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US 2005/0191381 A1Published application
Injection moulding system for a material vulcanizable by heat
OwnerGiovanni Cosciainventor
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OwnerGiovanni Cosciainventor
Estimating the term…
An injection molding system for a material vulcanizable by heat comprises a mould (13, 113, 213) with molding impressions (14, 114, 214) fed from material-feeding channels (17, 19, 117, 119, 217, 219). The mould is separable into a first portion (16, 116, 216) containing first sections (17, 117, 217) of the feeding channels and a second portion (18, 118, 218) containing end sections (19, 119, 219) of the feeding channels and the molding impressions (14, 114, 214). An element (21, 121, 221) is interposed between the first and second portions of the mould after feeding of the material to the impressions and comprises first means (25, 125, 225) designed to keep the element surface (23, 123, 223) coming into contact with the first portion (16, 116, 216) to a temperature adapted to avoid vulcanization of the material in the first channel sections (17, 117, 217) and second means (26, 126, 226) for heating the opposite element surface (24, 124, 224) coming into contact with the second mould portion (18, 118, 218) to a temperature high enough to bring the material in the impressions (14, 114, 214) to a temperature suitable for vulcanization of same. Around the channels the first mould portion (16, 116, 216) extends into the second portion (18, 118, 218) so that the end sections (19, 119, 219) of the channels remaining in the second portion have a reduced length.
An injection molding system for a material vulcanizable by heat, comprising a mould with molding impressions fed from channels for feeding the material in the fluid state and means for vulcanizing the material in the impressions, the mould is separable into a first portion containing first sections of the feeding channels and a second portion containing end sections of the feeding channels and the molding impressions, the vulcanizing means comprising an element that is interposed in contact relationship between said first and second mould portions after feeding of the material to the impressions and in turn comprising means for heating the element surface coming into contact with the second mould portion to a temperature high enough to bring the material in the impressions to a temperature adapted to vulcanization of same, around the channels the first mould portion extending into the second portion so that the end sections of the channels remaining in the second portion have a reduced length, characterized in that the element comprises thermoregulating means for maintaining the element surface coming into contact with the first portion to a temperature suitable to avoid vulcanization of the material in the first channel sections.
Dependencies are inferred from the claim text.