KR102454551B1 - The vacuum and thermal compression molding apparatus for skin of automobile interior material - Google Patents

Abstract

The present invention relates to a skin vacuum and thermocompression mold apparatus for automotive interior materials. According to the present invention, the skin, which is composed of a foam layer that provides cushioning power and a fabric layer with an embossed pattern, is pre-formed according to the shape of the interior material, and vacuum and heat-compressed in a mold so that even if the thickness of the skin is made thick, the skin can be adhered to the interior material, and tactile feeling can be enhanced through the cushioning power of the foam layer of the skin. Also, various patterns such as embossing of the fabric layer can be used, so visual design effects can be realized together. When the skin molded according to the shape of the interior material is placed on the interior material, the position of the skin can be accurately positioned through a reference pin, and thermal compression and vacuum adsorption are performed at the same time to prevent air bubbles from occurring on the surface of the skin. In addition to upper and lower molds, a cam cylinder and a side band cam cylinder are installed to heat-press an entire surface of the skin to the interior material.

Description

Skin vacuum and thermal compression molding apparatus for skin of automobile interior material

The present invention relates to a skin thermocompression mold apparatus for automobile interior materials, and more particularly, in a mold in a state in which a skin composed of a foam layer providing cushioning force and a fabric layer having an embossed pattern formed thereon is molded according to the shape of the interior material. It relates to a skin vacuum and thermocompression mold apparatus for automobile interior materials that are vacuum and thermocompressed.

In general, as interior materials for automobiles, there are instrument panels, door trims, pillars, trunk mats, package trims, headliners, and the like, and these interior materials have different materials and configurations depending on the vehicle model.

In addition, some car models use injection-molded interior materials using only a hard substrate, and some vehicle models use interior materials in which a soft skin material is attached to a part or the entire surface of the injection-molded rigid substrate.

And the material of the hard substrate to be injection molded is PP, POLY-PROPYLENE FELT, PP board (POLY-PROPYLENE BOARD), ABS, wood stock, resin felt. FELT), etc. are mainly used, and as a soft skin material bonded to the surface of the substrate, PE FOAM, PP FOAM, PP foam (PU FOAM) etc. are mainly used.

In addition, for the injection molding of the substrate for automobile interior materials and the attachment of the skin material, conventionally, a low-pressure injection molding method and a high-pressure injection molding method are mainly used, and the low-pressure injection molding method uses the skin material before injecting the injection liquid of the substrate. This is a method in which the base material molding and the skin material adhesion are made at the same time by injecting the injection liquid at a low pressure in the state that it is inserted between the two molds. Injection equipment is expensive (2~3 billion won), so there are many factors of cost increase and the quality of the skin material is deteriorated due to severe damage.

On the other hand, the Republic of Korea Intellectual Property Office Registered Patent Publication No. 10-0823652 (hereinafter referred to as prior art) discloses a vacuum forming apparatus for skin attachment.

The prior art is a vacuum forming apparatus for forming a flexible thin plate-shaped member by vacuum pressure, the shape forming a shape part of the flexible thin plate-shaped member to be formed by vacuum pressure from the inside to the flexible thin plate member A breathable material 80 having a surface, and a non-breathable material 70 in which a vacuum tunnel 71 for forming a frame for fixing the breathable material 80 and applying a vacuum to the breathable material 80 is formed It is the gist of what is constituted.

On the other hand, the prior art generally attaches a skin made of natural or artificial leather fabric to the interior material. This type of skin does not give a cushioning feeling, which reduces the tactile feel, as well as a visual design with various patterns on the surface of the skin. The disadvantage is that it cannot be combined.

Document 1: Korean Intellectual Property Office Registered Patent Publication No. 10-0823652 Document 2: Korean Intellectual Property Office Registered Patent Publication No. 10-1459846 Document 3: Korean Intellectual Property Office Registered Patent Publication No. 10-1933915 Document 4: Korean Intellectual Property Office Registered Patent Publication No. 10-1428275

Therefore, it is an object of the present invention to solve the above problems in a mold in which a skin composed of a foam layer providing cushioning force and a fabric layer having an embossed pattern formed thereon is preformed according to the shape of the interior material, and vacuum and heat An object of the present invention is to provide a skin vacuum and thermocompression mold apparatus for automobile interior materials to be compressed.

Another object of the present invention is to provide a skin vacuum and thermocompression mold device for automobile interior materials that allows the skin to be precisely positioned through a reference pin when the skin manufactured in advance according to the shape of the interior material is placed on the interior material. .

Another object of the present invention is to provide a skin vacuum and thermocompression mold device for an automobile interior, which prevents bubbles from occurring on the surface of the ski by simultaneously performing thermocompression bonding and vacuum adsorption in the lower mold.

Another object of the present invention is to install a cam cylinder on the front surface of the upper mold and further install side band cam cylinders on both sides of the upper mold to thermally compress the entire surface of the skin to the interior material. To provide a mold device.

The present invention for achieving the above object is a skin formed in a state in which a skin consisting of a foam layer providing cushioning force and a fabric layer having an embossed pattern formed thereon is molded into a shape corresponding to the curved shape of the upper surface of an automobile interior material. In the automotive interior skin vacuum and thermocompression mold apparatus for adhesive molding on the upper surface of the interior material, the skin is temporarily attached to the interior material in a state where the skin is placed on the interior material in a state in which an adhesive is applied to the upper surface of the interior material. A press device, a lower mold on which the interior material to which the skin is attached is placed, and an upper mold that is located on the upper surface of the lower mold and presses the upper surface of the interior material with the pressing operation of the upper press to press the skin to the upper surface of the interior material. It includes a skin-bonded adhesive press device, wherein a lower mold reference pin is protruded from the lower mold, and an interior material reference pin having an insertion groove for inserting the lower mold reference pin is formed protruding from the interior material, and the skin has the The interior material reference pin insertion portion for inserting the interior material reference pin is formed, and at least one penetratingly formed in the lower mold and sucking air according to the pumping force of the suction pump installed outside, at least one in the interior material It is characterized in that it further comprises a vacuum means formed through the above and configured as a connection hole for adsorbing the skin mounted on the upper surface of the interior material by the pumping force of the suction pump in a state connected to the micropore.

Preferably, hot water circulation passages are formed in the upper mold and the lower mold, respectively.

According to the present invention, a skin composed of a foam layer providing cushioning power and a fabric layer having an embossed pattern formed thereon is pre-formed according to the shape of the interior material and vacuum and thermocompressed in a mold to adhere to the interior material even if the thickness of the skin is thick. It not only enhances the tactile feel through the cushioning power of the ski foam layer, but also various patterns such as embossing of the fabric layer can be used to realize visual design effects.

When the skin molded according to the shape of the interior material is placed on the interior material, the position of the skin can be precisely positioned through the reference pin, and thermocompression bonding and vacuum absorption are performed at the same time to prevent air bubbles from occurring on the surface of the ski. , by installing a cam cylinder and a side band cam cylinder in addition to the lower mold, the entire surface of the skin can be thermocompressed to the interior material.

1A to 1C are views illustrating a process in which a skin is vacuum and thermocompressed to an automobile interior.
Fig. 1D is a partial enlarged view of Fig. 1C;
Fig. 2 is a flow chart showing the operation of Fig. 1;
3 is a side view showing a skin temporary adhesion device in the skin vacuum and thermocompression mold apparatus of the vehicle interior material of the present invention.
4 is a front view showing a skin-bonded bonding device extracted from a skin vacuum and thermocompression mold device for an automobile interior material of the present invention.
Fig. 5 is a side view of Fig. 4;
Fig. 6 is a plan view of Fig. 4;
Fig. 7 is a view showing the mold apparatus extracted from Fig. 4;
Fig. 8 is a side view of Fig. 7;
FIG. 9 is a view specifically showing upper and lower molds and vacuum means in the mold apparatus of FIG. 7 .
Fig. 10 is a view showing a cam cylinder and an inclined surface pad;
11A and 11B are views showing a side band cam cylinder and a side bent surface pad;

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In the detailed description to be described later, representative embodiments of the present invention will be presented in order to achieve the above-described technical problems. And other embodiments that can be presented as the present invention is replaced by the description in the configuration of the present invention.

The skin vacuum and thermocompression mold apparatus for automobile interior materials according to the present invention matches the shape of the interior material 20 with the skin 10 composed of a foam layer 12 providing cushioning force and a fabric layer 14 having an embossed pattern formed thereon. After pre-molding, the molded skin 10 is placed on the interior material 20, and is temporarily bonded in the temporary adhesive press device 130, followed by vacuum and thermocompression in the main adhesive press device 30 to complete the molding. will do

In order to implement the above process, a temporary adhesive press device, a main adhesive press device 30, and a mold device for fixing the interior material on which the skin is placed are essentially required. .

First, as shown in the attached Figure 1a, the skin 10 has a thickness between 3.5T and 4.0T, and is composed of a foam layer 12 providing cushioning force, and a fabric layer 14 having an embossed pattern formed thereon, The foam layer 12 and the fabric layer 14 are adhered to each other through the entire process. In addition, the skin 10 composed of the foam layer 12 and the fabric layer 14 is not in the form of a flat plate, but is molded into a shape corresponding to the shape of the outer surface of the interior material 20 of the vehicle.

That is, the present invention is not a method of attaching the skin to the interior material by placing the fabric itself on the interior material as in the prior art, then pressing with upper and lower molds in a state in which the fabric is stretched by pulling the outer surface of the fabric, but in FIGS. 1A and 1B The skin 10 is preformed according to the curved shape of the upper surface of the interior material 20 as shown, and then the molded skin 10 is temporarily attached to the outer surface of the interior material 20, and is formed by vacuum and thermocompression to form the skin. Since there is no need to attach and elongate the skin 10 separately, it can be adhered to the interior material 20 even when the thickness of the skin 10 is made thick, thus increasing the tactile feel through the cushioning force of the foam layer 12 as well as the fabric layer. Various patterns such as embossing can be used, so that visual design effects can be realized together.

In the skin 10 of the present invention, an aesthetic effect can be further realized by further forming a stitch, which is a sewing line, on the surface of the fabric. When the skin 10 is placed on the interior material 20 by forming the reference pin insertion part 16 for insertion, the skin 10 can be positioned on the surface of the interior material 20 without flow.

Also, as shown in FIG. 1D, a lower mold reference pin 62 is installed on the upper surface of the lower mold 60, which is a mold device on which the interior material 20 is mounted, and the interior material 20 is mounted on the lower mold reference pin 62. The skin 10 and the interior material 20 can be positioned in the lower mold 60 without flow by making them fit into the insertion groove recessed at the bottom of the interior material reference pin 22 of the .

The temporary adhesive press device 130 is a device for temporarily bonding the skin 10 placed on the surface of the interior material 20 by partially pressing it.

3, the temporary adhesive press device 130 is located on the lower die 140 supporting the interior material 10, the upper surface of the lower die 140, and the cylinder 132 is driven It consists of a pressing member 134 installed on the tilting arm 136 for tilting operation and pressing the skin 10 placed on the interior material 20 by driving the cylinder 136 . At this time, an adhesive such as a bond is applied to the surface of the interior material 20 mounted on the temporary adhesive press device 130 in advance, and then the skin 10 is placed thereon.

The main adhesive press device 30 is a device for molding by vacuum and thermocompression of the skin temporarily bonded to the surface of the interior material 20 through the temporary adhesive press device 130 .

4 to 11b, the main adhesive press device 30 includes a lower die 42, a guide post 36 erected vertically along the outer edge of the lower die 42, and the guide post 36 ) is provided with an LM guide 38 installed in the LM guide 38 and an LM block 40 that moves on the LM guide 38 and consists of an upper press 32 that moves up and down with the power of a cylinder 34 .

On the other hand, in the main adhesive press device 30, the skin 10 is pressurized by the pressing operation of the upper press 32 in a state where the interior material 20 to which the skin 10 is temporarily adhered is pressed to perform vacuum and thermocompression bonding. The mold device is installed.

The mold apparatus is largely composed of upper and lower molds 50 and 60 , a cluster cam cylinder 70 and a side band cam cylinder 80 .

The lower mold 60 is fixed to the upper surface of the lower die 42 and is fixed while supporting the interior material 20 to which the skin 10 is attached.

The upper surface of the lower mold 60 is curved to correspond to the shape of the interior material 20 so that the interior material 20 can be in close contact with the upper surface of the lower mold 60 .

A hot water circulation passage 64 is formed in the lower mold 60 . The hot water circulation passage 64 circulates hot water having a predetermined temperature. At this time, as a heat source of hot water circulating in the hot water circulation passage 64, the interior material 20 mounted on the lower mold 60 is heated. Through this, the interior material 20 and the skin 10 are thermocompressed in the process of combining the upper and lower molds 50 and 60, and a strong adhesive effect can be realized.

A vacuum means is further installed in the lower mold 60 . The vacuum means sucks the skin 10 of the interior material 20 mounted on the lower mold 60 in a vacuum to be more firmly attached to the interior material 20 .

The vacuum means connects at least one or more micro-holes 68 penetrating through the lower mold 60, the micro-holes 68, and the suction pump 150 installed outside, and pumps the suction pump 150. It consists of a suction flow path 66 for forcibly sucking air through the micro-holes 68 by operation. At this time, a connection hole 24 that connects and communicates with the micro-hole 68 is also formed through the interior material 20 mounted on the lower mold 60 , so when the suction pump 150 starts to suck air The skin 10 is forcibly adsorbed to the surface of the interior material 20 through the micro-hole 68 of the lower mold 60 and the connection hole 24 of the interior material 20 so that it can be firmly adhered.

The upper mold 50 is fixed to the lower surface of the upper press 50 and presses the skin 10 of the interior material 20 according to the pressing operation of the upper press 50 .

The lower surface of the upper mold 50 is molded into a shape corresponding to the surface of the interior material 20 , and the pressing operation of the upper press 32 evenly presses the entire upper surface of the interior material 20 .

A hot water circulation passage 52 is formed in the upper mold 50 . The hot water circulation passage 52 circulates hot water having a predetermined temperature. At this time, the upper mold 50 is heated as a heat source of hot water circulating in the hot water circulation passage 52 to heat the skin 10 of the interior material 20 . ), a strong adhesive effect can be realized by thermal compression in the process of pressing.

On the other hand, a cam cylinder 70 is installed on the front surface of the upper mold 50 , and an inclined surface pad having a shape corresponding to the inclined surface formed on one side of the front surface of the interior material 20 on the rod of the cam cylinder 70 . (72) is attached.

The inclined surface pad 72 is formed on one front side of the interior material 20 according to the driving of the cam cylinder 70 while the upper mold 50 presses the upper surface of the interior material 20 by the pressing operation of the upper press 32 . The inclined surface portion 24 is separately pressed so that the skin 10 can be adhered even to a portion where the upper mold does not touch.

It is preferable to form a hot water circulation passage 74 in the interior of the inclined surface pad 72 as in the above-described upper and lower molds 50 and 60 so that the skin 10 is thermocompressed to the interior material 20 .

Side band cam cylinders 80 are respectively installed on both sides of the upper press 32 , and side inclined surface pads for attaching skins to both curved surfaces of the interior material 20 on the rod of the side band cam cylinder 80 . (82) is attached.

The side inclined surface pad 82 is a curved surface of both sides of the interior material according to the driving of the side band cam cylinder 80 while the upper mold 50 presses the upper surface of the interior material 20 by the pressing operation of the upper press 32 . is pressed so that the skin 10 can be evenly pressurized and adhered to the entire surface of the interior material 20 .

The hot water circulation passages 52 and 64 are formed inside the side inclined surface pad 82 as in the above-mentioned upper and lower molds 50 and 60, so that the skin 10 is thermocompressed to the interior material 20. desirable.

Hereinafter, a process for molding by bonding the skin to the interior material using the skin vacuum and thermocompression mold apparatus for the interior material of an automobile according to the present invention will be described.

The process of adhesive molding the skin 10 of the automobile interior material of the present invention is divided into a skin molding step (S1), a skin temporary bonding step (S2), and a skin main bonding step (S3).

In the skin forming step (S1), a foam layer 12 providing cushioning force and a fabric layer 14 having an embossed pattern formed thereon are sequentially laminated, and then the foam layer 12 and the fabric layer 14 are pressed. It is a step of forming a shape corresponding to the shape of the upper surface of the vehicle interior material (20). At this time, in the skin 10 composed of the foam layer 12 and the fabric layer 14, the reference pin insertion part 16 for inserting the interior material reference pin 22 formed in the interior material 20 is formed to protrude, Also, on the surface of the fabric layer 14, a stitch having a seam effect is implemented together.

The skin 10 molded in the skin forming step (S1) has a thickness between 3.5T and 4.0T, and through the cushioning force of the foam layer 12, excellent tactile feel can be realized, and the embossing formed on the fabric layer 14 Various visual designs can be implemented together through the pattern of the shape.

In the skin provisional bonding step (S2), the skin 10 composed of the molded foam layer 12 and the fabric layer 14 formed in a shape corresponding to the interior material in the skin forming step (S1), which is the previous step, is applied to the interior material 20. After putting it on the top surface of the, is the step of bonding.

That is, the interior material 20 to which the adhesive is applied is fixed to the die which is a temporary adhesive press device S2, and then the shape corresponding to the upper surface shape of the interior material 20 on the upper surface of the interior material 20 to which the adhesive is applied. to cover the skin 10 molded with

Next, by tilting the pressing member, the skin is partially pressed to temporarily adhere the skin to the upper surface of the interior material.

The skin main bonding step (S3) is a step in which the skin 10, which is temporarily bonded to the upper surface of the interior material through the skin provisional bonding step (S2), which is the previous step, is vacuum and thermocompressed to complete the main bonding.

That is, when the interior material 20 to which the skin is temporarily adhered is placed on the lower mold 60 of the skin-bonded adhesive press device 30, the lower mold reference pin 62 formed in the lower mold 60 is It is inserted into the insertion groove formed on the lower surface of the interior material reference pin 22 of the interior material 20, and the interior material 20 is fixed while being covered with the upper surface of the lower mold 60 without flow.

Next, when the suction pump 150, which is the vacuum means of the lower mold 60, is driven, the skin 10 through the micro-hole 68 of the lower mold 60 and the connection hole 24 of the interior material 20 is inserted into the interior material ( 20), and airtightly adhered to the interior material without generating air bubbles on the surface of the skin 10 during the thermocompression process of the upper and lower molds 50 and 60 through this.

Next, when the upper press 32 is lowered by driving the cylinder 34, the upper mold 50, the cam cylinder 70, and the side band cam cylinder 80 are simultaneously lowered, and in this process, the upper mold 50 ) presses the skin 10, which is attached to the upper surface of the interior material 20, at this time, the cam cylinder 70 and the side band cam cylinder 80 are also driven, and the upper mold 50 is not pressurized. The inclined surface pad 72 and the side bent surface pad 82 are advanced on the inclined surface of the interior material 20 and the curved surfaces of both sides of the interior material 20 to press the entire skin 10 to the interior material 20 .

While the upper mold 50, the inclined surface pad 72, and the side bent surface pad 82 press the skin 10, the upper mold 50, the inclined surface pad 72 and the side curved surface pad 82, and Hot water having a predetermined temperature circulates in the hot water circulation passages 52 , 64 , 74 , 84 formed in the lower mold 60 , and the upper mold 50 , the inclined surface pad 72 and the side bent surface pad 82 . And by heating the lower mold 60, the skin 10 is thermocompressed over the entire upper surface of the interior material 20 and firmly adhered.

10: skin 12: foam layer
14: fabric layer 16: reference pin insertion part
20: interior material 22: interior material reference pin
24: connection hole
30: skin bone adhesive device 32: upper press
50: upper mold 60: lower mold
68: fine hole 70: cam cylinder
80: side band cylinder 130: skin temporary adhesive device

Claims (2)

The skin 10 comprising the foam layer 12 providing cushioning force and the fabric layer 14 having an embossed pattern formed thereon is molded into a shape corresponding to the curved shape of the upper surface of the automobile interior material 20. In the automobile interior skin vacuum and thermocompression mold apparatus for adhesively molding the skin 10 on the upper surface of the interior material 20,
a skin temporary adhesive press device 130 for temporarily adhering the skin 10 on the upper surface of the interior material 20 in a state in which an adhesive is applied to the upper surface of the interior material 20;
a lower mold 60 on which the interior material 20 to which the skin 10 is attached is mounted;
It is located on the upper surface of the lower mold 60 and presses the upper surface of the interior material 20 with the pressing operation of the upper press 50 to press the skin 10 onto the upper surface of the interior material 20. To the upper mold 50 comprising the constituted skin-bone adhesive press device (30);
A lower mold reference pin 62 is formed to protrude from the lower mold 60 , and an interior material reference pin 22 in which an insertion groove for inserting the lower mold reference pin 62 is formed protrudes from the interior material 20 . and an interior material reference pin insertion part 16 for inserting the interior material reference pin 22 is formed in the skin 10;
at least one penetrating through the lower mold 60 and a micro-hole 68 for sucking air according to the pumping force of the suction pump 150 installed outside;
The skin 10 is formed through at least one through the interior material 20 and is placed on the upper surface of the interior material 20 by the pumping force of the suction pump 150 in a state connected to the micro-hole 68. Car interior skin vacuum and thermocompression mold apparatus, characterized in that it further comprises a vacuum means composed of a connection hole (24) for adsorption.
The method of claim 1,
A vacuum and thermocompression mold apparatus for automobile interior materials, characterized in that hot water circulation passages (52, 64) are respectively formed in the upper mold (50) and the lower mold (60).

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