QT40-3A portable block making machine with wheels and electrical control box

The QT40-3A portable block making machine operates using a mobile production method, where the machine itself moves while the produced concrete bricks remain stationary. The QT40-3A portable block machine is capable of self-propulsion thanks to an integrated power system featuring a travel motor and wheels. Operators control the travel motor via the PLC control panel; power is transmitted to the wheels via a chain drive, thereby propelling the machine.

Proper cement storage relies on protection against water and moisture; therefore, cement must be kept in a dry, well-ventilated warehouse. When stacking, a distance of 40 cm from the walls must be maintained, and the bags should be placed on wooden pallets raised at least 50 cm off the ground to prevent moisture absorption. Additionally, as cement has a limited shelf life, workers must carefully check for expiration before use; if the cement is expired or has formed lumps, its use must be discontinued immediately.

The key to curing concrete bricks is maintaining moisture. First, bricks freshly produced by the QT40-3A portable block making machine must remain undisturbed for 24 hours; moving or handling them during this period is prohibited. Next, water-spray curing begins 24 to 36 hours after molding; it is recommended to spray water once or twice daily, though the frequency may be increased if the local climate is hot and dry. After spraying, the bricks should be covered with plastic sheeting or straw mats to protect them from direct sunlight. After 21 days of curing, the plastic sheeting is removed to allow the bricks to air-dry naturally; the curing process concludes on the 28th day, at which point the bricks have attained maximum strength.

Incorporating fly ash into the raw materials for concrete bricks produced by the QT40-3A portable block making machine not only reduces production costs but also facilitates resource recycling. As fly ash is less expensive than cement, its inclusion lowers production costs and increases profit margins. Fly ash contains a large number of glass microspheres, which improve the flowability of the raw materials, reduce the porosity of the bricks, and enhance their impermeability. However, adding excessive amounts of fly ash can compromise the strength of the bricks; based on years of analysis and research by our engineers, the optimal usage rate is 20% of the cement content.

Cleaning the mold is a crucial step in the maintenance of the QT40-3A portable block making machine. If residual concrete material inside the mold hardens and adheres to the inner surfaces, it can cause the concrete bricks produced in the next cycle to have chipped corners; furthermore, such residue can gradually corrode the mold. Therefore, after finishing the daily production of concrete bricks with the QT40-3A portable concrete block making machine, workers should promptly clean the concrete raw materials from the molds and apply a thin, even coat of anti-rust oil.

First, examine the portable block making machine’s framework; thicker steel plates result in a sturdier structure, while high-quality, uniform welding ensures the frame remains crack-free under prolonged vibration and enhances the machine’s overall structural integrity. Next, assess the quality of components such as the molds, vibrators, and motors. Finally, consider whether the manufacturer offers comprehensive after-sales service.