| 摘要 |
757,691. Making ampoules &c. SOC. ANON. DES MANUFACTURES DES GLACES ET PRODUITS CHIMIQUES DE ST.-GOBAIN, CHAUNY ET CIREY, Jan. 23, 1952 [Jan. 23, 1951], No. 1893/52. Class 56 [Also in Group V] Successive portions of a moving tube of plastic material are enclosed in a mould and sucked against the walls of the mould. Figs. 5 to 7 illustrate a three-stage method of making ampoules in which (1) an extruded tube 2, which may be of glass, descends between two open mould halves 3, which are then closed around the tube as in Fig. 5. Each mould half is carried by a jacket 5 pivoted at 10 (Fig. 8). (2) Suction is applied to the mould space 8 through passages 7, 6, 9; whereby the tube takes the shape of the mould (Fig. 6). During this suction stage two fingers 11 descend to draw out the lower point of the ampoule 12 being made (3). The mould is opened (Fig. 7) and a second pair of fingers 14, initially disposed above the mould, descend and draw the formed ampoule down, the fingers 11 being moved aside. The fingers 11, 14 then move back to the Fig. 5 position and the sequence is repeated. The ampoules thus moulded, form a chain, and may be separated from the chain (as shown, in pairs) by a blowpipe 15 which also seals the ends. The chain may be cut into long lengths, all the ampoules therein being later filled at the same time. As shown, the mould is hexagonal in cross-section and volumetric graduations A are formed on the ampoule. If the mould jams it may be prised open by inserting a tool into a gap 10a between the halves. In a modified process, Fig. 9, the extruded tube is engaged by a series of travelling moulds, one mould being shown in five successive positions. Between the third position 19b and the fourth 19c, the mould moves faster than the extruded tube, whereby the neck portions are drawn out. In another modification (Fig. 10, not shown) for making flat-bottomed bottlelike ampoules, cutting edges on the base of the two mould parts form the flat bottom of the ampoule. Flasks and bottles may be made. The direction of extrusion may be upward or in a direction inclined to the vertical. |
