JP2005255181A - Longitudinally expandable pet bottle, and method and device for manufacturing the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a PET bottle in which the longitudinal width (height) is substantially reduced compared with that when the content is filled in a bottle body when manufacturing the bottle body, and to provide a method and a device for manufacturing the same. <P>SOLUTION: In a bottle body in which a part or the entire part thereof in the longitudinal direction is formed in a bellows in a horizontal direction except the longitudinal width of a mouth part at an upper end, a bottle is formed in a state of substantially reduced volume and height compared with the volume and the height when the content is filled in its manufacturing step, and when a void part is formed in the bottle body by the action such as drinking off the content, the volume and the height become substantially reduced again than the volume and the height of the bottle when the content is filled. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

The present invention is mainly used to form a container for juice or mineral water by using a blow molding method called stretch blow or injection blow, generally called pet resin blow, etc. The present invention relates to a plastic bottle, a manufacturing method thereof, and a manufacturing apparatus, which are different in height when being used and when empty.

  The production amount of synthetic resin bottles has become enormous in recent years.

However, when drinking the juice or mineral water in the container body and destroying the container body, it is the shape of the bottle before it is drunk, and when discarding it in a so-called trash box, it is as if the air was thrown into the trash box The biggest drawback is that it is discarded on the street and worsens the living environment.In addition, the cost of collecting the drunk container itself and the labor cost for cleaning are a major burden on public works. It has become.

  This kind of synthetic resin bottle can be manufactured by simple means such as blow molding, but it is still strong enough for automobiles and other transportation means with intense vibrations, and displays at stores that are stacked. There was no one.

  In addition, when transporting from a container manufacturer to a company that encloses juice or mineral water, it costs the product to be transported with the container body bulky and carrying air. The proportion was considerable.

Therefore, the inventor of the present application has provided a liquid container devised so that the container can be easily reduced when collecting the waste of the liquid container.

This is made of a relatively soft synthetic resin and has a bellows shape around the liquid container body having a mouth at the upper end. (See Patent Document 1)

In addition to this, by applying a load in the vertical direction and / or torsional direction of the container body, the volume is substantially reduced, and means for holding the reduced shape and the container body Proposed the invention (see Patent Document 2).

As a result, all of the above-mentioned purposes, that is, the height of the container body when it was crushed, and the container could be sufficiently reduced and kept in that state.

In the conventional PET bottle manufacturing means, a so-called biaxial stretch blow molding method using a preform is mainly used.

For example, there is an invention (see Patent Document 3) in which the opening and closing operation of a pair of molds into which the preform can be inserted is performed by a ring and a rotating disk that are axially rotated by 180 °. There were no inventions for a new excellent mold for manufacturing the bellows and each of the saddles constituting the bellows and a method for manufacturing the same.

However, a preform, which is a primary molded product that has been molded into a predetermined shape in advance, is biaxially stretched and blow molded by a primary blow molding die to form a primary intermediate molded product, and the primary intermediate molded product is heat-treated to obtain a secondary product. The intermediate molded product is forcibly deformed by heat shrinkage, and the secondary intermediate molded product is subjected to secondary blow molding with a secondary blow molding die in a casing or other container with almost no stretching deformation compared to the primary blow. The invention is publicly known (see Patent Document 4), but this is for obtaining a container having heat resistance against extremely high heat shrinkage, and of course, it is not a mold or method for producing a bellows-shaped container as described above. .

JP2001-213418 (abstract) JP2002-68156 (Abstract) JP 11-48327 (pages 3 and 4) Patent No. 2777790 (2 pages)

In general, the object of the present invention is to manufacture a plastic bottle whose vertical width (height) is substantially reduced when the container body is manufactured, as compared to when the container body is filled with contents. It is to propose and provide a method and a manufacturing apparatus.

Another object is to propose and provide a PET bottle, a manufacturing method thereof, and a manufacturing apparatus which become a container body having a normal capacity and a vertical width when the container body is filled with mineral water or juice.

Another object of the present invention is to make a plastic bottle that can reduce the volume (vertical width) of the container body when the juice or mineral water in the container body is drunk up and discarded. And advocate and provide manufacturing equipment.

Another object of the present invention is to propose and provide a PET bottle having a shape that is easy to hold the container body and does not slide down even if condensation occurs on the surface thereof, a manufacturing method thereof, and a manufacturing apparatus. In particular, another object of the present invention is to reduce the vertical width of an empty portion in the middle of drinking the contents of the container body.

Another object of the present invention is that empty containers that have been drunk are thrown away in the state of the vertical width (height) as they are, and compared to the case where the trash can becomes full and can no longer be accommodated, Compared to conventional products, this means that the empty container body can be transported in large quantities at the same time, which greatly reduces labor costs for recovery and cleaning. Is to be able to.

Further, such a mold is suitable for manufacturing a large amount of such a container main body, and the formation of each bellows constituting the bellows portion and each bellows is reliable, and as a result, when the container main body is crushed, the crushed state It was possible to provide a device by advocating a plastic bottle and a method for manufacturing the same that can maintain the above.

  Therefore, in order to achieve the object of the present invention, the invention of claim 1 is a container main body in which a part or all of the vertical direction is a horizontal bellows shape except for the vertical width of the mouth of the upper end. In the manufacturing process, the container is molded in a state that is substantially smaller in volume and lower than the volume / height when the contents are filled, and that the contents are drunk. A plastic bottle capable of expanding and contracting in the vertical direction, characterized in that when a blank portion is formed in the main body, the volume and height can be substantially lower than when the contents are filled again.

  Further, the invention of claim 2 is a process of molding a container body in which a part or all of the vertical direction is a horizontal bellows shape, excluding the vertical width of the mouth portion at the upper end, and the molding It is a manufacturing method of a PET bottle capable of expanding and contracting in the vertical direction, characterized by comprising a step of performing a molding process for compressing the container body in the vertical direction and maintaining the compressed state at room temperature.

  According to a third aspect of the present invention, there is provided a mold for molding a container body in which a part or all of the vertical direction is a horizontal bellows shape, excluding the vertical width of the mouth portion at the upper end portion, and the molding. It is a manufacturing apparatus of a PET bottle that can expand and contract in the vertical direction, comprising a compression molding mechanism that compresses the container body in the vertical direction.

  Further, in the invention of claim 4, the bellows-like shape of the container main body shown in claim 1 can be expanded and contracted in the longitudinal direction, characterized in that the upper side is an arc shape protruding upward and the lower side is a linear shape. It is a plastic bottle.

  In forming the bellows-like shape of the container body shown in claim 2 above, the bellows-like shape is an arc shape with the upper side protruding upward, and the lower side has a linear shape. It is the manufacturing method of the plastic bottle which can extend-contract characterized by the vertical direction.

  The invention of claim 6 is the mold for molding the container body shown in claim 3 above, wherein the mold part forming the bellows shape is an arc shape with the upper side protruding upward, and the lower side is a linear shape It is the manufacturing apparatus of the plastic bottle which can extend / contract the vertical direction characterized by becoming.

  According to the seventh aspect of the present invention, in the process of molding the container body shown in the second or fifth aspect, a preform is automatically supplied into the mold, and a bellows-like shape is formed by high-pressure air of about 40 kg. It is a manufacturing method of a PET bottle that can expand and contract in the vertical direction, characterized by molding a container body.

The invention according to claim 8 is the compression molding mechanism according to claim 3 or 6, wherein the mechanism for placing the bellows-like container body in the vertical direction and the mechanism for compressing the container body in the vertical direction are provided. It is the manufacturing apparatus of the plastic bottle which can be expanded-contracted the vertical direction provided.

  The invention of claim 9 is a mechanism for vertically placing the container body shown in claim 3 or 6 and 8, wherein the mechanism for chucking the drinking mouth portion is arranged so that the drinking mouth portion of the container body is located downward. It is the manufacturing apparatus of the plastic bottle which can be expanded-contracted the vertical direction characterized by providing in the apparatus main body.

  According to a tenth aspect of the present invention, the mechanism for compressing the container main body in the vertical direction in the compression molding mechanism for the container main body according to the third or sixth or eighth aspect described above is operated by a fluid pressure and is provided by a piston and cylinder mechanism provided in the apparatus main body. An apparatus for producing a plastic bottle capable of expanding and contracting in the vertical direction, which is formed by pressing the container body from the bottom of the container body toward the drinking mouth.

  In the process of molding the container main body shown in the second or fifth and seventh aspects, the molded container main body is compressed in the longitudinal direction, and the bellows-like portion of the container main body is When pressed from one or both of the longitudinal directions toward the center of the container body, the accordion-like portion can be kept in a state of being overlapped and crushed. It is a manufacturing method of a PET bottle.

  According to a twelfth aspect of the present invention, the container body in a collapsed state in which the bellows-like portions overlap each other obtained in the second or fifth, seventh, and eleventh aspects is filled in the container body in the state of the ridge. The contents are transported to a filling factory where the contents of the container are sent to inflate before the contents are filled and inflated, or the container body is restored to its original crushed state with the pressure to fill the contents. The manufacturing method of the plastic bottle which can extend-contract the vertical direction characterized by having a process.

  According to a thirteenth aspect of the present invention, the step of compressing the container main body according to the second or fifth, seventh, or tenth aspect is performed while sucking air in the main body of the container. It is a manufacturing method.

Thus, a feature of the present invention is a container body in which a part or all of the vertical direction is a horizontal bellows shape, excluding the vertical width of the mouth of the upper end, and in the manufacturing process thereof, A PET bottle molded in a state substantially lower than the vertical width (height volume) when the contents are filled, and when the PET bottle is transported from the manufacturing factory to the factory filling the contents Since the vertical width (height and volume) is substantially reduced, the amount can be increased more than the conventional transport amount.
Further, the PET bottle of the present invention has a bellows-like outer periphery, so that it is easy to hold and there is no fear of slipping even if condensation occurs.

As another feature of the present invention, when a blank portion is formed in the container body by an operation such as drinking the contents, the height is substantially smaller and lower than the vertical axis when the contents are filled again. It is to be able to be in the state of.
As a result, even if a so-called “leftover” occurs in this plastic bottle, it can be carried in a bag such as a handbag. Because it is reduced in height and then thrown away into a trash can, the trash can fills up quickly as before, and the collection and transport operations that carry air are dramatically expanded.

As a feature of the manufacturing method of the plastic bottle of the present invention, a process of molding a container body in which a part or all of the vertical direction is a horizontal bellows shape, excluding the vertical width of the mouth part of the upper end part, The above-described excellent and effective PET bottle could be obtained by a simple method comprising a step of performing a molding process for compressing the molded container body in the vertical direction and maintaining the compression state at room temperature. There is.

Further, the PET bottle manufacturing apparatus of the present invention is characterized by a mold for molding a container body in which a part or all of the vertical direction is a horizontal bellows shape, excluding the vertical width of the mouth portion at the upper end. The apparatus with a simple structure comprising a compression molding mechanism for compressing the molded container body in the vertical direction was able to produce a large amount of PET bottles having excellent effects as described above at a low cost. .

In addition, the bellows-like shape of the container body described above is also a feature of the present invention that the upper side is an arc shape protruding upward and the lower side is a linear shape. As a result of repeated experiments, it was found that it was possible to maintain a crushed state during transportation and disposal.

Another characteristic of the process of molding the container body is that a preform is automatically supplied into the mold and a bellows-like container body is molded with high-pressure air of about 40 kg. Thus, when the PET bottle of the present invention is transported from the molding factory to the filling factory of the contents, it is stretched again at the filling factory, the volume is expanded, and the contents are further swallowed. Even with the operation of reducing the volume only, and the expansion and contraction operation of completely crushing and discarding, it was possible to generate a PET bottle without the risk of cracking, tearing or bending of the PET bottle It is.
Thus, the compression molding mechanism for transporting a large amount of unused PET bottles from the molding factory to the content filling factory is a mechanism for placing the container body in the shape of the bellows in the vertical direction, It is optimal to use a manufacturing apparatus equipped with a mechanism for compressing the container body in the vertical direction. Specifically, it is operated from the bottom of the container body by a piston and cylinder mechanism which is operated by fluid pressure and is provided in the apparatus body. This is done by pressing the container body in the mouth direction, which is also a feature of the present invention.

In addition, the mechanism for placing the container body in the vertical direction is also characterized in that the apparatus body is provided with a mechanism for chucking the mouth part so that the mouth part of the container body is positioned downward. .

Further, in the process of molding the container body, the molded container body is compressed in the vertical direction, and the bellows-like portion of the container body is pressed from one or both of the longitudinal directions toward the center of the container body. The accordion-like portion can be kept in an overlapped and crushed state, and the crushed container body in which the accordion-like portion overlaps the It is transported to the filling plant for the contents to be filled in the main body, and before the contents are filled, the original state before the container body is crushed by inflating with air before filling the contents or by filling the contents It is also characterized by having a process to restore it, and as a result, it has been in this type of container in the past, and when it is transported from the molding factory to the content filling factory, it seems that the soot also carries air and is empty. Nina When throwing away the container body, it is bulky and the trash can fills up quickly, and when it is transported to a recycling plant, the absolute amount is limited. In this invention, the container body can be crushed. As a result, the transport amount and the capacity of the trash can can be dramatically increased.

It has been found that the process of compressing the container body is easy and reliable if the process is performed while sucking air in the container body.

The overall shape of the container body in the present invention is appropriately selected from a cylinder including an ellipse, a prism including a rectangle, a cone and pyramid including a wharf, a drum (HOURGLASS DRAM-SHAPED), and a barrel. The horizontal cross-sectional shape of the container body is appropriately selected from a round shape including an ellipse and a square shape including a rectangle. Also, a label on which the contents of the container contents and a trademark are printed is wound around the outer periphery of the container body. It is considered that it is also within the technical scope of the present invention that it can be used as a means for manufacturing a container that can be loaded.

  Further, the present invention has other excellent objects, features, and effects, which will be clarified in the description of the following examples.

In the figure, (1) is a container body obtained by the production method of the present invention, and that in FIG. 1 is taken out from the mold body (16) for molding the container body (1), that is, its volume height ( L) is equivalent to that when the container body (1) is filled with the contents.
2 is a state after the molding process by the molding mechanism (18) for compressing the container body (1) in the vertical direction, that is, the volume height (L) ′ is empty. The volume height can be reduced to about 1/2 to 1/10 from the (L) ′ state. Hereinafter, in describing embodiments of the present invention with reference to the drawings, first, understanding the structure and operational effects of the container body (1) itself will facilitate understanding of the features of the present invention, and will be described. .

That is, the container main body (1) shown in FIG. 1 remains in the state of being taken out from the manufacturing mold, and the outer circumference and the inner part in the height (L) [length] direction excluding the upper drinking mouth part. The circumference is a bellows shape (2). At this time, the height (L) of the plastic bottle body (1) is a volume of 500 ml when the contents are filled.
More specifically, the container body (1) shown in FIG. 1 has a height of 195 mm, a maximum diameter of 71.5 mm, a capacity of 500 ml, and a shape having 12-stage bellows-like (2) ridges.
In the figure, (3) is the mouth part of the drinking mouth, and (4) is the back part extending from this mouth part to the first bellows shape (5).

Thus, in this embodiment, the outer diameter of the first step bellows (5) is 30.25 mm, and the outer diameter of the second step bellows (6) is 33.95 mm. The inner diameter between (5) and the second stage bellows (6) was 47 mm.

Similarly, the outer diameter of the third stage bellows (7) is 34.85 mm, and the inner diameter between the second stage bellows (6) and the third stage bellows (7) is 51.1 mm. It was.

Further, in FIG. 9, the outer diameter of the fourth stage bellows shape (8) is 35.75 mm, which is the maximum outer diameter of the container body (1), and the third stage bellows shape (7) and the fourth stage The inner diameter between the bellows shapes (8) was 54.5 mm.

Further, the outer diameters of the following fifth to twelfth bellows are the same as the outer diameter of the fourth bellows (8), and the inner diameter between them is also the third bellows (7). ) And the fourth stage bellows (8).

In this case, each kite has a shape like an unidentified flying object (UFO) called an Adamski type, and is thus divided into two parts in the horizontal direction.

At this time, in FIG. 3, the height of the top (h1) vs. bottom (h2) of the first stage (5) is 6.5 mm to 5.5 mm, and that of the second stage (6) is 7 mm to 5 mm. That of the third stage ridge (7) was 8.5 mm vs. 6.5 mm.

More specifically, it is an example of the dimensions of the first stage (5) to the third stage (7) of the ridges in the figure, but in the same figure, the shape of the wide abacus-shaped upper surface (14) is outward. In this projecting example, it has a bay shape (9) of 20 mmR, whereas the lower surface (15) has a straight shape (11) through a projecting arc shape (10) of 0.8 mmR. It is an important point.

Describing this configuration of the present embodiment together with its operation, the container body (1) in the state of FIG. 1 is roughly shown in FIG. 9, which includes a trunk (A) and a bottom (B) including a central portion and a lower portion. The upper shoulder part (C) is divided into three parts, and each part (A) (C) is stable because its diameter is composed of two diameters, a large diameter and a small diameter, in each comparison. Keeps vertical.

That is, the trunk portion (A) including the central portion and the lower portion is formed with a heel having the same inner and outer diameters, and the shoulder portion (C) is curved in a convex shape with a gentle inclination in the drinking portion (3) direction in appearance, In particular, the shoulder (C) gradually decreases the inner diameter of the valley (13) forming the ridge between the center portion and the drinking mouth portion (3) as shown in FIG. Since the difference is larger than (A), in the state where the central portion is extended, the inner diameter and the inclined surface of the mountain (12) and valley (13) forming the ridges are the strength and elastic force of the material. Even while you are drinking the contents, you can stop the drinking operation and compress the container body (1) in the vertical direction to crush the empty part so that the height can be kept reduced. is there.

This means that the shoulder (C) and the trunk (A) of the container body (1) are pressed by the restoring force, and the shoulder (C) is pressed, and the trough (13) The end face of the trough where the end face is located next to each other in the vertical relationship is compressed.

At this time, when viewed from the top of the mountain (12) of the reed, this corresponds to the fact that the valleys (13) on both sides are pushed toward the top of the mountain (12). At this time, the upper surface (14) of the reed is the lower surface. On the other hand, since the compression component force on the gentle slope side with respect to (15) is smaller than the compression component force on the steep slope side of the lower surface (15), the steep slope side valley (13) has a peak (12) portion. It has moved to the apex side.

At this time, it is considered that two large changes have occurred in the container body (1).
That is, the first is that the inner diameter of the crest (12) constituting the ridge increases with the expansion pressure, or the inner diameter of the valley (13) decreases with the compression pressure, and the second is the lower surface ( 15) the steeply inclined surface is bent.

Subsequently, the steeply inclined side passes directly below the mountain (12), and further sinks into the inside of the gently inclined side of the upper surface (14) as seen in the figure, until the height of the container body (1) is shortened. When moved, the force that restores the inner diameter of the peak (12) and the inner diameter of the valley (13) works, or the lower surface (15) is restored to the extended state when it is bent by the above operation, and is relieved. It becomes a state.
Therefore, even if the compression force is not always applied, this shortened state can be maintained.

The valley (13) having a small inner diameter is subjected to a compression pressure, the inner diameter is further reduced, and pressure stress is generated.
When the compression pressure is lost, the stress is released and the stretched state is restored.
Therefore, this container main body (1) maintains a shortened state at atmospheric pressure, and maintains a shortened state when compressive stress does not occur due to the difference in the inner diameter of the valley (13).

  As a result of repeated experiments, the container body (1) had a height (volume) of 1/4 to 1/10 or less, and even if it was abandoned in a trash can, the space could be remarkably reduced. It is.

  Next, an example of a mold suitable for mass production of the container body (1) of the present invention will be described.

  That is, in FIG. 5, (16) is a two-part mold body for producing the cylindrical container body (1) of FIG. 1, and the preform (17) can be inserted from the bottom surface thereof.

  Thus, the process of manufacturing the container body (1) using the mold body (16) in this embodiment will be described. First, the mold body (16) is in an opened state.

In this state, the preform (17) is automatically inserted into the mold body (16) from below. Then, after heating uniformly, about 40 kg of high-pressure air is fed into the preform (17), and the preform (17) is expanded to form the container body (1).
The container body (1) thus obtained is almost equal to the volume height when the container is filled with contents such as juice.

In FIG. 6, (18) is a mechanism for compression-molding the container body (1), and (19) is a horizontal base. Although not shown in detail in the central portion of the table (19), there is a chuck mechanism (20) having an appropriate configuration. The chuck mechanism (20) causes the mouth (3) of the container body (1) to be opened. The container body can be securely held in the reverse vertical state by being chucked.

(21) is a pair of pillars planted on both sides of the chuck mechanism (20), and the upper and lower support rods (22) and (23) are installed on the middle and upper ends of the pillars, respectively. There is. (24) is a cylinder fixed vertically in both the support rods (22) and (23), and its piston shaft (25) penetrates the lower support rod (23) and ends at the container body ( There is a pressing member (26) of the present invention that fits a little with the bottom (B) of 1) and presses the container body (1) in the direction of the mouth (3) from the bottom (B).

The fluid supplied to the cylinder (24) may be an appropriate one in addition to air pressure and hydraulic pressure. The supply means is also selected from those known to the public.
For example, in FIG. 8, (27) is a pressure source, and its output is supplied to the piston plate (31) in the cylinder (24) via the pipe (28), the three-story valve (29), and an appropriate shut-off valve (30). It is lined up and down.

Here, the container body (1) taken out from the mold body (16) is set in the chuck mechanism (20) of the compression molding mechanism (18).
Next, as a result of sending an appropriate fluid pressure from the pressure source (27) to the upper side of the piston disk (31) of the cylinder (24) through the pipe (28), the piston disk (31) and the piston shaft (25) are lowered. The pressing member (26) at the end comes into contact with the bottom (B) of the container body (1) and compresses the container body (1). The volume (low height) of the container body (1) obtained as described above is reduced in height from about 1/4 to about 1/10 of the original state.

That is, in this state, the body (A) including the upper part and the lower part of the container body (1) is compressed as the shoulder (C) and the body (A) are compressed as shown in FIGS. Specifically, the heel of the shoulder (4) is pressed from the state of the container body (1) in the state of being taken out from the mold body (16) shown in FIGS. The end face of 13) is compressed on the end face of the trough located adjacent to the top and bottom.

At this time, when viewed from the top of the mountain (12) of the reed, this corresponds to the fact that the valleys (13) on both sides are pushed toward the top of the mountain (12). At this time, the upper surface (14) of the reed is the lower surface. (15) Since the compressive force on the steep slope side is larger than the steep slope side valley (13), the steep slope side valley (13) has moved to the top side of the peak (12) portion. A split ball and bay shape (9) which forms an inclined portion above the heel of the shoulder portion (4) in the main body (1) and an inclined portion below the heel of the trunk portion (A) are so-called “balanced”. This is why the container body (1) can be kept in a crushed state without being covered with a cap.

FIG. 12 shows the distribution process from the production of the present invention plastic bottle to its disposal.
That is, as described above, the container body (1) of the present invention is formed by the mold body (16). In this case, the volume (height) is the same (L) as when the filler is filled. Next, the container body (1) moves to the compression molding mechanism (18) and is compressed in the vertical direction, so that the container (height) is greatly reduced, so that it is transported (32). Compared to the conventional method, the transport amount can be dramatically increased.

Next, the container body (1) is transported to the content filling plant and washed (33) or sterilized by air pressure (34) or, if these operations are not required, the content filling operation (35). Then, it will be inflated, wrapped with a cap or label, and lined up at the store (36).

Thus, if the tentative order is taken, it is possible to reduce the container (height) by pressing the empty part of the container body (1) while drinking the mineral water which is the content (37). As a result, the drinking container body (1) could be easily pushed into the handbag and carried.

After all the contents have been drunk, the empty container body (1) is crushed from above or below or from both the top and bottom, and the volume is reduced to about 1/4 to 1/10 (38) of the original volume. If it is thrown into a trash can etc., the amount of accommodation can be increased as much as possible, and the amount can be increased even in the collection operation.

The front view of the whole container main body of one Example. Front view when crushed Enlarged cross-sectional view of the container body bellows-shaped part Enlarged sectional view of the shoulder of the container body Cross-sectional explanatory drawing of the mold body The cross-sectional explanatory view of the compression molding mechanism shows a state before the container body is crushed. Cross-sectional explanatory drawing showing the state of the container body after being crushed Piping configuration diagram of compression molding mechanism Cross-sectional explanatory drawing of the state by which the container main body is crushed. Cross-sectional explanatory drawing of the container main body bellows-like part. Cross-sectional explanatory drawing of the bottom Explanatory drawing of distribution process from manufacture of container body to disposal

Explanation of symbols

(A) Height (A) 'Height (L)' Height (L) Height A Body B Bottom C Upper shoulder d1 Outer diameter d2 Outer diameter d3 Outer diameter h1 First stage collar (5) Upper h2 Lower 1 of the first stage bowl (5) Container body 2 Bellows 3 Mouth mouth 4 Back 5 First stage bellows 6 Second stage bellows 7 Third stage bellows 8 Four-stage bellows shape 9 Bay shape 10 Projection arc shape 11 Linear shape 12 Mountain 13 Valley 14 Upper surface 15 Lower surface 16 Mold body 17 Preform 18 Molding mechanism 19 Horizontal base 20 Chuck mechanism 21 Support column 22 Support rod 23 Support rod 24 Cylinder 25 Piston shaft 26 Press member 27 Pressure source 28 Piping 29 3 Sentence valve 30 Appropriate shut-off valve 31 Piston board 32 Transport 33 Washing 34 Sterilization work 35 Filling work 36 Shop front 37 Midway 38 1/4 to 1/10

Claims (13)

When the container body has a horizontal bellows part or all in the vertical direction, except for the vertical width of the mouth of the upper end, and the contents are filled in the manufacturing process When the container body is formed with a substantially smaller volume and a lower height than the volume and height of the container, and when the container body is blanked by operations such as drinking the contents, the contents are filled again. PET bottle that can extend and contract in the vertical direction, characterized by being able to be in a state of being substantially smaller and lower than the volume and height of Except for the vertical width of the mouth part at the upper end, the process of molding the container body, which is partly or entirely the horizontal bellows, and compressing the molded container body in the vertical direction A method for producing a plastic bottle capable of expanding and contracting in the longitudinal direction, characterized by comprising a step of performing a molding process for maintaining the compressed state at room temperature Except for the vertical width of the mouth of the upper end, a mold that molds the container body that is partly or entirely in the vertical direction has a bellows shape in the horizontal direction, and compresses the molded container body in the vertical direction Apparatus for producing a plastic bottle capable of expanding and contracting in the vertical direction, characterized by comprising a compression molding mechanism The bellows-like shape of the container main body shown in claim 1 is a plastic bottle capable of expanding and contracting in the vertical direction, wherein the upper side is an arc shape protruding upward and the lower side is a linear shape. In forming the bellows-like shape of the container body shown in claim 2, the bellows-like shape is an arc shape with the upper side protruding upward, and the lower side has a linear shape, Manufacturing method for plastic bottles In the mold for molding the container body shown in claim 3, the mold part for modeling the bellows shape is an arc shape with the upper side protruding upward, and the lower side has a linear shape. PET bottle manufacturing equipment that can expand and contract in the vertical direction In the process of molding the container body according to claim 2 or 5, the preform is automatically supplied into the mold and the bellows-like container body is molded with high-pressure air of about 40 kg. For producing PET bottles that can extend and contract in the longitudinal direction The compression molding mechanism according to claim 3 or 6 is provided with a mechanism for placing the accordion-shaped container body in the vertical direction and a mechanism for compressing the container body in the vertical direction. PET bottle manufacturing equipment that can expand and contract in the vertical direction The mechanism for placing the container main body in the vertical direction according to claim 3 or 6 and 8 is provided with a mechanism for chucking the drinking mouth portion in the apparatus main body so that the drinking mouth portion of the container main body is downward. PET bottle manufacturing equipment that can extend and contract in the vertical direction The mechanism for vertically compressing the container body in the container body compression molding mechanism described in claim 3 or 6, 8 is operated from the bottom of the container body by a piston and cylinder mechanism which is operated by fluid pressure and is provided in the apparatus body. An apparatus for manufacturing a plastic bottle capable of expanding and contracting in the vertical direction, which is formed by pressing the container body in the direction of the mouthpiece In the process of molding the container body according to claim 2 or 5, 7, the molded container body is compressed in the vertical direction, and the bellows-like portion of the container body is one or both of the longitudinal directions. A method for producing a plastic bottle capable of expanding and contracting in the vertical direction, characterized in that the bellows-like portion can be kept in a state of being overlapped and crushed when being pressed in the center direction of the container body from The container body in the collapsed state in which the bellows-like portions overlap each other obtained according to claim 2 or 5, 7, 11 is a filling plant for the contents filled in the container body in the state of its ridges. Before being filled with the above-mentioned contents, and having the process of returning the container body to the original state before being crushed with the pressure to fill the contents or filling the contents. A method for producing a plastic bottle that can stretch and contract in the longitudinal direction The process for compressing the container main body according to claim 2 or 5, 7, 10 is performed while sucking air in the container main body, and a method for producing a plastic bottle capable of expanding and contracting in the vertical direction

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