JPH05262353A - Plastic bottle with handgrip - Google Patents

Abstract

PURPOSE:To mount easily and reliably a handgrip to a bottle body and enhance the mounting strength of both the handgrip and the bottle body in a plastic bottle with a handgrip welded to a trunk section of the bottle body. CONSTITUTION:A fitting recess 12 for mounting a handgrip is formed on a bottle body 10 and, when the handgrip 20 is molded, a part of molten resin for molding a mounting portion 21 of the handgrip 20 is cast into the fitting recess 12 to weld both the mounting portion and the fitting recess together by utilizing a temperature of the resin. An inlet opening 12a of the fitting recess 12 is contracted to fit a top end 21a of the mounting portion 21 in the fitting recess 12 in a non-withdrawable state.

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 main body formed by blow molding a polyester resin is provided with a recess for mounting the handle, and the handle is attached to the recess.

As a method of manufacturing this plastic bottle with a handle made of polyester resin, a preformed handle is placed in a mold for blow molding the bottle body, and a pressure fluid is blown into the parison to blow mold the bottle body. In this case, a method of fitting the attachment part of the handle and the wall surface of the bottle main body to integrate them, or disposing a bottle main body previously formed in a predetermined shape by blow molding in a mold for forming the handle, A general method is to inject or inject a resin into a handle-shaped cavity provided adjacent to the container, bring the resin into contact with the bottle body, and melt and bond the two together at the temperature and pressure of the resin to integrate them. ..

[0004]

In both of the above methods,
The former has difficulty in positioning the handle, which causes problems such as the handle coming off, and the latter has the problem that the shape of the handle attachment part of the bottle body is complicated, or both are fused on the surface. There was a problem that the handle would come off easily.

Furthermore, in both cases, when a shocking external force such as a drop is applied to the bottle body, the fitting portion between the bottle body and the handle is disengaged, the fused portion is broken, etc. Sometimes it came off.

Therefore, an object of the present invention is to provide a plastic bottle with a handle which can easily and surely attach the bottle body to the handle and which can improve the attachment strength of both to prevent the handle from coming off. There is.

[0007]

In order to achieve the above object, the plastic bottle with a handle of the present invention is a plastic bottle with a handle in which the handle is fused to the body of a bottle body formed by blow molding a polyester resin. On the side wall of the body of the bottle body, a fitting recess for fitting a mounting portion of the handle is formed, and when the handle is formed by placing the bottle body in a mold for shaping the handle, A part of the molten resin that molds the mounting portion is caused to flow into the fitting recess of the bottle body to fuse the two at the temperature of the handle molding molten resin, and at the same time shrink the inlet of the fitting recess to handle the grip. It is characterized in that the tip of the mounting portion is fitted into the fitting recess in a non-detachable state.

[0008]

[Operation] According to the above configuration, the bottle body and the handle are
Since they are integrated by fusion and fitting, the attachment strength of the handle is improved and the detachment of the handle can be prevented. In addition, the structure of the handle attachment portion of the bottle body is simplified, and the handle can be reliably positioned.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in more detail below based on an embodiment shown in the drawings.

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

The plastic bottle with a handle is a bottle body 10 obtained by blow molding a parison made of polyester resin such as polyethylene terephthalate resin.
And the handle 20 obtained by injection molding are integrated. It should be noted that it is preferable to injection-mold the same resin as that of the bottle body 10 because the two easily fuse together.

The bottle body 10 is formed with a recess 11 for mounting a handle above the body, and a recess 12 for fitting the mounting part 21 of the handle 20 above and below the recess 11. Are formed. The fitting concave portion 12 is formed in a simple concave portion or a concave groove shape as shown in FIG. 3 when the bottle body 10 is blow-molded, and a molten resin for molding the handle 20 flows in. It is possible, and is formed in a size such that the tip of the attachment portion 21 of the handle 20 can be fitted when the inlet portion 12a described later is contracted.

Further, the handle 20 is provided with the mounting portions 21 above and below a hand-holding portion 22, and as shown in FIG. 3, a handle forming mold 30 in which a preformed bottle body 10 is arranged is used. Injection molded.

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

In the handle forming die 30 having the above structure, 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 forming the handle is provided in the bottle body 10. When the molten resin is injected from the injection port 34 into the cavity 32 in the applied state, the molten resin fills the inside of 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 main 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, and further the fitting recess 12 is formed.
The inlet portion 12a of the handle contracts and the tip 21a of the mounting portion 21 of the handle 20 is fitted into the fitting recess 12 in a non-pulled-out state.

As described above, when the handle 20 is molded, the mounting portion 21 of the handle 20 and the fitting recess 12 of the bottle body are fused together, and the fitting recess 2 is formed by the heat during injection molding.
1. The inlet portion 12a of No. 1 is contracted so that the tip 21a of the mounting portion 21
The bottle main body 10
The attachment strength between the handle 20 and the handle 20 can be significantly improved.

Further, since the bottle body 10 only needs to be provided with the fitting recessed 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 handle molding may be formed. The mold 30 also has a simple structure because it only needs to be provided with the flow path 33 corresponding to the fitting recess 12.

Furthermore, since the bottle body 10 is placed in the handle forming mold 30 to form the handle 20, both can be reliably positioned.

[0020]

As described above, in the plastic bottle with the handle of the present invention, the molten resin for forming the handle is caused to flow into the fitting recess formed in the bottle body to fuse the two together, and at the same time, The inlet of the fitting recess is shrunk at a temperature to fit it in a non-detachable state, and the bottle body and handle are joined by fusion and fitting, so the mounting strength can be greatly improved and the handle can be 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 handle can be positioned reliably.

[Brief description of drawings]

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

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 mounting handle 12
... recessed portion for fitting 12a ... entrance portion 20 ... handle 21 ... mounting portion 21a ... tip 22
... Handholding part 30 ... Handle forming mold 31 ... Holding part 32 ... Cavity 33 ... Flow path

Claims (1)

[Claims] 1. A plastic bottle with a handle, in which a handle is fused to the body of a bottle body blow-molded of polyester resin, for fitting a fitting part of the handle to the side wall of the body of the bottle body. When forming a recess and arranging the bottle body in a mold for forming the handle and forming the handle, a part of the molten resin forming the mounting portion of the handle flows into the fitting recess of the bottle body. Then, both of them are fused at the temperature of the handle forming molten resin, and the inlet of the fitting recess is contracted so that the tip of the handle mounting portion is fitted into the fitting recess in a non-detachable state. A characteristic plastic bottle with a handle.