KR102201957B1 - Door trim and its molding machine and its molding method - Google Patents

Abstract

The present invention relates to a door trim and a molding apparatus and molding method thereof. According to the present invention, the molding apparatus comprises a molding and a first and second moldings arranged on both sides of the molding to be faced to form a first resin cavity and a second resin cavity and closed. The molding includes a body in which the first resin cavity and the second resin cavity are formed and a protruding part protruding from the body toward the second mold, and the second mold includes internal and external protrusions protruding toward the first mold, wherein the internal and external protrusions come in contact with the body which surrounds both sides of the protruding part. The molding has a first resin inflow groove and a second resin inflow groove formed through both sides of the body, and the body forms the first resin cavity and the second resin cavity between the first mold and the second mold together with the first resin inflow groove and the second resin inflow groove. Accordingly, different types of resins are simultaneously injected into both sides of the molding inserted into the mold as a boundary, and thus the molding and the different types of resins are molded in an integrated product.

Description

Door trim and its molding machine and its molding method

The present invention relates to a door trim, a molding apparatus and a molding method thereof, and in particular, to a door trim and a door trim molding apparatus and a molding method in which a different resin is injected and cured in a state in which the molding is inserted to form an integral product.

In general, a speaker mounted on a door trim of a vehicle is exposed to the outside due to the nature of generating sound, and thus the front is protected by a separate component called a speaker grill.

On the other hand, in the door trim, a molding, which is a separate injection product, may be disposed as a design element at the boundary of a portion where functions are divided, such as the speaker grill.

In general, when the molding is plated and assembled to the door trim, the process of producing the door trim is not simple because the screw must be fastened or fused together.

On the other hand, when the color of the inside of the border and the color of the outside of the door trim are different, in order to realize the color, a part inside the border is separately manufactured and assembled, or after injection molding the inside and outside in one color, the inside or outside This method also did not make the door trim production process simple.

On the other hand, the technology of molding an instrument panel of a vehicle using a resin blocking unit that blocks the mixing of different resins is Korean Patent Publication No. 10-1260850 ('The method of molding an instrument panel and a resin blocking unit for manufacturing an instrument panel used therein' ) (Hereinafter, Patent Document 1).

The upper surface of the resin blocking unit for blocking mixing of different types of resins of Patent Document 1 overlaps the upper mold.

However, since the upper surface of the resin blocking unit and the rear surface of the upper mold are only in contact with each other, the resin is transferred to the resin blocking unit by injection pressure when different resins are injected into both sides of the upper surface of the resin blocking unit. While flowing into the gap between the upper molds, different types of resins may be mixed with each other to produce a defective product.

In addition, the product manufactured in this way has a very close gap between different types of resins.At this time, the resin blocking unit is disposed so as to enter the inner side of the gap so that it is difficult to be exposed to the outside by being covered by the different types of resins, so it cannot serve as a garnish.

As a technique similar to Patent Document 1, there is Korean Patent Registration No. 10-1305707 (Patent Document 2).

In this patent document 2, the gap between different types of resins is also very close, and at this time, the resin blocking unit is disposed so as to enter the inner side of the gap, so that it is difficult to be exposed to the outside by being covered by the different types of resin, so it cannot serve as a garnish.

In the prior art of Patent Document 2, the resin blocking unit is in contact with the protrusions and parts of the adjacent mold, but all other parts are separated from the neighboring mold, so mixing may occur between different types of resins during molding. .

Another technology similar to Patent Document 1 is Korean Patent Registration No. 10-1709181 (Patent Document 3).

Patent Document 3 also has the same problem as Patent Document 1.

In order to use the resin blocking unit as a boundary between different resins as in the prior art, it is important to insert the molding into the mold and design the mold to overlap the resin blocking unit to maintain airtightness between the mold and the resin blocking unit.

However, even when overlapping as described above, the resin may overflow depending on the product size (distribution) of the resin blocking unit, and damage may be caused to the resin blocking unit depending on the amount of overlap.

Korean Registered Patent Publication No. 10-1260850 (2013.04.29) Korean Patent Registration No. 10-1305707 (2013.09.02) Korean Patent Registration No. 10-1709181 (2017.02.16)

The present invention is to solve the above-described problem, and it is an object of the present invention to provide a door trim molding apparatus that prevents resin overflow by maintaining close contact between a mold and a molding during injection molding.

In addition, it is an object of the present invention to provide an integrated door trim by bonding molding inserted into a mold and an injected different resin.

In addition, an object of the present invention is to provide a door trim molding apparatus and a door trim molding method in which resin is prevented from overflowing into other cavities by molding.

In addition, it is an object of the present invention to provide a door trim and door trim molding apparatus and a door trim molding method with improved adhesion between different resins and moldings.

In addition, it is an object of the present invention to provide a door trim molding apparatus and a door trim molding method that are easy to fix and support in place when a molding is supported on a mold.

In addition, it is an object of the present invention to provide a door trim forming apparatus and a door trim forming method in which the strength of the molding is reinforced.

Door trim molding apparatus of the present invention for achieving the above object, molding; And a first mold and a second mold that are disposed to face each other to form a first resin cavity and a second resin cavity on both sides of the molding and are molded and closed, wherein the molding comprises the first resin cavity and the second resin on both sides. A body in which a cavity is formed, and a protrusion protruding from the body toward the second mold, and the second mold includes an inner protrusion and an outer protrusion protruding toward the first mold, wherein the inner protrusion and the outer protrusion are Each side of the protrusion is in contact with the body while surrounding both sides of the protrusion, and a first resin inflow groove and a second resin inflow groove are formed in the molding through both sides of the body, wherein the body includes the first resin inflow groove and the The first resin cavity and the second resin cavity are formed between the first mold and the second mold together with the second resin inflow groove.

Further, in the door trim molding apparatus of the present invention, one surface between the inner protrusion and the outer protrusion among one surface of the second mold is in contact with the protrusion.

In addition, in the door trim molding apparatus of the present invention, the inner surface of the inner protrusion also forms a part of the first resin cavity, and the outer surface of the outer protrusion also forms a part of the second resin cavity.

Another door trim of the present invention includes: a molding including a body and a protrusion protruding from the body and having an exposed surface; A first resin and a second resin adhered to both sides of the body of the molding; And a first resin inflow groove and a second resin inflow groove formed through both sides of the body of the molding.

In another door trim of the present invention, the exposed surface is at least parallel to the exposed surface of the first resin and the exposed surface of the second resin, or protrudes from the exposed surfaces.

In another door trim of the present invention, the molding has a floating shape, the first resin is adhered to the inside of the molding, and the second resin is adhered to the outside of the molding.

In another door trim of the present invention, in the molding, both sides of the body are formed in a plurality of layers, and the first resin inflow groove and the second resin inflow groove are formed in the layer.

In another aspect of the present invention, a method for forming a door trim includes the steps of placing moldings between a first mold and a second mold disposed to face each other; Forming a first resin cavity and a second resin cavity on both sides of the molding by mold closing the first mold and the second mold; Including; wherein the first resin and the second resin are injected into the first resin cavity and the second resin cavity, respectively, and then cured and adhered to both sides of the molding; wherein the step of forming the cavity comprises: in the second mold, the The inner protrusion and the outer protrusion protruding toward the first mold side surround both sides of the protrusion protruding toward the second mold from the body of the molding while being spaced apart from each other and overlap the body, and the step of forming the cavity includes the body of the molding This is a step of forming the first resin cavity and the second resin cavity together with the first mold and the second mold by forming the first resin inflow groove and the second resin inflow groove through both sides of the.

The present invention has the following effects.

In the present invention, since the pressure of the resin introduced into the resin inflow groove during injection molding pushes the molding toward the second mold, close contact between the protrusion and the molding, that is, the overlap can be maintained. Thus, the different resins are prevented from overflowing into other cavities. In addition, bonding rigidity between the molding and the resin is secured.

In addition, in the present invention, since both sides of the body of the molding are in close contact with the protrusions of the second mold and the protrusions of the molding are in close contact with the second mold, dissimilar resins are prevented from overflowing into other cavities.

In addition, the present invention injects the first resin and the second resin respectively on both sides of the mold inserted into the mold, and simultaneously injects the different resins to form the door trim, so the molding process is reduced to increase the production efficiency and reduce the cost. do.

In addition, according to the present invention, the manufacturing process of the door trim is reduced by integrating the molding with the heterogeneous resin injected at the same time, thereby increasing production efficiency, reducing cost, and reducing noise while driving (BSR).

In addition, the present invention ensures adhesion between the resin and the multi-stage formed on both sides of the molding.

In addition, in the present invention, when a rib formed in a molding is used, it is easy to fix and support it in place when supporting it in a mold, and the strength of the molding is reinforced.

1 is a front view of a door trim according to a preferred embodiment of the present invention
2 is an enlarged view of the main part of FIG. 1
3 is a view for showing that a resin inflow groove is shown in a part of the molding
4 is a cross-sectional view of the door trim and a mold for forming the door trim shown in FIG. 1
5 is an enlarged view of a main part of FIG. 3
6 is a cross-sectional view sequentially showing a process of forming a door trim according to the present invention
7 is a cross-sectional view of a molding mold forming a molding
8 is a cross-sectional view showing a state in which molding is injection-molded through the molding mold of FIG. 7
Fig. 9 is a flow chart explaining what is shown in Fig. 5

Among the configurations of the present invention to be described below, the above-described conventional technology will be referred to for the same configuration as the prior art, and a separate detailed description will be omitted.

The terminology used herein is only for referring to specific embodiments and is not intended to limit the present invention. Singular forms as used herein also include plural forms unless the phrases clearly indicate the opposite. The meaning of "comprising" as used in the specification specifies a specific characteristic, region, integer, step, action, element and/or component, and other specific characteristic, region, integer, step, action, element, component and/or group It does not exclude the existence or addition of

When a component is referred to as being "connected" or "contacted" with another component, it is understood that it may be directly connected or in contact with the other component, but other components may exist in the middle. Should be.

In the present invention, in the state in which the molding 300, which is a separate injection product, is inserted into the molds 100 and 200, different types of resins 10 and 20 are simultaneously injected into separate cavities S1 and S2 It is an invention related to molding the resins (10, 20) into an integral product.

1 is a front view of a door trim according to a preferred embodiment of the present invention, FIG. 2 is an enlarged view of a main part of FIG. 1, and FIG. 3 is a view for showing that resin inflow grooves 350 and 360 are shown in a part of the molding. 4 is a cross-sectional view of the door trim and the molds 100 and 200 for forming the door trim shown in FIG. 1, FIG. 5 is an enlarged view of the main part of FIG. 3, and FIG. 6 is a process of forming the door trim of the present invention. It is a cross-sectional view sequentially shown, and FIG. 7 is a cross-sectional view of molding molds 410 and 420 for molding, and FIG. 8 is a cross-sectional view showing a state in which molding is injection-molded through the molding molds 410 and 420 of FIG. 7.

Hereinafter, a door trim forming apparatus and a door trim will be described based on the drawings.

Door trim molding apparatus according to a preferred embodiment of the present invention,

A molding 300 to which the first resin 10 and the second resin 20 may be adhered to both sides; A first mold 100 having a groove 110 into which the rib 310 of the molding 300 is inserted; A first resin cavity (S1) and a second resin cavity (S2) on both sides of the molding 300, that is, on both sides of the molding 300 by being mold-closed with the first mold 100 disposed opposite to each other. A second mold 200 to form a; Two nozzles separately provided in the molds 100 and 200; Including, the molding 300 includes a body 320 in which the first and second resin cavities S1 and S2 are disposed on both sides, The body 320 includes a protrusion 330 protruding toward the second mold 200, and the second mold 200 includes an inner protrusion 211 and an outer protrusion protruding toward the first mold 100 Including 213, the inner protrusion 211 and the outer protrusion 213 are in contact with the body 320 facing each other while surrounding both sides of the protrusion 330.

In the molding 300, a first resin inflow groove 360 and a second resin inflow groove 350 are formed through each of both sides of the body 320, and the body 320 has the first resin inflow groove ( 360) and the first resin cavity and the second resin cavity are formed between the first mold 100 and the second mold 200 molded and closed together with the second resin inlet groove 350.

At this time, one surface 220 disposed between the inner protrusion 211 and the outer protrusion 213 among one surface of the second mold 200 is in contact with the other surface of the protrusion 330. At this time, as shown in detail in FIG. 4, the protrusions 211 and 213 overlap the body 320 (OL). Therefore, both the first mold 100 and the second mold 200 help to maintain the position of the molding 300. For this reason, it is easy to fix and support the molding 300 during product manufacturing, so the quality of the manufactured product is good.

Accordingly, in the present invention, by integrating the molding 300 with the heterogeneous resins 10 and 20, a separate process (assembly, painting, etc.) required in the prior art becomes unnecessary, so that the production efficiency of the product is improved, and the product Production cost is reduced. In addition, since the molding 300 is integrated with the speaker grill 10 and the trim panel 20, noise (BSR) during vehicle driving is also reduced.

In this specification, the inner protrusion 211 and the outer protrusion 213 may be referred to as inner and outer protrusions 211 and 213 or protrusions 211 and 213.

On the other hand, two nozzles (not shown) can inject two kinds of colors or two kinds of resin at the same time. Therefore, it is possible to implement a product having a different color and type of the inner resin and the outer resin based on the molding 300 by using the door trim molding apparatus.

Meanwhile, the first mold 100 and the second mold 200 are disposed on one side and the other side to face each other.

On the other hand, the door trim of the present invention manufactured by the door trim molding apparatus,

A molding 300 including a body 320 and a protrusion 330 protruding from the body 320 and having exposed surfaces 311a and 311b; First and second resins 10 and 20 adhered to both sides of the body 320 of the molding 300, respectively; The first resin inlet groove 360 and the second resin inlet groove 350 formed through both sides of the body 320 of the molding 300; including, but exposed surfaces 311a, 311b of the molding 300 ) Protrudes from the exposed surface of the first resin 10 and the exposed surface of the second resin 20, or is disposed in parallel with the exposed surfaces of the first and second resins 10 and 20.

The exposed surface of the first resin 10 and the exposed surface of the second resin 20 refer to a surface in which the resins 10 and 20 are in contact with the second mold 200 in FIG. 5.

Since the molding 300 protrudes from or parallel to the exposed surface of the trim panel 20 and speaker grill 10 disposed on both sides, the molding 300 may be exposed to the outside. Accordingly, the molding 300 serves as a garnish of the product as well as a function of simultaneously molding the trim panel 20 and the speaker grill 10 integrally.

In addition, in the present invention, the pressure of the resins 10 and 20 introduced into the first resin inflow groove 360 and the second resin inflow groove 350 pushes the molding 300 toward the second mold 200 during injection molding. Therefore, it is possible to maintain close contact between the protrusions 211 and 213 and the molding 300, that is, the overlap OL.

Meanwhile, the molding 300 has a convex shape. That is, both the protrusion 330, the body 320, and the rib 310 have a prominent shape.

At this time, the inside of the molding 300 is bonded while surrounding the first resin 10, and the outside of the molding 300 is bonded while being surrounded by the second resin 20.

In this embodiment, the speaker grill 10 is formed by the first resin 10 and the trim panel 20 is formed by the second resin 20.

Accordingly, the trim panel 20, the molding 300, and the speaker grill 10 are integrated. In addition, the molding 300 has a shape surrounding the speaker grill 10.

On the other hand, the body 320 is formed of a plurality of layers (321,322) on both sides to which the first and second resins (10, 20) are adhered, the first resin inflow groove 360 and the second resin inflow groove 350 This is formed on the plurality of layers 321 and 322. Therefore, adhesion between the speaker grill 10 and the trim panel 20 and the molding 300 is good.

The molding 300 has an approximately triangular cross section as shown in FIGS. 1 and 2 when viewed from the front or the back of the product.

In the present invention, by simultaneously injecting different resins with the molding 300 as a boundary, the inner and outer sides are molded with different colored resins or different types of resins.

On the other hand, when viewing the cross section of the molding 300 as shown in FIGS. 3 and 4, the protrusion 330 is made of inclined surfaces 331a and 331b on both sides so that the center of the upper surface protrudes convexly.

At this time, the inclined surfaces 331a and 331b correspond to the exposed surfaces.

In addition, the body 320 of the molding 300 is formed such that the inner side and the outer side have two stages. Specifically, the first layer 321 which is connected to the lower side of the protrusion 330 and extends laterally than the protrusion 330, the first layer 321 is connected to the lower side of the first layer 321 and extends laterally than the first layer 321. It includes a second layer 322. That is, the inner and outer width of the second layer 322 is greater than the width of the first layer 321, and the width of the first layer 321 is greater than the width of the protrusion 330.

The protrusion 330 of the molding 300 has a shape protruding upward from the center of the body 320.

On the other hand, specifically, the first layer 321 includes other surfaces on both sides to which the resins 10 and 20 are adhered, a side surface connected to the other surface, and one surface to which the side surface and the rib 310 are connected.

As shown in FIGS. 3 to 6 and 8, the resin inflow grooves 350 and 360 formed in the first layer 321 are formed one by one on both sides of the molding 300 based on the rib 310.

Specifically, the resin inflow grooves 350 and 360 are formed to penetrate the other surface and one surface of the first layer 321.

The resin inlet groove is connected to the first inlet groove (351, 361) extending in the direction of the other side through the other surface, and is connected to the first inlet groove (351, 361) in the direction of the rib 310, that is, inward or It includes secondary inlet grooves (352, 362) extending outwardly and formed through the one surface.

Further, the widths of the secondary inflow grooves 352 and 362 are larger than the widths of the primary inflow grooves 351 and 361. Specifically, the sum of the widths of the secondary inflow grooves 352 and 362 respectively formed on both sides is greater than half of the width of the first layer 321. Since the area of the resin inflow grooves (350,360) is sufficiently large, the pressure of the resin (10,20) introduced into the resin inflow grooves (350,360) during injection makes close contact between the protrusions (211,213) and the molding (300), that is, overlap (OL) Can be maintained.

Meanwhile, the secondary inflow grooves 352 and 362 are formed so as not to be parallel with the primary inflow grooves 351 and 361. Accordingly, when the resins 10 and 20 flow into the resin inflow grooves 350 and 360 and are cured, the bonding stiffness between the resins 10 and 20 and the molding 300 is improved.

If there is only the first inflow grooves 351 and 361, the resins 10 and 20 and the molding 300 may be separated because there is no part that interlocks when a force is applied to one side or the other side. However, in the present invention, since there are secondary inflow grooves (352, 362), there is a portion between the resin (10, 20) and the molding (300), so even if a force is applied to one or the other side of the resin (10, 20) and the molding (300) Cannot be separated from each other.

On the other hand, a plurality of resin inflow grooves 350 and 360 of the present embodiment are formed to be spaced apart at predetermined intervals over the entire molding 300.

As shown in FIG. 3, the cross-sectional shape of the resin inflow grooves 350 and 360 is rectangular.

In addition, as shown in FIG. 3, on one side of the molding 300, the secondary inflow grooves 352 and 362 and the resins 10 and 20 introduced into the secondary inflow grooves 352 and 362 are exposed.

On the other hand, one side of the resin inflow grooves 350 and 360, that is, the primary inflow grooves 351 and 361, are not exposed to the user or the vehicle because it is covered with the resin 10 and 20.

The resins 10 and 20 flowing into one side of the molding 300 through the resin inflow grooves 350 and 360 push the molding 300 toward the second mold 200. Accordingly, the overlap OL between the protrusions 211 and 213 and the molding 300 can be well maintained by the pressure of the introduced resins 10 and 20.

Both the first resin 10 and the second resin 20 molded in this way include the first inlet portions 11 and 21 and the second inlet portions introduced into the resin inlet grooves 350 and 360.

The primary inlet portions 11 and 21 are located in the primary inlet grooves 351 and 361, and the secondary inlet portion is positioned in the secondary inlet grooves 352 and 362.

As shown in Figure 8, the cross-sectional shape of the primary inlet (11, 21) and the cross-sectional shape of the primary inlet groove (351, 361) are the same, and the cross-sectional shape of the secondary inlet portion and the secondary inlet groove (352, 362) The cross-sectional shapes are also the same.

Meanwhile, in FIG. 7, some of the molding molds 410 and 420 for injection molding the molding 300 described above are shown.

7 is a view for explaining a portion forming the resin inflow groove (350, 360).

As shown in FIG. 7, the molding molds 410 and 420 include a first molding mold 410 and a second molding mold 420 that form a molding cavity S3 in the shape of a molding 300 by being molded to each other.

The first molding mold 410 has a shape corresponding to one surface of the molding 300 and the resin inflow grooves 350 and 360.

The second molding mold 420 has a shape corresponding to the other surface and both side surfaces of the molding 300.

As shown in FIG. 7, groove forming portions 411a and 411b having a shape corresponding to the resin inflow grooves 350 and 360 of the molding 300 are protruded at one point on the other side of the first molding mold 410.

A plurality of groove forming portions 411a and 411b are formed in the first molding mold 410 at a predetermined interval.

For this reason, when the molding 300 is molded using the molding molds 410 and 420, the resins 10 and 20 are not filled in the positions of the groove forming parts 411a and 411b, so that a plurality of resins flow into the molding 300. The grooves 350 and 360 may be formed.

On the other hand, the rib 310 of the molding 300 of the present embodiment is connected to the lower surface of the body 320, and is arranged to be biased from the center to the outside.

When viewing the side surfaces of the ribs 310 as shown in FIGS. 3 and 4, the cross section of the ribs 310 is a rectangle whose vertical length is longer than the width.

The rib 310 reinforces the rigidity of the molding 300.

The rib 310 serves to fix and support the molding 300 by inserting it into the molds 100 and 200.

Meanwhile, the molding 300 may serve as a variety of garnishes through various colors, metallic resins, painting, and plating.

Meanwhile, the protrusions 211 and 213 including the inner protrusion 211 and the outer protrusion 213 of the second mold 200 protrude from one surface of the second mold 200 to the first mold 100 side, that is, the other side. Is formed.

As described above, since the protrusions 211 and 213 must surround both sides of the protrusion 330, that is, the protrusion 330 is formed in a convex shape, the protrusions 211 and 213 are also formed in a convex shape.

3 and 4, the protrusions 211 and 213 have a cross-section close to a rectangle when viewed from the side.

The upper and lower lengths of the protrusions 211 and 213 are longer than the width.

The protrusions 211 and 213 include an inner protrusion 211 and an outer protrusion 213 respectively surrounding the inner and outer sides of the molding 300.

The shapes of the inner protrusion 211 and the outer protrusion 213 are the same, but the dimensions may be different from each other.

On the other hand, as shown in FIGS. 3 and 4, when molded and closed, the inner protrusion 211 and the outer protrusion 213 are spaced apart from the protrusion 330 by a predetermined interval. More specifically, the outer side of the inner protrusion 211 is adjacent to the protrusion 330 of the molding 300.

In addition, during mold closing, the inner side of the outer protrusion 213 is adjacent to the protrusion 330 of the molding 300.

Therefore, it is preferable that a space G is formed between the protrusion 300 and the protrusions 211 and 213. Therefore, the width between the inner protrusion 211 and the outer protrusion 213 is greater than the width of the protrusion 330. Accordingly, during mold closing, the protrusions 211 and 213 may contact the body 320 without scratching the protrusion 330 of the molding 300.

At this time, as shown in detail in FIG. 4, the protrusions 211 and 213 overlap the body 320 (OL). Therefore, the molding 300 in which the protrusions 211 and 213 press both sides of the upper portion can be well supported without shaking.

Due to the overlap OL, the protrusions 211 and 213 press a part of the body 320 when the mold is closed, so that the protrusions 211 and 213 and the body 320 of the second mold 200 are in close contact with each other to form a heterogeneous resin (10, 20). It is to prevent mixing between the liver and overflow of the resins (10, 20).

At this time, the inner surface of the inner protrusion 211 also forms a part of the first resin cavity S1, and the outer surface of the outer protrusion 213 also forms a part of the second resin cavity S2.

Meanwhile, the second mold 200 is formed to open the other side by being surrounded by an outer surface of the inner protrusion, an inner surface of the outer protrusion, and a part of one surface 220 of the second mold 200, and the protrusion 330 is inserted and accommodated. The receiving portion 221 is formed.

A part of one surface 220 of the second mold 200 is a portion located between the inner protrusion 211 and the outer protrusion 213 among one surface of the second mold 200.

It is preferable that the shape of a part of one surface 220 of the second mold 200 is a shape corresponding to the other surface of the protrusion 330.

Meanwhile, when the mold is closed, the other side of the molding 300 is in close contact with the second mold 200, and the rib 310 is inserted and one side of the molding 300 is in close contact with the first mold 100.

In more detail, as shown in detail in FIG. 4, one surface of the protrusions 211 and 213 is in contact with the other surface of the body 320 of the molding 300, and the other surface of the protrusion 330 accommodated in the receiving part 221 is a second mold ( It is in contact with one side 220 of a part of 200). Therefore, since the second mold 200 is in close contact with the other side of the body 320 and the protrusion 330 while surrounding both sides of the protrusion 330, the position of the molding 300 is well fixed and supported.

In this case, as shown in FIG. 4, one surface of the protrusions 211 and 213 and the body 320 of the molding 300 are designed to overlap each other by a predetermined dimension OL. Accordingly, the position of the molding 300 can be better maintained, and the overflow of the resin toward the protruding portion 330 is prevented.

Meanwhile, in FIG. 4, the protrusions 330 are spaced apart from the protrusions 211 and 213 at a predetermined interval. This is to prevent damage by preventing the protrusions 211 and 213 from contacting the protrusion 330 as the first mold 100 and the second mold 200 are brought closer to each other when the mold is closed.

Even if the protrusions 330 and the protrusions 211 and 213 are spaced apart, there is no problem in the role of the molding 300 to prevent resin overflow because the protrusions 211 and 213 hold the body 320.

Meanwhile, when mold closing and injection of the first resin 10 and the second resin 20 are performed, the first resin 10 and the second resin 20 are formed in the first layer 321 as shown in detail in FIG. 4. The side and upper surfaces of the second layer 322, part of the side and upper surfaces of the second layer 322, the inner side of the inner protrusion 211, the outer side of the outer protrusion 213, and the lower surface of the first mold 100 are in contact.

For this reason, the first resin 10 and the second resin 20 cured after being injected are adhered to the side and upper surfaces of the first layer 321 and the side and upper surfaces of the second layer 322, and thus the speaker grill ( 10), the trim panel 20 and the molding 300 are integrally formed.

At this time, a portion of the first resin 10 and the second resin 20 in contact with the body 320 has a plurality of layer shapes corresponding to the first layer 321 and the second layer 322. Accordingly, the molding 300 is secured with adhesion between the molded speaker grill 10 and the trim panel 20.

Meanwhile, in the product, valleys 340a and 340b are formed in which the protrusions 211 and 213 of the second mold 200 were positioned during injection molding.

At this time, the protrusions 211 and 213 are positioned in the valleys 340a and 340b, so that the protrusions 211 and 213 are in close contact with the first resin 10, the second resin 20, and the body 320, so that the first resin 10 becomes the second resin. It is prevented from overflowing into the resin cavity (S2) or from overflowing the second resin (20) into the first resin cavity (S1). That is, the molding 300 serves to block mixing of different resins and to serve as a boundary between components.

As shown in FIG. 2, the first resin 10 and the second resin 20 are spaced apart from the protrusion 330 by the valleys 340a and 340b.

Further, the valleys 340a and 340b include an inner valley 340a in which the inner protrusion 211 is located and an outer valley 340b in which the outer protrusion 213 is located.

------------ Door trim molding method ------------

Hereinafter, a method of manufacturing a door trim using the door trim forming apparatus will be described.

For a detailed description or shape of the molding apparatus and the molding 300, refer to the above description.

In the door trim molding method according to an embodiment of the present invention, between the first mold 100 and the second mold 200 disposed opposite to each other by supporting the molding 300 on the first mold 100 Placing (S10); Forming a first resin cavity (S1) and a second resin cavity (S2) on both sides of the molding 300 by mold closing the first mold 100 and the second mold 200 (S20); The first resin (10) and the second resin (20) are injected into the first resin cavity (S1) and the second resin cavity (S2), respectively, and then cured and adhered to both sides of the molding 300 (S30). ); Including, the mold closing step (S20) of taking out the molded product from the molds 100 and 200 so that the cured first resin 10 and the second resin 20 are integrated with the molding 300 (S40). In the second mold 200, the inner protrusion 211 and the outer protrusion 213 protruding toward the first mold 100 are formed from the body 320 of the molding 300 to the second mold 200. It is a step of overlapping (OL) with the body 320 while surrounding the protruding portion 330 protruding toward the side, and the step of forming the cavity (S1, S2) (S20) includes both sides of the body 320 of the molding 300 The first resin inlet groove 360 and the second resin inlet groove 350 formed through the first mold 100 and the second mold 200 together with the first resin cavity S1 and the second resin cavity This is the step of forming (S2).

The curing step (S30) is a step in which the first resin 10 and the second resin 20 are adhered only to the body 320 of the molding 300.

Hereinafter, the molding method will be described in more detail.

First, a first mold 100 is prepared.

Thereafter, the rib 310 of the molding 300 is inserted into the groove 110 of the first mold 100, and the other surface of the body 320 of the molding 300 is brought into contact with one surface of the first mold 100. The molding 300 is fixed and supported on the first mold 100 (S10).

At this time, since the molding 300 has a convex shape, looking at the cross section as shown in FIG. 5(b), the molding 300 can be stably fixed and supported to the first mold 100 by the ribs 310 disposed close to the outside. have.

Thereafter, a first resin cavity S1 and a second resin cavity S2 are formed on both sides based on the molding 300 in contact with the molded and closed first mold 100 and the second mold 200 (S20). ).

In this step (S20), the protrusions 211 and 213 of the second mold 200 surround the protrusion 330 of the molding 300 and are in close contact with the first layer 321 of the body 320 to overlap (OL), The upper surface of the protrusion 330 is in contact with the upper surface of the receiving part 221.

In addition, in this step (S20), the resin inflow groove (350,360) communicates with the space between the first mold (100) and the second mold (200), and the molding 300 and the mold (100,200) A first resin cavity (S1) and a second resin cavity (S2) are formed.

Thereafter, the first resin 10 and the second resin 20 are simultaneously injected from each of the two nozzles separately provided in the molds 100 and 200 to flow into the first resin cavity S1 and the second resin cavity S2, respectively. , The introduced first resin 10 and the second resin 20 are cured to form both sides of the molding 300 as the speaker grill 10 and the trim panel 20 and the resin inflow grooves 350 and 360, respectively. It is adhered (S30).

In this step (S30), the first resin 10 is disposed inside the molding 300, and the second resin 20 is disposed outside the molding 300. That is, the first resin 10 is in contact with the other surface of the first mold 100, one surface of the second mold 200, and the inner side of the body 320 and the inner side of the inner protrusion 211, and the second resin 20 ) Is in contact with the other surface of the first mold 100, one surface of the second mold 200, the outside of the body 320, and the outside of the outer protrusion 213.

In addition, in this step (S30), the first resin 10 and the second resin 20 are adhered to the body 320 of the molding 300 in a plurality of layers.

In addition, in this step (S30), the first resin 10 is introduced into the first resin inlet groove 360. At this time, the first resin 10 is sequentially introduced into the first inlet groove 361 and the second inlet groove 362 of the first resin inlet groove 360, and thus the first resin inlet 11 and the second inlet portion ( 12), and the second resin 20 is sequentially introduced into the first inflow groove 351 and the second inflow groove 352 of the second resin inflow groove 350, and the first inflow part 21 and 2 It becomes the vehicle inflow part 22.

In this way, the molding is pushed toward the second mold 200 by the pressure generated as the resin sequentially flows into the primary inflow grooves 351 and 361 and the secondary inflow grooves 352 and 362 of the resin inflow grooves 350 and 360, and the protrusions 211 and 213 And the second mold 200 to maintain the overlap.

Thereafter, the molds 100 and 200 are molded to take out the speaker grill 10, the trim panel 20, and the product integrated with the molding 300 from the molds 100 and 200 (S40).

On the other hand, in the embodiment of the present invention, the resin inflow grooves 350 and 360 are formed only in the first layer 321, but if the primary inflow grooves 351 and 361 are covered by the resins 10 and 20, no matter where they are formed Okay. For example, it may be formed over the first layer 321 and the second layer 322.

Meanwhile, in FIG. 3, the cross-sectional shape of the resin inflow grooves 350 and 360 is shown as a rectangle, but this is only an example, and the cross-sectional shape may be a shape such as a circular triangle.

Meanwhile, in the present specification,'one side' refers to the lower side in FIGS. 3 to 5, and'the other side' refers to the upper side in FIGS. 3 to 5.

As described above, although it has been described with reference to a preferred embodiment of the present invention, a person of ordinary skill in the art will diversify the present invention within the scope not departing from the spirit and scope of the present invention described in the following claims. It can be changed or modified accordingly.

** Description of key symbols **
10: first resin (speaker grill) 20: second resin (trim panel)
100: first mold 110: groove
200: second mold 210: protrusion
220: part of one side of the second mold 221: receiving part
300: resin blocking member 310: rib
320: body 330: protrusion
350: first resin inflow groove 360: second resin inflow groove
410: first molding mold 411: groove forming part
420: second molding mold S1: first resin cavity
S2: second resin cavity S3: molding cavity

Claims (8)

molding;
Including; a first mold and a second mold which are disposed opposite to each other to form a first resin cavity and a second resin cavity on both sides of the molding and are molded and closed;
The molding includes a body having the first resin cavity and the second resin cavity formed on both sides, a protrusion protruding from the body toward the second mold, and a rib connected to the body and inserted into a groove formed in the first mold. Including,
The second mold includes an inner protrusion and an outer protrusion protruding toward the first mold,
The inner protrusion and the outer protrusion are in contact with the body while respectively surrounding both sides of the protrusion,
The body has a first resin inflow groove and a second resin inflow groove formed through both sides of the body,
The body is a door trim forming apparatus for forming the first resin cavity and the second resin cavity between the first mold and the second mold together with the first resin inflow groove and the second resin inflow groove The method according to claim 1,
Door trim forming apparatus in which one surface of one surface of the second mold between the inner protrusion and the outer protrusion is in contact with the protrusion The method according to claim 2,
The inner surface of the inner protrusion also forms a part of the first resin cavity,
Door trim forming apparatus for forming a part of the second resin cavity on the outer surface of the outer protrusion delete A molding including a body, a protrusion protruding upward of the body and having an exposed surface, and a rib connected to a lower surface of the body;
A first resin and a second resin adhered to both sides of the body of the molding;
Including; a first resin inflow groove and a second resin inflow groove formed through both sides of the body of the molding,
The exposed surface is at least parallel to the exposed surface of the first resin and the exposed surface of the second resin, or protrudes from the exposed surfaces, and the molding is exposed to the outside. The method of claim 5,
The molding has a floating shape,
The first resin is adhered to the inside of the molding,
Door trim to which the second resin is adhered to the outside of the molding The method of claim 5,
In the molding, both sides of the body are formed in a plurality of layers,
Door trim in which the first resin inflow groove and the second resin inflow groove are formed in the layer Placing a molding between the first mold and the second mold disposed to face each other, and inserting a rib of the molding into a groove formed in the first mold;
Forming a first resin cavity and a second resin cavity on both sides of the molding by mold closing the first mold and the second mold;
Including; wherein the first resin and the second resin are injected into the first resin cavity and the second resin cavity, respectively, and then cured and adhered to both sides of the molding; including,
In the step of forming the cavity, the inner protrusion and the outer protrusion protruding from the second mold toward the first mold are spaced apart and overlap the body while surrounding both sides of the protrusion protruding from the body of the molding toward the second mold. ego,
In the step of forming the cavity, the first resin inflow groove and the second resin inflow groove formed through both sides of the body of the molding form the first resin cavity and the second resin cavity together with the first mold and the second mold. Door trim manufacturing method

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