Cooling device for iron pipe centrifugal casting machine

A structure comprising in combination a machine for centrifugally casting iron pipes and comprising a rotary mould having an axis of rotation, means for pouring iron into the mould which pouring is achieved by a relative axial movement between said pouring means and the mould, a device for cooling the mould, said device comprising in combination a first cooling water supply pipe, a first valve in the first cooling water supply pipe, cooling water spraying systems connected to the first cooling water supply pipe and extending throughout a length of the mould required to be cooled and capable of supplying cooling water normally required for cooling the mould and an additional cooling water spraying means for spraying any additional localized cooling water found to be required to achieve a cooling of the mould which is substantially uniform throughout said length of the mould, said additional cooling water spraying means comprising a guide bar parallel to the axis of the mould, a slide slidably mounted on the bar to be movable independently of said relative movement between the mould and pouring means merely for purposes of adjustment of the slide to a desired fixed position relative to the mould axially of the mould which position remains fixed for each and during each cooling operation, and a second cooling water supply pipe, a second valve in the second cooling water supply pipe, and a local cooling water spraying element carried by the slide and connected to the second cooling water supply pipe and having a length less than said length of mould required to be cooled so as to spray said additional cooling water onto only a selected fixed fractional part of said length of the mould, a support movable with respect to the mould, a photoelectric cell which is responsive to infrared radiations and carried by the support and directed toward the surface of the mould, said second valve means associated with the additional water spraying element for controlling the supply of water to the additional water spraying element also associated with the photoelectric cell to be controlled in accordance with the infrared radiations detected by the photoelectric cell, the second valve being operative independently of the first valve.

A device for cooling a rotary mould having an axis of rotation of a machine for centrifugally casting iron pipes, which machine includes means for pouring iron into the mould, which pouring is accompanied by a relative axial movement between the mould and pouring means, said device comprising in combination a first cooling water supply pipe, a first valve in the first cooling water supply pipe, cooling water spraying systems connected to the first cooling water supply pipe and extending throughout a length of the mould required to be cooled and capable of supplying cooling water normally required for cooling the mould and an additional cooling water spraying means for spraying any additional localized

• cooling water found to be required to achieve a cooling of the mould which is substantially uniform throughout said length of the mould, said additional cooling water spraying means comprising a second cooling water supply pipe, a second valve in the second cooling water supply pipe, and a local cooling water spraying element connected to the second cooling water supply pipe and having a length less than said length of mould required to be cooled so as to spray water onto only a selected fixed fractional part of said length of the mould, the additional water spraying element being adjustable in position axially of the mould independently of said relative movement between the mould and said pouring means, and means operatively associated with the local water spray element for holding the local water spraying element in a fixed adjusted position axially of the mould during the cooling of the mould so that said fixed part of said length of the mould is supplied with additional water during cooling, the second valve being operative independently of the first valve.