Low-density material forming device and method for shell

Abstract

The present invention discloses a low-density material molding device and method for a shell. The low-density material is coated on the inner surface of the shell, and the device includes: a breathable film, a hard plate and a plastic bag film for wrapping the shell coated with the low-density material; the breathable film is placed on the low-density material; the breathable film and the inner surface of the shell coated with the low-density material have the same shape and are equal in size; the hard plate is located on the breathable film and is fixedly connected to the breathable film; an air extraction hole is provided on the plastic bag film for one end of the air extraction pipe to pass through; a vacuum pump is connected to the other end of the air extraction pipe for vacuuming the plastic bag film and heating and curing the low-density material of the shell after vacuuming through an oven. In the present invention, by providing a plastic bag film, an air extraction pipe and a vacuum pump, the shell wrapped by the plastic bag film can be vacuumed and then heated and cured, which solves the problem that the low-density material flows during the curing process, resulting in the boundary not being attached to the shape after curing and contaminating the shell.

Description

Technical Field

[0001] The present invention relates to the technical field of low-density material molding, and in particular to a low-density material molding device and method for a shell. Background Art

[0002] In the prior art, aluminum alloy thin-walled shells are required to provide positive buoyancy when used in deep water, so low-density high-strength materials need to be installed and coated inside the shell. Due to the complex internal structure of the shell and the special processability of low-density high-strength material molding, the low-density material needs to be coated on the inside of the shell and then pre-cured or heated. The low-density material will expand in volume during the curing process, resulting in a change in density. During the heating and curing process, the resin fluidity in the uncured low-density material increases, and the flow of the uncured low-density material causes the boundary to not adhere to the shape after curing and contaminates the processed surface of the shell.

[0003] In the prior art, low-density materials are solidified using internal and external molding pressure tools. The molding tools have the following difficulties: (1) The internal and external molding pressure tools are made of metal, and manual operation is labor-intensive; (2) The flatness requirements for the low-density and high-strength material coating substrate are high, which will lead to uneven overall density; (3) The tooling sealing requirements are high, which may cause resin flow problems in the buoyancy material; (4) It is difficult to solve the problem of low-density material flow during the curing process.

[0004] There is currently no effective solution to the problem that low-density materials flow during the curing process when using internal and external molding pressure tooling to fix low-density materials, resulting in the boundary not being attached to the mold after curing, contaminating the shell, and high labor intensity in operation. Summary of the invention

[0005] The embodiment of the present invention provides a low-density material molding device and method for a shell to solve the problem in the prior art of using internal and external molding pressure tooling to fix the low-density material, that the low-density material flows during the curing process, resulting in the boundary not being attached to the mold after curing, contaminating the shell, and having high labor intensity in operation.

[0006] To achieve the above-mentioned purpose, on the one hand, the present invention provides a low-density material molding device for a shell, wherein the low-density material is coated on the inner surface of the shell, and the device comprises: a breathable film, a hard plate and a plastic bag film for wrapping the shell coated with the low-density material; the breathable film is arranged on the low-density material; the breathable film and the inner surface of the shell coated with the low-density material have the same shape and are equal in size; the hard plate is located on the breathable film and is fixedly connected to the breathable film; an exhaust hole is opened on the plastic bag film for allowing one end of an exhaust pipe to pass through; a vacuum pump is connected to the other end of the exhaust pipe for evacuating the plastic bag film and curing the vacuumized low-density material of the shell by heating in an oven.

[0007] Optionally, a separation membrane is adhered to the port or hole of the shell.

[0008] Optionally, the hard plate and the breathable membrane have the same shape and size.

[0009] Optionally, the low-density material is foam.

[0010] Optionally, the thickness of the hard plate is 3 to 5 mm.

[0011] Optionally, the material of the hard plate is silicone or fiberglass.

[0012] Optionally, the hard plate is fixedly connected to the breathable membrane by adhesive.

[0013] On the other hand, the present invention provides a method for forming a shell with a low-density material, the method comprising: coating the inner surface of the shell with a low-density material; obtaining a breathable film of the same shape and size as the inner surface of the shell after coating with the low-density material, and placing the breathable film on the low-density material; a hard board is fixedly connected to the upper surface of the breathable film; according to the size of the shell, obtaining a plastic bag film that can completely wrap the shell, and wrapping the shell after pasting the hard board with the plastic bag film; opening an exhaust hole in the plastic bag film, inserting one end of an exhaust pipe into the exhaust hole, and connecting the other end of the exhaust pipe to a vacuum pump to evacuate the plastic bag film; heating and curing the low-density material of the shell after evacuation to obtain a target shell.

[0014] Optionally, before coating the inner surface of the shell with a low-density material, the method includes: cleaning and degreasing the inner surface, ports, holes and outer surface of the shell; and pasting a separation membrane to the ports and holes of the shell after cleaning and degreasing.

[0015] Optionally, the heating temperature is 90-110° C.; the heating time is 8-9 hours.

[0016] Beneficial effects of the present invention:

[0017] The present invention provides a device and method for forming a low-density material for a shell, wherein the low-density material is coated on the inner surface of the shell, and the device comprises: a breathable film, a hard plate and a plastic bag film for wrapping the shell coated with the low-density material; the breathable film is placed on the low-density material; the breathable film and the inner surface of the shell coated with the low-density material have the same shape and are equal in size; the hard plate is located on the breathable film and is fixedly connected to the breathable film; an exhaust hole is provided on the plastic bag film for allowing one end of an exhaust pipe to pass through; a vacuum pump is connected to the other end of the exhaust pipe for evacuating the plastic bag film and curing the vacuumized low-density material of the shell by heating in an oven.

[0018] In the above structural design, by setting up a plastic bag film, an exhaust pipe and a vacuum pump, the shell coated with a low-density material wrapped in the plastic bag film can be evacuated, and then heated and cured, which solves the problem of low-density material flowing during the curing process, resulting in the boundary not being attached to the shape after curing and contaminating the shell. The device is simple to operate and improves work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of a low-density material molding device for a shell provided by an embodiment of the present invention;

[0020] Figure 2 The present invention is a flowchart of a method for forming a low-density material for a shell provided by an embodiment of the present invention.

[0021] Explanation of symbols:

[0022] Breathable membrane-1, hard board-2, plastic bag membrane-3, exhaust pipe-4, separation membrane-5, shell-6, low-density material-7, sealing strip-8. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] In the prior art, low-density material 7 is solidified using internal and external molding pressure tooling. The molding tooling has the following difficulties: (1) The internal and external molding pressure tooling is made of metal, and manual operation is labor-intensive; (2) The flatness requirement for the low-density and high-strength material coating substrate is high, which will lead to uneven overall density; (3) The tooling sealing requirement is high, and resin flow problems in the buoyancy material may occur; (4) It is difficult to solve the problem of low-density material 7 flowing during the curing process.

[0025] Therefore, the present invention provides a device for molding a housing 6 with a low-density material 7, Figure 1 FIG. 1 is a schematic diagram of a structure of a device for forming a shell 6 with a low-density material 7 provided in an embodiment of the present invention. Figure 1 As shown, the low-density material 7 is coated on the inner surface of the shell 6. The low-density material 7 is foam. Specifically, the foam is synthetic foam, such as glass bead resin composite material. The main characteristics of this material are low density, shock absorption, insulation and fire prevention.

[0026] The device comprises: a breathable film 1, a hard plate 2 and a plastic bag film 3 for wrapping the shell 6 coated with a low-density material 7;

[0027] The breathable membrane 1 is disposed on the low-density material 7; the breathable membrane 1 and the inner surface of the shell 6 coated with the low-density material 7 have the same shape and are equal in size;

[0028] Specifically, according to the inner surface shape of the shell 6 coated with the low-density material 7, a breathable membrane 1 with the same shape and size as the shell 6 is obtained, and the breathable membrane 1 is placed on the low-density material 7; wherein the breathable membrane 1 has the characteristic that air molecules can pass freely, while molecules of other materials constituting the low-density material 7 cannot pass through, thus ensuring that the molecules of the low-density material 7 will not pass through the breathable membrane 1.

[0029] In an optional embodiment, a separation membrane 5 is pasted on the port and hole of the shell 6, that is, the separation membrane 5 is pasted around the low-density material 7 to protect the shell 6 and prevent the uncured low-density material 7 from flowing and contaminating the shell 6 during the heating process.

[0030] In an optional embodiment, the hard plate 2 is located on the breathable membrane 1 and fixedly connected to the breathable membrane 1; specifically, the hard plate 2 is fixedly connected to the breathable membrane 1 by adhesive; the hard plate 2 and the breathable membrane 1 have the same shape and size, so that the hard plate 2 can completely cover the breathable membrane 1. The thickness of the hard plate 2 is 3 to 5 mm. The material of the hard plate 2 is silicone or fiberglass.

[0031] Specifically, the hard board 2 is laid on the breathable membrane 1. The hard board 2 itself has a certain supporting strength, so that the uniform distribution of external pressure can be improved. At the same time, the hard board 2 can effectively hinder the flow of uncured low-density material 7 during the heating process, and realize the size and other attachment of the low-density material 7 after curing.

[0032] The plastic bag film 3 is provided with an exhaust hole for one end of the exhaust pipe 4 to pass through; a vacuum pump is connected to the other end of the exhaust pipe 4 to evacuate the plastic bag film 3 and heat and cure the vacuumed low-density material 7 of the shell 6 in an oven.

[0033] Specifically, according to the size of the shell 6, obtain a plastic bag film 3 that can completely wrap the shell 6, and wrap the shell 6 after pasting the hard board 2 with the plastic bag film 3; paste sealing strips 8 around the plastic bag film 3 to prevent the plastic bag film 3 from being breathable. Open an exhaust hole on the plastic bag film 3, and insert one end of the exhaust pipe 4 into the exhaust hole, and connect the other end of the exhaust pipe 4 to a vacuum pump to evacuate the plastic bag film 3; during the operation, care should be taken to prevent the plastic bag film 3 from being damaged; start the vacuum pump, and when the vacuum value in the plastic bag film 3 reaches more than 98%, and the vacuum drop value is less than 5%, turn off the vacuum pump to complete the vacuuming process; place the low-density material 7 of the shell 6 after evacuation in an oven for heating and curing to obtain the target shell 6. Wherein, the heating temperature is 90-110°C; the heating time is 8-9h.

[0034] Among them, the wrapping method of the plastic bag film 3 is: wrap half of the shell with half of the plastic bag film 3, and stick the sealing strip 8 around the plastic bag film 3 to ensure that the sealing strip 8 is tightly adhered; wrap the other half of the shell with the other half of the plastic bag film 3, and stick the sealing strip 8 around the other half of the plastic bag film 3 to ensure that the sealing strip 8 is tightly adhered.

[0035] After the heating and curing is completed, the vacuum tube is pulled out, the plastic bag film 3 is removed, the hard plate 2 is recovered and the separation film 5 is torn off.

[0036] Figure 2 FIG. 1 is a flow chart of a method for forming a housing 6 using a low-density material 7 according to an embodiment of the present invention. Figure 2 As shown, the method includes:

[0037] S101. Coating the inner surface of the housing 6 with a low-density material 7;

[0038] In an optional implementation, before S101, the following steps are further included:

[0039] S1001. Clean and degrease the inner surface, ports, holes and outer surface of the housing 6;

[0040] S1002. A separation membrane 5 is attached to the ports and holes of the shell 6 after cleaning and degreasing.

[0041] That is, the separation membrane 5 is pasted around the low-density material 7 to protect the shell 6 and prevent the uncured low-density material 7 from flowing and contaminating the shell 6 during the heating process.

[0042] S102. According to the inner surface shape of the shell 6 coated with the low-density material 7, obtain a breathable membrane 1 having the same shape and size as the shell 6, and place the breathable membrane 1 on the low-density material 7;

[0043] The characteristic of the breathable membrane 1 is that air molecules can pass freely, while other material molecules constituting the low-density material 7 cannot pass through. In this way, it can be ensured that the molecules of the low-density material 7 will not pass through the breathable membrane 1.

[0044] S103. A hard plate 2 is fixedly connected to the upper surface of the breathable membrane 1;

[0045] In the present invention, the hard board 2 is fixedly connected to the breathable membrane 1 by adhesive; the hard board 2 and the breathable membrane 1 have the same shape and size, so that it can be ensured that the hard board 2 completely covers the breathable membrane 1. The thickness of the hard board 2 is 3 to 5 mm. The material of the hard board 2 is silicone or fiberglass. Specifically, the hard board 2 is laid on the breathable membrane 1, and the hard board 2 itself has a certain supporting strength, so that the uniform distribution of the external pressure can be improved. At the same time, the hard board 2 can effectively hinder the flow of the uncured low-density material 7 during the heating process, so as to achieve the size and other attachment of the low-density material 7 after curing.

[0046] S104. According to the size of the shell 6, obtain a plastic bag film 3 that can completely wrap the shell 6, and wrap the shell 6 after pasting the hard board 2 with the plastic bag film 3;

[0047] The wrapping method of the plastic bag film 3 is as follows: wrap half of the shell with half of the plastic bag film 3, and stick the sealing strip 8 around the plastic bag film 3 to ensure that the sealing strip 8 is firmly adhered; wrap the other half of the shell with the other half of the plastic bag film 3, and stick the sealing strip 8 around the other half of the plastic bag film 3 to ensure that the sealing strip 8 is firmly adhered.

[0048] S105. A vacuum hole is formed on the plastic bag film 3, and one end of the vacuum tube 4 is inserted into the vacuum hole, and the other end of the vacuum tube 4 is connected to a vacuum pump to vacuum the plastic bag film 3;

[0049] Specifically, according to the size of the shell 6, obtain a plastic bag film 3 that can completely wrap the shell 6, and wrap the shell 6 after pasting the hard board 2 with the plastic bag film 3; paste sealing strips 8 around the plastic bag film 3 to prevent the plastic bag film 3 from being breathable. Open an exhaust hole on the plastic bag film 3, and insert one end of the exhaust pipe 4 into the exhaust hole, and connect the other end of the exhaust pipe 4 to a vacuum pump to evacuate the plastic bag film 3; during the operation, be careful to prevent the plastic bag film 3 from being damaged; start the vacuum pump, and when the vacuum value in the plastic bag film 3 reaches more than 98%, and the vacuum drop value is less than 5%, turn off the vacuum pump to complete the vacuuming process;

[0050] S106. Heat and solidify the low-density material 7 of the shell 6 after vacuuming to obtain the target shell 6. The heating temperature is 90-110° C. and the heating time is 8-9 hours.

[0051] After the heating and curing is completed, the vacuum tube is pulled out, the plastic bag film 3 is removed, the hard plate 2 is recovered and the separation film 5 is torn off.

[0052] Beneficial effects of the present invention:

[0053] The present invention provides a device and method for forming a shell 6 with a low-density material 7, wherein the low-density material 7 is coated on the inner surface of the shell 6, and the device comprises: a breathable film 1, a hard board 2 and a plastic bag film 3 for wrapping the shell 6 coated with the low-density material 7; the breathable film 1 is placed on the low-density material 7; the breathable film 1 and the inner surface of the shell 6 coated with the low-density material 7 have the same shape and are equal in size; the hard board 2 is located on the breathable film 1 and is fixedly connected to the breathable film 1; an exhaust hole is provided on the plastic bag film 3 for allowing one end of an exhaust pipe 4 to pass through; a vacuum pump is connected to the other end of the exhaust pipe 4 for evacuating the plastic bag film 3 and curing the vacuumized low-density material 7 of the shell 6 by heating in an oven.

[0054] In the above structural design, by setting up a plastic bag film 3, an exhaust pipe 4 and a vacuum pump, the shell 6 coated with a low-density material 7 wrapped in the plastic bag film 3 can be evacuated, and then heated and cured, thereby solving the problem that the low-density material 7 flows during the curing process, resulting in the boundary not being attached to the shape after curing and contaminating the shell 6. The device is simple to operate and improves work efficiency.

[0055] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A low-density material molding device for a shell, wherein the low-density material is coated on the inner surface of the shell, characterized in that: include: A breathable film, a hard plate and a plastic bag film for wrapping the shell coated with a low-density material; The breathable membrane is arranged on the low-density material; the breathable membrane and the inner surface of the shell coated with the low-density material have the same shape and are equal in size; The hard plate is located on the breathable membrane and is fixedly connected to the breathable membrane; The plastic bag film is provided with an exhaust hole for one end of the exhaust pipe to pass through; the other end of the exhaust pipe is connected with a vacuum pump for evacuating the plastic bag film and heating and curing the low-density material of the shell after evacuation in an oven; The low-density material is foam; the foam is a glass microbead resin composite material.

2. The device according to claim 1, characterized in that: A separation membrane is attached to the port and hole of the housing.

3. The device according to claim 1, characterized in that: The hard plate and the breathable membrane have the same shape and size.

4. The device according to claim 1, characterized in that: The thickness of the hard plate is 3-5 mm.

5. The device according to claim 4, characterized in that: The material of the hard plate is silica gel or glass fiber reinforced plastic.

6. The device according to claim 1, characterized in that: The hard plate is fixedly connected to the breathable membrane by adhesive.

7. A method for forming a low-density material for a shell, characterized in that: include: coating the inner surface of the shell with a low-density material; The low-density material is foam; The foam is a glass microbead resin composite material; According to the shape of the inner surface of the shell on which the low-density material is coated, obtaining a breathable membrane having the same shape and size as the inner surface of the shell, and placing the breathable membrane on the low-density material; A hard plate is fixedly connected to the upper surface of the breathable membrane; According to the size of the shell, obtain a plastic bag film that can completely wrap the shell, and wrap the shell after the hard board is pasted with the plastic bag film; A vacuum hole is opened on the plastic bag film, one end of a vacuum tube is inserted into the vacuum hole, and the other end of the vacuum tube is connected to a vacuum pump to vacuum the plastic bag film; The low-density material of the shell after vacuuming is heated and solidified to obtain a target shell.

8. The method according to claim 7, characterized in that Before coating the inner surface of the shell with a low-density material, the method includes: Cleaning and degreasing the inner surface, ports, holes and outer surface of the housing; A separation membrane is attached to the ports and holes of the shell after cleaning and degreasing.

9. The method according to claim 7, characterized in that: The heating temperature is 90-110° C.; the heating time is 8-9 hours.

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