| 摘要 |
<p>A no-regulation flow restrictor for a gas valve of lighter and a dedicated processing mould are disclosed. Said no-regulation flow restrictor includes a gas filter film (1) and a seal gasket (2) adhered to one side or two sides of the gas filter film (1). The seal gasket (2) is made of resilient microporous material permeable to air. It features that the gas filter film (1) and the seal gasket (2) are fused integrally together in their edges, and the seal gasket (2) has the same material as the gas filter film (1) or has material fused with the gas filter film (1). The dedicated processing mould includes a concave mould assembly with a punching-shear cavity (7) and an upper mould assembly with a punch head (9). The punch head (9) is larger than the punching-shear cavity (7) in section, and its front end surface is smaller than the section of the punching-shear cavity. The front end surface and side surface of the punch head (9) is transiting from an inclined surface or a cambered surface, where the section is the same as the punching-shear cavity in shape. A resilient layer (11) is provided at the end of the punch head (9), and via the resilient layer (11) a mould pressure is applied on the punch head (9).</p> |
