KR200450384Y1 - Container having wall portions with different pressure resistance - Google Patents

Abstract

The container having a wall portion with different pressure resistance of the present invention includes a chamber having a predetermined volume for receiving a large amount of fluid and a mouth positioned at the top of the chamber and in which the fluid dispenser head is assembled and sealed. do. The chamber is a super-thin compressible wall of a predetermined thickness forming the body of the container and at least two pressure resistant, non-deformable rigid support ribs positioned at a predetermined position on the compressive wall and thicker than the compressible wall. (pressure-resistible non-deformable stiff supporting ribs). Each time the fluid dispenser head is depressed, a pressure differential occurs in the container, thereby compressing the compressive wall to eject the contained fluid through the fluid dispenser head. If the constricted compressive wall eventually becomes completely flat, residual fluid in the vessel can be drained, thereby avoiding unnecessary fluid waste.

Pressure Resistant, Fluid, Chamber, Fluid Dispenser Head, Spout, Compressible Wall, Rigid Support Rib

Description

CONTAINER HAVING WALL PORTIONS WITH DIFFERENT PRESSURE RESISTANCE}

The present invention relates to a container, in which the super-shin compressible wall of the container is placed between the stiff supporting ribs, especially when the dispenser assembled in the mouth of the container is pressed. It relates to a container having walls with different pressure resistances, such that the pressure difference causes the fluid in the container to squeeze out and eject through the dispenser.

Generally, push type fluid containers have a molded body in which the fluid dispenser head is assembled to the spout of the body. The fluid dispenser head has a dip tube extending downward from the head to the bottom of the container body, leading the contained fluid under pressure to the fluid dispenser head. A disadvantage of conventional push-type fluid containers is that when the level of residual fluid is lower than the bottom of the dip tube, the residual fluid cannot be ejected through the dip tube, resulting in unnecessary fluid waste.

Another type of fluid container is provided with a follow-up piston therein. When the fluid dispenser head assembled at the top of the vessel is depressed to release air and a pressure change occurs in the vessel, the follow-up piston moves upwards and the fluid in the vessel is ejected. Since a container with a follow-up piston includes a large number of parts and requires an increase in material, labor and manufacturing time, the production cost of the container will eventually increase.

The two conventional containers described above have common drawbacks. That is, even if the contained fluid is consumed, the container still occupies a large space, harming the environment.

1A-1D illustrate the manner of forming a conventional push type container by a hollow-forming process. As can be seen from FIG. 1A, two mold halves 20 having a particular shape are used to mold the container. Each of the mold halves 20 has a spout cavity 21 and a body cavity 22 having a specific volume. A long strip of bag-shaped hollow raw material 10 longer than the mold half 20 is positioned between two mold halves 20 and the bag-shaped raw material 10 The upper and lower portions of the protrude from two opposite ends of the mold half 20. See also FIGS. 1B and 1C. When the two mold halves 20 are pressed and joined together, the bag-shaped raw material 10 is stably centered between the two mold halves 20. The lower part of the raw material 10 is compressed by the bonded mold half 20 and completely flattened. A blower (not shown) is fitted to the upper open end of the bag-shaped raw material 10, and a high pressure gas is fed into the raw material 10 by the blower, so that the raw material 10 is expanded under pressure so that the mold half ( A container having a shape formed by 20) is formed. Subsequently, as shown in FIG. 1D, the useless raw material 10 at the top of the molded container 30 and the flattened raw material at the bottom of the molded container are cut out and the container 30 with the flexible wall is cut out. Is completed.

Generally, the fluid dispenser head is assembled to the container 30. The fluid dispenser head basically includes a spray head that projects from the open top of the container 30 and is exposed to air. The spray head is connected to the actuator rod and moves together. When the user applies downward force to or releases the downward force from the spray head, the actuator rod reciprocates vertically. Due to the vertical displacement of the spray head and the actuator rod, there is a pressure difference in the vessel, and the fluid contained in the vessel is ejected through the spray head. The container described above is mass produced by the blow molding method and has a wall thickness of about 0.8 mm to 1 mm. According to this thickness, the wall of the vessel subjected to the pressure difference as described above is not compressed enough to contract and discharge the remaining fluid in the container, especially when only a small amount of residual fluid remains. On the other hand, due to the rather thick wall thickness, the container is prone to irregular deformation even when compressed, which prevents a small amount of residual fluid from being completely discharged from the container, forming unnecessary fluid waste.

The main purpose of the present invention is that if the ultra-thin compressible wall of the container can shrink between the rigid support ribs due to the influence of the pressure difference, and the ultra-thin compressible wall eventually becomes completely flat due to several shrinkages, the remaining fluid in the container is discharged. It is to provide a container having walls with different pressure resistances, so that unnecessary waste can be avoided.

In order to achieve the above and other objects, the container having a wall portion having different pressure resistance according to the present invention is a fluid receiving chamber having a predetermined volume for receiving a large amount of fluid and a fluid receiving chamber located above the fluid receiving chamber. The dispenser head includes a spout in which the dispenser head is assembled and sealed. The fluid receiving chamber is provided with a super-thin compressible wall of predetermined thickness forming a body of the container and at least two pressure resistant non-deformable rigid supports positioned at predetermined locations on the compressive wall and thicker than the compressive wall. It has ribs (pressure-resistible non-deformable stiff supporting ribs). Each time the fluid dispenser head is depressed, a pressure differential occurs in the container, thereby compressing the compressive wall between the rigid support ribs and ejecting the received fluid through the fluid dispenser head. If the compressive wall eventually becomes completely flat due to several ejections and contractions, residual fluid in the vessel may be drained, thereby avoiding unnecessary fluid waste.

In a preferred embodiment of the present invention, the compressible wall has a wall thickness of 0.13 mm to 0.2 mm and the support ribs have a thickness of 0.5 mm to 1 mm.

In a preferred embodiment, the support ribs have a geometric cross section formed according to the use of the container.

In a preferred embodiment, the fluid receiving chamber is integrally formed using two mold halves by an injection stretched blow molding process, and the support ribs groove in the parting lines of the two mold halves. By providing.

In the most preferred embodiment, the support ribs are formed by providing two corresponding grooves on two opposite sides of the seam of the two mold halves.

In the present invention, the container may be a bottle, cup or bag.

The structure and technical means adopted by the present invention in order to achieve the above and other objects can be best understood by referring to the following detailed description of the preferred embodiments and the accompanying drawings.

The present invention relates to a container having wall portions of different pressure resistances. Reference is now made to FIGS. 2A-2D, which illustrate an feasible manner for shaping a container of the present invention by injection stretch blow molding.

As shown in FIG. 2A, the blank 40 is made from the raw material blank by injection molding and has two mold halves forming the spout cavity 61 and the body cavity 62. 60) is used to mold the container of the present invention. The groove 63 is provided with a space inside the body cavity 62. In the feasible shaping scheme shown, the grooves 63 are located on two opposite sides of the seams of the two mold halves 60.

See FIG. 2B. When the two mold halves 60 are pressed and joined together, the blank 40 is placed in the spout cavity 61 and held firm. Subsequently, as shown in FIG. 2C, the injection stretch blower (not shown) is inserted in the spout 50 so that 25 kg / cm 2 of high pressure gas is blown into the blank 40, so that the blank 40 is uniformly expanded. As a result, the inner wall surfaces of the body cavity 62 and the groove 63 are supported, thereby forming the ultra-thin flexible and compressible wall 71 and two rigid support ribs 72, respectively. The support ribs 72 are strong enough to withstand external air pressure and not deform. See FIG. 2D. The finished container 70 having a uniform flexible wall structure molded by the molding method described above is separated from the two mold halves 60.

3, 4 and 5 are perspective, longitudinal and cross-sectional views, respectively, of the completed container 70. In a preferred embodiment of the present invention, the container 70 is formed to have a specific volume for holding a large amount of fluid therein. The spout 50 is formed on top of the container 70, and the fluid dispenser head 80 can be assembled to the spout 50, as shown in FIG. 6. The ultra-thin compressible wall 71 forms the body of the container 70, and the rigid, non-deformable support ribs 72 are located at specific locations on the compressive wall 71. The compressive wall 71 and the rigid support ribs 72 together form a fluid receiving chamber 73 in communication with the spout 50 located above the vessel 70.

In the preferred embodiment shown, the support ribs 72 are located symmetrically on two opposite sides of the fluid receiving chamber 73 and in the form of two strips extending longitudinally over the entire length of the fluid receiving chamber 73. Is done. It is to be understood that the support ribs 72 may be in other shapes and positions rather than being limited to the shapes and positions described above. That is, depending on the use of the container 70, two or more support ribs 72 may be provided at different locations on the fluid receiving chamber 73. In addition, the support ribs 72 may be in the form of lines, or may have any other suitable geometric cross section if the molding technique is not a problem.

In a possible embodiment, the fluid receiving chamber 73 formed by the compressive wall 71 and the rigid support ribs 72 may be molded into a bottle, cup, bag, or any other shaped container.

In the preferred embodiment described above, the compressive wall 71 is an ultra-thin flexible wall structure obtained by injection stretch blow molding. According to current injection stretch blow molding methods, the compressive wall 70 can have a wall thickness of 0.13 mm to 0.2 mm, which is an optimal pressure resistant wall thickness. On the other hand, the rigid support ribs 72 that resist air pressure have a thickness of 0.5 mm to 1 mm.

As can be seen from FIG. 6, the fluid dispenser head 80 may be assembled to the vessel 70. The fluid dispenser head 80 includes a dispenser member (not shown), such as a vacuum pump or valve, which extends into the vessel 70. When the user applies downward force to or releases the downward force from the fluid dispenser head 80, the dispenser member is reciprocated vertically in the container 70, so that the internal pressure of the container 70 A pressure differential occurs between the pressure and the external air pressure and acts on the compressive wall 71 and the support ribs 72. In this respect, according to the support ribs 72 as support lines, the compressive wall 71 contracts to compress the fluid receiving chamber 73 to eject the fluid contained in the container 70 through the fluid dispenser head 80. do. As the number of blowouts increases, the contracted compressive wall 71 of the vessel 70 gradually reduces the total volume of the vessel 70. When the compressive wall 71 of the vessel 70 is fully flattened, the remaining fluid in the vessel 70 can be drained and ejected through the fluid dispenser head 80 without leaving it.

In the present invention, the container 70 has a main body formed of an ultra-thin wall 71 with low pressure resistance, and has a molded rigid support rib 72 that functions as a support means when the ultra-thin wall 71 contracts and deforms. Include. Therefore, the pressure difference created by pressing the fluid dispenser head 80 can more efficiently discharge the fluid contained in the container from the container 70 through the fluid dispenser head 80. On the other hand, according to the wall structure of the container 70 according to the present invention, the remaining fluid remaining in the container 70 can be ejected without leaving for use.

While the invention has been described in terms of the preferred embodiments, it should be understood that various modifications and changes in the described embodiments can be made without departing from the spirit and scope of the invention, which is intended to be limited only by the claims.

1A to 1D are views showing a method of molding a conventional container by the blow molding method.

2A to 2D are views showing a method of molding the container of the present invention by the injection stretch blow molding method.

Figure 3 is a perspective view of a container having a wall portion different pressure resistance according to the present invention.

4 is a longitudinal cross-sectional view of FIG.

5 is a cross-sectional view of FIG. 3.

6 is a view showing the ejecting the fluid contained therein using the container of the present invention.

FIG. 7 is a cross sectional view showing how the wall portion of the container of FIG. 6 deforms under pressure in use; FIG.

Explanation of symbols on the main parts of the drawings

40 blank 50 spout structure

60: mold half 61: spout cavity

62: body cavity 63: groove

70: container 71: compressible wall

72 support rib 73 fluid receiving chamber

80: fluid dispenser head

Claims (7)

Pressure resistance, comprising a fluid containing chamber having a constant volume for receiving a large amount of fluid and a mouth located on top of the fluid containing chamber and in which the fluid dispenser head is assembled and sealed As a container having these different wall portions, The fluid receiving chamber is formed of a super-thin compressible wall that forms the body of the container and a symmetrical position on the compressive wall, and at least two pressure resistant, non-deformable stiffness thicker than the compressible wall. With pressure-resistible non-deformable stiff supporting ribs, The compressive wall can contract between the rigid support ribs due to the pressure difference created by pressing the fluid dispenser head, thereby contracting inward and flattened. The fluid receiving chamber is integrally formed using two mold halves by an injection stretched blow molding process, Wherein the compressive wall has a thickness between 0.13 mm and 0.2 mm and the thickness of the support ribs is 0.5 mm and 1 mm, respectively. delete delete The method of claim 1, Said support rib having a geometric cross section which can be determined according to the use of the container. The method of claim 4, wherein And the support ribs are formed by providing grooves in the parting lines of the two mold halves. The method of claim 5, The support ribs are formed by providing two corresponding grooves on two opposite sides of a seam of the two mold halves, The elongated strip of support ribs is formed at two symmetrical sides of the outer surface of the compressive wall separately in position. The method of claim 1, And the fluid receiving chamber is of a type selected from the group consisting of bottles, cups and bags.

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