JP2020110990A - Mold for deep drawing packaging container, and deep drawing packaging container - Google Patents

Abstract

To provide a mold for a deep drawing packaging container capable of manufacturing a container body for properly packaging an accommodation target article.SOLUTION: This invention relates to a mold 31 for a deep drawing packaging container for manufacturing the deep drawing packaging container provided with a container body and a top film to be adhered on its upper surface. The mold 31 for the deep drawing packaging container is provided with a box-like mold body 32 opened upward. The mold body 32 has: a front wall part 33 in correspondence with a front side in the advancing direction of the deep drawing packaging container being manufactured; a rear wall part 34 in correspondence with a rear side in the advancing direction; and a bottom part 36 provided with sucking holes 37. At least one of the front wall part 33 and the rear wall part 34 has a mold step part 39 a lower side of which protrudes inward with respect to an upper side.SELECTED DRAWING: Figure 3

Description

The present invention is a mold for a deep-drawing packaging container for molding the container body in the case of producing a deep-drawing packaged product in which the opening of the container body containing the article to be housed is closed with a top film, and The present invention relates to a deep-drawing packaging container including a container body molded by the deep-drawing packaging container mold.

There are many known methods for producing this kind of deep-drawing packaging container from a resin film, but in general, it is often produced using a deep-drawing packaging container mold.

When using such a deep-drawing packaging container mold, from the production of the container body of the deep-drawing packaging container, the article to be accommodated is contained in the container body, and the opening of the container body is sealed with a top film. Deep-drawn packaged products are often manufactured in a continuous packaging process in which work is continuously performed up to a closed state.

That is, as shown in FIG. 10, in the continuous packaging step, first, the resin bottom film 1 is introduced into the heating vacuum forming unit 2.

In this heating vacuum forming unit 2, the bottom film 1 is adhered so as to follow the internal shape of the deep-drawing packaging container mold 3 by vacuuming while the bottom film 1 is softened by heating, and the bottom film 1 is deep-drawn packaging container. It is formed into the shape of the metal mold 3.

After that, the bottom film 1 is cooled and solidified to form the box-shaped container body 4 that is opened upward.

After accommodating the gauze 5 which is the object to be accommodated in the container body 4, the container body 4 and the top film 6 are introduced into the heat seal molding section 7.

The top film 6 is, for example, a composite film in which a plurality of types of resin sheets are laminated, or a film in which the surface of paper is coated with a resin, and the resin on the adhesive surface side or the coated resin is heated. By doing so, an adhesive force is generated and pressure is applied.

Then, the flange provided on the upper side surface of the container body 4 and the top film 6 are thermocompression-bonded by the heat-seal molding part 7, so that the gauze 5 of the container body 14 is accommodated in the container body 14. The opening is closed and closed with the top film 6.

Then, the thermocompression bonding portion is cut by the cutting machine 8 to complete the individual deep-drawing packaged product 9.

Here, the deep-drawing packaged product is supposed to be a plurality of types of articles having different shapes and sizes as articles to be accommodated, but if a dedicated molding die is prepared in accordance with the shape and size of the articles to be accommodated, A large number of molding dies are required, and particularly in the case of relatively expensive molding dies, it is not efficient.

Therefore, for example, Patent Document 1 describes a method of installing a nested die, which is divided according to the size and number of articles to be accommodated, inside the molding die.

Japanese Utility Model Publication No. 7-17706

In general, in the case of storing an article to be accommodated in a deep-drawing packaging container, some clearance is often generated between the container body and the article to be accommodated.

In addition, although a plain-woven gauze or the like is assumed as the article to be accommodated, this gauze is formed by connecting the plain-woven gauze bodies with each other by the gauze warp, and cutting the gauze warp at the intermediate portion between the gauze bodies. By doing so, each piece becomes a separate piece of gauze. That is, the gauze has a structure in which the gauze warp threads are provided at both ends of the gauze body in one direction.

When such a gauze is housed in a deep-drawing packaging container, some space is formed between the gauze and the warp side as well as the inner wall of the container body.

When a space is created on the gauze warp side, the gauze body moves in the container body due to a reaction or a shock that is temporarily stopped when the container body and the top film are bonded together in the continuous packaging process.

Then, with the movement of the gauze body, the gauze warp threads are arranged on the flange of the container body so as to protrude from the container body, and the gauze warp threads are bonded in a state of being sandwiched between the container body and the top film. there is a possibility.

In this way, if a part of the article to be accommodated, such as gauze warp, is sandwiched between the container body and the top film and they are adhered to each other, it causes a problem such as adhesion failure.

In addition, the movement of the gauze body during the continuous packaging process is not taken into consideration only by defining the space for storing the product in the container body as in Patent Document 1 and the like, and thus the container body and the top film are not considered. It is not possible to effectively prevent a part of the articles to be housed from being sandwiched between them.

Therefore, in the production of deep-drawing packaged products, there has been a demand for a technique capable of appropriately packaging the articles to be accommodated without causing defects such as defective adhesion in a continuous packaging process.

The present invention has been made in view of such a point, and a deep-drawing packaging container mold capable of molding a container body for appropriately packaging a storage target article, and a deep-drawing packaging capable of appropriately packaging a storage target article. The purpose is to provide a container.

The mold for a deep-drawing packaging container according to claim 1 is for molding the container body when manufacturing a deep-drawing packaging product in which the container body containing the articles to be housed is closed with a top film. In a deep-drawing packaging container mold, a front wall portion corresponding to a front side in a traveling direction of the container body in a manufacturing process of the deep-drawing packaging product, a rear wall portion corresponding to a rear side in the traveling direction, and a suction hole. And a bottom part provided with a box-shaped mold body that is opened upward, and at least one of the front wall part and the rear wall part is a mold step part with a lower part protruding inward. Is to have.

The mold for a deep-drawing packaging container described in claim 2 is the mold for a deep-drawing packaging container according to claim 1, wherein the mold step portion is constituted by a metal piece fixed in the mold body. It is a thing.

The mold for a deep-drawing packaging container described in claim 3 is the mold for a deep-drawing packaging container according to claim 1, wherein a metal dish having a communicating suction hole fixed in the mold body and communicating with the suction hole is provided. The mold step portion is constituted by the edge portion of the metal dish.

The mold for a deep-drawing packaging container described in claim 4 is the mold for a deep-drawing packaging container according to any one of claims 1 to 3, wherein the mold step portion has a height dimension of a portion protruding inward. Is 1/3 of the depth of the mold body, and the width of the portion protruding inward is 10 mm.

The deep-drawing packaging container according to claim 5 is a deep-drawing packaging container including a container body capable of accommodating an article to be accommodated and a top film closing the container body.
The container body is provided with a container step portion whose lower portion projects inward on at least a part of the inner surface thereof.

According to the present invention, since the mold for a deep-drawing packaging container has the mold step portion, it is possible to mold the container body for appropriately packaging the accommodation target article.

In addition, since the deep-drawing packaging container has the container step portion, it is possible to appropriately package the article to be stored.

It is a top view which shows the structure of the deep-drawing packaging product using the deep-drawing packaging container which concerns on the 1st Embodiment of this invention. It is sectional drawing which shows a deep-drawing packaging product same as the above. It is a top view which shows the structure of the metal mold|die for deep-drawing packaging containers used when manufacturing a deep-drawing packaging product same as the above. It is sectional drawing which shows the metal mold|die for deep-drawing packaging containers same as the above. It is sectional drawing which shows the structure of the metal mold|die for deep drawing packaging containers which concerns on the 2nd Embodiment of this invention. It is a top view which shows the structure of the metal mold|die for deep drawing packaging containers which concerns on the 3rd Embodiment of this invention. It is a top view which shows the product state of the deep-drawing packaging container shape|molded by the metal mold|die for deep-drawing packaging containers concerning 3rd Embodiment same as the above. It is sectional drawing which shows the structure of the metal mold|die for deep drawing packaging containers which concerns on the 4th Embodiment of this invention. It is sectional drawing which shows the structure of the metal mold|die for deep drawing packaging containers which concerns on the 5th Embodiment of this invention. It is explanatory drawing which shows the continuous packaging process of a deep-drawing packaging container product.

Hereinafter, the configuration of the first embodiment of the present invention will be described in detail with reference to FIGS. 1 to 4.

In FIG. 1 and FIG. 2, 11 is a deep-drawing packaged product, and this deep-drawing packaged product 11 is manufactured continuously while moving in a continuous packaging process as shown in FIG. The squeeze packaging container 12 is hermetically sealed in a state in which a gauze 13 as an article to be stored is stored.

The deep-drawing packaging container 12 includes a substantially rectangular box-shaped container body 14 that is opened upward and can accommodate the gauze 13, and a top film 15 that is bonded onto the container body 14. That is, the deep-drawing packaged product 11 is formed by sealing and closing the opening 16 of the container body 14 in which the gauze 13 is housed in a laminated state inside with the top film 15.

The container body 14, the front side portion 21 corresponding to the front side in the traveling direction during the continuous packaging process, the rear side portion 22 corresponding to the rear side in the traveling direction, and the side portion 23 corresponding to the side in the traveling direction, A bottom portion 24 is formed, and flange portions 25 projecting outward are integrally formed at upper end portions of the front side portion 21, the rear side portion 22, and the side portion 23.

Further, on the inner side surface of the front side portion 21 of the container body 14, a container-shaped container step portion 26 having a step-like shape in which the lower side projects inward with respect to the upper side is provided. That is, the front side portion 21 is provided with a container step portion 26 whose lower portion protrudes inward.

In the container body 14, the gauze 13 is laminated so that the gauze body 27 is arranged inside the rear side part 22, the container step part 26 and the side part 23 at a height corresponding to the container step part 26 from the bottom part 24. Then, the gauze 13 is laminated above the container step portion 26 so that the gauze bodies 27 are overlapped with each other in plan view.

Further, in the container body 14, the gauze warp 28 of the gauze 13 arranged up to the height corresponding to the container step 26 is in a state of being folded along the container step 26, and the gauze warp 28 causes the gauze The space between the main body 27 and the container step 26 is filled.

Then, with the gauze 13 accommodated in the container body 14, the top film 15 is adhered to the flange portion 25 and sealed.

When manufacturing such a deep-drawing packaged product 11, for example, it is manufactured by a continuous packaging process as shown in FIG.

Here, in the forming process of the deep-drawing packaging container 12 in the continuous packaging process, the deep-drawing packaging container mold 31 shown in FIGS. 3 and 4 is used.

The deep-drawing packaging container mold 31 includes a substantially rectangular box-shaped mold body 32 that is opened upward. That is, the mold body 32 is a front wall portion 33 corresponding to the front side in the traveling direction of the deep-drawing packaging container 12 manufactured in the continuous packaging process, a rear wall portion 34 corresponding to the rear side in the traveling direction, and a traveling direction. It has a lateral wall portion 35 located laterally with respect to and a bottom portion 36 that constitutes a bottom surface and is provided with a plurality of suction holes 37.

The front wall portion 33 is provided with a mold step portion 39 composed of a rectangular rod-shaped metal piece 38.

The metal piece 38 is arranged so as to close the suction hole 37 located closest to the front wall portion 33 side out of the plurality of suction holes 37 in the bottom portion 36, and the front wall portion is fixed by a fixing means (not shown) such as a magnet or a double-sided tape. It is fixed at 33.

In the mold step portion 39, the lower side (metal piece 38) is projected inward with respect to the upper side (front wall portion 33) by the front wall portion 33 and the metal piece 38 fixed to the front wall portion 33. It is configured in a stepped shape. That is, the front wall portion 33 is provided with a mold step portion 39 whose lower portion protrudes inward.

Further, in the mold step portion 39, for example, the height dimension A of the metal piece 38, which is a portion protruding inward, is 1/3 of the depth dimension of the mold body 32, that is, the height dimension B of the rear wall portion 34. (A/B=1/3).

Further, the mold step portion 39 is configured such that the width dimension of the metal piece 38, which is a portion protruding inward, that is, the protruding length C from the front wall portion 33 is, for example, 10 mm.

Next, the operation and effect of the first embodiment will be described.

When molding the deep-drawing packaging container 12 using the deep-drawing packaging container die 31, the resin bottom film that has been softened by being heated by heating vacuum forming is evacuated through the suction hole 37. By the above, it closely adheres to the mold body 32 so as to follow the internal shape of the mold body 32.

By cooling the bottom film in a state in which it is in close contact with the inside of the mold body 32, the bottom film is solidified in a shape corresponding to the internal shape of the mold body 32. That is, the container body 14 having a box shape opened upward and having the container step portion 26 provided on the front wall portion 33 is formed.

The gauze 13 is housed in the container body 14 by hand, for example, in a state where the container body 14 molded in this way is proceeding in a predetermined direction during the continuous packaging process.

The container body 14 and the top film 15 after accommodating the gauze 13 are introduced into the heat seal molding, and in a temporarily stopped state, the top film 15 is thermocompression-bonded to the flange portion 25 of the container body 14 and sealed.

Further, at the stage where the top film 15 is adhered and sealed to the container body 14, since the plurality of deep-drawing packaged products 11 are connected to each other at the thermocompression bonding portion, by cutting the thermocompression bonding portion, It will be an individual deep-draw packaged product 11.

Further, according to the deep-drawing packaging container 12, since the container step portion 26 is provided on the front side portion 21 which is one of the inner side surfaces of the container body 14, the gauze body 27 and the front wall portion of the container body 14 are provided. A space is unlikely to be created between the container main body 4 and the container 21, and the container step portion 26 is arranged in either of the advancing directions in the continuous packaging process, so that the container main body 4 advances in order to bond the top film 15 to the flange portion 25. Even if the container is temporarily stopped, the gauze body 27 is unlikely to move in the container body 14 due to the reaction or impact caused by the stop. Incidentally, above the container step portion 26 in the container body 14, because there is frictional resistance between the laminated gauze 13, it is difficult to move within the container body 14 like the gauze 13 of a height corresponding to the container step portion 26. The movement of the gauze body 27 in the container body 14 during the manufacturing process can be effectively prevented. Therefore, the gauze warp yarns 28 are less likely to be exposed to the outside of the container body 14 during the continuous packaging process, the defective adhesion between the container body 14 and the top film 15 can be effectively prevented, and the gauze 13 can be appropriately packaged.

Further, for example, in the case where the container step portion 26 is not provided, in order to prevent the movement of the gauze 13 in the container body 14 by setting the opening area of the container body 14 as small as possible to correspond to the area of the gauze body 27. This makes it difficult to store the gauze 13 in the container body 14. On the other hand, in the configuration in which the container step portion 26 projecting downward is provided, the opening area on the bottom 24 side where the container step portion 26 is provided is narrow, but the opening area above the container step portion 26 can be secured to be wide. Therefore, not only is it easy to physically store the gauze 13 in the container body 14, but it also leads to a psychological sense of security when it is manually stored, and the efficiency of the storage work can be improved.

According to the deep-drawing packaging container mold 31, since the mold body 32 has the mold step portion 39, the container body 14 having the container step portion 26 for appropriately packaging the gauze 13 can be easily manufactured. ..

Further, since the mold step portion 39 is constituted by the metal piece 38 which is separate from the mold body 32, the metal piece 38 is fixed to the conventional concave mold without incurring any cost or trouble. The mold step portion 39 can be formed in the mold.

Since the metal piece 38 is fixed to the container body 14 by a removable fixing means such as a magnet or a double-sided tape, the metal piece 38 can be removed or replaced as necessary, which is convenient.

Further, when the mold step portion 39 is constituted by the metal piece 38 which is separate from the mold body 32, the suction hole 37 located closest to the front wall portion 33 side on the bottom surface of the mold body 32 is formed into the metal piece. By closing with the 38, it is possible to prevent the bottom film from being drawn into the gap between the container body 14 and the metal piece 38 due to vacuuming when the container body 14 is molded.

In the above-described first embodiment, the article to be accommodated is the plain weave gauze, but the article to be accommodated in the deep-drawing packaging container 12 is not limited to the gauze 13, and may be, for example, a non-woven fabric product or the like. It is applicable as long as a part of the film 15 may be sandwiched when it is bonded.

The mold step portion 39 is provided on the front wall portion 33 of the mold body 32, and the container step portion 26 is provided on the front side portion 21 of the container body 14, but the configuration is not limited to such a configuration. The mold step 39 and the container step 26 may be provided on at least one of the front side and the rear side in the traveling direction in the continuous packaging process.

Further, the mold step portion 39 is not limited to the configuration formed by the metal piece 38 that is separate from the container body 14, and can be appropriately formed as long as the lower side projects inward with respect to the upper side. ..

That is, for example, as in the second embodiment shown in FIG. 5, the mold step portion 41 may be integrally formed on the inner surface of the mold body 32.

For example, in the above-described first embodiment, unless the positional relationship between the suction hole 37 and the metal piece 38 in the bottom portion 36 of the mold body 32 is set accurately, when the container body 14 is molded, The bottom film may be drawn between the metal pieces 38.

On the other hand, by forming the mold step portion 39 integrally with the mold body 32, when molding the container body 14, the bottom film easily follows the internal shape of the mold body 32. The accuracy of can be improved.

Further, as in the third embodiment shown in FIG. 6, for example, the mold step portion 43 may be constituted by a plurality of mold pieces 42 arranged along the front wall portion 33 and spaced from each other.

By arranging the metal pieces 42 apart from each other in this way, in the molded container body 14, as shown in FIG. 7, for example, the container step portions 44 are separated from each other, so that the gauze 13 is attached to the container body 14. It is easy for the worker who stores the container to visually recognize the container step portion 44, and the workability can be improved.

Further, as in the case of the fourth embodiment shown in FIG. 8, for example, the mold step portion 46 may be configured by the metal tray 45 that is internally mounted and fixed to the container body 14.

The metal dish 45 has a bottom portion 48 provided with a communication suction hole 47 that communicates with the suction hole 37 in a state of being fixed to the mold body 32. Further, an edge portion 49 is provided upright at the end portion of the bottom portion 48 on the front side in the traveling direction.

The metal dish 45 is installed so as to cover the entire bottom 36 of the mold body 32. Further, in the installed state, the edge portion 49 is formed such that the upper end portion thereof is substantially horizontal, and the edge portion 49 constitutes the mold step portion 46.

In this way, the step portion 49 is formed by the edge of the metal dish 45 that covers the entire bottom portion 36 of the mold body 32, so that in the molding process of the container body 4, the communication suction holes 37 of the metal dish 45 form the bottom film. Since the suction path can be regulated, the container body 14 can be molded more reliably.

Further, generally, a plurality of types of container bodies having different depths are prepared depending on the number of gauze 13 accommodated in the container body 14, and for example, in existing products, there are five types of container bodies having different depths.

Even when manufacturing a plurality of types of container bodies having different depths, for example, in the configuration using the metal dish 45, as shown in FIG. 9, the depth of the die body 32 is designed to be relatively deep. However, by installing a plurality of metal plates 52 having holes 51 between the bottom portion 36 of the mold body 32 and the metal dish 45, the efficiency can be improved by simply adjusting the number and thickness of the metal plates 52. A container body having a desired depth can be manufactured.

11 Deep-draw packaging products
12 deep-draw packaging
13 Gauze as an object to be stored
14 Container body
15 top film
26 Container step
31 Deep drawing packaging container mold
32 Mold body
33 Front wall
34 Rear wall
36 bottom
37 Suction hole
38 metal pieces
39 Mold step
41 Mold step
42 metal pieces
43 Mold step
44 Container step
45 metal dish
46 Mold step
47 Communication suction hole
48 bottom
49 edge

Claims (5)

In a mold for a deep-drawing packaging container for molding the container body when producing a deep-drawing packaged product in which the container body containing the articles to be housed is closed with a top film,
A front wall portion corresponding to the front side in the traveling direction of the container body in the manufacturing process of the deep-draw packaged product, a rear wall portion corresponding to the rear side in the traveling direction, and a bottom portion provided with a suction hole. , Equipped with a box-shaped mold body opened upward,
At least one of the front wall portion and the rear wall portion has a mold step portion whose lower portion protrudes inward. A mold for a deep-drawing packaging container, wherein: The mold die for a deep-drawing packaging container according to claim 1, wherein the mold step portion is constituted by a metal piece fixed in the mold body. A metal dish having a communication suction hole fixed in the mold body and communicating with the suction hole,
The mold for a deep-drawing packaging container according to claim 1, wherein the mold step portion is constituted by an edge portion of the metal dish. In the mold step portion, the height dimension of the inwardly projecting portion is 1/3 of the depth dimension of the die body, and the inwardly projecting portion has a width dimension of 10 mm. Item 1. A mold for a deep-drawing packaging container according to any one of items 1 to 3. In a deep-drawing packaging container comprising a container body capable of accommodating an article to be accommodated and a top film closing the container body,
The container body is provided with a container step portion having a lower part protruding inwardly on at least a part of an inner side surface thereof.

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