Synthetic material container with reinforced corners

Abstract

A synthetic material container (1) having a bottom (2) and opposing sidewalls (3, 4) has reinforced corners (5) at their respective corner areas on the outer side. The corners (5) are designed as double-walled, with the outer walls (6) extending upwards from the horizontal height of the bottom (2) beyond a portion of the height of the sidewalls (3, 4). The double-walled corners (5) have cavities (7) that extend continuously from top to bottom and are divided by one or more ribs (8, 8'). The corners (5) with continuous cavities (7) have the advantage of longer service life in production by injection molding, thanks to better heat dissipation of the core tool. When the synthetic material container (1) according to the invention is washed with water, the continuous cavities (7) allow for more hygienic cleaning, in which rinsing water can be drained without residue.

Description

Technical Field

[0001] This invention relates to a synthetic material container for transporting and storing goods. In particular, this invention relates to a synthetic material container having reinforced corners on the outer side of the synthetic material container. Background Technology

[0002] Containers made of synthetic materials with reinforced corners are known.

[0003] The reinforcement is used to improve the impact resistance of the corner areas, especially when the containers are subjected to impact during movement and stacking.

[0004] CH567968 discloses a bottle box with reinforced corners, the reinforced corners being composed of triangular widenings of corner posts located inside the box, the triangular widenings being inclined at a 45° angle toward the bottom of the box relative to the sidewalls.

[0005] EP2383190 discloses a synthetic material container with reinforced corners, the reinforced corners being composed of T-shaped ribs extending outward from the outside of the corners and along the diagonal direction over the entire height of the container.

[0006] In addition, commercially known synthetic material containers have hollow reinforcements on the outer side of their corners at a portion of their height, the reinforcements having small slit-shaped openings at their upper ends. Summary of the Invention

[0007] According to the present invention, a synthetic material container, or plastic container, is disclosed, having a bottom and sidewalls extending vertically from the bottom to a circumferential edge. At each corner where the sidewalls intersect, the container has a corresponding reinforced corner located on the outer side, designed as a double-walled structure. For this purpose, the outer wall extends upward from the horizontal height of the lower edge of the sidewall, near the outer side of the sidewall, exceeding a portion of the sidewall's height. Thus, the double-walled corner has a cavity extending continuously from top to bottom over the entire height of the double-walled corner, wherein one or more ribs extend from the outer wall to the outside of the sidewall. Therefore, the ribs form multiple cavities in each corner between the outer wall and the sidewall of the container's corner. In particular, the hollow corner is designed to be open at its upper and lower ends.

[0008] The reinforced corner design according to the invention achieves a combination of several advantages, on the one hand, in the production process of injection molding, and on the other hand, in use, especially in the cleanliness of the container. In production, this type of container is injection molded using an injection molding machine and injection molding tools mounted on the machine. The mold consists of multiple mold components so that the injection-molded article can be demolded even after the injection molding and the synthetic material has cooled.

[0009] The mold for the container according to the invention includes an internal mold component corresponding to the internal shape and upper edge of the container, a plurality of external mold components corresponding to the outer sidewalls of the container, and a mold component corresponding to the bottom, with protruding tool core elements integrated at the corner area of ​​the bottom. These protruding tool core elements are used to form cavities for the reinforced double-walled corners of the container during the injection molding process. During the injection molding cycle, the molding elements of the multi-part mold are brought together and pressed against each other under high pressure at the mold separation section (also called the clamping section). Because the cavity provided by the reinforced corners according to the invention is continuous, the elongated protruding tool core elements can be supported at their ends over their entire cross-sectional area and over their entire circumference on the mold components corresponding to the outer sidewalls when the mold components move together.

[0010] In existing containers, the corner openings are slotted, and the core element is correspondingly smaller on its circumference. However, in this invention, the supporting surface of the core element on the mold component of the corresponding sidewall is significantly increased compared to the prior art. On the one hand, this has the advantage of reducing wear on expensive injection mold components. This is due to the fact that when the mold separation portion is engaged, i.e., when the core element contacts the mold component of the sidewall (also known as clamping), the cooling of the mold component increases due to the increased surface area. Therefore, the injection mold component can be used for a longer service life, making the overall production of such containers more cost-effective.

[0011] On the other hand, the continuous cavities at the corners offer further advantages. When the synthetic material container according to the invention is washed with water, both the interior and exterior are cleaned, wherein the container is washed upside down, i.e., with the interior space facing downwards. Because the cavities at the corners are continuous, rinsing water can flow directly out of the corners without leaving any residue and can be completely rinsed away, leaving no water in the cavities. On the other hand, in containers of the prior art, the cavities are not continuous, or only have small openings at the top, causing rinsing water to always remain and potentially leading to hygiene problems.

[0012] One or more ribs between the outer wall and the outer side wall of the double-walled corner divide the corner space into several smaller cavities, thus creating an extremely stable structure. Attached Figure Description

[0013] Figure 1 A perspective view from above shows the synthetic material container according to the invention.

[0014] Figure 2 Shown in perspective view from below Figure 1 The container in.

[0015] Figure 3Shown in top view Figure 1 and Figure 2 The container in.

[0016] Figure 4 According to Figure 3 The cross section of AA in the diagram is shown Figure 3 The container in.

[0017] Figure 5 According to Figure 1 The arrow V in the image, viewed from above, shows a magnified view of the corner of the container according to the invention.

[0018] Figure 6 According to Figure 5 Arrow VI in the image is shown in a magnified view viewed from below. Figure 5 The corner of the middle. Detailed Implementation

[0019] Figure 1 A synthetic material container, or plastic container 1, according to the invention is shown, having a bottom 2 and a short first sidewall 3 and a long second sidewall 4, the first and second sidewalls extending vertically from the bottom 2 to their respective upper edges 3' and 4'. The first sidewall 3 and the second sidewall 4 intersect at a corner, which has a reinforcement on its outer side facing away from the container interior. The reinforced corner 5 is designed as a double-walled structure for this purpose, extending from the bottom to a predetermined height of the corner; however, the corner extends only over a portion of the container height, rather than extending to the upper edge of the container. This reinforcement over a portion of the height is generally sufficient for the container's impact resistance.

[0020] The double-walled corner section 5 is formed on one hand by the outer walls of the side walls 3 and 4 respectively, and on the other hand by a second wall 6 extending in a predetermined height and width. According to... Figure 1 In the top view, cavities 7 are shown in corner 5, between side walls 3 and 4, and the additional outer wall 6. Figure 1 In the embodiment, cavity 7 is specifically designed to be completely open upwards, that is, the size of the cavity is not reduced in any way, but the opening at the upper end of the cavity has the largest size.

[0021] From the same container Figure 2 The view viewed from below also shows the cavity 7 of corner 5, which is also open downwards. Here, the opening also has its largest size at the bottom. Therefore, the cavity has a continuous opening of the largest size from top to bottom.

[0022] Figure 3 The container with reinforced corners 5, as seen from below, is shown. Each reinforced corner has multiple ribs 8 and 8' that divide the corner into multiple cavities 7.

[0023] Figure 4 Showing according to Figure 3 The cavity 7 extends continuously from bottom to top in the cross section of the middle AA, and the dividing ribs 8 and 8' extend over the entire height of the reinforced corner 5.

[0024] Figure 5 and Figure 6 The corners are shown in magnified detail in perspective views viewed from above and below. Here, lateral ribs 8 on sidewalls 3 or 4 are particularly shown, positioned at right angles to both sidewalls 3 or 4 and the reinforced corner wall 6. At each corner, another rib 8' extends diagonally inward from the corner region of the outer wall 6 to the corner region of the container where sidewalls 3 and 4 intersect. The continuous ribs 8 at right angles to the sidewalls and the diagonal ribs 8' divide the double-walled space of the reinforced corner 5 into multiple continuous cavities 7. Figure 5 and Figure 6 It also shows how ribs 8 and 8' extend over the entire height of the double-walled corner, thereby optimizing the reinforcement of the diagonal 5.

[0025] List of reference numerals

[0026] 1 synthetic material container

[0027] 2 Bottom

[0028] 3 First short sidewall

[0029] 3' upper edge of side wall 3

[0030] 4. Second longest sidewall

[0031] 4' upper edge of side wall 4

[0032] 5 corners

[0033] External reinforcing wall in the hexagonal part

[0034] 7 Continuous cavities

[0035] 8 Ribs on the side wall

[0036] Ribs extending diagonally at the 8' corner area

Claims

1. A synthetic material container (1) having a bottom (2) and a side wall (3, 4) extending vertically upwards from the bottom (2), the side wall comprising a first side wall (3) and a second side wall (4), wherein, The first side walls (3) are respectively opposite to each other and the second side walls (4) are respectively opposite to each other, and the synthetic material container (1) has a corner (5) where the first side walls (3) and the second side walls (4) intersect, characterized in that The corner (5) is designed as a double-walled corner in such a way that the corner (5) respectively has an outer wall (6) which respectively extends from a lower edge of the side wall (3, 4) on the outside of the side wall over a part of the height of the side wall (3, 4) upwards, wherein the double-walled corner (5) has a continuous cavity (7) in such a way that the lower end and the upper end of the corner (5) are respectively designed as open, the corner (5) respectively has one or more ribs (8, 8') which extend from the outer wall (6) to the outside of the side wall (3, 4) and continuously from the lower end to the upper end of the corner (5) and form a plurality of cavities (7) in the corner (5), which cavities (7) are completely open upwards and which cavities (7) are open downwards.

2. Synthetic material container (1) according to claim 1, characterized in that The first ribs (8) are respectively placed at a right angle to the side wall (3, 4) and lead to the outer wall (6) of the corner (5).

3. Synthetic material container (1) according to claim 1 or 2, characterized in that The second ribs (8') extend from the corner region of the outer wall (6) diagonally inwards to the corner region where the first side wall (3) and the second side wall (4) intersect.

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