A process for preparing a heat-resistant multilayer barrier composite bottle

Abstract

This invention relates to the field of heat-resistant multilayer barrier composite bottle manufacturing technology, and discloses a manufacturing process for a heat-resistant multilayer barrier composite bottle. The invention includes step one: selecting a polyolefin powder with a high melt index and good fluidity and loading it into a rotational molding mold; heating the mold to above the melting point of the polyolefin powder; controlling the two mutually perpendicular shafts of the mold to rotate and revolve, so that the powder, after melting, is evenly distributed on the inner wall of the mold to form a hollow inner barrel structure; and allowing it to cool naturally after molding and then demold. This invention has high density, maintains good sealing performance under high pressure, and has high structural strength. The support provided by the expansion plates after the bottle body expands under pressure improves its lateral strength and reduces the tendency to deform under impact.

Description

Technical Field

[0001] This invention relates to the field of heat-resistant multilayer barrier composite bottle preparation technology, and in particular to a heat-resistant multilayer barrier composite bottle preparation process. Background Technology

[0002] Existing solid rocket motor propulsion systems are used for orbital transfer, terminal velocity correction, and attitude control of aircraft. These systems mainly include air-cooled systems, single / dual-component liquid propulsion systems, and solid rocket motor propulsion systems. Solid rocket motor propulsion systems use solid fuel as an energy source. When needed, high-energy solid fuel is ignited by an electric igniter to produce high-temperature, high-pressure gas, which is then used for attitude control. If attitude correction is required, the high-temperature gas can be controlled by a solenoid valve to open and close, exiting from the nozzle to generate the necessary thrust.

[0003] Currently, carbon fiber composite pressure vessels are mainly used in: medical respirator systems, including home and medical oxygen respirators, self-contained positive pressure air respirators for firefighting, and compressed oxygen respirators for rescue; aerospace, including aircraft escape slide inflation devices, ejection seats, and shells; and new energy vehicle applications, including compressed natural gas storage cylinders such as steel-lined carbon fiber circumferentially wound steel composite cylinders (CNG-2), aluminum-lined carbon fiber fully wound composite cylinders (CNG-3), and plastic-lined fully wound composite cylinders (CNG-4), as well as high-pressure hydrogen storage vessels. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a process for preparing a heat-resistant multilayer barrier composite bottle in order to overcome the problems mentioned above.

[0005] The technical problem solved by this invention is achieved through the following technical solution:

[0006] A process for preparing a heat-resistant multilayer barrier composite bottle includes the following steps;

[0007] Step 1: Select polyolefin powder with high melt index and good fluidity and load it into the rotational molding mold. Heat the mold to above the melting point of the polyolefin powder. Control the two mutually perpendicular rotating shafts of the mold to rotate around and rotate on their own axis, so that the powder is evenly distributed on the inner wall of the mold after melting to form a hollow inner barrel structure. After molding, allow it to cool and demold naturally.

[0008] Step two involves clamping the outer wall of the hollow inner barrel structure completed in step one using a split-jacket mold. Then, the mold surface is heated above the melting point of the polyolefin powder, and under constant pressure, the hexagonal protrusions on the inner wall of the mold are used to form a shape resembling... Figure 1 The reinforced hot-rolled structure shown;

[0009] Step 3: Apply adhesive to the hexagonal hot-rolled opening from Step 2 and insert a hexagonal quartz glass fiber composite shell inside it. The thickness of the quartz glass fiber composite shell is the same as the depth of the hexagonal hot-rolled opening, and the sides are gap-fitted to obtain the reinforced inner liner bottle body.

[0010] Step four: Inject pressurized air for constant pressure into the reinforced inner liner bottle body that has completed step three, and then wrap it with carbon fiber.

[0011] Step 5: Apply fiber-reinforced resin to the outside of the bottle after the carbon fiber winding is completed, and rotate the clamp to ensure uniform resin flow.

[0012] Step 6: After the reinforcing resin is applied, the surface of the reinforcing resin is light-cured using a microwave light irradiation device;

[0013] Step 7: Repeat steps 5 and 6 until the outermost reinforcing resin is completely cured.

[0014] In one embodiment of the manufacturing process of a heat-resistant multilayer barrier composite bottle, during the carbon fiber winding process, the carbon fiber filaments are wound onto multiple roving winding frames, guided by fixed pulleys, and fully impregnated in liquid epoxy resin to form a one-centimeter-wide strip of fiber bundle. Under computer control, the fiber bundle is repeatedly wound around the outer periphery of the inner liner through the axial reciprocating motion of the laying box and the rotation drive device of the inner liner.

[0015] In one embodiment of the manufacturing process of a heat-resistant multilayer barrier composite bottle, the viscosity of the reinforcing resin on the outer side is lower than that on the inner side. This facilitates the removal of air bubbles during repeated winding, thereby obtaining a dense winding structure.

[0016] In one embodiment of the manufacturing process of a heat-resistant multilayer barrier composite bottle, the temperature of the carbon fiber after being fully impregnated in liquid epoxy resin and before being wound onto the outside of the reinforced inner liner bottle body shall not be lower than 140 degrees Celsius.

[0017] In one embodiment of the manufacturing process of a heat-resistant multilayer barrier composite bottle, 1 wt% of low-viscosity EVA-g-MA is added to the end material of the reinforced inner liner bottle body after hot melting. This is used to increase the viscosity and torque of the gas injection ports at both ends of the reinforced inner liner bottle body, which facilitates the installation of metal filling ports and improves the material's sealing performance.

[0018] In one embodiment of the preparation process of a heat-resistant multilayer barrier composite bottle, the viscosity of the epoxy resin is 4000-8000 cP at 25 degrees Celsius, and the particle size of the solid particles therein is less than 10-30 micrometers.

[0019] In one embodiment of the preparation process of a heat-resistant multilayer barrier composite bottle, the equivalent ratio of epoxy resin to curing agent is 1:1, and the microwave-absorbing inorganic ferrite particles are uniformly dispersed.

[0020] In one embodiment of the preparation process of a heat-resistant multilayer barrier composite bottle, the temperature during the curing of epoxy resin should be controlled at 20 degrees Celsius below the softening point of the polyolefin powder.

[0021] In one embodiment of the manufacturing process of a heat-resistant multilayer barrier composite bottle, a clay film with a thickness of not less than one nanometer is coated on the inner and outer surfaces of a carbon fiber impregnated epoxy resin matrix, which effectively improves the density and sealing effect of the composite bottle.

[0022] The advantages and positive effects of this invention are: high density, which can maintain good sealing performance under high pressure, and high structural strength. The support of the apron after the bottle expands under pressure improves its lateral strength and reduces the phenomenon of easy deformation under impact. Attached Figure Description

[0023] The present invention will be further described below with reference to the accompanying drawings and examples.

[0024] Figure 1 This is a schematic diagram of the structure of the present invention. Detailed Implementation

[0025] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the invention, and therefore only show the components relevant to the invention. The embodiments of the invention are further described in detail below with reference to the accompanying drawings:

[0026] like Figure 1 As shown, the process for preparing a heat-resistant multilayer barrier composite bottle according to the present invention includes the following steps;

[0027] Step 1: Select polyolefin powder with high melt index and good fluidity and load it into the rotational molding mold. Heat the mold to above the melting point of the polyolefin powder. Control the two mutually perpendicular rotating shafts of the mold to rotate around and rotate on their own axis, so that the powder is evenly distributed on the inner wall of the mold after melting to form a hollow inner barrel structure. After molding, allow it to cool and demold naturally.

[0028] Step two involves clamping the outer wall of the hollow inner barrel structure completed in step one using a split-jacket mold. Then, the mold surface is heated above the melting point of the polyolefin powder, and under constant pressure, the hexagonal protrusions on the inner wall of the mold are used to form a shape resembling... Figure 1 The reinforced hot-rolled structure shown;

[0029] Step 3: Apply adhesive to the hexagonal hot-rolled opening from Step 2 and insert a hexagonal quartz glass fiber composite shell inside it. The thickness of the quartz glass fiber composite shell is the same as the depth of the hexagonal hot-rolled opening, and the sides are gap-fitted to obtain the reinforced inner liner bottle body.

[0030] Step four: Inject pressurized air for constant pressure into the reinforced inner liner bottle body that has completed step three, and then wrap it with carbon fiber.

[0031] Step 5: Apply fiber-reinforced resin to the outside of the bottle after the carbon fiber winding is completed, and rotate the clamp to ensure uniform resin flow.

[0032] Step 6: After the reinforcing resin is applied, the surface of the reinforcing resin is light-cured using a microwave light irradiation device;

[0033] Step 7: Repeat steps 5 and 6 until the outermost reinforcing resin is completely cured.

[0034] In one embodiment of the manufacturing process of a heat-resistant multilayer barrier composite bottle, during the carbon fiber winding process, the carbon fiber filaments are wound onto multiple roving winding frames, guided by fixed pulleys, and fully impregnated in liquid epoxy resin to form a one-centimeter-wide strip of fiber bundle. Under computer control, the fiber bundle is repeatedly wound around the outer periphery of the inner liner through the axial reciprocating motion of the laying box and the rotation drive device of the inner liner.

[0035] In one embodiment of the manufacturing process of a heat-resistant multilayer barrier composite bottle, the viscosity of the reinforcing resin on the outer side is lower than that on the inner side. This facilitates the removal of air bubbles during repeated winding, thereby obtaining a dense winding structure.

[0036] In one embodiment of the manufacturing process of a heat-resistant multilayer barrier composite bottle, the temperature of the carbon fiber after being fully impregnated in liquid epoxy resin and before being wound onto the outside of the reinforced inner liner bottle body shall not be lower than 140 degrees Celsius.

[0037] In one embodiment of the manufacturing process of a heat-resistant multilayer barrier composite bottle, 1 wt% of low-viscosity EVA-g-MA is added to the end material of the reinforced inner liner bottle body after hot melting. This is used to increase the viscosity and torque of the gas injection ports at both ends of the reinforced inner liner bottle body, which facilitates the installation of metal filling ports and improves the material's sealing performance.

[0038] In one embodiment of the preparation process of a heat-resistant multilayer barrier composite bottle, the viscosity of the epoxy resin is 4000-8000 cP at 25 degrees Celsius, and the particle size of the solid particles therein is less than 10-30 micrometers.

[0039] In one embodiment of the preparation process of a heat-resistant multilayer barrier composite bottle, the equivalent ratio of epoxy resin to curing agent is 1:1, and the microwave-absorbing inorganic ferrite particles are uniformly dispersed.

[0040] In one embodiment of the preparation process of a heat-resistant multilayer barrier composite bottle, the temperature during the curing of epoxy resin should be controlled at 20 degrees Celsius below the softening point of the polyolefin powder.

[0041] In one embodiment of the manufacturing process of a heat-resistant multilayer barrier composite bottle, a clay film with a thickness of not less than one nanometer is coated on the inner and outer surfaces of a carbon fiber impregnated epoxy resin matrix, which effectively improves the density and sealing effect of the composite bottle.

[0042] It should be emphasized that the embodiments described in this invention are illustrative rather than limiting. Therefore, this invention is not limited to the embodiments described in the specific implementation. Any other implementation methods derived by those skilled in the art based on the technical solutions of this invention also fall within the scope of protection of this invention.

Claims

1. A process for preparing a heat-resistant multilayer barrier composite bottle, characterized in that: Includes the following steps; Step 1: Select polyolefin powder with high melt index and good fluidity and load it into the rotational molding mold. Heat the mold to above the melting point of the polyolefin powder. Control the two mutually perpendicular rotating shafts of the mold to rotate around and rotate on their own axis, so that the powder is evenly distributed on the inner wall of the mold after melting to form a hollow inner barrel structure. After molding, allow it to cool and demold naturally. Step 2: The outer wall of the hollow inner barrel structure completed in Step 1 is clamped by a split-jacket mold. Then, the mold surface is heated to a temperature higher than the melting point of the polyolefin powder and a reinforced hot-rolled structure is formed under constant pressure by the action of the hexagonal protrusions on the inner wall of the mold. Step 3: Apply adhesive to the hexagonal hot-rolled opening from Step 2 and insert a hexagonal quartz glass fiber composite shell inside it. The thickness of the quartz glass fiber composite shell is the same as the depth of the hexagonal hot-rolled opening, and the sides are gap-fitted to obtain the reinforced inner liner bottle body. Step four: Inject pressurized air for constant pressure into the reinforced inner liner bottle body that has completed step three, and then wrap it with carbon fiber. Step 5: Apply fiber-reinforced resin to the outside of the bottle after the carbon fiber winding is completed, and rotate the clamp to ensure uniform resin flow. Step 6: After the reinforcing resin is applied, the surface of the reinforcing resin is light-cured using a microwave light irradiation device; Step 7: Repeat steps 5 and 6 until the outermost reinforcing resin is completely cured.

2. The process for preparing a heat-resistant multilayer barrier composite bottle according to claim 1, characterized in that: During the carbon fiber winding process, the carbon fiber filaments are wound onto multiple roving winding frames, guided by fixed pulleys, and fully impregnated in liquid epoxy resin to form a one-centimeter-wide strip of fiber bundle. Under computer control, the fiber bundle is repeatedly wound around the outer periphery of the inner liner through the reciprocating motion of the laying box along the axial direction, in conjunction with the rotation drive device of the inner liner.

3. The process for preparing a heat-resistant multilayer barrier composite bottle according to claim 2, characterized in that: The viscosity of the reinforcing resin on the outer side is lower than that on the inner side, which facilitates the removal of air bubbles during repeated winding, thereby obtaining a dense winding structure.

4. The process for preparing a heat-resistant multilayer barrier composite bottle according to claim 3, characterized in that: The temperature of the carbon fiber after it has been fully impregnated in liquid epoxy resin and before it is wound onto the outside of the reinforced inner liner bottle must not be lower than 140 degrees Celsius.

5. The process for preparing a heat-resistant multilayer barrier composite bottle according to claim 4, characterized in that: 1 wt% of low-viscosity EVA-g-MA is added to the end material of the reinforced inner liner bottle body after hot melting to improve the viscosity and torque of the gas injection ports at both ends of the reinforced inner liner bottle body, thereby facilitating the installation of metal filling ports and improving the material's sealing performance.

6. The process for preparing a heat-resistant multilayer barrier composite bottle according to claim 5, characterized in that: The epoxy resin has a viscosity of 4000-8000 cP at 25 degrees Celsius, and the solid particles therein have a particle size of less than 10-30 micrometers.

7. The process for preparing a heat-resistant multilayer barrier composite bottle according to claim 6, characterized in that: The epoxy resin and curing agent have an equivalent ratio of 1:1, and the microwave-absorbing inorganic ferrite particles are uniformly dispersed.

8. The process for preparing a heat-resistant multilayer barrier composite bottle according to claim 7, characterized in that: When curing epoxy resin, the temperature should be controlled 20 degrees Celsius below the softening point of the polyolefin powder.

9. The process for preparing a heat-resistant multilayer barrier composite bottle according to claim 8, characterized in that: A clay film with a thickness of not less than one nanometer is coated on the inside and outside of the carbon fiber impregnated epoxy resin matrix, which effectively improves the density and sealing effect of the composite bottle.

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