Full-Auto Knife Paper Pleating Production Line

High quality Full-Auto Knife Paper Pleating Production Line is offered by China manufacturer Pulan. It is a fully automatic pleating production line for paper filter elements used in filters and purifiers, integrating pre-slitting, creasing printer, folding and shaping into one system. The maximum filter paper width is 1050mm, minimum slitting width is 32mm, creasing pitch is adjustable from 10~100mm, fold height is steplessly adjustable from 8~55mm, and folding speed reaches 0~110 folds/min.

What is Full-Auto Knife Paper Pleating Production Line?

Full-Auto Knife Paper Pleating Production Line is an automatic production line that processes filter paper through pre-slitting (width cutting), printer (creasing and marking), and pleating machine (knife folding + heating shaping) in sequence. It consists of three main sections: pre-slitting unit, printer unit, and folding machine unit. It is suitable for mass production of paper filter elements for filters and purifiers. The produced filter elements feature flat ends, accurate dimensions, and adjustable fold height.

Product Features

Three-in-one Integrated Design
Pre-slitting, printer, and folding machine are seamlessly connected, reducing intermediate handling and improving production efficiency.

Wide Width Processing Capability
Maximum filter paper width reaches 1050mm, minimum slitting width is 32mm, and maximum foldable width is 1050mm, suitable for various filter specifications.

Accurate Adjustable Creasing Pitch (10~100mm)
The stepper motor controls the creasing system. The creasing pitch (equal to fold height) can be directly set on the touch screen, including decimal settings such as 8.5mm, making adjustment convenient.

Wide Fold Height Range (8~55mm) Stepless Adjustment
The fold height is set through the touch screen and adjusted accurately with fold height positioning blocks and cylinder positioning sleeves. When fold height exceeds 35mm, roller B needs to be replaced to increase the knife exchange curve.

Cam Transmission for Accurate Dimensions
The folding machine adopts cam transmission structure to ensure precise knife movement and consistent, flat folding ends.

Heating Shaping with Wide Temperature Control Range (Ambient~250℃)
The upper and lower heating plates can be independently controlled. After heat pressing, the filter element maintains stable shape without rebound.

Dot Marking and Counting for Easy Cutting
The machine automatically marks according to the preset fold quantity, eliminating the need for manual measurement during later cutting.

Bilingual Touch Screen with Recipe Storage
Parameters such as fold height, creasing pitch, folding speed, production quantity, and temperature can be set and stored. Automatic shutdown after reaching the preset production quantity is supported.

Technical Parameters

Equipment Application and Structure

Application: Paper filter element pleating processing for filters and purifiers (pre-slitting → creasing → folding → heating shaping → dot marking and counting).
Main Components (Three Sections):
Pre-slitting Unit: Unwinding rack (air expansion shaft + swing arm), imported slitting knives (adjustable spacing), paper feeding rollers (variable frequency speed control), pneumatic triple unit
Printer Unit: Upper creasing knife (adjustable depth), paper feeding rollers (electromagnetic speed control), stepper motor controlled creasing pitch
Folding Machine Unit: Upper and lower folding knives (cam transmission), upper and lower heating plates (ambient temperature~250℃), dot counter, touch screen control system
Auxiliary Systems: Photoelectric switch, frequency converter, speed controller, emergency stop switch, safety guard interlock

Basic Principle and Production Process

Basic Principle: The filter paper is first processed by pre-slitting for width adjustment (optional), then passes through the printer to create folding lines (creasing pitch = fold height). After that, it enters the folding machine, where the upper and lower folding knives work alternately (overlapping height = fold height) to form pleated filter paper. Finally, the heating plates apply heat and pressure for shaping, while the dot marking device creates marks according to the preset folding quantity.
Production Process:
Feeding: The roll filter paper is installed onto the feeding shaft, and the swing arm lifts the material for feeding.
Pre-Slitting: The filter paper passes through tension rollers, support rollers, and feeding rollers. The slitting knife spacing is adjusted according to product width (distance between two knives = required width), cutting the paper into several sections without complete separation if required.
Creasing: The filter paper enters the printer unit. The creasing depth and pitch are adjusted, and the stepper motor parameters are set through the touch screen. The creasing pitch equals the fold height.
Folding: The filter paper enters the folding machine and is folded by the upper and lower knives into pleated shape.
Dot Marking and Counting: The front platform marking device automatically marks according to the preset fold number.
Heating Shaping: The folded filter element passes through adjustable upper and lower heating plates and is shaped under temperature and pressure.
Output: Finished filter elements are discharged from the rear platform.

Installation Notes

Install the Full-Auto Knife Paper Pleating Production Line on a flat, clean and well-ventilated floor, avoiding high temperature and dust environments.
Keep a distance of more than 1 meter from the walls on both sides and more than 1.5 meters at the front and rear.
The distance between the three machines should be 0.8~1.2 meters and kept on the same center line.
Use a forklift above 1 ton for transportation.
Calibrate the level of each machine.
Power supply: 380V/50Hz, with independent grounding.
Air supply pressure: 0.6MPa.
Check cables, emergency stop buttons, and safety guard doors before operation (machine cannot start when the door is open).

FAQ

Q1: How to set decimal fold height such as 8.5mm?
A: Enter the integer part (such as 8) in the "Fold Height Setting" section of the stepper motor parameter interface, and enter the decimal adjustment value in "Fold Height Increase" (such as 3). Calculation: 8 + 3×0.17 = 8.51≈8.5mm.

Q2: Why are the folded filter ends uneven? How to adjust?
A: Usually caused by the upper and lower folding knives not being parallel. If the end surface shifts to the left, lower the left knife gap; if it shifts to the right, lower the right knife gap.

Q3: What adjustments are needed when fold height exceeds 35mm?
A: Replace roller B on the lower cam slide plate (2 pieces on each side, 4 pieces in total) to increase the exchange curve between the two knives, and reduce folding speed appropriately to prevent paper breakage.

Q4: What should I do if pre-slitting paper feeding does not stop or paper jams occur?
A: Check whether the photoelectric switch is blocked or damaged; check the transmission system; meanwhile ensure the gap between guide rail and filter material edge is maintained at 0.2~0.5mm and the guide rail is perpendicular to the paper feeding roller.

Purchasing Information

This Full-Auto Knife Paper Pleating Production Line is a fully automatic pre-slitting-printer-pleating-shaping production line, suitable for high-volume and high-precision folding production of filter and purifier filter elements.
Free sample testing is available (send your filter paper, we will test folding and return samples for inspection).
Bulk orders enjoy discounts, please contact sales for delivery time.
Customized wider paper width, special fold height range, or heating methods are available.
Chinese + English manuals, electrical drawings, and pneumatic parts lists are provided with the machine.