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Problems and solutions of core mold vibration pipe making machine
Publish Time：
2022-08-05 09:38
Problems and Solutions of Core Mold Vibration Pipe Making Machine
In recent years, vibration pipe making machine technology and equipment have been rapidly promoted and applied in China. Its production process uses advanced mold forms, high production efficiency, and good product quality have been unanimously recognized by the industry, improving the technical level and market share of China's steel bar concrete drainage products. Although the core mold vibration pipe manufacturing process equipment has been rapidly promoted in China, due to the uneven management level, personnel quality, and technical level of various production enterprises, and different process quality control methods, the product quality has not reached the ideal level.
Problems and Solutions of Core Mold Vibration Pipe Making Machine
In recent years, vibration pipe machine technology and equipment have been rapidly promoted and applied domestically. Its production process uses advanced mold forms, high production efficiency, and good product quality, which has been unanimously recognized by the industry, improving the technical level and market share of China's steel bar concrete drainage products. Although the core mold vibration pipe manufacturing process equipment has been rapidly promoted domestically, due to the uneven management level, personnel quality, and technical level of various production enterprises, and different process quality control methods, the product quality has not reached the ideal level.
First, the existing problems
The pipe specifications produced by the double-station core mold vibration cement pipe machine are (φ1000~φ1200) mm × 2500 mm (socket), (φ1350~φ3000) mm × 2500 mm (seasoning). In the trial production stage, due to the operators' unfamiliarity with the production process and equipment performance, there are some product quality problems, mainly reflected in the following aspects.
200~300mm from the core mold vibration distance to the spigot end, the inner and outer walls of the pipe are prone to intermittent annular cracks. There are many honeycomb-shaped and pitted surfaces 500mm from the cap end. The (φ1000~φ1200) mm × 2500 mm concrete pipe pier section is prone to collapse during demolding. The core mold vibration bearing seat has poor forming quality and is prone to cracks, annular cracks, and deformation.
Secondly, solutions
Core mold vibration annular crack problem
(1) Main reasons: ① The skeleton does not meet the requirements. The overall rigidity is poor, the longitudinal reinforcement is too long, the longitudinal reinforcement diameter is too small, the end support card is too tight, and the ring reinforcement at both ends is not tightly wound; ② When removing the inner and outer molds, the crane center line is offset; ③ The product storage area in the workshop is uneven; (4) The horizontality deviation of the equipment frame and the vertical deviation of the core mold and outer mold installation are large; ⑤ The crushing pressure is too large, and the crushing operation is improper.
(2) Improvement measures: ① Strictly control the quality of skeleton production. To enhance the overall rigidity of the skeleton, cold-drawn wire with a diameter larger than that of the ring reinforcement is used for the longitudinal reinforcement, and the uniform longitudinal reinforcement length is 2470mm. Start winding 5 laps at 150mm from both ends of the ring reinforcement; even if there is no support card at 250mm from the socket, try to reduce it; stipulate that the assembly of the inner and outer ring rods should be carried out on the assembly table to ensure the flatness of the upper and lower surfaces of the skeleton and no convex points; (2) Ensure that the vertical installation accuracy of the core mold and the equipment outer mold is controlled within 2mm; ③ Strictly require the driver to accurately raise and lower the point under the command of the ground personnel when operating the disassembly of the inner and outer modes, gently raise and lower, and there must be no deviation or shaking; ④ Products in the workshop are placed on a horizontal ground, and the horizontal deviation is controlled within 10mm; ⑤ Reasonable rolling pressure of the pipe type, strict rolling pressure and rubbing pressure operation procedures, the rubbing pressure time is generally completed within 2 minutes, fast rubbing and slow pressing, and try not to repeat rubbing pressure.
(3) Improvement effect: After operating according to the above measures, the annular cracks on the pipe wall are basically eliminated.
Die vibration
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