Crane Configurations for Mold Manufacturing
Die manufacturing (stamping dies 1–20 t/set, injection molds 200 kg–10 t, die-casting dies 500 kg–8 t, forging dies 1–30 t) is a high-precision heavy machining application. Recommended setup: QD double-girder crane 10–30 t with tilting spreader + LD single-girder crane 5–10 t + KBK 2 t with digital hook scale. Kelude's die-handling solutions deliver full-range high-precision micro-motion control.
Die manufacturing (stamping, injection molding, die-casting, and forging) involves heavy individual workpieces (1–30 t), extremely tight machining tolerances (±0.005 mm), and high unit value (USD 7,400–296,600 per die set). Any impact or deformation during handling translates directly into costly rework or scrap.
Stamping Die Machining: Milling & Assembly of Large Steel Plates and Castings
Stamping dies (1–20 t per set) follow this process flow: rough milling of steel plate/casting blanks → heat treatment → finish milling → spotting and assembly. Blanks and semi-finished components require multiple transfers between workstations (10–50 minutes per move). A single impact on the die parting surface (±0.005 mm tolerance) can trigger an expensive rework cycle.
Recommended model: QD-type double-girder bridge crane, 10–20 t capacity / 16–22 m span, fitted with a tilting spreader (10 t capacity, manual or electric rotation ±180°) for die spotting and flipping. A digital hook scale (accuracy ±1 kg) provides real-time load monitoring. Variable frequency speed control on hoisting (creep speed ≤0.5 m/min) enables precision alignment.
Price reference: QD double-girder 10 t / 18 m span: approx. USD 17,800–29,700 per unit; tilting spreader: approx. USD 1,500–4,400 per set. Kelude's stamping die solution includes a digital hook scale and polyurethane protective pads.
2. Injection Mold Machining – Precision Machining of Mold Bases and Cavities
Injection molds (200 kg to 10 t) consist of a mold base (standard or custom), cavity inserts, and an ejection system. The mold base moves between machining centers, grinders, and EDM machines, and each transfer must protect the cavity surface from impact. The cavity surface finish is mirror-grade, with a roughness of Ra ≤ 0.1 μm.
Recommended model: LD single-girder electric overhead crane, 3–5 t capacity with a 10–15 m span, covering the mold base machining area. Equipped with a nylon lifting sling (80 mm wide) and a cavity protective cover (3D-printed polyurethane blocks contoured to the cavity shape).
Price reference: LD single-girder crane, 3 t / 12 m span: approx. $44,500–$89,000 per unit; custom protective covers: approx. $4,500–$11,900 per set. Kelude Heavy Industry's injection mold solution includes 3D-printed cavity protection blocks.
3. Die-Casting Dies – Handling Hot-Work Tool Steel
Die-casting dies (500 kg to 8 t) are made of hot-work tool steels such as H13 or 8407, with a hardness of HRC 42–48. These dies contain cooling channels and ejector pin holes; tilting during handling can cause residual water to leak out, creating a rust risk. Die-casting dies require frequent maintenance (every 5,000–10,000 cycles).
Recommended model: KBK flexible modular crane, 2 t capacity, covering the die-casting die maintenance area, fitted with a stainless steel chain and a corrosion-resistant hoist (due to high workshop humidity). The maintenance area includes a turnover stand (3 t load capacity, hydraulic tilting ±90°) for easy core removal and assembly.
Price reference: KBK system, 2 t: approx. $59,300–$118,600 per set; turnover stand: approx. $29,700–$59,300 per unit. Kelude Heavy Industry's die-casting die solution includes a stainless steel KBK system with rust protection.
4. Forging Dies – Large Die Block Forging and Heat Treatment
Forging dies (1–30 t per set) are made of large forged steel blocks (5CrNiMo/5CrMnMo, etc.), with blank weights reaching 30 t and above. The forging heat treatment process (quenching + tempering) requires lifting at high temperatures (850–1050°C), so the crane must be high-temperature resistant.
Recommended model: QD double-girder bridge crane, 20–30 t capacity with an 18–24 m span, fitted with a high-temperature-resistant configuration (Class H insulated motor rated for 180°C, wire rope rated for 300°C). Die quenching uses a dedicated quenching spreader (C-hook with automatic hook release mechanism).
Price reference: QD double-girder crane, 20 t / 20 m span: approx. $267,000–$445,000 per unit; high-temperature-resistant upgrade: approx. 20% surcharge. Kelude Heavy Industry's forging die solution includes high-temperature-resistant components and automatic hook release for quenching.
Die Manufacturing Crane Configuration Comparison
| die Type | recommended model | tonnage | Accuracy/Protection | reference price |
|---|---|---|---|---|
| Stamping Die | QD+Tilting spreader | 10~20t | ±0.005mm Micro-motion | 12~2310K |
| Injection Mold | LD+nylon sling | 3~5t | Ra≤0.1μm Protection | 3~610K |
| Die Casting Mold | KBK+Tilting Frame | 2t | Stainless Steel Rust Prevention | 4~1210K |
| Forging Stamping Die | QDHigh Temperature Resistant | 20~30t | HGradeinsulation/300°C | 18~3010K |
Key Parameters for Die Manufacturing
Service Advantages for Die Manufacturing
Kelude Heavy Industry has been deeply involved in the die and mold manufacturing sector for years, backed by a 50,000 m² production facility and an ISO 9001 Quality Management System certification. We deliver high-precision micro-motion crane solutions tailored to stamping, injection, die-casting, and forging die applications.
Precision Micro-Motion System
Core configuration: QD variable-frequency drive (VFD) + tilting spreader + cavity protective cover + digital hook scale. Covers all die types — stamping, injection, die-casting, and forging.
High-Value Die Protection
Standard equipment includes a digital hook scale (accuracy ±1 kg), polyurethane protective pads, 3D-printed cavity protection blocks, and a stainless steel anti-corrosion hoist — safeguarding dies valued between $7,400 and $296,600 per set.
Production & Material Flow Planning
We provide complete workshop layout planning — crane type and tonnage for each process station, tilting positions, and buffer zones in front of CNC machines — minimizing die handling and transfer time.
FAQ — Die Handling & Protection
Q: How does the tilting spreader work during stamping die spotting?
A: Stamping die spotting (checking clearance between upper and lower die halves) requires rotating the upper die 180°. The tilting spreader (load capacity 10t) works as follows: ① Two lifting points on the spreader attach to both sides of the upper die; ② A manual or electric rotation handwheel turns the spreader cross beam (speed 0.5 rpm); ③ The upper die rotates 180° to a vertical position; ④ The spotting technician inspects the parting line, then rotates it back. Note: due to the shifting center of gravity during tilting, a balancer with adjustable lifting points is recommended. Kelude tilting spreaders come standard with center-of-gravity calibration and overload protection.
Q: How do you protect injection mold cavity surfaces during handling?
A: Cavity surface protection (mirror finish Ra≤0.1μm): ① After rough machining — apply anti-rust oil and cover with 0.05mm PE protective film; ② After finish machining — 3D-scan the cavity geometry and 3D-print a polyurethane protection block (Shore hardness A40) that conforms to the cavity, secured with rubber bands; ③ During transport — protective block plus shock-proof foam packaging. Kelude offers a one-stop service covering 3D scanning and printed protection blocks.
Q: How does the lifting spreader automatically release the load during die quenching?
A: During die quenching (heating to 850–1050°C followed by rapid cooling in an oil or water quench tank), the spreader and die must separate quickly at elevated temperatures. The automatic hook release mechanism works as follows: ① The C-hook spreader's gripping jaws are held closed by compression springs; ② Once the die enters the quench medium, the jaws contact the tank bottom, compressing the springs and opening the jaws so the die slides free of the C-Hook; ③ As the crane lifts the spreader, the jaws automatically reset. The entire release takes ≤1 second, preventing the spreader from lingering in the quench bath. Kelude's quenching spreaders come standard with high-temperature-resistant springs (Inconel X750, rated for 800°C).
Q: How do you prevent corrosion in die cooling channels during storage?
A: Cooling channels in die-casting dies (8–16 mm diameter, 500–2000 mm deep) are prone to rust (corrosion blocking the channels) caused by residual water left inside during storage. Recommended measures: ① Purge the channels with compressed air (0.6 MPa) for 1 minute after machining; ② Before storage, fill the channels completely with a water-based rust inhibitor (5% concentration) and seal both ends with plugs; ③ During monthly inspection, check and replace the rust inhibitor every 3 months. Kelude die-casting die solutions include a pneumatic purge joint and rust inhibitor filling pump.
