Manufacturing method of lifting bed framework base material for automobile

Abstract

The invention relates to the technical field of automobile manufacturing, in particular to a manufacturing method of a framework base material of a lifting bed for an automobile, which combines the use of an aluminum honeycomb and the improvement of a preparation process, PU (polyurethane) is heated to foam and permeate a glass fiber layer to enter pores of the aluminum honeycomb, and is solidified and extruded into a sheet under the pressure of a mold after being cooled and condensed. The bearing capacity of the vehicle-mounted bed board product is greatly improved, under the certain technical bearing requirement, the product is lighter in weight and more stable, and the light-weight target requirement of the automobile industry is better met.

Description

Technical Field

[0001] The invention relates to the technical field of automobile manufacturing, in particular to a method for manufacturing a frame substrate of a lifting bed for automobiles. Background Art

[0002] The statements in this section merely provide background information related to the present invention and do not necessarily constitute prior art.

[0003] In the traditional automobile industry, PHC boards are mainly used for spare tire covers in luggage compartments for load-bearing support. They are characterized by high strength, light weight, corrosion resistance, and thermal insulation and sound insulation. With the development of the automobile industry and the rapid increase in car owners' requirements for in-car functions and comfort, car bed boards are also becoming more and more popular with automobile manufacturers as technology innovates.

[0004] A vehicle bed board (bed frame substrate) is a device installed in a car, mainly used to provide additional sleeping space in the car, usually designed to be folded or disassembled to save space when not in use.

[0005] However, the vehicle bed boards in the prior art are mostly made of composite paper honeycombs, which have poor VOC (volatile organic compounds) performance in the vehicle odor. At the same time, the product needs to meet the load-bearing requirements, resulting in heavy weight and poor durability. Specifically, traditional vehicle bed boards will deform and make abnormal noises under a gravity of more than 50kg, and will cause load-bearing failure and abnormal noise problems under a gravity of more than 80kg, and there are problems with the appearance quality of parts such as cracking, hidden damage, wrinkling, burrs, scratches, and embossing.

[0006] Based on the above reasons, the present invention designs a method for manufacturing a base material of a car lift bed frame, and the selected material designs can meet the experimental requirements of odor and VOC, and at the same time have the characteristics of being more environmentally friendly and lightweight. Summary of the invention

[0007] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a method for manufacturing a base material of a car lift bed frame. The selected material designs can meet the experimental requirements of odor and VOC, and at the same time have the characteristics of being more environmentally friendly and lightweight.

[0008] In order to achieve the above object, the present invention provides a method for manufacturing a base material of a frame of a lifting bed for an automobile, comprising the following steps: S1, pulling the aluminum core strip through a stretching and shaping device to an aluminum honeycomb layer of a required size; S2, cutting the fiberglass coil into fiberglass sheets; S3, neatly placing glass fiber sheets on the front and back sides of the aluminum honeycomb layer to form an integral substrate; S4, spraying PU material on the glass fiber sheets arranged on the front and back sides in S3; S5, placing the entire substrate sprayed in S4 in a mold and heating it to 110°C to 120°C for foaming, and then cooling it to room temperature for molding and shaping.

[0009] The single layer usage of PU material ranges from 600 g / m 2 ~900g / m 2 .

[0010] The dosage range of single layer of glass fiber sheet is 400 g / m 2 ~600g / m 2 .

[0011] The aluminum honeycomb layer has a margin range of 4 mm to 6 mm, a wall thickness of 0.04 mm to 0.06 mm, and a diameter of 3 mm to 6 mm.

[0012] The thickness of the glass fiber sheet is 0.5mm to 1mm.

[0013] The spraying density of PU material is 200kg / m³~240kg / m³.

[0014] The die in S5 includes a cutting opening with a pressure of 20 t / m, and the gap of the die is adapted according to the thickness of the substrate.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The present invention combines the use of aluminum honeycomb with the improvement of the preparation process. The PU is heated and foamed to penetrate the glass fiber layer into the pores of the aluminum honeycomb. After cooling and condensation, it is solidified and extruded into a sheet under the pressure of the mold. The use of aluminum core strips avoids the common problem of poor odor performance of paper honeycombs in the prior art.

[0016] Among them, the three-dimensional structure of the interconnected hexagons of the aluminum honeycomb layer gives the material extremely high strength while maintaining its lightweight characteristics. The glass fiber structure and PU material provide additional strength and support to the aluminum honeycomb layer. A surface layer can also be set on the outside of the PU material to compound various decorative materials, such as fabrics or non-woven fabrics, to increase the aesthetics and functionality of the product.

[0017] The present invention greatly improves the load-bearing capacity of the vehicle-mounted bed board product. Under certain technical load requirements, the product is lighter and more stable, which is more in line with the lightweight target requirements of the automotive industry. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Schematic diagram of the experimental results of the present invention.

[0019] Figure 2 This is a schematic diagram of the product structure prepared by the present invention.

[0020] Figure 3It is a schematic diagram of the preparation process of the present invention.

[0021] Figure 4 It is a schematic diagram of the load-bearing experiment of the present invention.

[0022] Figure 5 This is a diagram showing the actual object of the present invention. DETAILED DESCRIPTION

[0023] It should be noted that the following detailed descriptions are illustrative and are intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meanings as those commonly understood by those skilled in the art to which the present application belongs.

[0024] The present invention will now be further described in conjunction with the accompanying drawings. Figure 1 to Figure 3 : Embodiment 1: A method for manufacturing a base material of a car lifting bed frame of the present invention comprises the following steps (reference Figure 3 shown): S1, pulling the aluminum core strip through a stretching and shaping device to an aluminum honeycomb layer of a required size; S2, cutting the fiberglass coil into fiberglass sheets; S3, 0.5 mm thick glass fiber sheets are neatly placed on the front and back sides of the aluminum honeycomb layer to form an integral substrate; S4, spraying PU material with a density of 200kg / m³ on the glass fiber sheets arranged on the front and back sides in S3; S5, place the whole substrate sprayed in S4 in the mold and heat it to 110℃ for foaming, and wait for it to cool to room temperature for molding and shaping (refer to Figure 2 as shown).

[0025] The single layer usage of PU material ranges from 600 g / m 2 .

[0026] The dosage range of single layer of glass fiber sheet is 400 g / m 2 .

[0027] The aluminum honeycomb layer has an edge range of 4mm, a wall thickness of 0.04mm and a diameter of 3mm.

[0028] The die in S5 includes a cutting opening with a pressure of 20 t / m, and the gap of the die is adapted according to the thickness of the substrate.

[0029] Embodiment 2: A method for manufacturing a base material of a car lifting bed frame of the present invention comprises the following steps (reference Figure 3 shown): S1, pulling the aluminum core strip through a stretching and shaping device to an aluminum honeycomb layer of a required size; S2, cutting the fiberglass coil into fiberglass sheets; S3, 1 mm thick glass fiber sheets are neatly placed on the front and back sides of the aluminum honeycomb layer to form an integral substrate; S4, spraying PU material with a density of 240kg / m³ on the glass fiber sheets arranged on the front and back sides in S3; S5, place the whole substrate after spraying in S4 in the mold and heat it to 120℃ for foaming, and wait for it to cool to room temperature for molding and shaping (refer to Figure 2 as shown).

[0030] The single-layer usage range of PU material is 900g / m2.

[0031] The dosage range of single layer of glass fiber sheet is 600g / m2.

[0032] The aluminum honeycomb layer has an edge range of 6mm, a wall thickness of 0.06mm and a diameter of 6mm.

[0033] The die in S5 includes a cutting opening with a pressure of 20 t / m, and the gap of the die is adapted according to the thickness of the substrate.

[0034] Embodiment 3: A method for manufacturing a base material of a car lifting bed frame of the present invention comprises the following steps (reference Figure 3 shown): S1, pulling the aluminum core strip through a stretching and shaping device to an aluminum honeycomb layer of a required size; S2, cutting the fiberglass coil into fiberglass sheets; S3, 0.8 mm thick glass fiber sheets are neatly placed on the front and back sides of the aluminum honeycomb layer to form an integral substrate; S4, spraying PU material with a density of 220kg / m³ on the glass fiber sheets arranged on the front and back sides in S3; S5, place the whole substrate sprayed in S4 in the mold and heat it to 115℃ for foaming, and wait for it to cool to room temperature for molding and shaping (refer to Figure 2 as shown).

[0035] The single-layer usage of PU material ranges from 800 g / m2.

[0036] The dosage range of single layer of glass fiber sheet is 500 g / m2.

[0037] The aluminum honeycomb layer has an edge range of 5mm, a wall thickness of 0.05mm and a diameter of 4mm.

[0038] The die in S5 includes a cutting opening with a pressure of 20 t / m, and the gap of the die is adapted according to the thickness of the substrate.

[0039] In the above-mentioned embodiments 1-3 of the present invention, the purpose of using a single layer of PU material is to ensure the strength of the product and the setting of a reasonable PU penetration amount while meeting the bearing strength requirements; the purpose of using a single layer of glass fiber sheet is to select a gram weight range with a high cost performance that meets the process requirements of this application from an economic point of view.

[0040] In the above-mentioned embodiments 1-3 of the present invention, the margin range and wall thickness range of the aluminum honeycomb layer are the preferred choices based on the combination of economic performance and reasonable control of odor VOC under the premise of meeting the process requirements of this application.

[0041] See also Figure 1 The product prepared by the present invention meets the following requirements: under a pressure of 200KG, the product has a sinking displacement of 6mm, and under a pressure of 225KG, the product has a sinking displacement of 7mm, thus meeting the load-bearing requirements.

[0042] The above are only preferred embodiments of the present invention, which are only used to help understand the method and core ideas of the present application. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

[0043] The present invention solves the problems in the prior art of using paper honeycombs to make PHC boards for vehicle bed boards, such as excessive VOC odor, heavy bed board weight, extended abnormal noise, load-bearing failure, abnormal noise, and the appearance quality of parts such as cracking, hidden damage, wrinkling, burrs, scratches, and embossing. By improving and optimizing the materials, preparation technology, preparation parameters and process of the vehicle bed board, the vehicle bed board product has low odor, light weight, easy to experiment, and higher comprehensive performance of load-bearing capacity and stability, which provides help for the lightweight development of the automotive industry and the improvement of car owner satisfaction.

Claims

1. A method for manufacturing a frame substrate of a car lift bed, characterized in that: The following steps are involved: S1, pulling the aluminum core strip through a stretching and shaping device to an aluminum honeycomb layer of a required size; S2, cutting the fiberglass coil into fiberglass sheets; S3, neatly placing the glass fiber sheets on the front and back sides of the aluminum honeycomb layer to form an integral substrate; S4, spraying PU material on the glass fiber sheets arranged on the front and back sides in S3; S5, placing the entire substrate sprayed in S4 in a mold and heating it to 110° C. to 120° C. for foaming, and then cooling it to room temperature for molding.

2. The method for manufacturing a frame substrate of a vehicle lift bed according to claim 1, characterized in that: The single layer usage range of the PU material is 600g / m 2 ~900g / m 2 .

3. The method for manufacturing a frame substrate of a vehicle lift bed according to claim 1, characterized in that: The amount of the glass fiber sheet per layer is 400 g / m 2 ~600g / m 2 .

4. The method for manufacturing a frame substrate of a vehicle lift bed according to claim 1, characterized in that: The aluminum honeycomb layer has a margin range of 4 mm to 6 mm, a wall thickness of 0.04 mm to 0.06 mm, and a diameter of 3 mm to 6 mm.

5. The method for manufacturing a frame substrate of a vehicle lift bed according to claim 1, characterized in that: The thickness of the glass fiber sheet is 0.5 mm to 1 mm.

6. The method for manufacturing a frame substrate of a vehicle lift bed according to claim 1, characterized in that: The spraying density of the PU material is 200kg / m³ to 240kg / m³.

7. The method for manufacturing a frame substrate of a vehicle lift bed according to claim 1, characterized in that: The mold in S5 includes a cutting opening with a pressure of 20 t / m, and the gap of the mold is adapted according to the thickness of the substrate.

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