WO2023229120A1

WO2023229120A1 - Preform having integral handle

Info

Publication number: WO2023229120A1
Application number: PCT/KR2022/018618
Authority: WO
Inventors: 김두연
Original assignee: 동아정밀공업(주)
Priority date: 2022-05-25
Filing date: 2022-11-23
Publication date: 2023-11-30
Also published as: WO2023229119A1

Abstract

The present invention relates to a preform having an integral handle, comprising: a preform having an overall "U" shape in which the shape of an inlet of a PET container is integrally formed with an inlet hole configured such that a stretch rod can be inserted thereinto; and a handle, formed integrally with the preform, having a fixing piece so that the handle can be drawn into the PET container to be molded when the preform is stretched by the stretch rod. Since the handle is integrally formed with the PET container when injecting the basic preform for molding the PET container, the process of coupling the handle is omitted, and thus the manufacturing process is simplified. In addition, since the PET container and the handle are made of the same material and the preform is stretched by means of the stretch rod to bind the fixing piece when the PET container is molded, durability is enhanced.

Description

Preform with integrated handle

The present invention relates to a preform having an integrated handle, and more specifically, in the injection molding of PET containers such as soy sauce bottles, vinegar bottles, oil bottles, salted fish bottles, and beverage bottles used as product packaging containers, by blowing the handle. When molding the preform of a container, it is molded integrally, so there is no need for separate work to combine the handle, and it improves durability by increasing the rigidity of the handle, while at the same time ensuring stability during handling and use. will be.

The existing plastic bottle handle was formed by molding the plastic bottle and the handle separately and joining them together.

In this way, if the plastic bottle and the handle are individually molded and combined, the work time and production cost are doubled, which is uneconomical.

Looking at the prior art in this field, the handle attachment structure of the PET bottle in Registered Utility Model Publication No. 20-1995-0003566 (announced on May 4, 1995) is a handle (7) attached to a regular PET bottle (1) as shown in Figure 1. ) in attaching; On the outer peripheral surface of the bottle mouth of the PET bottle (1), a cut portion (3) having a locking protrusion (5) is formed, and a cut portion (9), a concave hole (11), and an end are formed on the handle (7) having a clamping ring (8). The mouth part 10 is formed so that the clamping ring 8 of the handle 7 is irreversibly fastened by the fixing pin 13 in a state in contact with the end part 3 of the PET bottle 1. In addition, a handle attachment structure for a plastic bottle was disclosed in which the handle 7 can be fixed without moving by the locking protrusion 5 and the protrusion 4 of the plastic bottle 1.

In Figure 1, a single inlet portion (3) having a locking protrusion (5) is formed on the outer peripheral surface of the bottle mouth of the PET bottle (1), and a cut portion (9) and a concave hole (11) are formed on the handle (7) having a clamping ring (8). ) and the end portion 10 is formed so that the clamping ring 8 of the handle 7 is in contact with the end portion 3 of the PET bottle 1 and is irrevocably fastened by the fixing pin 13. When combining the plastic bottle (1) and the handle (7), ensure that the clamp ring is inserted into the end of the plastic bottle (1), then use the fixing pin (13) to prevent the handle (7) from opening and secure the distal end of the handle (7). is inserted into the groove (6) of the plastic bottle so that the handle (7) is coupled.

This structure of attaching the handle of the plastic bottle of FIG. 1 can prevent the handle (7) from being separated from the plastic bottle (1). If you hold the handle (7) and tilt it to one side while the PET bottle (1) is full of contents, the distal end of the handle (7) will separate from the groove (6), causing the body of the handle (7) and the PET bottle (1) to separate when used. There is a problem in that it is difficult to hold the handle (7) stably because it is spaced apart.

In addition, Figure 1 is a method of forming and combining the plastic bottle (1) and the handle (7), and there is a problem in that productivity and economic efficiency are lowered by performing the work of combining the plastic bottle (1) and the handle (7).

In order to solve the above-described conventional problems, the present invention molds the handle so that when molding a molded product (hereinafter referred to as 'PET container') using a preform, it is formed as an integral piece, making it easy to use without the handle being separated from the PET container. The purpose for which it is done;

When the preform is stretched by a stretch rod, the bottom of the handle is firmly bound by the outer peripheral surface of the PET container to prevent the bottom of the handle from separating when pouring the contents into the PET container. The purpose is to provide a preform with an integrated handle.

The present invention is a means to achieve the above object,

A preform whose overall shape is shaped like a '∪', with an inlet hole formed inside so that a stretch rod can be inserted, and the entrance shape of the PET container is integrally formed; When the preform is stretched by a stretch rod, a fixing piece is provided so that it is drawn into the inside of the PET container and molded, and a handle is formed integrally with the preform. A preform having an integrated handle is provided. .

The handle of the present invention includes a handle body whose one side is integrally fixed to the preform; A fixing piece formed to protrude to one side from the lower part of the handle body to be coupled to the outer peripheral surface of a PET container formed by stretching the preform by a stretch rod; It is characterized in that it is formed to include a support formed to protrude downward from the bottom of the handle body and supported on the outer peripheral surface of the PET container.

The handle body of the present invention is characterized in that it is formed in a round shape to maintain rigidity in the lateral direction.

The handle body of the present invention includes a plurality of gripping protrusions to increase the gripping force and maintain rigidity of the handle; It is characterized by the formation of anti-slip protrusions in the area where the thumb is located, which prevents slipping and increases the grip feeling.

The fixing piece of the present invention is characterized in that it is formed in an 'ㅏ' shape so that the outer peripheral surface of the PET container formed when the preform is stretched by a stretch rod is wrapped and bound to fix the handle.

In the present invention, when the basic preform for molding a PET container is injected, the handle is formed integrally with the PET container, so the process of combining the handle is omitted, which has the effect of simplifying the manufacturing process.

In the present invention, the PET container and the handle are made of the same material, and the preform is stretched by a stretch rod to bind the fixing piece during molding of the PET container, thereby improving durability.

The present invention has the effect of improving the rigidity of the handle itself by the handle shape, thickness, and bending angle when injecting a preform for manufacturing a PET container with an integrated handle 200.

In the present invention, since the PET container is manufactured by injection molding, not only can the thickness distribution of the preform be precisely designed and molded, but the thickness of the PET container is formed evenly, which has the effect of stably maintaining the shape even when filled with contents. There is.

In the present invention, when the preform is molded into a PET container by blow injection, the bottom of the handle is firmly bound by the outer peripheral surface of the PET container by wrapping and joining the fixing piece of the handle, so that the handle is used when pouring the contents of the PET container. This has the effect of making it easy to control the tilt of the PET container stably without separation.

Figure 1 is a perspective view showing a conventional plastic bottle and handle separated.

Figure 2 is a perspective view showing a preform with an integrated handle according to the present invention.

Figure 3 is a cross-sectional view showing the configuration of the preform having the integrated handle of Figure 2.

Figure 4 is a cross-sectional view showing a state in which the preform having the integrated handle of Figure 2 is molded in an injection stretch blow molding machine.

Figure 5 is a cross-sectional view showing a state in which the fixing piece of the handle is bound while the preform of Figure 2 is stretched and molded into a plastic bottle.

〈Explanation of symbols〉

100: Freeform 110: Freeform body

111: Inlet hole 200: Handle

210: Handle body 211: Gripping projection

212: anti-slip protrusion 220: fixed piece

230: Support 300: Injection stretch blow molding machine

310: First mold part 311: Core fixing plate

312: Eject plate 313: Oil seal plate

314: neck ring plate 315: fixing ring

316: Freeform core 317: Slide connecting bar

320: Second mold part 321: Cavity base

322: Cavity 323: Freeform gate insert

324: Preform molded resin hole 325: Handle gate insert

326: Handle molding resin hole 330: Handle mold

331: Neck ring 332: Slide block

333: Handle block 400: PET container

Hereinafter, the configuration of the preform with an integrated handle according to the present invention will be described.

The preform with an integrated handle according to the present invention has an overall shape of '∪' shape, and an inlet hole 111 is formed inside to allow a stretch rod to be inserted, thereby forming the inlet shape of the PET container as one body. The preform 100 and the fixing piece 220 are provided so that when the preform 100 is stretched by a stretch rod, it is inserted into the inside of the PET container 400 and molded, so that it is integrated into the preform 100. It consists of a handle 200 formed of.

The PET container 400 and the handle 200 are made of the same material, and the preform 100 is stretched by a stretch rod to bind the fixing piece 220 during molding of the PET container 400, thereby improving durability. It is characterized in that it can be used stably when the PET container 400 is filled with contents.

A preform having an integrated handle according to the present invention configured with the above features will be described in detail with the accompanying drawings.

Figure 2 is a perspective view showing a preform having an integrated handle according to the present invention, and Figure 3 is a cross-sectional view showing the configuration of the preform having an integrated handle of Figure 1.

2 and 3, the preform having an integrated handle of the present invention includes a preform 100 and a handle 200.

The preform 100 is formed into a preform body 110 with an overall shape of a 'U' shape by an injection stretch blow molding machine 300, and the 'U' of the preform body 110 is formed into a 'U' shape. The entrance shape of the PET container 400 is integrally formed at the top of the shape, and a stretch rod is inserted into the upper part of the 'U' shape when the PET container 400 is molded by the blow method. An inlet hole 111 is formed.

The handle 200 is formed by joining one upper end thereof when the preform 100 is stretched and blown by an injection stretch blow molding machine 300, and is formed as shown in FIG.

The handle 200 has a handle body 210 configured so that one side is integrally fixed to the preform 100, and the preform 100 is stretched and blown by a stretch rod to form the PET container 400. When the PET container 400 is formed by the blow method using the preform 100, a fixing piece 220 is formed to protrude from the bottom of the handle body 210 to one side to be coupled to the outer peripheral surface. A support 230 is formed from the bottom of the handle body 210 toward the bottom to be supported on the outer peripheral surface of the handle 400.

The handle body 210 is formed in a round shape to maintain rigidity in the lateral direction and adheres closely to the user's palm to increase grip.

In addition, the handle body 210 is formed with a plurality of gripping protrusions 211 and an anti-slip protrusion 212 at the portion where the thumb is positioned to increase the gripping force and maintain rigidity of the handle.

The plurality of grip protrusions 211 are located between the user's fingers and allow the user to hold the handle 200 firmly by applying an even grip force when holding the handle 200.

In addition, the plurality of grip protrusions 211 are formed in a round shape following the shape of the handle body 210, which is round in the lateral direction, so that the handle body 210 is rigid in the lateral direction.

In addition, the anti-slip protrusion 212 improves the grip by preventing slipping in the area where the thumb is located when lifting the PET container 400 while holding the handle.

Additionally, as shown in the drawing, the anti-slip protrusions 212 are formed in a plurality of circular embossed shapes. The anti-slip protrusion 212 is not limited to a positive shape and may be formed only as a negative shape or may be shaped so that the positive and negative shapes intersect.

In addition, the anti-slip protrusion 212 is not limited to the above circular shape and can be formed in various shapes such as square, hexagon, octagon, etc. The shape of the anti-slip protrusion 212 may be a logo of a manufacturer that produces the PET container 400 or a manufacturing company that sells the contents of the PET container 400.

When the preform 100 is stretched and blown by a stretch rod and molded into the PET container 400, the outer peripheral surface of the PET container 400 is wrapped and bound to one side of the bottom of the handle body 210. A fixing piece 220 is formed.

The fixing piece 220 is formed in an 'ㅏ' shape so that the preform 100 is stretched and blown by a stretch rod to surround and bind the outer circumferential surface of the plastic container 400 to prevent it from being separated.

The process of constructing a preform having an integrated handle configured as described above will be described with reference to FIG. 3.

As shown in Figure 4, in order to mold the preform 100 of the present invention, the first mold part 310 and the second mold part 320 are closely coupled, and then the preform gate insert 323 on one side is connected to the second mold part 320. When the resin is introduced into the cavity 322 supported by the cavity base 321 and the resin is injected into the handle molding resin hole through the handle gate insert 325, the resin is injected into the preform molding resin hole 324 and the handle molding resin hole ( As 326 is filled, the upper preform molding resin hole 324 and the handle molding resin hole 326 are combined to form the handle 200 as one piece with the preform 100.

When molding the preform 100, the first mold part 310 and the second mold part 320 are combined, and the resin is injected into the preform molding resin hole 324 and the handle molding resin hole 326. The first mold part 310 slides to one side and is spaced apart from the second mold part 320.

After injecting resin into the preform molding resin hole 324 and the handle molding resin hole 326 so that the handle 200 is formed integrally with the preform 100, the first mold part 310 is replaced with the second mold part ( 320) When moved to one side, the first mold part 310 moves along the guide pin and is spaced apart from the second mold part 320.

After molding the preform 100, the first mold part 310 is spaced apart from the second mold part 320, the preform 100 with an integrated handle is attached to the preform core 316, and the handle mold is formed. It shows a state in which the handle 200 is inserted into the handle block of 330 and the first mold part 310 and the second mold part 320 are spaced apart.

After spacing the first mold part 310 to one side of the second mold part 320, in order to demold the preform 100 from the preform core 316, the eject plate 312 is attached to the preform core from the core fixing plate 311. (316) Push it to the side to separate it first.

At this time, the core fixing plate 311 and the fixing ring 315 are in place, and the eject plate 312, oil seal plate 313, neck ring plate 314, and neck ring 331 are inserted into the preform core 316. ), the slide block 332, the preform 100, and the handle mold 330 are combined and slide on the preform core 316 so that the core fixing plate 311 and the eject plate 312 are spaced apart at a predetermined distance. do.

When the eject plate 312 is initially spaced at a predetermined distance from the core fixing plate 311 of the first mold part 310 and the eject plate 312 is pushed a second time, the eject plate 312 At the same time as it is pushed, the neck ring plate 314 is guided by the slide connecting bars 317 installed on both sides, so that the neck ring plate 314 is opened in half, and the neck ring 331 and the slide block combined with the neck ring plate 314 (332), the handle block is split in half and demolded.

At this time, the neck ring 331, slide block 332, and handle block 333 are coupled to the neck ring plate 314 and are centered around the neck ring hole into which the preform core 316 of the neck ring 331 is inserted. When opened, the neck ring (331), slide block (332), and handle block (333), which are integrated into one piece, are connected to the neck ring plate (314) and the cam moves along the cam track to the tip of the preform core (316), thereby forming the neck ring plate. (314) gradually opens to demold the preform (100).

When the preform with the handle integrally formed as shown in FIG. 4 is molded, the PET container 400 can be formed as shown in FIG. 5.

Referring to FIG. 4, with the preform being molded as shown in FIG. 3 positioned inside the blower mold, a stretch rod is inserted into the inlet hole 111 of the preform 100 to stretch the preform while blowing it into the blower mold. The hollow molded product, that is, the PET container, is formed according to the formed shape.

Since the PET container manufactured as described above is manufactured by injection molding, the thickness distribution of the preform 100 can be precisely designed and molded, and the thickness of the PET container 400 is formed evenly, so it can be molded evenly when filled with contents. It can maintain its shape stably.

In addition, by wrapping and coupling the fixing piece 220 of the handle 200 by blow injection, the bottom of the handle 200 is firmly bound by the outer peripheral surface of the PET container 400, thereby allowing the contents of the PET container 400 to be held together. There is an advantage in that it is easy to stably control the tilt of the PET container 400 without the handle 200 being separated when pouring.

As described above, in the present invention, when the basic preform for molding the PET container 400 is injected, the handle 200 is formed integrally with the PET container 400, so the process of combining the handle 200 is omitted, thereby reducing the manufacturing process. There is an advantage in simplification.

In addition, the PET container 400 and the handle 200 are made of the same material, and the preform is stretched by a stretch rod to bind the fixing piece 220 during molding of the PET container, thereby improving durability.

In addition, when the preform 100 is injected to manufacture the PET container 400 with the integrated handle 200, the rigidity of the handle itself is improved by the shape, thickness, and bending angle of the handle.

The above description is merely an illustrative explanation of the technical idea of the present invention, and various modifications, changes, and substitutions can be made by those skilled in the art without departing from the essential characteristics of the present invention. will be. Accordingly, the embodiments disclosed in the present invention and the attached drawings are not intended to limit the technical idea of the present invention, but are for illustrative purposes, and the scope of the technical idea of the present invention is not limited by these embodiments and the attached drawings. The scope of protection of the present invention should be interpreted in accordance with the claims below, and all technical ideas within the equivalent scope should be construed as being included in the scope of rights of the present invention.

In the present invention, when injection molding a PET container with a blower, the handle is formed integrally with the PET container when injecting the basic preform for molding the PET container, so the process of combining the handle is omitted, thereby simplifying the manufacturing process, and the handle is By molding the preform of a PET container as an integrated piece, there is no need for separate work to combine the handle, and it is possible to manufacture a preform with an integrated handle that improves the sturdiness and durability of the handle.

Claims

A preform 100 whose overall shape is shaped like a '∪', with an inlet hole 111 formed inside so that a stretch rod can be inserted, and the entrance shape of the PET container is integrally formed;

When the preform 100 is stretched by a stretch rod, a handle 200 is formed integrally with the preform 100 by providing a fixing piece 220 so that the preform 100 is drawn into the inside of the PET container and molded;

A preform having an integrated handle, characterized in that it includes.
According to paragraph 1,

The handle 200 is,

A handle body 210 whose one side is integrally fixed to the preform 100;

A fixing piece 220 formed to protrude from the lower part of the handle body 210 to one side to be coupled to the outer peripheral surface of a PET container formed by stretching the preform 100 by a stretch rod;

A support 230 formed to protrude downward from the bottom of the handle body 210 and supported on the outer peripheral surface of the PET container;

A preform having an integrated handle, characterized in that it is formed including.
According to paragraph 2,

The handle body 210 is,

A preform with an integrated handle, characterized in that it is formed in a round shape to maintain lateral rigidity.
According to paragraph 2,

The handle body 210 is,

A plurality of gripping protrusions 211 to increase the gripping force and maintain rigidity of the handle;

A preform with an integrated handle, characterized in that anti-slip protrusions (212) are formed at the area where the thumb is located to prevent slipping and increase grip.
According to claim 1 or 2,

The fixing piece 220 is,

A preform with an integrated handle, characterized in that it is formed in an 'ㅏ' shape so that the outer peripheral surface of the PET container formed when the preform 100 is stretched by a stretch rod is wrapped and bound to fix the handle 200. .