KR100851988B1 - Blow molded polyethylene terephthalate container including handgrip - Google Patents

Abstract

Disclosed is a polyethylene terephthalate container with an integral handle. The disclosed polyethylene terephthalate container with a handle includes: putting a preform with a handle into a blow molding mold and installing a balloon member inside the handle, injecting gas into the inside of the preform, and A body portion having a receiving space manufactured by blow molding for injecting a fluid to expand the handle of the preform as well when inflating the preform, and a hollow communicating with the receiving space of the body portion It is characterized by including a handle portion provided.

Handle part, body part, balloon member, polyethylene terephthalate resin

Description

Polyethylene terephthalate container with integral handle {BLOW MOLDED POLYETHYLENE TEREPHTHALATE CONTAINER INCLUDING HANDGRIP}

1 is a partial cutaway cross-sectional view of one side of a preform of a material of a polyethylene terephthalate container with an integral handle according to an embodiment of the present invention.

Figure 2 is a partial cutaway cross-sectional view of one side of the polyethylene terephthalate container with an integral handle according to an embodiment of the present invention.

3 is a view showing that the handle portion shown in Figure 2 is further formed in the body portion.

FIG. 4 is a side cross-sectional view of a blow molding mold and an abundance member for forming the polyethylene terephthalate container with the integral handle shown in FIG. 2.

FIG. 5 is a side cross-sectional view illustrating a state in which a preform is inserted into the blow molding die illustrated in FIG. 4.

FIG. 6 is a view illustrating a state in which a gas is supplied to the preform shown in FIG. 5 and a fluid is supplied to the balloon member.

FIG. 7 is a view illustrating that the preformed product and the balloon member illustrated in FIG. 6 are expanded to form a polyethylene terephthalate container having an integral handle inside the blow molding mold.

<Description of Symbols for Main Parts of Drawings>

10: preform 12: handle hole

15: handle 16: storage space

17: hollow 14: body

16: accommodation space 18: floor

100: finished product 112: handle hole

114: body portion 115: handle portion

116: receiving space 117: hollow

118: bottom 500: mold for blow molding

505: body shape space 507: handle shape space

510: balloon member 515: oil

520: injection tube 525: hot body

The present invention relates to a polyethylene terephthalate container, and more particularly, to molding a polyethylene terephthalate container by blow molding using a polyethylene terephthalate (PET) resin as a material, by means of a blow molding mold having a balloon member. A polyethylene terephthalate container with an integral handle formed.

In general, the plastic container is manufactured by injection molding to produce a mold having a desired shape and inject a plastic melt between the molds, or by manufacturing a preform as described in the present invention and then blow molding the final finished plastic container (hereinafter, a finished product). ).

In the case of injection molding, the handle of the container may be automatically formed. At this time, the outer surface of the container is not beautiful because the plastic melt penetrates into the gap of the mold paired to form the container and the handle. Can not do it.

In the case of polyethylene terephthalate (PET) resin, it is impossible to manufacture a handle by injection molding, and thus a plastic container without a handle is manufactured.

In this case, as shown in Japanese Patent 6-298252, 6-297553, Korean Patent 1992-7002649, US Patent 4,727,997, the handle is separately attached to the plastic container, or in Korean Patent 1998-026975, Japanese Patent 7-300122, 10-146880 As described above, the shape of the container was modified to prepare a container of a relatively large capacity.

However, these patents are not practically used because there are many commercial problems, such as lack of reliability due to rising manufacturing prices or complexity of the process.

In particular, when attaching the handle separately, the handle and the container are independent of each other, so that the capacity of the fluid inside the container cannot be observed, and the handle is not hollow so that air flows when the internal fluid is poured. This makes the flow of fluid unnatural.

As such, the molding apparatus including a mold for manufacturing a conventional plastic container not only has a problem that the appearance of the mold is left on the outer surface and the handle of the container, and the appearance is not beautiful, but also due to the trace of the mold, The PET integrated handle bottle was not manufactured because of the easily broken disadvantage.

In addition, the handle is made separately and can be attached to the outer surface of the container, the attachment portion remains after the attachment of the handle is not beautiful in appearance, and the handle is separate from the container, it is impossible to observe the contents inside the container, The outflow of the fluid was not natural due to the inflow of air.

In particular, the plastic part of the handle portion is made different from the material of the PET bottle, there is a disadvantage that must be separated during the recycling of the PET bottle with a handle.

In addition, the conventional blow molding mold does not have a separate device for molding the handle and difficulty in forming the integral handle portion in a plastic container using a PET material having a relatively high strength and rigidity among plastics. Therefore, there is a need for improvement.

The present invention has been created by the necessity as described above, because the handle portion provided with a hollow in a plastic container made of a PET material having a relatively high rigidity and strength, among the plastic material is not integrally molded, the fluid is the receiving space of the body portion If the material is filled in the hollow of the handle portion communicated with the receiving space, the remaining capacity of the fluid in the container can not be confirmed, and the large capacity PET bottle must be held with both hands and the receiving space It is an object of the present invention to provide a polyethylene terephthalate container equipped with a hollow one-piece handle in order to solve the problem that the fluid can not easily flow to the outside.

Polyethylene terephthalate container with a one-piece handle according to the present invention: after the injection-molded preform into the blow molding mold and installing the balloon member on the inside of the handle, injecting gas into the interior of the preform And a body part having a receiving space manufactured by blow molding to inject a fluid into the balloon member to expand the handle of the preform when the preform is inflated, and to communicate with the receiving space of the body part. It comprises a handle portion having a hollow.

Preferably, the handle portion is characterized in that each provided on both sides of the body portion.

And, the material of the body portion and the handle portion is characterized in that the polyethylene terephthalate (PET) resin.

Hereinafter, with reference to the accompanying drawings will be described a preferred embodiment of a polyethylene terephthalate container having an integral handle according to the present invention. In this process, the thickness of the lines or the size of the components shown in the drawings may be exaggerated for clarity and convenience of description. In addition, terms to be described below are terms defined in consideration of functions in the present invention, which may vary according to the intention or convention of a user or an operator. Therefore, definitions of these terms should be made based on the contents throughout the specification.

1 is a partial cutaway cross-sectional view of one side of a preformed product that is a material of a polyethylene terephthalate container with an integral handle according to a preferred embodiment of the present invention, Figure 2 is an integral type according to a preferred embodiment of the present invention A partial cutaway cross-sectional view of one side of the polyethylene terephthalate container with a handle, Figure 3 is a view showing that the handle portion shown in Figure 2 is further formed in the body portion, Figure 4 is the integral handle shown in Figure 2 Is a side cross-sectional view showing a blow molding mold and an abundance member for molding a polyethylene terephthalate container equipped with, and FIG. 5 is a side cross-sectional view showing a state in which a preform is inserted into the blow molding mold shown in FIG. 6 is a view illustrating a state in which gas is supplied to the preform shown in FIG. 5 and fluid is supplied to the balloon member. FIG. 7 is a view showing that the polyethylene terephthalate container having an integral handle inside the blow molding die is molded by expanding the preformed product and the balloon member illustrated in FIG. 6.

As shown in FIG. 1, the preform 10 has a body portion 14 and a handle 15 integrally formed therein, and the body portion 14 has a cylindrical shape and has an accommodation space 16 therein. It forms and the bottom surface 18 is blocked.

In addition, the handle 15 is formed integrally on one side of the body portion 14 to form a hollow 17 therein, the receiving space 16 and the hollow of the handle 15 of the body portion 14 17 are in communication with each other.

The method for manufacturing the preform 10 is disclosed in Korean Patent Application No. 2004-35554 by the present applicant.

1 and 2, the preform 10 has a diameter smaller than that of the finished product 100, which is a polyethylene terephthalate container with a handle, and has a simple cylindrical shape. By doing so, the finished product 100 in a predetermined shape is manufactured.

The body portion 14 of the preform 10 is expanded to become the body portion 114 of the finished product 100, and the handle 15 of the preform 10 is also expanded and shaped to handle the finished product 100. The unit 115 becomes.

The preformed product 10 and the finished product 100 may be formed of various materials for molding a plastic container, but in one embodiment of the present invention, polyethylene terephthalate (PET) resin is used.

The polyethylene terephthalate has an excellent function as a fiber, a film, a beverage container, and recently, demand for electric beverages such as conductive films and containers for soft drinks is rapidly increasing.

The polyethylene terephthalate is excellent in transparency compared to other plastic containers made of polyethylene, polypropylene, or the like, and because the gas permeability is very low, the gas attached to the beverage is preserved as it is. In addition, the strength and stiffness of the polyethylene terephthalate is the largest among ordinary plastics, and the heat deformation temperature is about 240 ° C and has excellent heat resistance.

As shown in Figure 2, the finished product 100 is a polyethylene terephthalate container with an integral handle is formed with a bottom surface 118 under the body portion 114, the inside of the body portion 114, such as a solution There is provided a receiving space 116 to be stored.

The handle portion 115 fixed to one side of the body portion 114 has a hollow 117 communicating with the accommodation space 116 is formed inside, between the handle portion 115 and the body portion 114. The handle through hole 112 is formed.

As shown in FIG. 3, the handle part 115 may be installed at both sides of the body part 114, and three or more handle parts may be formed as necessary.

As shown in FIG. 4, the finished product 100 is molded inside the blow molding mold 500, and a space corresponding to the exterior shape of the finished product 100 is formed inside the blow molding mold 500. It is.

The internal space of the blow molding mold 500 is largely divided into a body shape space 505 and a handle shape space 507, and the handle shape space 507 is a handle 115 and a handle through-hole of the finished product 100. A space corresponding to 112 is provided with a balloon member 510 at a position corresponding to the handle hole 115.

The balloon member 510 is connected to a fluid supply means (not shown) made of a fluid supply tank, a pressure pump, and the like, and when the fluid is supplied to the inside of the balloon member 510 during blow processing, the balloon member ( 510 is inflated, and thus the handle through-hole 12 in contact with the balloon member 510 is also inflated and stretched.

The fluid supplied to the inside of the balloon member 510 is preferably using an oil having no change in physical properties even at a high temperature, and the material of the balloon member 510 is a blow process without a chemical change caused by oil. It is preferable to use a silicon material that can withstand temperature and pressure.

As shown in FIG. 5, the mold is closed by inserting the balloon member 510 into the handle through-hole 14 formed in the handle 15 of the preform 10.

And, as shown in Figure 6, when the hot air is injected into the receiving space of the body portion 14, oil is injected into the inside of the balloon member 510.

The balloon member 510 is gradually expanded by the pressure of the oil to reach the inner surface of the handle through-hole 12 to continuously expand to extend the handle through-hole 12.

Therefore, the handle 15 is expanded by the balloon member 510, the shape is matched to the handle shape space 507 of the blow molding mold 500, and is formed in the shape of the handle portion 115 of the finished product 100.

As a result, the present invention is dualized into the body portion 14 and the handle 15 so that the body portion 14 is inflated by injecting a hot body 525 like a general blower, and the handle 15 to the balloon member 510. The handle 15 is integrally formed with the body portion 14 by injecting and expanding the oil 525.

The balloon member 510 is injected with a heated fluid rather than a gas. As shown in FIG. 5, when the preform 10 is seated on the mold 500 of the blow molding apparatus according to the present invention, the balloon member 510 is positioned at the handle hole 12 of the preform foam 10. do.

The mold is paired with the upper mold and the lower mold to seal the preform 10. Next, after closing and closing the mold as shown in FIG. 6, the injection tube 520 is inserted into the accommodating space 16 of the preliminary drug body 14 to inject the hot body 525, and the handle (15) The heated fluid 515 is injected into the balloon member 510 located in the handle hole 12.

When the hot body 525 and the fluid 515 are injected, the body 14 and the handle 15 of the preform 10 gradually expand due to the pressure of the gas and the fluid, so that the wall surface of the product is blow-molded 500 Blow molding is completed by contacting the inner surface of

The blow process is carried out at specific temperature and pressure conditions according to the properties of the material, the temperature of the heating element and fluid injected when produced from PET material is about 88 ~ 116 ℃, the pressure of the heating element is 5.2 ~ 6.9 bar It is preferable to be between.

This is because the PET material has fluidity in the temperature range, and the expansion of the material can be performed smoothly in the pressure range. These ranges of temperature and pressure depend on the material and properties of the preform.

As shown in FIG. 7, when the preform 10 is blown into the shape of the finished product 100, the blowing process discharges hot air and oil, and after cooling, removes the finished product 100 from the mold 500. Production of the polyethylene terephthalate container with integral handle is complete.

As described above, the blow method for forming a polyethylene terephthalate container with an integral handle seats the preform 10 in a blow molding mold (500 in FIG. 4) having a space for forming a finished product, and then the preform 10 The hot body is injected into the inside of the c), and the preform 10 is heated and expanded to be processed into a form provided in the blow molding mold 500.

The preform 10 is made of a plastic material and requires a constant temperature and pressure to expand it. To this end, the heated gas is injected, and the blow molding mold 500 also includes heating means (not shown) such as a heating wire to increase the temperature.

Then, after the preform 10 is heated and expanded to be processed in the form of the finished product 100, it is cooled again to harden the shape of the finished product 100. To this end, cooling means such as a cooling water passage for lowering the temperature of the blow molding die 500 is provided.

As described above, since the heating means and the cooling means for heating or cooling the blow molding mold 500 are well known in the technical field of blow molding, illustration and detailed description thereof will be omitted.

Polyethylene terephthalate container with an integral handle according to an embodiment of the present invention having the above configuration is excellent in texture and appearance because the container and the handle made of polyethylene terephthalate are formed integrally and the outer surface is smoothly formed unlike the conventional invention. A container is formed, and even a large capacity container is easy to handle with one hand, and a passage is formed in the handle to contain the material in the container so that the material is filled in the passage of the handle to check the remaining capacity of the material. Due to the air in it, it is possible to achieve the effect of spontaneous pouring when the material in the container spills.

Although the present invention has been described with reference to the embodiments shown in the drawings, this is merely exemplary, and those skilled in the art to which the art belongs can make various modifications and other equivalent embodiments therefrom. Will understand.

Therefore, the true technical protection scope of the present invention will be defined by the claims below.

As described above, the polyethylene terephthalate container with an integral handle according to the present invention is a container excellent in texture and appearance because the container and the handle made of polyethylene terephthalate are formed integrally and the outer surface is smoothly formed unlike the conventional invention. Is formed, and the passage is formed in the handle to put the material in the container, the material is filled in the passage of the handle to check the remaining capacity of the material, and the air in the handle is poured naturally when the material in the container is leaked The effect can be achieved.

Claims (3)

After inserting the preform having a handle into a blow molding mold and installing a balloon member inside the handle, a gas is injected into the preform and a fluid is injected into the balloon member, thereby A body part having a receiving space manufactured by blow molding to expand the handle of the preform as well at the time of expansion, and a handle part having a hollow communicating with the receiving space of the body part, The material of the body portion and the handle portion is a polyethylene terephthalate container with an integral handle, characterized in that the polyethylene terephthalate (PET) resin. The method of claim 1, Polyethylene terephthalate container with a one-piece handle, characterized in that the handle portion is provided on each side of the body portion. delete

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