CN111907875A - PET hot-filling container preformed blank with handle of integrated structure and preparation method and application thereof - Google Patents

Abstract

The invention discloses a preformed body of a PET hot-filling container with an integrated structure handle and a preparation method and application thereof. The preformed body comprises a bottle mouth, a neck, a bottle body and a handle. The bottle mouth and the bottle body They communicate with each other through a bottle neck, a positioning ring and a thread are arranged on the bottle neck, and the handle is connected with the bottle neck through a connecting piece. The preform in the present invention is prepared by using PET plastic, and can be used to prepare a PET hot-filling container with an integrated structure handle. The invention can effectively shorten the process flow, simplify the process, reduce the space occupation, improve the energy utilization rate, reduce the energy consumption, improve the molding efficiency, and reduce the operation cost, thereby reducing the cost of plastic containers, and is suitable for large-scale industrial production.

Description

PET hot filling container preform with integrated structure handle and preparation method thereof and application

technical field

The invention relates to the technical field of packaging, and more particularly, to a preformed body of a PET hot-filling container with a handle of an integrated structure, and a preparation method and application thereof.

Background technique

PET plastic has the characteristics of light weight, high transparency, impact resistance and not easy to break, and is widely used in daily necessities, daily chemical packaging and other fields. PET bottles have low environmental pollution and energy consumption, and are gradually replacing traditional packaging materials with the rising awareness of environmental protection. Become the packaging material with the most growth potential.

In order to facilitate the picking and placing of plastic containers, it is usually necessary to set a handle on the plastic container. Due to the poor plasticity of PET and PETG materials, they are extremely picky from mold processing to machinery and equipment. It is difficult to directly form a plastic container with a handle integrated with the bottle body based on ordinary processes. At present, a secondary set of artificially fitting the handle is usually used, or the handle is fixedly connected to the PET plastic by means of a rear or snap connection process. The process scheme on the container; the above-mentioned scheme package is not efficient, resulting in increased production and operating costs, and cannot meet the needs of large-scale industrial production. At the same time, the connection strength between the handle of the secondary set and the bottle body is relatively poor, and it is easy to cause the handle to fall off when subjected to external impact and large load; the handle is usually made of different materials from the plastic container, which makes recycling inconvenient.

The Chinese invention patent publication number CN1189121 discloses a container with an integral handle, a preform and a manufacturing method. First, a preform with a neck and an expansion part below the neck is made, and the neck is The part includes a positioning ring positioned above the inflatable portion, and a rigid handle made of oriented stretch thermoplastic material extending from the positioning ring and pressing integrally therewith; the preform is then blown Plastic operation, so that the expansion part of the expansion, so as to form the bottle body of the container.

The Chinese invention patent publication number CN1917997 discloses an integral handle PET container system, consisting of plastic material that can be oriented, and so that the resulting blow-molded container will include a hollow handle, and the preform includes: a molded structure , which has a neck and an extensible portion below the neck; and a hollow handle portion of orientable plastic material integrally connected to the preform at least at a first end, which, when formed into a container, constitutes a The handle, wherein the inner surface of the hollow handle portion and the inner surface of the extensible portion are formed as a continuum.

The Chinese invention patent publication number CN1636702 discloses a Pete bottle with an integrated handle and a manufacturing method thereof. The mold is used for injection molding, and the molten resin is injected into the primary mold with an injection molder, and the injection molding has a bottle mouth. In the pre-forming stage of the pre-product of the handle and the bottle body, after heating, it is moved to the secondary mold to stretch the bottle body and blow molding, and the end of the handle is surrounded by the bottle body during the blowing process. One-piece formed Pete bottle (PET bottle).

The Chinese invention patent publication number CN105480541 discloses a plastic container with a through hole and a production method thereof. The plastic container is made of PET or PETG material, and includes an outer wall of the container for wrapping the inner cavity of the container, and the through hole penetrates the opposite side of the outer wall of the container. On both sides, and the side walls of the through-hole block the inner cavity of the container and the inner cavity of the through-hole, the depth of the through-hole is less than or equal to 20mm, and then use welding equipment to weld the plastic container semi-finished product The outer wall distance is less than or equal to 20mm on the opposite sides. Part of the area is welded until the two are in contact to form a welding surface, and the welding surface is cut to form a through hole, and finally a plastic container is formed.

The above four solutions can directly form a plastic container with a handle integrated with the bottle body through PET material, but there are still the following deficiencies in the molding process:

(1). In the pre-formed body, the structure of the integrated structure handle is relatively complex, which makes the production of the blank forming mold complex and the cost is high, which also causes the complex process in the blank forming process, resulting in the cost of the overall pre-formed blank. higher;

(2). The two-step molding process adopted is to first mass-produce the pre-formed body through the injection molding process, cool it and store it in stock, and then use the blow molding equipment to heat, blow, and demold the pre-formed body when necessary. , cooling and other processes to form the final plastic container, the product production process is long, the process is complex, the site occupies a large space, and the operating cost increases, resulting in a high cost of plastic containers;

(3). In the two-step molding process, the preform needs to be cooled before being stored in storage, which occupies a large area. During the blow molding process, the preform needs to be preheated, which consumes a lot of energy and has a low energy utilization rate. ;

(4) During the blow molding process, the end of the handle needs to be surrounded by the bottle body and fused with the bottle body, which increases the complexity of the plastic container molding process and makes the production efficiency low.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a PET hot-filling container preform with an integrated structure handle in view of the deficiencies in the prior art, which has a simple structure, simplifies the manufacturing process of the forming mold, and reduces the cost of the overall preform. .

Another object of the present invention is to provide a method for preparing the above-mentioned PET hot-filling container preform with an integrated structure handle.

Another object of the present invention is to provide an application of the above-mentioned PET hot-filling container preform with an integrated handle in the preparation of a PET hot-filling container with an integrated handle.

The object of the present invention is achieved through the following technical solutions:

A PET hot-filling container preformed body with an integral structure handle, comprising a bottle mouth, a bottle neck, a bottle body and a handle, the bottle mouth and the bottle body are communicated through the bottle neck, and the bottle neck is provided with a positioning Ring and thread, the handle is connected with the bottle neck through a connecting piece.

Further, the handle is a strip-like body or a closed ring-like body.

Further, there are two handles, and the two handles are embedded with each other to form an integral strip-like body or a closed ring-like body.

Further, the two handles are respectively arranged on both sides of the bottle neck, and the connecting line between the handles passes through the axis of the bottle neck.

Further, the two handles are respectively provided with inter-embedded convex bodies and inter-embedded concave bodies.

Further, a reinforcing device is provided below the junction of the positioning ring and the connecting piece, and the reinforcing device is in the shape of an oblique triangle.

A preparation method of the above-mentioned PET hot-filling container preform with integrated structure handle, characterized in that it comprises the following steps:

S1. Design and manufacture a PET hot-filling container preform molding die with an integrated structure handle;

S2. Inject molten PET resin into the molding die to form a preform with a bottle mouth, a neck, a bottle body and an integrated structure handle;

S3. Cooling and demoulding to obtain a PET hot-filling container preform with an integrated structure handle.

Further, the molding die described in step S1 includes an upper die set, a lower die set and a main mandrel, the upper die set defines the shape of the bottle mouth, the neck of the bottle, the connecting piece and the handle, and the lower die set defines the bottle. The shape of the body, the main mandrel is located in the cavity of the molding mold.

Further, the bottom of the molding die is provided with an injection runner for injecting molten resin.

Further, the injection runner includes a first injection runner and a second injection runner, the first injection runner is connected to the cavity of the molding mold, and the second injection runner is connected to the mold cavity in the upper mold set. Handle cavity connection.

In the present invention, the molten PET resin enters the mold from the first injection runner to form the bottle body, the bottle mouth and the positioning ring, and at the same time, the molten PET resin enters the handle cavity from the second injection runner to form the handle , and is connected with the positioning ring as a whole through the connecting piece die cavity, and finally a preform with an integrated structure handle is formed, which speeds up the molding efficiency.

An application of the above-mentioned PET hot-filling container preform with an integral structure handle in preparing a PET hot-filling container with an integral structure handle, the application comprising the following steps:

Y1. Prepare a PET hot-filling container forming mold with an integrated structure handle;

Y2. Heating and temperature-adjusting the preformed body of the PET hot-filling container with an integrated structure handle;

Y3,. Use a hot-filling container forming mold to blow-mold the preform to form the desired shape of the hot-filling container, cool and demould, and obtain a PET hot-filling container with an integral structure handle.

Compared with the prior art, the beneficial effects of the present invention are as follows:

The invention adopts a one-step molding process, shortens the process flow, simplifies the process, and reduces space occupation at the same time, and the embryo body that has just been demolded enters the heating and temperature adjustment process when the temperature is high, effectively utilizes the waste heat of the embryo body, and improves energy utilization. , reduce energy consumption, reduce operating costs, and thus reduce the cost of plastic containers.

In the process of blow molding, the handle in the present invention no longer needs to be integrated with the bottle body, which shortens the operation time, improves the molding efficiency, and is suitable for large-scale industrial production.

Description of drawings

1 is a schematic structural diagram of a PET hot-filling container preform with an integrated structure handle in Example 1;

Fig. 2 is the partial schematic diagram of the PET hot-filling container preform with integrated structure handle in Example 1;

3 is a partial schematic view of a PET hot-filling container preform with a reinforcing device in Example 2;

4 is a partial schematic view of a PET hot-filling container preform with an integrated structure handle in Example 3;

5 is a partial schematic view of a PET hot-filling container preform with an integrated structure handle in Example 4;

6 is a schematic structural diagram of a PET hot-filling container preform with an integrated structure handle in Example 5;

7 is a partial schematic view of a PET hot-filling container preform with an integrated structure handle in Example 6;

Fig. 8 is the use state diagram of the hot-filling container prepared from the PET hot-filling container preform with integrated structure handle in Example 6;

9 is a schematic structural diagram of a PET hot-filling container preform molding die with an integrated structure handle in Example 7;

FIG. 10 is a schematic structural diagram of a PET hot-filling container with an integrated structure handle in Example 9. FIG.

Among them, 1 is the bottle mouth, 2 is the bottle body, 3 is the handle, 31 is the connecting piece, 311 is the reinforcing structure, 32 is the mutual inlay, 321 is the mutual inlaid convex body, 322 is the mutual inlaid concave body, and 4 is the bottle neck , 41 is the positioning ring, 42 is the thread, 5 is the upper die set, 6 is the lower die set, and 7 is the main shaft.

Detailed ways

The accompanying drawings are for illustrative purposes only, and should not be construed as limiting the present invention; in order to better illustrate the present embodiment, some parts of the accompanying drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art It is understandable to the artisan that certain well-known structures and descriptions thereof may be omitted from the drawings. The positional relationships described in the drawings are only for exemplary illustration, and should not be construed as limiting the present invention.

Example 1

As shown in Figures 1 to 3, this embodiment provides a PET hot-filling container preform with an integrated handle handle, including a bottle mouth, a neck, a bottle body and a handle, and the bottle body 2 is substantially cylindrical and can be extended The main body part can form a container during orientation treatment; the bottle mouth 1 and the bottle body 2 are communicated through the neck 4, and the bottle neck 4 is provided with a positioning ring 41 and a thread 42; the handle 3 is arranged on the bottle neck 4 part, through The connecting piece 31 is connected with the bottle neck 4 and is integrally connected with the preform.

In this embodiment, the handle is a strip-like body. In order to maintain the appearance of the handle 3 when picking up the contents contained in the container, the thickness of the handle 3 is relatively thick, so that the handle 3 becomes a hard handle, and The thickness of the connecting piece 31 used to connect the bottle neck 4 and the handle 3 is relatively thin, so that the connecting piece 31 becomes a soft low-elasticity flexible piece. The appearance of the connecting piece 31 can be well changed when the object is lifted, and it will bend to a certain extent when the object is lifted without brittle fracture.

Example 2

As shown in FIG. 3 , referring to Embodiment 1, this embodiment provides a PET hot-filling container preform with an integrated structure handle. The difference from Embodiment 1 is that in this embodiment, the positioning ring 41 and the A reinforcing device 311 is provided below the connecting portion of the connecting piece 31 , and the reinforcing device 311 is in the shape of an oblique triangular body, and the handle 3 can bear a larger pulling force.

Example 3

As shown in FIG. 4 , this embodiment refers to Embodiment 1, and provides a PET hot-filling container preform with an integral structure handle. The difference from Embodiment 1 is that the handle in this embodiment is a triangle. Closed toroid.

Example 4

As shown in FIG. 5 , referring to Example 1, this embodiment provides a preformed body of a PET hot-filling container with a handle of an integrated structure. The difference from Embodiment 1 is that the handle in this embodiment is an ellipse. A closed ring-shaped body.

Example 5

As shown in FIG. 6 , this embodiment refers to Embodiment 1, and provides a PET hot-filling container preform with an integrated structure handle. The difference from Embodiment 1 is that in this embodiment, the preform is The positioning ring 41 is provided with two handles 3 of the same structure, and the two handles 3 are arranged on both sides of the bottle neck 4 , and the connecting line between the two handles 3 passes through the axis of the bottle neck.

In this embodiment, two handles 3 of the same structure are provided, which increases the load-bearing capacity of the handles, especially the connecting piece 31 for connecting the bottle neck 41 and the handle 3, and is suitable for use on large-capacity containers.

Example 6

As shown in FIGS. 7 and 8 , this embodiment refers to Embodiment 5, and provides a PET hot-filling container preform with an integrated structure handle. The difference from Embodiment 5 is that two The handle 3 is respectively provided with an inter-fitting convex body 321 and an inter-fitting concave body 322 . After the preform is processed into a hot-filling container, when in use, the two handles 3 can be pulled up and put together relative to each other, so that the inter-embedded convex body 321 and the inter-embedded concave body 322 are fitted together to form an inter-embedded body. 32 in order to pick up heavier contents.

Example 7

As shown in FIG. 9 , the present embodiment provides a PET hot-filling container preform molding mold with an integral structure handle, forming a PET preform including a bottle mouth 1 , a bottle body 2 , a handle 3 and a neck 4 . The blank, wherein the molding die is composed of an upper die set 5, a lower die set 6 and a main mandrel 7.

In this embodiment, the upper die set 5 is used to define the shape of the bottle mouth, the neck of the bottle, the connecting piece and the handle, and is provided with a corresponding die cavity; the lower die set 6 is used to define the shape of the bottle body, and is provided with a bottle body die cavity; The main mandrel 7 is located in the cavity of the moulding mould. The bottom of the molding mold is provided with a first injection runner and a second injection runner for injecting molten resin; wherein, the first injection runner is connected to the cavity of the molding mold, and the second injection runner is connected to the upper mold set. The handle cavity connection.

Example 8

This embodiment provides a method for preparing a PET hot-filling container preform with an integrated structure handle, which is completed at the preform forming station of the injection-stretch-blow integrated equipment, and specifically includes the following steps:

S1. Design and manufacture the PET hot-filling container preform molding die with integrated structure handle in Example 6;

S2. inject molten PET resin into the molding die through the first injection runner and the second injection runner to form a preform with a bottle mouth, a neck, a bottle body and an integrated structure handle;

S3. Cooling and demoulding to obtain a PET hot-filling container preform with an integrated structure handle.

Example 9

As shown in FIG. 10 , this embodiment provides a PET hot-filling container with an integrated structure handle, which is completed on an integrated injection-pull-blowing equipment. The preparation method of the hot-filling container specifically includes the following steps:

Y1. prepare a PET hot-filling container forming mold with an integrated structure handle, and this process is synchronized with step S1 of embodiment 7;

Y2. The PET hot-filling container preform with integrated structure handle prepared in Example 7 is transferred to the second station through the disc transfer device on the injection-stretch-blow integrated equipment, and the temperature has not yet dropped to room temperature. The preform of the structure handle is heated and temperature adjusted;

Y3,. Move the preform of the integrated structure handle after heating and temperature adjustment to the third station, and use the hot-filling container forming mold to blow-mold the preform to form the desired shape of the hot-filling container, After cooling and demoulding, a PET hot-filling container with an integrated structure handle is obtained.

Obviously, the above-mentioned embodiments are only examples for clearly illustrating the technical solutions of the present invention, but are not intended to limit the embodiments of the present invention. For those of ordinary skill in the art, changes or modifications in other different forms can also be made on the basis of the above description. There is no need and cannot be exhaustive of all implementations here. Any modifications, equivalent replacements and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the claims of the present invention.

Claims (10)

1. a PET hot-filling container preform with integrated structure handle, is characterized in that, comprises bottle mouth, neck of bottle, bottle body and handle, between described bottle mouth and bottle body is communicated through bottle neck, so The bottle neck is provided with a positioning ring and a thread, and the handle is connected with the bottle neck through a connecting piece. 2 . The PET hot-filling container preform with integrated handle according to claim 1 , wherein the handle is a strip-like body or a closed ring-like body. 3 . 3 . The PET hot-filling container preform with integrated structure handle according to claim 1 , wherein the number of the handles is two, and the two handles are embedded in each other to form an integral strip-like shape. 4 . body or closed toroid. 4. The PET hot-filling container preform with integrated structure handle according to claim 3, wherein the two handles are respectively arranged on both sides of the bottle neck, and the two handles are arranged between the handles. The connecting line passes through the axis of the bottle neck. 5 . The PET hot-filling container preform with integrated handle according to claim 3 , wherein the two handles are respectively provided with inter-embedded convex bodies and inter-embedded concave bodies. 6 . 6. A method for preparing a preformed body of a PET hot-filling container with an integrated structure handle according to any one of claims 1 to 5, characterized in that, comprising the following steps: S1. Design and manufacture a PET hot-filling container preform molding die with an integrated structure handle; S2. Inject molten PET resin into the molding die to form a preform with a bottle mouth, a neck, a bottle body and an integrated structure handle; S3. Cooling and demoulding to obtain a PET hot-filling container preform with an integrated structure handle. 7. The preparation method according to claim 6, wherein the molding die described in step S1 comprises an upper die set, a lower die set and a main mandrel, and the upper die set defines a bottle mouth, a bottle neck, a connecting piece and the shape of the handle, the lower die set defines the shape of the bottle body, and the main mandrel is located in the cavity of the molding die. 8 . The preparation method according to claim 6 , wherein an injection runner for injecting molten resin is provided at the bottom of the molding die. 9 . 9 . The preparation method according to claim 8 , wherein the injection runner comprises a first injection runner and a second injection runner, and the first injection runner is connected to the cavity of the molding mold, 10 . The second injection runner is connected with the handle mold cavity in the upper mold group. 10 . An application of the PET hot-filling container preform with an integrated structure handle according to any one of claims 1 to 5 in preparing a PET hot-filling container with an integrated structure handle, the application includes the following step: Y1. Prepare a PET hot-filling container forming mold with an integrated structure handle; Y2. Heating and temperature-adjusting the preformed body of the PET hot-filling container with an integrated structure handle; Y3,. Use a hot-filling container forming mold to blow-mold the preform to form the desired shape of the hot-filling container, cool and demould, and obtain a PET hot-filling container with an integral structure handle.

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