KR100419101B1 - Forming device for wallboard of vehicle - Google Patents

Abstract

The present invention relates to a molding apparatus for automotive interior materials, and in order to produce interior materials with only a hard base material and a skin material, each mold apparatus must be separately provided, so that a lot of mold equipment costs are required. In many cases, the edges of the skin were not attached cleanly and the quality was poor.

Therefore, in the present invention, the guide hole 21 is formed at the site where the fabric pattern skin material 31 is to be placed, and the movable mold 20b having the same shape as the skin material 31 is formed in the guide hole 21. A lower die 20a installed to be elevated by lifting means 23, such as a cylinder; An upper mold 10 having a protrusion 11 formed at a portion of the molding surface; A first injection nozzle 40a and a second injection nozzle 40b for supplying injection liquid to the molding space of the lower mold 20a and the movable mold 20b, respectively; In the mold apparatus for high-pressure injection molding of the substrate by means of, when the protrusion 11 is formed on the molding surface of the upper mold 10, the protrusion 11 corresponds to the edge on the edge of the movable mold 20b. Formed to form a set of injection molds to be able to selectively mold the interior material and the interior material of the hard substrate attached to the skin material, can significantly reduce the cost of the mold can be achieved a significant cost savings.

Description

Forming device for automobile interiors {Forming device for wallboard of vehicle}

The present invention relates to a molding apparatus for automobile interior materials, and more particularly, to select a high-quality interior material product in which a skin pattern of a fabric pattern is adhered to a part of a substrate and a interior material product formed by using only a hard substrate with only a single high-pressure injection mold. The present invention relates to a molding apparatus for automobile interior materials that can reduce production cost and improve productivity by reducing production cost and improving productivity.

Generally, interior materials for automobiles include door trims, fillers, trunk mats, package trims, and headliners. These interior materials are mainly composed of a hard base material and a soft skin material, and the material of the hard base material is PP (PP). ), PP PP (POLY-PROPYLENE FELT), PP Board (POLY-PROPYLENE BOARD), ABS, WOOD STOCK, RESIN FELT, etc. are mainly used. Alternatively, a skin paper made of PVC and a backing paper such as PE FOAM, PP FOAM, and PU FOAM are mainly used.

In addition, the injection molding of the base material of the automotive interior material and the skin material of the fabric pattern is a low-pressure injection method and a high-pressure injection method, of which the low pressure injection method is a low pressure when injecting the base material injection liquid while the skin material High pressure is required when the base material is formed by pressing and pressing with an upper mold.

In other words, the low pressure injection method puts the skin material on the molding surface of the lower mold with the upper mold open and injects the substrate injection liquid at low pressure and presses the upper mold with the high pressure press pressure. It is a method of producing an interior material by the process of allowing the skin material to be bonded to the surface of the substrate to be molded while being molded into a predetermined type of substrate.

In this low pressure injection method, the pressurization of the high pressure is applied when the substrate injection liquid is pressed into the upper mold to form the adhesive. Therefore, as the foam layer of the skin material is pressed hard and thin, the texture is deteriorated. Since the embossing pattern is lost in several places, the aesthetics are deteriorated, so there is a problem that the quality of the embossing pattern is poor enough to be used in the medium and large luxury vehicles.

In addition, the low pressure injection liquid should have good flowability, so that the molding of the substrate can be performed smoothly. Therefore, the use of expensive low pressure should be used, and the foam layer of the skin material should also use a low-magnification foam, which is expensive. There are many factors that raise production costs, such as the use of increasing expensive ones, and such low pressure injection equipments are quite expensive (about 2 ~ 3 billion won), so domestic parts manufacturers that produce and supply various interior materials There is a significant cost burden to have.

In the high pressure injection method, injection of the substrate injection liquid into the molding surface between the upper and lower molds is carried out at high pressure to cool the substrate first, and then the matured substrate is transferred to the skin coating mold and the fabric pattern is placed on the substrate. It is a method of putting on the outer skin material and bonding by low press pressure. In other words, the conventional high-pressure injection device is a method of producing the substrate first and then attaching the skin material in a post-process to produce interior materials, the high pressure is used during the injection molding of the substrate and the low pressure is used when bonding the skin material. The damage of ash is low and the cost of mold equipment is lower than that of low pressure injection equipment.

However, in the conventional high pressure injection apparatus, since the mold matured substrate is transferred to the skin material adhesive mold every time, the shrinkage (strain) of the substrate is severe, and in addition to the injection mold equipment, the skin material adhesive mold equipment must be separately provided. Therefore, this also takes a lot of cost and installation place, there is a problem that the productivity is significantly reduced due to the large number of processes and long working hours.

In addition, depending on the low-priced national car or compact car or expensive medium / large luxury car models, the interior materials used are different from each other in material and composition. That is, depending on the vehicle model, the interior material injection-molded only with the hard substrate is used, or the interior material with the soft skin material of the fabric pattern bonded to the whole or part of the hard substrate with an adhesive.

However, the conventional high-pressure injection device was not able to perform the injection molding of the interior material of the hard base material alone and the process of bonding the skin material of the fabric pattern together in a mold apparatus, so that the injection mold apparatus and the skin material bonding material of the hard base material were eventually used. The mold apparatus had to be provided separately, and the mold equipment cost was considerably high because another mold apparatus was needed to make a product in which the skin pattern of the material pattern was stuck only on a part of the substrate surface. As the cost of production rises, price competitiveness falls.

In addition, since a lot of adhesives are used to adhere the skin to a part of the surface of the formed substrate, there is always a risk of fire, and the use of a lot of adhesives makes the workplace dirty and severely contaminates the indoor air, causing occupational diseases. The air pollution around the factory is serious, there is a problem that is not environmentally friendly.

In addition, it is difficult to make the work of concealing the edges of the skin material in the substrate by hand, which is difficult and time consuming, and the productivity is considerably reduced. There is a problem falling.

The present invention was developed to solve the conventional problems as described above, an object of the present invention is to produce a high-quality interior material product and the interior material product is molded only with a hard substrate only the skin material of the fabric pattern is bonded only to a portion of the surface of the substrate. It is to provide a molding apparatus of automotive interior materials that can be produced by a single high-pressure injection mold apparatus.

1 is a perspective view showing the interior material is attached to the skin material of the fabric pattern according to the present invention

Figure 2a to Figure 2b is a cross-sectional view showing a molding apparatus structure and the molding process for forming a fabric material with a fabric pattern skin material of the present invention attached

Figures 3a to 3c is an enlarged cross-sectional view of the main portion illustrating the process of the skin pattern of the fabric pattern is attached to a part of the surface of the hard substrate by the present invention

Figures 4a to 4b is an enlarged cross-sectional view showing the main portion illustrating the process of producing the interior material of the hard substrate by the present invention

Explanation of symbols for the main parts of the drawings

10: prize die 11: protrusions

20a: lower mold 20b: movable mold

21: guide 23: lifting means

30: base material injection material 31: skin material

40a: first injection nozzle 40b: second injection nozzle

Hereinafter, a molding apparatus and a molding method of a vehicle interior material that can effectively achieve the features of the present invention will be described in detail by the accompanying drawings as a preferred embodiment as follows.

Figure 2a is a cross-sectional view illustrating the state in which both molds of the mold apparatus according to the present invention is opened and the skin material of the fabric pattern is mounted on the lower mold, and FIG. 2b is a high pressure injection of the substrate after engaging both molds in FIG. 2a. It is a principal part cross section figure which illustrated the state to shape | mold.

In the constituent device of the present invention, the guide hole 21 is formed in a portion on which the fabric pattern skin material 31 is to be placed, and the movable mold 20b formed in the same shape as the skin material 31 is formed. A lower die 20a installed to be elevated by the lifting means 23 in the guide hole 21; An upper mold 10 having a protrusion 11 formed at a portion of the molding surface; A first injection nozzle 40a and a second injection nozzle 40b for supplying injection liquid to the molding space of the lower mold 20a and the movable mold 20b, respectively; It can be said that the mold apparatus for high-pressure injection molding the substrate by the same as the conventional general high-pressure injection apparatus.

A characteristic of the present invention is that when the protrusion 11 is formed on the molding surface of the upper mold 10, the protrusion 11 is formed on the edge of the movable mold 20b so as to correspond to the edge thereof. In the injection mold, the interior material to which the skin material is attached and the interior material of only the hard substrate can be selectively molded. The lifting means 23 may use a cam or the like in addition to the cylinder shown in the drawing.

When the movable mold 20b is raised, the protrusion 11 is pressed against the movable mold 20b by pressing the four edges of the fabric pattern skin material 31 placed thereon, and the movable mold 20b is lowered. At this time, the molding space interval between the movable mold 20b and the protrusion 11 is maintained at the same interval as the molding space elsewhere.

That is, when the movable mold 20b rises, the molding space formed by the movable mold 20b and the lower mold 20a is separated from each other by the protrusion 11, and when the movable mold 20b is lowered, In addition, the isolation state is released and the distance (molding space) with the protrusions 11 is characterized in that it is maintained to be the same as the molding space between the lower mold 20a and the upper mold 10.

In the drawings, reference numerals 12 and 22 are cooling water holes, and 50 are guide rods.

The molding process of the interior material to which the fabric pattern skin material is attached to a part of the substrate of the interior material of the automobile by the apparatus of the present invention formed as described above is described as a first embodiment, and the interior material of only the hard substrate is molded using the same injection mold apparatus. Referring to the process of the second embodiment as follows.

Embodiment 1 (molding of the interior material to which the fabric pattern skin material is attached to one part)

1st process (skin skin pre-injection process)

The upper surface of the fabric pattern is separated from the upper mold 10 as shown in FIG. 2a and then preprocessed from a separate mold apparatus (a mold apparatus having the same molding surface as the movable mold 20b) to vacuum molding and edge trimming to a predetermined shape. The ash 31 is placed on the molding surface of the movable mold 20b.

Second Process (Injection Molding and Primary Aging Process of Substrate Injections)

After the first process, as shown in FIG. 2B, when the upper mold 10 is closed and the movable mold 20b installed in the guide hole 21 of the lower mold 20a is raised to the driving means 23 such as a cylinder, the movable mold 20b is obtained. ) The edge of the upper mold 10 is in contact with the protrusion (11). Then, the protrusion 11 of the upper mold 10 is pressed against the molding surface of the movable mold 20b by pressing the four edges of the skin material 31 placed on the molding surface of the movable mold 20b.

Accordingly, the molding space of the movable mold 20b is separated from the molding space of the lower mold 20a. In this state, the injection space is supplied to the molding space of the lower mold 20a through the existing injection nozzle. If the injection liquid is not introduced into the molding space of the isolated movable mold 20b, as shown in Figure 3a, the injection liquid is filled only in the molding space of the lower mold 20a.

At this time, since the four edges of the skin material 31 placed on the movable mold 20b are exposed to the molding space of the lower mold 20a, the skin material 31 is formed on the injection molded product in the molding space with the lower mold 20a. The edge is buried, and in this state, the cooling water is circulated to the cooling water holes 12 and 22 to perform primary cooling aging of the substrate injection material 30, and the predetermined temperature (about 60 to 80 ° C.) is applied to the substrate injection material 30. Residual heat is maintained.

3rd process (substrate injection molding and secondary aging process on the back of the skin material)

When the second process is completed, the lower mold 20a lowers only the movable mold 20b while being coupled with the upper mold 10. Then, as shown in Figure 3b, the molding space between the movable mold 20b and the upper mold 10 is the thickness of the injection molding filled in the molding space of the upper mold 10 and the lower mold 20a with a gap in the state including the skin material 31 To maintain the same spacing.

In this state, when the injection liquid is supplied to the molding surface of the movable mold 20b through the second injection nozzle of the movable mold 20b, the injection liquid is filled into the bottom surface of the skin material 31 as shown in FIG. 3C. ) Is pushed by the injection liquid to be in close contact with the molding surface of the upper mold 10, the base material injection molded in the molding space with the movable mold 20b (30) is a portion having a different thickness including the skin material 31 Keep the same distance as the thickness.

In addition, since the injection liquid supplied to the movable mold 20b as described above remains in a state where residual heat of a predetermined temperature remains in the substrate injection material 30 that has been cooled and aged in the previous process, the injection liquid 20b is easily integrated with the substrate injection material 30 and integrated. And, the skin material 31 is to form a state attached in a smooth state to the substrate injection material 30, including the rim.

Then, in this state, the cooling water is passed through the cooling water holes 12 and 22 to carry out the secondary cooling aging process of the molded substrate injection molding 30, in which case the complete cooling aging, and then the upper mold 10 Removing and removing the injection molding is a fabric pattern skin material 31 of the present invention is made of a high quality of the interior material attached to a portion in a uniform state.

Second Embodiment (Forming Interior Material Only of Hard Substrate)

1st process (adjustment process of movable mold)

In the mold apparatus of FIG. 2, the movable mold 20b is first lowered by the driving means 23 as shown in FIG. 4A. Then, when the upper mold 10 is closed, the movable space while the molding space between the protrusion 11 and the movable mold 20b maintains the same distance as the molding space between the lower mold 20a and the upper mold. Molding spaces formed by the molding surfaces of the 20b and the lower die 20a communicate with each other.

2nd process (injection molding and maturation process of substrate injection)

After the movable mold 20b is lowered as described above, the injection liquid is injected through the first injection nozzle 40a or the second injection nozzle 40b or by using the first and second injection nozzles 40a and 40b together. Is injected into the molding space to be molded and then cooled and matured to complete the interior of the hard material of uniform thickness.

Accordingly, the present invention is a very high-pressure injection mold apparatus, and as in the first embodiment, the interior material to which the skin material 31 is attached and the interior material made of only the hard substrate of the second embodiment can be molded very ideally.

As described above, the present invention does not use any adhesive when making the interior material to which the skin material is attached to a portion of the surface of the substrate, and thus, there is no risk of fire compared to the conventional use of the adhesive. There is no risk of contamination by smell, etc., so it can be said to be very environmentally friendly invention.

And, using a high-pressure injection mold apparatus installed by lifting a movable mold with an injection nozzle separately installed on a portion of the lower die, the skin material of the fabric pattern is made of only high quality interior material and hard base material uniformly attached to a part of the base surface. As the interior material can be molded and produced, the injection mold apparatus for producing the interior material of the fabric pattern and the interior material of the hard base material does not need to be separately provided, so that the mold equipment cost can be significantly reduced, thereby reducing the production cost. .

Claims (3)

The guide hole 21 is formed at the site where the fabric pattern skin material 31 is to be placed, and a movable mold 20b having a molding surface having the same shape as the skin material 31 is formed in the guide hole 21 such as a cylinder. A lower die 20a installed to be elevated by the lifting means 23; An upper mold 10 having a protrusion 11 formed at a portion of the molding surface; A first injection nozzle 40a and a second injection nozzle 40b for supplying injection liquid to the molding space of the lower mold 20a and the movable mold 20b, respectively; In the mold apparatus for high-pressure injection molding the substrate by When the protrusion 11 is formed on the molding surface of the upper mold 10, the protrusion 11 is formed on the edge of the movable mold 20b so as to correspond to the edge thereof. Molding apparatus for automobile interior material, characterized in that the interior material to be attached and the interior material of the hard base material can be selectively molded. delete delete