KR101395992B1 - Manufacturing device of reinforced thermoplastic impact bumper beam - Google Patents

Abstract

The present invention relates to a plastic bumper beam, a method and an apparatus for manufacturing the plastic bumper beam, a plastic bumper beam made of an extrusion molding material, Comprising the steps of: preparing a reinforcing fiber yarn; heating the reinforcing fiber yarn; extruding the reinforcing fiber yarn and a synthetic resin or a composite material; and molding the extrusion molding material in the form of a bumper beam A method of manufacturing a bumper beam; And a heater disposed at a rear end of the unwinder to heat the reinforcing fiber yarn and a reinforcing fiber yarn provided at a rear end of the heater to extrude the reinforcing fiber yarn and a synthetic resin or a composite material An extruder, and a metal mold provided at a rear end of the extruder, thereby making it possible to mass-produce high quality plastic bumper beams having various sectional shapes at low cost.

Description

Technical Field [0001] The present invention relates to a manufacturing apparatus for a plastic bumper beam,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the manufacture of automobile bumper beams, and more particularly, to a plastic bumper beam capable of implementing various sectional structures through continuous production, and a manufacturing method and apparatus thereof.

The bumper is disposed at a predetermined position of a front end portion and a rear end portion of the vehicle, and absorbs the impact energy in the event of a collision or a collision, thereby minimizing damage to the vehicle body and personal injury.

1, a bumper beam 10 fixed to the vehicle body by the stay 11, a bumper beam 10 fixed to the vehicle body by the stay 11, 10), and a bumper cover (not shown) provided at the front end of the shock absorbing member.

Here, the bumper beam (impact beam) 10 has been conventionally made of a steel material having a sectional structure of a closed or C shape. However, recently, as the vehicle is made lighter and more compact in order to improve fuel economy, the mounting space of the bumper becomes narrower, In order to simplify the design, the protrusion of the bumper outer face is suppressed as much as possible, and development of a bumper beam of a variety of low-weight, ultra-rigid materials capable of satisfying such demands is required.

However, the bumper beam of steel or aluminum imposes a curvature to satisfy the performance of the bumper or increases the degree of freedom of the cross-sectional shape.

In addition to the above-described metal bumper beams, plastic bumper beams have also been used, and conventional plastic bumper beams have been produced by compression or injection of glass reinforced plastic. However, this molding method is difficult to maintain a constant curved surface, to fill the required localized position with the reinforcing material alone, to require separate work for the separate insert, and to maintain the position of the reinforcing material. Further, in the case of the above-described molding method, it is difficult to increase the strength because a hollow sectional structure can not be realized. Particularly, in the case of injection molding, a thick product can not be molded, so there is a limit to increase the strength, and therefore, it is not suitable for impact products requiring high strength. As a result, a press molding method using glass reinforced plastic is used for high impact impact products. However, in the case of such press forming, since thickness molding is limited, the strength is increased by filling the reinforcing material, .

Therefore, in the conventional method of manufacturing a plastic bumper beam, there is a limitation in securing a weight and securing a mounting space, and a separate reinforcing sheet is also required for forming a composite material in which a reinforcing sheet is added for reinforcing rigidity. There is a disadvantage in that the cost is increased because a molding step is added.

SUMMARY OF THE INVENTION The present invention has been made to solve the problems of the prior art described above, and it is an object of the present invention to provide a lightweight, high rigidity product which is easy to supplement and maintain strength and rigidity, And to provide a plastic bumper beam capable of reducing costs and a manufacturing method and apparatus thereof.

As means for solving the above-mentioned technical problem,

The present invention provides a bumper beam constituting a bumper of a vehicle, wherein the material of the bumper beam is an extrusion molding material.

In this case, the plastic bumper beam may have a rounded shape.

In this case, the extrusion molding material may be composed of a reinforcing fiber yarn, a synthetic resin, or a composite.

In this case, the reinforcing fiber yarn may be made of at least one selected from the group consisting of steel, glass fiber, carbon fiber, bazaar fiber, aramid fiber, PET fiber, PA fiber, polyethylene fiber, PBO fiber and silicon carbide fiber.

In this case, at least one hollow portion may be formed inside the plastic bumper beam.

In this case, the hollow portion may be filled with a reinforcing material or a cushioning material.

(B) a step of heating the reinforcing fiber yarn; (c) a step of extruding the reinforcing fiber yarn and a synthetic resin or a composite material; and (d) ) Molding the extrusion molding material obtained in the step (c) in the form of a bumper beam.

In this case, the manufacturing method of the plastic bumper beam may further include (e) continuously bending the bumper beam in the step (d).

In this case, the manufacturing method of the plastic bumper beam may further include the step (f) of cutting the bumper beam continuously in the step (e).

In this case, in the step (a), the reinforcing fiber yarn may include at least one selected from a reinforcing fiber yarn in the form of a prepreg tape, a filament yarn in a filament state, or a fiber yarn in an unmigrated state.

In this case, the speed of each step can be controlled so that the process can be performed continuously.

According to another aspect of the present invention, there is provided a method of manufacturing a reinforcing fiber sheet, comprising the steps of: providing an unwinder for supplying reinforcing fiber yarn; a heater installed at a rear end of the unwinder for heating the reinforcing fiber yarn; There is provided a plastic bumper beam manufacturing apparatus comprising an extruder for extruding a material and a mold provided at a rear end of the extruder.

In this case, an arranging unit may be provided between the un-winder and the heater to uniformly arrange the reinforcing fiber yarn supplied from the un-winder and enter the heater.

Further, a curvature generator or a cutter may be installed at a rear end of the mold.

According to the present invention, various cross-sectional designs including a hollow cross-sectional shape are possible by extruding a synthetic resin or a composite material including a reinforcing fiber yarn to produce a bumper beam.

Further, it is possible to reinforce the stiffness at the designated position by simultaneously extruding the continuously supplied stiffener and the synthetic resin or the composite material, and to produce bumper beams of various functions having the energy absorbing layer at a specific position by simultaneously extruding the foam or the like have.

In addition, it is possible to obtain economically advantageous effects by continuously producing a lightweight bumper beam having fewer deterioration by the implementation of various manufacturing methods and having a reinforcing material and an absorbing material.

Figures 1A-1C illustrate a conventional glass-reinforced plastic plastic bumper beam assembly,
2 is a perspective view of a plastic bumper beam according to a preferred embodiment of the present invention,
Figure 3 is a side view of a plastic bumper beam according to a preferred embodiment of the present invention,
4 is a vertical sectional view showing an internal structure of a plastic bumper beam according to a preferred embodiment of the present invention,
5 and 6 are conceptual diagrams showing an apparatus for manufacturing a plastic bumper beam according to a preferred embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In order to clearly explain the present invention, parts not related to the description are omitted, and similar parts are denoted by similar reference numerals throughout the specification.

First, the present invention is roughly divided into a plastic bumper beam, a method of manufacturing a plastic bumper beam, and a manufacturing apparatus of a plastic bumper beam.

FIG. 2 is a perspective view of a plastic bumper beam according to a preferred embodiment of the present invention, FIG. 3 is a side view of a plastic bumper beam according to a preferred embodiment of the present invention, Sectional view showing the internal structure of the first embodiment.

2 to 4, the plastic bumper beam 100 according to the preferred embodiment of the present invention is used to protect the passenger by absorbing an impact applied from outside in the event of a vehicle accident, and to minimize damage to the vehicle, (190) at the front end and the rear end of the vehicle, respectively.

In this case, in the present invention, the plastic bumper beam 100 is made of an extrusion molding material. That is, by fabricating the plastic bumper beam 100 in an extrusion molding method having a higher degree of freedom in design than compression molding or injection molding, various cross-sectional structures are realized to improve strength and rigidity. Hereinafter, various cross-sectional structures that can be realized in the present invention will be described in detail with reference to FIG.

First, a hollow portion 110 may be formed inside the plastic bumper beam 100 (see FIG. 4A). If the plastic bumper beam 100 is hollow, it is possible to increase the strength and reduce weight. In the present invention, the hollow portion 110 may be formed of one or more than one as needed, and is not particularly limited.

In this case, the shock absorbing structure 120 is formed in front of or behind the hollow portion 110 (see FIG. 4B) or integrally formed with the different material 130 (see FIG. 4C) ). In this case, it is possible to provide local stiffness reinforcement and functionality to a necessary portion.

4 (d) and (e)), the performance of the glass-reinforced plastic plastic bumper beam which is conventionally formed by compression or injection is improved by filling the hollow portion 110 with the reinforcing material 140 or the buffer material 150 And the strength limit can be overcome, which makes it highly applicable to large vehicles.

The plastic bumper beam 100 constructed as described above can be rounded in consideration of curvature and impact performance of the bumper cover. In this case, a method of imparting the curvature to the plastic bumper beam 100 will be described later in detail.

As described above, according to the present invention, the shape of the plastic bumper beam 100 is variously realized by taking advantage of the advantage of extrusion molding, so that the specific performance and function required can be imparted freely.

The plastic bumper beam according to the preferred embodiment of the present invention has been described above. Hereinafter, a method of manufacturing a plastic bumper beam according to a preferred embodiment of the present invention will be described.

A method of manufacturing a plastic bumper beam according to a preferred embodiment of the present invention includes the steps of preparing a reinforcing fiber yarn, heating the reinforcing fiber yarn, extruding the reinforcing fiber yarn and a synthetic resin or a composite material, The step of molding the ash into a form of a bumper beam is a basic step, and the step of bending or cutting the bumper beam may be further included.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention.

5 and 6 are conceptual diagrams showing an apparatus for manufacturing a plastic bumper beam according to a preferred embodiment of the present invention.

5 and 6, an apparatus 200 for manufacturing a plastic bumper beam according to a preferred embodiment of the present invention includes an unwinder 210, a heater 220, an extruder 230, And a mold 240, and may further include an exhaust unit 250, a curvature generator 260, a cutter 270, and the like.

In detail, the unwinder 210 is configured to continuously supply a plurality of wound and reinforced fiber yarns 290, and the un winder 210 may include a plurality of reinforcing fiber yarns 290, Respectively.

In the present invention, the reinforcing fiber yarn 290 is composed of any one or more selected from among steel, glass fiber, carbon fiber, bazaar fiber, aramid fiber, PET fiber, PA fiber, polyethylene fiber, PBO fiber and silicon carbide fiber And functions as a reinforcing material for extrusion molding.

In this case, the reinforcing fiber yarn 290 may be a reinforcing fiber yarn in the form of a prepreg impregnated with a synthetic resin, but may be a fiber yarn in a bobbled filament state alone or in a non- It is, of course, also possible to use a constant focusing element composed of fiber yarns in the state

Meanwhile, the reinforcing fiber yarn 290 passing through the unwinder 210 enters the heater 220 through the discharging unit 250. If the reinforcing fiber yarn 290 is composed of more than one reinforcing fiber yarn 290, it is possible to guide each fiber yarn in a certain direction.

The heater 220 is installed at the rear end of the un-winder 210 to heat the reinforcing fiber yarn 290. That is, in the case of the reinforcing fiber yarn (290), particularly, the fiber bundle itself has a limit of being sufficiently impregnated with the synthetic resin, so that the pre-heating process is performed before extrusion, thereby improving the impregnation rate with the synthetic resin.

Subsequently, the extruder 230 is installed at the rear end of the un-winder 210 in such a manner that the synthetic resin or the composite material is melted and extruded together with the reinforcing fiber yarn 290. In this case, it is preferable that the extrusion temperature and time of the extruder 230 are extruded singly or in multiple, under optimized conditions of the impregnation of the synthetic resin so as to maximize the binding force with the reinforcing fiber yarn 290.

The mold 240 is installed at the rear end of the extruder 230 in a configuration for molding the extruded product from the extruder 230 into the shape of the plastic bumper beam 100. That is, the through hole 241 of the mold 240 is formed into a cross-sectional shape of the plastic bumper beam 100 and is passed through the reinforced fiber yarn 290 preheated with the extruded synthetic resin or composite material, So that an internal structure can be formed.

The molded product passing through the mold 240 is discharged without being cured so as to be linearly deformable. Such a linear molded product can be round-shaped by the curvature generator 260.

Specifically, the curvature generator 260 is provided to continuously provide a curvature to the plastic bumper beam 100 by using a plurality of rollers 261, a disc 262, and the like at a rear end of the mold 240 . In this case, the installation number of the curvature generator 260 can be appropriately added or subtracted so as to realize various forms and curvatures more stably. Also, the shape of the curvature generator 260 can be adjusted .

The plastic bumper beam 100 produced in rounded shape by the curvature generator 260 is cut to a certain length using the cutter 270 according to the design specifications of the product. In this case, it is preferable to adjust the conveyance speed through the conveyor 280 and the roller 261 so that the continuous production can be performed while the plastic bumper beam 100 is cut.

As described above, according to the present invention, by applying the extrusion frame, diversification of design is realized, lightness and optimization are realized through reinforcement of many kinds of fiber yarns, and at the same time, Can be remarkably reduced.

The preferred embodiments of the present invention have been described in detail with reference to the drawings. It will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present invention as defined by the appended claims.

Therefore, the scope of the present invention is defined by the appended claims rather than the foregoing detailed description, and all changes or modifications derived from the meaning, range, and equivalence of the claims are included in the scope of the present invention. .

100: plastic bumper beam 110: hollow
120: Shock absorption structure 130: Dissimilar material
140: stiffener 150: cushioning material
190: stay 200: apparatus for manufacturing a plastic bumper beam
210: unwinder 220: heater
230: extruder 240: mold
241: Through hole 250:
260: curvature generator 261: roller
262: Disk 270: Cutter
280: Conveyor 290: Reinforced fiber yarn

Claims (14)

delete delete delete delete delete delete delete delete delete delete delete An unwinder for supplying reinforcing fiber yarn; A heater installed at a rear end of the unwinder to heat the reinforcing fiber yarn; An extruder installed at a rear end of the heater and extruding the reinforcing fiber yarn and the synthetic resin; And a mold provided at a rear end of the extruder. 13. The method of claim 12,
Wherein an arranger for arranging the reinforcing fiber yarn supplied from the unwinder and uniformly arranging the reinforcing fiber yarn into the heater is provided between the unwinder and the heater. 13. The method of claim 12,
Wherein a curvature generator or a cutter is installed at a rear end of the mold.

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