Patent GB-635331-A (GB)
Title: Improvements relating to the manufacture of lipstick
IPC: B29C33/00
Filed: 1948-02-25
Abstract: 635,331. Moulding lipsticks. ASHBEE, R. D. Feb. 25, 1948, No. 5573. [Class 87 (ii)] Lipsticks are made and inserted into casings by casting the molten material in two-part moulds and moving one part of the mould axially relatively to the other part after solidification of the material, and after a casing has been applied to a projecting end of the lipstick, to detach the cast article from one of the mould parts. Molten material 7, Fig. 2, is supplied to a two-part mould 1, 2 through a plate 4 provided with a peripheral flange to contain excess material above the plate. The excess material is then scraped off and the plate 4 removed axially while movement of the lipstick &c. is prevented by a peg in axial alignment therewith. A lipstick casing 8, Fig. 5, is mounted in a plate 9 and applied to the portion of the lipstick projecting above the mould. The mould part 2 is then moved upwardly, Fig. 6, while the part 1 remains stationary, thereby detaching the lipstick from the part 1, after which the mould part 2 is returned into correspondence with the part 1 and the lipstick holder, complete with lipstick, is removed from the plate 9. A number of moulds may be mounted in a body 21, Fig. 8, around which cooling fluid is circulated, the mould parts 1 being carried by a fixed bar 10, and the mould parts 2 being carried by a bar 14 which may be vertically reciprocated by a rock shaft having pinions 17 engaging teeth on the bar, the rock shaft being actuated by a handle 19. A plate 4, Fig. 2, having apertures corresponding to the moulds and dowelled to ensure registration therewith is placed on the body 21, Fig. 8, and a peripheral flange applied thereto after which molten material is supplied to the moulds. The flange is removed after solidification of the material and excess material is scraped off the plate 4. A plate 33, Fig. 17, with guide pins 35 and pegs 34, corresponding to the moulds is then applied to the plate 4 and the plate 4 is lifted to the upper dotted line position and removed with the plate 33 thus leaving the upper ends of the lipsticks clear of the moulds. A holder 9, Fig. 19, for lipstick cases 8 which are retained in the holder by a cushion 42 backed by a plate 41 secured by nuts 40 is then placed on the body 21, guide pins ensuring registration so that the projecting ends of the lipsticks enter the cases. The handle 19, Fig. 8, is then operated to raise the bar 14 with the mould parts 2 which slide upwardly with the casing holder 9 thereby detaching the lipsticks from the mould parts 1. Biassed stops 43, Fig. 19, on the holder swing into vertical position at the end of the upward movement. The bar 14 is retained in raised position by a pivoted spring catch 20, Fig. 8, and when this is released the bar 14 descends, by operation of the handle 19, thereby stripping the mould parts 2 from the lipsticks and leaving the lipstick holder supported on the stops 43. The lipstick casings complete with lipsticks may then be removed from the holder. According to a modification the mould parts may be formed respectively in a central cylinder and annular member which are given similar relative axial movements.