阅读说明：本技术 门饰板及其成型装置和成型方法 (Door trim, and molding device and molding method thereof ) 是由 洪锡焕 李时旭 于 2020-09-24 设计创作，主要内容包括：本发明涉及门饰板及其成型装置和成型方法,尤其是这种门饰板及其成型装置和成型方法包括：铸模；在铸模两侧为形成第1树脂腔及第2树脂腔相向放置且闭模的第1模具和第2模具。铸模包括两侧形成所述第1树脂腔及第2树脂腔的主体,以及从主体向第2模具侧突出的突出部。第2模具包括向第1模具侧突出的内侧突起及外侧突起。内侧突起和外侧突起分别围绕突出部的两侧与主体接触。铸模上形成贯通所述主体两侧的第1树脂流入槽和第2树脂流入槽,主体同所述第1树脂流入槽和所述第2树脂流入槽一起,在第1模具及第2模具之间形成第1树脂腔和第2树脂腔,借助所述结构,同时向嵌入模具的铸模两侧注射异种树脂,从而使铸模和异种树脂一体成型。(The invention relates to a door trim, a forming device and a forming method thereof, in particular to the door trim, the forming device and the forming method thereof, which comprise the following steps: casting a mold; on both sides of the casting mold are a 1 st mold and a 2 nd mold which are placed opposite to each other and close the 1 st resin cavity and the 2 nd resin cavity. The mold includes a main body having both sides forming the 1 st and 2 nd resin cavities, and a protrusion protruding from the main body toward the 2 nd mold side. The 2 nd mold includes an inner protrusion and an outer protrusion protruding toward the 1 st mold side. The inner protrusion and the outer protrusion are in contact with the body around both sides of the protrusion, respectively. The casting mold is provided with a 1 st resin inlet groove and a 2 nd resin inlet groove which penetrate through both sides of the main body, the main body is provided with the 1 st resin inlet groove and the 2 nd resin inlet groove, a 1 st resin cavity and a 2 nd resin cavity are formed between the 1 st die and the 2 nd die, and the casting mold and the dissimilar resin are integrally molded by injecting the dissimilar resin to both sides of the casting mold embedded in the die by the structure.)

1. A door trim forming device, characterized by comprising:

casting a mold;

a 1 st mould and a 2 nd mould which are used for forming a 1 st resin cavity and a 2 nd resin cavity which are oppositely arranged and close are arranged on two sides of the casting mould;

the casting mold includes a main body forming the 1 st and 2 nd resin cavities on both sides, and a protrusion protruding from the main body to the 2 nd mold side;

the 2 nd mold comprises an inner protrusion and an outer protrusion protruding toward the 1 st mold side;

the inner protrusion and the outer protrusion are in contact with the body around both sides of the protrusion, respectively;

the casting mold is formed with a 1 st resin inflow groove and a 2 nd resin inflow groove penetrating both sides of the main body,

the main body forms the 1 st resin cavity and the 2 nd resin cavity between the 1 st mold and the 2 nd mold together with the 1 st resin inflow groove and the 2 nd resin inflow groove.

2. A door trim molding apparatus according to claim 1, wherein:

one surface of the 2 nd mold between the inner protrusion and the outer protrusion is in contact with the protruding portion.

3. A door trim molding apparatus according to claim 2, wherein:

the inner side surface of the inner protrusion forms a part of the 1 st resin chamber,

the outer side surface of the outer protrusion also forms a part of the 2 nd resin cavity.

4. A door trim, characterized by comprising:

a mold including a body and a protrusion protruding on the body and having an exposed surface;

1 st resin and 2 nd resin respectively adhered to both sides of the mold main body;

and a 1 st resin inflow groove and a 2 nd resin inflow groove formed through both sides of the main body of the mold.

5. A door trim according to claim 4, wherein:

the exposed surface is at least parallel to the exposed surface of the 1 st resin and the exposed surface of the 2 nd resin, or protrudes further than the exposed surfaces.

6. A door trim according to claim 5, wherein;

the casting mould is in a strip shape;

the 1 st resin is adhered to the inner side of the casting mould;

the No. 2 resin is adhered to the outer side of the casting mold.

7. A door trim according to claim 5, wherein;

a plurality of layers are formed on both sides of the main body of the mold, and the 1 st resin inflow groove and the 2 nd resin inflow groove are formed in the layers.

8. A method of manufacturing a door trim, comprising:

a first stage, placing a casting mould between a 1 st mould and a 2 nd mould which are oppositely arranged;

in the second stage, closing the 1 st die and the 2 nd die, and forming a 1 st resin cavity and a 2 nd resin cavity on two sides by taking the casting die as a boundary;

in the third stage, injecting the 1 st resin and the 2 nd resin into the 1 st resin cavity and the 2 nd resin cavity respectively, and bonding the cured resin to two sides of the casting mold;

a cavity forming stage: an inner protrusion and an outer protrusion protruding from the 2 nd die toward the 1 st die surround and separate both sides of a protrusion protruding from a main body of the casting mold toward the 2 nd die, and overlap the main body,

and a cavity forming step of forming the 1 st and 2 nd resin cavities together with the 1 st and 2 nd molds by passing through the 1 st and 2 nd resin inflow grooves formed at both sides of the mold body.

Technical Field

The present invention relates to a door trim, a molding apparatus and a molding method thereof, and more particularly, to a door trim, a molding apparatus and a molding method thereof, in which a different resin is injected in a mold insert state, and is cured and molded into a single body.

Background

Speakers, which are generally mounted on a door trim of a vehicle, are exposed to the outside due to their sound-emitting characteristics, and thus are generally protected from the front by a separate member called a Speaker Grill.

On the other hand, on the door trim, a separate injection-molded article as a design element may be placed together with the speaker grille at the boundary of the function separating region.

In general, when the mold is assembled to the door trim after gold plating, a process such as bolt fastening or welding is required, and thus the production process of the door trim is not so simple.

On the other hand, if the color of the interior of the border is different from that of the exterior, in order to realize the color, it is necessary to separately manufacture and assemble the parts of the interior of the border, or to injection-mold the interior and exterior with one color and then to perform a process of a masking coating process of the interior or exterior, and the manufacturing process of the door trim using this method is not so simple.

On the other hand, a technique of molding a vehicle instrument panel by a resin dam unit for preventing mixture of different types of resins is disclosed in korean patent laid-open publication No. 10-1260850 (molding method of an instrument panel and resin dam unit for manufacturing an instrument panel) (hereinafter, referred to as patent document 1).

The resin blocking unit that blocks the mixing of dissimilar resins in patent document 1 overlaps the top surface with the upper mold.

However, since the top surface of the resin dam unit is in contact with only a flat surface of the upper mold, which is not curved, when different resins are injected to both sides of the top surface of the resin dam unit, respectively, the injection pressure may cause the resin to enter a gap between the resin dam unit and the upper mold, and different resins may be mixed with each other, thereby causing a defective product to be manufactured.

In addition, the product manufactured as described above has too close a gap between the different types of resins, and in this case, the resin blocking unit is difficult to be exposed to the outside by being blocked by the different types of resins to be placed inside the gap, and thus cannot perform a decorative function.

Korean granted patent No. 10-1305707 (patent document 2) has a similar technique to that of patent document 1.

Also in patent document 2, the gap between the different types of resins is too close, and the resin blocking unit is placed inside the gap, so that it is difficult to be blocked by the different types of resins and exposed to the outside, and thus cannot perform a decorative function.

In a technique disclosed as a prior art in patent document 2, although the resin dam unit is in contact with the protruding portion of the adjacent mold, the remaining portion is all spaced apart from the adjacent mold, and therefore, mixing between different types of resins occurs at the time of molding.

Korean granted patent No. 10-1709181 (patent document 3) has another technique similar to that of patent document 1.

Patent document 3 has the same problem as patent document 1.

In order to use the resin barrier unit as a boundary of the dissimilar resin as in the prior art, a mold is inserted into a mold, the mold is designed to overlap the resin barrier unit, and it is very important to maintain airtightness between the mold and the resin barrier unit.

However, even if the overlapping is achieved as described above, since the resin dam units differ in product size (spread), there is a possibility that the resin overflow phenomenon occurs, and the different overlapping amounts may cause damage to the resin dam units.

[ Prior Art document ]

[ patent document ]

(patent document 1) (Korean patent laid-open publication No. 10-1260850) (2013.04.29)

(patent document 2) (Korean patent laid-open publication No. 10-1305707) (2013.09.02)

(patent document 3) (Korean patent laid-open publication No. 10-1709181) (2017.02.16)

Disclosure of Invention

[ problem ] to solve

The present invention has been made to solve the above problems, and an object of the present invention is to provide a door trim molding apparatus for maintaining a mold and a mold in tight engagement to prevent resin from overflowing during injection molding.

Further, an object of the present invention is to provide an integrated door trim in which a mold embedded in a mold and an injected heterogeneous resin are bonded together.

Further, it is an object of the present invention to provide a door trim molding apparatus and a door trim molding method for preventing mold from causing seborrhea to other cavities.

Further, an object of the present invention is to provide a door trim, a door trim molding apparatus, and a door trim molding method, in which the adhesion between the dissimilar resin and the mold is improved.

Further, it is an object of the present invention to provide a door trim molding apparatus and a door trim molding method which are easily fixed and supported in place when a mold is supported on a mold.

Further, an object of the present invention is to provide a door trim molding apparatus and a door trim molding method in which the strength of a mold is enhanced.

[ MEANS FOR solving PROBLEMS ] to solve the problems

In order to achieve the object, a door trim molding apparatus according to the present invention includes: casting a mold; the casting mold includes a 1 st mold and a 2 nd mold which are placed opposite to each other to form a 1 st resin cavity and a 2 nd resin cavity and close the mold, the casting mold includes a main body of which both sides form the 1 st resin cavity and the 2 nd resin cavity, and a protrusion protruding to the 2 nd mold side on the main body, and the 2 nd mold includes an inner protrusion and an outer protrusion protruding to the 1 st mold side, the inner protrusion and the outer protrusion contacting the main body around both sides of the protrusion, respectively. The casting mold is provided with a 1 st resin inflow groove and a 2 nd resin inflow groove which penetrate through two sides of the main body, and the main body, the 1 st resin inflow groove and the 2 nd resin inflow groove form a 1 st resin cavity and a 2 nd resin cavity between a 1 st die and a 2 nd die.

In the door trim molding apparatus according to the present invention, the protrusion is in contact with one surface of the 2 nd mold, which is placed between the inner and outer protrusions.

In the door trim molding apparatus according to the present invention, an inner surface of the inner protrusion forms a part of the 1 st resin cavity, and an outer surface of the outer protrusion forms a part of the 2 nd resin cavity.

Another door trim according to the present invention includes: a mold comprising a body, and a protrusion protruding on the theme and having an exposed face; 1 st resin and 2 nd resin respectively adhered to both sides of the mold main body; a 1 st resin inflow groove and a 2 nd resin inflow groove formed through both sides of the main body of the mold.

In another door trim according to the present invention, the exposed surface is at least parallel to the exposed surface of the 1 st resin and the exposed surface of the 2 nd resin, or protrudes further than the exposed surfaces.

In another door trim according to the present invention, the mold has a belt shape, the 1 st resin is bonded to an inner side of the mold, and the 2 nd resin is bonded to an outer side of the mold.

In another door trim according to the present invention, a plurality of layers are formed on both sides of the main body of the mold, and the 1 st resin inflow groove and the 2 nd resin inflow groove are formed in the layers.

Another door trim molding method of the present invention includes: a first stage, a casting mould is placed between a 1 st mould and a 2 nd mould which are oppositely placed; in the second stage, after the 1 st die and the 2 nd die are closed, a 1 st resin cavity and a 2 nd resin cavity are formed on two sides by taking the casting die as a boundary; and a third stage of curing and bonding the 1 st resin and the 2 nd resin after injecting the 1 st resin and the 2 nd resin into the 1 st resin cavity and the 2 nd resin cavity respectively. The stage of cavity formation: an inner protrusion and an outer protrusion protruding from the 2 nd die toward the 1 st die side are spaced apart from each other, surround both sides of a protrusion protruding from a main body of the casting mold toward the 2 nd die side, and overlap the main body; and a cavity forming stage, wherein a 1 st resin inflow groove and a 2 nd resin inflow groove which are formed through two sides of the casting mold main body form a 1 st resin cavity and a 2 nd resin cavity together with the 1 st mold and the 2 nd mold.

[ Effect of the invention ]

The present invention has the following effects.

In the invention, when injection molding, the pressure generated by the resin flowing into the resin inlet groove pushes the casting mould to the 2 nd mould side, so that the protrusion part and the casting mould are tightly combined, namely, the overlapping can be kept. Thereby preventing the heterogeneous resin from overflowing to other cavities. In addition, the bonding strength between the mold and the resin can be ensured.

In addition, in the present invention, both sides of the main body of the mold are tightly coupled with the protrusion of the 2 nd mold, and the protrusion of the mold is tightly coupled with the 2 nd mold, so that the heterogeneous resin can be prevented from overflowing to other cavities.

In addition, the invention takes the casting mould of the embedded mould as the boundary, inject the 1 st resin and 2 nd resin separately on both sides, because the dissimilar resin is injected to form the door trim at the same time, so has reduced the forming process, has raised the production efficiency, has saved the cost.

In addition, the invention integrates the casting mould and the heterogeneous resin injected at the same time, thereby reducing the manufacturing process of the door decorative plate, improving the production efficiency, saving the cost and simultaneously reducing the noise (BSR) in driving.

In addition, the present invention ensures the adhesion between the resin and the segments formed on both sides of the mold.

In addition, the invention utilizes the rib formed in the casting mould, when supporting the mould, the rib is easy to be fixed and supported in place, and the strength of the casting mould is enhanced.

Drawings

FIG. 1 is a front view of a door trim panel according to a preferred embodiment of the present invention

FIG. 2 is an enlarged view of a main portion of FIG. 1

FIG. 3 is a view for showing a resin inflow groove shown on a part of a mold

FIG. 4 is a sectional view of the door trim and a mold for molding the door trim shown in FIG. 1

FIG. 5 is an enlarged view of a main portion of FIG. 3

FIG. 6 is a sectional view showing a process of molding a door trim of the present invention

FIG. 7 is a sectional view of a mold die for molding a mold

Fig. 8 is a sectional view showing an injection molding die by the die mold of fig. 7

FIG. 9 is a flowchart illustrating the situation shown in FIG. 5

Detailed Description

Among the components of the present invention to be described below, the same components as those of the prior art will be referred to the prior art described above, and detailed description thereof will be omitted.

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 herein, the singular forms "a", "an" and "the" include plural referents unless the context clearly dictates otherwise. The term "comprising" as used in the specification is intended to specify the presence of stated features, regions, integers, steps, acts, elements, and/or components, but does not exclude the presence or addition of other specified features, regions, integers, steps, acts, elements, components, and/or groups thereof.

When a structural element is referred to as being "connected" or "contacting" another structural element, it can be directly connected or contacting the structural element, but it can be understood that other structural elements may be present therebetween.

The present invention is an invention for integrally molding a mold 300 and dissimilar resins 10 and 20 by simultaneously injecting the dissimilar resins 10 and 20 into cavities S1 and S2, which are independently divided, in a state where the mold 300, which is injected separately, is fitted into molds 100 and 200.

Fig. 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 portion of fig. 1, fig. 3 is a view showing a resin inflow groove 350, 360 shown on a portion of a mold, fig. 4 is a sectional view of the door trim and a mold 100, 200 for molding the door trim shown in fig. 1, fig. 5 is an enlarged view of a main portion of fig. 3, fig. 6 is a sectional view showing a molding process of the door trim of the present invention, fig. 7 is a sectional view of a mold 410, 420 for molding the mold, and fig. 8 is a sectional view showing an injection-molded mold through the mold 410, 420 of fig. 7.

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

First, a preferred embodiment of the present invention relates to a door trim molding apparatus including: a mold 300 to both sides of which a 1 st resin 10 and a 2 nd resin 20 are respectively bonded; 1 st die 100 forming a groove 110 into which a rib 310 of the casting die 300 is inserted; and a 2 nd mold 200 which contacts the casting mold 300 after closing the 1 st mold 100 placed in opposition and forms a 1 st resin cavity S1 and a 2 nd resin cavity S2 on both sides, i.e., inside and outside, of the casting mold 300; 2 nozzles mounted on the molds 100, 200, respectively. The casting mold 300 includes a main body 320 having the 1 st and 2 nd resin cavities S1 and S2 disposed at both sides thereof, and a protrusion 330 protruding toward the 2 nd mold 200 side on the main body 320, and the 2 nd mold 200 includes an inner protrusion 211 and an outer protrusion 213 protruding toward the 1 st mold 100 side, and the inner protrusion 211 and the outer protrusion 213 surround both sides of the protrusion 330, respectively, and contact the main body 320 facing thereto.

In the casting mold 300, a 1 st resin inlet groove 360 and a 2 nd resin inlet groove 350 are formed through both sides of the body 320, and the body 320 forms the 1 st resin cavity and the 2 nd resin cavity between the 1 st die 100 and the 2 nd die 200 that are closed together with the 1 st resin inlet groove 360 and the 2 nd resin inlet groove 350.

At this time, one surface 220 of the 2 nd mold 200, which is placed between the inner and outer protrusions 211 and 213, is in contact with the other surface of the protrusion 330. At this time, as specifically shown in fig. 4, the protruding portions 211,213 Overlap (OL) with the main body 320. The 1 st die 100 and the 2 nd die 200 all help maintain the position of the casting mold 300. Therefore, the fixing and supporting of the mold 300 are easy when manufacturing the product, and the quality of the manufactured product is good.

Therefore, the present invention integrates the mold 300 with the dissimilar resins 10 and 20 without a separate process (assembly, coating, etc.) required in the prior art, thereby improving the production efficiency of the product and reducing the production cost of the product. In addition, since the mold 300 is integrated with the speaker grill 10 and the trim panel 20, noise (BSR) during vehicle driving can be reduced.

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

On the other hand, 2 nozzles (not shown) can simultaneously emit 2 colors or 2 resins. Therefore, the door trim molding apparatus can realize a product having a different color of the inner resin and a different color and type of the outer resin with the mold 300 as a boundary.

On the other hand, the 1 st mold 100 and the 2 nd mold 200 are placed on one side and the other side, respectively, to be placed opposite to each other.

On the other hand, a door trim manufactured by the door trim molding apparatus,

a mold 300 including a body 320, a protrusion 330 protruding from the body 320 and having exposed surfaces 311a, 311 b; the 1 st resin 10 and the 2 nd resin 20 respectively adhered to both sides of the body 320 of the mold 300 penetrate the 1 st resin inflow groove 360 and the 2 nd resin inflow groove 350 formed at both sides of the body 320 of the mold 300, but when the exposed surfaces 311a and 311b of the mold 300 are provided, the exposed surfaces of the 1 st resin 10 and the 2 nd resin 20 are protruded more than or parallel to the exposed surfaces of the 1 st resin 10 and the 2 nd resin 20.

The exposed surface of the 1 st resin 10 and the exposed surface of the 2 nd resin 20 refer to the contact surfaces of the resins 10 and 20 and the 2 nd mold 200 in fig. 5.

The mold 300 is more protruded than or parallel to the exposed surfaces of the decoration panel 20 and the speaker grill 10 placed at both sides, so the mold 300 is exposed to the outside. Therefore, the mold 300 has not only a function of simultaneously molding the decorative panel 20 and the speaker grill 10 but also a function of decorating a product.

In addition, in the injection molding of the present invention, since the mold 300 is pushed toward the 2 nd mold 200 side by the pressure of the resins 10, 20 flowing into the 1 st resin inflow groove 360 and the 2 nd resin inflow groove 350, the protrusions 211,213 and the mold 300 are closely combined, and thus the Overlap (OL) can be maintained.

On the other hand, the mold 300 has a band shape. That is, the protrusion 330 and the body 320 as well as the rib 310 are band-shaped.

At this time, the inner side of the mold 300 is bonded around the 1 st resin 10, and the outer side of the mold 300 is bonded around the 2 nd resin 20.

The speaker grill 10 of the present embodiment is molded by the 1 st resin 10, and the decorative panel 20 is molded by the 2 nd resin 20.

Thus, the decoration panel 20 is integrated with the mold 300 and the speaker grille 10. In addition, the mold 300 is formed in a shape surrounding the speaker grill 10.

On the other hand, the main body 320 is formed of a plurality of layers 321, 322 on both sides to which the 1 st and 2 nd resins 10, 20 are bonded, and the 1 st and 2 nd resin inflow grooves 360 and 350 are formed in the plurality of layers 321, 322. Therefore, the adhesion between the speaker grill 10 and the decoration panel 20 and the mold 300 is good.

The mold 300 has a cross section that looks like a triangle when viewed from the front or back of the product, as shown in fig. 1 and 2.

The present invention is to simultaneously inject different kinds of resins with a mold 300 as a boundary, and to mold the inside and the outside with different colors of resins or different kinds of resins.

On the other hand, when the cross section of the mold 300 is observed, inclined surfaces 331a and 331 are formed on both sides of the protrusion 330 so that the center of the top surface is protruded, as shown in fig. 3 and 4.

In this case, the inclined surfaces 331a and 331b correspond to the exposed surfaces.

In addition, the inner and outer sides of the body 320 of the mold 300 are formed in two stages. Specifically, the first layer 321 connected to the lower portion of the protrusion 330 and extending to the side of the protrusion 330, and the second layer 322 connected to the lower portion of the first layer 321 and extending to the side of the first layer 321 are included. That is, the width of the inner and outer sides of the 2 nd layer 322 is greater than the width of the 1 st layer 321, and the width of the 1 st layer 321 is greater than the width of the protrusion 330.

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

On the other hand, specifically, the 1 st layer 321 includes: the other surface of the two sides to which the resins 10, 20 are bonded, the side surface connected to the other surface, and the surface connected to the side surface and the rib 310.

As shown in fig. 3 to 6 and 8, the resin inlet grooves 350 and 360 formed in the layer 1 321 are formed one on each side of the mold 300 with respect to the rib 310.

Specifically, the resin inlet grooves 350 and 360 are formed to penetrate the other surface and one surface of the 1 st layer 321.

The resin inlet grooves include primary inlet grooves 351, 361 extending in one direction through the other surface, and secondary inlet grooves 352, 362 connected to the one surface and extending in the direction from the primary inlet grooves 351, 361 toward the rib 310, that is, in the inward or outward direction depending on the formation position, and extending through the one surface.

Further, the width of the secondary inflow grooves 352, 362 is greater than that of the primary inflow grooves 351, 361. Specifically, the sum of the widths of the secondary inflow grooves 352 and 362 respectively formed at both sides is greater than half of the width of the 1 st layer 321. Since the area of the resin inflow grooves 350, 360 is sufficiently large, the pressure generated by the resin 10, 20 flowing into the resin inflow grooves 350, 360 at the time of injection may cause the protrusions 211,213 to be tightly combined with the mold 300, so that the Overlap (OL) may be maintained.

The secondary inflow grooves 352 and 362 are formed so as not to be parallel to the primary inflow grooves 351 and 361. Therefore, the resins 10, 20 flow into the resin inflow grooves 350, 360 and are cured, and the bonding strength between the resins 10, 20 and the mold 300 can be improved.

If there is only one flow into the grooves 351,361, the resin 10, 20 and the mold 300 exert force only on one side or the other, resulting in separation due to the absence of interlocking parts. However, since the secondary inflow grooves 352 and 362 according to the present invention generate interlocking portions of the resins 10 and 20 and the mold 300, the resins 10 and 20 and the mold 300 are not separated even if they are applied with a force to one side or the other side.

In addition, the resin inlet grooves 350 and 360 according to the present embodiment are formed in the entire mold 300 and spaced apart from each other.

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

Further, as shown in fig. 3, the secondary inflow grooves 352, 362 and the resins 10, 20 flowing into the secondary inflow grooves 352, 362 are exposed at one side of the mold 300.

In contrast, since one side of the resin inflow grooves 350, 360, i.e., the primary inflow grooves 351, 361 is covered by the resins 10, 20, it is not exposed to the user or the vehicle.

The resins 10 and 20 flowing into the mold 300 through the resin inflow grooves 350 and 360 push the mold 300 toward the second mold 200. Therefore, the protrusions 211 and 213 and the mold 300 can be stably kept overlapped by the pressure of the resin 10 and 20 flowing in.

The 1 st resin 10 and the 2 nd resin 20 thus formed each contain the primary inflow portions 11,21 and the secondary inflow portions that flow into the resin inflow grooves 350, 360.

The primary inflow portions 11 and 21 are located in the primary inflow grooves 351 and 361, and the secondary inflow portions are located in the secondary inflow grooves 352 and 362.

As shown in fig. 8, the cross-sectional shapes of the primary inflow portions 11 and 21 are the same as the cross-sectional shapes of the primary inflow grooves 351 and 361, and the cross-sectional shapes of the secondary inflow portions are the same as the cross-sectional shapes of the secondary inflow grooves 352 and 362.

Fig. 7 shows a part of the mold 410 and 420 for injection molding the mold 300.

Fig. 7 is a view illustrating portions where the resin inflow grooves 350, 360 are formed.

As shown in fig. 7, the mold dies 410, 420 include a 1 st mold die 410 and a 2 nd mold die 420 that form a mold cavity (S3) in the shape of the mold 300 as they are closed with each other.

The 1 st mold 410 has a shape corresponding to one surface of the mold 300 and the resin inlet grooves 350 and 360.

The 2 nd mold 420 has a shape corresponding to the other surface and both side surfaces of the mold 300.

As shown in fig. 7, one point of the other side of the 1 st mold die 410 is protruded to form groove forming parts 411a, 411b having a shape corresponding to the resin inflow grooves 350, 360 of the mold 300.

The plurality of groove forming portions 411a, 411b are formed at regular intervals in the 1 st mold 410.

Therefore, the mold 300 is molded by the mold dies 410 and 420, and the positions of the groove forming portions 411a and 411b are not filled with the resins 10 and 20, so that the plurality of resin inflow grooves 350 and 360 can be formed in the mold 300.

In addition, in this embodiment, the ribs 310 of the mold 300 are attached to the underside of the body 320 and are biased outwardly from the center when placed.

As shown in fig. 3 and 4, the cross section of the rib 310 is a rectangle having a length greater than a width in the up-down direction, as viewed from the side of the rib 310.

The ribs 310 enhance the rigidity of the mold 300.

The ribs 310 clamp the mold 300 in the mold 100, 200 for holding and supporting purposes.

On the other hand, the mold 300 may play various decorative roles by various colors, metal resin, painting, gold plating, and the like.

On the other hand, the protrusions 211,213 including the inner protrusion 211 and the outer protrusion 213 of the 2 nd mold 200 are formed to protrude from one surface of the 2 nd mold 200 toward the 1 st mold 100, i.e., toward the other side.

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

As shown in fig. 3 and 4, the projections 211 and 213 have a rectangular cross section when viewed from the side.

The protrusions 211,213 have a vertical length greater than a width.

The protrusions 211,213 include an inner protrusion 211 and an outer protrusion 213 that respectively surround the inner and outer sides of the mold 300.

The inner protrusion 211 and the outer protrusion 213 are the same shape, but may be different in size.

On the other hand, the inner protrusion 211 and the outer protrusion 213 are spaced apart from the protrusion 330 at a certain distance when the mold is closed. Specifically, the outer side of the inner protrusion 211 is adjacent to the protrusion 330 of the mold 300, as shown in fig. 3 and 4.

Further, the inside of the outside protrusion 213 is adjacent to the protrusion 330 of the mold 300 when the mold is closed.

Therefore, it is preferable to form a space (G) between the protruding portion 330 and the protruding portions 211, 213. Therefore, the width between the inner protrusion 211 and the outer protrusion 213 is greater than the width of the protrusion 330. Thus, the protrusions 211,213 can contact the main body 320 without scraping the protrusion 330 of the mold 300 when the mold is closed.

At this time, as specifically shown in fig. 4, the protruding portions 211,213 Overlap (OL) with the main body 320. Therefore, the positions where the protrusions 211 and 213 press the mold 300 on both sides of the top portion do not shake, and a good support can be obtained.

Due to the Overlap (OL), the protrusions 211,213 are pressed against a portion of the main body 320 at the time of closing the mold, so that the protrusions 211,213 of the 2 nd mold 200 and the main body 320 are tightly coupled, and the mixing of the dissimilar resins 10, 20 with each other can be prevented, and the overflow of the resins 10, 20 can be prevented.

At this time, the inner surface of the inner protrusion 211 also forms a part of the 1 st resin cavity S1, and the outer surface of the outer protrusion 213 also forms a part of the 2 nd resin cavity S2.

On the other hand, the 2 nd mold 200 is formed with a receiving portion 221 which is surrounded by the outer surface of the inner protrusion, the inner surface of the outer protrusion, and one surface 220 of a part of the 2 nd mold 200, and the other side is opened, and the protruding portion 330 is inserted and received therein.

A face 220 of a portion of the 2 nd mold 200 is a portion between the inner protrusion 211 and the outer protrusion 213 in a face of the 2 nd mold 200.

The shape of one face 220 of a portion of the 2 nd mold 200 is preferably a shape corresponding to the other face of the protrusion 330.

In addition, when the mold is closed, the other side of the casting mold 300 is tightly coupled to the 2 nd mold 200, the rib 310 is inserted and one side is tightly coupled to the 1 st mold 100.

Specifically, as shown in detail in fig. 4, one surface of the protruding portions 211 and 213 is in contact with the other surface of the main body 320 of the mold 300, and the other surface of the protruding portion 330 housed in the housing portion 221 is in contact with one surface 220 of a part of the 2 nd mold 200. Accordingly, the 2 nd mold 200 is tightly coupled to the other sides of the main body 320 and the protrusion 330 around both sides of the protrusion 330, so that the position of the mold 300 is well fixed and supported.

At this time, as shown in fig. 4, one face of the protrusion 211,213 and the main body 320 of the mold 300 are designed to overlap each Other (OL) in a certain size. Therefore, the position of the mold 300 can be maintained better, and the resin can be prevented from overflowing to the protrusion 330 side.

On the other hand, in fig. 4, the protruding portion 330 is spaced apart from the protruding portions 211,213 by a certain distance. This is to prevent the protrusions 211,213 and the protrusion 330 from contacting with the approach of the 1 st and 2 nd molds 100, 200 when the molds are closed, thereby preventing abrasion.

Even if the protrusion 330 and the protrusions 211,213 are spaced apart from each other, the protrusions 211,213 are pressed against the main body 320, and thus the mold 300 can absolutely play a role of preventing the resin from overflowing.

On the other hand, when mold closing and injection of the 1 st and 2 nd resins 10 and 20 are realized, as shown in fig. 4 in particular, the 1 st and 2 nd resins 10 and 20 are in contact with the side and top surfaces of the 1 st layer 321, a part of the side and top surfaces of the 2 nd layer 322, the inside of the inside protrusion 211, the outside of the outside protrusion 213, and the lower surface of the 1 st mold 100.

Accordingly, the 1 st resin 10 and the 2 nd resin 20 cured after injection are adhered to the side and top surfaces of the 1 st layer 321 and a part of the side and top surfaces of the 2 nd layer 322, and thus the speaker grill 10 and the trim panel 20 and the mold 300 are integrally molded.

At this time, the portions of the 1 st and 2 nd resins 10 and 20 contacting the body 320 have a plurality of layer shapes corresponding to the 1 st and 2 nd layers 321 and 322. Therefore, the mold 300 can ensure the adhesion between the speaker grill 10 and the trim panel 20 that are formed.

On the other hand, the valley portions 340a, 340b where the protrusion portions 211,213 of the 2 nd mold 200 are located are formed at the time of injection molding on the product.

At this time, the protrusions 211 and 213 are positioned at the valley portions 340a and 340b, and the protrusions 211 and 213 are closely combined with the 1 st and 2 nd resins 10 and 20 and the main body 320, so that it is possible to prevent the 1 st resin 10 from overflowing to the 2 nd resin chamber S2 or the 2 nd resin 20 from overflowing to the 1 st resin chamber S1. That is, the mold 300 functions to prevent mixing of different resins and boundaries between the respective structural elements.

As shown in fig. 2, the 1 st resin 10 and the 2 nd resin 20 are spaced apart from the protrusion 330 by the valley portions 340a, 340 b.

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

Method for molding door trim

A method of manufacturing a door trim using the door trim molding apparatus will be described below.

For a detailed description or shape of the molding apparatus and mold 300, reference is made to the foregoing.

Referring to fig. 9, a door trim molding method according to another embodiment of the present invention includes a first stage S10 of supporting the mold 300 on the 1 st mold 100 and placing the mold between the 1 st mold 100 and the 2 nd mold facing each other; a second stage S20 of forming a 1 st resin cavity S1 and a 2 nd resin cavity S2 on both sides of the casting mold 300 after the 1 st mold 100 and the 2 nd mold 200 are closed; a third stage S30 of curing and bonding both sides of the mold 300 after injecting the 1 st resin cavity S1 and the 2 nd resin cavity S2 with the 1 st resin 10 and the 2 nd resin 20, respectively; a fourth step S40 of taking out the molded product from the molds 100, 200 in order to integrate the cured 1 st and 2 nd resins 10, 20 with the mold 300; in the mold closing step S20, the inner protrusion 211 and the outer protrusion 213 protruding from the 2 nd mold 200 toward the 1 st mold 100 surround the protrusion 330 protruding from the main body 320 of the casting mold 300 toward the 2 nd mold 200 and Overlap (OL) the main body 320.

The cavity S1, S2 forming stage (S20): the 1 st and 2 nd resin inflow grooves 360 and 350 formed through both sides of the main body 320 of the casting mold 300 form the 1 st and 2 nd resin cavities S1 and S2 together with the 1 st and 2 nd molds 100 and 200.

The curing stage S30 (S30): the 1 st resin 10 and the 2 nd resin 20 are bonded only to the main body 320 in the mold 300.

The molding method will be described in more detail below.

First, the 1 st mold 100 is prepared.

Then, the rib 310 of the casting mold 300 is inserted into the groove 110 of the 1 st mold 100, and the other surface of the body 320 of the casting mold 300 is in contact with one surface of the 1 st mold 100, and the casting mold 300 is fixed and supported on the 1 st mold 100 (S10).

At this time, the mold 300 has a band shape, and thus, as shown in the cross section of fig. 5, the mold 300 may be stably fixed and supported on the 1 st die 100 by the ribs 310.

Then, the 1 st resin cavity S1 and the 2 nd resin cavity S2 are formed at both sides, respectively, based on the casting mold 300 in contact with the 1 st mold 100 and the 2 nd mold 200 that are closed (S20).

At this stage (S20), the protrusions 211,213 of the 2 nd mold 200 surround the protrusion 330 of the mold 300 and closely bonded and overlapped with the 1 st layer 321 of the main body 320, and the top surface of the protrusion 330 is in contact with the top surface of the receiving portion 221.

At this stage (S20), the resin inflow grooves 350 and 360 are connected to the space between the 1 st and 2 nd molds 100 and 200, and the mold 300 and the molds 100 and 200 form the 1 st and 2 nd resin cavities S1 and S2.

Then, in two nozzles respectively provided in the molds 100, 200, the 1 st resin 10 and the 2 nd resin 20 are simultaneously injected and respectively flow into the 1 st resin cavity S1 and the 2 nd resin cavity S2, and after the 1 st resin 10 and the 2 nd resin 20 which flow in are cured, as the speaker grill 10 and the decorative panel 20, respectively adhered to both sides of the mold 300 and the inside of the resin inflow grooves 350, 360 are formed (S30).

At this stage (S30), the 1 st resin 10 is placed inside with the mold 300 as a boundary, and the 2 nd resin 20 is placed outside with the mold 300 as a boundary. That is, the 1 st resin 10 contacts the other surface of the 1 st mold 100, the one surface of the 2 nd mold 200, and the inner side of the body 320 and the inner side of the inner protrusion 211, and the 2 nd resin 20 contacts the other surface of the 1 st mold 100, the one surface of the 2 nd mold 200, and the outer side of the body 320 and the outer side of the outer protrusion 213.

Further, at this stage (S30), the 1 st resin 10 and the 2 nd resin 20 are bonded on the main body 320 in a shape of a plurality of layers in the mold 300.

Further, at this stage (S30), the 1 st resin 10 flows into the 1 st resin inflow groove 360. At this time, the 1 st resin 10 flows into the primary inflow groove 361 and the secondary inflow groove 362 of the 1 st resin inflow groove 360 in this order to become the primary inflow portion 11 and the secondary inflow portion 12; the 2 nd resin 20 flows into the primary inflow groove 351 and the secondary inflow groove 352 of the 2 nd resin inflow groove 350 in this order to form the primary inflow portion 21 and the secondary inflow portion 22.

The pressure generated by the primary inflow grooves 351 and 361 and the secondary inflow grooves 352 and 362 as the resin flows into the resin inflow grooves 350 and 360 in sequence pushes the mold toward the 2 nd mold 200 side, thereby keeping the protrusions 211 and 213 overlapped with the 2 nd mold 200.

Then, the molds 100 and 200 are opened, and the product in which the speaker grill 10 and the decorative panel 20 are integrated with the mold 300 is taken out of the molds 100 and 200 (S40).

On the other hand, in the embodiment of the present invention, the resin inflow grooves 350, 360 are formed only in the 1 st layer 321, but may be formed at any position as long as the range of the primary inflow grooves 351, 361 can cover the resins 10, 20. For example, it may be formed in the entire range of the 1 st layer 321 and the 2 nd layer.

On the other hand, the cross-sectional shape of the resin inlet grooves 350 and 360 shown in fig. 3 is only a rectangle, but this is merely an example, and the cross-sectional shape may be circular, triangular, or the like.

On the other hand, in the present invention, "one side" means the lower side in fig. 3 to 5, and "the other side" means the upper side in fig. 3 to 5.

As described above, although the present invention has been described with reference to the preferred embodiments thereof, those having ordinary skill in the relevant art can implement various modifications and variations of the present invention without departing from the spirit and scope of the present invention as set forth in the claims below.

[ description of symbols ]

Description of reference symbols

10: 1 st resin (speaker grill) 20: no. 2 resin (decorative panel)

100: 1 st mold 110: groove

200: the 2 nd mold 210: protrusion part

220: part 221 of the 2 nd mold face: containing part

300: resin barrier member 310: ribs

320: the main body 330: projection part

350: 1 st resin inflow tank 360: no. 2 resin inflow tank

410: 1 st casting mold 411: groove forming part

420: the 2 nd casting mold S1: 1 st resin Chamber

S2: resin chamber 2S 3: casting die cavity