JPH06198770A - Container material and production thereof - Google Patents

Abstract

(57) [Summary] [Purpose] Bending at the bending groove can be done easily. The side pieces can be folded close to 90 ° with respect to the bottom piece. No cracks occur in the bent part. [Structure] Bending line groove forming cutter blades 5 are arranged on both sides of the Thomson blade 3 to form the bending line groove forming cutter blades 5.
The lower end of is located slightly above the lower end of the Thomson blade 3. The upper surface of the foamed synthetic resin sheet is pressed by the Thomson blade 3 to form the fold groove 4 for bending, and the fold line groove forming cutter blades 5 arranged on both sides of the Thomson blade 3 are provided on both sides of the fold groove 4 for bending. Along the bottom of the foamed synthetic resin sheet 1, the outer skin portion is left and the groove 6 is bent from above.
To form.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a manufacturing method for forming a material for a prefabricated container for storing foods and the like.

[0002]

2. Description of the Related Art Assembled containers for storing foods such as sashimi, sweets and sushi have been known. And, in the past, a foamed synthetic resin sheet 1 such as foamed styrene was cut by a cutter blade 2 for cutting the outer periphery into a developed shape of a container and cut out, and a bent portion for bending the expanded shape into a container shape. The container material B was manufactured by pressing the corresponding part with the Thomson blade 3 to form the groove 4 for bending. Then, the container material B cut into the expanded shape of the container has a concave groove 4 for bending.
The part is bent, and the adjacent side edges of the bent side piece 9 are fixed by heat fusion to form a box-shaped container C.

[0003]

Here, in the prior art, the Thomson blade 2 presses the portion corresponding to the bent portion of the foamed synthetic resin sheet 1 in the order of FIGS. 6 (a), 6 (b) and 6 (c). When the folding groove 4 for bending is formed, first, the foamed synthetic resin sheet 1 is deeply pressed by the Thomson blade 3 as shown in FIG. 6B to form the deep groove 4 for bending. When the blade 3 is pulled up, it is restored from the state of the broken line in FIG. 6 (c) to the state of the solid line by the elastic restoring force of the foamed synthetic resin and the bending groove 4 becomes shallow, but in this case, the bending groove is formed. Since the elastic restoring forces on the wall portions on both sides of the groove 4 pull it in the direction of the arrow in FIG. 6C, the groove 4 for bending becomes shallower, and as a result, it is attempted to bend at the groove 4 for bending. If you do, the groove 4 for bending
Due to the shallowness of the portion and the elastic restoring force of both walls of the bending groove 4 for bending, it is difficult to bend, for example, the bottom piece 8
On the other hand, it is difficult to bend the side piece 9 up to nearly 90 °, and if it is forcibly bent, a crack is generated in the bent portion, and when bent, a large elastic restoring force is accumulated in the bent portion, and the side piece 9 is assembled into a container shape. In this case, as shown in FIG. 8, there is a problem that the central portion of the side piece 9 of the container C may expand outward and be deformed into a so-called drum shape.

The present invention has been made in view of the above-mentioned problems of the conventional example, and an object thereof is to easily bend a bending groove portion, and moreover, to make a side piece with respect to a bottom piece 90. There is a need for a method of manufacturing a container material that can be bent close to each other and that does not crack at the bent portion.

[0005]

According to the method for producing a container material of the present invention, a foamed synthetic resin sheet 1 is cut with a cutter blade 2 for cutting the outer periphery into a container-deformed shape and cut out, and the expanded shape is made into a container shape. In the case where the Thomson blade 3 presses a portion corresponding to a bent portion for bending to form the folding groove groove 4, the folding line groove forming cutter blades 5 are arranged on both sides of the Thomson blade 3 and the folding line groove is formed. The lower end of the forming cutter blade 5 is located slightly above the lower end of the Thomson blade 3, and the Thomson blade 3 presses the upper surface of the foamed synthetic resin sheet to form the folding groove groove 4 and the Thomson blade 3 The folding line groove forming cutter blades 5 arranged on both sides along the both sides of the folding groove groove 4 leave the outer skin portion of the lower surface of the foamed synthetic resin sheet 1 from above and bend line grooves 6 from above. It be characterized in forming, by adopting such a method, it is obtained by achieving the object of the present invention to solve the problems of the conventional example described above.

[0006]

According to the present invention of the above method, however, the folding line groove forming cutter blades 5 are arranged on both sides of the Thomson blade 3 and the lower end of the folding line groove forming cutter blade 5 is placed at the Thomson blade 3 side. Bending line groove forming cutter positioned slightly above the lower end of the Thomson blade 3 to press the upper surface of the foamed synthetic resin sheet 1 with the Thomson blade 3 to form the groove groove 4 for bending By forming the folding line groove 6 from above along the both sides of the folding groove 4 by the blade 5 while leaving the outer skin portion of the lower surface of the foamed synthetic resin sheet 1, bending is performed when the pressing by the Thomson blade 3 is released. The groove portion 4 for use is restored by the elastic restoring force of the foamed synthetic resin. In this case, the edges of the wall portion on both sides of the groove portion 4 for bending are cut off by the bend line grooves 6, so both sides are cut. Wall side Since the pulling force is eliminated, the groove depth of the folding groove groove 4 for bending can be made deeper than in the past, and as a result, the groove depth of the groove groove 4 for bending can be made deeper, and the groove depth of both sides of the groove groove 4 for bending can be increased. The presence of the fold line groove 6 facilitates the fold, and makes it possible to fold near 90 °.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the embodiments shown in the accompanying drawings. In FIG. 1, A is a cutting press device used in the present invention, which is a cutter blade 2 for cutting the outer circumference for cutting the foamed synthetic resin sheet 1 into the expanded shape of the container and cutting it.
And a Thomson blade 3 for forming a groove 4 for bending by pressing a portion corresponding to a bent portion for bending an expanded shape of the container into a container shape, and a Thomson blade 3 disposed on both sides of the Thomson blade 3 for bending Bent line grooves 6 on both sides of the groove 4
And a cutter blade 5 for forming a bent line groove for forming a groove. Here, the lower end of the bent line groove forming cutter blade 5 is located slightly above the lower end of the Thomson blade 3. Also, a cutter blade 2 for cutting the outer circumference
Is located below the lower end of the Thomson blade 3.

Then, the foaming synthetic resin sheet 1 such as foamed styrene is cut by the cutting press device A as shown in FIG.
(A) (b) (c) in the order of cutting and pressing, container material B
Is manufactured. That is, when the cutting press device A is lowered, as shown in FIG. 1B, the outer peripheral cutting cutter blade 2 completely cuts the container into a developed shape, and the Thomson blade 3 presses the foamed synthetic resin sheet 1 for bending. The groove groove 4 is formed, and at the same time, the bending line groove forming cutter blades 5 located on both sides of the Thomson blade 3 form the bending line groove 6 on both sides of the bending groove groove 4 to form the bending groove groove 4. The edges are cut off from both side walls. In this case, since the lower end of the bending line groove forming cutter blade 5 is located slightly above the lower end of the Thomson blade 3, the bending line groove forming cutter blade 5 causes the outer skin 7 of the lower surface of the foamed synthetic resin sheet 1 to move. Only the part before the part is cut, and the part of the outer skin 7 is left uncut. By the way, since the synthetic resin sheet 1 such as foamed styrene is in contact with the mold when it is formed by extrusion molding, the outer surface side is less likely to be foamed than the inside, and therefore the skin layer is inevitably denser than the inside. The outer skin 7 is formed. Then, according to the present invention, the cutter blade 5 for forming the bent line groove is formed.
Even if the bent line groove is formed with, the outer skin 7, which is the dense skin layer, remains on the lower surface side. And FIG. 1 (a)
1 from the state shown in FIG.
In the state of (b), the bending concave groove 4 portion is restored to a certain degree upward by the elastic restoring force of the foam synthetic resin as a material. In this case, the wall portions on both sides of the bending concave groove 4 portion are restored. Since the edge is cut by the bent line groove 6, the force to be pulled toward the wall portions on both sides is eliminated.
Therefore, the groove depth of the bending groove 4 for bending can be made deeper than in the conventional case shown in FIG. 6 (c).

As described above, the container material B cut into the expanded shape of the container as shown in FIG. 2 is manufactured.
The container material B cut into the expanded shape of the container manufactured in this way is obtained by bending the side piece 9 with respect to the bottom piece 8 at the folding groove 4 for bending, and adjoining side edges of the bent side piece 9. The containers are fixed by heat fusion to form a box-shaped container C as shown in FIG. In this case, since the groove depth of the bending groove 4 can be made deeper and the bending line grooves 6 on both sides of the bending groove 4 can be bent more easily than in the conventional case. You can do it. In addition, there is no problem even if it is bent near 90 °, and cracks do not occur in the bent portion.

In the embodiment shown in FIG. 2, an example of the container material B without the lid piece is shown, but the lid piece 10 as shown in FIG.
A container material B having a series of can be manufactured in the same manner. In this case as well, in the bent portion between the side piece 9 and the lid piece 10, similarly to the bent portion between the bottom piece 8 and the side piece 9, the bending groove 4 for bending and the bending line groove 6 on both sides of the groove 4 for bending are formed. Are formed. FIG. 5 is a drawing in which the container material B with such a lid piece 10 is assembled to form a container C. Further, in cutting the foamed synthetic resin sheet 1 into the expanded shape of the container, it is needless to say that the expanded shape is not limited to the expanded shapes shown in FIGS. In addition, when the container material 1 is assembled into a container, the side piece 9
In the case of connecting the side edges of the above, an example of heat fusion is shown, but they may be connected by a fixing means other than heat fusion.

[0011]

According to the present invention, as described above, the bending line groove forming cutter blades are arranged on both sides of the Thomson blade, and the lower end of the bending line groove forming cutter blade is slightly smaller than the lower end of the Thomson blade. The upper side of the foamed synthetic resin sheet with the Thomson blade to form the fold groove for bending, and the fold line groove forming cutter blades arranged on both sides of the Thomson blade on both sides of the fold groove for bending. A fold line groove is formed from above, leaving the outer skin part of the foamed synthetic resin sheet along, so that when the pressure from the Thomson blade is released, the fold groove for bending is restored by the elastic restoring force of the foamed synthetic resin. However, in this case, since the edges are cut by the bending line grooves from the wall portions on both sides of the concave groove portion for bending, the force pulled to the wall portions on both sides is eliminated,
The groove depth of the folding groove groove can be made deeper than before, and as a result, the groove depth of the bending groove groove can be made deeper and the bending line grooves on both sides of the bending groove groove facilitate bending. In addition, the elastic restoring force accumulated inside when bent is not so large as in the past and cracks occur in the bent part, or the central part of the bent side piece. However, there is no fear that the container will become drum-shaped when it spreads outward.

[Brief description of drawings]

1A, 1B, and 1C are cross-sectional views showing the manufacturing sequence of the present invention.

FIG. 2 is a plan view of a container material manufactured according to the present invention.

FIG. 3 is a perspective view of a container formed by assembling the above-mentioned container material.

FIG. 4 is a plan view of a container material according to another embodiment.

FIG. 5 is a perspective view of a container formed by assembling the above-mentioned container material.

6A, 6B, and 6C are cross-sectional views showing the manufacturing sequence of a conventional example.

FIG. 7 is a plan view of a conventional container material.

FIG. 8 is a plan view of a container formed by assembling conventional container materials.

[Explanation of symbols]

 1 Foam Synthetic Resin Sheet 2 Cutter Blade for Cutting Outer Edge 3 Thomson Blade 4 Recessed Groove Groove 5 Cutter Blade for Bending Line Groove Formation 6 Bending Line Groove

[Procedure amendment]

[Submission date] September 24, 1992

[Procedure Amendment 2]

[Document name to be amended] Statement

[Name of item to be amended] Claims

[Correction method] Change

[Correction content]

[Claims]

[Procedure 3]

[Document name to be amended] Statement

[Correction target item name] 0001

[Correction method] Change

[Correction content]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a prefabricated container material for storing foods and the like and a manufacturing method for forming the prefabricated container material .

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0004

[Correction method] Change

[Correction content]

The present invention has been made in view of the above-mentioned problems of the conventional example, and an object thereof is to easily bend a bending groove portion, and moreover, to make a side piece with respect to a bottom piece 90. ° Container material that can be bent near and that does not crack at the bent part
To provide a manufacturing method thereof.

[Procedure Amendment 5]

[Document name to be amended] Statement

[Name of item to be corrected] 0005

[Correction method] Change

[Correction content]

[0005]

[Means for Solving the Problems] The container material of the present invention is a container
Sheet 1 having elastic restoring force cut and formed in the unfolded state
Corresponds to the bent part for bending into the container shape
A groove 4 for bending is formed at a place, and a groove for bending is formed.
Of the lower surface of the sheet 1 having elastic restoring force along both sides of
Form the bent line groove 6 from above, leaving the outer skin.
It is characterized by that . Further, the manufacturing method of the container material according to the present invention includes a bent portion for cutting the foamed synthetic resin sheet 1 with the cutter blade 2 for cutting the outer periphery into a container-developed shape and cutting it and bending the expanded shape into the container-shaped shape. In which the bending groove groove 4 is formed by pressing the portion corresponding to the above with the Thomson blade 3, the bending line groove forming cutter blades 5 are arranged on both sides of the Thomson blade 3 and the bending line groove forming cutter blade 5 is formed. The lower end of the Thomson blade 3 slightly above the lower end of the Thomson blade 3
To press the upper surface of the foamed synthetic resin sheet to form the concave groove 4 for bending, and to foam along the both sides of the concave groove 4 for bending by the cutter blades 5 for forming the bending line groove arranged on both sides of the Thomson blade 3. It is characterized in that the folding line groove 6 is formed from above with the outer skin portion of the lower surface of the synthetic resin sheet 1 left .

[Procedure correction 6]

[Document name to be amended] Statement

[Correction target item name] 0006

[Correction method] Change

[Correction content]

[0006]

According to the present invention of the above method, however, the container material is elastically restored by being cut and formed in the expanded state of the container.
Folding to fold the sheet 1 with force into a container shape
Forming concave groove 4 for bending at a position corresponding to the bent portion
And has elastic restoring force along both sides of the groove 4 for bending.
Fold from above, leaving the outer skin of the lower surface of the seat 1
Since the barbed groove 6 is formed, the groove of the concave groove 4 for bending is formed.
Being able to increase the depth and folding both sides of the groove 4 for bending
The presence of the bend line groove 6 facilitates bending, and
Can be bent near 90 °. And of the present invention
According to the manufacturing method, the bending line groove forming cutter blades 5 are arranged on both sides of the Thomson blade 3 and the lower end of the bending line groove forming cutter blade 5 is positioned slightly above the lower end of the Thomson blade 3, The upper surface portion of the foamed synthetic resin sheet 1 is pressed by the blade 3 to form the fold groove 4 for bending, and the fold groove groove forming cutter blades 5 arranged on both sides of the Thomson blade 3 are provided on both sides of the fold groove 4 for bending. By forming the folding line groove 6 from above while leaving the outer skin portion of the lower surface of the foamed synthetic resin sheet 1 along, when the pressing by the Thomson blade 3 is released, the bending groove 4 portion for bending has elasticity of the foamed synthetic resin. Although it is restored by the restoring force, in this case, since the edges are cut by the folding line grooves 6 from the wall portions on both sides of the concave groove 4 for bending, the force to be pulled toward the wall portions on both sides is eliminated, and the conventional compared to Since the groove depth of the folding groove groove 4 can be deepened, and as a result, the groove depth of the bending groove groove 4 can be deepened and the bending line grooves 6 on both sides of the bending groove groove 4 facilitate bending. In addition, it can be bent at almost 90 °.

[Procedure Amendment 7]

[Document name to be amended] Statement

[Correction target item name] 0007

[Correction method] Change

[Correction content]

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the embodiments shown in the accompanying drawings. In FIG. 1, A is a cutting press device used in the present invention, and has a sheet 1 (hereinafter referred to as foam
A cutter blade 2 for cutting the outer circumference for cutting the rigid resin sheet 1 as an example) by cutting it into the expanded shape of the container.
And a Thomson blade 3 for forming a groove 4 for bending by pressing a portion corresponding to a bent portion for bending an expanded shape of the container into a container shape, and a Thomson blade 3 disposed on both sides of the Thomson blade 3 for bending Bent line grooves 6 on both sides of the groove 4
And a cutter blade 5 for forming a bent line groove for forming a groove. Here, the lower end of the bent line groove forming cutter blade 5 is located slightly above the lower end of the Thomson blade 3. Also, a cutter blade 2 for cutting the outer circumference
Is located below the lower end of the Thomson blade 3.

[Procedure Amendment 8]

[Document name to be amended] Statement

[Correction target item name] 0010

[Correction method] Change

[Correction content]

In the embodiment shown in FIG. 2, an example of the container material B without the lid piece is shown, but the lid piece 10 as shown in FIG.
A container material B having a series of can be manufactured in the same manner. In this case as well, in the bent portion between the side piece 9 and the lid piece 10, similarly to the bent portion between the bottom piece 8 and the side piece 9, the bending groove 4 for bending and the bending line groove 6 on both sides of the groove 4 for bending are formed. Are formed. FIG. 5 is a drawing in which the container material B with such a lid piece 10 is assembled to form a container C. Further, in cutting the foamed synthetic resin sheet 1 into the expanded shape of the container, it is needless to say that the expanded shape is not limited to the expanded shapes shown in FIGS. Also, when the container material B is assembled into the container, the side piece 9
In the case of connecting the side edges of the above, an example of heat fusion is shown, but they may be connected by a fixing means other than heat fusion.

[Procedure Amendment 9]

[Document name to be amended] Statement

[Correction target item name] 0011

[Correction method] Change

[Correction content]

[0011]

As described above, the container material of the present invention is easy to use.
The container material has an elastic restoring force that is cut and formed in the expanded shape of the container.
Bent part to fold the sheet into a container shape
Form a groove for bending in the area corresponding to
Under the sheet with elastic restoring force along both sides of the groove
Form a bent line groove from above leaving the outer skin part of the surface
Since there is, it is possible to increase the groove depth of the groove for bending
And the existence of fold line grooves on both sides of the groove for bending
Easy to fold, and can be bent near 90 °
Is something that can be done. Also, a method of manufacturing the container material of the present invention
As described above, the method is to arrange the cutter blades for forming the bent line groove on both sides of the Thomson blade as described above, and to position the lower end of the cutter blade for forming the bent line groove slightly above the lower end of the Thomson blade, and foam with the Thomson blade. The upper surface of the synthetic resin sheet is pressed to form the concave groove for bending, and the cutter blades for forming the folding line grooves arranged on both sides of the Thomson blade along the both sides of the concave groove for bending form the lower surface of the foamed synthetic resin sheet. Since the bent line groove is formed from above leaving the outer skin part,
When the pressing by the Thomson blade is released, the bending groove for bending is restored by the elastic restoring force of the foam synthetic resin,
In this case, since the edges are cut off by the folding line grooves from the wall portions on both sides of the folding groove groove portion for bending, the force drawn to the wall portion side on both sides is eliminated, and the groove groove portion for bending of The groove depth can be increased, and as a result, the groove depth of the bending groove groove can be increased and the bending line grooves on both sides of the bending groove groove can be easily bent.
° It can be bent near, and when it is bent, the elastic restoring force that is accumulated inside is not as large as it used to be and cracks occur in the bent part, or the center part of the bent side piece spreads outward. There is no fear that the container will become drum-shaped.

Claims (1)

[Claims] 1. A foamed synthetic resin sheet is cut with a cutter blade for cutting the outer periphery into an expanded shape of a container and cut out, and a portion corresponding to a bent portion for bending the expanded shape into a container shape is pressed with a Thomson blade. In forming the concave groove for bending, the bending line groove forming cutter blade is arranged on both sides of the Thomson blade and the lower end of the bending line groove forming cutter blade is positioned slightly above the lower end of the Thomson blade, A Thomson blade presses the upper surface of the foamed synthetic resin sheet to form a groove for bending, and a cutter blade for forming a folding line groove arranged on both sides of the Thomson blade expands the synthetic resin along both sides of the groove for bending. A method for manufacturing a container material, characterized in that a folding line groove is formed from above while leaving the outer skin portion of the lower surface of the sheet.