Receptacles – End wall structure – Having an outlet or inlet opening
Patent
1997-04-10
1998-10-20
Pascua, Jes F.
Receptacles
End wall structure
Having an outlet or inlet opening
220613, 215 44, 383906, B65D 640
Patent
active
058233830
DESCRIPTION:
BRIEF SUMMARY
The invention relates to a weld pourer component of a plastics material for welding to a plastics container part and more particularly to a weld component for connecting to a container part in the form of a refill bag made of a film-like plastics material for the storage of e.g. liquid or pasty detergents.
BACKGROUND
Since a weld pourer component is a dimensionally stable plastics molding, difficulties may be experienced in welding together the different plastics materials due to the elasticity of the film material of the container part, since the film material tends to tear off along the welding zone due to overheating and the like. This is why it is principally desirable, for reasons of good heat transport or in avoiding overheating, to form welding ribs on the weld component as thin-walled as possible. Thin-walled welding ribs may, however, create notch-sensitive welding zones in the film material. It has already been proposed to perform welding ahead a background wall of the weld component so that the film material during welding is able to come into contact with and be supported by the background wall. The disadvantage of this measure is the detrimented removal of heat from the welding zone and thus the danger of the film material being overheated.
SUMMARY OF THE INVENTION
The object of the invention is to provide a plastic weld pourer component of the type mentioned above which permits cost-effective manufacture and may be processed without problems. More particularly, the object of the invention is to prevent tearing off of the film material during welding and in subsequent use.
For achieving this object the weld pourer component according to the present invention for welding to a plastics container part made of film-like plastics material, comprises at least one welding rib extending circumferentially of a neck portion defining a discharge passage and having a welding edge provided on a welding flash integrally formed on a rib base portion of the welding rib and having a smaller dimension in directions perpendicular to the circumferential direction than that of the rib base portion.
Accordingly, each welding rib comprises a relatively thick-walled rib base portion which may have a rounded peripheral surface to which a narrow thin-walled welding web or flash is integrally formed, the outer circumferential edge of which forms a welding edge or face. Due to the thin-walled configuration of the welding flash the temperatures of the film during welding can be readily maintained at such a level that overheating of the film material is effectively avoided.
A firm weld connection is attained since the welding can be controlled so that the welding flash is melted down during welding to such a degree that it practically disappears, thereby permitting a supporting contact of the film material with the rounded relatively wide outer circumferential surface of the rib base portion. As a result the forces occuring during welding and in later use between the weld component and the film bag can be transmitted at the welding zone free of any notch effects to a substantial degree. Thus by surprisingly simple means an effective measure in preventing tearing of the film material is achieved by the invention. Since the rib base portion of the weld component is not involved in the welding operation, or only in an indirect manner, it can be optimized as regards a good heat transport from the welding zone which is a further effective means in preventing the formation of cracks in the region of the welding zone. More particularly, each welding rib may be provided with a large heat-transporting surface like a cooling fin. A thin-walled partition may be provided between adjacent welding ribs for increasing stability, which fixes the radial and axial positions of the welding ribs with respect to each other. Further the weld pourer component in accordance with the invention may be divided along an axial plane, more particularly in the axial center plane, in which each separate portion comprises a discharge passage. Each s
REFERENCES:
patent: 3690524 (1972-09-01), Harberhauer
patent: 4732299 (1988-03-01), Hoyt
Georg Menshen GmbH & Co. KG
Pascua Jes F.
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