4OMN Double Action Extrusion Press

A Pre-fill valve is mounted on the back of the main cylinder for fast flow of oil into and out of cylinder. Between pre-fill valve and oil tank there is a manual shut off valve, and a flexible coupling.

 Accessories

Blocks are set on the top of the oil tank.

They are made of forged steel. These blocks are ultrasonically tested. 

III. Hydraulic manifold blocks

Rexroth cartridge valves are used which are mounted in purposed designed  manifold blocks.

LED on each solenoid. 

DIN standard. 

Cartridge logic valves

Oil is pumped from the tank to the tank through a filters and plate cooling system, working on a continuous basis.

II. Cooling & filtration

Silent blocks are installed under the frames of the motor-pumps groups.

Pumps are set on steel frame at floor level.  

The main pumps are controlled by proportional valves with electronic cards controlled directly by the PLC via analog signals  0~10V. 

I. Main pumps

HYDRAULIC CHARACTERISTICS

The cover of the column is cast steel, the shape is multilateral, the guide steel above the cover used to afford the container (bearing steel), the thickness is min 50mm.

The pre-stressing of the columns is done under the maximum press force + 15%.

Pre stressing in done on casings (pre-stressed members) fitted between the rear and front platen.

Columns are screwed on each end.

Tie rods are made of forged steel. They are checked by ultra-sonic tests.

The Die Carriers will be electrically heated on the bottom area with rod type heaters built into the unit.

A die shuffle system is provided,which is attached to the platen. The Die Shuffle System utilises two Die Carriers where by one die is at the press centre line and another can be loaded at the side of the press. When a Die Change is required, the die at centre of press will travel out to the Shuffle System via the Die Slide Cylinder, and the New die will traverse parallel to press centre line to connect on to the Die Carriage (taking the place of the original die). The Die Carriage will then position the new die at the press centre line via the Die Slide Cylinder. This procedure can be automatically carried out at the end of extrusion cycle.

The die changing slide is moved by a hydraulic cylinder.

Die slide guides are made of bronze.

Platen thickness = 1000 mm.

Front platen is made of forged steel.

III. Front platen, tie rods and die changing device

Container cylinders are mounted in the main cylinder platen.

The rear platen is made of cast steel, all the surfaces will be machined .

II. Cylinder platen

Die slide cylinder is forged steel, with diameter 210mm, and cylinder rod: 180mm.

Shearing cylinder is forged steel, with diameter 220 mm, and cylinder rod: 180 mm.

Sealing cylinder is forged steel, with diameter 300mm, and cylinder rod: 160mm.

Piston head seals will be bronze impregnated triple wear ring design with two double acting sealing ring  between the three wear rings.

Side cylinder is forged steel, with diameter 300mm, and cylinder rod: 200mm. Side cylinders rod seals will be V type, chevron ring style.

Main cylinder stroke: 3000mm

The brand of main cylinder seal is Carco.

The main and auxiliary cylinders are inserted in the rear platen.

Piston is grinded and polished.

Piston diameter = 1270 mm. 

It is guided by bronze ring.

The piston is made of cast iron.

Ultrasonic and magnetoscopic checking of the cylinder will be done on 100% of the internal surface.

Main cylinder will be a forged and welded three piece structure, and shall be ultrasonically testing and all welds inspecting using die penetrant.

 I. Cylinders

MECHANICAL CHARACTERISTICS

time is dead time.                                       

4OMN Double Action Extrusion Press