US 5,531,581 A · Ajustable injection molding apparatus

(A) a frame;

(B) a cylinder integrally formed with respect to said frame and defining a cylinder bore extending therethrough, said cylinder defining a first end opening and a second end opening within said cylinder bore with said first end opening and said second end opening being spatially disposed from one another, said cylinder bore being axially aligned with respect to said first end opening and said second end opening and positioned therebetween;

(C) a cylinder rod means movable with respect to said cylinder and extending through said cylinder bore thereof and through said first end opening thereof and said second end opening, said cylinder rod means further comprising a bumper means thereon located outside of said cylinder bore adjacent said first end opening;

(D) a nozzle rod means attached to said cylinder rod means and extending outwardly away therefrom and being movable therewith;

(E) a nozzle body attached with respect to said frame to be adjustably secured thereto, said nozzle body defining a nozzle channel means therethrough, said nozzle body further defining a tip opening means therein in fluid flow communication with respect to said nozzle channel means, said nozzle rod means being movably mounted within said nozzle channel means for selectively allowing dispensing therethrough, said nozzle rod means being selectively positionable with respect to said tip opening means to prevent dispensing therefrom when positioned therein;

(F) a piston means fixedly secured to said cylinder rod means at a position within said cylinder bore, said piston means being reciprocally movable within said cylinder bore between a position adjacent said first end opening with said nozzle rod means opened with respect to said tip opening means and a position adjacent said second end opening with said nozzle rod means closed with respect to said tip opening means, said piston means being larger than said first end opening and larger than said second end opening to facilitate retainment of said piston means within said cylinder bore during reciprocating movement thereof;

(G) a housing fixedly secured to said frame and defining a housing bore extending therethrough, said housing including housing female thread means defined within said housing bore, said housing defining an alignment slot means therein extending parallel to said cylinder rod means;

(H) a block movably mounted within said housing bore of said housing adjacent said alignment slot means, said block defining an adjustment bore extending therethrough;

(I) a resilient biasing means comprising a resilient spring means positioned within said housing bore between said block and said housing and being operative to urge said block away from said housing;

(J) an adjustment shaft means extending through said adjustment bore and being adjustably movably secured therewithin, said adjustment shaft means including shaft male thread means thereon positioned in engagement with respect to said block female thread means to facilitate adjustable engagement between said adjustment shaft means and said block, said adjustment shaft means including an adjustment head means thereon to facilitate gripping thereof and to facilitate adjustment in positioning of said adjustment shaft means with respect to said block and to facilitate adjustment in spacing between said adjustment shaft means and said bumper means on said cylinder rod means;

(K) a first limit switch fixedly secured to said frame at a position adjacent said housing, said first limit switch being adapted to be activated to indicate movement of said nozzle rod means to a fully opened position with respect to said tip opening means;

(L) a first flag arm means secured to said block to be movable therewith and extending outwardly therefrom through said alignment slot means in order to maintain axial alignment between said housing and said block, said first flag arm means being movable with said block to a position adjacent said first limit switch for activating thereof responsive to movement of said nozzle rod means to the fully opened position relative to said tip opening means;

(M) a second limit switch fixedly secured to said frame at a position adjacent said bumper means, said second limit switch being adapted to be activated to indicate movement of said nozzle rod means to the fully closed position with respect to said tip opening means;

(N) a second flag arm means attached to said cylinder rod means adjacent said bumper means to be movable therewith, said second flag arm means being movable with said cylinder rod means to a position adjacent to said second limit switch for activating thereof responsive to movement of said nozzle rod means to the fully closed position relative to said tip opening means;

(O) a stop head means positioned on said adjustment shaft means oppositely from said adjustment head and being spatially disposed from said bumper means of said cylinder rod means, said stop head being adapted to be abutted by said bumper means of said cylinder rod means responsive to movement of said nozzle rod means toward the opened position to urge said block to move toward said housing to compress said resilient biasing means and cause said first flag arm to activate said first limit switch to indicate said nozzle rod means being at the fully opened position;

and

(P) a manifold means fixedly secured to said frame and defining a manifold channel means extending therethrough, said manifold defining a poppet seat means therearound within said manifold channel means;

and

(Q) a poppet means attached with respect to said cylinder rod means and said nozzle rod means for interconnection therebetween, said poppet means being selectively movable during an injection stroke with said cylinder rod means and said nozzle rod means to be engageable with respect to said poppet seat means responsive to said nozzle rod means being positioned extending into said tip opening to prevent material flow therethrough.

Ajustable injection molding apparatus

Life of this patent

Ajustable injection molding apparatus

Life of this patent

Abstract

Claims19