Welcome to the definitive guide to maintaining and enhancing your rotary textile printing operations. R.A. Industries, a trusted name based in Ahmedabad-26, India, specializes in the manufacturing of Rotary Screen Printing machinery and essential Textile Machinery Spare Parts¹¹¹¹. Whether you are setting up a new line or looking to optimize an existing one, understanding the function of each component is key to achieving flawless, high-speed production.

Below, we dive into the core components offered, categorized for easy reference.

I. The Rotary Screen Printing Section: The Heart of the Machine

The core of the process is the Rotary Screen Printing Section, an assembly that performs the actual printing. Proper functioning requires numerous precision parts.

A. Color Feeding and Application System

This system ensures the accurate and consistent supply of printing paste to the screen:

Color Pumps: Essential for circulating and supplying the color paste. R.A. Industries offers several variations:
- Laxmi type color pump – Standard and Heavy Duty.
- Stork/Zimmer type.
- Standard/Heavy Duty.
Pichakari / S.S. Pichakari Assembly (Jumper): Likely a component used for ink or color application/transfer.
Magnet Rods: Available in plain, knurled, and hollow types, with diameters ranging from 6 to 30 mm.
Magnet Beam & Accessories:
- Electric Magnet Beam.
- Magnet Beam Support Bracket.
- S.S. Magnet Beam Cover.
Color Level Probe (RA-58): A crucial sensor for monitoring and maintaining consistent color levels¹².
Color Feeding Pipe Assembly: Specifically for square pipes.
Pump Nipple (RA-11): Connects the pump to the system.

B. Screen Alignment and Tension Components

Achieving a perfect print requires precise screen alignment and tension, which is handled by specialized assemblies:

Screen Setting Assemblies: Used to set the screen’s position on the machine.
- Screen Setting Assembly (RA-29 & RA-30)¹⁵.
- Universal Screen Setting Assembly (RA-31)¹⁶.
- Universal Screen Setting Assembly Bracket: Available for $90 \text{ mm}$ and $115 \text{ mm}$ centers¹⁷¹⁷¹⁷¹⁷.
Screen End Rings: Available for all repeats, including the specialized Laxmi type end ring repeat gear¹⁸¹⁸¹⁸¹⁸.
Screen Guide Components:
- Screen Guide Bearing and Pin (RA-14).
- Screen Guide Bearing Bracket: Stapler Type (RA-35).
Screen Tension Components:
- Screen Tension Bearing (RA-13).
- Screen Tension Cylinder.
Rod Guide Bracket (RA-09): Supports the magnet rod²³²³²³²³.
Probe Holder (RA-10): Holds the color level probe²⁴²⁴²⁴²⁴.
Diagonal Setting Assembly (RA-20A) & U-Block for Sq. Pipe Setting (RA-20B): Used for precise diagonal alignment²⁵.

II. Drive, Gearbox, and Transmission Components

The drive mechanism powers the printing process, requiring robust and accurate gears and assemblies.

A. Gearboxes and Main Shafts

Duplex Gearbox Type:
- Complete Duplex Gear Box Assembly (RA-37).
- Main Shaft Duplex Gear Box Type (RA-38).
- Gear Set: $88 \text{T}/31 \text{T}$ gear set for the main gear box (RA-39).
Screen Drive Gearbox:
- Screen Drive Gear Box Assembly.
- Worm and Worm Wheel for screen drive gear box.
- Cam for screen drive gear box.
Main Gearbox: Worm and Worm Wheel.
Main Fabricated Gear Box (RA-40)³³.

B. Gears and Shafts

Screen Drive Gears:
- $44 \text{T}$ Screen Drive Gear (RA-45).
- $53 \text{T}$ Spear Gear for screen drive.
Top Shaft: For screen drive gear box (RA-44).
Helical Gear: Having $45 \text{ mm}$ and $30 \text{ mm}$ bore (RA-48B).

C. Couplings and Bearings

These components transmit power and ensure smooth rotation:

Couplings:
- Quick Change Coupling (Entry) (RA-06).
- Muff Coupling (RA-47).
- Joint Coupling for screen drive gear box.
Bearings:
- Ecceentric Type: $6205, 6206$ bearing (RA-50).
- Kydon Bearing: For all repeats.

III. Bridge and Head Assemblies

These assemblies house the screens and squeegee systems, crucial for repeat precision:

Head Assemblies (Drive Side): Available for $640$, $820$, $914$, and $1018$ repeats.
Universal Bridge Assemblies (for all repeats):
- Drive Side (RA-25).
- Pump Side (RA-26).
Bridge Assemblies (for $64 \text{ repeats}$):
- Drive Side (RA-28).
- Pump Side (RA-27).
Suspension: Drive side and pump side.
Bearing and Bush Assemblies:
- Pump Side Console.
- Pump Side Bearing Bush Assembly.
- Drive Side Head Bush Assembly.
- Bearing Block with Cover.

IV. Fabric and Blanket Handling

Proper fabric and blanket management is essential to prevent defects:

Doctor Blade Assembly: Used for thermoplast/blanket washing (RA-59)⁵³.
Squeegee Blade: Precision blades available in dimensions like $45^{\circ} \times 0.15$ and $50 \times 0.15.
Rubber Squeegee: For gumming and pre-washing (RA-55).
Squeegee Pipe: Available in blade type or magnet type, and in widths of $1280 \text{ mm}$, $1620 \text{ mm}$, and $1850 \text{ mm}$⁵⁶.
Rubber Tube: For squeegee pipe
Main Roller: Entry/Exit (RA-41).
Rollers: Available in MS/rubber/ebonite coated/Teflon coated (RA-53).
Wiper Rubber (RA-54A)⁶⁰.
Brush Roller (RA-51) & Brush Segment (B-51): Used for cleaning/processing.
Aluminum Patla: Available as ‘A’ (pump side) and ‘B’ (drive side).
Cloth Guider:

V. Pneumatic and Control Components

Cylinders, switches, and setting tools provide the control and movement for various functions:

Air Cylinders:
- Pressure Roller Air Cylinder with Bracket (RA-57).
- Air Cylinder for Head Lifting (RA-64).
- Lifting Cylinder for electric magnet beam and roller.
- Air Cylinder for infeed and plater.
Rotary Filler Switch (RA-63).
Setting Tools:
- Micro Setting Assembly (RA-58).
- Knob Printing Head (RA-42).
- Hand Wheel (RA-43)

R.A. Industries also offers repairing and planning services for magnet beams⁷², ensuring your existing equipment can be maintained to the highest standards.

R.A. Industries is committed to providing the essential components that keep the complex world of textile printing running smoothly and efficiently.

R. A. Industries

Rotary Screen Printing & Textile Machinery Parts