An extruder is disclosed including: a barrel; and a screw provided with a helical groove; wherein the screw comprises a dewatering portion comprising a first portion, and a second portion at a location downstream from the first portion; wherein, at the dewatering portion, clearance between the groove and the barrel decreases as one proceeds downstream; and wherein clearance reduction ratio at the first portion is greater than clearance reduction ratio at the second portion.

Described herein is a pigmented composition which is suitable for coating components in an in-mold coating process, a process for coating components, and a method of using the composition for improving the flow behavior of compositions used for producing components. The composition includes at least one solvent L, at least one alkoxylated fatty acid and/or fatty alcohol, at least one alkoxylated polysiloxane, and at least one color base BF.

An apparatus and a method for improving at least one physical property of an extruded plastic material comprise an extruder for extruding the plastic material as well as a laser unit with at least one laser for irradiating the extruded plastic material with laser light. Further, the apparatus has at least one laser light-reflecting reflector arranged at a distance to the extruded plastic material. The laser and the reflector are arranged and designed such that the laser light emitted by the laser is incident on the reflector through the extruded plastic material, the reflector reflects the incident laser light such that at least a part of the reflected laser light hits the extruded plastic material.

According to examples, an apparatus may include a processor and a memory on which is stored machine readable instructions that may cause the processor to identify a color of a portion of a 3D object to be fabricated from a 3D model and to determine, based on the identified color of the portion, a property of a thermal support, in which the property may affect a temperature of an area near build material particles used to form the portion. The instructions may cause the processor to instruct fabrication components to fabricate the thermal support having the determined property and the fabrication components to fabricate the 3D object. The thermal support may be fabricated at a location with respect to the portion to increase a temperature of a set of particles used to fabricate the portion during fabrication of the portion.

An example of a three-dimensional (3D) printing kit includes a build material composition, an epoxy agent to be applied to at least a portion of the build material composition during 3D printing, and a fusing agent to be applied to the at least the portion of the build material composition during 3D printing. The build material composition includes a polyamide having an amino functional group. The epoxy agent includes an epoxy having an epoxide functional group to react with the amino functional group of the polyamide in the at least the portion. The fusing agent includes an energy absorber.

An integrated multi-color animal chew toy and preparation process thereof, including selecting N types of rubbers used to form a product, wherein the rubbers have different colors and different hardness; selecting one type of rubber from the rubbers used to form the product, putting the rubber selected into a first mold, and performing mold forming to form a first molded product; putting part of the first molded product into a second mold, closing the second mold, and then injecting a second rubber selected from the rubbers used to form the product for mold forming to form a second molded product; putting part of the second molded product into a Nth mold, closing the Nth mold, and then injecting a Nth rubber selected from the rubbers used to form the product for mold forming, and then cooling to obtain the product completely.

A process for producing a photosensitive resin for 3D printing includes: (i) treating a vegetable oil with a polyol to form a monoglyceride, (ii) reacting the monoglyceride of step (i) with an unsaturated reagent to form a liquid resin with viscosity lower than 20 Pa.Math.s at the temperature of 20° C., and (iii) mixing the liquid resin with a comonomer and a photoinitiator, as well as the photosensitive resin for 3D printing obtainable from such process and the 3D object obtainable from such photosensitive resin.

A build material for additive manufacturing applications is disclosed. The build material includes a build composition in powder form. The build composition includes a semi-crystalline polymer having a glass transition temperature of at least 60° C. as measured by DSC and a minimum crystallization half-time of greater than 100 minutes as measured by SALS. A semi-crystalline polymer useful in additive manufacturing applications, an additive manufacturing method for producing a three-dimensional object and an additive-manufactured polymer article are also described.

An example of a multi-fluid kit for three-dimensional (3D) printing includes an elasticity agent to be applied to at least a portion of a build material composition during 3D printing and a fusing agent to be applied to the at least the portion of the build material composition during 3D printing. The elasticity agent includes a plasticizer having: a formula (I): wherein n is an integer ranging from 3 to 8; or a formula (II): wherein m is an integer ranging from 3 to 8. The fusing agent includes an energy absorber.