Three-Station Fully Automatic Centrifugal Casting Machine

summary
   Three-station fully automatic centrifugal casting machine adopts the three hosts+ multi station auxiliary integrated structure. The three hosts which control by VFD are in parallel arrangement. The three hosts share a set of auxiliary equipment and casting device. Auxiliary equipment control by servo and include cleaning, spraying, pouring, cooling, pulling pipe. The whole process control automatically.
   The main machine's speed is adjustable and steady in the high speed. It is advanced spraying technology in multistage and multispeed. The critical technical parameters are monitored and adjusted in the process of casting, which ensure the casting technical parameters repetition and consistency. It eliminates the influence of artificial factors to the casting technical parameters. So it ensures the intrinsic quality of the casing casting stability
    The equipment has less area, more production efficiency and fully automatic operation. All of these are very suit for Single species and large quantities of cylinder liner rough casting's continuous production.
Features
1. High-speed and stable running of the main machine
The running stability and the rotation speed of the tube molds are the key factors affecting the quality of the product. Therefore, the requirement of stability in the running of the main machine is very high. In high-speed operation, the smaller the radial run-out of the tube molds is, the more uniform the wall thickness of cylinder liner will be, and also the more stable the structure performance will be.
The main machine adopts four supporting wheel structure with the bearing base adopting cast iron material, so it has a good shock absorption capacity. The surfaces of the supporting wheels are processed with hardening and fine grinding processes. By adopting AC stepless frequency conversion motor and high performance vector control converter and by driving the supporting wheel to rotate by the high performance V belt, the precise speed control of the tube molds can be guaranteed and regenerative braking system can ensure the fast stop of the tube molds. So the productivity can be improved. 
2. Accurate locating control of the auxiliary machine
Cleaning, spraying and tube drawing mechanisms are compactly arranged on the mobile platforms. Through the position shift of the mobile platforms, the working positions of the three auxiliary machines, namely cleaning machine, spraying machine, and tube drawing machine, can be switched. By adopting servo positioning control method to control the action position and speed of spraying, tube drawing and mobile platforms, the high-speed and accurate positioning of the auxiliary machines can be achieved, which can meet the strict requirements of the processes and shorten the operating time, thus improving work efficiency. 
3. Excellent spray coating quality
The inner coating of the tube molds can reduce the impact of metal liquid on the tube molds and reduce the peak temperature of the tube molds, which can effectively prolong the service life of the tube molds, increase the friction force between the tube molds and liquid metal, shorten the time of the pour-in metal liquid to achieve the tube rotation speed, and also facilitate the casting pieces to release from the molds in tube drawing process.
The spray rod movement adopts servo control, which can stabilize the rod moving and make the rod positions adjustable, thus ensuring the uniformity of the coatings. The moving speed of the spraying rod can be divided into three adjustable phases, each of which can be adjusted in moving distance and moving speed to cooperate with the rotation speed of the tube molds and the spraying pressure to meet the requirements of a variety of complex spraying processes.
4. The real-time monitoring of the temperature of the tube molds and the spray water cooling
The mold temperature has a very big influence on the quality of the cylinder liner, in particular, on the metallographic structure and the hardness of the cylinder liner. If the mold temperature is too high, the wet paint shall inflames, which can cause uneven coatings, and the surface quality of the cylinder liner can't be guaranteed, and the service life of the molds shall be shortened; If the mold temperature is too low, the pouring paint can't dry out completely, the bubbles are not easy to dissolve out completely  before the casting process; when the molten iron of high temperature meets the wet paint, the casting defects such as the white casts and air pores are likely to occur to the cylinder liner.
The infrared temperature measuring device is configured to detect the real-time temperature of the three sections of the outer surface of the tubes molds, and which can display the temperature of the three sections at the man-machine interface. The cooling nozzles are evenly arranged in the axial direction above the tube molds, which can spray the cooling water to the outer wall of the tube molds as per the parameters of cooling time set-up so that the tube mold temperature can be controlled in the appropriate technology range. 
5. Accurate and reliable tube drawing mechanism 
The mechanism adopts the control method of pneumatic servo system, which can pull out the castings of cylinder liner smoothly from the tube molds. The position and speed of the tube drawing can be set up and adjusted.
6. Castings automatic handling mechanism
The servo control is adopted by castings handling mechanism for automatically and smoothly sending the cast cylinder liner from pulling-out position onto the conveying roller table.
7. Automatic pouring and accurate weighing of molten iron
Automatic pouring device is composed of pouring vehicle, pouring ladle, etc. Pouring vehicle can serve two host machines for pouring on a time division basis. Inclining and pouring speed of the ladle can be adjusted. The automatic weighing device for the molten iron is equipped with the pouring ladle to ensure the consistency of the weight for each batch of cylinders. The weight of the molten iron in the ladle can be displayed on the big screen and the records can be printed.
8. High efficiency, safe, stable, and flexible automatic control electrical system
Control system use PLC as the control core and use the man-machine interface as the monitoring system to achieve whole process automatic control of centrifugal casting machine and production process monitoring. Control system has the perfect protective measures, such as over-current protection, over-load protection, etc.  The process parameters of the host machine and the parameters of the auxiliary machine, such as work positions and velocity, can be adjusted and stored in the man-machine interface, which enables the equipment to have certain flexibility and meet the production process requirement of a variety of cylinder liner castings in a certain range.
 
Main technical parameters 

name of parameter	parameter values	unit
Casting diameter	Ø70~Ø100	mm
Casting maximum length	1600	mm
Riding wheel diameter	Ø250X70	mm
Two riding wheel outer span	860	mm
Two roller radial spacing	330	mm
The host spacing	800	mm
Speed of mold	0~2000	rpm
Centrifugal machine power motor	7.5	Kw