JP6770841B2 - Laminated sheet molded product manufacturing method and mold equipment - Google Patents

Description

The present invention relates to a method for manufacturing a laminated sheet molded product and a mold apparatus.

For example, there is a molded product using a sheet material having various functions such as moisture-proof, weather-resistant, light-shielding, heat insulating, oxygen barrier, easy processability, and thermoplasticity, such as food trays and pharmaceutical packaging materials for tablets. .. These sheet materials not only contain additives in the original material to exhibit various functions, but also have the characteristics of the material itself by the functional groups of the raw material molecules, and sheets having desired functions. There are a wide variety of materials such as laminated sheet materials made by laminating.

As an example of the moisture-proof sheet material, there is a laminated sheet material in which a resin layer of an unstretched thermoplastic resin composed of polyethylene, polyamide, polypropylene, polyethylene terephthalate and the like is laminated on a metal layer containing an aluminum foil. Taking advantage of its properties, the moisture-proof sheet material is used by being processed into a molded product having a desired shape in various fields such as food / beverage, pharmaceuticals, electrical / electronic, and chemical material systems.

For example, as an example of a single-layer sheet molded body, a blister molded body having a deep drawn portion formed by forming a polylactic acid-based sheet by pneumatic molding, which is a thermoforming method, is known (Patent Document 1).

Further, for example, as an example of a laminated sheet molded product, a semiconductor moisture-proof packaging bag of a laminated film in which a nylon film, aluminum foil, and polyethylene are laminated is known (Patent Document 2).

Japanese Unexamined Patent Publication No. 2004-58519 JP-A-2002-274594

The polylactic acid-based sheet described in Patent Document 1 is excellent in moldability, but is inferior in light-shielding property because it is transparent. In addition, the polylactic acid-based sheet is inferior in moisture resistance because it cannot suppress the permeation of water vapor and oxygen.

On the other hand, the laminated sheet containing the metal layer such as aluminum foil described in Patent Document 2 and the resin layer such as nylon film or polyethylene is superior in moisture-proof property and light-shielding property as compared with the sheet not containing the metal layer. For this reason, the laminated sheet molded body containing such a metal layer accommodates not only semiconductors but also various objects to be contained that dislike moisture, such as foods / beverages, chemicals, pharmaceuticals, electrical / electronics, and chemical materials. It is used in.

However, since the material processability of the laminated sheet differs from layer to layer, it is suitable for being molded into a pillow wrapping or a three-pack sealing bag that seals the end portion without pulling the laminated sheet. In particular, when a cup shape having a desired depth is formed on a laminated sheet by drawing, any layer constituting the laminated sheet may be destroyed, which makes processing difficult.

In order to solve the above problems, in the method for manufacturing a laminated sheet molded product according to the present invention, a laminated sheet in which the first and second sheets are laminated on each other is supplied between the first and second molds. It has a step and a step of forming a cup shape of a desired depth into a laminated sheet using the first and second dies. The first mold has a female mold portion having a bottom surface and side surfaces surrounding the bottom surface. The second mold has a male mold portion that can be fitted to the female mold portion. The first and second dies are configured such that the male die presses the laminated sheet against a portion of the surface of the female die portion. In the step of forming the cup shape, a part of the region moves from the first region of the side surface through the bottom surface toward the second region of the side surface.

It is possible to provide a laminated sheet molded product having a cup shape having a desired depth.

It is the schematic for demonstrating the manufacturing method of the laminated sheet molded article 8 which concerns on this embodiment. It is a schematic diagram of a molding die 5. It is a figure for demonstrating the processing by a molding die 5. It is a schematic diagram of a continuous molded body 6. It is a schematic diagram explaining the layer structure of the laminated sheet 11. It is a perspective view of the laminated sheet molded body 8. It is A cross-sectional view of the laminated sheet molded body 8. It is a schematic diagram for demonstrating an example of the modification of the manufacturing apparatus which concerns on this embodiment.

Hereinafter, the manufacturing method and the manufacturing apparatus of the laminated sheet molded body 8 according to the present embodiment will be described with reference to the drawings. Examples of a laminated sheet molded body composed of three layers are given, but the present invention is not limited to this. The laminated sheet molded body 8 may have two layers, four layers, or more as long as it is composed of a plurality of layers.

FIG. 1 is a schematic view for explaining a method of manufacturing the laminated sheet molded body 8 according to the present embodiment.

The manufacturing apparatus of the laminated sheet molded body 8 includes a nip roll 4, a molding die 5 as a die device, a heater 10, and punching dies 7a and 7b. Further, in the manufacturing apparatus, a first sheet roll 1 in which a metal foil 1a as a first sheet roll is wound in a roll shape and a resin film 2a as a second sheet roll are wound in a roll shape. A second sheet roll 2 formed by being turned and a third sheet roll 3 formed by winding the resin film 3a as the third sheet roll in a roll shape are installed.

The thickness and material of the metal foil 1 are not particularly limited and can be selected according to the intended use. In this embodiment, for example, an aluminum foil using aluminum or an aluminum alloy is applied. For example, an aluminum foil having a thickness of 0.035 to 0.150 mm may be used. Furthermore, among the aluminum and aluminum alloys specified in JIS H4000, it is desirable to use an aluminum foil based on 5082, 5083, 8021, 8079 and the like. As the metal foil, other types of metal foil such as stainless steel foil may be used.

The material and thickness of the resin films 2a and 3a are not particularly limited and can be selected according to the intended use. In this embodiment, a thermoplastic synthetic resin film is used. Specifically, a resin film such as polyethylene, polyamide, polypropylene, or polyethylene terephthalate is applied. For example, it is desirable to use a resin film having a thickness of 0.050 to 0.100 mm containing a polyethylene resin or a polypropylene resin as a main component. The resin films 2a and 3a may be made of the same material and thickness, or may be made of different materials and thicknesses. Further, the resin films 2a and 3a may be formed with a plurality of air vent holes penetrating in the thickness direction thereof. Further, the surfaces of the resin films 2a and 3a do not have to be flat, and irregularities may be formed.

The nip roll 4 has a pair of rolls, and a plurality of sheet materials transported in the transport direction are brought into close contact with each other in a state of being overlapped with each other. In the present embodiment, the metal foil 1a and the resin films 2a and 3a are brought into close contact with each other by passing through the nip roll 4, and are conveyed as the laminated sheet 11 in the conveying direction.

In the present embodiment, a plurality of sheet materials overlapped by the nip roll 4 are brought into close contact with each other, but if the air is removed from the plurality of sheet materials overlapped and brought into close contact with each other, the number, material, roll diameter, etc. The configuration is not limited. For example, each roll may have elasticity and the gap between the opposing rolls may be set to be slightly narrower than the total thickness of the plurality of sheet materials. For example, the material may be rubber having a hardness of 70-90 or a radial crown shape. Further, the gap between the rolls may be set to be narrower by about 0.010 mm to 1.000 mm than the total thickness of the metal foil 1a and the resin films 2a and 3a.

FIG. 2 is a schematic view of the molding die 5. The molding die 5 is a substantially columnar mold set for molding a cup shape on the laminated sheet 11. In the present embodiment, the molding die 5 includes a roll base die 52, a first roll die 51, and a second roll die 53. It should be noted that the sheet material transport mechanism may be provided on its own, or another transport mechanism may be used.

The roll base 52 has one or more female mold portions 520 on its outer circumference. The female mold portion 520 includes a female mold forming surface for forming a cup shape. The female molding surface includes a bottom surface 521 and side surfaces 522 and 523 surrounding the bottom surface 521. Further, in the illustrated example, four female mold portions 520 are formed on the outer periphery of the roll base mold 52 at substantially equal intervals in the circumferential direction, but the number of female mold portions 520 formed on the roll base mold 52 is large. , Not limited to this. Further, the roll diameter may be changed depending on the molding shape and molding size.

The first roll mold 51 is installed so as to face the roll base mold 52. The first roll mold 51 and the roll base mold 52 involve the laminated sheet 11 supplied from the upstream in the transport direction and transport it downstream. The first roll die 51 and the roll base 52 form a cup shape having a desired depth by applying drawing processing stepwise to the laminated sheet 11 conveyed in the conveying direction.

Specifically, for example, the first roll mold 51 has one or more male mold portions 510 on its outer circumference. The male portion 510 is a portion that fits into the female portion 520. In the movable state, one or more male mold portions 520 of the first roll mold 51 are formed so as to be fitted into one or more female mold portions 520 of the roll base mold 52 in a gear shape. The male mold portion 510 includes a male mold molding surface of a mold for forming a cup shape. The male molding surface is configured to press the laminated sheet against a portion of the female molding surface of the female mold portion 520. The male molding surface includes a top surface 511 facing the bottom surface 521 and side surfaces 512 and 513 facing the side surfaces 522 and 523 in a state where the male mold portion 510 is fitted to the female mold portion 520.

Further, the first roll mold 51 has a jacket mechanism (not shown) for heating the laminated sheet 11. The jacket mechanism for heating may be heated to a temperature equal to or higher than the degree at which the resin films 2a and 3a are softened. The temperature of the jacket mechanism may be set in any way according to the material of the sheet material, room temperature, and the like. In the mated state, even if the male mold portion 510 and the female mold portion 520 are set to a shape such that the molding surfaces do not come into contact with each other (that is, a state with a certain gap). Good. The degree of the gap may be set by the thickness of the laminated sheet 11.

The second roll mold 53 is installed on the downstream side in the transport direction with respect to the first roll mold 51 and facing the roll base mold 52. The second roll mold 53 and the roll base mold 52 involve the laminated sheet 11 supplied from the upstream in the transport direction and transport it downstream. The second roll mold 53 and the roll base 52 cool the laminated sheet 11 (continuous molded body 6 described later) having a cup shape that is conveyed in the conveying direction.

Specifically, for example, the second roll mold 53 has one or more male mold portions 530 on its outer circumference. The male portion 530 is a portion that fits into the female portion 520. The male portion 530 is a portion that fits into the female portion 520. In the movable state, one or more male mold portions 530 of the second roll mold 53 are formed so as to be fitted into one or more female mold portions 520 of the roll base mold 52 in a gear shape. The male mold portion 530 includes a male mold molding surface of a mold for molding a cup shape. The male molding surface is configured to press the laminated sheet against a portion of the female molding surface of the female mold portion 520. The male molding surface includes a top surface 531 facing the bottom surface 521 and side surfaces 532 and 533 facing the side surfaces 522 and 523 in a state where the male mold portion 510 is fitted to the female mold portion 520. Further, the second roll mold 53 has a jacket mechanism (not shown) for cooling the continuous molded body 6. The jacket mechanism for cooling may be cooled to such an extent that the laminated sheet can be conveyed. The temperature of the jacket mechanism may be set in any way according to the material of the sheet material, room temperature, and the like. In the mated state, even if the male mold portion 530 and the female mold portion 520 are set to a shape such that the molding surfaces do not come into contact with each other (that is, a state with a certain gap). Good. The degree of the gap may be set by the thickness of the laminated sheet 11.

Regarding the manufacturing apparatus, the roll arrangement, diameter, quantity, etc., supply mechanism, degassing mechanism at the time of molding, cooling mechanism, etc. are not shown, and do not necessarily match the actual arrangement. The arrangement of each component of the manufacturing apparatus is not limited to that of the above description and illustrated examples. Further, the shape and size of each mold are not limited to those shown in the illustrated examples. The radius is not particularly limited in each roll or mold. The mechanism for transporting each sheet material may be any. It may be transported continuously or intermittently. Further, in the present embodiment, it has been described that each component is included in one manufacturing apparatus, but the present invention is not limited to this. Each component may be divided and arranged in a plurality of devices.

Next, the manufacturing method of the laminated sheet molded body 8 will be described step by step. The metal foil 1a is unwound from the first sheet roll 1, the resin film 2a is unwound from the second sheet roll 2, and the resin film 3a is unwound from the third sheet roll 3 and supplied to the nip roll 4. At this time, the resin films 2a and 3a are supplied so as to be superposed on the upper and lower sides of the metal foil 1a. For example, a brake mechanism (not shown) may be provided in the feeding portions of the first to third seat rolls 1, 2, and 3. As a result, tension is applied to each of the sheet materials 1a to 3a so that the sheet material 1a to 3a is unwound.

The resin film 2a, the metal foil 1a, and the resin film 3a are superposed on each other and pass through while being pressed by the nip roll 4, so that air between the sheets is evacuated and the laminated sheet 11 is formed. Depending on the material of the sheet material or the like, an adhesive or the like may be applied between the metal foil 1a and the resin films 2a and 3a, respectively, or the metal foil 1a, the resin films 2a and 3a are simply superposed. It may be.

The laminated sheet 11 is preheated by the heater 10 and supplied to the molding die 5. Each heater 10 is set to a temperature at which the resin films 2a and 3a can be softened so as to be easily processed. The temperature of each heater 10 differs depending on the type of resin film and may be set in any way. For example, in the case of a resin containing a polyethylene-based or polypropylene-based resin as a main component, it is desirable to set the temperature at around 70 to 90 ° C.

A cup shape is formed on the laminated sheet 11 between the first roll mold 51 and the roll base mold 52. Specifically, in the laminated sheet 11, the resin films 2a and 3a that are heated and softened by the female mold portion 520 of the roll base mold 52 and the male mold portion 510 of the first roll mold 51 are the metal foil 1a. The three layers are adhered to the upper and lower surfaces to integrate the three layers, and drawing is applied stepwise from the upstream side to the downstream side in the transport direction.

FIG. 3 is a diagram for explaining each process by the molding die 5. First, a process of forming a cup shape by the male mold portion 510 of the first roll mold 51 and the female mold portion 520 of the roll base mold 52 will be described. In this step, the male mold molding surface of the male mold portion 510 presses the laminated sheet against a part of the female mold molding surface of the female mold portion 520. Then, this part of the region moves from the side surface 512a on the downstream side in the transport direction through the bottom surface 521 to the side surface 512b on the upstream side in the transport direction. Hereinafter, a specific description will be given.

The laminated sheet 11 is supplied between the first roll mold 51 and the roll base mold 52 (a). For example, the laminated sheet 11 may be supplied in a state of being tensioned on the upstream side in the transport direction and in the direction perpendicular to the transport direction. Then, the laminated sheet 11 is gradually pressed by the side surfaces 512a and 522a on the downstream side in the transport direction (b). The laminated sheet 11 is then gradually pressed by the top 511 and the bottom 521 (c). Next, the laminated sheet 11 is gradually pressed by the side surfaces 512b and 522b on the upstream side in the transport direction (d).

As a result, the laminated sheet 11 is gradually rolled from the downstream side to the upstream side in the transport direction, and a cup shape is formed on the laminated sheet 11. In the steps (a) to (d), both side surfaces 513 and 523 of the male mold portion 510 and the female mold portion 520 are gradually pressed and molded on both side surfaces of the laminated sheet 11 perpendicular to the transport direction. Will be done.

In this way, the laminated sheet 11 is gradually pressed from the downstream to the upstream in the transport direction by the male mold portion 510 of the first roll die 51 and the female mold portion 520 of the roll base mold 52. As a result, a molded body (laminated sheet molded body 8) made of the laminated sheet 11 to which the resin films 2a and 3a are adhered to each other is sequentially generated inside and outside the metal layer made of the metal foil 1a. A molded body in which a plurality of laminated sheet molded bodies 8 formed in this step are connected is referred to as a continuous molded body 6 (FIG. 4).

The transport speed of the molding die 5 may be set in any way depending on the material of the laminated sheet 11 and the heating temperature. For example, in this embodiment, the laminated sheet 11 is conveyed at a speed of 100 to 300 mm / sec.

Further, the linear pressure between the first roll mold 51 and the roll base mold 52 can also be adjusted by the material of the laminated sheet 11 and the heating temperature. Any setting may be made as long as it can be molded. For example, in this embodiment, it is assumed that the press is performed at a linear pressure of 300 to 380 kg / cm.

The continuous molded body 6 is supplied between the second roll mold 53 and the roll base mold 52. Specifically, the continuous molded body 6 formed by the first roll mold 51 and the roll base 52 is conveyed while being placed on the female mold portion 520 of the roll base 52, and is conveyed to the second roll mold 52. It is cooled by 53.

The movement of the second roll mold 53 and the roll base mold 52 in the cooling step is the same as that of the first roll mold 51 and the roll base mold 52. That is, the male mold molding surface of the male mold portion 530 presses the laminated sheet against a part of the female mold molding surface of the female mold portion 520. The detailed description will be omitted because it is as described in FIG. Further, the linear pressure between the second roll mold 53 and the roll base mold 52 may be set in any way depending on the material of the laminated sheet 11 and the cooling temperature. For example, in the present embodiment, the laminated sheet 11 is compression-molded at a linear pressure of 200 to 300 kg / cm. Here, since it suffices to be cooled, it is not an essential element to be pressed by the male mold portion 531 of the second roll mold 53 and the female mold portion 520 of the roll base mold 52.

The continuous molded body 6 is sequentially supplied between the punching dies 7a and 7b in a state where both ends in the direction perpendicular to the transport direction are pinched, and a surplus portion (a surplus portion for cutting out each laminated sheet molded body 8 by pressing). The so-called ear) is separated. Then, by injecting a large amount of compressed air from the nozzle 9, foreign matter is removed, and the laminated sheet molded body 8 is obtained. The punching pressure in the punching dies 7a and 7b may be set to any value as long as the laminated sheet molded body 8 can be punched from the continuous molded body 6. For example, it is desirable that the punching process is performed at a pressure of about 100 kgf / mm ² .

The punching process is performed according to, for example, the punching virtual line 21. The punched virtual line 21 does not have to actually exist. In this case, the punched virtual line 21 is assumed to be formed at a position where the continuous molded body 6 is punched by the laminated sheet molded body 8 when the continuous molded body 6 is supplied between the punching dies 7a and 7b. The operation of removing the laminated sheet molded body 8 and the ears from the punching dies 7a and 7b may be performed manually or mechanically. Further, in the punching process, the processing method is not particularly limited, and the punching die may be replaced with a biku die, an engraving die, a pinnacle die or the like.

The laminated sheet molded body 8 according to the present embodiment is airtightly sealed by heat-sealing a sealing sheet containing an aluminum foil on the peripheral edge portion 30b after the object to be contained is accommodated in the accommodating portion 30a formed in a cup shape. Will be done. As a result, the moisture-proof property, weather resistance, light-shielding property, etc. of the contained object can be maintained.

According to the above manufacturing method, the laminated sheet molded body 8 having the accommodating portion 30a having a desired depth can be molded from the laminated sheet 11 in which different types of sheet materials are laminated.

If one laminated sheet is processed to a desired depth, one of the layers may be broken due to the difference in material processability such as ductility between different materials. In particular, when a laminated sheet containing a metal layer and a resin layer is used to form a cup shape having a depth of a certain level or more, the metal layer may break. Further, when drawing is applied using a pair of dies (male mold and female mold) for forming a cup shape, the laminated sheet is pressed downward at once, so that the load applied to each layer of the laminated sheet is large and the laminated sheet is broken. There is a high possibility of doing.

On the other hand, in the method for manufacturing the laminated sheet molded body 8 according to the present embodiment, the male mold portion 510 of the first roll mold 51 passes from the side surface 522a of the female mold portion 520 of the roll base mold 52 to the side surface 521 through the bottom surface 521. By gradually pressing the laminated sheet 11 toward 522b, each layer is gradually rolled, so that breakage of each layer due to a difference in different materials can be prevented. In particular, it is possible to prevent breakage of the metal layer having low ductility.

Further, even in the method of producing a laminated sheet molded body having a cup-shaped accommodating portion by applying drawing processing to the laminated sheet, it is possible to improve the workability by increasing the thickness of the metal foil. .. However, since the laminated sheet itself becomes thick, problems in terms of moldability and cost remain. In addition, thick metal foil is difficult to wind up due to the malleability of the material. For this reason, it is possible to deal with this by increasing the core of the sheet roll of metal foil, but if the winding length is increased, the outer diameter becomes larger, the handleability deteriorates, and the device also needs to be enlarged. .. Further, the thicker the thickness, the more a step is generated at the center of the core, and since it is not an elastic deformed body, defects are likely to occur partially on the center side of the winding roll. On the other hand, if the winding length is shortened, the production efficiency deteriorates. As described above, the method of forming the cup shape by applying the drawing process to the laminated sheet has problems in terms of both product and manufacturing.

In particular, when processing a laminated sheet having a thickness (t) of about 0.100 to 0.400 mm, in order to prevent the metal layer from breaking, a relatively shallow drawing process (for example, a depth (h) within 5 mm) is performed. It must be done, and it is difficult to draw at a depth higher than this. However, according to the manufacturing method according to the present embodiment described above, by stepwise pressing the laminated sheet 11, the laminated sheet 11 has a stacking portion 30a having a certain depth (for example, a depth (h) of 5 mm or more). The sheet molded body 8 can be formed.

Thereby, in the laminated sheet molded body 8, the thickness (t) of the laminated sheet, the depth (h) of the laminated sheet molded body 8 and the angle (θ) of the side wall of the laminated sheet molded body can be designed relatively freely (FIG. FIG. 6). Specifically, if the laminated sheet has a thickness (t) of about 0.100 to 0.400 mm, a laminated sheet molded body having a depth (h) of 10 mm or more can be formed by drawing. More preferably, by drawing, a laminated sheet molded product having h = 10 mm to 20 mm (more preferably 10 mm to 18 mm), θ = 10 ° or less, and t = 135 to 350 μm can be molded.

The laminated sheet molded body 8 according to the above manufacturing method can have moisture-proof property, weather resistance, light-shielding property, and the like, and can have a cup-shaped accommodating portion 30a having a desired depth. As a result, a three-dimensional object to be contained (an object to be contained having a height relative to the length in the vertical direction and the horizontal direction) can be compactly accommodated.

Further, the laminated sheet molded body 8 heat-sealed by the sealing sheet is discarded after opening. From this point of view, the laminated sheet molded body 8 reduces the area of the sheet material applied to one container as compared with the case where the three-dimensional object is housed in a molded body such as pillow packaging. Can be done. As a result, environmental benefits such as reduction of waste after use and reduction of exhaust gas during transportation can be expected.

In the above-mentioned manufacturing method of the laminated sheet molded body 8, a case where the processing is automatically performed using a manufacturing apparatus has been described. However, some or all of the steps described above may be performed manually. Moreover, each step may be performed intermittently. The control of each process may be based on the unit operation that is the most rate-determining, and each process may be operated.

Further, in the present embodiment, the method for producing the laminated sheet molded body 8 having the metal layer as the intermediate layer and the resin layers on the inner layer and the outer layer thereof has been described, but the present invention is not limited thereto. The laminated sheet molded body 8 may have a resin layer on either the inner layer or the outer layer of the metal layer. Further, in the present embodiment, the method of manufacturing the laminated sheet molded product having one metal layer has been described, but the metal layer may be a plurality of layers, and the resin layer may be three or more layers.

The above description and the illustrated example are examples for explaining the present embodiment, and the shape (cup shape) of the accommodating portion 30a is not limited to that of the illustrated example. The shapes of the female mold portion and the male mold portion of the molding dies 51, 52, and 53 are naturally changed according to the shape of the cup to be molded. For example, in order to further prevent the laminated sheet 11 from breaking, a male mold portion and a female mold portion of each molding die may be formed so that the bottom surface or the entire cup shape is formed in a curved shape. However, a male mold portion and a female mold portion of each molding die may be formed so as to form a plurality of step portions on the side portions of the cup shape.

The inside of the first roll mold 51 is provided with a flow path through which the heat medium passes to the jacket mechanism for heating (not shown). Further, inside the second roll mold 53, a flow path through which the refrigerant passes to the jacket mechanism for cooling is provided (not shown).

However, the mechanism for heating or cooling the first roll mold 51 or the second roll mold 53 does not necessarily have to be a jacket mechanism, and may be any mechanism. For example, a Peltier element, a planar heating element, or the like may be used instead of the jacket mechanism. These can change the temperature in a short time, and can easily release the roll mold and the laminated sheet molded body.

Further, in order to improve the releasability of the laminated sheet molded body 8 from the molding dies 51, 52, 53, a silicone-based or fluorine-based material may be used as the surface material.

Also, the heater 10 is not an essential component. Preheating can be omitted by adjusting the molding speed of the laminated sheet molded body 8 in the first roll mold 51 and the roll base mold 52.

Further, the second roll mold 53 is not an essential component either. Any configuration may be used as long as there is a mechanism for cooling the laminated sheet molded body 8 heated in the first roll mold 51 and the roll base mold 52.

Further, in the present embodiment, the roll base mold 52 is provided with the female mold portion 520, and the first and second roll molds 51 (53) are provided with the male mold portion 510 (530), respectively. Not limited to. A male mold portion may be provided on the roll base mold 52, and a female mold portion may be provided on the first and second roll molds 51 (53), respectively.

The molding die 5 may have any structure as long as the laminated sheet can be pressed stepwise. For example, in the above-mentioned molding die 5, either one of the roll base die 52 and the first roll die 51 may be a flat die. Further, as shown in FIG. 8, instead of the roll-shaped molding die 5, a pair of molding dies (male) 50a and (female) 50b may be used to apply drawing to the laminated sheet 11. Good. In this case, for example, the laminated sheet 11 is pressed stepwise (divided into a plurality of times) to gradually form a cup shape.

1. 1. First sheet roll 1a. Metal foil 2. Second sheet roll 2a. Resin film 3. Third sheet roll 3a. Resin film 4. Nip roll 5. Molding mold 6. Continuously molded body 7a. Punching die (male side) 7b. Punching die (female side) 8. Laminated sheet molded body 9. Nozzle 10. Heater 11. Laminated sheet 21. Punched virtual line 51. First roll mold 52. Roll base type 53. Second roll mold 510. Male part 520. Female part 530. Male part

Claims (8)

In the method of manufacturing a laminated sheet molded product,
A step of supplying a laminated sheet in which the first and second sheets are superposed on each other between the first and second molds, and
A step of forming a cup shape having a desired depth on the laminated sheet using the first and second dies, and
Have,
The first mold has a female mold portion including a bottom surface and a side surface surrounding the bottom surface.
The second mold has a male mold portion that can be fitted to the female mold portion.
The first and second dies are configured such that the male portion presses the laminated sheet against a portion of the surface of the female portion.
In the step of forming the cup shape, the partial region moves from the first region of the side surface through the bottom surface toward the second region of the side surface .
The first sheet contains a metal foil and the second sheet contains a thermoplastic resin film.
The step of forming the cup shape includes a step of heating the laminated sheet.
Production method. The laminated sheet is conveyed between the first and second molds in the conveying direction, and is conveyed.
In the female portion, the first region is located on the downstream end side of the side surface in the transport direction, and the second region is on the upstream end side of the side surface in the transport direction. Located in,
The manufacturing method according to claim 1. After the step of forming the cup shape, there is a step of cooling the laminated sheet.
The manufacturing method according to claim 1 or 2 . The first and second molds are a pair of substantially columnar molds.
One or more female mold portions are formed on the outer circumference of the first mold.
One or more first male mold portions are formed on the outer circumference of the second mold.
The one or more female portions and the one or more first male portions are gear-fitted.
The manufacturing method according to any one of claims 1 to 3 . It has a third mold that is downstream in the transport direction of the second mold and is arranged so as to face the first mold.
The third mold has one or more second male mold portions that fit in a gear manner on the one or more female mold portions.
In the step of molding the laminated sheet, the laminated sheet is cooled by the third mold.
The manufacturing method according to claim 4 . The metal foil has a thickness of 0.035 mm to 0.150 mm.
The manufacturing method according to claim 1 , wherein the depth of the cup shape is 10 mm to 20 mm. Each has a rotatable, substantially columnar first and second mold,
The first and second molds rotate so as to sandwich and convey the laminated sheet in which the first sheet and the second sheet are overlapped with each other in the conveying direction.
The first mold has one or more female mold portions including a bottom surface and a side surface surrounding the bottom surface on the outer periphery thereof.
The second mold has one or more first male mold portions that engage with the female mold portion on the outer periphery thereof.
Said one or more female part and the one or more first male part is fitted to the gear type,
It also has a third mold that is rotatable and substantially cylindrical,
The third mold is arranged so as to face the first mold, has one or more second male mold portions that engage the one or more female mold portions, and holds the laminated sheet. Has a cooling function to cool,
Mold device. The male portion presses the laminated sheet against a partial region of the surface of the female portion, and the partial region passes from the first region of the side surface to the bottom surface of the side surface. The first and second molds are configured to move towards the second region.
The mold device according to claim 7 .

Images