CN109749691B

CN109749691B - Manufacturing method of composite section for doors and windows

Info

Publication number: CN109749691B
Application number: CN201910232537.3A
Authority: CN
Inventors: 陈均脑
Original assignee: Individual
Current assignee: Individual
Priority date: 2018-12-26
Filing date: 2019-03-26
Publication date: 2020-04-14
Anticipated expiration: 2039-03-26
Also published as: CN109913169A; CN109913169B; CN109749691A

Abstract

The invention provides a method for manufacturing a composite section for doors and windows, which comprises the following steps: preparing a non-metal plate; preparing a metal section, wherein the metal section is made of light alloy; applying an adhesive on the surface of the non-metal plate or the metal section, and assembling according to a preset assembly structure to obtain a composite section plate blank, wherein the preset assembly structure is that the non-metal plate is arranged on at least one side of the metal section; pressing the composite section bar plate blank into a shape, and releasing pressure to obtain a semi-finished composite section bar; and carrying out post-treatment on the semi-finished composite section to obtain a finished composite section. The composite section for doors and windows is prepared by compounding the non-metal plate and the metal section, so that the structural strength of the composite section is ensured, and the heat insulation performance of the composite section is improved.

Description

Manufacturing method of composite section for doors and windows

Technical Field

The invention relates to the technical field of doors and windows, in particular to a manufacturing method of a composite section for doors and windows.

Background

The building enclosure structure is composed of an outer wall, a roof and doors and windows, and the windows which account for 20% -30% of the whole building area are the parts which emit the most heat, so to speak, weak links in the building enclosure structure. The control of door and window energy consumption is the key to improve the energy saving of buildings.

Most aluminum alloy sections are hollow structures, have light specific gravity, are 70 times lighter than bricks with the same volume, and are only 1/3 made of stainless steel. The aluminum profile has the characteristics of short production period, excellent mechanical property, good processing property and the like, and can finish the production of complex shapes because the aluminum profile can be bent at will or formed at one time and has high processing precision. The wood as a renewable natural resource has the characteristics of low thermal conductivity, high sound insulation, easy processing and the like. As is well known, aluminum alloy sections have high thermal conductivity, but wood has good heat insulation effect. The wood and the aluminum alloy material have various advantages in the aspect of performance, so that the wood and the aluminum alloy material are considered to be combined to make up for the deficiencies and exert the potential value of the material.

Among the prior art, an aluminum-wood composite window structure is that the aluminum alloy owner frame is independent component, bears door and window's structural strength, and aluminum frame and wooden frame are makeed respectively, are gone on through nylon buckle or plastic-bridge connection at last, but the clearance between the aluminum-wood easily produces the dewfall phenomenon, and is unfavorable to timber protection. The aluminum-wood composite door and window is characterized in that an aluminum alloy section is adopted outside a finished product window, a wood section is adopted inside the finished product window, the wood section on the inner side bears the structural strength of the door and window, and the aluminum alloy section is arranged on the outer side of the wood section and is waterproof, dustproof, ultraviolet-proof and the like; the wood section also has the effects of heat preservation, humidity regulation and higher decoration; however, the wood profile is complex to process and has high requirements on the quality of wood materials.

Secondly, the composite material (especially the composite of metal and wood) has low adhesion, so the composite material can be cracked and degummed when being bonded by using the adhesive, no specific adhesive aiming at the composite material of metal and wood exists in the market at present, and most adhesives have general adhesion, short service life and carry harmful substances which can cause environmental pollution. For example, chinese patent publication No. CN103773284B, published 7/8/2015, discloses a weather-resistant water-based adhesive which has a low adhesion and is not suitable for metal-wood composite materials, and a method for producing the same.

In addition, the aluminum-wood composite material obtained by the adhesive and the process in the prior art can only be used for room interior decoration, such as kitchen and sliding doors of toilets, and cannot be used for external doors and windows, because the temperature difference between the inside and the outside of the external doors and windows is large, the aluminum-wood composite material is easy to warp, deform and crack, and the outside is exposed to the sun and rain, the adhesive is easy to age, and the aluminum-wood composite material is easy to crack.

Disclosure of Invention

In order to solve at least one technical problem, the first aspect of the present invention discloses a method for manufacturing a composite profile for doors and windows, comprising the steps of:

preparing a non-metal plate, wherein the non-metal plate is a wood material or a wood composite material;

preparing a metal section, wherein the metal section is made of light alloy;

applying an adhesive on the surface of the non-metal plate or the metal section, and assembling according to a preset assembly structure to obtain a composite section plate blank, wherein the preset assembly structure is that the non-metal plate is arranged on at least one side of the metal section;

pressing the composite section bar plate blank into a shape, and releasing pressure to obtain a semi-finished composite section bar;

and carrying out post-treatment on the semi-finished composite section to obtain a finished composite section.

In a second aspect, the present invention provides a method for manufacturing a composite profile for doors and windows, comprising the steps of:

preparing a non-metal plate, wherein the non-metal plate is made of a wood material or a wood composite material;

preparing two metal sectional materials, wherein the metal sectional materials are light alloys;

the material preparation heat insulation piece is positioned between the two metal sectional materials and is used for connecting the two metal sectional materials;

applying an adhesive on the surface of the non-metal plate or the metal section, and assembling according to a preset assembly structure to obtain a composite section plate blank, wherein the preset assembly structure is that the non-metal plate is arranged on one side, away from the heat insulation piece, of at least one metal section;

In a third aspect, the present invention provides a method for manufacturing a composite profile for doors and windows, comprising the steps of:

preparing a metal section, wherein the metal section is made of light alloy and is provided with a pouring cavity;

injecting slurry of a heat insulation material into the pouring cavity, and curing to form a heat insulation piece;

By adopting the technical scheme, the manufacturing method of the composite section for doors and windows has the following beneficial effects:

1) the composite section bar for doors and windows is prepared by compounding the non-metal plate and the metal section bar, and the non-metal plate plays roles in enhancing the heat preservation and insulation performance, the decoration effect and part of the supporting effect of the composite section bar; the metal section is mainly used for bearing wind load and bearing the structural strength of doors and windows. And adjusting the section size according to the design values of tensile strength, compression strength and bending strength of the composite section. In order to ensure the heat insulation performance of the composite section, the non-metal plate with small heat transfer coefficient is selected. Meanwhile, when the application of the composite section bar is considered, the appropriate non-metal section bar can be selected according to the external climate environment, for example, the non-metal plate with the outer side being subjected to surface treatment or the non-metal plate with the outer side being subjected to wood-plastic composite material is used for coating the metal section bar, so that the durability of the composite section bar is improved. In addition, the non-metal plate and the metal section bar are tightly attached through an adhesive, so that the phenomenon of dewing caused by a gap between the non-metal plate and the metal section bar is avoided.

2) The adhesive disclosed by the invention has high activity and polarity, has excellent chemical bonding force with wood and metal profiles, is strong in bonding force, has excellent buffering and damping functions, good hydrolytic stability, good flexibility and extensibility, and good low-temperature resistance, and has the characteristics of low VOC content, no environmental pollution and no combustion.

3) The manufacturing method also provides a composite section with a double heat insulation structure adopting the heat insulation piece and the non-metal plate, has lower heat conductivity coefficient, and is suitable for door and window materials with higher energy-saving requirements; and the interior of the heat insulation piece can be provided with a multi-cavity structure according to needs, so that the effect of multiple insulation on heat flow is achieved, the overall heat conductivity coefficient of the composite section is further reduced, and the overall weight can be reduced.

4) The manufacturing method also provides the composite section with the double heat insulation structure of the heat insulation piece and the non-metal plate, and the heat insulation piece is obtained by pouring through the temporary connecting bridge, so that the assembly difficulty in the assembly process is reduced while the connection strength is ensured.

5) The composite section obtained by the manufacturing method can be used for doors and windows which are directly contacted with the outdoor, cannot crack and deform when being blown by wind, exposed to the sun and rain, has stable performance and long service life.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1(a) is a schematic cross-sectional view of a metal profile according to example 1 of the present invention;

FIG. 1(b) is a schematic view of the structure of an assembly in example 1 of the present invention;

FIG. 1(c) is a schematic view of a finished composite profile according to example 1 of the present invention;

FIG. 2(a) is a schematic cross-sectional view of a metal profile according to example 2 of the present invention;

FIG. 2(b) is a schematic view of the structure of an assembly in example 2 of the present invention;

FIG. 2(c) is a schematic view of a finished composite profile according to example 2 of the present invention;

FIG. 3(a) is a schematic cross-sectional view of a metal profile according to example 3 of the present invention;

FIG. 3(b) is a schematic sectional view of an insulating member according to example 3 of the present invention;

FIG. 3(c) is a schematic view showing the assembly of the metal profile and the heat insulator according to example 3 of the present invention;

FIG. 3(d) is a schematic view of the structure of the assembly of example 3 of the present invention;

FIG. 3(e) is a schematic view of a finished composite profile of example 3 of the present invention;

FIG. 4 is a schematic view of a finished composite profile according to example 4 of the present invention;

FIG. 5 is a schematic view of a finished composite profile according to example 5 of the present invention;

FIG. 6 is a schematic view of a finished composite profile according to example 6 of the present invention;

FIG. 7(a) is a schematic sectional view of a metal profile according to example 7 of the present invention;

FIG. 7(b) is a schematic cross-sectional view of a casting slurry to form an insulation element according to example 7 of the present invention;

FIG. 7(c) is a schematic view of the structure of an assembly in accordance with example 7 of the present invention;

FIG. 7(d) is a schematic view of a semi-finished composite profile of example 7 of the present invention after being milled;

FIG. 7(e) is a schematic view of a finished composite profile according to example 7 of the present invention;

FIG. 8 is a schematic view of a finished composite profile according to example 8 of the present invention;

the following is a supplementary description of the drawings:

101-a non-metallic plate; 102-a metal profile;

201-non-metallic plate material; 202-metal section bar; 203-thermal insulation; 204-a cavity structure;

301-non-metallic sheet material; 302-metal profile; 303-pouring a cavity; 304-slurry; 305 — insulation; 306-temporary connecting bridges.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic may be included in at least one implementation of the invention. In the description of the present invention, it is to be understood that the terms "upper", "lower", "top", "bottom", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. Moreover, the terms "first," "second," and the like are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein.

The non-metallic material referred to in the present invention broadly refers to a wood material or wood composite material, which is mainly a material with a low thermal conductivity coefficient. The non-metal plate is solid wood or artificial board or wood-plastic composite material. The solid wood board is a wood material which is sawn into wood materials, and the width of the wood material is more than 2 times of the thickness of the wood material. The wood-based panel is a panel which is made by pressing wood or other plant fibers as raw materials under a certain condition through a special process with or without adhesive; such as plywood, fiberboard, flakeboard, reconstituted wood, reconstituted bamboo, wood (bamboo) strip laminated lumber (PSL), laminated lumber and the like. The wood-plastic composite material is prepared by filling, reinforcing, modifying and blending waste wood fibers, plant fibers, thermoplastic plastics and the like. The wood-plastic composite material after the mixing modification is processed into the required non-metal plate by a special single-screw extruder or a double-screw extruder and matching with a corresponding die and an auxiliary forming machine.

The metal section material is light alloy, wherein the light alloy is formed by two or more than two kinds of metal sections with the density less than or equal to 4.5g/cm³An alloy obtained by alloying the metal elements (e.g., aluminum, magnesium, titanium, etc.). Such as an aluminum alloy.

The following describes the manufacturing method of the composite section bar for doors and windows in the embodiment with reference to the attached drawings.

Example 1:

fig. 1(a) shows a cross section of one metal profile of the embodiment, and fig. 1(b) shows a blank structure of the embodiment 1; fig. 1(c) shows a schematic view of the finished composite profile of this embodiment. Referring to fig. 1(a) to 1(c), the embodiment provides a method for manufacturing a composite profile for doors and windows, including the steps of:

preparing a non-metal plate 101, wherein the non-metal plate 101 is made of a wood material or a wood composite material;

preparing a metal profile 102, as shown in fig. 1(a), wherein the metal profile 102 is made of a light alloy;

applying an adhesive on the upper and lower surfaces of the metal profile 102, and assembling according to a preset assembly structure to obtain a semi-finished composite profile, wherein the preset assembly structure is that the upper and lower sides of the metal profile 102 are both provided with the non-metal plates 101, as shown in fig. 1 (b);

and (c) pressing the semi-finished composite section for a preset time, and releasing the pressure to obtain a finished composite section, as shown in fig. 1 (c). In a possible embodiment, the adhesive may be applied to the surface of the non-metal plate 101.

The composite section bar for doors and windows is prepared by compounding the non-metal plate and the metal section bar, and can be used as a frame structure material of doors and windows, such as a frame, a sash, a stile and the like. The non-metal plate plays roles in enhancing the heat preservation and insulation performance, the decoration effect and the partial support effect of the composite section; the metal section is mainly used for bearing wind load, bearing the structural strength of doors and windows and providing enough deformation-resistant rigidity. And adjusting the section size according to the design values of tensile strength, compression strength and bending strength of the composite section. In order to ensure the heat insulation performance of the composite section, the non-metal plate with small heat transfer coefficient is selected. Meanwhile, when the application of the composite section bar is considered, the appropriate non-metal section bar can be selected according to the external climate environment, for example, the non-metal plate with the outer side being subjected to surface treatment or the non-metal plate with the outer side being subjected to wood-plastic composite material is used for coating the metal section bar, so that the durability of the composite section bar is improved. In addition, the non-metal plate and the metal section bar are tightly attached through an adhesive, so that the phenomenon of dewing caused by a gap between the non-metal plate and the metal section bar is avoided.

The adhesive comprises the following components in percentage by weight: 48-52% of isocyanate, 28-32% of polyether polyol, 8-12% of diluting solvent, 9.6-10% of tackifier and 0.1-0.3% of catalyst, wherein the catalyst is used for catalyzing the polymerization reaction of the isocyanate and the polyether polyol. The polyether polyol, the diluting solvent and the tackifier can act synergistically, so that a large number of bubbles are generated in the adhesive, the apparent density is reduced, the coating performance, the low-temperature resistance, the softness of an adhesive layer, the operable time and the bonding strength are improved. The adhesive has high activity and polarity, has excellent chemical bonding force with wood and metal profiles, not only has strong bonding force, but also has excellent buffering and damping functions, good hydrolytic stability, better flexibility and extensibility, and good low-temperature resistance, and in addition, the adhesive also has the characteristics of low VOC content, no environmental pollution and no combustion.

The adhesive is a polyurethane adhesive, the active ingredient of the adhesive is a urethane group, the polyurethane adhesive is formed by polymerizing isocyanate and polyether polyol, the polyether polyol contains a large number of active hydrogen atoms, when the isocyanate reacts with the polyether polyol, an oxygen atom in a-N ═ C ═ O group receives the active hydrogen atoms to form hydroxyl groups, but the hydroxyl groups on unsaturated carbon atoms are unstable, and the urethane groups are generated through intramolecular rearrangement. Due to the existence of urethane groups, the adhesive has high activity and polarity, and has excellent chemical bonding force with substrates containing active hydrogen, such as porous materials of wood, foam, plastic and the like, and materials with smooth surfaces of metal, glass, rubber and the like.

In a possible embodiment, the diluting solvent may be ethyl acetate, the catalyst may be organotin, and the tackifier is rosin.

In the preparation process of the adhesive, the ratio of the content of a hydroxyl component (namely polyether polyol) to the content of an isocyanate component (namely isocyanate) has a great influence on the performance of the adhesive, and if the content of the isocyanate component in the adhesive is excessive, the adhesive can be incompletely cured or a cured adhesive layer is hard and even brittle; if the hydroxyl component is too much, problems of soft adhesion, low cohesion, and poor adhesive strength of the adhesive layer may occur. The temperature during bonding also affects the performance of the adhesive, and within a certain temperature range, the bonding temperature is increased, so that the viscosity of the adhesive is reduced, and the cured bonding layer is softer. The adhesive layer is too hard and too soft, which is not favorable for the adhesive to keep the bonding effect. Table 1 shows ten ratios of the adhesive, and the optimal curing temperatures and curing times of different ratios are different, and it should be noted that the adhesive of the present invention is not limited to the ratios in table 1.

Table 1 various ratios of the adhesives

Taking the first mixture ratio as an example, the adhesive comprises the following components in percentage by weight: 50% of isocyanate, 30% of polyether polyol, 10% of ethyl acetate, 9.8% of rosin and 0.2% of organic tin catalyst; the first proportion is the optimal proportion used at the normal temperature of 25 ℃, and is suitable for being used in the normal temperature environment.

Taking the second mixture ratio as an example, the adhesive comprises the following components in percentage by weight: 48 percent of isocyanate, 32 percent of polyether polyol, 10 percent of ethyl acetate, 9.8 percent of rosin and 0.2 percent of organic tin catalyst; the ratio is the optimal ratio under the environment of 0 ℃, and the bonding layer after the adhesive is cured is harder due to low temperature, so that the content of hydroxyl components in the adhesive is increased, the viscosity of the adhesive is reduced, the bonding layer after the adhesive is cured is not too hard, and the adhesive is suitable for being used under the low-temperature environment.

Taking the third mixture ratio as an example, the adhesive comprises the following components in percentage by weight: 52% of isocyanate, 28% of polyether polyol, 10% of ethyl acetate, 9.8% of rosin and 0.2% of organic tin catalyst; the ratio is the best ratio under the environment of 50 ℃, and the bonding layer of the adhesive is too soft and sticky due to high temperature, and the bonding strength is poor, so that the content of isocyanate-based components in the adhesive is increased, the bonding layer after the adhesive is cured is not too soft and sticky, the bonding strength is not influenced, and the adhesive is suitable for being used under the high-temperature environment.

The press-molding temperature is related to the proportion of the adhesive. If the adhesive in the first ratio is selected, the temperature for press molding can be room temperature, and therefore cold pressing can be selected. The press-molding time is related to the amount of applied adhesive, the curing speed of the adhesive, the ambient temperature and the like. The pressure of the press forming is related to the glue application amount, the bearing strength of the metal section, the density and the thickness of the non-metal plate and the like. For example, in a possible embodiment, cold pressing may be performed at room temperature for 15 hours using a pressure of 14.27 MPa.

The prepared non-metal plate 101 specifically comprises the following steps:

selecting a non-metal raw material plate;

cutting the non-metal raw material plate into a first preset size;

sanding the nonmetal raw material plate with the first preset size to set the thickness to be a first preset thickness;

trimming the nonmetal raw material plate with the first preset thickness to a first preset width to obtain the nonmetal plate 101.

Specifically, in a possible embodiment, the stock preparation non-metal plate material 101 includes the steps of:

s1, selecting scarless wood with the width of 10 cm and the thickness of 2.5 cm;

s2, sawing the wood to 9.3 cm in width on a sliding table saw, and frame-sawing the wood to 11 mm in thickness on a frame sawing machine;

s3, putting the frame-sawed timber on a sander to sand until the thickness of the timber is 9 mm;

s4, moving the wood to an edge trimmer for fine trimming until the width is 8.5 cm, and finally obtaining the nonmetal plate 101 with the width of 8.5 cm and the thickness of 9 mm;

the preparation of the metal profile 102 comprises the steps of:

selecting a metal section 102 with a smooth surface, and cutting the metal section into a second preset size; wherein the width of the metal profile 102 is equal to the first preset width.

The step of selecting the metal profile 102 may further include the following steps:

the metal section bar 102 is subjected to pretreatment including derusting treatment and degreasing treatment.

The degreasing treatment may be performed by washing with an alkaline solution containing a surfactant and an organic solvent, followed by washing with water and drying, or may be performed by direct washing with an organic solvent. The organic solvent is acetone, carbon tetrachloride or ethanol. The compatibility between grease on the metal surface and the adhesive is poor, and the existing moisture reacts with-N ═ C ═ O groups in the adhesive to generate bubbles, so that the contact surface area of the adhesive and the metal is reduced, and the cohesive force of an adhesive layer is reduced, therefore, the surface cleaning and drying treatment is required before the adhesion.

And selecting a corresponding rust removal method according to the type of the alloy of the metal section, such as one or a combination of a plurality of chemical immersion method, ultrasonic method, electrochemical rust removal method, mechanical rust removal method and manual rust removal method. The chemical soaking method for removing rust is to soak the metal workpiece in the corresponding rust removing solution, and the chemical reaction of chemical substances such as acid, alkali and the like in the solution with the oxide skin, rust products and the like on the surface of the workpiece is utilized to dissolve the oxide skin, the rust products and the like in the solution, so that the aim of removing rust is fulfilled. The chemical soaking and ultrasonic wave method is characterized in that when the chemical soaking method is used for removing rust, ultrasonic waves are introduced at the same time, so that the speed and the effect of removing the rust can be improved; countless small bubbles are generated in the derusting liquid by utilizing the mechanical energy of ultrasonic oscillation, and the small bubbles generate strong mechanical force when being formed, grown and closed, so that oxide skin and rust dirt on the surface of a workpiece are quickly separated, the derusting process is accelerated, and the derusting is more thorough. The electrochemical rust removal method is characterized in that when the rust removal is carried out by a chemical immersion method, current is added at the same time, so that the speed and the effect of rust removal can be improved; with the aid of direct current (or with alternating current), the metal workpiece can be machined either on the anode or on the cathode. Mechanical rust removal methods include sand blasting, shot blasting, high pressure blasting, and the like. The manual rust removing method uses a rust hammer to remove thick rust and uses a scraper to remove a thin rust layer.

After the metal section bar 102 is pretreated, the method may further include the steps of:

and polishing the bonding surface of the metal section 102 with the second preset size to form preset textures so as to increase the adhesive force of the adhesive.

Specifically, the polishing is performed to form the preset texture, that is, the bonding surface of the metal section 102 with the second preset size is polished in at least one direction to form the preset texture.

Preferably, the bonding surface of the metal section 102 with the second preset size is polished along the width direction of the metal section to form the preset texture; the preset texture is used for discharging air bubbles and redundant adhesive in the process of pressure forming.

In a possible embodiment, the polishing to form the preset texture specifically includes polishing the bonding surface of the metal section 102 with the second preset size along two orthogonal directions to form the preset texture, where the preset texture is a cross concave texture. Namely, the upper and lower surfaces of the metal section bar 102 are vertically polished by sand paper, and then horizontally polished by sand paper after polishing, so as to form horizontally and vertically crossed concave grains to increase the adhesive force of the adhesive; the sandpaper is 320 mesh sandpaper. The 320 sand paper has moderate thickness, large friction force during use and can form concave patterns with proper size.

In other possible embodiments, the grinding can be performed in at least three directions to form the predetermined texture.

The method can further comprise the following steps before the composite section plate blank is pressed and molded: the composite profile slab is nailed from the outside of the non-metallic plate material 101 toward the metallic profile 102 to reinforce the joint strength between the non-metallic plate material 101 and the metallic profile 102.

In other possible embodiments, the step of press-forming the composite profile slab may further include: and performing nail gun operation on the semi-finished composite profile from the outer side of the non-metal plate 101 to the direction of the metal profile 102 so as to reinforce the connection strength of the non-metal plate 101 and the metal profile 102.

The nail gun operation can be flexibly arranged according to the breadth of the composite section, and the number of the nail gun operation is not too large, so that a heat bridge is not formed, and the heat insulation performance is not influenced. Specifically, when the width of the non-metal plate 101 is 8.5 cm and the thickness is 9 mm, 3 nails are respectively driven into the two sides of the composite profile from the outside of the non-metal plate 101 to the direction of the metal profile 102, and the nails are straight nails, model F30. For example, F30 refers to a straight nail having a length of 30 mm.

The step of post-processing the semi-finished composite section to obtain the finished composite section specifically comprises the following steps:

removing the adhesive overflowing from the edge of the semi-finished composite section in the press-forming process;

and milling the non-metal plate 101 of the semi-finished composite profile to obtain a finished composite profile.

After the step of milling the non-metal plate 101 of the semi-finished composite profile to obtain a finished composite profile, the method further comprises the following steps:

and coating the non-metal plate 101 of the finished composite section bar to protect the non-metal plate 101 and improve the durability of the non-metal plate.

It should be noted that, when the non-metal board is solid wood or artificial board, the water-based paint for wood should meet the specification of water-based wood paint for indoor decoration and finishing in GB/T23999, the finish paint should meet the requirement of C-type paint, the primer paint should meet the requirement of D-type paint, the wet film thickness of the paint film should be 200 μm-300 μm, and the dry film thickness should be 80 μm-120 μm.

In addition, when the non-metal plates in the composite section bar use log sawn timber or artificial plates such as laminated timber and recombined timber, the water content of the timber is required to be controlled to be 8% -13%, and the specific selection of each use area should meet the 3.2 in GB/T6491-1999 and the related regulation of the average water content of the area; correspondingly, the formaldehyde release limit of the artificial board meets the requirement of E1 level in the formaldehyde release limit of the artificial board and products thereof as the indoor decoration and finishing materials of GB 18580.

The damp-heat aging test is a means for evaluating and researching the aging resistance and aging rule of various materials under high-temperature and high-humidity environments. An alternating temperature and humidity circulation method is adopted to carry out a damp and hot aging test, namely a high and low temperature alternating damp and hot test box is utilized to carry out a staged circulation test, and a test scheme and the apparent quality result of the test are shown in table 2.

In the experiment, the adhesive is prepared according to the scheme of the first ratio, the assembly structure of the test piece of the composite section is that the nonmetal plates are arranged on the two sides of the metal section, the nonmetal plates are larch, and the preset textures are formed by polishing along the width direction of the metal section. The width of the composite section is 8.5 cm, the length is 25 cm, the height is 10.6 cm, and the thickness of the larch plate is 9 mm.

TABLE 2 aging test protocol and apparent mass results

By combining the adhesive and the preparation method of the composite section bar, the obtained test piece of the composite section bar has the advantages that the adhesive layer is not cracked in a cold-hot cycle alternation test within the range of minus 20 ℃ to 60 ℃, the resistance performance and the aging resistance performance are good, the test piece can be used for doors and windows which are directly contacted with the outdoor, and the test piece can not be cracked and deformed by wind, sunshine and rain, has stable performance and long service life.

Example 2:

fig. 2(a) shows a cross section of one metal profile 102 of the embodiment, and fig. 2(b) shows a blank structure of the embodiment; fig. 2(c) shows a schematic view of the finished composite profile of this embodiment. Referring to fig. 2(a) to 2(c), the present embodiment provides a method for manufacturing a composite profile for doors and windows, including the steps of:

preparing a metal section 102, wherein the metal section 102 is made of light alloy;

applying an adhesive on the upper surface of the metal profile 102, and assembling according to a preset assembly structure to obtain a semi-finished composite profile, wherein the preset assembly structure is that the upper surface of the metal profile 102 is provided with the non-metal plate 101;

and (3) applying pressure to the semi-finished composite section for a preset time, and releasing the pressure to obtain the finished composite section.

Similarly, in a possible embodiment, sizing may be performed on the bonding surface of the non-metal plate 101.

The adhesive comprises the following components in percentage by weight: 48 percent of isocyanate, 32 percent of polyether polyol, 10 percent of ethyl acetate, 9.8 percent of rosin and 0.2 percent of organic tin catalyst; the ratio is the optimal ratio under the environment of 0 ℃, and the bonding layer after the adhesive is cured is harder due to low temperature, so that the content of hydroxyl components in the adhesive is increased, the viscosity of the adhesive is reduced, the bonding layer after the adhesive is cured is not too hard, and the adhesive is suitable for being used under the low-temperature environment.

The press-molding temperature is related to the proportion of the adhesive and the like. The press-molding time is related to the amount of applied adhesive, the curing speed of the adhesive, the ambient temperature and the like. The pressure of the press-forming is related to the glue application amount, the bearing strength of the metal profile 102, the density and thickness of the non-metal plate 101, and the like.

The prepared non-metal plate 101 specifically comprises the following steps:

selecting a non-metal raw material plate;

cutting the non-metal raw material plate into a first preset size;

the preparation of the metal profile 102 comprises the steps of:

selecting a metal section 102 with a smooth surface, and cutting the metal section into a second preset size; wherein the width of the metal profile 102 is equal to the first preset width;

The degreasing treatment may be performed by washing with an alkaline solution containing a surfactant and an organic solvent, followed by washing with water and drying, or may be performed by direct washing with an organic solvent. The rust removing treatment selects a corresponding rust removing method according to the alloy type of the metal section 102, such as one or a combination of a plurality of chemical immersion methods, ultrasonic methods, electrochemical rust removing methods, mechanical rust removing methods and manual rust removing methods.

Specifically, the polishing is performed to form the preset texture, that is, the bonding surface of the metal section 102 with the second preset size is polished in two orthogonal directions to form the preset texture, and the preset texture is a cross concave texture. Namely, the upper and lower surfaces of the metal section bar 102 are vertically polished by sand paper, and then horizontally polished by sand paper after polishing, so as to form horizontally and vertically crossed concave grains to increase the adhesive force of the adhesive; the sandpaper is 320 mesh sandpaper. The 320 sand paper has moderate thickness, large friction force during use and can form concave patterns with proper size.

The method also comprises the following steps before the composite section bar plate blank is pressed and molded: the composite profile slab is nailed from the outside of the non-metallic plate material 101 toward the metallic profile 102 to reinforce the joint strength between the non-metallic plate material 101 and the metallic profile 102.

The nail gun operation can be flexibly arranged according to the breadth of the composite section, and the number of the nail gun operation is not too large, so that a heat bridge is not formed, and the heat insulation performance is not influenced. Specifically, when the width of the non-metal plate 101 is 8.5 cm and the thickness is 9 mm, 3 nails, which are straight nails, model F30, are driven into one side of the composite profile from the outside of the non-metal plate 101 to the direction of the metal profile 102. For example, F30 refers to a straight nail having a length of 30 mm.

The rest of the contents and possible modifications of the scheme are the same as those of embodiment 1, and reference is made to the description of embodiment 1.

Example 3:

fig. 3(a) shows a schematic cross-sectional view of one metal profile of this embodiment; FIG. 3(b) shows a schematic cross-sectional view of an insulation element of this embodiment; fig. 3(c) shows a schematic view of the assembly of the metal profile of this embodiment with the thermal insulation; FIG. 3(d) shows a schematic view of the stack structure of this embodiment; fig. 3(e) shows a schematic view of the finished composite profile of this embodiment. Referring to fig. 3(a) to 3(e), the present embodiment provides a method for manufacturing a composite profile for doors and windows, including the steps of:

preparing a non-metal plate 201, wherein the non-metal plate 201 is made of a wood material or a wood composite material;

preparing two metal profiles 202, wherein the metal profiles 202 are made of light alloy;

a stock material heat insulation piece 203, wherein the heat insulation piece 203 is positioned between the two metal profiles 202 and is used for connecting the two metal profiles 202;

applying an adhesive on the surface of the non-metal plate 201 or the metal profile 202, and assembling according to a preset assembly structure to obtain a composite profile plate blank, wherein the preset assembly structure is that the non-metal plate 201 is arranged on one side, away from the heat insulation piece 203, of the metal profile 202 at the upper part;

Compared with the composite profile of embodiment 1, the composite profile for doors and windows obtained by the manufacturing method of the embodiment adopts the double heat insulation structure of the heat insulation piece 203 and the non-metal plate 201, has lower heat conductivity coefficient, and is suitable for the materials for doors and windows with higher energy-saving requirements.

As shown in fig. 3, there are three heat insulation members 203, and the heat insulation members 203 are connected with the upper and lower metal profiles 202 in a mating manner, i.e. in a plug-and-socket manner. Specifically, the heat insulation piece 203 is provided with a plurality of clamping grooves, one side of the metal section 202 connected with the heat insulation piece 203 is provided with a plurality of clamping pins, and the clamping grooves correspond to the clamping pins one to one. In other possible embodiments, the heat insulating element 203 may also be provided with a plurality of clamping legs, and one side of the metal profile 202 connected to the heat insulating element 203 is provided with a plurality of corresponding clamping grooves.

The adhesive comprises the following components in percentage by weight: 52% of isocyanate, 28% of polyether polyol, 10% of ethyl acetate, 9.8% of rosin and 0.2% of organic tin catalyst. The proportion of the adhesive can be other proportions in the first embodiment.

The prepared non-metal plate 201 specifically comprises the following steps:

selecting a non-metal raw material plate;

cutting the non-metal raw material plate into a first preset size;

trimming the nonmetal raw material plate with the first preset thickness to a first preset width to obtain the nonmetal plate 201.

The preparation of the metal profile 202 comprises the steps of:

selecting a metal section bar 202, and cutting the metal section bar into a second preset size, wherein the width of the metal section bar 202 is equal to the first preset width;

performing pretreatment on the metal section 202, wherein the pretreatment comprises derusting treatment and degreasing treatment;

and polishing the bonding surface of the metal section 202 with the second preset size to form preset textures so as to increase the adhesive force of the adhesive.

The method can further comprise the following steps before the composite section plate blank is pressed and molded: performing a nail gun operation on the composite profile plate blank from the outer side of the non-metal plate 201 to the direction of the metal profile 202 to reinforce the connection strength between the non-metal plate 201 and the metal profile 202;

or, in other possible embodiments, the step of pressing and forming the composite profile slab may further include: and performing nail gun operation on the semi-finished composite section bar from the outer side of the non-metal plate 201 to the direction of the metal section bar 202 to reinforce the connection strength of the non-metal plate 201 and the metal section bar 202.

and milling the non-metal plate 201 of the semi-finished composite section bar to obtain a finished composite section bar.

It should be noted that the heat insulation member 203 may be made of rigid plastic or wood-plastic composite. The hard plastic can be polyamide, polycarbonate, polyformaldehyde, modified polyphenyl ether, thermoplastic polyester and the like. The wood-plastic composite material is prepared by using waste wood materials and waste thermoplastic plastics as main raw materials and carrying out the working procedures of crushing, mixing, melting and fusing, cooling, edge cutting and the like. The wood material further comprises a mixed wood straw fiber material and/or a crop fiber material, the mixed wood straw fiber material comprising at least one of: waste timber, branches, sawdust, straw, wheat straw, corncobs, husks, wheat husks and the like; the waste thermoplastic plastic is plastic formed by randomly mixing waste PP, PE, PVC and PET materials. Preferably, the thermal insulation member 203 has a thermal conductivity of 0.15 to 0.35 (W/m.K). The remaining part of the definition and possible variants can be referred to example 1.

Example 4:

this example differs from example 3 in that both sides of the composite profile have the non-metallic sheet material. Specifically, as shown in fig. 4, a method for manufacturing a composite profile for doors and windows includes the steps of:

applying an adhesive on the surface of the non-metal plate 201 or the surface of the metal section bar 202, and assembling according to a preset assembly structure to obtain a composite section bar plate blank, wherein the preset assembly structure is that the non-metal plate 201 is arranged on one side of each of the two metal section bars 202, which is far away from the heat insulation piece 203;

Example 5:

this embodiment is different from embodiment 3 in that the structure of the heat insulating member 203 is different. As shown in fig. 5, a plurality of cavity structures 204 are arranged inside the heat insulating member 203, and the composite sectional material for doors and windows obtained by the manufacturing method of this embodiment adopts a double heat insulation structure of the heat insulating member 203 and the non-metal plate 201, so that the composite sectional material has a lower heat conductivity coefficient, and is suitable for materials for doors and windows with higher energy-saving requirements; and the multi-cavity structure 204 in the heat insulation piece 203 is distributed perpendicular to the direction of heat flow, so that the heat transfer in the cavity is reduced compared with heat conduction, the effect of multiple insulation on the heat flow is achieved, the overall heat conductivity coefficient of the composite section is further reduced, and the overall weight can be reduced.

Example 6:

the difference between this embodiment and embodiment 4 is that the structure of the heat insulating member 203 is different, specifically, as shown in fig. 6, a plurality of cavity structures 204 are provided inside the heat insulating member 203, and the composite sectional material for doors and windows obtained by the manufacturing method of this embodiment adopts a double heat insulation structure of the heat insulating member 203 and the non-metal plate 201, has a lower thermal conductivity, and is suitable for materials for doors and windows with higher requirements for energy saving; and the multi-cavity structure 204 in the heat insulation piece 203 is distributed perpendicular to the direction of heat flow, so that the heat transfer in the cavity is reduced compared with heat conduction, the effect of multiple insulation on the heat flow is achieved, the overall heat conductivity coefficient of the composite section is further reduced, and the overall weight can be reduced.

Example 7:

fig. 7(a) shows a schematic cross-sectional view of one metal profile of this embodiment; FIG. 7(b) shows a schematic cross-sectional view of the poured grout of this embodiment forming an insulation; FIG. 7(c) is a schematic view showing a stack structure of the embodiment; FIG. 7(d) shows a schematic view of the semi-finished composite profile of this embodiment after being milled; FIG. 7(e) shows a schematic view of a finished composite profile of this embodiment; referring to fig. 7(a) to 7(e), there is provided a method for manufacturing a composite profile for windows and doors, including the steps of:

preparing a non-metal plate 301, wherein the non-metal plate 301 is made of a wood material or a wood composite material;

preparing a metal profile 302, wherein the metal profile 302 is made of light alloy, and the metal profile 302 is provided with a pouring cavity 303;

injecting a slurry 304 of insulating material into the casting cavity 303 and curing to form an insulating element 305, as shown in fig. 7 (b);

applying an adhesive on the surface of the non-metal plate 301 or the metal profile 302, and assembling according to a preset assembly structure to obtain a composite profile plate blank, as shown in fig. 7(c), wherein the preset assembly structure is that the non-metal plate 301 is arranged on the upper surface of the metal profile 302;

pressing and molding the composite section bar plate blank, and releasing pressure to obtain a semi-finished composite section bar, which is shown in a reference figure 7 (c);

and (e) carrying out post-treatment on the semi-finished composite profile to obtain a finished composite profile, as shown in fig. 7(d) and 7 (e).

In a possible embodiment, the post-processing of the semi-finished composite profile to obtain a finished composite profile specifically comprises the steps of:

milling the non-metallic plate 301 of the semi-finished composite profile, as shown in fig. 7 (d);

and cutting off the temporary connecting bridge 306 in the pouring groove of the semi-finished composite profile, and disconnecting the metal connection to obtain the finished composite profile as shown in fig. 7 (e). The post-processing steps are not limited to this order, and the temporary connecting bridge 306 may be cut off first, then the adhesive is removed, and finally the non-metal plate 301 is milled.

Compared with the composite profile of the embodiment 1, the composite profile for doors and windows obtained by the manufacturing method of the embodiment has a lower heat conductivity coefficient by adopting the double heat insulation structure of the heat insulation piece 305 and the non-metal plate 301. And the heat insulation piece 305 is obtained by pouring through the temporary connecting bridge 306, compared with the schemes of the third embodiment to the sixth embodiment, the assembling difficulty in the assembling process is reduced while the connecting strength is ensured.

In a possible embodiment, the adhesive comprises the following components in percentage by weight: 48-52% of isocyanate, 28-32% of polyether polyol, 8-12% of diluting solvent, 9.6-10% of tackifier and 0.1-0.3% of catalyst, wherein the catalyst is used for catalyzing the polymerization reaction of the isocyanate and the polyether polyol. The polyether polyol, the diluting solvent and the tackifier can act synergistically, so that a large number of bubbles are generated in the adhesive, the apparent density is reduced, the coating performance, the low-temperature resistance, the softness of an adhesive layer, the operable time and the bonding strength are improved. The adhesive has high activity and polarity, has excellent chemical bonding force with wood and metal profiles 302, not only has strong bonding force, but also has excellent buffering and damping functions, good hydrolytic stability, better flexibility and extensibility, and good low-temperature resistance, and in addition, the adhesive also has the characteristics of low VOC content, no environmental pollution and non-combustibility.

In a possible embodiment, the prepared non-metal plate 301 specifically includes the steps of:

selecting a non-metal raw material plate;

cutting the non-metal raw material plate into a first preset size;

trimming the nonmetal raw material plate with the first preset thickness to a first preset width to obtain the nonmetal plate 301.

Specifically, in a possible embodiment, the stock preparation non-metal plate 301 includes the steps of:

s4, moving the wood to an edge trimmer for fine trimming until the width is 8.5 cm, and finally obtaining the nonmetal plate 301 with the width of 8.5 cm and the thickness of 9 mm;

in a possible embodiment, the preparation metal profile 302 comprises the steps of:

selecting a metal section 302, and cutting the metal section 302 into a second preset size, wherein the width of the metal section 302 is equal to the first preset width;

performing pretreatment on the metal section 302, wherein the pretreatment comprises derusting treatment and degreasing treatment;

and polishing the bonding surface of the metal section 302 with the second preset size to form preset textures so as to increase the adhesive force of the adhesive.

In a possible embodiment, the polishing to form the preset texture specifically includes polishing the bonding surface of the metal profile 302 with the second preset size along two orthogonal directions to form the preset texture, where the preset texture is a cross concave texture. Namely, the upper and lower surfaces of the metal section 302 are vertically polished by sand paper, and then horizontally polished by sand paper after polishing, so as to form horizontally and vertically crossed concave grains to increase the adhesive force of the adhesive; the sandpaper is 320 mesh sandpaper. The 320 sand paper has moderate thickness, large friction force during use and can form concave patterns with proper size.

In a possible embodiment, the step of press-forming the composite profile slab may further include: the composite profile plate blank is subjected to nail gun operation from the outer side of the non-metal plate 301 to the direction of the metal profile 302, so as to reinforce the connection strength between the non-metal plate 301 and the metal profile 302.

In other possible embodiments, the step of press-forming the composite profile slab may further include: and performing nail gun operation on the semi-finished composite profile from the outer side of the non-metal plate 301 to the direction of the metal profile 302 to reinforce the connection strength of the non-metal plate 301 and the metal profile 302.

In a possible embodiment, the temperature of the press-fit molding is related to the ratio of the adhesive and the like. The press-molding time is related to the amount of applied adhesive, the curing speed of the adhesive, the ambient temperature and the like. The pressure of the press-forming is related to the glue application amount, the bearing strength of the metal section 302, the density and thickness of the non-metal plate 301, and the like.

The heat insulation member 305 is a cast heat insulation member 305, and polyurethane can be used, so that the heat insulation member has stable performance, a small linear expansion coefficient and a small thermal conductivity coefficient. The remaining part of the definition and possible variants can be referred to example 1.

Example 8:

this example differs from example 7 in that: both sides of the composite profile are provided with the non-metallic sheets 301. Specifically, as shown in fig. 8, a method for manufacturing a composite profile for doors and windows includes the steps of:

injecting a slurry 304 of insulating material into the casting cavity 303 and curing to form an insulation 305;

applying an adhesive on the surface of the non-metal plate 301 or the surface of the metal profile 302, and assembling according to a preset assembly structure to obtain a composite profile plate blank, wherein the preset assembly structure is that the non-metal plate 301 is arranged on the upper surface and the lower surface of the metal profile 302;

milling the non-metal plate 301 of the semi-finished composite profile;

cutting off the temporary connecting bridge 306 in the pouring groove of the semi-finished composite section bar to disconnect the metal connection; and obtaining the finished product composite section. The post-processing steps are not limited to this order, and the temporary connecting bridge 306 may be cut off first, then the adhesive is removed, and finally the non-metal plate 301 is milled.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. A manufacturing method of a composite section for doors and windows is characterized by comprising the following steps:

preparing a metal section, wherein the metal section is made of light alloy;

applying an adhesive on the surface of the non-metal plate or the metal section, assembling according to a preset assembly structure to obtain a composite section plate blank, wherein the preset assembly structure is that the non-metal plate is arranged on at least one side of the metal section, the adhesive comprises the following components of 50% by weight of isocyanate, 30% by weight of polyether polyol, 10% by weight of a diluting solvent, 9.8% by weight of a tackifier and 0.2% by weight of a catalyst, the temperature of the adhesive press-molding is room temperature, and a cold pressing mode is adopted;

2. The manufacturing method of the composite section bar as claimed in claim 1, wherein the prepared non-metal plate material specifically comprises the steps of:

selecting a non-metal raw material plate;

cutting the non-metal raw material plate into a first preset size;

and trimming the nonmetal raw material plate with the first preset thickness to a first preset width to obtain the nonmetal plate.

3. The method of making a composite profile of claim 2, wherein the preparing a metal profile comprises the steps of:

selecting a metal section, and cutting the metal section into a second preset size; wherein the width of the metal profile is equal to the first preset width.

4. A method of making a composite profile according to claim 3, wherein said selecting a metal profile further comprises the steps of:

and carrying out pretreatment on the metal section, wherein the pretreatment comprises derusting treatment and degreasing treatment.

5. The method for manufacturing a composite profile according to claim 4, wherein the step of pretreating the metal profile further comprises the steps of:

and polishing the bonding surface of the metal section with the second preset size to form preset textures so as to increase the adhesive force of the adhesive.

6. The method for manufacturing a composite profile according to claim 5, wherein the grinding to form the predetermined texture specifically comprises:

and polishing the bonding surface of the metal section with the second preset size along the width direction of the metal section to form the preset texture.

7. The method for manufacturing a composite profile according to claim 5, wherein the grinding to form the predetermined texture specifically comprises:

and polishing the bonding surface of the metal section with the second preset size along two orthogonal directions to form the preset texture, wherein the preset texture is a cross concave texture.

8. The method of manufacturing a composite profile according to claim 1, wherein the step of pressing the composite profile slab into a shape further comprises: performing nail gun operation on the composite section bar plate blank from the outer side of the non-metal plate to the direction of the metal section bar so as to reinforce the connection strength of the non-metal plate and the metal section bar;

or the like, or, alternatively,

the method also comprises the following steps after the composite section bar plate blank is pressed and molded: and carrying out nail gun operation on the semi-finished composite section bar from the outer side of the non-metal plate to the direction of the metal section bar so as to reinforce the connection strength of the non-metal plate and the metal section bar.

9. The method for manufacturing a composite profile according to any one of claims 1 to 8, wherein the post-processing of the semi-finished composite profile to obtain a finished composite profile specifically comprises the steps of:

and milling the non-metal plate of the semi-finished composite section bar to obtain a finished composite section bar.

10. A manufacturing method of a composite section for doors and windows is characterized by comprising the following steps:

applying an adhesive on the surface of the non-metal plate or the metal section, and assembling according to a preset assembly structure to obtain a composite section plate blank, wherein the preset assembly structure is that the non-metal plate is arranged on one side, away from the heat insulation piece, of at least one metal section, the adhesive comprises the following components, by weight, 50% of isocyanate, 30% of polyether polyol, 10% of a diluent solvent, 9.8% of a tackifier and 0.2% of a catalyst, the temperature of the adhesive press-molding is room temperature, and a cold pressing mode is adopted;

11. The method for manufacturing the composite section bar as claimed in claim 10, wherein the preparation of the non-metal plate material specifically comprises the steps of:

selecting a non-metal raw material plate;

cutting the non-metal raw material plate into a first preset size;

12. The method of making a composite profile of claim 11, wherein the preparing a metal profile comprises the steps of:

selecting a metal section, and cutting the metal section into a second preset size, wherein the width of the metal section is equal to the first preset width;

carrying out pretreatment on the metal section, wherein the pretreatment comprises derusting treatment and degreasing treatment;

13. The method of making a composite profile of claim 12, further comprising the step of, prior to said press-forming said composite profile slab: performing nail gun operation on the composite section bar plate blank from the outer side of the non-metal plate to the direction of the metal section bar so as to reinforce the connection strength of the non-metal plate and the metal section bar;

or the like, or, alternatively,

14. The method for manufacturing a composite profile according to any one of claims 10 to 13, wherein the post-processing of the semi-finished composite profile to obtain a finished composite profile specifically comprises the steps of:

15. A manufacturing method of a composite section for doors and windows is characterized by comprising the following steps:

16. The method for manufacturing a composite profile according to claim 15, wherein the step of post-processing the semi-finished composite profile to obtain a finished composite profile comprises the steps of:

milling the non-metal plate of the semi-finished composite profile;

and cutting off the temporary connecting bridge in the semi-finished composite section bar pouring groove to disconnect the metal connection, thereby obtaining the finished composite section bar.

17. The method for manufacturing the composite section bar as claimed in claim 15 or 16, wherein the stock preparation non-metal plate specifically comprises the steps of:

selecting a non-metal raw material plate;

cutting the non-metal raw material plate into a first preset size;

18. The method of making a composite profile of claim 17, wherein the preparing a metal profile comprises the steps of:

19. The method of manufacturing a composite profile according to claim 15 or 16, wherein the step of press-forming the composite profile slab further comprises: performing nail gun operation on the composite section bar plate blank from the outer side of the non-metal plate to the direction of the metal section bar so as to reinforce the connection strength of the non-metal plate and the metal section bar;

or the like, or, alternatively,