A method of manufacturing a surgical instrument or prosthesis and an injection moulded surgical instrument or prosthesis are described. A first material is injected into a first mould to form an interim component. A second material is injected into a second mould containing at least part of the interim component to form the surgical instrument or prosthesis such that portions of the first and second materials are exposed at the external surface of the surgical instrument or prosthesis. The first and second materials are visually distinct such that at least one exposed portion of the first or second material adjacent to an exposed portion of the other material forms a marking which is visible to a user.

In some embodiments, a tool includes, in an injection molding machine, a movable internal core configured to receive a molded plastic layer thereon, the molded plastic layer having a thickness. The tool also comprises an injection nozzle configured to inject plastic material over the movable internal core to form the molded plastic layer; an ejection plate connected to the movable internal core; and multiple, movable support plates each having a thickness. The multiple, movable support plates are located behind the ejection plate. A movable support plate of the multiple, movable support plates is configured to determine the thickness of the molded plastic layer.

A flexible nose piece structure for eyewear according to one embodiment, includes a base structure having a pair of nose piece bodies defining grooves on the respective front end and outer side thereof. The nose piece structure further includes a soft and flexible comfort piece having a pair of nose pads attached to an inner side and filling elements received in the grooves of the respective nose piece bodies. Therefore, the nose piece structure provides comfort and multiple flexibilities for self-adjustment while maintaining enough rigidity to provide a stable configuration.

A filler neck assembly including a main channel for supplying a liquid into a tank and an auxiliary channel for evacuating gas from the tank. The main channel includes a tubular main body including a first end receiving a filler spout and a second end discharging the liquid into the tank. The auxiliary channel includes a first section and a second section, the first section being a channel integrally molded with the tubular main body, and the second section being formed by a feature on an exterior of the main body cooperating with a separately formed part.

A connector housing includes a housing main body and a latch arm having a latch arm main body and a latch portion protruding from the latch arm main body. The latch arm main body is formed of a first material, extends like a cantilever from the housing main body, and is elastically deformable with respect to the housing main body. The latch portion is formed of a second material having a higher rigidity than the first material and latches with a latched member. A transition region between the first material and the second material has a continuously changing mixing ratio between the first material and the second material.

An application device for dental compounds includes a housing and an application tool. The housing includes an application channel extending through the housing and an application channel inlet port and an application channel outlet, the application channel outlet being in fluid connection with the application tool. The application device includes a connection section distinct from the housing, the connection section including a connection channel having a connection channel inlet port and a connection channel outlet port. The connection section includes a connecting element arranged at the connection channel inlet port, the connecting element being configured to be connected to an outlet port of a discharging device. The connection channel outlet port is configured to be sealingly connected to the application channel inlet port to build a discharging channel extending from the connection channel inlet port to the application channel outlet.

A method for manufacturing a three-dimensional structure including: preparing a first structure including a fixing face; fixing a plastic layer to the fixing face of the first structure; preparing a conductive wire; and operating an ultrasonic head to apply ultrasonic waves to the conductive wire and to press the conductive wire against the plastic layer, and thereby partly embedding the conductive wire into the plastic layer.

A method of forming a handle for an oral care implement. The method may include first forming a core structure out of a first hard plastic. Next, an elongated handle body may be formed out of a second hard plastic, whereby during formation the elongated handle body is made to partially surround the core structure, while leaving opposing surfaces of the core structure exposed. Finally, a grip cover may be formed out of a resilient material and positioned over at least a portion of the elongated handle body. The oral care implement handle formed by the method may include a handle having an elongated handle body and a core structure. The elongated handle body may have openings in opposing surfaces. The core structure may be partially surrounded by the elongated handle body while protruding from the openings.

A method of over-molding materials includes: providing a first material in a groove in a first portion of a mold such that only a single surface of the first material is exposed to a vacant portion of the mold; providing, via an injection molding process, a second material in a liquid form in the vacant portion of the mold adjacent to, and in engagement with, the first material; and allowing the second material to solidify and become directly coupled to the first material, thus forming a single component. The second material has one or both of a greater hardness when solidified than the first material and/or a higher melting temperature than the first material.

A method for manufacturing an optical lens includes pressing a fluid-state optical material by using a solid-state optical material to inject the fluid-state optical material molten from the solid-state optical material into a cavity. The solid-state optical material is molten only at the part adjacent to the cavity to form the fluid-state optical material, which facilitates transport of the optical material and minimizes residual waste. The pressing force applied to the solid-state optical material can be controlled to hence control the moving rate of the solid-state optical material, thereby precisely controlling the injection volume and injection rate of the fluid-state optical material.