KR20110062257A - Method for manufacturing manifold for fuel cell and manifold manufactured thereby - Google Patents

Abstract

PURPOSE: A method for manufacturing a manifold for a fuel cell is provided to ensure adhesion of separate manifold without separate manifold through vibration welding, excellent durability. CONSTITUTION: A method for manufacturing a manifold for a fuel cell comprises the steps of: pressurizing two separate manifolds(110) to be contacted; and adhering the manifolds using frictional heat generated by applying vibration to one manifold. The manifold is injection-molded to have one or both of a joining pump and a joining guide.

Description

Method for manufacturing manifold for fuel cell and fuel cell manifold manufactured by this method {Method for manufacturing manifold for fuel cell and manifold manufactured}

The present invention relates to a fuel cell manifold manufacturing method and a fuel cell manifold manufactured thereby, and more particularly, a method for manufacturing a fuel cell manifold for stacking single manifolds of a single layer and combining them in a multilayer structure, The present invention relates to a fuel cell manifold.

In general, a fuel cell manifold (common distributor) is composed of a multilayer structure having many internal paths (or flow paths) including input and output path paths of hydrogen, air, and cooling water for supply to the stack side, which is an electricity generation source.

1 is a schematic diagram showing a conventional fuel cell manifold, and FIG. 2 is a schematic diagram showing a conventional fuel cell manifold.

Conventionally, in order to form the fuel cell manifold 10 in a multilayer structure, a plurality of individual manifolds 11 having individual paths 11a are disposed on the upper and lower surfaces as shown in FIG. 1, and the respective manifolds 11 An adhesive is applied to the path processing surface (upper and lower surfaces on which the individual paths 11a are formed), and then bonded by compression bonding.

When the adhesive is cured, the adhesive protruding to the outside of the manifold 10 is removed and manufactured as shown in FIG. 2.

However, in the conventional fuel cell manifold manufacturing method as described above, due to the difference in physical properties between the material of the manifold 10 and the material of the adhesive, there is a difference in volume change between heterogeneous materials under actual vehicle environmental conditions. Due to the difference of the adhesive force is a problem is caused, the airtight damage to the adhesive portion during long time operation, the durability of the manifold 10 is lowered and foreign matter flows into the internal path 12 of the manifold 10 There is.

Accordingly, there is a problem that ionic impurities that move along the flow path of the coolant may increase electrical conductivity, causing insulation problems, or blocking the internal path 12 to cause performance degradation.

In addition, in the case of the adhesive used in the bonding of the individual manifold (11), after the adhesive bonding removes the adhesive distributed on the outer surface of the manifold (10) and ultrasonic cleaning, even after the ultrasonic cleaning of the adhesive foreign matter over time There is also a problem that the generation amount gradually increases.

In addition, the existing fuel cell manifold is manufactured under the inevitable processing conditions of high speed rotation and low speed movement due to the properties of epoxy glass, and more than 20 days for one production due to the complicated and varied path shape. There is a problem that excessive production time such as this is used.

Therefore, the conventional fuel cell manifold has a very long time to process the path, so further processing for weight reduction is impossible, and even if time constraints are excluded, there is a limit in weight reduction due to the brittleness in the characteristics of the material.

In addition, due to the nature of the epoxy glass material, there is a problem in that the wet process is not possible due to the problem of moisture absorption, so that a large amount of fine powder is generated in the dry processing, thereby creating a hazardous environment that threatens worker health.

The present invention has been invented to solve the above problems, a method for manufacturing a fuel cell manifold for manufacturing a multi-layer by combining each individual manifold separately injection-molded using a plastic material by a vibration welding method and produced by this It is an object of the present invention to provide a fuel cell manifold.

In order to achieve the above object, the present invention pressurizes two individual manifolds to contact each other, and then uses a frictional heat generated by vibrating one of the individual manifolds so that the fuel cell manifold is characterized in that it is joined. Provides a method of making a fold.

In addition, the present invention provides a fuel cell manifold, in which a plurality of individual manifolds are stacked and joined by frictional heat generated by pressurizing and then vibrating the individual manifolds.

The present invention is excellent in adhesiveness by combining the individual manifolds constituting the fuel cell manifold by vibrating welding without an adhesive, the durability is improved, there is an effect that the discharge of foreign substances with the passage of the operating time does not occur.

In addition, since the individual paths are molded at the same time during the injection molding of the individual manifolds, the production period can be significantly shortened to ensure mass productivity.

In addition, it is possible to reduce the cost by eliminating the existing machining process and manual bonding process for the path processing, it is possible to obtain the effect of improving the working environment because no fine powder is generated.

In addition, the present invention is possible to maintain the minimum thickness and weight of the manifold to reduce the weight, thereby improving the performance of the fuel cell.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention, as used in the singular and the plural unless the context clearly indicates otherwise.

There may be a plurality of embodiments of the present invention, and overlapping descriptions of the same parts as in the prior art may be omitted.

The present invention relates to a fuel cell manifold manufacturing method and a fuel cell manifold manufactured thereby, by injection molding the individual manifolds constituting the manifold and then bonded to a multilayer structure by vibration welding to improve durability and performance It can reduce the production time and dramatically increase the productivity.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

3 is a perspective view showing a fuel cell manifold according to the present invention, Figure 4 is a perspective view showing an individual manifold according to the present invention, Figure 5 is a schematic diagram showing the manufacturing process of the manifold according to the present invention. 6 is a partially enlarged view showing a fusion state between individual manifolds according to the present invention.

As shown in FIG. 3, the fuel cell manifold 100 according to the present invention is configured by stacking a plurality of individual manifolds 110 in a multilayer structure.

The individual manifold 110 is injection molded using a plastic material, as well as the individual path (110c) during injection molding, as shown in Figure 4, the fusion welding (110a) and fusion guide for vibration welding 110b is formed.

The fusion acid 110a and the fusion guide 110b are formed on the path processing surface 115 of the individual manifold 110, and are portions formed between the individual manifolds 110 during vibration welding.

As shown in FIG. 5, the single manifold 110 of the single layer is laminated and fixed through the jig 120 to form the manifold 100 having a multilayer structure.

According to the present invention, in order to manufacture a manifold 100 having a multi-layer structure, two individual manifolds 110 are mounted on the upper jig 121 and the lower jig 122, respectively, and then the lower jig 122 is upper The upper jig 121 is vibrated in the horizontal direction while being pressed toward the jig 121.

At this time, the fusion mountain 110a and the fusion guide 110b of the first individual manifold 111 mounted on the upper jig 121 and the fusion mountain of the second individual manifold 112 mounted to the lower jig 122. The 110a and the fusion guide 110b are engaged with each other (the fusion acid 110a enters the inside of the fusion guide 110b).

Then, since the first individual manifold 111 is oscillated from side to side while the second individual manifold 112 is pressed, frictional heat is generated therebetween, and the frictional heat 110a of the plastic material is generated by the frictional heat. The fusion guide 110b is fused and two separate manifolds 110 are joined.

In the present invention, the fusion acid (110a) is formed to protrude above the path processing surface 115 at the outer surface of the individual path (110c), the fusion guide (110b) is a path processing surface 115 at the outer surface of the individual path (110c) The inner path 106 of the manifold 100 is hermetically formed as the fusion acid 110a of the individual manifold 110 and the fusion guide 110b are joined as described above.

7 is a cross-sectional view schematically showing an embodiment of a fusion welded manifold according to the present invention.

According to the present invention, two individual manifolds 110 are primarily fused, and then the individual manifolds 110 may be laminated and vibrated.

For example, as shown in FIG. 7A, the first individual manifolds 111 and the second individual manifolds 112 are first bonded by vibrating, and then the third individual manifolds 113 are first bonded. Vibration welding to be located at the bottom of the two separate manifold 112 can be bonded to the secondary.

In other words, the first individual manifold 111 is primarily pressed using frictional heat generated by vibrating the second individual manifold 112 while being pressed to contact the second individual manifold 112. After joining to form the manifold portion M1, the manifold portion M1 or the third individual manifold () is pressed while the third individual manifold 113 is pressed to contact the manifold portion M1. The third individual manifold 113 is secondarily joined to the manifold portion M1 by the frictional heat generated by vibrating the 113.

In addition, the fourth individual manifold 114 may be vibrated to be positioned below the plurality of individual manifolds 110 bonded to each other as shown in FIG. Manifold 100 is configured as can be produced.

Alternatively, as illustrated in FIG. 7C, a plurality of manifold portions M1 and M2 including two individual manifolds 110 which are first vibrated and joined together are constituted of plural manifold portions M1 and M2. It is also possible to fabricate the manifold 100 of the multilayer structure by vibrating ().

In other words, each of the manifolds M1 and M2 formed by joining two or more of the individual manifolds 110 is manufactured, and then the two manifolds M1 and M2 are pressed to contact each other. The manifold portions M1 and M2 are coupled through frictional heat generated by vibrating any one or both of them.

As described above, the present invention is capable of forming a multi-layered structure by additionally vibrating and combining separate individual manifolds 110 in a state where two separate manifolds 110 are coupled through vibration fusion. Freedom is increased.

The individual manifold 110 according to the present invention can be injection-molded by using a plastic material instead of an existing epoxy glass, and the fusion acid 110a and the fusion guide 110b and the individual path (for injection molding and vibration welding at the same time) 110c) and the like, so that the manufacturing period of the manifold 100 is shortened, thereby increasing the productivity.

In addition, since the fuel cell manifold according to the present invention has a coupling structure for fixing a plurality of individual manifolds 110 through vibration welding without adhesive, durability is prevented from being lowered due to a difference in volume change rate due to temperature change. It is possible to secure the bondability, durability and airtightness, and the introduction of foreign substances in the individual paths is suppressed, thereby improving the performance of the fuel cell.

While the invention has been shown and described with respect to certain preferred embodiments thereof, the invention is not limited to these embodiments, and has been claimed by those of ordinary skill in the art to which the invention pertains. It includes all the various forms of embodiments that can be implemented without departing from the spirit.

1 is a schematic diagram showing an individual manifold for a conventional fuel cell

Figure 2 is a schematic diagram showing a conventional fuel cell manifold

3 is a perspective view of a fuel cell manifold according to the present invention;

4 is a perspective view of an individual manifold according to the present invention;

5 is a schematic diagram showing a manufacturing process of the manifold according to the present invention.

6 is a partially enlarged view showing a fusion state between individual manifolds according to the present invention.

7 is a schematic cross-sectional view of an embodiment of a fusion welded manifold in accordance with the present invention.

<Description of the symbols for the main parts of the drawings>

100: manifold

106: internal path

110: individual manifold

110a: melted acid

110b: Fusion Guide

110c: individual path

111: first individual manifold

112: second individual manifold

113: third individual manifold

114: fourth individual manifold

115: path processing surface

120: jig

Claims (6)

And pressurizing the two individual manifolds (110) to contact each other, and then using the frictional heat generated by vibrating one of the individual manifolds (110). The method according to claim 1, The individual manifolds 110 are pressurized to be in contact with two or more manifold portions M1 and the separate individual manifolds 110, and then separate manifolds separate from the manifold portions M1. Fabrication of a fuel cell manifold, characterized in that the separate individual manifold 110 is further bonded to the manifold portion (M1) by using friction heat generated by vibrating any one selected from the (110). Way. The method according to claim 1, The individual manifolds 110 are pressurized to be in contact with two or more manifold portions M1 and separate manifold portions M2 configured separately therefrom, and then separate from the manifold portions M1. A fuel cell manifold, wherein the separate manifold portion M2 and the manifold portion M1 are joined to each other by using frictional heat generated by vibrating any one selected from the manifold portion M2. How to make a fold. The method according to any one of claims 1 to 3, The individual manifold 110 is injection molded to have one or both of the fusion acid (110a) and the fusion guide (110b) to the individual path (110c) and the outer shell of the individual path (110c), The method of manufacturing a fuel cell manifold, characterized in that the fusion fusion (110a) is inserted into the interior of the fusion guide (110b) fusion and bonded when bonding between the individual manifold (110). A plurality of individual manifolds (110) are laminated, the fuel cell manifold, characterized in that bonded by the heat of friction generated by pressing the individual manifold (110) and then vibrating. The method according to claim 5, An individual path 110c and a fusion guide 110b formed to be recessed with the fusion acid 110a protruding from the outer surface of the individual path 110c are formed in the individual manifold 110, and the fusion acid 110a is formed. ) Is a fuel cell manifold, characterized in that the fusion guide 110b is inserted into the fusion splicing.

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