DEK 157679 520mm Solvent Extrusion Assembly for Screen Printer

DEK 157679 520mm Solvent Extrusion Assembly for Screen Printer

The DEK 157679 520mm Solvent Extrusion Assembly is a specialized replacement component used in compatible SMT screen printer stencil underside cleaning systems. Its main function is to distribute approved cleaning solvent evenly across the designated cleaning area during automatic wet wiping cycles.

In high-volume SMT production, solder paste, flux residue, dust, and process contamination can gradually accumulate underneath the stencil. If cleaning becomes uneven or insufficient, print quality may become unstable and operators may need to perform additional manual cleaning.

Part number 157679 corresponds to the 520mm extrusion assembly. Related parts include 157677 with a 300mm length and 157678 with a 400mm length. Because these assemblies can look similar, correct part-number and dimensional verification are important before ordering.

This component is suitable for preventive maintenance, printer repair, machine refurbishment, and spare-parts inventory for electronics manufacturing facilities.

Cause

Stencil-cleaning assemblies operate repeatedly in an environment involving cleaning solvent, solder paste residue, dust, and mechanical movement. Over time, these factors may affect solvent flow and cleaning consistency.

Typical causes include:

Common symptoms may include:

• Uneven wetting of cleaning paper.
• Insufficient cleaning solvent.
• Excessive solvent consumption.
• Visible leakage.
• Repeated clogging.
• Increased manual stencil cleaning.
• Unstable underside cleaning results.

These symptoms should be checked together with other stencil-cleaning components such as tubing, valves, vacuum units, filters, cleaning paper, and machine settings.

Solution

When the existing extrusion assembly is damaged, permanently blocked, leaking, or unable to distribute cleaning fluid consistently, replacing it with the correct specification can help restore the cleaning system.

For applications requiring DEK 157679, the replacement should match the original:

• Part number.
• 520mm length.
• Mounting points.
• Connection structure.
• Installation position.
• Machine configuration.

Correct identification reduces the risk of purchasing a similar-looking but incompatible assembly.

Before ordering, customers are recommended to provide the original part number, printer model, product photos, and installation pictures. This allows the replacement to be checked more accurately before shipment.

Specifications

Related Model Comparison

Although these parts belong to the same general cleaning-system category, they should not automatically be treated as interchangeable.

The extrusion length directly affects the installation arrangement and cleaning coverage. Always confirm the original part number before replacement.

Application

The DEK 157679 extrusion assembly is designed for compatible automatic screen printer stencil-cleaning systems used in SMT manufacturing.

High-Volume SMT Production

Continuous production lines require reliable stencil cleanliness. Automatic solvent distribution helps reduce contamination under the stencil during repeated print cycles.

Fine-Pitch PCB Assembly

Fine-pitch components such as BGA, QFN, ICs, and small passive devices require controlled solder paste printing. Maintaining a clean stencil underside helps support consistent paste transfer.

Automotive Electronics

Automotive electronics manufacturing often requires stable production over long operating periods. Reliable stencil cleaning helps maintain controlled printing conditions.

Industrial Electronics

The assembly can support screen printer maintenance in industrial control, communication equipment, automation systems, power electronics, and related PCB manufacturing.

EMS Production

EMS manufacturers frequently run different PCB products and multiple production lines. Keeping critical cleaning-system components in stock can shorten maintenance response time.

Typical Maintenance Situations

How It Works

The DEK 157679 extrusion assembly functions as part of the stencil underside cleaning system.

Step 1: Cleaning Cycle Starts

The printer begins the programmed automatic stencil-cleaning process.

Step 2: Cleaning Material Is Positioned

Cleaning paper or another approved wiping material is moved beneath the stencil.

Step 3: Solvent Is Supplied

Cleaning fluid is delivered through the machine solvent system.

Step 4: Fluid Is Distributed

The 520mm extrusion assembly supports even distribution of cleaning liquid across the intended wiping area.

Step 5: Wet Wiping Is Performed

The cleaning material moves across the stencil underside, helping remove solder paste residue, flux contamination, and process debris.

Step 6: Vacuum or Dry Cleaning May Follow

Depending on the machine configuration, vacuum cleaning or dry wiping can be used after the wet cycle.

Step 7: Printing Resumes

Once cleaning is complete, the printer returns to normal solder paste printing.

The extrusion assembly does not directly print solder paste. Its role is to support the stencil-cleaning process so that printing conditions remain more stable.

How To Choose

1. Confirm the Original Part Number

The most important step is checking whether the existing assembly is marked 157679.

2. Check the Length

The three commonly referenced versions have different lengths:

• 157677: 300mm.
• 157678: 400mm.
• 157679: 520mm.

Do not select only by appearance.

3. Provide the Printer Model

The exact printer model helps with compatibility verification, especially where several configurations may exist.

4. Send Clear Product Photos

Recommended photos include:

• Complete assembly.
• Part-number marking.
• Mounting side.
• Connection points.
• End structure.
• Installation position.

5. Compare Mounting Interfaces

Check the connection arrangement, mounting holes, fittings, and overall structure against the original assembly.

6. Confirm Quantity and Delivery Requirement

For urgent maintenance, provide required quantity, destination country, and expected delivery date during inquiry.

FAQ

Q1: What is DEK 157679 used for?

DEK 157679 is a 520mm solvent extrusion assembly used in compatible SMT screen printer stencil underside cleaning systems to distribute cleaning fluid during automatic wet wiping cycles.

Q2: What is the difference between 157677, 157678, and 157679?

The main difference is length. 157677 is 300mm, 157678 is 400mm, and 157679 is 520mm. They should not be considered directly interchangeable without verification.

Q3: When should DEK 157679 be replaced?

Replacement may be necessary when the assembly is permanently blocked, deformed, leaking, mechanically damaged, or unable to provide stable cleaning-fluid distribution after normal maintenance.

Q4: How can compatibility be confirmed before ordering?

Please provide the original part number, printer model, clear assembly photographs, installation pictures, connection details, and required quantity for accurate comparison.

Q5: Can this part solve all stencil-cleaning problems?

No. Cleaning performance also depends on solvent supply, tubing, valves, filters, vacuum components, cleaning paper, mechanical movement, and printer settings. The complete cleaning system should be checked.

Contact Us

Need DEK 157679 520mm Solvent Extrusion Assembly for maintenance, replacement, or spare stock?

Please send:

• Part number.
• Machine model.
• Original product photos.
• Required quantity.
• Delivery country.
• Required delivery schedule.

We can assist with specification checking before quotation and support both single-unit maintenance requirements and regular batch orders.

Send your inquiry with part number 157679 for price, availability, and compatibility confirmation.