KR101306296B1 - Vacuum molding method of interior parts for automobile by olefin resin spray and interior parts for automobile using the same - Google Patents

Abstract

Disclosed are a vacuum molding method for automobile interior parts using an olefinic spray adhesive, and automobile interior parts manufactured accordingly. Automotive interior parts vacuum molding method using the olefin-based spray adhesive of the present invention comprises the steps of heating a plastic molding to be an automotive interior parts and seating the heated plastic molding on the upper side of the lower mold; Applying an olefinic spray adhesive to a skin material bonded to the outside of the plastic molding, and vacuuming the skin material to the inside of the upper mold; Moving the lower mold upward to the upper mold side to mold the upper mold and the lower mold, and vacuum suction the lower mold to bond the skin material to the plastic molding; And taking out the plastic mold to which the skin material is bonded by demolding the upper mold and the lower mold. According to the present invention, by bonding the skin material to the plastic molding forming the automotive interior parts by using an olefinic spray adhesive, it is possible to reduce the bonding process between the plastic molding and the skin material and to simplify the bonding process, and to volatile organic compounds harmful to the human body. (VOCs) and carbon dioxide (CO2) can be prevented to improve the quality of the air inside the car accordingly to provide a vacuum molding method for automotive interior parts using an olefin-based spray adhesive that can maintain a comfortable indoor environment do.

Description

Vacuum molding method for automobile interior parts using olefinic spray adhesive and automobile interior parts manufactured according to the present invention {Vacuum molding method of interior parts for automobile by olefin resin spray and interior parts for automobile using the same}

The present invention relates to a vacuum molding method for automobile interior parts using an olefinic spray adhesive, and to automotive interior parts manufactured accordingly. More specifically, the plastics forming the interior parts for automobiles using an olefinic spray adhesive By bonding the skin material to the molding, it is possible to reduce the bonding process between the plastic molding material and the skin material and to facilitate the bonding process, and to prevent the generation of volatile organic compounds (VOCs) and carbon dioxide (CO2), which are harmful to the human body, to improve the quality of the air inside the car. The present invention relates to a vacuum molding method for automobile interior parts using an olefinic spray adhesive which can improve and thus maintain a comfortable indoor environment, and a vehicle interior part manufactured accordingly.

In general, a car is a means of transport that generates power from its engine and transmits it to wheels to carry passengers or cargo on the road.

Automobiles are made of metal frames that form the body, and crash pads, console boxes, door trims, and various trims that are molded by using plastic raw materials to enhance the safety of people riding on the cars and to enhance the aesthetics of the interior. It consists of various types of interior parts such as.

In the case of interior parts, in order to make the appearance more beautiful, the surface of the plastic molding itself constituting it is corroded, or a material such as cloth or a skin material such as a synthetic resin sheet is attached to the outside of the plastic molding.

The plastic molding is prepared by using a plastic raw material such as PP, ABS, etc. so as to be easily melted and injected in an injection molding machine, and the skin material is provided by attaching a thin sheet provided with a synthetic resin to the outside of the plastic molding.

Meanwhile, in order to manufacture automotive interior parts in which a plastic molding and a skin material are adhered to each other, a side plastic to which the skin material is bonded after a hydrophilic reinforcement flame treatment or a plasma or corona treatment to bond the skin material to the plastic molding Apply water-soluble or organic solvent-type adhesive to the surface of the molded product by spraying, and then dry the adhesive by heating it to a certain temperature while passing the plastic molded product through an oven or a heater, and apply primer to the surface of the plastic molding side skin. The coating material was applied to an oven or a heater while passing through it, followed by a method of drying the primer by heating to a constant temperature.

On the other hand, the plastic molding and the skin material are formed in the semi-finished state.The plastic molding is placed on the lower mold to be seated, and the skin material is heated to a predetermined temperature in a heater, placed between the upper mold and the lower mold, and then adhered to the upper mold by vacuum suction process. When the upper mold and the lower mold are combined and vacuum sucked from the lower mold to bond the plastic molding and the skin material, the plastic material is adhered to the plastic molding by the adhesive of the plastic molding and the primer of the skin material.

When the skin material is adhered to the plastic molding, the upper mold and the lower mold are moved in the vertical direction to separate the upper mold and the lower mold, and the molding of the automotive interior parts is completed by taking out the plastic molding to which the skin material is bonded.

However, the conventional molding method of the interior parts is a process of pre-processing the plastic molding before the adhesive is applied to the plastic molding in the process of adhering the plastic molding and the skin material, that is, processing such as flame treatment, plasma treatment or corona, and adhesive In the process of applying and drying it, and in the process of applying the primer to the skin material, it requires a lot of manpower and time loss. As a result, the work efficiency is reduced, the product cost is increased, and the adhesive and primer are applied. There is a problem that a large amount of harmful substances and carbon dioxide (CO ₂ ) is generated in the work process.

In addition, since the adhesive is scattered in the process of spraying the adhesive to the plastic molding, it is more likely that the worker will directly inhale the scattered adhesive, and as the worker inhales the scattering agent harmful to the human body, There is a problem such as impaired health.

In addition, the water-soluble or organic solvent-type adhesive applied to the plastic molding and the primer applied to the skin material contain a large amount of volatile organic compounds, which is very harmful to the human body, and in particular, toluene, xylene, etc. The substance has a problem that is the main cause of deterioration of the air quality of the car interior.

An object of the present invention is to reduce the bonding process between the plastic molding and the skin material by using a spray adhesive using an olefin resin when bonding the skin material to the plastic molding constituting the interior parts of the automobile, and to facilitate a simple bonding process, Vacuum molding of automotive interior parts using olefinic spray-type adhesives that can improve the quality of air inside the car and thereby maintain a comfortable indoor environment by preventing generation of volatile organic compounds (VOCs) and carbon dioxide (CO2), which are harmful to the human body It is to provide a method and a vehicle interior manufactured accordingly.

The object is, according to the present invention, the step of heating the plastic molding to be a vehicle interior parts and seating the heated plastic molding on the upper side of the lower mold; Applying an olefinic spray adhesive to a skin material bonded to the outside of the plastic molding, and vacuuming the skin material to the inside of the upper mold; Moving the lower mold upward toward the upper mold to coalesce the upper mold and the lower mold, and vacuum suction the lower mold to bond the skin material to the plastic molding; And extracting the plastic molding to which the skin material is bonded by demolding the upper mold and the lower mold, thereby achieving the interior of the automotive interior vacuum forming method using an olefinic spray adhesive.

The skin material may include a first sheet layer formed of any one material of polyvinyl chloride or thermoplastic polyolefin; And a second sheet layer formed of a polypropylene material and bonded to a lower surface of the first sheet layer.

Vacuum absorbing the skin material inside the upper mold may include applying the olefinic spray adhesive to the rear surface of the second sheet layer; Heating the skin material to which the olefinic spray adhesive is applied; Placing the heated skin material between the upper mold and the lower mold; And vacuum sucking the upper mold such that the skin material is adsorbed inside the upper mold.

The object is, according to the present invention, the step of heating the plastic molding to be a vehicle interior parts and seating the heated plastic molding on the upper side of the lower mold; Applying an olefinic spray adhesive to a skin material bonded to the outer side of the plastic molding, and vacuuming the lower mold so that the skin material is adsorbed on the upper surface of the plastic molding; Moving the upper mold provided in a direction opposite to the lower mold downward to the lower mold to coalesce the upper mold and the lower mold, and vacuum suction the upper mold to bond the skin material to the plastic molding; And removing the plastic mold to which the skin material is bonded by demolding the upper mold and the lower mold, thereby achieving the automotive interior vacuum forming method using an olefinic spray adhesive.

The skin material may include a first sheet layer formed of any one material of polyvinyl chloride or thermoplastic polyolefin; And a second sheet layer formed of a polypropylene material and bonded to a lower surface of the first sheet layer.

The step of allowing the skin material to be adsorbed on the upper surface of the plastic molding, the step of applying the olefin-based spray adhesive on the back of the second sheet layer; Heating the skin material to which the olefinic spray adhesive is applied; Placing the heated skin material between the upper mold and the lower mold; And vacuum sucking the lower mold such that the skin material is adsorbed onto the upper surface of the plastic molding.

The heating of the skin material coated with the olefinic spray adhesive may include heating the skin material coated with the olefinic spray adhesive within a range of 10 ° C. to 110 ° C. in a heater.

The step of applying the olefinic spray-type adhesive to the skin material bonded to the outside of the plastic molding, the skin material is disposed on the upper surface of the die of the spray coating type coating machine so that the back surface of the second sheet layer faces upward Making; Disposing the nozzle of the spray application coater adjacent to a rear surface of the second sheet layer; And allowing the olefinic spray adhesive to be evenly applied to the rear surface of the second sheet layer by rotating the conveyor roller and allowing the die to move while simultaneously spraying the olefinic spray adhesive from the nozzle. Can be.

The above object is also achieved by an automotive interior component manufactured according to the above-described vacuum molding method for automotive interior parts using the olefinic spray adhesive described above.

According to the present invention, by bonding the skin material to the plastic molding forming the automotive interior parts by using an olefinic spray adhesive, it is possible to reduce the bonding process between the plastic molding and the skin material and to simplify the bonding process, and to volatile organic compounds harmful to the human body. By preventing the generation of (VOCs) and carbon dioxide (CO2), it is possible to improve the quality of the air inside the car, thereby maintaining a comfortable indoor environment.

1 is a flow chart of a vacuum forming method for a car interior parts using an olefinic spray adhesive according to an embodiment of the present invention.
Figure 2 is a flow chart of the step of vacuum-sucking the skin material of the vacuum coating method for automotive interior parts using the olefinic spray-type adhesive of Figure 1 inside the upper mold.
3 to 8 are schematic schematic diagrams showing the principle of the vacuum molding method for automotive interior parts using the olefinic spray adhesive of FIG.
FIG. 9 is a schematic view of automotive interior parts manufactured according to the vacuum molding method for automotive interior parts using the olefinic spray adhesive of FIG. 1.
10 is a flow chart of a vacuum forming method for a car interior parts using an olefinic spray adhesive according to another embodiment of the present invention.
FIG. 11 is a flowchart illustrating a step of allowing the skin material of the vacuum coating method for automobile interior parts using the olefinic spray adhesive of FIG. 10 to be adsorbed on the upper surface of the plastic molding.
12 to 17 is a schematic diagram showing the principle of the vacuum coating method for interior automotive parts using the olefinic spray adhesive of FIG.
FIG. 18 is a schematic view of automotive interior parts manufactured by the vacuum molding method for automotive interior parts using the olefinic spray adhesive of FIG. 10.
19 is a cross-sectional view of the automotive interior component of FIGS. 9 and 18.
20 is a schematic diagram showing the principle of applying an olefinic spray adhesive to the back surface of the second sheet layer.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description of the present invention, the well-known functions or constructions are not described in order to simplify the gist of the present invention.

1 is a flow chart of a vacuum coating method for automotive interior parts using an olefinic spray adhesive according to an embodiment of the present invention, Figure 2 is a vacuum molding method for automotive interior parts using an olefinic spray adhesive of Figure 1 Figure 3 is a flow chart of the step of vacuum adsorption on the inside of the upper mold, Figures 3 to 8 is a schematic schematic diagram showing the principle of the vacuum forming method for automotive interior parts using the olefin-based spray adhesive of Figure 1, Figure 9 1 is a schematic diagram of automotive interior parts manufactured according to the vacuum molding method for automotive interior parts using the olefinic spray adhesive of FIG. 1.

Referring to these drawings, the automotive interior parts vacuum molding method (hereinafter referred to as "automobile interior parts vacuum molding method") using an olefinic spray-type adhesive according to an embodiment of the present invention is a vehicle interior parts Heating the plastic molding and placing the heated plastic molding on the upper side of the lower mold (S1), applying an olefinic spray adhesive to the skin material bonded to the outside of the plastic molding, and coating the skin material inside the upper mold. Vacuum suction step (S2), and move the lower mold upward to the upper mold side to mold the upper mold and the lower mold, and vacuum suction the lower mold to bond the skin material to the plastic molding (S3), the upper mold and Demolding the lower mold to take out the plastic molding to which the skin material is bonded (S4).

Heating the plastic molding to be an automotive interior part and mounting the heated plastic molding on the upper side of the lower mold (S1), as shown in Figure 3, molding the automotive interior parts 100, such as a door trim, etc. In order to form the plastic molding 10 constituting it in order to injection or press molding, such as by heating and seating on the upper side of the lower mold 40, the olefin-based spray on the skin material bonded to the outside of the plastic molding Applying the mold adhesive, and the step (S2) to vacuum the skin material inside the upper mold, as shown in Figure 4 and 5, the skin material (bonded to the outer surface (surface) of the plastic molding 10 ( 20 is a step of applying the olefin-based spray adhesive 23 on the lower surface and vacuum-adsorbed to the inside of the upper mold (30).

Here, the skin 20 is a kind of sheet bonded to the outside of the plastic molding 10 in order to make the exterior of the automotive interior part 100 beautiful, and the first sheet layer 21 located on the interior side of the automobile and And a second sheet layer 22 bonded to the lower surface of the first sheet layer 21 (see FIG. 19).

The first sheet layer 21 is made of any one of polyvinyl chloride (PVC) or thermoplastic polyolefin (TPO: Thermo Plastic-Olefin), and the second sheet layer 22 is made of polypropylene ( It is prepared using PP FOAM made of PP: Polypropylene. Of course, the materials of the first sheet layer 21 and the second sheet layer 22 may be changed as necessary, and the scope of the present invention is not limited by the materials of the sheet layers 21 and 22.

On the other hand, applying the olefinic spray-type adhesive to the skin material bonded to the outside of the plastic molding, and the step (S2) for vacuum adsorption of the skin material inside the upper mold (S2) again, the olefinic spray type on the back of the second sheet layer Applying the adhesive (S21), heating the skin material coated with the olefinic spray adhesive (S22), disposing the heated skin material between the upper mold and the lower mold (S23), and the skin And vacuum suctioning the upper mold so that ash is adsorbed inside the upper mold.

Applying the olefinic spray adhesive on the back surface of the second sheet layer (S21), the olefinic layer on the back surface of the second sheet layer 22, which is a bonding surface to which the skin material 20 is bonded to the plastic molding 10 It is a step of applying the spray adhesive 23 evenly.

This step (S21) is, again, the step of disposing the skin material on the upper surface of the die of the spray coating method coating machine so that the back side of the second sheet layer, the nozzle of the spray coating method coating machine of the second sheet layer Arranging adjacent to the back, and allowing the olefinic spray adhesive to be sprayed from the nozzle and simultaneously rotating the conveyor roller so that the die moves so that the olefinic spray adhesive is evenly applied to the back of the second sheet layer. It is configured to include.

That is, in order to apply the olefinic spray-type adhesive 23 to the back of the second sheet layer 22, the back of the second sheet layer 22 is first placed on the top surface of the die C1 of the spray coating method coater C. The skin 20 is placed so that it faces, and then the robot arm C4 is moved so that the nozzle C2 of the spray coating coater C is adjacent to the rear surface of the second sheet layer 22. By supplying the olefinic spray adhesive 23 to the nozzle C2 and simultaneously rotating the conveyor roller C3, the die C1 is moved slowly so that the olefinic spray adhesive 23 is the second sheet layer 22. It is to be evenly applied to the back of the () (see Figure 20).

Of course, the spray coating method (C) is not necessarily used in this step (S21), if necessary, various equipment that can be replaced within the range that the olefin-based spray adhesive 23 is not scattered may be used.

Meanwhile, in step S22 of heating the skin material coated with the olefinic spray adhesive, as illustrated in FIG. 4, the skin material 20 coated with the olefinic spray adhesive 23 is applied to the heater 50. It is a step of increasing the bonding strength between the plastic molding 10 and the skin material 20 by heating to 10 ℃ to 110 ℃ through, and the step of placing the heated skin material between the upper mold and the lower mold (S23) is the previous step (S22) The skin material 20 heated through the) is disposed between the upper mold 30 and the lower mold 40, the step of vacuum suction the upper mold so that the skin material is adsorbed inside the upper mold (S24) 5, the upper mold 30 by moving the upper mold 30 downward to the skin material 20 side by sucking the air through the upper vacuum hole 31 formed in the upper mold 30 and The skin material 20 disposed between the lower mold 40 moves to the inside of the upper mold 30. As a step for adsorbing to a vacuum.

Meanwhile, the step (S3) of moving the lower mold upward to the upper mold side to mold the upper mold and the lower mold, and vacuum sucking the lower mold to bond the skin material to the plastic molding, as shown in FIGS. 6 and 7. The upper mold 30 and the lower mold 40 are combined to move the lower mold 40 upward to the upper mold 30, and the air is sucked through the lower vacuum hole 41 formed in the lower mold 40. By doing so, the plastic molding 10 and the skin material 20 are pressed to be bonded.

That is, the olefinic spray adhesive 23 applied to the skin 20 in this step S3 is melted by the heated plastic molding 10 while the plastic molding 10 and the skin 20 are bonded to each other. As the air is continuously sucked through the lower vacuum hole 41, the plastic molding 10 and the skin material 20 are compressed to each other, thereby making a strong coupling between the two.

Finally, the step (S4) of removing the upper mold and the lower mold to remove the plastic molding to which the skin material is bonded is performed, after the bonding of the plastic molding 10 and the skin material 20 is completed, as shown in FIG. 8. The upper mold 30 is moved upward and the lower mold 40 is moved downward to demold the molded molds 30 and 40 and to take out the finished interior parts 100.

Since the interior material 100 taken out according to the step S4 is completely bonded to the plastic molding 10 by the olefinic spray type adhesive 23, as shown in FIG. 9. Between the plastic molding 10 and the skin 20, a thin layer of olefinic spray type adhesive 23 is formed.

In the vacuum coating method for automotive interior parts of the present embodiment, the plastic molding 10 is bonded by bonding the skin material 20 to the plastic molding 10 constituting the automotive interior parts 100 using the olefinic spray adhesive 23. ), While reducing the bonding process between the outer skin and the skin 20, and promoting a simple bonding process, by preventing the generation of volatile organic compounds (VOCs) and carbon dioxide (CO2) harmful to the human body to improve the quality of the air inside the car accordingly Has the advantage of maintaining a comfortable indoor environment.

10 is a flow chart of a vacuum coating method for automotive interior parts using an olefinic spray adhesive according to another embodiment of the present invention, Figure 11 is a vacuum molding method for automotive interior parts using the olefinic spray adhesive of Figure 10 12 is a schematic diagram illustrating the principle of the vacuum molding method for automobile interior parts using the olefinic spray adhesive of FIG. 10. FIG. Fig. 10 is a schematic diagram of automotive interior parts manufactured according to the vacuum molding method for automobile interior parts using the olefinic spray adhesive of Fig. 10.

Referring to these drawings, the automotive interior vacuum component forming method according to the present embodiment, the step of heating the plastic molding to be the automotive interior parts and seating the heated plastic molding on the upper side of the lower mold (S1), and the plastic Applying an olefinic resin adhesive to the skin material bonded to the outer side of the molding, and vacuum suction the lower mold so that the skin material is adsorbed on the upper surface of the plastic molding (S2), and the upper portion provided in a direction opposite to the lower mold The mold is moved downward to the lower mold side to mold the upper mold and the lower mold, and the upper mold is vacuum sucked so that the skin material is bonded to the plastic molding (S3), and the upper mold and the lower mold are demolded so that the skin material is bonded. It takes out the molding (S4).

The step (S1) of heating the plastic molding to be an automotive interior part and seating the heated plastic molding on the upper side of the lower mold (S1) heats the plastic molding to be an automotive interior part of the above-described embodiment and heats the heated plastic molding to the lower mold. Since it is substantially the same as the step (S1) to be seated on the upper side of the overlapping description will be omitted.

The step (S2) of applying the olefinic resin adhesive to the outer skin material bonded to the outer side of the plastic molding and suctioning the lower mold under vacuum to allow the outer skin material to be adsorbed on the upper surface of the plastic molding is illustrated in FIGS. 13 and 14. As described above, the olefinic spray adhesive 23 is applied to the lower surface of the skin material 20 bonded to the outer side (surface) of the plastic molding 10 and adsorbed onto the upper surface of the plastic molding 10.

This step (S2) is again, the step of applying an olefinic resin adhesive on the back of the second sheet layer (S21), the step of heating the skin material coated with the olefinic resin adhesive (S22) and heated Disposing the skin material between the upper mold and the lower mold (S23), and vacuum suction the lower mold (S24) so that the skin material is adsorbed on the upper surface of the plastic molding.

Applying an olefinic resin adhesive to the back surface of the second sheet layer (S21), heating the skin material coated with the olefinic resin adhesive (S22), and heating the skin material between the upper mold and the lower mold. Disposing step (S23), respectively, the step of applying the olefinic resin adhesive on the back of the second sheet layer of the above-described embodiment (S21), the step of heating the skin material coated with the olefinic resin adhesive (S22) And since the heated skin material is substantially the same as the step (S23) disposed between the upper mold and the lower mold and overlapping description is omitted.

Vacuum suction of the lower mold such that the skin material is adsorbed on the upper surface of the plastic molding (S24), as shown in Figure 14, after moving the lower mold 40 to the skin material 20 side lower mold 40 The skin 20 is sucked to the lower mold 40 by sucking air through the lower vacuum hole 41 formed in the lower mold 40 to be bonded to the plastic molding 10.

Meanwhile, the upper mold provided in the direction opposite to the lower mold is moved downward to the lower mold side to mold the upper mold and the lower mold, and the upper mold is vacuum sucked so that the skin material is bonded to the plastic molding (S3) and the upper mold. And taking out the plastic molding to which the skin material is bonded by demolding the lower mold (S4), respectively, by moving the lower mold upward to the upper mold side to mold the upper mold and the lower mold, and vacuum sucking the lower mold. Since the skin material is bonded to the plastic molding (S3) and the upper mold and the lower mold are demolded to remove the plastic molding to which the skin material is bonded, the overlapping description is omitted.

Since the interior material 100 taken out according to this step S4 is completely bonded to the plastic molding 10 by the olefinic spray type adhesive 23, as shown in FIG. 18. Between the plastic molding 10 and the skin 20, a thin layer of olefinic spray type adhesive 23 is formed.

In the vacuum coating method for automotive interior parts of the present embodiment, the plastic molding 10 is bonded by bonding the skin material 20 to the plastic molding 10 constituting the automotive interior parts 100 using the olefinic spray adhesive 23. ), While reducing the bonding process between the outer skin and the skin 20, and promoting a simple bonding process, by preventing the generation of volatile organic compounds (VOCs) and carbon dioxide (CO2) harmful to the human body to improve the quality of the air inside the car accordingly Has the advantage of maintaining a comfortable indoor environment.

In addition, unlike the above-described embodiment, in the vacuum molding method for automobile interior parts of the present embodiment, the skin 20 is first bonded to the upper surface of the plastic molding 10 to a certain degree, and thus, it is possible to compress the work for convenience. It becomes possible.

That is, in the vacuum molding method for the interior parts of automobiles of the present invention, the skin 20 may be first adsorbed to the inside of the upper mold 30 or may be first bonded to the upper surface of the plastic molding 10 in order to suit the working environment. By doing so, the work can be facilitated.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It is obvious to those who have. Accordingly, it should be understood that such modifications or alterations should not be understood individually from the technical spirit and viewpoint of the present invention, and that modified embodiments fall within the scope of the claims of the present invention.

10: plastic molding 20: skin material
21: first sheet layer 22: second sheet layer
23: olefinic spray adhesive 30: upper mold
31: upper vacuum hole 40: lower mold
41: lower vacuum hole 50: heater
100: interior parts

Claims (9)

Heating a plastic molding to be an automotive interior part and seating the heated plastic molding on an upper side of a lower mold;
Applying an olefinic spray adhesive to a skin material bonded to the outside of the plastic molding, and vacuuming the skin material to the inside of the upper mold;
Moving the lower mold upward toward the upper mold to coalesce the upper mold and the lower mold, and vacuum suction the lower mold to bond the skin material to the plastic molding; And
Demolding the upper mold and the lower mold to take out the plastic molding to which the skin material is bonded;
The skin material may include a first sheet layer formed of any one material of polyvinyl chloride or thermoplastic polyolefin; And a second sheet layer formed of a polypropylene material and bonded to a lower surface of the first sheet layer.
The step of applying the olefinic spray-type adhesive to the skin material bonded to the outside of the plastic molding, the skin material is disposed on the upper surface of the die of the spray coating type coating machine so that the back surface of the second sheet layer faces upward Doing; Disposing the nozzle of the spray application coater adjacent to a rear surface of the second sheet layer; And allowing the olefinic spray adhesive to be evenly applied to the rear surface of the second sheet layer by rotating the conveyor roller and allowing the die to move while simultaneously spraying the olefinic spray adhesive from the nozzle. Automotive interior vacuum forming method using an olefin-based spray adhesive, characterized in that. delete The method of claim 1,
Vacuum absorbing the skin material inside the upper mold,
Applying the olefinic spray adhesive to the back surface of the second sheet layer;
Heating the skin material to which the olefinic spray adhesive is applied;
Placing the heated skin material between the upper mold and the lower mold; And
And vacuum suction the upper mold such that the skin material is adsorbed on the inside of the upper mold. Heating a plastic molding to be an automotive interior part and seating the heated plastic molding on an upper side of a lower mold;
Applying an olefinic spray adhesive to a skin material bonded to the outer side of the plastic molding, and vacuuming the lower mold so that the skin material is adsorbed on the upper surface of the plastic molding;
Moving the upper mold provided in a direction opposite to the lower mold downward to the lower mold to coalesce the upper mold and the lower mold, and vacuum suction the upper mold to bond the skin material to the plastic molding; And
Demolding the upper mold and the lower mold to take out the plastic molding to which the skin material is bonded;
The skin material may include a first sheet layer formed of any one material of polyvinyl chloride or thermoplastic polyolefin; And a second sheet layer formed of a polypropylene material and bonded to a lower surface of the first sheet layer.
The step of applying the olefinic spray-type adhesive to the skin material bonded to the outside of the plastic molding, the skin material is disposed on the upper surface of the die of the spray coating type coating machine so that the back surface of the second sheet layer faces upward Doing; Disposing the nozzle of the spray application coater adjacent to a rear surface of the second sheet layer; And allowing the olefinic spray adhesive to be evenly applied to the rear surface of the second sheet layer by rotating the conveyor roller and allowing the die to move while simultaneously spraying the olefinic spray adhesive from the nozzle. Automotive interior vacuum forming method using an olefin-based spray adhesive, characterized in that. delete 5. The method of claim 4,
The step of allowing the skin material to be adsorbed on the upper surface of the plastic molding,
Applying the olefinic spray adhesive to the back surface of the second sheet layer;
Heating the skin material to which the olefinic spray adhesive is applied;
Placing the heated skin material between the upper mold and the lower mold; And
And vacuum suction the lower mold such that the skin material is adsorbed on the upper surface of the plastic molding. The method according to claim 3 or 6,
The heating of the skin material coated with the olefinic spray adhesive may include heating the skin material coated with the olefinic spray adhesive within a range of 10 ° C. to 110 ° C. in a heater. Vacuum forming method for automotive interior parts using an olefinic spray adhesive. delete An automotive interior part manufactured according to the method of claim 1.

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