KR100337433B1 - Join device and join a method of materials and the scarfskin for interior wallcovering of automobiles - Google Patents

Abstract

The present invention relates to a joining device and a method of joining a substrate for the interior material of the automobile and the skin material, in the past, most of the interior material products that partially adhere the skin material to the surface of the base material or adhere with a two-tone color produced by hand This is because the adhesive area is not smooth and the quality is lowered and the productivity is lowered.

Therefore, the present invention provides a lower mold 20 having a concave portion 22 formed on a molding surface for forming a rib 31 having a predetermined thickness into a bottom surface of the substrate 30 to be injection molded; A pair of first upper mold 10a and a second upper mold 10b separated from each other by the position of the recess 22 in the lower mold 20; In the forming surface between the first and second upper mold (10a) (10b) is variably protruded by the cylinder 70 to form a rim insert groove 32 of the skin material on the rib 31, the skin material Insert rod 60 for inserting into the insertion groove 32; As the cylinder 70 itself for elevating the insert rod 60 and the cylinder 80 for elevating the first upper mold 10a separately from the second upper mold 10b, the present invention is a substrate 30 When the skin material is adhered by using the residual heat of the skin material is well bonded to the substrate 30 by partial adhesion or two-tone color, so the work process is quick and simple, the productivity is improved, and the appearance is beautiful.

Description

Joining device and joining method of materials and the scarfskin for interior wallcovering of automobiles

The present invention relates to a bonding apparatus and a joining method of the interior material and the skin material for automobiles, more specifically the process of forming a substrate by mixing only the advantages of the low-pressure injection method and the advantages of the high-pressure injection method with only a single upper and lower molds The process of adhering the skin material to only a part of the surface of the molded substrate and the molded substrate or bonding two skin materials to each other with two-tone color can be performed well, thereby improving the quality and productivity without the burden of mold equipment cost, thereby significantly reducing the production cost. The present invention relates to a joining apparatus and a joining method for a base material for a car interior and a skin material.

Generally, interior materials for automobiles include door trims, fillers, trunk mats, package trims, and headliners. The interior materials used according to low-priced national cars, compact cars, and medium / large luxury cars are different in their materials and composition. It can be said that it is different.

That is, some models may use interior materials that are injection-molded only with a hard substrate, or interior materials that partially adhere a soft skin material to a part of the surface of the hard substrate, and other vehicles may adhere the skin material to the entire surface of the substrate. The edges may be trimmed together, or a soft skin material may be adhered to the surface of the substrate for better touch, and then the skin edges may be wrapped around the inner surface of the substrate.

The material of the above-mentioned hard base material is PP, POLY-PROPYLENE FELT, POLY-PROPYLENE BOARD, ABS, WOOD STOCK, resin FELT. Soft skin material is mainly used for non-woven fabrics, fabrics, or the back of skin paper made of PVC and the film attached to PE FOAM, PP FOAM, PU FOAM, etc. Doing.

In addition, the injection molding of the base material of the automobile interior material and the method of attaching the skin material include a low pressure injection method and a high pressure injection method. When pressing to form the substrate, high pressure is required.

In other words, the low pressure injection method injects the substrate injection liquid at low pressure into the molding surface of the lower mold with the upper mold open, and puts the skin material on the molding surface and presses with the upper mold with the high pressure press pressure. As the injection liquid is molded into a substrate of a predetermined form, the skin material is bonded to the surface of the substrate to be molded, thereby producing interior materials.

This low-pressure injection method is a good productivity because the base molding and the skin material adhesion is made at the same time. However, when the surface skin paper material of the skin material is fabric or non-woven fabric, and the interior material with a lot of angled stepped parts in the product, the injection material of the base material by the high pressure when pressed with the upper mold with high pressure Since the quality is degraded, such as being seen in several places on the surface of the material, there is a problem that the material is limited.

In addition, the injection liquid of the substrate should be used for the low pressure, because the molding of the substrate can be made smoothly only when the flowability of the substrate itself is good, and the foam layer of the skin material should also use the foam of low magnification, which is expensive. There is a drawback that the production cost is high because it must use the expensive ones.

In addition, when pressing the base material injection liquid into the upper mold and bonding the skin material, a very high press pressure is applied, so the foam layer of the skin material is severely pressed and thinned, and the texture decreases, and the embossed pattern of the surface skin paper is reduced. There is a problem that the quality is not good enough to be used in the medium and large luxury vehicles as a whole, there is a loss of aesthetic sense.

In addition, the low-pressure injection machine as described above is quite expensive (about 2 to 3 billion won), so domestic parts manufacturers producing and supplying various interior materials of automobiles have a considerable cost burden to equip their facilities. .

In addition, the high-pressure injection method injects the substrate injection liquid into the molding surface between the upper and lower molds in a high pressure state, and then cools the substrate first, and then transfers the matured substrate to the skin material adhesion mold and puts the skin material on the substrate. It is a method of gluing at low pressure. In other words, the high-pressure injection method is a method of producing interior materials by the process of first producing the base material and then attaching the skin material in a later process, wherein high pressure is used during injection molding of the base material and low pressure is used when bonding the skin material. .

Since the high pressure injection method presses the skin material at low pressure, the damage of the skin material is less, and the cost of equipment construction is lower than that of the low pressure injection method. However, when the skin material is bonded to the surface of the substrate after spraying the adhesive bond, Since the surface material is adhered by manual work, there is a problem in that workability is poor and productivity is considerably lowered, and the air of the workplace is severely polluted every time the adhesive bond is sprayed, thereby causing a lot of environmental pollution.

In addition, since the high-pressure injection method is to mold the substrate and then completely cure the substrate from the injection mold, the shrinkage (strain) of the substrate is severe, and in particular, the injection mold equipment of the substrate and the adhesive mold equipment of the skin material should be provided separately. Therefore, there is a problem in that it costs a lot and occupies a lot of installation place, and after the base is molded, the base is moved to another mold and the skin is adhered to each other.

In order to solve the above problems, it can be said that it is desirable to carry out the skin material bonding process with the base injection mold. However, the apparatus or method for attaching the skin material in the state that the injection-molded substrate is completely cured only enters the spacers between the upper and lower molds, and compensates only the planar area gap by the thickness of the skin material so that the flat part layer is deformed. However, the upper mold portion forming the edge side vertical portion of the substrate cannot be compensated for the gap as much as the thickness of the skin material, so that the texture of the side portion of the interior material becomes very poor as the foam layer is severely pressed and thinned. .

Therefore, in the related art, a first upper mold for forming a substrate and a second upper mold for attaching a skin material (an upper mold having a side surface gap corrected by the thickness of the skin material) are separately provided on the lower mold for injection of the substrate. When the first mold is combined with the lower mold, and then the skin material is bonded onto the molded substrate, the second mold is bonded to the lower mold so that the skin foam layer on the plane and the side portion is bonded almost uniformly. It was.

However, this is also equipped with two sets of upper molds, the mold cost and equipment cost burden to install alternately operating, and the two upper molds must be moved to work alternately work time takes a long time to reduce productivity There are many problems with the cost increase.

In particular, in the past, in the case of interior products in which a soft skin material is partially adhered to only a part of the surface of a hard substrate or a different skin material is adhered by two-tone color, most of the skin material is adhered to the substrate by manual operation. However, since the center of the substrate and the edges of the skin are not smoothly bonded to each other, the appearance is very unsightly and the quality of the product decreases as the quality deteriorates due to uncleanness such as adhesives buried outside. There was no way to do it.

The present invention is to solve the conventional problems as described above, the object of the present invention is to adhere the skin material only on a portion of the surface of the substrate or to the different skin material by bonding two-tone color a pair of upper and lower molds By combining only the advantages of the low pressure injection method and the advantages of the high pressure injection method alone, it is possible to improve productivity without burden of mold equipment cost, and to achieve cost reduction and quality improvement. To provide.

1 is a cross-sectional view illustrating a state in which the upper and lower molds of the present invention are separated.

Figure 2 is a partial cross-sectional view illustrating a state of high-pressure injection molding the substrate by engaging the upper / lower mold of the present invention.

Figure 3a is a partial cross-sectional view illustrating a state of inserting the skin material on the substrate after opening the first upper mold and the insert rod only in the lower mold of the pair of upper mold in the present invention.

Figure 3b is a partial cross-sectional view illustrating a state of partially bonding the skin material to the injection molded substrate surface in the present invention

Figure 3c is an enlarged cross-sectional view showing a state where the skin material is inserted into the insertion groove of the substrate by Figure 3b

Figure 4a is a partial cross-sectional view illustrating a state of putting the two-tone color skin material on the substrate after opening the first and second upper mold and the insert rod of the present invention in the lower mold.

Figure 4b is a partial cross-sectional view illustrating a state of bonding a two-tone color skin material to the injection molded substrate surface in the present invention

Figure 4c is an enlarged cross-sectional view showing a state in which the two-tone color skin material entered into the substrate by Figure 4b

5 is a partial cross-sectional view illustrating the interior material in which the skin material is partially bonded to the substrate by the present invention.

Figure 6 is a partial cross-sectional view illustrating the interior material in which the skin material of the two-tone color is adhered to the surface of the substrate by the present invention;

Explanation of symbols for the main parts of the drawings

10a, 10b: first and second upper mold 20: lower mold

22: recessed portion 30: description

31: rib 32: insertion groove

40a, 40b: cuticle material 41: edge portion

60: insert rod 70, 80: cylinder

62: bend

Hereinafter, the partial bonding apparatus of the skin material and the joining method thereof, which can effectively achieve the characteristics of the present invention, will be described in detail with reference to the accompanying drawings.

1 is a cross-sectional view illustrating the upper and lower molds of the mold apparatus according to the present invention in an open state, and FIG. 2 illustrates a state of high-pressure injection molding of a substrate by engaging the upper and lower molds of the mold apparatus according to the present invention. As a cross-sectional view of the main part, as shown therein, a high pressure injection molding of the substrate is performed by supplying the injection liquid at a high pressure between the upper and lower molding surfaces while the upper mold of the upper base and the lower mold of the lower base are engaged with each other. Can be said to be the same as the conventional general high pressure injection apparatus.

A feature of the present invention is a rib 31 having a predetermined thickness to the bottom surface of the substrate 30 to be injection-molded at the portion where the edge portion 41 of the skin material 40a to be partially bonded when the substrate is injection molded at a high pressure as described above. ) Is formed on the molding surface of the lower mold 20, and the upper mold corresponding thereto has a pair of first upper molds 10a and the first mold with the position of the recessed portion 22 as a boundary. It is formed by separating into two-phase mold 10b.

In addition, the present invention is installed between the first upper mold (10a) and the second upper mold (10b) by inserting the rod 60, which is elevated by the cylinder 70 to protrude variably from the upper molding surface to the injection molded substrate A cylinder 70 itself and a first upper mold 10a for raising and lowering the insert rod 60 to form the edge inserting groove 32 of the skin material 40a on the rib 31 portion surface of the 30. Is installed so as to be lifted and separated from the second upper mold (10b) by the cylinder (80).

In the drawings, reference numerals 11 and 21 are cooling holes formed in upper and lower molds 10 and 20, 2 is a lower base, and 50 is a nozzle for supplying injection liquid to the molding surface. , 61 is an insert block, and 62 is a bent portion of the insert rod 60 tip. The cylinders 70 and 80 may use any of air, hydraulic, and gas.

In the first embodiment, a process of adhering the skin material only to one surface of the substrate from the process of injection molding the substrate by the apparatus of the present invention thus formed will be described. Referring to the process of bonding as a second embodiment as follows.

First Embodiment (Process of Bonding the Skin Material Only to Substrate Forming and One Surface thereof)

1st process (substrate injection molding process)

As shown in FIG. 1, the pair of insert rods 60 exposed from the upper molding surface toward the lower molding surface is lowered by the cylinder 70 by a predetermined length L1 so that the tip curved portion 62 is positioned lower than the upper molding surface. When the first and second upper molds 10a and 10b of the lower mold 20 are engaged with each other, the tip of the insert rod 60 is positioned in the recess 22 of the lower mold 20.

In this state, when the injection liquid is injected at a high pressure, the substrate 30 is high-pressure injection molded as shown in FIG. 2, and at this time, the lower mold 20 is formed on the rear surface of the substrate 30 on which the insert rod 60 is located. Rib 31 is injection-molded together by the concave portion 22 of the), the insertion groove 32 formed of the insert rod 60 due to such rib 31 is deeply moldable.

Then, after the molding operation as described above, the base surface 30 of the molding surface of the first upper mold 10a and the portion where the insert rod 60 is located is first cooled to a predetermined temperature and the cylinder 80 is operated. To raise the first upper mold 10a and the insert rod 60.

At this time, since the surface of the base 30 of the first upper mold 10a and the insert rod 60 is cooled to some extent, the base 30 does not stick to the molding surface and is easily dropped, and thus the first upper mold 10a and the insert The rod 60 is easily separated from the base 30, and as described above, the first upper mold 10a is opened from the lower mold 20, but the second upper mold 10b is the lower mold 20. Maintaining the state closed as it is, the injection molded substrate 30 is formed with an insertion groove 32 of a predetermined depth.

2nd process (Skin material input process)

When the first upper mold 10a is separated from the substrate 30 of the lower mold 20 as described above, even if the surface of the substrate 30 in the portion is cooled to some extent, a considerable amount of heat of injection remains inside. Therefore, the base material 30 is in a state where it is accumulated by injection residual heat.

In this state, as shown in Figure 3a to put the skin material 40 to be bonded onto the substrate 30, wherein the skin material 40 is such that the leading edge portion 41 is positioned in the insertion groove 32, In particular, when the front edge of the skin material 40 is put in a pre-processed state to face the insertion groove 32, it can be said that it can be easily inserted when the edge portion 41 is inserted into the insertion groove (32).

Third Process (Skin Adhesive Part Bonding Process)

When the skin material 40 is introduced as described above, the cylinder 80 lowers the first upper mold 10a and the insert rod 60 toward the lower mold 20, wherein the insert rod 60 is shown in FIG. Likewise, the cylinder 70 is slightly raised to descend to the state L2 in which the upper portion of the curved portion 62 is coincident with the molding surface.

Then, the first upper mold 10a and the lower mold 20 are completely engaged to attach the skin material 40a to the surface of the substrate 30, and at the same time, the tip of the insert rod 60 is inserted as shown in FIG. 3b. ) Is inserted into the insertion groove 32 of the base material 30 so as to be sandwiched as shown in Fig. 3c. (The state of fitting depending on the skin material is slightly different.),.

At this time, since the injected substrate 30 is in a state where the heat of injection remains, the pressing pressure of the cylinder 80 is lower than the primary press pressure for forming the substrate 30 (substrate material ( 30) the skin material 40a is easily heat-sealed and adhered to the substrate 30 even if the pressure is enough to attach to the substrate 30. Thus, the skin material 40a is lowered at a lower pressure than the primary molding pressure. Since it adheres, there is an advantage that the surface embossed pattern or the foam layer of the skin material 40a is not damaged.

After the adhesion of the skin material 40 is completed, the first and second upper molds 10a and 10b are all raised by the upper base 1 in the state where the entire substrate 30 is completely cooled, and the lower mold ( After removing the substrate 30 from 20) and trimming the edge of the skin material 40a exposed to the outside of the substrate 30, the interior material having the skin material 40a adhered to only one surface of the substrate 30 as shown in FIG. As is completed, the present invention can ideally perform a process of adhering the skin material 40a to only one surface of the high-pressure injection molding of the substrate with a pair of upper and lower molds.

Example 2 (Process of adhering the skin material to the surface with two-tone color after molding the substrate)

1st process (substrate injection molding process)

As shown in FIG. 1, the pair of insert rods 60 exposed from the upper molding surface toward the lower molding surface is lowered by the cylinder 70 by a predetermined length L1 so that the tip curved portion 62 is positioned lower than the upper molding surface. When the injection liquid is injected at a high pressure while the first and second upper molds 10a and 10b and the lower mold 20 are engaged with each other, the lower side of the substrate 30 on which the insert rod 60 is positioned as shown in FIG. The injection molding of the ribs 31 by the recesses 22 of the mold 20 can be said to be the same as in the first embodiment.

The characteristic of the second embodiment is that the first molding process of the base and the substrate 30 of the site where the insert rod 60 is positioned and the entire forming surface of the first and second phase molds 10a and 10b is performed in a subsequent process. In the cooled state, the upper base 1 raises all the cylinders 70 of the first upper mold 10a, the second upper mold 10b, and the insert rod 60 integrally. At this time, since the surface of the substrate 30 in contact with the upper molding surface is cooled to some extent, the substrate 30 does not adhere to the molding surface and is easily detached.

2nd process (Skin material input process)

As described above, when the first upper mold 10a, the insert rod 60, and the second upper mold 10b are separated from the substrate 30 of the lower mold 20, the pressure during the primary molding is released, and the portion thereof is released. Although the surface of the substrate 30 is cooled to some extent as described above, at this time, since a considerable amount of heat of injection remains inside of the substrate 30, the base material 30 is in a state of accumulation due to the residual heat of injection.

In this state, as shown in FIG. 4A, the skin material 40a and 40b of different materials or colors to be adhered onto the substrate 30 is injected, wherein the different skin material 40a and 40b is the base material 30. The tip rim 41 which abuts on the insertion groove 32 of the overlapping part is put in a state of being fused in advance.

Third Process (Tuton Color Skin Bonding Process)

When the skin materials 40a and 40b fused together as described above, the upper base 1 has the first upper mold 10a, the insert rod 60, and the second upper mold 10b as the lower mold 20 The insert rod 60 is also raised to the cylinder 70, as shown in Figure 4a, so that the upper side of the curved portion 62 is lowered to the state (L2) to match the molding surface.

Then, the first upper mold 10a and the second upper mold 10b are completely engaged with the lower mold 20, and the skin 40a and 40b are attached to the surface of the substrate 30 and at the same time the tip of the insert rod 60. As shown in FIGS. 4B and 4C, the overlapping portions of both skin materials 40a and 40b are pushed together into the insertion grooves 32 of the substrate 30.

At this time, the injected substrate 30 is in a state where the heat of injection remains, so that the pressure is lower than the primary press pressure when forming the substrate 30 (the skin material may be attached to the substrate 30). Pressure of a certain degree), even if the press pressure of the first upper mold 10a and the second upper mold 10b is applied, the two-tone color skin material 40a, 40b is easily heat-sealed and adhered to the substrate 30. In this way, since the two-tone color skin materials 40a and 40b are simultaneously bonded at a lower pressure than the primary molding pressure, the work is quick and simple, and the surface embossed pattern or foam layer of the skin materials 40a and 40b is also applied. This has the advantage of being intact.

Then, the first and second phase molds (10a) back to the upper base (1) in the state in which the entire base material 30 is completely cooled after the completion of the adhesion of the different skin materials 40a and 40b with the two-tone color as described above. After raising all 10b and removing the base material 30 from the lower die 20, the interior material to which the two-tone color skin materials 40a and 40b adhered to both sides of the base material 30 is completed as shown in FIG. In this embodiment, the process of forming the base material 30 with a pair of upper and lower molds and attaching the two-tone color skin material 40a and 40b to both surfaces thereof can be ideally performed.

As described above, the present invention bonds the skin material only to a part of the surface of the molded substrate while performing a process of forming the substrate by mixing only the advantages of the low pressure injection method and the advantages of the high pressure injection method with only a single upper / lower mold. Or two-tone color bonding of different skin materials can be performed quickly, easily and precisely, thus improving productivity without burden of mold equipment cost, thereby reducing the production cost and embossing or foaming of the skin material to be bonded. There is not much damage of the floor can provide a very good quality automotive interior materials.

Claims (3)

In the apparatus for high-pressure injection molding the substrate 30 by supplying the injection liquid at a high pressure between the molding surface in the state in which the upper mold and the lower mold 20 are engaged with each other, In the injection molding of the substrate 30, the recessed portion for forming the rib 31 having a predetermined thickness into the bottom of the substrate 30 to be injection-molded at the portion where the edge portion 41 of the skin material 40 to be bonded is located ( A lower die 20 formed on the molding surface; An upper mold separated into a pair of first upper mold 10a and a second upper mold 10b with a boundary line of the recessed part 22 of the lower mold 20; Border of the skin material 40a, 40b on the surface of the rib 31 while being protruded variably by the cylinder 70 at the forming surface between the first upper mold 10a and the second upper mold 10b. An insert rod 60 forming an insertion groove 32 and inserting the skin material into the insertion groove 32; A cylinder 80 for elevating the insert rod 60 and a cylinder 80 for elevating the first upper mold 10a from the second upper mold 10b; Bonding device of the base material and the skin material for the interior of the vehicle, characterized in that consisting of. In the high pressure injection molding of the substrate 30 by supplying the injection liquid at a high pressure between the molding surface in the state in which the upper mold and the lower mold 20 are engaged with each other, In the injection molding of the substrate 30, the insert rod 60 installed at a position corresponding to the position where the front edge of the skin material 40 to be partially bonded is located, and the first and second phase molds 10a separated from the insert rod 60 ( 10b) and a first injection molding process for forming the substrate 30 at a high pressure such that the rib 31 is protruded on the rear surface thereof by forming the edge inserting groove 32 of the skin material by the lower die 20 provided with the recessed portion 22. Process; The first upper mold 10a and the insert rod 60 of the pair of upper molds in which the substrate 30 is formed are opened in the lower mold 20 and then over the insertion groove 32 of the exposed substrate 30. A second step of inserting the skin material 40 such that the leading edge of the skin material 40 to be bonded is positioned; When the separated first upper mold 10a and the insert rod 60 are engaged with the lower mold 20 again, the skin 40 is formed by using the injection heat remaining on the substrate 30. A third step of inserting the front edge of the inserted skin material 40 into the insertion groove 32 of the base material 30 while being thermally fused to the base material 30 at a lower pressure than the pressure; Bonding method of the base material and the skin material for the interior of the vehicle, characterized in that consisting of. The method of claim 2, wherein in the second step of injecting the skin material, the first and second phase molds 10a and 10b in which the base material 30 is formed and the insert rod 60 therebetween are lowered together ( 20) two-tone color skins 40a, 40b of the two-tone color separated from each other and then fused to each other so that the skin material 40a, 40b of the two-tone color is positioned in the insertion groove 32 of the substrate 30; Put it in, In the third process, the first and second phase molds 10a and 10b and the insert rod 60 are engaged again with the lower mold 20 to heat-bond the two-tone color skin material 140a and 140b and their two-tones. Joining method of the interior material and the skin material for the interior of the vehicle, characterized in that to perform the step of inserting the overlapping edge portion 141 of the collar into the insertion groove (32).