Hot Air Nozzle for Shrinking Catheter Tubing

Hot air nozzle for shrinking catheter tubing is one of the key components of the catheter reflow and lamination machine. Its function is to provide high-temperature hot air to the tube to promote the melting and flow of plastic. The air is heated by an electric heating element to generate high-temperature hot air, and the hot air is evenly sprayed onto the catheter raw material through a special nozzle.

The main functions of the hot air nozzle are as follows:

High-temperature hot air supply

The nozzle can generate high-temperature hot air and transfer heat to the plastic raw material by spraying. The hot air temperature is usually between 200-400℃, which can fully melt and soften the medical tubes.

Hot air flow control

The nozzle can accurately control the flow direction and speed of the hot air through a specific structural design.

Reasonable hot air flow can ensure that the plastic raw material is evenly heated and improve the processing quality.

Heat transfer optimization

The design of the nozzle can also optimize the heat transfer process from hot air to tubes and improve energy utilization efficiency.

For example, the use of porous nozzles or special flow channel designs can improve the hot air flow state.

High temperature resistance

The nozzle needs to work in a high temperature environment for a long time, so it must have good high temperature resistance.

It is usually made of high temperature resistant alloy materials, such as stainless steel, nickel-based alloys, etc.

Nozzle design features

  • Depending on different application requirements, the nozzle can be in different forms such as multi-hole, and ring.
  • Multi-hole nozzles can achieve more uniform hot air distribution. Ring nozzles can surround the surface of plastic raw materials with hot air.
  • Nozzle shape and size can be customized according to the required hot air distribution. It can be designed into different cross-sections such as round and rectangular.

Performance requirements:

  • Sufficiently high temperature and sufficient hot air need to be provided to ensure that the plastic is fully melted and flowed.
  • The hot air temperature and flow rate need to be stable and controllable to avoid local overheating or cold spots.
  • The nozzle structure design should be reasonable to ensure that the hot air is evenly distributed on the surface of the plastic raw material.
  • High temperature resistance, wear resistance, long service life, and easy maintenance.

In general, the hot air nozzle of the catheter reflow and lamination machine is a key component for realizing high-temperature processing of plastics, and its design level directly affects the performance and reliability of the whole machine. Reasonable nozzle structure design can effectively improve the heat shrinking.

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