JP2696450B2 - Method and apparatus for manufacturing a multi-layer plastic container with a handle - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

The present invention relates to a blow-molded hollow plastic product, and more particularly to a blow-molded hollow plastic product having an integrally formed handle. Background of the Invention and Summary In blow molding of hollow plastic products, it has been common to blow mold a hollow container with an integrally molded handle after sealing a heat tube in a mold. When the tube consists of a single layer of plastic, this
This was easily achieved by cutting the plastic in the area forming the hollow of the handle. However, when a multi-layer plastic with an intermediate plastic layer is required, e.g., having properties such as permeability or other properties, e.g., required to accommodate a solution-type product, the above described It has been found that in order to weld the kerf area, a large and ugly kerf must be provided that forms a seam line that is not only unsightly but also uncomfortable to grip. Furthermore, this configuration weakens the drop test performance of the container.

Accordingly, it is a primary object of the present invention to provide proper chopping; to avoid bulky and unsightly chopping; to have adequate drop test performance; and to minimize the number of handling steps in forming containers. To provide a method and apparatus for forming a multi-layer container having an integrally molded handle. A method and apparatus for manufacturing a multi-layer plastic container with a handle, containing a liquid or the like, according to the present invention, is for sealing a hollow parison of molten plastic at a blow molding temperature, for forming a hollow foil section. ,
When sealing the mold, sandwiching a part of the hollow parison, and at the same time, forming a hollow handle part in the part of the hollow parison while providing a passage from the moil part to the handle part. And then inflating the parison through the moil portion to form a container.

[0003] Referring to illustration 1, container 10 made in accordance with the present invention, and such as a screw 13 on it, the neck namely the mouth portion 12 of the dated fastening means meshing with the cap, integral hollow handle 14, It includes a wall 15 connecting the handle 14 to the hollow body 11. Referring to FIG. 2, the container 1
When 0 is molded, as described herein, the container is:
It includes a hollow foil portion 16 that is connected to both the handle portion 14 and the neck or mouth portion 12 (FIG. 7). further,
The flat plastic part 17 closes the finger entry opening of the handle (FIG. 8). The container must therefore be trimmed to have a shape as shown in FIG. 3 by removing the foil part 16 and the plastic part 17. Throughout the handle, the handle 14 is a multi-layered handle with a smooth continuous surface and these layers of plastic are glued together, as can be seen from FIG. Body 1
1 to form a double-layer wall 15 which is bonded. The container is formed by expanding a parison in a mold section.

Referring to FIG. 5, one mold part 20 will be described.
A hollow portion 21 adapted to form the body of the container, a substantially semi-circular portion 22 adapted to form the mouth portion 12, and a continuous groove forming the handle portion 23, a shallow groove 24 forming the wall 15, and an upper cavity 25 forming part of the moir portion 16.
including. The mold part 20 further comprises a small groove 26 communicating between the moil cavity 25 and the continuous groove 23.
Finally, the mold part 20 is provided with a guide part 27 for receiving the blowpipe 28.
including. The parison can also include an extruded tube of plastic at the blow molding temperature. When parts of the mold are closed around the parison, the lower part of the parison is pinched by strict chopping and the body 1 of the container is closed.
1 and the top is sandwiched to form a moir portion 16,
The middle part is sandwiched between the handle 14, the shallow groove 2 forming the wall
4 and the flat plastic part 17 while the small groove 26 forms a passage 30 between the cavity 25 of the foil and the groove 23 of the handle. Therefore, as shown in FIG. 6, when the blow tube 28 is inserted to blow-mold the container,
The expanding fluid flows from the inside of the hollow moil portion 16 to the inside of the body 11 and also through the hollow portion 29 formed by the passage 30 to the inside of the handle, so that the handle expands outward. Let me do.

[0005] After the blow molding, the container is taken out of the mold, and the moir portion 16 and the flat plastic wall portion 17 are trimmed by cutting, and the mouth portion 12 is trimmed. The resulting container has a handle without a rough seam line in the area of the upper part of the handle touched by a finger (FIG. 4). Strict cutouts in the wall 15 that are required to maintain properties such as transparency are in areas that are not touched by multiple fingers as described above. Thus, the container was made more comfortable to hold, not ugly, had adequate drop test performance, and was manufactured with minimal handling steps.

[Brief description of the drawings]

FIG. 1 is a perspective view of a container embodying the present invention.

FIG. 2 is a perspective view of the container after being blown and before being trimmed.

FIG. 3 is a partial elevational view of the container.

FIG. 4 is a partial cross-sectional view taken along line 4-4 in FIG. 3;

FIG. 5 is a partial plan view of a mold for molding the container.

FIG. 6 is a partial plan view showing the container in the mold portion after being blown.

FIG. 7 is a partial cross-sectional view taken along line 7-7 of FIG. 6 in place with respect to other mold parts;

FIG. 8 is a partial cross-sectional view taken along line 8-8 of FIG. 6 in place with respect to another mold part;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Container 11 Hollow main body 12 Neck or mouth part 13 Screw 14 Integrally formed hollow handle 15 Wall 16 Hollow moil part 17 Flat plastic part 18 Smooth continuous surface 20 Mold part 21 Hollow part 22 Semicircular part 23 Continuous groove 24 Shallow groove 25 Upper cavity or moil cavity 26 Groove 27 Guide part 28 Blowing tube 29 Hollow part 30 Passage

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification number Agency reference number FI Technical display location B65D 85/72 B65D 85/72 Z // B29L 22:00

Claims (8)

(57) [Claims] 1. A method of manufacturing a plastic container , comprising providing a hollow parison of molten plastic material at a blow molding temperature, a hollow mould portion, an integrally molded neck portion, and a body.
Forming a portion , sandwiching a portion of the hollow parison between the mold portions, the hollow moire portion passing through the neck portion and the body
A first integral molded double-layer wall portion during said sandwiching period.
An integrally formed hollow handle portion coupled to the body portion
Forming the first integrally formed wall portion,
The hand is separated from the main body.
Ri, the handle portion, the second integral double layer wall portion,
Coupled to the hollow foil section and during pinching of the hollow parison section,
Forming a passage between the layers of the part, wherein the passage is between the hollow foil part and the handle part
And then the gas pressure passes through the moir section and through the neck section
To pass into, by applying gas pressure to the hollow moil portion, der inflating the hollow parison
The gas pressure then flows through the neck to the body and
Is formed, and through the hollow foil portion, the second
Into the passage in the part of the wall of the second, then through said passage,
The handle part enters and the handle part expands, where the gas pressure is
Only from the passage in the second wall portion is applied to the handle portion
That, inflating the hollow parison intended to include. 2. The step of providing a hollow parison comprises:
Includes providing a multi-layer parison, forming a handle portion
The step of sandwiching the hollow parison, wherein the double-layer wall is
To include a continuous multilayer connecting the handle part and the body part
And the first body portion and the handle portion are connected to each other.
The method of claim 1, wherein the method is adapted to form a unitary bilayer wall portion . Wherein the hollow moil portion, the portion of the neck, and the method according to any one of claims 1 and 2 includes the step of trimming the various regions surrounding the handle. 4. An apparatus for manufacturing a plastic container with a handle, comprising: a plane-symmetrical mold portion adapted to seal around a hollow parison; and a hollow portion adapted to form a body of the container. ,
A substantially semi-circular portion adapted to form a portion of the mouth of the container, a continuous groove forming a portion of the handle, a shallow groove forming a wall surrounded by the handle, and a moir portion and a moir cavity; An upper cavity forming a portion of the groove providing a passage in the blow molded container between the groove cooperating to form the handle;
The mold is further provided with a gas pressure to the moil portion.
That blowpipe provided with guide portions for receiving the, hence the mold section
The hollow portion of the molten plastic material is at the blow molding temperature
When sealed around the parison, one of the hollow parisons
The part is sandwiched between the above mold parts to form a hollow foil part
The neck part and the book
The body forming part is connected to the body part through the neck part.
Entangled and pinched period of the first integrally formed double layer wall portion
Forming an integrally formed hollow handle portion therein;
The molded double-layer wall portion separates the handle from the body
Isolate and bind the handle part to the moir part
Forming a second integrally formed double layer wall portion,
A layer of a second wall portion extending between the minute and the handle portion
With a hollow passage between it and the parison applying gas pressure
When the gas pressure is expanded by the
Body part, then through the neck part
To form a flow container and pass through the hollow foil section
To enter the passage in the second wall portion, and then
Via the handle portion, the handle portion expands, and
Gas pressure is applied to the handle only from the passage in the second wall
Each of the above-mentioned mold parts to be applied . 5. A hollow blow-molded plastic product, comprising: a hollow body portion, an integrally molded neck portion, an integrally molded hollow handle portion coupled to the body portion by an integrally molded wall, and the handle portion defined by the integral molded wall. An integrally formed hollow moil portion coupled to the neck portion, and an integrally formed passage for integrally forming communication between the hollow moil portion and the hollow handle portion ;
A passage is provided as the only passage to the handle
That the hollow blow-molded plastic products. 6. The blow-molded product comprises a multilayer wall, an inner portion of the handle that is smooth and unsealed, and the handle is joined to the body portion comprising a double layer of plastic with each layer being multilayered. intermittent walls include, blow molded product according to claim 5. 7. A blow molded hollow container, comprising: a hollow body portion; an integrally formed handle connected to the hollow body portion by an integrally formed wall; a neck portion integrally connected to the hollow body portion; An integrally formed wall that is provided with an opening for receiving a seamless hand and that joins the handle to the body portion having a double layer , wherein the handle portion and the body portion have between them.
There is no passage in the blow molded hollow container. 8. The container according to claim 7, wherein said container has a multilayer wall throughout, and said wall portion connected to said handle has a double multilayer structure.