Abstract: A clamping mechanism for a clamping unit of an injection molding machine includes a drive unit which moves a first platen linearly relative to a fixed second platen and is linked to the first platen for limited movement. A force-application unit builds up a clamping force, when the first platen assumes a closing position. Disposed between the force application unit and the first platen is a locking device which transmits the clamping force and includes a screw mechanism which operates in synchronism with the drive unit and has a screw shaft and a locking nut constructed to normally connect with clearance to the screw shaft via a thread connection and to interact with the screw shaft for transmitting a load, when the clamping force is applied, whereby the threaded connection is forced to self-lock to secure the locking nut on the screw shaft and prevent reverse rotation of the locking nut.

Abstract: A backflow prevention device for a plasticizing and injection screw axially movable in a plasticizing cylinder of an injection molding machine, includes a base body having a leading head portion and a trailing neck portion and formed with a channel for passage of plastic melt by the screw to an anterior screw space, whereby a check valve is disposed in the channel. Bearing against an inner wall of the plasticizing cylinder and axially moving between open and closed positions is a locking ring so positioned behind the head portion in the area of the neck portion as to define a gap with the base body.

Abstract: A machine for making formed articles of plastic or rubber, such as an injection molding machine, extruder or blow molding machine, includes a machine control, and a plurality of electric components which are operatively connected through wireless communication to the machine control. The machine control as well as the electric components have each devices for transmitting and receiving electromagnetic waves.

Abstract: A foaming agent charging and mixing device comprises at least one mixing means and one foaming agent metering means, wherein the foaming agent charging and mixing device may be arranged between an plasticating screw and a mold.

Abstract: A pressure measuring device for an injection molding machine, includes a stroke drive mechanism operatively connected to a plasticizing unit of an injection molding machine, a force transmission member elastically deforming in response to an axial force and having one side facing the drive mechanism and another side facing the plasticizing unit. Each side of the force transmission member has at least two elevated supports, wherein the supports on one side are positioned in offset relationship to the supports of the other side. A sensor element is provided to measure a bending deformation of the force transmission member in a peripheral area thereof between two supports of the force transmission member for determining the injection pressure.

Abstract: Apparatus for casting metallic materials, includes a processing device for preparing metallic material in free-flowing form and a storage container in communication with the processing device for receiving a continuous flow of prepared metallic material. An injection unit including a piston and cylinder arrangement is arranged separately from and connected to the storage container by a flow connection which includes a flow regulating device to control a flow therethrough. The storage container and the piston and cylinder arrangement are heated separately by a heating assembly, thereby ensuring short cycle times and establishment of great variability during a casting operation.

Abstract: The invention relates to a plasticizing unit in injection-moulding machines, in particular for processing thermoplastics, with a plasticizing cylinder in which a rotatable and axially displaceable screw is arranged, at the head of which a non-return valve is provided, which has an axially displaceable barrier sleeve which encloses with radial play a tapered region which belongs to a basic body fixed in the screw head and is present between blades and a stop ring. The basic body has at least three blades, in that supporting elements provided on the surfaces of the blades facing the barrier sleeve, wherein at least the supporting surfaces of the supporting elements are made of a hard-wearing material.

Abstract: In a method and apparatus for injection molding a multi-component mixture, in particular liquid silicone rubber; a starting material, containing at least two components and, optionally, at least one additive, is conveyed from a storage and metering assembly through a mixer for mixing the starting material, to a reservoir at an amount which is a multiple of an amount required for an injection molding cycle. The mixed starting material is transferred in increments from the reservoir to an injection unit of an injection molding machine. When the reservoir is emptied to a predetermined level a multiple of the amount of starting material required for the injection molding cycle is fed to the reservoir.

Abstract: A hydraulic system includes at least two consumers, e.g., a closing unit and an injection unit of an injection molding machine. At least two displacement pumps are provided to produce a fluid flow under pressure to the consumers, whereby at least one control valve is provided for each of the consumers. At least one further valve is provided to control a fluid communication between the output sides of the displacement pumps, wherein at least one of the consumers is supplied with pressure from the outlet of the displacement pumps separately or together in groups.

Abstract: A mold closing unit for an injection molding machine or press; includes a drive mechanism, and a toggle mechanism having a first pair of linkages which are connected to one another at a first knuckle point. One linkage is connected to a stationary component at a second knuckle point and the other linkage is connected to a movable mold mounting plate at a third knuckle point. At least one of the linkages is operatively connected to the drive mechanism at a fourth knuckle point, wherein the fourth knuckle point is spaced from the first knuckle point by a first distance, and spaced from the second knuckle point by a second distance, wherein a sum of the first and second distances is greater than 1.2 times a distance between the first and second knuckle points.

Abstract: An injection assembly for an injection molding machine, with a continuously operating plasticizing unit, includes a piston-type injection unit and an arrangement for intermediate storage and discharge of melt. Several melt reservoirs with melt inlet openings are provided between the plasticizing unit and the piston-type injection unit. Melt lines that connect the melt reservoirs with each other and with the plasticizing unit extend to the melt inlet openings. The melt reservoirs include actuatable work pistons for discharging the melt, wherein the work pistons can open and close the melt inlet openings in the melt reservoirs to divert the melt flow. The disclosed injection unit increases the total volume of bufferable melt and allows individual and separate adjustment of the reservoir volumes and the discharge velocity of the individual melt reservoirs. In addition, switching valves can be eliminated since the melt flow is switched by the work pistons.

Abstract: A height adjustable keyboard support for attachment to and support from a work surface comprising two mounting brackets for attachment to a work surface. A rigid subassembly has a pair of horizontally spaced pivotting support arms rigidly connected at one end thereof by an intermediate member such that said support arms maintain the relationship therebetween. The subassembly is pivotally secured to the work surface by mounting brackets. A tiltable keyboard mounting arrangement is located generally between the support arms and is controlled by a linkage. An adjustable in length link extends between the subassembly and one of the mounting brackets and maintains the subassembly in a desired position and allows adjustment of said position by adjusting the length of the adjustable link. The link can have one end thereof secured in a slot with gravity biasing the link to one end of the slot. The slot allows the keyboard support to move upwardly if required to avoid pinning of an operator's legs therebeneath.

Abstract: A height adjustable workstation uses a torsion spring in association with a transmission for providing a counterbalance force opposing downward forces applied to the work surface. The workstation has telescoping legs and the telescopic movement thereof is transmitted through the transmission system to the torsion spring. The torsion spring is loaded and applies the counterbalance force to the legs via the transmission. The system includes a hand engaging adjustment mechanism for varying the magnitude of the counterbalance force and also includes a lock arrangement for locking the workstation at various selected positions. The preferred transmission system includes a rack and pinion gear arrangement connected to the torsion spring by a shaft.