Automatic Bag Cutting Machine

Product Details & Technical Q&A — Rentech Machine Private Limited

The Rentech Automatic Bag Cutting Machine is an industrial fabric-cutting system designed for continuous and repeatable cutting of PP woven, HDPE, Leno, BOPP laminated and other compatible woven fabrics into predetermined bag lengths.

The machine combines controlled fabric feeding, length measurement, automatic cutting and production counting to provide consistent cut lengths with reduced manual intervention.

Product Details

Key Features

• Automatic fabric feeding
• Programmable cutting length
• Continuous cutting operation
• Encoder/servo-based length measurement options
• High-accuracy cutting
• Hot or cold cutting configuration
• PLC-based control
• HMI touchscreen operation
• Digital production counter
• Adjustable machine speed
• Fabric tension control
• Photoelectric/proximity sensing
• Automatic cutting cycle
• Emergency-stop and electrical protection
• Suitable for different woven-fabric applications

Technical Q&A

Q1. What is an Automatic Bag Cutting Machine?

An Automatic Bag Cutting Machine automatically feeds woven fabric and cuts it into predetermined lengths.

The basic process is:

Fabric Roll → Feeding → Length Measurement → Positioning → Cutting → Cut Piece Discharge

This eliminates the need for manual measurement and individual cutting.

Q2. What materials can the machine cut?

Depending on the machine configuration, it can process:

• PP woven fabric
• HDPE woven fabric
• Leno woven fabric
• BOPP laminated woven fabric
• Laminated PP fabric
• Unlaminated woven fabric
• Other compatible flexible woven substrates

Material suitability depends on GSM, thickness, lamination, weave construction and cutting method.

Q3. How is the cutting length controlled?

The cutting length can be controlled using an encoder-based or servo-controlled feeding system.

The controller monitors fabric movement and initiates the cutting cycle when the programmed length has been reached.

For example:

Required length = 1000 mm

The feeding system moves approximately 1000 mm of fabric, positions the material and activates the cutting mechanism.

Q4. What is the function of the encoder?

The encoder provides feedback corresponding to the movement of the feeding roller or web.

The PLC uses this feedback to calculate the actual fabric travel distance.

This enables electronic control of:

• Cutting length
• Feeding distance
• Positioning
• Production counting
• Machine synchronization

Q5. Can the machine use a servo motor?

Yes. A servo-controlled feeding system can be used where higher positioning accuracy and programmable motion control are required.

Servo control provides:

• Closed-loop positioning
• Programmable feed length
• Controlled acceleration/deceleration
• Repeatable positioning
• Electronic synchronization

The servo motor and drive capacity must be selected according to fabric tension, roller diameter, machine speed and mechanical load.