阅读说明：本技术 一种纤维局部增强塑料备胎仓及生产方法 (Fiber local reinforced plastic spare tire bin and production method thereof ) 是由 宋建龙 刘帅 魏强 王建飞 刘臣 于 2019-10-28 设计创作，主要内容包括：本发明提供一种纤维局部增强塑料备胎仓及生产方法,属于一种汽车用备胎仓。包括材料选择、设计规范、有限元分析指导设计及分析、连续纤维板热压成型、连续纤维板水切和预埋注塑。本发明通过连续纤维板局部增强成型方法,使用0.6mm及1.0mm连续纤维板叠加方式替代部分热压备胎仓3.0mm厚度的结构,通过有限元仿真分析优化数据,最终产品在满足性能的前提下,产品减重30％左右；连续纤维板局部增强成型备胎仓单件价格与热压成型备胎仓持平；较传统的金属冲压备胎仓、塑料热压备胎仓在满足等同性能前提下,产品重量更轻。更适用于现代及未来乘用车的应用和发展,随着未来汽车工业发展,将越来越多的应用在更多的汽车零部件上。(The invention provides a fiber local reinforced plastic spare tire bin and a production method thereof, belonging to a spare tire bin for an automobile. The method comprises the steps of material selection, design specification, design and analysis guided by finite element analysis, continuous fiber board hot press molding, continuous fiber board water cutting and pre-buried injection molding. According to the invention, by adopting a local reinforcing and forming method of the continuous fiber board, a 0.6mm and 1.0mm continuous fiber board superposition mode is used for replacing a part of hot-pressing spare tire bin 3.0mm thick structure, and data is optimized through finite element simulation analysis, so that the weight of a final product is reduced by about 30% on the premise of meeting the performance; the price of the single part of the continuous fiber board local reinforced molding spare tire bin is equal to that of the hot press molding spare tire bin; compared with the traditional metal stamping spare tire bin and plastic hot pressing spare tire bin, the product weight is lighter on the premise of meeting the equivalent performance. The automobile is more suitable for application and development of modern and future passenger automobiles, and with development of the automobile industry in the future, the automobile is more and more applied to more automobile parts.)

1. The utility model provides a local reinforced plastics spare tyre storehouse of fibre which characterized in that: is prepared by the following steps:

material selection:

the mould pressing material is selected from a polypropylene base material continuous fiberboard with the thickness of 0.6mm, the glass fiber content of 69 percent and the anisotropy of 4:1 and a polypropylene base material continuous fiberboard with the thickness of 1.0mm, the glass fiber content of 69 percent and the anisotropy of 4: 1; the injection molding material is glass fiber reinforced polypropylene, and the glass fiber content is 50%;

(II) design specification:

(1) the corners of the continuous fiber board adopt round corners, so that the compression molding is facilitated;

(2) the height of the convex-concave platform of the continuous fiberboard is in direct proportion to the die drawing angle, so that the continuous fiberboard is convenient to be molded by pressing;

(3) the continuous fiber board part and the injection molding material part need to have a bonding effective length so as to increase the bonding force;

(4) the installation structure needs injection molding material polypropylene to complete injection molding, and the installation thickness is met;

(5) the reinforcing ribs have the functions of enhancing performance and guiding glue;

(III) guiding design and analysis results by finite element analysis:

(1) the analysis of the continuous fiberboard compression molding is completed by applying molding analysis software, and the R angle, the die drawing, the flanging height and the concave-convex platform height in the continuous fiberboard molding are optimized through the analysis;

(2) the performance analysis software is applied to complete the product performance analysis, the material thickness, the number of reinforcing ribs and the positions of the reinforcing ribs of the polypropylene injection molding part of the injection molding material are optimized through analysis, and the reinforcing structure of the weak part of the continuous fiberboard part is verified through analysis;

(IV) production Process

(1) Hot-press forming of the continuous fiber board: setting the temperature of a heating furnace at 220 ℃, the heating time at 120s, simultaneously respectively placing two continuous fiber boards in the furnace for heating, setting the parameters of a press, the pressure at 120T and the pressure maintaining time at 30s, and after the materials are heated, placing two sheets in a hot-pressing mold in a cross-shaped mode for hot pressing;

(2) continuous fiber board water cutting: placing the hot-pressed continuous fiber board on a water cutting mould, and performing edge cutting and hole cutting on the continuous fiber board;

(3) pre-burying and injection molding: and (3) placing the cut continuous plate into an injection mold, adjusting injection molding parameters, setting the injection molding pressure to be 1000T, the pressure maintaining time to be 10s and the cooling time to be 40s, and taking out the product after the injection molding is finished.

2. The fiber reinforced plastic spare tire bin as claimed in claim 1, wherein: in the step (1) of the second step, the minimum round angle of the continuous fiber board cannot be smaller than 5 mm.

3. The fiber reinforced plastic spare tire bin as claimed in claim 1, wherein: in the second step (3), the continuous fiber board part and the injection molding material part need to have a combined effective length not less than 5 mm.

4. The fiber reinforced plastic spare tire bin as claimed in claim 1, wherein: in the step four (1), the two continuous fiber boards have the specifications of 1300mm × 300mm × 0.6mm and 960mm × 440mm × 1.0mm, respectively.

5. The production method of the fiber local reinforced plastic spare tire bin is characterized by comprising the following steps of:

material selection:

the mould pressing material is selected from a polypropylene base material continuous fiberboard with the thickness of 0.6mm, the glass fiber content of 69 percent and the anisotropy of 4:1 and a polypropylene base material continuous fiberboard with the thickness of 1.0mm, the glass fiber content of 69 percent and the anisotropy of 4: 1; the injection molding material is glass fiber reinforced polypropylene, and the glass fiber content is 50%;

(II) design specification:

(1) the corners of the continuous fiber board adopt round corners, so that the compression molding is facilitated;

(2) the height of the convex-concave platform of the continuous fiberboard is in direct proportion to the die drawing angle, so that the continuous fiberboard is convenient to be molded by pressing;

(3) the continuous fiber board part and the injection molding material part need to have a bonding effective length so as to increase the bonding force;

(4) the installation structure needs injection molding material polypropylene to complete injection molding, and the installation thickness is met;

(5) the reinforcing ribs have the functions of enhancing performance and guiding glue;

(III) guiding design and analysis results by finite element analysis:

(1) the analysis of the continuous fiberboard compression molding is completed by applying molding analysis software, and the R angle, the die drawing, the flanging height and the concave-convex platform height in the continuous fiberboard molding are optimized through the analysis;

(2) the performance analysis software is applied to complete the product performance analysis, the material thickness, the number of reinforcing ribs and the positions of the reinforcing ribs of the polypropylene injection molding part of the injection molding material are optimized through analysis, and the reinforcing structure of the weak part of the continuous fiberboard part is verified through analysis;

(IV) production Process

(1) Hot-press forming of the continuous fiber board: setting the temperature of a heating furnace at 220 ℃, the heating time at 120s, simultaneously respectively placing two continuous fiber boards in the furnace for heating, setting the parameters of a press, the pressure at 120T and the pressure maintaining time at 30s, and after the materials are heated, placing two sheets in a hot-pressing mold in a cross-shaped mode for hot pressing;

(2) continuous fiber board water cutting: placing the hot-pressed continuous fiber board on a water cutting mould, and performing edge cutting and hole cutting on the continuous fiber board;

(3) pre-burying and injection molding: and (3) placing the cut continuous plate into an injection mold, adjusting injection molding parameters, setting the injection molding pressure to be 1000T, the pressure maintaining time to be 10s and the cooling time to be 40s, and taking out the product after the injection molding is finished.

6. The method for producing the fiber local reinforced plastic spare tire bin as claimed in claim 5, wherein the method comprises the following steps: in the step (1) of the second step, the minimum round angle of the continuous fiber board cannot be smaller than 5 mm.

7. The method for producing the fiber local reinforced plastic spare tire bin as claimed in claim 5, wherein the method comprises the following steps: in the second step (3), the continuous fiber board part and the injection molding material part need to have a combined effective length not less than 5 mm.

8. The method for producing the fiber local reinforced plastic spare tire bin as claimed in claim 5, wherein the method comprises the following steps: in the step four (1), the two continuous fiber boards have the specifications of 1300mm × 300mm × 0.6mm and 960mm × 440mm × 1.0mm, respectively.

Technical Field

The invention relates to a spare tire bin for an automobile, in particular to a fiber local reinforced plastic spare tire bin and a production method thereof.

Background

The problems of energy shortage and environmental pollution become outstanding problems restricting the sustainable development of the automobile industry in China, and the automobiles with low oil consumption and low emission are needed for the development of the conservation-oriented society in consideration of social benefits and economic benefits. China is a big country for automobile production, and three problems are brought about by the development of the automobile industry, the increase of the automobile yield and the increase of the automobile holding capacity: the fuel consumption, the environmental protection, the safety and the maintenance cost, and corresponding regulations are made by all countries aiming at the three problems, so that people pay more attention to the light weight of the automobile.

The traditional fuel vehicle: experiments prove that if the weight of the whole automobile is reduced by 10%, the fuel efficiency can be improved by 6-8%; the oil consumption can be reduced by 0.3-0.6 liter per hundred kilometers when the mass of the vehicle is reduced by 100 kilograms; the weight of the automobile is reduced by 1 percent, and the oil consumption can be reduced by 0.7 percent.

The new energy vehicle comprises: the influence of energy and environment, new energy vehicle must obtain the rapid development, and the main factor that restricts the new energy development is the problem of endurance yet, and the most direct, the swift mode of increase of journey is just losing weight of vehicle, the lightweight of vehicle.

The traditional spare tire warehouse is mainly formed by metal stamping or hot-pressing, in order to meet the product performance requirement, the whole wall thickness of a hot-pressed product generally adopts 3.0mm, and the product weight is heavier.

The research and development of continuous fiber plate materials tend to be mature, all large material manufacturers at home and abroad have plate supplies with different types and different performances, the fiber plate is adhered in a surface mould injection molding mode at the present stage, and the continuous fiber plate material is widely applied and has mature application in a plastic front-end module and a plastic rear anti-collision beam.

Disclosure of Invention

The invention provides a fiber local reinforced plastic spare tire bin and a production method thereof, aiming at further reducing the weight of a product on the premise of meeting the requirement of equivalent performance with a hot-pressing spare tire bin.

The technical scheme adopted by the invention is as follows: is prepared by the following steps:

material selection:

the mould pressing material is selected from a polypropylene (PP) base material continuous fiberboard with the thickness of 0.6mm, the glass fiber content of 69 percent and the anisotropy of 4:1 and a polypropylene (PP) base material continuous fiberboard with the thickness of 1.0mm, the glass fiber content of 69 percent and the anisotropy of 4: 1; the injection molding material is glass fiber reinforced polypropylene (PP-GF50), and the glass fiber content is 50%;

(II) design specification:

(1) the fillet of the continuous fiberboard can not be smaller than 5mm at the minimum, so that the continuous fiberboard is convenient to be molded;

(2) the height of the convex-concave platform of the continuous fiberboard is in direct proportion to the die drawing angle, so that the continuous fiberboard is convenient to be molded by pressing;

(3) the continuous fiber board part and the injection molding material part need to have a bonding effective length not less than 5mm, so that the bonding force is increased;

(4) the installation structure needs injection molding material polypropylene (PP-GF50) to complete injection molding, so that the installation thickness is met;

(5) the reinforcing ribs have the functions of enhancing performance and guiding glue;

(III) guiding design and analysis results by finite element analysis:

(1) the analysis of the continuous fiberboard compression molding is completed by applying molding analysis software, and the R angle, the die drawing, the flanging height and the concave-convex platform height in the continuous fiberboard molding are optimized through the analysis;

(2) the performance of the product is analyzed by applying performance analysis software, the material thickness, the number of reinforcing ribs and the positions of the reinforcing ribs of the injection molding part of the injection molding material polypropylene (PP-GF50) are optimized by analysis, and the reinforcing structure of the weak part of the continuous fiberboard part is verified by analysis;

(IV) production Process

(1) Hot-press forming of the continuous fiber board: selecting one continuous fiberboard with the specification of 1300mm multiplied by 300mm multiplied by 0.6mm and the other continuous fiberboard with the specification of 960mm multiplied by 440mm multiplied by 1.0mm, setting the temperature of a heating furnace at 220 ℃, the heating time at 120s, simultaneously respectively placing two continuous fiberboards in the furnace for heating, setting the parameters of a press, the pressure at 120T and the pressure maintaining time at 30s, and after the material is heated, placing two sheets in a hot-pressing mold in a cross-shaped mode for hot pressing;

(2) continuous fiber board water cutting: placing the hot-pressed continuous fiber board on a water cutting mould, and performing edge cutting and hole cutting on the continuous fiber board;

(3) pre-burying and injection molding: and (3) placing the cut continuous plate into an injection mold, adjusting injection molding parameters, setting the injection molding pressure to be 1000T, the pressure maintaining time to be 10s and the cooling time to be 40s, and taking out the product after the injection molding is finished.

The invention has the advantages that:

by a local reinforcing and forming method of the continuous fiber plate, a 0.6mm and 1.0mm continuous fiber plate stacking mode is used for replacing a part of hot-pressing spare tire bin 3.0mm thick structure, data are optimized through finite element simulation analysis, and the weight of a final product is reduced by about 30% on the premise of meeting the performance; the price of the single part of the continuous fiber board local reinforced molding spare tire bin is equal to that of the hot press molding spare tire bin; the injection molding material is not only suitable for the glass fiber continuous fiber board, but also suitable for various carbon fiber continuous fiber boards, various carbon fiber glass fiber cloths, various carbon fiber glass fiber yarns, various glass fibers and fiber materials with carbon fiber contents; the fiber board base material is suitable for not only polypropylene (PP), but also thermoplastic materials such as various synthetic fibers of various polyamides (nylon, PA), Polyethylene (PE), phenylpropanolamine hydrochloride (PPA), and the like.

Compared with the traditional metal stamping spare tire bin and plastic hot pressing spare tire bin, the invention has lighter product weight on the premise of meeting the equivalent performance. The automobile is more suitable for application and development of modern and future passenger automobiles, and with development of the automobile industry in the future, the automobile is more and more applied to more automobile parts.

Drawings

FIG. 1 is a schematic structural view of the present invention, in which the dotted line is the boundary line between a continuous fiber sheet part molding part and a polypropylene (PP-GF50) glass fiber particle injection molding part;

FIG. 2 is a schematic structural view of a continuous fiber sheet of the present invention;

FIG. 3 is a schematic view of the structure of the injection molded part of the present invention;

FIG. 4 is a graph of the position of the applied palm pressure in the palm pressure stiffness test of the present invention;

FIG. 5 is a schematic representation of the strength test of the present invention.

Detailed Description

Is prepared by the following steps:

material selection:

the mould pressing material is selected from a polypropylene (PP) base material continuous fiberboard with the thickness of 0.6mm, the glass fiber content of 69 percent and the anisotropy of 4:1 and a polypropylene (PP) base material continuous fiberboard with the thickness of 1.0mm, the glass fiber content of 69 percent and the anisotropy of 4: 1; the injection molding material is glass fiber reinforced polypropylene (PP-GF50), and the glass fiber content is 50%;

(II) design specification:

(1) the fillet of the continuous fiberboard can not be smaller than 5mm at the minimum, so that the continuous fiberboard is convenient to be molded;

(2) the height of the convex-concave platform of the continuous fiberboard is in direct proportion to the die drawing angle, so that the continuous fiberboard is convenient to be molded by pressing;

(3) the continuous fiber board part and the injection molding material part need to have a bonding effective length not less than 5mm, so that the bonding force is increased;

(4) the installation structure needs injection molding material polypropylene (PP-GF50) to complete injection molding, so that the installation thickness is met;

(5) the reinforcing ribs have the functions of enhancing performance and guiding glue;

(III) guiding design and analysis results by finite element analysis:

(1) the analysis of continuous fiber board compression molding is completed by applying molding analysis software moldflow, and the R angle, the die drawing, the flanging height and the concave-convex platform height in the continuous fiber board molding are optimized through the analysis;

(2) the performance of the product is analyzed by using performance analysis software Hyperworks, the material thickness, the number of reinforcing ribs and the positions of the reinforcing ribs of the injection molding part of the injection molding material polypropylene (PP-GF50) are optimized by analysis, and the reinforcing structure of the weak part of the continuous fiberboard part is verified by analysis;

(IV) production Process

(1) Hot-press forming of the continuous fiber board: selecting one continuous fiberboard with the specification of 1300mm multiplied by 300mm multiplied by 0.6mm and one continuous fiberboard with the specification of 960mm multiplied by 440mm multiplied by 1.0mm, setting the temperature of a heating furnace at 220 ℃, the heating time at 120s, simultaneously respectively placing two continuous fiberboards in the furnace for heating, setting the parameters of a press, the pressure at 120T and the pressure maintaining time at 30s, and after the material is heated, placing two sheets in a hot-pressing mold in a cross-shaped mode for hot pressing;

(2) continuous fiber board water cutting: placing the hot-pressed continuous fiber board on a water cutting mould, and performing edge cutting and hole cutting on the continuous fiber board;

(3) pre-burying and injection molding: and (3) placing the cut continuous plate into an injection mold, adjusting injection molding parameters, setting the injection molding pressure to be 1000T, the pressure maintaining time to be 10s and the cooling time to be 40s, and taking out the product after the injection molding is finished.

The following explains the effects of the present invention by the results of performance analysis:

the palm pressure rigidity is realized, the product constraint is carried out according to the assembly state of a real vehicle, and 8 products are uniformly distributed on the productA circle is shown in figure 4, palm pressure is applied, the displacement is required to be less than 5mm, and the displacements at 8 positions are all less than 5mm through Hyperworks simulation analysis, so that the performance requirement is met;

a modal experiment, which is to carry out product constraint according to the assembly state of a real vehicle, test the first-order natural frequency of a product, wherein the frequency is more than 50Hz, and meet the performance requirement through simulation analysis;

and (3) testing the strength, performing product restraint according to the assembly state of the real vehicle, and simulating that the spare tire freely falls down from the position with the height of 500mm, wherein as shown in figure 5, the spare tire bin is not broken, and the performance requirements are met through simulation analysis.