Companies in brick manufacturing, mining, civil engineering, and contractors start involving into making precast concrete pipes for new business development. As beginners, you may wonder what kind of equipment would be appropriate for making concrete pipes. As dry casting plays a significant part in precast industry, I’m going to introduce several machines which are commonly used.
The first one, roller suspension machine.
Invented by engineer Roberston and Clark in 1943 in AU, the pipe forms under the pressure of the roller and the spinning force. This machine is popular for its simple structure and low investment. But as we can’t remove the mold instantly after production, we need a huge number of molds to improve the daily output. Does this sound cost-saving? You do the math.
The second one is the vertical vibration casting machine.
Invented by Pedershaab in Denmark. As the concrete forms into shape under the high-frequency vibration force of vibrators, the strength is excellent and mold can be removed immediately after production. It can also be used to make pipes with lining and irregular concrete products.
But the frequency of vibrator and the proportion of concrete are quite matters to the quality of finished product. Equipped with robotization facilities, the machine can be operated full-automatically.
The third and the last I want to introduce is Radial Press Concrete Pipe Machine
Developed by McCracken in 1940, with the rollerheader rotating in high speed, it forms the concrete in high frequency. The whole production plant can be designed to three shifts or more to meet mass production. The high investment of this machine is not the only reason why people take it as a second option. As it is not appropriate to make irregular product and pipe with lining.
And the wire cage may go deform during the spinning of the header.