Heating Tube Softening Equipment After Shrinking Process

The Critical Need for Post‑Shrink Softening

After heating tubes are filled with insulating powder and subjected to shrinking processes, the metal casing often becomes work‑hardened and brittle. Without proper softening, these tubes frequently crack or even explode during subsequent bending, coiling, or flattening steps. The Heating Tube Softening Equipment from Feihong directly addresses this issue by restoring ductility to the tube material, ensuring that downstream operations proceed without defects.

Key benefits of this softening treatment include:

1. Elimination of Brittleness: The annealing cycle reduces surface hardness to a level that allows safe bending without fracture.

2. Improved Bending Success Rate: Softened tubes can be formed into complex shapes with minimal spring‑back and no cracking.

3. Reduced Scrap and Rework: By preventing breakage, manufacturers save material and labor costs while increasing overall throughput.

4. Versatile Treatment Options: The machine supports both full‑length softening and targeted local softening, giving production planners maximum flexibility.

Technical Data for the Softening Equipment

The Heating Tube Softening Equipment After Shrinking Process is built with rugged industrial components and precise control systems. Below are the detailed technical specifications for the FH‑147 model, which has become a benchmark in the heating tube industry.

These parameters confirm that the equipment can accommodate a wide variety of tube sizes and production volumes, from small‑batch specialty runs to high‑volume continuous manufacturing.

How the Short‑Circuit Softening Process Works

The Heating Tube Softening Equipment After Shrinking Process utilizes a dry‑type transformer and a pneumatic clamping system to establish a secure electrical connection with the tube. When the tube is clamped between electrodes, low voltage and high current are applied, creating a controlled short‑circuit through the tube’s metal casing. This generates intense, uniform heat that raises the tube temperature to the annealing range, effectively softening the material without altering its chemical composition.

This process offers several operational advantages:

1. Rapid Heating: Electrical heating achieves softening temperatures in seconds, minimising cycle times and boosting productivity.

2. Uniform Temperature Distribution: The short‑circuit method ensures that heat is generated evenly across the treated section, avoiding hot spots or cold zones.

3. Localised Control: By adjusting the electrode position and clamping duration, operators can perform local softening on specific tube segments, preserving the hardness of other areas if required.

4. Energy Efficiency: Because heat is generated directly in the workpiece, energy losses are minimal compared to furnace‑based methods.

Industries That Benefit from This Softening Solution

The Heating Tube Softening Equipment After Shrinking Process is utilised across a broad spectrum of industries where heating tubes are a critical component. Feihong’s machinery supports both industrial and civilian applications, ensuring that end‑products meet the highest reliability standards.

Primary application sectors include:

1. Industrial Heating Elements: Used in cable manufacturing, process heating, and large‑scale industrial ovens.

2. Home Appliance Production: Essential for making heating tubes in coffee makers, water heaters, rice cookers, and electric kettles.

3. Hot Runner Systems: Provides softening for heating tubes used in plastic injection molding hot runner nozzles.

4. Aerospace & Defence: Supports production of high‑precision heating components for aircraft and military equipment.

5. Medical Equipment: Used in sterilisation and diagnostic devices that require reliable tubular heaters.

By incorporating this softening equipment into their production lines, manufacturers can reduce failure rates, improve product consistency, and gain a competitive edge in their respective markets.

Why Choose Feihong for Your Softening Needs

As a leading China manufacturer with more than 30 years of specialised experience, Feihong brings unmatched expertise to the design and production of Heating Tube Softening Equipment. The company holds CE, ISO, national high‑tech enterprise, and 7A high‑credit certifications, reflecting its commitment to quality and customer satisfaction.

Feihong’s state‑of‑the‑art manufacturing facility includes six dedicated workshops: powder filling, tube shrinking, machining, mold making, raw material cutting, and final assembly. This vertical integration allows for strict quality control at every stage, from raw material inspection to finished equipment testing.

The company’s philosophy—“to combine science and technology with products perfectly and liberate productive forces with advanced technology”—drives continuous innovation. Feihong has developed numerous customised heating tube machines with unique structures to meet specific client requirements.

With a global export footprint covering Canada, the USA, India, Malaysia, Vietnam, Singapore, Turkey, and Syria, Feihong has earned a reputation as a reliable partner for heating tube manufacturers worldwide. When you choose Feihong, you gain access to not only superior equipment but also comprehensive after‑sales support, including installation guidance, operator training, and spare parts availability.

Frequently Asked Questions

Q: What exactly does the Heating Tube Softening Equipment After Shrinking Process do?

A: This equipment reduces the surface hardness of heating tubes that have become work‑hardened after filling and shrinking. By annealing the tube, it restores ductility, preventing cracking or breaking during subsequent bending and forming operations.

Q: Can this machine perform both full‑length and localised softening?

A: Yes. The machine is designed to handle either full‑length annealing or targeted local softening, depending on the product specifications. This flexibility allows manufacturers to treat only the areas that need softening, saving energy and time.

Q: What is the maximum tube length that can be processed?

A: The equipment can accommodate tube lengths from 100mm up to 4000mm, making it suitable for a wide range of heating tube sizes, from small appliance elements to long industrial heaters.

Q: How many tubes can be processed at one time?

A: The machine can process 1 to 4 tube branches per operation cycle, offering flexibility for both low‑volume and high‑volume production.

Q: Is the equipment compatible with automated production lines?

A: Absolutely. Feihong offers optional automatic feeding and unloading structures that can be integrated, transforming the machine into a fully automated softening station for high‑throughput manufacturing.

Q: What certifications does Feihong have for this equipment?

A: Feihong’s products are CE certified, ISO certified, and hold national high‑tech enterprise and 7A high‑credit enterprise certifications, ensuring compliance with international quality and safety standards.

Q: How does the short‑circuit softening method compare to furnace annealing?

A: Short‑circuit softening is much faster, more energy‑efficient, and provides better temperature uniformity. It also allows for precise localised treatment, which is not possible with conventional furnace annealing.

In conclusion, the Heating Tube Softening Equipment After Shrinking Process from Feihong offers a targeted, efficient, and reliable solution for eliminating hardness‑related defects in heating tube production. With its flexible annealing modes, robust technical specifications, automation readiness, and the backing of a trusted China manufacturer with over 30 years of industry leadership, this equipment delivers tangible improvements in product quality and manufacturing productivity. Whether your focus is on industrial heating elements, household appliances, or advanced aerospace components, Feihong’s softening equipment provides the precision and consistency you need to stay ahead in a competitive market.