The most commonly matched tools for a CNC oscillating knife gasket cutting machine are oscillating knives and pneumatic knives. If you only cut a single type of material, a single pneumatic knife is enough to meet all cutting needs. If you process multiple materials, you need to combine and match various tools.
Other optional supporting tools include drag knives (suitable for 0.5-3mm thin film gaskets), high-speed spindle tools (also known as milling cutters, ideal for thick and hard materials and hole punching), fixed 400W high-power servo knives (fixed on the X-axis and non-detachable, applicable to extremely hard materials such as 50mm thick hard rubber), and detachable 400W high-power servo knives (adopting belt drive, suitable for thick and soft materials with higher flexibility and faster cutting speed).
The final tool selection depends on the hardness and thickness of the materials to be cut. Trustercnc can equip your purchased machine with tools that satisfy all your cutting requirements. Cooperating with the modular tool head system, it supports quick replacement and plug-and-play operation.
Why Is “Tool Selection by Material” Equally Important as Machine Selection?
Machine performance determines the stability of operation and cutting, while tool selection decides the cutting quality. The two coordinate with each other perfectly.
CNC cutting is a dual-axis system with high coordination between the “machine tool motion system” and the “tool shearing system”. The moving precision of the machine body determines whether the cutting track deviates, while the dynamic characteristics of the tool (such as vibration frequency, amplitude and torque feedback) control the stress distribution when the blade cuts into the material.
If the mechanical properties of the tool and machine cannot match the viscoelasticity or friction shear strength of the gasket material, even if the gantry frame has a repetitive positioning accuracy of ±0.01mm, tensile deformation or hot melting and scorching at the cut edge cannot be avoided.
How Big Is the Cutting Effect Difference of Different Tools on the Same Equipment?
Let’s take an example for illustration. If you use an ordinary electric oscillating knife to cut 10mm high-hardness rubber, insufficient torque will cause the motor to stall and drop frequency greatly under damping extrusion, resulting in severely inclined bevels on the cut section. However, if you switch the tool head to a 400W fixed servo oscillating knife, constant torque output can steadily increase the tangential feeding speed several times, and greatly reduce the section verticality tolerance.
Unmet Cutting Effects: Mismatch Between Tool Capacity and Material
When you find problems such as rough edges of gaskets, round holes turning oval or edge scorching, you tend to think it is caused by excessive mechanical clearance or poor machine quality. But through communication with customers, we have concluded that about 85% of processing defects are caused by the mismatch between the tool working capacity (stroke or torque) and material thickness as well as shear resistance.
For instance, using a small-amplitude electric knife to cut thick silicone gaskets: silicone is soft, highly elastic and has a large friction coefficient, which may jam the blade or generate heat to melt the silicone edge, leading to whitened edges.
How Material Properties Affect Cutting Methods (Soft/Hard/Fiber/Film)
Fiber materials (such as non-asbestos sheets) require high-frequency continuous rigid cutting. Rubber and silicone will produce severe large elastic deformation under compression and strong knife-clamping friction, which requires tools with large cutting stroke and torque compensation. For ultra-thin plastic films, any tiny vertical vibration will cause material wrinkling, so smooth continuous passive cutting must be adopted.
In the processing industry, material cutting behavior is closely related to tool dynamics. Studies show that different materials present distinct fracture modes and stress responses during cutting, especially fiber-reinforced materials are more prone to delamination and tearing. Relevant research reference: “Machining of fiber-reinforced composite materials” Source: https://www.sciencedirect.com
Cutting Difficulties of Different Gasket Materials
Classified by application industries, gasket materials are divided into hard, soft, brittle and thick types. Each material produces different cutting resistance the moment it is cut by the blade.
Academic research and industrial application tests prove that when cutting polymer elastomers or fiber-reinforced composite materials, the interfacial cutting force has a strong non-linear correlation with the tool’s reciprocating impact rate, tangential feed rate and the viscoelastic stress relaxation characteristics of the workpiece itself.
Relevant researches on non-metallic cutting mechanics and material behavior can be found in journals of Elsevier and Springer, such as “Analysis of shearing mechanisms and energy consumption in the cutting of dense elastomeric materials” and “Modeling of tool wear and forces in ultrasonic-assisted cutting of fiber-reinforced rubber sheet”. Unreasonable tool configuration cannot effectively overcome the internal stress of these materials, thus causing various quality defects.
Rubber Gaskets (NBR / EPDM): High Elasticity and Easy Stretching
Rubber has extremely high viscoelastic resilience and is easy to stretch at room temperature. When the blade impacts downward, the rubber first sinks and produces compressive deformation. When the blade moves horizontally, the static friction coefficient between rubber and both sides of the blade is extremely high, generating severe knife-clamping resistance. Insufficient tool torque will lead to uneven feeding speed at the blade tip, causing deformation of gasket round holes and increased dimensional tolerance of outer circles.
Silicone Gaskets: Soft and Easy to Deform with Whitened Edge Issues
Silicone generally has low hardness and is extremely soft, yet it is prone to local micro tensile tearing under high-frequency shearing force. If the reciprocating frequency fails to match the moving speed, high-frequency interference friction between the blade side and silicone will produce tiny stress microcracks on the cut surface, which are exactly the whitened edges we often see on cut silicone gaskets.
PTFE Gaskets: Low Friction, Easy Sliding and Displacement
Polytetrafluoroethylene (PTFE/Teflon) has a low friction coefficient but obvious cold flow property, namely slow plastic deformation under compression. If the tool cannot provide enough instantaneous cutting pressure during processing, the edge of the PTFE gasket will sink downward under extrusion and form an inclined surface. In addition, its self-lubricating property makes the material prone to micro displacement on the vacuum adsorption table, affecting processing positional accuracy.
Non-Asbestos Gaskets: Fiber Structure Prone to Delamination and Burrs
Non-asbestos sheets are mainly made of Kevlar fiber, inorganic mineral fiber and rubber through rolling. These intertwined fibers with high hardness and toughness cause severe blade wear. If an ordinary electric knife is used, the blade will wear quickly. Without timely blade replacement, the blunt blade cannot cut off tough fibers and will pull them out directly from the substrate, resulting in delamination and rough edges of the gasket.
Graphite Gaskets: Brittle Material Prone to Edge Chipping
Pure graphite plates are soft and extremely brittle, easy to cause interlayer peeling and edge chipping. Reinforced graphite gaskets (with a 0.1mm thin stainless steel perforated plate inside) have a sandwich structure of soft exterior and hard interior.
If the tool amplitude is too small and impact force is insufficient, it cannot penetrate the steel mesh instantly. This will cause the soft graphite layer to peel and chip from the steel plate under horizontal dragging force, and make the stainless steel mesh bend and twist at the same time.
Thin Film Gaskets (PVC / PET): Extremely High Precision Requirements
For thin film gaskets below 0.5mm (such as polyester film, PE insulating sheet and PVC washer), high-frequency mechanical vibration will not only cause shaking and displacement of ultra-thin materials, but also leave a row of tiny zigzag notches on the film edge due to disordered blade oscillation within micron-level thickness.
Thin film gaskets require extremely high precision, so 0.1-0.5mm thick film gaskets are generally not cut by electric oscillating knives, but processed by drag knives for smooth passive cutting.
Technical Characteristics and Application Scope of 6 Major Cutting Tools
Tool matching for CNC gasket cutting machine is very particular; it is not simply “the higher the power, the better”. The essential differences of tools equipped on CNC oscillating knife cutting machine lie in reciprocating vibration frequency, amplitude (stroke), torque output mode and cutting force application method.
The correct selection method is to make the tool feeding process highly match the shear resistance and viscoelasticity of gasket materials. Mastering the underlying design differences of ordinary electric knives, pneumatic knives, drag knives, high-speed spindle milling cutters and two types of high-power servo knives can effectively avoid equipment investment waste and ensure processing stability.
Ordinary Electric Oscillating Knife
The ordinary electric oscillating knife is one of the standard configuration tools for CNC oscillating knife cutter. The tool head is driven by a small high-efficiency AC/DC motor through an eccentric shaft mechanism.
Technical Parameters: Amplitude 1mm, motor power 80W, vibration frequency 0 – 18,000 times per minute.
Application Scope: High-frequency and micro-amplitude mechanical vibration delivers extremely smooth cuts. It is mainly used for cutting 1-15mm rubber, 1-5mm non-asbestos sheets, 1-5mm PTFE (Teflon), 1-10mm silicone, cork, graphite plates and lightweight foam gaskets. It provides ultra-high edge precision and processing efficiency when machining low-density and thin materials.
High-Frequency Pneumatic Knife
The pneumatic knife is a heavy-duty cutting tool driven by high-pressure compressed air to push piston operation. It needs to be equipped with an air compressor with air pressure of 0.6MPa-0.8MPa.
Technical Parameters: Amplitude up to 7 – 10mm, stable working air pressure ≤0.7MPa, vibration frequency 0 – 15,000 times per minute.
Application Scope: The super-large mechanical stroke provides ample chip removal space, specially designed for thick and soft materials. It is most suitable for processing 10-50mm EVA foam gaskets, 10-30mm EPE foam cotton, 10-25mm silicone foam gaskets, 10-25mm thermal insulation cotton and 20-40mm compressed felt gaskets. The long stroke of the pneumatic knife prevents the blade side from being stuck by porous materials.
Drag Knife
The drag knife head has no motor drive or pneumatic piston vibration. It completely relies on the pulling force generated by the X/Y axis movement of the cutting machine to make the blade slide rigidly in the material.
Technical Parameters: Power-free pure drag cutting tool.
Application Scope: Perfect for cutting ultra-thin films, including 0.5-3mm PVC gaskets, 0.3-3mm PE film gaskets, 0.3-2mm polyester/PET films, 1-3mm coated/kraft paper gaskets and 0.5-2mm adhesive-backed gaskets. On ultra-thin materials, the drag knife will not cause material wrinkling or edge melting due to high-frequency vibration, and can cut materials smoothly.
High-Speed Spindle Milling Cutter
Specially designed for high-density, hard materials and hole punching operations.
Technical Parameters: Maximum speed up to 60,000 rpm, motor power 350W.
Application Scope: For hard non-metallic materials with excessive hardness and dense fibers that cannot be cut through by reciprocating oscillating blades, the high-speed spindle milling cutter uses rotary cutting to grind materials into powder for discharge. It is suitable for “hole punching” and milling processing of flange bolt holes on thick and hard composite gaskets.
Fixed High-Power Servo Knife
This is a power cutting tool developed by Trustercnc exclusively for high-rigidity, ultra-high tensile and shear resistant materials.
Technical Parameters: Adopting 400W servo motor direct drive transmission; the motor shaft is rigidly and directly connected with the eccentric crankshaft through a coupling. It is fixedly installed on the main sliding guide rail of the X-axis beam of the gantry frame, with ultra-high mechanical deformation resistance rigidity.
Application Scope: The direct drive structure has no belt wear, which can transmit 100% of the strong motor torque rigidly to the tool body with strong load resistance. It is most suitable for cutting 1-50mm high-hardness solid rubber, high-density compact EVA, hard cardboard and other materials with ultra-high shear strength.
Detachable High-Power Servo Knife
This tool is not fixed on the X-axis and can be disassembled for high flexibility. If you have other cutting needs such as grooving and marking, you can remove this knife and install other tools instead.
Technical Parameters: Also equipped with a 400W high-power servo motor, but adopting internal belt drive. Its cutting force is inferior to the fixed servo knife when processing extremely hard materials.
Application Scope: Ideal for processing 1-45mm felt, medium-hard silicone and various high-rebound foam materials. The belt drive provides certain physical damping buffering when cutting materials with alternating hardness and softness. The quick-disassembly design makes multi-variety and small-batch mixed production highly flexible.
How to Match Tools According to Gasket Material and Thickness
If you process a variety of gasket materials, you cannot only consider the material type, but also its thickness. When the thickness increases, the physical extrusion resistance (friction resistance torque) of the material against the blade side rises exponentially.
With years of technical experience and comparative analysis of customer feedback data, the engineering team of Trustercnc has summarized the following “material + thickness” matching scheme to help you make quick tool selection.
Rubber Gaskets (1-50mm)
Rubber gaskets (including natural rubber, NBR nitrile rubber, FKM fluororubber) feature ultra-high elasticity and large deformation resilience.
1 – 15mm rubber: An 80W ordinary electric oscillating knife is sufficient, which ensures cutting precision and saves configuration cost.
15 – 50mm hard rubber: Thick rubber produces strong clamping force on the tool body. Ordinary electric knives cannot handle it at all, and a fixed 400W high-power servo knife (direct drive type) is a must. Its powerful servo closed-loop torque maintains mechanical shearing at 4,000 times per minute to prevent dimensional deviation caused by step loss.
Rubber gaskets (including natural rubber, NBR nitrile rubber, FKM fluororubber) feature ultra-high elasticity and large deformation resilience.
1 – 15mm rubber: An 80W ordinary electric oscillating knife is sufficient, which ensures cutting precision and saves configuration cost.
PTFE and Non-Asbestos Gaskets (1-5mm)
PTFE and non-asbestos fiber sheets are high-toughness and abrasive materials without polymer resilience like rubber, but with strong cutting resistance.
For 1 – 5mm PTFE and non-asbestos sheets, an 80W ordinary electric oscillating knife with a vibration frequency of 18,000 times per minute can cut smooth edges without obvious burrs and delamination.
Note: Non-asbestos materials contain a large number of hard inorganic mineral fibers with strong abrasiveness. Wear-resistant high-hardness tungsten steel alloy blades are required for cutting.
EVA/EPE Foam and Sponge Gaskets (10-50mm)
Such materials have low strength and soft texture but are generally thick and prone to longitudinal extrusion deformation.
Using an ordinary electric knife with 1mm stroke on 10 – 50mm foam parts will make the blade unable to completely exit the cutting seam and hinder chip removal, easily causing foam edge melting due to friction heat.
Equipping a high-frequency pneumatic knife with 7-10mm long stroke is the optimal solution. The long stroke allows the blade to fully exit the cutting seam during reciprocating movement, quickly discharge foam debris, avoid squeezing soft materials, and ensure vertical edges without hot melting.
Silicone and Felt Gaskets (1-45mm)
Silicone (high elasticity and large friction coefficient) and felt (tangled dense disordered fibers) easily cause lateral bending and offset of the tool during cutting.
When processing 1 – 45mm felt or silicone, ordinary electric oscillating knives often fail to cut through or cause fiber pulling and rough edges.
A detachable 400W high-power servo knife (belt drive type) is the best solution. The closed-loop feedback control of the servo motor automatically performs power feedback compensation when the tool enters dense fiber knots (felt).
Meanwhile, the belt drive can absorb reverse mechanical impact caused by sudden increase of cutting resistance, extend the service life of the tool holder transmission part, and greatly improve section verticality.
Ultra-Thin PVC/PE/Polyester Film and Adhesive-Backed Gaskets (0.3-3mm)
For 0.3 – 3mm thin films and adhesive-backed gaskets, reciprocating mechanical vibration (whether electric or pneumatic) will cause high-frequency slight shaking of ultra-thin materials on the negative pressure table, resulting in zigzag edges on small cut rings.
Equipping a passive drag knife for static blade sliding cutting delivers clean and neat sections at high feeding speed without tremor and zigzag lines.
Tool Selection Method for Single Gasket Material with Different Thicknesses
If you only cut a single type of material, you only need to consider the material thickness when selecting tools. Based on a large number of cutting experiments and data summary, we scientifically divide processing thickness into four rigidity levels, with stroke (amplitude) and power as the core decision-making factors to help you quickly match suitable cutting tools.
0.5 – 3mm Thin Materials: Drag Knife / Ordinary Electric Oscillating Knife
Ultra-thin non-metallic materials below 3mm do not require strong cutting force; the key lies in track precision and smooth section.
Thickness ≤1.5mm: Prioritize passive drag knife for high-feed speed drag cutting to prevent oscillation and wrinkling.
Thickness 1.5−3mm: Adopt ordinary electric oscillating knife; the tiny 1mm amplitude ensures dimensional precision of small chamfers and inner holes.
3 – 10mm Medium-Thick Materials: Oscillating Knife / Servo Knife
At this medium thickness, material rigidity and knife-clamping resistance become obvious (especially non-asbestos sheets and hard rubber over 5mm):
Soft materials (silicone, soft PVC, paper card): 80W ordinary electric oscillating knife is sufficient.
Dense and hard materials (PTFE over 5mm, industrial rubber sheet): A 400W high-power servo oscillating knife (belt drive or direct drive type) is required to guarantee cutting penetration force.
10 – 25mm Thick Materials: High-Frequency Pneumatic Knife
For ultra-thick foam, rubber sponge and compressed felt, the cutting pain point is no longer material hardness, but the long chip removal channel inside the cutting seam.
A high-frequency pneumatic knife is mandatory. It uses 7-10mm large physical stroke for continuous impact chip removal and mechanical tool retracting heat dissipation, ensuring vertical cuts of thick foam and soft sponge without dust or scorching caused by friction.
25mm+ Thick Materials: Fixed 400W High-Power Servo Knife
When the gasket thickness reaches 30mm, 40mm or even 50mm, and the material is solid dense high-shear resistant materials (such as heavy-duty foam rubber, ultra-hard polyurethane elastic plate), the impact piston of the pneumatic knife will suffer air backflow and pressure relief due to excessive tangential resistance, making the cutting power trapped in the cylinder.
At this time, a high-rigidity fixed 400W high-power servo knife (direct drive type) is the optimal choice, relying on the high-torque servo motor to advance strongly under the direct drive eccentric sleeve.
In-Depth Comparison: Core Application Boundaries of Two Types of 400W High-Power Servo Knives
Customers often ask why there are fixed and detachable 400W high-power servo knives and what the differences are.
First, the installation mode is different: one is fixed on the X-axis beam and non-detachable; the other is detachable. Second, the driving mode differs: the fixed type adopts direct drive, while the detachable type uses belt drive. Third, cutting capacity: the fixed type delivers better cutting effect when processing extremely hard materials.
Structural Difference Analysis: Beam Fixed Direct Drive vs Modular Detachable Belt Drive
Fixed high-power servo knife: The motor shaft is rigidly connected directly with the eccentric crankshaft (direct drive). The tool frame is integrally fixed on the cast aluminum X-axis beam of the CNC machine tool, featuring ultra-high mechanical rigidity, zero transmission sliding loss and the fullest torque output.
Detachable high-power servo knife: Designed for multi-functional interchangeability, the motor and reciprocating mechanism are driven by high-strength timing belts, and the tool seat itself is a pluggable module. Its transmission path is longer with slight elastic sliding of the belt drive, but it supports convenient tool replacement.
Performance Test: Why Choose Fixed Direct Drive for 50mm Hard Rubber and Detachable Belt Drive for 45mm Felt
Tested by the Trustercnc technical team: when processing 30-50mm solid hard rubber with Shore hardness above 75A, ultra-high density EVA and large-thick cardboard, the fixed direct drive servo knife maintains stable frequency and horizontal feed speed under high-resistance cutting, releases 100% of the peak torque of the 400W motor, and achieves ultra-low section verticality tolerance.
The detachable belt drive servo knife performs better when cutting 1-45mm pure felt, soft silicone and polyurethane sponge. The belt drive has flexible buffering characteristics, which can reduce the frequency of spindle overload alarm when cutting silicone with high elastic recovery rate and easy knife-clamping. Meanwhile, it supports quick replacement of blades with different shapes and specifications, ideal for flexible manufacturing with frequent material switching.
Maintenance & Flexibility: Equipment Investment Suggestion for Mass Production vs Flexible Production
If your factory focuses on single-product high-load mass production (such as professional sealing factories producing tens of thousands of high-hardness rubber flange gaskets and large-thickness sound-insulating EVA parts daily): Prioritize the fixed direct drive high-power servo knife. It has an extremely sturdy structure, ultra-long maintenance-free cycle and no hidden cost of timing belt wear in later operation.
If your factory runs multi-variety small-batch flexible processing lines with variable processes (such as custom special-shaped silicone gasket manufacturers and art felt processing factories): Equip the detachable belt drive high-power servo knife. Its modular tool head system allows you to switch freely between oscillating knives, creasing wheels and high-speed milling cutters, greatly improving the material compatibility of the equipment.
Quick Selection Comparison Table of Gasket Material, Thickness and CNC Tool Matching
Based on real industrial on-site application, material mechanical feedback, tool limit load data and a large amount of customer feedback collected by us, we have sorted out the following quick selection decision comparison table for your tool selection reference (subject to actual cutting effect).
| Gasket Material Category | Material Thickness (mm) | Recommended Optimal Tool Configuration | Alternative / Auxiliary Tool Configuration | Selection Advantages |
| Ordinary thin rubber, soft paper, cork | 1−15 mm | Ordinary Electric Oscillating Knife (EOT-80W) | Drag Knife (for paper parts within 1mm) | Smooth cut section, low maintenance cost and high cost performance |
| Thick solid rubber sheet, high-hardness nitrile/fluororubber | 15−50 mm | Fixed High-Power Servo Knife (400W Direct Drive) | High-Speed Spindle Milling Cutter (for bolt hole processing) | Direct drive high torque, perfectly overcoming knife-clamping damping and ensuring aperture precision |
| Non-asbestos fiber sheet, high-hardness PTFE | 1−5 mm | Ordinary Electric Oscillating Knife (EOT-80W) | Spindle Milling Cutter (for ultra-hard non-asbestos sheets) | Neat sheared edge, inhibiting fiber burrs and PTFE deformation |
| EVA foam, EPE cotton, medium-soft sponge gasket | 10−50 mm | High-Frequency Pneumatic Oscillating Knife (POT) | 400W Detachable Servo Knife (for medium-hardness EVA) | Excellent chip removal with 7-10mm large stroke, no edge hot melting |
| Medium-high hardness silicone gasket, pure felt sheet | 1−45 mm | Detachable High-Power Servo Knife (400W Belt Drive) | High-Frequency Pneumatic Oscillating Knife (for ultra-thick pure felt) | Flexible shock absorption via belt drive, high flexibility and fast cutting speed |
| PVC, PE, PET film, adhesive-backed gasket | 0.3−3 mm | Drag Knife | Ordinary Electric Oscillating Knife (for 3mm thickened PVC) | Pure sliding physical cutting, speed up to 1m/s, preventing edge curling and adhesion |
FAQs
Why does the blade get extremely hot when cutting thick rubber or silicone with an electric oscillating knife, and the gasket side is rough and whitened?
This phenomenon is mostly caused by severe friction heat generated when the tool is tightly clamped by the material.
Rubber and silicone have excellent resilience. The ordinary electric knife with only 1mm short stroke keeps the middle section of the blade stuck in the cutting seam and produces high-temperature interference friction with the material. The high heat not only shortens the service life of cemented carbide blades, but also generates microcracks on the surface of high-elastic silicone (visually presented as whitened and rough cut edges).
Solution: If the thickness exceeds 5mm, replace it with a 400W servo oscillating knife (stroke above 5mm) or high-frequency pneumatic knife directly. Alternatively, you can brush a thin layer of dilute soapy water on the rubber surface or spray Teflon anti-stick spray on the blade before cutting to effectively reduce friction heat generation.
Can I just buy one pneumatic knife to cut all materials to save cost and trouble?
If you process a wide variety of materials, using only one pneumatic knife is definitely not feasible.
For example, using a pneumatic knife with 9mm large stroke to cut 1mm thin paper or PET film, the huge up-and-down impact force of the pneumatic knife will directly shatter or tear ultra-thin materials.
In addition, the piston force of the pneumatic knife is extremely strong. If there is a tiny error in tool tip height control when cutting thin materials, high-frequency hammering will leave deep knife marks on the felt conveyor belt and cause severe equipment wear. It is recommended to match corresponding tools for different materials and thicknesses; otherwise, it may damage the worktable or cause frequent blade edge chipping.
The passive drag knife only relies on the machine’s pulling force to cut, will the blade break easily?
There is no need to worry about this problem at all. Although the drag knife works by pulling force, its handle is equipped with ultra-sensitive dual precision bearings.
When the cutting machine changes moving direction, the blade will automatically adjust the angle according to the horizontal vector pulling force generated by the X/Y axis (process-wise called active tool tip compensation).
It is mainly suitable for 0.3−3mm soft film, PET and adhesive-backed materials. On these materials, the service life of the drag knife is even longer than that of the oscillating knife. However, if you use it to cut 5mm non-asbestos sheets or hard rubber, it will indeed break off instantly when feeding starts.
How to solve the problem of glue sticking on the blade, knife jamming and material sticking when cutting self-adhesive (double-sided tape) backed gaskets?
Using an oscillating knife to cut such adhesive-backed materials often causes this issue. High-frequency vibration generates friction heat, which melts the glue and covers the blade surface, leaving black burnt sticky residues on the cut edges of gaskets.
The R&D team of Trustercnc has conducted actual machine tests with real materials and countless cutting experiments. We have summarized two practical solutions:
For thin adhesive-backed materials: If you process 1-2mm adhesive-backed gaskets, use a passive drag knife directly. Without high-frequency vibration and friction, it produces no heat, so the glue will not melt easily.
For thick adhesive-backed materials such as adhesive-backed foam: When you have to use an oscillating knife, wipe a proper amount of vegetable oil, silicone oil or WD-40 lubricant on both sides of the blade with a rag before cutting. The lubricating layer makes the sticky glue slide off automatically, supporting long-time continuous processing. Spraying soapy water on the blade is also workable.
When cutting flange small gaskets with dense bolt holes, why does the material always shift?
In this case, we usually recommend customers to adopt the following methods:
1. Optimize cutting path: Follow the principle of inside-out and small-to-large during layout, and cut the outer circle last.
2. Zoned vacuum control: Use a CNC gasket cutting machine with a zoned vacuum worktable and turn off the vacuum of uncovered areas.
3. Cover protective film: The CNC gasket cutting machine of Trustercnc is equipped with a film covering system. Lay an ultra-thin PE film (wind-blocking covering film) on the material during cutting. The film covers the cut seams closely following the machine’s movement to block air leakage points and firmly lock the vacuum pressure.
References and Information Sources
ScienceDirect. (2019). Machining of fiber-reinforced composite materials. Retrieved from https://www.sciencedirect.com
Elsevier. (2020). Analysis of shearing mechanisms and energy consumption in the cutting of dense elastomeric materials. Journal of Materials Processing Technology. https://www.sciencedirect.com/journal/journal-of-materials-processing-technology
Springer. (2022). Modeling of tool wear and forces in ultrasonic-assisted cutting of fiber-reinforced rubber sheet. Polymers. https://link.springer.com/journal/10965
