Two step moulding teat cleaner
AssigneeDeLaval Holding AB
InventorFrank ADRIANSSON
Life of this patent
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Abstract
A method and teat cleaner for producing, by injection moulding, a teat cleaner of a teat cleaning cup that includes an inner body forming a central cavity for enclosing a teat, an exterior part, and channels therebetween for injection moulding the inner body in a first tool having a core, sliders that each include a protrusion for forming an aperture in the inner body, and channel walls, and an outer casting mould; separating the inner body from the first tool; placing the inner body in a second tool that includes a casting mould and rods; inserting the rods for forming the channels; fixating the rods; and injection moulding the exterior part in the second tool; separating the second tool from the fused teat cleaner; and removing the rods.
Claims21
A method (700) for producing a teat cleaner (500) of a teat cleaning cup (130), which teat cleaner (500) comprises an inner body (270) forming a central cavity (280) configured to enclose a teat (120) of an udder (110), wherein the inner body (270) comprises an inner surface (271) facing the central cavity (280) and an outer surface (272), and an exterior part (220) enclosing the inner body (270), and a set of channels (290) situated between the inner body (270) and the exterior part (220), the method (700) comprising steps of:
- injection moulding (701) the inner body (270) in a first tool (300), the first tool comprising:
- a core (310) for forming the central cavity (280) of the inner body (270);
- a set of sliders (320), each slider (320) comprising at least one protrusion (340) for forming an aperture (275) in the inner body (270), extending from the outer surface (272) of the inner body (270) to the inner surface (271) of the inner body (270), and channel walls (330) extending along the length of the inner body (270);
- and
- an outer casting mould (350), for forming the outer surface (272) of the inner body (270);
- after injection moulding (701) the inner body (270) in the first tool (300), separating (702) the inner body (270) from the first tool (300);
- placing (703) the inner body (270) in a second tool (400) comprising a casting mould (420) and a set of rods (410);
- inserting (704) the set of rods (410) for forming the set of channels (290), between at least some of the channel walls (330) of the inner body (270);
- fixating (705) the inserted (704) set of rods (410);
- injection moulding (706) the exterior part (220) in the second tool (400), thereby fusing the exterior part (220) with the inner body (270) for forming a fused teat cleaner (500);
- separating (707) the second tool (400) from the fused teat cleaner (500);
- and
- removing (708) the fixated (705) set of rods (410) from the set of channels (290) of the teat cleaner (500).
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Dependencies are inferred from the claim text.