KR102156908B1 - Mold device for an vehicle interior decoration material - Google Patents

Abstract

A support unit supporting the base portion in which the skin portion is wrapped; A pressing unit in close contact with the skin and pressing the skin; Including, wherein the pressing unit is in close contact with the skin portion and a mold apparatus for an interior material for a vehicle in which air at a first temperature is discharged from a front surface of the pressing unit is described.

Description

Mold device for vehicle interior materials {MOLD DEVICE FOR AN VEHICLE INTERIOR DECORATION MATERIAL}

The present invention relates to a mold apparatus for manufacturing a vehicle interior material installed in the interior of the vehicle.

Vehicle interior materials refer to interior products such as instrument panels, door trims, and consoles installed inside a vehicle. The vehicle interior material includes a substrate portion and a skin portion provided on the substrate portion.

The base portion is a solid material having a complex three-dimensional shape, while the skin portion is a flexible flat material such as fabric, leather, and artificial leather.

In the wrapping process of wrapping a complex three-dimensional substrate portion with a skin portion, if the skin portion is not tightly adhered to the substrate portion but is lifted or wrinkled, the entire vehicle interior material is defective.

When the wrapping process or press bonding process is performed, the skin portion is temporarily bonded or adhered to the substrate by the adhesive while the adhesive applied to the skin portion reaches the activation temperature.

The present invention provides a new mold apparatus capable of bonding the skin portion by heating and pressing the skin portion together with the substrate portion.

The mold apparatus of the present invention includes: a support unit for supporting a base portion in which a skin portion is wrapped; A pressing unit in close contact with the skin and pressing the skin; Includes.

The pressurization unit may be in close contact with the skin portion and air at a first temperature may be discharged from the front surface of the pressurization unit.

The pressing unit is in close contact with the skin portion and can pressurize the skin portion. In order to prevent local overheating and to increase the temperature quickly, it adopts a hot air heating structure.

The skin part is heated, but a porous material is used as a special material to prevent local overheating or overpressure of the pressurizing unit.

Since the porous material is entangled with fibers and voids are formed between the fibers, convection and conduction of hot/cold air are combined from the viewpoint of heat transfer to obtain better thermal properties than direct conduction by local contact of the metal surface.

Since the protruding portion of the fibrous skin portion presses the fibrous material to generate local pressure, it is possible to obtain a pressure characteristic in which the local pressure is reduced rather than the local contact of the metal surface.

1 is a perspective view showing a state in which the vehicle interior material of the present invention is mounted.
2 is a cross-sectional view showing an initial state of the mold apparatus of the present invention.
3 is a cross-sectional view showing the final state of the mold apparatus of the present invention.
4 is a perspective view showing another embodiment of the case of the present invention.
5 is a perspective view showing a vortex tube as another embodiment of the blowing unit of the present invention.

With reference to FIGS. 1 to 5 together, the mold apparatus of the present invention will be described in detail.

The mold apparatus of the present invention includes a pressing unit 530 for pressing and heating the skin 120.

The pressurization unit 530 may be made of a porous material through which air can pass. Air is introduced through the rear surface of the pressurizing unit 530, is moved through the pores of a porous material, and may be discharged through the front surface of the pressurizing unit 530.

The base unit 110 made of synthetic resin or metal corresponds to a skeleton mounted in the interior of the vehicle. The skin part 120 is wrapped tightly on the surface of the base part 110 without wrinkles in a state in which a decorative seam 220 such as a stitch or a main seam line 240, which is a concave groove, is formed for an interior function.

The base portion 110 in which the skin portion 120 is wrapped may be supported by the support unit 510. The pressing unit 530 is in close contact with the skin portion 120 and may press the skin portion 120. Air of the first temperature is discharged through the front surface that is in close contact with the skin part 120, and the skin part 120 may be heated.

An adhesive may be applied between the skin part 120 and the base part 110. The adhesive can be activated in an activation temperature range, which is a specific temperature range of 50° C. or more and 90° C. or less. At this time, the adhesion can be favorably increased beyond the set value.

The skin portion 120 that must reach the activation temperature range is heated by the front surface of the pressing unit 530. It is preferable that the temperature of the front surface of the pressurization unit 530 or the first temperature of the air discharged therein falls within the activation temperature range or is higher than the activation temperature.

The skin part 120 is a two-dimensional planar material such as cloth, leather, artificial leather, etc., which is stitched into a three-dimensional shape by following several pieces. The base portion 110 is made in a complex three-dimensional curved shape from the beginning. In order to cover the skin portion 120 having an error on the substrate portion 110 without wrinkles, the skin portion 120 must be faced on the substrate portion 110 and then the edge of the skin portion 120 must be pulled tightly. 120 may be covered on the base portion 110 without wrinkles. This process is a wrapping process.

When the wrapping process is completed, a press bonding process is performed in which the skin part 120 is heated and pressurized as if ironing is performed to completely fix it on the base part 110.

In the wrapping process, the process of peeling and attaching the skin portion 120 to the base portion 110 is repeated several times in order to remove the wrinkles of the skin portion 120. In the wrapping process, only the viscosity of the weak end is sufficient so that the adhesive should not have complete adhesion and only stick properly enough to aid in wrapping.

In the press bonding process, the skin part 120 must be heated so that the adhesive is in the activation temperature range, so that the skin part 120 can be fixed with a complete adhesive force determined as a set value. When the adhesive is in the activation temperature range, it melts and the adhesive component is activated and can exert a predetermined adhesive force. When the adhesive is cooled, it can be completely cured without viscosity. Therefore, it is necessary to heat the pressure unit 530 in the press bonding process.

On the other hand, when the adhesion of the skin part 120 is completed in the press bonding process, the temperature is lowered to inactivate or cure the adhesive, and the completely fixed state of the skin part 120 is maintained.

As an embodiment of the present invention, heating and cooling of the pressing unit 530 must be repeated so that a large number of skin parts 120 can be wrapped and press bonded in a short time.

No matter how the surface shape of the pressure unit 530 is designed to be the same as the three-dimensional shape of the skin part 120, there is a three-dimensional error in the contact surface between the mass-produced skin part 120 and the pressure unit 530 of a certain dimension It is bound to do. This part may be in contact with excessive pressure locally, or heat conduction occurs locally in a state in which it is strongly contacted, causing excessive heating.

For example, when the pressurizing unit 530 is conduction heated with a heater or the like and the skin unit 120 is pressurized, such as when ironing clothes, the local high pressure and heat transfer of the pressurizing unit 530 occurs due to a shape error. As a result, a defect in which the protruding portion of the skin part 120 is bundled may occur.

In the present invention, the skin part 120 is heated in order to reach the activation temperature range of the adhesive, but a porous material is used as a special material so that the pressure unit 530 is not locally overheated or overpressured.

Since the porous material is entangled with fibers and voids are formed between the fibers, convection and conduction of hot/cold air are combined from the viewpoint of heat transfer to obtain better thermal properties than direct conduction by local contact of the metal surface. Since the local pressure will be generated by pressing the fiber in the protruding portion of the fibrous skin 120, a pressure characteristic in which the local pressure is reduced compared to the local contact of the metal surface can be obtained.

In addition, a special material is used to prevent local overheating or overpressure while rapidly increasing or decreasing the heating temperature or pressing force. Since the porous material is not solely conducted by conduction, but passes hot/cold air as a heat transfer medium, rapid heat transfer and overheat prevention properties can be secured.

At this time, the metallic porous material can further improve heat transfer properties. If the fibers forming the pores of the porous material are metallic, it can be advantageous for securing adequate elasticity for preventing local overpressure, rapid heat transfer, preventing excessive heat transfer in local contact parts, durability for high temperature use, and preventing deformation.

Therefore, the pressurizing unit 530 made of a porous material may include at least one component of Fe, Cr, Ni, Mo, C, Si, Mn, P, S, and N. The pressurizing unit 530 made of a porous material may include pores of 10% or more of the total volume. The greater the void ratio, the more advantageous it is to prevent elasticity, convective heat transfer, and local contact pressure. The smaller the void ratio, the more advantageous it is for durability in high temperature use and for preventing deformation.

The pressing unit 530 may be elevated and lowered alternately between the initial position of FIG. 2 and the final position of FIG. 3. As shown in FIG. 3, the pressing unit 530 is in close contact with the skin part 120 and may press the skin part 120. In order to prevent local overheating and to increase the temperature quickly, it adopts a hot air heating structure.

As an embodiment, the exhaust unit 540 may be provided around a surface where the pressure unit 530 is in close contact with the skin unit 120. Air may be discharged through the front side of the pressurizing unit 530 and the exhaust unit 540.

The exhaust unit 540 may adjust the back pressure of the pressurization unit 530, and accordingly, the supply pressure at the rear of the pressurization unit 530 or the discharge pressure at the front of the pressurization unit 530 may be adjusted. For example, when the exhaust unit 540 is closed, the exhaust pressure in the front surface of the pressurization unit 530 may increase.

The discharge pressure or discharge flow rate of the air discharged through the exhaust unit 540 may be adjusted. Accordingly, the discharge pressure or discharge flow rate of the air discharged through the front surface of the pressurizing unit 530 may be adjusted.

As an embodiment, a supply unit 560 for supplying air may be provided. A blower for supplying hot or cold air may be installed in the supply unit 560.

The diffusion unit 520 may be disposed between the supply unit 560 and the pressurization unit 530. The diffusion unit 520 may be a hollow case having the cavity 550 as an empty space, and may diffuse the air supplied from the supply unit 560 to the rear surface of the pressurization unit 530.

The supply unit 560 may supply hot air in the press bonding process and then supply cold air at the point of completion of bonding to quickly complete deactivation or complete curing of the adhesive.

The supply unit 560 may supply air at a second temperature lower than the first temperature in order to cool the pressurization unit 530 after supplying air at the first temperature. The first temperature may belong to or be higher than the activation temperature range of the adhesive. The second temperature may be lower than the activation temperature range and cold air may be supplied.

Rapid heating and cooling can be achieved by a porous material. The air between the voids can be replaced quickly by blowing it out. It may be faster to heat and cool the fibers that are dissipated by the voids than to heat and cool the tight solid material.

Referring to FIG. 4, in order to increase the air flowability of the heating unit, the diffusion unit 520 may be divided into several spaces including a first space 521 and a second space 522. A position where the first space 521 faces the rear surface of the pressing unit 530 and a position where the second space 522 faces the rear surface of the pressing unit 530 may be adjacent to each other. By forming an air flow passage, smooth hot/cold air can be supplied.

For example, the first space 521 may be a passage connecting the supply unit 560 and the rear surface of the heating unit, and may be a passage for supplying hot air. The second space 522 may be a passage connecting the rear surface of the heating unit and the exhaust unit 540, and may be a passage through which air discharged to the front side of the heating unit is smoothly exhausted.

Referring to FIG. 5, a vortex tube may be provided as an embodiment of the supply unit 560. When the compressed air 610 is supplied to the vortex tube, the pressure of the air in the spin chamber 620 is changed to the rotational force of the air, and the rotating air is heated while rubbing against the valve wall, thereby forming a high-temperature vortex 630. This can be used as a hot air source.

When the supplied pressure is converted to the high-temperature vortex 630, a low-temperature vortex 670, which is relatively cold air, is formed by energy conservation, and the low-temperature vortex 670 may be formed inside the high-temperature vortex 630. This can be used as a cold air source.

A vortex tube is provided in the supply unit 560, high-pressure air is supplied to the air inlet 600, and the cold air supply is supplied by switching the low temperature nozzle 660 and the high temperature nozzle 640 toward the diffusion unit 520 You can switch quickly.

The vortex tube includes an air inlet 600 receiving compressed air 610, a high-temperature nozzle 640 in which the compressed air 610 is discharged as high-temperature air 650, and the compressed air 610 is discharged as low-temperature air. A low-temperature nozzle 660 may be provided.

The supply unit 560 may supply hot air 650 to the diffusion unit 520 when heating the pressurization unit 530. The supply unit 560 may supply low-temperature air to the diffusion unit 520 when cooling the pressurization unit 530.

100... interior materials for vehicles 110...
120...skin portion 220...decoration seam
240...main seam line
510...support unit 520...diffusion unit
521...first space 522...second space
530...Pressure unit 540...Exhaust unit
550...cavity 560...supply unit
600...air inlet 610...compressed air
620...spin chamber 630...hot vortex
640...hot nozzle 650...hot air
660...cold nozzle 670...cold vortex

Claims (9)

A support unit supporting the base portion in which the skin portion is wrapped;
A pressing unit in close contact with the skin and pressing the skin;
A supply unit for supplying air;
A diffusion unit disposed between the supply unit and the pressurization unit, and diffusing the air supplied from the supply unit to the rear surface of the pressurization unit;
Including,
The pressurization unit is in close contact with the skin portion and air at a first temperature is discharged from the front surface of the pressurization unit,
The supply unit has a vortex tube,
The vortex tube includes an air inlet receiving compressed air, a high-temperature nozzle through which the compressed air is discharged as hot air, and a low-temperature nozzle through which the compressed air is discharged as low-temperature air,
The supply unit supplies the high temperature air to the diffusion unit when heating the pressurization unit, or supplies the low temperature air to the diffusion unit when cooling the pressurization unit.
The method of claim 1,
An adhesive is applied between the skin part and the base part,
The adhesive is activated in an activation temperature range that is a specific temperature range of 50° C. or more and 90° C. or less,
A mold apparatus in which the temperature of the front surface of the pressurization unit or the first temperature of the air falls within the activation temperature range or is higher than the activation temperature.
The method of claim 1,
The pressure unit is made of a porous material,
The air is introduced through a rear surface of the pressurizing unit, is moved through the pores of the porous material, and is discharged through the front surface of the pressurizing unit.
The method of claim 1,
The pressure unit is made of a porous material,
The pressurizing unit made of the porous material includes at least one component of Fe, Cr, Ni, Mo, C, Si, Mn, P, S, and N, and includes 10% or more voids of the total volume.
The method of claim 1,
And an exhaust unit facing the periphery of a surface in which the pressure unit is in close contact with the skin portion,
The air is discharged through the front surface of the pressurization unit and the exhaust unit,
When the discharge pressure or discharge flow rate of the air discharged through the exhaust unit is adjusted, the discharge pressure or discharge flow rate of the air discharged through the front surface of the pressurization unit is adjusted.
delete The method of claim 1,
An adhesive is applied between the skin part and the base part,
The adhesive is activated in an activation temperature range that is a specific temperature range of 50° C. or more and 90° C. or less,
The supply unit supplies air of a second temperature lower than the first temperature in order to cool the pressurization unit after supplying the air of the first temperature,
The first temperature belongs to or is higher than the activation temperature range,
The second temperature is lower than the activation temperature range. The method of claim 1,
The diffusion unit is divided into a plurality of spaces including a first space and a second space,
A mold apparatus wherein a position where the first space faces a rear surface of the pressing unit and a position where the second space faces a rear surface of the pressing unit are adjacent to each other.
delete

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