CN113311067A - Detection and evaluation method for tightness consistency of film coiled material - Google Patents
Detection and evaluation method for tightness consistency of film coiled material Download PDFInfo
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- CN113311067A CN113311067A CN202110464720.3A CN202110464720A CN113311067A CN 113311067 A CN113311067 A CN 113311067A CN 202110464720 A CN202110464720 A CN 202110464720A CN 113311067 A CN113311067 A CN 113311067A
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- knocking
- coiled material
- tightness
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- film coiled
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/04—Analysing solids
- G01N29/045—Analysing solids by imparting shocks to the workpiece and detecting the vibrations or the acoustic waves caused by the shocks
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/02—Indexing codes associated with the analysed material
- G01N2291/023—Solids
- G01N2291/0237—Thin materials, e.g. paper, membranes, thin films
Abstract
The invention discloses a method for detecting and evaluating the tightness consistency of a film coiled material. The detection and evaluation method has the advantages of simplicity, rapidness, easiness in implementation and high reliability, can effectively detect the tightness consistency of the film coiled material, and is favorable for improving the production efficiency.
Description
Technical Field
The invention relates to the technical field of films, in particular to a method for detecting and evaluating the tightness consistency of a film coiled material.
Background
The degree of tightness of film coil material can't be judged through visual observation, often only after installing the machine with the coil material on, in process of production, because the coil material both ends elasticity is inconsistent and lead to rocking, just can discover the coil material both ends elasticity is inconsistent. In the production process, if the tightness degree of the two ends of the coiled material is greatly different, the tension is inconsistent, so that the flatness of the film is influenced, and the production efficiency is reduced. Therefore, the development of a simple and quick method for detecting and evaluating the tightness consistency of the film coiled material has very important significance.
Disclosure of Invention
Based on the technical problems in the background art, the invention provides a method for detecting and evaluating the tightness consistency of a film coiled material.
The invention provides a method for detecting and evaluating the tightness consistency of a film coiled material, which comprises the following steps: knocking the two ends of the film coiled material by using the knocking heads with the same strength, comparing decibels generated by knocking, and evaluating whether the tightness degrees of the two ends of the film coiled material are consistent.
Preferably, the method for detecting and evaluating the tightness consistency of the film coil comprises the following steps: and knocking two ends of the upper surface of the film coiled material by using a knocking head from a free falling body with the same height, comparing decibels generated by knocking, and evaluating whether the tightness degrees of the two ends of the film coiled material are consistent.
Preferably, the method for detecting and evaluating the tightness consistency of the film coil comprises the following steps: the method comprises the steps of setting two ends of the upper surface of a film coiled material as an A end and a B end respectively, determining a first test point at the A end, determining a second test point at the B end, knocking the first test point and the second test point from free falling bodies at the same height by using knocking heads respectively, comparing decibel sizes generated by knocking, and evaluating whether tightness degrees of the two ends of the film coiled material are consistent.
Preferably, assuming that the vertical distance between the first test point and the a-port is Sa and the vertical distance between the second test point and the B-port is Sb, Sa is Sb.
Preferably, the first test point and the second test point are located on a center line of the upper surface of the coiled material along the longitudinal direction.
Preferably, the method for detecting and evaluating the tightness consistency of the film coil comprises the following steps:
s1, preparing a free falling body testing device, wherein the free falling body testing device comprises an upright rod, a cross rod and a knocking head, the cross rod is fixedly arranged at the upper end of the upright rod and is vertical to the upright rod, and the knocking head is provided with a through hole which is in penetrating fit with the upright rod;
s2, vertically arranging the vertical rods of the free falling body testing device at two ends of the upper surface of the thin film coiled material respectively, lifting the knocking heads penetrating through the vertical rods until the tops of the knocking heads are in contact with the lower end of the cross rod, then loosening the knocking heads to enable the free falling bodies to fall, comparing decibel sizes generated when the knocking heads knock the thin film coiled material, and evaluating whether tightness degrees of two ends of the thin film coiled material are consistent.
Preferably, in the free fall testing device, the diameter of the stand rod is smaller than the diameter of the through hole of the knocking head; preferably, the cross rod and the vertical rod are in a cross structure; preferably, the cross rod and the vertical rod are in a cross structure; preferably, the diameter of the vertical rod is 1-1.4cm, and the diameter of the through hole of the knocking head is 1.1-1.5 cm; preferably, the knocking head is cylindrical, the diameter of the knocking head is 3-8cm, and the height of the knocking head is 5-15 cm; preferably, the distance between the lower end port of the cross rod and the bottom end port of the vertical rod is 30-40 cm; preferably, the diameter of the cross bar is 1-3 cm; preferably, the length of the vertical rod is 40-60 cm.
Preferably, the knocking head is made of wood.
Preferably, the decibel level of the tap is measured using a decibel meter.
Preferably, the criteria for assessing whether the degree of tightness at the ends of the film web is consistent are: if decibel sizes generated by knocking the two ends are close to or the same, the tightness degree of the two ends of the coiled material is consistent; if the decibel difference generated by knocking the two ends is large, the tightness degree of the two ends of the coiled material is inconsistent.
The invention has the following beneficial effects:
the invention provides a method for detecting and evaluating the tightness consistency of a film coiled material, wherein two ends of the film coiled material are knocked by knocking heads with the same strength, the tighter the coiled material is, the crisper the sound is, the louder the sound is, the looser the coiled material is, the louder the sound is, the smaller the sound is, whether the tightness of the two ends of the film coiled material is consistent or not can be evaluated by comparing the decibel generated by knocking the two ends of the coiled material, and if the decibel generated by knocking the two ends is close to or the same, the tightness of the two ends of the coiled material is consistent; if the decibel difference generated by knocking the two ends is large, the tightness degree of the two ends of the coiled material is inconsistent. Particularly, the invention also discloses that the coiled material is knocked by the knocking head in a free falling mode at the same height, so that the same strength of the knocking head to the coiled material is well ensured, and the reliability of a test result is improved; and the designed free falling body testing device can realize the same height of the free falling bodies of the knocking heads, ensure the reliability of a test result, and can control the weight and the falling height of the knocking heads by adjusting a proper size range, thereby avoiding the membrane material from being knocked out of the pit and eliminating the adverse effect on the product quality. The detection and evaluation method has the advantages of simplicity, rapidness, easiness in implementation and high reliability, can effectively detect the tightness consistency of the film coiled material, and is favorable for improving the production efficiency.
Drawings
Fig. 1 is a schematic view of a testing process of the method for detecting and evaluating tightness consistency of film coil.
Fig. 2 is a schematic diagram of a free fall testing device of the method for detecting and evaluating tightness consistency of film coil.
Detailed Description
The technical solution of the present invention will be described in detail below with reference to specific examples.
Example 1
A detection and evaluation method for tightness consistency of film coiled materials comprises the following steps: knocking the two ends of the film coiled material by using the knocking heads with the same strength, comparing decibels generated by knocking, and evaluating whether the tightness degrees of the two ends of the film coiled material are consistent.
Example 2
A detection and evaluation method for tightness consistency of film coiled materials comprises the following steps: and knocking two ends of the upper surface of the film coiled material by using a knocking head from a free falling body with the same height, comparing decibels generated by knocking, and evaluating whether the tightness degrees of the two ends of the film coiled material are consistent.
Example 3
A detection and evaluation method for tightness consistency of film coiled materials comprises the following steps: setting two ends of the upper surface of the film coiled material as an A end and a B end respectively, determining a first test point at the A end, determining a second test point at the B end, knocking the first test point and the second test point from free falling bodies at the same height by using knocking heads respectively, comparing decibel sizes generated by knocking, and evaluating whether tightness degrees of the two ends of the film coiled material are consistent;
if the vertical distance between the first test point and the port at the A end is Sa and the vertical distance between the second test point and the port at the B end is Sb, then Sa is Sb;
the first test point and the second test point are positioned on the middle line of the upper surface of the coiled material along the longitudinal direction.
Example 4
A detection and evaluation method for tightness consistency of film coiled materials comprises the following steps:
s1, preparing a free falling body testing device, wherein the free falling body testing device comprises an upright rod 1, a cross rod 2 and a knocking head 3, the cross rod 2 is fixedly arranged at the upper end of the upright rod 1 and is vertical to the upright rod 1, and the knocking head 3 is provided with a through hole which is in penetrating fit with the upright rod 1;
s2, setting two ends of the upper surface of the film coiled material as an A end and a B end respectively, determining a first test point at the A end, determining a second test point at the B end, vertically placing a vertical rod 1 of the free fall testing device at the first test point and the second test point respectively, lifting a knocking head 3 penetrating through the vertical rod 1 until the top of the knocking head 3 is contacted with the lower end of a cross rod 2, then loosening the knocking head 3 to enable the knocking head to freely fall, detecting a decibel value generated when the knocking head 3 knocks the film coiled material by using a decibel meter, comparing the decibel value measured by the first test point with the decibel value measured by the second test point, and evaluating whether the tightness degrees of the two ends of the film coiled material are consistent;
if the vertical distance between the first test point and the port at the A end is Sa and the vertical distance between the second test point and the port at the B end is Sb, then Sa is Sb;
the first test point and the second test point are positioned on the middle line of the upper surface of the coiled material along the longitudinal direction;
in the free falling body testing device, a cross-shaped structure is formed by a cross rod 2 and an upright rod 1, the diameter of the upright rod 1 is 1cm, the diameter of a through hole of a knocking head 3 is 1.1cm, the knocking head 3 is cylindrical, the diameter is 5cm, the height is 10cm, the distance between a lower end port of the cross rod 2 and a bottom end port of the upright rod 1 is 35cm, the diameter of the cross rod 2 is 1.5cm, and the length of the upright rod 1 is 40 cm.
The film web samples 1-5 were tested as described above and the results are shown in table 1:
TABLE 1 film coil tightness consistency test results
| First test point decibel value (dB) | Decibel value (dB) of the second | |
| Sample | ||
| 1 | 70 | 62 |
| |
70 | 70 |
| |
71 | 71 |
| Sample No. 4 | 72 | 70 |
| Sample No. 5 | 78 | 76 |
As can be seen from Table 1, the difference between the knock decibels of the two ends of the coiled material of the sample 1 is large, which indicates that the consistency of the tightness of the two ends of the coiled material of the sample 1 is poor; the knocking decibels at the two ends of the coiled material of the samples 2-5 are the same or close, and the tightness consistency at the two ends of the coiled material of the samples 2-5 is good.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (8)
1. A detection and evaluation method for the tightness consistency of a film coil is characterized by comprising the following steps: knocking the two ends of the film coiled material by using the knocking heads with the same strength, comparing decibels generated by knocking, and evaluating whether the tightness degrees of the two ends of the film coiled material are consistent.
2. The method for detecting and evaluating the tightness consistency of a film web according to claim 1, comprising the steps of: and knocking two ends of the upper surface of the film coiled material by using a knocking head from a free falling body with the same height, comparing decibels generated by knocking, and evaluating whether the tightness degrees of the two ends of the film coiled material are consistent.
3. The method for detecting and evaluating the tightness consistency of a film web according to claim 1 or 2, characterized by comprising the following steps: the method comprises the steps of setting two ends of the upper surface of a film coiled material as an A end and a B end respectively, determining a first test point at the A end, determining a second test point at the B end, knocking the first test point and the second test point from free falling bodies at the same height by using knocking heads respectively, comparing decibel sizes generated by knocking, and evaluating whether tightness degrees of the two ends of the film coiled material are consistent.
4. The method of claim 3, wherein the vertical distance between the first test point and the end A is Sa, and the vertical distance between the second test point and the end B is Sb, then Sa is Sb.
5. The method of claim 3 or 4, wherein the first test point and the second test point are located on a centerline of the web top surface along the longitudinal direction.
6. A method for testing and evaluating the tightness of a film web according to any of claims 2-5 comprising the steps of:
s1, preparing a free falling body testing device, wherein the free falling body testing device comprises an upright rod, a cross rod and a knocking head, the cross rod is fixedly arranged at the upper end of the upright rod and is vertical to the upright rod, and the knocking head is provided with a through hole which is in penetrating fit with the upright rod;
s2, vertically arranging the vertical rods of the free falling body testing device at two ends of the upper surface of the thin film coiled material respectively, lifting the knocking heads penetrating through the vertical rods until the tops of the knocking heads are in contact with the lower end of the cross rod, then loosening the knocking heads to enable the free falling bodies to fall, comparing decibel sizes generated when the knocking heads knock the thin film coiled material, and evaluating whether tightness degrees of two ends of the thin film coiled material are consistent.
7. The method for detecting and evaluating the tightness consistency of the film coiled material according to claim 6, wherein in the free fall testing device, the diameter of the stand rod is less than the diameter of the through hole of the knocking head; preferably, the cross rod and the vertical rod are in a cross structure; preferably, the diameter of the vertical rod is 1-1.4cm, and the diameter of the through hole of the knocking head is 1.1-1.5 cm; preferably, the knocking head is cylindrical, the diameter of the knocking head is 3-8cm, and the height of the knocking head is 5-15 cm; preferably, the distance between the lower end port of the cross rod and the bottom end port of the vertical rod is 30-40 cm; preferably, the diameter of the cross bar is 1-3 cm; preferably, the length of the vertical rod is 40-60 cm.
8. The method for detecting and evaluating the tightness consistency of a film coil according to any one of claims 1 to 7, wherein the knocking head is made of wood.
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| US20120151989A1 (en) * | 2010-12-17 | 2012-06-21 | The Gates Corporation | Nondestructive Test For Flexible Composites |
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2021
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| US5404755A (en) * | 1992-04-10 | 1995-04-11 | Olson Engineering, Inc. | Scanning apparatus and method for non-destructive materials evaluation and mapping through use of acoustic waves |
| JP2000131196A (en) * | 1998-10-23 | 2000-05-12 | Mitsubishi Electric Corp | Device for inspecting looseness of ripple spring of generator |
| US20120151989A1 (en) * | 2010-12-17 | 2012-06-21 | The Gates Corporation | Nondestructive Test For Flexible Composites |
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