JPH0720011Y2 - Crushable blow molding bottle and its molding die - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a crushable blow molding bottle and a mold for molding the blow molding bottle,
More specifically, the present invention relates to a blow-molded bottle that can be crushed in order to reduce the volume of a container after the contents have been discharged, and a molding die that can mold the container without forcing it.

[0002]

Blow-molded plastic bottles have been widely used as containers for liquid detergents and various beverages.
Although this type of plastic bottle is discarded after the contents are discharged, it has the problem that the volume is large with the shape as it is and it is difficult to collect waste efficiently. Downsizing is an issue. The invention described in JP-A-3-148451 is proposed to solve the above-mentioned problems,
The configuration discloses a blow bottle in which crush lines are formed on the same plane on both sides and the bottom of the body. It is recognized that the plastic bottle of this prior invention can be folded into a flat state, and is convenient for storing the bottle before filling the contents and discarding the bottle after use.

French patent 1,385,639
No. 2,288,445 and US Pat. No. 3,395,836 also have longitudinal folds on the wall of the container to reduce the internal volume of the container. The configuration of the bottle that enables the above is disclosed.

[0004]

However, since the crushable plastic bottle disclosed in Japanese Patent Laid-Open No. 3-148451 has a flat crushed shape, the elastic restoring force of the bottle is sufficient. However, there is a structural limitation that air can easily enter the inside, and there is a problem that it is difficult to stably and continuously maintain a completely crushed shape. Furthermore, the above-mentioned prior invention can only take a molding method in which the parting line is formed in the front direction of the bottle depending on the shape of the bottle.In such a bottle, blow molding is performed after the label is incorporated in the mold. In addition to the disadvantage that in-mold molding cannot be applied, the part that is engraved by the parting line in the center of the front and back center part that has the maximum label area, the biting part is weak in strength, and this parting Since the line extends to the grounded portion, there is a problem that impact resistance when dropped and the like is significantly lowered and self-sustainability is deteriorated, and the amount and type of contents to be stored are limited.

Further, in the pleated container disclosed in the above-mentioned French and US patents, the folds function to facilitate the discharge of the contents, and after the contents are discharged, the folds are the original. This container is not intended to reduce the volume of the container after the contents are discharged.

[0006]

OBJECT OF THE INVENTION Therefore, an object of the present invention is to provide a crushable blow-molded bottle which maintains a perfect crushed shape stably and continuously and has an excellent strength when storing contents. To do. Another object of the present invention is to provide a blow molding bottle molding die capable of efficiently molding a blow molding bottle having the above-mentioned specific structure without forcibly removing it in a molding operation. To do.

[0007]

The present invention has been proposed in order to achieve the above-mentioned object, and its most technical feature is that the shape of the bottle after discharging the contents is Z-shaped as a whole. It is an object to provide a bottle that can be crushed into a letter shape or an inverted Z shape and stably and continuously maintain this state, and a mold that can efficiently mold the blow-molded bottle.

That is, according to the present invention, there is provided a blow molded bottle comprising a shoulder portion having a mouth portion, a body portion, a bottom portion, and a leg portion having a grounding surface below both ends of the body portion from the bottom portion.
A folding line inwardly extending from the shoulder portion to the bottom portion, and two fold lines extending from the folding line to the front and back directions of the body portion from the shoulder portion to the leg portion, at approximately the center of both side surfaces of the body portion. And the outward folding line of the
It is formed on the raised bottom from the legs, and diagonally connects from the end of one leg to the opposite end of the other leg as a bridging part including the parting line at the time of bottle molding. The inward folding lines formed and formed on both side surfaces of the body portion are extended to the apex of a substantially triangular surface sandwiched between the leg portion and the bridging portion. A crushable blow-molded bottle is provided.

Further, according to the present invention, in the bottle, an inward folding line formed on the bottom surface of the bottle is located between the leg portion and the bridge portion and inwardly upward from the bottom surface of the bridge portion. A crushable blow molded bottle is provided.

Further, according to the present invention, there is provided a crushable blow-molded bottle in which the outward folding line is formed as the inner end surface of the leg portion.

According to the present invention, there is also provided a blow-molded bottle comprising a shoulder portion having a mouth portion, a body portion, a bottom portion, and a leg portion having a grounding surface below both ends of the body portion from the bottom portion. A fold line inwardly extending from the shoulder portion to the bottom portion, and two outward facing lines extending from the shoulder line to the front portion and the back direction of the body portion from the shoulder portion to the leg portion in approximately the center of both side surfaces of the portion. And the bottom part is formed to be a raised bottom from the leg part, and the one side part side end of the body part of one leg part to the other leg part Is formed as a bridging portion diagonally connected to the end portion on the other side surface side, and the parting line at the time of bottle molding is at the bottom portion, one side surface side of the body portion at one leg portion From the end of the other side of the body of the other leg The inward folding lines formed on both side surfaces of the body portion are extended to the apex of a substantially triangular surface sandwiched between the leg portion and the bridging portion. A crushable blow molded bottle is provided.

According to the present invention, there is also provided a blow-molded bottle comprising a shoulder portion having a mouth portion, a body portion, a bottom portion, and a leg portion having a grounding surface below both ends of the body portion from the bottom portion. A fold line inwardly extending from the shoulder portion to the bottom portion, and two outward facing lines extending from the shoulder line to the front portion and the back direction of the body portion from the shoulder portion to the leg portion in approximately the center of both side surfaces of the portion. And the bottom part is formed to be a raised bottom from the leg part, and the one side part side end of the body part of one leg part to the other leg part Is formed as a bridging portion diagonally connected to the other side surface end portion, and the parting line at the time of bottle molding is from the other side surface side end portion of the one body portion of the body portion. Across the bottom of one side of the body in the other leg Is formed extending out state until parts, inward to Oritatamisen formed on both sides of the barrel,
There is provided a crushable blow-molded bottle characterized in that the blow-molded bottle is extended to the apex of a substantially triangular surface sandwiched between the leg portion and the bridge portion.

Further, according to the present invention, in order to form a crushable blow-molded bottle having the above-mentioned specific shape, a parting line is formed on a diagonal line of the bottom shape, and the inclination of the tapered portion of the body is adjusted. A blow mold with a maximum right angle to the parting line is provided.

[0014]

DETAILED DESCRIPTION OF THE INVENTION The present invention will be described below with reference to specific examples shown in the accompanying drawings. 1 to 9 show a preferred example of the blow-molded bottle of the present invention, FIG. 10 shows a sectional view of the molding die thereof, and further a sectional view of a conventional crushable container and the molding die thereof. 11 to FIG. 13.
1 is a front view of the bottle, FIG. 2 is a side view thereof, FIG. 3 is a bottom view, FIG. 4 is a sectional view taken along line CC of FIG. 3, FIG. 5 is a bottom view of the bottle in a crushed state, and FIG. FIG. 5 is a side sectional view, FIG. 7 is a partial sectional view in each section in a state where the bottle is crushed,
8 is a sectional view taken along the line AA of the bottle shown in FIG. 1, FIG. 9 is a sectional view taken along the line BB, FIG. 10 is a mold having a sectional view taken along the line BB for molding the bottle of the present invention, and FIG. The bottom view of the crushed bottle and FIGS. 12 and 13 are cross-sectional views showing an example of a mold for molding the crushed bottle.

As shown in FIGS. 1 and 2, the blow-molded bottle (1) of the present invention comprises a shoulder portion (1a) having a mouth portion and a body portion (1).
b, 1c), the bottom (5), and the legs (1d, 1e) having a grounding surface below both ends of the torso from the bottom. Folding line facing inward
(2a) and two outward-facing fold lines (2 from the shoulders to the legs) at positions distant from the fold line in the front and back directions of the body.
b) and are formed. Blow Molded Bottle Bottom (5)
As shown in FIG. 3, the leg portion (1d) (one leg portion) from the left end portion (one side surface end portion of the trunk portion) of FIG. 3 to the leg portion (1e) (
The other leg portion) is formed as a raised bottom bridging portion diagonally connected to the end portion on the right side in FIG. 3 (the end portion on the other side surface side of the body portion). The bottom part (5) has a parting line at the time of molding the bottle along the diagonal line, that is, from the left end of the leg (1d) in FIG. 3 to the right side of the leg (1e) in FIG. It is provided to the end on the side. The inward folding lines (2a) formed on both sides of the body are the bottom folding lines (4a).
It is connected to a) and extends to each vertex (7a, 8b) of each substantially triangular surface (7, 8) sandwiched between the leg and the bridge (see Fig. 3). .

FIG. 4 shows a sectional view taken along the line CC of FIG. 3, in which the bottom part (5) located in the middle of the leg parts (1d, 1e) is formed as a slightly raised bottom than the bottom face of the leg part, Bend line (4b, 4c) with fold line (4a) as the apex in the middle of leg and bottom
Is provided with a raised bottom. On the parting line on the lower surface of the bottom part (5), the part where the resin is cut during the molding of the bottle remains as the convex part (5a).

In FIG. 3, the two triangular surfaces (7, 8) formed in the portion sandwiched between the leg portion and the bridging portion are fold lines (4a) when the bottle is crushed. It is folded inward. When the bottle is crushed, the bottom part folded from the fold line (4b) forming the both end faces of the bottom part is included in the space folded from the fold line (4c) forming the inner end face of the leg part, and the leg is included. Each bending line (4c) of part (1d, 1c)
The crushing is completed in the state where they are in contact with each other (Figs. 5 and 6).
reference).

FIG. 7 shows a partial cross-sectional view of the body portion obtained by crushing the bottle. As can be seen from this cross-sectional view, the bottle body crushed by the fold lines (2a, 2b) on the side of the bottle has a fold surface with the inward fold line (2a) as the apex except for the vicinity of the shoulder. It is folded while being pushed into the inner surface of the body, and this shape, in combination with the folded shape of the bottom, makes it possible to stably and continuously maintain the completely crushed shape.

In the above, the parting line is at the bottom (5).
In the above description, the case is described in which it is formed along the longitudinal direction, but the present invention is not limited to this.
That is, the leg portion (1d) (one leg portion) crosses the bottom portion (5) from the right end portion (the other side surface end portion of the body portion) of FIG. The other leg portion) may be formed so as to extend to the end portion on the left side in FIG. 3 (the end portion on the one side surface side of the body portion).

Next, it will be explained that the shape of the blow-molded bottle of the present invention is advantageous from the viewpoint of molding technology. FIG. 8 and FIG. 9 show AA of the bottle shown in FIG.
FIG. 4 is a sectional view taken along the line B-B and the line B-B. In the blow-molded bottle of the present invention having such a cross-sectional shape, as shown in FIG. 10, the parting line (5) formed by each split mold has the first corner of the rectangular tubular body. To the corners on a substantially diagonal line thereof, as shown in FIG. 9, the taper of the folding surface (12) defined by the folding lines (2a, 2b) formed between the body parts is the parting line. Since it is formed in an inclined shape that maximizes the right angle with respect to the mold, it becomes a taper of the mold, and the mold can be opened without forcibly removing the bent concave part on the side surface that has the length of the entire bottle, It is characterized in that the bottle can be molded only by forcibly removing the short raised bottom portion formed on the bottom portion, resulting in extremely excellent production efficiency.

On the other hand, when the shape of the conventional crushable bottle shown in FIG. 11 is viewed from the viewpoint of molding technology, the bottle having such a shape is shown in FIG. 12 or 13. It is molded by a mold having a structure. However, in the case of the mold shown in FIG. 12, the folding line (2b) is inserted into both inner surfaces of the split mold in an expanded state, and when removing the molded bottle from the mold,
There is a problem in that production efficiency is significantly reduced because the bottle is forced to be removed one by one using its flexibility.

Further, in order to avoid excessive pulling at the time of molding,
When the parting line is formed as a line that connects the front surface and the rear surface of the body of the bottle, a mold as shown in FIG. 13 is used, and in this case, it is not forcedly removed during molding. However, since parting lines are formed on the front surface and the rear surface of the bottle, not only labeling cannot be achieved on such a bottle, but also the bottle molding method using the in-mold label method is not possible. The problem arises of not being able to hire.

[0023]

[Effect of the Invention] In the crushable blow-molded bottle of the present invention, since the parting line is formed so as to bridge the legs with a diagonal line, the molded product does not have to be forcibly removed from the mold. Finished, it is possible to increase production efficiency,
When crushed, the center part of the body is wrapped inside the wall surface in a stable shape, so there is great resistance to elastic return force, and the crushed shape remains stable and continuous. Therefore, the volume of the bottle can be significantly reduced at the time of disposal after discharging the contents. Further, in the blow molding bottle molding die provided by the present invention, since the parting line is formed diagonally from one leg end to the opposite end of the other leg, When taking out the molded product from the mold, the taper of the fold line formed in the vertical direction of the bottle becomes a falling taper,
Since the molded product can be taken out without forcibly removing the folding line which is the most important structure of the bottle, the production efficiency becomes extremely high.

[Brief description of drawings]

FIG. 1 is a front view showing an example of a bottle of the present invention,

FIG. 2 is a side view showing an example of the bottle of the present invention.

FIG. 3 is a bottom view showing an example of the bottle of the present invention.

FIG. 4 is a cross-sectional view taken along the line CC of the bottom surface of the bottle in FIG.

FIG. 5 is a bottom view showing an example of a state in which the bottle of the present invention is crushed.

FIG. 6 is a side sectional view of FIG.

FIG. 7 is a partial cross-sectional view in each cross section of the bottle of the present invention in a crushed state.

8 is a cross-sectional view taken along the line AA of the bottle shown in FIG.

9 is a cross-sectional view taken along the line BB of the bottle shown in FIG.

FIG. 10 is a cutaway sectional view showing a mold structure of BB section for molding the bottle of the present invention.

FIG. 11 is a side view of a conventional crushed bottle.

FIG. 12 is a cross-sectional view showing an example of a mold for molding the bottle of FIG.

FIG. 13 is a cross-sectional view showing another example of the mold for molding the bottle of FIG.

[Explanation of symbols]

 1 Blow molded bottle 1a Bottle shoulder 1b Bottle body (front) 1c Bottle body (rear) 1d Bottle leg (one leg) 1e Bottle leg (other leg) 2a Inward folding line 2b Outward folding Tatami line 4a Bottom fold line 4b Bottom fold line 4c Bottom fold line 5 Bottom 5a Convex part 7 Triangular surface 7a Apex part 8 Triangular surface 8a Apex part

Claims (6)

[Scope of utility model registration request] 1. A blow-molded bottle comprising a shoulder portion having a mouth portion, a body portion, a bottom portion, and a leg portion having a grounding surface below both ends of the body portion from the bottom portion, wherein both side surfaces of the body portion are substantially formed. In the central part, there are a folding line inwardly extending from the shoulder to the bottom, and two outward folding lines extending from the shoulder to the legs at positions apart from the folding line in the front and back directions of the body. While being formed, the bottom portion is formed to be a raised bottom from the leg portion, and is diagonally connected from the end portion of one leg portion to the end portion on the opposite side of the other leg portion during bottle molding. Formed as a bridging part including a parting line, and the inward folding lines formed on both side surfaces of the body part are apexes of a substantially triangular surface sandwiched by the leg part and the bridging part. A crushable blow-molded bottle characterized by being extended to the part. 2. The inward-folding fold line formed on the bottom surface of the bottle is located between the leg portion and the bridge portion and is formed inwardly upward from the bottom surface of the bridge portion. Blow molded bottle that can be crushed. 3. The crushable blow-molded bottle according to claim 1, wherein the outward folding line is configured as an inner end surface of the leg portion. 4. A blow-molded bottle comprising a shoulder portion having a mouth portion, a body portion, a bottom portion, and a leg portion having a grounding surface below both ends of the body portion from the bottom portion, wherein both side surfaces of the body portion are substantially formed. In the central part, there are a folding line inwardly extending from the shoulder to the bottom, and two outward folding lines extending from the shoulder to the legs at positions apart from the folding line in the front and back directions of the body. While being formed, the bottom part is formed to be a raised bottom from the leg part, and from one end side end of the body part on one leg part to the other side face side of the body part on the other leg part. It is formed as a bridging portion diagonally connected to the end portion, and the parting line at the time of bottle molding is the bottom portion, from the end portion on the one side surface side of the body portion of one leg portion to the other It is formed over the other side end of the body of the leg, Inward fold lines formed on both sides of the body are crushable, characterized in that they extend to the apex of a substantially triangular surface sandwiched by the legs and bridges. Blow molded bottle. 5. A blow-molded bottle comprising a shoulder portion having a mouth portion, a body portion, a bottom portion, and a leg portion having a grounding surface below both ends of the body portion from the bottom portion, wherein both side surfaces of the body portion are substantially formed. In the central part, there are a folding line inwardly extending from the shoulder to the bottom, and two outward folding lines extending from the shoulder to the legs at positions apart from the folding line in the front and back directions of the body. While being formed, the bottom part is formed to be a raised bottom from the leg part, and from one end side end of the body part on one leg part to the other side face side of the body part on the other leg part. It is formed as a bridging portion diagonally connected to the end portion, and the parting line at the time of bottle molding crosses the bottom portion from the end portion on the other side surface side of the body portion in one leg portion. A state in which the other leg extends to the end on one side of the body The inward folding lines formed on both side surfaces of the body portion are formed to extend to the apex of a substantially triangular surface sandwiched between the leg portion and the bridging portion. A blow molded bottle that can be crushed. 6. A two-piece split mold for blow molding to be longitudinally for forming a collapsible blow bottle according to claim 1, party formed me by the split mold The tangling line is formed from the first corner of the quadrangular cylindrical body portion to a corner on a substantially diagonal line thereof, and the taper of the bending surface formed between the body portions has a maximum right angle to the parting line. A blow bottle molding die, which is formed in an inclined shape.