Compression molding composite material

Abstract

The utility model provides a compression molding composite material, and relates to the field of compression molding. The compression molding composite material comprises a composite material main body, an insert column and an embedded insert, wherein the insert column and the composite material main body are integrally formed; the diameter D2 of the end, close to the composite material body, of the insert column is larger than the diameter D1 of the end, away from the composite material body, of the insert column. The embedded insert is wrapped in the insert column, a boss is arranged on the side, close to the composite material body, of the embedded insert, and the boss is inserted into the wall body of the insert column. The end, close to the composite material body, of the insert column is large in size, large in space and gentle in shape, the possibility of fiber orientation is reduced, the strength of the insert column is enhanced, the boss can increase the rotating resistance and the pulling-out resistance of the embedded insert and can transfer the rotating resistance and the pulling-out resistance to the end, with the higher strength, of the insert column, and therefore the embedded insert is more stable. And the cracking risk of the insert column is reduced.

Description

Technical Field

[0001] The utility model relates to the field of compression molding, in particular to a compression molding composite material. Background Art

[0002] Compression molding is a manufacturing technique that processes materials (typically plastic, rubber, or composite materials) into specific shapes under high temperature and pressure. Sheet Molding Compounds (SMC), a specialized material used in compression molding, offer excellent properties such as high strength, lightweight, corrosion resistance, high-temperature resistance, and insulation. SMC is a resin paste made from unsaturated polyester resin with thickeners, inorganic fillers, initiators, release agents, and pigments, impregnated with chopped glass fiber or mat, and coated on both sides with polyethylene film. Currently, composite molded products with embedded inserts are widely used in automotive exteriors and other industries. Due to assembly requirements, composite products often incorporate embedded fasteners (such as nuts) to securely connect to other components. These fasteners are required to meet standard torque and pullout force requirements. However, during the actual compression molding process, due to the complex structural design of the product, the top of the insert column, which covers the exterior of the embedded insert, is relatively weak. This poses a risk of cracking during torque tightening during assembly, making repair difficult. Utility Model Content

[0003] In view of the above problems existing in the prior art, the utility model provides a compression-molded composite material to improve the problem of failure of pre-embedded inserts during fastening.

[0004] In order to achieve the above-mentioned purpose and other related purposes, the present invention provides a molded composite material, characterized in that it includes a composite material body, an insert column and an embedded insert, and the insert column and the composite material body are integrally formed; the insert column is a conical structure, and the diameter D2 of the insert column close to the composite material body is larger than the diameter D1 of the insert column away from the composite material body; the embedded insert is covered in the insert column, and a boss is provided on the side of the embedded insert close to the composite material body, and the boss is inserted into the wall of the insert column.

[0005] In one embodiment of the present invention, the outer edge of the embedded insert is hexagonal.

[0006] In an embodiment of the present invention, a slot is provided on the embedded component, and the slot surrounds the embedded component.

[0007] In one embodiment of the present invention, the flatness of the insert column and the embedded insert is ±0.5 mm.

[0008] In one embodiment of the present invention, a blind hole for accommodating the boss is provided on the embedded insert, one end of the boss is inserted into the blind hole, and the other end extends in a direction perpendicular to the embedded insert toward a direction away from the embedded insert.

[0009] In one embodiment of the present invention, the boss and the blind hole are cylindrical.

[0010] In one embodiment of the present invention, a first reinforcing rib is provided between the composite material body and the insert column.

[0011] In one embodiment of the present invention, a second reinforcing rib is provided between the side wall of the composite material body and the first reinforcing rib.

[0012] In one embodiment of the present invention, the first reinforcing rib is a structure similar to a right triangle, one right-angled side of the first reinforcing rib is connected to the side wall of the insert column, and the other side of the first reinforcing rib is connected to the composite material body.

[0013] In the molded composite material of the present invention, the insert column is integrally formed with the composite body, and a pre-embedded insert is wrapped inside the insert column. The insert column has a conical structure, and the diameter of the insert column near the composite body is larger than the diameter of the insert column away from the composite body. During the thermal processing of the product, the area of ​​the insert column near the composite body is larger in size and space than the area away from the composite body, and the shape is relatively smooth, so that the resin flows more smoothly. This makes the fiber distribution near the end of the insert column near the composite body sufficient, reduces the possibility of fiber orientation, and enhances the strength of the insert column near the composite body. The boss on the pre-embedded insert can not only increase the rotational resistance and pull-out resistance of the pre-embedded insert, but also transfer the rotational resistance and pull-out resistance to the end of the insert column with greater strength, reducing the risk of cracking of the insert column or the situation where the pre-embedded insert bites off and rotates, and improving the problem of failure of the pre-embedded insert when tightened. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other embodiments can be obtained based on these drawings without paying any creative work.

[0015] Figure 1 A schematic diagram of a compression-molded composite material according to an embodiment of the present invention;

[0016] Figure 2A top view of a molded composite material according to an embodiment of the present invention;

[0017] Figure 3 for Figure 2 Cross-sectional view along AA direction;

[0018] Figure 4 This is a schematic structural diagram of a pre-embedded insert in an embodiment of the molded composite material of the present invention;

[0019] Figure 5 A top view of a pre-embedded insert in an embodiment of the molded composite material of the present invention;

[0020] Figure 6 for Figure 5 Cross-sectional view along BB direction.

[0021] Component number description:

[0022] 100 , composite material body; 200 , insert column; 300 , embedded insert; 310 , boss; 320 , slot; 400 , first reinforcing rib; 500 , second reinforcing rib. DETAILED DESCRIPTION

[0023] The following describes the implementation of the present invention through specific examples. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation methods. The details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the following examples and the features in the examples can be combined with each other unless there is a conflict. It should also be understood that the terms used in the examples of the present invention are for the purpose of describing specific implementation methods, not for the purpose of limiting the scope of protection of the present invention. The test methods for which specific conditions are not specified in the following examples are generally carried out under conventional conditions or under the conditions recommended by the manufacturers.

[0024] When numerical ranges are given in the examples, it should be understood that unless otherwise specified herein, both endpoints of each numerical range and any value between the endpoints may be used. Unless otherwise defined, all technical and scientific terms used in this utility model are consistent with the prior art as understood by those skilled in the art and the description of this utility model. Any prior art methods, equipment, and materials similar or equivalent to those in the examples of this utility model may also be used to implement this utility model.

[0025] It should be noted that the terms such as "upper", "lower", "left", "right", "middle" and "one" cited in this specification are only for the convenience of description and are not used to limit the scope of implementation of the present invention. Changes or adjustments to their relative relationships should be regarded as the scope of implementation of the present invention without substantially changing the technical content.

[0026] See also Figures 1 to 6 The present invention provides a compression-molded composite material comprising a composite material body 100, an insert column 200, and an embedded insert 300. The insert column 200 is integrally formed with the composite material body 100 and has a tapered structure. The diameter D2 of the insert column 200 near the composite material body 100 is greater than the diameter D1 of the insert column 200 away from the composite material body 100. The embedded insert 300 is encased within the insert column 200. A boss 310 is provided on the side of the embedded insert 300 near the composite material body 100. The boss 310 is inserted into the wall of the insert column 200. The tapered structure of the insert column 200 not only facilitates demolding of the composite material, but also, because the end of the insert column 200 near the composite body 100 is larger, offers ample space, and has a flatter shape, it facilitates smoother resin flow during thermal processing. This ensures adequate fiber distribution near the end of the insert column 200 near the composite body 100, reduces the likelihood of fiber orientation, and enhances the strength of the insert column 200 near the composite body 100. Accordingly, the wall thickness L2 of the insert column 200 near the composite body 100, which is wrapped around the exterior of the pre-embedded insert 300, is greater than the wall thickness L1 of the insert column 200 near the end of the composite body 100, which is wrapped around the exterior of the pre-embedded insert 300. The boss 310 can not only increase the rotational resistance and pull-out resistance of the embedded insert 300, but also transfer the rotational resistance and pull-out resistance to the end of the insert column 200 with greater strength, thereby reducing the risk of cracking of the insert column 200 or the embedded insert 300 biting off the axis and improving the problem of failure of the embedded insert 300 when tightened.

[0027] See also Figure 4 and Figure 6In one embodiment, in order to increase the rotational resistance between the embedded insert 300 and the insert column 200, prevent the embedded insert 300 from loosening, realize the self-locking function, and enhance the stability of the composite material, the outer edge of the embedded insert 300 is hexagonal. The hexagonal structure can not only increase the rotational resistance by increasing the friction coefficient between the embedded insert 300 and the insert column 200, but also provide greater resistance when subjected to rotational force, thereby increasing the rotational resistance. In order to enhance the pull-out resistance of the embedded insert 300 in the insert column 200 and prevent the embedded insert 300 from falling out of the insert column 200 during use, a card slot 320 is provided on the embedded insert 300, and the card slot 320 surrounds the embedded insert 300. There is no restriction on the number and size of the card slots 320 here, and they can be adjusted according to actual needs. Excessive flatness between the insert post 200 and the embedded insert 300 can easily lead to uneven stress distribution, affecting the stability and durability of the composite material. This can easily lead to fatigue or damage during long-term operation, and may also cause vibration or noise, impacting the user experience. Therefore, the flatness between the insert post 200 and the embedded insert 300 should be minimized. In this embodiment, the flatness between the insert post 200 and the embedded insert 300 is ±0.5 mm. In this application, the dimensions of the insert post 200 and the embedded insert 300 are not limited and can be adjusted according to actual needs.

[0028] See also Figures 4 to 6 In one embodiment, the boss 310 and the embedded insert 300 can be an integral structure or a split structure. In this embodiment, in order to reduce the difficulty of processing and save materials, the boss 310 and the embedded insert 300 are split structures. Specifically, a blind hole for placing the boss 310 is provided on the embedded insert 300, one end of the boss 310 is inserted into the blind hole, and the other end of the boss 310 extends in a direction perpendicular to the embedded insert 300 in a direction away from the embedded insert 300. There is no restriction on the shape of the boss 310 and the blind hole here, as long as the shape of the blind hole is consistent with that of the boss 310. In this embodiment, in order to facilitate processing, the shape of the boss 310 and the blind hole is cylindrical.

[0029] See also Figure 1 and Figure 3In one embodiment, a first reinforcing rib 400 is provided between the composite material body 100 and the insert column 200 to support the insert column 200 and enhance the structural strength of the insert column 200. In this embodiment, the first reinforcing rib 400 is shaped like a right triangle, with one right-angled side of the first reinforcing rib 400 connected to the side wall of the insert column 200, and the other side of the first reinforcing rib 400 connected to the composite material body 100. In this embodiment, the first reinforcing rib 400 is integrally formed with the composite material body 100 and the insert column 200. In order to enhance the strength of the composite material body 100, a second reinforcing rib 500 is provided between the side wall of the composite material body 100 and the first reinforcing rib 400. The dimensions of the first reinforcing rib 400 and the second reinforcing rib 500 are not limited here and can be adjusted according to actual needs.

[0030] In the molded composite material of the present invention, the insert column is integrally formed with the composite body, and a pre-embedded insert is wrapped inside the insert column. The insert column has a conical structure, and the diameter of the insert column near the composite body is larger than the diameter of the insert column away from the composite body. During the thermal processing of the product, the area of ​​the insert column near the composite body is larger in size and space than the area away from the composite body, and the shape is relatively smooth, so that the resin flows more smoothly. This makes the fiber distribution near the end of the insert column near the composite body sufficient, reduces the possibility of fiber orientation, and enhances the strength of the insert column near the composite body. The boss on the pre-embedded insert can not only increase the rotational resistance and pull-out resistance of the pre-embedded insert, but also transfer the rotational resistance and pull-out resistance to the end of the insert column with greater strength, reducing the risk of cracking of the insert column or the situation where the pre-embedded insert bites off and rotates, and improving the problem of failure of the pre-embedded insert when tightened. This method can also be used to improve the compression molding process of the same structure, such as the DCPD (dicyclopentadiene reaction injection molding) process, to solve the problem of pre-embedded inserts not meeting the torque standard. Therefore, the utility model effectively overcomes some practical problems in the prior art and has high utilization value and practical significance.

[0031] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the present invention. Anyone skilled in the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by one of ordinary skill in the art without departing from the spirit and technical principles disclosed in the present invention are intended to be covered by the claims of the present invention.

Claims

1. A compression molded composite material, characterized in that: include: a composite body (100); An insert column (200) is integrally formed with the composite material body (100); the insert column (200) is a tapered structure, and a diameter D2 of an end of the insert column (200) close to the composite material body (100) is larger than a diameter D1 of an end of the insert column (200) away from the composite material body (100); The embedded insert (300) is wrapped in the insert column (200), and a boss (310) is provided on a side of the embedded insert (300) close to the composite material body (100), and the boss (310) is inserted into the wall of the insert column (200).

2. The compression molded composite material according to claim 1, characterized in that: The outer edge of the embedded insert (300) is hexagonal.

3. The compression molded composite material according to claim 1, characterized in that: The embedded insert (300) is provided with a card slot (320), and the card slot (320) surrounds the embedded insert (300).

4. The compression molded composite material according to claim 1, characterized in that: The flatness of the insert column (200) and the embedded insert (300) is ±0.5 mm.

5. The compression molded composite material according to claim 1, characterized in that: The embedded insert (300) is provided with a blind hole for accommodating the boss (310), one end of the boss (310) is inserted into the blind hole, and the other end extends in a direction perpendicular to the embedded insert (300) and away from the embedded insert (300).

6. The compression molded composite material according to claim 5, characterized in that: The boss (310) and the blind hole are cylindrical.

7. The compression molded composite material according to claim 1, characterized in that: A first reinforcing rib (400) is provided between the composite material body (100) and the insert column (200).

8. The compression molded composite material according to claim 7, characterized in that: The first reinforcing rib (400) is a structure similar to a right triangle, one right-angled side of the first reinforcing rib (400) is connected to the side wall of the insert column (200), and the other side of the first reinforcing rib (400) is connected to the composite material body (100).

9. The compression molded composite material according to claim 1, characterized in that: A second reinforcing rib (500) is provided between the side wall of the composite material body (100) and the first reinforcing rib (400).

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