machine – 160 Type
Gear Hobbing Machine – 3 × Φ8m
Boring Machine – 4 × 10m
These machines enable us to manufacture large, heavy-duty cast components with high precision.

Machining Services

Turning

Boring

Milling

Gear Hobbing

Drilling

Precision Finishing

Shot Blasting Workshop

BOPENG utilizes a fully automatic shot blasting system capable of processing up to 70 tons per batch.
Features: – Shot size: 1–2.5 mm
– Capacity: 70 tons per cycle
– Fully automated operation Benefits: – Removes scale and residual sand
– Improves surface cleanliness
– Enhances coating adhesion
– Reduces finishing time
– Improves appearance quality

FAQ

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