JPS6228732B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a rim winding device for containers made of foamed sheets, and an object thereof is to provide a device that has good processing efficiency and can provide a high-quality finish.

Traditionally, paper cup containers have been subjected to so-called lip-curl processing, in which the lip is rolled up to form rounded curled ribs. As a result, the mouth edge is reinforced and the mouthfeel is improved when used as a beverage container, which is said to be hygienic. However, in recent years, cup-shaped molded containers made of foamed polystyrene sheets, which have superior heat and cold retention properties compared to the above-mentioned paper containers, have come into use, but in the case of these foamed-sheet containers, the above-mentioned rip-curl process is extremely difficult. It is said that

For this reason, a method and apparatus (for example, see Japanese Patent Publication No. 38-24594, Japanese Patent Publication No. 39-2082, etc.) that performs lip curling by pushing a synthetic resin container into a heated mold while rotating it can be used for foam sheet containers. Attempts were made to apply this technique to the process, but it was difficult to form perfectly shaped lips, and the finished product was not satisfactory.

In other words, foamed sheet molded products have little elongation in the circumferential direction of the container due to the directionality of the sheet itself caused by stretching during sheet molding, and since foamed sheets have heat insulating properties, they can be used in a short period of time. It is difficult to heat it to a suitable softening temperature, and therefore it is easy to crack or tear during winding, resulting in very poor winding properties and a poor finish, making it difficult to wind evenly around the entire circumference of the mouth edge. This has disadvantages such as unevenness and poor dimensional accuracy of the product.Especially when fitting a lid formed separately from the container to the rim to make it possible to cover the rim, the accuracy of the rim may be difficult. Since dimensional accuracy is required, conventional foam sheet containers cannot be used.

Therefore, the present invention provides an apparatus that can easily and efficiently wrap the mouth edge of the foamed sheet container, and its configuration includes a supply section and a container supply section. In addition to the winding part of the mouth edge part being arranged side by side, a movable table is installed below between the supply part and the winding part, and a winding groove is formed on the movable table. A curling mold is provided, and the winding groove can be heated.A plug mold that can be fitted into the inner surface of the container is rotatably provided in the center of the curling mold, and a vacuum suction hole is provided on the surface of the plug mold. A container feeding mechanism is provided above the feeding section to feed the containers one by one onto the plug mold, and a cavity mold into which the outer surface of the container can be inserted is provided above the winding section so as to be movable up and down and rotatable. A vacuum suction hole is provided on the inner surface of the cavity mold, and a vacuum suction hole is provided on the movable table at a position where it can come into contact with the side wall of the container.
It is characterized in that a winding base point forming member such as a cutter knife is provided on the outer periphery of the side wall to form a winding base point part such as a notch that is easier to bend than other parts.

Next, embodiments of the present invention will be illustrated below with reference to the drawings.

In the case of the illustrated device, there is one supply section A in the center.
At the same time, winding sections B, B' and collecting sections C, C' are arranged symmetrically on the left and right sides of the supply section A, respectively, and are sequentially arranged in parallel on a straight line. Reference numeral 5 denotes a moving table provided below each part so as to be movable along the direction in which each part is arranged in parallel, and 50 is a cylinder mechanism for movement.

On the movable table 5, two sets of left and right are installed: a curling mold 4 having a winding groove 40 on its upper surface, and a plug mold 2, which is provided at the center of the curling mold 4 so as to be able to rise and fall and rotate freely, and which can be fitted into the inner surface of the container. . As the movable table 5 moves, one set of the curling mold 4 and the plug mold 2 reciprocates between the supply section A and the winding section B on the right side, and the other set of the curling mold 4 and the plug mold 2 is adapted to reciprocate between the supply section A and the winding section B' on the left side.

The area around the winding groove 40 of the curling mold 4 is the heater 4.
The curling mold 4 can be heated on the movable table 5 with a heat insulating member 43 between the curling mold 4 and the movable table 5.
It is fixed at 41 is a supply hole for lubricant, etc.;
An opening is provided on the inner surface of the winding groove 40 so that a lubricant such as silicone water can be supplied into the winding groove 40 through the inside of the curling mold 4. While passing through, it is heated and supplied to the winding groove 40 in a high temperature or vaporized state.

Next, the plug mold 2 has a lower plug shaft 20 that passes through the central cavity of the curling mold 4 and is rotatably fitted into the movable table 5 below, and the plug shaft 20 protrudes toward the lower part of the movable table 5. A pinion gear 21 is attached to the cylinder 23, and a rack 22 that meshes with the pinion gear 21 is connected to the cylinder 23.
etc., so as to be movable in a direction parallel to the moving table 5. Therefore, by relatively moving the rack 22, the moving table 5, and the plug shaft 20 in parallel, the pinion gear 21 is rotated, and the plug mold 2 integrated with the pinion gear 21 can be rotated. .

Further, the lower end of the plug shaft 20 is placed in contact with a base 24, and the plug mold 2 is placed in a curling mold 4.
It is now raised slightly upwards.
25 is a winding part B of the base 24;
It is a fitting hole provided at a position corresponding to the center of B′,
Reference numeral 26 denotes an elevating plate that can be raised and lowered from the lower part to the upper surface within the fitting hole 25. When the lower end of the plug shaft 20 has moved to the position of the above-mentioned fitting hole 25, the elevating plate 2
By raising and lowering the plug shaft 6, the plug shaft 20 and the upper plug mold 2 can be raised and lowered.

Further, a vacuum suction hole 27 is opened on the top surface of the plug mold 2, etc., so that the container 1 can be suctioned and fixed. The other end of the suction hole 27 passes through the lower plug shaft 20 and opens on the outer circumferential surface of the movable table 5, and is connected to an external vacuum pipe 52 through a circumferential groove 51 formed on the movable table 5 side. is connected to. Therefore, even if the plug mold 2 and the plug shaft 20 freely rotate or move up and down, the suction hole 27 always communicates with the vacuum pipe 52 so that the container can be suctioned and fixed.

Next, a mandrel mold 6 is provided on the outside of each of the left and right curling molds 4 and plug molds 2 arranged side by side on the moving table 5.
60 is an opening on the top surface of the mandrel mold 6, and is used to move the container from the winding sections B and B' to the collection sections C and C'. This is an air outlet.

Furthermore, 7 and 7 are cutter knives provided in the movement path of the plug mold 2 and the curling mold 4 from the supply section A to the winding processing sections B and B'. The notch can be formed by coming into contact with the side wall near the section.

Next, above the supply section A, 8 is a spiral feeder serving as a container supply mechanism, and as the feeder 8 rotates, containers can be dropped and supplied above the plug mold 2 one by one.

Moreover, a cavity mold 3 is provided above the winding parts B and B' so that it can be raised and lowered by a cylinder 30, etc., and a vacuum suction hole 31 is also opened in the upper part of the inner surface of this cavity mold 3 to hold the container. It is designed so that it can be inserted and held by suction. Note that the cavity mold 3 is rotatably supported by a cylinder 30.

Further, a suction shooter 9 is provided above the collection sections C and C', and the container after the winding process is sucked upward and collected.

The operation of the mouth rim winding device as described above will be sequentially explained.

First, the material of the foamed sheet container 1 to be processed by the device of the present invention may be, for example, a foamed polystyrene sheet with an expansion ratio of 1.5 to 13 times, a foamed sheet of various other thermoplastic resins, or one or both sides of the foamed sheet. For example, one or more laminated non-foamed films made of high-impact polystyrene, uniaxially or biaxially oriented polystyrene, polypropylene, polyethylene, or other resins are used. The thickness of the above foam sheet used is 0.5 to 2.5 mm (product thickness), and the thickness of the non-foamed film to be laminated is 8 to 80 mm.
μ (product thickness) is used.

Then, the foamed sheet is expanded into a container shape such as a cup shape or a bowl shape using vacuum molding or other so-called sheet molding methods to form the desired container 1. In practice, the ratio of the diameter width D to the height H of the container 1 is about H/D=0.4 to 1.2.

By the above-mentioned molding, a flurry-shaped opening edge 10 is formed at the upper end of the container 1 and is curved outward in a hook shape. The shape of the mouth rim 10 can be various depending on the winding properties during the winding process described later and the shape of the wound rim to be formed. It is preferable to form a relatively short hanging edge 11 at the outer peripheral end in terms of processing and finish quality.

The width of the hook-shaped flange-like mouth edge 10 as in the above embodiment varies depending on the size of the container, but for example, the width of the mouth edge 10 is 1.5 to 6.0 mm.
In this case, the height of the hanging edge 11 on the outer periphery is 1.0 to 2.0 mm.
If the hanging edge 11 is too long, the finished shape after winding will be poor.

Further, the entire side wall of the container is formed in a tapered shape that widens from the bottom toward the upper opening side, but only a suitable length below the mouth edge 10 is formed as a vertical wall portion 12 without a taper. The length of this vertical wall portion 12 may be at least slightly below a winding base point portion to be described later, and is usually formed to have a length of about 2.5 to 11.0 mm.

Material container 1 pre-formed in the above shape
is set in the spiral feeder 8 of the supply section A.

Then, move the moving table 5 so that either the left or right plug mold 2 (the right side in FIG. 1) is located below the supply section A, and rotate the spiral feeder 8 appropriately to place one container 1 onto the plug mold 2. Supplied with a drop to be mated to. Container 1 fitted to plug type 2
is vacuum suctioned and fixed in the vacuum suction hole 27. However, since the lower end of the plug shaft 20 is placed on the base 24 at this time, the plug mold 2 is slightly raised above the curling mold 4, and the mouth edge 10 of the container 1 is curled. It is fixed in a state where it is just fitted into the winding groove 40 of the mold 4.

Note that the winding groove 40 of the curling die 4 has a
Add a small amount (0.2
cc or less) so that the lubricant enters the gap between the winding groove 40 and the edge 10, and the winding groove 40 is heated to heat the edge 10 to a predetermined temperature.

Next, move the moving table 5 to winding section B.
Move the plug mold 2 and container 1 below. At this time, since the pinion gear 21 attached to the lower part of the plug shaft 20 is engaged with the rack 22, the plug mold 2 and the container 1 rotate with the movement. Then, when the container 1 rotates once or more while the cutter knife 7 provided in the moving path comes into contact with the side wall of the container 1, a notch 13, which will be described later as a winding base point, is cut and formed around the entire circumference of the side wall. (See Figure 4).

When the plug mold 2 moves directly below the cavity mold 3 in the winding section B, the cavity mold 3 descends and covers the outer surface of the container 1, and is fixed by suction with the vacuum suction hole 31, so that the container 1 is It is sandwiched between the plug mold 2 and the cavity mold 3 and fixed together. At this time, the tip end side of the mouth edge 10 from the vicinity of the notch 13 where the winding process is performed on the container 1 is exposed below the plug mold 2 and the cavity mold 3.

In addition, up to this stage, the vicinity of the mouth edge 10 is heated to a predetermined temperature at which winding is possible, but especially the parts that require large deformation during winding, such as the notch
It is preferable to heat the nearby side wall portion or the root portion of the hanging edge 11 at the tip of the mouth rim 10 intensively, and the heating time will vary depending on the material and wall thickness of the container 1. Note that the foamed sheet material is largely stretched in the vertical direction during molding, so when the edge portion 10 is heated, a force that tends to shrink the foamed sheet in the vertical direction acts on the foamed sheet, causing the cut portions 13 to expand. A V-shaped groove will be formed (see Figure 5).

At the stage of the above process, the plug mold 2 on the other side is located below the supply part A, so
One container 1 is supplied from the feeder 8 to the plug mold 2. Therefore, the container 1 supplied to the plug mold 2 on the other side is also sequentially subjected to the same winding process at the winding part B' side, one step later than the winding part B side. However, since the explanation would be redundant, a detailed explanation will be omitted.

Next, the opening edge portion 10 is wound. First, the rack 22 is moved in parallel to rotate the pinion gear 21 and the plug mold 2. Then, the container 1 is fixed integrally with the plug mold 2.
and the cavity mold 3 also rotate at the same time.

In this state, by lowering the cavity mold 3 and simultaneously lowering the elevating plate 26, the plug shaft 20 and the plug mold 2 on the elevating plate 26 are lowered.

Therefore, the container 1 is pressed vertically from above toward the winding groove 40 along the side wall while rotating, but the notch 13 in the middle of the vertical wall 12 is weaker than other parts and bends. First, the container 1 is removed from the cut 13 along the winding groove 40.
It deforms greatly by curving outward. Then, starting from the notch 13 as a starting point, the mouth edge 10 on the tip side is also deformed so as to be wound outward of the container 1 along the winding groove 40. Note that the notch 13 had expanded into a V-shape before deformation, but due to the winding deformation in the above-mentioned winding process, the notch 13 is again closed in a linear shape. (See Figure 6).

When the cavity mold 3 and the plug mold 2 are further lowered and pressed until they come into contact with the curling mold 4, the tip of the mouth rim 10 comes into contact with the lower surface of the cavity mold 3 and is bent approximately horizontally, so that the mouth rim 10 Completely rolled (see Figure 7). At this time, it is most preferable in terms of appearance and strength to wind the opening so that the tip of the opening rim 10 just contacts the side wall of the container 1, but in practice, there is a slight gap between the tip of the opening rim 10 and the side wall. There is no problem even if there is a gap (see FIG. 9), and it can also be used in a state where the tip of the mouth edge 10 is further rolled up above the side wall.

When the winding process is completed as described above, the cavity mold 3 and the plug mold 2 rise to release the pressure, and the cavity mold 3 returns upward.
At this time, by releasing the vacuum suction of the plug mold 2, the container 1 is lifted upward and held while being fitted into the cavity mold 3.

Next, the moving table 5 moves so that the plug mold 2 and the like are located below the supply section A, and the mandrel mold 6 is located below the winding section B. When the movable table 5 returns to its original state, the adsorption of the cavity mold 3 is released. Then, the container 1 is dropped and fitted into the mandrel mold 6.

At this time, the plug mold 2 and the like fitted with the container 1 are positioned below the winding section B' on the other side, and the cavity mold 3 is lowered to perform the same winding process as described above.

After the winding in the winding section B' on the other side is completed and the cavity mold 3 is raised, the movable table 5 is moved again and the mandrel mold 6 with the container 1 fitted is placed below the collection section C. position.

Next, the container 1 is sucked upward by the shooter 9, and at the same time, air is blown upward from the air blowing hole 60 of the mandrel mold 6 to assist in recovery of the container 1. Then, when the container 1 is transported to an appropriate collection point by the shooter 9, the entire winding process for one container 1 is completed.

In addition, at this stage, the winding processing section B is in the process of winding another container 1, and the supply section A is in the stage of dropping and feeding the container 1 to the plug mold 2 on the other side. In the winding section B' on the other side, the container 1 is at the stage of being dropped from the cavity mold 3 to the mandrel mold 6, and by further operating the device, the process described above is successively performed. Each container 1 is then wound. Therefore, in supply section A, container 1 is
By individually supplying the containers 1 to the left and right plug molds 2, the sequentially wound containers 1 are collected alternately into the shooters 9 of the left and right collection sections C and C'.

Among the above devices, the feeding mechanism for the container 1 is as follows:
In addition to the spiral feeder 8, various conveyor mechanisms, conveyance mechanisms using vacuum suction, and other devices that can feed and fit each container 1 to the plug mold 2 can be freely modified and implemented.

The rotation and elevating mechanism of the plug type 2 can be modified as appropriate by combining known mechanisms such as a servo motor and a cylinder mechanism.

It can also be carried out even if there is no elevating mechanism for the plug mold 2. In this case, before the winding process, the plug mold 2 is not placed in close contact with the inner surface of the container 1, but is set with a gap in the vertical direction. Cavity type 3
The container 1 may be tightly fitted into the plug mold 2 while the opening edge portion 10 is being rolled up at the same time as the container 1 is lowered.

Next, as a heating mechanism for the curling die 4, an electric heater 42 is wound around the outer periphery of the die to heat the entire curling die 4. Efficient heating can be achieved by embedding a heater in 4, and various heating methods such as high frequency heating or using a high temperature heat medium can be employed.

In addition, the supply of lubricant reduces the friction between the rotating container mouth edge 10 and the winding groove 40 during winding process, making the process easier, and also reduces the gap between the winding groove 40 and the mouth edge 10. By filling the lubricant or the steam generated when the lubricant is heated, it serves as a heat transfer medium that efficiently transfers heat from the winding groove 40 to the edge 10, and the dimensions of the edge 10 are Although it is preferable that even a container 1 having not very high precision can be processed without any trouble, silicone or other material with good lubricity is used as a component of the lubricant.
It is preferable for the heating effect to heat the lubricant to a high temperature before supplying it to the winding groove 40.
Further, the supply position of the lubricant can be changed as appropriate depending on the manner of use, such as near the inner upper end of the winding groove 40 or the lower surface.

In addition, instead of the above-mentioned lubricant, the supply hole 41 for lubricant etc.
Even if steam or hot air is simply sent into the opening, there is an effect of improving the heat conductivity or heating efficiency for the mouth edge 10.

Next, the notch 13 formed on the side wall of the container 1 is
This serves as the starting point for winding the mouth edge 10 during winding, and the thin blade cutter knife 7 is used to cut the mouth edge 1.
A line is formed on the outer periphery of the side wall slightly below 0 to the middle of the wall thickness (the depth is approximately 1/3 to 4/5 of the wall thickness, preferably 2/5 to 2/3). However, the formation position of this notch portion 13 is at the mouth edge portion 10.
It is formed at the location that becomes the winding base point that requires the largest deformation when wound, that is, at the upper end on the inner circumference side of the mouth edge after winding. It varies depending on the winding shape etc.
In the illustrated embodiment, the cutter knife 7 is brought into contact with the side wall located slightly below the hanging edge 11 at the tip of the mouth edge 10, and the cutter knife 7
3 is formed.

In addition to the thin-blade cutter knife 7 described above, other members for forming the winding base point include cutters for cutting V-shaped and other circumferential grooves, heat cutters for forming rectangular and other circumferential groove-like recesses by heat melting, and side wall pressing cutters. Even if a pushing member or the like is provided to form a circumferential groove-like recessed portion, it is possible to form a winding base portion that is easier to bend than other portions, similar to the notch portion 13 described above. Furthermore, in addition to the cutter knife 7 or the like that continuously forms the notches 13 etc. around the entire circumference of the container, if a cutter knife etc. in which the blades are formed intermittently like a perforated blade is used, the notches 13 etc. can be formed in a perforated shape. It is also possible to form it intermittently, such as.

In the illustrated embodiment, the cut portion 13 is formed by fixing the cutter knife 7 and rotating the container 1 side while moving it, but when the container 1 is in the supply section A, it is A winding base point forming member such as a cutter knife 7 which is rotatable along the outer periphery of the container 1 is installed so that the cutter knife 7 or the like can move around the container 1 to form the cut portion 13 or the like. It's okay.

Next, as a method for recovering the processed container 1, as in the illustrated embodiment, the container 1 is wound from the processing sections B and B' to the recovery sections C and C' using a mandrel mold 6 provided on the moving table 5. In addition to transporting the container 1 to a conveyor or other mechanism and collecting it by sucking it up with the shooter 9, it is also possible to take out the container 1 directly from the cavity mold 3 of the winding sections B and B' and collect it using a conveyor or other mechanism. The mandrel mold 6 and the shooters 9 of the recovery sections C and C' become unnecessary.

Further, in place of the shooter 9, the collection sections C and C' may be provided with a conveyance mechanism for the containers 1, which is a combination of various known crank mechanisms and conveyor mechanisms.
Furthermore, the mandrel mold 6 has an air blowing hole 60.
Alternatively, an eject pin that can freely protrude upward may be provided to send the container 1 to the shooter 9 side.

As for the overall structure of the device, as in the embodiment, two winding sections B and B', etc. are arranged side by side on the left and right sides of one supply section A in the center, and the containers 1 are alternately supplied. This makes it possible to carry out efficient processing and the device itself is compact, which is suitable.Also, since the device with the above configuration can be accommodated in a narrow width, it becomes easier to cope with mass production by arranging a plurality of devices in parallel in the width direction. However, it is of course also possible to provide one supply section A and one winding section B;
The arrangement can be changed freely.

According to the apparatus of the present invention configured as described above, the plug-type container 2 can be used in contrast to the foam sheet container 1, which was conventionally considered to be extremely difficult to wind due to the axial stretching. Before transferring the fitted containers 1 to the winding processing section B, a winding base point such as a notch 13 which is easier to bend than other parts is formed on the entire circumference of the side wall by a winding base point forming member such as a cutter knife 7. Since the winding part 10 can be formed very smoothly in the winding part B, the curved part is constant.
There are no defects such as cracks or tears in the material sheet as in the past, and there are no wrinkles in the finished product or local variations in the winding state. In addition, the dimensional accuracy of the winding edge 10 after processing is stable and accurate, so when a separately formed lid is used to fit into the edge 10, particularly accurate fitting can be achieved. suitable.

Further, after the container 1 is fitted into the plug mold 2, the mouth edge 10 is connected to the heated winding groove 4 of the curling mold 4.
Since the wire is transferred from the supply section A to the winding section B in the fully inserted state, it is heated to a predetermined processing temperature during that time, eliminating the need for extra heating time and allowing for more efficient processing. realizable.

Although the processed container is made of a foam sheet, it has a good rolled edge and is suitable for a variety of uses, such as for improving the taste and hygiene when used as a beverage container. In addition to having great advantages in use, the formation of the winding opening edge has a very large reinforcing effect, and is effective in improving the rigidity or strength of the container 1 as a whole.

Regarding the reinforcing effect of the mouth rim 10, strength tests were conducted on the mouth rim 10 of an example product whose mouth rim 10 was wound using the device of the present invention and a comparative product before the winding process. As is clear from the figure, the strength improvement achieved by the winding device of the present invention was demonstrated.

That is, the test method was to apply a lateral compressive load to the mouth edge to produce a strain of 18 mm, and then measure the repulsive force. Several types of containers were tested with the same shape but different weights (the weights differ depending on the expansion ratio and sheet thickness), and the approximate dimensions of the containers were determined by the rim of the container before winding. Outer diameter is 81
mmφ, height 91mm, width of flange-like mouth edge 10 3.5
mm, the height of the hanging edge 11 is 2.0 mm, the length of the vertical wall 12 is 12 mm, and the sheet thickness at the vertical wall 12 is 1.6 mm. The width of the mouth edge 10 is 3.5 mm,
The height is 3.5 mm, and the length of the vertical wall portion 12 is 8.5 mm.
I became mm.

From the above test results, for example, when using containers of the same strength, products processed by winding using the device of this invention can be approximately 0.5g lighter per container than containers that are not wound. This proved to be economical in terms of manufacturing and transportation costs.

[Brief explanation of the drawing]

The drawings illustrate an embodiment of the present invention, and Fig. 1 is a structural diagram of the entire device, Fig. 2 is a half-sectional view of the container before processing, Fig. 3 is an enlarged sectional view of the main part, and Fig. 4 - Figure 7 is an enlarged sectional view of the main part showing the operating process of sequential winding processing, Figure 8 is a half sectional view of the container after processing, Figure 9 is an enlarged sectional view of the main part, and Fig. 10 is the strength test result. FIG. 1... Container, 10... Mouth edge, 13... Notch, 2... Plug type, 3... Cavity type, 4
... Curling mold, 40 ... Winding groove, 5 ... Moving table, 6 ... Mandrel type, 7 ... Cutter knife, 8 ... Spiral feeder, 9 ... Suction shooter, A ... Supply section, B , B'... Winding processing section, C, C'... Collection section.

Claims (1)

[Scope of Claims] 1. A container supply section and a mouth edge winding section are arranged side by side, and a movable table is provided below between the supply section and the winding section, and is movable. A curling mold with a winding groove formed thereon is provided on the table, and the said winding groove can be heated.A plug mold that can be inserted into the inner surface of the container is rotatably provided in the center of the curling mold, and the plug mold surface is equipped with a vacuum suction hole, and above the supply section is a container supply mechanism that can feed containers one by one onto the plug mold.Above the winding section is a cavity into which the outer surface of the container can be inserted. The mold is movable up and down and rotatable, and vacuum suction holes are provided on the inner surface of the cavity mold.Furthermore, on the movable table, at a position where it can come into contact with the side wall of the container, there is a notch on the outer periphery of the side wall that is easier to bend than other parts. 1. An apparatus for winding a rim of a foam sheet container, characterized in that a winding base forming member such as a cutter knife is provided to form a winding base. 2 Two winding sections are arranged symmetrically on the left and right sides of one supply section, and on the movable table there are two winding sections that can be moved alternately between the central supply section and the left and right winding sections.
2. The device for winding the rim of a foam sheet container according to claim 1, comprising a set of curling molds and plug molds. 3. A mandrel mold that can be fitted into the inner surface of the container is provided adjacent to the curling mold and plug mold on the movable table, and the mandrel mold moves from the winding section to the container recovery section outside the winding section as the movable table moves. A rim winding device for a foam sheet container according to claim 1, wherein the rim winding device is movable between the foam sheet containers. 4. The rim winding device for a foam sheet container according to claim 3, wherein a suction shooter for container recovery is provided above the container recovery section, and an air blowing hole is provided on the upper surface of the mandrel mold. 5. The rim winding device for a foam sheet container according to claim 1, wherein a supply hole for a lubricant or the like is provided on the inner surface of the winding groove provided in the curling mold. 6. Claim 1 above, in which a spiral feeder is provided as the container feeding mechanism above the feeding section.
A rim winding device for a foam sheet container as described in 2.