Continuous Mesh Belt Powder Metallurgy Sintering Furnace｜Technical Specification

1. Equipment Overview

1.1 Equipment Name & Model

Equipment Name: Continuous Mesh Belt Powder Metallurgy Sintering Furnace

Model: RCW-150-10

Powder Metallurgy Sintering Furnace is a dedicated continuous atmosphere heat treatment equipment for powder metallurgy compacts. It combines degreasing, preheating, high-temperature sintering and sealed slow cooling into one automatic production line, transforming loose metal powder blanks into high-density, high-strength and bright finished metal components.

Widely applicable for iron-based, copper-based, stainless steel and alloy PM parts, this continuous sintering line solves the defects of unstable batch quality, low efficiency and high defective rate of intermittent furnaces, serving as standard equipment for modern powder metallurgy mass production.

1.2 Equipment Dimensions & Layout

To meet continuous mass-production heat treatment requirements for powder metallurgy parts, this customized sintering line adopts a multi-zone segmented structure. The total effective length is approximately 17.5 meters, consisting of:

1. Front feeding platform: 2.0 m

2. Preheating zone: 3.0 m (4 heating zones)

3. High-temperature sintering zone: 6.0 m (7 heating zones)

4. Water cooling jacket section: 5.0 m (3 segmented cooling structures)

5. Rear elbow discharging platform: 1.5 m

Effective mesh belt width: 400 mm

1.3 General Description & Working Principle

This fully automatic continuous sintering furnace is engineered with imported core technologies and international manufacturing standards. All critical components adopt premium imported materials, with final assembly and testing completed domestically to achieve performance equivalent to top-tier imported industrial furnaces.

The complete production line integrates a split-type heating furnace body, sealed water cooling system, variable-speed transmission system, intelligent electrical control system, and supporting ammonia cracking atmosphere equipment.

The furnace is equipped with a high-temperature resistant stainless steel muffle tube running through the entire heating and cooling chamber. A continuous stainless steel mesh belt transports pressed powder metallurgy workpieces steadily through preheating, high-temperature sintering, and sealed cooling stages. Under a stable hydrogen-nitrogen protective atmosphere, workpieces undergo oxidation-free sintering with uniform heating, minimal deformation, and consistent dimensional stability.

This equipment is widely applied for bright sintering and annealing of iron-based, copper-based powder metallurgy components, magnetic materials, copper alloy parts, and precision stainless steel hardware including tableware, cutlery, and medical-grade stainless steel products.

2. Core Structural Advantages

1. High-efficiency thermal insulation: Advanced full-fiber lining structure greatly reduces heat loss, lowering power consumption and operational costs.

2. User-friendly operation: Simplified loading/unloading design with fully automatic running ensures easy daily operation.

3. Maintainable split structure: Detachable furnace top cover enables fast internal inspection and component replacement.

4. High-quality sintering output: Sealed muffle tube heating ensures stable temperature and atmosphere, delivering high-consistency finished parts at lower production costs.

5. Eco-friendly process upgrade: Eliminates traditional acid pickling processes, improving surface finish while removing chemical pollution risks.

6. Zero pollution emission: Fully sealed atmosphere circulation ensures clean, environmentally compliant production.

3. Detailed Structural Configuration

3.1 Split-Type Heating Furnace Body

The furnace adopts a heavy-duty split structure composed of a detachable upper cover and integrated base frame. The overall shell is welded with national standard channel steel and high-strength hot-rolled steel plates (≥5 mm thickness), with a 10 mm thick reinforced front panel. This rigid welding structure ensures long-term structural stability without deformation or torsion. Protective covers are installed on both sides to shield thermocouple terminals and heating element wiring ports.

3.2 Furnace Lining & Thermal Insulation System

The furnace roof adopts full ceramic fiber modular lining, achieving approximately30% higher energy efficiency compared with traditional brick furnaces. High-grade long fiber needle blankets are pre-compressed and fixed on stainless steel anchor components, forming a gapless integral thermal insulation layer. This structure features low thermal conductivity, low heat capacity, excellent thermal shock resistance, and stable high-temperature performance.

The furnace bottom is laid with high-strength lightweight refractory bricks and high-alumina bricks to support the muffle tube steadily. Side walls are constructed with mullite bricks, with interlayer gaps filled with aluminum silicate fiber cotton to minimize heat radiation and convection loss, ensuring uniform temperature distribution across the entire furnace chamber.

3.3 High-Precision Heating Elements

Heating coils are made of premium high-resistance0Cr27Al7Mo2 alloy with stable high-temperature oxidation resistance. Each spiral heating wire is sleeved with customized high-temperature ceramic tubes. The upper and lower distributed heating structure enables rapid heat response, easy replacement, and zero thermal short-circuit risk, ensuring continuous and stable furnace operation.

3.4 Heavy-Duty 310S Stainless Steel Muffle Tube

The muffle tube is cold-formed and fully welded using 8 mm thick 310S high-temperature stainless steel plate, with reinforcing ribs evenly welded externally to enhance structural rigidity. The cooling-end interface adopts an inclined sealing design to effectively prevent protective gas leakage. High-temperature flexible sealing strips are installed at the feeding inlet, achieving automatic opening during workpiece feeding and self-sealing during idle status to reduce heat and gas loss.

3.5 Segmented Water Cooling Jacket System

The water cooling section adopts a circulating water-jacket cooling structure, consisting of a rigid steel support frame and three-segment cooling tanks. The first cooling segment inner liner is made of 6 mm SUS310 stainless steel, while the second and third segments adopt5 mm SUS304 stainless steel. All outer tanks are fabricated from 5 mm thick carbon steel plates.

Built-in supporting rollers allow free thermal expansion and contraction of the muffle tube, effectively preventing deformation and structural stress. Fiber sealing curtains and gas barrier ports at the discharge end isolate external air and maintain internal atmosphere stability.

3.6 Variable-Speed Transmission Platform

Independent feeding and discharging platforms are installed at the front and rear of the furnace. The frame is integrally welded with section steel for anti-deformation performance. The transmission system adopts a 2.2 kW cycloidal reducer with frequency stepless speed regulation, allowing flexible speed adjustment according to production output and sintering process parameters.

The S-type roller tension system with adjustable driving and driven rollers automatically compensates mesh belt elongation, preventing slipping and ensuring stable conveying tension. Optimized tension loop design minimizes belt stress and extends mesh belt service life.

3.7 SUS314 High-Temperature Resistant Mesh Belt

Workpiece conveying adopts imported SUS314 stainless steel mesh belt:

1. Wire diameter: 3.5 mm (warp), 5.0 mm (weft)

2. Screw pitch: 10 mm

3. Section pitch: 20 mm

4. Effective width: 400 mm

3.8 Intelligent PID Electrical Control System

The electrical cabinet adopts high-precision power regulators with dual manual/automatic control modes. Temperature regulation is powered by imported Fuji intelligent PID thermostats, supporting multi-segment temperature curve programming, self-tuning PID parameters, over-temperature alarm, temperature calibration, and power limit functions.

The system achieves a precise temperature control accuracy of ±1°C and furnace temperature uniformity of ±5°C. Interlock protection automatically cuts off the heating circuit when the furnace cover is opened, ensuring operational safety and equipment stability.

4. Technical Parameters

1. Power Supply: 380V / 3-phase / 50Hz

2. Rated Power: 150kW (adjustable ±5%)

3. Connection Type: Y-type connection

4. Max Design Temperature: 1150°C

5. Normal Working Temperature: ≤1050°C

6. Temperature Uniformity: ±5°C

7. Control Zones: 4 preheating zones + 7 high-temperature zones

8. Temperature Control Accuracy: ±1°C

9. Heating Mode: PID automatic power regulation

10. Empty Furnace Heating Time: ≤3 hours (gradual heating required)

11. Furnace Shell Temperature Rise: ≤ Ambient temperature +35°C

12. Muffle Tube Effective Size: Preheating zone 3000×430×110 mm; High-temperature zone 6000×430×110 mm

13. Muffle Tube Material: 310S stainless steel, 8mm thickness

5. Scope of Supply

5.1 Standard Spare Parts

• Heating resistor wire (0Cr27Al7Mo2, Shanghai origin)

• SUS314 mesh belt (Japanese imported wire)

• 310S muffle tube (Swedish raw material)

• K-type thermocouple

6. Core Component Suppliers & Materials

• Heat-resistant stainless steel plate: Swedish imported raw materials

• Aluminum silicate fiber & refractory fiber: High-temperature Materials

• Low-voltage electrical components (buttons, relays, contactors)

• Power regulator: Brand Electronics

• Fe-Cr-Al heating alloy wire: Shanghai premium alloy manufacturer

7. Responsibilities of Supplier & Buyer

7.1 Supplier Responsibilities

The supplier shall deliver full qualified equipment in accordance with contract standards, providing complete technical documents including operation manuals, electrical drawings, and certification reports. The supplier is responsible for international standard packaging, transportation arrangement, on-site installation, commissioning, and professional operator training, ensuring stable equipment handover.

7.2 Buyer Responsibilities

The buyer shall provide independent dedicated power supply, water supply, and gas pipeline systems, as well as factory layout drawings. During installation and commissioning, the buyer shall supply on-site power, water, lifting equipment, tools, and auxiliary labor for equipment positioning and assembly.

8. Site Installation Requirements

• Indoor installation with flat cement ground (17.5m × 2m)

• Workshop free of severe vibration, explosive gas, corrosive dust and conductive pollutants

• Equipped with ≥10-ton overhead crane with hook height ≥8m

• Cooling water requirement: softened water, suspended solids ≤10mg/L

• Complete three-phase five-wire power supply connected to control cabinet

9. Installation, Commissioning & Training

After equipment delivery, the buyer completes positioning placement according to layout drawings. The supplier undertakes professional assembly, cold testing, and high-temperature hot commissioning to ensure stable sintering performance. Engineers provide full on-site technical training for operation and maintenance teams to achieve independent daily operation and routine maintenance.

10. After-Sales Service & Quality Warranty

Warranty Policy: The entire machine enjoys a 12-month quality warranty (excluding wearing parts), calculated from factory shipment or commissioning completion (whichever comes first). Manufacturing defects within the warranty period are repaired free of charge.

Service Response: Technical reply within 1 working day; on-site troubleshooting within 2 working days for domestic clients; systematic solution within 7 working days for overseas projects.

Lifelong Service: Free lifelong technical consultation available after warranty expiration; spare parts supplied at factory preferential cost.