Method and apparatus for producing hollow injection molded parts

Abstract

The invention relates to a method for manufacturing hollow injection molded parts, in particular primary packaging devices for medical applications, by an injection molding method, comprising the following steps: a) providing a first female mold tool having a first mold cavity and being formed as a male the core of the mold tool; b) the core is introduced into the first cavity to form the first cavity, the core extends beyond the cavity in the axial direction (X) such that the core is in contact with the first female mold tool and / or Or be in operable contact with the receiving element; c) inject the first plastic material into the first cavity, thereby forming the first part of the injection molded part; d) transfer the first part of the injection molded part to the second cavity; e) inject the second plastic material Material is injected into the second cavity such that the second portion is formed directly on the first portion of the injection molded part.

Description

technical field [0001] The present disclosure relates to methods and apparatus for manufacturing hollow injection molded parts by injection molding methods. Background technique [0002] Such hollow injection-molded parts are used in particular to form primary packaging devices for medical applications. These are especially syringe bodies. However, such a primary packaging device may also be a vial, an ampoule or a medical container. Such primary packaging devices are usually designed as elongated hollow cylinders and are made of thermoplastic. Typically, such primary packaging units are produced by injection molding. In this case, a mold core is introduced into the mold cavity, thereby defining the cavity. Injection moulded parts or primary packaging devices are then formed by injecting the plastic material. In this case, it refers to production with a single shot. [0003] However, in the case of particularly thin and / or long primary packaging devices, such as in the...

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Problems solved by technology

[0004] Furthermore, the configuration of the distal end of the packaging device is in many cases limited by the fact that the injection mold or mold can only be configured to a limited extent

[0005] Finally, if a syringe body is produced with an integrated piercing device (such as a needle or cannula) or the like, it will be difficult to place this piercing device accordingly accurately in the mold in the case of the aforementioned elongated and / or thin syringe bodies of

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