A blemish free surface is formed on the cavity side of a set of mold or die blocks, said set consisting of a core side and a cavity side, by use of a softer alloy on the core side as contrasted to the cavity side so that, during plastic injection molding, the core side will wear at the parting line in preference to the cavity side whereby erosion of the set occurs on the core side in preference to the cavity side leaving the cavity side erosion free.

An expandable and contractible hose, the hose includes a segmented tubular wall circumscribing an interior. The segmented tubular wall is made up of a plurality of contiguous segments. Each contiguous segment expands along the length of the hose with the application of pressure from within. A bias holds the contiguous segments in a collapsed state when no pressure is applied from within the interior. A pressurized fluid passing within the interior overcomes the bias and causes the contiguous segments to expand into an expanded state.

Provided is a cold press molded body having excellent fastening strength and fastening stability as well due to the use of a discontinuous carbon fiber and a discontinuous glass fiber for adjusting the volume, preferably the volume resistivity, of an end region (flowing region).

An extruder has a barrel extending from a feed inlet end to an extruder outlet end. The barrel has an inner surface, an outer surface, and a wall thickness between the inner and outer surfaces. The extruder also has at least one heating member positioned provided on the barrel; a screw drive motor drivingly connected to a rotatably mounted screw positioned within the barrel, whereby the screw is rotatable at various revolutions per minute (RPM); and a controller is operably connected to the screw drive motor to adjust the RPM of the screw based upon a temperature of material passing through and/or being extruded from the barrel. Methods for operating an extruder filling a mold are also provided.

A dissimilar material joint including a joined portion between a resin rib and a metal base, in which the metal base forms a protrusion protruding inside of the resin rib on at least a part of the joined portion.

A method of manufacturing a solid freeform fabrication object includes forming a layer of resin powder for solid freeform fabrication including particles having a pillar-like form and solidifying a particular area of the layer with irradiation of laser beams, wherein the laser beams have an energy intensity distribution having a top hat-like form.

A hot or cold runner device for an injection mold includes a distributor block for polymer melts or polymeric liquids such as liquid silicone. The distributor block includes at least one central supply line, at least one melt channel, at least one fluid outlet, and at least one exchangeable deflection and/or distribution insert. The deflection and/or distribution insert has a sleeve and a cone element for deflecting and/or distributing the melts or liquids and is mounted without gaps and without offset at flow channel transitions by a pressing-in process, and the cone element is held in the sleeve in a self-locking manner.

A method of extruding a melt of a linear low-density polyethylene (LLDPE) without surface melt fracture, the method comprises heating a melt of the LLDPE to a temperature from 190.0 to 260.0 degrees Celsius; and extruding through a die the heated melt at a shear rate of from 1,100 to 7,000 per second and at a shear stress of greater than 0.40 megapascal, thereby forming a polyethylene extrudate without surface melt fracture.

Disclosed is a method of manufacturing a transparent stretchable substrate according to various embodiments of the present disclosure. The method may include generating a substrate part formed of an elastic material, generating an auxetic including a plurality of unit structures on the substrate part, and generating a fixing part on the substrate part on which the auxetic is generated.

A thermally conductive sheet having a binder resin, a first thermally conductive filler, and a second thermally conductive filler, wherein the first thermally conductive filler and the second thermally conductive filler are dispersed in the binder resin, and the specific permittivity and the thermal conductivity are different in the thickness direction B and the surface direction A of the thermally conductive sheet. A thermally conductive sheet includes step A of preparing a resin composition for forming a thermally conductive sheet by dispersing a first thermally conductive filler and a second thermally conductive filler in a binder resin, step B of forming a molded block from the resin composition for forming a thermally conductive sheet, and step C of slicing the molded block into a sheet and obtaining a thermally conductive sheet having different relative permittivity and thermal conductivity in the thickness direction and the surface direction.