发明名称 |
Injection system having skirt walls forming an annular seal walls |
摘要 |
An injection system, in an apparatus for injection-molding plastics, comprises a manifold plate (2) having an injection nozzle (3) closed by a valve stem (7) commanded by a dual-effect pneumatic linear actuator (8, 9) wherein a piston cylinder (8) is compressed between a back plate (10) and a hot runner manifold (5). The piston cylinder bounds an annular gap into which the compressed air that drives the actuator can flow. |
申请公布号 |
US8985998(B2) |
申请公布日期 |
2015.03.24 |
申请号 |
US201113703454 |
申请日期 |
2011.06.16 |
申请人 |
Sacmi Cooperativa Meccanici Imola Societa' Cooperativa |
发明人 |
Ravagnani Andrea;Allegri Giovanni |
分类号 |
B29C45/23;B29C45/20;B29C45/28 |
主分类号 |
B29C45/23 |
代理机构 |
Laubscher, Spendlove & Laubscher, P.C. |
代理人 |
Laubscher, Spendlove & Laubscher, P.C. |
主权项 |
1. Injection system comprising:
a manifold plate having at least one nozzle configured for injecting a flow of molten material in a mould cavity; a hot runner manifold configured for supplying said nozzle with the flow of molten material, wherein said nozzle is compressed between said manifold and said manifold plate; a valve stem for controlling the flow of molten material through said nozzle, wherein at least one part of said valve stem passes through said manifold; an actuator having a piston cylinder and a piston that is slidable in a sealed manner within said piston cylinder to open and close said valve stem; and a back plate, wherein said piston cylinder is compressed between said back plate and said manifold, whereby a compression load is transmitted between said back plate and said manifold through said piston cylinder so as to close at least one seal zone for an operating fluid of said actuator;wherein said injection system comprises a first skirt wall connected to said piston cylinder and a second skirt wall connected to said manifold, said first and second skirt walls being coupled together to allow mutual axial sliding movement of said skirt walls along an annular seal zone in a direction parallel to said valve stem. |
地址 |
IT |