| 摘要 |
964,047. Moulding machines. UNITED STATES RUBBER CO. March 29, 1962 [May 15, 1961], No. 12043/62. Heading B5A. Moulding apparatus comprises a channel 5 mounted on a frame, a number of moulds 46a-46k, 47a-47k, which can be inserted at 48 into the channel and are slidable along it to an output end 24 where they may be withdrawn at 52. The inlet portion 22 consists of four walls (two only, 35, 36, shown) rigidly connected to each other and to a plurality of longitudinally extending angle members which are also connected to wall members 29, 30 of the outlet end 24. A heated enclosure 15 surrounds a portion of the channel 5. In operation, assuming the channel 5 has been previously loaded with mould plates 47a-47j, 46b-46k, the mould plate 46k is ejected through opening 52, and by actuation of reversing valve of the reciprocating means (Fig. 1, not shown), the plunger 41 commences a compression stroke, pushing cavity mould plate 47a to the right, and by friction causing the entire channel 5 to move until the end face 24a of the outlet portion abuts a shoulder 42a of a steel block 42 rigidly supported on support leg 4. As the movement continues, the mould plate 47j abuts steel block 42, the column being then under compression. Via the reversing valve the piston is withdrawn, and by friction and engagement of the plunger with hooks 41a the entire channel 5 is shifted, opening a gap 45. The mould plate 47j can now be removed, an imperforate mould plate 46a inserted at 48, and moulding composition 50 added via aperture 49. The plunger 41 is then moved forward again, as previously, and the moulding compound fills the cavity of cavity plate 47a, the excess compound forming a pad 56 between adjacent mould plates. Eventually after two or more cycles, the pad 56 meets an aperture in the wall of portion 22 and during a compression stroke is squeezed out of the channel and into a receptacle. As the compound is cured, expansion of the material forces out some more flesh which is sheared from the edges of the moulds by the leading edge 59 of the outlet portion 24 and drops into another receptacle. An ejection fixture 54 may be provided adjacent the moulding apparatus to remove the cured articles from the cavity mould plates. Specification 766,816 is referred to.
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