Stack mould assembly
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United States of America Patent
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Sep 19, 2006
Grant Date -
Jan 22, 2004
app pub date -
Aug 13, 2001
filing date -
Aug 16, 2000
priority date (Note) -
Expired
status (Latency Note)
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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.
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