TWI841369B - Plastic container with a cut-resistant lip part - Google Patents

Abstract

The present invention provides a plastic container with a cut-resistant lip part, comprising a thin shell-shaped main body and a ring-shaped lip part. The main body extends radially outward to form the lip part, which has a first annular surface and a second annular surface on its radial outer periphery. The diameter of the first annular surface is larger than that of the second annular surface, and the difference between the radius of the first and second annular surfaces is 0.05-0.5 mm. A circular joint surface connects the bottom edge of the first annular surface and the top edge of the second annular surface. The distance between the bottom edge of the first annular surface and the bottom edge of the lip part along the axial direction of the lip part is 0.15-2.4 mm. The lip part is refrained from cutting the finger, which helps with vacuum forming or blow molding technology, the consumption of plastic flakes is reduced, thus the formation of mold is simplified.

Description

Plastic container with cut-resistant lip

The present invention relates to a plastic container made by vacuum forming or blow forming; in particular, to an innovative structural form of a plastic container with a cut-proof lip.

The plastic container comprises a cup-shaped shell and a ring-shaped lip, wherein the interior of the shell forms a space for accommodating articles, the space extends upward to the top of the shell, the top of the shell radially outwards forms a thin sheet-shaped lip, and the outer side of the lip bends downward to form a ring-shaped vertical edge.

A plastic embryo sheet is processed by vacuum forming technology or blow forming technology. When the embryo sheet is formed into the plastic container, the molding mold presses the embryo sheet and uses air pressure to expand the embryo sheet on one side in the thickness direction and thin it to form the thin shell body. The mold cuts the outer periphery of the pressed part of the embryo sheet, and the pressed part of the embryo sheet cooperates with the design of the mold to form the lip edge and the vertical edge. During the molding process of the lip edge and the vertical edge, the pressing effect of the mold makes the thickness of the lip edge and the vertical edge usually slightly larger than the thickness of the thin shell body, but still smaller than the thickness of the embryo sheet before being pressed by the mold.

The above-mentioned plastic container has been found to still have the following problems and disadvantages in actual application experience: when the user holds the container, in addition to holding the side periphery of the thin shell, the fingers often touch and grasp the thin lip and the vertical edge. When the mold cuts the blank to form the lip and the vertical edge, the edge of the vertical edge is easily sharpened by the shear force of cutting. The weight of the container and the items inside the space is , which increases the force of the vertical edge pressing the finger in contact with the bottom edge. The sharp bottom edge of the vertical edge can easily cut the finger. Usually, the bottom edge of the vertical edge can be further bent toward the thin shell to form an annular curling edge. However, the formation of the annular curling edge makes the mold complicated, which is not conducive to the use of vacuum forming or blow molding technology to form the plastic container, and increases the loss of the embryonic sheet.

The main purpose of the present invention is to provide a plastic container with a cut-resistant lip. The technical problem to be solved is to explore and innovate a new type of plastic container with a more ideal and practical performance.

Based on the above-mentioned purpose, the technical feature of the present invention to solve the problem is mainly that the plastic container with a cut-proof lip is obtained by vacuum forming or blow molding a plastic blank;

The plastic container includes a thin shell-shaped main body and an annular lip, wherein a space is formed inside the main body for accommodating articles, and the space extends upward to the top of the main body, and the top of the main body radially outwardly forms the lip, and the radial outer periphery of the lip forms a first annular surface and a second annular surface, the diameter of the first annular surface is larger than the diameter of the second annular surface, and the first annular surface is The difference between the radius of the annular surface and the radius of the second annular surface is 0.05-0.5 mm. A circular joint surface is formed between the first annular surface and the second annular surface. The joint surface connects the bottom edge of the first annular surface and the top edge of the second annular surface. The distance between the bottom edge of the first annular surface and the bottom edge of the lip along the axial direction of the lip is 0.15-2.4 mm.

The main effects and advantages of the present invention are that the finger is not easily cut by the lip, and it is convenient to use vacuum forming or air blowing forming technology to form, the loss of the plastic embryo is reduced, and the mold structure is simplified.

Please refer to Figures 1, 2, 3, and 4, which are preferred embodiments of the plastic container with a cut-resistant lip of the present invention. However, these embodiments are for illustrative purposes only and are not limited to this structure in patent applications.

The preferred embodiment of the plastic container with the cut-proof lip is obtained by vacuum forming or blow molding a plastic blank (not shown). As shown in FIGS. 1 to 4, the preferred embodiment of the present invention comprises a thin shell-shaped main body 10 and an annular lip 20, wherein a space 12 is formed inside the main body 10 for accommodating articles, and the space 12 extends upward to the top of the main body 10, and the top of the main body 10 radially outwardly forms the lip 20, and the radial outer periphery of the lip 20 forms a first annular surface 21 and a second annular surface 22, and the diameter of the first annular surface 21 is larger than that of the second annular surface 22. The diameter of the annular surface 22, and the difference between the radius of the first annular surface 21 and the radius of the second annular surface 22 is 0.05-0.5 mm, wherein 0.05-0.15 mm is preferred. An annular connecting surface 23 is formed between the first annular surface 21 and the second annular surface 22, wherein the connecting surface 23 connects the bottom edge of the first annular surface 21 and the top edge of the second annular surface 22, and the distance between the bottom edge of the first annular surface 21 and the bottom edge of the lip 20 along the axial direction of the lip 20 is 0.15-2.4 mm, wherein 0.3-2.3 mm is preferred.

The connecting surface 23 is a plane extending along the diameter direction of the lip 20. The connecting surface 23 can be replaced by a cone or other regular or irregular surface, thereby forming a modified embodiment based on the modification of the preferred embodiment.

By means of the above-mentioned structural assembly and technical features, the plastic container with the cut-resistant lip of the present invention is used as shown in FIG. 4. The first annular surface 21 and the second annular surface 22 are relatively structured in space. The difference between the radius of the first annular surface 21 and the second annular surface 22 is 0.05-0.5 mm. The bottom edge of the first annular surface 21 and the lip are connected to each other. The distance between the bottom edge of the lip 20 and the bottom edge of the lip 20 along the axial direction of the lip 20 is 0.15-2.4 mm. When the user holds the preferred embodiment and grasps the radial periphery of the lip 20, the finger 90 not only contacts the first annular surface 21 and may contact the bottom edge of the lip 20, but also the lip 20 contacts the relatively soft fingertip of the finger 90, causing the finger 90 to contact the lip 20. The relative pressure formed by the weight of the article contained in the space 12 acting on the finger 90 will not be concentrated on the portion adjacent to the first annular surface 21 and the joint surface 23, but can be effectively dispersed, thereby reducing the relative force of the portion adjacent to the first annular surface 21 and the joint surface 23 on the finger 90. The finger 90 is not easily cut by the portion adjacent to the first annular surface 21 and the joint surface 23, and there is no need to form the vertical edge or the curling edge described in the prior art, which is conducive to using vacuum forming or blow molding technology to form the preferred embodiment, and the loss of the plastic embryo sheet is reduced. In the vacuum forming or blow molding process, the structure of the mold used to form the preferred embodiment is simplified.

The radial outer periphery of the lip 20 forms a third annular surface 24, the bottom edge of the lip 20 forms an annular bottom surface 25 along the radial direction of the lip 20, the bottom edge of the second annular surface 22 and the top edge of the third annular surface 24 are connected, and the bottom edge of the third annular surface 24 and the radial outer edge of the bottom surface 25 are connected.

The bottom surface 25 is a plane extending along the diameter direction of the lip 20. The bottom surface 25 can be replaced by other regular or irregular surfaces to form a modified embodiment based on the modification of the preferred embodiment.

The radial cross section of the third annular surface 24 is selected to be in the shape of an arc, the bottom edge of the second annular surface 22 and the top edge of the third annular surface 24 are tangentially connected, and the bottom edge of the third annular surface 24 and the radial outer edge of the bottom surface 25 are tangentially connected.

A circular protrusion 26 is raised on the top edge of the lip 20 , and the diameter of the protrusion 26 is connected to the first circular surface 21 outward.

3: A portion of Figure 2 is enlarged and shown in Figure 3 10: Main body 12: Space 20: Lip 21: First annular surface 22: Second annular surface 23: Joint surface 24: Third annular surface 25: Bottom surface 26: Convex hillock 90: Finger

FIG1 is a three-dimensional view of a preferred embodiment of the present invention. FIG2 is a partially enlarged cross-sectional view of the lip of a preferred embodiment of the present invention. FIG3 is a partially enlarged view of FIG2. FIG4 is a partially enlarged view of a finger touching the lip of a preferred embodiment of the present invention.

3: A portion of Figure 2 is enlarged and shown in Figure 3

10: Subject

12: Space

20: Lips

21: First circular ring surface

22: Second circular ring

24: The third torus

25: Bottom

26: convex hillock

Claims (5)

A plastic container with a cut-proof lip is obtained by vacuum forming or blow molding a plastic blank. The plastic container includes a thin shell-shaped main body and an annular lip. A space is formed inside the main body for accommodating articles. The space extends upward to the top of the main body. The top of the main body radially outwardly forms the lip. The radial outer periphery of the lip forms a first annular surface and a second annular surface. The first annular surface is The diameter of the first annular surface is larger than the diameter of the second annular surface, and the difference between the radius of the first annular surface and the radius of the second annular surface is 0.05-0.5 mm. An annular joint surface is formed between the first annular surface and the second annular surface. The joint surface connects the bottom edge of the first annular surface and the top edge of the second annular surface. The distance between the bottom edge of the first annular surface and the bottom edge of the lip along the axial direction of the lip is 0.15-2.4 mm. A plastic container with a cut-resistant lip as described in claim 1, wherein the difference between the radius of the first annular surface and the radius of the second annular surface is 0.05-0.15 mm, and the distance between the bottom edge of the first annular surface and the bottom edge of the lip along the axis of the lip is 0.3-2.3 mm. A plastic container with a cut-resistant lip as described in claim 1, wherein the radial outer periphery of the lip forms a third annular surface, the bottom edge of the lip forms an annular bottom surface along the radial direction of the lip, the bottom edge of the second annular surface and the top edge of the third annular surface are connected, and the bottom edge of the third annular surface and the radial outer edge of the bottom surface are connected. A plastic container with a cut-resistant lip as described in claim 3, wherein the radial cross-section of the third annular surface is arc-shaped, the bottom edge of the second annular surface and the top edge of the third annular surface are tangentially connected, and the bottom edge of the third annular surface and the radial outer edge of the bottom surface are tangentially connected. A plastic container with a cut-resistant lip as described in claim 1, wherein the joint surface extends along the diameter direction of the lip.

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