Frame cavity cover plate for injection molding system

#1. Field of the Invention

#The present invention is for an improvement in an injection molding assembly and, more particularly, to an ejector housing cover plate for an injection mold system to prevent dust, water and other foreign materials from affecting operation of the system.

#2. Description of the prior Art

#FIG. 1 is a perspective view of a conventional injection mold system to which the present invention relates and on which the present invention is used;

#FIG. 2 is a perspective and exploded view of the a mold stationary lower away from which the ejector housing cover plate of the present invention has been alignably displaced;

#FIG. 3 is a partial plan and fragmentary view of one corner of the cover plate of the present invention showing the positioning of the securing material used to hold the cover plate in an overlapping relationship with the ejector housing; and

#Referring now to the drawings and particularly to FIG. 1, a conventional injection mold system shown generally as 10 having an ejector housing 12 which includes a bottom 14 and sides 16, 18. A movable lower support member 20 forms a top for frame 12 and fixedly supports a lower movable cavity core 22. An upper moveable support member 24 is secured to an upper cavity core 26. These move together upwardly and downwardly during the molding operation.

#A platen 28 is moveably positioned within the opening 30 formed with frame 12. Strain rods and other cooperating structure (not shown) provide a track for movement of upper support member 24 and upper cavity core 26 toward and away from lower support member 22 and lower cavity core 22. An ejecting device 32 is formed from a plurality of individual moveable levers 34 the lower ends of which connect to platen 28. Levers 34 extend upwardly through opening 30, platen 24 and mold cavity core 22. FIG. 2 illustrates upper ends 36 of ejecting device 32 flush with the upper surface 38 of cavity core 22, the upper cavity core 26 and upper support member 24 removed from the drawing.

#The solution to the unwanted material accumulation problem in opening 30 is the provision of an ejector housing cover plate shown generally as 40. Plate 40 has a generally rectangular configuration sufficient in size to provide overlapping closure of the front and back frame openings. The placement of plate 40 over frame opening 30 is shown in FIG. 2.