Explore high-performance chip sealers, road maintenance rigs, and heavy construction equipment
Combining academic research from Chang'an University with industrial-scale manufacturing mastery
Founded in 1998 as Xi'an Hongda Communications Technology Co., Ltd. by a core group of renowned professors and highway engineering scientists from Chang'an University—the cradle of China’s road construction technology—HEM Group (HME TOP Machinery) stands as the pioneer of independent R&D in specialized road maintenance equipment. Over two decades of relentless technological refinement have positioned our manufacturing plants at the forefront of mechanical dynamics, engine power matching, high-precision hydraulic transmission systems, and digital micro-computer control architectures.
Recognized in 2006 as a provincial High-Tech Enterprise by the Shaanxi Provincial Department of Science and Technology, our institution has secured scores of invention patents. In 2017, to streamline global direct sourcing, HME TOP Machinery Equipment Co., Ltd. was established to spearhead international engineering collaboration, customized OEM design, and global after-sales lifecycle support.
Modern pavement preservation demands absolute precision. Synchronous chip seal trucks integrate asphalt binder spraying and aggregate chipping into a single-pass operation. By maintaining a zero-delay interval between binder application and chip displacement, the hot bitumen (or polymer-modified emulsion) retains maximum thermal energy and surface tension, allowing aggregate particles to penetrate up to 60-70% of their average least dimension (ALD).
This synchronized mechanism eliminates binder cooling, prevents traffic-induced stone loss (shelling), and creates a seamless water-impermeable seal coat. Our machines utilize dynamic radar velocity sensors paired with proportional hydraulic displacement valves to adjust flow rates instantly, maintaining spray accuracy within ±1% across variable vehicle speeds.
Quantifiable excellence verified across international road construction projects
Why Tier-1 global contractors source heavy maintenance equipment directly from our facilities
China’s specialized equipment manufacturing hubs provide unparalleled supply-chain integration. From high-tensile steel structural fabrication and thermal insulation tank production to automated hydraulic valve block machining, every component is sourced within concentrated industrial clusters. This reduces lead times from months to weeks while drastically reducing overall unit assembly costs.
Our plants adhere strictly to ISO9001 quality management systems, CE directives, and national heavy vehicle structural compliance standards. Every chip seal truck undergoes hydrostatic pressure testing of bitumen lines, laser-guided aggregate distribution calibration, and 100-hour continuous stress testing before export shipment.
Recognizing that global road networks vary, our production lines support direct mounting onto multiple commercial chassis brands including Sinotruk HOWO, Shacman, FAW, ISUZU, MAN, and Volvo. Buyers can request customized tank capacities (from 6,000L to 16,000L), aggregate hopper volumes (from 8m³ to 15m³), and dual-heating system designs (diesel burner + heat transfer oil).
The evolution of intelligent, low-emission, high-efficiency road rehabilitation machinery
The global pavement maintenance industry is shifting rapidly toward automated, data-driven jobsite management. Next-generation chip seal trucks are no longer mere mechanical spreaders; they are intelligent mobile workstations. Integrated smart controls continuously monitor real-time road surface temperature, ambient humidity, vehicle ground speed, and asphalt viscosity. The automated ECU system dynamically recalculates the exact bitumen spray pressure and chip discharge rate on the fly.
Through integrated cloud telematics, fleet managers can monitor material consumption rate per square meter, verify job quality remotely via GPS positioning, and optimize preventative maintenance schedules, minimizing operational downtime and contractor waste.
| Feature Parameter | Legacy Manual Chip Sealers | Standard Automatic Sealers | HEM High-Tech Synchronous Chip Seal Trucks |
|---|---|---|---|
| Binder Spraying Accuracy | ± 8% - 12% (Speed Dependent) | ± 3% - 5% | ± 1.0% (Radar Servo Feedback) |
| Synchronous Spray-to-Chip Delay | > 30 seconds (Two Separate Vehicles) | 2 - 5 seconds | < 0.5 seconds (Integrated Single Pass) |
| Aggregrate Size Adaptability | Single Fixed Size (e.g., 10mm) | 3mm - 15mm Manual Adjust | 3mm - 25mm Pneumatic Auto-Select |
| Thermal Insulation & Heating | Single Direct Diesel Burner | Direct Fire + Manual Circulation | Heat Transfer Oil + Dual Auto-Burners |
| Telematics & Reporting | None | Basic Mileage Logging | Full IoT Cloud Sync, AI Spray Analytics |
Engineered to excel across extreme climatic conditions and varied geographical terrains
Operating in regions such as the Middle East, North Africa, and Western Australia requires robust thermal protection and cooling efficiency. HEM Chip Seal Trucks feature reinforced dual-radiator hydraulic cooling loops and high-density rockwool tank insulation, preventing asphalt overheating while ensuring hydraulic system stability under 50°C ambient temperatures.
Across mountain corridors in South America, Central Asia, and Southwest China, steep gradients require high engine torque and precise low-speed cruise control. Our machinery employs turbocharged Cummins or Weichai engines paired with heavy-duty retarder gearboxes, enabling uniform aggregate coverage on up to 15% road gradients without engine stall.
For country roads and low-traffic suburban thoroughfares, synchronous chip sealing is the most cost-effective pavement preservation strategy available. Providing 5 to 7 years of extended road life at a fraction of hot-mix asphalt overlay costs, our equipment enables municipal public works departments to maximize maintenance budgets.
HEM Group provides one-stop infrastructure solutions from aggregate crushing to final surface treatment
A successful chip seal project depends not only on the chip sealer itself, but also on high-grade asphalt emulsions, properly sized aggregate chips, precise base preparation, and robust earthmoving support. HEM Group manufactures a comprehensive product matrix designed for seamless fleet integration:
Expert insights on selecting, operating, and maintaining chip seal equipment
Synchronous chip sealing applies hot bitumen emulsion and stone aggregate simultaneously within a fraction of a second. This ensures the aggregate lands on the hot binder before skinning or thermal dissipation occurs, delivering up to 40% higher aggregate adhesion strength and significantly reducing binder failure and stone loss under heavy traffic.
HEM synchronous chip sealers are highly versatile, equipped with heavy-duty heat transfer oil circulation and high-capacity asphalt pumps. They handle standard paving asphalt, polymer-modified bitumen (PMB), SBS modified asphalt, rubberized bitumen, and specialized cationic emulsified asphalt without clogging or thermal breakdown.
Our units use a closed-loop microcomputer control system integrated with high-precision ground radar speed sensors. When vehicle speed fluctuates during operation, the computer automatically signals proportional hydraulic motor drives to adjust the asphalt pump output and chip roller feed speed in real time, keeping the application rate (kg/m²) virtually constant.
Yes. In addition to fully assembled turn-key trucks on Sinotruk or Shacman chassis, we supply complete upper-structure kits (tank, hopper, spray bar, engine, hydraulics, and ECU controls) designed for mounting onto client-supplied chassis in local destination markets, minimizing import tariffs and freight costs.
We provide full technical support including detailed operation manuals, video tutorials, 24/7 online troubleshooting, and optional on-site dispatch of experienced service engineers for operational calibration, jobsite testing, and technician training. We maintain regional spare parts inventories across South Africa, Russia, Southeast Asia, and Central Asia.
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HME Machinery