Continuous motion film slitting method

Abstract

The application provides a continuous dynamic film cutting method, which cuts raw rubber film according to predetermined cutting shape and cutting parameters through a film cutting device, and measures the size, weighs and judges the cut material, further adjusts the cutting parameters based on the weight difference, the material size and the predetermined adjustable size range when the weight is judged to be not in conformity, and then cuts the material again according to the adjusted parameters through the film cutting device, so that the material with the predetermined shape and the required weight can be obtained, and the product obtained after vulcanization has more ideal properties. Compared with the manual further cutting method, the method of the application has higher automation process, and is easier to maintain the shape of the material when adjusting the weight, so that the production efficiency can be greatly improved.

Description

Technical Field

[0001] This invention belongs to the technical field of material processing methods, specifically relating to a continuous dynamic film cutting method. Background Technology

[0002] In industry, various large-sized circular rubber sheets are needed as sealing gaskets, cushioning pads, etc. Currently, these circular rubber sheets are typically produced by stamping and cutting large rubber sheets using a stamping die, followed by further processing such as vulcanization. This cutting method has several problems. First, it has high requirements for the shape of the raw rubber sheet; however, the raw rubber sheet may be irregularly shaped, making it difficult to use such a die for stamping and cutting, resulting in low utilization of the raw material. Second, to ensure that the product has ideal properties after further vulcanization, the cut circular rubber sheets need to have a relatively precise weight. However, due to the possibility of uneven thickness in the raw material sheet, it is difficult to guarantee the weight of the circular rubber sheets obtained by the above stamping method. Further manual cutting is required to achieve the predetermined weight, which is not only inefficient but also demands high skill from workers to cut smooth curves. Therefore, to solve these problems, a new cutting method is needed that can improve cutting efficiency and guarantee the weight of the cut circular rubber sheets. Summary of the Invention

[0003] This invention is made to solve the above-mentioned problems, and its purpose is to provide a cutting method that can continuously and dynamically cut film into materials with predetermined shapes and weights. The technical solution adopted by this invention is as follows:

[0004] This invention provides a continuous dynamic film cutting method for cutting raw film into materials with predetermined shapes, sizes, and weights. The method comprises the following steps: Step S1, cutting the film using a film cutting device according to predetermined cutting shapes and parameters to obtain the material; Step S2, weighing the material using a weighing device and measuring the material's dimensions using a size measuring device; Step S3, determining whether the material's weight conforms to a predetermined weight; Step S4, if Step S3 determines otherwise, adjusting the cutting parameters based on the weight difference between the material's weight and the predetermined weight, the material's dimensions, and a predetermined size range, and then the film cutting device cuts the material again based on the adjusted cutting parameters.

[0005] The continuous dynamic film cutting method provided by the present invention may also have the following technical features: the cutting shape is annular; the cutting parameters include the inner diameter and outer diameter of the material; the measured dimensions of the material include its outer diameter, inner diameter, and thickness; the continuous dynamic film cutting method further includes step S3a, further determining whether the weight of the weighed material is greater than the predetermined weight; in step S4, when step S3a determines that it is, the cutting parameters are adjusted by any one or a combination of the following methods: reducing the outer diameter; increasing the inner diameter.

[0006] The continuous dynamic film cutting method provided by the present invention may also have the following technical features, wherein, in step S4, a cutting adjustment amount is obtained based on the weight difference and the density of the adhesive, and the adjustment amounts of the inner diameter and the outer diameter are obtained based on the cutting adjustment amount and the size range.

[0007] The continuous dynamic film cutting method provided by the present invention may also have the following technical features, wherein, in the cutting parameters, the outer diameter is 500mm, 600mm, 700mm, 800mm, 900mm or 1000mm, the adjustable range of the outer diameter is -10mm, the inner diameter is 50mm or 150mm, and the adjustable range of the inner diameter is +5mm.

[0008] The continuous dynamic film cutting method provided by the present invention may also have the following technical features, wherein the film cutting device includes: a platform for placing the film; a pair of synchronous servo modules respectively disposed on both sides of the platform; a horizontal moving mechanism disposed above the platform, with the pair of servo modules respectively connected to its two ends; and a cutting head movably connected to the horizontal moving mechanism for cutting the film on the platform.

[0009] The continuous dynamic film cutting method provided by the present invention may also have the following technical features, wherein the cutting head includes: a vibrating knife module for cutting the film by high-frequency vibration; and a pressing drive mechanism for driving the vibrating knife module to press down toward the mounting table, thereby cutting into the film mounted on the mounting table.

[0010] The continuous dynamic film cutting method provided by the present invention may also have the following technical feature: the weighing device is an electronic platform scale.

[0011] The continuous dynamic film cutting method provided by the present invention may also have the following technical feature: the size measuring device is a digital vernier caliper.

[0012] Invention Function and Effect

[0013] According to the continuous dynamic film cutting method of the present invention, a film cutting device cuts raw rubber sheets according to a predetermined cutting shape and cutting parameters. The cut material is then dimensionally measured, weighed, and judged. If the weight is deemed unsuitable, the cutting parameters are adjusted based on the weight difference, material size, and a predetermined adjustable size range. The material is then cut and adjusted again by the film cutting device according to the adjusted parameters, resulting in material with a predetermined shape and the required weight. This allows the vulcanized product to have more ideal properties. Compared to manual further cutting, the method of the present invention has a higher degree of automation and is more effective at maintaining the shape of the material while adjusting its weight, thus greatly improving production efficiency. Attached Figure Description

[0014] Figure 1 This is a flowchart of the continuous dynamic film cutting method in an embodiment of the present invention;

[0015] Figure 2 This is a top view of the film cutting device in an embodiment of the present invention;

[0016] Figure 3 This is a side view of the film cutting device in an embodiment of the present invention;

[0017] Figure 4 These are side views of the film cutting device at different angles in embodiments of the present invention.

[0018] Figure label:

[0019] Film cutting device 10; mounting platform 11; conveyor belt 111; servo module 12; horizontal moving mechanism 13; cutting head 14; cutting control terminal 15. Detailed Implementation

[0020] To make the technical means, creative features, objectives and effects of the present invention easy to understand, the continuous dynamic film cutting method of the present invention will be specifically described below in conjunction with embodiments and accompanying drawings.

[0021] <Example>

[0022] Figure 1 This is a flowchart of the continuous dynamic film cutting method in this embodiment.

[0023] like Figure 1 As shown, this embodiment provides a continuous dynamic film cutting method for sequentially cutting film into circular ring-shaped materials. These materials are then placed into molds of corresponding shapes for further vulcanization and other processes. Therefore, their dimensions may have a certain range of deviations, which can be corrected in subsequent process steps. However, the quality of each material needs to be relatively precise to ensure the performance of the product after vulcanization.

[0024] The method specifically includes the following steps:

[0025] Step S1: The film cutting device cuts the film according to the predetermined cutting shape and cutting parameters, and cuts out multiple materials in sequence.

[0026] Figure 2-4 These are the top view and side view of the film cutting device in this embodiment, respectively. Figure 3 To show the positional relationship between the cutting head and the platform surface, the structure of the servo modules on both sides is omitted.

[0027] like Figure 2-4 As shown, the film cutting device 10 in this embodiment is a cutting machine in the prior art, which includes a platform 11, a pair of synchronous servo modules 12, a horizontal moving mechanism 13, a cutting head 14, and a cutting control terminal 15.

[0028] A conveyor belt 111 is provided on the mounting platform 11. The film to be cut is laid on the conveyor belt 111, which can move the film to facilitate cutting. The cutting head 14 is mounted on the horizontal moving mechanism 13, which can move horizontally along the direction D1 in the figure under its drive. The horizontal moving mechanism 13 includes linear guide rails, synchronous belts, drive motors, etc. A pair of servo modules 12 are connected to each end of the horizontal moving mechanism 13. Therefore, under the drive of the pair of servo modules 12, the cutting head 14 can move horizontally along the direction D2 in the figure.

[0029] The cutting head 14 is used to cut the film laid on the conveyor belt 111. In this embodiment, the cutting head 14 includes a blade holder, a vibrating blade module, and a pressing drive mechanism. The blade holder is mounted on the horizontal moving mechanism 13. The vibrating blade module is mounted on the blade holder. The pressing drive mechanism is connected to the vibrating blade module and can drive the vibrating blade module to press down towards the conveyor belt 111, so that its blade head cuts into the film placed on the conveyor belt 111. Subsequently, the horizontal moving mechanism 13 and a pair of servo modules 12 drive the vibrating blade module to move horizontally along a predetermined trajectory, thereby cutting out a circle with a predetermined diameter. The vibrating blade module performs cutting in a high-frequency vibration mode, which is suitable for cutting flexible materials with a certain thickness, such as film, and the cutting speed is fast. The vibrating blade module is prior art, and its structure can be found in CN112428342A, which will not be described in detail here.

[0030] The cutting control terminal 15 is used to control the cutting process. In this embodiment, the cutting control terminal 15 is a computer with corresponding engineering control software installed. The computer is connected to the film cutting device 10. The engineering control software can automatically generate an optimized layout diagram, the movement trajectory of the cutter head corresponding to the layout diagram, and the cutting trajectory according to the size of the film, the shape and size of the material input by the operator. The software can also control the film cutting device 10 to cut according to the layout diagram, the movement trajectory and the cutting trajectory.

[0031] Based on the film cutting device 10 described above, step S1 specifically includes the following sub-steps:

[0032] In step S1-1, the staff sets parameters such as the width of the film, the shape and size of the material through the cutting control terminal 15, and the software generates the layout diagram, the movement trajectory of the cutter head, and the cutting trajectory.

[0033] In this embodiment, the operator sets the material to be cut into a circular shape, and sets its inner diameter and outer diameter. The inner diameter is 50mm or 150mm, and the outer diameter is 500mm, 600mm, 700mm, 800mm, 900mm or 1000mm.

[0034] In steps S1-2, the staff further sets parameters such as vibration frequency and cutting speed through the cutting control terminal 15.

[0035] In steps S1-3, the workers lay the film to be cut on the middle of the conveyor belt 111 and start the cutting process through the cutting control terminal 15.

[0036] In steps S1-4, the film cutting device 10 cuts the film sequentially according to the generated layout diagram, movement trajectory, cutting trajectory and preset parameters to obtain multiple materials.

[0037] In this embodiment, the film cutting device 10 moves sequentially to the predetermined position of each material according to the generated layout diagram in a bow-shaped trajectory, and cuts them sequentially.

[0038] Step S2: Weigh the material obtained from cutting using a weighing device, and measure the size of the material using a size measuring device.

[0039] In this embodiment, the weighing device is an ACS-15 electronic platform scale, with a measuring range of 0-15 kg and Class III accuracy, enabling precise weighing. Workers place the cut materials onto the weighing pan of the electronic platform scale for weighing.

[0040] The dimensional measuring device is a Mitutoyo digital vernier caliper from Japan, with a measuring range of 0–150 mm and an accuracy of ±0.02 mm, enabling precise dimensional measurement. Due to the high cutting precision of the film cutting device 10, the inner and outer diameters of the cut material are essentially the set values. However, since the original sheet may have uneven thickness, the material thickness needs to be measured. After separating the cut material from the remaining film, the worker lays the material flat and measures its thickness using the digital vernier caliper. In this embodiment, four points evenly distributed along the circumference are selected on both the inner and outer rings for measurement, and the average of the measured thickness values ​​is taken.

[0041] Steps S1 and S2-S3 can be performed simultaneously, meaning the film cutting device 10 cuts continuously in sequence, while the workers weigh and measure the dimensions of the cut materials in sequence, thereby further improving efficiency.

[0042] Step S3: Determine whether the weight of the material meets the predetermined weight.

[0043] If the judgment is yes, it means that the cut material meets the weight requirements and can be transferred to the next workstation for subsequent processes; if the judgment is no, it means that the material does not meet the weight requirements and needs to be processed.

[0044] Step S3a: Further determine whether the weight of the material is greater than the predetermined weight.

[0045] If the material weighs more than the predetermined weight, it can be cut again until its weight is at the predetermined weight; if the material weighs less than the predetermined weight, it should be discarded.

[0046] If the determination in step S4 and step S3a is yes, the cutting parameters are adjusted based on the weight difference between the material weight and the predetermined weight, the size of the material and the predetermined size range, and the film cutting device 10 cuts the material again based on the adjusted cutting parameters.

[0047] The volume to be cut again can be obtained based on the weight difference and the density of the film. Further, based on this volume, the adjustable size range, and the inner and outer diameters of the material, as well as the measured thickness, the adjustment amounts for the outer and inner diameters can be calculated. In this embodiment, the adjustable amount for the outer diameter is -10mm, meaning that for a 500mm outer diameter, the adjustable range is 490mm to 500mm. The adjustable range for the inner diameter is +5mm, meaning that for a 50mm inner diameter, the adjustable range is 50mm to 55mm. One of the inner or outer diameters is adjusted first. If the adjustment reaches the boundary value of the adjustable range but still does not reach the volume to be cut, then the other diameter is adjusted.

[0048] In this embodiment, the operator inputs the measured dimensions and weight data into the cutting control terminal 15 (computer). Values ​​such as film density, the predetermined weight of a single material, and the adjustable size range are pre-stored in the computer. Based on the aforementioned algorithm, the software automatically generates the adjusted cutting shape, inner diameter, and outer diameter. Then, the material is cut again based on the adjusted dimensions. The cutting head 14 also has a crosshair cursor, which emits a crosshair for cutting positioning. The material to be cut again is placed at the corresponding position on the conveyor belt 111 according to this crosshair, allowing the device to accurately cut the material again and obtain material with the required weight.

[0049] After step S4, you can also return to step S2 to weigh and measure the dimensions of the adjusted material again, and cut and adjust it again if the weight still does not meet the requirements.

[0050] Functions and effects of the embodiments

[0051] According to the continuous dynamic film cutting method provided in this embodiment, the raw rubber sheet is cut by a film cutting device according to a predetermined cutting shape and cutting parameters. The dimensions of the cut material are measured, weighed, and judged. If the weight is determined to be inconsistent, the cutting parameters are adjusted based on the weight difference, material size, and a predetermined adjustable size range. Then, the film cutting device cuts and adjusts the material again according to the adjusted parameters, thereby obtaining material with a predetermined shape and the required weight. This allows the vulcanized product to have more ideal properties. Compared with manual cutting, the method of this invention has a higher degree of automation and is more likely to maintain the shape when adjusting the weight of the material, which can greatly improve production efficiency.

[0052] In this embodiment, the film cutting device has a cutting control terminal and is equipped with corresponding engineering control software, which can automatically generate an optimized layout diagram based on the input of the staff, thereby making full use of the raw material sheet.

[0053] Furthermore, this film cutting device uses a high-frequency vibrating knife to cut the film. The high-frequency vibrating knife has strong cutting ability and high precision, making it suitable for cutting flexible materials with a certain thickness, such as film. The vibrating knife module is connected to the pressing drive mechanism, the rotating drive mechanism, and the distance adjustment mechanism. Under its drive, it can press down on the film on the platform to cut into the film and rotate to cut out circles. The vibrating knife module can move towards or away from the center of rotation, thus accurately cutting circles with different diameters.

[0054] Furthermore, through precise measurement using electronic platform scales and digital calipers, along with software calculations, the cutting parameters can be automatically adjusted according to a predetermined algorithm. The film cutting device then cuts the material again based on the adjusted parameters, ensuring it reaches the predetermined weight. Compared to manual methods, this approach is not only easier to operate and maintains the product's shape, but also effectively guarantees the adjustment amount through software calculations. Essentially, the ideal weight can be achieved after just one adjustment, eliminating the need for repeated cutting, adjustment, and weighing as with manual methods, thus significantly improving production efficiency.

[0055] The above embodiments are only used to illustrate specific implementations of the present invention, and the present invention is not limited to the scope of the description of the above embodiments.

Claims

1. A continuous dynamic film cutting method for cutting a film into materials having a predetermined shape and a predetermined weight in sequence, characterized by, The method comprises the following steps: ​ Step S1, cutting the film according to a predetermined cutting shape and cutting parameters by a film cutting device to obtain the material; Step S2, weighing the material by a weighing device and measuring the size of the material by a size measuring device; Step S3, judging whether the weight of the material meets the predetermined weight; Step S3a, when the judgment in step S3 is no, further judging whether the weight of the material is greater than the predetermined weight, Step S4, when the judgment in step S3 is no and the judgment in step S3a is yes, adjusting the cutting parameters based on the weight difference between the weight of the material and the predetermined weight, the size of the material and the predetermined size range, and cutting the material again by the film cutting device based on the adjusted cutting parameters, wherein the cutting shape is a circular ring shape, the cutting parameters include the inner diameter and the outer diameter of the material, and the measured size of the material includes the outer diameter, the inner diameter and the thickness, in step S4, when the judgment in step S3a is yes, the cutting parameters are adjusted in any one of the following ways or a combination of the two ways: reducing the outer diameter and expanding the inner diameter.

2. The continuous dynamic film cutting method according to claim 1, wherein: wherein in step S4, the adjustment amount of cutting is obtained according to the weight difference and the density of the material, and the adjustment amount of the inner diameter and the outer diameter is obtained according to the adjustment amount of cutting and the size range.

3. The continuous dynamic film cutting method according to claim 2, wherein: wherein, in the cutting parameters, the size of the outer diameter is 500mm, 600mm, 700mm, 800mm, 900mm or 1000mm, the adjustable range of the outer diameter is -10mm, the size of the inner diameter is 50mm or 150mm, and the adjustable range of the inner diameter is +5mm.

4. The continuous dynamic film cutting method of claim 1, characterized in that: wherein the film cutting device comprises: a loading table for loading the film; a pair of synchronous servo modules arranged on both sides of the loading table; a horizontal moving mechanism arranged above the loading table and connected to a pair of servo modules at both ends; and a cutting head movably connected to the horizontal moving mechanism for cutting the film on the loading table.

5. The continuous dynamic film cutting method of claim 4, characterized in that: wherein the cutting head comprises: a vibrating knife module for cutting the film in a high-frequency vibrating manner; and a downward driving mechanism for driving the vibrating knife module to press downward toward the loading table so as to cut into the film loaded on the loading table.

6. The continuous dynamic film cutting method according to claim 1, wherein: wherein, the weighing device is an electronic platform scale.

7. The continuous dynamic film cutting method according to claim 1, wherein: wherein the size measuring device is a digital vernier caliper.

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