What Is the Tapping Technique?

In-mold tapping machine, also called in-mold tapping machine, ^[1] is a device that cooperates with hardware continuous mold to quickly perform screw hole processing at the same time as hardware parts are stamped. It is the most advanced screw hole forming technology for hardware parts at present, breaking the traditional processing method, and its core is to "integrate" the traditional "stamping" and "tapping" technologies directly in the mold.

In-mold tapping machine

In-mold tapping machine is also called in-mold tapping machine, ^[1]

In-die tapping effectively avoids secondary operations (first punching, then tapping), so production efficiency is greatly improved, especially suitable for continuous die, progressive die, precision die

The in-mold tapping technology truly realizes "chipless machining". Because the tapping uses an extrusion tap, no chipping due to cutting is generated during the thread forming process, which achieves clean and environmentally friendly, and the strength of the thread Gets a good improvement. These are incomparable with traditional craftsmanship.

In foreign countries, R & D and production began as early as the late 1970s, such as France, Germany, and Italy. The use of in-mold tapping technology has become very common, especially in the fields of automobiles, electronics, household appliances and so on. The use of this technology has doubled the production efficiency, so it is widely used abroad. After 2005, each tapping technology has gradually matured. Due to the differences in tapping principles, technical capabilities, and service levels, the market share and industry of each in-mold tapping machine manufacturer also varies.

China's mold industry is at a stage of rapid development, and the development level of the mold industry has gradually become an important indicator for measuring the level of manufacturing. The main reason is that as much as 60% -90% of the molds are used in modern industrial supplies, especially in the fields of automobiles, electronics and electrical appliances. In addition, the production of mold molding has advantages that are unmatched by other processing methods such as high precision, high complexity, high uniformity, and high efficiency. Although China's mold industry has maintained a good growth trend, the high-end market of molds in China must rely on imports, especially for some large-scale automotive cover molds, some molds that require ultra-high precision and multi-functional composite molds. The in-mold tapping technology is a kind of multifunctional composite mold. Because in-mold tapping effectively avoids secondary operations, improves operating efficiency, and completely changes the processing technology of metal stamping parts. These high-tech molds It has become the main development direction of the domestic mold industry.

Reduce process and improve production efficiency

The in-mold tapping machine combines punching and tapping of the tapped parts. The tapping and punching are performed simultaneously on the punching machine. Using the in-mold tapping machine can save working time, high tapping accuracy, short time, and improve production. effectiveness.

Standard high-precision thread forming

The in-mold tapping machine can improve the tapping efficiency and accuracy of the tap, and the tap movement exactly matches the screw pitch.

Save labor and energy

The in-mold tapping machine combines tapping and punching of parts into one process, which is fully automated, saving labor costs. And the in-mold tapping machine relies entirely on mechanical transmission, which saves the energy of the machine dedicated to tapping

Reduce defective rate and reduce cost

The precise positioning of the in-mold tapping machine can reduce the probability of damage to the taps, at the same time reduce the probability of waste due to feeding errors, and reduce the probability of feeding errors, reduce the amount of products in stock during processing, thereby saving cost.

Simple installation and easy replacement

In-mold tapping machine design is rugged and durable, small size, easy to install in different molds; tapping head can be replaced with different specifications.

From the number of tapping: single axis, double axis, three axis, four axis, five axis, six axis, seven axis, eight axis, twelve axis and other models.

From the product transmission performance points: mechanical transmission, servo motor transmission, flexible shaft transmission transmission.

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Generally, plastic materials such as low-carbon steel, stainless steel, aluminum and aluminum plywood, brass plates, and copper plates can be processed by this in-mold tapping method.

Application of in-mold tapping machine

1. Electronic and electrical processing, electrical accessories processing, electrical and electronic connectors, electrical switching components, electronic and electrical industries.

2. Various chassis processing, computer accessories, computer industry.

3. Automotive parts, motor housings, automotive industry. Motorcycle accessories industry.

4. Metal stamping dies, metal stamping parts, automotive molds, electrical molds, electronic component molds, metal stamping, computer molds, etc.

5. Air-conditioning, refrigerator, housing, and other stamping products can be achieved.

The in-mold tapping machine adopts the whole machine's fast plug-in installation, which has accurate positioning and easy disassembly.

1 In-mold tapping machine 1, bottom template installation

Production characteristics: During the material conveying and stamping process, the up and down movement is very small, and the mold floats about 0.5 ~ 1mm.

Bottom template installation

2 In-mold tapping machine 2, floating plate installation method (tapping from top to bottom)

Production characteristics: The product has bending and deep drawing, large floating lift, material up and down movement during material conveying and stamping processing, and floating lift pins to lift and convey the material.

Floating plate installation method

3 In-mold tapping machine 3, floating plate installation method two (tapping from bottom to top)

Production characteristics: The product has bending and deep drawing, and the floating height is large. The parts that need to be tapped are blind holes upward. Note: This installation method is generally not used

4 In-mold tapping machine

Production characteristics: The product is special, and the tap cannot normally reach the position of the screw hole. There is up and down movement during the material conveying and punching process, and the tapping area is concave or needs special positioning.