In high-temperature and high-pressure pipeline systems of heavy industries such as petrochemical, nuclear power, and metallurgy, graphite gaskets are widely used in flange seals, pressure vessels, and industrial pipeline systems due to their excellent high-temperature resistance (up to 3000℃ in non-oxidizing environments) and corrosion resistance.
However, graphite gaskets are prone to burrs, edge chipping, powder falling, or tiny cracks during cutting. This not only increases the scrap rate but also adds subsequent manual processing work, which is time-consuming and labor-intensive. Labor costs and time costs rise accordingly, which is a troublesome problem for graphite gasket manufacturers.
This article analyzes how to use a CNC oscillating knife gasket cutting machine to completely avoid edge burrs, slag falling, and cracking during graphite gasket cutting from the aspects of graphite material characteristics, causes of burrs, working principle of oscillating knife cutting, tool and parameter selection, and batch processing stability.
Why Are Graphite Gaskets Harder to Cut Than Rubber Gaskets?
Rubber is elastic and softer than graphite, while graphite has a microscopic crystal structure with higher hardness. It is the contradictory “soft yet brittle” characteristic of graphite that makes it extremely prone to burrs and edge chipping during processing.
Root Cause of Graphite’s “Brittle and Powder-Falling” Property
Graphite is composed of stacked carbon atom layers. Carbon atoms are tightly bonded within the same layer, but the van der Waals force connecting the layers is very weak. When traditional tools or punching machines cut graphite, the lateral pulling force generated by the blade edge is often greater than the interlayer bonding force of graphite, causing direct slippage and tearing of the layers—this is the “powder falling” and edge cracking we see.
According to material research data, expanded graphite has an obvious layered stacking structure and is prone to edge peeling and particle shedding during mechanical processing. For relevant research, please refer to:
https://www.sciencedirect.com/topics/engineering/expanded-graphite
Why Do Burrs Occur Most Easily When Cutting Inner Holes?
Flange gaskets usually have dense inner holes and bolt holes. When cutting small-diameter inner holes, the tool needs to turn at high frequency within a very small circle. At this time, the centrifugal force and torque generated by the tool inside the material are instantly amplified. This concentrated torsional stress easily damages the fragile hole walls of graphite, causing many burrs or even direct corner missing on the inner hole edges.
Solution: If the hole diameter is less than 5mm, a punching tool can be used, and the punched holes will not have any burrs.
Why Do Thick Graphite Gaskets Chip More Easily?
As material thickness increases (such as graphite sheets over 3mm), cutting resistance rises exponentially. When the blade penetrates downward, the friction between the tool body and both sides of the graphite kerf increases sharply.
If a mechanical drag knife without high-frequency vibration is used, the huge downward and forward thrust will cause the uncut underlying graphite to fail to withstand the pressure, resulting in large-area “edge bursting” or block peeling. So choosing the right tool is also very important.
5 Most Common Quality Problems in Graphite Gasket Cutting
Based on years of actual production experience and cases, we believe that the scrap of graphite gaskets in many gasket factories is usually not due to completely wrong overall dimensions, but to some detailed problems. By figuring out these easily overlooked details, we can continuously optimize process parameters, improve finished product quality, and further increase the yield rate.
If you also encounter the following situations in production, your cutting method or equipment configuration may have serious deviations.
Fuzzy and Uneven Cut Edges
This is the most common and intuitive defect, especially for low-density flexible graphite. It is usually because a dull and worn blade is used, or the cutting speed is too fast, so the blade does not really “cut” the graphite fibers but “tears” them forcefully, leaving uneven rough edges.
Powder Falling After Cutting
The edge looks cut off, but a lot of black graphite powder falls off when touched by hand. This means strong microscopic crushing damage occurred during cutting. Once such gaskets are installed on precision valves, the falling dust will seriously pollute the fluid medium in the pipeline. It may also contaminate the machine guide rails and vacuum system.
Tearing or Corner Missing at Small Holes
As mentioned earlier, when processing small bolt holes or small-diameter sealing holes, if the tool offset compensation is set incorrectly or the cornering speed is not reduced, the lateral swinging force of the blade when turning will directly tear off a piece of graphite on the hole wall. So using an oscillating knife to cut small holes is not suitable at this time, and punching is the most appropriate method.
Inconsistent Cutting Sizes
For example, the gaskets cut in the morning are fully qualified and normal, but the same gaskets cut in the afternoon have deviations of several millimeters in size. This is usually because the vacuum adsorption force at the bottom of the machine is unstable or the tool is worn and dull, causing tiny, invisible displacement (material shifting) of the graphite sheet on the worktable.
Inclined Cuts Reducing Sealing Performance
In the high-precision sealing industry, flange gaskets require absolutely 90-degree vertical cuts. If the cut edge is an inclined “V-shaped edge”, it will cause uneven contact surfaces and easy deformation and leakage under pressure during installation. Inclined edges are usually caused by blades that are too thin and lack rigidity, bending and deflecting under the high resistance of thick graphite.
The Key to Burr-Free Cutting Is More Than Just “Sharp Blades”
Many factory owners may first think the blade is dull when encountering burrs and replace it with a sharp one immediately. However, burrs still exist after replacing the new blade. This is because pure physical sharpness cannot solve the tearing problem of brittle layered materials.
What you need is to change the cutting method from “hard cutting” to “high-frequency micro-cutting” — this is the biggest advantage of CNC oscillating knife cutting technology.
Why Do Many Machines Cut Fast But Not Cleanly?
Graphite is a “brittle + layered” material. If the cutting speed is too high, the tool will cause lateral tearing and edge cracking, easily producing burrs and chipping. So if you blindly increase the machine running speed to pursue output, the forward speed of the blade will exceed its up-and-down cutting speed. This is like sawing wood with a saw — if you do not saw up and down but push hard forward, the wood will definitely be torn.
How Does High-Frequency Vibration Reduce Graphite Tearing?
The Trustercnc CNC oscillating knife cutter relies on the tool to vibrate slightly up and down at an extremely high frequency of 10,000 to 18,000 times per minute, instead of simple cutting. This high-frequency micro-vibration greatly reduces cutting resistance and avoids interlayer pulling, edge chipping, and graphite powder falling.
In CNC processing of brittle and layered composite materials, cutting resistance is the direct cause of edge cracking. Studies show that high-frequency vibration-assisted cutting can reduce the instantaneous cutting force by more than 60% because the tool and material are in a high-frequency “contact-separation” pulse state.
This microscopic pulse force effectively suppresses macroscopic tearing and extrusion deformation between material layers, ensuring the integrity of cut edges and extremely low surface roughness. Relevant research results can be found in Springer journal papers such as “ Experimental investigation of cutting forces and edge quality in high-frequency oscillating knife cutting of soft polymers ”.
Source: https://link.springer.com/journal/11740
This tiny high-frequency vibration cutting disperses the huge single lateral dragging force into countless tiny vertical cutting forces, ensuring that graphite layers are cut neatly before being peeled off, completely eliminating burrs.
Why Does Excessive Cutting Pressure More Easily Cause Burrs?
In actual cutting, we have encountered some customers who think the material is hard to cut through because of insufficient cutting pressure, so they blindly increase the cutting pressure. This judgment and solution are obviously incorrect. Graphite has very low compressive strength.
If the down-force of the machine head is set too high, the tool holder presser foot will firmly press on the graphite surface, leaving deep indentations on the material. Excessive extrusion will also damage the crystal structure on both sides of the kerf. When the blade leaves, the damaged edges will break and fluff. The correct method is to adjust the vibration frequency and cutting strategy.
Which Tools Are More Suitable for Graphite Gasket Cutting?
Due to the physical characteristics of graphite, tool selection is very important. For graphite sheets of different thicknesses and materials, the angle, thickness, and vibration mode of the blade must be accurately selected. A correct tool can eliminate 80% of burr risks from the physical source.
What Materials Are Suitable for 30°, 45°, and 60° Blades?
The smaller the tool tip angle (such as 30°), the sharper the blade edge and the lower the cutting resistance. It is very suitable for cutting ultra-thin (0.5mm) and fragile flexible graphite paper. But the problem is that the tool tip is extremely fragile and easy to break. Thick blades with blunt angles of 45° or 60° are more suitable for cutting medium-thick graphite sheets over 3mm. The tool body has strong rigidity and can effectively prevent deflection causing inclined cut surfaces.
Why Do Dull Blades More Easily Cause Graphite Edge Falling?
When cemented carbide blades become slightly worn and dull after cutting abrasive graphite for a long time, they no longer “cut” the graphite fibers but “break” them. This dull impact directly causes chipping and edge falling of brittle graphite edges. Regularly checking and replacing worn blades can effectively avoid fluffy edges on graphite cuts.
When Should a Pneumatic Oscillating Knife Be Used?
When processing high-density pressed graphite sheets over 3mm thick, ordinary electric oscillating tools (EOT) will have serious insufficient torque, causing tool jamming or step loss. At this time, you must switch to a long-stroke (such as 8mm) pneumatic oscillating tool (POT) with larger amplitude and stronger penetrating power.
If the thickness exceeds 10mm, you should choose a 400W high-power servo oscillating knife. These two tools are the best choices for cutting thick graphite sheets.
Key Parameters Determining Graphite Gasket Cutting Quality
Having a good machine does not mean you can cut high-quality finished products. The key lies in how you use the machine. If parameters are set incorrectly, you still cannot cut qualified graphite gaskets. For example, speed, frequency, and depth — each variable affects the flatness of the edges.
What Problems Are Caused by Excessively Fast Cutting Speed?
Excessively fast feed rate is the main cause of burrs. The tool does not have time to cut the material ahead with high frequency, forming strong lateral tearing. This not only causes serious jagged rough edges but also the strong thrust may even invalidate adsorption, leading to serious displacement (material shifting) of the graphite sheet.
How Does Vibration Frequency Affect Cut Edge Quality?
Generally, cutting brittle graphite materials requires increasing the vibration frequency as much as possible, so that the blade makes more up-and-down cutting movements per unit forward distance. This makes the cut smoother. The more stable the frequency, the flatter the cut edge; large frequency fluctuations easily cause periodic burrs.
Why Does Cutting Depth Directly Affect Burrs?
The correct cutting depth should just cut through the graphite sheet and penetrate about 0.5mm into the underlying breathable felt. If the cutting depth is too shallow, the uncut underlying graphite fibers will be torn when you take off the gasket, leaving extremely ugly bottom rough edges. If the cutting depth is too deep, the huge friction between the blade and the felt will cause the blade to heat up and vibrate, leading to rough cuts.
What to Note When Cutting Different Types of Graphite Gaskets?
From talking with customers, we learned that the materials they cut are rarely pure graphite. To increase strength, various interlayers and reinforcing materials are usually added to graphite. So you must flexibly adjust the cutting strategy according to the material composition.
Cutting Skills for Pure Flexible Graphite Paper (0.5mm-3mm)
For pure flexible graphite paper coils under 3mm thick without any reinforcing interlayers, drag knife cutting is the best solution. Match it with a cemented carbide tungsten steel single-edge blade with a thickness of only 0.63mm and a tool tip angle of 45° or 60°. The extremely sharp tool tip angle minimizes the cutting resistance section. With a little down-force, you can easily cut through graphite paper without any burrs on the edges.
Cutting Skills for Reinforced Graphite Sheets
For tightly pressed high-strength graphite sheets, focus on tool deflection. Choose wide-edge oscillating blades with a thickness between 1.0mm-1.5mm and reduce the cutting speed appropriately to ensure verticality.
How to Avoid Tool Damage When Cutting Graphite Gaskets With Metal Mesh?
Many graphite sheets are sandwiched with 304 stainless steel wire mesh or stamped tin sheets.
Note: Never use tungsten steel oscillating knives to cut this material hard! It will cause the blade to break instantly, and the metal wire will be pulled out to form terrible barbs. For this composite material, you must select the Trustercnc high-speed electric spindle (Router) tool, and the material thickness cannot exceed 1mm.
Through high-speed milling at 24,000rpm, graphite and stainless steel mesh are ground and cut seamlessly at the same time to achieve extreme smoothness.
How to Improve Penetration Rate of High-Strength Graphite Composite Sheets (No Metal Interlayer)?
When processing high-strength pressed graphite sheets with a thickness of 3mm-8mm, electric oscillating tools (EOT) are no longer suitable. At this time, you must switch to long-stroke pneumatic oscillating tools (POT).
Blades should also choose symmetrical double-edge straight knives. The double-edge structure can discharge tiny graphite powder generated by cutting along the blade edge during high-frequency up-and-down stabbing, reducing friction between the tool body and the kerf hole walls, and preventing graphite powder from being re-extruded at the cut to form secondary burrs.
Why Do Many Factories Need “Secondary Edge Trimming” When Cutting Graphite?
Sometimes when we conduct research in traditional sealing parts processing factories, we find several workers sitting next to the machine during visits, filing or sanding the cut graphite gaskets. This seemingly common “post-processing” is the main reason for reduced factory efficiency, increased time costs, and higher labor costs.
Where Does Manual Edge Trimming Waste Resources?
Manual edge trimming is not only extremely time-consuming (the trimming time of a complex flange gasket may exceed the machine cutting time) but also the manual grinding force cannot be standardized. If you grind too much by accident, the originally qualified tolerance becomes scrap. More importantly, grinding not only produces a lot of graphite dust pollution but also seriously damages workers’ respiratory health.
What Process Problems Lead to Increased Post-Processing?
From communicating with many gasket manufacturers, we learned that most cases requiring secondary edge trimming are because early cutting methods such as laser cutting, stamping tearing, worn dull tools, mismatched parameters, or unstable material adsorption caused excessive burrs on cuts that failed customer factory acceptance, forcing secondary manual processing.
How to Reduce Manual Edge Trimming Through Equipment Parameters?
The Trustercnc CNC high-frequency oscillating knife cutting machine can match the correct single-edge or double-edge tools, set a constant medium-low feed rate matching the thickness, and ensure firm high-pressure vacuum adsorption. After adjusting appropriate cutting parameters, the cut graphite edges are smooth and tidy without any burrs, requiring no manual secondary grinding. They can be packed and shipped directly after cutting.
Why Does the Yield Rate Drop During Batch Cutting of Graphite Gaskets?
Over the years, we have noticed a phenomenon: many bosses are very satisfied with the burr-free cutting effect when watching machine samples. But after buying the machine back to the factory for large-scale continuous production for a period of time, burrs appear again and the yield rate drops. This is not because the machine is getting worse, but because you have ignored several important issues in mass production.
Tool Wear After Long-Time Cutting
Graphite looks soft, but it contains trace impurities and is slightly abrasive to tools. After long-term continuous high-load cutting, the tool tip will inevitably become micro-dull. If you do not regularly check and replace blades (such as replacing blades every 2000 meters cut), the yield rate will definitely drop.
Dimensional Errors Caused by Unstable Material Adsorption
When cutting the first full sheet, the vacuum table is fully covered with the strongest adsorption force. But as the sheet is gradually cut into scattered gaskets, a large amount of vacuum negative pressure leaks along the kerfs. If your vacuum pump power is insufficient, the remaining materials will be hard to adsorb (the smaller the cutting area, the weaker the adsorption force), causing tiny vibrations and a batch increase of burrs.
Trustercnc is equipped with a 12KW high-power multi-zone turbo fan as standard and adopts the film covering method (covering a layer of plastic film on the material), perfectly solving the problem of small-area materials failing to adsorb.
Why Are Small-Size Gaskets Easier to Shift?
When cutting large flange gaskets, the material’s own weight plus adsorption force is very stable. But for tiny gaskets with a diameter of only 50mm, the adsorbed area is too small. When the tool circles at high speed, tiny gaskets are easily carried and shifted. For tiny parts, appropriate over-cut compensation must be set in the software, and the cutting and lifting speeds should be reduced as much as possible.
Hidden Factors Affecting Graphite Gasket Cutting Efficiency
In addition to the cutting capacity of the equipment itself, daily operating habits and software layout planning also greatly affect your production efficiency.
Why Does Layout Affect Cut Edge Quality?
If two thick graphite gaskets are placed too close during layout (such as only 1mm spacing), when the tool finishes cutting the first gasket and moves to the second, the extremely narrow waste graphite edge between the two kerfs will break because it cannot withstand the side extrusion of the blade.
These broken residues will be drawn into the blade edge, causing subsequent cutting burrs. Reasonably setting part gaps (usually 3-5mm for thick sheets) is a prerequisite for ensuring a clean cutting environment.
Why Do Small Hole Spacings Easily Cause Material Breaking?
Similarly, when the distance between bolt holes and edges on graphite gaskets is too narrow (wall thickness is too thin), tool impact easily causes this thin wall to break. Trustercnc’s software control system + intelligent nesting software supports optimizing cutting sequence, such as “cut all inner holes first, then cut the outer contour at last”. In this way, the peripheral waste part provides solid support for cutting inner holes, greatly reducing the breakage rate.
How to Reduce Dust Accumulation During Continuous Cutting?
Although the oscillating knife does not perform large-area milling, it still produces extremely fine dust when cutting graphite fibers instantly. If dust accumulates in the kerf for a long time, it will increase tool friction and heating.
Regularly clean the table with compressed air or select a machine head follow-up dust collection device, which can ensure smooth cut edges and maintain the workshop environment and protect the machine’s precision electrical appliances.
Trustercnc CNC gasket cutting machines can be equipped with dust collection devices and air guns for cleaning the table.
Industries With the Highest Requirements for Graphite Gasket Cutting Quality
Graphite gaskets are often used in dangerous and harsh industrial environments. These industries have extremely high sealing requirements and do not allow any defects. This is why many graphite gasket manufacturers require graphite gaskets cut by CNC cutting machines to be burr-free.
Chemical Pipeline Sealing Industry
Pipelines in chemical plants often transport highly toxic or strongly corrosive chemical reagents. Tiny edge burrs or corner missing will become breakthroughs for medium penetration, and leakage will cause serious consequences.
Oil and Gas Flange Sealing Industry
Flanges in deep-sea drilling platforms and refineries bear ultra-high pressure of hundreds of megapascals. Any uneven flatness caused by cutting collapse will become a fatal stress concentration point when installed under force.
High-Temperature Equipment Sealing Industry
Such as iron and steel metallurgical furnaces and nuclear power plant loops. The ambient temperature of these places is as high as thousands of degrees, requiring metal interlayer reinforced graphite gaskets to have an absolutely complete structure, and metal wires are never allowed to be exposed or scattered.
New Energy and Battery Equipment Industry
In some high-end battery manufacturing and hydrogen fuel cell plate sealing fields, graphite gaskets (and bipolar plates) have extremely high requirements for dimensional accuracy and cleanliness, and no tiny falling dust is allowed to pollute the battery cells.
How to Judge If a CNC Oscillating Knife Gasket Cutting Machine Is Suitable for Cutting Graphite
First Check the Stability of the Vibration System
When buying a CNC oscillating knife cutter, you’d better visit the factory on-site and ask the manufacturer to demonstrate cutting live. Focus on observing the machine’s vibration frequency and chassis rigidity. Check if the machine body shakes violently under high-speed and high-frequency vibration? Does the tool head adopt a modular quick-change design? Can it provide large-stroke pneumatic oscillating tools (POT) and high-power servo tool options to deal with thickened reinforced graphite sheets?
Then Check the Vacuum Adsorption Capacity
Take a 5mm thick, 20cm × 20cm graphite sheet for test cutting, and observe if the sheet slides even 1mm when cutting the edge. A qualified machine must have multi-zone independent pneumatic valves (the table of Trustercnc CNC gasket cutting machine has 8 independent vacuum adsorption zones), and the adsorption table should adopt aviation-grade high-strength honeycomb structure to ensure absolutely uniform and strong air distribution.
Whether It Is Equipped With Nesting Software
Nesting software is crucial in expensive material cutting, as it can save you huge material costs. Trustercnc intelligent nesting software has an intuitive and easy-to-operate interface, built-in 2D CAD functions, and a library of variable-shape parts.
It can automatically set entry curves and feed rates; the software supports both fast manual nesting and intelligent automatic nesting to maximize sheet utilization. In addition, it has functions such as ERP/MRP integration, sheet inventory management, work order processing, cost accounting, and material utilization management reports.
Truly Stable Burr-Free Cutting Depends on “Detail Control”
Equipment Is the Foundation, Process Parameters Are More Critical
No matter how good the equipment is, you still cannot cut ideal finished products if the cutting parameters are set incorrectly. Graphite raw materials from different manufacturers, different thicknesses, and interlayer ratios all require engineers to find the perfect balance in the combination of equipment feed rate, vibration frequency, cutting depth and other parameters.
Why Do the Same Machines Produce Very Different Cutting Effects in Different Factories?
If two different gasket manufacturers use the same machine from the same manufacturer, one cuts graphite gaskets with burr-free edges and the other cuts with burrs, it is very likely that the manufacturer with burrs has incorrect cutting parameter settings, such as excessively fast cutting speed or using poor-quality blades that are severely worn and rolled.
Graphite Gasket Cutting Truly Requires “Stable Repeatability” Instead of Single Effect
It is not difficult to cut a perfect burr-free gasket during the manufacturer’s test cutting. The real cutting challenge is that when the machine works continuously for a long time, for example, when cutting the 1000th graphite gasket, it can still maintain exactly the same tolerance and clean, flat burr-free edges as the first one. This extreme stability and repeatable accuracy are the most important.
In fact, stable repeatability and repeatable accuracy are crucial whether cutting graphite gasket materials or any other flexible materials. The repeat positioning accuracy of Trustercnc CNC gasket cutting machines is ±0.01 mm.
FAQs
Our factory’s graphite gaskets are sandwiched with 304 stainless steel wire mesh (reinforced composite graphite). Can this oscillating knife cutting machine cut them directly? Will the blade break?
Never use cemented carbide (tungsten steel) oscillating blades to cut composite graphite plates sandwiched with stainless steel wire mesh! Metal mesh is extremely tough. If you cut it hard with a physical blade, the blade will chip or break instantly, and the metal wire will be pulled out to form serious sharp barbs (curled edges).
For this material, Trustercnc equips CNC gasket cutting machines with a modular tool head system. When encountering metal composite interlayers, you need to select and switch to the high-speed electric spindle (CNC Router) module for the machine tool.
The system will use a special cemented carbide coated milling cutter with a speed of up to 24,000rpm to “grind” and cut the stainless steel mesh and graphite synchronously at an extremely high linear speed. This composite process can ensure absolutely smooth and curl-free edges of metal interlayer graphite.
Graphite dust is highly conductive. Will the dust generated during cutting enter the machine control cabinet and cause electrical short-circuit burnout?
You can rest completely assured about this.
The CNC oscillating knife cutting machine specially designed for graphite processing by Trustercnc has deeply enhanced protection level. Our precision guide rails and gear racks are all tightly wrapped with fully enclosed dust-proof bellows. More importantly, the core electrical control cabinet adopts a high-grade dust-proof and sealed design, which physically isolates conductive dust 100%.
At the same time, if the high-speed milling module is selected, the tool head is also equipped with a follow-up strong industrial dust hood as standard, which extracts the dust instantly when it is generated, ensuring absolute safety of the workshop environment and the machine core.
What is the minimum inner hole diameter that the machine can cut? If the flange bolt holes are only 3mm-4mm in size, can the oscillating knife cut them roundly?
For extremely tiny inner round holes of 3mm-4mm, relying solely on the blade to “draw a circle” at high frequency cannot achieve smooth cutting due to the physical width of the blade itself and graphite resistance. The cutting line is difficult to close perfectly, and it is easy to cause hole wall cracking.
To solve this pain point, Trustercnc equips CNC gasket cutting machines with punching tools. You can install an oscillating knife and a punching head on the tool head at the same time. Set the task parameters in the software control system, and the system will automatically switch to punching mode according to task allocation, perfectly punching out tiny round holes with extremely flat edges and absolute standards.
This not only avoids the deformation risk of the blade cutting small circles but also greatly improves the overall processing speed of complex porous cylinder gaskets.
When cutting ultra-thin pure flexible graphite paper (such as 0.5mm or 1mm), must a high-frequency oscillating knife be used?
For pure flexible graphite coils under 1.5mm thick without any metal or high-strength fiber reinforced interlayers, electric oscillating tools (EOT) are not required. Using a drag knife is the best solution, matched with an extremely sharp single-edge blade with a tool tip angle of 45° or 60°. Relying solely on the sharpness of the tool tip can smoothly cut thin graphite paper easily. This method is extremely fast, with clean and flat edges, and almost zero tool loss.
We now cut graphite manually or with old equipment. Although there are burrs, it can barely be used. How long will it take to recover the cost by investing in this burr-free CNC gasket cutting machine?
First, you save the time cost and labor cost of manual secondary grinding.
Second, your scrap rate is almost zero.
Third, the intelligent nesting software (Nesting Software) equipped as standard with Trustercnc can increase the utilization rate of expensive graphite sheets by more than 15% through gap insertion and hole nesting.
Usually, factories processing high value-added valves and pipeline seals can fully recover the purchase cost within 6-8 months of equipment operation through saved labor, waste materials and surging high-end orders.
References and Information Sources
ScienceDirect. (2023). Expanded graphite material characteristics and machining behavior. https://www.sciencedirect.com/topics/engineering/expanded-graphite
Müller, K., & Bauer, T. (2021). Experimental investigation of cutting forces and edge quality in high-frequency oscillating knife cutting of soft polymers. The International Journal of Advanced Manufacturing Technology, 115, 2841–2855. https://link.springer.com/journal/11740
