Kabushiki Kaisha Kobe Seiko Sho

Kobe Steel, Ltd.

Kabushiki Kaisha Kobe Seiko Sho (kobe Steel, Ltd.)

Nobuki Nagami

Kazuo Iritani

Masashi Konno

Shinichi Fukumizu

Katsunori Takahashi

Shigehiro Kasai

Osamu Ikeda

Yasuo Yoshii

Yoshiaki Nakata

Shoji Yoshimura

Kazuhisa Fukutani

Koichi Honke

Shin Iwasaki

Hiroyuki Takeda

Taiji Orimo

Nobuhiro Yamasaki

Taii Orimo

Hideki Uota

Toru Yomogida

Jun Yamanaka

Osamu Tatsuda

Atsushi Shigeno

Shin Iwaski

A die for an underwater cutting type pelletizer, the die including a die orifice part in which a thermoplastic resin is inhibited from solidifying within the die orifices. The die can have a reduced difference in temperature between the die orifice part and an inner periphery-side fixing part for fixing the die orifice part to a mixer/extruder, and can thereby inhibit the generation of thermal stress. The die is characterized by being equipped with a heating jacket for heating the inner periphery-side fixing part, the heating jacket being disposed within the inner periphery-side fixing part along an inner annular passage formed within either the die orifice part or the inner periphery-side fixing part or both along the boundary between the die orifice part and the inner periphery-side fixing part.

Die for underwater cutting type pelletizer

An underwater cutting pelletizer is disclosed wherein a water chamber is circular in plan, an inlet portion is formed on one side in a diametrical direction of the water chamber to introduce cooling water into the water chamber, and an outlet portion is formed on the other side in the diametrical direction of the water chamber to discharge the cooling water from the interior of the water chamber to the exterior, the inlet portion being in a divergent shape in an inflow direction of cooling water. The retention time of pellets in the interior of the water chamber can be made as short as possible.

Underwater cutting pelletizer

A cutter machine has a knife holdermounted onto a cutter shaftat the center portion, wherein a material to be cut is cut with knivesmounted onto the outer circumference of the knife holderby rotating the knife holderaround the cutter shaft. The knife holderis separated into a fixing membermounted onto the cutter shaftand a mounting memberonto which the knivesare mounted. The mounting memberis pivotally supported around two axes with respect to the fixing member. In the cutter machine, the knives and a die plate come into contact with each other by a small press force of the knives, thereby enabling a satisfactory cutting to be obtained.

Cutter machine

In a die plate having a hardened surface for sliding a knife, a plurality of WC alloy platesare diffusion-bonded to a base metal, whereby the hardened surface h is formed. A plurality of nozzle holes. . . are formed on each of the WC alloy plates. Each of the WC alloy platesis formed into a shape having a thickness of 2.5 mm or more and two adjacent edges 20 mm or more in length, wherein each edge is 200 mm or less in length. The die plate has high freedom in an arrangement of nozzle holes to enable a close arrangement of a number of nozzle holes, has an extended life with hardly causing dropping-off of a member constituting a hardened surface, and can be produced with a minimized number of processes.

Die plate

The bearing cooling device causes cooling media to flow into the interior of a journal bearing for supporting a shaft part by lubrication of high viscous fluid and the interior of the shaft part to cool the shaft part and the bearing At this time, cooling medium temperature of the bearing is set to be higher than cooling medium temperature of the shaft part It is constituted so that the cooling medium passes the cooling medium passage and thereafter passes the cooling medium passage internally of the bearing. A heated medium supply device for supplying a heated medium to each cooling medium passage may be provided. The bearing cooling device is used suitably for a gear pump.

Bearing and shaft cooling device

To provide a gear pump for carrying high viscous liquid, which keeps a bearing in a free state and enhances reliability relative to a leakage of cooling medium and a leakage of molten resins. The gear pump in which a pair of gear rotors are supported on a body of the gear pump through a bearing , a cover for preventing the bearing from being slipped out is secured to the body , and a temperature adjusting medium passage is formed in the bearing , wherein an inlet pipe and an outlet pipe to the temperature adjusting medium passage are connected to the axial outer end of the bearing , an intermediate plate is interposed between the axial outer end of the bearing and the cover , the intermediate plate being provided with an insert hole for the inlet pipe and the outlet pipe , the cover being provided with a guide portion having the inlet pipe and the outlet pipe loosely fitted therein to guide them to outside. Further, at least a part of the inlet pipe and the outlet pipe is formed from a flexible member.

Gear pump having a bearing with a temperature adjusting medium passage

Filter member and screen changer for use in resin extruder

A driving mechanism for driving a gear pump of a dual drive type having two shafts comprises a reversing gear having a pair of output shafts which rotate respectively in opposite directions at the same rotating speed, and a pair of gear couplings connecting the gear pump to the reversing gear. One of the pair of gear couplings comprises: a shaft, a first coupling head disposed on one end of the shaft, and a second coupling head disposed on the other end of the shaft. The number z.sub.1 of teeth of the component external spur gears and internal spur gears of the first coupling head is not equal to the number z.sub.2 of teeth of the component external spur gears and internal spur gears of the second coupling head. The angular difference between the external spur gears of the second coupling head is converted into a corresponding number of teeth of the external spur gear of the third coupling sleeve by calculation using the difference between the central angle including one tooth of the external gear of the first coupling head and the central angle including one tooth of the external gear of the second coupling head, and the third coupling sleeve is turned through an angle corresponding to the calculated number of teeth.

Driving mechanism for driving a gear pump for forcing a highly viscous

A melt pump comprises a pump housing having an intake port and a discharge port and a pair of gear rotors. Each of the pair of gear rotors having a gear part and a shaft part integrated with each other, which are arranged within the pump housing in such a manner as to be rotatable in mutually meshing condition. The melt pump further comprises a recovering passage for guiding resin leaking through a clearance between the pump housing and each of the pair of gear rotors into the intake port, a cooling hole drilled inside each of the gear rotors while facing to each clearance forming region; and a pipe inserted into the cooling hole for supplying cooling liquid. A sleeve for lining the internal periphery of the cooling hole is located in the hole so as to utilize the inside of the sleeve as a cooling liquid passage.

Melt pump

Growing community of inventors

Takasago, Japan

Nobuki Nagami