JPH08132520A - Manufacture of in-mold label container made of thermoplastic resin and device therefor - Google Patents

Abstract

PURPOSE: To simplify a manufacturing process, simplify and miniaturize a device, reduce the cost, improve productivity, and manufacture an in-mold label container at a low cost. CONSTITUTION: By rotating a label inserting means 90 with the center at the same axis as an axis of a rotary mold drum 20 at the same angular velocity and in the same direction, a label is inserted into a cavity 21. Thereafter, the label inserting means 90 is rotated with the center at the same axis as that of the rotary mold drum 20 in the reverse direction so as to return to an original position, and a thermoplastic resin body to be molded 11 is shaped by a shaping means 40 so as to manufacture an in-mold label container.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for manufacturing a thermoplastic resin in-mold label container for manufacturing an in-mold label container by thermoforming using a thermoplastic resin molding target. It can be used when thermoforming is performed using a rotary mold drum (rotary mold) such as a rectangular cylinder.

[0002]

BACKGROUND ART In recent years, in packaging containers for various products, particularly plastic containers for packaging food, etc., in order to make the appearance of the container cosmetic for the purpose of differentiation, or to display information on the contents and usage. A high degree of printing is required on the outside of the container for more detailed display. In response to such demands, currently, curved surface printing or a method of attaching a printed label to the outside of the container is adopted. In addition, it is required to use a label made of the same material as the container so that the container and the label are made of a single material because of problems in waste disposal. In response to such a demand for single material,
BACKGROUND ART In-mold label containers obtained by mounting a label during molding of the container are manufactured. As a method of manufacturing this in-mold label container, there are a method by injection molding, a method by thermoforming using a sheet, and the like. In these methods, a label is inserted into a mold cavity before molding, and the container and the label are integrated by molding.

[0003]

However, in the above-described method for producing an in-mold label container by injection molding, the productivity is low because of the injection molding, and there is a limit to the thinning of the container. Further, in the method of manufacturing an in-mold label container by thermoforming using a sheet, when a multi-row mold is used, the label mounting mechanism becomes large and the equipment cost increases, and a single-row or other small-row mold is used. In that case, there is a problem that productivity is lowered. Even if a mechanism for reciprocating the mold is provided to solve this problem, there is a problem that the equipment becomes complicated and expensive. Furthermore, in the method of sticking the curved label or the printed label to the outside of the container, the method of manufacturing an in-mold label container in which molding and label mounting are performed in one step,
A curved surface printing process and a label mounting process must be provided separately from the molding process, which causes a problem that the manufacturing process increases and the production cost increases.

It is an object of the present invention to simplify the manufacturing process, simplify the apparatus, reduce the size, and reduce the cost, improve the productivity, and manufacture the in-mold label container at low cost. It is an object of the present invention to provide a method and an apparatus for manufacturing a plastic resin in-mold label container.

[0005]

SUMMARY OF THE INVENTION The present invention is intended to achieve the above object by rotating the label inserting means around the same shaft as the rotary mold drum. In particular,
The method for producing a thermoplastic resin in-mold label container of the present invention is provided with a rotary mold drum on the peripheral surface of which a plurality of cavities corresponding to the container shape are arranged in series, and the outer circumference of the rotary mold drum is different At the position, a shaping means for shaping the thermoplastic resin molding object in a temperature state within the viscoelastic region into a container shape in the cavity, and a label insertion for inserting a label attached to the outside of the container into the cavity Means and the label inserting means is inserted into the cavity while rotating the label inserting means in the same direction at the same angular velocity about the same axis as the rotating mold drum, and then the label inserting means is rotated by the rotating mold. It is characterized by rotating in the opposite direction about the same axis as the drum and returning to the original position.

Here, the thermoplastic resin molding target may be a continuous sheet which is continuously supplied to the opening of the cavity, or a so-called blank which is precut according to the shape of the container. Good, but it must be at a temperature that can be shaped by the pressure fluid. And
The thermoplastic resin molded body includes injection molded products and press molded products, and is not limited to a film-shaped product. Further, the shaping means is means for performing thermoforming of the container together with the cavity, which is arranged on the opposite side of the molding object, with respect to the cavity arranged on one side of the supplied thermoplastic resin molding object. is there. Examples of the shaping means include means for performing shaping by pressure forming, vacuum forming, vacuum pressure forming, or each plug assist forming in which a plug is added to these, and depending on each forming method, a cavity is formed. A compressed air box for closing the molded body, a plug for pretensioning the molded body, a compressed air supply means for supplying compressed air, or a clamp for fixing the molded body around the opening of the cavity (however, not a box shape) The configuration may be changed.

Further, from the viewpoint of improving productivity, while the label inserting means is being rotated and the label is being inserted into the cavity, the shaping means is rotated at the same angular velocity about the same axis as the rotary mold drum. It is desirable to shape the thermoplastic resin molding object in the cavity in which the label insertion means has completed the label insertion while rotating in the same direction. However, in the present invention, the shaping means may be fixed to the outer periphery of the rotary mold drum.

The apparatus for producing a thermoplastic resin in-mold label container of the present invention comprises a rotary mold drum in which a plurality of cavities corresponding to the shape of the container are arranged on the peripheral surface, and the rotary mold drum. And a mold driving means for rotating the mold, and a shaping means for molding the thermoplastic resin molding target, which is arranged on the outer periphery of the rotary mold drum and has a temperature within a viscoelastic region, into a container shape in the cavity. A label inserting means for inserting a label to be attached to the outside of the container into the cavity, and a support for arranging and supporting the label inserting means on the outer periphery of the rotary mold drum and rotating about the same axis as the rotary mold drum. It is characterized by comprising a member and a supporting member driving means for rotationally driving the supporting member.

Here, in terms of simplification of the apparatus, it is desirable that the supporting member disposes and supports the shaping means on the outer periphery of the rotary mold drum at a position different from the disposition supporting position of the label inserting means. Further, it is desirable to provide a tuning means for rotating the rotary mold drum and the support member in the same direction at the same angular velocity. Further, if necessary, at least one of punching means for punching out the container forming portion of the thermoplastic resin molded body, trimming means for cutting the edge of the container, or lip forming means for forming the lip portion of the container on the support member. The device may be made multifunctional by supporting one.

[0010]

In the present invention as described above, the label is inserted into the cavity of the rotary mold drum by the label inserting means, and the continuous resin sheet or blank thermoplastic resin molding object is inserted with the label. The thermoplastic resin molded body is introduced into the opening of the cavity and shaped into a container shape using a shaping means to obtain an in-mold label container. At this time, the label is inserted by rotating the support member while rotating the label inserting means in the same direction at the same angular velocity about the same axis as the rotating die drum, and then the label inserting means is connected to the rotating die drum. By rotating in the opposite direction about the same axis and returning to the original position, and repeating the rotational reciprocating motion of such label inserting means, the label is inserted into the next cavity in sequence, and a plurality of in-molds are inserted. We will manufacture label containers.

Therefore, the label inserting process can be performed while rotating the label inserting unit as compared with the conventional case where the label inserting process is performed by the label inserting unit provided at a fixed position on the outer periphery of the rotary mold drum. Therefore, the label insertion processing time can be sufficiently secured, and the rotation pitch of the rotary mold drum can be increased, so that the productivity can be improved. Further, the productivity can be improved without providing a large number of label inserting means, and the device has a simple structure using a rotating mold drum, and does not require a mechanism for moving the mold in a complicated manner. As a result, the size and cost of the device can be reduced. Furthermore, since molding and label mounting are performed in one step, it is not necessary to provide a step for label mounting separately from the molding step.Therefore, curved printing or a method of attaching a printed label to the outside of the container is recommended. The manufacturing process is simplified and the production cost is reduced as compared with the case of adopting.

Further, if not only the label inserting means but also the shaping means is rotated about the same shaft as the rotary mold drum to perform shaping processing, the productivity can be further improved. When not only the label inserting means but also the shaping means are rotated in this way, the label inserting means and the shaping means are arranged and supported at different positions on the outer periphery of the rotary mold drum by the same support member. If so, the structure of the device is further simplified.

Further, if a tuning means for rotating the rotary mold drum and the supporting member in the same direction at the same angular velocity is provided, the rotation of the rotary mold drum and the rotation of the label inserting means during the label inserting process. Can be reliably synchronized, and the label can be reliably inserted at a desired position in the cavity in a desired state, thereby achieving the above-mentioned object.

[0014]

Embodiments of the present invention will be described below with reference to the drawings. First Embodiment FIGS. 1 to 3 show an apparatus 10 for manufacturing a thermoplastic resin in-mold label container according to a first embodiment of the present invention. 2 and 3 are partial schematic views of FIG. 1 as viewed from the side (left or right direction in FIG. 1). The manufacturing apparatus 10 uses a continuous sheet 11 made of a thermoplastic resin within a viscoelastic region of a resin extruded from a T die (not shown) arranged upstream, and is made of a thermoplastic resin for food packaging by direct rotary molding. This is an apparatus for manufacturing the in-mold label container 12.

The manufacturing apparatus 10 includes a base 14, a rotary mold drum 20 in which a plurality of cavities 21 corresponding to the shape of the container 12 are arranged on the peripheral surface, and the rotary mold drum 2.
Mold driving means 30 for rotationally driving 0, and cavity 21
Shaping means 40 for shaping the continuous sheet 11 into a container shape inside
And a cavity 21 label attached to the outside of the container 12.
A label inserting means 90 to be inserted therein, and a supporting member 50 for arranging and supporting the shaping means 40 and the label inserting means 90 on the outer periphery of the rotary mold drum 20 and rotating about the same axis as the rotary mold drum 20. , And a support member driving means 31 for rotating the support member 50.

The rotary mold drum 20 has a substantially octagonal prism shape, and is provided with two cavities 21 for each of the eight sections on its peripheral surface, for a total of 16 cavities 21. The shaft 22 provided at the center of the rotary mold drum 20 is
It is rotatably supported by the base 14 via a bearing 23, whereby the rotary mold drum 20 is freely rotatable around a shaft 22.

The support member 50 has a substantially rectangular frame shape,
The shaping means 40 is supported on one side (upper side in FIG. 1), and the label inserting means 90 is supported on a side (lower side in FIG. 1) opposite to the shaping means 40. The shaping unit 40 can be moved back and forth with respect to the rotary mold drum 20 by an air cylinder device 51 fixed to a support member 50. Support member 5
0 is rotatably supported on the shaft 22 of the rotary mold drum 20 via a bearing 52, and thus the support member 50
Is freely rotatable about the position of the shaft 22 of the rotary mold drum 20. Therefore, the shaping means 40 and the label inserting means 90 supported by the supporting member 50.
The rotary mold drum 20 is rotatable about the same axis.

The shaping means 40 includes a compressed air box 41 that closes the cavity 21, a plug 42 that projects from the compressed air box 41 into the cavity 21 to pretension the continuous sheet 11, and an air cylinder device 43 that advances and retracts the plug 42.
And a compressed air supply means 44 for supplying compressed air into the compressed air box 41. In addition, the rotary mold drum 2
0 is provided with vacuum suction means 25 for performing vacuum suction in each cavity 21 (see FIG. 2). The cavities 21 and the vacuum suction means 25 provided on the rotary mold drum 20 and the shaping means 40 arranged on the outer periphery of the rotary mold drum 20 perform thermoforming by plug-assisted vacuum pressure air molding. It is supposed to be.

At the tip of the compressed air box 41, a cutter 45, which also serves as a punching means for punching the continuous sheet 11 and a trimming means for trimming, is provided so as to project toward the rotary mold drum 20. The punching means and the trimming means are not configured to be used in this way, but may be independently provided as having different functions. Further, a lip forming means for forming the lip portion 12A of the container 12 may be provided at the tip of the compressed air box 41.

The label inserting means 90 is a rotary mold drum 2
A label holder 93 that receives a label 92 from a label supplier 91 (see FIG. 2) provided on the outer periphery of 0 and inserts the label 92 into the cavity 21, and an air cylinder device 94 that advances and retracts the label holder 93. I have it. The label holding portion 93 is configured to rotate about a shaft 95 by a driving unit (not shown) from a solid line state in FIG. 2 to a two-dot chain line state.

A gear 33 is attached to the left end of the shaft 22 of the rotary mold drum 20 in FIG. 1, and the gear 33 is driven to rotate the rotary mold drum 20 via a gear 34. A forward rotation motor 35 that drives the synchronized support member 50 in the forward rotation is connected. On the other hand, the support member 5
A gear 36 is attached to the right side of FIG. 1 in FIG. 1, and a return motor 39 for returning the support member 50 is connected to the gear 36 via a gear 37 and a clutch 38. Therefore, the forward rotation motor 35 constitutes the mold driving means 30, and the forward rotation motor 35 and the returning motor 39 constitute the support member driving means 31.

The end surface of the rotary mold drum 20 on the left side in FIG. 1 is a tuning means capable of advancing and retracting with respect to the support member 50 by an air cylinder device or the like (not shown) incorporated in the rotary mold drum 20. A tuning pin 60 is provided. At the time of shaping, the tuning pin 60 has its tip end inserted into a locking portion 61 such as a groove or a hole formed inside the support member 50, so that the support member 50 and the rotary mold drum 20 have the same angular velocity. It is designed to rotate in the direction. Further, the forward / backward movement of the tuning pin 60 and the engagement / disengagement of the clutch 38 are synchronized, and when the tuning pin 60 projects and is inserted into the locking portion 61, the clutch 38 is disengaged.

In the first embodiment, the container 12 is manufactured as follows. First, as shown in FIG. 2, at the lower position of the rotary mold drum 20 in the figure, the label holding portion 93 of the label inserting means 90 is set to the state of the chain double-dashed line in FIG. 2, and the air cylinder device 94 is operated to activate the label. The holding portion 93 is projected so that the label 92
To receive. At this time, the inside of the cavity 21 located on the lower side of the rotary mold drum 20 in the drawing is empty.
On the other hand, in parallel with the receipt of the label 92 by the label inserting means 90, the continuous sheet 11 is introduced and arranged in the opening of the cavity 21 located on the upper side of the rotary mold drum 20 in FIG. At this time, the label 92 has already been inserted into the cavity 21 located on the upper side in FIG. 2 of the rotary mold drum 20 by the processing in the previous step.
Further, as the continuous sheet 11, a molten resin film (melt web) made of a thermoplastic resin extruded from a T-die extruder and subjected to a suitable molding temperature via a cooling roll, an air knife or the like can be used.

Next, the label holding unit 93 which has received the label 92 from the label supply unit 91 is retracted while holding the label 92. On the other hand, in parallel with this, the air cylinder device 51 is operated to move the shaping means 40 to the rotary die drum 2.
It moves to the 0 side (downward in FIG. 2), and closes the cavity 21 located on the upper side in FIG. 2 while sandwiching the continuous sheet 11 by the tip (lower end in the figure) of the compressed air box 41 and the rotary mold drum 20.

When the label holding portion 93 receives the label 92 and the compressed air box 41 is moved to the rotary mold drum 20 side, the tuning pin 60 is inserted into the locking portion 61 and engaged with the support member 50. Then, in this state, the normal rotation motor 35 is operated to operate the support member 50 (that is, the shaping means 4).
0 and the label inserting means 90) and the rotating mold drum 20 start synchronized rotation (rotation in the same direction at the same speed). The clutch 38 is in the disengaged state while the tuning pin 60 is inserted into the locking portion 61 and the tuning rotation is performed.

Then, while performing the synchronized rotation, the label holding portion 93 is rotated to the state shown by the solid line in FIG. 2, the label holding portion 93 is projected again, and the label 92 is inserted into the cavity 21. On the other hand, in parallel with this label insertion, the cavity 2 is moved by the compressed air box 41 while performing synchronized rotation.
In the state where 1 is closed, the air cylinder device 43 is operated to cause the plug 42 to project into the cavity 21 as shown by the chain double-dashed line in FIG. 2, and the continuous sheet 11 is pretensioned. Subsequently, while performing synchronized rotation, the compressed air is supplied into the compressed air box 41 by the compressed air supply means 44 to press the continuous sheet 11 against the surface of the cavity 21, and the vacuum suction means 25 sucks the vacuum in the cavity 21. Continuous sheet 1
By sucking 1 onto the surface of the cavity 21, the continuous sheet 11 is shaped into a desired container shape. At this time, since the label 92 is already inserted in the cavity 21, the label mounting process is performed at the same time as the shaping process.
Further, while performing synchronous rotation, the cutter 45 is projected toward the rotary mold drum 20 to punch and trim the continuous sheet 11. Further, such punching or trimming is not limited to after shaping, and may be performed before shaping or simultaneously with shaping.

After rotating the support member 50 to a predetermined position (for example, a position rotated by 90 degrees from the state shown in FIG. 2) where the label inserting process and the shaping process while performing such synchronized rotation are completed, The label holding part 93 of the label inserting means 90 and the plug 42 of the shaping means 40 are retracted from the inside of each cavity 21, and the compressed air box 41 is moved in a direction away from the rotary mold drum 20 to return to the original position, Further, the tuning pin 60 is retracted to release the tuning rotation between the support member 50 and the rotary mold drum 20, and the clutch 38 is brought into the connected state.

Then, the return motor 39 is operated to rotate only the support member 50 (that is, the shaping means 40 and the label inserting means 90) in the reverse direction, and returns to the original position shown in FIG. On the other hand, the rotary mold drum 20 is stopped at the position where the synchronized rotation is released, or is rotated in the normal direction by the forward rotation motor 35 as it is, and the completed container 12 is moved to a predetermined position (for example, FIG. 2). The container 12 is taken out at the position on the left side of the center, and the manufacturing of one container 12 is completed. Manufacturing equipment 1
0 is the support member 50 as described above (that is, the shaping means 4).
By repeating the reciprocating rotary motion of 0 and the label inserting means 90), a large number of containers 12 can be sequentially manufactured.

According to such a first embodiment, the following effects can be obtained. That is, the label inserting means 90 is supported by the supporting member 50, and by rotating the supporting member 50, the label inserting means 90 can be rotated about the same axis as the rotary mold drum 20, so that the label inserting means 90 is fixed at the fixed position. Compared to the case of performing the label inserting process, the label inserting process can be performed while rotating the label inserting means 90, so that the label inserting process time can be sufficiently secured and the rotation pitch of the rotary mold drum 20 can be increased. You can
Productivity can be improved.

Further, the productivity can be improved without providing a large number of label inserting means, and the apparatus has a simple structure using the rotary mold drum 20, and a mechanism for moving the mold in a complicated manner. Since it is not necessary, the size and cost of the device can be reduced. Further, since the molding and label mounting can be performed in one step, it is not necessary to provide a step for label mounting separately from the molding step. Therefore, curved surface printing or a printed label is attached to the outside of the container. The manufacturing process can be simplified and the production cost can be reduced as compared with the case where the method is adopted.

Further, not only the label inserting processing by the label inserting means 90 but also the shaping processing by the shaping means 40,
Forming means 4 centered on the same axis as the rotary mold drum 20
Since it can be performed while rotating 0, productivity can be further improved. When the label inserting means 90 and the shaping means 40 are thus rotated, these means 90 and 40 are supported by the same support member 5.
Since it is supported by 0, the structure of the device can be further simplified.

Further, since the tuning pin 60 is provided, the rotation of the rotary mold drum 20 and the rotation of the label inserting means 90 can be surely synchronized at the time of performing the label inserting process, and the label 92 is subjected to the cavity. 21 can be surely inserted in a desired position in 21 in a desired state, and the rotation of the rotary mold drum 20 and the rotation of the shaping means 40 can be surely synchronized in performing a shaping process. Shaped container 12
Can be surely obtained.

Further, a cutter 45 for punching or trimming or a molding machine element other than the shaping means 40 such as a lip forming means is supported by a support member 50, and each of these means together with the shaping means 40. Since the processing of each means can be performed while rotating, a multifunctional device can be easily realized.

Second Embodiment FIG. 4 shows an apparatus 70 for manufacturing a thermoplastic resin in-mold label container according to a second embodiment of the present invention. The manufacturing apparatus 70 is an apparatus that forms the blank 13 having an outer peripheral shape corresponding to the shape of the container 12 from the continuous sheet 11 in advance and manufactures the in-mold label container 12 using the blank 13. The manufacturing device 70
A heating / transfer unit 80 arranged on the left side of the drawing for heating / transferring the blank 13 and a molding for arranging the blank 13 received on the right side of the drawing from the heating / transfer unit 80 into a desired container 12 shape. And part 71.

The heating / transferring section 80 has the same structure as the section for heating / transferring the blank in the thermoforming apparatus proposed by the applicant of the present application in Japanese Patent Application No. 5-212537, and Blank supply section 8
1, a plurality of blank holders 83 arranged in an annular shape around the rotation shaft 82 to rotate and transfer the blanks 13 while holding the blanks 13, and a blank for pushing the blanks 13 supplied from the blank supply unit 81 into the blank holders 83. The pressing unit 84 and the heater 85 for heating the blank 13 held by the blank holder 83 are provided.

Since the molding unit 71 has the same structure and function as the manufacturing apparatus 10 of the first embodiment, the respective parts of the molding unit 71 are designated by the same reference numerals as those of the first embodiment for details. The description is omitted. Note that, in the forming unit 71, unlike the case of the first embodiment in which shaping is performed from the continuous sheet 11, shaping is performed from the blank 13 that has been punched in advance, and in particular, punching and trimming are performed. It is not necessary to provide the cutter 45, but the cutter 45 may be provided as a trimming means for performing trimming for finishing after shaping.

In the second embodiment, the container 12 is manufactured as follows. First, the blank 13 is supplied from the blank supply section 81 to the blank holder 83 located on the upper side in the drawing, and the blank 13 is pushed by the blank pushing section 84 to be securely attached to the blank holder 83. Then, the blank holder 83 is rotatably transferred around the rotary shaft 82 while maintaining this mounted state, and the blank 13 is heated by the heater 85 during this period. Next, when the heated blank 13 reaches the position on the right side of the rotary shaft 82 in the drawing, the blank 13 is transferred to the forming unit 71. Thereafter, the molding section 71 performs label insertion processing, shaping processing of the blank 13 and the like in the same manner as in the first embodiment, takes out the completed container 12 at the right side position in the drawing, and completes the manufacture of the container 12.

According to the second embodiment, the label inserting means 90 and the shaping means 40 are the same as in the first embodiment.
Since the label insertion process and the shaping process can be performed while rotating the rotating mold drum 20 about the same axis as the rotary mold drum 20, the same effects as those of the first embodiment, that is, the improvement of productivity and the downsizing of the apparatus are achieved. In addition, the cost of the apparatus can be reduced, the manufacturing process can be simplified, and the production cost can be reduced, and since the blank 13 is used for thermoforming, scrap is not generated in the thermoforming process. Therefore, it is possible to improve the utilization efficiency of materials or facilitate recycling.

The following experiment was conducted in order to confirm the effect of the present invention. Manufacturing apparatus 10 of the first embodiment
In the cavity 21 the polypropylene (PP) film label preprinted by the label inserting means 90 is
Insert inside. Then, a molten resin film made of polypropylene extruded from the T-die extruder (temperature 180 to 220)
(° C, thickness 1 mm) is introduced into the opening of the cavity 21 in which the label has already been inserted, the compressed air box 41 is lowered to clamp the peripheral edge of the cavity 21 of the rotary mold drum 20, and then the plug 42 is inserted into the cavity 21. The cup-shaped in-mold label container having a diameter of the opening portion of 80 mm and a height of 80 mm is formed by advancing inward, shaping by applying a pneumatic pressure of 3 kg / cm ² by the pneumatic supply means 44, and punching at the same time. Got However, unlike the case of FIG. 1,
In the width direction of the rotary mold drum 20, eight rows of cavities 21 are arranged instead of two rows. As a result, 28 per hour
800 containers could be obtained. When the same container is manufactured by the conventional device (8 rows installed in the width direction, 8 punching at the same time, 20 shots / minute), only about 9600 containers can be obtained in 1 hour. The effect of the invention was remarkably shown.

The present invention is not limited to the above-mentioned embodiments, and modifications and the like within the range in which the object of the present invention can be achieved are included in the present invention. That is, in each of the above-described embodiments, the shaping means 40 is supported by the support member 50 and is rotatable, but in the present invention, the shaping means 40 is not necessarily rotatable. In short, the label inserting means 90 may be configured to be rotatable. However, from the viewpoint of improving productivity, it is preferable that the shaping device 40 also has a rotatable structure.

Further, in each of the above embodiments, the label inserting means 90 and the shaping means 40 are supported by the same supporting member 50, but these respective means 90, 40 are respectively supported by separate supporting members. It may have been done. But,
In terms of simplification of the device, it is preferable to support the same support member 50.

Further, in each of the above-mentioned embodiments, the tuning pin 60 which is the tuning means is provided on the rotary mold drum 20 side so as to be able to move forward and backward with respect to the support member 50.
It may be provided on the side of the support member 50 and configured to be movable back and forth with respect to the rotary mold drum 20. Further, the tuning means is not limited to such mechanical locking by the tuning pin 60, and for example, the rotating die drum 20 is controlled by electrically controlling the die driving means 30 and the supporting member driving means 31. And the support member 50 may be synchronously rotated.

Further, in each of the above-mentioned embodiments, the mold driving means 30 is constituted by the forward rotation motor 35, and the support member driving means 3 is constituted by the forward rotation motor 35 and the return motor 39.
1, the support member driving means 31 is composed of two motors and the forward rotation motor 3 is used.
Although 5 is also used as the mold driving means 30 and the supporting member driving means 31, a motor for individually driving the rotary mold drum 20 and the supporting member 50 is provided, and each of these motors is driven by the mold driving means 30. Alternatively, the support member driving means 31 may be used. In that case, the motor constituting the support member driving means 31 may be a motor that performs both forward rotation and reverse rotation.

In each of the above-described embodiments, when the support member 50 is normally rotated, the clutch 38 is disengaged to disconnect the return motor 39 and the support member 50, but the clutch 38 is not provided. Alternatively, the gear 37 may be moved in the left-right direction in FIG. 1 to disengage the gear 37 and the gear 36 from each other, thereby releasing the connection between the return motor 39 and the support member 50.

Further, in each of the above embodiments, the support member 50 is used.
Although the return motor 39 returns the original position to the original position, the supporting member 50 may be returned to the original position by another driving source such as an air cylinder device. Further, in each of the above-described embodiments, the rotation angle at which the support member 50 reciprocates is 90 degrees, but it may be an arbitrary angle.

Further, in each of the above-described embodiments, the entire supporting member 50 is configured to rotate about the same axis as the rotary mold drum 20, but the supporting member of the present invention has at least the label inserting means. Rotating mold drum 2 supports
It suffices that it is configured to rotate about the same axis as 0, and for example, it may be a support member or the like that is guided by a rail provided along the outer periphery of the rotary mold drum 20 to move.

Further, in the first embodiment, the cutter 45
Although it is configured to perform punching by projecting the cutter, the rotary mold is further moved from the clamp position when shaping the compressed air box 41 without providing the cutter 45 (the position where the continuous sheet 11 is clamped during shaping). The punching may be performed by moving the drum 20 to the drum 20 side.

The material of the molding object made of the thermoplastic resin applied to the present invention is polypropylene (PP),
Any material that can be applied to thermoforming, such as polystyrene (transparent PS), composite material, and multilayer material, may be used. further,
The material of the label applied to the present invention may be any material such as polypropylene, but it is desirable to use the same or similar material as the thermoplastic resin molded body from the viewpoint of waste disposal.

Further, the size and shape of the label are determined by the container 12
Any size and shape can be mounted on the outside of the.
Further, the means for holding the label 92 inserted in the cavity 21 is arbitrary such as vacuum suction.

[0050]

As described above, according to the present invention, the label inserting process is performed while the label inserting means is rotated about the same shaft as the rotary mold drum, so that the label is inserted at the fixed position. Compared with the above, the label insertion processing time can be sufficiently secured, the rotation pitch of the rotary mold drum can be increased, productivity can be improved, and a simple structure without providing a large number of label insertion means. Since the productivity can be improved with, it is possible to downsize the device and reduce the cost of the device, and since the molding and the label mounting can be performed in one process, the manufacturing process can be simplified and the production can be performed. There is an effect that the cost can be reduced.

Further, when not only the label inserting means but also the shaping means is rotated around the same shaft as the rotary mold drum to perform the shaping treatment, the productivity is further improved. The effect is that you can. And
When not only the label inserting means but also the shaping means is rotated, if the label inserting means and the shaping means are supported by the same supporting member, the structure of the apparatus can be further simplified.

Further, in the case where a tuning means for tuning and rotating the rotary mold drum and the support member (that is, the label inserting means) is provided, the rotation of the rotary mold drum and the label inserting means during the label inserting process. It is possible to reliably synchronize the rotation of the label with the rotation of the label, and it is possible to reliably insert the label at a desired position in the cavity in a desired state.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram showing a first embodiment of the present invention.

FIG. 2 is a partial schematic view of the first embodiment.

FIG. 3 is a partial schematic view of another state of the first embodiment.

FIG. 4 is an overall configuration diagram showing a second embodiment of the present invention.

[Explanation of symbols]

10,70 Thermoplastic resin container manufacturing apparatus 11 Continuous sheet which is a thermoplastic resin molded object for molding 12 Thermoplastic resin container 13 Blank which is a thermoplastic resin molded object 21 for molding 21 Cavity 20 rotation Mold drum 30 Mold driving means 31 Support member driving means 35 Forward rotation motor constituting mold driving means and support member driving means 39 Return motor constituting support member driving means 40 Shaping means 50 Supporting member 60 Tuning means Tuning pin 90 Label insertion means 92 Label

Front page continuation (72) Inventor Kosaburo Matsuzawa 2-27-2 Hiromichi, Adachi-ku, Tokyo Matsuzawa Manufacturing Co., Ltd.

Claims (5)

[Claims] 1. A rotary mold drum, in which a plurality of cavities corresponding to the shape of a container are arranged in a row, is provided on a peripheral surface, and temperature conditions in a viscoelastic region are provided at different positions on the outer circumference of the rotary mold drum. Forming means for shaping the molded object made of thermoplastic resin into the container shape in the cavity, and label inserting means for inserting a label attached to the outside of the container into the cavity are arranged in advance. The label inserting means inserts the label into the cavity while rotating the label inserting means in the same direction at the same angular velocity about the same axis as the rotating die drum, and then the label inserting means is connected to the rotating die drum. A method for producing a thermoplastic resin in-mold label container, which comprises rotating the same axis in opposite directions and returning it to the original position. 2. The method of manufacturing a thermoplastic resin in-mold label container according to claim 1, wherein the shaping means is inserted while the label is being inserted into the cavity while rotating the label inserting means. While shaping the thermoplastic resin molded body in a cavity in which label insertion by the label inserting means has already been completed while rotating in the same direction at the same angular velocity about the same axis as the rotary mold drum. A method for producing a thermoplastic resin in-mold label container, which is characterized by carrying out. 3. A rotary mold drum having a plurality of cavities corresponding to the shape of the container arranged on the circumferential surface, mold driving means for rotating the rotary mold drum, and the rotary mold drum. A shaping means for shaping a thermoplastic resin molding target placed in the outer periphery to a temperature state within a viscoelastic region into the container shape in the cavity, and a label attached to the outside of the container in the cavity. A label inserting means to be inserted into the inside, a supporting member which disposes and supports the label inserting means on the outer periphery of the rotating mold drum, and rotates about the same axis as the rotating mold drum, and the supporting member is rotationally driven. And a supporting member driving means for manufacturing the in-mold label container made of a thermoplastic resin. 4. The apparatus for manufacturing a thermoplastic resin in-mold label container according to claim 3, wherein the support member is configured to move the shaping means at a position different from a position where the label inserting means is supported. An apparatus for manufacturing a thermoplastic resin in-mold label container, which is arranged and supported on the outer periphery of a mold drum. 5. The apparatus for manufacturing a thermoplastic resin in-mold label container according to claim 3 or 4, further comprising a tuning means for rotating the rotary mold drum and the support member in the same direction at the same angular velocity. An apparatus for manufacturing a thermoplastic resin in-mold label container, which is characterized by being provided.