Graphite powder is processed from expanded graphite or flexible graphite. The types of graphite paper can be classified into flexible graphite paper, sealing graphite paper, ultra-thin graphite paper, thermal conductive graphite paper, etc. In the industrial sealing field, sealing graphite paper is the most commonly used. The types of flexible graphite paper, sealing graphite paper, ultra-thin graphite paper, etc. are all very complete and have a wide range of industrial applications.
Graphite paper is made from expanded graphite through pressing, rolling and calcination. It features high-temperature resistance, thermal conductivity, flexibility, resilience and excellent sealing performance. High-quality graphite paper has excellent sealing performance, is thin and light in weight, and is easy to cut. Due to its sealing and heat conduction properties, graphite paper is mainly used in industrial sealing and heat dissipation fields. The graphite paper used for sealing is thin and has the advantages of being easy to cut and process, heat-resistant, wear-resistant, corrosion-resistant, having good sealing performance and a long replacement cycle. The advantages of graphite paper for sealing have played a very important role in the field of industrial sealing. These advantages of graphite paper for sealing can meet the requirements of industrial sealing. Graphite paper for sealing can be processed into graphite sealing rings, graphite sealing rings, graphite sealing gaskets, graphite packing and other graphite sealing products. It can be used for sealing at the interfaces of pipes, valves, pumps, etc., and also for dynamic and static sealing of machinery. Using graphite paper for sealing as the raw material of graphite sealing parts It fully exploits the advantages of graphite paper for sealing and is an indispensable material in industrial sealing production. Graphite paper plays a very important role in the fields of sealing and heat dissipation.
With the acceleration of the upgrading and replacement of electronic products and the increasing demand for heat dissipation management of mini, highly integrated and high-performance electronic devices, a brand-new heat dissipation technology for electronic products has also been introduced, namely the new graphite material heat dissipation solution. This brand-new natural graphite solution takes advantage of the high heat dissipation efficiency, small space occupation and light weight of graphite paper. It conducts heat uniformly in both directions, eliminates “hot spot” areas, and improves the performance of consumer electronics while shielding heat sources and components.
Graphite paper is a graphite product made by chemically treating high-carbon phosphorus flake graphite and then subjecting it to high-temperature expansion and rolling. It serves as the fundamental material for manufacturing various graphite seals.
Its main uses: Graphite paper, also known as graphite sheet, takes advantage of its high-temperature resistance and corrosion resistance.
Graphite powder
The feature of good electrical conductivity enables it to be applied in petroleum, chemical engineering and electronics. Toxic, flammable and high-temperature equipment or components can be made into various graphite strips, fillers, sealing gaskets, composite plates, cylinder gaskets, etc.
With the acceleration of the upgrading and replacement of electronic products and the increasing demand for heat dissipation management of mini, highly integrated and high-performance electronic devices, a brand-new heat dissipation technology for electronic products has also been introduced, namely the new graphite material heat dissipation solution. This brand-new natural graphite solution takes advantage of the high heat dissipation efficiency, small space occupation and light weight of graphite paper. It conducts heat uniformly in both directions, eliminates “hot spot” areas, and improves the performance of consumer electronics while shielding heat sources and components.
The main uses of this new graphite paper application technology: It is applied to notebook computers, flat panel displays, digital video cameras, mobile phones and personal assistant devices, etc.
1. Unstable discharge at the beginning of processing
Cause of occurrence:
At the beginning stage of electrical machining with graphite electrodes, due to the small contact area of the workpiece or the presence of cutting chips and burrs, concentrated discharge occurs. Moreover, due to the large discharge energy (high peak current and wide pulse width), while the pulse interval is too narrow and the jet pressure is too high, the discharge is unstable at the beginning of processing, and even arc-pulling phenomena occur.
Cause of occurrence:
At the beginning stage of electrical machining with graphite electrodes, due to the small contact area of the workpiece or the presence of cutting chips and burrs, concentrated discharge occurs. Moreover, due to the large discharge energy (high peak current and wide pulse width), while the pulse interval is too narrow and the jet pressure is too high, the discharge is unstable at the beginning of processing, and even arc-pulling phenomena occur.
Solution:
1.Before processing, it is necessary to completely remove the chips and burrs adhering to the workpiece, as well as the oxide films, coatings, rust and other substances produced by the heat treatment of the workpiece.
2. Set the current at a relatively low value at the beginning. Then gradually increase it to the peak current and set the jet pressure smaller.
2. Granular protrusions are produced
Cause of occurrence:
1.If the pulse width is set too large, granular protrusions will form at the corners of the electrode, which may cause a short circuit and lead to arc discharge.
2. There are too many processing chips of the electro-erosion products, which cannot be discharged in time. If the Angle of the processing fluid nozzle is set incorrectly, the processing fluid cannot be fully injected into the gap, and the electro-erosion products and processing chips cannot be fully discharged. When the processing depth is too deep, the processing chips cannot be fully discharged and remain at the bottom.
Solution:
1.Shorten the pulse width (Ton), extend the pulse interval (Toff), and suppress the generation of granular protrusions and the formation of electrical erosion products and processing chips.
2. Try to place the nozzle on the side of the electrode. If the processing depth is too deep,
3. Increase the number of electrode jumps, accelerate the jumping speed, and shorten the discharge time.
3. Depressions occur on the bottom surface during processing
Cause of occurrence:
During the electrical discharge machining process, if the pulse interval is too small, the up and down jumping speed of the electrode is slow, and the jet pressure is weak, the processing chips of the electrical erosion products cannot be fully discharged. Moreover, many electrical erosion products adhere to the bottom surface of the electrode, forming carbonized blocks, which are prone to detach during the up and down movement of the electrode, resulting in depressions on the processing bottom surface
Solution:
1. Extend the pulse interval.
2. Increase the electrode jumping speed.
3. Increase the jet pressure.
4. Use a brush to clean the machining chips from the end face of the electrode and the bottom surface of the processing.
4. Uneven roughness and bending of the bottom surface
Cause of occurrence:
Due to the too small pulse interval, the jet pressure is uneven, the gap between the electrodes is too small, and the electro-erosion products cannot be fully discharged. Moreover, they are unevenly distributed on the processing bottom surface. As the processing continues, bending occurs on the bottom surface or the roughness of the processing bottom surface is uneven.
Solution:
1.Increase the pulse interval and set a constant jet pressure.
2. Increase the inter-electrode gap and frequently check the chip removal condition.
Post time: May-07-2025