芯模振荡成型工艺的维护小好方法 Small maintenance method for cement pipe core mold vibration forming process
Compared with the traditional centrifugal, suspension roller and plug-in oscillation processes, the production process of the core mould of the cement pipe is significantly improved in mechanization and production power. The geometric dimensions of the cement pipe produced by the core mould oscillation equipment are accurate, and the steel socket pipe and the enterprise pipe are The joint products are dense and the quality of the cement pipe is less, which solves the common problems of centrifugal process, suspension roll process socket manufacturing difficulties, and uneven wall thickness. There are many advantages to manufacturing cement pipes by the core mold vibration molding process. The maintenance of the drainage pipes manufactured by the core mold vibration molding process is divided into three conditions: hood maintenance, steam maintenance, and outdoor maintenance. The following is a detailed description of the cement pipe manufacturer's small maintenance method of the core mold vibration molding process.
First, a small and good way to maintain the cement tube of the core mold vibration molding process
The maintenance of the drainage pipe manufactured by the core mold oscillation molding process is divided into three conditions: hood maintenance, steam maintenance, and outdoor maintenance.
1. Hood maintenance
Cover the manufactured stern tube with a special maintenance cover, without steam, and rely on its own cement hydration heat for maintenance; when the cover is maintained, the temperature should be based on the outdoor temperature, and material changes should be considered by the laboratory based on the actual measured strength of the stern tube. In general, you can refer to the following table:
Outdoor temperature hood maintenance time:
0 ℃ －10 ℃ ≥24h
10 ℃ -20 ℃ ≥18h
Above 20 ℃ ≥14h
Small maintenance method for cement pipe core mold vibration forming process
After the finished stern tube is covered with a special maintenance cover, steam is used for maintenance. The maintenance is divided into four phases: static stop, heating, constant temperature, and cooling. The detailed and reasonable time of each phase should be proposed by the laboratory. Generally Under the circumstances, you can also refer to the following steaming guidelines.
(1) Static stop: the outdoor temperature is above 20 ℃, not less than 1h; when the outdoor temperature is 5 ℃ -20 ℃, it is not less than 1.5h.
(2) Temperature rise: The temperature rise rate should not be too fast and should be controlled within 25 ° C / 1h.
(3) Constant temperature: The high temperature should not exceed 85 ° C. The determination at this moment should be based on the principle that the strength of the concrete reaches the demolding strength, generally not less than 3h.
(4) Cooling down: When the cover is uncovered, the temperature and the external temperature are not greater than 30 ° C.
Maintenance personnel should measure the temperature of the maintenance cover every hour and make a record, and adjust the amount of steam at any time based on the temperature measurement results.
3. Outdoor maintenance
Regarding the time when the drain pipe after steam maintenance and hood maintenance is stored in the open air, the drain pipe should be maintained by watering according to the climatic conditions, and the maintenance period should be no less than 7 days.