JP4266433B2 - Preform for container forming with handle - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a container-forming preform with a handle, and more particularly to a container-forming preform with a handle in which a ring portion formed on a handle can be attached to a trunk portion.
[0002]
[Background Art and Problems to be Solved by the Invention]
Synthetic resin containers are widely used in place of glass bottles, and handles having a large capacity are integrally formed.
[0003]
As a structure in which the handle is integrated with the container body, a structure as shown in Japanese Patent Publication No. 63-11219 is known.
[0004]
In the technique disclosed in the publication, a handle having a ring portion is inserted from the bottom side of the preform, and the upper surface of the ring portion is brought into contact with a flange portion formed at the lower end of the neck portion of the preform.
[0005]
Then, in the subsequent blow molding process, the ring portion is sandwiched between the urung portion and the side wall by bringing the side wall of the blow molded container into contact with the lower surface of the ring portion.
[0006]
In this case, it is necessary to hold the handle on the preform body by matching the inner diameter of the ring portion with the outer diameter of the preform body to which the ring portion is attached.
[0007]
However, when the inner diameter of the ring part and the outer diameter of the preform part to which the ring part is attached are matched, the ring part is preformed in a state where the preform is heated to an appropriate temperature for blow molding, for example. When inserting from the bottom side of the container, the ring part comes into contact with the surface of the preform, and the surface of the preform is scratched on the product surface of the container, resulting in a reduction in product quality. .
[0008]
Also, if the inner diameter of the ring part is slightly smaller than the outer diameter of the body part of the preform to which this ring part is attached due to the molding conditions when molding the handle, the ring part may not be securely attached. Even if it can be mounted, there is a problem that the mounting becomes defective.
[0009]
The object of the present invention is to prevent the ring part from coming into contact with the surface of the preform and scratching the surface of the preform when inserting the handle ring part into the preform, thereby improving the quality of the container. In addition, a container-forming container with a handle that can be securely attached even if the inner diameter of the ring part is slightly smaller than the outer diameter of the preform body to which the ring part is attached depending on the molding conditions at the time of the handle molding. To provide renovation.
[0010]
[Means for Solving the Problems]
In order to achieve the above object, a preform for forming a container with a handle according to the present invention is:
In a preform for forming a container with a handle, which has a neck portion including an opening and a bottomed cylindrical trunk portion connected to the neck portion, and a ring portion formed on the handle can be attached to the trunk portion.
The ring portion mounting portion of the body portion has an engaging protrusion that engages with the inner surface of the ring portion.
[0011]
According to the present invention, an engagement protrusion that engages with the inner surface of the ring portion is provided on the ring portion mounting portion of the preform body portion, thereby engaging between the outer diameter of the preform body portion and the inner diameter of the ring portion. An interval corresponding to the protrusion amount of the protrusion can be provided.
[0012]
Therefore, when inserting the ring part of the handle from the bottom side of the preform, since the inner diameter of the ring part is sufficiently large, the blow part is prevented from coming into contact with the surface of the preform and scratching the surface of the preform. The product quality of the molded container can be improved.
[0013]
In addition, even if the inner diameter of the ring portion of the handle is slightly reduced depending on the molding conditions when the handle is molded, the ring portion may be deformed by the engagement protrusion, so that the mounting cannot be performed or the mounting is poor. The situation can be prevented and reliable mounting can be performed.
[0014]
Furthermore, since the ring part is attached by engaging with the engaging protrusion, the preform body can be unrelated to the attachment of the handle, and therefore it is necessary to adjust the thickness of the preform. Also, the mold can be processed freely.
[0015]
Furthermore, even when it is desired to adjust the outer diameter for receiving the ring portion, it is only necessary to adjust the protruding amount of the engaging protrusion, so that the mold can be processed regardless of the thickness of the preform.
[0016]
In the present invention, it is preferable that a stopper for positioning and mounting the ring portion is provided, and the engaging protrusion is formed adjacent to a bottom portion side of the stopper.
[0017]
By doing in this way, the attachment position of a ring part can be prescribed | regulated reliably with a stopper.
[0018]
In the present invention, it is preferable that the engaging protrusion is formed as a protrusion extending in the width direction of the ring portion.
[0019]
By doing in this way, it becomes possible to maintain the stable attachment state of a ring part.
[0020]
Furthermore, in the present invention, it is preferable that the engaging protrusion is formed to be inclined downward toward the bottom side of the trunk portion.
[0021]
By doing so, it is possible to easily and smoothly mount the ring portion on the engaging protrusion.
[0022]
Furthermore, in the present invention, it is preferable that a plurality of the engaging protrusions are formed in the circumferential direction.
[0023]
In this way, it is possible to ensure a uniform mounting state in the circumferential direction of the ring part, and even if the ring part is somewhat smaller due to molding conditions when molding the handle, a plurality of Since the ring portion is deformed by the engaging protrusion, it is possible to prevent the situation where the mounting cannot be reliably performed or the mounting becomes defective even if the mounting can be performed, and the reliable mounting can be performed.
[0024]
In the present invention, it is preferable that the engaging protrusion has a circular cross section.
[0025]
By doing in this way, the part which contacts the ring part inner surface in an engagement protrusion is small, and resistance at the time of insertion can be reduced, and insertion can be made easy.
[0026]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[0027]
FIGS. 1-4 is a figure which shows the preform for container forming with a handle which concerns on one embodiment of this invention.
[0028]
FIG. 1 is a view showing a preform with a handle and a partial outline of a container in which the preform is blow-molded. FIG. 2 is a view showing a state in which the handle is attached to the preform.
[0029]
As shown in FIG. 1, the preform 10 has a neck portion 12, a body portion 14 connected to the neck portion 12, and a bottom portion 24.
[0030]
The neck portion 12 is a portion to which a cap is attached, and has an opening portion 16 on the side opposite to the body portion 14.
[0031]
On the outer peripheral surface of the neck portion 12, a support ring 18 is formed at a boundary portion with the body portion 14, and a screw portion 20 is formed on the opening portion 16 side. Further, the screw portion 20 and the support ring 18 are connected to each other. A locking ring 22 is formed in the intermediate region.
[0032]
The trunk | drum 14 is made into the bottomed cylindrical shape which has the bottom part 24 integrally.
[0033]
Further, a handle 26 is attached to the body portion 14, and the attachment portion 28 to which the handle 26 is attached is provided with an attachment positioning stopper 30 at the end of the support ring 18. Protrusions are formed.
[0034]
Further, the mounting portion 28 is provided with an engagement protrusion 32 that engages with the handle 26 (specifically, an inner surface of a ring portion 34 described later of the handle 26).
[0035]
The engagement protrusion 32 is formed adjacent to the bottom 24 side of the stopper 30 and is formed as a protrusion extending in the axial direction of the preform 10 (the width W direction of the ring portion 34 described later).
[0036]
Further, as shown in FIG. 4, a plurality of, for example, 8 engagement protrusions 32 are formed in a circular arc cross section at equal intervals in the circumferential direction. Can be reduced, and the resistance during insertion can be reduced.
[0037]
Further, as shown in FIG. 3, the engaging protrusion 32 is formed to be inclined downward by a predetermined angle θ toward the bottom portion 24 side of the body portion 14.
[0038]
Further, the end portion on the bottom 24 side of the engagement protrusion 32 is formed in a curved shape with a predetermined roundness, thereby facilitating insertion of the ring portion 34.
[0039]
The handle 26 is inserted into and attached to the attachment portion 28 of the trunk portion 14 of the preform 10, a grip portion 38 extending from the ring portion 34 along the outer diameter of the trunk portion of the container 36, and a grip An engaging portion 40 is formed at the end of the portion 38 opposite to the ring portion 34 and is engaged with the container 36 at the time of blow molding.
[0040]
The ring portion 34 has a predetermined width W as shown in FIG. 2 and an inner diameter that can be inserted into the body portion 14 of the preform 10, which is substantially the same as the outer diameter of the protruding end position of the engaging protrusion 32 here. It is the inner diameter.
[0041]
The engaging portion 40 has a shape bent from the grip portion 38 toward the central axis of the ring portion 34.
[0042]
The grip 26 is attached to the preform 10 as follows.
[0043]
First, as shown in FIG. 2, for example, the preform 10 is heated up to a suitable temperature for blow molding in an inverted state at the heating position, and then conveyed to the handle insert position and stopped at the handle insert position.
[0044]
At the handle insert position, the lifting means for holding the handle 26 in an inverted state, i.e., with the ring portion 34 down, stands by above the transport position.
[0045]
When the preform 10 stops at the handle insert position, the elevating means starts to descend while holding the preform 10.
[0046]
As a result, the handle 26 is lowered from above the preform 10, and the ring portion 34 is lowered and inserted into the attachment portion 28 of the preform 10 while the body portion 14 of the preform 10 is inserted.
[0047]
In this case, since the inner diameter of the ring portion 34 is substantially the same as the outer diameter of the protruding end position of the engagement protrusion 32, there is a gap from the surface of the trunk portion 14, and the ring portion 34 is connected to the trunk portion 14. At the time of mounting, the ring portion 34 does not come into contact with the surface of the body portion 14 and is not damaged, so that a good mounting can be performed.
[0048]
Further, since the engaging protrusion 32 formed on the mounting portion 28 is inclined downward toward the bottom 24 side of the body portion 14, the inner surface of the ring portion 34 gradually engages with the engaging protrusion 32. When the stopper 30 is brought into contact with the position, reliable engagement is performed.
[0049]
Further, since a plurality of engaging protrusions 32 are formed in the circumferential direction, the ring portion 34 is linearly deformed between the engaging protrusions 32, so that it is impossible to mount or cause a mounting failure. be able to.
[0050]
Then, the state shown in FIG. 1 is obtained with the handle 26 completely inserted to the stopper 30 position and mounted.
[0051]
In this state, the container 36 is transported to the blow molding position and blow-molded to easily obtain a good quality container 36 with no scratch on the product surface.
[0052]
The present invention is not limited to the above-described embodiment, and can be modified into various forms within the scope of the gist of the present invention.
[0053]
For example, although the shape of the engagement protrusion is a protrusion extending in the width direction of the ring portion, a plurality of engagement protrusions may partially exist in the width direction of the ring portion.
[0054]
In addition, a plurality of, for example, eight engagement protrusions are formed in the circumferential direction, but this number can be selected as appropriate.
[0055]
Furthermore, the engaging protrusion is formed to be inclined downward toward the bottom side of the body portion. However, if the end portion on the bottom side is formed in a curved shape, it is engaged to some extent even if it is not formed in an inclined state. Can be in an easy state.
[0056]
The engagement protrusion may be non-inclined, and the non-inclined one has a sense of stability after mounting the ring portion.
[0057]
In addition, by providing such an engaging projection, the outer diameter of the body portion is even in the case of a thick preform whose outer diameter is larger than the outer diameter of the ring mounting position of the preform, which has been difficult in the past. Forming is possible by forming engagement protrusions having a larger outer diameter.
[0058]
Furthermore, in order to facilitate the mounting of the ring portion, the inner end portion of the ring portion may be finished in a curved shape.
[0059]
In addition to the support ring, a stopper for positioning the ring portion is separately formed on the body portion. By using the support ring also as a stopper, the ring portion can be positioned without forming a separate stopper. be able to.
[0060]
The stopper is not limited to an annular shape, and may be a plurality of protrusions.
[0061]
Furthermore, in the above-described embodiment, the case where the preform is mounted in an inverted state and the handle is mounted from above is described. However, the preform can be mounted in an upright state and the handle can be mounted from below.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing an outer shape of a preform equipped with a handle and a container formed by blow-molding the preform.
FIG. 2 is a cross-sectional view showing a state where a handle is attached to a preform.
FIG. 3 is a partially enlarged longitudinal sectional view showing a state of an engaging protrusion.
FIG. 4 is a partially enlarged cross-sectional view of a preform showing an arrangement state of engagement protrusions in a circumferential direction.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Preform 12 Neck part 14 trunk | drum 16 opening part 24 bottom part 26 handle 28 mounting part 30 stopper 32 engaging protrusion 34 ring part 36 container

Claims (5)

In a preform for forming a container with a handle, which has a neck portion including an opening and a bottomed cylindrical trunk portion connected to the neck portion, and a ring portion formed on the handle can be attached to the trunk portion.
Said barrel portion to engage the-ring inner surface to-ring portion attachment portion, and a plurality of engagement projections formed at intervals in the circumferential direction of the ring portion attachment portion,
The preform for forming a container with a handle , wherein the inner surface of the ring portion is in contact with only the protruding end positions of the plurality of engaging protrusions at the ring portion mounting portion of the trunk portion . In claim 1,
Having a stopper for mounting and positioning the ring portion;
Each of the plurality of engaging protrusions is formed adjacent to the bottom side of the body portion of the stopper. In claim 1 or 2,
Each of the plurality of engaging protrusions is formed as a protrusion extending in the width direction of the ring portion. In claim 3,
Each of the plurality of engaging protrusions is formed so as to be inclined so that the height of the protrusion gradually decreases toward the bottom side of the body part. In any one of Claims 1-4 ,
Each of the plurality of engaging protrusions has an arc-shaped cross section, and a container-forming preform with a handle.

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