Abstract:
The invention relates to an injection molding device for plastic materials, wherein the locking pressure acting on the divided mold (1) is transmitted by a plate (2′) that is traversed by cantilevers (3) supported on the outer side of the plate (2′). Preferably, the support comprises a jacket (7) having unequal peripheral wall thickness or height.
Abstract:
An injection moulding machine has a framework (1), a fixed and a movable die platen (2, 8) and at least a piston-cylinder unit of a cylinder platen (3) that bears a hydraulic or electromechanical closure mechanism. The cylinder platen (3) and the fixed die platen (2) are interconnected only by the framework (1). The closure force exerted during injection moulding and the vertical thrust between the cylinder platen (3) and the die platen (2) are transmitted only through the framework (1). The intersection between the longitudinal center axis (LSK) of the closing die (5) and the longitudinal center axis (LBF) of the die platen (8) lies at the back of the movable die platen (8) and the point at which the force of the closing die (5) is transmitted to the movable die platen (8) is vertically displaceable in relation to the die platen (8).
Abstract:
Device for injection moulding of plastics has one stationary and one moveable die platen, and a mechanism for producing a closing force between the half moulds carried by the die platens. The closing force is introduced exclusively into selected areas (19) of a supporting frame adjacent longitudinal spars and spaced apart from one another, and the ends of the spars (6) are connected by tension bars (11).
Abstract:
An injection molding machine has a frame which is C-shaped viewed from the side, the legs of which are pushed apart at their free ends by the effect of the locking force, wherein the two die platens associated with the legs are thereby kept parallel, in that pivoting takes place between at least one die platen and the associated leg. According to the invention, a measuring device is provided for permanent monitoring of the rotation and distortion of the joint providing the pivoting.
Abstract:
An injection molding apparatus includes stationary and movable die carrier plates. The movable die carrier plate can be moved in a direction toward the stationary die carrier plate during a quick stroke and can be pressed toward the stationary die carrier plate during a power stroke. An electric motor has an output. A member is connected between the output and the movable die carrier plate to transmit movement of the output to the movable die carrier plate to move the movable die carrier plate during the quick stroke. A force setting device is responsive to a force acting between the output and the movable die carrier plate to interrupt transmission of movement of the output to the movable die carrier plate at a changeover between the quick stroke and the power stroke when the force exceeds a predetermined value. Thereafter, further movement of the output to press the movable die carrier plate toward the stationary die carrier plate during the power stroke is achieved by a power transmitting device connected between the output and the movable die carrier plate.
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.
Abstract:
An injection moulding machine having a machine frame (1), a stationary and a movable mould mounting plate (2,8) for fixing mould portions (4,9) and an injection unit (5) which opens into the mould through the stationary mould mounting plate (2), wherein the force applied by the closing mechanism is transmitted through the machine frame instead of through bar members and the injection unit (5) is in rigid connection with the stationary mould mounting plate (2).
Abstract:
A process for producing a coating on the surface of a plastifier screw for injection molding machines includes applying to a hard-metallic or ceramic substrate with low distortion, a steel screw base element, by high-speed flame spraying. During the coating process, a spray jet treats the different surface regions of the screw base element including the flanks and top of a rib as well as the base of the screw, independently.
Abstract:
Apparatus for the injection molding of plastic material into a mold formed from two mold halves (8, 9), wherein one mold half (9) is arranged on a movable mold mounting plate (7) and the piston rod (1) applying the closing pressure to that mold mounting plate (7) takes part in the movement of the mold mounting plate (7) and in so doing slides with its outside against the inner seal (17) of a stationary cylinder tube (3), wherein the cast piston rod (1) is provided in the region which comes into contact with the seal (2) of the cylinder tube (3) with a hard coating of another material.