KR20120119822A - Manufacturing device of vehicle inner element and manufacturing method thereof - Google Patents

Abstract

PURPOSE: An injection molding machine for interior materials of a vehicle is provided to improve the quality of products by removing a mold parting line by manufacturing a molded article by injecting two or more materials for a single injection molding process. CONSTITUTION: An injection molding machine for interior materials of a vehicle comprises a cavity unit(110), a core unit(120), a first raw material supplying unit(130), a second raw material supplying unit(140), a core-back core(160), a core-back core operating unit(170), and an ejector unit(150). The cavity unit comprises a cavity(111), a cavity spacer(112), and a cavity fixing plate(113). The cavity fixing plate is fixed to the cavity spacer. The core unit is composed of a core(121), a core spacer(122), and a core fixing plate(123). A forming projection portion(121a) and a forming groove(111a) of cavity form a forming part(200). The core fixing plate is fixed to the core space. First and second raw material supplying part comprises first and second material manifolds(131, 141) and first and second raw material nozzles(132, 142). First and second raw materials are put in the first and the second manifolds respectively. The first and the second raw material nozzles are connected to the first and the second manifolds. The core-back core is installed in the forming groove and expands the forming portion. [Reference numerals] (AA) Cylinder

Description

Injection molding apparatus for automobile interior and its molding method {MANUFACTURING DEVICE OF VEHICLE INNER ELEMENT AND MANUFACTURING METHOD THEREOF}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to injection molding of automotive interior materials and a molding method thereof, and more particularly, to an injection molding apparatus for automotive interior materials and a molding method thereof for injection molding interior materials composed of multi-materials without an assembly process.

In general, the injection mold is equipped with a set of male and female molds configured to constitute a cavity therein, and the resin is cured by filling and cooling the molten resin in the inner cavity while the female and female mold are in close contact with each other. The female and female molds are opened to extract molded injection molded parts into the inner cavity.

Conventional injection molds are used to produce a large amount of objects of the same shape and the same material. Accordingly, in order to produce molded articles having the same shape but different materials, separate injection molds should be provided according to each material, and thus, a mold cost is added, thereby increasing the unit cost of the product.

In addition, in order to have injection molds for molding each material, a space for installing each mold must be secured.

In addition, since two or more single products must be molded and then assembled, there is a problem in that a gap or a step caused by assembly occurs and the quality is degraded.

Accordingly, the present invention has been made in order to solve the above problems, it is possible to reduce the unit cost of the product by molding in a single injection molding mold, without the assembly process when manufacturing the vehicle interior material consisting of two or more materials An object of the present invention is to provide an injection molding apparatus for a vehicle interior and a molding method thereof.

In addition, since the interior material made of two or more materials is molded by one injection molding mold, there is provided an injection molding apparatus for a vehicle interior material and a molding method thereof which can be molded without separation of the mold parting line to improve product quality. There is a purpose.

The present invention for achieving the above object, the cavity portion consisting of a cavity in which a forming groove is formed, a cavity spacer fixed to the cavity, and a cavity fixing plate fixed to the cavity spacer; A core part formed of a core formed on one surface of a forming protrusion corresponding to the forming groove, a core spacer fixed to the core, and a core fixing plate fixed to the core space; A primary material raw material supply unit including a primary material manifold provided at an outer side of the core and containing primary material raw materials, and a primary material nozzle connected to the primary material manifold; A secondary material raw material supply unit configured to include a secondary material manifold provided outside the core and containing secondary material raw materials, and a secondary material nozzle connected to the secondary material manifold; A core back core movably provided in the molding groove to expand the molding portion; A coreback operation unit for moving the coreback core; And an ejector unit for extracting the interior injection molded material formed in the molding unit.

In addition, the secondary material nozzle is preferably provided with a secondary material gate pin exposed to the molding portion protruding to the core back core so as to reciprocate.

In addition, the coreback operation unit, the coreback stopper is fixed to one surface of the coreback core; A stopper cylinder for reciprocating the coreback stopper; Preferably, the core back stopper includes locking means for intermittent reciprocating movement.

In addition, the locking means includes a pair of locking sliders movably installed; Preferably, the pair of locking cylinders includes a pair of locking cylinders for reciprocating the pair of locking sliders.

The ejector unit may include an ejector plate installed to be movable in the core unit; An ejector cylinder for reciprocating the ejector plate; It is preferable to include an ejector pin for protruding as necessary to the surface of the forming protrusion of the core to extract the interior material injection.

In addition, it is preferable that the forming protrusion protrudes at a predetermined height to prevent a flow of the primary raw material to flow around the secondary material Kate pin.

In addition, the present invention, the injection preparation step of forming a molded part for molding the interior material by bringing the cavity part in close contact with the core; Supplying a primary raw material to the molding unit through a primary raw material supply unit to perform injection molding of a primary raw material injection product; Expanding the molding to move the coreback core after this step to form a secondary material injection molding; Supplying a secondary material raw material through a secondary material raw material supply unit to the expanded molding part in the step to integrally mold the secondary material injection material on the primary material injection material to form an interior material injection material; Moving and releasing the cavity part in close contact with the core part when the secondary material injection molding is molded; It characterized in that it is configured to include the step of extracting the interior material injection by operating the ejector unit when the catity unit is released.

In addition, the extracting of the internal injection molding material may further include locking the coreback stopper by locking the coreback stopper by moving the locking cylinder after advancing the coreback stopper.

According to the present invention, since it is configured to supply two or more material raw materials to one injection-molding mold to injection-molded the interior material for molding the two materials, it is very easy to manufacture a vehicle interior material consisting of two or more materials. And, accordingly there is an effect that can reduce the unit cost of the product.

In addition, since two or more materials are integrally molded to one injection molding by one injection molding, there is no mold parting line portion, thereby improving the product quality.

1 is a cross-sectional view showing a vehicle interior injection molding apparatus according to an embodiment of the present invention.
FIG. 2 is a cross-sectional view illustrating main parts of a molding unit in which an end portion of the secondary material nozzle of FIG. 1 is installed. FIG.
3 to 8 are cross-sectional views showing a process of injection molding the interior material in the injection molding mold of the present invention.
Figure 9 is a block diagram showing a process of injection molding the interior material by an injection molding apparatus.

Specific embodiments of the present invention will be described with reference to the accompanying drawings. In this process, the thicknesses of the lines and the sizes of the components shown in the drawings may be exaggerated for clarity and convenience of explanation. In addition, the terms described below are terms defined in consideration of the functions of the present invention, which may vary depending on the intention or custom of the user, the operator. Therefore, definitions of these terms should be made based on the contents throughout this specification.

1 is a cross-sectional view showing a vehicle interior injection molding apparatus according to an embodiment of the present invention, Figure 2 is a cross-sectional view showing the main portion of the molding portion is provided with the end of the secondary material nozzle of Figure 1, Figures 3 to 8 Sectional view showing a process of injection molding the interior material in the injection molding mold of the present invention. 9 is a block diagram showing a process of injection molding an interior material by an injection molding apparatus.

As shown, the vehicle interior injection molding apparatus according to an embodiment of the present invention, the cavity portion 110, the core portion 120, the primary material raw material supply unit 130, the secondary material raw material supply unit 140, It consists of the ejector unit 150, the core back core 160, the core back core operating unit 170 is large, first supplying the primary raw material to form the primary injection material (A), and the primary material injection ( A) is a structure for molding interior materials after supplying secondary material raw materials again without separating A) to integrally mold the secondary material injection product (B) to the primary material injection product (A).

The cavity part 110 is a cavity 111 for forming a molding groove 111a for molding an interior material, and a cavity spacer for forming a constant installation space 112a and being installed on the other surface of the cavity 111. It is largely composed of a 112 and a cavity fixing plate 113 fixed to one surface of the cavity spacer 112.

The molding groove 111a formed on one surface of the cavity 111 is formed in a shape corresponding to the outer shape of the interior material to be molded, and the primary material injection material A and the secondary material injection material B in the molding groove 111a. It will be molded integrally.

In the lower portion of the molding groove 111a, a core back core 160 for extending the molding part 200 to mold the secondary material injection material B after molding the primary material injection material A is formed in the molding groove 111a. Is provided to reciprocate. The molding groove 111a is formed to communicate with the space 111b in which the coreback core 160 is reciprocated. When the coreback core 160 is moved, the molding part 200 is a secondary material injection material B. ) Is expanded to be formed integrally with the primary material injection molding (A).

The cavity spacer 112 for forming a predetermined installation space 112a is fixed to the other surface of the cavity 111.

The cavity spacer 112 stands on the edge of the cavity 111 to secure the installation space 112a for installing the coreback core operation unit 170 for vertically reciprocating the coreback core 160. Is fixed.

In addition, the cavity fixing plate 113 for blocking the installation space 112a is fixed to the cavity spacer 112.

The core part 120 is installed to be in close contact with one side of the cavity part 110, and is fixed to the edge of one surface of the core 121 and the core 121 provided on one surface of the cavity 111, and an installation space 122a. ) And a core fixing plate 123 fixed to the core spacer 122.

The core 121 is installed to reciprocate vertically on one surface of the cavity 111, and forms a molding part 200 corresponding to the molding groove 111a of the cavity 111 to mold the interior material injection molding on one surface of the cavity 111. The forming protrusion 121a is formed to protrude in the direction of the cavity.

In addition, one surface of the core 121 is configured to install the primary material nozzle 132 of the primary material raw material supply unit 130 to be described later.

The primary material raw material supply unit 130 is the core 121 and the cavity 111 is in close contact with each other to form the primary material raw material (A) when molding the interior material injection molding of the cavity 111 It is configured to supply to the forming portion 200 formed between the forming groove 111a and the forming protrusion 121a of the core 121.

The primary raw material supply unit 130 guides the primary raw material manifold 131 containing the primary raw material from the outside of the injection molding mold and the primary raw material supplied from the primary raw material manifold 131. And a primary material nozzle 132 for supplying to the molding part 200.

The primary material manifold 131 contains the primary material raw material in the liquid phase, and is connected to the primary material nozzle 132 to supply the primary material raw material.

The primary material nozzle 132 penetrates the core fixing plate 123 and passes through the space portion 122a formed by the core spacer 122, and then penetrates the core 121 and is formed on one surface of the core 121. Up to the gate 133 is provided.

The gate 133 is provided where the cavity 111 and the core 121 are in contact with each other, but is provided at the end of the primary material nozzle 122 toward the core 121 to supply the primary raw material to the molding part 200. It will be the entrance.

In addition, the secondary material raw material supply unit 140 is connected to the secondary material manifold 141 and the secondary material manifold 141 to contain the secondary material raw material from the outside of the injection molding mold, the molding unit 200 It is largely composed of a secondary material nozzle 142 for supplying the secondary raw material raw material.

The secondary material manifold 141 is provided on the outer side of the injection molding apparatus, but is formed in a pipe-shaped tube containing the secondary material. And in one embodiment of the present invention is provided on the side of the core portion 120 as shown in FIG.

The secondary material nozzle 142 penetrates through the core spacer 122 to be connected to the secondary material manifold 141 and passes through the space portion 122a formed by the core spacer 122 and faces one surface of the core 121. It is installed to the other surface of the core 121 through.

That is, one end of the secondary material nozzle 142 is exposed to the outside of one side of the core spacer 122, and the other end is provided up to the surface of the forming protrusion 121a of the core 121.

The secondary material nozzle 142 is configured to guide the secondary material raw material supplied from the secondary material manifold 141 to be ejected to the molding unit 200.

Meanwhile, as shown in FIG. 2, the secondary material gate pin 143 is installed to be reciprocated by a cylinder (not shown) at an end portion of the secondary material nozzle 142 at the forming protrusion 121a of the core 121. But, it is installed to protrude a predetermined length below the surface of the forming protrusion (121a).

The secondary material gate pin 143 protrudes to the surface of the forming protrusion 121a and is configured to be close to the core back core 160 provided in the cavity 111. That is, the secondary material Kate pin 143 protruding to the surface of the molding protrusion 121a is the primary material injection material (A) so that the secondary material injection material (B) may be integrally molded on one surface of the primary material injection material (A). In order to form a gate through which the secondary material is supplied.

In addition, as shown in FIG. 2, the flow preventing part 145 having a predetermined height protrudes from the periphery of the portion where the secondary material nozzle 142 is installed on one surface of the forming protrusion 121a of the core 121. The secondary material by weakening the flow of the primary material raw material around the gate pin 143 of the secondary material nozzle 142 protruding from the surface of the forming protrusion 121a of the core 121 by the flow preventing part 145. This is to make the gate of the raw material easily formed.

In addition, the core unit 120 is provided with an ejector unit 150 for separating the interior material injection molded injection molded in the molding unit 200, the ejector unit 150 is an ejector plate 151, ejector cylinder 152, The ejector pin 153 is large.

The ejector plate 151 is provided to be movable in the space portion 122a formed between the core 121 and the core fixing plate 123, and is configured to reciprocate by the ejector cylinder 152.

In addition, the ejector pin 153 is fixed to the opposite side of the ejector plate 151 to which the ejector cylinder 152 is fixed to penetrate the surface of the forming protrusion 121a of the core 121. That is, the ejector pin 153 is configured such that the other end protrudes to the surface of the forming protrusion 121a of the core 121 when one end is fixed to the ejector plate 151 and reciprocates.

The core back core 160 is installed to reciprocate in a space 111b extending below the forming groove 111a of the cavity 111 and moved during molding of the secondary material injection molding to form the forming groove 111a. It is configured to extend the molding part 200 by extending. The coreback core 160 is configured to reciprocate by the coreback core actuator 170.

The coreback core operation unit 170 is for reciprocating the coreback core 160, and is largely composed of a coreback stopper 171, a stopper cylinder 172, and a stopper locking means 173.

The coreback stopper 171 is in close contact with one surface of the coreback core 160 to prevent the coreback core 160 from being moved, and is connected to the stopper cylinder 172 as a driving means and configured to reciprocate.

Here, one end of the stopper cylinder 172 is connected to the core back stopper 171, the other end is installed in a state protruding to the outside through the cavity fixing plate 113.

The stopper locking means 173 is configured to reciprocally move the pair of locking sliders 173a and the pair of locking sliders 173a, which are slidably installed on opposite sides of the molding groove 111a of the cavity 111, respectively. It consists of the locking cylinder 173b.

That is, both sides of the coreback stopper 171 are wrapped with the locking slider 173a reciprocated by the locking slider 173a to prevent the coreback stopper 171 from flowing.

Protruding portions 171a protrude from both sides of the core back stopper 171, and groove portions 173c corresponding to the protruding portions 171a are formed on the locking slider 173a to form the groove portions 173c of the locking slider 173a. Is wrapped around the protrusion 171a of the coreback stopper 171 to prevent the coreback stopper 171 from being pushed or flown.

Hereinafter, the injection molding method of the automotive interior according to an embodiment of the present invention will be described with reference to FIGS. 3 to 9.

As shown, the injection molding method of the automotive interior material according to an embodiment of the present invention, by forming the molding portion 200 for molding the interior material by closely contacting the cavity portion 110, which is a movable mold to the core portion 120. Has an injection preparation step. (S100)

The cavity 111 of the cavity part 110, which is a movable mold, is brought into close contact with the core 121 of the core part 120. Then, after operating the stopper cylinder 172 to bring the coreback stopper 171 into close contact with one surface of the cavity 111, the locking cylinder 173a is operated to move the locking slider 173b to move the coreback stopper 171. ) To lock and lock the core back core 160.

Then, the secondary material gate pin 143 which is movable inside the secondary material nozzle 142 is moved to closely approach the end of the gate pin 143 without contacting the core back stopper 171. To form a molded part 200 capable of molding the interior material. That is, the gate pin 143 of the secondary material nozzle 142 is in a state where the molding part 200 protrudes.

After the injection preparation step (S100) has a step of molding the primary raw material injection (A) by injecting the primary raw material into the molding unit 200. (S110)

After the primary raw material contained in the primary raw material manifold 131 is supplied to the primary raw material nozzle 132, the forming unit 200 through the gate 133 provided at the end of the primary raw material nozzle 132. The primary raw material injection (A) is molded into.

The primary raw material supplied to the molding unit 200 fills the space of the molding unit 200, and all of the primary raw material is filled except for the part having the gate pin 143 of the secondary material nozzle 142. That is, the secondary material gate is formed by the secondary material gate pin 143 in the primary material injection molded product A formed while the gate pin 143 protrudes from the molding unit 200.

After the primary material forming step (S110), the coreback core 160 is moved to expand the molding unit 200 to form the secondary material injection molding (B). (S120)

The locking cylinder 173b is operated to move the locking slider 173a to be separated from the core back stopper 171. Then, the stopper cylinder 172 is operated to move the coreback stopper 171.

Then, when the coreback core 160 supported by the coreback stopper 171 is moved, the molding part 200 is expanded to form a secondary material between the coreback core 160 and the primary material injection molding A. FIG. It is to form a certain space for the injection molding (B).

After the molding part expansion step (S120), the secondary raw material is injected into the expanded molding part 200 to mold the secondary material injection product B. (S130)

After the secondary raw material contained in the secondary raw material manifold 141 is supplied to the secondary raw material nozzle 142, it expands through the secondary raw material Kate pin 143 provided at the end of the secondary raw material nozzle 142. It is supplied to the molded part 200 is a secondary material injection molding (B) is molded.

That is, the secondary raw material is formed by filling up the expanded molding unit 200, and then filled up to the secondary material Kate pin 143, the secondary material injection molding to fill the hole formed through the primary material injection (A) (B) is molded.

After the secondary material forming step (S130), the cavity part 110, which is in close contact with the core part 120, is moved to release the cavity part 110, which is a movable mold. (S140)

And, after the cavity part release step (S140) has a step of extracting the interior material injection molded in the forming protrusion 121a of the core 121. (S150)

In order to extract the interior injection molded material attached to the forming protrusion 121a of the core 121, the ejector cylinder 152 is first operated.

When the ejector cylinder 152 is operated, the ejector plate 151 is moved, and the ejector pin 153 fixed to the ejector plate 151 is moved together. At this time, the ejector pin 153 protrudes to the surface of the molding protrusion 121a to push out the interior material injection molded in the molding protrusion 121a.

In the cavity 110, after the stopper cylinder 172 is operated to advance the core back stopper 171, the locking cylinder 173b is operated. Then, the locking slider 173a moves to wrap the coreback stopper 171 to lock the coreback core 160 to prepare the next interior material injection molding.

As described above, the present invention has been described with reference to the embodiments shown in the drawings, but this is merely exemplary, and those skilled in the art to which the art belongs may have various modifications and other equivalent embodiments therefrom. I understand that it is possible. Accordingly, the true scope of the present invention should be determined by the following claims.

100: injection mold 110: cavity portion
111: Cavity 112: Cavity spacer
113: cavity fixing plate
120: core portion 121: core
122: core spacer 123: core fixing plate
130: primary material feeder 131: primary material manifold
132: primary material nozzle
140: secondary material raw material supply unit 141: secondary material manifold
142: secondary material nozzle 143: secondary material gate pin
145: flow prevention unit
150: ejector portion 151: ejector plate
152: ejector cylinder 153: ejector pin
160: coreback core
170: core back core operating unit 171: core back stopper
172: stopper cylinder 173: locking means
200: molding part

Claims (8)

A cavity part including a cavity in which a molding groove is formed, a cavity spacer fixed to the cavity, and a cavity fixing plate fixed to the cavity spacer;
A core part formed of a core formed on one surface of a forming protrusion corresponding to the forming groove, a core spacer fixed to the core, and a core fixing plate fixed to the core space;
A primary material raw material supply unit including a primary material manifold provided at an outer side of the core and containing primary material raw materials, and a primary material nozzle connected to the primary material manifold;
A secondary material raw material supply unit including a secondary material manifold provided on an outer side of the core and containing secondary material raw materials, and a secondary material nozzle connected to the secondary material manifold;
A core back core movably provided in the molding groove to expand the molding portion;
A coreback operation unit for moving the coreback core; And
Injection molding apparatus for a vehicle interior, characterized in that it comprises an ejector portion for extracting the interior material injection molded in the molding portion. The method of claim 1,
The secondary material nozzle is injection molding apparatus for a vehicle interior, characterized in that the secondary material gate pin is exposed to the molding portion and protrudes close to the core back core to be reciprocated. The method of claim 1,
The core back operation unit,
A coreback stopper fixed to one surface of the coreback core;
A stopper cylinder for reciprocating the coreback stopper;
Injection molding apparatus for a vehicle interior material comprising a locking means for intermittent reciprocating movement of the core back stopper. The method of claim 3,
The locking means,
A pair of locking sliders installed to be movable;
And a pair of locking cylinders for reciprocating the pair of locking sliders, respectively.
The method of claim 1,
The ejector unit, the ejector plate is installed to be movable in the core portion;
An ejector cylinder for reciprocating the ejector plate;
Injection molding apparatus for a vehicle interior material comprising a ejector pin for protruding as necessary to the surface of the forming protrusion of the core to extract the interior material injection. The method of claim 2,
Injection molding apparatus of the automobile interior material, characterized in that the forming protrusion protrudes to a certain height flow prevention portion for weakening the flow of the primary material raw material around the secondary material Kate pin.
An injection preparation step of forming a molding part for molding the interior material by bringing the cavity part into close contact with the core part;
Supplying a primary material raw material to the molding unit through a primary material raw material supplying part to perform injection molding of a primary material injection product;
Expanding the molding to move the coreback core after this step to form a secondary material injection molding;
Supplying a secondary material raw material through a secondary material raw material supply unit to the expanded molding part in the step to form an internal injection material by integrally molding the secondary material injection material on the primary material injection material;
Moving and releasing the cavity part in close contact with the core part when the secondary material injection molding is molded;
Injection molding method for a vehicle interior, characterized in that comprises a step of extracting the interior material injection by operating the ejector unit when the catity unit is released.
The method of claim 7, wherein
The extracting of the interior injection material further includes the step of advancing the core back stopper, and then locking the core back stopper by locking the core back stopper by operating a locking cylinder to lock the lock. .

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