An injection molding method for a molded item uses a polyether ether ketone (PEEK) material, wherein a filling peak pressure is 40 MPa to 150 MPa. The PEEK material may be injected to form the molded item from a runner member through a multipoint gate and then optionally a subrunner. The runner member and the subrunner may be connected to each other by a film gate. A stretching processing may be applied after the PEEK material is injected to increase a length 1.2 to 5 fold and increase a diameter to 0.2 mm to 1.0 mm. The stretching processing may use an in-mold stretching method.

The invention relates to a method for producing leaf springs from a fiber composite material, for which a plurality of layers of fibers soaked or impregnated with synthetic resin in order to build up a not yet hardened unfinished leaf. The unfinished leaf spring is arranged in a compression mold, and the unfinished leaf spring is hardened under the influence of a predetermined pressing force and temperature curve over time to give a finished leaf spring. In order to reduce production costs, according to the invention a plurality of unfinished leaf springs are arranged vertically one above the other in the compression mold and the unfinished leaf springs are simultaneously hardened in the compression mold to give leaf springs.

Leaf spring comprising at least one leaf of composite material that comprises: a central body (1), and two eyes (2), wherein the central body (1) comprises its longitudinal end zones (1.1) embedded in a cavity (2.1) of the eyes (2), wherein the sections transversal to the longitudinal direction of the central body (1) of the longitudinal end zones (1.1) of the central body (1) and the cavities (2.1) of the eyes (2) present increasing dimensions towards the longitudinal end of the leaf spring and that comprises fibre fabrics (7, 8, 9) of the central body (1) stacked in a Z-direction perpendicular to the longitudinal direction of the central body (1) and to the longitudinal direction of the hole (3) of the eyes (2) and comprises fibre fabrics (10, 11) of the eyes (2) stacked in a parallel direction to the longitudinal direction of the longitudinal axis of the hole (3).

A urethane bumper spring is produced from a urethane raw material containing a polyester-based polyol as a polyol component and diphenylmethane diisocyanate as an isocyanate component, and includes: a skin layer; and a core portion, in which the skin layer has a density (Da) and a foamed cell diameter (Ra), and the core portion has a density (Db) and a foamed cell diameter (Rb). The density (Da), the foamed cell diameter (Ra), the density (Db), and the foamed cell diameter (Rb) satisfy relationships shown in the following expressions: 1.0Da/Db<1.34 (1) and 0.53<Ra/Rb1.0 (2). Accordingly, the urethane bumper spring can achieve a cost reduction while having durability and settling resistance under high load and high deformation.

A dust cover is configured to cover an outer side of a damper extending in a predetermined direction. The dust cover includes bellows portions and a flange portion. The bellows portions are inclined alternately toward a radially outer side and a radially inner side in an axial direction. The flange portion extends radially outward from a cylindrical portion of the dust cover. The flange portion protrudes radially outward from the cylindrical portion of the dust cover by a dimension larger than a height dimension in a radial direction between a radially inner end and a radially outer end of each of the bellows portions. A thickness of the flange portion is larger than a thickness of the radially outer end of each of the bellows portions.

The present invention relates to a method for the production of a fiber composite part, with a fibrous blank (6) being inserted into a mold (1) and the mold (1) being closed, and a matrix being injected into the closed mold (1), which is characterized in that at least sectionally an intermediate fibrous layer (15) is arranged locally fixed between the outer shell surface (7) of the fibrous material blank (6) and the inner shell surface (5) of the mold (1), so that the flow rate of the resin is reduced due to the randomly arranged fibers (15).

An insert to a mold for a leaf spring comprises a substrate and a hole that extends through the substrate, A post protrudes from the substrate such that the insert, may be coupled to the mold. Further, the post covers the hole on a first end, so the hole is not exposed. On the other end of the hole, a thin overlay that covers the hole. Thus, during a process where resin is added to the mold, no resin enters the hole. The insert, when added to a leaf spring, offers reinforcement on areas where there is high stress. Therefore, holes may be added to a leaf spring at areas of high stress without overly weakening the leaf spring.

The present invention relates to a method and an assembly for manufacturing a leaf spring from a fiber-composite material. To this end, tape material from a fiber material, which has been pre-impregnated with a matrix resin, for manufacturing a semi-finished leaf spring is wound under tension onto a winding core, wherein at least two cavities for shaping are configured on the winding core. The tape material here is pressed on by way of a contact pressure means, such that adjacent layers of the fiber material are adhesively interconnected and air pockets are removed. The semi-finished leaf spring under impingement by pressure and heat and under curing of the matrix resin is finally processed to form a leaf spring.

The disclosure relates to a bearing shoe for mounting a leaf spring end of a leaf spring on a vehicle body of a motor vehicle, with a receiving recess configured to house the leaf spring end; a bearing opening configured to mount the bearing shoe on the vehicle body, wherein the bearing opening is confined by an inner wall; and an elastomer bearing disposed in the bearing opening, wherein the elastomer bearing comprises an inner sleeve and an elastomer disposed between the inner sleeve and the inner wall of the beating opening and directly contacts the inner wall of the bearing opening.

Augmenting the functionality of an off-the-shelf additive manufacturing machine, such as a 3D printer, by generating a component design having an autonomy characteristic, and that may impart a functionality to one or more components manufactured by the additive manufacturing machine that is based on an interaction between the component and the additive manufacturing machine. The design includes code for instructing the additive machine to build an ancillary component, such as a cantilever spring, and build the primary manufactured object, and use the cantilever spring to propel the object off the build platform. In this manner the functionality of an off-the-shelf additive manufacturing machine is expanded without physical modification of the machine, and can be implemented remotely to embed additional functionality into designed components that are to be fabricated, for example on spacecraft where physical retrofits are impractical. Other applications include parts and material testing and rapid prototyping.