Verfahren und Maschine zur kontinuierlichen Bildung von fiberverstaerktem Kunstmaterial

摘要

1,217,559. Moulding fibre reinforced articles. GLASTRUSIONS Inc. 18 June, 1968 [23 June, 1967], No. 29064/68. Heading B5A. [Also in Division B8] In a process for continuously forming fibre reinforced stock 26, 27, 28, Figure 1, a multiplicity of individual fibre strands 16, Figure 2, are passed-through a composing tube 15 to which resin and a hardener are continuously supplied to impregnate the fibres which, in the form of uncured stock, then passes to a forming and curing station 23. The cured stock is cut into lengths by a movable flying cut-off saw, Each of the composing tubes 15, Figs. 6 and 7, has a mouth 66 in which is located a torpedo 70. Resin and hardener mixed in chambers 77, 78 pass into the tube through jets 68, 73, 74. In the forming and curing die 20 the stock is subject to high-frequency heating and adhesion between the stock and die is prevented by an adjacent vibrator 24 which is subject to axially directed vibrations. The movement of the fibres and cured stock is effected by a pulling mechanism comprising two reciprocable heads 37, 38 each of which comprises upper and lower blocks 90, 91, Fig. 10 interconnected by removable hinge shafts 96, 101 and the lower one of which guided in its movement by a rail 107 which is embraced by rollers 105, 106 secured to a downward extension 104 of the lower block. A chain 39 which is driven by an hydraulic motor extends between webs 110, 111 to which is pivoted a catch 54 Fig. 13, movable between two positions by an hydraulic ram 53 to couple and uncouple the chain 39 to the block 91 to effect forward movement of the heads 37, 38. The puller heads grip four separate stock elements 191, Fig. 10, between the plate 130 secured to back-up plate 131 attached by bolts 134 and spacers 132, 133 to the block 90. In the lower block 91 four dish-topped plungers 135, 136 are raised by an inflatable tube 143 to engage the stock 191 during the active movement of the puller head. Vertically adjustable guide members co-operate with the stock elements. An optical pyrometer senser detects the temperature of the stock at the exit of the forming die and through a suitable control device adjusts the speed of the chain driving hydraulic motor accordingly. A manually set speed adjusting device may be provided.