A polymer melt candle filter having a support which comprises a hollow cylindrical body defined by a first end, a second end, and a cylinder wall having a first end portion and a second end portion. The first end portion includes a screw thread on its outside surface and optionally a hex fitting on its inside surface for receiving a hex wrench. The second end portion includes a plurality of holes in the cylinder wall. The area of the openings of the holes on the outside surface of the cylinder wall may be larger than the area of the openings of the corresponding holes on the inside surface of the cylinder wall. The shape of the openings of the holes on the outside surface may be non-circular. A polymer melt filter plate assembly which comprises (a) a support plate comprising a plurality of threaded holes; (b) at least one filter which is screwed into at least one of the threaded holes via the screw thread on the outside surface of the first end portion of the filter support; (c) a tie rod with (i) a first end extending through a hole in a cone insert and a cap located at the second end of the filter support, and (ii) a second end extending through a threaded hole in the support plate; and (d) a cross bar which is attached to the second end of the tie rod for holding the support plate inside a shaft of an apparatus for filtering a polymer melt.

A lamination molding apparatus which can remove the non-sintered material powder after completion of lamination molding easily and with less time after completion of laminating/molding, is provided. According to embodiments of the present invention, a lamination molding apparatus to conduct lamination molding using a material powder, including: a chamber filled with an inert gas having a predetermined concentration; a molding table provided in the chamber, the molding table being capable of moving vertically; a powder retaining wall surrounding the molding table so as to retain the material powder supplied on the molding table; and a powder discharging section provided on or below the powder retaining wall, the powder discharging section being capable of discharging the material powder, is provided.

A polymer melt candle filter having a support which comprises a hollow cylindrical body defined by a first end, a second end, and a cylinder wall having a first end portion and a second end portion. The first end portion includes a screw thread on its outside surface and optionally a hex fitting on its inside surface for receiving a hex wrench. The second end portion includes a plurality of holes in the cylinder wall. The area of the openings of the holes on the outside surface of the cylinder wall may be larger than the area of the openings of the corresponding holes on the inside surface of the cylinder wall. The shape of the openings of the holes on the outside surface may be non-circular. A polymer melt filter plate assembly which comprises (a) a support plate comprising a plurality of threaded holes; (b) at least one filter which is screwed into at least one of the threaded holes via the screw thread on the outside surface of the first end portion of the filter support; (c) a tie rod with (i) a first end extending through a hole in a cone insert and a cap located at the second end of the filter support, and (ii) a second end extending through a threaded hole in the support plate; and (d) a cross bar which is attached to the second end of the tie rod for holding the support plate inside a shaft of an apparatus for filtering a polymer melt.

A molten material processing control system, such as a plastic injection molding system, is provided with a pressure sensor, such as a melt pressure transducer, in fluid communication with filtered molten material, thereby ensuring the molten material to which the pressure sensor is exposed is free from inconsistencies, impurities, unmelted plastic pellets, or other debris. In one embodiment, the filter is a linear edge nozzle filter and a pressure sensor is disposed in fluid communication with an exit groove thereof. In another embodiment, the filter is a disc-shaped tramp filter and the pressure sensor is disposed downstream of the filter.

A molten material processing control system, such as a plastic injection molding system, is provided with a pressure sensor, such as a melt pressure transducer, in fluid communication with filtered molten material, thereby ensuring the molten material to which the pressure sensor is exposed is free from inconsistencies, impurities, unmelted plastic pellets, or other debris. In one embodiment, the filter is a linear edge nozzle filter and a pressure sensor is disposed in fluid communication with an exit groove thereof. In another embodiment, the filter is a disc-shaped tramp filter and the pressure sensor is disposed downstream of the filter.

Provided is a manufacturing method of a reflector which is capable of optimally controlling light distribution and suppressing attachment of foreign substances on a surface from which light is reflected, due to the static electricity, and includes (a) injecting a plastic injection product through a mold having an inner surface which is subject to a lapping process; (b) cleaning a surface of the plastic injection product with an ultrasonic wave to remove foreign substances; (c) performing a plasma surface treatment to improve adhesiveness of the plastic injection product cleaned with the ultrasonic wave; (d) depositing an aluminum thin film above the plastic injection product; and (e) performing top coating which is formed as an antistatic layer, on the plastic injection product on which the aluminum thin film is deposited.

Provided is a manufacturing method of a reflector which is capable of optimally controlling light distribution and suppressing attachment of foreign substances on a surface from which light is reflected, due to the static electricity, and includes (a) injecting a plastic injection product through a mold having an inner surface which is subject to a lapping process; (b) cleaning a surface of the plastic injection product with an ultrasonic wave to remove foreign substances; (c) performing a plasma surface treatment to improve adhesiveness of the plastic injection product cleaned with the ultrasonic wave; (d) depositing an aluminum thin film above the plastic injection product; and (e) performing top coating which is formed as an antistatic layer, on the plastic injection product on which the aluminum thin film is deposited.

A filter candle to separate contaminants from a plastic melt is disclosed. The filter candle has a filter element through which a melt flow is directed to retain contaminants contained in the melt flow, and a supporting body to support the filter element. The supporting body is a hollow body having multiple passages for the melt flow. At least one additional supporting body is on the side of said filter element that faces away from the supporting body. The additional supporting body acts on surface regions of the filter element and/or accommodates them such that the filter element can be backwashable.

A filter candle to separate contaminants from a plastic melt is disclosed. The filter candle has a filter element through which a melt flow is directed to retain contaminants contained in the melt flow, and a supporting body to support the filter element. The supporting body is a hollow body having multiple passages for the melt flow. At least one additional supporting body is on the side of said filter element that faces away from the supporting body. The additional supporting body acts on surface regions of the filter element and/or accommodates them such that the filter element can be backwashable.

A polymer melt candle filter having a support which comprises a hollow cylindrical body defined by a first end, a second end, and a cylinder wall having a first end portion and a second end portion. The first end portion includes a screw thread on its outside surface and optionally a hex fitting on its inside surface for receiving a hex wrench. The second end portion includes a plurality of holes in the cylinder wall. The area of the openings of the holes on the outside surface of the cylinder wall may be larger than the area of the openings of the corresponding holes on the inside surface of the cylinder wall. The shape of the openings of the holes on the outside surface may be non-circular. A polymer melt filter plate assembly which comprises (a) a support plate comprising a plurality of threaded holes; (b) at least one filter which is screwed into at least one of the threaded holes via the screw thread on the outside surface of the first end portion of the filter support; (c) a tie rod with (i) a first end extending through a hole in a cone insert and a cap located at the second end of the filter support, and (ii) a second end extending through a threaded hole in the support plate; and (d) a cross bar which is attached to the second end of the tie rod for holding the support plate inside a shaft of an apparatus for filtering a polymer melt.