Online testing device for air permeability of porous isolating membrane

Abstract

The utility model discloses a porous isolating membrane air permeability on-line testing device which is characterized by comprising a device body, at least one negative pressure roller structure is arranged on a porous isolating membrane movement path of the device body; a hollow roller body provided with a plurality of detection air holes is arranged outside the negative pressure roller structure; a gas guide branch pipe connected with an external negative pressure device is arranged at the position, corresponding to the detection gas hole, in the hollow roller body, and a gas flow sensor is arranged at the gas guide branch pipe; when the detection air hole is covered by the hole isolating membrane, the air flow is converted into negative pressure data to reflect the air permeability of the hole isolating membrane in the corresponding area.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of perforated release film manufacturing, and particularly relates to a perforated release film air permeability on-line testing device. BACKGROUND

[0002] Perforated release film is obtained by processing release film through needle roller heat piercing process. Its air permeability is associated with many complex factors, such as the relative position of the needle roller and the release film, the temperature of the needle roller, and the line speed of the production equipment.

[0003] In the field of glass fiber and carbon fiber composite material preparation, perforated release film is frequently used. When the product is vacuumized, it plays a role of air guide; in the pouring process, it is a channel for resin to enter the main material; after curing, it can let the excess resin overflow. The pore size of the perforated release film is crucial. If the pore size is too small, it will affect the air guide rate, the glue feeding rate and the glue overflow amount; if the pore size is too large, it is easy to appear the phenomenon of adhesion and lead to the difficulty of product demolding. Therefore, air permeability is one of the key indicators affecting product performance.

[0004] At present, air permeability testing mostly adopts offline detection, that is, after production is completed, the sample is tested separately. However, offline detection has some problems: first, the detection efficiency is low, and the quality change in the production process cannot be monitored in real time; second, the detection result has a lag, and it is difficult to adjust the production process in time. Based on this, it has important practical significance to develop a device that can on-line and real-time detect the air permeability of perforated release film. UTILITY MODEL CONTENT

[0005] In order to overcome the above-mentioned defects of the prior art, the purpose of the utility model is to provide a perforated release film air permeability on-line testing device.

[0006] The perforated release film to be detected can record periodic negative pressure data after passing through the negative pressure roller provided in the device of the utility model, which is used to reflect the air permeability of the perforated release film in the corresponding area.

[0007] In order to achieve the purpose of the utility model, the technical scheme adopted is:

[0008] A perforated release film air permeability on-line testing device comprises:

[0009] A device body, at least one negative pressure roller structure is arranged on the motion path of the perforated release film of the device body;

[0010] The outer part of the negative pressure roller structure is a hollow roller body provided with a plurality of detection air holes;

[0011] A gas guide branch pipe connected with the external negative pressure device is arranged at the position corresponding to the detection gas hole in the hollow roller body, and a gas flow sensor is arranged at the gas guide branch pipe;

[0012] When the detection gas hole is covered by the hole isolation film, the gas flow is converted into negative pressure data to reflect the air permeability of the hole isolation film in the corresponding area.

[0013] In a preferred embodiment of the present application, the gas guide branch pipe merges into a connecting air pipe, and the connecting air pipe is connected with the external negative pressure device.

[0014] In a preferred embodiment of the present application, the device body comprises a first supporting member and a second supporting member, and the first end of the negative pressure roller structure is guided and supported by the first supporting member.

[0015] The second end of the negative pressure roller structure is guided and supported by the second supporting member.

[0016] In a preferred embodiment of the present application, the device body further comprises a first guide roller arranged at the front end of the film entering position of the negative pressure roller structure and a second guide roller arranged at the rear end of the film exiting position of the negative pressure roller structure.

[0017] In a preferred embodiment of the present application, the diameter of the hollow roller body in the negative pressure roller structure is greater than the diameter of the first guide roller.

[0018] In a preferred embodiment of the present application, the diameter of the hollow roller body in the negative pressure roller structure is greater than the diameter of the second guide roller.

[0019] In a preferred embodiment of the present application, the roller cores of the negative pressure roller structure, the first guide roller and the second guide roller are not arranged on the same straight line.

[0020] In a preferred embodiment of the present application, the opening area of the detection gas hole ranges from 5 to 10 square centimeters.

[0021] The present application has the following beneficial effects:

[0022] The air permeability of the hole isolation film can be detected online, and the production process can be evaluated and adjusted in time. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 The overall structure of the present application is shown Figure 1 .

[0024] Figure 2 The overall structure of the present application is shown Figure 2 .

[0025] Figure 3 This is a schematic diagram of the negative pressure roller structure of this utility model. Figure 1 .

[0026] Figure 4 This is a schematic diagram of the negative pressure roller structure of this utility model. Figure 2 . Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. However, it should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit its scope. Furthermore, in the following descriptions, well-known structures and technologies have been omitted to avoid unnecessary confusion regarding the concept of this utility model.

[0028] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, terms such as "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0029] like Figures 1-4 The device shown is an online testing device for the air permeability of a porous isolation membrane, which includes a device body and a negative pressure roller structure 20 arranged on the movement path of the porous isolation membrane 1 of the device body 10.

[0030] Key points combined Figures 3-4 The negative pressure roller structure 10 has a hollow roller body 21 with several detection air holes 211 on the outside.

[0031] The device body 10 includes a first support member 11 and a second support member 12. The first support member 11 provides guidance and support to the first end of the negative pressure roller structure 20, and the second support member 12 provides guidance and support to the second end of the negative pressure roller structure 20.

[0032] In this embodiment, the first support member 11 includes an upright plate 111 and a base 112 supporting the upright plate 111, and is made of hard steel plate.

[0033] In this embodiment, the second support member 12 includes an upright plate 121 and a base 122 supporting the upright plate 121, and is made of hard steel plate.

[0034] Key points combined Figure 2The device body 10 further comprises a first guide roller 13 arranged at the front end of the film entry position of the negative pressure roller structure 20 and a second guide roller 14 arranged at the rear end of the film exit position of the negative pressure roller structure 20.

[0035] The diameter of the hollow roller body 21 in the negative pressure roller structure 20 is greater than the diameter of the first guide roller 13 and the diameter of the hollow roller body 21 in the negative pressure roller structure 20 is greater than the diameter of the second guide roller 14.

[0036] The roller cores of the negative pressure roller structure 20, the first guide roller 13 and the second guide roller 14 are not arranged on the same straight line, and the three rollers rotate at a linear speed controlled by an external device.

[0037] Such an arrangement is because the first guide roller 13 or the second guide roller 14 is used to adjust the wrap angle surface 101 between the negative pressure roller structure 20 and the porous isolation film 1, so that the wrap angle surface 101 can cover the detection gas hole 211 on the hollow roller body 21 outside the negative pressure roller structure 20.

[0038] A gas guide branch pipe 22 connected with the external negative pressure device 30 is arranged at the position corresponding to the detection gas hole 211 in the hollow roller body 21, and specifically, the gas guide branch pipe 22 merges into a connecting gas pipe 23 connected with the external negative pressure device 30.

[0039] The gas flow sensor 221 corresponding to the detection gas hole 211 is arranged at the gas guide branch pipe 22. Figure 4

[0040] When the detection gas hole 211 is covered by the porous isolation film 1, the gas flow is converted into negative pressure data to reflect the air permeability of the corresponding area of the porous isolation film 1.

[0041] The utility model can measure the gas flow when the gas passes through the porous isolation film 1 in real time, the data acquisition card collects the sensor signal and transmits it to the computer for recording.

[0042] The opening area of the detection gas hole 211 is generally set to 5-10 square centimeters, and when the porous isolation film 1 does not cover the detection gas hole 211, the recorded gas flow is the largest.

[0043] When the porous isolation film 1 covers the detection gas hole 211, the flow becomes smaller, and when it is completely covered, the flow is the smallest, that is, the gas permeation amount of the area.

[0044] The data can reflect the air permeability of the porous isolation film 1, and further reflect whether the size of the punched hole of the porous isolation film is suitable, so as to facilitate the improvement and debugging of the production process according to the actual parameter requirements.

[0045] The basic principle and main features of the utility model and the advantages of the utility model are shown and described above.​

[0046] Those skilled in the art should understand that the present application is not limited to the above embodiments, and the above embodiments and descriptions in the specification are only to illustrate the principles of the present application, and various changes and improvements can be made to the present application without departing from the spirit and scope of the present application, and these changes and improvements all fall within the scope of the claimed present application, and the scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. An online testing device for the air permeability of a porous insulating membrane, characterized in that, include: A device body, wherein at least one negative pressure roller structure is provided on the movement path of the perforated isolation membrane of the device body; The negative pressure roller structure is a hollow roller body with several detection air holes on the outside; A gas guide pipe connected to an external negative pressure device is provided in the hollow roller body at the position corresponding to the detection air hole, and a gas flow sensor is provided in the gas guide pipe. When the detection pores are covered by the porous isolation membrane, the gas flow rate is converted into negative pressure data to reflect the air permeability of the porous isolation membrane in the corresponding area.

2. The online testing device for the air permeability of a porous insulating membrane as described in claim 1, characterized in that, The air guide branch pipe merges into a connecting air pipe, which is connected to the external negative pressure device.

3. The online testing device for the air permeability of a porous insulating membrane as described in claim 1, characterized in that, The device body includes a first support member and a second support member, and the first support member provides guidance and support for the first end of the negative pressure roller structure. The second support member guides and supports the second end of the negative pressure roller structure.

4. The online testing device for the air permeability of a porous insulating membrane as described in claim 1, characterized in that, The device body also includes a first guide roller disposed at the front end of the film inlet position of the negative pressure roller structure and a second guide roller disposed at the rear end of the film outlet position of the negative pressure roller structure.

5. The online testing device for the air permeability of a porous insulating membrane as described in claim 4, characterized in that, The diameter of the hollow roller body in the negative pressure roller structure is larger than the diameter of the first guide roller.

6. The online testing device for the air permeability of a porous insulating membrane as described in claim 4, characterized in that, The diameter of the hollow roller body in the negative pressure roller structure is larger than the diameter of the second guide roller.

7. The online testing device for the air permeability of a porous insulating membrane as described in claim 1, characterized in that, The negative pressure roller structure and the roller core of the first guide roller or the second guide roller are not arranged on the same straight line.

8. The online testing device for the air permeability of a porous insulating membrane as described in claim 1, characterized in that, The range of the pore opening area is 5-10 square centimeters.

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