The invention relates to a method (200) for providing a printable melt (12) for operating a printhead (100) for a 3D printer.

According to the invention, the method (200) comprises the following steps: filling (210) a cavity (40) with printable material (10) using a supply device (2), closing (220) an opening cross-section (21) of a piston bushing (4) by advancing a piston (3) from a starting position (3a) in the direction of a nozzle (8) of the printhead (100), converting (230) the material from a solid phase (10) to a liquid phase (12) via a plastic phase (11), solidifying (240) the material (10, 11, 12), ascertaining (250) a spring constant of the liquid phase (12), and preparing (260) the liquid phase (12) for a printing process.

The invention also relates to a printhead (100) for a 3D printer for carrying out the method (200) according to the invention.

A multiple extrusion head for manufacturing parisons from thermoplastic material includes a stationary arranged base frame and a multiple of extrusion heads arranged on the base frame. Each of the extrusion heads has a material inlet, a ring die in fluid connection to the material inlet, an outer die element and an inner die element arranged coaxially to each other, an adjustment element displaceable along a longitudinal axis of the multiple extrusion head, and spring supports arranged between the base frame and the adjustment element. The spring supports are supported in a biased manner against the base frame and the adjustment element such that such that tilting moments between the extrusion heads is reduced.

Coating apparatuses and methods are provided for direct coatings with various shapes. The coating apparatus includes a die body with one or more bores. One or more cams are pivotally mounted within the bores and have one or more recessed areas formed into the respective peripheral surfaces thereof. The one or more cams are rotatable within the die body to dynamically, independently vary the width or shape of the respectively dispensed one or more fluid coatings.

An injection molding machine for manufacturing the spiral bicolor LED hose light just needs a single process and equipment to greatly increase the production efficiency and save the equipment investment costs. The input channel terminal of the second flow channel connected with a first horizontal channel is gradually smaller, and the transportation end terminal of the first horizontal channel connected with a second horizontal channel of larger diameter is gradually larger. The transportation end terminal of the second extruder is connected with the input terminal of the third flow channels. The light strip input channel inputs the LED light strip to pass through the first and second flow channel, which the transparent molten plastic squeezed by the first extruder wraps and covers the LED light strip and the molten plastic with the other color squeezed by the second extruder is spirally wounded on the surface of the transparent molten plastic.

A vertical additive processing system for use with a blow molding machine having a flow head from which a plastic parison is delivered to a mold and producing an article. The system has a servo-controlled accumulation technology (SCAT) unit including (a) an accumulator collecting plastic material when retracted and delivering plastic material when extended, and (b) an actuator directing the accumulator to retract and extend. The system further has a tooling unit including a bushing body adapted to engage the flow head, a distribution ring, a bushing cap, a central aperture defining a main parison flow path, and a distribution channel delivering additional plastic material received from the accumulator to the main parison flow path. The system still further has a material duct connecting the two units through which plastic material delivered by the SCAT unit is transported to and received by the tooling unit.

The present invention discloses a discharge container that is provided with the following: a container body in which contents are stored; a securing member; a discharge vessel including a stem; an exterior section including a top wall section penetrated by molded holes and that discharges the contents from the perforation holes onto a discharge surface of the top wall section; and an inner plate which is provided so as to be freely movable inside the exterior section and which forms a diffusion chamber in the space that is formed with a supply surface of the top wall section.

The present disclosure provides a gasket for closures made from or containing a polyolefin composition (I) made from or containing A) from about 25 to about 62% by weight of a copolymer of butene-1 with ethylene having a copolymerized ethylene content of up to about 18% by mole and without a melting peak detectable at the DSC at the second heating scan; B) from about 38 to about 75% by weight of (i) a propylene homopolymer, or (ii) a propylene copolymer, or (iii) a mixture of two or more of (i) and (ii), having a melting temperature T.sub.m, measured by DSC at the second heating scan, of from about 130 C. to about 165 C.;

wherein the amounts of A) and B) are referred to the total weight of A)+B) and the DSC second heating scan is carried out with a heating rate of about 10 C. per minute.

A device for influencing the volume flow of extruded plastically deformable material conveyed to an outlet nozzle. A flange arranged between an extrusion unit and an outlet nozzle and is connected to the extrusion unit and the outlet nozzle. A duct from the extrusion unit and the outlet nozzle is incorporated in the flange. A piston is mounted in the flange to be rotatable perpendicular to the longitudinal axis of the duct and is located through the duct. In the piston there is a hole which opens into a bypass duct routed to a bypass nozzle. On the outer lateral surface of the piston there is at least one groove in the region of the duct so that, depending on the angular positions of the piston, material can be conveyed through the at least one groove to the outlet nozzle or through the hole to the bypass nozzle.

The present invention provides a kneader/extruder that is provided with a heating cylinder (16), a screw (17) housed in the heating cylinder (16) so as to be capable of rotation and forward/backward movement, and a die (18) attached to the tip of the heating cylinder (16), and generates a plastic compound (6) having a reinforcement fiber kneaded therein, said kneader/extruder being provided with a shutter member (19) that opens and closes a compound extrusion port (18a) provided in the die (18), and performing kneading and extrusion of the compound (6) intermittently. The shutter member (19) may be provided with a scraper (20) that scrapes the compound (6) off from the surface of the die (18). Due to this, this kneader/extruder can generate a one-press portion of the compound and can be easily maintained.

Provided is a method for extruding molten resin in a charging space from a head by converting a rotational motion of an electric motor into a linear motion of a piston disposed in the charging space through a ball screw and thus causing the piston to move vertically, the charging space being a space into which the molten resin can be charged and formed in an accumulator, the head having an extrusion port at a lower end thereof. The method includes a step of separating an upper plate from a lower plate and retracting the upper plate upward by a rotational motion of the electric motor and then charging the molten resin into the charging space with a sufficient charging pressure to push up the piston against weights of the lower plate and the piston in the charging space, the lower plate being disposed over the accumulator and coupled to the piston from above, the upper plate being engaged with the electric motor through a screwing relationship and disposed over the lower plate so as to be able to surface-contact the lower plate and a step of extruding the molten resin from the extrusion port by moving the upper plate downward with the upper plate and the lower plate surface-contacting each other by a rotational motion of the electric motor and thus moving the piston downward in the charging space.