US 5,609,890 AGranted

Molding machine for injection molding of tooth brushes

AssigneeG.B. Boucherie N.V.

InventorBart G. Boucherie

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Abstract

For injection molding of tooth brushes from two different molding material components with tufts of bristles incorporated in the head portions of the brush bodies a molding machine is proposed which includes a tuft loading station, a first injecting station associated with the first material component and a second injecting station associated with the second material component. In one or each injecting station, the stationary molding block has a recess, and a movable mold insert part fits into this recess to complete the stationary mold block. The movable mold insert part is provided with tuft insertion holes and can be transferred to the tuft feeding station where tufts of bristles are loaded into the tuft insertion holes so that they have their inner ends projecting into the mold cavity portion defined by the movable mold insert part. Production of tooth brushes is a continuous sequence of tuft loading and injecting steps.

Claims12

Dependent claims

A molding machine for injection molding of tooth brushes from at least two different molding material components, comprising at least two injecting stations each associated with a different one of said components, a first one of said injecting stations having a mold cavity with a first cavity portion having the shape of a toothbrush handle and a second cavity portion having the shape of a toothbrush head, and a second one of said injecting stations having a mold cavity corresponding in shape to requirements of the second molding material component, each of said mold cavities being defined by relatively movable mold parts, one of said mold parts of each injecting station being divided to comprise a base member with a recess and a movable mold insert part fitting into said recess and which when joined to said base member completes said one mold pan, and the machine further comprising a tuft feeding station, said movable mold insert part defining said first cavity portion and having a plurality of tuft insertion holes arranged in a pattern corresponding to the tuft pattern of tooth brushes to be produced and being movable between a tuft feeding station to receive a tuft of bristles in each tuft insertion hole so that an end thereof projects into said cavity portion, a second position joined with the base member of the one mold part in the first injecting station and a third position joined with the base member of the one mold part in the second injecting station, each of said tuft ends being embedded in molding material of the first component upon injection thereof into the cavity of the first injecting station.

Dependencies are inferred from the claim text.

Facts

Application: 08/423,093Filed 18 Apr 1995
Priority: GB 940773519 Apr 1994
Granted: 11 Mar 1997
Term ends: Not estimatedThe source records don’t support an estimate.

Classification12 codes

B29C 45/062
Mounted on a turntable , i.e. on a rotating support having a rotating axis parallel to the mould opening, closing or clamping direction: carrying…
A46D 3/005
Preparing, i.e. Manufacturing brush bodies: by moulding or casting a body around bristles or tufts of bristles
B29C 45/14385
Coating a portion of the article, e.g. the edge of the article: coating a portion of a bundle of inserts, e.g. making brushes
B29C 45/162
The materials being injected at different moulding stations: using means, e.g. mould parts, for transferring an injected part between moulding…