JPH07276478A - Biaxially stretched blow molded handled bottle - Google Patents

Abstract

PURPOSE:To eliminate the apprehensions of the leakage of content, the shaking of a handle and the separation thereof at the time of pouring or at the time of the handling due to the handle in a biaxially stretched blow molded handled bottle adapted to liquid content such as a fruit drink, oolong tea, a body shampoo or a softening finish agent. CONSTITUTION:In a biaxially stretched blow molded handled bottle 100 obtained by providing a separate handle 200 to the handle attaching recessed part 110 provided to the rear wall of a bottle main body by insert molding, a fitting part fitted to a bottle peripheral wall 120 is formed to the attaching part 210 of the handle 200 and vertical communication grooves 130 are formed to the interior of the bottle main body 100 on both left and right sides of the handle 200 attached to the bottle main body 100. Vertical parting lines 140 are formed to the left and right side walls of the bottle main body 100 and the peripheral wall 120 of the handle attaching recessed part 110 of the bottle main body 100 is formed into an almost spherical or oval surface shape.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a biaxially stretched blow-molded bottle with a handle for use in beverages such as fruit juice beverages, mirin and oolong tea, and liquid contents such as body shampoos and softening agents.

[0002]

2. Description of the Related Art Recently, as the scope of application of plastic bottles has expanded as a container for liquid contents, the internal volume has increased, and the demand for bottles with a handle of 1 liter or more has increased. Conventionally, as a method of attaching a handle to a plastic bottle, a part of the body of the bottle is formed into a recess to form a handle when molding the bottle, and a parison (a molten tubular molding material) inside the handle is crushed and molded. Then, the inside of this crushed handle is cut out to form a handle, a fitting part is formed on the body of the bottle body, and a separate handle is fitted and locked to this fitting part. There has been a method in which a separate handle is mounted in advance in the molding die of the main body, and the separate handle is insert-molded in the handle mounting recess provided on the rear wall of the bottle body.

[0003]

However, a bottle in which a part of the bottle body is formed as a concave portion and has a handle shape has a problem that it is difficult to hold during use and the surface is slippery. A bottle with a handle that is formed by crushing the inside of the handle and cutting it to form a handle is a bottle that is stretch blow molded using a material such as polyethylene terephthalate.There are restrictions on the shape of the molding method and pinch-off (melted parison inside the handle). It was not possible to apply it because the fusion of the outer edge of the cut-out portion) was insufficient. Further, in the case where a fitting portion is formed on the body of the bottle body and a separate handle is fitted and locked to this fitting portion, it is difficult to firmly form the fitting portion on the body by the blow molding method, There was a danger that the handle would come off during use. Further, in the case where a separate handle is insert-molded into the handle mounting recess of the bottle body according to the present invention, when the contents are poured out, the handle mounting recess protruding inside the bottle is the outside air. To prevent the replacement of the contents with
There was a problem that the contents sometimes protruded. Further, if the handle mounting recessed portion of the bottle body has an uneven thickness, the peripheral wall to which the handle is mounted is partially reduced in strength and easily deformed,
When pouring out the contents or when handling with the handle, there was a fear that the handle would shake and it would be difficult to use, or the handle might come off.

The present invention solves the above-mentioned conventional problems of a biaxially stretch blow-molded bottle with a handle in which a separate handle is insert-molded in the bottle body, and the contents of the bottle can be handled when pouring or handling by the handle. The present invention provides a biaxially stretch blow-molded bottle with a handle, which eliminates the protrusion of the handle, the wobbling of the handle, and the danger of the handle coming off.

[0005]

The first aspect of the present invention is shown in FIG.
As shown in (a), (b), (c) and (d), a separate handle (200) is placed in the handle mounting recess (110) provided on the rear wall of the bottle body (100). An insert-molded biaxially stretch blow-molded bottle (10) with a handle, wherein a mounting portion (210) of the handle (200) has a fitting portion that fits with a bottle peripheral wall (120).
00) has vertical communication grooves (130) inside the bottle body (100) on both the left and right sides of the handle (200), and the vertical parting line (140) is provided on the left and right sides of the bottle body (100). The peripheral wall (1) of the recessed portion (110) for attaching the handle of the bottle body (100), which is provided on the side wall.
20) A biaxially stretched blow-molded bottle (10) with a handle, characterized in that the shape is substantially spherical or elliptical.

The second aspect of the present invention is shown in FIGS.
As shown in (c) and (d), the bottle body (100)
To the handle mounting recess (110) provided on the rear wall of the
A biaxially stretched blow-molded bottle (10) with a handle, in which a separate handle (200) is insert-molded.
00) has a fitting element (230) having fitting portions in four directions for fitting with the bottle peripheral wall (120) on a mounting portion (210) of the bottle (00) and is attached to the bottle body (100) (20).
0) has vertical communication grooves (130) inside the bottle body (100) on both left and right sides, and has vertical parting lines (140) on the left and right side walls of the bottle body (100),
In addition, the peripheral wall (120) of the handle mounting recess (110) of the bottle body (100) is substantially spherical or elliptical, and the biaxially stretched blow molded bottle with handle (10). ).

In the insert molding in which the separate handle is joined at the same time as the biaxially stretch blow molding of the bottle main body, as shown in FIG. 4, for example, as shown in FIG. 320), a body rear side mold (310) forming the rear side of the bottle body, and a neck mold (33
0) and a bottom die (340), and a biaxially stretched blow molding die (300) is used, and a body rear side die (310) is used.
A separate handle (200) is attached to the center of the preform (40) and the neck mold (330) is preheated (40).
0) is suspended and clamped, and then the preform (400) is placed in the clamped biaxial stretch blow molding die (300).
Is stretched in a longitudinal direction in a stretching lot (not shown), air is blown into the preform to mold the bottle body, and at the same time, a separate handle (200) is joined to the bottle body. The molding material used for the biaxial stretch blow molding is polyethylene terephthalate, acrylonitrile resin, polypropylene, polyvinyl chloride, etc., and the separate handle is a molding material such as polyethylene, polypropylene, ABS resin, polyethylene terephthalate. The material is molded by an injection molding method.

Further, a separate handle is provided on the rear mold of the body (31
0) is installed in the central part of 0) in advance as shown in FIG.
As shown in (a) and (b), the body rear mold (31
0) in the handle mounting recess (312), the positioning pin (31
3) It is fitted by using a misalignment preventing recess or the like. Depending on the shape of the handle, a vaccum hole may be provided at an appropriate position of the handle mounting recess (312) to suck a separate handle to prevent the handle from being attached or displaced during molding.

[0009]

In the conventional biaxially stretch blow-molded bottle with a handle, the peripheral wall of the handle mounting concave portion of the bottle body is substantially cubic or prismatic. Therefore, the shape of the cavity and the grip of the mold forming this portion is also cubic or prismatic. Therefore, when molding the bottle body, the preform in the heated state that expands in the mold does not easily slip where it comes into contact with the mold cavity and the handle, and it tends to be cooled and thick, and at that time it is still in contact. On the contrary, in places where there is no wall, the wall tends to be thin. As a result, uneven thickness is created in the handle mounting recess of the bottle body, and the strength of the peripheral wall on which the handle is attached is partially reduced, causing the handle to wobble and difficult to use when pouring out or carrying the contents. However, there is a fear that it may come off. On the other hand, FIG.
As shown in (a), (b), (c) and (d), the biaxially stretch blow-molded bottle (10) with a handle of the present invention is provided with a handle mounting recess (110) of the bottle body (100). The peripheral wall (120) is substantially spherical or elliptical.
Therefore, when the bottle main body (100) is molded, the heated preform that expands in the mold is easy to slip even if it comes into contact with the mold cavity and the separate handle, and is not relatively cooled, so that the meat It is difficult for the bottle body to become thick, and the wall thickness of the handle mounting concave portion of the bottle body becomes uniform as a whole, and the strength of the peripheral wall to which the handle is mounted becomes uniform. As a result, when the contents of the bottle are poured out or carried, there is no fear that the handle will be wobbled and will be difficult to use, or that it will come off.

As shown in FIGS. 3A and 3B, the biaxially stretch blow-molded bottle with a handle according to the present invention has a handle insertion recess (312) substantially at the center of the body rear mold (310). ) Is attached with a separate handle (200) in advance, and as shown in FIG.
As shown in (b), (c) and (d), this separate handle (200) is attached to the peripheral wall (12) of the bottle body (100).
0) The bottle body (100) is manufactured by insert molding in which the bottle body (100) is joined at the same time as the biaxially stretch blow molding of the bottle body (100) to the handle mounting concave portion (110) having a substantially spherical shape or a substantially elliptical shape. Handle attached to (20
Vertical communication grooves (130) are naturally formed inside the bottle main body (100) on both the left and right sides of (0). This communication groove (13
0) acts as an air flow groove when pouring out the contents, and facilitates replacement of the air with the contents. Further, since the peripheral wall shape of the handle mounting recessed portion (110) protruding inside the bottle is substantially spherical or substantially elliptical, the flow of the content is less obstructed, and as a result, the content is poured. When ejected, unlike the conventional biaxially stretch blow-molded bottle with a handle, the contents are unlikely to project.

[0011]

EXAMPLE First, in order to manufacture a separate handle according to this example, as shown in FIGS. 1 (a), 1 (b), 1 (c) and 1 (d), an ellipse of a bottle body (100) was formed. An elliptical mounting part (210) in which a vertical fitting (230) having fitting parts that fit in four directions is provided on the left and right sides of the central peripheral wall (120) of the planar grip mounting concave part (110). And a grip portion (2) having a positioning hole (221) through which the positioning pin of the mold fits.
20), a separate handle (200) shown in FIGS. 2 (a), (b), (c) and (d) was produced by injection molding using polyethylene terephthalate.

Next, as shown in FIGS. 3 (a) and 3 (b), it is provided in the central portion above the cavity (311) of the die rear side die (310) of the biaxial stretch blow molding die (300). The prepared separate handle (200) was mounted in the elliptic handle mounting recess (312) having the protruding positioning pin (313). In addition, this handle mounting recess (31
2) is further provided with a vacuum hole (not shown),
The grip (200), which was a separate body, was adsorbed so as not to be displaced due to a preform (400) that expands during molding. Also, the attachment portion (210) of the separate handle (200)
The back surface of No. 1 was supported by the tip of the positioning pin (313) to prevent deformation by blow pressure during molding.

Next, as shown in FIG. 4, a neck die (33
The preform heated to the drawing temperature is hung on (0) and clamped, the preform (400) is drawn in the drawing lot (not shown) in the longitudinal direction, and the bottle body is blow-molded to obtain the shape shown in FIG. Biaxially stretched blow-molded bottle with handle shown in (a) (1
0) was prepared. In the production of the biaxially stretch blow-molded bottle with a handle of this example, the continuous moldability is very good, and the peripheral wall of the handle mounting recess of the bottle body is elliptical, The wall thickness was uniform throughout.

In order to evaluate the produced biaxially stretch blow-molded bottle (10) with a handle shown in FIG. 1 (a), hot water was filled at a filling temperature of 40 ° C. and a spout (150) was capped (not shown). It was sealed with (No.), cooled, and then passed through a normal distribution process. Then, the bottle was shaken by holding the handle, the container was opened, and the contents were poured out, but as shown in FIG. 1 (a), Recessed portion (11) for attaching the handle of the bottle body (100)
Since the thickness of the peripheral wall (120) of (0) is uniform throughout and is uniform in strength and is not easily deformed, there is no wobbling of the handle (200), and there is no fear of detachment of the handle.
As shown in (b), (c) and (d), a vertical communication groove (130) is formed inside the bottle body (100) on both the left and right sides of the handle (200) attached to the bottle body (100).
Since it was formed, the contents did not protrude at the time of pouring.

[0015]

The biaxially stretch blow-molded bottle with a handle according to the present invention has a peripheral wall of a concave portion for attaching a handle of the bottle body which is substantially spherical or elliptical, and therefore is attached to the handle when the bottle body is molded. The thickness of the recess for use becomes uniform throughout,
The strength of the peripheral wall with the handle attached is also uniform. As a result,
When pouring out or carrying the contents of the bottle, the handle will not wobble and it will be difficult to use, and there will be no fear that the handle will come off.

In the biaxially stretched blow-molded bottle with a handle of the present invention, vertical communication grooves are formed inside the bottle main body on both the left and right sides of the handle attached to the bottle main body. When pouring out the contents, it works as an air circulation groove, and it becomes easy to exchange the air with the contents. In addition, since the peripheral wall of the handle mounting recess that projects inside the bottle is approximately spherical or elliptical, it does not obstruct the flow of the contents, and as a result, the contents are poured from the bottle. In doing so, the protrusion of the contents unlike the conventional biaxially stretch blow-molded bottle with a handle hardly occurs.

In the biaxially stretch blow-molded bottle with a handle of the present invention, as shown in FIG. 5 (a), the width (W + α) of the fitting portion (231) of the fitting (230) is the fitting portion of the grip. (21
0) is spherical or almost elliptical, so that FIG.
The width (W) of the fitting portion (531) of the fitting (530) in the case where the fitting portion (510) of the conventional biaxially stretched blow molded bottle with a handle shown in FIG. When molding the bottle, the meat on the peripheral wall of the bottle body is
It is easy to get around to 1) and the handle can be firmly fitted to the bottle body, so the handle does not easily come off during use.

[Brief description of drawings]

FIG. 1 (a) is a side view in which a part of a biaxially stretch blow-molded bottle with a handle according to an example of the present invention is cut away, and FIG.
Is a sectional view taken along the line A-A ′, and FIG.
It is a B'sectional view, (d) is CC 'sectional view.

2A is a cross-sectional view of a separate handle used in the embodiment, FIG. 2B is a plan view of the handle, and FIG.
Is a plan view of the handle, and (d) is a cross-sectional view of the handle along DD ′.

FIG. 3 is a plan view of a biaxial stretch blow molding die on a handle mounting side in an example, (a) shows a state where a separate handle is not mounted in the die, and (b) shows (b). , Shows the state when the handle is mounted in the handle mounting recess in the mold.

FIG. 4 is a schematic view of a biaxially stretched blow molding die according to an embodiment.
It is sectional drawing which shows the state which attached the preform and the handle of another body.

FIG. 5A is a cross-sectional view of the vicinity of the fitting of the grip having an elliptical handle as used in the embodiment, and FIG. 5B is the vicinity of the fitting of the grip having a conventional flat grip. FIG.

[Explanation of symbols]

 10 …… Biaxial stretch blow molded bottle with handle 100 …… Bottle body 110 …… Grip mounting recess 120 …… Peripheral wall 130 …… Communication groove 140 …… Bottle parting line 150 …… Spout 200,500… ... Handle 210, 510 ... Mounting part 220 ... Handle part 221 ... Positioning hole 230, 530 ... Mating element 231, 531 ... Fitting part 300 ... Biaxial stretch blow molding die 310 ... Rear of body part Side mold 320 …… Body part side mold 311 …… Cavity 312 …… Grip mounting recess 313 …… Positioning pin 314 …… Guide pin 315,325 …… Mold parting line 330 …… Neck mold 340 ... Bottom mold 400 ... Preform PL ... Parting line

Claims (2)

[Claims] 1. A biaxially stretched blow-molded bottle with a handle, wherein a separate handle is insert-molded in a recess for mounting the handle provided on the rear wall of the bottle body. It has a fitting part that fits, has vertical communication grooves inside the bottle body on both left and right sides of the handle attached to the bottle body, and has vertical parting lines on the left and right side walls of the bottle body, A biaxially stretched blow-molded bottle with a handle, wherein the shape of the peripheral wall of the handle mounting concave portion of the bottle body is substantially spherical or elliptical. 2. A biaxially stretch blow-molded bottle with a handle, wherein a separate handle is insert-molded in a handle mounting recess provided on the rear wall of the bottle body, and the bottle mounting wall is provided with a bottle peripheral wall at the handle mounting portion. It has a connector that has a fitting part in all four directions, and has vertical communication grooves inside the bottle body on both left and right sides of the handle attached to the bottle body. A biaxially stretched blow-molded bottle with a handle, which is provided on the left and right side walls of the bottle, and in which the peripheral wall shape of the handle mounting concave portion of the bottle body is substantially spherical or elliptical.