Method for preventing delamination of metal inserts in composite packaging boxes

Abstract

The application discloses a method for preventing delamination of a metal embedded part structure in a composite packaging box, and relates to the technical field of large composite packaging boxes. The metal embedded part structure is redesigned, and comprises a bearing area and a non-bearing main body. The bearing area is provided with a filling hole, four T-shaped metal plates are welded around the bearing area, and a conical head is arranged on the T-shaped metal plate. The coating process of the metal embedded plate is redesigned. Fiber yarn is used to weave the fiber cloth on the upper and lower surfaces through the filling hole, the fiber cloth is coated and adhered to the inner and outer skins, and the conical head is inserted into the outer skin to be fixed. The delamination phenomenon between the metal embedded part and the inner and outer skins is effectively prevented, and the structural stability and mechanical properties of the composite packaging box are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of large composite packaging boxes, and particularly relates to a method for preventing delamination of a metal embedded structure in a composite packaging box. BACKGROUND

[0002] The box size of a large composite packaging box is greater than or equal to 5000mm*1000mm*1000mm, and the packaging box is usually used under multiple working conditions such as transportation, hoisting and lifting, and the working conditions are relatively complex. In order to reduce the cost, the current packaging box is usually a glass fiber reinforced plastic structure. In order to meet the working conditions, a metal embedded part in the glass fiber reinforced plastic structure is needed to connect with external parts at a stress part. The main function of the metal embedded part is to provide a stable connection for the installation of external parts, and the metal embedded part plays a role of bearing to enhance the bearing capacity of the packaging box. Since the packaging box is usually formed by a VARI process, the fiber is laid after the glue is injected to form, which may cause the metal embedded part to be misaligned. In addition, the use environment of the packaging box is relatively harsh, and the packaging box is often used in places with large temperature differences. Since the thermal expansion coefficient of the metal is quite different from the thermal expansion coefficient of the glass fiber reinforced plastic, the metal embedded part and the glass fiber reinforced plastic are delaminated during repeated use, which causes the air tightness of the packaging box to be poor and unable to meet the use requirements. SUMMARY

[0003] The purpose of the present application is to process the metal embedded part in the composite packaging box to prevent delamination of the metal embedded part and the composite material.

[0004] To achieve the above purpose, the technical scheme adopted by the present application is as follows:

[0005] A method for preventing delamination of a metal embedded structure in a composite packaging box, comprising the following steps:

[0006] 1) designing and manufacturing a structure of a metal embedded part, the main body of the metal embedded part comprising a bearing area and a non-bearing area, the non-bearing area being linearly arrayed or circularly arrayed around the four sides of the bearing area to form filling holes; four T-shaped metal plates are welded around the main body, and each T-shaped metal plate is provided with a conical head on one side;

[0007] 2) laying a composite packaging box skin;

[0008] 3) cutting a fiber cloth according to the size and hole position of the metal embedded part, and fixing the cut fiber cloth on the upper and lower surfaces of the main body of the metal embedded part by using a predetermined shaping agent;

[0009] 4) using fiber yarn to pass through the filling holes of the non-bearing area of the metal embedded part in an up-down interlacing manner to weave the fiber cloth fixed on the upper and lower surfaces;

[0010] 5) using fiber cloth to wrap the main body of the metal embedded part;

[0011] 6) using fiber yarn to wrap the four T-shaped metal plates, and using a predetermined agent to fix;

[0012] 7) placing the metal embedded part treated in step 6) in a designated position, with the metal embedded part having a tapered head facing the outer skin, and embedding the tapered head into the outer skin by knocking;

[0013] 8) cutting the fiber cloth into small pieces, filling the filling holes in the non-load-bearing area of the metal embedded part and compacting;

[0014] 9) laying the inner skin of the composite packaging box on the metal embedded part treated in step 8), and manufacturing the composite packaging box according to the predetermined forming process of the packaging box.

[0015] Further, the load-bearing area of the metal embedded part is a solid structure or a hollow structure.

[0016] Further, the height of the tapered head is less than the thickness of the outer skin.

[0017] Further, the metal embedded part is polished and wiped after being manufactured to keep the surface clean and free of stains.

[0018] Further, the fiber cloth is selected from glass fiber square cloth.

[0019] Further, the fiber yarn is selected from glass fiber yarn.

[0020] Further, the joints of the fiber cloth are fixed with a predetermined agent.

[0021] Further, the predetermined agent is selected from tack328.

[0022] Further, the tapered head is embedded into the outer skin by using a leather hammer to knock.

[0023] The technical effects achieved by the present application are:

[0024] The present application effectively prevents the delamination between the metal embedded part and the inner and outer skins by redesigning the structure of the metal embedded part and using a specific wrapping process. First, the present application designs a unique structure of the metal embedded part, which is designed to have a load-bearing area for connecting external parts and a non-load-bearing area with holes or linear array holes around it, and a T-shaped metal plate and a conical head on the plate. Second, the present application designs a unique wrapping process for the metal embedded part, which uses fiber cloth to fix on the upper and lower surfaces of the metal embedded part, and wraps the metal embedded part by weaving fiber yarn through the filling holes of the non-load-bearing area, so that the metal embedded part and the fiber cloth become an inseparable whole; and then the wrapped fiber cloth is bonded and fixed with the inner and outer skins, greatly increasing the bonding strength of the metal embedded part and the composite material. Third, the conical head on the T-shaped metal plate is inserted into the outer skin, which can fix the metal embedded part with fiber and prevent the metal embedded part from moving horizontally relative to the skin, significantly improving the firmness between the metal embedded part and the skin. The present application can effectively prevent the delamination of the metal embedded part, help to ensure the structural stability and mechanical properties of the packaging box, including impact resistance, vibration resistance and air tightness; and the implementation of the method does not require expensive materials and equipment, has low manufacturing cost, is easy to implement, and is suitable for the manufacturing process of various composite packaging boxes. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 Figure 1 is a position relationship diagram of the inner and outer skins of the packaging box.

[0026] Figure 2 Figure 2 is a position relationship diagram of the inner skin, metal embedded part and outer skin of the packaging box.

[0027] Figure 3 Figure 3 is a structural schematic diagram of the metal embedded part.

[0028] BRIEF DESCRIPTION OF DRAWINGS:

[0029] 10: outer skin;

[0030] 20: metal embedded part;

[0031] 21: load-bearing area;

[0032] 22: non-load-bearing area;

[0033] 23: filling hole;

[0034] 24: T-shaped metal plate;

[0035] 25: conical head;

[0036] 30: inner skin. DETAILED DESCRIPTION

[0037] In order to make the above technical solutions of the present application more obvious and easy to understand, the following will be described in detail with reference to the drawings.

[0038] The composite packaging box is mainly composed of an outer skin 10 and an inner skin 30, as shown in the figure. Figure 1 In order to improve the structural strength of the packaging box, a layer of metal embedded part 20 is added between the outer skin 10 and the inner skin 30 to form a sandwich structure. Due to the defects in the structural design of the metal embedded part 20 and the defects in the cladding design of the metal embedded part 20, the metal embedded part 20 and the inner and outer skins 10 are prone to delamination during use, which reduces the strength and service life of the composite packaging box. In order to overcome this problem, the structure of the metal embedded part 20 is redesigned, and the cladding process of the metal embedded part 20 is designed, so as to overcome the delamination problem between the metal embedded part 20 and the inner and outer skins 10 during use of the packaging box, and improve the strength and service life of the composite packaging box.

[0039] The embodiment of the present application specifically discloses a method for preventing delamination of a metal embedded part structure in a composite packaging box, and the three-layer structure of the packaging box is shown in the figure. Figure 2 The method specifically comprises the following steps:

[0040] 1) Design the structure of the metal embedded part 20, as shown in the figure. Figure 3 The main body of the metal embedded part 20 includes a bearing area 21 and a non-bearing area 22, and the material of the metal embedded part 20 is selected from Q345. The bearing area 21 refers to the area connected with the external connecting part (such as a screw), and the bearing area 21 can be a solid structure or a hollow structure. The size of the bearing area 21 can be determined according to the size of the external connecting part, as long as it can meet the requirement of external punching connection. The non-bearing area 22 refers to the remaining main body area, and linear array punching or circular array punching is performed around the bearing area 21 on the non-bearing area 22 according to a certain rule to form filling holes 2323. In this embodiment, the size of the main body of the metal embedded part 20 (bearing area 21 + non-bearing area 22) is 110mm×70mm×6mm, and eight rectangular filling holes 2323 with a size of 20mm×5mm are formed on the non-bearing area 22. Four T-shaped metal plates 24 with a size of 40mm×30mm×3mm are welded around the main body of the metal embedded part 20. A conical head 25 with a height of 3mm is arranged on one side of the T-shaped metal plate 24, and the height of the conical head 25 is less than the thickness of the outer skin 10 to avoid penetrating the outer skin 10 when inserted into the outer skin 10. After the metal embedded part 20 is completed, it is polished, then wiped with acetone and cotton, and dried to keep the surface clean and free of stains.

[0041] 2) According to the requirement, the outer skin 10 of the composite packaging box is laid, and the thickness of the outer skin 10 is 5 mm.

[0042] 3) The fiberglass cloth is cut according to the size and the hole position of the metal embedded part 20, and the fiberglass cloth is fixed on the upper and lower surfaces of the main body of the metal embedded part 20 by using a tack agent 328.

[0043] 4) The fiberglass yarn is used to pass through the filling hole 2323 of the non-load-bearing area 22 from one side of the metal embedded part 20 to the other side, and the fiberglass cloth fixed on the upper and lower surfaces is woven.

[0044] 5) The main body of the metal embedded part 20 is tightly wrapped with the fiberglass cloth, and the joint of the cloth is fixed by using the tack agent 328.

[0045] 6) The T-shaped metal plate 24 is wrapped with the fiberglass yarn, and the tack agent 328 is also used for fixing.

[0046] 7) The processed metal embedded part 20 is placed at the specified position according to the size and position of the metal embedded part 20, and the one side of the metal embedded part 20 provided with the tapered head 25 faces the outer skin 10, and the skin hammer is used for knocking, so that the tapered head 25 of the T-shaped metal plate 24 is embedded into the fiber of the outer skin 10. The tapered head 25 is used for fixing the position of the metal embedded part 20, and preventing the metal embedded part 20 from being displaced due to external force factors.

[0047] 8) The fiberglass cloth is cut into small pieces to fill the filling hole 2323 of the non-load-bearing area 22, and is compacted.

[0048] 9) According to the requirement, the inner skin 30 of the composite packaging box is laid on the metal embedded part 20, the thickness of the inner skin 30 is 5 mm, and the composite packaging box is continuously manufactured according to the predetermined forming process of the packaging box. The predetermined forming process can be the existing conventional forming process, or a uniquely designed forming process, and the present application is not limited.

[0049] Although the present application has been disclosed as above with examples, it is not intended to limit the present application, and the appropriate modification or equivalent replacement of the technical solutions of the present application made by those skilled in the art should be covered in the protection scope of the present application, and the protection scope of the present application is limited by the claims.

Claims

1. A method of preventing delamination of a metal embedded structure in the interior of a composite packaging box, characterized by, The method comprises the following steps: 1) design and manufacture the structure of the metal embedded part, the main body of which comprises a bearing area and a non-bearing area, the non-bearing area is linearly arrayed or circularly arrayed around the bearing area to form filling holes; four T-shaped metal plates are welded around the main body, each of which is provided with a conical head on one side; 2) lay the outer skin of the composite package box; 3) cut the fiber cloth according to the size and hole position of the metal embedded part, and fix the cut fiber cloth on the upper and lower surfaces of the main body of the metal embedded part with a predetermined agent; 4) use fiber yarn to pass through the filling holes of the non-bearing area of the metal embedded part in an up-down interlacing manner to weave the fiber cloth fixed on the upper and lower surfaces; 5) use the fiber cloth to wrap the main body of the metal embedded part; 6) use the fiber yarn to wrap the T-shaped metal plates around, and use the predetermined agent to fix them; 7) place the metal embedded part treated in step 6) at a designated position, with the side provided with the conical head facing the outer skin, and knock the conical head into the outer skin; 8) cut the fiber cloth into small pieces, fill them into the filling holes of the non-bearing area of the metal embedded part, and compact them; 9) lay the inner skin of the composite package box on the metal embedded part treated in step 8), and manufacture the composite package box according to the predetermined molding process of the package box.

2. The method of claim 1, wherein, The bearing area of the metal embedded part is in a solid structure or a hollow structure.

3. The method of claim 1, wherein, The height of the conical head is less than the thickness of the outer skin.

4. The method of claim 1, wherein, The metal embedded part is polished and wiped after being manufactured to keep the surface clean and free of stains.

5. The method of claim 1, wherein, The fiber cloth is selected from glass fiber square cloth.

6. The method of claim 1, wherein, The fiber yarn is selected from glass fiber yarn.

7. The method of claim 1, wherein, The joints of the fiber cloth are fixed with a predetermined agent.

8. The method of claim 1, wherein, The conical head is knocked into the outer skin with a leather hammer.

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