JP2009101842A - Metal mold for blow molding, laminated plate manufactured by using the metal mold, and method of manufacturing the laminated plate - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a novel metal mold for blow molding capable of arranging a stopper mechanism in a laminated plate having a door , the laminated plate manufactured by using the same, and a manufacturing method of the laminated plate. <P>SOLUTION: The laminated plate is formed by blow molding by injecting compressed air by welding mutual ends of two thermoplastic resin plates 6 and 7, and has a body 4M and the door 5 forming an upper side integral hinge 8 as a cut and raised base BL by cutting and raising a part of the body 4M in a predetermined shape. In the blow molding, the door 5 is formed in a state of being inclined to the body 4M, and a distance to a cut and raised tip 5S from the upper side integral hinge 8 is elongated longer than a distance to the inside edge 4E of the body 4M from the upper side integral hinge 8, and the cut and raised tip 5S is overlapped by a predetermined quantity (d) with the inside edge 4E of the body part 4M. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a blow mold, a laminated plate produced using the same, and a method for producing the laminated plate.

  Conventionally, in order to effectively use a luggage compartment storing automobile spare tires as a laminated plate, a tray provided with an accessory case and a tool storage portion is arranged in the spare tire storage compartment, and the upper side of the tray is a luggage mat. What was covered is known (for example, refer to patent documents 1).

  In Patent Document 1, a part of the luggage mat is cut and raised to provide a door part that can be rotated via a hinge, and by opening the door part, an object can be taken in and out from the tray. ing.

  However, simply raising a part of the door part causes the door part to fall into the opening formed by raising the door part.

Therefore, in this patent document 1, the stopper structure which inclines the side surface on the opposite side of the hinge of a door part to the hinge side, and prevents a door part falling inward of an opening part is provided.
JP 2000-108752 A

  However, in the above conventional technique, a luggage mat provided with a door portion and provided with a stopper structure is disclosed, but a specific manufacturing method and an apparatus therefor are not disclosed.

  Accordingly, the present invention provides a novel blow molding die that can be provided with a stopper structure in a laminated plate provided with a door, a laminated plate produced using the same, and a method for producing the laminated plate. It is the purpose.

  In invention of Claim 1, the main-body part by which the edge parts of the two thermoplastic resin board parts were welded together, and the door part which cut and raised a part of the said main-body part with the predetermined shape A laminated plate formed as a hollow double wall structure by blow-molding the two plate portions arranged in the front and back direction with a predetermined interval, using an upper die and a lower die, The door portion is provided with a first hinge portion as a cut-and-raised base portion on one surface side of the front and back surfaces of the main body portion, and a front-end portion that is cut and raised on the opposite side of the first hinge portion. It is formed, The cut-and-raised tip part of the door part overlaps with the inner edge of the main-body part which the cut-and-raised tip part opposes by a predetermined amount.

  The invention according to claim 2 is characterized in that in the laminated board according to claim 1, at least one of a raised cross-linking material and a reinforcing member is disposed between the two plate portions. .

  In the invention of claim 3, blow molding comprising an upper die and a lower die for blow-molding a laminated plate having a main body portion and a door portion in which a part of the main body portion is cut and raised with a predetermined shape. A mold for a main body part, and a cavity for molding a door part provided on the inner peripheral side of the main body part molding cavity with the upper mold and the lower mold closed. The bottom surface portion of the door portion molding cavity is inclined with respect to the bottom surface portion of the main body portion molding cavity, and the top surface portion of the door portion molding cavity is relative to the top surface portion of the main body portion molding cavity. The door portion forming cavity is inclined in the same direction as the inclination direction of the bottom surface portion.

  According to a fourth aspect of the present invention, in the blow molding die according to the third aspect, at a boundary between the second door part molding surface and the second body part molding surface of the lower mold in a predetermined direction. An extended first integral hinge forming portion is provided in a projecting manner, and the upper die and the lower die are closed on the upper die, on the substantially extended line of the first integral hinge forming portion, A second integral hinge forming portion extending in a predetermined direction is provided so that a side ridge line of the first integral hinge formation portion and a side ridge line of the second integral hinge formation portion are in contact with each other. It is characterized by that.

  In the invention of claim 5, the laminated body having the main body part and the door part in which a part of the main body part is cut and raised in a predetermined shape, the main body part with the upper mold and the lower mold closed. Laminate plate that is blow-molded using a mold having a molding cavity and a door molding cavity that is provided on the inner peripheral side of the main body molding cavity and is inclined obliquely with respect to the main body molding cavity A first step of heat-softening two thermoplastic resin plates and one of the two heat-softened thermoplastic resin plates being vacuum sucked into the lower mold A second step of vacuum forming the inner shape of the lower mold, a third step of disposing the other thermoplastic resin plate softened by heating above the one thermoplastic resin plate, and the upper mold The mold is clamped while vacuuming A fourth step of welding the peripheral portions of the two thermoplastic resin plates to form a laminated member, and injecting compressed air into the laminated member to shape the inner surface of the mold And a fifth step of forming a hollow laminated plate.

  According to the first aspect of the present invention, the cut-and-raised tip portion formed on the opposite side of the first hinge portion of the door portion is overlapped by a predetermined amount on the inner edge of the main body portion facing the cut-and-raised tip portion. Thus, it is possible to obtain a laminated plate provided with a stopper structure that prevents the door portion from falling inward of the opening.

  According to invention of Claim 2, the hollow part between two board parts can be filled by arrange | positioning at least 1 of the raising bridge material and a reinforcement member between two board parts. Therefore, the rigidity of the laminated plate can be increased.

  According to the invention of claim 3, the bottom surface of the cavity for molding the door part formed in the mold with the upper mold and the lower mold closed in the blow molding mold is the bottom surface of the cavity for molding the main body part. The top surface of the door molding cavity is inclined in the same direction as that of the bottom surface of the door molding cavity with respect to the top surface of the body molding cavity. Thus, the door of the laminated plate can be formed by being inclined with respect to the main body in the mold.

  According to the fourth aspect of the present invention, the second integral extending in a predetermined direction on a substantially extended line of the first integral hinge forming portion projecting from the lower mold on the upper mold of the blow mold. By projecting the hinge forming portion, the second integral hinge located on the substantially extended line of the first integral hinge provided on one surface side of the front and back surfaces of the main body portion is connected to the second integral hinge. It can be formed so as to be rotatable on the other surface side of the main body portion around the integral hinge.

  As a result, the door portion can be retracted along with the first hinge portion. Therefore, when the door portion is formed in a state inclined to the other surface side, the front end portion of the door portion is the inner edge of the main body portion. Without interfering with the door, the door can be turned to one surface side.

  According to the invention of claim 5, when the main body is blow-molded in the mold, the door is inclined with respect to the main body in the mold. It can be formed longer than the length of the opening of the door, the cut-and-raised tip of the door can overlap the inner edge of the main body by a predetermined amount, and the door on the laminated plate is inward of the opening A stopper structure can be provided so as not to fall into the space.

  Furthermore, since the laminated plate can be formed at the same time as blow molding including the stopper structure of the door portion, it can be completed by a single process, and productivity can be improved.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Here, a vehicle deck board is illustrated as a laminated board.

  FIG. 1 is a plan view of a vehicle deck board according to the present embodiment, FIG. 2 is a perspective view of the vehicle deck board with a door portion in an open state, and FIG. 3 is a cross-sectional view taken along line AA in FIG. 4 is a cross-sectional view taken along the line B-B in FIG. 3, and FIG. 5 is a cross-sectional view showing a state where the back side sheet material is vacuum-sucked into the lower mold, and a cross-section of a portion corresponding to the line AA in FIG. 6 is a cross-sectional view showing a state in which the vehicle deck board is clamped with the upper mold and the lower mold, and is a cross-sectional view of a portion corresponding to the line AA in FIG. 1, and FIG. FIG. 8 is a cross-sectional view showing a state in which the upper die and the lower die are vertically separated, and is a cross-sectional view of a portion corresponding to line AA in FIG. 1, and FIG. 8 is a cross-sectional view showing the vehicle deck board taken out from the mold FIG. 9 is a cross-sectional view of a portion corresponding to line AA in FIG. 1, FIG. 9 is a cross-sectional view taken along line CC in FIG. 1, and FIG. 10 is a state where the upper die and the lower die are closed. 1 is a cross-sectional view of a part corresponding to the line CC in FIG. 1, and FIG. 11 is a cross-sectional view showing a state in which an upper mold and a lower mold are separated vertically, FIG. 12 is a cross-sectional view of a portion corresponding to the DD line of FIG. 12, and FIG. 12 is a cross-sectional view showing a state in which the vehicle deck board is clamped with the upper mold and the lower mold, corresponding to the DD line of FIG. It is sectional drawing of a part.

  A vehicle deck board (laminate board) 4 according to the present embodiment includes a thermoplastic resin surface side sheet (plate part) 6, a thermoplastic resin back side sheet (plate part) 7, and these surface side sheets. 6 and the rear surface side sheet 7, a foamed resin (raised cross-linking material) 12 which is a thermoplastic resin foam molded article that supports the front surface side sheet 6 and the rear surface side sheet 7, and the front surface side sheet 6 and A substantially square tubular reinforcement 13 is provided as a reinforcing member that is interposed between the rear surface side sheet 7 and the vehicle to increase the rigidity of the vehicle deck board 4.

  In the present embodiment, filler-reinforced polypropylene in which a filler is blended with polypropylene is used as the front surface side sheet 6 and the back surface side sheet 7, respectively. As the filler, mica, calcium carbonate, wood powder, carbon fiber, glass length Various things, such as a fiber, can be used.

  And with the foamed resin 12 and the reinforcement 13 interposed, the end portions of the front surface side sheet 6 and the back surface side sheet 7 are welded to each other, so that a hollow molded body with a raised cross-linking material (a hollow laminate with a raised cross-linking material) Plate) 15 is formed.

  Moreover, in this embodiment, the surface side of the surface side sheet | seat 6 is coat | covered with the nonwoven fabric. That is, the covering portion 14 covered with the nonwoven fabric is formed on the surface of the top sheet 6. In addition, a coating | coated part may be provided in the back surface side of the back surface side sheet 7, and may be provided in each of the front and back surface side sheets 6 and 7. Moreover, it is not necessary to provide a coating | coated part.

  Further, in the present embodiment, the vehicle deck board 4 includes a main body portion 4M formed flat along the floor shape of the luggage room (not shown), and as shown in FIGS. A substantially rectangular door portion 5 formed to be openable and closable inside the main body portion 4M. By opening the door portion 5, an object in a tray (not shown) can be taken in and out. Yes.

  As shown in FIG. 3, the main body portion 4 </ b> M and the door portion 5 include a front surface side sheet 6 and a back surface side sheet 7 made of thermoplastic resin arranged in a front and back direction (vertical direction in FIG. 3) with a predetermined interval S. A hollow double wall structure is formed by blow molding in the mold 20.

  And the door part 5 is located in the left-right center part of the main-body part 4M near the back of the center part in the front-rear direction, and is cut and raised with a U-shaped cutting line CL so as to open and close the rear side.

  On the surface side sheet 6 side of the door portion 5, an upper integrator as a first hinge portion provided with a rotation center on the front surface side of the main body portion 4 </ b> M (one surface side of the front and back surfaces of the main body portion 4 </ b> M). The hinge 8 is provided so as to extend in the width direction of the vehicle deck board 4, and the upper integral hinge 8 serves as a cut-up base BL of the door 5. Further, as shown in FIG. 6, the door portion 5 is formed by being cut and raised from the upper integral hinge 8 with respect to the main body portion 4M within the mold 20 and inclined at a predetermined angle (inclination angle α) to the tip portion 5S. In addition, the length L1 of the door 5 is formed to be longer than the length L2 of the opening 9 of the door 5.

  Thus, the door part 5 concerning this embodiment is set to L1> L2, and when the door part 5 is installed in a regular position as shown in FIG. 3, it cuts and raises the front-end | tip part of the said door part 5 5S is formed so as to overlap the inner edge 4E of the main body 4M facing the tip 5S by a predetermined amount d.

  Also, as shown in FIGS. 1 to 3, the lower integral hinge 10 as the second hinge portion is on the substantially extended line of the upper integral hinge 8 on the back surface side sheet 7 side of the main body portion 4M. The vehicle body 4 </ b> M is provided so as to extend in the width direction of the vehicle deck board 4, and the main body 4 </ b> M can be rotated to the back surface side (downward in FIG. 3) around the lower integral hinge 10. Yes.

  That is, the upper integral hinge 8 and the lower integral hinge 10 are formed at positions approximately corresponding to the vertical direction and separated by a predetermined distance S in the vertical direction.

  Further, between the upper integral hinge 8 and the lower integral hinges 10 on both sides, cutting portions 11 for cutting the left and right side portions of the door portion 5 over a predetermined section K are formed. The integral hinges 8 and 9 on the side can be easily rotated independently of each other.

  Moreover, in this embodiment, the insertion hole 19 which is the trace by which the air blow pin 24 was inserted is provided in the side wall part 4a of the main-body part 4M, and the side wall part 5a of the door part 5. FIG.

  The vehicle deck board 4 according to the present embodiment is integrally formed as a hollow double wall structure by blow molding using a mold 20 including an upper mold 21 and a lower mold 22.

  As shown in FIGS. 7 and 11, the mold 20 according to the present embodiment includes an upper mold 21 and a lower mold 22, and the vehicle deck board with the upper mold 21 and the lower mold 22 being closed. A cavity 23 for blow molding 4 is formed.

  The cavity 23 includes a body part molding cavity 23M that molds the body part 4M, and a door part molding cavity 23D that molds the door part 5 provided on the inner peripheral side of the body part molding cavity 23M. . At this time, in the central part of the upper mold 21 and the lower mold 22, the main body molding cavity 23Mf and the main body molding cavity 23Mr are separated in the front-rear direction (left-right direction in FIG. 7) across the door molding cavity 23D. Is formed.

  In the present embodiment, the body part molding cavities 23Mf and 23Mr at both ends in the front-rear direction are formed so as to be at the same level (substantially horizontal) in the vertical direction, and the door part molding cavity 23D in the center part is The main body portion forming cavity 23Mf is inclined downward by an angle α toward the rear (rightward in FIG. 7).

  Specifically, the bottom surface portion 22a of the lower door portion molding surface provided in the door portion molding cavity 23D of the lower mold 22 is set to the bottom surface portion 22b of the lower body portion molding surface of the main body portion molding cavity 23Mf. The top surface 21a of the upper door molding surface provided in the door molding cavity 23D of the upper die 21 is inclined downward by an angle α toward the rear, and the upper body molding surface of the main body molding cavity 23Mf. By tilting downward from the top surface portion 21b by an angle α (in the same direction as the tilting direction of the bottom surface portion 22a of the lower door molding surface provided in the door molding cavity 23D), With the mold 21 and the lower mold 22 closed, the door part forming cavity 23D is inclined downward by an angle α toward the rear with respect to the body part forming cavity 23Mf.

  In addition, as shown in FIGS. 11 and 12, the lower mold 22 is provided with a plurality of insertion holes 25 for inserting a plurality of air blow pins 24 into the cavity 23 at required locations.

  Further, the lower mold 22 and the upper mold 21 include an integral hinge forming part (first integral hinge forming part) 27 and an integral hinge forming part that form the upper integral hinge 8 and the lower integral hinge 10, respectively. (Second integral hinge forming portion) 27a is provided so as to extend in the width direction. That is, the integral hinge forming portion 27 that forms the upper integral hinge 8 is formed at a position corresponding to the cut-and-raised base portion BL (see FIG. 2) of the door portion forming cavity 23D of the lower mold 22 and has an inverted V-shaped cross section. It protrudes in a shape. Further, the integral hinge forming portion 27a that forms the lower integral hinge 10 is formed at a position corresponding to a portion of the upper die 21 where the cut-and-raised base BL is extended, and protrudes in a V-shaped cross section. In other words, the integral hinge forming portion 27 a is provided so as to extend in the width direction on a substantially extended line of the integral hinge forming portion 27.

  And the integral hinge formation part 27 and the integral hinge formation part 27a make the side edge line which the integral hinge formation parts 27 and 27a mutually oppose in the state which closed the upper mold | type 21 and the lower mold | type 22. Is formed. In the present embodiment, the cuts formed in the predetermined section K between the upper integral hinge 8 and the lower integral hinge 10 on the side edge lines of the integral hinge forming portions 27 and 27a as shown in FIG. Cutting blades 29 and 29a for processing the portion 11 are formed.

  7 and 11, a cutting blade 26 for separating the door portion 5 from the main body portion 4M is provided between the upper die 21 and the lower die 22. In this embodiment, both ends of the cutting blade 26 are located on both sides of the integral hinge forming portion 27 and arranged in a U shape in plan view, and the upper blade 26U formed on the upper die 21 and the lower blade A lower blade 26L formed on the mold 22.

  Thus, in the present embodiment, the door mold cavity 23D is formed in the portion surrounded by the cutting blade 26 and the integral hinge forming section 27 in a state where the upper mold 21 and the lower mold 22 are closed. It will be.

  As shown in FIG. 5, the upper die 21 and the lower die 22 are formed with a number of vacuum suction holes 20 a for vacuum forming a front side sheet material 16 and a back side sheet material 17 which will be described later.

  Hereinafter, a method for forming the vehicle deck board 4 will be described.

(First step)
First, the front-side sheet material 16 and the back-side sheet material 17 made of a thermoplastic resin, which are uniformly molded in a predetermined thickness in advance, are heated and softened.

(Second step)
Next, the back side sheet material 17 is arranged above the lower mold 22. Then, the back side sheet material 17 is vacuum-shaped into the shape of the inner surface of the lower die 22 (the shape of the lower door portion molding surface and the shape of the lower body portion molding surface) while the lower die 22 is vacuum-sucked. A non-woven fabric or the like may be interposed between the lower mold 22 and the back side sheet material 17.

(Third step)
Next, the foamed resin (lifting cross-linking material) 12 and the reinforcement (reinforcing member) 13 are disposed at a predetermined position above the back-side sheet material 17 that is vacuum-shaped to the shape of the inner surface of the lower mold 22.

  In addition, you may use what formed the foamed resin so that the outline shape may follow the outline shape of the deck board 4 for vehicles as a raising bridge material. And when using this foamed resin, when it is necessary to reinforce the vehicle deck board 4 with the reinforcement 13, a part where the foamed resin reinforcement 13 is arranged is cut out, or a groove or a through hole is formed in the part. It is preferable to provide.

  Moreover, various shapes can be adopted as the foamed resin. For example, the foamed resin may be disposed only on a part (for example, the main body) of the vehicle deck board 4 and a hollow part may be provided on the other (for example, the door).

  Next, the surface side sheet material 16 is disposed above the foamed resin 12 and the reinforcement 13 disposed above the back surface side sheet material 17 (the upper surface of the foamed resin 12 and the reinforcement 13). That is, the foamed resin 12 and the reinforcement 13 are interposed between the back side sheet material 17 and the front side sheet material 16. At this time, the upper mold 21 is disposed above the surface side sheet material 16. The upper mold 21 may be disposed above the front side sheet material 16 after the foamed resin 12 is interposed between the back side sheet material 17 and the front side sheet material 16.

  And the nonwoven fabric raw material 18 as a coating | covering material is arrange | positioned so that it may interpose between the surface side sheet raw material 16 and the upper mold | type 21. FIG.

(Fourth process)
Next, the upper die 21 and the lower die 22 are respectively clamped while being vacuum sucked, so that the nonwoven fabric material 18 and the surface side sheet material 16 disposed above the foamed resin 12 and the reinforcement 13 are vacuum sucked into the upper die 21. However, the shape of the inner surface of the upper die 21 (the shape of the upper door molding surface or the shape of the upper body molding surface) is vacuum-shaped. At the same time, the front-side sheet material 16 and the back-side sheet material 17 disposed between the upper mold 21 and the lower mold 22 and the front-side sheet material 16 and the back-side sheet material 17 are disposed so as to be interposed therebetween. While fixing the foamed resin 12 and the reinforcement 13 together, the peripheral portions of the front side sheet material 16 and the back side sheet material 17 and the parts along the cutting line CL of the front side sheet material 16 and the back side sheet material 17 Weld. Thereafter, the outer periphery of the welded peripheral portion is cut off by peripheral cutting blades 28 and 28a provided on the upper die 21 and the lower die 22, respectively, and the door is cut along the cutting line CL by the upper blade 26U and the lower blade 26L. The part is cut and raised to form a laminated member (laminated member) 30 with a raised cross-linking material. During clamping, an upper integral hinge 8 and a lower integral hinge 10 are formed, and a cutting blade 29, between the upper integral hinge 8 and the lower integral hinge 10, The cutting part 11 cut | disconnected by 29a is formed.

  Furthermore, in this embodiment, the peripheral part of the nonwoven fabric material 18 is also welded to the welding part of the back surface side sheet material 17 and the surface side sheet material 16.

  At this time, the nonwoven fabric material 18 is bonded to the surface of the surface side sheet material 16 by a so-called anchor effect.

(Fifth step)
The upper mold 21 and the lower mold 21 and the lower mold 21 are vacuum-sucked, that is, the back-side sheet material 17 and the front-side sheet material 16 are vacuum-sucked by the lower mold 22 and the upper mold 21, respectively. The air blow pin 24 is provided inside the laminated member (laminated member) 30 including the raised cross-linking material welded by clamping the die 22 (in this embodiment, the side wall portion 4a of the main body portion 4M and the side wall portion 5a of the door portion 5). By inserting and injecting compressed air into the laminated member (laminated member) 30 with the raised cross-linked material and blow-molding, the hollow molded body (hollow laminated plate) 15 with the raised cross-linked material is formed.

  Finally, the formed hollow molded body 15 with a raised cross-linking material is precooled between the upper mold 21 and the lower mold 22 and taken out from the upper and lower molds 21 and 22.

  However, the vehicle deck board 4 when taken out from the upper and lower molds 21 and 22 is in a state in which the door portion 5 falls into the opening 9 as shown in FIG.

  At this time, since the relationship between the door 5 and the opening 9 is L1> L2, the removed door 5 is in a normal state, that is, the door 5 is positioned above the opening 9. I can't.

  However, in the present embodiment, it is located on a substantially extended line of the upper integral hinge 8 in a plan view, the lower integral hinge 10 is centered on the back surface sheet 7 side of the main body 4M, and the lower integral hinge 10 is centered. Since the main body portion 4M is formed so as to be rotatable on the back surface side, the main body portion 4M is rotated to the back surface side, so that the surface of the main body portion 4M is spaced from the lower integral hinge 10 in the thickness direction with a predetermined interval (≈S). The upper integral hinge 8 provided on the side sheet 6 side can be moved away from the inner edge 4E of the opening 9.

  Therefore, as shown by a two-dot chain line in FIG. 8, when the removed main body portion 4M is rotated to the back side (downward in FIG. 8) around the lower integral hinge 10, the upper integral hinge is accordingly accompanied. 8 moves from point P to point Q. Then, the door portion 5 moves forward (leftward in FIG. 8) by the horizontal distance X between P-Q as the upper integral hinge 8 moves, and the cut-and-raised tip portion 5S of the door portion 5 opens the opening portion 9. The door part 5 can be easily rotated to the upper side of the opening part 9 without interfering with the inner edge 4E. At this time, the movement amount X of the upper integral hinge 8 is set to be larger than the overlap amount d between the cut and raised tip portion 5S of the door portion 5 and the inner edge 4E of the opening portion 9.

  Thus, the vehicle deck board 4 shown in FIG. 3 is formed.

  The back side sheet material 17 may be vacuum-sucked by the upper mold 21 and the front-side sheet material 16 may be vacuum-sucked by the lower mold 22.

  According to the above-described embodiment, when the body portion 4M is blow-molded in the mold 20, the door portion 5 is molded in the mold 20 while being inclined by the predetermined angle α with respect to the body portion 4M. The length L1 of the door part 5 can be formed longer than the length L2 of the opening part 9 of the door part 5. For this reason, the cut-and-raised tip portion 5S of the door portion 5 overlaps the inner edge 4E of the main body portion 4M by a predetermined amount d, so that the door portion 5 has the opening portion 9 on the vehicle deck board 4 having the door portion 5. A stopper structure can be provided so as not to fall inward.

  Moreover, according to this embodiment, since the vehicle deck board 4 is formed at the same time as the blow molding of the main body portion 4M including the stopper structure of the door portion 5, it can be completed by one processing, and the productivity is improved. Can be achieved.

  Moreover, according to this embodiment, since the foamed resin 12 supporting the front and back side sheets 6 and 7 is disposed between the front side sheet 6 and the back side sheet 7 having a hollow double wall structure, Since the hollow part between the surface side sheet 6 and the back surface side sheet 7 can be filled with the foamed resin 12, the rigidity of the main body part 4M can be increased.

  Furthermore, according to this embodiment, since the reinforcing member 13 is interposed between the front surface side sheet 6 and the back surface side sheet 7, the rigidity of the main body portion 4 </ b> M can be further enhanced by the reinforcing member 13.

  Since the cutting blade 26 for separating the door portion 5 from the main body portion 4M is provided between the upper die 21 and the lower die 22 of the mold 20 for forming the vehicle deck board 4, the upper die 21 and the lower die Since the door 5 can be separated from the main body 4M when the mold 22 is clamped, the door 5 can be cut and raised simultaneously with the blow molding of the main body 4M.

  Further, since the lower mold 22 and the upper mold 21 are provided with hinge forming portions 27 and 27a for forming the upper integral hinge 8 and the lower integral hinge 10 respectively, the respective integrals are simultaneously formed with the blow molding of the main body portion 4M. The hinges 8 and 10 can be formed simultaneously and with a simple configuration.

  Moreover, according to this embodiment, by providing the insertion hole 19a in the side wall part 4a of the main body part 4M of the vehicle deck board 4, the insertion hole 19a becomes inconspicuous and the appearance of the vehicle deck board 4 is improved. Can be made.

  Furthermore, the insertion hole 19b is provided in the side wall part 5a of the door part 5 formed by cutting and raising a part of the main body part 4M of the vehicle deck board 4 with a predetermined shape. The presence of 19b becomes inconspicuous, and the appearance of the vehicle deck board 4 having the door portion 5 can be improved. In particular, blow molding with the door 5 tilted with respect to the main body 4M can expose the side wall 5a of the door 5 surrounded by the main body 4M from the main body 4M. The pin 24 can be easily inserted into the side wall portion 5 a of the door portion 5.

  The preferred embodiment of the present invention has been described above, but the present invention is not limited to the above embodiment, and various modifications can be made.

  For example, in the above embodiment, the foamed resin (thermoplastic resin foam molded body) is exemplified as the raised cross-linking material. However, a molded body in which a synthetic resin sheet or a synthetic resin foam sheet is laminated between two upper and lower metal plates, a vertical wall Embossed shaped molded body having a portion, a honeycomb structure molded body having a vertical wall portion and a vent hole formed in the vertical wall portion, and a lattice-shaped structure molded body having a vertical wall portion and a vent hole formed in the vertical wall portion The present invention can also be carried out using a chip urethane resin molded body, a chip felt molded body, a cardboard molded body and the like. In addition, when using a corrugated-cardboard molded object, it is suitable to use what has a flame retardance.

  In the above embodiment, the two plate portions having the same thickness are used. However, the thicknesses of the two plate portions may be different from each other.

  In this way, the strength of the two plate portions can be changed as necessary. For example, when the strength on the front surface side is necessary, but the strength on the back surface side is not required so much, the plate portion used on the back surface side can be changed. It can be made thinner and lighter.

  In the above-described embodiment, the vehicle deck board is exemplified as the laminated plate. However, the present invention can also be implemented using interior materials and exterior materials for other vehicles and buildings.

1 is a plan view of a vehicle deck board according to an embodiment of the present invention. The perspective view of the deck board for vehicles in which the door part concerning one Embodiment of this invention is in an open state. AA sectional drawing of FIG. BB sectional drawing of FIG. It is sectional drawing which shows the state which vacuum-sucked the back side sheet | seat raw material concerning one Embodiment of this invention to the lower mold | die, Comprising: Sectional drawing of the part corresponding to the AA line of FIG. It is sectional drawing which shows the state which clamped the vehicle deck board with the upper mold | type and lower mold | type concerning one Embodiment of this invention, Comprising: Sectional drawing of the part corresponding to the AA line of FIG. It is sectional drawing which shows the state which isolate | separated the upper mold | type and lower mold | type concerning one Embodiment of this invention up and down, Comprising: Sectional drawing of the part corresponding to the AA line of FIG. It is sectional drawing which shows the vehicle deck board of the state taken out from the metal mold | die concerning one Embodiment of this invention, Comprising: Sectional drawing of the part corresponding to the AA line of FIG. CC sectional drawing of FIG. It is sectional drawing of the metal mold | die in the state which closed the upper mold | type and lower mold concerning one Embodiment of this invention, Comprising: Sectional drawing of the part corresponding to the CC line | wire of FIG. It is sectional drawing which shows the state which isolate | separated the upper mold | type and lower mold | type concerning one Embodiment of this invention up and down, Comprising: Sectional drawing of the part corresponding to the DD line | wire of FIG. FIG. 2 is a cross-sectional view illustrating a state in which a vehicle deck board is clamped with an upper mold and a lower mold according to an embodiment of the present invention, and is a cross-sectional view of a portion corresponding to the line DD in FIG. 1.

Explanation of symbols

d Overlap amount 4 Vehicle deck board 4M Main body 4E Inner edge 5 Door 5S Cut-and-raised tip 6 Front side sheet (plate)
7 Back side sheet (plate part)
8 Upper Integral Hinge 9 Opening 10 Lower Integral Hinge 11 Cut Part 12 Foam Resin (Raised Cross-linking Material)
13 Reinforce (Reinforcement member)
15 Hollow molding 16 Front side sheet material 17 Back side sheet material 18 Non-woven material 20 Mold 21 Upper mold 22 Lower mold 23 Cavity 23D Door molding cavity 23M Body molding cavity 23Mf Front body molding cavity 23Mr Rear body molding Cavity 27 Integral Hinge Forming Section (First Integral Hinge Forming Section)
27a Integral hinge forming part (second integral hinge forming part)
30 Laminated members

Claims (5)

A main body portion in which the ends of two thermoplastic resin plate portions are welded together, and a door portion obtained by cutting and raising a part of the main body portion with a predetermined shape,
A laminated board formed as a hollow double wall structure by blow molding the two plate parts arranged in the front and back direction with a predetermined interval using an upper mold and a lower mold,
The door portion is provided with a first hinge portion as a cut and raised base on one surface side of the front and back surfaces of the main body portion, and is cut and raised on the opposite side of the first hinge portion. Is formed,
The laminated board characterized in that the cut and raised front end portion of the door portion overlaps with the inner edge of the main body portion facing the cut and raised front end portion by a predetermined amount.   The laminated board according to claim 1, wherein at least one of a raised cross-linking material and a reinforcing member is disposed between the two plate portions. A blow molding die comprising an upper die and a lower die for blow-molding a laminate having a main body portion and a door portion in which a part of the main body portion is cut and raised with a predetermined shape,
With the upper mold and the lower mold closed, a main body molding cavity, and a door molding cavity provided on the inner peripheral side of the main body molding cavity,
The bottom surface portion of the door molding cavity is inclined with respect to the bottom surface portion of the main body molding cavity, and the top surface portion of the door molding cavity is with respect to the top surface portion of the main body molding cavity. A blow molding die, which is inclined in the same direction as the inclination direction of the bottom surface portion of the door molding cavity. A first integral hinge forming portion extending in a predetermined direction is projected at the boundary between the second door portion molding surface and the second body portion molding surface of the lower mold,
With the upper mold and the lower mold closed, the second integral hinge forming part extending in the predetermined direction protrudes substantially on the extension line of the first integral hinge forming part. Established,
The blow molding die according to claim 3, wherein a side ridge line of the first integral hinge forming portion and a side ridge line of the second integral hinge forming portion are in contact with each other. A laminated plate having a main body and a door part of which is cut and raised with a predetermined shape, with the upper die and the lower die closed, and a main body forming cavity and the main body forming A method for producing a laminated board that is blow-molded using a mold that is provided on the inner peripheral side of the cavity and has a door-forming cavity that is inclined with respect to the body-forming cavity,
A first step of heat-softening two thermoplastic resin plates;
A second step in which one of the two thermoplastic resin plates softened by heating is vacuum-formed into the inner shape of the lower mold while vacuum sucking the lower mold;
A third step of disposing the other thermoplastic resin plate heat-softened above the one thermoplastic resin plate;
A fourth step of forming a laminated member by welding the peripheral portions of the two thermoplastic resin plates by clamping the upper mold and the lower mold while vacuuming each;
A fifth step of injecting compressed air into the laminated member to shape the inner surface of the mold into a hollow laminated plate;
The manufacturing method of the laminated board characterized by having.

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