JPS6014675Y2 - Saturated polyester resin bottle with handle - Google Patents

Description

[Detailed explanation of the idea] This project relates to a saturated polyester resin plate with a handle.

Recently, handles are often attached to large bottles made of synthetic resin.

The handle is generally molded integrally with the four main bodies during blow molding of large bottles, but it is extremely difficult to mold a saturated polyester resin plate with a handle, especially large bottles, using this method.

In other words, in the case of plates made of saturated polyester resin, the strength of the bottle tends to be lost due to whitening due to crystallization.Also, in order to increase the strength of the bottle, it is usually biaxially stretched during blow molding. This makes it extremely difficult to blow mold the handle together with the weir body.

However, saturated polyester resin plates are suitable for large bottles because the mechanical strength of the bottle is increased by biaxial stretching, and saturated polyester resin does not leak harmful substances such as solvents, so it is easy to use after disposal. There is no generation of toxic gas when incinerated.Therefore, it has been desired to attach a handle to the saturated polyester resin plate.

This proposal is an attempt to comfortably satisfy the rejected request.

The illustrated embodiment will be explained below.

In FIG. 1, 1 is a weir body made of biaxially stretched saturated polyester resin having a capacity of at least 1 liter, 2 is a body portion thereof, 3 is a neck portion having a thread 4 for screwing the cap, An outward flange 5 is provided at the base of the mouth and neck, and small-diameter and large-diameter fitting grooves 6, 7 are provided around the outer flange 5 and on the upper part of the body.

Reference numeral 8 denotes an L-shaped handle (see FIG. 2), which has ring portions 9, 10 of a small diameter and a large diameter at its upper and lower ends, which are fitted and fixed into the fitting grooves 6, 7.

Further, a plurality of protrusions 9a for preventing rotation are arranged on the inner surface of the small diameter ring portion 9 at the upper end, and these protrusions 9a...
- It is cut into the fitting groove 6.

The above bottle may be manufactured as follows.

First, the mouth part 3 and the outward flange 5 are provided in advance,
The parison P shown in FIG. 3, which has a cylindrical shape with a bottom and an opening at the top, is injection molded from saturated polyester resin, and the above-mentioned handle 8 is also injection molded in advance from a suitable synthetic resin.
As shown in FIG. 3, the small diameter ring part 9 at the upper end is fitted into the parison P from below and abutted against the lower surface of the outward flange 5, and the handle 8 is attached to the parison P.

Either before or after the device, the parison is heated to a temperature suitable for expansion.

If the handle is in the way when heating after installation, heat the parison or the handle while rotating it.

It is preferable to apply the heating only to the portion below the outward flange.

However, if the handle is attached immediately after forming the parison and the parison is maintained at a temperature suitable for expansion, there is no need to heat it again.

Next, the heated parison with the handle attached is placed into a blow molding mold together with the handle.

The parison is fitted into the four-body forming cavity, the handle is fitted into the handle fitting groove, and the large ring portion 10 at the lower end of the handle is positioned within the cavity.

In the above state, compressed air is blown into the parison, and if necessary, a stretching rod is inserted to push down the bottom of the parison.
The parison is expanded by stretching it biaxially in both directions.

As a result of the expansion, the two fitting grooves 6.7 are formed corresponding to the two ring parts 9, 10, and the two ring parts 9, 10 are put into a biting state and fixed.

The mold is then opened and the bottle with a handle formed is taken out.

In addition to the above-mentioned manufacturing method, the plate main body and the handle may be formed in advance, and then the plate body and the handle may be forcibly fitted into each other through a fitting groove and a ring portion.

According to the present invention, not only can the handle 8 be provided on the plate body 1 made of saturated polyester resin, but the handle 8 can also be fitted with ring parts 9 and 10 provided on the plate body 1 at the upper and lower ends thereof. It is installed by fitting into the grooves 6 and 7, and a plurality of protrusions 9a for preventing rotation are arranged on the inner surface of the ring portion 9 at the upper end, and these protrusions 9a are inserted into the fitting groove 6. Since the handle 8 is recessed into the plate body, the handle 8 can be firmly and stably attached to the plate body without rotating, and the plate body can be given directionality. Even if the plate body has a large capacity of 1 liter or more, it can have sufficient strength. Also, since the plate body is made of biaxially stretched saturated polyester resin, the mechanical strength is extremely high. Moreover, it is lightweight, does not exude harmful substances such as solvents during use, and does not produce toxic gas when incinerated after disposal.

Furthermore, since the handle is a separate member, it is easy to color code the handles.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention; FIG. 1 is a partially cutaway side view, FIG. 2 is a perspective view of the main part, and FIG. 3 is a longitudinal sectional view of the intermediate material. 1...Plate body, 2...Body part, 3...
... Mouth and neck, 5 ... Outward flange, 6, 7
......Fitting groove, 8...Handle, 9, 10.
...Ring section.

Claims (1)

[Scope of utility model registration request] A weir body 1 made of biaxially stretched saturated polyester resin is provided, and fitting grooves 6,
7, and a handle 8, which is a separate member made of synthetic resin or the like as appropriate, is provided, and the handle 8 has the above-mentioned fitting grooves 6,
A ring part 9 and 10 are provided to fit with the upper ring part 9, and a plurality of protrusions 9 for preventing rotation are provided on the inner surface of the upper ring part 9.
A saturated polyester resin board with a handle, characterized in that the protrusions 9a are fitted into the fitting grooves 6.