Preparation method of heat insulation aluminum alloy composite profile

Abstract

The invention relates to the technical field of aluminum profiles, in particular to a preparation method of a heat insulation aluminum alloy composite profile. Comprising the following steps: injecting 10-40% of polyurethane, 65-78% of a foaming agent, 0-18% of glass fibers and 1-5% of an additive into a space surrounded by an inner edge aluminum profile, an outer edge aluminum profile, a bottom mold frame and an upper mold frame to form a composite part, the composite part is taken out from the space defined by the inner edge aluminum profile, the outer edge aluminum profile, the bottom mold frame and the upper mold frame, the composite part formed through the preparation method contains 10-40% of polyurethane, the deformation resistance strength of the composite part can be improved, compared with a traditional strip-penetrating type heat insulation material, the section length and width can be increased, and the heat insulation performance of the composite part is improved. The heat insulation space is increased, the heat insulation performance is improved, and the problems that an existing heat insulation strip is usually of a strip-penetrating type, the strip-penetrating type section is long, materials are prone to softening, and effective supporting application cannot be achieved; and by adopting a glue injection mode, the volume density is small, and the energy-saving requirement cannot be met.

Description

Technical Field

[0001] The invention relates to the technical field of aluminum profiles, and in particular to a method for preparing a heat-insulating aluminum alloy composite profile. Background Art

[0002] At present, Chinese patent publication number: CN204098703U discloses a sliding aluminum profile, including a left abdominal cavity and a right abdominal cavity, a heat insulation strip is arranged between the left abdominal cavity and the right abdominal cavity, the left abdominal cavity and the right abdominal cavity are stepped, the left abdominal cavity is higher than the right abdominal cavity, and a sound insulation groove is arranged on the vertical surface of the left abdominal cavity higher than the right abdominal cavity, and the upper surfaces of the upper horizontal plates of the left abdominal cavity and the upper horizontal plates of the right abdominal cavity are provided with hook-shaped guide rails, which discloses the existing general strip-through structure profile, or refers to Fig. 9 , which is a glue-injected insulation profile, but the existing insulation strips are usually through-strip type, the through-strip type has a long cross-section and the material is easy to soften, and cannot achieve effective supporting applications; the glue-injected type has a small volume density and cannot meet energy-saving requirements. Summary of the invention

[0003] Therefore, in view of the above problems, the present invention proposes a method for preparing an insulating aluminum alloy composite profile, which solves the technical problems that the existing thermal insulation strips are usually of the through-strip type, the through-strip type has a long cross-section and the material is easy to soften, and cannot be effectively supported and applied; and the injection-type has a small volume density and cannot meet the energy-saving requirements.

[0004] To achieve the above object, the present invention adopts the following technical scheme: a method for preparing a heat-insulating aluminum alloy composite profile, comprising the following steps:

[0005] The first step is to fix the side bonding block on the bottom mold frame. After completion, place the inner aluminum profile and the outer aluminum profile on the first upper raised block and the second upper raised block on the bottom mold frame respectively. Then, apply oil-based paint to the inner aluminum profile, the outer aluminum profile, the bottom mold frame and the surrounding part of the upper mold frame. After completion, place the upper mold frame on the top surface of the inner aluminum profile and the outer aluminum profile.

[0006] In the second step, the material composition ratio of polyurethane 10-40%, foaming agent 65-78%, glass fiber 0-18%, and additive 1-5% is injected into the space surrounded by the inner aluminum profile, the outer aluminum profile, the bottom mold frame and the upper mold frame to form a composite part;

[0007] The third step is to take out the composite part from the space surrounded by the inner aluminum profile, the outer aluminum profile, the bottom mold frame and the upper mold frame after completion.

[0008] Furthermore, in the second step, the polyurethane, foaming agent, glass fiber and additives are mixed and stirred, and the mixed liquid is then injected into the space surrounded by the inner aluminum profile, the outer aluminum profile, the bottom mold frame and the upper mold frame to form a composite part.

[0009] Furthermore, in the second step, the polyurethane material is molded into connecting plates or a rectangular polyurethane outer frame spaced between the upper and lower ends of the inner aluminum profile and the outer aluminum profile. After completion, the connecting plates or the polyurethane outer frame are placed in the inner aluminum profile and the outer aluminum profile, and then the glass fiber filler is placed between the connecting plates or in the polyurethane outer frame, and then the foaming agent is injected between the connecting plates or in the polyurethane outer frame.

[0010] Furthermore, V-shaped edges are provided on both lateral sides of the polyurethane outer frame, and a reinforcing block is provided inside the polyurethane outer frame to fit the V-shaped edges. The reinforcing block is cross-shaped, and a circular tube is provided in the middle of the reinforcing block. The reinforcing block and the circular tube are provided with spaced sections in the middle, and a through hole is provided on the outside of the circular tube.

[0011] By adopting the above technical solution, the beneficial effects of the present invention are:

[0012] The preparation method of the thermal insulation aluminum alloy composite profile, the composite part formed by the preparation method, contains 10-40% of polyurethane, which can increase the deformation resistance of the composite part. Compared with the traditional through-strip thermal insulation material, the cross-sectional length and width can be increased, the thermal insulation space is increased to improve the thermal insulation performance, and at the same time, the foaming layer has a larger injection area and better thermal insulation performance than the existing glue-injected thermal insulation profile, which solves the problem that the existing thermal insulation strips are usually through-strip type, the through-strip type has a long cross-sectional length and the material is easy to soften, and cannot be effectively supported and applied; the injection type has a small volume density and cannot meet the energy-saving requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the structure of the present invention;

[0014] Figure 2 It is a plan view schematic diagram of the structure of the locking mechanism of the present invention;

[0015] Figure 3 It is a schematic plan view of the local structure of the locking mechanism of the present invention;

[0016] Figure 4 It is a structural schematic diagram of embodiment 1 of the present invention;

[0017] Figure 5 is a schematic structural diagram of a composite member in a connection plate state in a second embodiment of the present invention;

[0018] Figure 6 This is a schematic diagram of the structure of a polyurethane outer frame of the composite member of the second embodiment of the present invention;

[0019] Figure 7 is a schematic diagram of the structure of the composite member and the reinforcement block of the second embodiment of the present invention;

[0020] Figure 8 It is a schematic diagram of the V-shaped edge structure of the present invention;

[0021] Fig. 9 It is a schematic diagram of the structure of the existing glue injection type profile of the present invention. DETAILED DESCRIPTION

[0022] The present invention will now be further described with reference to the accompanying drawings and specific implementation methods.

[0023] refer to Figures 1 to 9 This embodiment provides a method for preparing a thermal insulation aluminum alloy composite profile, comprising the following steps:

[0024] The first step is to fix the side bonding block on the bottom mold frame. After completion, place the inner aluminum profile and the outer aluminum profile on the first upper raised block and the second upper raised block on the bottom mold frame respectively. Then, apply oil-based paint to the inner aluminum profile, the outer aluminum profile, the bottom mold frame and the surrounding part of the upper mold frame. After completion, place the upper mold frame on the top surface of the inner aluminum profile and the outer aluminum profile.

[0025] In the second step, the material components: 15% polyurethane, 65% foaming agent, 18% glass fiber, and 2% additive are mixed and injected into the space surrounded by the inner aluminum profile, the outer aluminum profile, the bottom mold frame and the upper mold frame to form a composite part 3. The actual adjustable range of polyurethane is between 10 and 40%, the foaming agent is between 65 and 78%, the glass fiber is 0 to 18%, and the additive is 1 to 5%.

[0026] The third step is to take out the composite part 3 from the space surrounded by the inner aluminum profile, the outer aluminum profile, the bottom mold frame and the upper mold frame after completion.

[0027] The bottom mold frame 100, the side laminating blocks 200 arranged on the lateral sides of the bottom mold frame, the first upper protruding block 300 arranged on the top surface of the left side of the side laminating block, the second upper protruding block 400 arranged on the top surface of the right side of the side laminating block, the upper mold frame 500 arranged above the bottom mold frame at intervals, the first lower protruding block 600 arranged on one side of the bottom surface of the upper mold frame, the second lower protruding block 700 arranged on the other side of the bottom surface of the upper mold frame, the inner aluminum profile 1 arranged between the bottom mold frame and the upper mold frame and located at the positions of the first upper protruding block and the first lower protruding block, the outer aluminum profile 2 arranged between the bottom mold frame and the upper mold frame and located at the positions of the second upper protruding block and the second lower protruding block, and the clamping mechanism 800 arranged on both sides of the middle of the bottom mold frame;

[0028] The locking mechanism includes a horizontal block 801, an upper module 802 arranged on the top of the horizontal block 801, a first side module 803 slidably arranged on one side of the upper module 802, a second side module 804 slidably arranged on the other side of the upper module 802, a first driving block 805 rotatably arranged in the horizontal block 801 and located at the bottom of the upper module 802, a second driving block 806 rotatably arranged at the bottom of the upper module 802 away from the first driving block 805, a first connecting rod 807 hingedly arranged on the bottom surface of the first driving block 805, a second connecting rod 808 hingedly arranged at the bottom of the second driving block 806, a third connecting rod 809 arranged at the bottom of the first connecting rod 807 and the second connecting rod 808, and an electric motor for driving the third connecting rod 809 to rotate. The upper module 802 comprises a first link rod 807 and a second link rod 808, wherein the first link rod 807 and the second link rod 808 are hinged at the bottom, one side of the first side module 803 is provided with two sets of first linkage rods 812 arranged in parallel, the second side module 804 is provided with two sets of second linkage rods 813 arranged in parallel on the side close to the first side module 803, a moving rod 814 is provided at the connection between the first linkage rod 812 and the second linkage rod 813, a pulley 815 is provided at the top of the moving rod 814, a through hole 816 is provided in the middle part of the upper module 802 for the moving rod 814 to pass through, and a covering mechanism is provided at the through hole 816 of the upper module 802.

[0029] When in use, when the motor drives the third connecting rod to rotate, the third connecting rod drives the first connecting rod and the second connecting rod to rotate upward. During the upward rotation of the first connecting rod and the second connecting rod, the first driving block and the second driving block rotate upward ninety degrees, and drive the first side module and the second side module to move to both sides during the flipping process. After the composite part is injection molded in the space surrounded by the inner aluminum profile, the outer aluminum profile, the bottom mold frame and the upper mold frame, the motor continues to rotate, and the third connecting rod drives the first connecting rod and the second connecting rod to move downward, and the first driving block and the second driving block rotate back to the initial state. The first side module and the second side module move toward the middle under the action of the spring. At this time, the first side module and the second side module shrink into the upper module without interfering with the composite part. The one side module and the second side module drive the first linkage rod and the second linkage rod to extrude toward the middle, and the moving rod connected to the first linkage rod and the second linkage rod moves upward, and the pulley on the top of the moving rod will pass through the covering mechanism to lift the composite part to contact it, which can reduce the contact area between the composite part and the bottom mold frame. After forming, it can be taken out together with the inner aluminum profile and the outer aluminum profile at the same time. When the inner aluminum profile and the outer aluminum profile are fixed and not taken out, after the composite part is formed, the pulley directly lifts the composite part, and the composite part is easier to take out. After the composite part contacts the pulley, the area of ​​release from the bottom mold frame is small. During the movement of the composite part, the friction with the bottom mold frame is small, the bottom surface of the composite part is smoother, and less debris falls on the bottom mold frame, which is convenient for later cleaning and improves the quality of the finished product.

[0030] The covering mechanism comprises a first cover plate 817 and a second cover plate 818 of the upper module 802 located at the through hole 816, and a linkage mechanism is provided at the bottom of the first cover plate 817 and the second cover plate 818, and the linkage mechanism comprises a first connecting block 819 provided at the through hole 816 of the upper module 802, a first covering rod 820 provided at a side of the first connecting block 819 away from the upper module 802, a second connecting block 821 provided at intervals above the first connecting block 819, a second covering rod 822 rotatably provided on the second connecting block 821, a third covering rod 823 provided on the first connecting block 819 and rotatably connected to one end of the second covering rod 822, a fourth covering rod 824 provided on the second connecting block 821 and rotatably connected to the first covering rod 820, and a torsion spring 825 for driving the first covering rod 820 to rotate;

[0031] When the pulley squeezes the first cover plate and the second cover plate, the connection between the first cover and the second cover plate will be pushed open, and the pulley protrudes from the first cover and the second cover plate. When the pulley descends, under the action of the spring, the angle between the first covering rod and the second covering rod decreases, and the second connecting block will move downward to the top surface of the first connecting block, and the first cover plate and the second cover plate will cover the perforations of the upper module, which is convenient for use with the pulley.

[0032] Example 1, please refer to Figure 4 In the second step, the polyurethane, foaming agent, glass fiber and additives are mixed and stirred, and then the mixed liquid is injected into the space surrounded by the inner aluminum profile, the outer aluminum profile, the bottom mold frame and the upper mold frame to form a composite part. Figure 4 The composite part is conducive to mass production and has certain strength.

[0033] Example 2, please refer to Figures 5 to 8 In the second step, the polyurethane material is molded into connecting plates or rectangular polyurethane outer frames spaced at the upper and lower ends of the inner aluminum profile 1 and the outer aluminum profile 2. After completion, the connecting plates or the polyurethane outer frames are placed in the inner aluminum profile 1 and the outer aluminum profile 2, and the glass fiber filler is placed between the connecting plates or in the polyurethane outer frames, and then the foaming agent is injected between the connecting plates or in the polyurethane outer frames.

[0034] The composite component 3 is detachably connected to the inner aluminum profile 1 and the outer aluminum profile 2 respectively; the inner aluminum profile 1 is provided with an inner hanging portion 101 on a side close to the composite component 3; an inner hook 102 is provided on the inner hanging portion 101 near the middle of the inner aluminum profile 1; the outer aluminum profile 2 is provided with an outer hanging portion 201 on a side close to the composite component 3; the outer hanging portion 201 is provided with an outer hook 202 near the middle of the outer aluminum profile 2; the composite component 3 comprises a polyurethane outer frame 301 and a foaming layer 302 filled on the inner side of the polyurethane outer frame 301; a left inner groove 303 cooperating with the inner hanging portion 101 and the inner hook 102 on the inner aluminum profile 1 is provided on one lateral side of the polyurethane outer frame 301; a right inner groove 304 cooperating with the outer hanging portion 201 and the outer hook 202 on the outer aluminum profile 2 is provided on the other lateral side of the polyurethane outer frame 301.

[0035] The setting of the foam layer can increase the deformation resistance of the polyurethane frame. Compared with the traditional strip-type thermal insulation material, the cross-sectional length and width can be increased, and the thermal insulation space is increased to improve the thermal insulation performance. At the same time, because the interior is filled with the foam layer, compared with the existing glue-injected thermal insulation profiles, the glue injection area is larger and the thermal insulation performance is better.

[0036] The polyurethane outer frame 301 is a connecting plate spaced between the upper and lower ends of the inner aluminum profile 1 and the outer aluminum profile 2, and the foaming layer 302 is arranged between the connecting plates. Figure 1 When it is a connecting plate spaced at the upper and lower ends, the amount of polyurethane outer frame material is small, and it needs to be glued and fixed with the foam layer to increase the bonding strength and the cost is low.

[0037] The polyurethane outer frame 301 is rectangular in shape, and the foaming layer 302 is arranged in the inner groove of the polyurethane outer frame 301. Figure 2 In this structure, the polyurethane outer frame has high strength, and because the interior is filled with a foam layer, it has good anti-deformation effect and excellent performance.

[0038] The cross-sectional length of the polyurethane outer frame 301 is 25 to 75 cm, and the cross-sectional width of the polyurethane outer frame 301 is 15 to 50 cm. The cross-sectional length of the polyurethane outer frame is preferably 60 cm, and the cross-sectional width is preferably 30 cm. The cross-sectional length and width of the existing thermal insulation aluminum alloy composite profiles are usually 10 to 15 cm. Since they are easy to soften when lengthened or with thermal insulation strips, they are usually set to a smaller size. The length of the composite part can be set to about 60 cm and the width to about 30 cm. The thermal insulation performance of the composite part is increased by injecting a foaming layer into the interior of the composite part. Due to the addition of the volume and the internal foaming layer, the thermal insulation performance is enhanced during use. Moreover, since reinforcing ribs are injected in the middle, even if the length or width of the composite part increases, the reinforcing ribs have a certain hardness support, and by being stuck in the middle of the polyurethane outer frame, the problem of the polyurethane outer frame becoming soft when the cross-sectional length and width increase can be prevented.

[0039] The polyurethane outer frame 301 is provided with a reinforcing rib 4 in the middle of the foaming layer 302. The reinforcing rib 4 is a glass fiber filler and can also be replaced by an existing polymer fiber filler, an iron core plate, an aluminum core plate or other hard materials with the same functions.

[0040] The polyurethane outer frame 301 is provided with V-shaped edges 3a on both sides in the horizontal direction, and the polyurethane outer frame 301 is provided with a reinforcing block 3b in contact with the V-shaped edge 3a. The reinforcing block is in a cross shape, and a circular tube 3c is provided in the middle of the reinforcing block 3b. The reinforcing block and the circular tube are provided with spaced sections 3d in the middle, and a through hole 3e is provided on the outside of the circular tube.

[0041] When in use, first insert the reinforcement block into the V-shaped edge on the inner side of the polyurethane outer frame. The V-shaped edge will fix the reinforcement block. After completion, block the front and back of the reinforcement block, reserve a middle hole at the through-hole position of the reinforcement block, and then insert the foaming agent tube. After the foaming agent reaches the middle of the reinforcement block through the round tube, the inner groove and cross-section position of the polyurethane outer frame are filled to form a foaming layer, and then move it toward the round hole of the round tube to fill the non-cross-section area in the polyurethane outer frame. After filling, remove the front and back blocking positions of the reinforcement block. Compared with the reinforcing rib cross bars, this structure is more convenient for injecting foaming agent. The filling process of the original reinforcing rib cross bars is complicated, and the cross-shaped reinforcement block has higher strength. The reinforcement block is less likely to be deformed and bent under stress. The internal foaming layer is connected and fixed to the reinforcement block due to the cross-section and through-hole, and is less likely to break and fall off from the polyurethane outer frame, greatly extending the service life.

[0042] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0043] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0044] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0045] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0046] Although the present invention has been specifically shown and described in conjunction with the preferred embodiments, it should be understood by those skilled in the art that various changes may be made to the present invention in form and details without departing from the spirit and scope of the present invention as defined by the appended claims, all of which are within the scope of protection of the present invention.

Claims

1. A method for preparing a heat-insulating aluminum alloy composite profile, characterized in that: The following steps are involved: The first step is to fix the side bonding block on the bottom mold frame. After completion, place the inner aluminum profile and the outer aluminum profile on the first upper raised block and the second upper raised block on the bottom mold frame respectively. Then, apply oil-based paint to the inner aluminum profile, the outer aluminum profile, the bottom mold frame and the surrounding part of the upper mold frame. After completion, place the upper mold frame on the top surface of the inner aluminum profile and the outer aluminum profile. In the second step, the material composition ratio of polyurethane 10-40%, foaming agent 65-78%, glass fiber 0-18%, and additive 1-5% is injected into the space surrounded by the inner aluminum profile, the outer aluminum profile, the bottom mold frame and the upper mold frame to form a composite part; The third step is to take out the composite part from the space surrounded by the inner aluminum profile, the outer aluminum profile, the bottom mold frame and the upper mold frame after completion.

2. The method for preparing a heat-insulating aluminum alloy composite profile according to claim 1, characterized in that: In the second step, polyurethane, foaming agent, glass fiber and additives are mixed and stirred, and the mixed liquid is then injected into the space surrounded by the inner aluminum profile, the outer aluminum profile, the bottom mold frame and the upper mold frame to form a composite part.

3. The method for preparing a heat-insulating aluminum alloy composite profile according to claim 1, characterized in that: In the second step, the polyurethane material is molded into connecting plates or rectangular polyurethane outer frames spaced at the upper and lower ends of the inner aluminum profile and the outer aluminum profile. After completion, the connecting plates or the polyurethane outer frames are placed in the inner aluminum profile and the outer aluminum profile, and then the glass fiber filler is placed between the connecting plates or in the polyurethane outer frame, and then the foaming agent is injected between the connecting plates or in the polyurethane outer frame.

4. The method for preparing a heat-insulating aluminum alloy composite profile according to claim 1, characterized in that: The polyurethane outer frame has V-shaped edges on both sides in the transverse direction, and a reinforcing block is provided inside the polyurethane outer frame to fit the V-shaped edges. The reinforcing block is cross-shaped, and a circular tube is provided in the middle of the reinforcing block. The reinforcing block and the circular tube have spaced sections in the middle, and a through hole is provided on the outside of the circular tube.

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