C519 4kW CNC Automatic Foam Boring Machine 2300mm Boring Length 50-80mm Hole for PU Sponge Peeling Line

Automatic Feeding Foam Boring Machine for Cylindrical Foam and Cubic PU Sponge with 2300mm Boring Length

Product Introduction

The C519 CNC automatic foam boring machine drills the centre hole in cylindrical foam and cubic PU sponge before peeling. It bores holes from 50mm to 80mm in diameter over a boring length of up to 2300mm, using a 4kW motor and an automatic feeding system. Matched to a foam peeling machine, it removes the manual drilling step that normally bottlenecks a sponge production line, and it keeps the hole straight so the block mounts correctly for slicing.

Foam boring is a pre-processing step, not a finishing step. Before a cylindrical foam block can be peeled into thin sheets, it needs a straight hole through its axis so that the peeling machine can hold and rotate it. Drilling that hole by hand is slow, physically demanding and inconsistent: the drill wanders, the hole is off-centre, and the block has to be reworked or scrapped.

The C519 automates that step. The block is loaded onto the machine, the boring head advances along the axis, and a hole between 50mm and 80mm in diameter is cut through a length of up to 2300mm. Automatic feeding moves the work through the boring cycle without the operator pushing the block by hand, which is what makes the process repeatable across a shift.

The machine handles two workpieces: cylindrical foam and cubic PU sponge. That matters because most sponge factories run both. Round blocks come from moulded foam, while cubic blocks are cut from large slabs. A boring machine that only accepts one shape forces the plant to keep a separate manual station for the other, which is exactly the inefficiency the C519 is designed to remove.

Peeling machines slice foam by rotating the block against a blade, or by advancing a blade around the block. Either way, the block must be centred and held along its axis. The centre hole is what makes that possible: it locates the block, carries the mandrel or support, and keeps the rotation true.

Hole quality therefore decides sheet quality. If the hole is off-centre, the block rotates eccentrically, and the peeled sheet comes out with a thickness variation that cannot be corrected downstream. If the hole is not straight, the block binds on the mandrel and the operator has to stop the line. If the hole is undersized, the block will not seat; if it is oversized, the block slips and the surface tears.

The C519 addresses all three with a stable mechanical frame, a guided boring head and automatic feeding that keeps the block aligned through the stroke. The result is a hole that is centred, straight and within the 50–80mm range the peeling machine expects.

On a manual boring station, the operator feeds the block, watches the drill, stops at depth, retracts and unloads. That cycle is short but constant, and it ties one person to the machine for the whole shift. The C519 replaces it with an automatic feeding structure.

The typical sequence is:

1. Load the block onto the feeding table, either cylindrical or cubic.
2. Align the block to the boring axis and clamp or seat it.
3. Start the cycle: the boring head advances through the block while the feeding system carries the work.
4. At the end of the stroke, the head retracts and the block is released.
5. Transfer the bored block to the peeling machine for slicing.

Because the feeding motion is mechanical, the hole depth and the feed rate do not depend on how tired the operator is at the end of the shift. That consistency is what allows the boring station to be matched to the peeling machine's rhythm instead of running in bursts.

The C519 is built as a long-bed machine, sized around the 2300mm boring length.

Bed and frame. The overall dimension is 6000×1600×2500mm, with a machine weight of 1500kg. The length comes from the boring stroke plus the feeding and loading sections; the frame is designed to stay rigid over that span so that the hole does not drift at the far end of the stroke.

Boring head and drive. A 4kW motor drives the boring head. The head is guided along the axis of the machine so that the hole stays concentric with the block.

Automatic feeding system. The feeding structure carries the block through the cycle. It is the component that turns a manual drilling job into a repeatable production step, and it is the main reason the machine can be integrated into a sponge line rather than used as a standalone tool.

Controls and guarding. The control station groups the feed, boring and return functions. Guards cover the rotating and moving parts, and the emergency stop is positioned at the operator station.

The C519 is designed for PU sponge in two forms: cylindrical foam and cubic foam blocks. Both are soft, compressible and abrasive in different ways, and both need a clean hole rather than a torn one.

• Cylindrical foam: the block already has a round section, so the boring axis is the geometric centre. The hole is used to mount the block on the peeling machine.
• Cubic PU sponge: the block is square or rectangular. The hole is bored through the intended axis before the block goes to peeling, which is the common requirement in mattress and cushion production.
• Density range: soft foams cut easily but tear if the feed is too fast; denser foams need a steady feed and a sharp boring head. The automatic feed helps in both cases by keeping the advance constant.

Foam with hard inclusions — metal, wood, cured foam lumps — should be inspected before boring. A hard inclusion will deflect the boring head, and a deflected head produces an off-centre hole that no amount of downstream adjustment can fix.

• Wide material adaptability: suitable for both cylindrical foam and cubic PU sponge, covering different boring demands in one machine.
• Automatic feeding design: the automatic feeding structure reduces manual operation and improves production speed.
• Stable processing performance: a reliable mechanical frame ensures consistent hole straightness.
• Perfect matching: special supporting equipment for the foam peeling machine, connected directly into the sponge production line.
• Useful boring range: 50–80mm hole diameter with a boring length up to 2300mm.
• Global support: remote technical assistance, spare parts supply and installation guidance.

Boring length refers to the maximum length of hole the machine can produce in one cycle. Confirm your block length and required hole diameter before ordering.

A boring machine is judged by the hole it leaves, not by the speed it runs. Four things determine hole quality on the C519:

• Alignment at loading. The block must be seated against the reference surface. A block loaded at an angle produces a hole that exits off-centre at the far end.
• Boring head condition. A dull or damaged head tears the foam instead of cutting it, and torn foam collapses inward, giving an undersized hole.
• Feed consistency. The automatic feed keeps the advance steady; operators should not override it to gain speed, because fast feed on soft foam produces a wandering hole.
• Block support. Long blocks need support along their length so that the block does not sag and pinch the boring head.

A simple check after each setup is to insert a test mandrel or gauge through the hole. If it passes freely from both ends, the hole is straight and within size; if it binds, the block alignment or the head needs attention.

• PU sponge factory: raw foam block middle hole drilling before peeling.
• Foam peeling production line: supporting pre-processing equipment for sponge slicing.
• Mattress and cushion industry: sponge hole processing for mattress and cushion raw blocks.
• Foam converting plants: preparing round blocks for sheet production.
• Recycling and rebond lines: boring blocks that will be mounted for further processing.

The C519 is a linking machine. It sits between foam block production and peeling, and it exists because those two stages need different things: the foaming stage produces a solid block, while the peeling stage needs a block with a centre hole.

Upstream: blocks arrive from moulding or from a block-cutting machine. Cylindrical blocks come directly from round moulds; cubic blocks are cut from large slabs. Both need inspection before boring.

The C519: the block is bored to the required diameter and depth. The machine's 2300mm boring length sets the practical limit on block length.

Downstream: the bored block goes to the foam peeling machine, where it is mounted and sliced into continuous sheets. Those sheets are then laminated, cut to size or packed.

Because the boring step feeds the peeling machine, the two should be sized together. A boring machine that is faster than the peeling machine simply builds a queue; one that is slower starves it. In most plants the C519 runs as a batch pre-processing station ahead of a peeling line that runs continuously.

Planning around the C519 is a matter of matching three numbers: block length, hole size and the demand of the peeling machine.

• Block length: the boring length is 2300mm. Longer blocks cannot be bored in one pass and must be planned around that limit.
• Hole diameter: holes from 50mm to 80mm are within the machine's range. The diameter should be chosen to match the mandrel of the peeling machine, not the other way round.
• Batch size: boring is normally done in batches before a peeling run. Plan the batch to cover the peeling shift plus a small buffer, so that a dull boring head or a blocked feed does not stop the peeling line.

Because the feeding is automatic, one operator can load and unload while the machine runs the cycle, and can attend to inspection at the same time. That is the practical labour saving: not a faster hole, but a hole that no longer needs a dedicated operator standing over it.

• Straightness: a hand-held drill follows the path of least resistance in soft foam and wanders; a guided boring head on a rigid bed holds the axis over the full 2300mm.
• Consistency: manual feed varies with operator fatigue; automatic feeding produces the same hole at the start and end of a shift.
• Labour: manual boring ties one person to the machine for every block; the C519 needs only loading and unloading attention.
• Integration: a general drill rig is a workshop tool, while the C519 is built as supporting equipment for a peeling line, with the bed length and feeding system that the line requires.
• Safety: a purpose-built machine keeps the operator outside the boring zone, which a hand-held drill cannot do.

For a plant that bores a handful of blocks a week, the difference is convenience. For a plant that bores every day to feed a peeling line, it is the difference between a predictable schedule and a constant bottleneck.

The C519 is a long machine, so layout planning comes first.

• Floor space: the machine measures 6000×1600×2500mm. Allow additional space at both ends for loading and unloading, and enough clearance for the boring head to retract fully.
• Floor: a level, load-bearing concrete floor capable of supporting the 1500kg machine and the blocks being handled.
• Power: a supply sized for the 4kW motor with correct protection. Confirm local voltage and frequency before the order is fixed.
• Layout: place the machine so that blocks move in a straight line from storage to boring to peeling, without a turn that forces manual lifting.
• Environment: keep the area dry, with airflow to clear foam dust, and keep the floor free of offcuts that could jam the feeding system.

Commissioning includes a dry run, alignment checks, a trial bore on the customer's own foam, a mandrel check and operator training.

• Before starting: check that the block is seated correctly, the guards are in place and the boring head is sharp.
• During boring: never reach into the boring zone or adjust the block while the head is moving. Use the stop control before any intervention.
• After boring: remove the block only after the head has fully retracted and the feed has stopped.
• Lockout: isolate power before changing the boring head, clearing a jam or servicing the feed system.
• PPE: eye protection and gloves when handling blocks and inspecting the boring head.

Operators should understand that foam is deceptive: it looks soft, but a rotating boring head will pull a loose sleeve or glove. Training on the stop procedure is part of commissioning.

• Daily: clean foam dust from the bed, the feed rails and the boring zone; check that the head is free of melted or compacted foam.
• Weekly: inspect the boring head for wear or damage, check fasteners on the guide system and confirm that the feed motion is smooth.
• Monthly: check the drive motor current against the commissioning record, inspect belts and couplings, and test guards and the emergency stop.
• Spare parts: keep boring heads, guide wear parts, belts and fasteners in stock. A spare head means a damaged edge does not stop the line.

Boring heads are consumables. The service life depends on foam density and on how much contamination is in the material, so the replacement interval should be set from the plant's own experience rather than a fixed calendar.

Each machine is assembled and run before shipment, covering the boring head drive, the automatic feed, the stroke limits and the safety guards. The machine is CE certified.

At 6000mm long and 1500kg, the C519 needs a shipping plan agreed before dispatch: lifting points, container arrangement and protection of the long bed during transport. The machine is cleaned, protected against corrosion and packed for container shipment. Delivery time is 45 working days after downpayment, with the final schedule confirmed when the order is placed.

1. Block type and length. Confirm whether you bore cylindrical foam, cubic PU sponge or both, and confirm the maximum block length against the 2300mm boring length.
2. Hole diameter. Choose the diameter from the mandrel of your peeling machine, within the 50–80mm range.
3. Line fit. Tell us the peeling machine's output so that the boring station can be planned as a batch step ahead of it.
4. Layout and power. Share the available floor length and power supply; the machine needs 6000mm of length plus loading clearance.

Send these four details and we will confirm the configuration, the layout plan and the delivery schedule.