Against the Backdrop of Increasingly Stringent Global Environmental Policies and the Deepening Concept of a circular economy, the Resource Utilization of Plastic Waste and Construction Sand and Gravel Has Become a Key Issue in the Industrial Sector. Recently, a hot-pressing hydraulic press technology specifically designed for plastic-sand composite materials has drawn significant attention in the industry. This technology combines plastic waste with sand and gravel through a hot-pressing molding process, producing a new type of building material that combines strength with environmental performance, offering an innovative solution for urban solid waste treatment and green construction worldwide.
Technical Breakthrough: Hot-Pressing Process Reshapes Material Performance
The core of the hot-pressing molding technology for plastic-sand composite materials lies in precisely controlling temperature and pressure conditions to soften the plastic matrix and uniformly envelop sand and gravel particles, forming a dense structure. This process not only addresses the performance degradation caused by excessive additives in traditional plastic recycling but also significantly enhances the material's compressive strength and weather resistance through the filling effect of sand and gravel. Experimental data shows that plastic-sand bricks produced using the hot-pressing process can achieve compressive strengths of 15-25 MPa, far surpassing ordinary concrete blocks, while reducing weight by over 30%, effectively lowering building transportation costs.
Equipment Innovation: Shandong Zhongyou Heavy Industry Leads Industry Upgrades
As a leading enterprise in the domestic hydraulic press manufacturing sector, Shandong Zhongyou Heavy Industry Machinery Co., Ltd. (Zhongyou Heavy Industry) has provided crucial equipment support for the large-scale production of plastic-sand composite materials with its independently developed series of hot-pressing hydraulic presses. The company's 315-ton to 1000-ton hot-pressing hydraulic presses adopt a four-column structure and a high-precision servo control system, enabling precise control of pressure fluctuations within ±0.5% and ensuring density uniformity exceeding 98% for each brick.
"Our equipment has broken through the limitations of traditional hot-pressing machines in design," said the technical director of Zhongyou Heavy Industry. "For example, by optimizing the layout of the hydraulic circuit and heating module, we have shortened the hot-pressing cycle to 8-12 minutes, a 40% improvement over the industry average. At the same time, our unique 'segmented pressure holding' technology dynamically adjusts pressure parameters according to material characteristics, avoiding internal defects caused by sudden pressure changes." Additionally, the equipment is equipped with a titanium alloy press head and a circulating oil cooling system, further enhancing temperature uniformity and equipment durability, with a single machine capable of producing up to 500,000 square meters of plastic-sand bricks annually.
Application Scenarios: Comprehensive Coverage from Construction to Municipal Engineering
Currently, Zhongyou Heavy Industry's hot-pressing hydraulic presses have been widely applied in multiple fields. In the construction sector, their plastic-sand bricks are used for non-load-bearing walls, sound barriers, and landscape paving, significantly reducing carbon emissions throughout the building's lifecycle due to their lightweight, high-strength, and waterproof properties. In municipal engineering, plastic-sand composite materials are fabricated into curbs, drainage ditch covers, and other components, with corrosion resistance and impact resistance improved by over 50% compared to traditional cement products, effectively extending the service life of infrastructure.
Industry Outlook: The Future of Green Manufacturing Has Arrived
With the advancement of "dual carbon" goals, the hot-pressing molding technology for plastic-sand composite materials is receiving dual support from policies and markets. According to industry forecasts, the global plastic building materials market is expected to exceed $100 billion by 2030, with hot-pressing process products accounting for over 30% of the market. Against this backdrop, Zhongyou Heavy Industry plans to further increase R&D investment, launching intelligent hot-pressing production lines that enable remote equipment monitoring and adaptive adjustment of process parameters through IoT technology, providing global customers with a "turnkey" green manufacturing solution.