DE1704287C - Device for the production of preforms for hollow bodies precipitated from 1479521 - Google Patents

Description

1 sheet of drawings

Claims (1)

1 2 it is, however, in this version that the movement Claim: guiig the shear tool an additional drive is required, its accommodation, for example Device for the manufacture of Vorformlin- in turret machines because of the large amount of space for hollow bodies, z. B. Bottles, from thermo 5 may encounter great difficulties
plastic plastic, with an injection unit The invention is based on the object of providing an injection mold for injecting the material into an injection device of the aforementioned type, with mold halves, with one of the removal of the sprue from the preforming blow core for transporting the preform to without an additional work step and without an additional blow mold, in which this is possible through a machine effort from the blow molding
This object is achieved according to the invention in that the blow mold is simultaneously calibrated by widening one or more of the bottle neck between the blow mold with the injection channel and the blow mold in the injection mold halves the injection unit connected sprue marks.daßindenSpritzformhälf-15 channels are arranged, which when the injection mold (4) is opened, one or more of the injection channels when the mold is closed along the shear-off injection mold with the injection channels (2) of the edges of the end face of the injection mold Injection unit (1) connected sprue injection unit can be moved away,
channels (3) are arranged, which when opening the An embodiment of the invention is shown in the injection mold of the injection channels (2) along ao drawing and is described in more detail below of the shear edges to the injection mold. The end face (12) of the injection unit (1) can be moved away are. Revolver automatic spray gun contains injection channels 2, the in Anguäkanäle 3 of the two injection molds as half ten 4 existing injection mold open out, if this injection mold is closed. After the injection of the plastic material 5 into the end space 10 and in part of the Rüigspaltes 7 is made of BoI- D ^; The invention relates to a device for forming a core 8 and core inserts 9 provide preforms for hollow bodies, e.g. B. Fla- 30 suddenly moved in the direction of arrow A , where- rule, made of thermoplastic material, with one through the material 5 in the annular gap 7 up to the one in the Injection unit for injecting the material into a bottle neck, not shown in the drawing, quickly Injection mold halves existing injection mold, with one shoots up. Blower core for transporting the preform to the blow molding After completion of the injection and molding process, in which this form by a blow from the blower core, the two mold halves 4 are in the direction of the emerging blow medium up to the inner wall of the blow arrows B and B ' apart. In doing so, the shape is widened along the neck between the blow core and the blow mold on the bottom surface 11 of the preform and the end while the bottle sprue located in the sprue channels 3 is calibrated at the same time. surface 12 of the injection unit 1 sheared off. The removal of such devices is disadvantageous that 40 NEN of the sprues from the sprues 3 takes place in the removal of the in the further processing and known manner mechanically or pneumatically. The sprue on the finished part and the desired sprue on the front inner bottom surfaces of the injection mold halves smooth the molding. Flick knives. Here, the surface of the front is 45 The advantages achieved with the invention exist formlings, however, the risk of damage in particular that the sprues regardless of exposed. Number, shape and arrangement without assistance, however, is also a device in which additional mechanical devices are used after the injection process has taken place between the opening of the injection mold are removed, as a result of which retracted spray nozzle and the mold a 50 cycle time is saved and also the upper mold and the shearing tool guided by the spray nozzle used the surface of the deformed part in the area of the sprues to shear off the sprue. Is smoothed disadvantageously.