Stack mould assembly
AssigneeGlaxoSmithKline Consumer Healthcare GmbH & Co. KG
InventorWolf-Dieter Mueller
Life of this patent
Estimating the term…
Abstract
An injection moulding process for making a toothbrush involving a stack mould assembly of at least three mould blocks (1, 2, 3, 4) arranged for use along a longitudinal stack axis (A—A), with two end mould blocks (3, 4), and an intermediate mould block (1, 2), with part mould cavities (11A, 21, 31, 41, 51) in the blocks. Plastic toothbrush skeletons are made in a cavity (11A, 21, 31) between the intermediate block (1, 2) and one end block (3), then elastomer parts are made in a cavity (41, 51) between the intermediate block (1, 2) and the other end block (4). Preferably the intermediate block (1) rotates so its part cavity (11A) faces the other end block (4). Stack mould assemblies (1, 2, 3, 4) for this process are provided. The assembly (1, 2, 3, 4) provides a compact mould with high output.
Claims9
A stack mould assembly (1, 2, 3, 4) comprising;
- a first mould block (1) having at least two first part mould cavities (11A) therein for forming part of a toothbrush head therein, at least one such first part mould cavity (11A) being respectively in each of two opposite-facing surfaces (1A, 1B) of the first mould block (1);
- a second mould block (2) having at least one second part mould cavity (21) therein for forming part of a toothbrush handle therein, the first (11A) and second (21) part mould cavities capable of mating together to form a part mould cavity (11A, 21) defining part of the head and handle of a toothbrush to be formed therein;
- a third mould block (3) having at least one third part mould cavity (31) therein for forming part of a toothbrush therein, the third part mould cavity (31) capable of mating together with the first and second part mould cavities (11A, 21) to form a part mould cavity (11A, 21, 31) defining part of the head and handle of a toothbrush to be formed therein;
- a fourth mould block (4) having at least one fourth part mould cavity (41) therein for forming part of a toothbrush, the fourth part mould cavity (41) and first part mould cavity (11A) being capable of mating together to form a part mould cavity (11A, 41) defining part of the head and handle of a toothbrush to be formed therein;
- the said first (1), second (2), third (3) and fourth (4) mould blocks being arranged in a stack mould assembly such that the first (1) and second (2) mould blocks are intermediate in a stack between the said third (3) and fourth (4) mould blocks;
- a fifth part mould cavity (51) being provided in a mould block (2), the fifth part mould cavity (51) capable of mating together with the first and fourth part mould cavities (11A, 41) to form a part mould cavity (41, 51) defining part of the head and handle of a toothbrush to be formed therein.
Dependencies are inferred from the claim text.