A fully automatic thickness and weight measuring system for plastic film

Abstract

The application relates to a full-automatic thickness measuring and weighing system for a plastic film, belonging to the field of plastic production equipment, which comprises a rack, a traction roller set, a supporting roller and a thickness measuring and winding platform arranged on the rack from left to right; the traction roller set comprises upper and lower traction rollers; the thickness measuring and winding platform comprises a mounting frame arranged on the rack, the left end of the mounting frame is rotatably arranged on the rack through a rotating mechanism, a receiving roller, a transition roller and a winding roller are sequentially arranged on the mounting frame from left to right, the upper end of the transition roller is flush with the upper end of the receiving roller, a measuring surface is formed between the upper end of the transition roller and the upper end of the receiving roller; a thickness gauge is further arranged on the rack, the thickness gauge is located between the receiving roller and the transition roller and above the measuring surface, and is used for measuring the thickness of the plastic film below and on the measuring surface. The application can effectively improve the thickness measuring accuracy of the plastic film.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of plastic production equipment, in particular to a full-automatic thickness measuring and weighing system for plastic film. BACKGROUND

[0002] Plastics refers to a material that can be flow formed in the processing process with resin as the main component and plasticizer, filler, lubricant, colorant and other additives as auxiliary components. Among them, plastic film is often used as packaging material due to its excellent physical properties.

[0003] After the production of plastic film is completed, it needs to be aligned and wound for convenient storage. In this process, in order to detect whether the produced plastic film is qualified, the thickness of the plastic film needs to be detected. However, since the detection width of the thickness gauge used for plastic film thickness measurement is limited, when the width of the plastic film is greater than the detection width of the thickness gauge, the thickness gauge needs to be moved to detect the plastic film. For example, the patent document with publication number CN217276095U discloses a thickness gauge for plastic film production equipment. The output shaft of the servo motor is connected to the positive and negative toothed screw through a coupling to rotate smoothly. When the positive and negative toothed screw rotates, the thickness gauge body screwed on it moves according to the width of the plastic film, thereby realizing the thickness measurement of the plastic film in the entire width direction. However, compared with the fixed thickness gauge, the movement of the thickness gauge under the rotation of the positive and negative toothed screw will cause a certain deflection of the thickness gauge during the movement, thereby affecting the measurement result of the thickness gauge and further affecting the accuracy of the entire thickness measurement process. SUMMARY

[0004] Therefore, it is necessary to provide a full-automatic thickness measuring and weighing system for plastic film, which comprises a rack, a traction roller set, a supporting roller and a thickness measuring and winding platform arranged in sequence from left to right on the rack; the traction roller set comprises upper and lower traction rollers; the thickness measuring and winding platform comprises a mounting bracket arranged on the rack, the left end of the mounting bracket is rotatably arranged on the rack through a rotating mechanism, the mounting bracket is sequentially provided with a receiving roller, a transition roller and a winding roller from left to right, the upper end of the transition roller is flush with the upper end of the receiving roller, and a measuring surface is formed between the transition roller and the upper end of the receiving roller; a thickness gauge is further arranged on the rack, the thickness gauge is located between the receiving roller and the transition roller and above the measuring surface, and is used to measure the thickness of the plastic film located below the measuring surface.

[0005] In the application, the traction roller group is used for connecting the plastic film production equipment, and the plastic film produced by the plastic film production equipment is drawn to the application and transported, wherein the plastic film is drawn to the application, and the path of the plastic film after being drawn to the application is as follows: the plastic film is wound around the supporting roller from above the supporting roller, and then the plastic film is wound around the receiving roller from above the receiving roller, wherein the plastic film between the receiving roller and the supporting roller needs to be in a natural falling state, and then the plastic film is wound around the transition roller from above the measuring surface of the transition roller, and then the plastic film is wound around the winding roller from below the winding roller, wherein the winding roller can wind the plastic film by rotating.

[0006] In the application, the thickness gauge is used to measure the thickness of the plastic film passing through the measuring surface, and various thickness gauges for measuring the thickness of the plastic film on the market can be selected, wherein if the selected thickness gauge also needs to be provided with a corresponding detection structure below the plastic film, the detection structure can be detached from the thickness gauge, independently installed on the rack, and located below the plastic film, so that the installation of the thickness gauge can be realized.

[0007] In the application, during the measurement of the thickness of the plastic film by the thickness gauge, the mounting frame rotates under the drive of the rotating mechanism, at this time, the plastic film below the thickness gauge swings below the thickness gauge, so that the thickness gauge can fully cover the width direction of the plastic film, that is, the application can measure the thickness of the entire width direction of the plastic film, and does not need to move the thickness gauge, compared with moving the thickness gauge to measure the thickness of the entire width direction of the plastic film, the application can effectively avoid the deflection of the thickness gauge during movement, so that the side thickness accuracy of the thickness gauge can be effectively ensured, and the side thickness accuracy of the thickness gauge is improved.

[0008] Further, the mounting frame is further provided with a weight measuring mechanism, the weight measuring mechanism comprises a measuring rod rotatably arranged on the mounting frame through a rotating shaft; one end of the measuring rod is located below the winding roller to form a measuring end, the measuring end abuts against the lower end of the plastic film wound on the winding roller, the other end of the measuring rod is located on the side of the rotating shaft away from the measuring end to form an abutting end, and the lower end of the mounting frame is provided with a pressure sensor corresponding to the abutting end.

[0009] In the application, the two side ends of the measuring rod abut against the lower end of the plastic film wound on the winding roller, thus, with the winding process of the winding roller, the measuring end of the measuring rod is pushed down by the plastic film until the abutting end of the measuring rod abuts against and is detected by the pressure sensor, at this time, it indicates that the diameter of the plastic film wound on the winding roller reaches the preset value, and accordingly, the mass thereof also reaches the preset value, at this time, the plastic film wound on the winding roller needs to be taken down and stored for delivery. It can be seen that the application can also detect the weight of the plastic film wound in real time during the winding of the plastic film after the thickness measurement is completed, and can effectively improve the accuracy of the winding amount of the winding roller to avoid the need for rewinding the plastic film due to the incorrect winding weight.

[0010] Further, the measuring rod is connected with the mounting frame through the torsion spring sleeved on the rotating shaft.

[0011] In the application, the torsion spring is used to provide a pressing force on the plastic film on the winding roller for the measuring rod to ensure that the measuring rod can always be pressed on the plastic film on the winding roller.

[0012] Further, the rack is also provided with a tensioning roller, which is located between the supporting roller and the thickness-measuring winding platform, and the two ends of the tensioning roller are hung on the two ends of the hanging rod arranged on the rack through traction ropes.

[0013] In the application, the tensioning roller is hung on the hanging rod through the traction ropes, thus, the tensioning roller can straighten the plastic film naturally falling between the supporting roller and the receiving roller to avoid the occurrence of creases or wrinkles on the receiving roller when the plastic film is wound on the receiving roller.

[0014] Preferably, detection sensors can also be arranged on both sides of the naturally falling plastic film to detect the falling height of the plastic film to facilitate the adjustment of the conveying and winding speed of the traction roller set and the winding roller on the plastic film when the plastic film falls to the preset lowest height, and the naturally falling plastic film is pulled up to avoid the falling position of the plastic film being too low to cause the plastic film to fall to the ground and be contaminated.

[0015] Further, the length of the hanging rod is longer than the length of the tensioning roller, and the lengths of the traction ropes arranged at the two ends of the tensioning roller are equal.

[0016] In the application, the length of the hanging rod is longer than the length of the tensioning roller, thus, when the tensioning roller is hung on the hanging rod through the traction ropes with equal lengths, the tensioning roller, the traction ropes and the hanging rod will form an inverted trapezoidal shape, which can effectively reduce the front and rear swinging of the tensioning roller, and in turn, can effectively improve the stability of the naturally falling plastic film and reduce the influence of the swinging of the naturally falling plastic film on the conveying of the plastic film.

[0017] Further, the first pressing roller and the second pressing roller are arranged on the rack correspondingly to the supporting roller and the receiving roller respectively, the first pressing roller is arranged above the supporting roller to form a supporting roller group with the supporting roller, and the second pressing roller is arranged above the receiving roller to form a receiving roller group with the receiving roller.

[0018] In the application, the first pressing roller and the second pressing roller are used to press the plastic film on the supporting roller and the receiving roller respectively, which can effectively avoid the plastic film from deviating from the supporting roller and the receiving roller during the conveying process, thereby improving the conveying precision of the plastic film during the conveying process and improving the neatness when the winding roller winds the plastic film.

[0019] Further, the first pressing roller is provided with a plurality of first needle-shaped protrusions uniformly arranged around the first pressing roller, and the surface of the supporting roller is embedded with a first rubber buffer ring for the first needle-shaped protrusions to insert correspondingly to the first needle-shaped protrusions; the second pressing roller is provided with a plurality of second needle-shaped protrusions uniformly arranged around the second pressing roller, and the surface of the receiving roller is embedded with a second rubber buffer ring for the second needle-shaped protrusions to insert correspondingly to the second needle-shaped protrusions.

[0020] In the application, the first needle-shaped protrusions and the second needle-shaped protrusions arranged on the first pressing roller and the second pressing roller can fix the plastic film on the supporting roller and the receiving roller when the plastic film passes through the supporting roller and the receiving roller, thereby ensuring that the plastic film will not deviate from the supporting roller and the receiving roller during the swinging of the mounting rack, and thereby avoiding the plastic film conveyed by the application from being folded or wrinkled.

[0021] Further, the mounting rack is provided with a slitting device correspondingly to the two sides of the measuring surface, and the slitting device is located on the left side of the thickness gauge.

[0022] In the application, the specific position of the slitting device needs to be set according to the position of the needle-shaped protrusions arranged on the first pressing roller and the second pressing roller, and the preset slitting width of the plastic film, so that the plastic film is slitted to the preset width when passing through the slitting device, and the part of the plastic film pierced by the first needle-shaped protrusions and the second needle-shaped protrusions can be cut off by the slitting device.

[0023] Further, the rack is further provided with a guide rail, the guide rail is located below the mounting rack, the guide rail is arranged in a circular arc shape, and the center of the guide rail coincides with the rotation center line of the mounting rack; the mounting rack is provided with a sliding mounting seat for slidably connecting with the guide rail correspondingly to the guide rail.

[0024] In the application, the guide rail supports the support frame, and can make the rotation of the mounting frame more stable when the mounting frame is rotated by the rotating mechanism, reduce the deflection degree of the plastic film during the rotation of the mounting frame, and further improve the thickness measurement accuracy of the plastic film.

[0025] The principle and effect of the application will be further described in combination with the above technical solutions and the drawings:

[0026] In the application, the mounting frame rotates under the driving of the rotating mechanism during the thickness measurement of the plastic film, at this time, the plastic film below the thickness gauge swings below the thickness gauge, so that the thickness gauge can fully cover the width direction of the plastic film, that is, the application can measure the thickness of the whole width direction of the plastic film, and does not need to move the thickness gauge, compared with moving the thickness gauge to measure the thickness of the whole width direction of the plastic film, the application can effectively avoid the deflection of the thickness gauge during the movement, so that the side thickness accuracy of the thickness gauge can be effectively ensured, and the side thickness accuracy of the thickness gauge is improved. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 Structure diagram of the full-automatic thickness and weighing system for plastic film according to the embodiment of the application Figure One ;

[0028] Figure 2 Structure diagram of the full-automatic thickness and weighing system for plastic film according to the embodiment of the application Figure Two ;

[0029] Figure 3 Structure diagram of the full-automatic thickness and weighing system for plastic film according to the embodiment of the application Figure Three ;

[0030] Figure 4 Structure diagram of the full-automatic thickness and weighing system for plastic film according to the embodiment of the application after the mounting frame swings Figure One ;

[0031] Figure 5 Structure diagram of the full-automatic thickness and weighing system for plastic film according to the embodiment of the application after the mounting frame swings Figure Two .

[0032] BRIEF DESCRIPTION OF DRAWINGS

[0033] 11 - upper traction roller, 12 - lower traction roller, 2 - support roller, 31 - mounting frame, 32 - rotating mechanism, 33 - receiving roller, 34 - transition roller, 35 - winding roller, 36 - sliding mounting seat, 37 - measuring rod, 371 - measuring end, 372 - abutting end, 38 - pressure sensor, 4 - first compression roller, 41 - first needle-shaped protrusion, 5 - second compression roller, 51 - second needle-shaped protrusion, 6 - hanging rod, 61 - traction rope, 7 - tensioning roller, 8 - guide rail, 9 - thickness gauge, 10 - plastic film. DETAILED DESCRIPTION

[0034] For the convenience of those skilled in the art to understand, the present application will be further described in detail below in combination with the drawings and examples:

[0035] As Figures 1-5 An automatic thickness and weight measuring system for plastic film, comprising a rack (not shown in the figure), the rack is sequentially provided with a traction roller set, a support roller 2 and a thickness measuring and winding platform from left to right; the traction roller set comprises an upper traction roller 11 and a lower traction roller 12 arranged one above the other; the thickness measuring and winding platform comprises a mounting frame 31 arranged on the rack, the left end of the mounting frame 31 is rotatably arranged on the rack through a rotating mechanism 32, the mounting frame 31 is sequentially provided with a receiving roller 33, a transition roller 34 and a winding roller 35 from left to right, the upper end of the transition roller 34 is flush with the upper end of the receiving roller 33, and a measuring surface is formed between the upper end of the transition roller 34 and the receiving roller 33; the rack is further provided with a thickness gauge 9, the thickness gauge 9 is located between the receiving roller 33 and the transition roller 34 and above the measuring surface, and is used to measure the thickness of the plastic film 10 below the measuring surface.

[0036] In the present application, the traction roller set is used to connect the plastic film 10 production equipment, and the plastic film 10 produced by the plastic film 10 production equipment is pulled to the present application and transported, wherein after the plastic film 10 is pulled to the present application, the path through the present application is: passing over the support roller 2 from above the support roller 2, then passing over the receiving roller 33 from above the receiving roller 33, wherein the plastic film 10 located between the receiving roller 33 and the support roller 2 needs to be in a natural falling state, then passing over the transition roller 34 from above the transition roller 34 through the measuring surface, then passing over the winding roller 35 from below the winding roller 35 and winding on the winding roller 35, wherein the winding roller 35 can wind the plastic film 10 by rotating.

[0037] In the application, the thickness gauge 9 is used to measure the thickness of the plastic film 10 passing through the measuring surface, and the thickness gauge 9 can be selected from various thickness gauges on the market that can be used to measure the thickness of the plastic film 10. If the selected thickness gauge 9 also needs to be provided with a corresponding detection structure below the plastic film 10, the detection structure can be detached from the thickness gauge 9, independently installed on the rack, and located below the plastic film 10, so that the installation of the thickness gauge 9 can be realized.

[0038] In the application, during the measurement of the thickness of the plastic film 10, the mounting bracket 31 rotates under the drive of the rotating mechanism 32, at this time, the plastic film 10 below the thickness gauge 9 swings below the thickness gauge 9, so that the thickness gauge 9 can fully cover the width direction of the plastic film 10, that is, the application can measure the thickness of the entire width direction of the plastic film 10, and does not need to move the thickness gauge 9, relative to moving the thickness gauge 9 to measure the thickness of the entire width direction of the plastic film 10, the application can effectively avoid the deflection of the thickness gauge 9 during movement, so that the side thickness accuracy of the thickness gauge 9 can be effectively ensured, and the side thickness accuracy of the thickness gauge 9 is improved.

[0039] In one embodiment, the mounting bracket 31 is also provided with a weight measuring mechanism, the weight measuring mechanism includes a measuring rod 37 rotatably arranged on the mounting bracket 31 through a rotating shaft, one end of the measuring rod 37 is located below the winding roller 35 to form a measuring end 371, the measuring end 371 abuts against the lower end of the plastic film 10 wound on the winding roller 35, the other end of the measuring rod 37 is located on the side away from the measuring end 371 of the rotating shaft to form an abutting end 372, and the lower end of the mounting bracket 31 is provided with a pressure sensor 38 corresponding to the abutting end 372.

[0040] In the embodiment, the two ends of the measuring rod 37 abut against the lower end of the plastic film 10 wound on the winding roller 35, therefore, as the winding process of the winding roller 35 proceeds, the measuring end 371 of the measuring rod 37 is pushed downward by the plastic film 10, until the abutting end 372 of the measuring rod 37 abuts against and is detected by the pressure sensor 38, at this time, it indicates that the diameter of the plastic film 10 wound on the winding roller 35 reaches the preset value, and accordingly, the mass also reaches the preset value, at this time, the plastic film 10 wound on the winding roller 35 needs to be taken down and stored for shipment. It can be seen that the application can also detect the weight of the plastic film 10 wound in real time during the winding of the plastic film 10 after the thickness measurement is completed, which can effectively improve the accuracy of the winding amount of the winding roller 35, so as to avoid the need for rewinding of the plastic film 10 due to the incorrect winding weight.

[0041] In one embodiment, the measuring rod 37 is connected with the mounting bracket 31 through a torsional spring sleeved on the rotating shaft.

[0042] In this embodiment, the torsion spring is used to provide a pressing force on the plastic film 10 on the winding roller 35 for the measuring rod 37 to ensure that the measuring rod 37 can always press on the plastic film 10 on the winding roller 35.

[0043] In one embodiment, the rack is further provided with a tension roller 7, which is located between the support roller 2 and the thickness measuring winding platform, and the two ends of the tension roller 7 are hung on the two ends of the hanging rod 6 provided on the rack through traction ropes 61.

[0044] In this embodiment, the tension roller 7 is hung on the hanging rod 6 through the traction ropes 61, so that the tension roller 7 can straighten the plastic film 10 naturally falling between the support roller 2 and the receiving roller 33 to avoid creases or wrinkles on the receiving roller 33 when the plastic film 10 is wound onto the receiving roller 33.

[0045] Preferably, detection sensors can also be provided on both sides of the naturally falling plastic film 10 to detect the falling height of the plastic film 10 to facilitate adjusting the conveying and winding speed of the traction roller group and the winding roller 35 for the plastic film 10 when the plastic film 10 falls to a preset minimum height, and pulling up the naturally falling plastic film 10 to avoid the plastic film 10 falling to the ground being contaminated due to the falling position of the plastic film 10 being too low.

[0046] In one embodiment, the length of the hanging rod 6 is longer than the length of the tension roller 7, and the lengths of the traction ropes 61 provided at the two ends of the tension roller 7 are equal.

[0047] In this embodiment, the length of the hanging rod 6 is longer than the length of the tension roller 7, so that when the tension roller 7 is hung on the hanging rod 6 through the traction ropes 61 with equal lengths, the tension roller 7, the traction ropes 61 and the hanging rod 6 will form an inverted trapezoidal shape, which can effectively reduce the front and rear swinging of the tension roller 7, and in turn can effectively improve the stability of the naturally falling plastic film 10 and reduce the impact of the swinging of the naturally falling plastic film 10 on the conveying of the plastic film 10.

[0048] In one embodiment, the rack is further provided with a first pressing roller 4 and a second pressing roller 5 corresponding to the support roller 2 and the receiving roller 33, respectively, the first pressing roller 4 is located above the support roller 2 to form a support roller 2 group with the support roller 2, and the second pressing roller 5 is located above the receiving roller 33 to form a receiving roller 33 group with the receiving roller 33.

[0049] In the embodiment, the first pressing roller 4 and the second pressing roller 5 are used to press the plastic film 10 on the support roller 2 and the receiving roller 33 respectively, which can effectively avoid the plastic film 10 from being offset relative to the support roller 2 and the receiving roller 33 during the conveying process, so as to improve the conveying precision of the conveying process of the plastic film 10 by the present application, thereby improving the neatness when the plastic film 10 is wound on the winding roller 35.

[0050] In one embodiment, the first pressing roller 4 is provided with a plurality of first needle-shaped protrusions 41 uniformly arranged around the first pressing roller 4, and the surface of the support roller 2 is correspondingly provided with a first rubber buffer ring for the first needle-shaped protrusions 41 to be inserted; the second pressing roller 5 is provided with a plurality of second needle-shaped protrusions 51 uniformly arranged around the second pressing roller 5, and the surface of the receiving roller 33 is correspondingly provided with a second rubber buffer ring for the second needle-shaped protrusions 51 to be inserted.

[0051] In the embodiment, the first needle-shaped protrusions 41 and the second needle-shaped protrusions 51 arranged on the first pressing roller 4 and the second pressing roller 5 can fix the plastic film 10 on the support roller 2 and the receiving roller 33 when the plastic film 10 passes through the support roller 2 and the receiving roller 33, so that the plastic film 10 can be prevented from being offset relative to the support roller 2 and the receiving roller 33 during the swinging of the mounting frame 31, thereby avoiding the plastic film 10 conveyed by the present application from being folded or wrinkled.

[0052] In one embodiment, the mounting frame 31 is provided with a slitting device on each side of the measuring surface, and the slitting device is located on the left side of the thickness gauge 9.

[0053] In the embodiment, the specific position of the slitting device needs to be set according to the position of the needle-shaped protrusions arranged on the first pressing roller 4 and the second pressing roller 5, and the preset slitting width of the plastic film 10, so that the plastic film 10 can be slit to the preset width when passing through the slitting device, and the part of the plastic film 10 pierced by the first needle-shaped protrusions 41 and the second needle-shaped protrusions 51 can be cut off by the slitting device.

[0054] In one embodiment, the rack is further provided with a guide rail 8, the guide rail 8 is located below the mounting frame 31, the guide rail 8 is arranged in a circular arc shape, and the center of the guide rail 8 coincides with the rotation center line of the mounting frame 31; the mounting frame 31 is provided with a sliding mounting seat 36 for slidably connecting with the guide rail 8.

[0055] In the embodiment, the guide rail 8 supports the support frame, and can make the rotation of the mounting frame 31 more stable when the rotating mechanism 32 drives the mounting frame 31 to rotate, reduce the deflection degree of the plastic film 10 in the rotation process of the mounting frame 31, and further improve the thickness measurement accuracy of the plastic film 10.

[0056] The above embodiments only express several embodiments of the present application, and the description is more specific and detailed, but it cannot be understood as the limitation of the patent scope of the application. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A fully automatic thickness and weight measuring system for plastic films, characterized in that, The application relates to a plastic film thickness measuring and rolling device, which comprises a rack, a traction roller group, a supporting roller, a thickness measuring and rolling platform arranged on the rack in sequence from left to right, an upper traction roller and a lower traction roller arranged on the rack in sequence, a mounting frame arranged on the rack, a left end of the mounting frame rotatably arranged on the rack through a rotating mechanism, a receiving roller, a transition roller and a rolling roller arranged on the mounting frame in sequence from left to right, the upper end of the transition roller arranged flush with the upper end of the receiving roller, a measuring surface formed between the upper end of the transition roller and the upper end of the receiving roller, a thickness measuring instrument arranged on the rack, the thickness measuring instrument located between the receiving roller and the transition roller and above the measuring surface, used for measuring the thickness of the plastic film below the measuring surface, a weight measuring mechanism arranged on the mounting frame, the weight measuring mechanism comprising a measuring rod rotatably arranged on the mounting frame through a rotating shaft, one end of the measuring rod located below the rolling roller to form a measuring end, the measuring end abutting against the lower end of the plastic film rolled on the rolling roller, the other end of the measuring rod located on the side of the rotating shaft away from the measuring end to form an abutting end, and a pressure sensor arranged on the lower end of the mounting frame corresponding to the abutting end.

2. A fully automatic thickness and weight measuring system for plastic film as claimed in claim 1 wherein, The measuring rod is connected with the mounting frame through a torsion spring sleeved on the rotating shaft.

3. A fully automatic thickness and weight measuring system for plastic film as claimed in claim 1 wherein, A tensioning roller is arranged on the rack, the tensioning roller located between the supporting roller and the thickness measuring and rolling platform, and the two ends of the tensioning roller hung on the two ends of a hanging rod arranged on the rack through traction ropes.

4. A fully automatic thickness and weight measuring system for plastic film as claimed in claim 3 wherein, The length of the hanging rod is longer than the length of the tensioning roller, and the lengths of the traction ropes arranged on the two ends of the tensioning roller are equal.

5. A fully automatic thickness and weight measuring system for plastic film as claimed in claim 4 wherein, First and second pressing rollers are arranged on the rack corresponding to the supporting roller and the receiving roller respectively, the first pressing roller located above the supporting roller to form a supporting roller group with the supporting roller, and the second pressing roller located above the receiving roller to form a receiving roller group with the receiving roller.

6. A fully automatic thickness and weight measuring system for plastic film as claimed in claim 5 wherein, First needle-shaped protrusions are arranged on the two ends of the first pressing roller, the surface of the supporting roller corresponding to the first needle-shaped protrusions embedded with first rubber buffer rings for the first needle-shaped protrusions to be inserted.

7. A fully automatic thickness and weight measuring system for plastic film as claimed in claim 6 wherein, Second needle-shaped protrusions are arranged on the two ends of the second pressing roller, the surface of the receiving roller corresponding to the second needle-shaped protrusions embedded with second rubber buffer rings for the second needle-shaped protrusions to be inserted.

8. A fully automatic thickness and weight measuring system for plastic film as claimed in claim 7, wherein, Slitting devices are arranged on the mounting frame corresponding to the two sides of the measuring surface respectively, and the slitting devices located on the left side of the thickness measuring instrument.

9. A fully automatic thickness and weight measuring system for plastic film as claimed in claim 1 wherein, A guide rail is arranged on the rack, the guide rail located below the mounting frame, the guide rail arranged in a circular arc shape, and the center of the guide rail coinciding with the rotating center line of the mounting frame; and a sliding mounting seat for slidably connecting with the guide rail is arranged on the mounting frame corresponding to the guide rail.

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