Epoxy Dispensing Nozzle Spare Parts | JHIMS

JHIMS Epoxy Resin Dispensing Nozzle Assembly

The needle, seal, valve body, and other parts of the epoxy resin dispensing valve are core components, ensuring precise dripping, flow control, and sealing performance. Their quality and design directly impact the accuracy, stability, and lifespan of epoxy resin dispensing. Below is a detailed introduction to these key parts:

1. Needle / Nozzle

The needle directly contacts the glue, controlling its release and flow. For high-viscosity materials like epoxy resin, the needle’s design is critical.

Function: Controls glue outflow and flow rate, typically consisting of a needle head and seat. The needle head’s opening size determines the dispensed glue amount.

Material: Made from corrosion- and wear-resistant materials like stainless steel, hardened steel, or ceramic, ensuring resistance to epoxy resin’s high viscosity and adhesion.

Design Type: Includes round hole nozzles, needle nozzles, and micro needles. Precision dispensing applications use smaller, high-precision needles for fine dispensing.

Cleaning Issues: High-viscosity epoxy can clog needles. Designs facilitate easy cleaning, often with automatic systems to reduce maintenance.

2. Seals (Seals / O-rings)

Seals prevent glue leakage and protect the system under high pressure and adhesive conditions.

Function: Ensure sealing inside and outside the valve body, located at valve body joints, needle-valve interfaces, and glue supply connections.

Material: High-temperature and corrosion-resistant materials like fluororubber (FKM), silicone, or PTFE withstand chemical solvents and heat.

Application Locations: Between needle and valve body, valve body and pneumatic actuator, and pumping system joints to prevent leakage.

Importance: Good seals prevent glue leakage and air ingress, ensuring dispensing stability. Regular checks and replacements are essential.

3. Valve Body

The valve body is the core structure, supporting components like the needle and seals.

Function: Houses components, transmits air pressure or electricity to control glue flow, and provides seal positioning for system sealing.

Material: High-strength, corrosion-resistant metals like stainless steel (304 or 316) or aluminum alloy, sometimes hard-anodized for durability.

Design Requirements: High-precision processing, high-temperature and chemical resistance, and easy maintenance for regular cleaning.

4. Piston

The piston pushes glue flow, controlling delivery in piston dispensing valves.

Function: Reciprocates inside the valve body to control glue release, with position and speed adjusted via air pressure or electricity.

Material: Wear- and corrosion-resistant metals or plastics, tightly fitted to prevent leakage, often with corrosion-resistant sealing rings.

5. Seat

The valve seat works with the needle to prevent glue leakage when closed.

Function: Ensures sealing during valve closure, used with seals for high sealing performance.

Material: Wear- and corrosion-resistant metals or synthetic materials, sometimes coated for enhanced durability.

6. Adjustment Screw

The adjustment screw fine-tunes glue flow and pressure.

Function: Located outside the valve, adjusts the valve opening to control glue flow via bolt rotation.

Material: Corrosion-resistant metals like stainless steel or alloys for stability in epoxy resin environments.

7. Cleaning System

The cleaning system removes residual epoxy to prevent clogging.

Components: Automatic cleaning devices using airflow or solvent injection, and solvents like alcohol or acetic acid for residue removal.

Importance: Ensures valve cleanliness before each dispensing cycle, maintaining performance.

Dispensing Valve Parts Materials

1. Stainless Steel

Features:

• Suitable for most dispensing applications, especially low-viscosity materials.
• Offers good corrosion resistance, wear resistance, and structural strength.

Technical Parameters:

• Hardness: 200-250 HV
• Tensile Strength: 500-600 MPa
• Corrosion Resistance: Good, suitable for water-based glue, silicone
• Service Life: ~500,000 cycles, depending on environment

Advantages: Low cost, easy to process, corrosion-resistant.

Disadvantages: Lower wear resistance, suited for low-frequency or low-viscosity tasks.

Applications: General dispensing tasks with low-viscosity materials like water-based glue.

2. Hardened Steel

Features:

• Ideal for high-frequency or high-pressure dispensing due to high hardness.
• Suitable for high-viscosity glue, extending service life.

Technical Parameters:

• Hardness: 55-60 HRC
• Tensile Strength: 700-900 MPa
• Wear Resistance: Strong, suitable for high-frequency dispensing
• Service Life: ~1 million cycles

Advantages: Excellent wear and impact resistance, high precision.

Disadvantages: Higher cost, brittle under high impact.

Applications: High-viscosity or high-pressure tasks like electronic packaging.

3. Ceramics

Features:

• High hardness and wear resistance for precision and special environments.
• Suitable for high-viscosity and particle-containing glues.

Technical Parameters:

• Hardness: 900-1500 HV
• Tensile Strength: 200-400 MPa
• Temperature Resistance: 200°C-300°C
• Wear Resistance: Extremely high
• Service Life: >1 million cycles

Advantages: High precision, temperature tolerance.

Disadvantages: Brittle, high cost, difficult to process.

Applications: Semiconductor packaging, optical components.

4. Tungsten Alloy

Features:

• Ultra-high density and wear resistance for high-frequency, high-load tasks.
• Ensures stability in high-impact environments.

Technical Parameters:

• Hardness: 500-700 HV
• Density: ~18.5 g/cm³
• Tensile Strength: 700-800 MPa
• Wear Resistance: Very strong
• Service Life: >2 million cycles

Advantages: High density, wear resistance, long-term stability.

Disadvantages: Heavy, high cost.

Applications: High-frequency, precision dispensing in automated lines.

5. Diamond

Features:

• Extremely high hardness for ultra-precise, high-frequency tasks.
• Ideal for high-viscosity or particle-containing glues.

Technical Parameters:

• Hardness: ~3000 HV
• Temperature Resistance: >800°C (inert atmosphere)
• Tensile Strength: Relatively low
• Thermal Conductivity: Extremely high
• Service Life: >5 million cycles

Advantages: Unmatched wear resistance, precision.

Disadvantages: Very high cost, brittle, difficult to process.

Applications: Semiconductor packaging, microelectronics.

6. Plastics (POM, PEEK, Nylon)

Features:

• Suitable for low-load, low-temperature, or high chemical stability tasks.
• Various plastics offer different temperature and mechanical properties.

Common Materials:

• POM: Hardness: 120-150 HV, Temperature: -40°C to 100°C, for low-load tasks.
• PEEK: Hardness: 200-250 HV, Temperature: -50°C to 250°C, for medium-load tasks.
• Nylon: Hardness: 100-150 HV, Temperature: -30°C to 100°C, for low-load tasks.

Advantages: Low cost, good chemical resistance.

Disadvantages: Poor wear resistance, limited temperature range.

Applications: Low-viscosity glue, thin-layer coating.

Material Comparison Table

Applications

These spare parts are ideal for:

• Electronic assembly
• Semiconductor packaging
• Automobile manufacturing
• Medical device production

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