KR101384114B1 - Injection molding apparatus - Google Patents

Abstract

The present invention relates to an injection molding apparatus, and more particularly, to an injection molding apparatus capable of producing a molded article having a fiber skin material.
The configuration, the lower mold; An upper mold disposed above the lower mold and having an inner receiving portion opened downward; A core disposed in the accommodation portion of the upper mold; A lower portion formed on the upper surface of the lower mold; An upper dividing surface formed on the lower surface of the core to correspond to the lower dividing surface, and having a fiber skin material disposed on the lower side, and forming a cavity with the lower dividing surface when the lower and upper molds are combined; A resin injection unit formed in the lower mold and communicating with the cavity when the lower and upper molds are coupled; And a core separation means for separating the upper division surface from the fiber skin material in a state in which the lower and upper molds are coupled to each other.
Resin injected into the cavity through the resin injection unit is characterized in that the upper divided surface is cooled in the state spaced apart from the fiber skin material by the core spacing means.
According to this configuration, the upper divided surface formed on the core is raised by the core spaced apart means to be spaced apart from the fiber skin material, thereby preventing the fiber skin material from being deformed by pressure when cooling the resin injected into the cavity. have.

Description

Injection Molding Apparatus for Manufacturing Moldings with Fiber Skin Material {INJECTION MOLDING APPARATUS}

The present invention relates to an injection molding apparatus, and more particularly, to an injection molding apparatus capable of producing a molded article having a fiber skin material.

In general, molded articles such as door trims, fillers, trunk mats, package trims, headliners, etc., which are used as interior materials for automobiles, have a good skin feel, and fiber skin materials are formed for the purpose of high quality.

On the other hand, as a technology for manufacturing a molded article having such a fiber skin material, Korean Patent Publication No. 10-0856751 (published Aug. 29, 2008, hereinafter referred to as 'prior art') "cloth insert vacuum injection method and mold Structure ”.

The prior art

"Upward and backward upper mold, located on one side of the upper mold, a fixed lower mold corresponding to the upper mold, and one side of the upper mold is formed with a conventional cloth guide Robert so that the cloth is fixed to the upper inside of the upper mold In the cloth insert vacuum injection mold structure provided with,

The upper mold has an upper mold support formed on the upper side, an upper mold inside formed on the center lower portion of the upper mold support, two heaters provided on one side of the upper mold support, and are spaced apart from the upper mold support at a predetermined interval. And a plurality of fixing pins having springs fixed to the fabric and having a spring on the rear surface, a vacuum suction port formed at one side of the upper mold support and connected to an external vacuum pump, and connected to the vacuum suction port and penetrated to the inside of the upper mold. Consists of a suction pipe, and a heating wire connected to two heaters provided on one side of the upper mold inside and the upper mold support, and installed in a product shape,

The lower mold is located on the upper side of the lower mold fixing part, the lower mold inside fixed to the upper upper mold fixing, and formed at regular intervals apart from the lower mold support, corresponding to the fixing pins provided in the upper mold support A plurality of fixing pin grooves, a plurality of mill pins formed at regular intervals in a lower portion of the lower mold, and pushed out of a molded product through the inner upper portion of the lower mold after the molding; A lower upper wheat plate formed on left and right sides and formed at a lower portion of the plurality of mill pins, a lower lower wheat plate formed on a lower portion of the lower upper wheat plate, and formed on left and right sides of the lower mold fixing part and supporting the mill pins. The upper and lower hydraulic cylinders for moving the upper and lower tight plates up and down, and formed in the lower portion of the upper and lower hydraulic cylinders to fix the upper and lower hydraulic cylinders. Is a hydraulic cylinder supporter, a resin injection nozzle installed in the center of the lower mold fixing part to inject resin into the inside of the lower mold, and a resin injection hole connected to the resin injection nozzle by a resin injection pipe to inject resin. It is made, including.

The prior art proposes a technique for fixing the insert inside the upper mold to insert the injection with the transition resin,

Due to the heat of the resin and the pressure of the mold during cooling of the injected resin, there is a problem in that a high-quality molded article is not obtained because the cloth is pressed or the raised part of the cloth surface is pressed to deform the cloth.

Accordingly, an object of the present invention is to provide an injection molding apparatus for manufacturing a molded article having a fiber skin material which can improve the quality by allowing the pressure applied to the cloth after resin injection to be improved.

In order to solve the above problems, the injection molding apparatus for producing a molded article having a fiber skin material according to the present invention,

Lower mold;

An upper mold disposed above the lower mold and having an inner receiving portion opened downward;

A core disposed in the accommodation portion of the upper mold;

A lower portion formed on the upper surface of the lower mold;

An upper dividing surface formed on the lower surface of the core to correspond to the lower dividing surface, and having a fiber skin material disposed on the lower side, and forming a cavity with the lower dividing surface when the lower and upper molds are combined;

A resin injection unit formed in the lower mold and communicating with the cavity when the lower and upper molds are coupled; And

Core separation means for separating the upper partition surface from the fiber skin material in a state that the lower and upper molds are coupled;

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Resin injected into the cavity through the resin injection unit is characterized in that the upper partition surface is cooled in the state spaced apart from the fiber skin material by the core spacing means.

According to another aspect of the present invention,

The core separation means

A female screw portion formed on the core; And

A drive motor coupled to the upper mold and having a rotating shaft screwed to the female screw portion;

.

According to another feature of the invention,

The core separation means

A recess formed in the lower center of the upper core;

A fastening block inserted into the recess;

An inner space formed through the center of the upper mold up and down;

A seating part formed at a lower end of the space part and extending outward of the space part; And

A mounting plate installed on the seating part;

Consists of more,

The female screw portion is formed in the center of the fastening block,

The drive motor is mounted to the mounting plate and disposed in the space part.

According to another feature of the invention,

The core separation means

Recesses recessed in both sides of the upper end of the core;

A descending slope formed on the inner wall of the recess;

Two side guides which are coupled to each other on both sides of the inner wall of the recess, and each having a locking portion protruding inwardly on an upper surface of the inner surface facing each other, and a rising slope formed on the lower surface of the locking portion in parallel with the falling slope;

A corresponding lower inclined surface interposed between the two side guides and formed on a lower surface to be in contact with the lower inclined surface, a corresponding engaging portion protruding outwardly from both ends, and a corresponding rising portion formed on an upper surface of the corresponding engaging portion and in contact with the rising slope; A wedge member having an inclined surface; And

A drive unit for advancing and retracting the wedge member;

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The core is lowered by an operation in which the corresponding descending inclined surface enters along the lowered inclined surface when the wedge member is moved forward by the driving unit, and the corresponding upwardly inclined surface is raised when the wedge member is retracted by the driving unit. It is characterized by being raised by the operation of moving out along the inclined surface.

According to another feature of the invention,

The core separation means

A lower guide coupled to a lower side of the recess inner wall and having a lower inclined surface on an upper surface thereof;

A corresponding recess formed in an upper recess in an upper side of an inner wall of the receiving portion of the upper mold so as to face the recess; And

An upper guide inserted into the corresponding recess to contact the upper surface of the wedge member;

.

Injection molding apparatus for producing a molded article having a fiber skin material according to the present invention,

The upper divided surface formed in the core is raised by the core spaced apart means and spaced apart from the fiber skin material, thereby preventing the fiber skin material from being deformed by pressure when cooling the resin injected into the cavity.

1 to 4 is a cross-sectional view showing a step-by-step operation of the state in which the core separation means of the first embodiment is applied in the injection molding apparatus according to an embodiment of the present invention.
5 is an enlarged view taken from "A" of FIG.
6 to 9 is a cross-sectional view showing a step-by-step operation of the state in which the core separation means of the second embodiment in the injection molding apparatus according to an embodiment of the present invention is applied.
10 is a plan view of FIG. 6.
11 is a side cross-sectional configuration diagram of the core separation means of the second embodiment;
12 is an exploded perspective view showing the main part of the core separation means of the second embodiment;

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 to 12, an injection molding apparatus (hereinafter, referred to as an 'injection molding apparatus') for manufacturing a molding having a fiber skin material according to an embodiment of the present invention is largely a lower mold 100, an upper mold ( 200), the core 300 and the core spaced apart means (400, 500).

Looking at each configuration below,

The lower mold 100 is

A lower portion of the lower surface 110 formed on the upper surface, and the resin injection portion 120 opened toward the lower portion of the lower surface (110).

The lower part surface 110 is formed to protrude upward in the center of the upper surface of the lower mold 100, a flat surface 130 is formed in contact with the upper mold 200 on the upper edge of the lower mold (100).

In addition, the lower mold 100 includes a known eject plate 140 and an eject pin 150 for separating the finished molding 10 and the resin injection unit 120. Heating block 160 for heating the molten resin is provided.

The upper mold 200

It is disposed above the lower mold 100, and has an inner receiving portion 210 which is opened downward.

The upper mold 200 is installed to be elevated by a known hydraulic device or the like, and when combined with the lower mold 100 by the lowering operation, the lower portion 110 is located in the receiving portion 210. do.

The core 300 is

As it is disposed in the receiving portion 210 of the upper mold 200, the upper divided surface 310 is formed on the lower surface.

The upper division surface 310 forms a cavity together with the lower division surface 110 when the lower and upper molds 100 and 200 are coupled to each other.

On the other hand, the fiber skin 11 is disposed below the upper divided surface 310.

The fiber skin material 11 may be made of various materials such as woven fabrics and nonwoven fabrics. The fiber skin material 11 may be placed on the lower portion of the lower surface 110 or temporarily placed on the upper divided surface 310 by using a separate vacuum adsorption means or an adhesive. By attaching it may be disposed between the lower and upper divided surfaces (110, 310).

In addition, the fibrous skin material 11 disposed as described above is positioned above the cavity when the lower and upper molds 100 and 200 are coupled to each other, and then the molten resin is injected into the cavity through the resin injection part 120. The insert is injected with the resin.

The core spacing means (400, 500)

In the state in which the lower and upper molds 100 and 200 are coupled, the upper divided surface 310 is spaced apart from the fibrous skin 11, as shown in FIGS. 1 to 5 and 6 to 12. As can be made of the first and second embodiments.

Hereinafter, reference numerals of the core spacers of the first embodiment will be referred to as '400', and reference numerals of the core spacers of the second embodiment are designated as '500'.

First, the core separation means 400 of the first embodiment will be described.

As shown in Figure 1 to Figure 5 the core separation means 400 according to the first embodiment

A female screw part 410 formed on the core 300; And

A driving motor 420 coupled to the upper mold 200 and having a rotating shaft 421 screwed to the female screw part 410;

.

Naturally, a male screw is formed on the rotation shaft 421 of the driving motor 420 for screwing with the female screw portion 410.

As a result, the core spacer 400 according to the first embodiment uses the operation of tightening or loosening the rotation shaft 421 and the female screw part 410 by the rotation of the driving motor 420. 300 is to be moved up and down in the receiving portion 210 of the upper mold (200).

The drive motor 420 uses a servo motor, but by connecting a separate controller to control the distance from which the upper partition surface 310 is spaced apart from the fiber skin material 11. Desirable,

At this time, the upper dividing surface 310 is spaced so that only the raised portion (11a, see Fig. 4) of the pressurized fiber skin material 11 when the lower and the upper mold (100, 200) is combined to stand in its original state. It is preferable.

On the other hand, referring to Figure 5 in more detail look at the core separation means 400 according to the first embodiment,

A recessed portion 430 formed in the lower center of the upper portion of the core 300;

A fastening block 440 inserted into the recess 430;

An inner space portion 450 formed through the center of the upper mold 200 up and down;

A seating portion 460 formed at a lower end of the space portion 450 and extending outwardly of the space portion 450; And

A mounting plate 470 installed on the seating portion 460;

Consists of more,

The female screw portion 410 is formed in the center of the fastening block 440,

The driving motor 420 is mounted to the mounting plate 470 and disposed in the space 450.

The fastening block 440 is detachably coupled to the core 300 by bolts. The fastening block 440 may be prevented from being easily damaged by the female screw part 410 as manufactured with a material having excellent rigidity.

In addition, even if the female screw portion 410 formed in the fastening block 440 is damaged, it can be easily repaired by replacing only the fastening block 440.

The driving motor 420 is embedded in the upper mold 200 by the space portion 450, the seating portion 460, and the mounting plate 470.

In addition, a cover 220 covering the space 450 is coupled to the upper mold 200. The bottom of the cover 220 is formed in the center recessed groove 221 is formed in the upper recess, the mounting groove 221 is fitted to the upper end of the drive motor 420 when the cover 220 is coupled to drive the motor 420 Support.

Hereinafter, the core separation means 500 of the second embodiment will be described.

6 to 12, the core separation means 500 of the second embodiment is

Recesses 510 formed in lower recesses on both sides of the upper end of the core 300;

A falling slope 520 formed below the inner wall of the recess 510;

The recess 510 is coupled to each other on both sides of the inner wall of the recess 510, and is formed to protrude inwardly on an upper surface of the inner surface facing each other, and parallel to the lower slope 520 on a lower surface of the catch 531. Two side guides 530 having raised slopes 532 formed thereon;

Interposed between the two side guides 530, the corresponding lower slopes 541 formed on the lower surface and in contact with the lower inclined surface 520, the corresponding engaging portion 542 formed to protrude outwardly at both ends, and the corresponding engaging portion A wedge member 540 formed on an upper surface thereof and having a corresponding upwardly inclined surface 543 in contact with the upwardly inclined surface 532; And

A driver 550 for advancing and retracting the wedge member 540;

.

As a result, the core 300 is lowered by an operation in which the corresponding down slope 541 enters along the down slope 520 when the wedge member 540 is moved forward by the driving unit 550. In the retraction operation of the wedge member 540 by the driving unit 550, the corresponding upwardly inclined surface 543 is elevated by the operation of moving out along the upwardly inclined surface 532.

That is, the core separation means 500 of the second embodiment uses the core 300 to receive the portion 210 of the upper mold 200 by using the retraction operation of the wedge member 540 by the driving unit 550. Lifting operation within.

According to the core spacing means 500 of the second embodiment, unlike the core spacing means 400 of the first embodiment, the torque is not transmitted to the core 300 so that the core 300 is more smoothly. The lifting operation may be performed, and as shown in FIG. 10, a plurality of core separation means 500 may be provided to disperse the stress generated during the lifting operation of the core 300.

As shown, the drive unit 550 is a cylinder is applied, the body 551 is coupled to the side of the upper mold 200, the rod 552 penetrates the upper mold 200 laterally to the wedge Is coupled to the member 540. That is, the wedge member 540 is moved forward and backward by the operation of the cylinder.

However, the drive unit 550 may be a servo motor, such as the drive motor 420 of the core separation means 400 of the first embodiment. That is, the wedge member 540 can be moved forward and backward by connecting the rotational shaft of the servo motor to the wedge member 540. In this case, by adjusting the retraction distance of the wedge member 540 by using a servo motor, the distance between the upper dividing surface 310 and the fiber skin 11 can be adjusted.

On the other hand, the core separation means 500 of the second embodiment

A lower guide 560 coupled to a lower side of an inner wall of the recess 510 and having a lower inclined surface 520 on an upper surface thereof;

A corresponding recess 570 having an upper recess formed in an upper side of an inner wall of the receiving portion 210 of the upper mold 200 so as to face the recess 510; And

An upper guide 580 inserted into the corresponding recess 570 to be in contact with an upper surface of the wedge member 540;

As shown in FIG.

According to this, the lower and upper guides 560 and 580 are made of a material having excellent rigidity, so that the friction surface (ie, the upper guide) with the wedge member 540 in the lower slope 520 and the upper mold 200. Lower surface of the wedge member) can be prevented from being easily worn by the retraction operation of the wedge member 540.

In addition, as the device is used for a long time, the lower and upper guides 560 and 580 can be easily repaired even if the lower slopes 520 and the lower surface of the upper guide 580 wear out. Can be.

In addition, as shown in FIG. 10, the injection mold apparatus to which the core spacer 500 of the second embodiment is applied may be provided with a gap maintaining means 600.

The gap maintaining means 600 is for maintaining the core 300 spaced apart only a necessary distance,

A driving cylinder 610 installed on the front and rear surfaces of the lower or upper molds 100 and 200;

A support plate 620 coupled to the driving cylinder 610 so as to be retracted and disposed between the lower portion 110 and the upper portion 310 during the forward operation; And

Receiving groove 630 formed in the lower or upper mold (100, 200) so that the support plate 620 is retracted operation;

.

As a result, the support plate 620 is moved forward in the state in which the core 300 is raised by the core spacer 500 of the second embodiment, so that the support plate 620 is between the lower part surface 110 and the upper part surface 310. As it is disposed in the to support the core 300 to maintain a predetermined interval even if the core 300 is lowered.

Accordingly, the support plate 620 may have various thicknesses according to the thickness of the fiber skin material 11.

The gap maintaining means 600 may be useful when it is difficult to adjust the lifting distance of the core 300 as the core spacing means 500 is made of a cylinder.

Hereinafter, an operation process of the injection molding apparatus to which the core spacer 400 and 500 of the first and second embodiments is applied will be described with reference to FIGS. 1 to 4 and 6 to 9.

Prior to the description, the injection molding apparatuses to which the core spacers 400 and 500 of the first and second embodiments are applied, respectively, operate in the same process. Hereinafter, the core spacer means 400 according to the first embodiment will be described. It will be described with reference to the accompanying drawings, the core separation means 500 of the second embodiment.

First, as shown in FIGS. 1 and 6, the fiber skin material 11 is disposed between the lower and upper divided surfaces 110 and 310 in a state in which the lower and upper molds 100 and 200 are separated. At this time, the core 300 is disposed in a lowered state by the core spacing means (400, 500).

Subsequently, when the lower and upper molds 100 and 200 are coupled as illustrated in FIGS. 2 and 7, the lower and upper dividing surfaces 110 and 310 are engaged with each other to form a cavity, and the resin injector 120 is disposed. The molten resin is injected into the cavity through).

Thereafter, when cooling of the resin injected into the cavity proceeds, the core spacer 400 and 500 are operated as shown in FIGS. 3 and 8 to raise the core 300. That is, the upper division surface 310 formed on the lower surface of the core 300 is spaced apart from the fiber skin material 11.

On the other hand, the core 300 may be disposed in an elevated state until the cooling of the resin is completed, it is preferable that the lifting operation several times to maintain the shape of the injected resin.

Subsequently, when the cooling of the resin is completed, the lower and upper molds 100 and 200 as shown in FIGS. 4 and 9 are separated, and the eject plate 140 and the eject pin 150 are raised to form a molded article ( 10) is taken out from the lower mold (100).

In the above description of the present invention with reference to the accompanying drawings, a description has been made mainly on the "injection molding apparatus for manufacturing a molded article having a fiber skin material" having a specific shape and structure, the present invention can be variously modified and changed by those skilled in the art And, such variations and modifications should be construed as falling within the protection scope of the present invention.

100; Lower mold
110; Subsection 120; The resin-
130; Flat surface 140; Eject Plate
150; Eject pin 160; Heating block
200; Upper mold
210; Receiver 220; cover
300; core
310; Upper partition
400; Core Spacer
410; Female screw portion 420; Drive motor
430; Depression 440; Fastening Block
450; Space 460; Seat portion
470; Mounting plate
500; Core Spacer
510; Recess
520; Slope
530; Side guide
531; Locking portion 532; Rising slope
540; Wedge member
541; Corresponding down slope 542; Counterpart
543; Ascending slope
550; The driving unit
551; Body 552; road
560; Lower guide
570; Correspondence recess
580; Upper guide

Claims (5)

Lower mold 100;
An upper mold (200) disposed above the lower mold (100) and having an inner receiving portion (210) opened downward;
A core 300 disposed in the receiving portion 210 of the upper mold 200;
A lower partial surface 110 formed on an upper surface of the lower mold 100;
It is formed on the lower surface of the core 300 so as to correspond to the lower portion of the lower surface 110, the fiber skin material 11 is disposed on the lower side, when the lower and upper molds (100, 200) is coupled to the lower portion ( An upper dividing surface 310 to form a cavity with 110;
A resin injection part 120 formed in the lower mold 100 and communicating with a cavity when the lower and upper molds 100 and 200 are coupled; And
Including a state in which the lower and upper molds (100, 200) are coupled, the core separation means 400 for separating the upper partition surface 310 from the fiber skin 20;
The core spacing means 400
A recessed portion 430 formed in the lower center of the upper portion of the core 300;
A fastening block 440 inserted into the recess 430;
An inner space portion 450 formed through the center of the upper mold 200 up and down;
A seating portion 460 formed at a lower end of the space portion 450 and extending outwardly of the space portion 450;
A mounting plate 470 installed on the seating portion 460;
A female screw part 410 formed at the center of the fastening block 440; And
Fiber mounted to the mounting plate 470 is disposed in the space portion 450, the drive motor 420 having a rotating shaft 421 is screwed to the female screw portion 410; Injection molding apparatus for forming a molded article having a skin material.
Lower mold 100;
An upper mold (200) disposed above the lower mold (100) and having an inner receiving portion (210) opened downward;
A core 300 disposed in the receiving portion 210 of the upper mold 200;
A lower partial surface 110 formed on an upper surface of the lower mold 100;
It is formed on the lower surface of the core 300 so as to correspond to the lower portion of the lower surface 110, the fiber skin material 11 is disposed on the lower side, when the lower and upper molds (100, 200) is coupled to the lower portion ( An upper dividing surface 310 to form a cavity with 110;
A resin injection part 120 formed in the lower mold 100 and communicating with a cavity when the lower and upper molds 100 and 200 are coupled; And
In the state in which the lower and the upper mold (100, 200) is coupled, the core separation means 500 for separating the upper partition surface 310 from the fiber skin 20;
The core separation means 500 is
Recesses 510 formed in lower recesses on both sides of the upper end of the core 300;
A falling slope 520 formed below the inner wall of the recess 510;
The recess 510 is coupled to each other on both sides of the inner wall of the recess 510, and is formed to protrude inwardly on an upper surface of the inner surface facing each other, and parallel to the lower slope 520 on a lower surface of the catch 531. Two side guides 530 having raised slopes 532 formed thereon;
Interposed between the two side guides 530, the corresponding lower slopes 541 formed on the lower surface and in contact with the lower inclined surface 520, the corresponding engaging portion 542 formed to protrude outwardly at both ends, and the corresponding engaging portion A wedge member 540 formed on an upper surface thereof and having a corresponding upwardly inclined surface 543 in contact with the upwardly inclined surface 532; And
It comprises a; drive unit 550 for the forward and backward operation of the wedge member 540,
The core 300 is lowered by an operation in which the corresponding lower slope 541 enters along the lower slope 520 during the forward operation of the wedge member 540 by the driver 550, and the drive unit ( When the wedge member 540 is retracted by 550, the corresponding upwardly inclined surface 543 is lifted by the retirement operation along the upwardly inclined surface 532. Injection molding device.
3. The method of claim 2,
The core separation means 500 is
A lower guide 560 coupled to a lower side of an inner wall of the recess 510 and having a lower inclined surface 520 on an upper surface thereof;
A corresponding recess 570 having an upper recess formed in an upper side of an inner wall of the receiving portion 210 of the upper mold 200 so as to face the recess 510; And
The upper guide 580 is inserted into the corresponding recess 570 to be in contact with the upper surface of the wedge member 540; injection molding apparatus for manufacturing a molding having a fiber skin material, characterized in that it further comprises.
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