Hydro Pneumatics System for Pet Moulding Machine, Manufacturer

We are Manufacturer, Supplier, Exporter of Hydro Pneumatic Products, Hydro Pneumatics System for Pet Moulding Machine - XA Series and Our setup is situated in Chpt. Sambhajinagar, Maharashtra, India.

Hydro Pneumatics System for Pet Moulding Machine - XA Series

1. General Description
1.1 The general layout of major pneumatic components used in stretch blow moulding machines is given in Fig 1.
'MERCURY" Series "XA" Hydro Pneumatic Clamping Systems use low cost pneumatic elements to achieve the large forces associated with pure hydraulic systems, with 50% saving in energy and 100% increase in speed over an equivalent hydraulic system.
The system has three stages of operation :-
(a) Initial Low force, Large travel, Rapid Approach.
(b) High Force, Short travel (typically 3mm), Power Stroke.
(c) Low Force, Rapid Retraction.

The selection of the correct system is very important for efficient performance. General guidelines is given in the appropriate sections. Please feel free to contact us for further guidance if required.

1.2 Sequence of Operation
(a) The heated perform is placed in the mould and the machine cycle is initiated by pressing 2 Hand Safety Push Buttons.
(b) The Series "XA" Clamp Cylinder closes the mould at High Speed with a low force (hence low compressed air consumption).
(c) Just 3 to 5mm before the two halves of the mould touch, the Cushion Solenoid Valve is switched "ON". This Cushions the closing of the mould and avoids banging and machine vibrati The rate of declaration can be varied by adjusting screw on Cushion Solenoid Valve.
(d) After the mould closes completely the Power Stroke Solenoid Valve of Series "XA" Cylinder is switched "ON" which causes the clamping pressure to increase to the required tonnage.
The mould is now held in the closed position by a very large force (e) The Neck Sealing Cylinder now moves down and seals the neck and Stretch Pin Cylinder extends to stretch the preform to the desired length.
(f) The low pressure solenoid of Dual Pressure Blow Solenoid Valve is switched "ON", causing initial stretch and blow at low force. After a delay the high pressure solenoid of a Dual Pressure Blow Solenoid Valve is switch "ON" for final blow and forming.
(g) After the set blow time, the air exhausts, and all cylinders retract rapidly.

NOTE The ideal cycle time is 5 to 7 seconds. This can be achieved by proper selection and location of valves and pipe fittings and tubing. Please feel free to contact us with your machine details to enable us to guide you correctly.

2. "XA" Hydro Pneumatic Press System
The Series "XA" System has been developed for applications where the cylinder has to be mounted horizontally.
Refer to Fig. 2 for Piping Layout, Fig. 3 for Pneumatic Circuit and Fig. 4 for overall dimensions and Fig. 5 for cut section details and spare parts list.
The system consists of a Hydraulic Cylinder and an Air to Oil Intensifier unit assembled as an integral unit. The Oil Reservoir is mounted vertically and cn-lpled to the hydraulic cylinder through a suitable low pressure hydraulic hose. Alternatively, to achieve high speed and less heating of oil, the reservoir can be mounted vertically and Port "X" through a suitable connector.
An optional Cushion Solenoid Valve can be fitted in the oil line between the Reservoir and the Hydraulic Cylinder Port "X" to decelerate and close the moulds without jerks and vibration.

2.1 Sequence of Operation
(a) When the Approach Solenoid Valve is switched "ON", air is admitted to Port 'A' and exhausted from 'B' and port 'D'. The Output Shaft extends rapidly, with a low force, due to air pressure acting on reservoir piston through port 'C'.
(b) When the two halves of the mould are about to close, the Cushion Solenoid Valve is switched "ON". This cause the main oil flow from Reservoir to the Hydraulic Cylinder to shut and the oil is made to flow slowly through an adjustable Flow Control Valve incorporated in the Cushion Solenoid Valve. The Cylinder movement is thus decelerated and the mould closes slowly without a bang.
(c) When the moulds close fully, the Power Stroke Solenoid Valve is switched "ON". This causes regulated air to be admitted to port 'A'. The Intensifier Piston now moves forward and oil pressure in the Hydraulic Cylinder is increased by approximately 25 times the regulated air pressure. This high pressure oil now acts on the large diameter Hydraulic Cylinder to give the large clamping force. The clamping force can be varied by adjusting Air Pressure Regulated 'R'
(d) After the machine cycle is over all the Solenoid Valves are switched "OFF", causing air to be admitted to Port 'B' and Port 'D' and exhausted from port 'A' and port 'C'. The Cylinder retracts rapidly.
(e) To avoid vibration during mould opening, the Cushion Solenoid Valve can be switched "ON" just before the mould opens fully.