Krauss-Maffei Kunststofftechnik Gmbh

Krauss-Maffei Aktiengesellschaft

Bolta-Werke Gmbh

Peter Lichtinger

Martin Eichlseder

Peter Brams

Jürgen Hackert

Gabrial Ringelstetter

Timo Günzel

Günter Prautzsch

Wilhelm Pfister

Peter Ils

Jürgen Schreyer

A horizontal injection molding machine includes a machine bed defining a longitudinal axis and two mold platens supported on the machine bed for movement in a direction of the longitudinal axis, whereby each of the mold platens carries a half-mold. Further provided is a turning device which carries at least two half-molds for interaction with the half-molds on the mold platens, and includes a base plate, which is fixedly mounted to the machine bed between the mold platens, a turntable, and a bearing unit supporting the turntable on the base plate on one side for rotation about a vertical axis. The half-molds of the turning device are hereby attachable on a base-plate distal side of the turntable. The mold platens are moved by a drive mechanism in relation to the turning device, and tie bars extend between the mold platens and are constructed to resist a clamping force.

Horizontal injection molding machine with turning device

A rotary device for a horizontal injection molding machine includes a base and a rotary table supported on the base for rotation about a vertical rotation axis upon operation of a drive. The drive includes a shaft extending downwards from the rotary table and projecting through the base.

Rotary device for a horizontal injection molding machine

A rotary device for a horizontal injection molding machine includes a base plate and a rotary table supported on the base plate for rotation about a vertical rotation axis upon operation of a drive. The drive includes a pivot pin extending downwards from the rotary table and projecting through the base plate.

In a method of making plastic articles with embossed pattern, a plastic material is injection-molded in a cavity of a clamping unit of an injection molding machine to form an injection-molded plastic article. A pattern is embossed from a foil strip onto a previously injection-molded plastic article to form a finished plastic product with embossed pattern, whereby the embossing step is decoupled from the injection molding step and carried out separately from a clamping step of the clamping unit.

Apparatus for making plastic articles having an embossed pattern

A rotary device ( ) for a horizontal injection molding machine for rotating mold portions or molded articles, disposed between the mold mounting plates, about a vertical axis. The invention is further characterized in that the rotary device ( ) is supported completely separated from the tie bars ( ) exclusively on the machine bed ( ). The rotary device ( ) includes hereby a base plate ) supported on the machine bed, a rotary table ( ) supported on the base plate for rotation about a vertical axis, as well as drive means for turning the rotary table. The base plate ( ) has a substantially H-shaped configuration, with the lateral legs ( ) of the H resting on the machine bed ( ). Turning is realized by gear ( ) driven by an electric motor or hydraulic motor ( ) and meshing in a ring gear ( ) on the rotary table ( ). The rotary table ( ) is mounted on a pivot pin ( ) which extends through the base plate ( ) and is rotatably supported in addition by a stator ( ) arranged below the base plate.

A rotary device for a horizontal injection molding machine is disposed between a movable mold mounting plate and a fixed mold mounting plate of the injection molding machine and includes a base plate and a turntable, which is supported on the base plate for rotation about a vertical rotation axis and supports a swivel plate for interaction with the moveable and fixed mold mounting plates. The rotary device further includes an eccentric structure for displacement of the turnable in horizontal direction to thereby enable a precise position of the swivel plate between the moveable and fixed mold mounting plates.

Adjustable rotary device for a horizontal injection molding machine

The invention relates to a process for manufacturing a thermoplastic part ( ) with an injected seal ( ) as well as to an injection molding apparatus and a corresponding thermoplastic part. For injecting the seal, a groove ( ) is formed during molding of the thermoplastic part ( ) in which groove liquid crosslinked plastic as material for the seal ( ) is injected. Sealing projections ( ) are formed on the groove edge and/or on the injection mold in order to prevent an overflowing beyond the groove edges during injection. When closing the mold, undercuts ( ) are formed on the upper edge of the groove for holding the solidified seal ( ) in the groove.

Method and apparatus for forming a thermoplastic part with injected elastomer seal

A method of producing molded parts from several components in plastics processing machines is described, whereby for each component plasticized plastic material is injected into cavities formed by two mold halves, and whereby a sprue element ( ) is provided at least for the first component ( ). The sprue element of at least the first component remains on the molded part and is molded around, entirely or partially, by the next component during one of the following working cycles. This saves additional working steps for the removal of the sprue and prevents possible impurities of the environment, especially in the case of brittle material,

Method for connecting several plastic components through injection molding around the sprue

The invention relates to a device for receiving and transporting molded parts in order to especially permit the removal of plastic molded parts produced in injection molding machines from the cavities, and to permit the transport of the molded parts through a number of work stations, without the use of separate handling systems. According to the invention, circulating transfer frames are provided from which retaining elements project and reach into the cavity to closely abut the mold. The molded part is bonded to the retaining element during injection molding of the molded part and is thus fixed in the transfer frame for transport to additional work stations. The molded part is removed from the retaining elements at the end of the transport line. In a modification, the molded part is molded directly or via intermediate pieces onto a circulating rope or a chain conveyor, or on rods mounted on a rope.

Device for receiving and conveying molded parts

A molding apparatus includes a core (,) and a female mold member (,) as well as wraparound peripheral dies (,), which are attached to the core for movement in a closing direction and completely surround the core (,). In the region of the impact areas of the peripheral dies (,) upon the female mold member (,), the impacting surfaces are configured complementary, for example planar. Each peripheral die (,) is attached laterally to the core by at least one spacer and retaining element (,), with the spacer element (,) having a width which is slightly greater than a cross section of the peripheral die, so that a small gap (,) is formed between confronting surfaces of the peripheral dies and the core. The fixed tolerance gap offers the advantage that constant, minimum frictional conditions exist. The lateral attachment facilitates the replacement of individual peripheral dies (,) and temperature-based dimensional changes of the core (,) are followed by the peripheral dies, without risk of jamming.

Molding apparatus having an improved fastening means of the peripheral dies to the core

After a thermoplastic synthetic resin has been injection molded onto a transfer plate in a thermoplastic injection mold, the transfer plate is shifted into a silicone injection mold maintained at a high temperature and a silicone member is injection molded onto the thermoplastic member. The heat transfer to the thermoplastic body is minimized by, for example, providing insulating material between heated portions of the mold system and other portions thereof and/or by maintaining air gaps from which the silicone is excluded between the thermoplastic member and heated portions of the silicone injection mold.

Apparatus for making a composite thermoplastic and silicone article

An injection-molding assembly has a fixed mold plate carrying a centering ring, a fixed mold half carrying a centering ring snugly interfitted with the fixed-plate centering ring, a movable mold plate carrying a centering ring, and a movable mold half carrying a centering ring snugly interfitted with the movable-plate centering ring. One of the rings is formed of an outer ring part having a substantially circular outer periphery and a substantially circular inner periphery and of an inner ring part having a substantially circular outer periphery and a Substantially circular inner periphery. The outer periphery of one of the ring parts has a center of curvature offset radially from a center of curvature of the respective inner periphery. The annular parts can be angularly displaced and can be clamped relative to each other.

Mold centering system for injection-molding machine

An optical disk having a pair of axially oppositely directed faces and an annular outer periphery is made by first forming a mold cavity corresponding to the shape of the disk between a pair of axially spaced parts and a demolding ring sandwiched between the parts. The cavity is then filled with a hardenable resin such that the parts form the respective faces and an inner periphery of the ring forms the outer periphery of the disk and the resin is at least partially hardened in the cavity. The parts are then axially oppositely separated from each other and from the disk to leave the disk in the ring with both of its faces exposed and the ring is then transversely displaced with the disk engaged in it out from between the mold parts. The disk is then cooled and shrunk such that its outer periphery separates from the inner periphery of the ring and the disk separates from the ring.

Making a data-carrying optical disk

Apparatus for making a data-carrying optical disk

A bushing for the axial retention and radial centering of a matrix in an injection mold for producing information carriers such as CD's is formed on the underside of its retention shoulder with channels for carrying away the air which tends to be compressed along the outer edge of the shoulder, thereby eliminating streaks or so called schlieren in the information-carrier disk which is produced.

Growing community of inventors

Fürstenfeldbruck, Germany

Peter Lichtinger