JP2006321178A - Container forming apparatus, sheet feeding device, container manufacturing method and sheet feeding method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To mass-produce a container having good appearance and high quality while increasing the on-line manufacturing speed of the container, which is formed by laminating and bonding a thermoplastic sheet to an air permeable container base material even if the thermoplastic sheet is thin. <P>SOLUTION: This container forming apparatus is provided with a mold 520 having a housing part 530 for housing a container base material V1 by its air sucking housing surface 532, a holding member 560 for pressing a thermoplastic sheet S1 to the periphery of the housing part 530 to hold the same, a molding mechanism 600 for sucking air from the housing surface 532 through the container base material V1 to laminate the thermoplastic sheet S1 to the sheet laminating surface V11 of the container base material V1, a trimming mechanism 700 for pressing the thermoplastic sheet S1, which is pressed and held to the holding member 560, by a cutting blade 720 and cutting the same to form the container V20 and a negative pressure releasing means 800 for releasing the negative pressure, which is formed in the space between the thermoplastic sheet S1 and the holding member 560, to atmospheric pressure or below when air is sucked from the housing surface 532. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a container forming apparatus, a sheet conveying apparatus, a container manufacturing method, and a sheet conveying method.

In Patent Document 1, a thermoplastic sheet heated and softened is disposed in an opening of a porous container that is molded and accommodated in a predetermined thermoforming female mold, and the thermoplastic sheet is disposed on the inner surface of the porous container. A thermoplastic sheet coating apparatus for laminating and bonding by thermoforming is described. As thermoforming, differential pressure molding such as vacuum molding, pressure molding or vacuum / pressure molding is used (paragraph 0032 of the same document). The porous container coated with the thermoplastic sheet is transferred to a trimming machine where the uncoated thermoplastic sheet around the flange is trimmed (paragraph 0042 of the same document).
JP 2002-18939 A JP 2004-9698 A

In vacuum / compressed air forming, compressed air is supplied at a pressure higher than atmospheric pressure, but when an ultra-thin thermoplastic film is laminated and bonded to a breathable container base material, heat is applied by laminating and bonding with pressurized air with a large pressure. Since the thickness of the plastic film becomes non-uniform and pin holes are formed in the thermoplastic film, or even if the thickness of the thermoplastic film is constant, pin holes may be generated due to high pressure. Containers that are formed without supply will be of high quality.
In the technique described in Patent Document 1, it takes time to manufacture a container because the porous container coated with the thermoplastic sheet is moved to another place after the thermoplastic sheet is laminated and adhered to the porous container. At the same time, when the thermoplastic sheet is cut at an outer position from the end of the porous container, the cutting position may vary. When the variation in the cutting position occurs in this way, the appearance of the container becomes unsatisfactory, or the processing for protecting the end face of the container becomes difficult.
Therefore, even if a thin thermoplastic film is used, high-quality laminated containers with good appearance can be mass-produced while accelerating the online production of laminated containers in which a thermoplastic film is laminated and bonded to a breathable container substrate. It was sought after.

  In addition, since the technique of patent document 2 is not what laminate | stacks a thermoplastic sheet on a container base material, it cannot solve the said subject. In this document, a heat-softened thermoplastic sheet is pressed and held around a molding surface by a holding member, and the thermoplastic sheet is brought into close contact with the molding surface by differential pressure molding such as vacuum pressure forming to form a molded product. Further, it is described that the periphery of a molded product pressed and held by a holding member is pressed and cut by an annular cutting blade. However, when laminating and adhering a thermoplastic film to a breathable container base material, it is not desirable to supply compressed air with a high pressure from the viewpoint of improving the quality of the container, but if an annular cutting blade is placed around the holding member, The space between the plastic film and the holding member is a closed space, and when vacuum forming is performed without supplying pressurized air, a negative pressure is generated in the space between the thermoplastic film and the holding member, and the thermoplastic film is against the container substrate. May not be in close contact with each other and may not be sufficiently laminated.

The material is foamed and molded into a container shape. The breathable container base material is housed in a metal molding die, and a thermoplastic sheet is laminated on the sheet lamination surface of the container base material by differential pressure molding. When bonding and forming a container, a container base material may be broken. Therefore, even when a thermoplastic sheet is laminated and bonded to a container base that is easily broken, it has been required to prevent the container base from cracking.
Further, when the heat-softened thermoplastic film is laminated on the container base material and trimmed, the scrap film may not be smoothly separated from the grip holding the heat-softened thermoplastic film. Therefore, it has been demanded that the scrap film can be removed smoothly from the grip, the scrap film can be easily collected, and the online production of the container can be accelerated.
Further, when the top film is sealed by sealing the thermoplastic film on the flange portion of the formed container, the top film sometimes does not become flat due to shrinkage of the thermoplastic film due to a temperature drop. Therefore, it has been required to make the top film flat.

The present invention has been made in view of the above problems, and even if the thermoplastic sheet is thin, the appearance is good and high while speeding up the online production of the container in which the thermoplastic sheet is laminated and bonded to the breathable container base material. The goal is to mass produce quality containers.
Another object of the present invention is to prevent cracking of a container base material even when a thermoplastic sheet is laminated and adhered to a container base that is easily cracked, and to improve the yield of the container.
Furthermore, the present invention provides a thermoplastic sheet on a container base material by smoothly separating the scrap sheet from the sheet holding member for holding the heat-softened thermoplastic sheet scrap sheet, facilitating the recovery of the scrap sheet. The purpose is to speed up the online production of stacked containers.
Another object of the present invention is to improve the appearance of a product in which the top film is flattened and the container is provided with the top film.

  In order to achieve the above object, the present invention provides a container forming apparatus for forming a container by laminating and trimming a thermoplastic sheet on a sheet lamination surface of a breathable container base material, and capable of sucking air A molding die having a housing portion for housing the container base material on the housing surface, and a shape that covers the housing portion when close to and away from the housing portion of the molding die are formed. And a holding member capable of pressing and holding the thermoplastic sheet in the heat-softened state disposed in the vicinity of the housing portion around the housing portion in the molding die, the housing portion housing the container base material, and the above The holding member is brought close to the holding member and the thermoplastic sheet in the heat-softened state is pressed and held around the housing portion, and air is sucked from the housing surface through the container base material, thereby the sheet of the container base material. product A molding mechanism for laminating and adhering to the surface, and a cutting blade disposed around at least one of the molding die and the holding member, and pressing the thermoplastic sheet pressed and held by the holding member with the cutting blade A trimming mechanism that cuts and forms the container, and a negative pressure that releases a negative pressure generated in a space between the thermoplastic sheet and the holding member when the air is sucked from the storage surface at a pressure lower than atmospheric pressure. And a release means.

When the housing portion containing the container base and the holding member are brought close to each other by the molding mechanism, the heat-softened thermoplastic sheet is pressed and held around the housing portion by the holding member. Further, air is sucked from the accommodation surface through the container base material, and the thermoplastic sheet is laminated and bonded to the sheet lamination surface of the container base material. By the trimming mechanism, the thermoplastic sheet pressed and held by the holding member is pressed and cut by a cutting blade disposed around at least one of the molding die and the holding member to form a container. Here, the negative pressure generated in the space between the thermoplastic sheet and the holding member when air is sucked from the accommodation surface is released by the negative pressure releasing means below atmospheric pressure.
Since the container base material with the thermoplastic sheet laminated and bonded can be trimmed while being accommodated in the molding die, the container can be manufactured quickly, and the cutting position does not vary and the appearance of the container is good. It becomes easy to perform the process which protects the end surface of a container. Further, since the holding member covers the housing portion when approaching the housing portion and the cutting blade is disposed around the holding member when approaching the housing portion, a space is partitioned between the thermoplastic sheet and the retaining member. The negative pressure in the space is released without supplying compressed air having a pressure higher than the atmospheric pressure, and the thermoplastic sheet is sufficiently laminated and adhered to the sheet lamination surface of the container substrate. In addition, since no pressurized air with a high pressure is supplied, no pinhole is generated in the thermoplastic sheet. Therefore, even if a thin thermoplastic sheet is used, it is possible to mass-produce high-quality containers with good appearance while accelerating online production of containers in which thermoplastic sheets are laminated and bonded to a breathable container substrate. Become.

As the breathable container substrate, a pulp mold, paper, starch, a biodegradable material having a starch foam composition, a porous metal, or the like can be used.
The molding die may be a molding female die having a concave housing surface or a molding male die having a convex housing surface.
When the cutting blade is a Thomson blade, the periphery of the molded product is pressed and cut by a Thomson blade that can be formed into various shapes.

  The negative pressure releasing means is formed through the holding member so as to allow air to pass therethrough, and when the holding member and the housing portion come close to each other, a space between the holding member and the thermoplastic sheet and the outside air May be an air passage connecting the two. Then, the said space is open | released by external air and the negative pressure of the said space is open | released below atmospheric pressure.

  The negative pressure releasing means may include a micro-pressure air supply mechanism that supplies air at a pressure equal to or lower than atmospheric pressure to a space between the holding member and the thermoplastic sheet when the housing portion and the holding member are close to each other. Good. Then, the micro pressure air below the atmospheric pressure is supplied to the space, and the negative pressure in the space is released below the atmospheric pressure.

  The present invention also relates to a container forming apparatus for forming a container by laminating and bonding a thermoplastic sheet to a sheet lamination surface of a breathable container base material in a foamed state in which a material is foamed and formed into a container shape. A metal molding die having an accommodating portion for accommodating the container base material on the accommodating surface capable of sucking, a cushioning material provided on the accommodating surface to reduce the impact force applied to the container base material, A container in which the thermoplastic sheet in a heat-softened state disposed in the vicinity of the accommodating portion is brought into contact with the buffer material by sucking air from the accommodating surface through the foamed container substrate accommodated in the accommodating portion. And a molding mechanism for forming the container by laminating and adhering to the sheet lamination surface of the substrate.

By the molding mechanism, air is sucked from the accommodation surface through the foamed container base housed in the housing section in contact with the buffer material. Then, the heat-softened thermoplastic sheet disposed in the vicinity of the accommodating portion is laminated and adhered to the sheet lamination surface of the container substrate to form a container.
In the foamed state in which the material is foamed and formed into a container shape, the breathable container base material has the property of being easily broken, but even such a fragile container base material is difficult to break, thus improving the production yield of the container. be able to.

Further, the sheet conveying apparatus of the present invention holds and conveys a scrap sheet generated by laminating and bonding a heat-softened thermoplastic sheet to a container base material and cutting it, and releases it at a predetermined sheet releasing position. And a holding part cooling mechanism that cools a portion of the scrap sheet that is held by the sheet holding member.
The holding portion cooling mechanism cools the portion of the conveyed scrap sheet held by the sheet holding member. Then, the plasticity of the portion held by the sheet holding member in the scrap sheet is lowered, the sheet holding member is smoothly separated from the scrap sheet, and the scrap sheet can be easily collected.

Furthermore, the present invention provides a container for forming a container by laminating and trimming a thermoplastic sheet on the sheet lamination surface of a breathable container base having a recess and a flange formed around the recess. When forming the container base material, the forming apparatus is a container base material forming mechanism that forms the container base material having the flange portion that is inclined toward the bottom side and extends outward from the concave portion, and is heated and softened. And a molding mechanism for forming the container having a flange portion that is laminated and adhered to the sheet lamination surface of the container base material and is inclined toward the bottom side and extends outward.
By the molding mechanism, the heat-softened thermoplastic sheet is laminated and adhered to the sheet lamination surface of the container substrate to form a container. The flange portion of the container is inclined toward the bottom side and extends outward. When the top film is sealed by sealing the thermoplastic film on the flange part of the formed container, the flange part is pulled to the side opposite to the bottom side due to the shrinkage of the thermoplastic film due to the temperature drop, and the top film becomes flat. .

  By the way, the same operation and effect can be obtained by the invention of the container manufacturing method and the invention of the sheet conveying method. Of course, the configurations described in claims 2 to 7 and claims 9 to 17 can be made to correspond to these methods.

According to the inventions according to claims 1 and 18, mass production of high-quality containers having a good appearance is achieved while speeding up the online production of a container in which a thermoplastic sheet is laminated and bonded to a breathable container substrate. Is possible.
In the invention according to claim 2, the structure for releasing the negative pressure in the space formed between the thermoplastic sheet and the holding member can be simplified.
In the invention concerning Claim 3, the negative pressure of the space formed between the thermoplastic sheet and the holding member can be released with an appropriate pressure, and the thermoplastic sheet is brought into close contact with the container substrate more reliably. It can be laminated.

In the invention according to claim 4, since the means for releasing the negative pressure can be switched in accordance with the property of the thermoplastic sheet, the property of the container base, and the like, the convenience can be improved.
In the invention according to claim 5, since it is not necessary to move the holding member, the structure for supporting the holding member can be simplified, and the supply mechanism of the container base can be facilitated.
In the invention concerning Claim 6, Claim 15, it becomes difficult to break a container base material, and it becomes possible to improve the production yield of a container.

In the invention according to claim 7, since the temperature of the container base material on which the thermoplastic sheet is laminated and bonded is raised in advance, the adhesive property of the thermoplastic sheet is improved, and the thermoplastic sheet is laminated and bonded to the container base material. Thus, the cycle time for forming the container can be shortened.
In the inventions according to claims 8, 16, and 19, the scrap sheet is smoothly separated from the sheet holding member for holding the heat-softened thermoplastic sheet scrap sheet, and the scrap sheet can be easily collected. Thus, it is possible to speed up the on-line production of a container in which a thermoplastic sheet is laminated on a container base material.
In the invention according to claim 9, since the inner side in the width direction of the scrap sheet is not cooled by the holding portion cooling mechanism, the heat-softened thermoplastic sheet disposed in the vicinity of the accommodating portion has an influence of cooling by the holding portion cooling mechanism. Without being received, the thermoplastic sheet can be laminated and adhered to the container base material with high accuracy.

In the invention according to the tenth aspect, since air is blown only on a portion of the scrap sheet held by the sheet holding member, the heat-softened thermoplastic sheet disposed in the vicinity of the housing portion is supplied with air by the air blowing mechanism. The thermoplastic sheet can be accurately laminated and adhered to the container base without being affected.
In the inventions according to the eleventh and seventeenth aspects, when the top film is formed on the formed container, the top film can be flattened, so that the appearance of the product having the top film on the container can be improved. Become.
In the invention according to claim 12, with the help of stretching the thermoplastic sheet by the plug, the thickness of the thermoplastic sheet laminated and adhered to the bottom can be increased even when the container base is deep, and the container can be made high quality. .
In the invention concerning Claim 13, the area of the thermoplastic sheet used for shaping | molding can be fixed, the thickness of the thermoplastic sheet laminated | stacked on a container base material can be made constant, and a container can be made high quality.
In the invention according to the fourteenth aspect, with the aid of stretching of the thermoplastic sheet by blowing, the thickness of the thermoplastic sheet to be laminated and adhered to the bottom can be increased even when the container base is deep, and the container can be made high quality. .

Hereinafter, embodiments of the present invention will be described in the following order.
(1) Description of the starch container manufacturing system:
(2) Description of container forming device:
(3) Modification:

(1) Description of the starch container manufacturing system:
FIG. 1 is a diagram showing an outline of a starch container manufacturing system to which the present invention is applied, FIG. 2 is a sectional view showing a main part of the configuration of a molding mechanism 40 in a vertical section, and FIG. It is sectional drawing which shows a mode that a raw material is shape | molded by a vertical cross section. FIG. 4 is a cross-sectional view showing, in a vertical cross section, a state in which the upper and lower tables are brought close to each other and scrap is cut to form a container base material. FIG. 5 is a perspective view showing the container base V1 and the container V20 before end surface processing, and FIG. 6 is a vertical sectional view as seen from the position A1-A1 in FIG.
The starchy container manufacturing system 1000 includes the respective parts 100, 200, 300, 900, and 990, and the control panel 900 controls the entire system and forms a container from a starchy material. In the material forming apparatuses 10 and 20, at least water and a material exhibiting binding properties are mixed by heating in the mixer 10, and a soft and sticky material after mixing is molded by the molding machine 20 to form the material M1. Form. The material conveying device 30 conveys the formed material M1 to the forming mechanism 40, and the forming mechanism 40 shapes the material M1 into a container shape. In the take-out mechanism 50, the container base material V1 is taken out and delivered to the container base material transport apparatus 200. In the container base material transport apparatus 200, the container base material feeder (container base material supply mechanism) 220 transports the container base material and forms the container base material when there is a lower table at a predetermined container base material supply position L11. Is supplied to the mold, and the heater (container base material preheating mechanism) 260 raises the temperature of the container base material V1 conveyed by the container base material supply device 220. The molding and trimming machine 300 is a device that performs differential pressure molding and trimming in the same mold. When the lower table is at a predetermined molding position L12, the molding and trimming machine 300 sucks air from the accommodation surface in which the container base material is accommodated. At the same time, the thermoplastic sheet is laminated and adhered to the container base, and at the same time, the surrounding thermoplastic sheet is cut to form a laminated container, which is delivered to the container end surface processing machine 990. The container end surface processing machine 990 is thermoplastic on the sheet non-lamination surface opposite to the sheet lamination surface at the end of the container base of the laminate container in which the thermoplastic sheet is cut at an outer position from the end of the container base. A sheet is rolled up and laminated. The control panel 900 includes a computer and an operation unit for setting the operation condition of the system 1000 and monitoring the operation state. The control panel 900 can operate the system by performing various operations.

Starch and starchy materials can be used as the material that exhibits binding properties by heating. Such materials include tapioca starch, rice starch, sweet potato starch, corn starch, potato starch, pearl millet starch, sago starch, wheat starch, wheat flour, rice flour, etc., which may be flour, starch or modified starch, oxidized starch Processed starches such as phosphate starch and dextrin may also be used.
In the case where the starchy material M1 is formed only from powdered starch (dried product) and water, for example, if 40 to 70% by weight of starch and 30 to 60% by weight of water are blended, it flows to the extent that it has shape retention. It is possible to form a soft material M1 having low property and no collapse. In general, when the raw material M1 is formed by mixing powdered starch or starchy material and water, the flowability of the raw material M1 is reduced if the mixing ratio of water is decreased, and the raw material is increased if the mixing ratio of water is increased. The collapse of M1 does not occur. Accordingly, the material M1 having good shape retention can be formed by adjusting the blending ratio so that the fluidity is low enough to have shape retention and the collapse is not caused. Since the formed soft material M1 contains moisture, it has adhesiveness.

In addition to the materials described above, a third material such as a plasticizer, a reinforcing filler, a binder, and a filler may be added.
In addition, as a material used for forming the starch raw material M1, the material described in Unexamined-Japanese-Patent No. 2001-151280, Unexamined-Japanese-Patent No. 2002-79585, Unexamined-Japanese-Patent No. 2005-41129, etc. is used. it can.

The container base material forming apparatus (container base material forming mechanism) 100 includes the respective parts 10, 20, 30, 40, 50, and forms a breathable container base material V1 in a foamed state in which the material is foamed and formed into a container shape. Form.
Various mixers, such as a well-known mixer, can be used for the mixer 10, for example, a material is mixed on the temperature conditions of 40-100 degreeC, and the mixed raw material is supplied to the molding machine 20. FIG. The molding machine 20 can use various molding machines such as a known extrusion molding machine and press molding machine. For example, the mixed material is molded into a rectangular parallelepiped material M1 at a temperature of 20 to 80 ° C. The material conveying device 30 uses a needle that can move forward and backward, and a needle holding member that holds the needle so that the needle can move forward and backward, and reciprocates between a predetermined pre-conveyance position and a predetermined post-conveyance position. When the holding member is in the pre-conveyance position, the needle is advanced to hold the material by piercing the material, and when the needle holding member moves to the post-conveyance position, the needle is retracted to remove the material from the lower mold of the molding mechanism 40. Let it fall inside.

The forming mechanism 40 includes portions 41, 42, 44a to c, 45, 46, and 47a to c, and forms the material M1 while the forming upper table 45 is moved up and down.
The lower table 41 is made of, for example, metal, and has a mold accommodation hole formed on the upper surface in accordance with a position where the lower mold 42 is attached, and is movable in the horizontal direction. The lower mold 42 is attached to the accommodation hole on the upper surface of the lower table. The lower table 41 is configured to block water vapor generated from the raw material when the starchy material M1 is molded from the upper surface.
The lower mold 42 is a metal mold for foam molding, and is formed in a shape that matches the outer surface of the container to be manufactured. In the present embodiment, the lower mold 42 is a female mold that is recessed downward, and the upper mold 46 that is opposed to the lower mold above the lower mold 42 is a male mold that is expanded downward. . Therefore, the starch material M1 conveyed by the material conveying device 30 falls from the opening 42a of the lower mold 42 to the inner bottom portion 42b in the lower mold 42. Around the opening 42a of the lower mold, a plurality of escape passages 43 are formed to connect the inner space and the outer space formed when the upper and lower molds 46, 42 are closed to close the mold. A part of the material is allowed to escape from the inner space to the outside from the periphery of the material M1 which is expanded and molded.
The lower die 42 has a lower heater 44a attached to the upper portion of the outer surface of the lower die 42, a temperature sensor 44b attached to the bottom surface of the lower die 42, and a feedback control mechanism in which the heater 44a and the sensor 44b are connected. The lower mold heating mechanism including 44c is attached, and the temperature of the lower mold 42 is feedback-controlled so as to reach the target first set temperature.

The forming upper table 45 is made of metal, for example, and is movable in the vertical direction above the forming position. On the lower surface 45a of the upper table 45, an upper mold 46 is attached downward at a position facing the lower mold 42 at a predetermined molding position, and a steam suction port 45a is formed. The steam suction port 45a is a through-hole that vertically penetrates the upper surface and the lower surface of the upper table 45 in order to suck water vapor generated from the starchy material M1, and can discharge water vapor upward.
The upper mold 46 is a metal mold for foam molding, and is formed in a shape that matches the inner surface of the container to be manufactured. The upper mold 46 is attached to the upper table 45, can be moved up and down, and is provided at a position facing the lower mold 42. The same mold 46 includes a male upper mold body 46a that is convex downward, and a peripheral member 46b that is disposed around the upper mold main body. The peripheral member 46b includes an annular member 46c that is supported so as to move up and down around the upper mold body 46a, and a spring 46d that is attached between the upper surface of the annular member 46c and the lower surface of the upper table. When the upper mold 46 moves downward and the material is molded with the lower mold 42, the end of the molded material M2 is sandwiched between the lower mold 42 and the upper mold 46 moves upward. When it does, it moves below relatively with respect to the upper mold | type main-body part 46a, and separates the said shape | molded raw material M2 from the upper mold | type main-body part 46a.
The upper die 46 includes an upper heater 47a attached to the upper portion of the upper die 46, a temperature sensor 47b attached to the upper portion of the upper die 46 at a position different from the upper heater, a heater 47a and a sensor 47b. An upper mold heating mechanism including a connected feedback control mechanism 47c is attached, and the temperature of the upper mold 46 is feedback-controlled so as to reach a target second set temperature.
In addition, what is necessary is just to let the 1st preset temperature at the time of forming a starch container and 2nd preset temperature be about 150-250 degreeC, for example.

  The upper table driving mechanism that reciprocates the upper table 45 in the vertical direction is made of, for example, metal, has a chain, and is fixed to the upper table so that the longitudinal direction can be moved in the vertical direction. And a servo motor that drives the upward moving member in the vertical direction, and vertically moves the upper table 45 between a predetermined separation position (position shown in FIG. 2) and a predetermined proximity position (position shown in FIG. 3). Drive back and forth in the direction.

  When the material M1 is accommodated in the lower mold 42 and the lower table 41 moves to the molding position, first, the upper table drive mechanism lowers the upper table 45 to the close position. At this time, the lower surface of the annular member 46c comes into contact with the upper surface of the lower mold 42, and the spring is compressed in the vertical direction. Since the upper and lower molds 46 and 42 are at a high temperature, the starch material M1 before molding supplied into the lower mold 42 is heated while being pressurized between the upper and lower molds 46 and 42, and the material M1 of the material M1 is heated. Water vapor derived from moisture is generated, and a part of the escape passage 43 escapes to the outside while expanding, and the starch component changes into a paste and solidifies in a foamed state and is molded into a container shape. Thereafter, the upper table driving mechanism raises the upper table 45 to the separation position. At this time, a downward pressing force is applied to the annular member 46c from the compressed spring 46d, and the annular member 46c moves downward relative to the upper mold main body 46a, so that the material M2 after molding is formed. The end portion is pulled downward from the upper mold main body 46a. At this stage, the scrap M3 is attached around the material M2 after molding.

The take-out mechanism 50 includes 51, 51a to c, 52, 53, and 54. When the lower table 41 moves horizontally to a predetermined take-out position, the take-out mechanism 50 comes out from the periphery of the molded material M2 on the lower mold 42. The scrap M3 is cut to form a container base V1, and the container base V1 is taken out from the lower mold 42.
The take-out upper table 51 is made of, for example, metal, and a combination of a cutting blade 52 and a suction pad 53 is attached downward at a position facing the lower mold 42 at the take-out position. The cutting blade 52 is made of metal and has a substantially cylindrical shape with the central axis directed in the vertical direction. The cutting blade 52 is formed in an annular shape that is slightly larger than the opening 42a of the lower mold, and has a sharp shape on the lower side. The cutting edge 52 can be moved up and down above the take-out position, and is provided at a position opposite to the lower mold 42 when the lower table 41 is in the take-out position. The cutting blade 52 is shaped to match the end of the container base V1 while enclosing the container base V1 formed on the lower mold 42 in a horizontal plane.
Each suction pad 53 is surrounded by the cutting blade 52 in the horizontal direction, and can suck the upper surface of the bottom portion of the material M2 formed on the lower mold. The suction pad 53 extends downward from the lower surface of the air cylinder 54 and can move up and down relatively with respect to the cutting edge 52. The suction pad 53 is connected to a vacuum pump. When vacuum pressure is applied from the vacuum pump, the molded material M2 or the container base V1 is sucked at the opening at the lower end and the vacuum pressure from the vacuum pump is applied. Is stopped, the adsorbed container base V1 is opened and dropped.
The cutting blade 52 and the air cylinder 54 described above are attached and fixed to support members 51a to 51c attached to the lower surface of the upper table for extraction.

A lifting mechanism is attached to the upper surface of the upper table 51. The lifting mechanism is made of, for example, metal, has a chain, protrudes upward from the center of the upper surface of the upper table 51, and can move in the vertical direction, and a servo that drives the upward protruding member in the vertical direction. A motor, and reciprocally drives the upper table 51 in the vertical direction. Further, a horizontal movement mechanism is attached to the lifting mechanism. This horizontal movement mechanism reciprocates the upper table 51 in the horizontal direction.
When the lower table 41 moves to the take-out position, the upper table 51 is first lowered, and the opening of the suction pad is brought into contact with the upper surface of the bottom of the material M2 after molding as shown in FIG. Next, the upper surface of the bottom of the material M2 is adsorbed to the adsorption pad 53. Then, the suction pad 53 is moved upward. Then, the foamed starchy scrap M3 that has come out from the periphery of the material M2 comes into contact with the cutting edge at the lower end of the cutting blade 52 and is cut to form a foamed starchy container base material V1. Thereafter, the upper table 51 is raised while the container base material V1 is adsorbed to the suction pad 53, horizontally moved to a position above the placement position of the container base material supply machine 220, and the upper table 51 is lowered and sucked. The container substrate V1 is dropped from the pad 53. Then, the upper table 51 is lifted from the stacking position and horizontally moved to an upper position on the take-out position.
As described above, the scrap M3 is cut from the molded material M2 to form the container base material V1 before polishing, and is taken out while being adsorbed by the suction pad.

The container base material V1 conveyed by the container base material supply machine 220 has a concave portion V13 having an opening V13c formed in the upper portion thereof, and substantially the same plane formed around the concave portion (substantially horizontal in an upright state). The flange part V14 is provided and it is formed in a bowl shape with rounded corners. The concave portion V13 of the container includes a bottom portion V13a that is substantially horizontal in an upright state, and a side wall portion V13b that extends around the bottom portion while being slightly inclined outward from the lower portion toward the upper portion. Thereby, another container base material V1 can be inserted from above the concave portion V13 of the container, and the container base material V1 can be stacked. From the upper end of the side wall part V13b, the flange part V14 extends toward the periphery so as to be substantially horizontal to the outside. The flange portion V14 is at a position where the outer periphery is on the circumference.
The recess-side surface (upper surface in the upright state) of the container substrate V1 is a sheet lamination surface V11 on which the thermoplastic sheet V21 is laminated. The illustrated sheet lamination surface V11 is an upper surface of the bottom portion V13a, an inner surface of the side wall portion V13b, and an upper surface of the flange portion V14. On the other hand, the surface (lower surface in the upright state) opposite to the sheet lamination surface V11 in the container substrate V1 is a sheet non-laminate surface V12 on which the thermoplastic sheet is not laminated except for the end portion V15. The illustrated sheet non-stacked surface V12 is a lower surface of the bottom portion V13a and an outer surface of the side wall portion V13b.
And when the thermoplastic sheet V21 is laminated | stacked on the sheet | seat lamination surface V11 of a container base material, and the said thermoplastic sheet is cut | disconnected by the outer side position from the edge part V15 of the container base material V1, it will be set as the container V20 before an end surface process. The Thereafter, when the surrounding thermoplastic sheet V22 in the container V20 is wound around the sheet non-laminate surface V12 and laminated and adhered, the end surface V16 of the container base material V1 is covered with the thermoplastic sheet V22 and protected.
In the present embodiment, the thermoplastic sheet and the container base material are formed by a part of the thermoplastic sheet functioning as an adhesive regardless of whether the thermoplastic sheet heat-softened is a single layer or a multilayer. The state in which the two are connected by the force acting on the interface and laminated is referred to as the “laminated adhesion” state.

  The container base material that can be used in the present invention may be a container base material formed of a material that allows air to pass therethrough, and a breathable biodegradable material such as the starch container base material. In addition, a paper container base formed by pulp molding, a container base made of annual pulp such as straw or kenaf that does not fall under the paper classification under the recycling law, and a porous ceramic material A porous ceramic container base, a porous metal container base made of a porous metal, and the like can be used. Moreover, since it is sufficient that air can be permeated at least in part, only the bottom portion is formed of a breathable material, and the side wall portion and the flange portion are formed of a non-breathable material such as a non-foamed synthetic resin sheet, Only the side wall portion may be formed of a breathable material, and the bottom portion and the flange portion may be formed of a non-breathable material.

Further, the thermoplastic sheet that can be laminated and bonded to the molded container base material may be a film or sheet made of a thermoplastic material. Various materials such as polyethylene resin, polypropylene resin, polystyrene resin, polyvinyl chloride resin, ABS resin, polyethylene terephthalate resin, and polycarbonate resin can be used as the material. In particular, polypropylene resin is a suitable synthetic resin because it is relatively inexpensive and has heat resistance during use and good suitability for differential pressure molding. In addition, the thickness of the sheet when the thermoplastic sheet is laminated and bonded to the container base material by differential pressure molding can be various thicknesses such as about 0.25 to 1 mm, about 1 to 2 mm, and the like. Even a thermoplastic film of about 25 mm or less, particularly an ultrathin thermoplastic film of about 0.05 mm, can be laminated and adhered.
In addition, in order to improve the adhesiveness of the thermoplastic sheet to the container base material, an adhesive layer may be bonded to the adhesive surface of the thermoplastic sheet. For example, an ethylene-vinyl acetate copolymer resin (EVA), an ethylene-acrylic acid copolymer resin (EAA), an ethylene-methacrylic acid copolymer resin (EMAA), or a linear low density polyethylene resin (EVA) as an adhesive layer on a polypropylene base sheet. A thermoplastic sheet or the like bonded with LLDPE) can be used. The thickness of the thermoplastic sheet on which the adhesive layer is formed can be, for example, about 20-100 μm for the base sheet portion and about 20-40 μm for the adhesive layer portion. In addition, the temperature of the softening point of the adhesive layer is preferably lower than the temperature of the softening point of the base sheet, and can be, for example, about 80 to 135 ° C.
In order to provide gas barrier properties, a gas barrier polymer represented by polyvinylidene chloride (PVDC), ethylene vinyl acetate copolymer (EVA), and ethylene / vinyl alcohol copolymer (EVOH) is used as a gas barrier layer. An inserted thermoplastic sheet may be used.

(2) Description of container forming device:
FIG. 7 is a side view showing the configuration of the container base material transport apparatus 200, and FIG. 8 is a side view showing the configurations of the lower table 320 and the lower table drive mechanism 340. FIG. 9 is a perspective view showing the appearance of the molding and trimming machine 300, and FIGS. 10 to 14 are sectional views showing a vertical section with respect to the transport direction of the thermoplastic sheet S1 in the molding and trimming machine 300. FIG.
The lower table 320 is made of metal, for example, and has a concave mold accommodating hole 322 formed on the upper surface 320a. The molding die 520 is attached by being inserted into the die accommodation hole 322 with the accommodation portion 530 facing upward, and a plurality of molding 520 are arranged on the upper surface 320 a of the lower table 320. The lower table 320 is movable in the horizontal direction connecting a predetermined container base material supply position L11 to which the container base material V1 is supplied and a predetermined molding position L12, and is a predetermined lower side at the molding position L12. It is possible to move in the vertical direction between the separation position L13 and a predetermined proximity position L14 on the upper side, and the accommodating portion 530 can be moved toward and away from the holding member 560. Therefore, it is not necessary to move the holding member, the structure for supporting the holding member can be simplified, and the container base material supply mechanism can be facilitated.

  The container base material feeder (container base material supply mechanism) 220 includes transporters 230 and 240, transports the container base material V1, and supplies the container base material V1 to the forming mold accommodating portion 530 at the container base material supply position L11. The conveyor 230 includes a metal chain 232 that circulates in a predetermined rotation direction, a servo motor 234 that intermittently drives the chain, and a plurality of metal caterpillar members 236 that are fixed on the chain 232 with screws. The container base material is intermittently moved in the horizontal direction connecting the pre-heating position L1 and the predetermined pre-heating position L2. The servo motor 234 moves or stops the chain 232 at a predetermined timing according to the control of the control panel 900. Each caterpillar member 236 is formed in a flat plate shape, and a circular opening is formed in the center portion to accommodate the container base material V1. Each caterpillar member 236 that circulates on the chain 232 moves horizontally in the forward direction including from the pre-heating position L1 where the container base material is accommodated to the post-heating position L2 when it is on the upper side, and moves backward when it is on the lower side. Move horizontally.

The heater (container base material preheating mechanism) 260 includes a box portion 261 that forms a heating box that covers the caterpillar member 236 on the upper side between the positions L1 and L2, and a tubular hot air passage 262 that guides hot air to the box portion. , A blower 263 that generates and sends out wind, and a heater 264 that heats the air flow generated by the blower, and heats the container base V1 that is housed and transported in the caterpillar member 236 to house the container 530. The temperature of the container base V1 is raised before being accommodated in the container. Thus, since the temperature of a container base material is raised previously, the adhesiveness of the thermoplastic sheet to a container base material can be improved, and the cycle time which forms a laminate container can be shortened.
The hot air supplied to the box portion may be exhausted to the outside air, or may be reused in a circulating manner.

The suction conveyance device 240 has a suction member 242 capable of sucking the upper surface of the bottom V13a of the container base at the lower end, and reciprocates the suction member in the horizontal direction between the preheated position L2 and the container base supply position L11. A horizontal drive mechanism 244 and an elevating mechanism 246 that reciprocates the horizontal drive mechanism in the vertical direction are provided, and the preheated container base material V1 at the preheated position L2 is conveyed to the container base material supply position L11 to be accommodated 530. To supply.
The adsorbing member 242 is connected to an air pump, and adsorbs the container base V1 when a vacuum pressure is applied from the air pump, and opens the adsorbed container base V1 when the vacuum pressure from the air pump stops. To drop. The horizontal drive mechanism 244 includes, for example, a rail member that has the suction member 242 attached so as to be movable in the horizontal direction, and a servo motor that drives the suction member 242 along the rail member in the horizontal direction in accordance with the control of the control panel 900. It can consist of The elevating mechanism 246 includes, for example, a rail member attached with a horizontal drive mechanism 244 movably in the vertical direction, and a servo motor that drives the horizontal drive mechanism 244 in the vertical direction along the rail member in accordance with the control of the control panel 900. It can consist of.

The lower table drive mechanism 340 includes a chain conveyor 341 in which the lower surface of the lower table 320 is fixed to the upper surface 340a with bolts, a servo motor 342 that drives the chain conveyor, and position detection sensors 343 and 344 that detect the horizontal position of the lower table 320. A lower table elevating mechanism 345 for elevating and lowering the lower table 320 at the molding position L12. The lower table 320 is reciprocated in the vertical direction at the molding position L12 while being reciprocated in the horizontal direction between the L11 and L12. To do. For example, the groove 324 can be formed in the horizontal direction on both side surfaces along the movable direction of the lower table 320, and the lower table 320 can be moved up and down by inserting the insertion member 346 of the lower table lifting mechanism 345 into the groove 324. Specifically, when the lower table is at the container base material supply position L11, the servo motor 342 rotates the conveyor 341 to the forward side and drives the lower table to the forward side at a predetermined timing in accordance with the control of the control panel 900. When the lower table is moved horizontally by a predetermined amount and stopped at the molding position L12, and the lower table is at the separation position L13 of the molding position L12, the lower table is raised by a predetermined amount according to the control of the control panel 900, and the proximity position L14 When the lower table is in the proximity position L14, the lower table is lowered by a predetermined amount at a predetermined timing in accordance with the control of the control panel 900 and stopped at the separation position L13, and the lower table is separated from the molding position L12. The container base is moved horizontally by a predetermined amount to the retreat side at a predetermined timing in accordance with the control of the control panel 900 when in L13. It is stopped at a sheet position L11. The sensors 343 and 344 may detect whether or not the lower table has moved to a predetermined position, and may be stopped when it is detected that the lower table has moved to the predetermined position.
As the drive mechanism 340, an air cylinder or a hydraulic cylinder may be used instead of the chain conveyor, and the lower table may be driven by air pressure or hydraulic pressure.

9 is generally disposed above a roll sheet unwinding machine 432, a scrap winder 434, a sheet conveying mechanism 420 that holds and conveys sheets S1 and S2, and a thermoplastic sheet S1. A heater 440 having a heater 442, a forming mechanism 600 and a trimming mechanism 700 disposed at the same place, and a container unloader 380 are provided. The sheet conveying mechanism 420 conveys the thermoplastic sheet S1 heated and softened by holding both side edges in the width direction of the thermoplastic sheet S1 to be conveyed at a predetermined sheet holding start position L21 to the vicinity of the molding die accommodating portion 530. At the same time, both side edges in the width direction of the scrap sheet S2 generated from the thermoplastic sheet are held as they are, and the scrap sheet is released at a predetermined sheet release position L22.
A necessary amount of the thermoplastic sheet S1 wound in a roll shape is sequentially unwound from the roll sheet unwinding machine 432, and both side edges in the width direction are held by the sheet conveying mechanism 420 and conveyed in the horizontal direction, and the heater 442 Is heated and softened by heat, molded, laminated and adhered to the container base V1, and trimmed around the container base V1 to obtain a scrap sheet S2. The scrap sheet S2 is conveyed in the horizontal direction with both side edges in the width direction being held by the sheet conveying mechanism 420, released from the sheet conveying mechanism at the sheet release position L22, and then pulled by the scrap winder 434. While being rolled up, it is collected. The container V20 before the end surface treatment formed by trimming the thermoplastic sheet S1 on the container base material V1 is taken out by the container unloader 380 and supplied to the container end surface processor 990.

As shown in FIGS. 15 and 16, the sheet conveying mechanism 420 is roughly a spike holding device including a chain rail 421, an outer frame 422, a spike receiving member 423, a spike conveying rail, an endless chain 425, a sprocket, and a servo motor. Has been. The chain rail 421 is formed of a long member extending in the conveyance direction DS1 of the sheets S1 and S2, and is fixedly attached to the outer frame 422. In the chain rail 421, a rail surface into which the link piece 425a can be inserted is arranged in the sheet conveying direction DS1, and an endless chain 425 connected to the rail is inserted, and the endless chain 425 circulates along the sheet conveying direction DS1. Let
The endless chain 425 is connected to a plurality of link pieces 425a by pinning, and spans between a sprocket at the sheet holding start position L21 and a sprocket at the sheet release position L22. Therefore, the endless chain 425 conveys the sheets S1 and S2 while performing a substantially linear motion between the rotating sprockets at both positions L21 and L22, and circulates as a whole.
A spike member (sheet holding member) 425b is fixed to one surface of each link piece 425a. The spike member 425b is formed with a protrusion from the substantially disk-shaped member toward the radially outer side, and the protrusion is disposed so as to pierce the sheets S1 and S2 upward from the lower side.
The servo motor connected to the rotation shaft of the sprocket through the gear structure rotates or stops the endless chain 425 in accordance with the control of the control panel 900.

The spike receiving member 423 is disposed at a position where the protrusion of the spike member 425b that goes around with the endless chain 425 contacts. A polyurethane rubber 423a is fitted in the contact portion. The sheet S1 is loaded so as to be interposed between the protrusion of the spike member 425b and the spike receiving member 423, and is pierced and held by the spike member 425b.
With the above configuration, the sheet conveying mechanism 420 holds both side edges in the width direction of the thermoplastic sheet S1 to be conveyed while being pierced by the spike member 425b at the sheet holding start position L21, and holds the thermoplastic sheet S1 in the accommodating portion 530. In addition, the both side edges in the width direction of the scrap sheet S2 generated from the thermoplastic sheet S1 are held as they are by the spike member 425b, and the scrap sheet S2 is released at the sheet release position L22.
As the sheet conveying mechanism, a spike holding device described in JP-A No. 2002-14596 and JP-A No. 2002-103435 can be used.

  The sheet conveying mechanism 420 is provided with a holding unit cooling mechanism 460 that cools a portion held by the spike member 425b in the scrap sheet S2 being conveyed. The holding part cooling mechanism 460 of the present embodiment is an air ejection mechanism 470 that blows air at a temperature lower than that of the scrap sheet S2 only to the portion held by the spike member 425b in the scrap sheet S2 being conveyed. . As shown in FIG. 15, the air ejection mechanism 470 is provided at both side edges in the width direction of the scrap sheet S2 so as to eject air from below to above, and only the both edges are cooled. At least the sheet conveying mechanism 420 and the holding unit cooling mechanism 460 constitute the sheet conveying apparatus of the present invention.

  Both side edges held by the spike member 425b in the scrap sheet S2 are sprayed with relatively low temperature air by the air jet mechanism 470, and the plasticity is lowered, so that the spike member 425b is smoothly separated from the scrap sheet S2. Therefore, the scrap sheet S2 can be easily collected, and online production of the laminate container can be accelerated. Further, since the inner side in the width direction of the scrap sheet S2 is not cooled by the holding unit cooling mechanism 460, the heat-softened thermoplastic sheet S1 disposed in the vicinity of the storage unit 530 is not cooled by the holding unit cooling mechanism 460, and heat is generated. The plastic sheet is laminated and adhered to the container base with high accuracy. Further, since air is blown only on both side edges in the width direction of the scrap sheet S2, the heat-softened thermoplastic sheet S1 disposed in the vicinity of the accommodating portion 530 hangs under the influence of air by the air blowing mechanism. Such a situation does not occur, and the thermoplastic sheet is laminated and adhered to the container base material with high accuracy.

Each molding die 520 is a metal female die, and has an opening 530a that is opposed to each holding member 560, and accommodates the container base material V1 in the accommodating surface 532 capable of sucking air. A part 530 is provided. The accommodation surface 532 is formed with a suction hole 534 capable of sucking air downward. The suction hole 534 is connected to a vacuum pump (not shown). When a closed space is formed in the female accommodating portion 530 and a vacuum pressure is applied to the suction hole 534 by the vacuum pump, Air can be aspirated. Each mold 520 is provided with a heater 524 and a temperature sensor (not shown), and is heated to a target temperature by feedback control. Thereby, the mold temperature control function for the purpose of keeping the container base material V1 warmed by the heater 260 is realized for each mold.
Around the opening 530a of the molding die 520, a metal receiving plate 522 is attached to the surface in contact with the heat-softened thermoplastic sheet disposed in the opening 530a. The receiving plate 522 of the present embodiment is made of, for example, stainless steel, and is positioned to face the annular Thomson blade (cutting blade) 720. The heat-softened thermoplastic sheet S1 disposed on the upper surface is pressed by the Thomson blade 720. It can be cut by. Note that the Thomson blade is not spilled by a stopper mechanism (not shown). The said stopper mechanism can be comprised by the stopper member described in Unexamined-Japanese-Patent No. 2004-9698, for example.
The accommodating surface 532 is provided with a cushioning material 540 that reduces the impact force applied to the container base material V1. As the buffer material 540, a cushion material such as a fuzzy cloth such as flannel or sponge, a foamed synthetic resin such as foamed polystyrene, a rubber having elasticity, or the like can be used. The cushioning material 540 may be a sheet or the like and may be affixed to a part of the accommodation surface 532, or may be spread over the entire accommodation surface 532 as long as it is breathable.

The upper table 580 is made of metal, for example, and is fixed so as not to move. However, the lower table 320 is moved back and forth between the positions L13 and L14 in the up-and-down direction, so that the upper table 580 approaches and moves downward. It is provided so that it can be separated. In addition, an air supply hole 581 is formed in the lower surface of the upper table 580 above each holding member 560. Each air supply hole 581 is connected to an air pump (not shown).
A plurality of metal holding members (locators) 560 having an air cylinder structure are attached to the lower side of the upper table 580. Therefore, the holding member is provided so as to be close to and away from the housing portion 530 of the molding die. Hard resin or the like may be used as the material of the holding member. Each holding member 560 is formed in a shape that covers the accommodating portion 530 when approaching the molding die 520, and is capable of fine movement within a range of about 1 to 5 mm, for example, and is opposed to each opening 530a of the molding die. Thus, it can be pressed toward the molding die 520. Each holding member 560 presses and closely contacts the heat-softened thermoplastic sheet S1 disposed in the opening 530a in the vicinity of the housing portion 530 around the housing portion 530 in the molding die 520. It can be held.
Inside each holding member 560, an air passage 811 penetrating the lower surface and the side surface is formed.
Each holding member 560 can be moved up and down only within a predetermined range by a stopper mechanism (not shown), and slides downward relative to the upper table when pressurized air is supplied from the air supply hole 581. When the vacuum pressure is supplied from the air supply hole 581, it slides upward relative to the upper table. Of course, as a mechanism for driving the holding member, a mechanism using a hydraulic cylinder, a servo motor, or the like may be used.
A fluororesin layer may be formed on the lower surface of the holding member. Then, it can prevent that the thermoplastic sheet heat-softened adheres to a holding member.

When the container base V1 is coated with the thermoplastic sheet S1, compressed air is supplied from the air supply hole 581 by the air pump to move the holding member 560 relatively downward, and the container base V1 is accommodated in the housing portion 530. First, the lower table 320 is moved up to the proximity position L14 by the lower table driving mechanism 340, the accommodating portion 530 and the holding member 560 are brought close to each other, and the thermoplastic sheet heated and softened by the holding member 560 is placed. S1 is pressed and held around the housing portion 530. Then, air is sucked from the accommodation surface 532 through the container base V1 by the vacuum pump and the heat-softened thermoplastic sheet S1 pressed and held by the holding member 560 is laminated and adhered to the sheet lamination surface V11 of the container base. Thereafter, the supply of compressed air from the air supply hole 581 is stopped, the holding member 560 is moved relatively upward, the thermoplastic sheet S1 around the container substrate V1 is cut with the Thomson blade 720, and the container V20 Form.
The above-described processing is performed at a predetermined timing according to the control of the control panel 900. The forming mechanism 600 that performs the processing includes the control panel 900, the air pump, and the vacuum pump.

  Here, the foamed container base material V <b> 1 contacts the buffer material 540 and is stored in the storage portion 530. Although the breathable container base material in the foamed state has the property of being easily cracked, the container base material that is easily cracked in this way is difficult to break, and the production yield of the laminate container can be improved.

Around each holding member 560, an annular Thomson blade 720 that can be pressed toward the receiving plate 522 is disposed. As shown in the exploded perspective view of the main part in FIG. 17, the annular Thomson blade 720 has the cutting edge facing downward and the outer surface 720 a held by the inner surface 730 a of the metal holding frame 730, and the upper table 580. Is provided on the lower side. A groove 324 is formed on the outer periphery of the holding member 560 on the lower surface of the upper table 580, and the holding frame 730 holding the Thomson blade 720 is fixed by inserting the upper portion into the groove 324.
When the holding member 560 is in the lowered position with respect to the upper table, the lower side of the Thomson blade 720 is above the lower surface of the holding member 560, and when the holding member 560 is in the raised position, the lower side of the Thomson blade 720 is the holding member 560. It is below the lower surface of. Then, when the holding member 560 moves from the lowered position to the raised position with reference to the upper table, the Thomson blade 720 moves down together with the upper table, and the thermoplastic sheet S1 pressed and held by the holding member 560 is pressed and cut.
The above-described processing is performed at a predetermined timing according to the control of the control panel 900. The trimming mechanism 700 that performs the processing includes the control panel 900 and the air pump.

  By the way, since the holding member 560 is shaped to cover the housing portion 530 when approaching the housing portion 530, and the Thomson blade 720 is disposed around the retaining member 560 when approaching the housing portion 530, the thermoplastic sheet S1 and the holding member 560 A space SP1 is partitioned between the two. When laminating and bonding a thin thermoplastic sheet to a breathable container base material by vacuum pressure forming, if pressure air larger than atmospheric pressure is supplied, the thickness of the laminated thermoplastic sheet will vary and pinholes will occur in the thermoplastic sheet However, even if the thickness of the thermoplastic sheet is constant, pinholes may be generated due to high pressure. Therefore, it is better not to supply pressurized air larger than atmospheric pressure, so that the container formed is of higher quality. . Therefore, the negative pressure releasing means 800 is provided, and the negative pressure generated in the space SP1 between the thermoplastic sheet and the holding member when air is sucked from the accommodation surface 532 is released below the atmospheric pressure. The negative pressure release means 800 of the present embodiment includes an air passage 810, a slightly pressurized air supply mechanism 820, and an air passage opening / closing mechanism 830.

The air passage 810 of the present embodiment includes the air passage 811 and an air passage 812 that passes through the upper table 580 so as to allow ventilation. Both air passages 811 and 812 communicate with each other so as to allow ventilation. The air passage 812 is connected to the air passage opening / closing mechanism 830. The air passage opening / closing mechanism 830 is, for example, a solenoid valve type switching valve, and switches whether the air passage 810 is connected to the outside air or to the slightly pressurized air supply mechanism 820. As a result, the air passage opening / closing mechanism 820 closes the air passage 810 when air at atmospheric pressure or less is supplied by the micro air supply mechanism 820, while the air passage is not supplied by the micro air supply mechanism 820. 810 is opened. When the air passage 810 is connected to the outside air, the air passage connects the space SP1 between the holding member and the thermoplastic sheet and the outside air when the holding member 560 and the accommodating portion 530 come close to each other. It becomes.
The air passage opening / closing mechanism may be a mechanism that adjusts with a manual valve.
The micro-pressure air supply mechanism 820 has an air pump and supplies micro-pressure air while controlling so as to reach a target pressure, and when the housing portion 530 and the holding member 560 come close to each other, the holding member, the thermoplastic sheet, The air below atmospheric pressure is supplied to the space SP1. Here, the atmospheric pressure is about 0.1 MPa, and, for example, 0.02 to 0.09 MPa (0.2 to 0.9 kg / cm ² ) of micro air is supplied to the space SP1.

Hereinafter, the operation of the container forming apparatus will be described with reference to the timing chart shown in FIG. The air passage 810 is connected to the outside air by an air passage opening / closing mechanism 830.
When the breathable container base material V1 formed by the container base material forming apparatus 100 is supplied to the caterpillar member 236 at the pre-heating position L1, it is heated by the heater 260 while being conveyed by the conveyor 230 to the post-heating position L2. When the lower table 320 is at the container base material supply position L11, it is supplied to the forming mold accommodating portion 530 by the suction conveyance device 240. At this stage, it is assumed that the sheet conveying mechanism 420 stops conveying the sheet, the holding member 560 is in the raised position, and no vacuum pressure is applied to the suction hole 534 of the accommodation surface. In addition, in the case of using the micro air at the time of molding the thermoplastic sheet, it is assumed that the micro air is not supplied from the micro air supply mechanism 820.
Next, the lower table 320 is slid in the horizontal direction from the container base material supply position L11 to the molding position L12 by the lower table drive mechanism 340 (timing t1 to t2). Then, the molding die 520 containing the container base material V1 moves horizontally to the separation position L13. Further, the thermoplastic sheet S1 is conveyed by the sheet conveying mechanism 420, and the heat-softened thermoplastic sheet S1 is disposed above the molding position L12, that is, above the accommodating portion 530 that accommodates the preheated container base material V1. (Timing t3 to t4). Then, as shown in FIG. 10, the heat-softened thermoplastic sheet S <b> 1 is disposed between the preheated container base material V <b> 1 and the holding member 560. In FIG. 18, the timings t1 to t2 and the timings t3 to t4 are in the same period, but may be different periods. In the present embodiment, at timings t1 and t3, compressed air is supplied from the air supply hole 581 by the air pump, the holding member 560 is moved in the direction of the molding die 520, and is lowered to a predetermined lowered position. Note that the holding member 560 may be lowered before the timing t6.

  Further, the lower table driving mechanism 340 moves the lower table 320 upward from the separation position L13 to the proximity position L14 (timing t5 to t6). Then, as shown in FIG. 11, the molding die 520 containing the container base V1 rises to the proximity position L14, and the holding member 560 presses the thermoplastic sheet S1 around the opening 530a of the molding die. Hold. At this time, the driving force that brings the lower table 320 close to the upper table 580 remains, but the holding member 560 comes into contact with the thermoplastic sheet S1 on the upper surface of the molding die 520, and the two tables 320 and 580 are more than this. Not close. And since the cutting edge of the Thomson blade 720 is above the lower surface of the holding member 560, the thermoplastic sheet S1 is not cut. Further, a space SP1 is generated between the thermoplastic sheet S1 and the holding member 560.

Thereafter, air is sucked from the suction hole 534 by a vacuum pump to apply a vacuum pressure to the accommodation surface 532 (timing t7). Then, in the thermoplastic sheet S1 held by the holding member 560, the air in the closed space formed by the inner surface of the recess V13 of the container base is sucked from the suction hole 534 via the container base V1. Then, it is drawn to the inner surface of the recess V13 of the container base material. Here, since the air passage 810 connects the space SP1 between the holding member and the thermoplastic sheet and the outside air, the space SP1 is opened to the outside air, and the negative pressure of the space SP1 is released below the atmospheric pressure. The Therefore, as shown in FIG. 12, the heat-softened thermoplastic sheet S1 is separated from the holding member 560, and is brought into close contact with the sheet lamination surface V11 of the container base material by differential pressure molding and laminated and adhered.
Here, since the foamed container base material V1 is in contact with the buffer material 540 and stored in the storage portion 530, it is pressed against the buffer material 540 when air is sucked from the storage surface 532 through the container base material V1. The metal mold 520 is not in direct contact. Therefore, even a foamed container base material that is easily broken can be hardly broken, and the production yield of the container can be improved.
When the air passage 810 is connected to the micro air supply mechanism 820 by an air passage opening / closing mechanism, the micro air under the atmospheric pressure is transferred from the air passage 810 to the holding member and heat by the micro air supply mechanism 820 at timing t7. It supplies to space SP1 between plastic sheets. Then, the micro pressure air below the atmospheric pressure is supplied to the space SP1, and the negative pressure in the space SP1 is released below the atmospheric pressure.

  After the differential pressure molding described above, the supply of compressed air from the air supply hole 581 to the holding member 560 by the air pump is stopped, and the lower table 320 is further brought closer to the upper table 580 by the driving force remaining in the lower table driving mechanism 340. (Timing t8). Then, as shown in FIG. 13, the holding member 560 moves to a predetermined ascending position relative to the upper table 580, and is laminated and bonded to the container base material V1 to be held by the holding member 560. Is pressed and cut by the Thomson blade 720 around the container base V1 to form a container V20 before end surface treatment. At this time, the pressing movement of the Thomson blade 720 stops at a predetermined position in contact with the upper surface of the receiving plate 522 by a stopper mechanism (not shown).

After the above trimming, the suction of air from the suction hole 534 by the vacuum pump is stopped (timing t9). Then, the container V <b> 20 formed by being sucked by the storage surface 532 is released from the suction from the storage surface 532. When the air passage 810 is connected to the micro air supply mechanism 820 by the air passage opening / closing mechanism, the micro air supply from the micro air supply mechanism 820 is stopped at timing t9.
After that, the lower table driving mechanism 340 moves the lower table 320 downward from the proximity position L14 to the separation position L13 (timing t10 to t11). Then, the lower table 320 is lowered to the position shown in FIG. 14 and the container V20 is accommodated in the accommodating portion 530, while the scrap sheet S2 trimmed from the thermoplastic sheet S1 is left as the sheet conveying mechanism 420. And placed above the container V20.
The container V20 remaining in the storage unit 530 is sucked and held by the suction unit 382 of the container take-out machine 380, is taken out from the storage unit 530, and is transported to the container end surface processing machine 990.

When the laminate container is taken out, the lower table 320 is slid in the horizontal direction from the molding position L12 to the container base material supply position L11 by the lower table driving mechanism 340 (timing t12 to t13). Then, the molding die 520 in which the housing portion 530 is empty moves horizontally to the container base material supply position L11. Thereafter, returning to timing t1, the heat-softened thermoplastic sheet S1 is held by the sheet conveying mechanism 420 and conveyed. At this time, the scrap sheet S <b> 2 is also held and transferred by the sheet conveying mechanism 420, and is wound and collected while being pulled by the scrap winder 434.
As described above, by repeating the timings t1 to t13, the process of performing the trimming by laminating and bonding the thermoplastic sheet to the container base material can be continuously performed.

As described above, according to the present invention, since the breathable container base material on which the thermoplastic sheets are laminated and bonded can be trimmed while being accommodated in the molding die, the production of the container can be speeded up. In addition, the trimming position does not vary, the appearance of the container is improved, and the process of protecting the end surface of the container with the thermoplastic sheet can be facilitated. Furthermore, although the space is partitioned between the thermoplastic sheet and the holding member, the negative pressure in the space is released without supplying compressed air with a pressure higher than atmospheric pressure, and the thermoplastic sheet is in close contact with the container base material. And then fully laminate and bond. Therefore, even if the thermoplastic sheet is thin, it is possible to mass-produce high-quality containers with good appearance while accelerating the online production of containers in which a thermoplastic sheet is laminated and bonded to a breathable container substrate. .
Further, if the air passage 810 is connected to the outside air, the negative pressure in the space formed between the thermoplastic sheet and the holding member is released, and if the air passage 810 is connected to the micro-pressure air supply mechanism 820, the space The negative pressure can be released at an appropriate pressure, and the thermoplastic sheet can be brought into close contact with the container base material and laminated and adhered more reliably. Thus, since the means for releasing the negative pressure can be switched according to the properties of the thermoplastic sheet, the properties of the container base material, etc., the present container forming apparatus is convenient.
Further, according to the present invention, the buffer base material 540 makes it difficult for the container base material to be broken, or the scrap sheet 425b is not easily separated from the spike member 425b by cooling both side edges in the width direction of the scrap sheet. In addition, various useful effects can be obtained.

(3) Modification:
Various modifications of the present invention are conceivable.
In addition to the female mold, the mold may be a male mold.
The number of combinations of the molding die, the holding member, and the cutting blade provided in the molding trimming machine may be one or plural.
When the upper and lower tables are moved closer to and away from each other, an upper table driving mechanism may be provided to drive the upper table closer to and away from the lower table by the upper table driving mechanism. You may drive so that both tables may approach and leave | separate by both of drive mechanisms.
The cutting blade may be disposed around the molding die. In this case, it is preferable that a receiving plate facing the cutting blade is provided around the holding member. Moreover, the said cutting blade may be arrange | positioned both in the circumference | surroundings of a shaping | molding die and the circumference | surroundings of a holding member. In this case, since trimming can be performed by abutting the cutting edge of the cutting blade around the molding die with the cutting edge of the cutting blade around the holding member, the receiving plate can be made unnecessary.
In the case where the micro air supply mechanism is not provided, the air passage opening / closing mechanism may be an opening / closing valve provided in an air passage penetrating through the holding member and the upper table.

The sheet transport mechanism may be a clamp-type transport mechanism that sandwiches and transports both side ends of the sheets S1 and S2 in the width direction.
The holding unit cooling mechanism may be a sheet holding member cooling mechanism that cools the sheet holding member. For example, a mechanism that cools the spike member by blowing cold air to the spike member 425b, or cools the spike member by immersing the spike member that is not in contact with the sheet in the cold water among the plurality of circulating spike members 425b. It can be a sheet holding member cooling mechanism. Even in these cases, the portion of the scrap sheet held by the sheet holding member is cooled and the plasticity is lowered, the sheet holding member is smoothly separated from the scrap sheet, and the scrap sheet can be easily collected.

Mass production of high-quality containers with good appearance while speeding up online production of laminate containers, even in container forming apparatuses that are not provided with the container base material forming apparatus 100 or the container base material transport apparatus 200 Is possible.
Even if the sheet conveying mechanism is a mechanism that holds and conveys only the scrap sheet, the scrap sheet can be smoothly separated from the sheet holding member, and the scrap sheet can be easily collected.

  As shown in FIG. 19, in the container base material forming apparatus 100, a breathable container base material V30 having a flange portion V34 that extends toward the bottom side from the recess V33 and extends outward may be formed. In this case, the shape of the lower mold 42 for molding the starch material M1 may be a shape in which the flange portion inclines toward the bottom side and extends outward in accordance with the container base material V30. Further, in the molding mechanism 600, the heat-softened thermoplastic sheet S1 is laminated and adhered to the sheet lamination surface V31 of the container substrate V30 to form a container V40 having a flange portion V44 that is inclined toward the bottom and extends outward. May be. In this case, the shape of the molding die 520 or the holding member 560 may be a shape in which the flange portion is inclined toward the bottom side and extends outward in accordance with the container V40.

  By the forming mechanism 600, the heat-softened thermoplastic sheet S1 is laminated and adhered to the sheet lamination surface V31 of the container substrate, thereby forming the container V40. A flange portion V44 of the container is inclined toward the bottom side and extends outward. When the top film is sealed by sealing the thermoplastic film to the flange portion V44 of the formed container, the flange portion is pulled toward the side opposite to the bottom side due to the shrinkage of the thermoplastic film due to the temperature drop. Thereby, since a top film can be made flat with respect to container V40, it becomes possible to improve the appearance of the product which carried the top film on the container.

When the container base is a container base having a large depth with respect to the opening area, deep drawing may be performed with a large expansion ratio of the heat-softened thermoplastic film (thermoplastic sheet S1).
For example, in the molding trimming machine 300 shown in FIG. 20, a plug 562 is provided on the lower surface of the holding member 560 facing the housing portion 530, and deep drawing is performed by plug assist molding. That is, when the upper and lower tables 580 and 320 are brought close to each other and the housing part 530 and the holding member 560 are brought close to each other, the plug 562 enters the housing part 530 and the thermoplastic film S1 is pushed into the housing part 530. In this case, the thickness of the film S1 to be laminated and bonded to the bottom V13a of the container substrate V1 can be increased, and a high-quality laminate container can be obtained.

  Further, in the molding trimming machine 300 shown in FIG. 21, a preceding clamp member 564 is provided between the thermoplastic film S1 and the molding die accommodating portion 530. The member 564 is horizontally disposed with openings 565 aligned with the periphery of the holding frames 730, and can be moved upward by an air cylinder (not shown). When compressed air is supplied to the air cylinder to raise the preceding clamp member 564, the preceding clamp member 564 presses and holds the film S1 against the upper table 580 around each holding frame 730 as shown in FIG. Thereafter, the upper and lower tables 580 and 320 are brought close to each other to bring the accommodating portion 530 and the holding member 560 into close proximity, and vacuum / pressure forming is performed. That is, the preceding clamp member 564 moves in the direction of the holding member 560 and clamps the heat-softened thermoplastic film S1 around the holding member 560 before bringing the housing portion 530 and the holding member 560 close to each other. When using a thin thermoplastic sheet such as a thermoplastic film, especially when a plurality of molds 520 are provided, the thickness of the thermoplastic film is not constant by pulling the thermoplastic film at each molding location during vacuum / pressure forming. There is. By performing the preceding clamping, the area of the thermoplastic film used for molding can be fixed and the thickness of the film S1 laminated and adhered to each container substrate V1 can be made constant, so that a high-quality laminate container can be obtained.

  Further, as in the molding and trimming machine 300 shown in FIG. 22, after the thermoplastic film S1 is stretched in advance by performing weak blow (pressure air) using the micro-pressure air supply mechanism 820, the upper and lower tables 580 and 320 are brought close to each other. Thus, the accommodating portion 530 and the holding member 560 may be brought close to each other to perform vacuum / pressure forming. That is, the micro-pressure air supply mechanism 820 of the present modified example supplies the blow in the direction of the accommodating portion 530 to the thermoplastic film S1 in the heat-softened state before bringing the accommodating portion 530 and the holding member 560 in proximity to each other. The film S1 is stretched in the direction of the housing part 530. With the help of stretching the thermoplastic film by blowing, the thickness of the film S1 to be laminated and adhered to the bottom V13a of the container base V1 can be increased, and a high-quality laminate container can be obtained.

Note that the plug assist molding, the preceding clamp, and the blowing may be performed independently or in combination.
As described above, according to the present invention, a useful container forming apparatus, sheet conveying apparatus, container manufacturing method, and sheet conveying method can be provided according to various aspects.

It is a block diagram which shows the outline of a starchy container manufacturing system. It is sectional drawing which shows the principal part of a molding machine in a vertical cross section. It is a vertical sectional view showing how the upper and lower molds are closed to form the material. It is a vertical sectional view which shows a mode that a container base material is formed. It is a perspective view which shows the external appearance of a container base material and the container before an end surface process. FIG. 6 is a vertical sectional view seen from the position of A1-A1 in FIG. 5. It is a side view which shows the structure of a container base material conveying apparatus. It is a side view which shows the structure of a lower table and a lower table drive mechanism. It is a perspective view which shows the external appearance of a shaping | molding trimming machine. It is a vertical sectional view of a forming trimming machine. It is a vertical sectional view showing a state when a holding member holds a sheet. It is a vertical sectional view showing a state when a sheet is laminated and adhered to a container base material. It is a vertical sectional view showing a state when a Thomson blade presses and cuts a sheet. It is a vertical sectional view showing a state when the lower table is lowered. It is a perspective view which shows the external appearance of a spike holding | maintenance apparatus. It is principal part sectional drawing of a spike holding | maintenance apparatus. It is a disassembled perspective view which decomposes | disassembles and shows the principal part of the lower side of an upper table. It is a timing chart which shows operation | movement of a container formation apparatus. It is a vertical sectional view showing a container base and a container formed in a modification. It is a vertical sectional view of a molding trimming machine of a modification. It is a vertical sectional view showing a main part of a molding trimming machine of a modification. It is a vertical sectional view showing a main part of a molding trimming machine of a modification.

Explanation of symbols

100 ... Container substrate forming device (container substrate forming mechanism),
200 ... container base material conveying device,
220 ... container base material supply machine (container base material supply mechanism),
230 ... conveyor, 240 ... suction conveyor,
260 ... heating machine (container base material preheating mechanism),
300 ... molding trimming machine,
320 ... lower table, 322 ... mold accommodation hole,
340 ... Lower table drive mechanism,
380 ... Container unloader,
420: a sheet conveying mechanism,
421 ... Chain rail, 422 ... Outer frame, 423 ... Spike receiving member,
425 ... endless chain, 425b ... spike member (sheet holding member),
432 ... Roll sheet unwinding machine, 434 ... Scrap winder,
440 ... heater, 442 ... heater,
460 ... holding part cooling mechanism, 470 ... air ejection mechanism,
520 ... Metal mold, 522 ... Back plate, 524 ... Heater,
530 ... accommodating portion, 530a ... opening, 532 ... accommodating surface, 534 ... suction hole,
540 ... cushioning material,
560 ... holding member,
562 ... plug, 564 ... preceding clamp member, 565 ... opening,
580 ... Upper table, 581 ... Air supply hole,
600 ... molding mechanism,
700 ... Trimming mechanism, 720 ... Thomson blade (cutting blade), 730 ... Holding frame,
800 ... negative pressure releasing means,
810 ... Air passage, 820 ... Low pressure air supply mechanism, 830 ... Air passage opening / closing mechanism,
900 ... Control panel,
990 ... Container end face processing machine,
1000 ... Starch container manufacturing system,
L1 ... position before preheating, L2 ... position after preheating,
L11: Container substrate supply position, L12: Molding position, L13: Separation position, L14: Proximity position,
L21: Sheet holding start position, L22: Sheet release position,
S1, V21 ... thermoplastic sheet, S2 ... scrap sheet,
SP1: a space between the thermoplastic sheet and the holding member,
V1, V30 ... container base, V11, V31 ... sheet lamination surface, V12 ... sheet non-lamination surface,
V13, V33 ... concave portion, V13a ... bottom of container base,
V14, V34 ... flange portion, V15 ... end of container base, V16 ... end face of container base,
V20, V40: container before end face treatment, V22: surrounding thermoplastic sheet,

Claims (19)

A container forming apparatus for forming a container by laminating and trimming a thermoplastic sheet on a sheet lamination surface of a breathable container base,
A molding die having an accommodating portion for accommodating the container base material on an accommodating surface capable of sucking air;
Forming the thermoplastic sheet in a heat-softened state provided in such a manner as to be close to and away from the housing portion of the molding die and covering the housing portion when close to the housing, and disposed in the vicinity of the housing portion A holding member capable of being pressed and held around the housing portion in the mold,
The housing part containing the container base and the holding member are brought close to each other, the thermoplastic sheet in the heat-softened state is pressed and held around the housing part by the holding member, and the container base is passed through the container base. A molding mechanism for sucking air and laminating and adhering to the sheet lamination surface of the container substrate;
A cutting blade disposed around at least one of the molding die and the holding member, and the thermoplastic sheet pressed and held by the holding member is pressed by the cutting blade and cut to form the container. A trimming mechanism;
A container forming apparatus comprising: negative pressure releasing means for releasing a negative pressure generated in a space between the thermoplastic sheet and the holding member when the air is sucked from the storage surface at an atmospheric pressure or lower. .   The negative pressure releasing means is formed through the holding member so as to allow air to pass therethrough, and when the holding member and the housing portion come close to each other, a space between the holding member and the thermoplastic sheet and the outside air The container forming device according to claim 1, wherein the container forming device is an air passage connecting the two.   The negative pressure releasing means includes a fine pressure air supply mechanism that supplies air at a pressure equal to or lower than atmospheric pressure to a space between the holding member and the thermoplastic sheet when the housing portion and the holding member are in proximity. The container forming apparatus according to claim 1, characterized in that: The negative pressure releasing means is
An air passage that is formed through the holding member so as to be able to vent and connects the space between the holding member and the thermoplastic sheet and the outside air when the holding member and the housing portion are close to each other;
An air passage opening / closing mechanism that closes the air passage when supplying air below atmospheric pressure by the micro air supply mechanism, and that opens the air passage when air is not supplied by the micro air supply mechanism. The container forming apparatus according to claim 3, further comprising: The molding die with the housing portion on the upper side is arranged on the upper surface, and is movable in the horizontal direction connecting a predetermined container base material supply position to which the container base material is supplied and a predetermined molding position, and the molding A lower table capable of moving the accommodating portion in the vertical direction so as to be close to and away from the holding member at a position;
A lower table drive mechanism that reciprocates in the vertical direction at the molding position while reciprocating the lower table in the horizontal direction;
When the lower table moves upward, the molding mechanism sucks air from the accommodation surface through the container base material, and presses and holds the thermoplastic sheet in a heat-softened state that is pressed and held by the holding member. The container forming apparatus according to claim 1, wherein the container forming apparatus is laminated and adhered to a sheet lamination surface. The mold is made of metal,
The container forming apparatus according to any one of claims 1 to 5, wherein a buffer material that relaxes an impact force applied to the container base is provided on the housing surface. A container base material supply mechanism for transporting the container base material and supplying the container base material to the housing part of the mold
The container base material preheating mechanism which raises the temperature of the said container base material before heating the said container base material conveyed and accommodated in the said accommodating part, The 1st-Claim 6 characterized by the above-mentioned. The container forming apparatus according to any one of the above. A sheet conveying mechanism that holds and conveys a scrap sheet generated by being cut from the thermoplastic sheet by the trimming mechanism in the vicinity of the accommodating unit, and releases the scrap sheet at a predetermined sheet release position;
The container forming apparatus according to any one of claims 1 to 7, further comprising a holding part cooling mechanism that cools a portion of the conveyed scrap sheet held by the sheet holding member. The sheet conveying mechanism conveys the thermoplastic sheet heated and softened by holding both side edges in the width direction of the thermoplastic sheet to be conveyed while being pierced by the sheet holding member to the vicinity of the accommodating portion and the thermoplastic. It is a mechanism for holding both side edges in the width direction of the scrap sheet generated from the sheet as it is with the sheet holding member and releasing the scrap sheet at the sheet release position,
The container forming apparatus according to claim 8, wherein the holding unit cooling mechanism cools only both side edges in the width direction of the conveyed scrap sheet.   The holding unit cooling mechanism is an air ejection mechanism that blows air at a temperature lower than that of the scrap sheet only to a portion of the conveyed scrap sheet held by the sheet holding member. Item 10. A container forming device according to Item 8 or Item 9. The container base has a recess and a flange is formed around the recess.
When forming the container base material, further comprising a container base material forming mechanism for forming a container base material having the flange portion that is inclined toward the bottom side and extends outward from the concave portion,
The molding mechanism forms the container having a flange portion that is laminated and bonded to the sheet lamination surface of the container base material by laminating and bonding the heat-softened thermoplastic sheet to the bottom side and extending outward. The container forming apparatus according to any one of claims 1 to 10, wherein the container forming apparatus is characterized in that:   12. The plug according to any one of claims 1 to 11, wherein the holding member is provided with a plug that enters the housing portion when approaching the housing portion at a portion facing the housing portion. The container forming apparatus as described.   The thermoplastic sheet in the heat-softened state is provided between the thermoplastic sheet in the heat-softened state and the housing part, and is moved in the direction of the holding member before bringing the housing part and the holding member close to each other. The container forming apparatus according to claim 1, further comprising a preceding clamp member that clamps around the holding member.   A mechanism for supplying a blow in the direction of the accommodating portion to the thermoplastic sheet in the heat-softened state before the accommodating portion and the holding member are brought close to each other and extending the thermoplastic sheet in the direction of the accommodating portion; The container forming apparatus according to claim 1, further comprising: A container forming apparatus for forming a container by laminating and bonding a thermoplastic sheet to a sheet lamination surface of a breathable container base material in a foamed state in which a material is foamed and formed into a container shape,
A metal molding die having a housing portion for housing the container base material on a housing surface capable of sucking air;
A cushioning material that is provided on the housing surface and relaxes the impact force applied to the container base material,
The heat-softened thermoplastic sheet disposed in the vicinity of the housing portion by sucking air from the housing surface through the foamed container base housed in the housing portion in contact with the cushioning material A container forming apparatus comprising: a forming mechanism for forming a container by laminating and adhering to a sheet lamination surface of a container base material. A sheet conveying mechanism that holds and conveys a scrap sheet generated by laminating and bonding a heat-softened thermoplastic sheet to a container base material and holding the sheet at a predetermined sheet release position;
A sheet conveying apparatus comprising: a holding portion cooling mechanism that cools a portion of the conveyed scrap sheet held by the sheet holding member. A container forming apparatus for forming a container by laminating and trimming a thermoplastic sheet on a sheet lamination surface of a breathable container base having a recess and a flange formed around the recess,
When forming the container base material, a container base material forming mechanism that forms the container base material having the flange portion that is inclined toward the bottom side and extends outward from the recess,
And a molding mechanism for forming the container having a flange portion that is laminated and bonded to the sheet lamination surface of the container base material and is inclined toward the bottom side and extends outward. Container forming apparatus. A container manufacturing method for manufacturing a container by laminating and trimming a thermoplastic sheet on a sheet lamination surface of a breathable container substrate,
The container base material is housed in a molding die having a housing portion for housing the container base material on a housing surface capable of sucking air,
A holding member that is provided so as to be close to and away from the housing portion of the molding die and that covers the housing portion when close to the housing portion and a housing portion that houses the container base material are brought close to each other. The thermoplastic sheet in the heat-softened state disposed in the vicinity of the housing portion is pressed and held around the housing portion in the molding die, and air is sucked from the housing surface through the container base. Laminate and adhere to the sheet lamination surface of the container substrate,
With the cutting blade arranged around at least one of the molding die and the holding member, the thermoplastic sheet pressed and held by the holding member is pressed and cut to form the container,
A container manufacturing method, wherein a negative pressure generated in a space between the thermoplastic sheet and the holding member when air is sucked from the housing surface is released at an atmospheric pressure or lower. A sheet conveying step of holding and conveying a scrap sheet generated by laminating and bonding a heat-softened thermoplastic sheet to a container base material and holding it at a predetermined sheet release position;
A holding part cooling step for cooling a portion held by the holding member in the scrap sheet to be transferred.

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