JPH066214U - Crushable blow-molded bottle and its mold - Google Patents

Abstract

(57) [Summary] [Structure] 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 is formed at approximately the center of each side surface, and two outward folding folds are provided from the shoulder line to the leg portion at positions separated from the fold line in the front and back directions of the body. A tatami line is formed, and the bottom portion is formed to be a raised bottom from the leg portion, and diagonally connected from the end portion of one leg portion to the opposite end portion of the other leg portion, Formed as a bridging part including a parting line at the time of bottle molding, and the inward folding lines formed on both side surfaces of the body part have a substantially triangular shape sandwiched between the leg part and the bridging part. Crushable blow molded bottles, characterized by being extended to the top of To, moldable to the molding die without having to forcibly disconnect the bottle. [Effect] The crushed shape after discharging the contents is stably and continuously retained.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a crushable blow-molded bottle and a mold for molding the crushable blow-molded bottle. More specifically, the present invention relates to a crushable blow-molded bottle for reducing the volume of a container after the contents are discharged. Also, the present invention relates to a molding die that enables molding without forcing.

[0002]

[Prior art]

 Blow-molded plastic bottles have been widely used as containers for liquid detergents and various beverages. This type of plastic bottle is discarded after the contents have been discharged, but the size of the plastic bottle is large and the waste collection is difficult to perform efficiently. The challenge is to reduce the volume. The invention described in Japanese Patent Application Laid-Open No. 3-148451 is proposed in order to solve the above-mentioned problems, and the configuration is such that the crush lines are located on the same plane on both sides and the bottom of the body. Disclosed is a blow bottle formed to 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.

Further, in French Patent No. 1,385,639, French Patent No. 2,288,445, and US Pat. No. 3,395,836, a vertical wall is formed on the wall of the container. There is disclosed a structure of a bottle which is capable of reducing the inner volume of the container by providing a fold in the direction.

[0004]

[Problems to be solved by the device]

 However, since the crushable plastic bottle disclosed in the above-mentioned Japanese Patent Laid-Open No. 3-148451 has a flat crushed shape, the elastic restoring force of the bottle and the structure that air easily enters inside. However, there is a problem that it is difficult to hold the completely crushed shape stably and continuously. Further, 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, and in such a bottle, after the label is incorporated into the mold, it is blown. In addition to the drawback that in-mold molding cannot be applied, the biting part formed by the parting line in the center of the front and back central areas that have the largest label area becomes weaker, and Since the parting line extends to the ground contact part, it has a problem that the shock resistance when dropped and the like is significantly reduced and the independence is deteriorated, and the amount and type of contents to be stored are limited.

In addition, the foldable containers disclosed in the above-mentioned French patent and US patent also function to facilitate the discharge of the contents, and after the contents are discharged, the folds are the original ones. Since it is restored to its shape, this container is not intended to reduce the volume of the container after discharging the contents.

[0006]

[The purpose of the device]

 Therefore, an object of the present invention is to provide a crushable blow-molded bottle that maintains a completely crushed shape in a stable and continuous manner and has excellent strength when storing contents. Another object of the present invention is 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 provide.

[0007]

[Means for Solving the Problems]

 The present invention has been proposed in order to achieve the above-mentioned object, and the most technical feature thereof is that the shape of the bottle after discharging the contents is a Z shape or an inverted Z shape as a whole. It is an object of the present invention to provide a bottle that can be crushed and can 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. Around the center of both sides of the trunk, there are two folding lines that extend inward from the shoulders to the bottom, and two from the shoulders to the legs at positions distant from the folding lines in the front and back directions of the trunk. An outward folding line is formed, and the bottom part is formed to be a raised bottom from the leg part and diagonally extends from the end part of one leg part to the opposite end part of the other leg part. The inward fold lines that are connected and formed as a bridging part that includes the parting line at the time of bottle molding and that are formed on both sides of the body part are sandwiched between the leg part and the bridging part. Crushable, characterized by being extended to the apex of a substantially triangular shape Blow molded bottles are provided.

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

Furthermore, 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 a bottom shape, and a tapered portion of the body is inclined. A blow mold with a maximum right angle to the parting line is provided.

[0012]

[Specific explanation of the device]

 The present invention will be described below based on specific examples shown in the accompanying drawings. A preferred example of the blow molding bottle of the present invention is shown in FIG. 1 to FIG. 9, a sectional view of the molding die thereof is shown in FIG. 10, and a conventional crushable container and a sectional view of the molding die thereof are shown in FIG. 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. 5 is a sectional side view of FIG. 5, FIG. 7 is a partial sectional view of each section of the bottle in a crushed state, FIG. 8 is a sectional view taken along the line AA of the bottle shown in FIG. 1, and FIG. FIG. 10 shows a mold having a B-B cross section for molding the bottle of the present invention, FIG. 11 shows a bottom view of a conventional crushed bottle, and FIGS. 12 and 13 show an example of a mold for molding the bottle. FIG.

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, a body portion (1b, 1c), a bottom portion (5), and a bottom portion. It consists of legs (1d, 1e) that have a ground plane below both ends of the trunk, and a fold line (2a) inwardly extending from the shoulder to the bottom is formed at approximately the center of both sides of the trunk. Two outward folding lines (2b) are formed from the shoulders to the legs at positions separated from the folding line in the front and back directions of the body. The bottom part (5) of the blow-molded bottle is formed as a bridge part of the raised bottom that is diagonally connected from the end part of one leg part to the opposite end part of the other leg part. Inside, there is a parting line for molding bottles. Inward fold lines (2a) formed on both sides of the body are connected to the bottom fold line (4a) and extend to the apex of a substantially triangular shape sandwiched by the legs and bridges. It is installed (see Figure 3).

FIG. 4 shows a sectional view taken along the line CC of FIG. 3, in which the bottom portion (5) located in the middle of the leg portions (1d, 1e) is formed as a slightly raised bottom than the bottom surface of the leg portions, In the middle between the leg and the bottom, a fold line (4a) is provided at the apex, and a raised bottom formed by the fold lines (4b, 4c) is provided. 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, two triangular surfaces (7, 8) formed in a portion sandwiched between the leg portion and the bridging portion are formed inside the fold line (4a) when the bottle is crushed. Is folded in one direction. When the bottle is crushed, the bottom that is folded from the fold line (4b) that forms both end faces of the bottom is included in the space that is folded from the fold line (4c) that forms the inner end face of the leg. The crushing is completed when the bending lines (4c) of the legs (1d, 1c) are in contact with each other (see FIGS. 5 and 6).

FIG. 7 shows a partial cross-sectional view of the body part where the bottle is crushed. As you can see 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 near the shoulder. It is folded while being pushed into the inner surface of one of the body parts, and this shape, together with the folded shape of the bottom part, makes it possible to stably and continuously maintain the completely crushed shape.

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. 8 and 9 are cross-sectional views taken along the lines AA and BB of the bottle shown in FIG. 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 cylindrical body. From the fold line (2a, 2b) formed between the torso and the substantially diagonal corner of the body, the taper of the folding surface (12) is maximum at a right angle to the parting line. Since it is formed in a slanted shape, it becomes a taper for the mold to come off, and the mold can be opened without forcibly removing the bent concave part on the side where the entire bottle is long. It has the characteristic that the bottle can be molded only by forcibly removing the bottom part, 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 a molding technique, a bottle having such a shape is shown in FIG. 12 or FIG. It is molded by a mold having a different 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 that the production efficiency is significantly reduced because the flexible cutting is performed.

Further, in order to avoid forcible removal at the time of molding, when the parting line is formed as a line connecting the front surface and the rear surface of the bottle body, a mold as shown in FIG. 13 should be used. In this case, parting lines are formed on the front surface and the rear surface of the bottle, although it is not necessary to force removal during molding, so labeling such a bottle is suitable. Not only can it not be achieved, but the problem arises that the bottle molding method using the in-mold label method cannot be adopted.

[0020]

[Effect of device]

 The crushable blow-molded bottle of the present invention has a parting line formed by bridging the legs with diagonal lines, so that the molded product does not have to be forcibly removed from the mold and is produced. In addition to being able to improve efficiency, the center part of the body part is wrapped inwardly of the wall surface in a stable shape when crushed, so there is great resistance to elastic return force. The crushed shape is stably and continuously retained, so that the volume of the bottle can be significantly reduced at the time of disposal after discharging the contents. Further, in the mold for blow molding bottle provided by the present invention, since the parting line is formed diagonally from the end of one leg to the opposite end of the other leg, When taking out a molded product from the mold, the taper of the fold line formed in the vertical direction of the bottle becomes a falling taper, and the molded product is taken out without forcibly removing the fold line, which is the most important structure of the bottle. Therefore, the production efficiency will be remarkably 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 Bottle body 1a Bottle shoulder 1b Bottle body (front) 1c Bottle body (rear) 1d Bottle leg 1e Bottle leg 2a Inward fold line 2b Outward fold line 4a Bottom fold line 4b Bottom fold line 4c Bottom fold line Line 5 Convex part (parting line) 5a Rib 7 Bending surface 8 Bending surface

Claims (4)

[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. 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 up to a substantially triangular apex part sandwiched between the leg part and the bridging part. A crushable blow molded bottle characterized by being extended. 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 split mold for blow molding which is divided into two in the vertical direction for molding the crushable blow bottle according to claim 1, wherein a parting line formed by the split mold is The fold surface taper formed between the first corner of the rectangular tubular body and the substantially diagonal corner of the quadrangular body has an inclined shape with a maximum right angle to the parting line. A mold for blow bottle molding, which is characterized in that