#VarnishingMachines

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Trickle Impregnation Technique Manufacturer In India - ARENGG.CO.IN

According to the principle of Trickle Impregnation, activated resin is trickled in a thin jet on to the rotating preheated winding. The resin immediately gets heated and its viscosity is reduced. Trickle Impregnation Technique ,Varnishing Machines, Batch Type Trickle Impregnating Machine , Index Type Trickle Impregnating Machine , Vacuum / Pressure Impregnation Plants Manufacturer Exporter, Supplier, Satara, Maharashtra, India

Trickle Impregnation Technique :

According to the principle of Trickle Impregnation, activated resin is trickled in a thin jet on to the rotating preheated winding. The resin immediately gets heated and its viscosity is reduced. Due to the rotary motion of the winding the resin gets distributed evenly inside the winding without any drain loss. The heated winding accelerates the gelling and curing of the resin. The resin applied on the winding is quickly sucked through the slots. Assisted by the capillary action it pushes out the trapped air from the small voids and gaps in the winding and penetrates evenly in all the voids. The essential point for successful application of the trickle impregnating resin is the correct adjustment and the control of the winding temperature.

Advantages of Trickle Impregnation : Trickle impregnation process is especially characterized by its low energy cost due to a very short cycle time compared to Dip varnishing or the Vacuum impregnation. Compared to the Dip and bake varnishing method, which uses varnishes containing 50 to 55% solvents and the impregnation cycle of 8 hrs to 24 hrs. Trickle impregnation cycle times are substantially low to the tune of 20 min. to 40 min. Hence it is quite evident that trickle impregnation process offers the most cost economical answer to the impregnation process.

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Vacuum Impregnation Plants & Pressure Impregnation Plants Manufacturer In India

Vacuum Impregnation Plants & Pressure Impregnation Plants Manufacturer In India

TECHNICAL SPECIFICATIONS

Vacuum Impregnation Plants and Pressure Impregnation Plants is designed for varnish impregnation to be carried out in following steps and will be generally as per the schematic diagram attached.

Pre-heating the jobs in either Impregnation Chamber or in Oven if you have a less time available.Evacuation of Impregnation Chamber (after putting the jobs) to make the voids in the jobs clear and drying of jobs for specific time & required temperature / vacuum.

Induction of impregnant (Varnish) in the Impregnation Chamber from impregnant Tank to submerge the jobs in it.

Pressurize the Impregnation Chamber with dry air or nitrogen to fill the voids with Impregnant.

Return the varnish to Impregnant Tank.

Cure the jobs either in Impregnation Chamber or in Oven for specific time if time available is less.

The plant will be generally as per the schematic diagram attached herewith and will mainly consist of following major components:IMPREGNATION CHEMBER:

Chamber Dimensions: Diameter – Ø --- mm, Height  ---- mm (suitable for jobs)

Material of construction: MS plates, bars, structural etc.

Working Pressure: 1- 4 kg / cm2 & Vacuum: 0.1 / 1 / 10 / 50 torr

Lid Opening: Screw Davit type for quick opening & closing or hydraulic operated automatic

Temperature control: With Thermostat or digital TIC

Will be provided with: Oil Heating / cooling Jacket, Quick Clamping bolts, Stirrer, Neoprene Gaskets, Sight glass, Illuminating Lamp, Pressure Safety Valve, Vacuum & Pressure gauges etc. as per the varnish specifications.

IMPREGNANT STORAGE TANK :Material of Construction: M.S. plates, bars, structurals etc

Varnish Tank Capacity: 50 - 80% of Impregnation chamber.

Will be provided with: Level Indicator, Motorised Stirrer, TIC to indicate and control the varnish temperature, Return Line Filter to prevent entry of impurities carried away from impregnation chamber to storage tank and suitable drain. Silica Gel Breather will also be provided to prevent absorption of atmospheric moisture.

VACUUM SYSTEM :

Type: Rotary Oil sealed Vacuum Pump or Roots – Rotary combination.

Capacity (free air displacement): 50 LPM to 1600 Mᵌ/hr.

Ultimate Vacuum with G. B. Closed - 0.005 torr  to 0.0001 torr.

Make: Indowoosung, Everest, Doftel or reputed Make

Working Vacuum – 0.1 / 1 / 10 / 50 torr

Condenser: Water-cooled. (Water cooling system optional)

COMPRESSOR :

Type: Piston Type

Free air displacement: 10 CFM

Working Pressure: 4 Kgf/cm2

Make: Reputed make

In case of low vacuum/pressure impregnation, combined vacuum/pressure pump can be used

IMPREGNANT TRANSFER SYSTEM :Interconnecting pipes: M.S. ERW, B Class or SS in case of resin impregnation.

Valves: Piston Type (Vacuum tight with O'rings & Nylon wipers) OR Ball valves with Teflon seals ( manual or tuated )

Connections: Flanged type with Neoprene O'rings.

Operating Platform: M.S. Fabricated suitable for easy plant operation in case of big plants.

CONTROL PANEL:Centralized Control panel for easy and safe operation will be provided along with necessary gauges and controls.

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Vacuum Pressure Impregnation Plant,Pressure Impregnation Plant,Vacuum Impregnation Plant Suppliers India

Vacuum Pressure Impregnation Plant

Vacuum Pressure Impregnation (VPI) is a process that uses vacuum and pressure to seal porous materials with varnish or resin. The process is used primarily for high-voltage motors and generators to fill gaps in materials to create a void free insulation in various devices. ​

The Vacuum Pressure Impregnation Process :

AR EENGINEERING specializes in vacuum pressure impregnation, which is more effective than traditional dip-and-bake methods and is better suited to high voltage motors and generators. Our basic vacuum pressure impregnation motor repair process comprises several steps.

Preheating : We place the equipment in an oven that heats the equipment and allows moisture to evaporate. This helps the resin better penetrate the material.

Vacuum Drying : We remove the equipment from the oven and place it into a vacuum chamber, which removes air and any remaining moisture.

Filling : We fill the chamber with resin, coating the part and filling in all the gaps and pores in the piece of equipment.

Wet Vacuuming : We reduce the vacuum levels and hold it for a set period of time.

Pressure/Soaking : We increase pressure within the chamber using dry air, nitrogen, or other gases. This allows for even deeper penetration of the resin.

Draining : We then vent the pressure, drain the chamber of excess resin, and remove the part.

Curing : Finally, the equipment is placed into an oven to cure the resin.

Impregnation Types :

Varnish Impregnation

Oil Impregnation

Casting Impregnation

The Benefits of VPI :

In traditional impregnation, varnishes can lose up to 50% of their volume in the curing process. The reduced volume leads to air pockets and gaps, making it more susceptible to damage and wear. The vacuum used in a VPI creates a more solid structure that can withstand:​

Leaks

Cracks

Corrosion

Moisture

VPI also accommodates longer insulation life and greater heat dissipation. Vacuum pressure impregnation is a more cost-effective solution as it extends the lifetime of products while saving energy.​SpecificationsTypeVacuum Pressure Impregnation Plants

UseSealing Meterials

Weight1000-2000kg

ColorBlack

Voltage110V

ConditionNew

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Index Type Trickle Impregnating Machine Manufacturer In India - ARENGG.CO.IN

Index Type Trickle Impregnating Machine Manufacturer 

Trickle Impregnating Machines are suitable for automatic impregnating of stators and rotors by trickle process. Stators and Rotors are heated to pre-determined temperature and then trickled with varnish (Resin + Hardener) and cured until it hardens. They are then ready for unloading manually. They are rotated by chain drive which rotates the spindles mounted on rotating / indexing table at an appropriate speed suitable for trickling. Indexing Table is rotated by motor with gear box and limit or proximity switches.

Job indexing system : Index table is mounted on a spindle placed in fabricated box containing main spindle bearings. It is indexed with the help of brake motor, gearbox, chain, and main spindle. The index position is ensured by spring loaded index pin operated by pneumatic cylinder, proxy switch, reed switch & PLC.Job rotation system : Rotating spindles are mounted on the index table driven by electric motor, gearbox, chain and sprockets. An arrangement is provided such that when jobs come to loading - unloading station, spindles stop rotating for easy removal and placement.Heating system : Stators and Rotors are pre heated and cured while passing through the pre heating zone and post heating zone. Radiation type electric heaters do heating in pre-heating and curing zone with temperature control by Digital Temperature Indicating Controller with proportionate temperature control. Both the zones are insulated with glass wool to minimize heat loss. Both the zones are lined with reflective aluminum sheet backed by asbestos cloth for efficient heat reflection and distribution.Varnish feeding system : Varnish is fed by peristaltic tube pumps driven by D.C. motors with variable speed control to control varnish quantity according to the models. Pneumatic tube positioning system is provided for proper varnish feeding. Total cycle is automatic except for loading and unloading.Centralized control panel : is provided for complete preset automatic operation cycle except for loading and unloading. It is provided with cycle parameters settings such as pre-heating and curing temperature, varnish quantity, trickle time, total cycle time, etc. The PLC is provided to control the operation of the machine in proper sequence and safety.