A color 3D printer and its method of use are disclosed. The color 3D printer uses a number of chambers to dye a filament to a given color. This colored filament is then extruded, pursuant to an associated 3D model of an object, to produce varying colored physical objects, on demand, with the use of a single filament and a single print head. Further, the color 3D printer features a waste management apparatus which provides a number of ways to dispose of waste fluid.

Three-dimensional printing pens and related systems and methods are provided. A three-dimensional printing pen may include a plurality of cartridges, each cartridge having a hollow cartridge body sized and shaped to include a colored thixotropic paste, a color of each thixotropic paste being different from a color of another thixotropic paste, and a plurality of nozzles, each nozzle fluidly communicatively coupled to a corresponding cartridge. The three-dimensional printing may further include a motor unit operably coupled to the plurality of cartridges, the motor unit operable to expel the colored thixotropic paste from each cartridge through the corresponding nozzle, a mixing tip fluidly communicatively coupled to the plurality of nozzles, the mixing tip sized and shaped to dispense therethrough one or more of the colored thixotropic pastes in a form of an output thixotropic paste, and a projection module. The projection module may include a light engine assembly that emits light having a wavelength, the light being projected to the output thixotropic paste to cure the output thixotropic paste that is dispensed from the mixing tip.

A plastic form and its manufacturing process are disclosed. The process involves a single-screw extruder and a twin-screw extruder in mixing a first material and a second material, and a hydraulic distributor evenly distributing the first and second materials to a mesh forming machine to produce the plastic form. The plastic form has a mesh structure by a first piece, a second piece, multiple first partitions, at least a second partition, multiple channels. The first and second materials respectively include at least one of PP particles, PE particles, PC particles, PA particles, ABS resin particles, fiberglass particles, and stone powder, in accordance with application requirement. The plastic form has advantages such as high structural strength, impact resistance, adhesion, hardness, anti-skidding, and flame retarding. As recycled materials are used, the plastic form is also inexpensive and environmentally friendly.

A plastic form and its manufacturing process are disclosed. The process involves a single-screw extruder and a twin-screw extruder in mixing a first material and a second material, and a hydraulic distributor evenly distributing the first and second materials to a mesh forming machine to produce the plastic form. The plastic form has a mesh structure by a first piece, a second piece, multiple first partitions, at least a second partition, multiple channels. The first and second materials respectively include at least one of PP particles, PE particles, PC particles, PA particles, ABS resin particles, fiberglass particles, and stone powder, in accordance with application requirement. The plastic form has advantages such as high structural strength, impact resistance, adhesion, hardness, anti-skidding, and flame retarding. As recycled materials are used, the plastic form is also inexpensive and environmentally friendly.

A system comprising: (1) a grinding unit configured to receive and grind recycled PET bottles into a group of polymer flakes comprising up to about ten percent colored polymer flakes and balance substantially clear polymer flakes; (2) a washing unit configured to wash the group of polymer flakes; and (3) an extruder configured to extrude material in a plurality of different extrusion streams. The extruder may be further configured to: (1) receive a concentrate-polymer mixture comprising a mixture of the polymer flakes and a color concentrate; (2) melt the concentrate-polymer mixture to produce a polymer melt; (3) reduce a pressure within the extruder; and (4) pass the polymer melt through the extruder so that the polymer melt is divided into the plurality of extrusion streams. The system may then filter the polymer melt through at least one filter and form the polymer melt into bulked continuous carpet filament.

In-situ polymerized polymer film facilitates improved paint film appliques with reduced defects. The paint film appliques comprise the in-situ polymerized polymer film as a carrier layer. The carrier layer is colored and, preferably defect-free.

In-situ polymerized polymer film facilitates improved paint film appliques with reduced defects. The paint film appliques comprise the in-situ polymerized polymer film as a carrier layer. The carrier layer is colored and, preferably defect-free.

A method for manufacturing a bracelet made of synthetic material for watches or jewellery including at least one strand, the method including a step of making, by moulding or extrusion, a band of synthetic material intended to form at least one strand, the method being wherein it then includes a step of chemical mechanical polishing the band. A bracelet made of synthetic material for watches or jewellery includes at least one strand formed of an extruded or injection moulded band, wherein at least one strand has a roughness Rp less than or equal to 3 μm and preferably less than or equal to 2 μm.

A method for manufacturing a bracelet made of synthetic material for watches or jewellery including at least one strand, the method including a step of making, by moulding or extrusion, a band of synthetic material intended to form at least one strand, the method being wherein it then includes a step of chemical mechanical polishing the band. A bracelet made of synthetic material for watches or jewellery includes at least one strand formed of an extruded or injection moulded band, wherein at least one strand has a roughness Rp less than or equal to 3 μm and preferably less than or equal to 2 μm.

The present invention relates to a three-dimensional (3D) pen with a novel structure which enables filaments having various colors to be easily selected and used. According to the 3D pen according to the present invention, a user laterally rotates the adjustment lever (25) to allow the driving motor (24) to be connected to different transfer rollers (22), thereby selectively transferring and discharging a plurality of different filaments (1) forward. Therefore, the 3D pen has a very simple structure and has an advantage in that the filaments (1) having various colors can be easily selected to manufacture objects having various colors.