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Vietnam Hollow Cement Block Machine
The Cement Interlocking Brick Making Machine and Paving Stone Making Machine are essential for construction. They efficiently produce high - quality interlocking bricks and paving stones. With advanced technology, they ensure stable performance, meet various construction needs, and are popular in building projects and urban road construction.
Features
Langfang Nianpeng Mechanical Equipment Processing Co., Ltd. is one of the most reliable manufacturers and suppliers of vietnam hollow cement block machine in China. If you're going to buy high quality vietnam hollow cement block machine, welcome to get pricelist and quotation from our factory. For price consultation, contact us.
Vietnam hollow cement block machine
The main curing methods for cement bricks made by hollow brick machines include natural curing, steam curing and chemical curing. The following is a detailed introduction:
Natural curing
Principle: Using the temperature and humidity in the natural environment, the cement and other cementitious materials in the hollow bricks undergo hydration reaction under the action of water, gradually hardening and increasing the strength.
Operation method: After the hollow bricks are formed, place them in a flat, well-ventilated site to avoid direct sunlight and strong winds. In dry weather conditions, it is necessary to regularly spray water on the surface of the cement bricks with a sprayer or sprinkler to keep the surface moist. Generally, water is sprayed 3-5 times a day, and the specific number depends on the ambient humidity and temperature. When spraying water, ensure that all parts of the brick body can be evenly exposed to water. The curing time is usually 7-14 days. In high temperatures in summer, the curing time can be appropriately shortened; in low temperatures in winter, the curing time needs to be extended.
Steam curing
Principle: By introducing steam, the temperature and humidity of the curing environment are increased, the hydration reaction of cement is accelerated, and the cement bricks can obtain higher strength in a shorter time.
Operation method: Put the cement bricks into a special steam curing kiln or curing pool. The curing kiln or curing pool should have good sealing performance to ensure the stability of steam temperature and humidity. After the steam is introduced, the temperature is gradually raised to the set value, generally between 60-90℃. The heating rate should not be too fast to avoid excessive temperature stress inside the cement bricks and cause cracking. After reaching the set temperature, maintain constant temperature curing for a certain period of time, generally 8-12 hours. After the curing is completed, slowly lower the temperature and let the cement bricks gradually cool to room temperature before leaving the kiln or pool.
Chemical curing
Principle: Spray or apply curing agent on the surface of hollow bricks. The curing agent forms a protective film on the surface of hollow bricks to prevent water evaporation. At the same time, some components in the curing agent may react chemically with cement to further improve the performance of cement bricks.
Operation method: Select a suitable curing agent and dilute or mix according to the product instructions. Within 1-2 hours after the hollow brick is formed, after the surface of the cement brick is slightly dry, use a spray gun or brush to evenly spray or brush the curing agent on the surface of the hollow brick. Ensure that the curing agent covers the entire surface without any omissions. The protective film formed by the curing agent generally does not need to be removed before the cement brick is used, and it can also improve the impermeability and durability of the cement brick to a certain extent.
Regardless of the curing method used, during the curing period, the hollow brick should be protected from mechanical collision and vibration to avoid affecting its strength and appearance quality. At the same time, the strength and other properties of the hollow brick should be tested regularly to ensure that the curing effect meets the requirements.
Hollow brick machine is a machine that produces hollow bricks with stone powder, fly ash, slag, slag, gravel, sand, water and other raw materials. Its working principle mainly includes the following key links:
Raw material processing and transportation
Raw material processing: The raw materials required for hollow brick production, such as clay, shale, industrial waste slag, etc., must be crushed, ground and other processes first. The crusher crushes the larger particles of raw materials into smaller particles, and the grinder further grinds the raw materials into a suitable fineness to ensure the uniformity and plasticity of the raw materials.
Raw material transportation: The processed raw materials are transported to the mixer at a certain ratio and speed through conveying equipment such as belt conveyors and screw conveyors. At the same time, the metering device will accurately control the amount of various raw materials and water to ensure the accurate proportion of ingredients to ensure the quality of hollow bricks.
Stirring and mixing
After the raw materials enter the mixer, the stirring blades rotate at high speed driven by the motor to fully stir and mix the raw materials. During the stirring process, the raw materials and water are evenly distributed, and cement and other cementitious materials are fully hydrated to form a mixture with good plasticity and fluidity. The mixing time and mixing intensity will be adjusted according to the characteristics of the raw materials and production requirements to ensure the stability of the quality of the mixture.
Forming link
Distribution: The mixed mixture is conveyed to the top of the forming mold through the conveyor belt, and then evenly filled into each mold cavity of the mold by the distributor. The distribution process must ensure that the filling amount and uniformity of the mixture in the mold cavity are consistent, otherwise it will affect the dimensional accuracy and quality of the hollow brick.
Pressing:
Mechanical transmission: Some hollow brick machines use mechanical transmission. The motor drives the crank-connecting rod mechanism through transmission parts such as belts and gears, converting the rotational motion of the motor into the linear motion of the punch. The punch applies pressure to the mixture in the mold to form it. This method has a relatively simple structure, but the adjustment range of pressure and speed is limited.
Hydraulic transmission: Most modern hollow brick machines use a hydraulic transmission system. The hydraulic pump delivers hydraulic oil to the hydraulic cylinder, pushing the piston to drive the punch to press the mixture. The hydraulic system can provide a large and stable pressure. By adjusting the hydraulic valve, the pressure, pressing speed and holding time can be accurately controlled to meet the production of hollow bricks with different specifications and quality requirements.
Hollow structure formation: In the forming mold, there is a specially designed core rod or core mold. When the mixture is pressed, the core rod or core mold occupies a certain space, so that the formed brick body forms a hollow structure. The size, shape and number of hollow structures are determined by the design of the mold.
Demolding and brick discharge
Demolding: When the hollow brick is formed in the mold and reaches a certain strength, the demoulding system starts to work. Through mechanical or hydraulic devices, the mold and the brick body are separated, and the formed hollow brick is removed from the mold. The demoulding process needs to be smooth and slow to avoid damage to the brick body.
Brick discharge: The hollow brick after demoulding is transported to the next process, such as stacking or curing area, by the brick discharge device. The brick discharge device can be a belt conveyor, a manipulator, etc., which can efficiently and accurately transport the hollow brick away from the forming area.
Control system
Automation control: Modern hollow brick machines are equipped with advanced control systems, usually using programmable logic controllers (PLC). According to the preset program, PLC automatically controls the actions and parameters of each link such as raw material conveying, mixing, molding, demoulding, etc., to realize the automation and precise control of the production process.
Parameter adjustment and monitoring: Operators can input different production parameters such as raw material ratio, mixing time, molding pressure, pressing speed, etc. through the control panel or human-machine interface. The control system can monitor the operating status of the equipment in real time, such as pressure, temperature, motor speed, etc. Once an abnormal situation occurs, it will promptly alarm and take corresponding measures to ensure the safe and stable operation of the equipment.
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