What is a hot melt copper nut? What are its advantages and applications?
Hot Melt Copper Nuts
Copper nuts can be incorporated into plastic components through various methods such as mold pre-burial, hot pressing, ultrasonic insertion and cold pressing. Among these, hot melt embedding is the most common and typical method, generally carried out using a hot melt machine or a manual soldering iron.
Hot Melt Copper Nut Process
The process involves heating the copper nut to a specific temperature to soften the plastic and then pressing it. This method generates minimal internal stress and provides excellent torsional and tensile strength of the nut.
Hot melt nut machine welding principle
Using the principle of electric heat melting, the hot melt nut machine accurately controls temperature changes, combined with mechanical devices, to achieve product welding. This is particularly suitable for products that are difficult to weld, irregular in shape or large. Applications include plastic welding, nut embedding, riveting and more.
Hot Melt Nut Machine Welding Process
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Vibrating Feed Section:
Operators only need to load the required number of copper nuts into the vibrating feeder each shift. The system automatically organizes unordered parts in an orderly manner. The maximum feeding speed is 200 pieces/minute. -
Heating and Power:
The vibrating feeder's copper nuts slide into a high-temperature tube (with adjustable temperature), enter the heating zone for preheating, and then are sent to the machine head for insertion. -
Incorporation:
Preheated copper nuts are pressed into the plastic housing of the machine head. The insertion temperature is adjustable and a limit device is added. -
Movement:
Precise positioning is achieved through programmed control of the X, Y and Z axes.
Selection of holes and plastic nuts
- D: Nut outer diameter
- L: Nut length
- d: Diameter of the nut base
- C: Plastic hole diameter
- W: Plastic hole wall thickness
- Y: Plastic hole depth
- Dimension d represents the base of the nut, also known as the orientation and positioning part, which matches the plastic part C before embedding. Therefore, the end of the nut base d should be smaller than the inner diameter C of the BOSS plastic hole to facilitate positioning.
- Dimension D is the outer diameter of the nut, which corresponds to the diameter C of the plastic inner hole of the BOSS. Generally, the diameter of the plastic inner hole is about 0.25-0.3mm smaller than the outer diameter of the nut.
- Dimension L is the length of the nut, which corresponds to the Y depth of the BOSS plastic hole. Typically, the depth of the plastic hole is 0.5-1.0 mm greater than the height (length) of the nut to accommodate excess plastic.
- W is the wall thickness of the plastic hole. Generally, the thickness of the BOSS plastic hole is 0.8-1.0mm or more, and the larger the nut size, the thicker the wall.
Advantages and applications of hot-melt copper nuts
Benefits
- Ease of assembly and disassembly.
- Provides high pulling force and torque.
- Reusable lines with high locking force.
- Reduces assembly operation skills, ensuring reliable fixation.
- Minimizes the required length space.
- Simplifies hole design, etc.
- Applicable under certain high temperature conditions.
Forms
Hot melt copper nuts are widely used in various industries, including electronics, hardware, plastics, lighting, toys, bathrooms, furniture, medical equipment, sports and more. Examples include plastic casings for laptops, GPS devices, routers, cell phones, wireless communication devices, household appliances, automotive parts, valves, electrical switches, and others.
