SME220 Automatic Squeegee Cleaning Machine for Consistent Prints

Dried solder paste on a squeegee blade is the quiet source of print defects that show up as bridging, missing paste or smearing on the next panel. On most lines the blade gets a quick manual wipe between runs — inconsistent, slow, and dependent on whoever is free at changeover. The SME220 automatic squeegee cleaning machine removes that variable by cleaning, rinsing and drying scrapers in one button cycle, so every print starts from a clean blade.

The cost you haven't named: manual squeegee cleaning

• Print defects trace back to the blade. Paste that cakes in the squeegee gap transfers as uneven deposits on the next stencil pass, and the defect is only visible after placement or SPI — by which point a panel of good components carries a hidden flaw.
• Inconsistent changeover. Manual wiping quality depends on the operator and the time available, so blade cleanliness varies board by board and shift by shift rather than by a set standard.
• Hidden labor draw. Cleaning 6 to 12 scrapers by hand between print runs pulls an operator away from the line every changeover, and that time scales with how many printer lanes you run.
• Solvent and water waste. Open manual cleaning uses more chemistry than a closed, filtered cycle and offers no recovery, so consumable cost and disposal both climb with volume.
• Stencil life suffers too. A paste-fouled blade scores the stencil edge on the next pass, so poor blade hygiene quietly shortens stencil life and worsens print definition across the whole job.

The Four-Point Squeegee Hygiene Audit

Frame the purchase as an audit rather than a single buy, so the decision survives the next product change. Call it the Four-Point Squeegee Hygiene Audit.

1. Map print-defect sources. List the defects that appear after a changeover — bridging, smearing, missing paste — and trace how many start at the squeegee gap rather than the stencil or the printer program. The aim is to separate blade-driven defects from process-driven ones before you spend on equipment.

2. Score manual clean labor. Tally how many scrapers you clean per shift, how long each takes by hand, and the SPI failures attributed to blade residue. High-frequency lines with several printer lanes show the payback first, because the labor and defect tax repeats on every lane.

3. Verify paste removal. Confirm the machine reaches dried paste in the blade gap and on the edges, not just the flat face, using ultrasonic plus spray rather than a wipe. A blade that looks clean on the face can still carry paste in the kerf.

4. Lock cycle consistency. Define one clean-rinse-dry program per blade type so every changeover runs the same verified cycle, logged and repeatable. Consistency, not peak speed, is what protects first-pass yield.

The vehicle: SME220 Automatic Squeegee Cleaning Machine

The SME220 replaces manual scraping with a closed, repeatable cleaning cell built around a SUS304 body and Mitsubishi control. Southern Machinery positions it for budget-to-midrange EMS line upgrades where print stability matters but floor space and capital are tight.

• Map print-defect sources → thorough residue removal. Ultrasonic vibration combined with internal and external spray loosens dried solder paste from scraper surfaces and gaps that a wipe leaves behind, while the SUS304 piping and angle seat valves keep the fluid path clean and serviceable between cycles.
• Score manual clean labor → batch capacity. A single cycle handles 6 × 600 mm or 12 × 10-inch scrapers, replacing the hand cleaning of a full changeover set at once through a clean/rinse diaphragm pump path sized for the blade load.
• Verify paste removal → fixture clamping. Scrapers are held in a fixture clamp for fast, safe loading, so the blade sits correctly in the jet path every time and the operator never handles a paste-laden edge during changeover.
• Lock cycle consistency → one-button operation. A settable program runs clean, rinse and dry automatically through a Mitsubishi PLC and touch screen, with a 2 kW hot-air blower for drying and double filtration that recycles the cleaning liquid between cycles.

Specification note: solution compatibility, cycle time per blade type and liquid consumption should be confirmed at quotation, because they depend on your paste chemistry, scraper length and changeover frequency.

Specifications

| Parameter | Value |

| --- | --- |

| Body material | SUS304 stainless steel |

| Cleaning method | Ultrasonic vibration + internal/external spray |

| Scraper capacity | 6 × 600 mm or 12 × 10-inch |

| Drying | 2 kW hot-air blower |

| Control | Mitsubishi PLC + touch screen |

| Filtration | Double filtration, recycled liquid |

| Pumps | Clean/rinse + diaphragm pump |

| Piping | SUS304 pipes, angle seat valves |

| Operation | One-button clean → rinse → dry |

The loop: review cleaning yield every month

Print quality drifts as paste formulations and stencil lifetimes change. Build a loop: each month, review SPI defect rates attributed to the squeegee, check the SME220 filtration and recycled-liquid condition, and confirm the clean-rinse-dry program still matches your current paste. If a new printer or blade length enters the line, re-run the Four-Point Squeegee Hygiene Audit and adjust the cycle before volume builds. Pair the SME220 with a stencil cleaner such as the S1688 or SME800 so the whole print cell — stencil and blade — stays in spec. The loop is what keeps blade hygiene from silently degrading between audits.

Your next step

Send us your squeegee lengths, printer model and changeover frequency. We will return a cleaning review outlining where the SME220 fits, what capacity to specify, and what to confirm at quotation — including pairing with stencil cleaners such as the S1688 and SME800, and how the closed double-filtration loop affects your liquid consumption. Reach Jason at jasonwu@smthelp.com or on WhatsApp +86 13602562576.

FAQ

Which squeegees can the SME220 clean?

It cleans scrapers from most automatic solder paste printers — up to 6 × 600 mm or 12 × 10-inch per cycle.

How does the cleaning work?

Ultrasonic vibration plus internal and external spray removes solder paste from blade surfaces and gaps, then a 2 kW hot-air blower dries the scrapers.

Is the process automated?

Yes — one-button operation runs the clean, rinse and dry cycles through a settable program on a Mitsubishi PLC with touch screen.

What control system does it use?

A Mitsubishi PLC with a color touch screen; temperature, cleaning, rinsing and drying are all adjustable per blade type.

How does the SME220 pair with stencil cleaning?

It complements stencil cleaners such as the S1688 and SME800 so both the stencil and the squeegee are cleaned in closed, repeatable cycles within the same print cell.

Jason Wu

Founder & CEO, Southern Machinery (Shenzhen Southern Machinery Sales and Service Co., Ltd.)

Email: jasonwu@smthelp.com / info@smthelp.com

WhatsApp: +86 13602562576

Catalog & manuals: file.autoinsertion.com | Machine photos: ph.smthelp.com

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