| 摘要 |
1471560 Divided sprue runner DEMAG KUNSTSTOFFTECHNIK GmbH 3 Sept 1974 [14 Sept 1973] 38495/74 Heading B5A Apparatus for feeding synthetic material to a mould 2 comprises a mixing chamber 7 and a sprue runner 9 which is branched so that material fed from the mixing chamber is divided into at least two equal parts, the branches 16, 17 of the sprue runner leading to a common section 19 in which the divided parts of the material are recombined prior to feeding to the mould each branch of the sprue runner having at least one constriction 18 therein, with all the branches having the same number and configuration of restrictions. As shown in Fig. 3, the constriction 18 is formed at the inlet of each branch and the cross-section of the branch increases steadily downstream of the construction. The common section 19 may be bent, as shown, and constricted at the bend. In Figs. 4, 5 (not shown), two branches (22, 23) recombine at (24) and then redivide into four branches (25 ... 28), recombining at (29).
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