CN211780146U - A multi-layer cladding profile - Google Patents

Abstract

The utility model provides a multi-layer cladding profile, the profile comprises at least one skin layer and at least one core material, and on the cross section of the profile, the skin layer wraps the core material in a closed-loop or semi-closed-loop type. The profile can include multiple layers of skin layers and core materials, and the multiple layers of skin layers and core materials can be alternately coated, and multiple layers of the core materials can also be provided inside the same skin side. The materials of the skin layer and the core material are diversified. According to the specific requirements of the building profile, a material with a certain bearing capacity or a certain function, or a material with both bearing capacity and functionality is selected as the core material. The surface of the skin layer is smooth and beautiful, with high certain strength, corrosion resistance and thermoplasticity. It can be molded into a skin layer structure at one time, and then filled with the core material; it can also be covered with a targeted outer layer according to the specific shape of the core material, and finally formed Profiles with a certain external shape, and the overall structural performance meets the actual needs.

Description

A multi-layer cladding profile

technical field

The utility model belongs to the technical field of composite building profiles, in particular to a multi-layer cladding profile.

Background technique

Thermoplastic resin has the advantages of corrosion resistance, impact resistance, recyclability, good thermal processing performance, and high degree of design freedom. In structures with high requirements on bearing capacity, thermoplastic resins can be used in combination with high-performance fibers, which can be combined with high-performance fiber reinforcements. The excellent performance in terms of light weight and high strength is more prominent, and the low-cost and rapid preparation of high-performance materials can be realized. And meet the major needs of high-efficiency construction, rapid construction, long-term maintenance-free and other aspects of construction projects. Thermoplastic resins can be used in combination with high-performance fibers in structures that require high load-bearing capacity. At present, the basic form of fiber-reinforced thermoplastic resin matrix composites is usually prepreg, and the application field is mainly aerospace vehicles.

Limited by the single plane structure of prepreg, it cannot meet the demand for profiles with a certain spatial structure and both bearing capacity and functionality in the fields of construction, transportation, and energy.

Patent CN201610764666.3 provides a lightweight and low-cost impact-resistant prepreg composite board. The composite board is a sandwich structure composed of a prepreg upper skin, a functional core material, and a prepreg lower skin. The functional core material It is a superposition of one or more of chopped glass fiber reinforced thermoplastic resin prepreg, unidirectional long fiber prepreg, mesh glass fiber cloth, and woven fiber prepreg. The upper and lower skins of the prepreg are multi-layered. The composite materials of chopped glass fiber reinforced thermoplastic resin are superimposed on each other, and the superposition of each layer is in the same direction or in different directions.

Patent CN201610526251.2 discloses a foamed sandwich material and its manufacturing method and application. The foamed sandwich material is a three-layer sandwich structure composed of a foamed thermoplastic resin core layer and a fiber-reinforced thermoplastic resin composite material skin layer. , wherein the thermoplastic resin of the core layer and the skin layer is the same thermoplastic resin. The manufacturing method of the foamed sandwich material adopts the method of hot compounding and cold pressing to compound the core layer and the skin layer, avoiding the use of adhesive materials, thereby further making the material composition of the foaming core material single, which is convenient and easy to recycle. use.

At present, thermoplastic resins and thermoplastic resin-based composite materials are mainly used in plate-type composite profiles. Among them, the inner core material has few types of materials and a single function. The stress situation mainly considers the force in one direction along the length of the plate, and the overall profile does not Bending resistance, low compressive energy performance, and narrow application range; the use of multi-layer tiling and superposition is relatively complex, and it is easy to delaminate and fall off after long-term use; at present, the main composite profiles cannot meet the requirements of multi-dimensional size, strength, toughness, Requirements for other types of building profiles with better coupling effects such as stress functionality.

Utility model content

In order to solve the above problems, the utility model provides a multi-layer cladding profile, the profile comprises at least one layer of thermoplastic resin or thermoplastic resin-based composite material skin and at least one layer of core material, on the cross section of the profile, The skin layer covers the core material in a closed or semi-closed loop, the cross section of the profile is selected from circle, rectangle, ellipse, triangle or trapezoid, and the surface of the profile along the length direction is a plane or a curved surface. Preferably, the core material is a functional core material.

On the cross section of the profile, the skin layer covers the core material 360 degrees, that is, the skin layer covers the inner core material in a closed-loop type, or the skin layer covers the core material in a semi-closed-loop type, that is, it has an opening and covers the core material. three sides or two adjacent sides. The traditional multi-layer composite building profiles mostly use a sandwich-like structure, only covering the upper and lower sides of the inner core material, the left and right sides of the core material are exposed, and most of them are plate-shaped profiles, so this most common structure has layers between the layers. The combination is not strong, and it is easy to delaminate and fall off after long-term use. The skin layer of the profile of the utility model will uniformly coat the surrounding sides of the inner core material in the circumferential direction. Viewed from the cross section, the skin layer forms a closed-loop 360-degree coating on the core material, or covers three Side or two adjacent sides, such a structure makes the combination of the skin layer and the core material more closely, and it is not easy to cause the structure to fail and fall off during the actual long-term use and stress process.

Preferably, the skin layer wraps the core material in a closed-loop manner, which can greatly improve the overall bearing capacity of the profile under the action of multi-directional forces. For example: when the profile bears a positive pressure, the force transmitted by the overall structure to the cladding layer is transformed into a large hoop internal stress, which strongly constrains the core pressure-bearing structure, thereby greatly improving the compressive strength of the overall profile. Therefore, Compared with other non-circumferential cladding materials, it exhibits better compressive performance. In addition, since the cladding layer of the profile has strong tensile strength along the direction of the reinforcing fibers, and the surface material is uniform, when designing the bearing capacity, the overall stress characteristics of the profile are considered, and the cladding is reinforced at the weak part of the core structure. The covering surface of the skin layer will greatly improve the mechanical performance of the overall structure, and the design and preparation methods are simple.

Preferably, the profile material includes at least two layers of skin layers and at least two layers of core materials, and multiple layers of the core materials may be provided inside the same outer skin side, or the skin layers and the core materials may be alternately wrapped. For example, the profile includes 3 layers of skin layers and 3 layers of core material, and the coating sequence from outside to inside is the first skin layer, the first core material, the second skin layer, the second core material, the third skin layer and the third core material , the coating sequence from outside to inside can also be the first skin layer, the first core material, the second core material, the second skin layer, the third skin layer and the third core material.

The material of the skin layer is selected from one or a combination of two or more of thermoplastic resin, thermoplastic resin-based fiber composite material prepreg, thermoplastic resin-based chopped fiber composite material, or thermoplastic resin-based composite material. The surface of the skin layer is smooth and beautiful, has a certain strength, is thermoplastic, has strong designability, and has various and convenient processing techniques. The skin layer material is suitable for combining with the core material, can be granulated and recycled after being crushed, and is environmentally friendly and pollution-free.

The thermoplastic resin is selected from polyether ether ketone, polyethylene, polypropylene, polyvinyl chloride, polystyrene, polyamide, polycarbonate, polyphenylene ether, polysulfone, polyethylene terephthalate, rubber one or a combination of two or more. The thermoplastic resin in the thermoplastic resin-based composite material is selected from the above-mentioned types of thermoplastic resins.

The core material is selected from one or a combination of two or more selected from cement, metal, concrete, foamed plastic, foam, sponge or honeycomb material. The core material is a functional core material with various materials. According to the specific requirements of the building profile, a material with a certain bearing capacity or a certain function, or a material with both bearing capacity and functionality is selected as the core material.

Due to the strong plasticity of the skin layer, on the one hand, targeted outer coating can be carried out according to the specific shape of the core material for building profiles, so that the profile has a certain external shape, and the overall structural performance meets the actual needs; on the other hand On the one hand, according to the macro-structure requirements of building profiles, a multi-layer skin structure including skin layers can be prepared by lamination, and then a core material with a fixed external shape and actual performance requirements can be obtained by core injection to form the final profile.

The cross section of the profile is selected from circular, rectangular, elliptical, triangular, trapezoidal and other irregular shapes, and the surface of the profile is plane or curved along the length direction. The profiles have various shapes and are suitable for the needs of different building structures or shapes. For example, the profile is a rectangular parallelepiped, and the skin and core materials are covered with a rectangle, which can be used as brick profiles; the profile is a cylinder. The skin layer and the core material are both round-clad and can be used as column profiles; the outer surface of the profile is a curved surface, and the overall shape is wavy.

Preferably, the interior of the profile is provided with a partition, and the partition is perpendicular to the inner surface of the skin of the profile.

Preferably, the separator is supported between the inner surface of the skin layer and the adjacent core material.

The baffles may be short point support plates. The main function of the separator is to strengthen the internal structure of the profile, and the internal structure of the support is not suitable for deformation; to promote the mutual conduction of stress in the multi-layered stress structure formed in the profile to coordinate and enhance the overall stress performance, while strengthening the external support.

Preferably, a connecting rod is provided inside the profile, and the connecting rod is parallel to the cross section of the profile.

Preferably, one end of the connecting rod is set in the innermost core material, and the other end is set on the inner surface of the outermost skin layer of the profile. More preferably, one end of the connecting rod is set in the innermost core the center of the material. The connecting rod acts as an effective and reliable connection between the skin layer and the core material, between the skin layer and the skin layer, and between the core material and the core material, and ensures the overall structural stability of the multi-layer skin layer and the core material, as well as the multi-layer structure. reliable connection between.

The profile of the utility model is provided with partitions or connecting rods, the structure is simple, the use is convenient, the stress environment inside the profile can be improved by a simple method, and the internal stress of the system is promoted to be uniform; at the same time, the connection between the layers is strengthened. , the structure is stable, and the effective coordination of all layers is promoted, thereby greatly improving the overall bearing capacity of multi-directional force.

The utility model also provides a method for making the profile, the method comprising the following steps:

(1) forming the innermost layer of the core material on a prefabricated device with connecting rods and separators;

(2) Hot pressing and wrapping the innermost skin layer on the outside of the innermost core material;

(3) Repeat steps (1)-(2) to obtain the profile with multiple skin layers and core material.

The utility model also provides another method for making the profile, the method comprising the following steps:

(1) molding to form the outermost skin layer;

(2) molding to form the sub-outer skin layer;

(3) placing the secondary outer cortex on the inner side of the outermost cortex, and positioning the two layers with a connecting rod;

(4) A partition is added between the secondary outer skin layer and the outermost skin layer;

(5) filling or pouring the outermost core material between the two skin layers obtained in steps (1) and (2);

(6) Repeat steps (3)-(5) to obtain the profile with multiple skin layers and core material.

The advantages of the profile of the utility model: (1) the skin layer has high strength, light weight, durability, environmental protection and recyclability; (2) the core material can not only bear certain mechanical performance requirements, but also meet the functional requirements (3) Strong designability, flexible multi-layer structure, and satisfying functional design and structural modeling design at the same time; (4) High structural stability, fast and efficient processing.

Description of drawings

Figure 1 is a structural diagram of a multi-layer clad profile.

FIG. 2 is a structural diagram of another optional multilayer cladding profile.

FIG. 3 is a structural diagram of another optional multilayer cladding profile.

FIG. 4 is a structural diagram of another optional multilayer cladding profile.

FIG. 5 is a structural diagram of another alternative multilayer cladding profile.

In the drawings, 1-skin, 101-first skin, 102-second skin, 103-third skin, 2-core, 201-first core, 202-second core, 203-third core material, 3 - the first connecting rod, 301 - the second connecting rod, 4 - the first separator, 401 - the second separator.

Detailed ways

Example 1

The structure of the multi-layer cladding profile in this embodiment is shown in Figure 1, including a layer of skin 1 and a layer of core material 2. On the cross section of the profile, the skin layer 1 is closed-loop wrapped to the core material 2. The material is polypropylene resin, the material of the core material 2 is polyethylene foam plastic, the cross section of the multi-layer cladding profile is circular, and the whole is cylindrical.

The preparation method of the multi-layer cladding profile in this embodiment is as follows: (1) the skin layer 1 is molded at one time; (2) the inside of the formed skin layer 1 is filled with a core material 2 .

Table 1 Mechanical properties of Example 1

Example 2

The structure of the multi-layer cladding profile in this embodiment is shown in FIG. 2 , including two layers of skin layers and two layers of core materials. The second core material 202, on the cross section of the profile, the second skin layer 102 wraps the second core material 202 in a closed loop, the first skin layer 101 wraps the first core material 201 in a closed loop, and both skin layers are made of polypropylene Based on chopped glass fiber composite material, the first core material 201 is sponge, the second core material 202 is polypropylene plastic honeycomb material, the cross section of the second core material 202 is oval, and the cross section of the first core material 201 is rectangular , the overall profile is a cuboid.

There are partitions and connecting rods inside the profiles. The two separators are perpendicular to the outer surface of the profile, the first separator 4 is provided inside the first skin layer 101 and extends to the inside of the first core material 201, and the second separator 401 is provided on the outside of the second skin layer 102 and extends to the first core material 201 inside. The baffle plate makes the mutual transmission of stress in the multi-layer force-bearing structure formed in the profile, so as to coordinate and enhance the overall force-bearing performance, and at the same time strengthen the external support. Both the first connecting rod 3 and the second connecting rod 301 are parallel to the cross-section of the profile, and both penetrate the cross-section of the profile, but do not penetrate the outer surface of the profile. The first connecting rod 3 and the second connecting rod 301 cross each other with an included angle of 120 degrees. The two connecting rods are the effective connection between the two skin layers and the two core materials, ensuring the structural stability and reliable connection of the skin layers and the core materials, and at the same time enhancing the strength of the profiles.

The preparation method of the profile of this embodiment is as follows: (1) molding to form a first skin layer; (2) molding to form a second skin layer; (3) placing the second skin layer inside the first skin layer, and two layers are used between the two layers. The connecting rod is positioned; (4) two partitions are added between the second skin layer and the first skin layer; (5) the first core material is filled between the first skin layer and the second skin layer, and the second core material is filled inside the second skin layer material.

Table 2 Mechanical properties of Example 2

Example 3

The structure of the multi-layer cladding profile in this embodiment is shown in FIG. 3 , including three layers of skin layers and three layers of core materials. From outside to inside, there are a first skin layer 101 , a first core Two core materials 202, a third skin layer 103 and a third skin layer 203, on the cross section of the profile, the first skin layer 101 is closed-loop wrapped to the first core material 201, and the second skin layer 102 is closed-loop wrapped to the second core material 202 The third skin layer 103 covers the third core material 203 in a closed-loop manner. The materials of the three skin layers are all polyphenylene sulfide resin prepreg tapes, the material of the first core material 201 is copper metal, the material of the second core material 202 is polyethylene foamed plastic, and the material of the third core material 203 For concrete, the cross section of the profile is a rectangle, and the whole is a cuboid.

The preparation method of the profile of this embodiment is: (1) molding to form a first skin layer; (2) molding to form a second skin layer; (3) molding to form a third skin layer; (4) between the first skin layer and the second skin layer Filling the first core material; (5) filling the second core material between the second skin layer and the third skin layer; (6) pouring the third core material inside the third skin layer.

Table 3 Mechanical properties of Example 3

Example 4

The structure of the multi-layer cladding profile in this embodiment is shown in Figure 4, including a layer of skin 1 and a layer of core material 2. On the cross section of the profile, the skin layer 1 wraps the core material 2 in a closed-loop manner. The material is polyphenylene sulfide resin, the material of the core material 2 is glass fiber reinforced honeycomb material, the cross section of the profile is circular arch, and the whole is circular arch.

The preparation method of the profile in this embodiment is as follows: (1) the polyurethane honeycomb material is made into the shape of a core material; (2) the outer side of the core material is hot-pressed and covered with a skin layer.

Table 4 Mechanical properties of Example 4

Example 5

The structure of the multi-layer cladding profile in this embodiment is shown in Figure 5, including a layer of skin 1 and a layer of core material 2. On the cross section of the profile, the skin layer 1 coats the core material 2 in a semi-closed loop, that is, the skin layer 1. Coating the upper surface and two sides of the core material 2, the material of the skin layer 1 is a glass fiber cloth polycarbonate composite tape, the material of the core material 2 is a polyurethane foam material, the cross section of the profile is a rectangle, and the whole is a cuboid.

The preparation method of the profile in this embodiment is as follows: (1) making the polyurethane foam material into the shape of a core material; (2) hot-pressing a skin layer on the outside of the core material.

Table 5 Mechanical properties of Example 5

Claims (9)

1. The multi-layer cladding profile is characterized by comprising at least one layer of thermoplastic resin or thermoplastic resin-based composite material skin layer and at least one layer of core material, wherein the skin layer wraps the core material in a closed loop mode or a semi-closed loop mode on the cross section of the profile, the cross section of the profile is selected from a circle, a rectangle, an oval, a triangle or a trapezoid, and the surface of the profile is a plane or a curved surface along the length direction.

2. Profile according to claim 1, characterized in that the profile comprises at least two skin layers and at least two core materials.

3. Profile according to claim 2, wherein a plurality of said skins and a plurality of said core are alternately wrapped.

4. The profile according to claim 2, wherein the profile comprises 3 skin layers and 3 core materials, and the coating sequence from outside to inside is a first skin layer, a first core material, a second skin layer, a second core material, a third skin layer and a third core material, or the coating sequence from outside to inside is a first skin layer, a first core material, a second skin layer, a third skin layer and a third core material.

5. The profile according to any one of claims 1 to 4, wherein a partition is arranged inside the profile, and the partition is perpendicular to the inner surface of the skin of the profile.

6. A profile according to claim 5, characterised in that the profile comprises at least 2 partitions inside the profile, said partitions being arranged inside the first skin and extending inside the first core, or said partitions being arranged outside the second skin and extending inside the first core.

7. Profile according to claim 5, characterized in that the interior of the profile is provided with connecting rods, which are parallel to the cross section of the profile.

8. Profile according to claim 7, wherein the first connecting rods and the second connecting rods cross each other.

9. The profile according to claim 8, wherein the first connecting rod and the second connecting rod are angled at 120 degrees.

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