JP2011037046A - Vacuum molding apparatus, protrusion molding method, and molded article having protrusion - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vacuum molding apparatus that forms partial protrusions without faults, a protrusion molding method, and a molded article having protrusions. <P>SOLUTION: When negative pressure is supplied to each small hole 252 of a mold 172 and the mold 172 is lowered toward a softened base material 162, the base material 162 is sucked and adhered to the mold 172 by the generated negative pressure. By this, the base material 162 is deformed according to the uneven shape of the mold 172. The base material is held in that state for a prescribed period of time, and then, the base material 162 is separated from the mold by blowing out air from each small hole 252. On that occasion, each top surface 76, 95 of each engaging part 73 and each part 92 to be engaged of the base material 162 is urged by air blown out of the small holes 252 of first/second protrusion forming parts 242, 262 of the mold 172. Consequently, demolding is executed by moving each engaging part 73 and each part 92 to be engaged in their extending directions. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a vacuum molding apparatus and a convex molding method for forming a molded product having a partial convex portion, and a molded product having a convex portion.

  Conventionally, a package formed of a transparent plastic is known as a case body for housing a product (see, for example, Patent Document 1).

  This package is configured to be used by folding the package body, and is formed with a front surface configuration portion that configures the front surface side in a folded state and a rear surface configuration portion that configures the rear surface side.

  A product accommodating portion is recessed in a portion facing the front component and the rear component, and a product accommodating portion formed in the front component and a product accommodating portion formed in the rear component. It is comprised so that a product can be accommodated in the accommodation space formed by.

  In addition, an engagement recess is formed in the flange portion constituting the upper side of the rear surface constituent portion, and a bottomed cylindrical engagement convex portion is formed in the flange portion constituting the upper side of the front surface constituent portion. Is formed.

  As a result, in a state where the product is accommodated in the accommodation space and the front surface configuration portion is overlapped with the rear surface configuration portion, the engagement convex portion of the front surface configuration portion becomes the engagement concave portion of the rear surface configuration portion. It is configured to fit and engage, and by forming this engaged state, the product can be maintained in a state of being held between the front surface configuration portion and the rear surface configuration portion. ing.

  When molding this package, a vacuum molding apparatus is used (see, for example, Patent Documents 2 to 4).

  When the package is molded by such a vacuum molding apparatus, the thermoplastic plastic sheet is heated and softened, and is placed on a mold having irregularities formed thereon. In this state, negative pressure is supplied from a small hole opened on the mold surface, and the plastic sheet is brought into close contact with the mold surface by the negative pressure generated between the plastic sheet and the mold, whereby the plastic sheet is An uneven shape corresponding to the mold is formed.

  And it is comprised so that the said package with the unevenness | corrugation formed in the surface can be formed by ejecting air from the said small hole and removing the said plastic sheet from the said metal mold | die.

JP 2009-001341 A JP 62-101417 A JP 05-212781 A JP 2002-144414 A

  However, in such a conventional package, the engaging convex portion is formed in a bottomed cylindrical shape, and the height dimension that can be formed is limited.

  That is, when the height dimension of the engagement convex portion is set high, the engagement convex portion is not easily removed from the mold, and so-called catching occurs. For this reason, when the air is blown onto the plastic sheet and removed from the mold, the plastic sheet is inclined.

  In this case, if the engagement convex part inclines with respect to the flange part and is solidified in this state, the fitting state into the engagement concave part is deteriorated.

  The present invention has been made in view of such a conventional problem, and provides a vacuum molding apparatus and a convex molding method capable of forming a partial convex portion without a defect, and a molded product having the convex portion. It is intended to do.

  In order to solve the above problems, in the vacuum forming apparatus according to claim 1 of the present invention, the base material softened by supplying a negative pressure between the base material and the mold is closely attached to the mold, In a vacuum forming apparatus for forming a molded product having a partial convex portion, a convex forming portion that protrudes or recedes to form the convex portion is provided on the surface of the mold, and the convex forming portion A small hole for ejecting fluid was provided at the top or bottom.

  That is, the surface of the mold for molding the molded product is provided with a protruding or recessed convex forming portion for forming a partial convex portion on the molded product. A small hole for ejecting fluid is provided at the bottom.

  For this reason, when removing a molded product in which a partial convex portion is formed from the mold, by ejecting fluid from the small hole at the top or bottom of the convex forming portion, The top can be energized.

  As a result, the molded product in close contact with the mold is biased by the fluid ejected to the top surface of the convex portion, and the portion where the convex portion is formed is separated from the mold.

  In the vacuum forming apparatus according to a second aspect of the present invention, a guide groove for guiding the fluid ejected from the small hole to the periphery is formed on the top or the bottom where the small hole is formed.

  That is, the fluid ejected from the small hole can be guided along the peripheral wall surface of the convex portion after being guided to the peripheral edge by the guide groove formed in the top portion or the bottom portion.

  Thereby, the said fluid can be flowed between the surrounding wall surface of the said convex part, and the contact surface of the said metal mold | die.

  Moreover, in the convex part shaping | molding method of Claim 3 of this invention, the metal mold | die surface is carried out by closely_contact | adhering the said base material softened by supplying a negative pressure between a base material and a metal mold | die. In the convex part molding method of forming a partial convex part on a molded product by the convex part formed protruding or receding to the top part or the top part of the convex part when removing the base material from the mold A fluid is ejected from a small hole provided in the bottom.

  That is, when forming a molded product, the base material softened by supplying a negative pressure between the base material and the mold is brought into close contact with the mold, and the convex or convex formed on the mold surface is formed. A partial convex part is formed in the molded product by the shape forming part.

  When removing this molded product from the mold, fluid is ejected from a small hole provided in the top or bottom of the convex forming portion. Then, the top surface of the convex portion is urged by the ejected fluid, and in the molded product that is in close contact with the mold, the formation portion of the convex portion is separated from the mold.

  Furthermore, in the convex part shaping | molding method of Claim 4, the fluid ejected from the said small hole is guided to a periphery by the guide groove formed in the said top part or the said bottom part.

  That is, when the molded product is removed from the mold, the fluid ejected from the small hole is guided to the peripheral edge by the guide groove formed in the top part or the bottom part, and thereby is formed on the peripheral wall surface of the convex part. It is possible to flow along.

  Thereby, the said fluid can be flowed between the surrounding wall surface of the said convex part, and the contact surface of the said metal mold | die.

  Further, in the molded product having the convex portion according to claim 5 of the present invention, the softened base material is brought into close contact with the mold by negative pressure, and is projected or retracted on the mold surface. In a molded product having a convex part in which a partial convex part is formed, fluid from a small hole provided in the top part or the bottom part of the convex forming part when removing the base material from the mold A rib was formed on the top surface of the convex portion by a guide groove for guiding to the periphery.

  That is, when the softened base material is brought into close contact with the mold by negative pressure, a partial convex portion is formed on the molded product by the convex-shaped forming portion protruding or receding from the mold surface.

  When the molded product is removed from the mold, fluid is ejected from a small hole provided in the top or bottom of the convex forming portion. As a result, the top surface of the convex portion is urged by the ejected fluid, and in the molded product that is in close contact with the mold, the formation portion of the convex portion is separated from the mold.

  At this time, the fluid ejected from the small hole is guided to the periphery by a guide groove formed in the top or the bottom, and can flow along the peripheral wall surface of the protrusion. The fluid can flow between a peripheral wall surface and a contact surface of the mold.

  In the molded product formed in this way, a rib is formed on the top surface of the convex portion by the guide groove for guiding the fluid from the small hole to the periphery.

  Thereby, the top surface is reinforced by the ribs. In addition, by forming a rib on the top surface, the depression formed by the small hole can be suppressed.

  As described above, in the vacuum forming apparatus according to the first aspect of the present invention, when the molded product on which the partial convex portion is formed is removed from the mold, the top portion of the convex shape forming portion of the mold or The top surface of the convex portion can be urged by the fluid ejected from the small hole at the bottom.

  Thereby, since the formation part of the said convex part can be separated from the said metal mold | die, the said convex part can be moved to the extension direction, and can be die-cut.

  For this reason, when the molded product is removed from the mold, so-called catching of the convex portion to the mold occurs, and the formed convex portion is compared with the conventional case in which the mold release direction is inclined. Problems such as solidification in an inclined state can be solved.

  Therefore, it is possible to form a partial convex portion without any problem and to set the height dimension of the convex portion high.

  Further, in the vacuum forming apparatus according to claim 2, after the fluid ejected from the small hole is guided to the periphery by the guide groove formed in the top portion or the bottom portion, the fluid is passed along the peripheral wall surface of the convex portion. By flowing, the fluid can flow between the peripheral wall surface of the convex portion and the contact surface of the mold.

  Thereby, it is possible to further easily release the convex portion from the mold.

  Moreover, in the convex part molding method according to claim 3 of the present invention, when the molded product is removed from the mold, the fluid is ejected from a small hole provided at the top or bottom of the convex forming part of the mold. Thus, the top surface of the convex portion can be urged by the ejected fluid.

  Thereby, since the formation part of the said convex part can be separated from the said metal mold | die, the said convex part can be moved to the extension direction, and can be die-cut.

  For this reason, when the molded product is removed from the mold, so-called catching of the convex portion to the mold occurs, and the formed convex portion is compared with the conventional case in which the mold release direction is inclined. Problems such as solidification in an inclined state can be solved.

  Therefore, it is possible to form a partial convex portion without any problem and to set the height dimension of the convex portion high.

  Furthermore, in the convex part shaping | molding method of Claim 4, after guiding the fluid ejected from the said small hole to the periphery by the guide groove formed in the said top part or the said bottom part, along the surrounding wall surface of the said convex part By making it flow, the fluid can flow between the peripheral wall surface of the convex portion and the contact surface of the mold.

  Thereby, it is possible to further easily release the convex portion from the mold.

  Further, in the molded product having the convex portion according to claim 5 of the present invention, when the molded product is removed from the mold, it is provided on the top or bottom of the convex forming portion of the mold. By ejecting the fluid from the small hole, the top surface of the convex portion can be urged by the ejected fluid.

  Thereby, since the formation part of the said convex part can be separated from the said metal mold | die, the said convex part can be moved to the extension direction, and can be die-cut.

  For this reason, when the molded product is removed from the mold, so-called catching of the convex portion to the mold occurs, and the formed convex portion is compared with the conventional case in which the mold release direction is inclined. Problems such as solidification in an inclined state can be solved.

  Therefore, it is possible to form a partial convex portion without any problem and to set the height dimension of the convex portion high.

  At this time, after the fluid ejected from the small hole is guided to the periphery by the guide groove formed in the top part or the bottom part, the fluid is made to flow along the peripheral wall surface of the convex part. The fluid can flow between a peripheral wall surface and a contact surface of the mold.

  Thereby, it is possible to further easily release the convex portion from the mold.

  In the molded product thus formed, a rib can be formed on the top surface of the convex portion by the guide groove for guiding the fluid from the small hole to the periphery.

  Thereby, the top surface can be reinforced by the ribs. Further, by forming a rib on the top surface, it is possible to prevent the depression formed by the small holes from being exposed, and to improve the appearance quality.

It is a top view which shows one embodiment of this invention. It is a side view of the embodiment. It is explanatory drawing which shows the usage example of the embodiment, (a) is explanatory drawing just before forming a closed state, (a) is explanatory drawing which shows the state which formed the closed state. It is a schematic diagram which shows the vacuum forming apparatus of the embodiment. It is explanatory drawing which shows the shaping | molding apparatus of the embodiment. It is a top view which shows each convex-shaped formation part of the embodiment.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

  FIG. 1 is a view showing a package 1 which is a molded product having a convex portion according to the present embodiment, and the package 1 accommodates a product.

  As shown in FIGS. 1 and 2, the package body 11 of the package 1 is formed of a colorless and transparent plastic sheet having a predetermined rigidity, and a rectangular plastic sheet is formed by vacuum molding.

  The package body 11 is provided with a first fold line 21 and a second fold line 22 which are provided substantially parallel to the central portion so as to be able to bend around the fold lines 21 and 22. It is configured. A portion on the right side in FIG. 2 from the first folding line 21 constitutes a front surface forming portion 24 that forms the front surface 23 side of the package 1 in an upright state (see FIG. 3). The left portion in FIG. 2 constitutes a rear surface configuration portion 26 that forms the rear surface 25 side of the package 1 in an upright state (see FIG. 3). Further, a portion between the first folding line 21 and the second folding line 22 constitutes a bottom part forming part 27 that forms a bottom part in a state where the front face forming part 24 and the rear surface forming part 26 are raised.

  The bottom component 27 is formed in a mountain shape having a front slope 31 and a rear slope 32, and a flat portion 33 formed flat is formed on a part thereof. As shown in FIGS. 2 and 3, the front surface component 24 is formed with a front-side inclined surface 34 extending along the front inclined surface 31 in a standing state on the base end side, and the rear surface component A rear surface side inclined surface 35 extending along the rear inclined surface 32 in an upright state is formed on the proximal end side.

  As a result, as shown in FIG. 3, the front surface component 24 and the rear surface component 26 are substantially perpendicular to the bottom component 27 with the front surface component 24 and the rear surface component 26 standing. It is configured to be able to stand up.

  As shown in FIGS. 1 to 3, a front bulging portion 41 that protrudes to the front side is formed bulging in the front surface constituting portion 24, and the rear surface constituting portion 26 that faces the front bulging portion 41 is formed. A rear bulge portion 42 that protrudes rearward is bulged and formed in this part. Accordingly, as shown in FIG. 3, the front surface bulging portion 41 formed on the front surface constituting portion 24, the rear surface bulging portion 42 formed on the rear surface constituting portion 26, and the bottom portion constituting portion 27 are formed. The product is stored and held in a storage space 43 surrounded by the flat portion 33 formed.

  A flat front flange portion 51 is formed on the outer peripheral portion of the front bulge portion 41 in the front surface configuration portion 24, and a flat surface is formed on the outer peripheral portion of the rear bulge portion 42 of the rear surface configuration portion 26. A rear flange portion 52 is formed. Accordingly, as shown in FIG. 3, the front flange portion 51 of the front surface component portion 24 and the rear flange surface of the rear surface portion 26 with the front surface portion 24 and the rear surface portion 26 standing up. It is comprised so that the part 52 may face.

  As shown in FIGS. 1 and 2, a horizontally elongated extending piece 61 extends from the edge on the free end side of the front component 24, and extends to the base end of the extending piece 61. The upper folding line 62 which crosses along the said front surface structure part 24 is formed of the U-shaped groove. Thereby, as shown in FIG. 3A to FIG. 3B, the extending piece 61 can be bent along the upper folding line 62 and arranged along the rear surface constituting portion 26. Has been.

  As shown in FIG. 1, a first elliptical hole 71 is formed in the central part of the base end side of the extension piece 61, and the extension piece 61 avoids the first elliptical hole 71. Thus, a rectangular immersing portion 72 extending in the width direction of the extending piece 61 is formed so as to dip toward the outer surface side.

  Engaging portions 73 and 73 that are a pair of convex portions are formed in the immersing portion 72 so as to bulge from the bottom surface 74 of the immersing portion 72 toward the inner surface side. A cylindrical peripheral wall surface 75 and a top surface 76 bridged on the upper edge of the peripheral wall surface 75 are formed in a bottomed cylindrical shape. The top surface 76 is formed with U-shaped grooves retreated inwardly in the vertical and horizontal directions, and the top surface 76 is formed with a cross-shaped engaging portion side reinforcing rib 77 intersecting at the center.

  A second ellipse hole 81 is opened at a position where the first ellipse hole 71 coincides with the portion of the rear flange portion 52 of the rear surface component 26 that overlaps in a state where the extension piece 61 is folded back. A circular hole 82 is formed in the front flange portion 51 of the front structure 24 where the elliptical holes 71 and 81 face each other.

  Thus, a suspension hole penetrating in the front-rear direction is formed by the circular hole 82 and the elliptical holes 71, 81, and the package 1 is used as a display hook by using the suspension hole. It is configured so that it can be locked.

  A side of the rear flange portion 52 of the rear surface constituent portion 26 where the extending piece 61 overlaps, that is, a portion on the free end side of the rear surface constituent portion 26 is laterally arranged so as to avoid the second elliptical hole 81. A rectangular projecting portion 91 extending in the direction is formed to bulge toward the outer surface, and the height of the projecting portion 91 increases from the distal end portion to the proximal end portion of the rear surface constituting portion 26. Inclined to be higher. The protruding portion 91 is formed in a shape that can be fitted into the immersive portion 72 formed in the extending piece 61, and can be engaged with the protruding portion 91 in a state in which the protruding portion 91 is fitted into the immersive portion 72. It is configured as follows.

  In addition, engaged portions 92 and 92 that are a pair of convex portions are formed in the protruding portion 91 so as to be immersed from the stepped surface 93 of the protruding portions 91 and 91 toward the inner surface side. The portions 92 and 92 are formed in a cylindrical shape with a bottom by a cylindrical peripheral wall surface 94 and a top surface 95 bridged to the upper edge of the peripheral wall surface 94.

  As shown in FIG. 3B, the engaged portions 92 and 92 are provided at positions that match the engaging portions 73 and 73 of the extended piece 61 that is folded back, The engaging portions 73 and 73 are configured to be engaged with each other in a state where the engaging portions 73 and 73 are fitted in the corresponding engaged portions 92 and 92.

  Thereby, it is comprised so that the said front surface structure part 24 and the said rear surface structure part 26 can be couple | bonded by the free end part, and the product accommodated in the said accommodation space 43 can be hold | maintained in the said package 1 now. It is configured.

  Moreover, by setting it as such an engagement structure, the peripheral part of the said front structure part 24 can be maintained in a flat state. For this reason, the flat portion can be used as the display area 101 by sandwiching a cardboard printed on the inside of the flat portion or by printing on the flat portion.

  The top surface 95 of each of the engaged portions 92, 92 is formed with U-shaped grooves that retreat inwardly in the vertical and horizontal directions, and the top surface 95 has a cross-shaped engaged shape that intersects at its center. Part-side reinforcing ribs 111 are formed.

  FIG. 4 is a schematic diagram showing a vacuum forming apparatus 151 used when manufacturing the package 1.

  This vacuum forming apparatus 151 includes a heating device 163 that heats a base material 162 made of a thermoplastic film drawn out from a raw fabric roll 161, and passes through the base material 162 through an upper heater 164 and a lower heater 165. It can be heated and softened from above and below.

  A molding device 171 is provided on the downstream side of the heating device 163, the base material 162 softened by the heating device 163 is deformed by a mold 172, and the prototype of the package 1 is changed to the base material 162. It is comprised so that it can form continuously.

  A puncher 181 is provided on the downstream side of the molding device 171, and the package 1 is obtained by punching the base material 162 in which the shape of the package 1 is continuously formed with a punching die 182. Has been.

  As shown in FIG. 5, the mold 172 includes a bottom portion forming portion 233 for forming the mountain-shaped bottom portion forming portion 27 on the package body 11 on the surface 232, and the front surface forming portion 24. A front bulge portion forming portion 234 for forming the front bulge portion 41, a rear bulge portion forming portion 235 for forming the rear bulge portion 42 in the rear surface constituent portion 26, and the like are formed in irregularities. Yes.

  At the left end of the mold 172 in FIG. 5, an immersion portion forming portion 241 for forming the immersion portion 72 and a first protrusion for forming the engaging portions 73, 73 in the immersion portion 72. A shape forming portion 242 is formed, and the first convex shape forming portion 242 is formed in a cylindrical shape. The first convex formation part 242 has a large difference in height by being formed in the immersion part formation part 241.

  The first convex forming portion 242 is formed in a local convex shape with a peripheral wall standing substantially vertically and having no draft taper. When forming a local convex shape without such a setting of a taper taper in a mold 172 of a general vacuum forming apparatus, an upper limit value of the height dimension is determined, and the first convex forming portion 242 is set to a height dimension that exceeds this upper limit value.

  As shown in FIG. 6, a small hole 252 is formed in the top portion 251 of the first convex forming portion 242 so that air can be taken in and out of the small hole 252. The top portion 251 is formed with a cross-shaped guide groove 256 including a longitudinal groove 253 and a transverse groove 254 intersecting with the small hole 252 as a center, and the air ejected from the small hole 252 can be guided to the periphery. It is configured as follows.

  Further, at the right end portion of the mold 172 in FIG. 5, a protruding portion forming portion 261 for forming the protruding portion 91 and an engaged portion 92, 92 for forming the engaged portions 92, 92 in the protruding portion 91 are formed. A second convex forming portion 262 is formed, and the second convex forming portion 262 is formed in a columnar shape. The second convex forming portion 262 has a large height difference by being formed in the protruding portion forming portion 261.

  The second convex shape forming portion 262 is formed in a local convex shape having a peripheral wall standing substantially vertically and having no draft taper. When forming a local convex shape without such a setting of the taper taper on a mold 172 of a general vacuum forming apparatus, the upper limit value of the height dimension is determined, and the second convex shape forming portion 262 is set to a height dimension that exceeds this upper limit value.

  As shown in FIG. 6, the second convex forming portion 262 also has a small hole 252 formed in the top portion 251, and is configured so that air can be taken in and out from the small hole 252. The top portion 251 is formed with a cross-shaped guide groove 256 including a longitudinal groove 253 and a transverse groove 254 intersecting with the small hole 252 as a center, and the air ejected from the small hole 252 can be guided to the periphery. It is configured as follows.

  In the present embodiment, the package main body 11 that is a molded product is provided with the engaging portions 73 and 73 and the engaged portions 92 and 92 that are convex portions that locally protrude toward the upper surface side of the base material 162. However, the present invention is not limited to this, and the mold 172 surface 232 is not limited to this example. Alternatively, the convex forming portions for forming the convex forming portions 242 and 262 may be formed in an immersive manner. In this case, the small hole 252 and the guide groove 256 are formed at the bottom of the convex forming portion.

  Further, as shown in FIG. 5, the small holes 252 for taking in and out air are also formed in the bottom portion forming portion 233, the front bulging portion forming portion 234, the rear bulging portion forming portion 235, and the like. The small holes 252,... Are connected to the air control device 271.

  The air control device 271 is connected to a lifting / lowering device that lifts and lowers the mold 172 and a control device (not shown) that controls the heating device 163, and the small holes 252,... According to a control signal from the control device.・ ・ A negative pressure is supplied to the air to suck air, or a positive pressure is supplied to eject air.

  In the present embodiment having the above-described configuration, when the package 1 is formed using the vacuum forming device 151, the base material 162 drawn from the raw fabric roll 161 is replaced with the upper heater 164 of the heating device 163 and The bottom heater 165 softens by heating from above and below.

  Then, the base material 162 softened by the heating device 163 is deformed by the mold 172 of the molding device 171, and the prototype of the package 1 is continuously formed on the base material 162.

  More specifically, in the molding device 171, after the mold 172 is lowered toward the base material 162 by the lifting device, a negative pressure is applied from the air control device 271 to the small holes 252,. Is configured to supply.

  As a result, a negative pressure is generated between the base material 162 and the mold 172, and the base material 162 is sucked and adhered to the mold 172. At this time, since the base material 162 is softened, the base material 162 is deformed according to the uneven shape formed on the surface 232 of the mold 172.

  In this state, it waits for a predetermined time until the shape of the base material 162 is stabilized.

  Thereafter, a positive pressure is supplied from the air control device 271 to the small holes 252,..., And air is ejected from the small holes 252,. The base material 162 on which the package 1 having an uneven shape is formed by separating the 162 from the mold 172 is removed from the mold 172.

  At this time, on the surface 232 of the mold 172 for molding the package 1, the engaging portions 73 and 73 and the engaged portions 92 and 92 which are local convex portions are formed on the package 1. First and second convex forming portions 242, 242, 262, 262 are formed, and a small hole for ejecting air is formed in the top portion 251 of these convex forming portions 242, 242, 262, 262. 252 ... are provided.

  For this reason, when removing the package 1 which is a molded product in which partial convex portions are formed from the mold 172, the small holes 252 of the convex forming portions 242, 242, 262, 262 are provided. The air can be urged by the air on the top surfaces 76, 76, 95, 95 of the engaging portions 73, 73 and the engaged portions 92, 92 by ejecting air from the.

  Thereby, the package 1 that is in close contact with the mold 172 is urged by the air blown to the top surfaces 76, 76, 95, 95 of the engaging portions 73, 73 and the engaged portions 92, 92, The forming portions of the engaging portions 73 and 73 and the engaged portions 92 and 92 can be separated from the mold 172.

  In this manner, the engaging portions 73 and 73 and the engaged portions 92 and 92 are separated from the mold 172 by separating the engaging portions 73 and 73 and the engaged portions 92 and 92 forming portions. , It can move in its extending direction and die-cut.

  For this reason, when the molded product is removed from the mold, the engagement portion 73 is formed as compared with the conventional case in which the so-called catching of the convex portion to the mold occurs and the mold releasing direction of the molded product is inclined. , 73 and the engaged portions 92, 92 are solidified in a tilted state.

  In particular, in the present embodiment, the bottomed cylindrical engaging portions 73 and 73 projecting upward from both ends of a horizontally long package 1 having a relatively long dimension and the engaged member. The joint portions 92 and 92 are formed, and when normal vacuum forming is performed, so-called catching occurs in either the engaging portion 73 or the engaged portion 92 provided at both ends.

  However, even the package 1 having such a shape is formed in a state of extending straight without bending the engaging portions 73 and 73 and the engaged portions 92 and 92 provided at both ends. be able to. Thereby, at the time of use, the engagement state of the said engaging parts 73 and 73 and the said to-be-engaged parts 92 and 92 can be maintained.

  Therefore, the engaging portions 73 and 73 and the engaged portions 92 and 92 that constitute a partial convex portion can be formed without problems, and the engaging portions 73 and 73 that are engaged with each other in a product state. 73 and the engaged portions 92 and 92 can be reliably prevented from being accidentally detached.

  Moreover, since the height dimension of the engaging parts 73 and 73 and the engaged parts 92 and 92 can be set high, the holding effect of the engaged state can be further enhanced.

  And by the guide groove 256, ... formed in the top part 251, ... of the said convex-shaped formation part 242,242,262,262, the air ejected from each said small hole 252, ... It can be guided to the periphery.

  Accordingly, the air guided to the periphery can flow along the peripheral wall surfaces of the engaging portions 73 and 73 and the engaged portions 92 and 92, and the engaging portions 73 and 73 and the engaged portions are allowed to flow. The air can flow between the peripheral walls of 92 and 92 and the peripheral wall surfaces of the convex forming portions 242, 242, 262 and 262 of the mold 172.

  Therefore, it is possible to further easily remove the mold from the mold 172 at the engaging portions 73 and 73 and the engaged portions 92 and 92.

  The base material 162 on which the shape of the package 1 is continuously formed is punched by a punching die 182 of the puncher 181. Thereby, a plurality of packages 1 are acquired from the base material 162.

  The package 1 thus formed has the engagement portions 73 and 73 and the engaged portions 92 and 92 by the guide groove 256 for guiding the air from the small hole 252 to the periphery. Cross-shaped engagement side and engaged portion side reinforcing ribs 77 and 111 are formed on the top surfaces 76 and 95.

  Thus, the engaging portions 73 and 73 and the engaged portions 92 and 92 can be reinforced by the reinforcing ribs 77 and 111 formed on the top surfaces 76 and 95 thereof.

  Further, by forming the reinforcing ribs 77 and 111 on the top surfaces 76 and 95, the depression formed by the small holes 252,... Can be prevented, and the appearance quality is improved. Can do.

DESCRIPTION OF SYMBOLS 1 Package 11 Package main body 73 Engagement part 76 Top surface 77 Engagement part side reinforcement rib 92 Engagement part 95 Top surface 111 Engagement part side reinforcement rib 151 Vacuum molding apparatus 162 Base material 172 Mold 232 Surface 251 Top part 252 Small hole 256 Guide groove 262 Second convex forming part

Claims (5)

In a vacuum molding apparatus for forming a molded product having a partial convex portion by closely adhering the base material softened by supplying a negative pressure between the base material and the mold,
Protruding formation part which protruded or retreated to form the convex part on the surface of the mold was provided, and a small hole for ejecting fluid was provided on the top part or bottom part of the convex forming part. A vacuum forming device.   The vacuum forming apparatus according to claim 1, wherein a guide groove that guides a fluid ejected from the small hole to a peripheral edge is formed in the top portion or the bottom portion where the small hole is formed. A part of the molded product is partially formed by a convex forming part protruding or retracting on the surface of the mold by closely contacting the mold with the base material softened by supplying a negative pressure between the base material and the mold. In the convex molding method for forming the convex,
A method for forming a convex portion, comprising: ejecting a fluid from a small hole provided in the top portion or the bottom portion of the convex forming portion when removing the base material from the mold.   4. The convex portion molding method according to claim 3, wherein the fluid ejected from the small hole is guided to a peripheral edge by a guide groove formed in the top portion or the bottom portion. In a molded product having a convex portion in which a partial convex portion is formed by a convex-shaped forming portion formed by sticking the softened base material to the die by negative pressure and projecting or receding on the mold surface,
When removing the base material from the mold, ribs are formed on the top surface of the convex portion by guide grooves for guiding fluid from the small holes provided in the top portion or the bottom portion of the convex forming portion to the periphery. A molded product having a convex portion, characterized by forming.

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