| 摘要 |
Plugs (20) that can be removed and that are made in two parts are used to close off channel sections in a hot-channel distributor (10); these are arranged so as to subtend an acute angle .alpha. with the principal axis (A) of a channel (15) that can be charged with a plastified mass. A continuous sealing edge of the face surface (30) of these is pressed onto a continuous annular surface (40) that encloses an opening (42) to the channel (15). The angle .alpha. lies between 40.degree. to 45.degree.. The plug (20) incorporates a pressure piece (26) that is located in front of a screw body (22) that can be screwed into an inclined bore (16) that opens out into area of the channel in the distributor (10) that is to be sealed off. At the sealing edge (31), the face surface (30) of the plug is flat, although it can be concavely curved inward or be crowned (32), much like a segment of a sphere, the diameter of which is defined by the diameter of the smallest radius of the sealing edge (31). The outer annular surface (40), which is circularly restricted, can be arranged on an elbow (38) at which the channel (15) makes the transition to become a branch of the distributor (10). In a through channel (15) with a series of branches (34) selected sections (36)--the ends of which have annular surface (40) that are inclined opposite to each other--can be closed off by the associated plugs (20).
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