Heat welding is achieved through a chemical (exothermic) reaction between aluminum and copper oxide, producing high-temperature copper liquid, suitable for the welding of metals such as purple copper, brass, bronze, steel, stainless steel, and pig iron. The process requires no external energy or power source, and its chemical reaction equation is:

3Cu2O + 2Al = 6Cu + Al2O3 + heat (temperature up to 2700°C)

Its primary advantages:

The current carrying capacity of the welding point exceeds the conductor's current carrying capacity.

2. Connection points will not naturally come loose.

3. Corrosion-resistant

4. The connection points are molecularly bonded.

Main Factors Affecting Welding Quality:

1. Water vapor

2. Welded joint of the material is not clean.

3. Molds contain moisture or are not clean.

Investment Casting Mold

Investment molds are made of materials, mainly consisting of the mold body, mold cavity, mold cover, etc., capable of withstanding temperatures to allow metals to melt within them. They offer various welding methods, such as straight line, T-shaped, and cross-shaped, etc.

(2) Mold Clamps

Used for securing mold cores for ease of construction operations.