阅读说明：本技术 碳框架及其制造方法 (Carbon frame and method for manufacturing same ) 是由 文培 于 2020-05-20 设计创作，主要内容包括：本发明涉及碳框架及其制造方法,提供能够提高扭转刚度的碳框架的制造方法及以此制造的碳框架,该方法包括：(a)准备至少两个泡沫的步骤；(b)用塑料分别包裹泡沫的步骤；(c)在塑料上层叠碳预浸料的步骤；(d)结合泡沫后放入模具的步骤；(e)向塑料内部注入热和风的步骤。(The present invention relates to a carbon frame and a method for manufacturing the same, and provides a method for manufacturing a carbon frame capable of improving torsional rigidity, and a carbon frame manufactured thereby, the method comprising: (a) a step of preparing at least two foams; (b) respectively wrapping the foams with plastics; (c) a step of laminating a carbon prepreg on a plastic; (d) placing the combined foam into a mold; (e) and injecting heat and wind into the plastic.)

1. A method of manufacturing a carbon frame, comprising:

(a) a step of preparing at least two foams;

(b) respectively wrapping the foams with plastics;

(c) a step of laminating a carbon prepreg on a plastic;

(d) placing the combined foam into a mold; and

(e) and injecting heat and wind into the plastic.

2. The method of manufacturing a carbon frame according to claim 1, further comprising: and bonding the connection parts of the foams.

3. The method for manufacturing a carbon frame according to claim 1, wherein: the prepregs laminated on the respective foams have different directivities from each other.

4. A carbon frame made by the method of any one of claims 1 to 3.

Technical Field

The present invention relates to a carbon frame and a method of manufacturing the same, and more particularly, to a carbon frame capable of improving torsional rigidity and a method of manufacturing the same.

Background

Generally, a frame is a structural member for maintaining the shape of machines, appliances, and devices, and is formed of various materials such as wood, metal, plastic, and the like. In particular, a framework of a carbon material having light weight and excellent strength has been recently developed and applied to various fields.

For example, in the case of bicycles, weight reduction is evaluated as an important factor for convenience of movement, transportation, and storage, and thus carbon frames have been applied so far. However, since the carbon frame is expensive, the carbon frame is generally only partially applied to an expensive product line or a main frame bearing the heaviest load.

The main frame receives loads applied from different directions such as a seat and a handle. That is, the weight of the user applied to the saddle, the weight and the pulling force of the user applied to the handle, and the like strongly press the upper end of the main frame. However, since the carbon frame has a flexible characteristic, a torsional load applied when the pedal is stepped on may become a greater problem.

For this reason, attempts are constantly being made to increase the torsional stiffness of the carbon framework, but no solution has yet been found.

Disclosure of Invention

Technical problem

The present invention has been made to solve the above-described problems of the prior art, and an object of the present invention is to provide a carbon frame capable of improving torsional rigidity, and a method for manufacturing the same.

Technical scheme

As a solution to the above-mentioned technical problem,

the present invention provides a method for manufacturing a carbon frame, comprising: (a) a step of preparing at least two foams; (b) respectively wrapping the foams with plastics; (c) a step of laminating a carbon prepreg on a plastic; (d) placing the combined foam into a mold; and (e) injecting heat and wind into the plastic.

In this case, the method of manufacturing the carbon frame may further include the step of bonding the connection portions of the foam.

In this case, the prepregs laminated on the respective foams may have different directivities from each other.

Further, the present invention provides a carbon frame manufactured by the above method.

Technical effects

According to the present invention, at least two frames are combined into one carbon frame, so that the load can be effectively dispersed.

In addition, a partition wall is formed at a portion where the frame is connected, so that the frame can be prevented from being twisted.

Also, the carbon prepregs of the respective frames have different directivities from each other, and thus can withstand loads applied from various directions.

Also, due to the above-described various effects, the torsional rigidity of the frame is improved, and thus it is expected to be applicable to bicycles and military products requiring more excellent rigidity.

Drawings

Fig. 1 to 4 are schematic views illustrating a manufacturing process of a carbon frame according to a preferred embodiment of the present invention;

FIG. 5 is a cross-sectional view of the foam shown in FIG. 4;

fig. 6 is a cross-sectional view of a carbon frame according to a preferred embodiment of the present invention.

Description of the reference numerals

100: the carbon frame 110: first foam

120: second foam 130, 140: plastic material

150. 160: carbon prepreg 170: resin binder

Detailed Description

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art to which the present invention pertains can easily carry out the invention. However, the present invention may be embodied in many different forms and is not limited to the embodiments described herein. In the drawings, portions that are not related to the description are omitted to clearly explain the present invention, and like reference numerals are given to like portions throughout the specification to explain the present invention.

Fig. 1 to 4 are schematic views illustrating a manufacturing process of a carbon frame according to a preferred embodiment of the present invention, fig. 5 is a sectional view of the foam shown in fig. 4, and fig. 6 is a sectional view of the carbon frame according to the preferred embodiment of the present invention.

Referring to fig. 1 to 6, a carbon frame 100 according to a preferred embodiment of the present invention is manufactured using foam.

The foam is a member for arranging the carbon prepregs 150, 160 in a mold (not shown), and may be formed of Expanded Polystyrene (EPS).

The present invention is technically characterized in that at least two foams having the same shape as the carbon frame 100 in a state of being coupled to each other are used. The carbon frame 100 is manufactured using two foams, i.e., the first foam 110 and the second foam 120.

The first and second foams 110 and 120 have a semicircular sectional structure and may form a circular sectional structure in a state of being coupled to each other. The sectional structure formed by the first foam 110 and the second foam 120 may be a circle, and may form an oval shape, a polygon shape, or an irregular shape mixing a circular part and an angular part according to the shape of the carbon frame 100, without being particularly limited.

In addition, although the shape in which one side of the foam is open is illustrated here, one side of the foam need not be open, and may be closed together with other sides.

Further, in order to achieve the required performance of the carbon frame 100, unlike the present embodiment, in the case of manufacturing the carbon frame 100 with 3 foams, a foam having a sectorial sectional structure with a central angle of 120 degrees may be used, and in the case of manufacturing the carbon frame 100 with 4 foams, a foam having a sectorial sectional structure with a central angle of 90 degrees may be used, and 5 or more foams may be used in the same manner.

When the first and second foams 110 and 120 are prepared, the first and second foams 110 and 120 are wrapped with plastic 130, 140, respectively. The plastic 130, 140 is used to bring the carbon prepregs 150, 160, described later, from the first and second foams 110, 120 into close contact with the mold.

Thereafter, the carbon prepregs 150, 160 are laminated on the plastics 130, 140, respectively. When the carbon prepregs 150 and 160 are stacked, the carbon frame 100 is stacked in multiple layers in consideration of the required performance. In this case, the carbon prepregs 150 and 160 may be laminated to have different directivities from each other.

Next, the first foam 110 and the second foam 120 on which the carbon prepregs 150, 160 are laminated are combined and placed in a lower mold, and after the upper mold is bonded, heat and wind are injected into the inside of the plastic 130, 140.

When high-temperature air is injected into the plastic 130, 140, the air enters between the foam 110, 120 and the plastic 130, 140 and expands the plastic 130, 140 in an outward direction, whereby the carbon prepregs 150, 160 laminated on the plastic 130, 140 are molded by high-temperature heat while being pressed to the inner wall of the mold.

Finally, the upper mold and the lower mold are separated, the molded product is taken out, and the foams 110 and 120 and the plastics 130 and 140 are removed, thereby completing the carbon frame 100 having a circular cross-sectional structure as shown in fig. 6, and the inside of the completed carbon frame 100 is formed with the opening side carbon prepreg 150 of the first foam 110 and the partition wall structure which is molded by being connected to the opening side carbon prepreg 160 of the second foam 120. In this case, resin adhesives 170 may be coated on both ends of the connection portion of the carbon prepreg 150 and the other carbon prepreg 160 to reinforce the bonding force.

As described above, the carbon frame 100 is manufactured to have a shape in which two frames are combined into one, and thus torsional rigidity can be improved. For example, in the case where the carbon frame 100 of the present invention is used as a main frame of a bicycle, when a torsional load is applied to the main frame by pedaling of a user, two frames constituting the carbon frame 100 absorb the load while being elastically deformed, respectively, and thus a load dispersion effect can be obtained. Further, since the carbon prepregs 150 and 160 in the present invention have different directivities from each other, even if a load is applied in a plurality of directions like a main frame of a bicycle, the load can be effectively dispersed.

However, even if the two frames disperse the load, the frames are damaged as long as a torsional load greater than or equal to the elastic deformation force of each frame is applied, however, in the present invention, the two frames are connected by the partition wall, and such partition wall suppresses the torsion of the frames, so that the frames can be prevented from being damaged.

Further, since the portions where the two frames are connected are reinforced by the partition walls having a structure in contact with the carbon prepregs 150 and 160 having different directivities from each other, a reinforcing force is applied from the outer wall side of the carbon frame 100 in addition to the partition walls.

The preferred embodiments of the present invention are described in detail above with reference to the accompanying drawings. The description of the present invention is for illustrative purposes, and those skilled in the art to which the present invention pertains will appreciate that the present invention may be readily modified into other specific forms without changing the technical spirit or essential characteristics thereof.

Therefore, the scope of the present invention should be determined by the appended claims rather than the above detailed description, and it should be construed that all modifications or variations derived from the meaning, scope and equivalent concept of the claims are included in the scope of the present invention.