WO2019098427A1

WO2019098427A1 - Method for manufacturing cowl cross member and cowl cross member manufactured thereby

Info

Publication number: WO2019098427A1
Application number: PCT/KR2017/013150
Authority: WO
Inventors: 손동일; 최동혁; 정인찬; 엄태용; 최완규; 김선경
Original assignee: 동국실업 주식회사
Priority date: 2017-11-20
Filing date: 2017-11-20
Publication date: 2019-05-23

Abstract

The present invention relates to a method for manufacturing a cowl cross member and a cowl cross member manufactured thereby and, more specifically, to a method for mounting a bracket of a heterogeneous material on a bent cowl cross member. The method for manufacturing a cowl cross member of the present invention comprises the steps of: opening a mold composed of a cope with a cavity formed therein and a drag; inserting a cowl cross pipe into the opened mold; closing the mold while the cowl cross pipe is inserted thereinto; injecting a resin into the closed mold; and opening the mold when the injected resin has cooled.

Description

A method for manufacturing a cow cross member and a cow cross member

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing a cowl cross member and a cowl cross member manufactured thereby, and more particularly, to a method of mounting a cowl cross member having a bent material on a bent cowl cross member.

Generally, a cowl panel is installed between a driver's seat and an engine room of a vehicle, and a steering device such as a handle and a storage device such as a glove box are generally installed on the cowl panel.

Further, in order to further support the cowl panel and the steering apparatus, it is common that the cowl cross members are installed in the left / right direction with respect to the vehicle body.

On the other hand, vehicles are equipped with various kinds of all kinds of components, and the components of this type generally include components of electrical and electronic systems related to the power transmission related to the starting system of the engine, Electronic control systems, headlamps, turn signal lamps, and electrical parts.

Generally, the conventional cowl cross member is generally formed of a steel material, but the cowl cross member is also required to be light in weight as the weight of automobiles is becoming lighter.

A problem to be solved by the present invention is to propose a relatively lightweight cowl cross member.

Another object to be solved by the present invention is to provide a method for preventing the occurrence of corrosion at a mounting site in mounting an assembly bracket of dissimilar materials on a cowl cross pipe.

Another problem to be solved by the present invention is to provide a method of joining an assembling bracket of dissimilar materials to a bending portion of a cow cross pipe constituting a cow cross member.

Another object to be solved by the present invention is to propose a method of molding a resin in a bending portion of a cow cross pipe.

Another problem to be solved by the present invention is to propose a method of managing the bending tolerance when the resin is formed at the bent portion of the cow cross pipe.

Another object of the present invention is to provide a method for preventing the shape of a cowl cross pipe from being deformed by resin injection pressure during resin injection.

To this end, a method of manufacturing a cow cross member of the present invention includes the steps of forming a mold comprising an upper mold and a lower mold with cavities formed therein, inserting a cowl cross pipe into the mold, Molding the mold, injecting the resin into the mold, and opening the mold when the injected resin is cooled.

The method of manufacturing the cow cross member according to the present invention and the cow cross member manufactured by this method, instead of using the conventional steel material, use a cow cross pipe made of aluminum, a magnesium assembly bracket and a resin injection bracket, And it is possible to reduce weight.

Further, in order to prevent the corrosion phenomenon occurring when the dissimilar materials are bonded, a covering member formed of a resin composition between different kinds of materials is coated on a cow cross pipe made of aluminum to prevent the occurrence of corrosion phenomenon.

In addition, when coating a cover member with a cow cross pipe made of an aluminum material having a bent shape, it is proposed to cover all portions of the bent aluminum bar for easy bending tolerance, and a method of covering the cover member of the cover member When injecting resin, inject air into both ends of the aluminum bar to prevent the shape of the aluminum bar from deforming to the injection pressure.

1 shows a cow cross member according to an embodiment of the present invention.

FIG. 2 illustrates a cowl cross pipe in which some sections are bent according to an embodiment of the present invention.

Fig. 3 shows an example in which a covering member is formed by using a resin in a bent portion of a cowl cross pipe.

4 is a view illustrating a process of forming a covering member and a resin injection bracket using resin in a cowl cross pipe having a bent portion according to an embodiment of the present invention.

FIG. 5 illustrates a method of injecting air into both ends of an insert of a cowl cross pipe according to an embodiment of the present invention, and an example in which a cow cross pipe is deformed without injecting air.

BRIEF DESCRIPTION OF THE DRAWINGS The foregoing and further aspects of the present invention will become more apparent from the following detailed description of preferred embodiments with reference to the accompanying drawings. Hereinafter, embodiments of the present invention will be described in detail so as to be easily understood and reproduced by those skilled in the art.

1 shows a cow cross member according to an embodiment of the present invention. Hereinafter, the structure and materials of a cow cross member according to an embodiment of the present invention will be described in detail with reference to FIG.

1, the cowl cross member is constituted by a cowl cross pipe, a bracket, a cover member, and the like. Of course, other configurations than those described above may be included in the cowl cross member proposed in the present invention.

The cowl cross pipe 110 is formed of a rod type, and is made of an aluminum material for weight saving. The bracket 130 (130a or 130b) is a bracket assembled or injected into a cowl cross pipe, and is made of magnesium or resin for weight reduction and rigidity. In addition, brackets that require relatively high rigidity are assembled with magnesium, while brackets that require relatively low rigidity are molded with resin.

As such, the cow cross pipe is made of aluminum, and when the bracket is made of magnesium or resin, it can be lighter than the conventional steel type cow cross member by about 30%.

The cover member 120 (see FIG. 2) is located between the cow cross pipe and the magnesium assembly bracket made of magnesium. When a magnesium assembly bracket is assembled in an aluminum cowl cross pipe, corrosion occurs at the assembly site due to the metal bonding of different materials. The present invention proposes a method of forming a cover member at a corresponding portion of a cowl cross pipe in which a magnesium assembly bracket is assembled to solve the above-mentioned problems with pipes. The cover member is molded using resin, and the magnesium assembly bracket is assembled (or mounted) in a state in which the covering member is molded on the cowl cross pipe. The resin injection bracket is injected into the cowl cross pipe together with the cowl cross pipe at the time when the covering member is injected.

FIG. 2 illustrates a cowl cross pipe in which some sections are bent according to an embodiment of the present invention. Like the pipe shown in FIG. 2, the cow cross pipe is required to be bent when necessary, and in this case, the cow cross pipe bends the necessary portion. In addition, when the magnesium assembly bracket is required to be assembled at the bent portion as described above, a covering member is formed at the corresponding portion.

Hereinafter, a method of forming the covering member on the cowl cross pipe will be described.

The present invention proposes a method of forming a covering member by an insert injection method on a cow cross pipe. The material of the covering member is preferably a resin, but is not limited thereto.

Fig. 3 shows an example in which a covering member is formed by using resin at the bent portion of the cowl cross pipe. 3 shows an example in which a cover member is formed by using resin only at a part of the bent portion of the cow cross pipe.

According to Fig. 3, when a covering member is formed by using resin only in a part of the bent portion, instead of forming the covering member by using resin in all of the bent portions, the mold should be designed so that the resin is injected into only the bent portion . In other words, a portion of the bent portion of the cow cross pipe where the covering member is formed is formed to be spaced apart from the surface of the cow cross pipe by a predetermined distance, while a portion where the covering member is not formed is formed on the surface of the cow cross pipe A cavity must be formed to closely contact the mold.

In other words, of the bent portions of the cow cross pipe, a portion where the covering member is formed does not cause any problem in that the covering member is formed even if some error occurs at a distance from the surface of the cow cross pipe. However, There is a problem that the injected resin is injected into the portion even if the surface of the cow cross pipe is not in close contact with the mold. In addition, when the cavity space in which the cowl cross pipe is inserted is made narrow, the cow cross pipe is not drawn into the cavity of the mold.

Particularly, in the case where the bending shapes of all bent cowl cross bars are not the same, even if one of the cowl cross pipes is inserted into the cavity of the mold, any other cowl cross pipe is not inserted into the cavity of the mold Occurs. As described above, the present invention proposes a method of managing the bending tolerance of the cow cross pipe.

The present invention proposes a method of forming a covering member on all the bent portions of the cowl cross pipe in order to solve the above-mentioned problems.

4 is a view illustrating a process of forming a covering member and a resin injection bracket using resin in a cowl cross pipe having a bent portion according to an embodiment of the present invention. Hereinafter, a process of forming a covering member and a resin injection bracket using resin in a cowl cross pipe having a bent portion according to an embodiment of the present invention will be described in detail with reference to FIG.

Referring to FIG. 4, the process of forming the cover member and the resin injection bracket on the cowl cross pipe includes a mold opening process, a cowl cross pipe insert process, a mold closing and injection process, a cooling process and a product extraction process. Of course, other steps other than the above-mentioned steps may be included in the process of forming the covering member on the cow cross pipe proposed in the present invention.

In the mold opening process, the mold formed by the upper mold and the lower mold is opened. The mold is formed with a cavity so that the cowl cross pipe can be inserted. The cavity includes a space in which the cow cross pipe is inserted, a space in which the cover member is formed, and a space in which a bracket made of resin is formed.

As described above, the cavity is formed so that the cover member can be formed on all the bent portions of the cow cross pipe, and the portion excluding the bent portion (except the portion where the resin injection bracket is formed) .

The cow cross pipe insert inserts a cow cross pipe into the cavity of the mold. According to Fig. 4, it can be seen that the cow cross pipe is inserted into the cavity of the mold.

In the mold closing and injection step, when the mold is closed, the resin is injected into the mold while the mold is closed. The number of the injection holes into which the resin is injected differs according to the number of the resin injection brackets and the number of the cover members to be assembled to the cow cross pipe.

In the cooling and product extraction steps, the injected resin is cooled while the resin is injected into the mold, and then the mold is opened to extract the products (the cowl cross pipe formed with the cover member and the resin injection bracket) formed in the cavity.

The present invention proposes a method of forming a covering member by using resin on all the bent portions of the cow cross pipe as described above.

In connection with the present invention, the bent portion of the cowl cross pipe is deformed by the injection pressure when the insert of the cowl cross pipe is injected. To this end, the present invention proposes a method of injecting air at both ends of a cow cross pipe to prevent deformation of the cow cross pipe at the time of injection. By injecting air from both ends of the cow cross pipe, it is possible to prevent deformation of the cow cross pipe when the cow cross pipe insert is injected.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, 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 scope of the present invention .

Claims

Forming a mold comprising a top mold and a bottom mold with cavities formed therein;

Inserting a cowl cross pipe into the mold;

Closing the mold while the cow cross pipe is inserted;

Injecting resin into the molded mold; And

And opening the mold when the injected resin is cooled.
The method according to claim 1,

The cowl cross pipe is partially bent,

Wherein the cavity is formed such that the entire surface of the bent portion is spaced apart from the surface of the cowl cross pipe so that the mold can be covered with the injected resin.
The cowl cross pipe according to claim 2, wherein the cowl cross pipe is made of an aluminum material,

Wherein the resin-coated bending section is mounted with an assembly bracket made of magnesium.
4. The method of claim 3, wherein, prior to injecting the resin,

Further comprising injecting air into the cowl crosspipe. &Lt; RTI ID = 0.0 > 11. < / RTI >
A cow cross member manufactured by a method of manufacturing a cow cross member according to any one of claims 1 to 4.