Undersea high-pressure air bag forming method

Abstract

The invention discloses an undersea high-pressure air bag forming method which comprises the following steps: a mold core manufacturing step: stirring a soluble adhesive and filler, and putting the stirred filler into a mold for mold core forming; a channel processing step: punching the formed mold core to form a channel with a loop in the mold core; and an inner layer weaving step: weaving carbon fibers on the outer wall of the formed mold core, so that the mold core is completely wrapped by the carbon fibers. The carbon fiber braid layers are arranged on the inner layer and the outer layer of the rubber bag, so that the compression resistance of the manufactured air bag is better, the air bag can be used under the high-pressure sea, and then the compression resistance of the air bag is higher; the air bag can be made into a special shape according to requirements.

Description

Technical Field

[0001] The invention relates to the technical field of airbag processing, and in particular to an underwater high-pressure airbag forming method. Background Art

[0002] An airbag is a flexible rubber capsule that is usually filled with compressed air; the air is used to keep the airbag inflated, which in turn enables the airbag to provide buoyancy in water or to plug leaks.

[0003] Chinese patent application No. 201811392578.0 proposes a method for forming a special-shaped airbag, comprising the following steps: preparing a main body piece, a transition rubber strip and a heat-sealing rubber strip, wherein the main body piece, the inner rubber strip and / or the outer rubber strip can be bonded or heat-sealed or heat-sealed with the airbag skin material; fixing the first main body piece to the outer surface of the skin of the main airbag by gluing; fixing one end of the transition rubber strip to the first main body piece by heat-sealing, and heat-sealing the transition rubber strip and the main body piece at the heat-sealing position so that the front and back sides of the heat-sealing position are covered with the heat-sealing rubber strip; step 4, making the other end of the transition rubber strip dock with the edge of the skin of the auxiliary airbag, and heat-sealing at the docking position so that the heat-sealing rubber strip covers both the front and back sides of the docking position.

[0004] Chinese patent application No. 201811392578.0, a trapezoidal rubber sheet airbag molding method, belongs to the technical field of composite material product molding mold manufacturing, and solves the problem that the current trapezoidal rubber sheet airbag molding method is prone to poor fitting between the rubber sheet and the molding mold, deformation, uneven pressure, resulting in uneven wall thickness of the molded trapezoidal rubber sheet airbag, and the bonding edge is prone to warping and leakage. It includes the first step, preheating; the second step, laying the rubber sheet; the third step, negative pressure pressing; the fourth step, filling the end; the fifth step, closing the mold; the sixth step, negative pressure pressing; the seventh step, curing; the eighth step, opening the mold and trimming the shape.

[0005] When the airbag is used under the sea, it is necessary to make the airbag have a strong ability to resist high pressure. The current airbag has poor pressure bearing capacity and cannot meet the special high pressure use under the sea. Therefore, it is urgent to design a method for forming an underwater high-pressure airbag to solve the above problem. Summary of the invention

[0006] The object of the present invention is to provide a method for forming an underwater high-pressure airbag to solve the above-mentioned deficiencies in the prior art.

[0007] In order to achieve the above object, the present invention provides the following technical solutions:

[0008] A method for forming an underwater high-pressure airbag comprises the following steps:

[0009] The steps of making the mold core are as follows: a soluble adhesive is used to mix with a filler, and the mixed filler is put into a mold to form the mold core;

[0010] Channel processing step: punching the formed mold core to form a channel with a loop inside the mold core;

[0011] Weaving inner layer step: using carbon fiber to weave the outer wall of the mold core after forming, so that the carbon fiber completely wraps the mold core;

[0012] Rubber wrapping step: the mixed rubber is evenly wrapped on the outside of the mold core to form a rubber bag on the outside of the mold core, and then the mold core is placed in a prefabricated outer mold, and the air in the channel is extracted, and at the same time, the inside of the outer mold is pressurized to maintain a pressure difference between the inside and outside of the rubber bag for a period of time;

[0013] Weaving outer layer step: using carbon fiber to weave the outer wall of the rubber bag so that the carbon fiber completely wraps the rubber bag;

[0014] Vulcanization step: vulcanize the rubber bag in a vulcanizer and take it out after the rubber bag is completely vulcanized;

[0015] Mold dissolving step: inject solvent into the interior of the channel for flushing. After the mold core is completely dissolved, clean the filler inside the rubber bag and bond it to the metal frame plate to obtain a high-pressure air bag.

[0016] Furthermore, in the core making step, the soluble adhesive is a modified starch adhesive, the filler is sodium silicate, and the ratio of the soluble adhesive to the filler is 1.5:10.

[0017] Furthermore, in the channel processing step, the number of holes on the surface of the core is 4-8, and each hole is connected to the channel.

[0018] Furthermore, in the step of weaving the inner layer, the number of layers of the carbon fiber weaving is 3-5 layers, and adhesive is applied after each layer is weaved.

[0019] Furthermore, in the rubber wrapping step, the thickness of the rubber bag is 1-20 mm, the pressure inside the rubber bag is 20-50 kPa, and the pressure outside the rubber bag is 150-200 kPa.

[0020] Furthermore, in the step of weaving the outer layer, the number of layers of the carbon fiber weaved in the outer layer is 4-6 layers, and adhesive is applied after each layer is weaved.

[0021] Furthermore, in the vulcanization step, the pressure during vulcanization is 290-380 kPa, and the temperature during vulcanization is 130° C.-160° C.

[0022] Furthermore, in the mold dissolving step, the solvent is clean water, and the pressure of the clean water flushing is 100-140 kPa.

[0023] In the above technical scheme, the present invention provides a method for forming an underwater high-pressure airbag, which has the following beneficial effects: the present invention arranges carbon fiber woven layers on both the inner and outer layers of the rubber bag, so that the manufactured airbag has better pressure resistance, and can be used under high pressure in the sea, thereby making the airbag more resistant to pressure, and adopts a soluble adhesive and a filler to make a mold core, which not only enables the airbag to be made into a special shape according to demand, but also allows the mold core to be removed by dissolution without damaging the inner woven layer of the airbag, so that the airbag is formed as a whole without splicing, which not only saves the splicing process, but also improves the overall performance of the airbag; the airbag is formed by the cooperation of the outer mold and the mold core, achieving the effect of uniform wall thickness of the airbag, and applying positive pressure to the outside of the airbag and negative pressure to the inside of the airbag, so that the inner woven layer and the airbag are better combined. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0025] Figure 1 A flow chart is provided for an embodiment of an underwater high-pressure airbag forming method of the present invention. DETAILED DESCRIPTION

[0026] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0027] Example 1

[0028] An underwater high-pressure airbag forming method provided by an embodiment of the present invention comprises the following steps:

[0029] The steps of making the mold core are as follows: a soluble adhesive is used to stir the filler, and the stirred filler is put into the mold for mold core molding. The shape of the mold cavity is the same as the shape of the airbag to be made. The soluble adhesive is a modified starch adhesive. The modified starch adhesive is used to make the mold core dissolve by a solvent. The filler is sodium silicate, and the ratio of the soluble adhesive to the filler is 1.5:10. The appropriate ratio makes the mold core not easy to collapse and easy to dissolve.

[0030] Channel processing step: punching holes in the molded core to form a channel with a loop inside the core, introducing a solvent into the channel so that the solvent can dissolve the core, the number of holes on the core surface is 8, and each hole is connected to the channel, so that when the air in the channel is extracted, the holes on the core surface can form a negative pressure;

[0031] Inner layer weaving step: carbon fiber is used to weave the outer wall of the mold core after forming, so that the carbon fiber completely wraps the mold core. The carbon fiber is used as the inner layer of the airbag, so that the airbag can be used under high pressure under the sea without being easily damaged. The number of carbon fiber weaving layers is 3, and each layer is coated with adhesive after weaving. The adhesive is chloroprene rubber glue. Neoprene rubber glue has good stability to oxygen, ozone, ultraviolet rays, gas, etc., so that the bonding performance of the braided layer and the airbag is better;

[0032] Rubber wrapping step: wrap the mixed rubber evenly on the outside of the mold core to form a rubber bag on the outside of the mold core. When wrapping, reserve a nozzle hole for the air bag, and the nozzle hole corresponds to the channel. Then put the mold core into the prefabricated outer mold, and extract the air in the channel. At the same time, pressurize the inside of the outer mold to keep the pressure difference between the inside and outside of the rubber bag for a period of time. The thickness of the rubber bag is 8mm, the pressure inside the rubber bag is 20kPa, and the pressure outside the rubber bag is 150kPa. The pressure inside and outside the rubber bag is absolute pressure. Positive pressure is applied to the outside of the air bag, and negative pressure is applied to the inside of the air bag, so that the inner braided layer and the air bag are better combined.

[0033] Weaving outer layer step: carbon fiber is used to weave the outer wall of the rubber bag so that the carbon fiber completely wraps the rubber bag. The number of carbon fiber weaving layers on the outer layer is 4. Adhesive is applied to each layer after weaving. The outer layer of the airbag is woven by carbon fiber to make the airbag more resistant to high pressure. After the outer braided layer of the airbag is completed, a rubber protective layer resistant to seawater corrosion needs to be wrapped on the outside of the outer braided layer;

[0034] Vulcanization step: vulcanize the rubber bag in the vulcanizer, and take it out after the rubber bag is completely vulcanized. The pressure during vulcanization is 300kPa and the temperature during vulcanization is 150℃;

[0035] Mold dissolving step: introduce solvent into the interior of the channel for flushing. After the mold core is completely dissolved, clean the filler inside the rubber bag and bond it to the metal frame plate to obtain a high-pressure airbag. The solvent is clean water, and the pressure of the clean water flushing is 100-140kPa. The metal frame plate serves to bolt the airbag to the outside, and the metal frame plate has an inflation nozzle corresponding to the nozzle hole of the airbag, so that the airbag can be inflated.

[0036] Example 2

[0037] An underwater high-pressure airbag forming method provided by an embodiment of the present invention comprises the following steps:

[0038] The steps of making the mold core are as follows: a soluble adhesive is used to stir the filler, and the stirred filler is put into the mold for mold core molding. The shape of the mold cavity is the same as the shape of the airbag to be made. The soluble adhesive is a modified starch adhesive. The modified starch adhesive is used to make the mold core dissolve by a solvent. The filler is sodium silicate, and the ratio of the soluble adhesive to the filler is 1.5:10. The appropriate ratio makes the mold core not easy to collapse and easy to dissolve.

[0039] Channel processing step: punching holes in the molded core to form a channel with a loop inside the core, introducing a solvent into the channel so that the solvent can dissolve the core, the number of holes on the core surface is 8, and each hole is connected to the channel, so that when the air in the channel is extracted, the holes on the core surface can form a negative pressure;

[0040] Inner layer weaving step: carbon fiber is used to weave the outer wall of the mold core after molding, so that the carbon fiber completely wraps the mold core. The carbon fiber is used as the inner layer of the airbag, so that the airbag can be used under high pressure under the sea without being easily damaged. The number of carbon fiber weaving layers is 4, and each layer is coated with adhesive after weaving. The adhesive is chloroprene rubber glue. Neoprene rubber glue has good stability to oxygen, ozone, ultraviolet rays, gas, etc., so that the bonding performance of the braided layer and the airbag is better;

[0041] Rubber wrapping step: wrap the mixed rubber evenly on the outside of the mold core to form a rubber bag on the outside of the mold core. When wrapping, reserve a nozzle hole for the air bag, and the nozzle hole corresponds to the channel. Then put the mold core into the prefabricated outer mold, and extract the air in the channel. At the same time, pressurize the inside of the outer mold to keep the pressure difference between the inside and outside of the rubber bag for a period of time. The thickness of the rubber bag is 8mm, the pressure inside the rubber bag is 20kPa, and the pressure outside the rubber bag is 150kPa. The pressure inside and outside the rubber bag is absolute pressure. Positive pressure is applied to the outside of the air bag, and negative pressure is applied to the inside of the air bag, so that the inner braided layer and the air bag are better combined.

[0042] Weaving outer layer step: carbon fiber is used to weave the outer wall of the rubber bag so that the carbon fiber completely wraps the rubber bag. The number of carbon fiber weaving layers on the outer layer is 4. Adhesive is applied to each layer after weaving. The outer layer of the airbag is woven by carbon fiber to make the airbag more resistant to high pressure. After the outer braided layer of the airbag is completed, a rubber protective layer resistant to seawater corrosion needs to be wrapped on the outside of the outer braided layer;

[0043] Vulcanization step: vulcanize the rubber bag in the vulcanizer, and take it out after the rubber bag is completely vulcanized. The pressure during vulcanization is 300kPa and the temperature during vulcanization is 150℃;

[0044] Mold dissolving step: introduce solvent into the interior of the channel for flushing. After the mold core is completely dissolved, clean the filler inside the rubber bag and bond it to the metal frame plate to obtain a high-pressure airbag. The solvent is clean water, and the pressure of the clean water flushing is 100-140kPa. The metal frame plate serves to bolt the airbag to the outside, and the metal frame plate has an inflation nozzle corresponding to the nozzle hole of the airbag, so that the airbag can be inflated.

[0045] Example 3

[0046] An underwater high-pressure airbag forming method provided by an embodiment of the present invention comprises the following steps:

[0047] The steps of making the mold core are as follows: a soluble adhesive is used to stir the filler, and the stirred filler is put into the mold for mold core molding. The shape of the mold cavity is the same as the shape of the airbag to be made. The soluble adhesive is a modified starch adhesive. The modified starch adhesive is used to make the mold core dissolve by a solvent. The filler is sodium silicate, and the ratio of the soluble adhesive to the filler is 1.5:10. The appropriate ratio makes the mold core not easy to collapse and easy to dissolve.

[0048] Channel processing step: punching holes in the molded core to form a channel with a loop inside the core, introducing a solvent into the channel so that the solvent can dissolve the core, the number of holes on the core surface is 8, and each hole is connected to the channel, so that when the air in the channel is extracted, the holes on the core surface can form a negative pressure;

[0049] Inner layer weaving step: carbon fiber is used to weave the outer wall of the mold core after forming, so that the carbon fiber completely wraps the mold core. The carbon fiber is used as the inner layer of the airbag, so that the airbag can be used under high pressure under the sea without being easily damaged. The number of carbon fiber weaving layers is 5, and each layer is coated with adhesive after weaving. The adhesive is chloroprene rubber glue. Neoprene rubber glue has good stability to oxygen, ozone, ultraviolet rays, gas, etc., so that the bonding performance of the braided layer and the airbag is better;

[0050] Rubber wrapping step: wrap the mixed rubber evenly on the outside of the mold core to form a rubber bag on the outside of the mold core. When wrapping, reserve a nozzle hole for the air bag, and the nozzle hole corresponds to the channel. Then put the mold core into the prefabricated outer mold, and extract the air in the channel. At the same time, pressurize the inside of the outer mold to keep the pressure difference between the inside and outside of the rubber bag for a period of time. The thickness of the rubber bag is 8mm, the pressure inside the rubber bag is 20kPa, and the pressure outside the rubber bag is 150kPa. The pressure inside and outside the rubber bag is absolute pressure. Positive pressure is applied to the outside of the air bag, and negative pressure is applied to the inside of the air bag, so that the inner braided layer and the air bag are better combined.

[0051] Weaving outer layer step: carbon fiber is used to weave the outer wall of the rubber bag so that the carbon fiber completely wraps the rubber bag. The number of carbon fiber weaving layers on the outer layer is 4. Adhesive is applied to each layer after weaving. The outer layer of the airbag is woven by carbon fiber to make the airbag more resistant to high pressure. After the outer braided layer of the airbag is completed, a rubber protective layer resistant to seawater corrosion needs to be wrapped on the outside of the outer braided layer;

[0052] Vulcanization step: vulcanize the rubber bag in the vulcanizer, and take it out after the rubber bag is completely vulcanized. The pressure during vulcanization is 300kPa and the temperature during vulcanization is 150℃;

[0053] Mold dissolving step: introduce solvent into the interior of the channel for flushing. After the mold core is completely dissolved, clean the filler inside the rubber bag and bond it to the metal frame plate to obtain a high-pressure airbag. The solvent is clean water, and the pressure of the clean water flushing is 100-140kPa. The metal frame plate serves to bolt the airbag to the outside, and the metal frame plate has an inflation nozzle corresponding to the nozzle hole of the airbag, so that the airbag can be inflated.

[0054] In the above-mentioned Example 1, Example 2 and Example 3, except for the different numbers of woven layers of the inner layer of the airbag, other conditions are the same. After testing, the airbag in Example 3 has the strongest pressure resistance, and the airbag in Example 1 has the weakest pressure resistance. However, they all meet the requirements for use in high-pressure environments under the sea, such as underwater salvage and plugging work. Therefore, airbags with different woven inner layers can be selected for use according to different usage scenarios.

[0055] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A method for forming an underwater high-pressure airbag, characterized in that: The following steps are involved: The steps of making the mold core are as follows: a soluble adhesive is used to mix with a filler, and the mixed filler is put into a mold to form the mold core; Channel processing step: punching the formed mold core to form a channel with a loop inside the mold core; Inner layer weaving step: carbon fiber is used to weave the outer wall of the mold core after forming, so that the carbon fiber completely wraps the mold core; Rubber wrapping step: the mixed rubber is evenly wrapped on the outside of the mold core to form a rubber bag on the outside of the mold core, and then the mold core is placed in a prefabricated outer mold, and the air in the channel is extracted, and at the same time, the inside of the outer mold is pressurized to maintain a pressure difference between the inside and outside of the rubber bag for a period of time; Weaving outer layer step: using carbon fiber to weave the outer wall of the rubber bag so that the carbon fiber completely wraps the rubber bag; Vulcanization step: vulcanize the rubber bag in a vulcanizer and take it out after the rubber bag is completely vulcanized; Mold dissolving step: inject solvent into the interior of the channel for flushing. After the mold core is completely dissolved, clean the filler inside the rubber bag and bond it to the metal frame plate to obtain a high-pressure air bag.

2. The method for forming an underwater high-pressure airbag according to claim 1, characterized in that: In the mold core making step, the soluble adhesive is a modified starch adhesive, the filler is sodium silicate, and the ratio of the soluble adhesive to the filler is 1.5:

10.

3. The method for forming an underwater high-pressure airbag according to claim 1, characterized in that: In the channel processing step, the number of holes on the surface of the core is 4-8, and each hole is connected to the channel.

4. The method for forming an underwater high-pressure airbag according to claim 1, characterized in that: In the inner layer weaving step, the carbon fiber is woven into 3-5 layers, and adhesive is applied after each layer is woven.

5. The method for forming an underwater high-pressure airbag according to claim 1, characterized in that: In the rubber wrapping step, the thickness of the rubber bag is 1-20 mm, the pressure inside the rubber bag is 20-50 kPa, and the pressure outside the rubber bag is 150-200 kPa.

6. The method for forming an underwater high-pressure airbag according to claim 1, characterized in that: In the step of weaving the outer layer, the carbon fiber is woven into 4-6 layers on the outer layer, and adhesive is applied after each layer is woven.

7. The method for forming an underwater high-pressure airbag according to claim 1, characterized in that: In the vulcanization step, the pressure during vulcanization is 290-380 kPa, and the temperature during vulcanization is 130° C.-160° C.

8. The method for forming an underwater high-pressure airbag according to claim 1, characterized in that: In the mold dissolving step, the solvent is clean water, and the pressure of the clean water flushing is 100-140 kPa.

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