KR102118857B1 - Manufacturing method of Cup holder - Google Patents

Abstract

The present invention provides a method of manufacturing a cup holder in which the holder body and the flap are integrally molded while minimizing the number of parts and the number of assembly processes. The present invention provides a holder body 110 in which a plurality of flaps 120 are integrally formed with at least one storage groove 101 in which the upper side is opened by injecting a polypropylene (PP) molten resin. The cup holder 100 is manufactured by a first injection molding step of molding and a second injection molding step of molding the flap rubber part 122 by injecting rubber into the flap 120. And the present invention is also performed a flap rotation step of rotating the flap 120 in the outward direction of the receiving groove 101. The cup holder 100 injection-molded by this flap rotation can be more easily taken out from within the mold apparatus. In addition, the present invention by further installing an elastic member to limit the rotation angle of the flap 120 on the rear surface of the holder body 110 and the flap 120, the flap due to fatigue due to repeated use of the flap (120) 120) to prevent the phenomenon of breakage or damage.

Description

Cup holder manufacturing method {Manufacturing method of Cup holder}

The present invention relates to a cup holder for a vehicle, and more specifically, it is possible to reduce the number of parts of the cup holder and reduce the assembly process, and according to a double injection process to easily take out the injection-molded cup holder in a mold apparatus It relates to a method of manufacturing a cup holder.

Vehicles are equipped with convenience facilities for passengers, such as a cup holder for a vehicle that stores cups or beverage containers of various sizes. And the structure of the cup holder may be various, but it is installed on the holder body and the holder body with a storage groove with an open top, and it is elastically rotated according to the diameter of the cup to safely store and store cups of various sizes. It can be said that the cup holder provided with a flap (that is, a guide) closely supporting the outer circumferential surface of the cup is most often used.

However, most vehicle cup holders can be said to have a structure in which various parts are assembled together. For example, Figure 1a shows a cup holder 1 in which a plurality of flaps 3 are formed for each of the storage grooves 2 and the storage grooves 2 for storing cups. The provided flap 3 is between the housing 4 supporting the flap 3 and the flap 3 and the housing 4 to elastically rotate the flap 4, as shown in FIG. 1B. The installed spring 5 is being assembled to each other in the state provided.

An example of such a cup holder is disclosed in Korean Patent Registration No. 10-0837086 (cup holder for automobiles, prior patent). The preceding patent also has a mechanism in which several parts work in conjunction with each other to safely store the cup while guiding the movement of the cup. As described above, the conventional cup holder requires a lot of parts necessary for the manufacture of the cup holder, and thus there is a problem in that it is not possible to reduce assembly work and manufacturing cost.

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In addition, most cup holders are manufactured by a process of injection molding by synthetic resin such as polypropylene. At this time, if the synthetic resin supplied for the molding of the cup holder is melted and cured, a part of the injection molded cup holder may be in contact with the internal components of the mold apparatus, in which case the injection molded cup holder is taken out of the mold apparatus. There was a problem that was not easy to do.

The present invention is to solve this problem, and to provide a method for manufacturing a cup holder without a separate assembly process while minimizing the number of parts. That is, through the double injection process, while providing the same function of the conventional cup holder, the manufacturing process and cost are minimized, and it can be said to substantially secure the competitiveness of the vehicle cup holder.

In addition, another object is provided to allow the injection molded cup holder to be easily taken out from the mold apparatus.

According to the present invention for achieving the above object, the upper mold and the lower mold in the assembled state by injecting polypropylene (PP) molten resin at least one storage groove opened upward, and the cup accommodated in the storage groove A first injection molding step of forming a holder body in which a plurality of flaps that are resiliently rotated according to the diameter of the body are integrally formed; A second injection molding step of molding a flap rubber part by injecting rubber into the flap; A first flap rotation step of rotating the flap toward the outside of the receiving groove for taking out the cup holder injection-molded by the second injection molding step; A second flap rotation step of further rotating the flap so that it is completely positioned outside the storage groove while moving the upper mold upward; And it provides a cup holder manufacturing method comprising a take-out step of taking out the injection-molded cup holder.

In the embodiment of the present invention, the first injection molding step is performed in a state in which the sliding core located on the side of the holder body is moved to the inside of the storage groove.

In the embodiment of the present invention, the first and second flap rotation steps, when the sliding core is horizontally moved and spaced apart from the receiving groove, a push pin disposed at a right angle with the sliding core is performed by an operation of pushing the flap. .

And according to an embodiment of the present invention, it may further include the step of installing an elastic member to limit the rotation angle of the flap on the back of the holder body and the flap of the cup holder taken out.

According to the present invention having such a configuration, a rubber injection molded flap is integrally molded on a holder body having a storage groove with an upward opening according to a double injection process, thereby minimizing the number of parts and the assembly process. And manufacturing cost reduction.

In addition, by rotating the flap formed integrally with the holder body to the outside of the storage groove, an advantage that the injection-molded cup holder can be easily taken out from the mold apparatus can be expected.

In addition, the present invention may further limit the rotation angle of the flap by further installing one elastic member on the outer circumferential surface of the holder body and the back surface of the flap, thereby preventing the flap from being easily broken or broken by fatigue due to repeated rotation of the flap. You may.

1A and 1B are a perspective view and a flap configuration of a general vehicle cup holder
Figure 2 is a perspective view showing the cup holder of the present invention
3A and 3B are schematic perspective and sectional views of a mold apparatus used for injection molding the cup holder of the present invention.
Figure 4 is a process for manufacturing the cup holder of the present invention

The present invention is a double injection molding method for primary injection molding a holder body in which a plurality of flaps protrude on an inner side of the receiving groove and the receiving groove with the upper portion opened, and a second injection molding of rubber on the flap. In addition to the method of manufacturing the holder, the injection-molded cup holder can be easily taken out from the mold apparatus according to the rotation of the flap.

Hereinafter will be described in more detail with respect to the present invention based on the embodiment shown in the drawings. As shown in FIG. 2, the cup holder 100 of the present invention includes a holder body 110 in which at least one storage groove 101 having an upper portion opened to accommodate a cup is formed, and a holder when an external force is not applied. The flap 120 connected to the holder body 100 is protruded inside the storage groove 101 of the main body 100 and is integrally formed with injection molding.

The flap 120 is located in the opening 121 formed vertically long in the side position of the storage groove 101, and rotates elastically according to the diameter of the cup to safely store and store cups of various sizes, such as the storage groove ( 101) serves to closely support the outer peripheral surface of the cup accommodated. As shown in the drawing, three embodiments are illustrated for each of the receiving grooves 101 at equal intervals along the circumferential direction as illustrated, but are not necessarily limited to a specific number.

In addition, the flap 120 is formed in a curved shape at a predetermined portion while forming a curved surface, and rubber is injected on the curved surface. These rubbers serve to closely support the outer circumferential surface of the cup when the cup is actually received, and the portion where the rubber is formed will be described as a flap rubber part 122 hereinafter.

The cup holder of the present invention is injection molded in order by the primary and secondary mold devices. For example, the holder body 110 provided with the flap 120 is first injection molded by PP melt resin in the first mold apparatus, and the first injection molded holder body 110 is inserted into the second mold apparatus. When the secondary mold device is injected, a second injection molding process is performed in which the rubber is injected to form the flap rubber part 122. As described above, in the present invention, the primary and secondary mold apparatuses are used. However, the primary and secondary mold apparatuses are general configurations already applied to the injection process, and thus detailed descriptions will be omitted.

Therefore, in the present invention will be described with reference to only a part of the mold apparatus according to the manufacturing process of the cup holder. However, referring to FIG. 3, the basic structure of the mold apparatus will be divided into the upper mold 22 and the lower mold 24, and the upper mold 22 and the lower mold according to the progress of the injection process. (24) is a structure that is separated from each other or assembled.

In addition, a molded part having a shape corresponding to that of the upper mold 22 and the lower mold 24 in a state where they are assembled to injection mold the shape of the cup holder 100 must be provided. In addition, in order to injection mold the holder body 110, a passage to be connected to an external PP injection unit for injecting the PP molten resin should be formed.
Through the passage, PP (polypropylene) molten resin is injected into the molding part and the holder body 110 is molded. In addition, a passage connecting the rubber injection part and the molding part of the outside may also be formed to supply rubber to the flap 120 to injection mold the flap rubber part 122. In addition, since these passages only need to connect the injection part and the molding part, various positions and shapes of the passages may be applied.

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The mold apparatus 20 is provided with a slide core 30. The slide core 30 forms an opening 121 on the side of the holder body 110 during injection molding, and the flap 120 protrudes into the storage groove 101 at a position where the opening 121 is formed. It plays a role of making. And the reason for protruding the flap 120 inside the receiving groove 101 is to injection mold the rubber on the flap 120 in a subsequent process.

The slide core 30 moves in the left-right direction by the drive bracket 40 (see FIG. 4), so that the flap 120 protrudes into the receiving groove 101 during the injection process. One end of the slide core 30 is positioned to be in close contact with the back surface of the flap 120. And this slide core 30 works in conjunction with the milpin 50 described below.

The slide core 30 is provided with a milpin 50 in a right angle direction. The milpin 50 serves to rotate the flap 120 in the outward direction of the receiving groove 101 so that the injection molded cup holder 100 can be easily taken out from inside the mold apparatus 20. The push pin 50 operates in conjunction with the drive bracket 40 by the driving force provided from the lower mold 24 side. That is, the driving bracket 40 is operated so that the slide core 30 moves to one side at the time when the push pin 50 is raised.
And the range of movement of the slide core 30 is until the flap 120 rotated by the mil pin 50 protrudes outwardly of the receiving groove 101. The milpin 50 has a predetermined length, and its cross-section is formed in a shape corresponding to the curved portion of the flap 120.

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Next, a method of manufacturing a cup holder using such a mold apparatus will be described, where the present embodiment will be described with reference to FIG. 4 showing a process of manufacturing the cup holder while showing only a part of the mold apparatus.

In the state where the upper mold 22 and the lower mold 24 of the mold apparatus 20 are assembled, as shown in FIG. 4(a), the sliding core 30 has an opening 121 of the holder body 110. While forming a state in which the flap 120 formed in the opening 121 is pushed toward the receiving groove, the mil pin 50 is disposed in a direction perpendicular to the sliding core 30. In this state, the primary injection process is performed. That is, the PP injection portion supplies the PP molten resin to the molding portion, and thus the holder body 110 will be injection molded by the PP molten resin.

The holder body 110, which is injection-molded according to the primary injection process, is located in the receiving groove 101, the opening 121 formed up and down at a side position of the receiving groove 101, and the opening 121 While the flap 120 protruding toward the inner direction of the receiving groove 101 is molded together. Therefore, it can be said that a cup holder that can be used to some extent can be completed only by the first injection process.

After the primary injection process is completed, a secondary injection process is performed to mold the flap rubber part 122 as shown in FIG. 4(b). The flap rubber part 122 refers to molding by injecting a rubber material into the curved surface of the flap 120. Therefore, when the flap rubber portion 122 is in close contact with the cup, the outer circumferential surface of the cup can be firmly supported, and thus cups of various sizes stored in the storage groove 101 can be safely stored.

And while the secondary injection process is in progress, the sliding core 30 and the milpin 50 maintain the same position as in the primary injection process. In this way, during the first injection process for forming the holder body 110 and the second injection process for forming the flap rubber part 122, the sliding core 30 and the mil pin 50 maintain the initial state as they are. do. And the injection molding of the cup holder 100 is completed according to the first injection process and the second injection process.

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After the first injection process and the second injection process are performed, a process for taking out the injection-molded cup holder 100 is performed. In addition, in order to take out the cup holder 100, it is preferable to rotate the flap 120 located inside the storage groove 101 in the outer direction. Here, the reason for rotating the flap 120 is to weaken the adhesive state with the mold device and to easily take out the cup holder 100.

That is, in the case of a product in which an undercut is formed in the injection molding field, it is true that the parts can be adhered to each other according to the injection and curing process of the molten resin, so it is true that it was not easy to separate them apart from each other. It was difficult to take out the injection molded product from. Therefore, the present invention is to solve this problem by rotating the flap 120 to separate the mold device and the injection molded cup holder from each other.

Rotation of the flap 120 is made by interlocking of the sliding core 30 and the mil pin 50. That is, when the first and second injection processes described above are completed, a driving force for raising the mil pin 50 is generated, and at the same time, the driving force is transmitted to the driving bracket 40 to move the sliding core 30 in the horizontal direction. do. Accordingly, the sliding core 30 is horizontally moved in a direction away from the flap 120 by the driving force of the drive bracket 40 as shown in FIG. 4(c), and at the same time, the milpin 50 rises while the flap 120 Is primarily rotated in the outer direction (ie, the space where the sliding core was located) of the storage groove 101 based on the connecting shaft A.

On the other hand, it can be seen that the driving bracket 40 for horizontally moving the sliding core 30 is gradually moving out of the through-hole 31 of the sliding core 30 while horizontally moving the sliding core 30. This is because the drive bracket 40 cannot be horizontally moved by a structure located around the drive bracket 40. Therefore, the through hole 31 is formed to be inclined in the sliding core 30, and the extension portion 41 of the drive bracket 40 is fitted in a shape corresponding to the through hole 31, so that the drive bracket 40 is inserted. When extending along the inclined through-hole 31, the extension portion 41 is to provide an effect of pushing the sliding core 30.

And as shown in Figure 4 (c) of the above, when the flap 120 is started to be positioned outside the receiving groove 101 by the primary rotation of the flap 120, Figure 4 (d) The upper mold 22 is moved upward as shown in the figure, and at this time, the mil pin 50 is continuously moved upward, so that the flap 120 is completely positioned on the outside of the storage groove 101 to be completely positioned. Order. Since the undercut can be eliminated by the rotational operation of the flap 120, it is possible to easily take out the injection molded cup holder as shown in FIG. 4(e).

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As described above, it can be seen that the manufacturing cost can be reduced by minimizing the number of parts since the cup holder 100 in which the flap 120 is integrally formed on the holder body 110 is molded. In addition, it is also possible to easily take out the cup holder 100 molded in the mold apparatus by rotating the flap 120 after the injection process.

Meanwhile, in the present invention, an elastic adjustment part (not shown) that provides elasticity to the outer circumferential surface of the holder body 110 and the rear surface of the flap 120 to limit the rotation angle of the flap 120, for example, a rubber ring is installed. It might be.

As described above, it is described with reference to the illustrated embodiment of the present invention, but these are merely exemplary, and those skilled in the art to which the present invention pertains may vary without departing from the spirit and scope of the present invention. It will be apparent that variations, modifications and other equivalent embodiments are possible. Therefore, the true technical protection scope of the present invention should be defined by the technical spirit of the appended claims.

100: cup holder 101: storage groove
110: holder body 120: flap
121: opening 122: flap rubber portion
30: sliding core 40: drive bracket
41: Extension 50: Milpin

Claims (4)

The upper mold 22 and the lower mold 24 are assembled in a state in which polypropylene (PP) molten resin is injected to at least one storage groove 101 opened upward and a cup accommodated in the storage groove 101 A first injection molding step of forming a holder body 110 in which a plurality of flaps 120 are integrally rotated according to the diameter of the body and positioned at the opening 121 formed on the side surface of the receiving groove 101;
A second injection molding step of molding the flap rubber part 122 by injecting rubber into the flap 120;
A first flap rotation step of rotating the flap 120 in the outward direction of the receiving groove 101 for taking out the cup holder 100 injection-molded by the second injection molding step;
A second flap rotation step of further rotating the flap 120 so as to be completely positioned outside the receiving groove 101 while moving the upper mold 22 upward; And
Method for manufacturing a cup holder comprising the step of taking out the injection-molded cup holder (100).
According to claim 1,
The first injection molding step,
Cup holder manufacturing method is performed in a state in which the sliding core (30) located on the side of the holder body (110) is moved to the inside of the storage groove (101). delete According to claim 1,
Method of manufacturing a cup holder further comprising the step of installing an elastic member to limit the rotation angle of the flap 120 on the back of the holder body 110 and the flap 120 of the taken out cup holder 100.

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