A one-way breathable membrane air permeability testing device and a one-way breathable membrane air permeability testing method

Abstract

The present invention discloses a test device for the air permeability of a one-way breathable membrane, comprising a mold platform, a breathable through hole for placing a test component on the mold platform, a first adhesive layer and a second adhesive layer arranged at intervals on the outer peripheral surface of the first adhesive layer on the outer peripheral surface of the breathable through hole, a downward pressing device is also provided on the mold platform, the bottom of the breathable through hole is connected to a vacuum device through a connecting pipe, and also includes a vacuum component with a vacuum tube. The present invention also discloses a test method for the test device for the air permeability of a one-way breathable membrane, and the beneficial effects of the present invention are: the present invention is simple and convenient, easy to disassemble, and simple to operate.

Description

Technical Field

[0001] The invention relates to the technical field of air permeability testing, and in particular to a testing device and a testing method for the air permeability of a one-way air permeable membrane. Background Art

[0002] The one-way breathable membrane is characterized by being breathable, water-repellent and oil-repellent, and is mainly used in the vacuum infusion process of composite material molding. However, the breathable membrane needs to be tested for its air permeability during production and application. However, there is currently a lack of such a breathable membrane air permeability detection device to realize the air permeability detection of the breathable membrane. Therefore, the present application proposes a breathable membrane air permeability testing device to test the air permeability of the breathable membrane. Summary of the invention

[0003] One of the technical problems to be solved by the present invention is to provide a device for testing the air permeability of a one-way air permeable membrane which is simple to operate and easy to disassemble.

[0004] The second technical problem to be solved by the present invention is to provide a testing method for a testing device of the air permeability of a one-way air permeable membrane.

[0005] The technical problem solved by the present invention can be achieved by adopting the following technical solutions:

[0006] A testing device for the air permeability of a one-way breathable membrane, characterized in that it includes a mold platform, on which is provided an air permeable through hole for placing a test component, on the outer peripheral surface of the air permeable through hole is provided a first adhesive layer and a second adhesive layer spaced apart on the outer peripheral surface of the first adhesive layer, on the mold platform is also provided a downward pressing device, the bottom of the air permeable through hole is connected to a vacuum device via a connecting pipe, and also includes a vacuum component with a vacuum tube.

[0007] In a preferred embodiment of the present invention, the test assembly includes a first guide net laid on the upper part of the air permeable hole and a one-way breathable membrane laid on the first guide net and connected to the first adhesive layer, and an air-permeable felt, a second guide net and a vacuum bag are laid on the one-way breathable membrane in sequence, and the vacuum bag is connected to the second adhesive layer.

[0008] In a preferred embodiment of the present invention, the downward pressing device includes a bracket arranged on the mold platform, a pressing slide bar arranged on the bracket, and a pressing plate fixed at one end of the pressing slide bar.

[0009] In a preferred embodiment of the present invention, the vacuum device includes a vacuum tank connected to the connecting pipe and a pressure gauge arranged on the vacuum tank, and the top of the vacuum tank and the bottom of the air permeable hole are respectively provided with anti-backflow joints connected to both ends of the connecting pipe.

[0010] In a preferred embodiment of the present invention, the vacuum component is a vacuum pump, one end of the vacuum tube is connected to the vacuum pump, and the other end of the vacuum tube is provided with a guide net.

[0011] In a preferred embodiment of the present invention, the connecting pipe is a stainless steel vacuum tube.

[0012] A method for testing the air permeability of a one-way breathable membrane using the device for testing the air permeability of a one-way breathable membrane according to any of the above technical solutions, characterized in that it comprises the following steps:

[0013] 1) Clean the mold platform and use wiping paper to remove dust, glass fiber and other debris on the surface of the mold platform;

[0014] 2) Lay the first guide net on the air-permeable through hole of the mold platform, and ensure that the first guide net is located at the center of the air-permeable through hole;

[0015] 3) Laying the one-way breathable membrane on the first guide net and connecting it to the first adhesive layer, and pressing it down by a downward pressing device,

[0016] 4) A breathable felt and a second guide net are sequentially laid on the one-way breathable membrane;

[0017] 5) A vacuum film is laid on the second guide net and connected to the second adhesive layer, and a docking hole is left in the vacuum film;

[0018] 6) Insert one end of the vacuum tube of the vacuum component into the docking hole of the vacuum membrane and seal the docking hole with sealing tape.

[0019] 7) Start the vacuum pump, so that the value of the pressure gauge drops from the first predetermined value to the second predetermined value and the third predetermined value respectively, and record the time;

[0020] 8) When the value drops to the second preset value, turn off the vacuum pump and fold the vacuum tube, then record the change of the value during the measurement time. If the value change is less than the specified value, the test is valid, otherwise the test is invalid.

[0021] In a preferred embodiment of the present invention, the first predetermined value, the second predetermined value and the third predetermined value are 900 mbar, 50 mbar and 20 mbar respectively.

[0022] In a preferred embodiment of the present invention, the measuring time is 2 minutes.

[0023] In a preferred embodiment of the present invention, the prescribed value is 5 mbar.

[0024] Due to the adoption of the above technical solution, the beneficial effects of the present invention are: the present invention is simple and convenient, easy to disassemble and easy to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 It is a structural schematic diagram of the present invention.

[0027] Figure 2 It is the first working state diagram of the present invention.

[0028] Figure 3 It is a second working state diagram of the present invention. DETAILED DESCRIPTION

[0029] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below.

[0030] See also Figures 1 to 3 A test device for the air permeability of a one-way breathable membrane is shown, comprising a mold platform 10, a breathable through hole 11 for placing a test component 20 is provided on the mold platform 10, a first adhesive layer 30 and a second adhesive layer 40 arranged at intervals on the outer peripheral surface of the first adhesive layer 30 are provided on the outer peripheral surface of the breathable through hole 11, a downward pressing device 50 is also provided on the mold platform 10, the bottom of the breathable through hole 11 is connected to a vacuum device 60 through a connecting pipe 1, and a vacuum component 70 with a vacuum tube 71 is also included, the vacuum component 70 is preferably a vacuum pump, one end 71a of the vacuum tube 71 is connected to the vacuum pump 70, and the other end 71b of the vacuum tube 71 is provided with a guide net 72. The connecting tube 1 in this embodiment is preferably a stainless steel vacuum tube.

[0031] The test assembly 20 includes a first guide net 21 laid on the upper part of the air permeable hole 11 and a one-way air permeable membrane 22 laid on the first guide net 21 and connected to the first adhesive layer 30, and an air felt 23, a second guide net 24 and a vacuum bag 25 are also laid on the one-way air permeable membrane 22, and the vacuum bag 25 is connected to the second adhesive layer 40.

[0032] The downward pressing device 50 includes a bracket 51 disposed on the mold platform 10, a pressing slide bar 52 disposed on the bracket 51, and a pressing plate 53 fixed to one end of the pressing slide bar 52. When the first guide net 21 and the one-way breathable membrane 22 are laid on the breathable through hole 11, the other end of the pressing slide bar 52 is manually lifted, so that the pressing slide bar 52 is pressed from top to bottom through the pressing plate 53 at one end of the pressing slide bar to bond the one-way breathable membrane 22 to the first adhesive layer 30 for sealing. When the second guide net 23, the breathable felt 24, and the vacuum bag 25 are laid on the one-way breathable membrane 22, the operation is the same as above for sealing.

[0033] The vacuum device 60 includes a vacuum tank 61 connected to the connecting pipe 1 and a pressure gauge 62 arranged on the vacuum tank 61. The top of the vacuum tank 61 and the bottom of the air permeable hole 11 are respectively provided with anti-backflow joints 61a and 11a connected to the two ends of the connecting pipe 1.

[0034] A method for testing the air permeability of a one-way breathable membrane using the device for testing the air permeability of a one-way breathable membrane according to any of the above technical solutions comprises the following steps:

[0035] 1) Clean the mold platform and use wiping paper to remove dust, glass fiber and other debris on the surface of the mold platform;

[0036] 2) Lay the first guide net cut to 80×60 mm on the ventilation hole of the mold platform, ensuring that the first guide net of 80×60 mm is located at the center of the ventilation hole;

[0037] 3) Lay the one-way breathable film cut to 120×100mm on the first guide net of 80×60mm and connect it to the first adhesive layer of 100×100mm, and press it down by the downward pressing device.

[0038] 4) A 200×200mm breathable felt and a 200×200mm second guide net are laid on the 120×100mm one-way breathable membrane in sequence;

[0039] 5) A vacuum film is laid on the second guide net of 200×200 mm and connected to the second adhesive layer, so that the vacuum film is tightly sealed and a docking hole is left in the vacuum film;

[0040] 6) Insert one end of the vacuum tube of the vacuum component into the docking hole of the vacuum membrane and seal the docking hole with sealing tape.

[0041] 7) Start the vacuum pump to make the value of the barometer drop from the first predetermined value of 900 mpar to the second predetermined value of 50 mbar and the third predetermined value of 20 mbar respectively, and record the time;

[0042] 8) When the value drops to the second predetermined value of 50 mbar, turn off the vacuum pump and fold the vacuum tube, then record the change of the value during the measurement time. If the value change is less than the specified value, the test is valid, otherwise the test is invalid. In this embodiment, the measurement time is 2 minutes and the specified value is 5 mbar.

[0043] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A test device for the air permeability of a one-way breathable membrane, It is characterized in that The invention comprises a mold platform, on which a ventilating through hole for placing a test component is arranged, on the outer peripheral surface of the ventilating through hole a first adhesive layer and a second adhesive layer arranged at intervals on the outer peripheral surface of the first adhesive layer are arranged, and on the mold platform a downward pressing device is also arranged, the bottom of the ventilating through hole is connected to a vacuum device through a connecting pipe, and also comprises a vacuum component with a vacuum tube; the test component comprises a first guide net laid on the upper part of the ventilating through hole and a one-way air-permeable membrane laid on the first guide net and connected to the first adhesive layer, an air-permeable felt and a second guide net and a vacuum membrane are laid on the one-way air-permeable membrane in sequence, and the vacuum membrane is connected to the second adhesive layer; The downward pressing device includes a bracket arranged on the mold platform, a pressing slide bar arranged on the bracket, and a pressure plate fixed at one end of the pressing slide bar; when the first guide net and the one-way breathable membrane are laid on the breathable through hole, the other end of the pressing slide bar is manually lifted up, so that the pressing slide bar is bonded to the first adhesive layer from top to bottom through the pressure plate at one end of the pressing slide bar for sealing; when the second guide net and the vacuum membrane are laid on the one-way breathable membrane, the other end of the pressing slide bar is manually lifted up, so that the pressing slide bar is bonded to the second adhesive layer from top to bottom through the pressure plate at one end of the pressing slide bar for sealing.

2. A one-way breathable membrane air permeability testing device as claimed in claim 1, It is characterized in that The vacuum device includes a vacuum tank connected to the connecting pipe and a pressure gauge arranged on the vacuum tank. The top of the vacuum tank and the bottom of the air-permeable through hole are respectively provided with anti-backflow joints connected to the two ends of the connecting pipe.

3. A one-way breathable membrane air permeability testing device as claimed in claim 1, It is characterized in that The vacuum component is a vacuum pump, one end of the vacuum tube is connected to the vacuum pump, and the other end of the vacuum tube is provided with a guide net.

4. A one-way breathable membrane air permeability testing device as claimed in claim 1, It is characterized in that The connecting pipe is a stainless steel vacuum tube.

5. A testing method using the one-way breathable membrane air permeability testing device according to claim 3 or 4, It is characterized in that The following steps are involved: 1) Clean the mold platform and remove the dust and glass fiber on the surface of the mold platform with wiping paper; 2) Lay the first guide net on the air-permeable through hole of the mold platform, and ensure that the first guide net is located at the center of the air-permeable through hole; 3) Laying the one-way breathable membrane on the first guide net and connecting it to the first adhesive layer, and pressing it down by a downward pressing device, 4) A breathable felt and a second guide net are sequentially laid on the one-way breathable membrane; 5) A vacuum film is laid on the second guide net and connected to the second adhesive layer, and a docking hole is left in the vacuum film; 6) Insert one end of the vacuum tube of the vacuum component into the docking hole of the vacuum membrane and seal the docking hole with sealing tape. 7) Start the vacuum pump, so that the value of the pressure gauge drops from the first predetermined value to the second predetermined value and the third predetermined value respectively, and record the time; 8) When the value drops to the second preset value, turn off the vacuum pump and fold the vacuum tube, then record the change of the value during the measurement time. If the value change is less than the specified value, the test is valid, otherwise the test is invalid.

6. The testing method using a one-way breathable membrane air permeability testing device as claimed in claim 5, It is characterized in that The first predetermined value, the second predetermined value and the third predetermined value are 900 mbar, 50 mbar and 20 mbar.

7. The testing method using a one-way breathable membrane air permeability testing device as claimed in claim 6, It is characterized in that The measuring time is 2 minutes.

8. The testing method using a one-way breathable membrane air permeability testing device as claimed in claim 6, It is characterized in that The specified value is 5 mbar.

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