JPH0651375B2 - Thermoplastic fusion box manufacturing equipment - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an apparatus for manufacturing a thermoplastic resin heat-sealing box, and more specifically, to improve the accuracy of box-making processing and reduce box-making defects. By doing so, it is possible to perform stable box forming processing, and to continuously receive, cool and take out the box after it has been made, making it possible to speed up the box making process. The present invention relates to a packaging box manufacturing device.

<Problems to be Solved by Conventional Techniques and Inventions> Conventionally, a hot blade is pressed against a thermoplastic resin plate to form a V-shaped bent groove, and unnecessary ears corresponding to the corners of the plate are melted and cut. Immediately after that, the plate material is pushed into the cylindrical mold to erect the side wall surface formed outside the bending groove,
A method of manufacturing a box by crimping the corners in a molten state is well known (see Japanese Utility Model Publication No. 53-17352). However, it is difficult to accurately press the plate material into the mold for bending and assembling, the side wall surface of the plate material cannot be accurately erected and heat-sealed, and the accuracy of the box making process deteriorates. There was a problem that the box manufacturing failure occurred.

Various measures have been considered as means for solving these problems. For example, a means for attaching a suction device for setting the plate material at a predetermined position in the vicinity of the cylindrical mold (Japanese Patent Laid-Open No. 61-61160)
-104834), in order to prevent the resin from adhering to the hot blade and moving the plate material after fusing the plate material, a means for pressing the plate material by operating the claw from the side surface of the plate material was devised. It was However, in any case, immediately before pushing the plate material into the mold with the pressing plate, the fixing of the plate material by the above means must be released, and the plate material is accurately pushed into the cylindrical mold to perform the box making process. We were unable to solve the problem of improving the accuracy of and improving the box-making defects.

In addition, in the above-mentioned conventional technique, it is usually necessary to use a cylindrical mold in which
In addition to stocking one to several box-formed products, cooling and distortion correction of the heat-sealed portion after bending and assembling are also performed in this tubular mold. However, in this case, the product that was previously boxed was pushed out by the product that was boxed later, and the product was automatically taken out from the tubular mold, so it was sufficiently cooled and cured in the tubular mold. Even if the product that has not been pressed still presses the product that was pushed in earlier, it is difficult to apply uniform pressing force, and not only the product distortion is not corrected, but also the distortion between the boxes occurs. It was. Moreover,
Intermittently performing box making, cooling, and take-out work by bending and assembling plate materials in the tubular mold at the above-mentioned fixed position is extremely inefficient in box making work, and cannot speed up box making work. There was a problem.

This invention has been made in view of the above problems,
The heat that can improve the accuracy of the box making process and reduce defective box making, and can continuously receive, cool and take out the box after box making, which can speed up the box making process. It is an object of the present invention to provide an apparatus for manufacturing a heat-sealing box made of a plastic resin.

<Means for Solving the Problems> As a device of the present invention for achieving the above object, a plate-like member of a thermoplastic resin, in which a bent groove is formed and unnecessary ears are removed, is pushed into a box shape. A box-making zone composed of a molding die for forming a box by bending and assembling, a cooling zone for cooling the box arranged at a position different from the box-making zone, and an extraction zone for taking out the box to the outside. In the manufacturing apparatus of the heat fusion box having, each zone is located on the turntable, the transfer mold is provided on the turntable in each zone, in the box-making zone, at the center of the hot blade. A pressing plate that can be inserted through the formed passage hole and a pressing plate that can reciprocate inside the molding die so as to face the pressing plate are provided.
The plate member is formed to be sandwichable by the pair of pressing plates, and the plate member is configured to be insertable into a molding die.
Further, a movable transfer die is positioned below the forming die by a turntable, and the box after box making pushed into the transfer die can be sequentially conveyed to the cooling zone and the take-out zone. It is characterized in that it is configured.

<Operation> According to the invention device having the above configuration, the plate material is pushed into the molding die in a state where the plate material is sandwiched between the pair of pressing plates from above and below, and thus the plate material is displaced. Alternatively, the upright assembly of the side wall surface can be performed without rising. Furthermore, after inserting the box into the transfer mold located on the movable turntable located below the molding mold,
Since the above-mentioned transport die is sequentially conveyed to the cooling zone and the take-out zone to cool and take out the box, while the box is being cooled or taken out, the side wall surface is erected from the next plate to assemble the box. The above series of operations can be continuously performed.

<Example> Next, an example of the present invention will be described below with reference to the drawings.

1 and 2 show the entire apparatus, and (1)
Is a storage hopper for the plate material (P) as a material, and a large number of plate materials (P) of thermoplastic resin sheets are vertically stacked and stored. Further, (2) and (20) are supply rollers provided in a pair in the upper and lower sides, and belt-shaped belts are attached, and the plate materials (P) are sequentially taken out one by one and the box forming zone (S1 ). Note that guide plates (3) and (3) for accurately guiding the plate material (P) to the box making zone (S1) are provided at left and right positions in the traveling direction of the plate material (P).

And, (6) in the box-making zone (S1) is a molding die in which a cavity having a rectangular cross section is formed, and a plate material is provided in the molding die (6).
It is a fixed mold that can press (P) and erect the side wall surface of the plate (P) to fold and assemble into a box shape to form the box (P1) (see FIG. 6). The cross-sectional size of the molding die (6) can be adjusted according to the size of the box (P1) to be molded, and the cross-sectional shape is not limited to the above rectangular shape.
It is also possible to form and implement an arbitrary polygonal cross-sectional shape such as a prism. Then, below the molding die (6), the box (P1) is movably transported to a cooling zone (S2) and an extraction zone (S3) provided at a position different from the box making zone (S1). The transfer mold (7) is installed in series. Incidentally, the transfer mold
(7) is integrally formed with a turntable (10) described later, and the box-making zone (S
1), the cooling zone (S2) and the take-out zone (S3) are located, and the transfer molds (7) having the same structure and shape are provided at the positions of the respective zones, and the turntable (10) is used for simultaneous operation. Each zone is configured to be able to move and stop at the same time.

Further, a plurality of L-shaped stoppers (4) and one positioning pusher (40) are attached to the upper surface of the molding die (6) so as to surround the opening, and the supply roller (2)
The plate material (P) that is intermittently supplied to the upper surface of the molding die (6) from the (20) is set to a predetermined position every time.
The L-shaped stopper (4) mounted on the upper surface of the molding die (6) can be adjusted in its mounting position by forming an elongated hole in the mounting portion of the molding die (6) (Fig. (Not shown).

Next, above the molding die (6), a thermal blade (5) movable vertically is provided by a cylinder mechanism (50) etc., and the role of this thermal blade (5) is Pressing against the plate material (P) set on the upper surface of the mold (6) to form a V-shaped bent groove, and melting and cutting the ears of each corner of the plate material (P) which is not necessary for box making. Is. A cartridge heater for heating is embedded inside the cutting edge of the hot blade (5), and the square frame portion (51) of the hot blade (5) is bent in a V shape on the plate material (P). A portion (52) which forms a groove and extends outward of the corner frame portion cuts the ear portion. Further, (53) is a pressing plate described later.
It is an insertion hole through which (8) passes, and is formed by leaving the center of the hot blade (5) open (see FIG. 5). The ears may have been melted beforehand.

In addition, in FIG. 5, the hot blade (5) shows a cross beam shape, but the heat blade (5) is not limited to the above cross beam shape, for example, a polygonal shape such as a hexagon. But it can be implemented.

And (8) and (9) are the upper and lower pressing plates,
The cylinder mechanism (80), (90), etc. are each formed so as to be movable in the vertical direction, and the pressing plate (8) on the hot blade (5) side is the hot blade (5).
It is formed so that the plate material (P) set on the upper part of the molding die (6) can be pressed from above, through the insertion hole (53) formed in the center of the hot blade (5) to project downward. Also, the pressing plate (8) on the side of the molding die (6) passes from the lower side of the molding die (6) and the conveying die (7) through the inside of the die (6) (7) to form the molding die. Type
(6) The plate material (P) set on the upper surface is formed so that it can be supported from below. The stroke of the cylinder in the pressing plate (8) on the side of the hot blade (5) is the mold for molding the box (P1).
It is assumed that the range is set so that it can be pushed into the conveying die (7) provided below (6). Further, the pair of pressing plates (8) and (9) are formed so as to be vertically movable while securely holding the plate member (P) (see FIG. 2).

Further, (10) is a turntable, and the turntable (10) can simultaneously move and stop at the positions of the box making zone (S1), the cooling zone (S2) and the take-out zone (S3). (7) is integrally formed, and under this turntable (10), in the box-making zone (S1), the transfer mold is used.
A box (P1) pushed into the inside (7) is provided with a transfer means (11) having a rotation mechanism capable of sequentially moving and stopping the box (P1) to predetermined positions in the cooling zone (S2) and the take-out zone (S3). . Then, in the cooling zone (S2) or unloading zone (S3), while performing the cooling and unloading work of the box (P1),
In the box making zone (S1), the following plate materials (P) are supplied at the same time,
The box making work is performed by heating and melting and bending and assembling (see FIG. 1).

In the cooling zone (S2), the box (P
A cooling means such as an air cooling fan capable of forcibly cooling 1) is provided (not shown), and the box (P1) is provided in this cooling zone (S2).
It is possible to rapidly remove the distortion and the like of the fusion-bonded portion that is bent and assembled in the box-making zone (S1) while the operation is stopped.

Further, one pressing plate (12) is provided vertically upward corresponding to the stop position of the take-out zone (S3), and this pressing plate (12) is operated by the cylinder mechanism (120) and the like, By pressing the box (P1) that has been transported to the take-out zone (S3) in the transport mold (7), it can be discharged onto the conveyor (13) provided below the turntable (10), The box (P1) is formed so that it can be automatically transferred from the box making process to the next process (see FIGS. 1 and 3).

Next, using the heat fusion box manufacturing device described above, the box
The method for producing (P1) will be described.

First, the plate material (P) is the storage hopper (1) in front of the box making zone (S1).
The material is supplied to the box-making zone (S1) by the material supply rollers (2) and (20), and the lateral deviation is corrected by the guide plates (3) and (3) on the way. Then, an L-shaped stopper on the upper surface of the molding die (6) set in advance to form the box (P1) of a predetermined size.
It is set at a predetermined position by (4) and the positioning pusher (40).

Then, in the box-making zone (S1), before the hot blade (5) is brought into contact with the plate material (P), the pressing plate (8) provided above the hot blade (5) and the molding metal facing the pressing plate (8). The pressing plate (9) provided below the mold (6) and the transfer mold (7) is operated from above and below, and the pair of pressing plates (8) and (9) are attached to the upper surface of the molding mold (6). Hold the central portion of the set plate (P) securely to fix the plate (P) (see FIG. 7). In this state, press the hot blade (5) against the plate material (P),
V-shaped bent grooves are formed and the ears are melt-cut (8th
See figure). However, the ears may have been removed in advance.

After that, the hot blade (5) retracts to a predetermined position, but since the pair of pressing plates (8) and (9) securely hold the plate material (P), the hot blade (5) has the plate material (P). Even if the resin of No. 2 adheres, the plate material (P) will not be lifted upward together with the hot blade (5) or moved left and right. It should be noted that the ears of the plate material (P) blown off on the upper surface of the molding die (6) may be removed using a known means such as pressure air.

Furthermore, the pair of pressing plates (8) and (9) start moving vertically downward while holding the plate member (P), and the plate member (P) excluding the ears
Is pushed into the molding die (6) (see FIG. 9). And
The side wall surface of the plate material (P) rises up from the bending groove along the inner wall of the molding die (6), and the fused parts at the corners of the plate material (P) are pressed together into a box shape with a polygonal bottom surface. Boxed. At this time, since the plate member (P) is surely restricted in horizontal and vertical movements by the pair of upper and lower pressing plates (8) and (9), when the bending and assembling are performed, the gap between the fusion-bonded portions is not A box (P1) having a high box-making accuracy can be formed without causing the positional displacement which has been a cause of uniformity, and it is possible to reduce the box-making defect and also to reduce the manufacturing cost.

Thus, in the box making zone (S1), when the plate material (P) is bent and assembled and the forming process of the box (P1) is completed, then the box (P1) is placed below the forming die (6). It is pushed into the transfer mold (7) positioned at (see FIG. 10).

After this, the pressing plates (8) and (9) release the holding of the box (P1) and retreat to the predetermined positions. Then, the box (P1) that has been pushed into the transfer die (7) and received is transferred to the cooling zone (S2) by the turntable (10) and the transfer means (11) (see FIG. 11). .

Since the cooling zone (S2) is provided with means such as an air-cooling fan that can be forcibly cooled, the boxes (P1) that are intermittently sequentially conveyed to the cooling zone (S2) can be moved in a short time. The cooling of the box (P1) can be eliminated as well as cooling.

Furthermore, after it has been sufficiently cooled in the cooling zone (S2), the box (P
1) is conveyed to the take-out zone (S3), the pressing plate (12) provided above the take-out zone (S3) enters the conveying die (7) and presses the box (P1). Eject the box (P1) downward. Then, the box (P1) discharged from the transfer mold (7) is sent to the outside of the box making device by a transportation means such as a conveyor (13) formed below the take-out zone (S3) ( Third
See figure).

As described above, according to the manufacturing apparatus for the heat-sealing box of the present invention, the plate material (P) is supplied in the box-making zone (S1), the box-making work by bending and assembling after positioning, and the cooling zone (S2). The cooling work for forced cooling of the box (P1) and the removal of strain in the box (P1) and the take-out work for taking out the box (P1) in the take-out zone (S3) are carried out according to the turntable according to each zone. Since it can be carried out simultaneously at the stop position of the transfer mold (7) provided in (10), the polygonal box (P1) with side walls bent upright around the bottom plate is automatically The boxes (P1) can be manufactured efficiently, at a low cost, because the idle time can be very short, as well as the boxes can be manufactured sequentially.

If a more compact device is desired due to equipment space, etc., the cooling zone (S2) and extraction zone (S3)
It is also possible to form so that cooling and extraction can be performed at the same place without providing and at different positions. In this case, the forced cooling device in the cooling zone (S2), the pressure plate (12) for discharging the product in the take-out zone (S3) and the conveyor
Conveying means such as (13) will be installed centrally in one place (see FIG. 12).

Further, as the plate material (P) of the thermoplastic resin, foamed or non-foamed plastic corrugated cardboard made of a thermoplastic resin such as polypropylene, polystyrene, or polyethylene can be used. It can be carried out by laminating a non-foamed film, paper or metal foil on one or both sides.

Further, as the shape of the plate material (P), unnecessary ears to be fused by the hot blade (5), it is also possible to use a plate material (P) having a shape cut out in advance, even in this case, Molding die
The plate material (P) can be accurately positioned by the L-shaped stopper (4) and the positioning pusher (40) on the upper surface of (6), and the plate material (P) can be securely held by the pressing plates (8) and (9). Since it is held between the hot blade (5) and the plate material (P), the positional deviation does not occur.

In addition, as the drive mechanism of each part, various modifications can be made within the scope of the invention, such as cams, links and the like, which are greater than those of the illustrated cylinder mechanism.

<Effects of the Invention> As described above, according to the thermoplastic resin heat-sealing box manufacturing apparatus of the present invention, the hot blade is pressed against the plate material while the plate material is held by the pair of pressing plates. Since the device is configured to press the plate material into the molding die as well as the contact, it is possible to perform box making by assembling the box by erecting the side wall surface without causing the plate material to be displaced or lifted at all. Therefore, it is possible to improve the accuracy of the box-making process without causing the quality variation, reduce the box-making defects, and reduce the manufacturing cost.

In addition, since the boxes for receiving, cooling, and taking out the box after box making are located on the turntable, and in each zone, the transfer mold is provided on the turntable, it is positioned below the molding mold. After the box is inserted into the movable transfer mold and received, the transfer mold can be transferred to a predetermined position to cool and take out the box.Therefore, at the same time while cooling and taking out the box, The next box side wall surface can be assembled by standing assembly, and the above series of operations can be performed continuously and without waste. Therefore, the boxes can be automatically and sequentially manufactured, idle time can be reduced, and the overall speed of the box making process can be increased.
Boxes can be manufactured very efficiently and at low cost with a compact device.

Further, in the box-making zone, the plate material is clamped by a pair of upper and lower pressing plates facing each other, so that the plate material is clamped by the conventional clamp mechanism or the complicated ear part removing means is used. Since there is no need to provide it,
The number of parts can be reduced, the device can be simplified, and the maintenance and inspection of the device can be easily handled, and the device is also extremely safe. Moreover, since the heat fusion box after bending and assembling could not be cooled sufficiently because it was in the vicinity of the hot blade, the cooling zone and take-out zone, which had been a hindrance for improving the box making speed, were made above. Since it is provided at a position different from the box zone and the transfer die on the turntable can be used to sequentially transfer the boxes to the cooling zone or the take-out zone, cooling and distortion can be sufficiently removed. In addition, it is possible to efficiently perform the box-making process in a short time and improve the productivity.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention. FIG. 1 is a plan view showing the entire apparatus, FIG. 2 is a side view taken along the line I-I of FIG. 1, and FIG. 3 is FIG. II-II arrow side view of FIG. 4, FIG. 4 is a perspective view showing a state in which a bent groove is formed in the plate material and the ears are cut, FIG. 5 is a perspective view of the hot blade, and FIG. FIG. 7 is a perspective view of the molding die, FIG. 7 is a cross-sectional view showing a state in which the plate material is held by the pressing plate, and FIG. 8 is a state in which the plate material is held by the pressing plate and the hot blade is in contact with the plate material. 9 is a sectional view showing a state in which the plate material is held by a pressing plate and the plate material is pushed into the molding die, and FIG. 10 is a case where the box is held by the pressing plate. FIG. 11 is a cross-sectional view showing a state where the box is pushed into the conveying die, FIG. 11 is a sectional view showing a state where the holding die of the pressing plate is released and the box is conveyed by the conveying die, FIG. , Cooling zone and unloading And the over emissions is a plan view showing a modification which is installed in the same position. (5) …… Hot blade, (6) …… Molding die, (7) …… Conveying die, (8)
(9) …… Pressing plate, (P) …… Plate material, (P1) …… Box, (S1) …… Box making zone, (S2) …… Cooling zone, (S3) …… Ejecting zone.

Claims (1)

[Claims] 1. A box made of a molding die for molding a box by pushing a thermoplastic resin plate having a bent groove and removing unnecessary ears and bending and assembling the box. A manufacturing apparatus for a heat-sealing box having a zone, a cooling zone for cooling the box arranged at a position different from the box-making zone, and an extraction zone for taking out the box to the outside, wherein each zone is turned. It is located on the table, and in each zone, a transfer die is provided on the turntable.In the box making zone, a pressing plate through which a passage hole formed in the center of the hot blade can be freely inserted, A pressing plate that can reciprocate inside the molding die is provided, and the plate material can be sandwiched by the pair of pressing plates, and the plate material can be inserted into the molding die. , Can be freely moved under the molding die with a turntable A heat-bonding thermoplastic resin, characterized in that a metal mold is located, and the box after box making pushed into the carrier metal mold can be successively conveyed to the cooling zone and the take-out zone. Box manufacturing equipment.