Specific Engineering Corporation Pvt. Ltd.

MIDC, Mumbai, Maharashtra

Technical Description

The SBV Bladder presses are designed especially for manufacturing and curing the bladders use in the AUBO, BOM & AUTOFORM presses.

The control of hydraulic system included in the equipment is designed such that the lower mould half carrying the uncured rubber approaches the upper mould half with high velocity during the first closing stage, reducing the total closing period to minimum.

In the beginning of the pressing operation, the closing speed is slackened automatically in order to obtain slow and uniform compression of uncured material.

After laps of the curing time, the press opens up automatically and the bladders for AUBO and BOM presses are removed from the lower core plate. The bladders for AUTOFORM presses are detached by a pneumatic device which is included in the delivery on request.

The moulds which are generally executed according to customers drawings are made of high grade steel. The two external mould portions and the core are cured by a direct steam connection.

The presses and hydraulic power unit are delivered, complete and ready for connection, excluding curing platens. A timer for automatic press opening after termination of the curing period as well as steam and condensate piping are normal features of supply. Supervision of erection, installation and commissioning.

The press is complete with all ancillaries necessary for the proper function of the bladder moulding operation and provided with terminations for appropriate connection by others to the battery limits of site services.

The press is equipped with a mould lifting fixture and removable mould roll-in, roll-out table to facilitate mould changing.

All components of the press structure, hydraulic system and associated items of the plant are designed so as to safely carry all loads imposed by the use of the press moulding Tyre press bladders and rated for the maximum design press closing force.

The press structure is designed to safely carry a normally imposed load of at least 15% excess of the designed maximum closing force.

The hydraulic system is designed so as to deliver a maximum of 5% excess of closing force above the design maximum closing force.

All electrical equipment is suitable for connection to the site electricity supply at 440 volts, 3 phase & neutral 50 Hz, control voltage to be 110 volts, 50 Hz, single phase from panel transformer.

One hydraulically operated bladder moulding press complete with main RAM for applying varying press closing forces & auxiliary RAM systems for mould core and ring movements together with means of locating and retaining mould cores, upper & lower mould halves in the press and suitable for a range of tyre press bladder mould sizes up to the maximum sizes and rated for the maximum design press closing force.

One electric motor driven hydraulic power unit continuously rated to provide varying press closing forces for moulding.

One complete press control system complete with all valves, controls, instruments, gauges and actuators necessary for the safe operation of the press and the control of the moulding operation including recording of cure cycle time, temperature & operating parameters recording when moulding a range of tire press bladders.

One Electrical control cabinet to house all items associated with electrical control system complete.

One set of compressed air pipe work and fittings for supply of air requirements which is to include air rectification units to remove fine entrained contaminants and droplets, an air receiver to continue the operation in the event of a compressed air supply failure & for removal of cured bladder at the end of cure, pressure regulation to the requirements of recorder / controller is to be provided together, the site battery compressed air limit at (7) kg / cm3.

All necessary drawings, details and general assistance to enable others to prepare foundations & other installation requirements will be provided with the machine.

Spare parts list for normal two years operation.

Training of three engineers (operation, maintenance, quality control).

The supervision of erection, installation and commissioning will be provided at an additional cost.

We guarantee that the equipment when correctly mounted properly operated and maintained, shall give satisfactory performance for a period of 12 months from the date of start-up.

1 Man Machine Interface with 10 different program storage capacities for different sizes of tube reducing the product change over time to virtually zero.

2 Auto Diagnostic fault detector screen with hooter arrangement reducing the machine down time.

3 Digital heat and speed controls and indication through PLC by Man Machine Interface in auto mode (and pot in manual mode for initial setting only).

4 Three speed knives control (creep / slow / fast) with synchronized three heats (medium / high / low).

5 The knives entry and exit speed heat can be controlled from 0 to 9.99 sec with heat and speed change over adjustable within 1/100th of a second.

6 Man Machine Interface with display and print out.

7 24 hrs history for:

1. Break up of production with cycle change over
2. Faulty / Diagnostic messages for : knife drop / raise / forward / reverse, power pack oil temp high, pump on / off etc., butting in/out, knife temp high/low than set value

8 The hydraulic power pack is developed & assembled indigenously with imported pump, solenoid valves & proportional control valves of parker make (or equivalent to customer need can be provided)

9 The electronic and PLC system with Man Machine Interface is only of Allyn Bradely USA with service back up anywhere in India by Allyn Bradely USA or its Franchise (or equivalent make to customer need can be provided).

There is compatibility of spares holding through the SPECIFICs splicer range. All Splicing Machines can be tailor made to a specific user requirement. The standard SPECIFICs range of Inner tube Splicing Machine joins butyl, natural rubber or natural rubber and SBR blends from bicycle to heavy off the road tubes.The machines for the production of heat curing bags can be made to order. The machines have been designed to be simple and can be operated by unskilled labour.