SME-750II Dual-Stencil Pneumatic Cleaning Machine: 2x Stencil Cleaning Throughput by Southern Machinery

Stencil cleaning is easy to overlook and expensive to get wrong. Blocked apertures cause paste misprint and rework, hand cleaning varies from shift to shift, and solvent waste quietly eats the consumables budget. The SME-750II Dual-Stencil Pneumatic Cleaning Machine from Southern Machinery changes that math: two independent cleaning units wash, filter, recycle and air-dry two stencils in one cycle, with no electric power at all.

What is this machine used for?

The SME-750II is a full-pneumatic stencil cleaning machine for SMT lines that clean solder paste stencils, red glue stencils and copper masks. It removes flux and paste residue with solvent or cleaning liquid, then blow-dries each stencil so it can go straight back to the printer.

Its defining capability is capacity. Two independent cleaning units mean the machine holds up to two stencils (L750 x W750 x H40 mm each, reference) at the same time, and it can even clean different stencil types in one cycle. Because the machine is driven entirely by compressed air — no electric power — there is no electric ignition source near flammable cleaning solvents.

The hidden cost of manual stencil cleaning

Before looking at the machine, it helps to price what manual stencil care actually costs a line:

• Wasted cleaning liquid — manual cleaning and poor filtration waste solvent and cleaning liquid.
• Chemical exposure — hand contact with solvent puts operators at risk.
• Blocked apertures — residue left in stencil apertures causes paste misprint and rework.
• Inconsistent results — manual quality depends on the operator, the batch and the shift.
• Slow one-by-one cleaning — cleaning stencils one at a time bottlenecks changeover.
• Fire and detonation risk — electric cleaning equipment near flammable solvents carries ignition risk.
• Uncontrolled discharge — contaminated solvent released without treatment damages the environment.

A dual-stencil pneumatic cleaner removes most of these risks at once: the operator loads the stencils, presses start, and the machine does the washing, filtration and drying.

How the SME-750II cleans two stencils

The working cycle is automatic after loading:

1. Load two stencils — place up to two stencils (750 x 750 x 40 mm reference) into the two independent units and close the inner-lock safety door.
2. 360 degree spray wash — upper and lower rotary rods spray solvent onto both sides of each stencil, keeping stencil tension stable.
3. Filter and recycle — 3-level filtration (1 mm net, 20 um bag, 1 um cotton per unit) recycles the liquid with low consumption.
4. Air blow dry — compressed air blow-dries both stencils; open the door and they are ready for the line.

Feature, advantage, benefit: what the SME-750II changes on your floor

| Feature | Advantage | Benefit |

| --- | --- | --- |

| Two independent cleaning units | Clean two stencils, even different types, in one cycle | Double throughput without doubling the machine or the floor space |

| Full pneumatic drive, no electric power | No electric ignition source near solvents | Safer cleaning with flammable liquids; usable where power is limited |

| 360 degree double-side rotary nozzles | Both sides washed and blow-dried evenly | Stable aperture cleanliness, fewer paste misprints |

| 3-level filtration per unit | Liquid filtered and recycled each cycle | Lower solvent consumption and cleaner results |

| SUS304 structure and liquid pipes | Acid/alkali corrosion resistance | Long service life (15-year reference) with no plastic pipes |

| Inner-lock safety door and safety valve | Machine stops immediately if the door is opened | Operator protection during the cycle |

| Standard solvent auto add and discharge | Liquid condition stays consistent automatically | Less manual handling and dosing errors |

| Modular design | Easy access for maintenance | Lower downtime and simpler service |

Typical application scenarios

The SME-750II fits high-stencil-volume environments where changeover speed decides line efficiency:

• High-mix EMS lines with frequent product changeovers and multiple stencil changes per shift.
• Factories cleaning red glue or copper mask stencils alongside standard solder paste stencils, including mixed cycles.
• Lines using flammable solvents where a fully pneumatic design (no electric power) removes an ignition source.
• Plants with limited power availability at the cleaning station, since the machine only needs compressed air.
• Quality-driven automotive, medical and industrial electronics lines where print defects are expensive to rework.

How it fits into a complete PCB assembly line

The SME-750II is an offline stencil cleaning station that works with any SMT printer — paste printer, screen printer or dedicated stencil stations. In a typical SMT flow (stencil printing, pick-and-place, reflow, inspection), stencil cleanliness directly protects the first process: a clean, tension-stable stencil prints consistently, so downstream placement and reflow see fewer misprint-related stops.

Southern Machinery builds the complete line around it: SMT and THT machines, wave soldering, board handling and inspection equipment can all be configured as one integrated solution, with the stencil cleaner as the supporting station that keeps changeovers fast.

Key selection parameters: what to prepare before you ask for a quote

Send these details with your inquiry so the right machine and cycle can be confirmed:

• Stencil details — stencil size (up to 750 x 750 x 40 mm reference), solder paste / red glue / copper mask type.
• Cleaning liquid — solvent or cleaning liquid, foam characteristics, and volume used per day.
• Throughput — stencils per day and cleaning intervals.
• Facility conditions — air supply (0.5–0.7 MPa, 400–600 L/min x 2 sets), exhaust connection, and floor space (machine size L1500 x W960 x H1700 mm reference).

ROI, quality and capacity value

For an EMS line cleaning stencils by hand today, the SME-750II's value shows up in three places:

• Capacity — 2x throughput, because two stencils are cleaned per cycle in independent units.
• Consumables — approximately 60% less solvent consumed with 3-level filtration and recycling (reference estimate).
• Labor — one operator per shift freed from manual stencil scrubbing (reference estimate).

The source brochure's typical payback estimate for a dual-stencil cleaner on a mid-size line is under 12 months. These figures are planning estimates based on reference EMS lines; actual payback depends on stencil volume, solvent cost and quality targets. Southern Machinery calculates a line-specific payback with your numbers during the consultation.

On quality, the value is repeatability: every cycle follows the same wash, filtration and dry sequence, so results no longer depend on who is scrubbing and how tired they are at the end of the shift.

Specifications at a glance

| Parameter | SME-750II reference value |

| --- | --- |

| Stencil size | L750 x W750 x H40 mm x 2 pcs maximum |

| Cleaning units | 2 independent units (two stencils, or different types, at once) |

| Liquid tank capacity | 40 L x 2 pcs |

| Wash method | 360 degree double-side rotary nozzles, liquid spray wash |

| Dry method | 360 degree double-side rotary nozzles, liquid then air blow dry |

| Clean / dry time | 3–5 min clean, 3–5 min dry (solder paste stencil, reference) |

| Filter system | 1 mm SUS304 net, 20 um bag, 1 um cotton filter per unit |

| Air supply | 0.5–0.7 MPa, 400–600 L/min x 2 sets |

| Net weight | 480 kg |

| Machine size | L1500 x W960 x H1700 mm |

| Structure | SUS304, acid/alkali corrosion resistant, 15-year lifespan reference; SUS304 liquid pipes |

| Drive | Full pneumatic — no electric power |

| Operation | One-button; clean and dry automatic; standard solvent auto add and discharge |

Specifications are reference values from the SME-750II brochure and remain subject to final technical confirmation against your stencils and cleaning liquid.

FAQ

What does the SME-750II clean?

It cleans solder paste stencils, red glue stencils and copper masks, removing residue with solvent or cleaning liquid — and it cleans two stencils at once.

Why two independent units?

Each unit has its own 40 L tank and 360 degree rotary rods, so two stencils (even different types) are cleaned in one cycle, doubling throughput without doubling the machine.

Why full pneumatic?

The machine is driven entirely by compressed air with no electric power, so there is no electric ignition source near flammable solvents, and it can run where power is limited at the cleaning station.

How does the filtration work?

Each unit uses 3-level filtration — a 1 mm SUS304 net, a 20 um filter bag and a 1 um cotton filter — keeping the liquid clean and recycling it for low consumption.

How long does a cycle take?

Reference clean time is 3–5 minutes and dry time is 3–5 minutes for a solder paste stencil, with one-button automatic operation.

How do I get a price and delivery time?

Email info@smthelp.com or WhatsApp +86 136 0256 2576 with your stencil types, cleaning liquid and volume. Quotation and delivery schedule are provided after technical confirmation — typically the same working day.

Next step: get a line-specific stencil cleaning proposal

Tell Southern Machinery your stencil types, cleaning liquid, volume and quality target. You get a machine recommendation, quotation and delivery schedule — and a technical consultation that confirms the model and cycle within 24 hours.

Southern Machinery was founded in 2011 in Shenzhen, China and serves 237+ customers worldwide with SMT/THT PCB assembly automation equipment. Beyond the SME-750II, the company provides complete line solutions covering SMT, THT, wave soldering, board handling and inspection — with high-efficiency, cost-effective machines backed by global service, spare parts support and professional training.

Email for a quote: info@smthelp.com

WhatsApp: +86 136 0256 2576

Website: www.smthelp.com