INJECTION MOULD FOR PRODUCTION OF AUTOMOTIVE TIRE FROM ELASTIC POLYURETHANE WITH ELASTIC DEFORMABLE SPOKES Russian patent published in 2011 - IPC B29C33/44 B29C43/36 B29D30/66 B22D17/20 

FIELD: process engineering.

SUBSTANCE: invention relates to machine building, particularly, to production of polyurethane tires with elastic deformable spokes. Mould elements used to produce elastic deformable spoke lateral surface are hollow that allows attaching elements to make shaped holes in said spokes and withdrawing them after filling mould cavity with polyurethane. Face covers feature diametre that allows replacing outer ring by larger-diametre ring in tread moulding. Wheel metal rim 1, and element of mould, and ring 6 are pressed between bottom 7 and top 8 covers by studs or bolts. Split joint allows withdrawing mould elements after filling it with polyurethane and its polymerisation. Inner shaping elements 9, 10 and 11 may be made from whatever hard material, including polyurethane. Prior to fitting into mould, wheel metal rim is subjected to machining consisting in increasing roughness of its outer surface to be jointed to tire inner rim. Tire tread is formed after polyurethane polymerisation in the mould made up of covers 7 and 8, inner element 9, 10 and 11, metal rim 1 and ring 6. Note here that ring 6 of the mould is replaced by larger-diametre ring to produce the tread. Then cavity formed by covers 7 and 8, tire outer ring and mould ring, is filled by the mix consisting elastic polyurethane components and high-adhesion powder.

EFFECT: producing elastic deformable complex-shape spokes, reduced labor input and ease of manufacture.

2 dwg