Solder Paste Printer

Product Specifications

Technical details and manufacturing context for Solder Paste Printer

Definition

A solder paste printer is a precision machine used in the assembly of printed circuit boards (PCBs). It is a critical component within an automated PCB assembly line, responsible for accurately applying solder paste to designated pads on the PCB. The process uses a stencil, which is a thin metal sheet with apertures that correspond to the pad locations. The PCB is loaded and aligned under the stencil, and solder paste is applied to the stencil's surface. A squeegee blade then moves across the stencil, forcing the paste through the apertures and onto the PCB pads below. This step is essential for subsequent component placement and reflow soldering, as it ensures that the correct amount of solder is deposited at each pad. The machine's performance is characterized by parameters such as maximum printing area (e.g., 400×300 mm), printing speed (10–50 mm/s), positioning accuracy (±0.02 mm), repeatability (±0.01 mm), squeegee pressure (0–10 kgf), squeegee speed (10–100 mm/s), stencil thickness (0.1–0.3 mm), board thickness (0.5–5 mm), power supply (220 V AC ±10%, single phase, 50/60 Hz), air supply pressure (0.5–0.7 MPa), operating temperature (15–35 °C), humidity range (30–60 %RH), and machine weight (800–1500 kg). These values are typical reference ranges and must be verified for the specific model and application. The machine is constructed with materials such as stainless steel, aluminum alloy, and polymer blades. It is important to note that the listed parameters are not guarantees of performance; they are provided as directory references for procurement and verification. Always confirm model-specific specifications with the legal manufacturer or supplier.

Working Principle

The solder paste printer operates by loading a PCB and aligning it under a stencil. Solder paste is applied to the stencil's surface, and a squeegee blade moves across it, forcing the paste through apertures onto the PCB pads below. The squeegee pressure and speed are adjustable to control paste volume and stencil contact. The machine's positioning system ensures accurate alignment, and its repeatability ensures consistent alignment across multiple boards. The stencil thickness determines the volume of solder paste deposited. The machine requires a clean, temperature-controlled environment to maintain paste viscosity and prevent moisture absorption.

Common Materials

Stainless Steel, Aluminum Alloy, Polymer Blades

Technical Parameters

Parameter	Typical range	Notes & selection driver
Printing Area (Max)	400×300 mm	Larger boards require custom stencil and machine size.
Printing Speed	10–50 mm/s	Higher speed reduces cycle time but may affect paste deposition quality.
Positioning Accuracy	±0.02 mm	Critical for fine-pitch components.
Repeatability	±0.01 mm	Ensures consistent alignment across multiple boards.
Squeegee Pressure	0–10 kgf	Adjustable to control paste volume and stencil contact.
Squeegee Speed	10–100 mm/s	Affects paste rolling and aperture filling.
Stencil Thickness	0.1–0.3 mm	Determines solder paste volume deposited.
Board Thickness	0.5–5 mm	Must accommodate PCB thickness range.
Power Supply	220 ±10% V AC	Single phase, 50/60 Hz.
Air Supply Pressure	0.5–0.7 MPa	Required for pneumatic components.
Operating Temperature	15–35 °C	Outside this range, paste viscosity changes.
Humidity Range	30–60 %RH	High humidity can cause solder paste to absorb moisture.
Machine Weight	800–1500 kg	Affects floor loading and installation requirements.

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Components / BOM

Vision Alignment System
Precisely aligns the PCB and stencil using optical cameras and fiducial marks.
Squeegee Assembly
Applies pressure to spread solder paste across the stencil and force it through apertures.
Stencil Frame Clamps Part
Securely holds the metal stencil frame in place during the printing process.
Stencil
The laser-cut steel foil whose apertures define where and how much paste goes down.
PCB Positioning System
Supports and locates the board under the stencil before printing.

Applied To / Applications

This component is essential for the following industrial systems and equipment:

Surface Mount Technology (SMT) Line

View system integration details

Manufacturers of Solder Paste Printer

1 company lists this product among what they make. Company figures are quoted from each company's own website; every card states where the relationship came from.

CNSMT

Shenzhen, Guangdong, CN

Also makes: Reflow Oven, SMT Stencil

Listed on the company's own website · profile compiled by CNFX from public sources

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Frequently Asked Questions

What is the role of a solder paste printer in PCB assembly?

It deposits solder paste onto PCB pads through a stencil, enabling subsequent component placement and reflow soldering.

What are the key parameters to consider when selecting a solder paste printer?

Key parameters include printing area, printing speed, positioning accuracy, repeatability, squeegee pressure and speed, stencil thickness, board thickness, power supply, air supply pressure, operating temperature, humidity range, and machine weight. These must be matched to your PCB size and production requirements.

How does stencil thickness affect solder paste deposition?

Stencil thickness determines the volume of solder paste deposited. Thicker stencils deposit more paste, which may be needed for larger components, while thinner stencils are used for fine-pitch components.

Why is positioning accuracy important?

Positioning accuracy ensures that solder paste is deposited exactly on the pads, which is critical for fine-pitch components to avoid solder bridges or insufficient solder.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records.

Preliminary Technical Classification

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pressure:	0.1-0.5 MPa (squeepee pressure range)
flow rate:	50-200 mm/s (print speed)
temperature:	15-30°C (ambient operating range)
slurry concentration:	85-92% metal content (solder paste viscosity: 800-1200 kcps)

Product Specifications

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Application Fit & Sizing Matrix

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