Sampling mechanism and method for stacked material stack

Abstract

The invention discloses a sampling mechanism and a sampling method for a stacked material stack, a stacked material comprises a material layer, and the sampling mechanism comprises a rack and two rows of suction devices symmetrically arranged on the rack; each row of suction devices comprises a plurality of suction cups arranged at intervals in the length direction of the material layer and a driving shaft. The driving shaft inclines outwards to a preset angle around the axis parallel to the length direction of the material layer after the sucking disc sucks the target material layer, so that the target material layer forms a controllable tensioning and bending state in the width direction to weaken interlayer attachment and induce stripping; and then the suction device horizontally retracts in the axis direction of the driving shaft, relative displacement in the length direction is applied to the target material layer, the tensioning bending state is released, and therefore the target material layer is separated from the adjacent layer. The sampling method comprises the steps of positioning adsorption, controlled tensioning and retraction stripping. According to the scheme, interlayer controllable separation can be achieved under the non-vibration condition, the material damage and dust raising risk is reduced, and the sampling efficiency and consistency are improved.

Description

Technical Field

[0001] This invention relates to the field of material separation and sampling equipment technology, specifically to a sampling mechanism and method for stacked materials (especially PP layers and copper foil layers in printed circuit board manufacturing). Background Technology

[0002] In various industrial manufacturing processes, thin-layer materials such as sheets, films, foils, resin films, or fiber-reinforced materials often need to be stacked, laminated, pressed, coated, or wound. During handling, transfer, sampling, or quality inspection, one or more layers of material are separated from the laminate for observation, testing, or process adjustment. These processes are widely used in applications such as electronics and packaging manufacturing, thin-film composite processing, roll-to-roll production, and material slitting and lamination, and have typical "pressing, suction, winding, and unwinding" operation characteristics.

[0003] In actual operation, interlayer bonding forces often exist between stacked materials due to factors such as surface adhesion, material adhesion itself, vacuum adsorption residue, and electrostatic adsorption. When using adsorption methods such as vacuum suction cups to grasp single-layer target materials, a "stuck / layer-carried" phenomenon often occurs, where adjacent layers are pulled up together. This leads to separation failure, material wrinkling, edge tearing, and localized residual adhesion, resulting in downtime, scrap, or quality abnormalities in subsequent processes. Especially under conditions of fluctuating environmental humidity, material surface friction, peeling, and adsorption, materials easily accumulate electrostatic charges. Electrostatic adsorption further enhances interlayer adhesion and makes the stuck phenomenon more prominent, thus creating risks of unstable grasping, misgrabbing, and repeated rework.

[0004] To suppress entrainment and achieve interlayer separation, existing methods often employ vertical suction combined with vibration, shaking, or external prying to disrupt interlayer adhesion using inertial or impact forces. However, the force and location of vibration or prying are difficult to control precisely, and under high-frequency contact and friction conditions, they can easily cause surface scratches, edge damage, or internal structural damage to the material, potentially inducing dust / particle generation. For fiber-reinforced or surface-sensitive materials, these methods are even more prone to structural damage and contamination risks. Furthermore, the electrostatic adsorption strength is significantly affected by material condition, operating conditions, and environmental conditions, making it difficult to guarantee the success rate and consistency of vibration-based separation, and thus failing to meet the requirements of automated production lines for stable cycle time, controllable separation, and low-pollution operation.

[0005] Therefore, there is an urgent need in this field for a separation and sampling technology for stacked materials that can achieve flexible, controllable, efficient and non-destructive interlayer separation and sampling under non-vibration or low-disturbance conditions to address the entrainment problems caused by electrostatic adsorption, vacuum residual adsorption and surface adhesion, thereby reducing the risk of mis-grabbing and material damage and improving process consistency. Summary of the Invention

[0006] The primary objective of this invention is to provide a sampling mechanism for stacked materials to solve the problems of traditional vibration separation methods, which easily cause material damage, generate dust, and have low control accuracy.

[0007] Another objective of this invention is to provide a sampling method using the above-mentioned sampling mechanism to achieve efficient and non-destructive interlayer separation.

[0008] To achieve the above objectives, the present invention adopts the following technical solution:

[0009] A sampling mechanism for a stack of laminated materials, wherein the laminated materials include material layers, and the materials of the material layers are not limited to: semi-cured insulating PP layer (hereinafter referred to as PP layer), copper foil layer (hereinafter referred to as CF layer), and other various thin plates, films, or sheets; the above materials can be used alone or in combination to constitute the stacked material. The sampling mechanism and sampling method are applicable to separating and removing single or multiple material layers from the stacked material, but are not limited thereto, including:

[0010] frame;

[0011] Two rows of symmetrically arranged suction devices on the frame are used to adsorb and sample the target material layer from both sides along the length of the material layer.

[0012] Each row of suction devices includes multiple suction cups spaced apart along the length of the material layer and a drive shaft. The multiple suction cups are mounted on the drive shaft and can move synchronously under the drive shaft.

[0013] The drive shaft is configured such that after the suction cup picks up the material layer, it tilts outward at a predetermined angle around an axis parallel to the length direction of the material layer, so that the material layer forms a controllable tension / bending state in the width direction, thereby weakening the adhesion between adjacent layers and the target material layer and forming an interlayer peeling tendency.

[0014] The suction device is further configured to perform a horizontal retraction motion along the axial direction of the drive shaft when the material layer is in the tension / bending state, so as to apply a relative displacement along the length direction to the material layer, thereby releasing the tension state and forming a peeling process between the layers, thereby realizing the separation of the material layer from the adjacent layers.

[0015] Preferably, the predetermined angle is one that can effectively form the tension / bending state while avoiding damage to the material layer. Further, the predetermined angle is between 10° and 60°; even further, the predetermined angle is 30°.

[0016] Preferably, the suction device is provided with an angle limiting block on its side, and the angle limiting block is configured to correspond to the tilting stroke of the drive shaft, so as to limit the predetermined angle within a range that will not cause damage to the material layer.

[0017] Preferably, the sampling mechanism further includes a pressing device disposed between the two rows of suction devices. The pressing device can move downward to abut against the middle of the material layer being suctioned, suppressing the upward arching or wrinkling of the middle, so that the middle and the sides remain relatively smooth. The pressing device may include at least one independently retractable suction head or contact head.

[0018] Preferably, the sampling mechanism further includes edge separation components symmetrically arranged at both ends of the lower part of the sampling mechanism. Each edge separation component includes a bracket and a support member movably arranged on the bracket. The support member can extend toward the width edge of the material layer to provide support and assist in guiding / exporting the edge portion when the material layer peels off from the adjacent layer, thereby promoting the separation of adjacent layers.

[0019] Preferably, the spacing between the two rows of suction devices is set on the frame in an adjustable manner, and the spacing is adjusted and fixed by a drive screw and a locking member.

[0020] Preferably, the suction cup is made of a flexible elastic material, such as silicone or rubber, to form a flexible contact when adsorbing the material layer and reduce the risk of indentation or tearing.

[0021] Based on the same inventive concept, the present invention also provides a sampling method for a stack of layered materials, employing the sampling mechanism described above, and including the following steps:

[0022] S1: Positioning and adsorption, drive the two rows of suction devices to approach and align with the target material layer, and perform vacuum adsorption through the suction cups at both edges along the length of the target material layer, so that the target material layer forms a stable clamping and adsorption state on both sides.

[0023] S2: Controlled tension. Under the condition of maintaining vacuum adsorption, the drive shaft is controlled to rotate, causing the suction cup to tilt outward to a predetermined angle around an axis parallel to the length direction of the target material layer, so that the target material layer forms a controlled tension / bending state in the width direction, thereby reducing the adhesion between the target material layer and the adjacent layer below and inducing interlayer peeling.

[0024] S3: Retraction and Peeling. While the target material layer is maintaining the tension / bending state or during its release, the entire suction device is controlled to perform a horizontal retraction movement along the axial direction of the drive shaft, causing the target material layer to generate a relative displacement along the length direction relative to the adjacent layer below and releasing the tension, thereby forming a peeling process between the layers and realizing the separation of the target material layer from the adjacent layer below.

[0025] The beneficial effects of this invention are as follows:

[0026] Compared with the prior art, the present invention has the following significant advantages:

[0027] 1. Non-vibration separation, reduced damage and dust: This invention uses two rows of symmetrical suction devices to vacuum adsorb both sides of the target material layer, and coordinates with the outward tilt of the drive shaft to form controlled tension bending, and then achieves peeling and separation by axial horizontal retraction. It does not rely on vertical vibration or forced prying, thereby reducing the risk of tearing, creases and breakage of the material layer, while reducing the generation of debris and dust.

[0028] 2. Controllable separation mechanism and higher success rate: The drive shaft makes the target material layer form a controllable tension bending state at a predetermined angle, which can effectively weaken the adhesion between the target material layer and the adjacent layers and form a clear interlayer peeling trend; then the axial retraction causes the interlayer to generate relative displacement along the length direction and releases the tension, making the peeling process more continuous and repeatable, thereby improving the stability of interlayer separation and the success rate of one-time separation.

[0029] 3. Angle limit to prevent over-bending and protect the integrity of the material layer: An angle limit block is set to limit the tilt stroke of the drive shaft, so that the predetermined angle is limited to a range that will not cause damage to the material layer, avoiding micro-cracks, whitening or permanent deformation caused by excessive bending, and improving the controllability and consistency of the process window.

[0030] 4. Middle-section pressure suppresses wrinkles and improves peeling uniformity: A pressure device is set between the two rows of suction devices to apply downward pressure to the middle of the material layer, suppressing the upward arching, wrinkles or "wind-catching" effect in the middle, so that the middle and the sides remain relatively smooth, thereby making the stress more uniform and the peeling interface more stable during the tensioning, bending and retraction peeling process.

[0031] 5. Edge support for introduction and reduction of edge layering and curling: Edge separation components are set at both ends of the lower part of the sampling mechanism. When peeling occurs, they provide support for the edge of the material layer width and assist in introduction / extraction. This can reduce the risk of "layering", "tearing" or curling caused by local adhesion at the edge, and further improve the separation quality and the consistency of the finished product appearance.

[0032] 6. High adaptability and easy changeover adjustment: The spacing between the two rows of suction devices is adjustable and can be adjusted and fixed by drive screws and locking parts. It can quickly adapt to material stacks of different specifications and widths, reduce changeover time, and improve equipment versatility and production line flexibility.

[0033] 7. Flexible suction cups provide friendly contact and reduce indentations and scratches: The suction cups are made of flexible elastic materials such as silicone or rubber, which form flexible contact when adsorbing material layers. This reduces the probability of local indentations, scratches and surface abrasions, and helps to improve adsorption stability and repeatability accuracy.

[0034] 8. The process can be modularly integrated and is conducive to automated control: The adsorption, tilting, limiting, pressing, edge support and axial retraction actions can all be realized by corresponding mechanisms and drives, which facilitates the formation of standardized action sequences and linkage with the upper control system, thereby reducing human dependence and improving automated sampling efficiency and process consistency. Attached Figure Description

[0035] Figure 1 This is a three-dimensional structural schematic diagram of a sampling mechanism according to an embodiment of the present invention.

[0036] Figure 2 This is a three-dimensional structural schematic diagram of a sampling mechanism according to an embodiment of the present invention.

[0037] Figure 3 yes Figure 1 The illustrated embodiment is a side view of the suction cup in a tilted and tensioned state.

[0038] Figure 4 This is a flowchart of an embodiment of the sampling method of the present invention.

[0039] Explanation of main component symbols

[0040] Frame 10; Guide rail 101;

[0041] Suction device 20; drive shaft 201; suction cup 202; angle limiting block 203;

[0042] Pressing device 30;

[0043] Edge separation component 40; bracket 401; support member 402;

[0044] Adjustment mechanism 50; drive screw 501; locking wrench 502;

[0045] The following detailed description, in conjunction with the accompanying drawings, will further illustrate the present invention. Detailed Implementation

[0046] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. Example 1:

[0047] refer to Figure 1-3 This embodiment provides a sampling mechanism for a stack of laminated materials, which is mainly used in the PCB manufacturing process to non-destructively separate a single target material layer from a tightly bonded stack.

[0048] Traditional methods typically rely on vibration separation or manual prying to break the interlayer adhesion, which can easily cause material damage and generate debris and dust. This application achieves controllable separation under non-vibration conditions through a combination of symmetrical adsorption, controlled tension bending, and horizontal retraction peeling, solving the problems of low efficiency, damage, and high dust risk.

[0049] like Figure 1-3 As shown, the sampling mechanism includes a robust frame 10, which provides a mounting base and guidance for all moving parts.

[0050] In traditional solutions, insufficient rigidity of the machine body or inconsistent installation benchmarks can easily cause motion misalignment and adsorption position drift. This application provides a unified assembly benchmark and guiding foundation through the frame 10, which solves the problems of poor motion consistency and unstable repeatability.

[0051] Two rows of suction devices 20 are arranged in parallel on the frame 10, symmetrically about the center of the mechanism, and their symmetrical plane coincides with the center line of the width of the target material layer.

[0052] Each row of suction devices 20 is mounted on the linear guide rail 101 of the frame 10 via a slider, so that the entire row of suction devices 20 can perform precise horizontal reciprocating motion along the direction of the guide rail 101. The guide rail 101 / slider constitutes the basis for the execution of the "horizontal retraction motion". The direction of the guide rail 101 can be set as the axial direction of the drive shaft 201 (or it can be understood as the retraction direction consistent with the length direction of the material layer).

[0053] Traditional solutions lack grouped linear guides, leading to unstable retraction / displacement and random peeling trajectories. This application achieves high-precision reciprocating retraction of the entire row of suction devices 20 through linear guide rails 101 and sliders, solving the problems of uncontrollable peeling process and poor separation consistency.

[0054] Each row of suction devices 20 includes a drive shaft 201 and multiple suction cups 202:

[0055] The drive shaft 201 is driven by a servo motor via a reducer, and its axis is parallel to the length direction of the target material layer.

[0056] The suction cups 202 are arranged at equal intervals along the length of the target material layer; in one embodiment, multiple suction cups 202 are arranged in each row with the adsorption surface facing down, and are connected to a vacuum generation system through an internal air passage to achieve vacuum adsorption.

[0057] The suction cup 202 is preferably made of flexible silicone to form a uniform and flexible seal with the surface of the material layer and reduce the risk of indentation.

[0058] Traditional solutions often result in uneven adsorption, indentations, or tears due to insufficient adsorption points or excessively rigid adsorption contacts. This application addresses these issues by using multiple equally spaced suction cups 202 and flexible materials for adsorption, thereby improving adsorption stability.

[0059] Angle limit block 203 is located next to the rotating bracket of drive shaft 201 to mechanically limit the stroke of drive shaft 201 driving suction cup 202 to rotate outward, thereby constraining the "predetermined angle" within a safe range (e.g., hardware upper limit ±60°) to avoid excessive tilting and damage to the material layer.

[0060] Another set of instructions also clearly states that the suction cup 202 group is equipped with a "suction cup 202 angle limiting block 203" to ensure that the bending degree of the shelf is within a certain range and will not cause damage.

[0061] Traditional solutions rely on experience to set the bending radius, which can easily lead to over-bending causing material damage or under-bending causing insufficient peeling. This application solves the problems of uncontrollable bending degree and poor process consistency by using angle limiting block 203 to hard limit the tilting stroke.

[0062] A pressing device 30 is provided between the two rows of suction devices 20. The pressing device 30 includes a vertically lifting mounting plate that can be driven by a cylinder or an electric cylinder, and two independent retractable suction heads mounted on the mounting plate; the suction heads are also connected to a vacuum, and their extension stroke and descent position can be independently controlled, which are used to press down and adsorb the middle of the material layer during the separation process to suppress arching or wrinkling.

[0063] Traditional methods rely solely on adsorption from both sides, which can easily lead to relaxation, bulging, and wrinkling in the middle, resulting in instability or even delamination at the peeling front. This application solves the problems of uncontrolled deformation and uneven peeling in the middle by using a pressing device 30 to flatten and constrain the middle and assist in adsorption.

[0064] Edge separation components 40 are symmetrically arranged at both ends below the working area of ​​the sampling mechanism. Each edge separation component 40 includes a bracket 401 and a horizontally telescopic support 402; the support 402 can be driven by a small linear cylinder to extend and retract in the horizontal direction (perpendicular to the length direction of the material layer), and its end can be provided with a smooth roller or a low-friction material abutment block to support and guide the edge during the peeling process.

[0065] In addition, the action description also gives the action logic of "the shelf partition / bracket moves inward to effectively isolate and lift". In this embodiment, the "partition / bracket" can be used as a specific structural form or cooperating component of the support member 402, which is used to insert into the interlayer after lifting and to achieve isolation and lifting.

[0066] In traditional solutions, edge adhesion is the most difficult to break, and it is easy to cause "layering", "tearing" or edge curling. This application solves the problems of unstable edge peeling and edge defects by supporting and guiding the support member 402 and separating and lifting it in coordination.

[0067] The adjustment mechanism 50 for adjusting the distance between the two rows of suction devices 20 includes a drive screw 501 and a mating nut (connected to the mounting base of the suction device 20). Rotating the drive screw 501 can synchronously drive the two rows of suction devices 20 to move towards or away from each other. After adjustment, the device is locked in place by a locking wrench 502 (or other quick locking mechanism).

[0068] The instructions also mention that the position of the 202 suction cups can be adjusted by turning the screws by hand.

[0069] Traditional solutions require repeated disassembly and realignment for model changes, resulting in low efficiency and poor consistency. This application achieves rapid pitch adjustment through lead screw adjustment and locking, solving the problems of difficulty in adapting different material specifications and easy drifting after pitch adjustment.

[0070] like Figure 4 As shown, this embodiment performs sampling separation based on the above-mentioned sampling mechanism, preferably including the following steps:

[0071] S1: Positioning and adsorption:

[0072] The sampling mechanism is moved above the stacked body, and the two rows of suction cups 202 are aligned with the edge areas on both sides of the target material layer in the length direction (e.g., non-functional areas 5-15mm away from the edge) by visual or mechanical positioning. Then, the suction cups 202 and the suction head of the pressing device 30 simultaneously start vacuum and firmly adsorb the target material layer. At this time, the support 402 is in the retracted state.

[0073] Alternatively, in terms of equipment operation, the extraction unit can be lowered to the suction cup 202 to lightly press the plate before starting the vacuum, in order to improve the reliability of initial bonding and adsorption.

[0074] In traditional methods, positioning deviations or insufficient adsorption contact can easily lead to unstable adsorption and retraction slippage. This application solves the problems of unstable adsorption boundary conditions and desorption / shifting during separation by using symmetrical multi-point adsorption combined with adsorption assistance from a central adsorption head.

[0075] S2: Controlled tension bending:

[0076] While maintaining vacuum adsorption force, the two rows of drive shafts 201 are controlled to rotate outward synchronously, so that the suction cup 202 tilts outward to a predetermined angle around an axis parallel to the length direction of the material layer; it has been verified that the predetermined angle can work effectively in the range of 10° to 60°, preferably 30°.

[0077] The tilting action lifts the edges of the target material layer, thereby generating controllable and uniform elastic tension and slight bending in the width direction. This "tension and bending state" can significantly weaken the physical adhesion and electrostatic adsorption between the target material layer and the adjacent layer below, and induce a microscopic separation tendency between the layers.

[0078] (Synonymous Action Mapping) The action description mentions that the "suction cup 202 group of rotary motors" and the "suction cup 202 group of lateral movement control motors" can work together to make the left and right ends of the shelf be attracted and bent, so as to eliminate the second layer of adsorption; this collaboration can correspond to the combined mechanism of "outward tilting to form tension bending + horizontal retraction to push peeling" in this invention.

[0079] Traditional methods rely on vibration to break the adhesion, resulting in random peeling initiation and potential dust and material fatigue. This application addresses the issues of uncontrollable peeling initiation and vibration side effects by establishing a stable peeling trend through controlled tension bending at a predetermined angle.

[0080] S3: Assisted flattening and edge preparation (optional but preferred):

[0081] Simultaneously or after S2, the two retractable adsorption heads of the pressing device 30 descend, gently touching and adsorbing the middle of the target material layer to suppress central relaxation, arching, or wrinkling, ensuring that the target material layer remains in a relatively smooth and controlled state during the separation process and avoiding stress concentration.

[0082] Meanwhile, the support member 402 of the edge separation component 40 extends horizontally inward to below the target material layer near the edge, forming an initial physical gap and providing edge guidance, creating conditions for subsequent peeling expansion.

[0083] In traditional solutions, central bulging and edge adhesion can lead to discontinuous peeling front, layering, or tearing. This application solves the problems of uneven peeling and high incidence of edge defects by combining central flatness constraint and edge support guidance.

[0084] S4: Horizontal retraction and peeling (corresponding to "axial horizontal retraction to release tension"):

[0085] After the tensioned bending state is established and stabilized, the two rows of suction devices 20 are driven to synchronously and quickly perform short-stroke horizontal retraction along the axis of the drive shaft 201. The retraction amount can be adjusted according to the material, for example, 5-20mm.

[0086] The retraction causes the target material layer to undergo a relative displacement along the length direction relative to the stationary adjacent layer below, and rapidly releases the width-direction tension stress established by S2; under the combined action of elastic restoring force and shear displacement, peeling starts from both sides and extends to the entire width, achieving a complete and clean separation of the target material layer from the adjacent layer below; the support member 402 plays a guiding and supporting role for the peeling front at this stage.

[0087] Traditional peeling propulsion relies on random vibration expansion, which easily leads to localized residual adhesion and layering. This application solves the problems of discontinuous peeling propulsion and unstable separation quality by introducing controllable relative displacement and releasing tension stress through horizontal retraction.

[0088] S5: Transfer and Reset:

[0089] After separation, the target material layer is transferred to the designated work station or receiving position; then the vacuum is released and each component is driven to reset, including the drive shaft 201 rotating to the zero position, the suction device 20 resetting horizontally, the pressing device 30 being lifted and reset, and the support 402 retracting, so as to enter the next cycle.

[0090] The optional action description also describes a loop of "moving to the top, then moving to the next workstation and lowering in the reverse order", which can be used as a way to implement production line networking.

[0091] In traditional solutions, non-standard action chains lead to large fluctuations in cycle time and incomplete resets, causing malfunctions in the next cycle. This application solves the problems of unstable cycle time and insufficient reliability of continuous operation by adopting a standardized cycle of "transfer - vacuum release - sequential reset of each component".

[0092] Although this application discloses several aspects and embodiments, other aspects and embodiments will be obvious to those skilled in the art. Various modifications and improvements can be made without departing from the concept of this application, and these all fall within the scope of protection of this application. The various aspects and embodiments disclosed in this application are for illustrative purposes only and are not intended to limit this application. The actual scope of protection of this application is determined by the claims.

Claims

1. A sampling mechanism for a stack of laminated materials, the laminated material comprising material layers, characterized in that, include: frame; Two rows of symmetrically arranged suction devices on the frame are used to adsorb and sample the target material layer from both sides along the length of the material layer. Each row of suction devices includes multiple suction cups spaced apart along the length of the material layer and a drive shaft. The multiple suction cups are mounted on the drive shaft and can move synchronously under the drive shaft. The drive shaft is configured such that after the suction cup picks up the target material layer, it tilts outward at a predetermined angle around an axis parallel to the length direction of the target material layer, so that the target material layer forms a controllable tension bending state in the width direction, thereby weakening the adhesion between the adjacent layers and the target material layer and forming an interlayer peeling tendency. The suction device is further configured to perform a horizontal retraction motion along the axial direction of the drive shaft when the target material layer is in the tensioned bending state, so as to apply a relative displacement along the length direction to the target material layer, thereby releasing the tensioned bending state and forming a peeling process between the layers, thereby achieving the separation of the target material layer from the adjacent layer.

2. The sampling mechanism for a stack of laminated materials according to claim 1, characterized in that, The predetermined angle is the angle that can effectively form the tensioned bending state and avoid damage to the material layer.

3. The sampling mechanism for a stack of laminated materials according to claim 2, characterized in that, The predetermined angle is between 10° and 60°.

4. The sampling mechanism for a stack of laminated materials according to claim 3, characterized in that, The predetermined angle is 30°.

5. The sampling mechanism for a stack of laminated materials according to claim 1, characterized in that, The suction device is provided with an angle limiting block on its side. The angle limiting block is configured to correspond to the tilting stroke of the drive shaft and is used to limit the predetermined angle within a range that will not cause damage to the material layer.

6. The sampling mechanism for a stack of laminated materials according to claim 1, characterized in that, The sampling mechanism also includes a pressing device located between the two rows of suction devices. The pressing device can move downward to abut against the middle of the target material layer being suctioned, suppressing the upward arching or wrinkling of the middle, so that the middle and the sides remain relatively smooth. The pressing device includes at least one independently extendable suction head or contact head.

7. The sampling mechanism for a stack of laminated materials according to claim 1, characterized in that, The sampling mechanism also includes edge separation components symmetrically arranged at both ends of the lower part of the sampling mechanism. Each edge separation component includes a bracket and a support member movably disposed on the bracket. The support member can extend toward the width edge of the target material layer to provide support and assist in guiding and / or guiding the edge portion when the target material layer peels off from the adjacent layer, thereby promoting the separation of adjacent layers.

8. The sampling mechanism for a stack of laminated materials according to claim 1, characterized in that, The spacing between the two rows of suction devices is adjustable on the frame, and the spacing is adjusted and fixed by a drive screw and a locking component.

9. The sampling mechanism for a stack of laminated materials according to claim 1, characterized in that, The suction cup is made of a flexible elastic material, such as silicone or rubber, to form a flexible contact when adsorbing the material layer and reduce the risk of indentation or tearing.

10. A sampling method for a stack of layered materials, characterized in that, The sampling mechanism described in any one of claims 1 to 9 includes the following steps: S1: Positioning and adsorption, driving the two rows of suction devices to approach and align with the target material layer, adsorbing the target material layer at both edges along the length direction using the suction cups, so that the target material layer forms a stable clamping and adsorption state on both sides. S2: Controlled tension. While maintaining adsorption, the drive shaft is controlled to rotate, causing the suction cup to tilt outward around an axis parallel to the length direction of the target material layer to the predetermined angle, so that the target material layer forms a controlled tension bending state in the width direction, thereby reducing the adhesion between the target material layer and the adjacent layer below and inducing interlayer peeling. S3: Retraction and peeling. During the process of maintaining the tensioned bending state or releasing the target material layer, the entire suction device is controlled to perform a horizontal retraction movement along the axial direction of the drive shaft, so that the target material layer generates a relative displacement along the length direction relative to the adjacent layer below and releases the tensioned bending state, thereby forming a peeling process between the layers and realizing the separation of the target material layer from the adjacent layer below.

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