摘要:
Handgriff (1) für Handwerkzeuge in radialer Richtung aufgebaut aus im wesentlichen drei Querschnittsbereichen mit unterschiedlicher Steifigkeit, und zwar einem ersten Querschnittsbereich, dem Griffkern (3) aus Hartkunststoff mit einer ersten Steifigkeit, einem dritten Querschnittsbereich, der Oberflächenschicht (5a) aus elastischem Kunststoff mit einer dritten Steifigkeit und dem zwischen ersten und dritten Querschnittsbereich liegenden zweiten Querschnittsbereich (5b) aus weichem elastischen Kunststoff mit einer zweiten Steifigkeit. Die zweite Steifigkeit ist geringer als die dritte Steifigkeit und geht auf ein Mittel zurück, dass im zweiten Querschnittsbereich (5b) und/oder im dritten Querschnittsbereich (5a) fixiert ist. Dieses Mittel verhindert die Migration von Weichmachern durch die einzelnen Querschnittsbereiche.
摘要:
The invention relates to a method wherein a first plastified material is injected into the cavity of an injection mould whereafter another plastified material is also injected into said cavity. The inventive method is characterised in that the first plastified material is fed into the cavity in such a way that it wets only one partial area of the cavity wall and the other plastified material is subsequently fed into the cavity so that it wets at least one part of the remaining area of the cavity wall. Said method enables injected moulded parts to be manufactured using various materials and by means of simple injection devices.
摘要:
Disclosed herein are methods and systems for the preparation of a co-injection molded multilayer plastic article. Some methods include co-extruding a combined polymeric stream having an interior core stream encased by an inner stream and an outer stream. A volumetric ratio of the inner stream to outer stream is adjusted during injection of the combined stream into the a mold cavity to alter a streamline along which the interior core stream flows thereby forming cohesion member that structurally interlocks the interior layer with the inner layer, with the outer layer or with both. Some embodiments reduce or eliminate a need for addition of an adhesive in the composite stream to prevent delamination of layers of the resulting multilayer plastic article. In some embodiments, cohesion members may be employed to produce a desired cosmetic effect in a resulting article.
摘要:
A Method for producing a module (14), comprises the steps of providing a molding apparatus (10) having an injection unit with a barrel housing a feed screw, providing a mold with a cavity configured to the shape of the module being produced, providing a polymeric material composition to the feed screw, connecting the barrel with the mold and actuating the feed screw so that the polymeric material is injected into the mold, removing the module (14) from the mold, and marking the module (14) with a predetermined design by means of a laser (200).
摘要:
An apparatus for injection molding two compatible polymeric materials, in which two or more plasticizing zones (40, 42) on a screw (26) are used to simultaneously or sequentially plasticize the two materials into a common accumulation space (48) through separate passageways. The charge comprising multiple layers of material is then injected into a closed mold by means of forward axial motion of the screw with respect to its enclosing barrel (10). Once inside the mold, the first material forms a skin layer, totally or partially surrounding the other material. In this way a part having a plurality of material properties may be produced in a single operation.
摘要:
Eine Spritzgießmaschine zur Herstellung von mehrschichtigen Kunststoff- Formteilen aus einem einheitlichen Kunststoff umfasst - eine Plastifiziereinheit (1) mit einer Plastifizierschnecke (7), - ein Spritzgieß Werkzeug (10) mit einem Paar von Formkavitäten (13, 15), von denen eine Vor-Kavität (13) für einen Vorspritzling (14) und eine Nach-Kavität (15) für einen auf einen Vorspritzling (14') zu spritzenden Nachspritzling (16) bestimmt ist, mit einem Verteiler (21), der die Einspritzdüse (20) der Plastifiziereinheit (1) über zwei Zweigkanäle (23, 25) mit der Vor- und Nach-Kavität (13, 15) verbindet, und mit jeweils einem Verschlussorgan (24, 26) in den beiden Zweigkanälen (23, 25), sowie - folgendes Betriebs verfahren beim Spritzgießen: = Spritzen des Vorspritzlings (14) in der Vor-Kavität (13) bei geschlossenem Verschlussorgan (26) im Zweigkanal (25) zur Nach-Kavität (15), = im selben Schnecken-Einspritzhub Spritzen des Nachspritzlings (16) auf einen in der Nach-Kavität (15) sitzenden Vorspritzling (14') bei geöffnetem Verschlussorgan (26) im Zweigkanal (25) zur Nach-Kavität (15) bei gleichzeitigem Kühlen des in der Vor- Kavität (13) sitzenden Vorspritzlings (14), und = gleichzeitiges Beaufschlagung von Vor- und Nach-Kavität (13, 15) am Ende des selben Einspritzhubes der Plastifizierschnecke (7) mit Nachdruck bei geöffneten Verschlussorganen (24, 26) in den Zweigkanälen (23, 25) zur Vor- und Nach-Kavität (13, 15) unter Kühlen von Vor- und Nachspritzling (14, 16).
摘要:
There is disclosed an in-mould labelling process for the manufacture of a labelled article comprising the steps of: feeding a labelstock web into a mould; forming an article in the mould such that the formed article contacts and effectively adheres to a label of the labelstock web; detaching the adhered label from the labelstock web; and removing the formed and labelled article from the mould.
摘要:
The invention refers to a method for injection moulding of product incorporating an upper part (11) and at least one connection integrated therewith, and where the mould chambers (16) of the upper part have flow paths of different length in different directions from a melt intake (15), whereby adjustable cores (19) in said mould chambers (16) are individually adjusted for giving different flow resistance in different parts of the mould chambers for the purpose of ascertaining that the melt will reach all parts of the moulding chamber of the upper part substantially at the same time, and also a tool for performing the method, which incorporates a combination of a fixed tool half (13), a movable tool half (14) incorporating mould pressure cores (19), which are arranged to be movable in a direction in towards a moulding chamber (16), which is in contact with a melt intake (15), moulding cavities (17) for connections provided in movable connections cores (30), which moulding cavities (17) are in contact with the moulding cavity (16) via restrictable openings/flow channels (18).
摘要:
A molded vehicle component (10) having a skin (14) and a lower density core (16) formed by a co-injection molding process. In a first phase, a first material for forming the skin of class A surface material is injected into a mold to partially fill the mold cavity (104). Thereafter, in a second phase, a second material is injected into the same cavity (104) to complete filling of the mold cavity (104). The second material can flow only to portions of the part where the first material is still molten and displaces the molten core of the first phase, pushing it away from co-injection gates until the mold cavity is full. The second material is pre-treated with a chemical blowing agent in order to reduce part weight by foaming the core material. The finished co-injection molded part (10) has one material on all visible class A surfaces (14) and a core (16) that is a different, less dense material.
摘要:
There is disclosed an in-mould (61) labelling process for the manufacture of a labelled article comprising the steps of: feeding a labelstock web (2) into a mould; forming an article in the mould such that the formed article contacts and effectively adheres to a label of the labelstock web; detaching the adhered label from the labelstock web; and removing the formed and labelled article from the mould. At least one of the mould parts comprises a slit or tunnel (63) which intersects the mould cavity.