JPH0667591B2 - Molding equipment for composite containers - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a molding device for a composite container, and more specifically, a composite device in which paper is laminated on the surface of a container body made of a foamed sheet of thermoplastic resin. An apparatus for molding a container.

<Prior Art> Conventionally, in a container made of a foamed sheet for containing food or the like, a bar code or the like for displaying information such as a pattern, a trademark, a product name, a product type or a price is provided on the outer peripheral surface thereof. It is being printed.

However, when printing is directly performed on the surface of the foamed sheet, there is a disadvantage that the printing ink does not ride well and clear printing cannot be performed. In particular, for a bar code, if the printing is unclear, it becomes difficult to read it optically, and the function cannot be fulfilled.

For this reason, it has been attempted to stack paper on the outer periphery of a container body made of a foamed sheet and perform printing on the paper surface.
The stacking of the above paper is also suitable for reinforcing the container body.

Conventionally, as a manufacturing technique of a composite container using the above-mentioned paper and a foamed sheet, after the container body is formed into a sheet, a belt-shaped paper is wound around the outer periphery of the container body and joined.

<Problems to be Solved by the Invention> According to the above-described manufacturing technique, since the paper is attached after the fact, the paper causes a step on the outer periphery of the container, which is not preferable in appearance because of a poor sense of unity and the container body. There is a problem that it is difficult to bring the paper and the paper into close contact with each other, sufficient integrity cannot be secured, and the reinforcing effect cannot be exerted so much. Moreover, there is a problem that the manufacturing process is complicated and the manufacturing cost is high.

In particular, in the case of a container made of a foamed sheet and having a flat bottom area larger than that of the side wall, only by winding the strip-shaped paper around the side wall, the reinforcing effect is small, and the side wall of the foamed sheet container is It is desired to bond the paper in a wide range from the bottom to the bottom.

<Objects of the Invention> The present invention has been made in view of the above points, and a step is not generated on the surface of the container, the appearance is good, the container body and the paper are excellent in integration, and the reinforcing effect is also obtained. An object of the present invention is to provide a molding apparatus for a composite container, which can easily and inexpensively manufacture an excellent composite container.

<Means for Solving Problems> As a molding device for a composite container of the present invention for achieving the above object, a composite container in which a piece of paper is laminated on the outer surface of a container body made of a thermoplastic resin sheet is used. A device for molding, a sheet supply means for intermittently running the thermoplastic resin sheet in one direction, a heating means for heating and softening the thermoplastic sheet supplied by the sheet supply means, and a downstream side of the heating means. And a sheet feeding line having a pair of sheet feeding positions arranged at equal distances from both sides of the sheet feeding means with the intersection intersecting the sheet feeding means, and one of the sheet feeding lines In the position, one female die to which the developed paper piece is fed, and the other female die to which the developed paper piece is fed in the other paper feeding position of the paper feed line, and one female die When both female molds are held so that the other female mold is located at the intersection when the female molds are located at the corresponding paper feeding positions, both female molds are reciprocally driven together along the paper feeding line. The reciprocating drive means, the paper supply means for supplying the corresponding developed paper pieces to the female molds when the female molds are located at the corresponding paper feed positions, and the paper supply means provided above the intersection. When the female die to which the developed paper piece is supplied is located at the intersection, the thermoplastic sheet heated and softened by the heating means is pushed into the female die to form a predetermined shape at the same time. Forming means for joining and integrating the paper piece supplied to the female mold side with the thermoplastic sheet, and trimming means for trimming an integrally formed product of the paper piece and the thermoplastic resin sheet. <Operation> Composition of composite container According to the molding apparatus, when one of the female is moved to the feeding position corresponding thereto, by the paper feeding means, it can be supplied to paper in the developed shape in the female.

Next, by driving both female dies together by reciprocating drive means, when one of the female dies is moved to the intersection, a thermoplastic resin sheet sent in a heated state by the heating means is molded. It is possible to form a predetermined shape along the inside of the one female mold by means, and at the same time, integrally join the paper piece and the thermoplastic resin sheet supplied to the female mold side from the bottom to the upper end. it can.

During the above operation, the other female die is positioned at the corresponding paper feed position, and the developed paper piece is fed at that paper feed position.

Therefore, when both female dies are driven in the other direction by the reciprocating drive means after the above steps, the one female die is positioned at the corresponding sheet feeding position, and
The other female mold will be located at the intersection.

Thus, by reciprocating together with both female molds in a half-phase offset between the corresponding paper feed position and the intersection,
The paper feeding process and the molding process can be performed simultaneously in one and the other female molds, respectively.

The integrally molded product of the paper piece and the thermoplastic resin sheet is trimmed into a predetermined composite container shape by trimming means.

<Examples> Detailed description will be given below with reference to the accompanying drawings showing examples.

FIG. 1 is a schematic plan view showing a molding apparatus for a composite container of the present invention, and illustrates a case where a deep dish-shaped composite container is formed by a rectangle (including a square). FIG. 2 is a side view of a paper feed line including a cross section in part.

In FIG. 1 and FIG. 2, the above-mentioned molding apparatus is roughly configured such that a predetermined piece of paper (P) is laminated on the surface of the container body (A1).
3) Paper feed line (L) that feeds (see Fig. 6) toward the long foam sheet (S) (direction of arrows (A) and (A '))
1), a sheet supply line (L2) that runs a long foam sheet (S) crossing the sheet feed line (L1) intermittently, and a sheet feed position of the sheet feed line (L1) In (X1) and (X2), a pair of paper storage hoppers (2) and (2 ') for storing a large number of single paperboards (P) and a semi-punched part (P1) of the single paperboards (P) have a predetermined shape. 2 having molding portions (31) (31 ') (see FIG. 2) for molding into
Paper feeding means (4) (4 ') for feeding two female molds (3) (3') and at least a half punched portion (P1) of the single board (P) to the female molds (3) (3 ')
(See FIG. 2), a heating furnace (5) as a heating means for heating and softening the foamed sheet (S), and the heat-softened foamed sheet (S) into a female mold (3).
At the same time it is pressed into (3 ') and molded into a predetermined shape,
It is composed of a male mold (7) as a molding means which is integrated with the paper piece (P3) transferred directly under the foamed sheet (S) in a state of being attached to the female molds (3) and (3 '). ing. The details will be described below.

As shown in FIGS. 1 and 3, the sheet supply line (L2) heats the foamed sheet (S) fed from the original roll (1) by the chain conveyor (20) through the heating furnace (5). In order to soften and intermittently feed above a predetermined portion of the sheet feeding line (L1), the sheet feeding line (L1) (shown by a thin line in the figure) is crossed. The traveling of the chain conveyor (20) and the foam sheet (S) is guided by a guide member (22) having a U-shaped cross section.

Then, as a predetermined paper piece (P3) to be conveyed along the paper feed line (L1), a half-punched portion (P1) of the single board (P) is used.
The semi-punched part (P1) is partially preliminarily cut by providing a non-cut part (P2). The contour shape of the semi-punched part (P1) is the developed shape of the composite container (A) (see FIG. 6).

As shown in FIGS. 1 and 2, the paper storage hoppers (2) and (2 ') are provided with a paper feed line (L1) and a sheet supply line (L).
Sheet supply line (L2) across the intersection (N) with 2)
Are equidistant from both sides of the. The bottoms of the paper storage hoppers (2) and (2 ') are formed with openings (2a) and (2a') that allow the single board (P) to be taken out downward. Claws (13) for preventing the natural dropping of the single board (P) are attached to 2a) and (2a ').

Further, the paper feed line (L1) is provided with a base (6) along the line, and the air cylinder (8) and the sliding base (9) ( (Indicated by the broken line in FIG. 2)
And are attached. The slide base (9) is connected to the rod (8a) of the air cylinder (8) and can reciprocate between the paper feed positions (X1) and (X2) of the paper feed line (L1).

Then, the base (6), the air cylinder (8), and the sliding base (9) reciprocally drive the female dies (3) and (3 ') described below together along the paper feed line (L1). It constitutes a reciprocating drive means.

A pair of female molds (3) and (3 ') are installed on the sliding base (9) at a predetermined interval in the sliding direction. The female die (3) is installed directly below the opening (2a) of the paper storage hopper (2) when the slide base (9) is moved to one of the paper feed positions (X1). The position of the female die (3 ') is the position that coincides with the intersection (N) at the same time. Further, when the slide base (9) moves to the other paper feed position (X2) side, the female die (3) is at a position matching the intersection (N), and the female die (3 ′) is As shown by the chain double-dashed line in FIG. 2, this is a position directly below the opening (2a ') of the paper storage hopper (2').

At the position of the intersection (N) of the base (6), the female mold (3) or (3 ') moved to this intersection (N) is advanced to the male mold (7) side which will be described in detail later. Therefore, an air cylinder (1) having a rod (10a) that moves forward and backward through the base (6)
0) is provided.

Then, as shown in FIG. 2, the paper feeding means (4) (4 ') is connected to the vacuum suction members (40) (40') and the vacuum suction members (40) (40 ') to the female mold ( 3) Air cylinders (11) and (11 ') which are driven so as to be able to advance to the single paperboard (P) side from the inner depth of (3').

Such vacuum suction members (40) (40 ') are equipped with suction cup-shaped suction parts (41) (41') at the tips thereof, and these suction parts (41) (41 ') are vacuum suction members. When the members (40) (40 ') retract, the molding parts (31) of the female molds (3) (3')
It is provided so as to be flush with (31 ').

As the paper feeding means (4) (4 '), a female die (3) is used.
(3 ') is the opening (2) of the paper storage hopper (2) (2')
a) When moving directly under (2a '), the vacuum suction member (4
0 (40 ') sucks the single board (P) in the paper storage hoppers (2) (2') and pulls it up onto the female dies (3) (3 '), and then the female dies (3) (3) ′) While sucking the single paperboard (P) supplied onto it, the semi-punched part (P1) of the single paperboard (P)
And the surplus part are separated, and only the half-punched part (P1) is drawn into the female mold (3) (3 ') as a paper piece (P3), and the peripheral part is bent, and the female mold (3 ) (3 ') is loaded into the molding parts (31) and (31').

The heating furnace (5) is provided on the upstream side of the intersection (N) as seen in the feeding direction of the chain conveyor (20), and the foamed sheet (S) supplied by the chain conveyor (20) is It is heated to the molding temperature to soften it.
As the heating furnace (5), for example, one having a built-in electric heater is adopted.

As shown in FIG. 2, the male mold (7) has the above-mentioned intersection (N).
To face the female mold (3) or (3 ')
It is provided above the foamed sheet (S) and can be lowered in a predetermined stroke by a drive mechanism (12) such as a cylinder. Further, the male mold (7) has a molding portion (71) that matches with the molding portions (31) (31 ') of the female molds (3) (3'), and the heat-softened foam is formed. The sheet (S) is pushed into the forming parts (31) (31 ') to form a predetermined container (see FIG. 6), and at the same time, the sheet (S) is mounted on the female molds (3) (3') side. The paper piece (P3) and the foamed sheet (S) are joined and integrated.

In FIG. 3, trimming means (16) is provided on the downstream side of the intersection (N) as viewed in the feeding direction of the chain conveyor (20). This trimming means (16)
Is an integrally molded product (B) of the foam sheet (S) and the paper piece (P3) molded by the female mold (3) or (3 ') and the male mold (7), sequentially from the foam sheet (S). It is a punch. As a result, the foamed sheet (S) becomes a surplus sheet (S ') and is appropriately sent to the next step.

According to the molding apparatus having the above-described configuration, firstly, as shown in FIGS.
In the figure, by driving the air cylinder (8) and advancing the rod (8a), the slide base (9) is moved to one paper feed position (X1) side. As a result, the female die (3) is located immediately below the opening (2a) of the paper storage hopper (2).

Next, the air cylinder (11) is driven to direct the vacuum suction member (40) toward the opening (2a) of the paper hopper (2) from the inner part of the forming part (31) of the female die (3). Let it stick out,
The single board paper (P) stored in the paper storage hopper (2) is vacuum-sucked to the half-punched portion (P1).

Next, the air cylinder (11) is driven in reverse to retract the vacuum suction member (40) to the original position, and the half punched part (P1)
Is drawn as a piece of paper (P3) into the inside of each forming part (31) of the female die (3). As a result, the non-cut portion (P2) is cut, and the semi-punched portion (P1) becomes the female die (3) as a piece of paper (P3).
Will be loaded into the molding section (31). At this time, the peripheral part of the paper piece (P3) can be bent upright along the peripheral wall of the forming part (31) (see FIG. 4).

By the vacuum suction member (40), the semi-punched part (P
In order to smoothly and reliably extract 1) from the single board (P) as a piece of paper (P3), the semi-punched part (P) from the single board (P)
A mechanism may be provided for fixing the surplus portion of the single board (P) so that it does not move due to being pulled during punching of 1).

As shown in FIG. 4, such a single board fixing mechanism rotates on a female die (3) as shown by an arrow (D), and uses a vacuum suction member (40) to hold a paper storage hopper (2). In the state where the veneer paper (P ″) taken out from the opening (2a) of FIG. 2) is mounted on the female mold (3), pressing to stop the surplus portion of the veneer paper (P ″) so as not to move. Material (14) (14)
(Indicated by a chain double-dashed line).

Furthermore, in order to remove the surplus portion of the single board (P) after the semi-punching part (P1) is punched out, an appropriate surplus paper removing mechanism is required. A conventionally known one that is blown off by a blower, or bounced off by a kicker or the like may be installed at a predetermined place.

Next, in FIG. 2, the air cylinder (8) is driven in reverse to retract the rod (10a), and the slide base (9) is moved to the other paper feed position (X2) side. As a result, the female die (3) moves to the intersecting portion (N) while the paper piece (P3) is loaded in the forming portion (31), and the female die (3 ') moves into the paper storage hopper (2'). Move directly below the opening (2a ').

At the intersection (N), the air cylinder (10) is driven, the rod (10a) is advanced and the moving female mold (3) is advanced upward, and the drive mechanism (12) is driven to drive the male mold. (7) is extruded to the female mold (3) side. And female mold (3)
While the upper surface of the foam sheet is in contact with the foamed sheet (S), a predetermined part of the foamed sheet (S) is pushed into the molding part (31) of the female mold (3) to form the molding part (31) and the paper piece (P3). To form a basin shape (see Fig. 5).

On the other hand, the female die (3 ') moved just below the opening (2a') of the paper storage hopper (2 ') (shown by a chain double-dashed line in FIG. 2).
Is located at the corresponding paper feed position (X2), and at that paper feed position (X2) has a semi-punched portion (P1) (developed paper piece) that has been precut to the developed shape. At least the half punched portion (P1) of (P) is supplied.

Therefore, after the above steps, the reciprocating driving means (the base (6), the air cylinder (8), the slide (9), etc.) moves the female dies (3) and (3 ') in the other direction (second). When driven in the left direction in the figure, the female die (3) is located at the corresponding paper feed position (X2), and the female die (3 ') is located at the intersection (N). Become.

Thus, the two female molds (3) and (3 ') reciprocate together with the corresponding sheet feeding positions (X1) and (X2) and the intersection (N) in the state of being out of phase with each other. The molding step and the molding step can be carried out simultaneously in one and the other female molds (3) and (3 '), respectively.

Next, after the air cylinder (10) and the drive mechanism (12) are driven in reverse to separate the female mold (3) and the male mold (7) from each other, as shown in FIG. The chain conveyor (20) of the line (1) is driven to move the integrally molded product (B) of the paper piece (P3) and the foam sheet (S) obtained as described above with a predetermined stroke. At this time, the unprocessed part of the foamed sheet (S) is newly supplied to the intersecting part (N).

The trimming means (1 adjacent to the intersection (N)
According to 6), the molded product (B) is punched out, trimmed, and then recovered, and a paper piece (P3) is attached to the side wall and bottom of the container body (A1) formed of the foam sheet (S).
It is possible to obtain a composite container (A) in which the
See figure).

Thus, in the female mold (3), the slide (9) is removed because the paper piece (P3) loaded in the molding part (31) is removed.
The next movement of the sheet to the sheet feeding position (X1) causes the sheet to be positioned immediately below the opening (2a) of the sheet storage hopper (2) and wait for loading the next new sheet (P3).

On the other hand, the female die (3 ') is moved to the paper feed position (X1) of the slide base (9) with the paper piece (P3) newly loaded in the molding part (31'). Thus, the vehicle is positioned at the intersection (N) and stands by to perform the above-mentioned predetermined molding process.

By repeating the above operations and steps, the composite container (A) can be manufactured continuously and efficiently (see FIG. 6).

In the composite container (A) obtained as described above, the paper piece (P3) is laminated simultaneously with the molding of the foamed sheet (S), so that the outer surface of the paper piece (P3) is flush with the surface of the container body (A1), There is no step due to the piece of paper (P3), it gives a good sense of unity, and the appearance is beautiful.

In addition, the container body (A1) can exhibit the same good heat insulating properties and moldability as the conventional foam sheet container, and the paper piece (P3) allows the conventional paper container to have:
Good printability, breakage resistance, heat resistance, etc. can be exhibited, and excellent use effects not found in conventional foam sheet containers and paper containers can be exhibited.

Moreover, since the container body (A1) and the paper piece (P3) are completely intimately bonded, the joint strength is much higher than when the paper is laminated afterwards, and the durability during use Will also be excellent. Moreover, it is possible to achieve the ease of manufacturing the composite container (A).

Furthermore, in the molding apparatus of this embodiment, the female molds (3) and (3 ') correspond to the paper feed positions (X1) (X2).
By reciprocating together with a half phase difference between the and the crossing portion (N), it is possible to simultaneously perform the paper feeding step and the molding step in the one and the other female molds (3) and (3 '), respectively. Because I can do it, I have little idle time, only 2
The composite container can be efficiently formed by the single female mold (3) and the single male mold (7). Therefore, there is an advantage that the manufacturing cost of the composite container can be significantly reduced.

The foam sheet (S) as the material of the container body (A1)
Other than expanded polystyrene sheet, copolymers of polystyrene and other resins, high impact polystyrene, polypropylene, polyethylene, polyvinyl chloride, poly MMA
As with conventional packaging containers, foamed sheets of various thermoplastic resins can be used, and non-foamed sheets may be used as necessary.

The outer shape of the container main body (A1) can be implemented in various container shapes such as a hexagonal shape in addition to the rectangular deep plate shape shown in the figure. It is particularly preferably used as a molding device for a composite container (A) having a relatively flat shape with a large bottom area.

On the other hand, as the veneer paper (P), various types of paper such as kraft paper, which are used for ordinary packaging materials, can be used. In any case, one side of the veneer paper (P) is coated with an adhesive. It is preferable to set it from the viewpoint of enhancing the integrity with the container body (A1). As the above-mentioned adhesive, a thermo-adhesive adhesive that exerts an adhesive action by heat during molding is suitable, but in addition to this,
It is also possible to use a pressure-sensitive type adhesive that exerts an adhesive action depending on the pressure applied during molding, or another adhesive.

Further, a bent groove such as a concave groove or a sewing groove may be formed in the bent portion of the single board (P), and in this case, the bending can be performed more accurately and easily.

FIG. 7 shows another embodiment of the paper supply means. In this paper feeding means, compared to the paper feeding means shown in FIG. 2, the suction part, the vacuum suction member, the air cylinder and the like equipped in the female mold are omitted, while the paper feeding means is arranged on the side of the base (6). A transport pad (51) reciprocally movable between the upper position of the table (50) for feeding the single board (P) and the upper position of the female die (3) which has moved to a predetermined paper feeding position. It is different in that it is equipped with.

A large number of single paperboards (P) are stacked on the table (50), and the transfer pad (51) has a vacuum suction member (6).
0) and the vacuum suction member (60) to the transfer pad (5
It is equipped with an air cylinder (not shown) that drives it so that it can advance from the lower surface of 1) to the single paperboard (P) side. A suction cup-shaped suction part (52) is attached to the lower end of the vacuum suction member (60).

In this paper supply means, first, the end board paper (P) is picked up by the vacuum suction member (60) from the table (50), and the semi-punched part (P1) of the end board paper (P) is sucked by the suction part (52). While holding it, move it to the paper feed position (X1) and wait there.

Next, when the female die (3) moves to the paper feeding position (X1), the vacuum suction member (60) is lowered to produce the single board (P).
On the female mold (3). Then, the vacuum suction member (60) is further lowered to separate the half punched portion (P1) of the single board (P) and its surplus portion, and only the half punched portion (P1) is used as a paper piece (P3) for the female die (P3). 3) It is pushed into the inside of the female mold (3), and the peripheral portion of the female mold (3) is bent.

Next, the suction of the suction part (52) is released, and the vacuum suction member (6
0) is raised.

On the other hand, the female die (3) supplied with the paper piece (P3) moves to the intersection (N) (see FIG. 2) and functions according to the above predetermined process.

Then, the lifted vacuum suction member (60) is returned to the table (50) by the transfer pad (51) and stands by to pick up the new single board (P).

The molding apparatus for a composite container according to the present invention is not limited to the above embodiment, and any one of the above-mentioned sheet feeding positions (X1) (X2) and female molds (3) (3 ') may be used depending on the case. Omitted. According to this, there is an advantage that the molding apparatus can be made compact.

Further, further, the sheet supply line (1) is constituted by a roller conveyor, and the male die (7) is provided with an air injection port so as to use pressure molding at the time of molding the foamed sheet (S). Various design changes can be made without changing the gist of the present invention, such as providing a vacuum suction port in the female mold (3) for use in combination and forming the male mold (7) with a flat plate.

<Effects of the Invention> As described above, according to the molding apparatus for a composite container of the present invention, since the paper is laminated simultaneously with the molding of the container body, the two are completely adhered to each other, resulting in strong bonding strength and use. It is possible to mold a container having excellent durability against time. Moreover, there is no step on the outer circumference due to the paper, a good sense of unity is provided, and the appearance is also suitable, and the paper on the surface can exhibit good printability, breakage resistance, heat resistance, etc. Obtainable.

Further, in the molding apparatus of the present invention, both female molds reciprocate together between the corresponding paper feeding positions and the intersecting portions with a half phase shift, thereby performing one and the other of the paper feeding process and the molding process, respectively. Since it can be done at the same time in the female type, the idle time is short and only 2
The composite container can be efficiently molded by using one female mold and one molding means. Therefore, there is an advantage that the manufacturing cost of the composite container can be significantly reduced.

Further, it is easier to manufacture than the case where the papers are laminated after the fact, and it is possible to achieve various excellent effects such as reduction of the manufacturing cost of the composite container.

[Brief description of drawings]

1 is a schematic plan view showing a molding apparatus for a composite container according to the present invention, FIG. 2 is a side view of a paper feed line of the molding apparatus shown in FIG. 1, and FIG. 3 is a side view for a molding apparatus for a composite container. FIG. 4 is a cross-sectional view of an essential part showing a state in which paper is loaded, FIG. 5 is a cross-sectional view of an essential part showing a molding process, FIG. 6 is a perspective view of a composite container, and FIG. 7 is another embodiment of paper supply means. Explanatory drawing which shows an example. (L1) …… Paper feeding line (L2) …… Sheet feeding line (2) (2 ′) …… Paper storage hopper (3) (3 ′) …… Female type, (4) (4 ′) …… Paper feeding means (5) …… heating furnace, (7) …… male type (P) …… single board, (P1) …… semi-punched part (S) …… foamed sheet, (N) …… intersection

Claims (2)

[Claims] 1. A device for molding a composite container in which paper pieces are laminated on the outer surface of a container body made of a thermoplastic resin sheet, wherein the thermoplastic resin sheet is intermittently run in one direction. Means, heating means for heating and softening the thermoplastic sheet supplied by the sheet supply means, intersections intersecting the sheet supply means on the downstream side of the heating means, and both sides of the sheet supply means sandwiching the intersections. A paper feed line having a pair of paper feed positions arranged at equal distances, one female die to which a developed piece of paper is fed at one paper feed position of the paper feed line, and the other of the paper feed line At the paper feed position, when one female die is positioned at the corresponding paper feed position and the other female die to which the developed paper piece is fed, the other female die is positioned at the intersection. In while holding both female and reciprocating driving means for reciprocally driven together along both female in the sheet feeding line, in both the female is located on the corresponding feeding position,
Paper supply means for supplying the corresponding developed paper pieces in the female mold and female molds provided above the intersecting portion and supplied with the developed paper pieces are located at the intersecting portions. At this time, the thermoplastic sheet heated and softened by the heating means is pushed into the female mold to form a predetermined shape, and at the same time, the paper piece supplied to the female mold side and the thermoplastic sheet are joined and integrated. An apparatus for molding a composite container, comprising: a molding means for turning into a material, and a trimming means for trimming an integrally molded product of the paper piece and the thermoplastic resin sheet. 2. The apparatus for molding a composite container according to claim 1, wherein the paper supply means supplies the paper piece to the female mold by vacuum suction.