DD126565B5 - BLASH-MOLDED PLASTIC ASSEMBLY CAPABLE WITH A PLASTIC COVER - Google Patents

Abstract

1490487 Blow moulded barrel MAUSER K-G 8 July 1976 [4 Oct 1975] 28423/76 Heading B5A [Also in Division B8] A barrel of plastics material is formed with an outwardly extending peripheral flange 6 of solid section and of a thickness greater than the barrel wall adjacent the barrel opening, by blow moulding a tube between mould halves 2, 3, Fig. 1, to form the wall of the barrel into an outwardly projecting hollow rib 4 and then, whilst the wall is still plastic, displacing the mould halves 2, 3, towards each other to collapse the axially opposite walls of the rib 4 together to form the rib into the flange 6. The blow moulded barrel is moulded with a corrugated neck portion 5, from above which blow moulded material is cut away to form the barrel opening. The flange 6 is outwardly tapered, between lower and upper surfaces which are respectively inclined to and at right angles to the barrel axis. The barrel is closed by a lid 11 sealing to the top of the neck 5 at a seal 17, and having an inner skirt 13 contacting the neck 5 and an outer skirt 14 terminating at an outwardly extending flange 15, at which the lid is clamped to the flange 6 by a ring 16.

Description

The invention relates to a blow-molded, with a plastic lid lockable plastic drum for storing and transport of preferably liquid material.

It is known to form a plastic lid closable plastic barrels so that the barrel has a distance below the barrel opening from the barrel sheath projecting Bordur against which abuts the radially outwardly angled outer flange of the turned on the opening neck of the barrel cover occurring axial load , and the clamping ring is connected to the lid by means of an inner edge projecting over the lid base, protruding into the barrel opening, and a sealing ring inserted between the lid inner edge and outer rim of the lid against the upper edge of the mouth neck is pressed.

However, the protruding from the barrel sheath Bordur acts when occurring vertical stacking load, as it arises when stacking several filled barrels, such as an expansion fold, which is compressed unevenly under load in the axial direction of the barrel. This can overturn the barrel stack and the lid can be released from its sealing layer.

It has been provided to reinforce the Fassbordur over the Bordurumfang evenly distributed, halbkalottenförmige indentations. Here, the stacking load is almost infinitely from the opening edge in the barrel shell over. A compression of the bordure is largely eliminated.

The disadvantage here, however, is that the indentations can not be made arbitrarily deep to make the lid attachment safer. The radial rigidity of Fassbordur is reduced by the indentations. Therefore, the Bordurbereich must be stabilized by adding material in the radial direction. In addition, after emptying the barrel residues in the Bordur set.

In one, described in GB-PS 1275949 lid barrel acting from the barrel sheath inwardly acting Bordur when occurring vertical stacking load acts as a crease, which is compressed unevenly under load in the axial direction of the barrel. This can overturn the barrel stack. Also in the lateral direction lying in the clamping area Hohlbordur offers too low a resistance moment. During the barrel transport of barrels stacked on top of each other, the lateral oscillatory movements on the lid areas of the lower barrels cause the strap, which engages beneath the tubing, to slide out of the closed position, so that the barrel opens. The upper ring leg engages over the head edge of the barrel and the lower leg is hooked behind the barrel Bordur. To accommodate dangerous products such barrels are not suitable and not allowed. Upon the crash of a filled barrel and its impact on the peripheral edge of the lid of the clamping ring is blasted or deformed so permanently that the seal seat of the lid is destroyed. In any case, the clamping ring is unprotected and given any deformation force-also the vertical stacking load price.

Other wide-mouth barrels with lid closure, as they emerge, for example, from DE-PS 2008111, also have a projecting out of the barrel shell Hohlbordur, which acts like an expansion fold. However, here is a part of the stacking load on the outer edge of the lid in a mantle zone derived below the Bordur, but there is still so much elasticity that falling over stacked barrels can not be prevented. Therefore, one has to stiffen the Fassbordur about the Bordurumfang evenly distributed, halbkalottenförmige indentations provided. Here, the stacking load is almost infinitely from the opening edge in the barrel shell over. A compression of the bordure is largely eliminated.

What is peculiar to these plastic drums, the use of Weichpolyäthylenen as cover material, since the lid edge must be segmented in order to be used in the edge shape of the barrel can. The individual segments must be able to spread when placing the lid. When using soft material, however, the lid can not stabilize when loaded on the side of the stack.

Although this does not apply to the lid and barrel design according to GB-PS 1 275949. Here, instead of an earlier sheet metal cover such a hard polyethylene be used, so that the lateral rigidity is improved. The lid is designed as slip lid without edge segmentation. Nevertheless, the Bordurbereich remains below the lid edge in the axial and radial direction yielding soft and thus has the disturbing shortcomings. Also, the clamping ring is unprotected.

According to DE-AS 1130151 and FR-PS 1 227 794, which are essentially the same content, although a blow-molded container is known in which a spaced below the barrel opening Bordur is present, the Fassbordur from one of the container radially outward protruding massive upset skirt flange is made and also the average thickness of the shell flange is about twice the container wall thickness and the supernatant of the Bordur is considerably larger than the container wall thickness. However, here the plastic barrel is not lockable with a plastic lid. It thus also lacks an interaction of the lid with the edge of the opening neck, further immersed especially in the barrel opening to the opening neck lid inner edge, the sealing ring between the lid inner and outer edges and the clamping ring. The known containers therefore differ genus considerably from the application according to the plastic barrel. In addition, the known compressed flanges of these containers have nothing to do with the closure according to the application, but are mounted on the container bottom or on the side walls of the container. The known embodiments also do not suggest to treat the seal gently or to improve the stackability of a container.

The aim of the invention is to increase in plastic lid with closable plastic barrels, the performance characteristics and to achieve an increase in productivity in the production of these barrels.

The invention is based on the object at a blow-molded, closable with a plastic lid and clamping ring plastic barrel for storing and transporting preferably liquid material the sealing closure of the wide Faßhalses such that with uniformly gentle sealing loading the stackability and strength of such barrels is improved , This object is achieved in that the Faßbordur consists of one of the container wall radially outwardly projecting solid, compressed Mantelflansch, the average thickness of the Mantelflansches is about twice the container wall thickness, the supernatant of the Bordur is considerably larger than the container wall thickness, and that the lid has an outer edge flange formed on the lower edge, which engages over the clamping ring.

Due to the deformation of the Kaßbordur to a radially outwardly angled, solid Mantelflansch the formation of an unsprung in the axial direction, positive stop surface for the rectified Außenrandflansch the lid is possible. The now stiffened in the circumferential direction sheath flange forms together with the Außenrandflansch the lid within the clamping ring a laterally displacement-free stiffening of the barrel opening area. Abruptly occurring axial loads are derived in an overstressed at no point and thus uniform acting seal directly into the barrel casing. Since an insertion limit of the lid remains due to the effective limitation within the sealing elasticity, no loosening can take place within the clamping ring.

The clamping ring is arranged protected. Due to its low position it is practically preceded by a baffle zone in which the impact energy is consumed on impact of a filled barrel on the lid edge. Likewise, no stacking forces get into the ring.

The invention will be explained in more detail using an exemplary embodiment. The accompanying drawing shows a section of the barrel head with attached lid in longitudinal section.

From the barrel trough 1, the barrel head gradually increases and merges into a nearly vertical annular region, which is followed by the radially outwardly directed, closed shell flange 3. From the inner edge of the casing flange 3, the opening neck 5 rises upward, which assumes a curved course in the embodiment. On the opening neck 5, the cover 2 is turned up, the radially outwardly directed outer edge flange 8 is stretched with a clamping ring 4 against the paperboard formed by the flange 3. In this case, the inserted between the lid outer edge 6 and inner lid edge 7 sealing ring 9 is pressed against the upper edge of the opening neck 5.

Claims (1)

Blow-molded, with a plastic lid lockable plastic barrel that has a spaced below the barrel opening Bordur, against the edge of the aufgehülpten on the opening neck of the barrel cover occurring axial load, with a projecting over the lid bottom, dipping into the barrel opening inner edge rests against the opening neck and an inserted between the lid inner edge and lid outer edge sealing ring is pressed against the upper edge of the opening neck by means of a clamping ring which holds down the Bordur cross the lid, characterized in that the Fassbordur from one of the container wall radially outwardly projecting solid, compressed Sheath flange (3), wherein the average thickness of the sheath flange is about twice the container wall thickness, the supernatant of the Bordur is considerably larger than the container wall thickness, and that the cover (2) angefor a angefor at the bottom mten outer edge flange (8), which engages over the clamping ring (4). For this 1 page drawing