Kobe Steel, Ltd.

Sayaka Yamada

Kazuo Yamaguchi

Yasuaki Yamane

Kazuhisa Fukutani

Koji Noishiki

Katsunori Takahashi

Koichi Honke

Makoto Nishimura

Yoshinori Kuroda

Yohei Kubo

Tsugushi Fukui

Shigehiro Kasai

Taiji Orimo

Tatsuo Yoshida

Toru Sakatani

Yasuo Higashi

Takaya Uda

A method for reducing gel in a polymer kneaded compound flowing in a polymer flow duct includes flowing a polymer kneaded compound in a polymer flow duct to a gel reduction mechanism including a gel reduction member having one or more through holes defining a squeezing flow path having a flow path cross-sectional area smaller than the polymer flow duct. The squeeze ratio S1/S2 of the squeezing flow path is 25 to 177.8, where S1 is a flow path cross-sectional area of the polymer flow duct and S2 is a sum total of flow path cross-sectional area of the squeezing flow path, to generate an extensional flow in the kneaded compound.

Gel reduction method

A heat exchanger including a stacking block, including: a first plate surface; a second plate surface opposite to the first plate surface; and first and second flow path plates including respective plural first and second through holes that have a standard shape. The first through holes are arranged to line up in a standard array pattern in a first direction in which a first flow path causes a first fluid to flow. The second through holes are arranged in the first direction in the same standard array pattern as the first through holes. Each of the first through holes have an area with a same overlap with the second through holes positioned on both sides of the first through holes, in the first direction. The first flow path is formed by the first and second through holes being mutually joined in the first direction, in the areas of overlap.

Heat exchanger and production method for heat exchanger

Disclosed is a heat exchanger that can more efficiently transfer heat between a heat-exchange fluid and an object with which heat is to be exchanged. A heat exchanger () can transfer heat between a heat-exchange fluid flowing through flow paths (R) and a fluid with which heat is to be exchanged flowing through other flow paths (R) by means of the flow path structure member () (a first metal sheet () and a second metal sheet ()) in which the flow paths (Rand R) are formed. The flow paths (Rand R) are formed so that the side surfaces thereof are not straight and so that the depths thereof change along the flow direction.

Heat exchanger

The degree of kneading of a material to be kneaded is to be capable of being adjusted with a high accuracy. A kneading degree adjusting mechanism is installed in a processing apparatus having a barrel and a kneading screw inserted into the barrel rotatably, the kneading screw having a kneading section and rotating within the barrel to knead a material continuously while feeding the material from an upstream side toward a downstream side. The kneading degree adjusting mechanism includes a push-back section for pushing back the material to the upstream side and thereby making the material stay around the kneading section, the push-back section being disposed downstream of the kneading section in the kneading screw; a kneading degree adjusting member having an opposed surface opposed to an outer periphery surface of the push-back section; and a drive section for actuating the kneading degree adjusting member so that the opposed surface moves toward and away from the push-back section.

Kneading degree adjusting mechanism, extruder, continuous mixer, kneading degree adjusting method, and kneading method

To provide a kneading screw which can reduce such a phenomenon that a disproportional load is imposed onto a shaft of the kneading screw without degrading kneading performance of the kneading screw, a twin screw extruder with the kneading screw, and a method for assembling the kneading screw. In the kneading screw, each of the kneading rotor segments has at least one of a spiral kneading blade or a kneading blade extending in parallel with the axial direction, and is incorporated in the kneading screw such that top blade portions of the kneading blades at the adjacent ends of the kneading rotor segments adjacent to each other in the axial direction of the kneading screw are shifted in phase to each other, and such that the top blade portions of the kneading blades at the respective central positions in the axial direction of the adjacent kneading rotor segments are shifted larger in phase than the case where the top blade portions of the adjacent ends of the adjacent kneading rotor segments are equal in phase to each other.

Kneading screw, twin screw extruder, and method for assembling kneading screw

The kneading disc segment according to the present invention comprises plural disc sets each comprising two kneading discs and mounted on a kneading screw () which is for kneading a material while feeding the material to a downstream side. Disc sets each comprising a first kneading disc positioned on an upstream side and a second kneading disc, the second kneading disc being mounted continuously with and downstream of the first kneading disc so as to have a phase difference &#x3b4; of an acute angle relative to the first kneading disc, are disposed continuously in the axial direction of the kneading screw. The first kneading discs in two continuous disc sets have a phase difference of 180&#xb0;. With this construction, it is possible to attain a higher degree of kneading than in the conventional neutral kneading disc segment.

Kneading disc segment and twin-screw extruder

Provided is a kneading degree adjusting apparatus, which can have a wide adjusting range for a kneading degree even if a gate member and a cylindrical segment are not made so close as to invite a fear of metallic contacts. The kneading degree adjusting apparatus is disposed in a kneading treatment equipment, which includes a cylindrical segment formed at a predetermined portion and a kneading screw for kneading a material while feeding the same to the downstream side, thereby to adjust the kneading degree of the material. The kneading degree adjusting apparatus comprises a gate member having an opposed face confronting the outer circumference of the cylindrical segment and moved toward and away from the outer circumference of the cylindrical segment thereby to change the area of the material passage to be formed between the opposed face and the outer circumference of the cylindrical segment. The outer circumference and the opposed face are corrugated to form the passage into a bent shape.

Kneading degree adjusting apparatus, extruder and continuous kneader

One object of the present invention is to provide a kneader which can diminish wear of screws and a barrel while preventing the manufacturing process for the screws and barrel from becoming complicated. In this kneader, a pair of screws are rotated about respective axes thereof to knead a material to be kneaded which is introduced into a kneading space formed within a barrel. Each screw has such a shape generating deflection in a predetermined direction perpendicular to an arranged direction of the axes of the pair of screws during kneading of the material to be kneaded, and the kneading space has a shape such that a pair of accommodating spaces which accommodate each of the screws respectively are connected together so as to overlap each other partially in the radial direction, each accommodating space being formed in such a manner that the diameter thereof in the predetermined direction in which there occurs deflection of each screw is larger than in any other direction.

Kneader

The device for adjusting the degree of mixing according to the present invention is installed in mixing equipment equipped with a kneading/mixing screw for mixing material while feeding the material to a downstream side, wherein a gate member is moved relative to a portion of a circular section provided for the kneading/mixing screw so as to cause a change in the area of a flow path formed between the gate member and the portion of a circular section, thereby adjusting the degree of mixing of the material. A drive quantity changing device; is disposed between the gate member and a drive member. The drive quantity changing device; is constructed so as to change the drive quantity, x, into the movement quantity, &#x394;&#x3b4;, in accordance with a profile such that a change rate of the movement quantity, &#x394;&#x3b4;, relative to the drive quantity, x, is made smaller when the degree of opening, &#x3b4;, of the gate member is smaller and the change rage of the movement quantity, &#x394;&#x3b4;, relative to the drive quantity, x, is made larger when the degree of opening, &#x3b4;, of the gate member is larger. Through such construction, it is possible to let the degree of mixing change at a constant change rate relative to the drive quantity of the drive member.

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Kobe, Japan

Sayaka Yamada