JP2992721B2 - Plastic bottle with handle - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plastic bottle with a handle, and more particularly, to a plastic bottle with a handle in which a handle is fused to a handle mounting portion provided on the body of a bottle body formed by blow molding a polyester resin.

[0002]

2. Description of the Related Art Conventionally, as a plastic bottle with a handle, a bottle in which a handle mounting portion is formed in a body portion of a bottle body formed by blow molding a polyester resin and a handle is attached to the recess has been used in many cases.

As a method of manufacturing a plastic bottle with a handle made of polyester resin, a handle formed in advance is placed in a mold for blow-molding the bottle body, and a pressurized fluid is blown into a parison to blow-mold the bottle body. In doing so, a method of fitting and attaching the handle mounting part and the bottle body wall surface, or placing the bottle body previously formed into a predetermined shape by blow molding in the mold for handle molding, In general, a resin is injected or injected into a handle-shaped cavity provided adjacent to the bottle, the resin is brought into contact with the bottle body, and the two are melt-bonded at the temperature and pressure of the resin to be integrated. .

[0004]

In the above two methods,
The former has difficulty in positioning the handle, which causes the handle to come off, and the latter has a complicated shape of the handle mounting part of the bottle body, or both are fused on the surface. There was a problem that the handle was easily detached.

Further, in both cases, when a shocking external force such as a drop is applied to the bottle main body, the fitting portion between the bottle main body and the handle is detached, the fusion portion is broken, and the handle is broken. Sometimes it came off.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a plastic bottle with a handle which can easily and reliably mount the bottle body and the handle, and which can prevent the handle from coming off by improving the mounting strength of the both. I have.

[0007]

In order to achieve the above-mentioned object, a plastic bottle with a handle of the present invention is a plastic bottle with a handle, wherein a handle is fused to a body of a bottle body blow-molded with a polyester resin. A fitting recess for fitting a handle mounting portion is formed in the body side wall of the bottle body, and when the bottle body is placed in a mold for forming a handle to form a handle, A part of the molten resin for forming the mounting portion flows into the fitting concave portion of the bottle body, the two are fused at the temperature of the handle forming molten resin, and the entrance portion of the fitting concave portion is shrunk so that the handle is reduced. Is characterized in that the distal end of the mounting portion is fitted in the fitting concave portion in a non-removable state.

[0008]

[Operation] According to the above configuration, the bottle body and the handle are
Since the handle is integrated by fusion and fitting, the handle mounting strength is improved and the handle can be prevented from coming off. Further, the structure of the handle mounting portion of the bottle body is simplified, and the positioning of the handle can be performed reliably.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in more detail with reference to an embodiment shown in the drawings.

FIG. 1 is a partially cutaway front view of a main part of a plastic bottle with a handle, showing a state of forming a handle.
FIG. 3 is an enlarged front view of a handle mounting portion, and FIG. 3 is a sectional view of a handle forming die.

The plastic bottle with a handle is a bottle body 10 obtained by blow molding a parison made of a polyester resin, for example, polyethylene terephthalate resin.
And a handle 20 obtained by injection molding. In addition, it is preferable that the same kind of resin as the bottle body 10 is injection-molded because both are easily fused.

The bottle main body 10 has a recess 11 for attaching a handle above the body, and a fitting recess 12 for fitting an attachment portion 21 of a handle 20 above and below the recess 11. Are formed. When the bottle main body 10 is blow-molded, the fitting concave portion 12 is formed in a concave or groove shape having a simple shape as shown in FIG. The handle 20 is formed in such a size that the front end of the mounting portion 21 of the handle 20 can be fitted when the inlet portion 12a described later contracts.

The handle 20 is provided with the attachment portions 21 above and below a hand holding portion 22. As shown in FIG. 3, a handle forming die 30 in which a preformed bottle body 10 is arranged is used. Injection molded.

The handle forming mold 30 has a holding portion 31 for disposing the bottle body 10 formed in the predetermined shape and a handle forming cavity 32. A flow path 33 for molding the mounting portion 21 and allowing the molten resin to flow into the fitting concave portion 12 is provided at a position corresponding to.

In the handle-forming die 30 having the above-described configuration, the preformed bottle body 10 is arranged at a predetermined position, and an internal pressure capable of withstanding the injection pressure at the time of the handle forming is formed in the bottle body 10. When the molten resin is injected into the cavity 32 from the injection port 34 in the applied state, the molten resin fills the cavity 32 to form the handle 20 and at the same time, a part of the molten resin flows from the flow path 33 to the bottle body 10. It flows into the fitting recess 12.

As a result, the surface of the fitting recess 12 is melted and fused at the temperature of the molten resin.
The inlet portion 12a of the handle 20 contracts and the tip 21a of the attachment portion 21 of the handle 20 is fitted into the fitting recess 12 in a non-removable state.

As described above, when the handle 20 is formed, the mounting portion 21 of the handle 20 and the fitting recess 12 of the bottle body are fused together, and the heat of the injection molding is used to form the fitting recess 2.
The front end 21a of the mounting portion 21 is contracted by
The bottle body 10
The mounting strength between the handle and the handle 20 can be greatly improved.

Further, since the bottle main body 10 only needs to form the fitting concave portion 12 corresponding to the mounting position of the handle 20, the mold for blow molding may have a simple structure, and the mold for blow molding may be used. The mold 30 also needs only to be provided with the flow path 33 corresponding to the fitting concave portion 12, so that it has a simple structure.

Further, since the bottle body 10 is arranged in the handle forming die 30 and the handle 20 is formed, both can be reliably positioned.

[0020]

As described above, in the plastic bottle with a handle of the present invention, the molten resin for forming the handle flows into the fitting recess formed in the bottle body to fuse them together. The inlet part of the fitting recess is contracted at the temperature and fitted in a non-removable state, and the bottle body and the handle are joined by fusion and fitting, so the mounting strength can be greatly improved and the handle is prevented from coming off can do.

Further, the shape of the bottle body can be simplified as compared with the conventional fitting type, and the positioning of the handle can be performed reliably.

[Brief description of the drawings]

FIG. 1, showing an embodiment of the present invention, is a partially cutaway front view of a main part of a plastic bottle with a handle, showing a state when a handle is formed.

FIG. 2 is an enlarged front view of a handle mounting portion.

FIG. 3 is a cross-sectional view of a handle forming die.

[Explanation of symbols]

10: Bottle body 11: Recess for attaching handle 12
... fitting recess 12a ... entrance 20 ... handle 21 ... mounting part 21a ... tip 22
... Hand-held part 30 ... Handle forming die 31 ... Holding part 32 ... Cavity 33 ... Flow path

Claims (1)

(57) [Claims] 1. A fitting for fitting a handle mounting portion to a body side wall of a bottle body in a plastic bottle with a handle fused to a body portion of a bottle body blow molded with a polyester resin. When forming a recess and forming the handle by placing the bottle body in a handle forming mold, a part of the molten resin that forms the mounting portion of the handle flows into the fitting recess of the bottle body. And melting the resin at the temperature of the grip-forming molten resin, and shrinking the entrance of the fitting recess to fit the tip of the mounting portion of the handle into the fitting recess in a non-removable state. A plastic bottle with a handle.