Description

INGCO S-SG-NN-ASG4041, Spray Gun – Needle-Nozzle- Air Cap( S-SG-NN-ASG4041)

product details:

In a spray gun, the trio of needle, nozzle, and air cap work together to control and shape the flow of paint as it exits the gun. Here’s a detailed breakdown of their individual functions and how they influence the spray pattern:

Needle:

• Function: The needle acts as a metering rod that regulates the amount of paint exiting the fluid tip (nozzle).
• Size: Needle size is measured in millimeters (mm) and is crucial for handling different paint viscosities. Smaller needles (typically 1.0mm – 1.4mm) are suitable for thinner paints and detailed work, while larger needles (1.8mm – 2.5mm) can handle thicker paints and higher flow rates for covering larger areas.
• Material: Needles are typically made of high-quality stainless steel for durability and corrosion resistance.

Nozzle (Fluid Tip):

• Function: The nozzle, also called the fluid tip, is the final point of passage for the paint before it exits the gun. It shapes the initial spray pattern of the paint based on its internal design.
• Types: There are various nozzle types available, each designed for specific applications and spray patterns. Common types include:
  • Round Tip: Produces a circular spray pattern, ideal for general-purpose painting and covering large areas.
  • Fan Tip: Creates a flat, fan-shaped pattern, suitable for applying even coats and controlling edges.
  • Specialty Tips: Specialized nozzles exist for specific tasks like texture coating, striping, or applying delicate finishes.
• Size: Nozzle size (orifice size) is also measured in millimeters (mm) and corresponds to the diameter of the opening where the paint exits. This, along with needle size, determines the overall flow rate of the paint.

Air Cap:

• Function: The air cap plays a critical role in atomizing the paint and shaping the final spray pattern. It channels compressed air around the exiting paint stream, breaking it up into fine droplets for a smooth and even application.
• Components: An air cap typically consists of:
  • Air Horns: These are channels that direct compressed air towards the paint stream.
  • Air Cap Design: The specific design of the air cap, including the size and arrangement of the air horns, influences the final spray pattern (fan width, roundness, etc.).
• Selection: Similar to nozzles, air caps come in various designs for achieving different spray patterns and finishes.