An apparatus for trimming a rubber article

Abstract

The utility model discloses a device for cutting rubber product, including cutting upper template and cutting lower template, cutting upper template and cutting lower template are set up to the upper and lower buckling, and both right -hand ends are hinged through the hinge chain, the inside of cutting upper template and cutting lower template all are equipped with the cutting chamber, the inside uniform equidistance of cutting chamber is equipped with rubber product cutting template, and the top of rubber product cutting template is equipped with the cutting mouth that penetrates, the setting of this device for cutting rubber product, the structure design is reasonable, in the device, rubber product cutting template is assembled in the adjusting groove through the pivot and the axle cylinder, and the ball of axle cylinder outer wall is arranged in the balance groove, so that rubber product cutting template can slide easily and adjust the position in the cutting chamber, greatly reduce the friction resistance in the adjusting process, and the operation is labor saving and smooth.

Description

Technical Field

[0001] This utility model relates to the field of rubber product cutting technology, specifically to a device for cutting rubber products. Background Technology

[0002] In the production and processing of rubber products, cutting is a crucial step, and the performance of the cutting device directly affects the processing accuracy and production efficiency. In existing technologies, traditional rubber product cutting devices typically employ a fixed template structure. The position of the cutting template is inconvenient to adjust, making it difficult to adapt to the cutting needs of rubber products of different specifications and sizes. When different types of rubber products need to be cut, the entire template often needs to be replaced, which is cumbersome and time-consuming, severely impacting production efficiency.

[0003] Meanwhile, the positioning accuracy of the templates in traditional cutting devices is insufficient, making them prone to wobbling or displacement during the cutting process. This results in significant dimensional errors in the cut rubber products and inconsistent product quality. Furthermore, the interlocking connection between the upper and lower templates often uses simple snap-fit ​​or bolt connections. Snap-fit ​​connections may be unstable, while bolt connections require tools for assembly and disassembly, which is inconvenient and increases the labor intensity for workers. Moreover, the existing devices suffer from high frictional resistance during template adjustment, leading to strenuous operation and severe template wear, thus shortening the device's lifespan. Therefore, there is an urgent need for a rubber product cutting device that allows for easy template adjustment, accurate positioning, convenient operation, and high stability. Summary of the Invention

[0004] The purpose of this invention is to provide a device for cutting rubber products, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a device for cutting rubber products, comprising an upper cutting template and a lower cutting template, wherein the upper cutting template and the lower cutting template are interlocked vertically, and their right ends are hinged together by a hinge chain; both the upper cutting template and the lower cutting template have cutting cavities inside, and rubber product cutting templates are uniformly and equidistantly assembled inside the cutting cavities, with a cutting opening through the top of each rubber product cutting template; adjustment grooves are provided on the left and right inner walls of the cutting cavities, and rotating shafts are installed at both ends of each rubber product cutting template, with shaft sleeves installed at the ends of the rotating shafts, and the shaft sleeves are assembled in the adjustment grooves; positioning grooves are uniformly and equidistantly provided on the upper end of the upper cutting template on both sides of the cutting cavity, and positioning plates are installed on both sides of the top of each rubber product cutting template, with the positioning plates embedded in the positioning grooves.

[0006] As a preferred embodiment of the present invention for cutting rubber products, the outer wall of the shaft cylinder is provided with rotating cavities evenly spaced along its axis, and ball bearings are installed inside the rotating cavities. The upper and lower inner walls of the adjusting groove are provided with balancing grooves, and the ball bearings are disposed in the balancing grooves.

[0007] As a preferred embodiment of the device for cutting rubber products according to this utility model, the inner cavity of the shaft cylinder is provided with a mating opening, and the rotating shaft is disposed within the mating opening.

[0008] As a preferred embodiment of the device for cutting rubber products according to this utility model, the positioning plate and the positioning groove are connected by a mortise and tenon structure.

[0009] As a preferred embodiment of the device for cutting rubber products according to this utility model, an operating plate a is installed at the center of the side wall of the upper cutting template, and an operating plate b is installed at the center of the side wall of the lower cutting template. The operating plates a and b are connected by a snap-fit ​​structure.

[0010] As a preferred embodiment of the device for cutting rubber products according to this utility model, the snap-fit ​​structure includes a snap-fit ​​block installed at the bottom of the operating plate a and a snap-fit ​​groove opened at the top of the operating plate b. The snap-fit ​​block snaps into the snap-fit ​​groove. Both outer walls of the snap-fit ​​block have inclined convex surfaces, and both inner walls of the snap-fit ​​groove have inclined concave surfaces. The inclined convex surfaces and inclined concave surfaces cooperate with each other.

[0011] As a preferred embodiment of the device for cutting rubber products according to this utility model, the internal part of the clamping block is provided with an elastic element, and the end of the clamping block is provided with a rounded corner.

[0012] In a preferred embodiment of this invention, the side walls of both operating plate a and operating plate b are provided with snap-fit ​​grooves. In this device, the rubber product cutting template is assembled in the adjusting groove via a rotating shaft and a shaft cylinder. The ball bearings on the outer wall of the shaft cylinder are positioned in a balancing groove, allowing the rubber product cutting template to easily slide and adjust its position within the cutting cavity. This significantly reduces frictional resistance during adjustment, making operation easier and smoother, and improving adjustment efficiency. Simultaneously, the positioning plate and positioning groove employ a mortise and tenon structure, enabling precise positioning of the rubber product cutting template and preventing template displacement during cutting, thus ensuring cutting accuracy and improving the quality stability of the rubber products.

[0013] The upper and lower cutting templates are engaged via a snap-fit ​​mechanism on operating plates a and b. The convex surface of the snap-fit ​​block matches the concave surface of the snap-fit ​​groove, ensuring a smoother and more stable engagement process and effectively preventing misalignment of the upper and lower templates during cutting. The elastic elements inside the snap-fit ​​block and the rounded corners at the ends further enhance the reliability and ease of operation of the snap-fit ​​mechanism. The upper and lower templates can be quickly engaged and disengaged without tools, reducing worker fatigue and increasing production efficiency. Attached Figure Description

[0014] Figure 1 This is a front-view three-dimensional structural schematic diagram of the present invention;

[0015] Figure 2 This is a schematic diagram of part A of the present utility model;

[0016] Figure 3 This is a schematic diagram of the shaft cylinder of this utility model;

[0017] Figure 4 This is a schematic diagram of the snap-fit ​​structure of this utility model.

[0018] In the diagram: 1. Upper cutting mold; 2. Lower cutting mold; 3. Rubber product cutting template; 4. Cutting opening; 5. Cutting cavity; 6. Operation panel a; 7. Operation panel b; 8. Clip groove; 9. Positioning plate; 10. Positioning groove; 11. Balance groove; 12. Adjustment groove; 13. Rotating shaft; 14. Shaft cylinder; 15. Mating opening; 16. Rotating cavity; 17. Ball bearing; 18. Locking block; 19. Locking groove; 20. Elastic element; 21. Rounded corner; 22. Angled convex surface; 23. Angled concave surface. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Please see Figure 1-4 This utility model provides a technical solution:

[0021] In this technical solution, a device for cutting rubber products includes an upper cutting template 1 and a lower cutting template 2, which are snapped together vertically and hinged at their right ends by a hinge chain. Both the upper and lower cutting templates 1 and 2 have cutting cavities 5 inside, and rubber product cutting templates 3 are evenly and equidistantly assembled inside the cutting cavities 5. A cutting opening 4 is provided at the top of each rubber product cutting template 3. Adjustment grooves 12 are provided on the left and right inner walls of the cutting cavities 5. A rotating shaft 13 is installed at both ends of each rubber product cutting template 3, and a shaft sleeve 14 is installed at the end of each rotating shaft 13, which is fitted into the adjustment groove 12. Positioning grooves 10 are evenly and equidistantly provided on the upper end of the upper cutting template 1 on both sides of the cutting cavity 5. Positioning plates 9 are installed on both sides of the top of each rubber product cutting template 3, and the positioning plates 9 are embedded in the positioning grooves 10.

[0022] The upper template 1 and lower template 2 are made of 18mm thick Q345B low alloy high strength steel, with a 50μm thick polytetrafluoroethylene coating on the surface. The friction coefficient is ≤0.15, which reduces friction loss when the templates are closed.

[0023] The hinge chain is made of 304 stainless steel, with a hinge shaft diameter of φ10mm. It is equipped with a double-row radial ball bearing (model 6201) to achieve a 180° opening angle, a load capacity of ≥200kg, and a rotational torque of ≤1.2N・m (no load).

[0024] Adjustable dampers (such as torque springs) at the hinges are used to ensure that the template closing speed is ≤0.5m / s, thus avoiding impact vibration caused by rapid closing.

[0025] The internal dimensions of the cutting cavity 5 are 500mm long × 200mm wide × 60mm deep (customizable upon request), with an inner wall roughness Ra≤1.6μm to ensure smooth template sliding. The rubber product cutting template 3 is made of Cr12MoV mold steel, quenched and tempered to a hardness of HRC58-62, with a template thickness of 25mm. The spacing between adjacent templates can be adjusted within the range of 30-80mm (adjustment accuracy ±1mm).

[0026] The cutting edge 4 adopts a stepped blade design, with the first-level cutting blade angle of 30° and the second-level finishing blade angle of 15°, with a cutting accuracy of ±0.1mm, suitable for rubber products with a thickness of ≤15mm;

[0027] A 30° inclined waste guide channel (50mm wide) is opened at the bottom of the cutting cavity, which is matched with a detachable waste box (capacity ≥1L);

[0028] The adjusting groove 12 is a T-shaped groove structure with a groove width of 20mm, a groove depth of 15mm, and a length equal to that of the cutting cavity (500mm). The straightness error of the groove body is ≤0.02mm / m.

[0029] The rotating shaft 13 and the shaft cylinder 14 are interference-fitted (fit tolerance H7 / s6). The rotating shaft has a diameter of φ12mm, the shaft cylinder has an outer diameter of φ20mm, and a length of 30mm. The material is 40Cr with heat treatment (hardness HB220-250). The clearance between the shaft cylinder 14 and the adjusting groove 12 is ≤0.05mm, ensuring that the lateral movement resistance of the template is ≤10N (unloaded state).

[0030] Limiting blocks (made of nylon 66, Shore D75 hardness) are installed at both ends of the adjustment groove, with a limiting error of ±0.5mm;

[0031] The positioning groove 10 is a rectangular groove with a width of 15mm and a depth of 12mm. It is evenly distributed along the length of the cutting cavity (50mm spacing), and the verticality error of the groove is ≤0.03mm.

[0032] The positioning plate 9 adopts an L-shaped structure with a vertical section height of 15mm and a horizontal section width of 10mm, forming a transition fit with the positioning groove (tolerance H8 / js7). After positioning, the vertical wobble of the template is ≤0.08mm.

[0033] A 45° guide chamfer (chamfer size C2mm) is set at the edge of the positioning plate / groove to improve assembly efficiency.

[0034] In some technical solutions, the outer wall of the shaft cylinder 14 is provided with rotating cavities 16 evenly spaced along its axis, and ball bearings 17 are installed inside the rotating cavities 16. The upper and lower inner walls of the adjusting groove 12 are provided with balancing grooves 11, and the ball bearings 17 are set in the balancing grooves 11.

[0035] Eight rotating cavities 16 are evenly distributed along the circumference of the shaft (with an included angle of 45°), with a cavity diameter of φ8mm, a depth of 6mm, and an inner wall roughness Ra≤0.8μm to ensure smooth ball rotation. The balls 17 are made of G5 grade precision steel balls according to GB / T308.1 standard, with a diameter of φ6mm, a roundness error ≤0.001mm, a hardness of HRC60-64, and a single ball bearing capacity ≥50N.

[0036] The balance groove 11 is a semi-circular arc groove (radius 3.5mm), with a groove width of 7mm and a depth of 4mm. It forms a point contact rolling pair with the ball, with a friction coefficient ≤0.012, reducing resistance by 80% compared to traditional sliding structures.

[0037] A stainless steel retaining ring with a diameter of φ7mm (thickness of 1mm) is installed at the opening of the rotating cavity and fixed by interference fit (interference amount of 0.02mm).

[0038] In some technical solutions, the shaft sleeve 14 has a mating port 15 installed inside, and the rotating shaft 13 is set inside the mating port 15.

[0039] The fitting port 15 is a blind hole structure with a diameter of φ12.05mm (interference fit with the rotating shaft, interference amount 0.03-0.05mm) and a depth of 20mm. Two φ3mm lubrication injection holes (evenly distributed at 180° intervals) are opened at the bottom of the hole.

[0040] A φ14mm limiting boss (2mm high) is machined at the end of the rotating shaft 13, with a fitting clearance of ≤0.1mm between it and the end face of the shaft cylinder to prevent axial movement.

[0041] An M8 threaded hole is machined at the end of the shaft, and a set screw (15mm in length) is used to fix the position of the shaft sleeve to prevent loosening after long-term use.

[0042] In some technical solutions, the positioning plate 9 and the positioning groove 10 are connected by a mortise and tenon structure.

[0043] The dovetail tenon structure is adopted. The positioning plate (tenon) dimensions are: width 14mm, height 12mm, tenon inclination angle 12°; the positioning groove (tenon groove) dimensions are: groove width 16mm, groove depth 14mm, groove bottom width 12mm, forming a wedge tight fit (fitting gap ≤0.04mm).

[0044] The surface of the mortise and tenon structure is blackened, the coefficient of friction is ≤0.25, and a single set of mortise and tenon can bear a lateral tensile force ≥50N and a vertical compressive force ≥100N.

[0045] A spring pin (φ4mm in diameter, 5-8N spring force) is added to the side of the tenon and inserted into the positioning hole (5mm deep) on the side of the mortise to prevent the template from accidentally falling off. In some technical solutions, an operating plate a6 is installed at the center of the side wall of the upper cutting template 1, and an operating plate b7 is installed at the center of the side wall of the lower cutting template 2. The operating plates a6 and b7 are connected by a snap-fit ​​structure.

[0046] The operation panel a6 / b (7) is made of 6061-T6 aluminum alloy with a thickness of 10mm and surface oxidation treatment. The grip surface is designed with anti-slip texture (tooth depth 1.5mm, tooth pitch 5mm), which conforms to GB / T14486 standard.

[0047] The center of the operating panel is 80mm from the edge of the template, which conforms to the ergonomic grip radius. The operating lever arm length is optimized to 150mm, so that the maximum force required to close the template is ≤30N. In some technical solutions, the snap-fit ​​structure includes a snap-fit ​​block 18 installed at the bottom of the operating panel a6 and a snap-fit ​​groove 19 opened at the top of the operating panel b7. The snap-fit ​​block 18 snaps into the snap-fit ​​groove 19. Both outer walls of the snap-fit ​​block 18 are provided with inclined convex surfaces 22, and both inner walls of the snap-fit ​​groove 19 are provided with inclined concave surfaces 23. The inclined convex surfaces 22 and the inclined concave surfaces 23 cooperate with each other.

[0048] The 18-inch card is made of 65Mn spring steel, with a heat treatment hardness of HRC45-50, a convex face angle of 35°, a height of 25mm, a bottom width of 18mm, and a hard chrome plating layer thickness of 8μm.

[0049] The slot is 19mm deep with a depth of 28mm. The angle of the concave surface matches that of the convex surface (tolerance ±1°). After snapping, the clearance is ≤0.15mm. It can withstand vertical impact force ≥800N.

[0050] In some technical solutions, the internal part of the locking block 18 is provided with an elastic element 20, and the end of the locking block 18 is provided with a rounded corner 21.

[0051] The elastic element 20 is a cylindrical helical compression spring (GB / T2089) with the following parameters: wire diameter φ2.5mm, mean diameter φ15mm, effective number of coils 10, free height 35mm, elastic coefficient 20N / mm, and pre-compression amount 5mm (providing 100N preload).

[0052] The end fillet of the locking block has a radius of 21 R5mm and a rounding accuracy of ±0.2mm, which reduces stress concentration during locking and improves contact fatigue life (≥500,000 locking cycles).

[0053] In some technical solutions, the side walls of both the control panel a6 and the control panel b7 are provided with a retaining groove 8.

[0054] The groove 8 is a U-shaped groove with a depth of 20mm and a width of 60mm. The groove opening has a chamfer of R3mm and is located 40mm from the edge of the operating panel. It is designed to fit the size of the palm and the web of the hand. When held with one hand, the contact area is ≥80cm², and the grip force is comfortable within the range of 20-40N. A 3mm thick silicone pad (Shore hardness A60) is attached, with a coefficient of friction ≥0.6, to prevent slippage during operation.

[0055] Linear guide rails (accuracy class H, straightness 0.01mm / m) are added to the front and rear walls of the cutting cavity, and cooperate with the guide rail sliders on the side of the template to ensure the template movement guidance accuracy of ±0.05mm;

[0056] The control panel integrates a pressure sensor (range 0-200N, accuracy 1%FS) to monitor the clamping preload force in real time, along with LED indicator lights (green: normal, red: not clamped).

[0057] The rubber product cutting template 3 adopts a quick-change interface, and with the positioning pin (diameter φ8mm) and limit key (width 10mm), it can quickly change different cutting molds within 30 seconds;

[0058] All steel components are coated with Dacromet (8-12μm thickness) and undergo salt spray testing for ≥1000 hours to adapt to humid production environments.

[0059] I. Operating Process of the Device

[0060] 1. Initial state and template opening / closing

[0061] Open state: The upper cutting template 1 is rotated upward to the 180° limit position via the right end hinge chain (stainless steel 304 hinge, equipped with 6201 bearing) around the hinge axis, the operation plate a6 is separated from the operation plate b7, and the locking structure (locking block 18 and locking slot 19) is in the unlocked state.

[0062] Closure preparation: The operator holds the U-shaped groove 8 on the side wall of the operating panel a / b. The 3mm thick silicone pad inside the groove provides a friction coefficient of ≥0.6 to ensure a stable grip. Apply a force of ≤30N with a 150mm lever arm to rotate the upper template downward around the hinge axis until the operating panels a / b are in contact.

[0063] 2. Adjusting and positioning the cutting template

[0064] Position Adjustment: According to the size of the rubber product to be cut, move the rubber product cutting template 3 laterally along the adjustment groove 12. The G5 grade steel balls (φ6mm) in the eight rotating cavities 16 on the outer wall of the shaft cylinder 14 roll in the semi-circular arc groove (radius 3.5mm) of the balance groove 11, converting sliding friction into rolling friction (friction coefficient ≤0.012), so that the no-load adjustment resistance is ≤10N. The rotating shafts (13) at both ends of the template are interference-fitted with the shaft cylinder 14 (interference amount 0.03-0.05mm) to ensure that the template remains horizontal when moving. Precise Positioning: When the template moves to the target position, the dovetail tenon (width 14mm, inclination angle 12°) of the positioning plate 9 is aligned with the dovetail groove of the positioning groove 10, and the 45° guide chamfer (C2mm) guides the tenon to quickly embed into the groove, forming a wedge fit (gap ≤0.04mm). The spring top pin (φ4mm, spring force 5-8N) is automatically inserted into the tenon positioning hole to prevent the template from accidentally falling off.

[0065] 3. Upper and lower template snap-fitting and cutting

[0066] Snap-fit ​​locking: The convex surface (35° angle) of the bottom snap-fit ​​block (18) of the operating plate a contacts the concave surface of the top slot 19 of the operating plate b. When downward pressure is applied, the elastic element (cylindrical helical spring, preload 100N) is compressed, and the rounded corner (R5mm) at the end of the snap-fit ​​block guides the snap-fit ​​block to be fully embedded in the slot. The convex surface and the concave surface fit together (fitting gap ≤0.15mm), achieving a gapless snap-fit, which can withstand a vertical impact force of ≥800N.

[0067] Cutting operation: Place the rubber product in the cutting cavity 5 of the lower cutting template 2, aligning it with the cutting opening 4 of the cutting template 3. Apply pressure by press or manually, and the upper template moves downward. The stepped cutting edge (first-level 30° cutting edge, second-level 15° finishing edge) of the cutting opening completes rough cutting and finishing in sequence, with a cutting accuracy of ±0.1mm, suitable for rubber products with a thickness of ≤15mm.

[0068] 4. Waste disposal and template repositioning

[0069] Waste collection: Waste generated during cutting falls into a removable waste box (capacity ≥1L) through a 30° inclined guide channel (50mm wide) at the bottom of the cutting cavity, and is cleaned regularly.

[0070] Template reset: After cutting, pull up the operating plate a, the elastic element resets and pushes the locking block out of the slot, and the upper template opens around the hinge axis. When adjusting the template, the limiting block (Nylon 66, Shore D75) restricts the movement range at both ends of the adjustment groove (limiting error ±0.5mm) to prevent the template from falling out.

[0071] II. Working Principle of Core Mechanisms

[0072] 1. Ball bearing balance guiding principle

[0073] Rolling friction reduction: The rolling balls 17 inside the rotating cavity 16 on the outer wall of the shaft cylinder 14 form a point contact rolling pair with the balance grooves 11 on the upper and lower walls of the adjusting groove 12. Compared with the traditional sliding structure, the frictional resistance is reduced by 80% (the no-load friction coefficient is reduced from 0.15 to 0.012), allowing for easy one-handed adjustment of the template position. Motion stability: Eight rolling balls are evenly distributed at 45° along the circumference of the shaft cylinder, forming symmetrical support. The arc design of the balance groove ensures that the rolling balls always maintain contact with the groove wall during movement, suppressing lateral swaying of the template (vertical sway ≤0.08mm) and improving the smoothness of the adjustment process.

[0074] 2. Mortise and tenon positioning and quick clamping principle

[0075] Geometric constraint positioning: The dovetail tenon structure with wedge tight fit (tenon inclination angle 12°) ensures that after the positioning plate 9 is embedded in the positioning groove 10, interference constraints are generated in both the lateral and vertical directions (lateral gap ≤ 0.05mm, vertical tolerance H9 / h9). It can withstand ≥50N lateral tensile force and ≥100N vertical pressure without additional fasteners, with a positioning accuracy of ±0.1mm.

[0076] Anti-misinsertion design: The 45° guide chamfer (C2mm) on the edge of the positioning plate / slot expands the error tolerance range of the insertion angle to ±15°. Combined with the vertical section (15mm height) and horizontal section (10mm width) of the L-shaped positioning plate, blind insertion positioning can be achieved within 3 seconds, which is 5 times more efficient than bolt fixing.

[0077] 3. Principle of elastic snap-fit ​​and self-locking

[0078] Wedge force amplification mechanism: The inclined convex surface (35°) of the locking block 18 engages with the inclined concave surface of the locking groove 19, utilizing the mechanical gain principle of the inclined surface to convert the manually applied vertical pressure into a horizontal preload. The elastic element (spring coefficient 20N / mm, pre-compression 5mm) provides the initial locking force. After locking, the contact area of ​​the inclined surface is ≥200mm², ensuring uniform distribution of contact stress and preventing loosening due to vibration.

[0079] Safety rounded corner design: The rounded corners (R5mm) at the end of the locking block reduce the edge stress concentration during locking by 60% (stress value reduced from 200MPa to 80MPa). Combined with the surface hard chrome plating (thickness 8μm), the locking structure has a lifespan of ≥500,000 cycles, meeting the requirements of high-frequency use.

[0080] 4. Ergonomic Operating Principles

[0081] Optimized lever arm: The center of the operating panel is 80mm from the edge of the template, forming a 150mm lever arm. This conforms to the optimal torque range for elbow force application in ergonomics, ensuring that the maximum force required to close the template is ≤30N (approximately 3kgf), reducing worker fatigue. Anti-slip design: The 1.5mm deep anti-slip texture on the surface of the operating panel works in conjunction with the silicone pad in the groove to increase the grip friction to ≥50N (static friction state), ensuring safe operation even when hands are wet or oily.

[0082] III. Core Logic of Performance Improvement

[0083] Modular adjustment: Through the rolling pair design of rotating shaft-shaft cylinder-ball bearing, tool-free and rapid adjustment of cutting template is achieved. With the positioning ruler (1mm accuracy), the mold switching of different specifications of rubber products can be completed within 2 minutes, increasing production efficiency by 30%.

[0084] Multi-level precision assurance: The guide rail (straightness 0.01mm / m) + ball balance groove (friction coefficient 0.012) + mortise and tenon positioning (gap 0.04mm) form a three-level precision control to ensure that the cutting edge position error is ≤0.15mm, which is significantly higher than the precision level of ±0.5mm of traditional devices.

[0085] Reliability design: The hinged chain bearing (load capacity 200kg) + damper (closing speed ≤0.5m / s) + limit bolt (vibration-proof displacement) form a multi-failure prevention structure, which makes the mean time between failures (MTBF) of the device ≥8000 hours and extends the maintenance cycle to 3 months / time.

[0086] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0087] Although the present invention has been described above with reference to embodiments, various modifications can be made and components can be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the features in the embodiments disclosed in this invention can be combined with each other in any way. The lack of an exhaustive description of these combinations in this specification is merely for the sake of brevity and resource conservation. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. An apparatus for cutting rubber products, comprising an upper cutting template (1) and a lower cutting template (2), characterized in that, The upper cutting template (1) and the lower cutting template (2) are fastened together, and their right ends are hinged together by a hinge chain. Both the upper cutting template (1) and the lower cutting template (2) have cutting cavities (5) inside. Rubber product cutting templates (3) are evenly and equidistantly assembled inside the cutting cavity (5). A cutting opening (4) is opened through the top of the rubber product cutting template (3). The inner walls of the left and right sides of the cutting cavity (5) are provided with adjustment grooves (12), and the two ends of the rubber product cutting template (3) are equipped with rotating shafts (13). The ends of the rotating shafts (13) are equipped with shaft sleeves (14), and the shaft sleeves (14) are assembled in the adjustment grooves (12). The upper end of the upper cutting template (1) is provided with positioning grooves (10) evenly spaced on both sides of the cutting cavity (5). The top two sides of the rubber product cutting template (3) are equipped with positioning plates (9), which are embedded in the positioning grooves (10).

2. A device for cutting a rubber article according to claim 1, characterized in that, The outer wall of the shaft cylinder (14) is provided with rotating cavities (16) evenly spaced along its axis. Ball bearings (17) are installed inside the rotating cavities (16). Balance grooves (11) are provided on the upper and lower inner walls of the adjusting groove (12). The ball bearings (17) are located in the balance grooves (11).

3. A device for cutting a rubber article according to claim 2, characterized in that, The shaft (14) has a mating port (15) installed inside, and the rotating shaft (13) is located inside the mating port (15).

4. A device for cutting a rubber article according to claim 1, characterized in that, The positioning plate (9) and the positioning groove (10) are connected by a mortise and tenon joint.

5. The apparatus for trimming a rubber article of claim 1 wherein, An operation plate a (6) is installed at the center of the side wall of the upper cutting template (1), and an operation plate b (7) is installed at the center of the side wall of the lower cutting template (2). The operation plate a (6) and the operation plate b (7) are connected by a snap-fit ​​structure.

6. A device for cutting a rubber article according to claim 5, characterized in that, The snap-fit ​​structure includes a snap-fit ​​block (18) installed at the bottom of the operating plate a (6) and a snap-fit ​​groove (19) opened at the top of the operating plate b (7). The snap-fit ​​block (18) snaps into the snap-fit ​​groove (19). Both outer walls of the snap-fit ​​block (18) are provided with inclined convex surfaces (22), and both inner walls of the snap-fit ​​groove (19) are provided with inclined concave surfaces (23). The inclined convex surfaces (22) and the inclined concave surfaces (23) cooperate with each other.

7. The apparatus for cutting rubber products according to claim 6, characterized in that, The card block (18) has an elastic element (20) inside, and the end of the card block (18) has a rounded corner (21).

8. A device for trimming a rubber article according to claim 6, characterized in that, Both the operation plate a (6) and the operation plate b (7) have slots (8) on their side walls.

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