摘要:
Die Erfindung betrifft ein Verfahren zur Herstellung eines Preforms (11) wobei der Preform (11) nachdem er spritzgegossen wurde noch heiss in eine Abkühlvorrichtung (25) eingesetzt wird, welche Abkühlvorrichtung (25) einen Innenraum (29) aufweist, dessen Innenkonturen den Aussenkonturen des Preforms entsprechen, und zwischen den Innenkonturen des Innenraumes (29) und den Aussenkonturen des Preforms (11) ein Unterdruck erzeugt wird. Der beim Spritzgiessen an dem Preform (11) entstandene Anspritzpunkt (23) wird durch den Unterdruck an einen an der Innenkontur vorhandenen Stempel (39) gedrückt und an dem Stempel (39) verpresst.
摘要:
The invention relates to a preform for producing a plastic container in a stretch blow molding method, which preform has an elongate, tube-like preform body, which is closed at one longitudinal end of the preform body by means of a preform bottom and which has a preform neck at the other longitudinal end of the preform body. At least in some regions, the preform is composed of polyethylene furanoate, which, in the production of the preform, has a viscosity of 0.75 dL/g to 0.9 dL/g measured according to a measurement method as per ASTM D4603 and a water content of less than 50 ppm. The invention further relates to a method for producing the preform, to a stretch blow molding method for producing a container from the preform, and to a container resulting therefrom.
摘要:
The invention relates to a self-closing valve (V) for distributing a product (6) that is in particular liquid or pasty. Said valve comprises a valve membrane (1), which is convex when viewed from the product side, at least in the distribution zone (2). According to the invention, to achieve a simple, operationally reliable construction, the valve membrane (1) comprises a retaining ring (5), formed by insert moulding, on its periphery.
摘要:
The invention relates to a device (V) for dispensing portioned amounts, such as for example a WC cleaning/disinfecting liquid and/or a fragrance, comprising a reservoir (2) in which fluid product (1) is housed. The liquid product (1) forms a first free level (Sp1) and is associated with a closed space (3). The aim of the invention is to produce exactly reproducible portioned amounts of fluid product. Said aim is achieved, whereby the closed space (3) is formed on the upper side of the reservoir (2), a product opening (6) is embodied in the lower region (U) of the reservoir (2), connected to a first receiver basin (10), in which the fluid product (1) forms a second free level (Sp2) at a level closing off the product opening (6) and a second receiver basin (11) is provided, connected to the first receiver basin (10) below the free level (Sp2), comprising an overflow (U) for the dispensing of the portioned amount of fluid product for dosing.
摘要:
The invention relates to an extrusion blow-molded plastic container (1) that has a container body, which is closed by a container base, and a container neck, which is provided with a pour opening. An inner wall of the container neck has at least one calibrated structuring. In order to produce a plastic container (1) with a container neck designed according to the invention, a portion of a single-layer or multilayer plastic tube which is extruded continuously or discontinuously from an extrusion head is introduced into a mold cavity of a blow molding tool. The tube section which can be found in the mold cavity is inflated into the plastic container so as to correspond to the mold cavity using a gas, which is blown into the tube section using positive pressure, by means of a calibrating blow mandrel (2), which is inserted into the tube through an opening in the blow molding tool, and the plastic container is cooled.
摘要:
A description is given of a method for ensuring the dimensional stability of pouring-out openings in or on a plastic container produced in an extrusion blow moulding process, in particular for calibrating said openings. This involves placing into a cavity (4) of a blow mould (1) a portion (20) of a parison extruded with one or more layers through an extrusion die and inflating it as provided by the enclosed cavity by means of a calibrating blow pin (11), wherein usually at least one of the pouring-out openings of the plastic container is predefined, in particular calibrated, with regard to its inside diameter and its inner contour. After that, the fully inflated plastic container is removed from the mould. In the case of the method according to the invention, all of the pouring-out openings (33, 35) of the plastic container (30) are calibrated substantially at the same time by the inserted calibrating pin (11). For this purpose, the calibrating blow pin (11) is formed as a double calibrating blow pin with two calibrating regions, and the double calibrating blow pin is inserted axially into the portion (20) of the parison once a head plate (5) of the blow mould (1) has been closed, but before the blow mould (1) has reached its fully closed position. A description is also given of a plastic container with pouring-out openings calibrated by the method according to the invention.