Injection molding machine having tiltable mounting plates

Abstract

In an injection molding machine having a machine frame, a stationary mold mounting plate, a movable mold mounting plate and a support portion on the machine frame, which carries a mold closing mechanism, the support portion and the stationary mold mounting plate are connected exclusively by way of the machine frame. The closing force which occurs during the closing phase and the expansion force which occurs during injection, as between the support portion and the stationary mold mounting plate, are carried only by way of the machine frame. The mold mounting plates are mounted tiltably about a respective horizontal axis while a guide means is provided between the two mold mounting plates or the movable mold mounting plate and the machine frame.

What is claimed is: 
     
       1. An injection molding machine comprising a machine frame, a stationary and a movable mold mounting plate, a cylinder plate carrying a closing mechanism for exerting a closing force during a closing phase and for resisting an expansion force during an injection phase of the molding machine, wherein the cylinder plate against which the movable mold mounting plate is supported and the stationary mold mounting plate are connected without bars exclusively by way of the machine frame so that the closing force which occurs during the closing phase and the expansion force which occurs during the injection phase as between the cylinder plate and the mold mounting plate are passed only by way of the machine frame, means for mounting at least one of said mold mounting plates tiltably about a horizontal axis, and a guide between the movable mold mounting plate and the machine frame, the guide including a guide rail mounted to the machine frame and at least one slide shoe carried on the movable mold mounting plate and slidable on the guide rail, and further including in the guide at least one spring permitting resilient tilting movement of the movable mold mounting plate. 
     
     
       2. A machine as set forth in claim 1 wherein said spring is disposed between said slide shoe and said movable mold mounting plate. 
     
     
       3. A machine as set forth in claim 1 wherein said guide rail is located on the machine frame by way of at least one additional spring. 
     
     
       4. A machine as set forth in claim 1 wherein said spring is a plate spring. 
     
     
       5. A machine as set forth in claim 1 wherein said closing mechanism includes a piston-cylinder unit and further including a pivot means pivotally connecting the cylinder of said unit to the machine frame. 
     
     
       6. A machine as set forth in claim 1 wherein said closing mechanism is a hydraulic assembly. 
     
     
       7. A machine as set forth in claim 1 wherein said closing mechanism is an electromechanical assembly. 
     
     
       8. A machine as set forth in claim 1 wherein said closing mechanism is a hydraulic-mechanical assembly. 
     
     
       9. An injection molding machine comprising a machine frame, a stationary and a movable mold mounting plate, a cylinder plate carrying a closing mechanism for exerting a closing force during a closing phase and for resisting an expansion force during an injection phase of the molding machine, wherein the cylinder plate against which the movable mold mounting plate is supported and the stationary mold mounting plate are connected without bars exclusively by way of the machine frame so that the closing force which occurs during the closing phase and the expansion force which occurs during the injection phase as between the cylinder plate and the mold mounting plate are passed only by way of the machine frame, means for mounting both mold mounting plates tiltably about a horizontal axis, and a guide between the two mold mounting plates, the guide including a guide rail mounted on said stationary mold mounting plate, and at least one slide shoe carried on the movable mold mounting plate and guided on the guide rail, the slide shoe positively embracing the guide rail in such a way that lifting of the shoe from the guide rail is prevented. .Iadd. 
     
     
       10.  An injection molding machine comprising a machine frame, a stationary and a movable mold mounting plate, a closing mechanism for moving the movable mold mounting plate relative to the stationary mold mounting plate, the closing mechanism and the stationary mold mounting plate being connected to each other by the machine frame, means for mounting at least one of said mold mounting plates tiltably about a horizontal axis, and guide means for guiding the movable mold mounting plate during movement of the movable mold mounting plate, said guide means including a guide rigidly mounted to one of said mold mounting plates, the other of said mold mounting plates being slidably engaged with said guide for sliding with respect to said guide during movement of the movable mold mounting plate..Iaddend..Iadd. 
     
     
       11.  The machine of claim 10, wherein said other mold mounting plate has a slide shoe, slidably guided on said guide..Iaddend..Iadd.12. The machine of claim 10, wherein said guide is a guide rail rigidly mounted to the stationary mold mounting plate..Iaddend..Iadd.13. The machine of claim 11, wherein said guide is a guide rail rigidly mounted to the stationary mold mounting plate..Iaddend.