摘要:
Disclosed herein is an injection mold for production of marbled moldings, including at least one hot runner, a cavity, an entry opening into the injection mold and an inlet into the cavity, where the hot runner has at least two ducts that are connected at a first end of each duct to the inlet into the cavity and at a second end of each duct to the entry opening into the injection mold, where the at least two ducts each at least partly form a spiral, and the at least two ducts are bounded by a one-piece component. Further disclosed herein is a process for producing the injection mold and a process for producing marbled moldings.
摘要:
A pencil for applying a coloring and/or cosmetic substance, having a pigment core composed of the substance that is to be applied and a one-piece injection-molded casing encompassing the pigment core that is composed of a thermoplastic material that consists of a mix of a first plastic phase and a second plastic phase, wherein the casing, respectively viewed in the radial direction, has an outer enrichment zone with a higher concentration of the first plastic phase than in the middle region and the casing, respectively viewed in the radial direction, has an inner enrichment zone with a higher concentration of the first plastic phase than in the middle region.
摘要:
An injection molded product is disclosed and includes a shingle resembling a cedar shingle tile formed from an amorphous or semi-crystalline thermoplastic and having a wood grain direction. The injection molded product also includes streaks in the shingle that are substantially parallel to the wood grain direction and the streaks extend through an interior of the shingle and appear as contrasting streaks on an exterior of the shingle to form a variegated wood grain appearance. The injection molded product further includes an injection molded vestige in the shingle. The injection molded vestige is located adjacent to a perimeter of the shingle and the injection molded vestige comprises a location at which material entered an injection mold through a gate.
摘要:
In one embodiment, an extruded board includes at least one streak portion including a first colored portion at an outer surface of a core portion of the board, a second colored portion extending into the core from the first colored portion, and a third colored portion extending further into the core from the second colored portion, and at least one resin portion including a first base portion located directly between the second colored portion and the outer surface, and a second base portion located directly between the third colored portion and the outer surface, the resin portion having an opacity which allows the second colored portion to be viewed from the outer surface through the first base portion under natural light, and which does not allow the third colored portion to the viewed from the outer surface through the second base portion under natural light.
摘要:
Injection molding parts onto a carrier web located between mold halves, each mold half having a cavity, resulting in molded articles having parts on both sides of the carrier web. Polymer flow into the cavities is assisted by application of ultrasonic energy to the mold. After the molding operation, mold halves are separated, and the carrier web is advanced, or indexed, to a next position for another molding sequence. Articles produced include lenses with part of the carrier web between lens halves, and a carrier web bearing an array of molded parts.
摘要:
Injection molding parts onto a carrier web located between mold halves, each mold half having a cavity, resulting in molded articles having parts on both sides of the carrier web. Polymer flow into the cavities is assisted by application of ultrasonic energy to the mold. After the molding operation, mold halves are separated, and the carrier web is advanced, or indexed, to a next position for another molding sequence. Articles produced include lenses with part of the carrier web between lens halves, and a carrier web bearing an array of molded parts.
摘要:
When a plurality of striped molded products are molded at a time, the molded products having a striped pattern and an outstanding design property are obtained by preventing part of molten resins from being unevenly distributed in an inappropriate manner when being fed into a cavity of a metal mold. A hot runner nozzle is provided with a first resin flow path and a plurality of second resin flow paths. The first flow path has a funnel section which continues with a nozzle gate at a centripetal position and which allows a first molten resin to be gathered at the centripetal position of the funnel section so as to feed the resin into the nozzle gate. The second resin flow paths have a plurality of corresponding discharge ports facing and communicating with the funnel section of the first resin flow path, each of the discharge ports being disposed around the centripetal position, so that the second molten resin different from the first molten resin is fed into the funnel section.
摘要:
Single or multiple colorants are infused into a thermoplastic material during melt processing to form preforms and plastic containers exhibiting a marbleized or swirl-type pattern. A base resin and colorant may be fed into an extruder having an extrusion screw and/or barrel modified in a manner to cause incomplete and non-uniform mixing. The modifications may include notches in some of the flights along the extrusion screw, a reduction in the depth or omission of some of the flights, a reduction in diameter of the extrusion screw, or the provision of a marbleizing torpedo near the discharge nozzle. Other techniques include introducing the colorant into vents present along the barrel, using a barrier screw to keep the components separate along the length of the barrel, using a high pressure pump for introducing the colorant near the discharge nozzle, or using multi-material co-injection techniques for co-injecting the base resin and colorant.
摘要:
The present invention includes molds for forming a biomedical device, such as an ophthalmic lens. The present invention also includes methods and systems for forming a mold part to process biomedical devices, such as ophthalmic lenses.
摘要:
Methods and apparatus for marbleizing molded parts produced by screw extruder machines. Liquid colorant is advantageously injected at a comparatively high pressure into a melt containing portion of the machine between the screw and its housing, where the melt is either completely molten or more than fifty percent molten.