Driven by the dual pressures of global solid waste management and the demand for green building materials, a plastic brick hydraulic molding machine capable of simultaneously accommodating multiple molds has emerged as a focal point in the industry. By precisely controlling hot-pressing process parameters, this equipment efficiently combines waste plastics with construction sand and gravel to produce a new type of eco-friendly building material that rivals concrete in strength while being 30% lighter, opening up a new pathway for urban solid waste resource utilization.
1. Technical Breakthrough: Multi-Mold System Overcomes Scalability Challenges
Traditional plastic brick production lines predominantly employ a single-mold design, with mold changes taking as long as 2-4 hours, severely limiting production capacity. Shandong Zhongyou Heavy Industry Machinery Co., Ltd. (Zhongyou Heavy Industry) has developed a multi-mold hydraulic molding system that reduces mold change times to under 15 minutes through a modular quick-change mold device. Its core innovation lies in the standardized design of hydraulic system-mold interfaces—utilizing self-locking quick-change connectors and intelligent positioning pins to ensure precise mold alignment within 30 seconds, while adaptive pressure regulation in the hydraulic circuit prevents pressure fluctuations from impacting the equipment during mold changes.
2. Equipment Innovation: Intelligent Control Enhances Process Stability
Zhongyou Heavy Industry's 315-ton multi-mold hydraulic press adopts a four-column structure with a dual closed-loop servo control system, maintaining pressure fluctuations within ±0.3%. Its proprietary "segmented pressure holding-gradient cooling" process incorporates distributed temperature sensors embedded within the mold to monitor temperature changes at 12 key points in real-time, dynamically adjusting holding pressure in conjunction with the hydraulic system. For instance, when pressing an 80mm-thick plastic brick, the system initially applies 28 MPa high pressure to ensure full material filling of the mold, then gradually reduces pressure to 15 MPa for a 2-minute holding period, and finally uniformly cools the brick from 180°C to 60°C via a circulating oil cooling system, effectively preventing cracking defects caused by thermal stress.
3. Application Expansion: Full-Scenario Coverage from Building Components to Municipal Infrastructure
Zhongyou Heavy Industry's multi-mold hydraulic presses now form a complete product matrix, spanning 100-ton to 1000-ton models capable of producing over 20 types of plastic composite building materials, including permeable bricks, sound barriers, and inspection well covers. In an ecological restoration project in Xiong'an New Area, its plastic sand-based permeable bricks, with a permeability coefficient of 1.5 L/(s·m²), effectively addressed waterlogging issues common with traditional concrete bricks. Meanwhile, in the Qingdao Metro construction project, plastic composite segments produced by this equipment demonstrated a 60% improvement in corrosion resistance compared to reinforced concrete segments, with a 40% reduction in weight per ring, significantly lowering transportation and installation costs.
4. Industry Outlook: Green Manufacturing Drives Industrial Upgrading
With the accelerated construction of "zero-waste cities," the plastic building materials market is experiencing explosive growth. According to projections by the China Plastics Processing Industry Association, China's plastic building materials market is expected to surpass RMB 80 billion by 2027, with hot-pressed products accounting for over 40% of the market. Against this backdrop, Zhongyou Heavy Industry plans to invest RMB 120 million in constructing a smart factory, integrating AI visual inspection systems and digital twin technology to create a fully automated production line spanning raw material proportioning to finished product packaging.
From laboratory technology to industrial application, multi-mold hydraulic molding equipment is redefining the value of waste materials. In this green revolution, Shandong Zhongyou Heavy Industry is contributing Chinese wisdom and solutions to the construction of a zero-waste society through its relentless technological innovation.