Blow moulding machine comprising control valves
Blow moulding machine comprising control valves
A blow moulding machine with at least one blow moulding for producing hollow bodies from heated performs, at least one blow nozzle for leading the blow air into the performs and a plurality of valves for controlling the feeding and the removal of the blow air to and from the blow nozzle, whereby the valves are arranged on an annular valve carrier surrounding the blow nozzle, resulting in a compact design with short cycle times.
FIELD OF THE INVENTION
The invention pertains to a blow molding machine such as for forming beverage containers.
BACKGROUND OF THE INVENTION
Various designs of blow moulding machines of this type are known, with or without a mechanical stretching member, in which the usually tubular or bell-shaped blow nozzle can be applied in a gastight manner directly to the orifice of a preform or a transfer mandrel carrying a preform, for example. In the known blow mouldinging machines, the control valves for low pressure blow air, high pressure blow air, venting, etc., are arranged in the blow mouldinging machine at some distance from the blow nozzle.
SUMMARY OF THE INVENTION
The invention undertakes to remedy the aforementioned situation and to provide a bottle blow moulding machine which can work with very short cycle times.
On the one hand, the integration of the blow nozzle and the valves according to the invention facilitates extremely short flow distances and thus short control times. On the other hand, the annular arrangement of the valves provides sufficient room for large valves despite the compact design of the ˇ°control blockˇ± according to the invention.
A particularly compact design with optimal flow cross-sections is achieved when, according to the advantageous further developments of the invention, the circumference of the valve carrier is essentially rectangular, and a low pressure valve, a high pressure valve and two venting valves are arranged at the two opposing sides of the circumference of said valve carrier.
According to another advantageous further development of the invention, the valve carrier is stationary and the blow nozzle is arranged in the blow mouldinging machine in a longitudinally movable fashion, whereby the feeding and removing of the blow air is carried out via corresponding holes in the valve carrier and/or in the blow nozzle.
Other advantageous further developments of the blow moulding machines are specified in the remaining subclaims.
A blow moulding machine with at least one blow moulding for producing hollow bodies from heated performs, at least one blow nozzle for leading the blow air into the performs and a plurality of valves for controlling the feeding and the removal of the blow air to and from the blow nozzle, whereby the valves are arranged on an annular valve carrier surrounding the blow nozzle, resulting in a compact design with short cycle times.
FIELD OF THE INVENTION
The invention pertains to a blow molding machine such as for forming beverage containers.
BACKGROUND OF THE INVENTION
Various designs of blow moulding machines of this type are known, with or without a mechanical stretching member, in which the usually tubular or bell-shaped blow nozzle can be applied in a gastight manner directly to the orifice of a preform or a transfer mandrel carrying a preform, for example. In the known blow mouldinging machines, the control valves for low pressure blow air, high pressure blow air, venting, etc., are arranged in the blow mouldinging machine at some distance from the blow nozzle.
SUMMARY OF THE INVENTION
The invention undertakes to remedy the aforementioned situation and to provide a bottle blow moulding machine which can work with very short cycle times.
On the one hand, the integration of the blow nozzle and the valves according to the invention facilitates extremely short flow distances and thus short control times. On the other hand, the annular arrangement of the valves provides sufficient room for large valves despite the compact design of the ˇ°control blockˇ± according to the invention.
A particularly compact design with optimal flow cross-sections is achieved when, according to the advantageous further developments of the invention, the circumference of the valve carrier is essentially rectangular, and a low pressure valve, a high pressure valve and two venting valves are arranged at the two opposing sides of the circumference of said valve carrier.
According to another advantageous further development of the invention, the valve carrier is stationary and the blow nozzle is arranged in the blow mouldinging machine in a longitudinally movable fashion, whereby the feeding and removing of the blow air is carried out via corresponding holes in the valve carrier and/or in the blow nozzle.
Other advantageous further developments of the blow moulding machines are specified in the remaining subclaims.