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Product Description
The BSR Oil-Type Mold Temperature Controller (MTC) is a high-performance thermal management system engineered for precision mold temperature control in high-temperature plastic and rubber processing environments. Operating on a closed-loop thermal oil circulation principle, the BSR series heats heat-transfer oil to the target temperature (up to 350°C) via electric heating elements within a 304 stainless steel heating chamber. A high-temperature oil pump pressurizes and delivers the heated oil into the mold's flow channels, where it transfers heat to or absorbs heat from the mold cavity. The return oil flows back to the oil reservoir, passes through an indirect cooling system (plate heat exchanger with cold-water solenoid valve) for temperature reduction when needed, and re-enters the heating chamber — completing a continuous, precisely controlled thermal loop.
The system integrates a full-digital PID + PLC dual-control architecture that maintains temperature accuracy within ±1°C across all operating conditions. Compared with water-type MTC units (typically limited to 120–180°C), oil-type MTCs operate at significantly higher temperatures, making them the required choice for engineering plastics (PA, PC, PPS, PEEK), die-casting mold preheating, and rubber vulcanization processes.
The BSR series comprises 10 models spanning 6 kW to 60 kW heating power. Key variants include the BSR-6RX2 and BSR-9X2 Dual-Unit configurations, which house two independent heating and pumping circuits in a single frame — enabling simultaneous, independent temperature control of both the fixed and moving mold halves.
| Model | Heating Power (kW) | Pump Motor (kW) | Max. Temp (°C) | Pump Flow (m³/h) | Pipe Size (inch) | Motor (HP) | Dimensions W×D×H (mm) | Weight (kg) |
|---|---|---|---|---|---|---|---|---|
| BSR-6 | 6 | 0.75 | 350 | 2.2 | 1/2" | 5 | 770×330×630 | 75 |
| BSR-6RX2 (Dual-Unit) | 6×2 | 0.75×2 | 350 | 2.2 | 1/2" | — | 770×660×630 | 105 |
| BSR-9 | 9 | 0.75 | 350 | 2.2 | 1/2" | — | 770×660×630 | 75 |
| BSR-9X2 (Dual-Unit) | 9×2 | 0.75×2 | 350 | 2.2 | 1/2" | — | 770×660×630 | 105 |
| BSR-12 | 12 | 1.1 | 350 | 2.5 | 3/4" | — | 800×400×730 | 95 |
| BSR-18 | 18 | 1.5 | 350 | 2.5 | 3/4" | — | 800×400×730 | 95 |
| BSR-24 | 24 | 2 | 350 | 2.8 | 3/4" | — | 1000×400×800 | 125 |
| BSR-36 | 36 | 3 | 350 | 3.2 | 3/4" | — | 1000×500×1000 | 170 |
| BSR-48 | 48 | 4 | 350 | 3.2 | 3/4" | — | 1000×500×1300 | 170 |
| BSR-60 | 60 | 5.5 | 350 | 3.5 | 1" | — | 1100×500×1300 | 220 |
Key Specifications:
Temperature Range: All models achieve 350°C maximum operating temperature
Control Accuracy: ±1°C via full-digital PID + PLC architecture
Cooling Method: Indirect cooling (plate heat exchanger + cold-water solenoid valve)
Safety Protections: Over-temperature alarm, overload protection, oil-shortage detection, reverse-phase alarm, emergency power cutoff switch
Dual-Unit Models: BSR-6RX2 and BSR-9X2 feature two independent heating and pumping circuits for simultaneous independent control of mold halves
The BSR oil-type MTC is built around a carefully engineered system architecture where each component is selected for sustained 350°C industrial operation. The following 12+ subsystems work in concert to deliver precision, reliability, and safety.
The core of the BSR precision control is a full-digital PID algorithm running in tandem with a PLC real-time controller. The PID loop continuously calculates the error between the setpoint and the actual mold temperature (read via high-accuracy thermocouples), adjusting the heating element duty cycle through SSR (Solid State Relay) switching. The PLC layer provides supervisory control: managing startup sequencing, alarm logic, and communication with the touchscreen HMI. This dual-layer architecture ensures ±1°C control accuracy even under fluctuating mold heat loads.
Each BSR unit is equipped with an imported ultra-high-temperature oil pump engineered for continuous thermal oil circulation at 350°C. The pump features a mechanical seal rated for high-temperature service, a cast-iron/steel volute for durability, and is directly coupled to the motor. Pump motor power scales from 0.75 kW (BSR-6/9) to 5.5 kW (BSR-60), delivering flow rates from 2.2 to 3.5 m³/h with stable discharge pressure even at elevated fluid temperatures. The large-flow impeller design accommodates special molding requirements with high flow resistance.
The heating chamber is fabricated from 304 stainless steel for corrosion resistance and thermal stability. Inside, immersion-type electric heating elements (totaling 6–60 kW depending on model) heat the thermal oil directly. The heating elements are arranged for uniform heat distribution, and the chamber volume is optimized to balance thermal response speed against temperature stability.
Cooling is achieved through a plate-type heat exchanger operating in an indirect cooling configuration. When the oil temperature exceeds the setpoint, a cold-water solenoid valve opens, allowing cooling water to flow through one side of the heat exchanger while the return oil flows through the other. This indirect method avoids direct mixing of water and oil, prevents thermal shock, and provides smoother temperature transitions than direct cooling — critical for maintaining ±1°C precision during mold cooling phases.
The operator interface is a touchscreen control panel that displays real-time temperature readings, setpoint values, pump status, and alarm indicators at a glance. The interface supports temperature curve monitoring, parameter setting, and alarm history review. Operation is intuitive: set the target temperature, press start, and the system handles the entire heating and regulation cycle.
Heating element power regulation uses SSR (Solid State Relay) modules rather than mechanical contactors. SSRs provide zero-crossing switching with no contact wear, no arcing, and response times in the millisecond range — enabling the tight duty-cycle control required for ±1°C PID regulation. This also significantly extends the service life of the power switching stage.
A dedicated over-temperature thermocouple independent of the control loop monitors the heating chamber temperature. If the temperature exceeds the safety threshold, the system triggers an audible/visual alarm and automatically cuts power to the heating elements, preventing thermal runaway.
The control system continuously monitors oil level in the reservoir and phase sequence of the incoming power supply. Low oil level triggers an alarm and prevents heater activation (dry-fire protection). Reverse-phase detection prevents pump motor damage from incorrect rotation direction at installation.
A prominently positioned main power touch switch provides instant electrical isolation in any emergency situation. This switch disconnects all power to the heating elements and pump motor with a single action.
The oil reservoir tank and all internal fluid-contact piping are constructed from 304 stainless steel. This material selection prevents corrosion from high-temperature thermal oil, avoids contamination of the heat transfer fluid, and contributes to the machine's clean, professional appearance.
For mold connection, high-performance temperature-resistant metal hoses are available as an optional accessory. These hoses are rated for continuous 350°C service and provide safe, reliable oil transfer between the MTC unit and the mold.
The machine frame is a welded steel structure with integrated casters for mobility within the factory floor and lifting eyes for crane handling during installation. The frame design provides stability and vibration damping while keeping the overall footprint compact.
Imported Ultra-High-Temperature Oil Pump — 350°C Capability
The BSR series employs an imported oil pump specifically engineered for sustained operation at 350°C. The pump's mechanical seal, bearing materials, and hydraulic design are all rated for high-temperature thermal oil service, ensuring reliable circulation without degradation over extended production runs.
High-Flow Circuit Design for Demanding Molds
The pump impeller and internal flow path feature a large-flow special design that maintains stable oil delivery even through molds with high flow resistance. This ensures consistent heat transfer to all cavity zones, critical for thick-wall or complex-geometry parts.
Imported High-Performance Pump — Pressure and Flow Stability
The pump delivers consistent discharge pressure across the full operating temperature range, preventing flow-rate drift that could cause localized mold temperature deviations. Motor power is matched to pump characteristics for optimal efficiency at each model tier.
Clean, Stable Machine Structure — Easy Operation and Maintenance
The BSR frame design prioritizes accessibility: all service points (oil fill port, drain valve, filter access, electrical panel) are positioned for convenient access. The straightforward pipe routing and component layout simplify routine inspection and maintenance tasks.
Full-Digital PID Control — ±1°C Precision
The PID control system continuously samples mold temperature via precision thermocouples and adjusts heater output through SSR switching. This closed-loop regulation maintains mold temperature within ±1°C of setpoint under all operating conditions, eliminating temperature-related part defects.
PLC Real-Time Supervisory Control
A dedicated PLC provides real-time machine supervision beyond the PID loop: managing startup sequencing, coordinating the cooling solenoid valve, monitoring all safety sensors, and logging alarm events. This dual-layer architecture (PID for precision + PLC for system integrity) ensures stable, unattended operation.
Touchscreen Control Panel — Intuitive Operation
The touchscreen HMI consolidates all machine controls into a single interface. Operators can set temperature, monitor real-time curves, view alarm history, and adjust parameters without navigating complex button panels. Status indicators are clear at a glance.
Multi-Layer Automatic Protection System
The BSR integrates multiple automatic protection functions: over-temperature alarm with heater cutoff, motor overload protection, oil-shortage detection preventing dry heating, reverse-phase detection protecting the pump motor, and emergency power disconnect. Fault conditions trigger both audible/visual alarms and automatic protective actions.
Indirect Cooling for Precision Temperature Control
Unlike direct cooling methods that inject cold water into the oil circuit, the BSR uses a plate heat exchanger for indirect cooling. This avoids thermal shock, prevents oil contamination, and enables gradual, controlled temperature reduction — essential for maintaining ±1°C precision during mold cooling phases.
Automatic Water Replenishment for Rapid Cooling
An automatic water replenishment device accelerates cooling from elevated temperatures to lower setpoints, reducing the time required for mold temperature transitions and improving overall cycle efficiency.
304 Stainless Steel Internal Construction
All internal fluid-contact components — heating chamber, oil reservoir, piping — are fabricated from 304 stainless steel. This eliminates corrosion risks from thermal oil at high temperature and maintains fluid purity over years of service. The exterior design is clean and professional, suitable for modern factory environments.
Optional High-Temperature Resistant Oil Hoses
For mold connection, high-performance temperature-resistant metal hoses rated for continuous 350°C operation are available. These optional hoses ensure safe, leak-free oil transfer between the MTC unit and mold, even under sustained high-temperature conditions.
The BSR oil-type MTC serves high-temperature mold thermal management across the following processes:
| Application | Typical Materials | Mold Temperature Range | Key Benefit |
|---|---|---|---|
| Injection Molding — Engineering Plastics | PA6, PA66, PC, PPS, PEEK, PSU, PEI | 120–350°C | Prevents short-shot and warpage in crystalline and high-Tg polymers |
| Extrusion Mold Temperature Control | PP, PE, PVC, WPC | 150–250°C | Uniform die-head temperature for consistent melt flow and profile dimensions |
| Die-Casting Mold Preheating & Holding | Aluminum, zinc, magnesium alloys | 180–300°C | Reduces thermal shock at metal injection, extends die life |
| Blow Molding | PET, PC, PP | 100–180°C | Precise parison temperature for wall-thickness consistency |
| Rubber Vulcanization Molding | NBR, EPDM, silicone, FKM | 160–250°C | Uniform mold temperature for consistent cure time and crosslink density |
The operational workflow of the BSR oil-type MTC follows a structured 6-step process:
Fill Thermal Oil: Charge the reservoir with the specified high-temperature thermal oil to the indicated level. Use only oils rated for the target operating temperature (350°C maximum).
Set Target Temperature: Enter the desired mold temperature on the touchscreen control panel. The PLC verifies all safety interlocks before enabling the heating circuit.
PID Heating Cycle: The system activates heating elements via SSR switching under PID control. Thermal oil circulates through the heating chamber, absorbing heat until reaching the setpoint. The pump runs continuously to maintain uniform oil temperature throughout the circuit.
Mold Temperature Stabilization: Heated oil is pumped through the mold flow channels, transferring heat to the mold steel. The PID loop adjusts heater output to compensate for heat loss to the mold and ambient environment, stabilizing at ±1°C of setpoint.
Indirect Cooling (When Required): If the return oil temperature exceeds the setpoint (due to hot-melt heat pickup or setpoint reduction), the cold-water solenoid valve opens, routing cooling water through the plate heat exchanger. The return oil is cooled indirectly before re-entering the heating chamber.
Mold Change — Oil Drain: At production changeover, allow the oil to cool below 80°C, then open the drain valve to empty the mold circuit. Disconnect the oil hoses, swap the mold, reconnect, and restart from Step 1.
Water-type MTCs are limited to approximately 120–180°C maximum depending on system pressure (pressurized water units can reach 160–180°C). For mold temperatures above 180°C, oil-type MTCs are mandatory. As a practical guideline: commodity thermoplastics (PP, PE, PS, ABS) typically run at 20–90°C mold temperature and are well served by water-type units. Engineering plastics demand higher mold temperatures: PA6/PA66 at 80–120°C (water-type feasible at the upper range), PC at 90–120°C, PPS at 130–150°C (oil-type recommended), PEEK at 160–200°C (oil-type required), and PEI/PSU at 140–180°C. Oil-type MTCs become the definitive choice when mold temperature exceeds 150°C, when processing semi-crystalline engineering resins that require elevated mold temperatures for proper crystallization, or when die-casting mold preheating above 200°C is needed. The BSR series with 350°C maximum covers all these application ranges with headroom.
For BSR models operating up to 350°C, a synthetic heat transfer fluid rated for at least 350°C bulk temperature is required. Key specifications: flash point ≥ 220°C (open cup), auto-ignition temperature ≥ 350°C, kinematic viscosity ≤ 40 cSt at 40°C for efficient pump circulation, and thermal stability demonstrated by ≤ 10% low-boiler formation after 1000 hours at rated temperature. Recommended types include hydrogenated terphenyl-based or alkylbenzene-based synthetic thermal oils from established manufacturers. Oil replacement interval depends on operating conditions: under continuous operation at 280–350°C, replace every 6–12 months or 4000–6000 operating hours; at 200–280°C, every 12–18 months. Monitor oil condition monthly — darkening color, increased viscosity, or a burnt odor signals degradation. Always pre-filter new oil before charging and keep the reservoir sealed to prevent oxidation and moisture ingress.
The RX2/X2 Dual-Unit configurations physically house two complete, independent heating-and-pumping circuits within a single machine frame. Each circuit has its own PID+PLC controller, heating chamber, oil pump, temperature sensor, and safety system — enabling simultaneous independent temperature control of two separate mold zones. In practice, this means one circuit can maintain the fixed mold half at 160°C while the other maintains the moving mold half at 200°C, with no thermal cross-talk. The primary application is injection molding of complex parts where the cavity and core sides require different temperatures: for example, a PC automotive lens where the cavity side needs 130°C for surface finish while the core side runs at 110°C for cycle time optimization. Compared with purchasing two separate single-circuit units, the Dual-Unit configuration saves floor space (~30% footprint reduction), reduces installation complexity (single power and cooling water connection), and lowers capital cost. Each model (BSR-6RX2: 6 kW × 2; BSR-9X2: 9 kW × 2) targets different mold sizes.
Direct cooling injects cold water directly into the thermal oil return line — rapid but crude. The sudden temperature drop creates thermal shock in the oil, causes localized viscosity spikes that disturb pump flow stability, and can introduce water contamination if heat exchanger seals degrade. The BSR's indirect cooling routes the return oil through one side of a plate heat exchanger while cooling water flows through the other side; the two fluids never mix. This provides three critical advantages for precision molding: (1) Gradual temperature transition — the temperature change rate is controlled by the water flow rate through the solenoid valve, preventing overshoot; (2) No thermal shock — the oil temperature changes smoothly without localized cold spots that could cause PID loop oscillation; (3) Zero contamination risk — the oil circuit remains sealed and dry, eliminating the maintenance burden of water-in-oil emulsion formation. The result is ±1°C control accuracy even during active cooling phases, which direct cooling systems typically cannot achieve due to their inherently nonlinear and aggressive cooling response.
The BSR integrates five layers of safety protection: (1) Independent over-temperature thermocouple with automatic heater cutoff if the heating chamber exceeds the safety threshold; (2) Motor overload protection that trips the pump contactor under excessive current draw; (3) Oil-shortage detection via level sensor — prevents dry heating of elements; (4) Reverse-phase detection that blocks pump startup if incoming power phase sequence is incorrect; (5) Emergency power cutoff touch switch for immediate electrical isolation. For daily maintenance: check thermal oil level and condition at shift start; inspect all hose connections for seepage (thermal oil leaks create fire hazards at high temperature); verify that the over-temperature alarm functions correctly during monthly tests; clean the cooling water strainer every 2–4 weeks to maintain heat exchanger efficiency; replace the oil filter element every 3 months; and schedule annual professional inspection of the heating elements, pump mechanical seal, and all electrical connections. With consistent adherence to these routines, the BSR series is engineered for 5+ years of continuous industrial service.
Zhangjiagang Chenxing Machinery Co., Ltd. is an integrated plastic processing equipment manufacturer with a comprehensive product ecosystem that covers the entire production chain — from raw material preparation through extrusion, molding, and auxiliary thermal management. When you source your BSR oil-type mold temperature controller from Chenxing, you gain access to a full-range equipment portfolio and engineering support under one roof.
Complete Material Preparation Lineup
Before plastic reaches the mold, it must be ground, pulverized, or crushed to specification. Chenxing's SMF Series Disc Grinding Pulverizer delivers fine powder output for PVC, PE, and masterbatch applications. For applications requiring knife-type size reduction, the SMP Series Knives Pulverizer offers high-throughput grinding with adjustable particle size control. For heavy-duty lump and scrap reduction, the NSPC Series Crusher provides robust crushing and grinding in a single machine.
Extrusion Solutions for Every Profile
The BSR MTC pairs seamlessly with Chenxing's extrusion line. For PVC and WPC processing, the Conical Twin-Screw Extruder delivers superior plasticizing with low shear heating. For high-output PP/PE applications, the Single-Screw Extruder provides reliable throughput with energy-efficient barrel heating. Downstream, the Water Strand Pelletizing Line (SJ Series) produces uniform compound pellets, while the Water-Ring Cutting Recycling & Granulating Line closes the loop on post-industrial waste.
Profile, Pipe & Board Extrusion Lines
Mold temperature stability is critical for dimensional accuracy across all downstream extrusion processes. Chenxing's PVC/WPC Profile Extrusion Line produces window frames, door panels, and decorative trims with tight tolerances. The PPR/PPH High-Speed Pipe Production Line handles plumbing and industrial pipe diameters at high output rates. For panel and sheet products, the PVC/WPC Celuka Foam Board Sheet Extrusion Line produces lightweight foamed boards with consistent density and surface quality.
Full Auxiliary Equipment Range
Beyond the MTC, Chenxing's Auxiliary Machines portfolio includes chillers, hopper loaders, vibrating screens, dust collectors, and shredders — every peripheral device needed for a complete production cell. This single-vendor approach simplifies procurement, ensures equipment compatibility, and provides a single point of contact for after-sales service.
Explore the Full Portfolio
Visit our Products Center for the complete equipment catalog, browse Application Solutions for industry-specific configurations, read the latest updates on our Company News page, and learn about our manufacturing capabilities on the About Us page.
Step 1 — Specify Your Requirements
Tell us your mold size, target temperature, material type, and desired heating power. Our engineers will recommend the optimal BSR model and configuration (single-circuit or Dual-Unit).
Step 2 — Receive a Tailored Quotation
We provide a detailed commercial offer including machine specifications, delivery timeline, installation requirements, and optional accessories (high-temperature hoses, spare parts kit).
Step 3 — Production & Quality Inspection
Your BSR MTC is manufactured at our Zhangjiagang facility with full quality inspection — including temperature accuracy verification, safety interlock testing, and 24-hour burn-in run before shipment.
Step 4 — Delivery, Installation & Support
The machine is shipped with comprehensive documentation. Our technical team provides remote installation guidance and commissioning support to get your production running.
Email: ceo@cxsljx.com
Phone/WhatsApp: Nicole +86 159 5118 7228
Company: Zhangjiagang Chenxing Machinery Co., Ltd.
Website: www.chenxingmachinery.com
