Vacuum Suction PU Foam Cutting Machine with 10000 mm Band Knife for Continuous Slicing

The TDP-70 is a carousel horizontal cutter that slices several PU foam blocks in one continuous pass. The rotary table runs on frequency-converter drive at 0–3.5 r/min, the cutting thickness is set on a PLC touch screen from 2 to 150 mm, and a 10000 mm band knife cuts without retracting between blocks. A vacuum suction system holds the foam down so each slice keeps the same thickness. Cutting size is 2000*3000 mm, cutting height is 1250 mm, motor power is 22 kW, machine weight is 4000 kg, and the overall size is 8000*7000*2400 mm.

The design target is throughput on repeat work. A plant that slices the same foam grade into the same thickness all day does not want the blade to leave the block after every sheet. The TDP-70 keeps the knife in the cut and the table turning, which is where the cycle-time gain comes from.

• Model: TDP-70
• Cutting size: 2000*3000 mm
• Cutting height: 1250 mm
• Cutting thickness: 2–150 mm
• Worktable rotation speed: 0–3.5 r/min
• Band knife length: 10000 mm
• Motor power: 22 kW
• Machine weight: 4000 kg
• Overall dimension: 8000*7000*2400 mm
• Certification: CE

• Batch slicing in one pass: multiple PU blocks are cut in the same cycle, and the knife does not retract between them.
• Uniform slice thickness: vacuum suction keeps the block seated, so the sheet does not lift as the blade releases stress.
• Simple thickness change: the PLC touch screen sets 2–150 mm without a mechanical gauge change.
• Long band knife: a 10000 mm knife gives a smooth cut surface and spreads wear over a longer edge.
• Stable rotary drive: frequency-converter control keeps the table speed steady through the pass.
• 1250 mm cutting height: handles tall blocks that would need two setups on a lower machine.
• Low operator load: once the batch is loaded and the thickness is set, the cycle repeats without a manual knife return.

• Furniture: PU foam sheet for sofa cushions and mattress padding.
• Mattress production: comfort layers and support sheets in repeat thicknesses.
• Footwear: sliced sponge for insoles and lining.
• Packaging: flexible foam buffer sheets and inserts.
• Composite material: thin foam slices for lamination and bonding.
• General conversion: foam sheet stock cut to a fixed thickness for resale.

1. Load the table. Place the PU blocks inside the 2000*3000 mm cutting area, square to the knife line.
2. Apply vacuum. The suction system pulls the blocks down and holds them for the pass.
3. Set the thickness. Enter 2–150 mm on the PLC touch screen.
4. Start the rotation. The table turns at the set speed and the band knife enters the block.
5. Cut through the batch. The knife stays in the cut as the table carries each block past it.
6. Remove the sheets. Sliced sheets are taken off and the next batch is loaded.

Because the knife does not retract, the non-cutting time between blocks is short. That is the difference between a machine that cuts a block and a machine that runs a slicing shift.

Foam is elastic. As a band knife passes, the material ahead of the edge compresses and the material behind it springs back. If the block is not held, the sheet lifts slightly and the next slice starts from a different height. Vacuum suction removes that movement by pulling the block onto the table surface for the full pass.

Three things keep the vacuum effective:

• A clean table surface: foam dust blocks the suction holes and creates low-vacuum patches.
• A sealed block face: a square, clean face sits down better than a torn or sloped one.
• A serviced filter: a loaded filter reduces airflow before the gauge shows a problem.

Check the first slice of each batch. If the front edge is thicker than the rear edge, the block is lifting and the vacuum needs attention.

A 10000 mm band knife gives a longer cutting edge between sharpenings and a straighter line through a tall block. The length also lets the knife run at a lower stress per unit of edge, which helps hold a smooth cut face in flexible foam.

Knife care is simple but not optional. Check the edge each shift, keep the guide clear of foam dust, and follow the sharpening interval for the foam grade. A dull band knife compresses the foam before it cuts, and the slice comes out with a rounded edge.

The cutting area is 2000*3000 mm and the maximum cutting height is 1250 mm. A 1250 mm block sliced at 50 mm yields 25 sheets; the same block at 20 mm yields about 62 sheets before kerf; at 2 mm the count runs into the hundreds. Plan the batch by thickness so the knife stays in one setting for as long as possible.

Keep the load inside the cutting area and balanced on the table. A block that overhangs the edge can shift when the knife enters, and the vacuum will not recover the position during the pass.

Many faults show up on the first sheet of a batch. Inspect that sheet before running the rest of the block, and the correction costs one slice instead of a shift.

A slicing batch is consistent when the foam, the thickness setting and the knife condition stay the same. Changing foam grade in the middle of a batch changes the compression under the knife, and the thickness setting that worked for one grade may not suit the next.

Keep one log per batch: foam grade and density, block count, thickness setting, table speed, knife hours and the thickness check result. When a customer reports a thin sheet, the log shows if the cause was the block, the setting or the knife.

Handle 1250 mm blocks with a lift or a crane, not by tipping them onto the table. A block that is dropped can lose its square face, and the first slices will run wavy until it is trimmed.

Workshop conditions also affect the cut. Flexible foam stiffens in a cold room and softens in a warm one, so a thickness setting made in the morning may behave differently after the hall warms up. Keep the cutting area at a stable temperature and note any change in the batch log.

Output is set by the number of passes and the handling between them. Continuous cutting removes the knife return, so the operator's time goes to loading and unloading. Keep a stack of blocks beside the table and a clear route for finished sheets.

• Group by thickness: one PLC setting for a full batch reduces changeover.
• Stage blocks at table height: lifting a 1250 mm block costs more time than the cut itself.
• Plan blade checks at breaks: a sharpening break in the middle of a batch shows up as a thickness step.

Check thickness with a gauge at the front edge, the middle and the rear edge of the sheet. A difference across the sheet points to vacuum loss or a block that is not square. A difference between sheets points to table speed or knife condition.

Also check the cut face. A smooth face with closed cells is normal for a sharp knife; a torn face with pulled granules means the knife is dull or the feed is too fast for the foam grade.

The machine occupies 8000*7000*2400 mm and weighs 4000 kg. It needs a level floor, clear space around the table for block handling, and a power supply for the 22 kW motor. Leave access to the band knife guides for sharpening and replacement.

Install the frame and level it, mount the rotary table, fit the band knife and guides, connect the vacuum system and power, then run an empty rotation and a trial block. Commissioning ends with a thickness check at 2 mm, 20 mm and 100 mm.

• Keep hands and tools clear of the band knife and the table edge while the table is turning.
• Halt the rotation before reaching into the cutting area.
• Confirm the vacuum is holding before starting a batch.
• Wear cut-resistant gloves when handling sheets and changing the band knife.
• Lock out power before opening a knife guard or clearing a jam.

Record the batch thickness, block count, sheet count and any thickness deviation. That log shows when a knife change or a vacuum service is due, instead of waiting for a rejected order.

The machine ships with the table, band knife station and frame braced separately. Packaging is confirmed per order because the method depends on the destination port and unloading equipment. Delivery time is 45 working days after downpayment, payment is by L/C or T/T, and price is quoted on inquiry. A spare band knife can be shipped with the machine on request, so the first blade change does not wait for a parts order.