A method for manufacturing rainwater grates, characterized in that a reinforced concrete structure rainwater grates are prepared by pouring concrete, and a box shaped lower mold is used to pour the rainwater grates during the pouring process, forming the external structure of the rainwater grates. Concrete pouring. The steel bar installation frame of a rectangular frame structure composed of four vertical plates forms the shape of the lower part of the inner wall of the rainwater grate outlet. The upper part of the inner wall of the rainwater grate outlet is set directly above the steel bar installation frame through the frame, and the two ends of the steel bar are sandwiched between the upper end of the steel bar installation frame and the lower end of the frame to form a mold.
The manufacturing method of rainwater grates can be achieved through simple molds. The lower formwork is equipped with a steel bar installation frame for installing steel bars. When making rainwater grates, install the steel bars on the steel bar installation rack, and then install the rack to fix the steel bars. The steel installation frame and the inner side of the frame form the shape of the inner wall of the rainwater grate drainage outlet, and then the concrete is poured into the lower mold. After the concrete solidifies, remove the mold to obtain a rainwater grate. The structure is simple and easy to operate. The rainwater grate is produced using a mold, which has high production efficiency and convenient demolding.
The manufacturing method of rainwater grates specifically includes the following steps:
a. Obtain a steel mold with the following structure: the steel mold includes a lower mold, the lower mold includes a rectangular box with an upper end opening, and the rectangular box surrounded by four vertical plates is a steel bar installation frame with a rectangular frame structure inside the lower mold. The long side of the steel bar installation frame and the long side of the lower mold are respectively arranged, and there are multiple installation grooves formed by concave surfaces distributed on the upper end installation frame of the steel bar long side. The installation grooves set on the two long sides are opposite, The frame is facing the top of the reinforced installation frame. The cross-section is the same, and the lower end of the long side of the frame faces the installation slot to form a positioning slot. The installation slot is connected to the positioning slot one by one, forming a steel bar that matches the outer circle of the frame to form a rainwater grille. Strengthen installation space;
b. Apply release agent to the inner surface of the lower mold, the outer surface of the reinforcement mounting bracket, and the outer surface of the frame;
c. Cut the steel bars into appropriate lengths and apply anti rust paint on the outer surface of the steel bars, and install the steel bars in the installation groove on the steel bar installation bracket;
d. Prepare a steel reinforcement cage, which includes at least two main steel bars arranged side by side at intervals. The main steel bars are enclosed rectangular structures, and the distance between the two main steel bars located on the outer side is less than the height of the lower layer. When installing the steel cage, tilt one end of the steel cage downwards and hang the lower end on one end of the steel bar. Then push the steel cage towards the other end of the steel bar until the upper end of the steel cage faces the end of the steel bar. Above, then rotate one end of the upper end of the reinforcement cage to the inner side of the lower mold, push the reinforcement cage in the opposite direction, insert the other end of the reinforcement cage, and hang the reinforcement cage at both ends of the reinforcement cage to complete the reinforcement of the reinforcement cage;
e. Install the frame body on the top of the steel bar installation frame, and press the frame body onto the top of the steel bar installation frame;
f. Pour the concrete into the lower formwork and maintain the concrete. After the concrete solidifies, first take out the frame body, then flip and vibrate the lower formwork slightly, and then take out the lower formwork to obtain the rainwater grate.