JP2006110984A - Connecting structure of partial foamed part for instrument panel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a connecting structure of a partial foamed part for an instrument panel, which greatly increases the productivity of a partial foamed part product with suppressing as much as possible the post treatment work due to leakage of the foaming liquid and produces the partial foamed part product with excellent quality by shutting off more completely leakage of a foaming liquid by forming the connecting structure of a core layer and a skin layer into a composite structure entirely free from leakage of the foaming liquid and also facilitates the work of foaming polyurethane using a foaming mold. <P>SOLUTION: In the connecting structure of the core layer and the skin layer for manufacturing the partial foamed part wherein a polyurethane foam layer is formed in a space between the core layer and the skin layer, a skin insertion part provided at its inner side with an oblique guide face and a pressing face for the skin layer is projectively provided at the core layer end part corresponding to the coupling part of the core layer and the skin layer, and a folding part folded upward so as to abut on the oblique guide face and an elastically holding part elastically held by the lower side of the pressing face are formed at the end part of the skin layer end part fitted into the inner side of the skin insertion part. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a bonded structure of partially foamed portions in an instrument panel for forming a polyurethane foam layer between a core layer and a skin layer and integrally bonding the core layer and the skin layer. The core layer and the skin layer are set in a foaming mold to close the mold, and the skin layer is easily fitted through the skin insertion portion formed in the core layer. The end part is elastically supported inside the skin insertion part and the end side is guided through the narrow groove of the skin insertion part, so that the combined structure of the core layer and skin layer does not leak at all. While forming the structure and blocking the leakage of foaming liquid more completely, it is easy to perform polyurethane foaming work using a foaming mold. Together we are greatly enhanced goods productivity, for binding structure portions foam portion in the instrument panel excellent quality parts foaming unit product is producible.

  As shown in FIG. 14, an instrument panel 10 that is usually used as an interior material for an automobile is attached to the front of a driver seat and a passenger seat of a vehicle. A meter and an instrument panel for providing various warning information, an audio system installation space, a space for storing various items, and the like are provided. The instrument panel 10 also plays a role of protecting passengers by partially absorbing impact force generated at the time of a vehicle collision, and a soft panel method and a hard panel method depending on the manufacturing method. It is roughly divided into

  In the case of the soft panel method, the instrument panel 10 having a triple structure of the core layer, the polyurethane foam layer, and the skin layer has an advantage that an elegant image and a soft feel can be given, but the instrument panel 10 is Since all are formed in a polyurethane foam layer, there is a disadvantage in that it causes an increase in weight and a high manufacturing cost. On the other hand, in the case of the hard panel method, since the instrument panel 10 itself is manufactured by an injection molding method using a single material, there is a merit that effects such as a reduction in weight and a reduction in manufacturing cost can be obtained. Since it lacks an elegant image and a soft feel compared to the panel method, it is currently used mainly for inexpensive small cars.

  As described above, in order to complement the respective disadvantages of the soft panel and the hard panel system and to manufacture the instrument panel 10 by utilizing the advantages of the soft panel and the hard panel system, a structure as shown in FIG. Proposed. Referring to FIG. 15, after the end portion side of the core layer 2 and the end portion side of the skin layer 3 are bent to face each other by a certain angle, the skin layer 3 is bent inside the bent portion of the core layer 2. In a state in which the core layer 2 and the skin layer 3 are bonded so that the portions abut each other, the polyurethane foam layer 4 is foamed therein, and the partial foamed portion 1 in which the core layer 2 and the skin layer 3 are integrally formed is temporarily formed. To manufacture. After that, the instrument panel 10 is finished by manufacturing a portion of the partial foamed portion 1 that is desired to give an elegant image and a soft touch by a soft panel method, and the other portion by a hard panel method.

However, the conventional partially foamed portion 1 as described above has a problem that the foamed liquid easily leaks through the joint portion between the core layer 2 and the skin layer 3 when polyurethane is foamed. If the foaming liquid leaks from the joint portion, the skin layer 3 is formed to be excessively wide. As a result, unnecessary post-processing steps such as a cutting step for removing together with the skin layer 3 polyurethane foam that has leaked to the outside after partial foaming and cured together with the skin layer 3 and a step for finishing the cut surface cleanly are required. This results in an increase in the manufacturing cost of the instrument panel 10 due to an increase in the total manufacturing man-hours together with the material loss of the liquid and the skin layer 3.

  As a supplement to the above-mentioned problems, the leakage of polyurethane foam liquid can be achieved by forming a leakage prevention groove or leakage receiving material in the core layer 2 at the joint where the core layer 2 and the skin layer 3 come into contact with each other. It has been proposed to block. However, such a structure is also merely a bonded structure in which the core layer 2 and the skin layer 3 are engaged with each other, and the leakage of the polyurethane foam cannot be fundamentally blocked.

  Therefore, such a structure cannot greatly contribute to the productivity and quality improvement of the product of the partial foaming portion 1 and the cost reduction of the instrument panel 10.

  The present invention has been made in view of the above circumstances, and its purpose is to form a combined structure of the core layer and the skin layer into a composite structure in which the foaming liquid does not leak at all, thereby further blocking the leakage of the foaming liquid. However, it is easy to foam polyurethane using a foaming mold, and as a result, the post-processing work due to leakage of foaming liquid can be suppressed as much as possible, and the productivity of partially foamed parts can be greatly improved, and parts with excellent quality can be obtained. An object of the present invention is to provide a joint structure of partially foamed portions in an instrument panel that enables production of foamed portion products.

  In order to achieve the above object, the present invention provides a bonded structure of a core layer and a skin layer for producing a partially foamed part in which a polyurethane foam layer is foamed between the core layer and the skin layer. At the end of the core layer corresponding to the joint portion of the skin layer, a skin insertion portion having an oblique guide surface and a pressing surface of the skin layer is protruded on the inside thereof, and the skin layer fitted into the skin insertion portion is The end portion is formed with an oblique bent portion that is bent upward to come into contact with the oblique guide surface, and an elastic holding portion that is elastically supported below the pressing surface.

  Further, according to the present invention, a skin insertion portion provided with a guide groove and an insertion groove of the skin layer is protruded at an end portion of the core layer corresponding to the coupling portion of the core layer and the skin layer, and the skin insertion portion At the end of the skin layer that is fitted inside, an insertion end that is fitted into the insertion groove is formed at the tip of an oblique bent portion that is bent upward so as to be fitted through the guide groove, The guide groove is characterized in that the width of the inflow port is formed to be narrower toward the insertion groove in a state where the width of the inlet is formed wider than the deformation width of the oblique bent portion of the skin layer.

  In the instrument panel according to the present invention, the bonded structure of the partially foamed portion is that the core layer and the skin layer are set in a foaming mold to close the mold, and the skin layer is interposed through the skin insertion portion formed in the core layer. The core layer is formed by elastically supporting the end portion of the skin layer thus inserted inside the skin insertion portion or by inserting the end portion through the narrow groove of the skin insertion portion. The structure that combines the skin layer and the skin layer is formed into a composite structure that does not allow the foaming liquid to leak at all, and it is possible to facilitate foaming of polyurethane using a foaming mold while blocking the leakage of the foaming liquid more completely. . As a result, the post-processing operation due to the leakage of the foaming liquid can be suppressed as much as possible, and the productivity of the partially foamed part product can be greatly enhanced, and the partial foamed part product of excellent quality can be produced.

If a liquid storage space that functions as a polyurethane foam trap is further formed on the core layer / skin layer connection structure according to the present invention, the liquid storage space together with the structure of the connection part according to the present invention is provided. Has the effect of more completely blocking the leakage of polyurethane foam. If the compressed air inlet is formed in the core layer and compressed air can be injected after the foaming mold is closed, the combined structure of the core layer and the skin layer according to the present invention is reproduced without omission according to the design. There is also an effect that polyurethane can be foamed easily and accurately by the foaming mold. As a result, it is possible to further contribute to the improvement of product productivity and the quality improvement of the partially foamed portion.

Hereinafter, preferred embodiments of the present invention will be described in more detail with reference to the accompanying drawings.
FIGS. 1 and 2 are cross-sectional views showing a connecting structure of partially foamed portions in an instrument panel according to a first embodiment of the present invention. FIGS. 3 to 7 are second to fifth embodiments of the present invention. It is sectional drawing which shows the connection structure of the partial foaming part in the instrument panel which concerns on. 8 and 9 are cross-sectional views showing the connecting structure of the partially foamed portions in the instrument panel according to the sixth embodiment of the present invention, and FIGS. 10 and 11 show the seventh embodiment of the present invention. It is sectional drawing which shows the connection structure of the partial foaming part in the instrument panel which concerns. Further, FIGS. 12 and 13 are cross-sectional views showing the coupling structure of the partially foamed portions in the instrument panels according to the eighth and ninth embodiments of the present invention.

  First, as described for the partially foamed portion 1 of the conventional instrument panel 10 with reference to FIG. 15, when foaming the polyurethane foam layer 4 between the core layer 2 and the skin layer 3, leakage of polyurethane foam liquid The portion that has the greatest effect on the thickness is the joint between the core layer 2 and the skin layer 3, that is, the matching structure. For this reason, in the detailed description section of the present invention described later, the structure and operation of each embodiment will be described with a focus on the structure of the joint between the core layer 2 and the skin layer 3 that can be said to be the main part of the present invention. Proceed.

  Moreover, when manufacturing the instrument panel 10 using the partial foaming part 1, as shown in FIG. 15, the skin layer 3 is located in the upper part, and the core layer 2 is located in the lower part. In the case where polyurethane foaming is performed by setting the skin layer 3 and the core layer 2 in a foaming mold, the core layer 2 and the skin layer 3 are set in the foaming mold. The structure of the joint and the joining process will be described with reference to the state in which the layer 2 and the skin layer 3 are set in the foaming mold.

FIG.1 and FIG.2 is sectional drawing which shows the joining structure of the partial foaming part 1 in the instrument panel 10 which concerns on 1st Example of this invention. More specifically, FIG. 1 (a) is a cross-sectional view before the foaming mold is closed, FIG. 1 (b) is a cross-sectional view after the foaming mold is closed, and FIG. It is sectional drawing of the partial foaming part 1 in which the polyurethane foam layer 4 was foam-molded in the foaming die.

  As shown in FIG. 1A, the joint structure of the partially foamed portion 1 according to the first embodiment of the present invention is the end of the core layer 2 set in the upper mold 5, that is, the core layer 2 and the skin. A skin insertion portion 21 having an oblique guide surface 22 and a substantially horizontal pressing surface 23 of the skin layer 3 on its inner side is provided at a portion corresponding to the joint portion of the layer 3, and is bent upward to project from the lower mold 6. The end portion of the skin layer 3 set to the side, that is, the portion corresponding to the joint portion of the core layer 2 and the skin layer 3 is obliquely bent upward so as to contact the oblique guide surface 22 of the skin insertion portion 21 A bent portion 31 and an elastic holding portion 32 that is bent rearward on the end side of the oblique bent portion 31 and elastically supported on the lower side of the pressing surface 23 are formed.

When the foaming mold is closed with the core layer 2 and the skin layer 3 having the structure of the joint as described above being set in the upper mold 5 and the lower mold 6 constituting the foaming mold, respectively, FIG. As shown in FIG. 4, the oblique bent portion 31 of the skin layer 3 is guided along the oblique guide surface 22 of the skin insertion portion 21, and the elastic holding portion 32 of the skin layer 3 is supported by the pressing surface 23 of the skin insertion portion 21. By urging downward, the obliquely bent portion 31 of the skin layer 3 is also pressed against the oblique guide surface 22 side of the skin inserting portion 21.

For this reason, simultaneously with closing of the foaming mold, a primary sealing force (sealing force) is applied between the pressing surface 23 of the skin insertion portion 21 and the tip elastic holding portion 32 of the skin layer 3, As a result of the secondary sealing force acting between the oblique guide surface 22 of the skin insertion portion 21 and the oblique bent portion 31 of the skin layer 3 by the primary sealing force, the core layer 2 and the skin layer 3 are interposed. A strong sealing force works.

  When the foaming operation is performed by injecting a polyurethane foam between the core layer 2 and the skin layer 3 in the state as described above, the fluid flows on the skin layer 3 toward the joint between the core layer 2 and the skin layer 3. The foaming liquid does not leak to the outside due to the strong sealing force acting twice between the core layer 2 and the skin layer 3. In addition, when the polyurethane foams, the contact force acting between the pressing surface 23 and the elastic holding part 32 is further enhanced by the foaming pressure, and as shown in FIG. 1 can be manufactured.

Further, as shown in an enlarged view in FIG. 1 (b), the oblique guide surface 22 formed on the inner side of the skin insertion portion 21 may extend straight to the pressing surface 23. When the core layer 2 corresponding to the connecting portion of the pressing surface 23 is bent upward by a certain angle, the bent portion serves as a trap of polyurethane foam between the core layer 2 and the skin layer 3. The formation of the liquid storage space 24 is more desirable in terms of preventing the foaming liquid from leaking.

  In the liquid storage space 24, a very small amount of foaming liquid that leaks through the pressing surface 23 of the skin insertion part 21 and the tip holding part 32 of the skin layer 3 flows into the interior, and at the same time, the leakage pressure of the foaming liquid is significantly reduced. By blocking the leakage of the foaming liquid secondarily, it is possible to further contribute to prevention of leakage of the polyurethane foaming liquid. Further, the liquid storage space 24 forms a boundary surface between the pressing surface 23 and the oblique guide surface 22 by a certain angle so that the elastic holding portion 32 of the skin layer 3 can be easily fitted into the pressing surface 23 when the foaming mold is closed. It is desirable to bend or round it.

  Further, in the second embodiment of the connecting structure of the partial foamed portions in the instrument panel, as shown in FIG. 3, the oblique guide surface 22 and the pressing surface 23 of the skin insertion portion 21 are each bent obliquely of the skin layer 3. Except for being formed in close contact with the part 31 and the holding part 32, it has substantially the same structure as in the first embodiment. That is, the oblique guide surface 22 is in close contact with the oblique bent portion 31, and the pressing surface 23 is in close contact with the oblique bent portion 31, and as a result, leakage of the foaming liquid is prevented over the entire contact surface.

  4 and FIG. 5, the third embodiment of the combined structure of the partial foamed portions in the instrument panel is the same as in the second embodiment, the oblique guide surface 22 and the pressing surface of the skin insertion portion 21. 23 are formed in close contact with the obliquely bent portion 31 and the elastic holding portion 32 of the skin layer 3, respectively, and the oblique guide surface 22 and the pressing surface 23 of the skin insertion portion 21 so that liquid can accumulate between the skin layers 3. A concave groove 29 is formed in either of these.

  Here, FIG. 4 shows a case where a V-shaped wedge-shaped groove is formed at the boundary between the pressing surface and the oblique guide surface, and FIG. 5 shows a groove formed on one side of the oblique guide surface. Shows the case. As described above, the concave groove has the same function as a liquid storage space that functions as a trap for polyurethane foam.

Referring to FIG. 6, in the fourth embodiment of the combined structure of the partial foamed portions in the instrument panel, the oblique guide surface 22 and the pressing surface 23 of the skin insertion portion 21 are respectively similar to the case of the second embodiment. The skin layer 3 is formed in close contact with the diagonally bent portion 31 and the elastic holding portion 32, and the joint portion between the oblique guide surface 22 and the pressing surface 23 of the skin insertion portion 21 is formed in a round shape. When attaching an upper metal mold | die and a lower metal mold | die, the role holding part 32 of a skin layer becomes easy to engage | insert in the skin insertion part 21, and the role which strengthens the adhesive force between a skin layer and a core layer.

  Then, referring to FIG. 7, in the fifth embodiment of the combined structure of the partial foamed portions in the instrument panel, the oblique guide surface 22 and the pressing surface 23 of the skin insertion portion 21 are respectively similar to the case of the second embodiment. The skin layer 3 is formed in close contact with the obliquely bent portion 31 and the elastic holding portion 32, and the joint portion between the oblique guide surface 22 and the pressing surface 23 of the skin insertion portion 21 so that the liquid can accumulate between the skin layers 3. An inner space portion 30 is formed on the skin layer, and the elastic support portion 32 of the skin layer is bent toward the inner space portion.

  In the fifth embodiment, a wider inner space portion than the above-described embodiment having the foaming liquid trap is separately formed to prevent the leakage of the foaming liquid, and the elastic holding portion is directed to the inner space portion to bend obliquely. By delaying the occurrence of the buckling phenomenon of the part, the coupling force between the holding part and the pressing surface is strengthened.

  Since the skin layer 3 according to the first to fifth embodiments is made of a thin material, in the process of closing the foaming mold, the tip elastic part 32 of the skin layer 3 is the skin insertion part 21 of the core layer 2. There is a possibility that a portion that is not accurately fitted through the gap will occur. In preparation for such a case, the core layer 2 has a compressed air for injecting compressed air through a sealed space formed between the core layer 2 and the skin layer 3 after closing the foaming mold. An inlet 7 is formed.

  The compressed air inlet 7 injects compressed air through the upper mold 5 on which the core layer 2 is set, so that the tip elastic holding portion 32 of the skin layer 3 is brought into contact with the skin insertion portion 21 by the pressure of the compressed air. The pressing surface 23 is urged more strongly. Thereby, the foaming operation of the polyurethane by the foaming mold can be performed more easily and accurately, and as a result, the product of the partial foaming part 1 can be further increased in productivity and quality.

8 and 9 are cross-sectional views showing the coupling structure of the partial foamed portion 1 in the instrument panel 10 according to the sixth embodiment of the present invention. More specifically, FIG. 8 (a) is a cross-sectional view before the foaming mold is closed, FIG. 8 (b) is a cross-sectional view after the foaming mold is closed, and FIG. It is sectional drawing of the partial foaming part 1 in which the polyurethane foam layer 4 was foam-molded in the metal mold | die.

As shown in FIG. 8B, the joint structure of the partial foamed portion 1 according to the sixth embodiment of the present invention is the end of the core layer 2 set in the upper mold 5, that is, the core layer 2 and the skin. A skin insertion portion 21 provided with a guide groove 25 and an insertion groove 26 of the skin layer 3 on the inner side is projected at a portion corresponding to the coupling portion of the layer 3, and is set on the lower mold 6. An oblique bent portion that is bent upward so as to be fitted through the guide groove 25 of the skin insertion portion 21 at an end portion of the skin layer 3, that is, a portion corresponding to a joint portion between the core layer 2 and the skin layer 3. 31 and an insertion end portion 33 that is bent to the front side on the end portion side of the oblique bent portion 31 and fitted into the insertion groove 26 is formed.

  The guide groove 25 has an inverted V shape in which the width becomes narrower toward the insertion groove 26 in a state where the width D of the inflow port is wider than the deformation width θ of the oblique bent portion 31 of the skin layer 3. . The guide groove 25 is formed in an inverted V shape in this way when the end portion of the thin skin layer 3 is bent to form the oblique bent portion 31. Accordingly, the width D of the inlet of the guide groove 25 is made wider than the expected deformation width θ to correct the deformation of the oblique bent portion 31 and the width becomes relatively narrow. This is because the insertion end portion 33 of the skin layer 3 can be more easily fitted through the insertion groove 26.

  The reason why the insertion end 33 is bent forward from the diagonally bent portion 31 of the skin layer 3 is that the end portion of the thin skin layer 3 is bent twice so that its structural The strength is improved, thereby preventing the wavy phenomenon of the skin layer 3 that may occur while the skin layer 3 is fitted along the guide groove 25 while suppressing the deformation width θ of the oblique bent portion 31 as much as possible. In addition, by inserting the insertion end portion 33 of the skin layer 3 through the insertion groove 26 of the skin insertion portion 21 and generating a strong binding force at the insertion portion, leakage of polyurethane foaming liquid can be more reliably prevented. It is to make it.

  In this manner, the foamed mold is set with the core layer 2 and the skin layer 3 having the joint structure according to the sixth embodiment of the present invention set in the upper mold 5 and the lower mold 6 constituting the foam mold, respectively. When the mold is closed, as shown in FIG. 8 (b), the diagonally bent portion 31 of the skin layer 3 enters along the guide groove 25 of the skin insertion portion 21, and the insertion end portion 33 of the skin layer 3 By fitting in the insertion groove 26 of the skin insertion portion 21, a strong sealing force (pressing contact force) is generated between the insertion groove 26 of the skin insertion portion 21 and the insertion end portion 33 of the skin layer 3. The insertion groove 26 and the insertion end 33 form a complicated structure in which polyurethane foam does not leak at all in a narrow space.

In the state as described above, if a foaming operation is performed by injecting a polyurethane foam between the core layer 2 and the skin layer 3, it rides on the skin layer 3 toward the joint between the core layer 2 and the skin layer 3. The flowing foamed liquid is prevented from leaking through the insertion groove 26 and the insertion end 33, which are combined with a strong sealing force and a complicated structure in a narrow space. As a result, as shown in FIG. A partially foamed portion 1 that does not leak at all can be manufactured. As is clear from FIG. 8 (b),
The foaming liquid that flows on the skin layer 3 and flows toward the joint between the core layer 2 and the skin layer 3 does not flow directly on the guide groove 25, and the foaming liquid naturally flows toward the lower part of the guide groove 25. It is desirable that the core layer 2 corresponding to the position immediately after the guide groove 25 is bent upward by a certain angle so as to flow.

  Similarly to the first embodiment of the present invention, the core layer 2 is closed after the foaming mold is closed so that the insertion end 33 of the skin layer 3 can be fitted more accurately through the insertion groove 26 of the skin insertion portion 21. It is easier and more accurate to foam polyurethane with a foaming mold if the core layer 2 has a compressed air inlet 7 for injecting compressed air through a sealed space formed between the skin and the skin layer 3. And, it is more desirable in terms of productivity improvement and quality improvement of the product of the partial foaming portion 1.

FIG.10 and FIG.11 is sectional drawing which shows the joining structure of the partial foaming part 1 in the instrument panel 10 which concerns on 7th Example of this invention. More specifically, FIG. 10 (a) is a sectional view before the foaming mold is closed, FIG. 10 (b) is a sectional view after the foaming mold is closed, and FIG.
1 is a cross-sectional view of a partially foamed portion 1 in which a polyurethane foam layer 4 is foam-molded in a foaming mold.

The coupling structure of the partial foamed portion 1 in the instrument panel 10 according to the seventh embodiment of the present invention is a folding surface 27 on the connecting surface on one side of the guide groove 25 and the insertion groove 26 formed inside the skin insertion portion 21. Except that a liquid reservoir space 24 ′ acting as a trap for polyurethane foam is formed between the bent curved surface 27 and the obliquely bent portion 31 of the skin layer 3. This is substantially the same as the structure according to the sixth embodiment of the invention.

  The liquid storage space 24 ′ is also a very small amount of foam that leaks through the insertion groove 26 of the skin insertion portion 21 and the insertion end portion 33 of the skin layer 3 as described above in the first embodiment of the present invention. By causing the liquid to flow into the inside to significantly reduce the leakage pressure of the foaming liquid and secondarily blocking the leakage of the polyurethane foaming liquid, it is possible to greatly contribute to the prevention of the leakage of the foaming liquid.

Further, referring to FIG. 12, the eighth embodiment of the partially foamed joint structure in the instrument panel is a liquid between the core layer 2 and the skin layer 3 in the sixth and seventh embodiments. A concave groove 29 is formed on one side surface of the guide groove 25 of the skin insertion portion 21 so as to accumulate.

  Finally, in the sixth and seventh embodiments of the present invention, the insertion groove 26 and the insertion end 33 of the skin layer 3 are more effectively prevented from leaking as the insertion groove 26 is formed into a narrower groove. It becomes a mechanism. However, if the insertion groove 26 is formed too narrow, the injection mold for forming the core layer 2 becomes a projecting shape, resulting in a decrease in strength at the location where the insertion groove 26 is formed.

  For this reason, in the ninth embodiment, as shown in FIG. 13, a large number of ribs 40 (frames attached to the plate or the thin portion) are provided on the inner side along the longitudinal direction of the insertion groove 26 of the coupling structure of the partial foamed portion. ) Has been proposed.

  FIG. 13 is a cross-sectional view of a portion to which a rib is attached. The width of the insertion groove 26 is preferably such that the rib of the insertion groove 26 formed by the mold becomes wider toward the inner side of the insertion groove with the width of the opening widened. It has a structure that narrows.

It is sectional drawing which shows the joint structure of the partial foaming part in the instrument panel which concerns on 1st Example of this invention. It is sectional drawing which shows the joint structure of the partial foaming part in the instrument panel which concerns on 1st Example of this invention. It is sectional drawing which shows the connection structure of the partial foaming part in the instrument panel which concerns on 2nd Example of this invention. It is sectional drawing which shows the joint structure of the partial foaming part in the instrument panel which concerns on 3rd Example of this invention. It is sectional drawing which shows the joint structure of the partial foaming part in the instrument panel which concerns on 3rd Example of this invention. It is sectional drawing which shows the joint structure of the partial foaming part in the instrument panel which concerns on 4th Example of this invention. It is sectional drawing which shows the connection structure of the partial foaming part in the instrument panel which concerns on 5th Example of this invention. It is sectional drawing which shows the joint structure of the partial foaming part in the instrument panel which concerns on 6th Example of this invention. It is sectional drawing which shows the joint structure of the partial foaming part in the instrument panel which concerns on 6th Example of this invention. It is sectional drawing which shows the connection structure of the partial foaming part in the instrument panel which concerns on 7th Example of this invention. It is sectional drawing which shows the connection structure of the partial foaming part in the instrument panel which concerns on 7th Example of this invention. It is sectional drawing which shows the joint structure of the partial foaming part in the instrument panel which concerns on 8th Example of this invention. It is sectional drawing which shows the connection structure of the partial foaming part in the instrument panel which concerns on 9th Example of this invention. It is a perspective view which shows a normal instrument panel. It is AA 'line sectional drawing of FIG. 1, Comprising: It is sectional drawing which shows the partial foaming part in an instrument panel.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Partial foaming part 2 Core layer 3 Skin layer 4 Polyurethane foam layer 5 Upper metal mold 6 Lower metal mold 7 Pressure air injection port 10 Instrument panel 21 Skin insertion part 22 Diagonal guide surface 23 Press surface 24, 24 'Liquid storage space 25 Guide Groove 26 Insertion groove 27 Folding curved surface 31 Diagonal bending part 32 Elastic holding part 33 Insertion end part

Claims (14)

Bonding of the core layer (2) and the skin layer (3) to produce a partially foamed part (1) in which the polyurethane foam layer (4) is foamed between the core layer (2) and the skin layer (3) In structure
At the end of the core layer (2) corresponding to the joint between the core layer (2) and the skin layer (3), the oblique guide surface (22) and the pressing surface (23) of the skin layer (3) A skin insertion part (21) comprising:
At the end of the skin layer (3) fitted inside the skin insertion part (21), an oblique bent part (31) which is bent upward so as to come into contact with the oblique guide surface (22), and the press A coupling structure for partially foamed portions in an instrument panel, characterized in that a resilient holding portion (32) elastically supported below the surface (23) is formed.   A liquid storage space (24) is provided between the connecting portion between the oblique guide surface (22) and the pressing surface (23) of the skin insertion portion (21) and the elastic holding portion (32) of each skin layer (3). 2) is formed, the partially foamed joint structure in the instrument panel according to claim 1.   The slant bending part (31) and the elastic holding part (32) of the skin layer (3) are formed in close contact with the slant guide surface (22) and the pressing surface (23) of the skin insertion part (21), respectively. The joint structure of the partial foaming part in the instrument panel of Claim 1 characterized by the above-mentioned.   A liquid is accumulated between the skin layers (3) by forming a concave groove (29) on either the oblique guide surface (22) or the pressing surface (23) of the skin insertion portion (21). The joint structure of the partial foaming part in the instrument panel of Claim 3.   The partial foaming portion in the instrument panel according to claim 3, wherein the joint portion between the oblique guide surface (22) and the pressing surface (23) of the skin insertion portion (21) is rounded. Bonding structure.   An inner space portion (30) is formed at a joint portion between the oblique guide surface (22) and the pressing surface (23) of the skin insertion portion (21), and the elastic holding portion (32) of the skin layer is the inner space portion. The joint structure of the partial foaming part in the instrument panel of Claim 3 currently bent toward the direction.   The core layer (2) has a compressed air inlet (7) for injecting compressed air into a sealed space formed between the core layer (2) and the skin layer (3) after the foaming mold is closed. It forms, The joint structure of the partial foaming part in the instrument panel in any one of Claims 1-6 characterized by the above-mentioned. Bonding of the core layer (2) and the skin layer (3) to produce a partially foamed part (1) in which the polyurethane foam layer (4) is foamed between the core layer (2) and the skin layer (3) In structure
A guide groove (25) and an insertion groove (26) of the skin layer (3) are formed inside the end portion of the core layer (2) corresponding to the joint portion of the core layer (2) and the skin layer (3). The skin insertion part (21) provided is provided in a protruding manner,
The tip of the obliquely bent portion (31) bent upward at the end of the skin layer (3) to be fitted inside the skin insertion portion (21) so as to be fitted through the guide groove (25). An insertion end portion (33) to be fitted into the insertion groove (26) is formed in the portion, and the partial foamed portion coupling structure in the instrument panel.   The width of the guide groove (25) increases toward the insertion groove (26) in a state where the width D of the inlet is formed wider than the deformation width θ of the obliquely bent portion (31) of the skin layer (3). The joint structure of the partial foaming part in the instrument panel according to claim 8, wherein the shape of the instrument panel is narrowed. A folding surface (27) is formed on a connecting surface on one side of the guide groove (25) and the insertion groove (26) formed on the inner side of the skin insertion portion (21). The joint structure of the partial foaming part in the instrument panel according to claim 8, wherein a liquid storage space (24 ') is formed between the skin layer (3) and the oblique bent part (31).   The obliquely bent portion (31) and the insertion end (33) of the skin layer are formed in close contact with the guide groove (25) and the insertion groove (26) of the skin insertion portion (21), respectively. The joint structure of the partial foaming part in the instrument panel of Claim 8.   The combined structure of partial foaming portions in an instrument panel according to claim 8, wherein one or more ribs (40) are formed on one side surface of the insertion groove (26) of the skin insertion portion (21).   By forming a concave groove (29) on one side of the guide groove (25) of the skin insertion part (21), a liquid is accumulated between the core layer (2) and the skin layer (3). The joint structure of the partial foaming part in the instrument panel of Claim 8.   The core layer (2) has a compressed air inlet (7) for injecting compressed air into a sealed space formed between the core layer (2) and the skin layer (3) after the foaming mold is closed. It forms, The joint structure of the partial foaming part in the instrument panel in any one of Claims 8-13 characterized by the above-mentioned.

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