JP5087364B2 - Laminate and method for producing the same - Google Patents

Description

  The present invention relates to a blow molded laminate and a method for manufacturing the same.

  Conventionally, as a laminated plate, a thermoplastic parison is extruded from an extrusion head, and the parison is suspended between one mold and the other mold, and an outer skin is formed between the parison and one mold. It is known that a vehicle interior panel is formed by placing a sheet, clamping a mold, introducing a pressure fluid into a parison, and performing blow molding (see, for example, Patent Document 1).

And in this patent document 1, the interior panel for vehicles is blow-molded by inserting a blow pin into one parison and injecting compressed air inside.
JP 2003-071912 A

  However, in such a conventional technique, the insertion hole formed by inserting the blow pin is provided on the front surface or the back surface of the vehicle interior panel. As described above, the conventional technique has a problem that the insertion hole is provided in a conspicuous portion of the vehicle interior panel, and the appearance of the product is deteriorated.

  Then, an object of this invention is to obtain the laminated board which can aim at the improvement of appearance, and its manufacturing method.

In the first aspect of the invention, the end portions of the two thermoplastic resin plate portions are welded to each other, and a laminate including a main body portion that is blow-molded by inserting a blow pin and injecting compressed air therein. The main body is provided with a rotation center on one side of the front and back surfaces of the main body, and a first integral hinge extending in a predetermined direction and a rotation on the other side. And a second integral hinge extending in the predetermined direction. The second integral hinge is provided on a substantially extended line of the first integral hinge in a plan view. In addition, a cutting part is provided between the first integral hinge and the second integral hinge, and an insertion hole for the blow pin is provided in a side wall part of the main body part. It is characterized by that.

  In the invention according to claim 2, in the laminated plate according to claim 1, the main body includes a door cut and raised with a predetermined shape in a part of the main body, and the side wall of the door In addition, an insertion hole for the blow pin is provided.

In the invention of claim 3, 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 with 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 In the conjunction to weld the peripheral edge portions of two thermoplastic resin plate to form a laminated member, a first integral hinge extending in a predetermined direction, substantially on the extension line of the first integral hinge And a second integral hinge extending in the predetermined direction and a cutting portion provided between the first integral hinge and the second integral hinge . And a fifth step of inserting a blow pin from a side wall portion of the laminated member and injecting compressed air into the inner shape of the mold to form a hollow laminated plate. To do.

  According to the first aspect of the present invention, the insertion hole is made inconspicuous by providing the insertion hole in the side wall portion of the laminated plate main body portion that is blow-molded by inserting the blow pin into the inside and injecting compressed air. The appearance of the board can be improved.

  According to the invention described in claim 2, by providing the insertion hole in the side wall portion of the door portion formed by cutting and raising a part of the laminate main body portion with a predetermined shape, the insertion hole is also formed in the door portion. Becomes inconspicuous, and the appearance of the laminate having the door can be improved.

  According to the third aspect of the present invention, the laminate plate is blow-molded using the mold having the door portion forming cavity inclined obliquely with respect to the body portion forming cavity, so that the main body portion of the laminate plate is molded. Since the side wall portion of the door portion provided on the inner peripheral side can be exposed from the main body portion, the blow pin can be easily inserted into the side wall portion of the door portion, so that the laminate can improve the appearance. Can be easily manufactured.

  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 the line AA in FIG. 1, and FIG. 9 is a cross-sectional view showing a state in which the upper mold and the lower mold are separated vertically. FIG. 10 is a cross-sectional view of a portion corresponding to the line CC, FIG. 10 is a cross-sectional view showing a state in which the vehicle deck board is clamped with the upper die and the lower die, and a portion corresponding to the line CC in FIG. FIG.

  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 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 9, 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.

  Further, as shown in FIG. 9 and FIG. 10, the lower mold 22 is provided with a plurality of insertion holes 25 for inserting the plurality of air blow pins 24 into the cavity 23 at required locations.

  Further, an integral hinge forming portion 27 that forms the upper integral hinge 8 protrudes in an inverted V-shaped cross section at a position corresponding to the cut-and-raised base portion BL (see FIG. 2) of the door molding cavity 23D of the lower mold 22. It is installed. Although not shown in the present embodiment, the upper die 21 has an integral hinge forming portion (not shown) that forms the lower integral hinge 10 at both ends of a substantially extended line of the integral hinge forming portion 27. It protrudes so as to extend in the direction.

  7 and 9, a cutting blade 26 that separates 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.

  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.

  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, and 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.

  Moreover, in the said embodiment, although the vehicle deck board which has a door part as a laminated board was illustrated, this invention can be implemented even if it uses the vehicle deck board which does not have a door part.

  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. 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 CC line 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 a line CC in FIG. 1.

Explanation of symbols

4 Vehicle deck board 4a Side wall part 4M Main body part 4E Inner edge 5 Door part 5a Side wall part 6 Surface side sheet (plate part)
7 Back side sheet (plate part)
19a Insertion hole 19b Insertion hole 24 Air blow pin

Claims (3)

A laminate comprising two main body parts made of thermoplastic resin and welded to each other, and provided with a blow molded body by inserting a blow pin into the interior and injecting compressed air,
The main body is provided with a rotation center on one side of the front and back surfaces of the main body, a first integral hinge extending in a predetermined direction, and a rotation center on the other surface. A second integral hinge extending in the predetermined direction,
The second integral hinge is provided on a substantially extended line of the first integral hinge in a plan view,
A cutting portion is provided between the first integral hinge and the second integral hinge;
The laminated board characterized by the insertion hole of the said blow pin being provided in the side wall part of the said main-body part. The main body part includes a door part cut and raised with a predetermined shape in a part of the main body part,
The laminated board according to claim 1, wherein an insertion hole for the blow pin is provided in a side wall portion of the door portion. 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;
The upper mold and the lower mold are each clamped while being vacuum-sucked, whereby the peripheral portions of the two thermoplastic resin plates are welded together to form a laminated member, and the first extending in a predetermined direction. An integral hinge, a second integral hinge provided on a substantially extended line of the first integral hinge and extending in the predetermined direction, the first integral hinge, and the second integral A fourth step of forming a cutting portion provided between the hinge and the hinge ;
A fifth step of inserting a blow pin from the side wall portion of the laminated member, injecting compressed air into the inside and shaping the inner surface of the mold to form a hollow laminated plate;
The manufacturing method of the laminated board characterized by having.

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