Manufacturing method of integrally-formed aircraft adapter

Abstract

A manufacturing method of an integrally-formed aircraft adapter comprises the following steps of material preparing, pretreatment, integral forming and gridding cloth pasting, an aircraft adapter integral forming mold is used in the manufacturing process, exhaust holes are formed in the bottom of a forming groove of an upper mold, a rubber plate with a mushroom-head column is adopted, and the air holes are formed in the bottom of the forming groove of the upper mold; in the step of integral forming, the smooth face of the rubber plate makes contact with the bottom of a forming groove of a lower mold, the face, provided with the mushroom-head column, of the rubber plate faces an upper mold, and the mushroom-head column is wrapped by a foaming material during pouring. By means of the method, the attaching force between the rubber plate and the foaming body is increased, the problem that the overall thickness of the adapter is inconsistent finally due to the fact that glue is used for attaching in the later period is solved, meanwhile, the technological process is simplified, and the consistency of product quality is guaranteed; and the defects of large surface air holes, material shortage, local whitening and softening of the foaming body are effectively eliminated, so that the product quality and the percent of pass are improved.

Description

Technical Field

[0001] The invention belongs to the technical field of aircraft, and in particular relates to a method for manufacturing an integrally formed aircraft adapter. Background Art

[0002] The aircraft adapter is an auxiliary device that serves as a connection inside the aircraft and plays an important role in the storage, transportation and launch of the aircraft. The aircraft adapter is generally composed of a metal shell, a rubber-plastic plate, a rigid polyurethane foam layer, and an anti-static cloth. The adapter molding method is generally as follows: first, the rigid polyurethane foam is solidified and formed, and then the rubber-plastic plate is pasted on the surface of the rigid polyurethane foam, and finally the anti-static cloth is affixed. The above molding method is not only cumbersome, but the pasting process of the rigid polyurethane foam layer and the rubber-plastic plate is mostly manual. The thickness of the glue layer will affect the overall thickness of the adapter, and the quality consistency of the final product cannot be guaranteed. Therefore, this molding method is not suitable for application scenarios with high precision requirements.

[0003] For example, the patent document with publication number CN113772114A discloses an aircraft adapter and a manufacturing method thereof, including an adapter body; the adapter body is a circular arc petal block, the number is multiple, and the multiple adapter bodies can be spliced ​​into a ring; the front side of the adapter body is provided with multiple weight-reducing holes. The present invention also provides a method for manufacturing an aircraft adapter. The adapter is lightweight in design, reliable matching support is ensured, radial movement of the aircraft is limited, the function of driving the adapter to move is met, the structure and function are integrated, and reliable limiting can be achieved while moving simultaneously with the aircraft.

[0004] However, the above-mentioned prior art still has to solve the technical problem that the thickness of the adhesive layer affects the overall thickness of the adapter, which leads to the inability to ensure the quality consistency of the final product, and the technical problem that the surface of the product after molding has large pores, missing materials, partial whitening, and softness. Therefore, it is necessary to design a manufacturing method of an integrated aircraft adapter that can ensure the quality consistency of the final product and has high surface accuracy. Summary of the invention

[0005] In view of the problems existing in the prior art, the present invention provides a method for manufacturing an integrally formed aircraft adapter.

[0006] The present invention is implemented as follows: a method for manufacturing an integrally formed aircraft adapter comprises the following steps:

[0007] S1, batching: adjust the temperature of the batching room to 25±2°C, adjust the humidity of the batching room to less than 60%, prepare the foaming white material, pump the prepared white material into the white tank of the high-pressure foaming machine at a temperature of 23°C, and at the same time pump the foaming black material into the black tank of the high-pressure foaming machine at a temperature of 22°C;

[0008] S2, Pretreatment: Use an integrally molded die for the aircraft adapter. The integrally molded die includes an upper die and a lower die. After evenly applying a release agent to the molding grooves of the upper die and the lower die, place the upper die and the lower die in an oven at a temperature of 60 °C and preheat for 0.5 hours, then take them out.

[0009] S3, Integral molding: Place the rubber sheet at the bottom of the lower die. When the temperature of the molding grooves of the upper die and the lower die is 36 °C, set the rotation speed of the high-pressure foaming machine to 1700 r / min, and set the mixing ratio of the black material and the white material to 1~1:1.3; Pour the mixture into the molding groove of the lower die, immediately spread it evenly, then quickly close the die, and place it in a curing furnace for curing and molding. After molding, demold to obtain the adapter body.

[0010] S4, Grid cloth pasting: After cutting the grid cloth, fix it on the adapter body with an adhesive. After normal temperature curing for 1 - 1.5 h, complete the assembly of the adapter.

[0011] Further, in the S1 batching step, the white material includes the following components: polyether, flame retardant, and foaming agent. The mixing ratio of the white material is 1:0.1:0.1 in sequence, and the black material is isocyanate.

[0012] Further, in the S2 pretreatment step, the bottom of the molding groove of the upper die is set to be an inward concave semi-circular arc, and a plurality of exhaust holes are provided around the bottom and at the center of the molding groove of the upper die.

[0013] Further, in the S2 pretreatment step, a through groove, a disassembly and assembly cover plate, and positioning dowels are provided at the bottoms of two adjacent molding grooves in the width direction of the lower die. The disassembly and assembly cover plate is installed on the through groove, and the positioning dowel passes through the disassembly and assembly cover plate and is installed at the center of the bottom of the molding groove of the lower die, with the head pointing to the upper die.

[0014] Further, in the S3 integral molding step, the short side surface of the rubber sheet is set to be a smooth surface, a plurality of mushroom head columns are evenly arranged on the long side surface of the rubber sheet, and a through hole is provided at the center of the rubber sheet; The smooth surface is laid flat at the bottom of the molding groove of the lower die, the head of the mushroom head column points to the upper die, and the through hole passes through the positioning dowel.

[0015] Further, both the upper die and the lower die are provided with 4 molding grooves, and they are symmetrically distributed in a cross shape. After the upper die and the lower die are closed, a closed cavity is formed, and 4 identical adapters can be molded simultaneously.

[0016] Further, in the S3 integral molding step, the temperature for curing and molding is 80 ± 5 °C, and the curing time is 0.5 - 1 h.

[0017] Further, in the S3 one-piece molding step, the temperature of the molding die during demolding needs to be below 35°C.

[0018] Further, in the S4 fiberglass mesh pasting step, the size of the cut fiberglass mesh is the same as the size of the smooth surface of the rubber sheet, and it is pasted on the smooth surface of the rubber sheet.

[0019] Further, in the S4 fiberglass mesh pasting step, the adhesive is one or more of 521 glue, DP460 glue, 406 glue, and 302 glue.

[0020] In summary, the beneficial effects of the present invention are as follows:

[0021] (1) By using a rubber sheet with mushroom head columns in the manufacturing method of the present invention, the mushroom head columns extend into the foam, allowing the foam to wrap around the mushroom head columns. Moreover, by utilizing the structural characteristics of the heads of the mushroom head columns, the adhesion between the rubber sheet and the foam is increased, avoiding the problem of inconsistent overall thickness of the final adapter caused by gluing in the later stage. At the same time, the process flow is simplified, ensuring the consistency of product quality.

[0022] (2) By adding exhaust holes to the molding groove of the upper mold of the one-piece molding die used in the manufacturing method of the present invention, the defects of large pores, material shortage, local whitening, and softening on the surface of the foam are effectively eliminated, thereby improving product quality and qualification rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for description in the embodiments will be briefly introduced below.

[0024] Figure 1 It is a schematic structural diagram of the rubber sheet in the embodiment of the present invention;

[0025] Figure 2 It is a schematic structural diagram of the molded adapter in the embodiment of the present invention;

[0026] Figure 3 It is a schematic structural diagram of the upper mold in the embodiment of the present invention;

[0027] Figure 4 It is a schematic structural diagram of the upper surface of the lower mold in the embodiment of the present invention;

[0028] Figure 5 It is a schematic structural diagram of the lower surface of the lower mold in the embodiment of the present invention;

[0029] Description of the attached reference numerals: 1 - fiberglass mesh, 2 - rubber plate, 3 - foam, 4 - mushroom head post, 5 - upper mold, 6 - lower mold, 7 - exhaust hole, 8 - positioning dowel, 9 - through groove, 10 - disassembly and assembly cover plate. Detailed implementation mode

[0030] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a 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 those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0031] Combined with Figures 1 - 5 As shown in the figure, a specific embodiment of the manufacturing method of the integrally formed aircraft adapter provided by the present invention is adopted. An integrally formed mold is used. By arranging mushroom head posts 4 on the surface of the rubber plate 2 connected to the foam 3, during the foam pouring process, when the polyurethane foam grows, the mushroom head posts 4 are tightly wrapped, thereby increasing the adhesion between the two, avoiding the problem of inconsistent overall thickness of the final adapter caused by pasting with glue later, simplifying the process flow at the same time, and ensuring the consistency of product quality.

[0032] The specific content is as follows:

[0033] The embodiment of the present invention provides a manufacturing method of an integrally formed aircraft adapter, including the following steps:

[0034] S1, batching: Adjust the temperature and humidity of the batching room, and at the same time turn on the dehumidification function of the air conditioner. The temperature is adjusted to 25 ± 2 °C, and the humidity is adjusted to less than 60%. Configure the foaming white material, and the white material includes polyether, flame retardant, and foaming agent, which are configured in a ratio of 1:0.1:0.1. After stirring evenly, it is pumped into the white material tank of the high-pressure foaming machine, and the temperature of the white material tank is set to 23 °C. At the same time, the foaming black material is pumped into the black material tank of the high-pressure foaming machine, and the temperature of the black material tank is set to 22 °C. The black material is isocyanate. The high-pressure foaming machine is an H100 type high-pressure foaming machine;

[0035] S2, pretreatment:

[0036] Use an integrated molding die for an aircraft adapter. The integrated molding die includes an upper die 5 and a lower die 6. Thoroughly clean the inner cavities of the upper die 5 and the lower die 6 with alcohol, and then apply a thin layer of release agent to the inner cavities of the upper die 5 and the lower die 6 with a clean brush. Then place the upper die 5 and the lower die 6 in an oven for preheating. Set the oven temperature to 60 °C and the preheating time to 0.5 hours. After preheating, take them out without closing the die. Ensure that the moisture in the release agent in the inner cavities of the upper die 5 and the lower die 6 is completely removed. There should be no phenomena such as dripping or accumulation after the release agent is applied to avoid the outer surface of the adapter being uneven due to residual release agent.

[0037] As Figures 3 - 4 shown, the upper die 5 and the lower die 6 of the integrated molding die are both provided with 4 molding grooves, which are symmetrically distributed in a cross shape. After the upper die 5 and the lower die 6 are closed, a closed cavity is formed, and 4 identical adapters can be molded simultaneously. The edge of the molding groove of the upper die 5 in the width direction is set to be an inner concave semi-circular arc, and the overall edge of the upper die 5 in the width direction is wavy. The edge of the molding groove of the lower die 6 in the width direction is set to be an outer convex semi-circular arc, and the overall edge of the lower die in the width direction is wavy. The sizes of the inner concave semi-circular arc and the outer convex semi-circular arc match, and the sealing performance during die closing is extremely high.

[0038] As Figure 3 shown, multiple exhaust holes 7 are provided around the perimeter and at the center of the bottom of each molding groove of the upper die 5. The total number of exhaust holes 7 in each molding groove is 6 - 11, the aperture size of the exhaust holes 7 is 1 - 1.5 mm, the total number of exhaust holes 7 in each molding groove is preferably 9, and the aperture of the exhaust holes 7 is preferably 1 mm. By providing the exhaust holes 7 on the upper die 5, the molding defects such as depressions, bubbles, softness, and whitening on the surface of the adapter can be effectively reduced, and the quality and appearance fineness of the adapter can be improved.

[0039] As Figures 4 - 5 shown, a through groove 9, a disassembly and assembly cover plate 10, and a positioning dowel 8 are provided at the bottom of two adjacent molding grooves of the lower die 6 in the width direction. The disassembly and assembly cover plate 10 is installed on the through groove 9, and the positioning dowel 8 passes through the disassembly and assembly cover plate 10 and is installed at the center of the bottom of the molding groove of the lower die 6, with the head pointing to the upper die 5, which improves the molding accuracy and the convenience of demolding.

[0040] S3, Integrated molding:

[0041] Place the rubber sheet 2 at the bottom of the forming groove of the lower mold 6. The short side surface of the rubber sheet 2 is set as a smooth surface. A plurality of mushroom head columns 4 are evenly arranged on the long side surface of the rubber sheet 2. A through hole is arranged at the center of the rubber sheet 2. The smooth surface is laid flat at the bottom of the forming groove of the lower mold 6. The heads of the mushroom head columns 4 point to the upper mold 5. The through hole passes through the positioning stud 8. Press while laying to ensure that the rubber sheet 2 is completely attached to the edge of the forming groove of the lower mold 6, preventing the leakage of polyurethane foaming material during pouring. The structure of the rubber sheet 2 is as Figure 1 shown.

[0042] Measure the temperature inside the mold cavity. When the temperatures inside the upper mold 5 and the lower mold 6 are 36 °C, start preparing for the pouring work. Set the rotation speed of the high-pressure foaming machine to 1700 r / min, and set the mixing ratio of the black material and the white material to 1 - 1:1.3. Mix the black material and the white material in the high-pressure foaming machine and then pour them into the inner cavity of the lower mold 6. Immediately scrape the foaming material with a fine spoon to evenly disperse the mixed foaming material in the mold cavity. Then quickly close the mold and put it into the curing furnace for curing and forming. The foaming material forms a foam body 3. After forming, demold to obtain the adapter body. The preferred mass ratio of the black and white materials mixed is 1:1.2.

[0043] As Figure 5 shown, positioning studs 8 are arranged in the middle of each forming groove of the lower mold 6. In addition to being used for positioning with the through hole of the rubber sheet 2, they also make the foaming material form a circular groove during the forming process as the interface with the aircraft connector.

[0044] After closing the mold, push the mold into the curing furnace for curing and forming. The curing temperature is 80 ± 5 °C, and the curing time is 0.5 - 1 h.

[0045] After the curing is completed, wait for the mold temperature to cool below 35 °C, then demold and repair the flash and burrs of the adapter body.

[0046] S4, Grid cloth pasting:

[0047] Cut the grid cloth 1 according to the size of the smooth surface of the rubber sheet 2. Then evenly apply an adhesive on the smooth surface of the rubber sheet 2. Paste the cut grid cloth 1 on the smooth surface of the rubber sheet 2 and place it in a normal temperature environment for curing. Cure at normal temperature for 1 - 1.5 h to complete the assembly of the adapter. The adhesive includes one or more of 521 glue, DP460 glue, 406 glue, and 302 glue.

[0048] Subsequently, laser engraving can be carried out on the side of the adapter according to the design requirements. Finally, inspect it to check the external dimensions, appearance quality, protruding height of the positioning pins, and assembly situation of the adapter.

[0049] The internal structure of the formed adapter is as Figure 2 shown. The shape of the formed adapter is consistent with the shape of the inner cavity after the integral molding die is closed. Its structure includes a mesh cloth 1, a rubber plate 2 and a foam body 3. The mesh cloth 1 is connected to the smooth surface of the rubber plate 2. The long side surface of the rubber plate 2 is connected to the short side surface of the foam body 3. The mushroom head column 4 extends into the foam body 3 from the short side surface of the foam body 3. The height of the mushroom head column 4 is 1-3 mm, and the diameter is 1-3 mm. The mushroom head columns 4 are evenly distributed on the rubber plate 2. The structure characteristics of the head of the mushroom head column 4 are used to tightly connect with the foam body 3, and the foam body 3 tightly wraps the mushroom head column 4, so as to increase the adhesion between the rubber plate 2 and the foam body 3, avoid the problem of inconsistent overall thickness of the final adapter caused by pasting with glue later, and at the same time enhance the reliability of the overall structure of the adapter.

[0050] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention. Any equivalent structural transformation made under the concept of the present invention by using the content of the specification and drawings of the present invention, or directly / indirectly applied in other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. A method for manufacturing an integrally formed aircraft adapter, characterized in that: It includes the following steps: S1, Batching: Adjust the temperature of the batching room to 25±2°C, adjust the humidity of the batching room to less than 60%, prepare the foaming white material, pump the prepared white material into the white tank of the high-pressure foaming machine at a temperature of 23°C, and at the same time pump the foaming black material into the black tank of the high-pressure foaming machine at a temperature of 22°C; S2, Pretreatment: Use the one-piece forming mold for the aircraft adapter. The one-piece forming mold includes an upper mold (5) and a lower mold (6). After evenly applying the mold release agent in the forming grooves of the upper mold (5) and the lower mold (6), place the upper mold (5) and the lower mold (6) in an oven at a temperature of 60°C and preheat for 0.5 hours and then take out; S3, One-piece forming: Place the rubber plate (2) at the bottom of the lower mold (6). When the temperature of the forming grooves of the upper mold (5) and the lower mold (6) is 36°C, set the rotation speed of the high-pressure foaming machine to 1700 r / min, and set the mixing ratio of the black material and the white material to 1~1:1.3; Pour the mixture into the forming groove of the lower mold (6), and immediately spread it evenly, then quickly close the mold, and put it into the curing furnace for curing and forming. After forming, demold to obtain the adapter body; S4, Grid cloth pasting: After cutting the grid cloth (1), fix it on the adapter body with an adhesive. After normal temperature curing for 1-1.5 h, complete the assembly of the adapter.

2. The method for manufacturing an integrally formed aircraft adapter according to claim 1, wherein: In the S1 batching step, the white material includes the following components: polyether, flame retardant and foaming agent. The mixing ratio of the white material is 1:0.1:0.1 in sequence, and the black material is isocyanate.

3. The method for manufacturing the one-piece aircraft adapter according to claim 1, characterized in that: In the S2 pretreatment step, the bottom of the forming groove of the upper mold (5) is set to be an inner concave semi-circular arc, and a plurality of exhaust holes (7) are provided around the bottom and at the center of the forming groove of the upper mold (5).

4. The method for manufacturing an integrally formed aircraft adapter according to claim 3, wherein: In the S2 pretreatment step, through grooves (9), disassembly and assembly covers (10) and positioning dowels (8) are provided at the bottoms of two adjacent forming grooves in the width direction of the lower mold (6). The disassembly and assembly cover (10) is installed on the through groove (9), and the positioning dowel (8) passes through the disassembly and assembly cover (10) and is installed at the center of the bottom of the forming groove of the lower mold (6), and the head points to the upper mold (5).

5. The method for manufacturing an integrally formed aircraft adapter according to claim 4, wherein: In the S3 one-piece forming step, the short side surface of the rubber plate (2) is set to be a smooth surface, a plurality of mushroom head columns (4) are evenly arranged on the long side surface of the rubber plate (2), and a through hole is provided at the center of the rubber plate (2); The smooth surface is laid flat at the bottom of the forming groove of the lower mold (6), the head of the mushroom head column (4) points to the upper mold (5), and the through hole passes through the positioning dowel (8).

6. The method for manufacturing an integrally formed aircraft adapter according to claim 5, characterized in that: Both the upper mold (5) and the lower mold (6) are provided with 4 forming grooves, and are symmetrically distributed in a cross shape. After the upper mold (5) and the lower mold (6) are closed, a closed cavity is formed, and 4 identical adapters can be formed simultaneously.

7. The method for manufacturing an integrally formed aircraft adapter according to claim 1, wherein: In the S3 one-piece forming step, the temperature of the curing and forming is 80±5°C, and the curing time is 0.5-1 h.

8. The method for manufacturing an integrally formed aircraft adapter according to claim 1, wherein: In the S3 integral molding step, the temperature of the molding mold needs to be below 35° C. during the demoulding.

9. The method for manufacturing an integrally formed aircraft adapter according to claim 1, wherein: In the S4 mesh cloth pasting step, the mesh cloth (1) is cut to a size that is consistent with the size of the smooth surface of the rubber plate (2), and is pasted on the smooth surface of the rubber plate (2).

10. The method for manufacturing an integrally formed aircraft adapter according to claim 1, wherein: In the S4 mesh cloth pasting step, the adhesive is one or more of 521 glue, DP460 glue, 406 glue, and 302 glue.

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