PC brick making machine, the full name of which is precast concrete brick forming equipment, is special forming equipment for producing concrete products used in municipal pavement construction. Its production complies with the relevant standards specified in JC/T920-2011 for block forming machines. It can produce various pavement materials such as imitation stone bricks, water-permeable bricks, tactile paving bricks, curb stones and grass planting bricks. The complete set of equipment consists of batching and mixing unit, layered distributing mechanism, hydraulic forming main machine, automatic plate feeding and demoulding assembly and electric control system. The overall production process includes five stages: raw material mixing and stirring, layered material distribution, static pressure vibration compaction, green brick demoulding and transfer curing. The bricks are formed through physical compression at normal temperature without high-temperature sintering procedures.

        The machine supports a wide range of raw materials. Sand, stone and cement powder serve as base materials. Fly ash, steel slag, crushed recycled aggregate from construction waste and other industrial and construction waste can be mixed into raw materials in appropriate proportions before being sent into molds for forming. Tested finished products meet the mechanical performance indicators specified in general standards for municipal pavement materials, and can be applied to paving projects including urban roads, landscape sites and public buildings. With this raw material matching mode, building material manufacturers can consume local solid waste reserves and adjust the procurement structure of raw materials, which aligns with local policy guidance on harmless disposal of solid waste.
        
        Based on the moisture content of materials during forming, machine models available in the market adopt three forming processes: dry method, wet method and mixed dry-wet method. Dry forming machines maintain stable energy consumption control and deliver balanced water permeability of finished products, suitable for community walkways and regular municipal sidewalks. Wet forming machines feature stable pressure output and complete surface textures of bricks, matching venues with high decorative requirements such as commercial plazas and high-speed railway platforms. The mixed dry-wet forming process integrates the merits of the other two processes, balancing surface appearance and bottom water permeability, making it a common model for supporting production lines of garden and comprehensive road projects. The equipment is equipped with combined molds. Operators can replace molds of different specifications according to orders to switch production of various products. Standardized production lines only require a small number of staff for daily on-duty work, suitable for regular continuous operation of small and medium-sized building material processing plants.

        In terms of structural design, mainstream models adopt an integrated electromechanical-hydraulic scheme. The frame is welded with section steel to adapt to long-term working conditions of pressure and vibration. Separate storage bins are arranged for base materials and surface materials, and the two types of raw materials are conveyed and fed independently to reduce deviations in specification and weight of individual finished bricks. The hydraulic oil circuit is equipped with a pressure stabilizing design, which releases pressure evenly after forming to lower the occurrence of defective bricks with chipped edges or cracks. The electric control system is equipped with program interlock logic, allowing automatic coordination of each working procedure and reducing production deviations caused by manual operation.

        Daily operation and maintenance falls into three phases: pre-shift inspection, in-production patrol inspection and post-shift maintenance. Before production, workers need to check the liquid level of hydraulic oil, motor circuits and fastening status of molds, and clear agglomerated raw materials in bins to prevent material blockage during feeding. During production, operating parameters such as oil pressure and material distribution uniformity shall be recorded regularly, and the machine shall be shut down for inspection in case of parameter fluctuations. After daily production, residual materials on the whole equipment shall be fully cleaned, lubricating grease shall be applied to sliding rails, guide columns and other moving parts, and wearing parts including hydraulic filter elements and sealing pieces shall be replaced according to operation cycles. Enterprises may establish operation and maintenance ledgers to record component replacement and fault maintenance information, and arrange quarterly in-depth maintenance based on cumulative operation hours of the equipment, so as to stabilize continuous output and extend the service life of the whole machine.

        With the development of sponge cities and tightened control over natural stone mining, market demand for pavement materials made from recyclable raw materials has maintained steady growth, leading to an increasing proportion of supporting PC brick production lines. Many local building material industrial parks are equipped with pre-treatment equipment for solid waste crushing and screening, forming a complete circular chain covering waste recovery and treatment, raw material proportioning and brick making, and supply of finished products to infrastructure projects. Such production modes are gradually gaining popularity among small processing enterprises in counties, consistently promoting low-carbon and resource-oriented development in the building material manufacturing sector.