摘要:
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.
摘要:
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.
摘要:
In a die plate having a hardened surface for sliding a knife, a plurality of WC alloy plates 1b are diffusion-bonded to a base metal 2b, whereby the hardened surface h is formed. A plurality of nozzle holes 4a, 4a . . . are formed on each of the WC alloy plates 1b. Each of the WC alloy plates 1b is 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.
摘要:
In a die plate having a hardened surface for sliding a knife, a plurality of WC alloy plates 1b are diffusion-bonded to a base metal 2b, whereby the hardened surface h is formed. A plurality of nozzle holes 4a, 4a . . . are formed on each of the WC alloy plates 1b. Each of the WC alloy plates 1b is 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.
摘要:
A cutter machine has a knife holder 13 mounted onto a cutter shaft 6 at the center portion, wherein a material to be cut is cut with knives 15 mounted onto the outer circumference of the knife holder 13 by rotating the knife holder 13 around the cutter shaft 6. The knife holder 13 is separated into a fixing member 17 mounted onto the cutter shaft 6 and a mounting member 18 onto which the knives 15 are mounted. The mounting member 18 is pivotally supported around two axes with respect to the fixing member 17. 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.
摘要:
An underwater pelletizing apparatus for realizing and stabilizing a pressure to press a cutting knife against a die plate, for preventing shaft vibration, and for decreasing wear of the cutting knife.The die plate and a water chamber casing are removably mounted at a thermoplastic material extrusion opening section; the cutting knife is disposed at the front of the die plate; a cutter shaft with the knife mounted at the forward end thereof is rotatably and axially movably supported in the water chamber casing and a shaft supporting housing to thereby move the cutter shaft forward and backward by means of a fluid pressure cylinder; and a locking means is provided for intermittently locking the axial movement of the cutter shaft.
摘要:
The invention relates to an angular velocity sensor used in posture control of a moving element or navigation system, and is intended to realize higher sensitivity, lower offset, lower offset drift, lower translation acceleration sensitivity, and higher impact resistance in a small size and at low cost. Being made of ceramic piezoelectric material or crystal material, the constitution comprises four parallel oscillating arms 12 to 15, or 112 to 115, and a support member 11, or 111 for supporting one end of the oscillating arms or both ends commonly, in which outer two oscillating arms 12, 15, or 112, 115 of a compound tuning fork 10, or 110 in a comb shape of which position of the inside root of two oscillating arms each on inside and outside to the support member 11, or 111 in the oscillating arm direction is matched or different are used in the driving side tuning for, while inner two oscillating arms 13, 14, or 113, 114 are used in the detecting side tuning fork so as to correspond between driving and detection.
摘要:
The invention relates to an angular velocity sensor used in posture control of a moving element or navigation system, and is intended to realize higher sensitivity, lower offset, lower offset drift, lower translation acceleration sensitivity, and higher impact resistance in a small size and at low cost.Being made of ceramic piezoelectric material or crystal material, the constitution comprises four parallel oscillating arms 12 to 15, or 112 to 115, and a support member 11, or 111 for supporting one end of the oscillating arms or both ends commonly, in which outer two oscillating arms 12, 15, or 112, 115 of a compound tuning fork 10, or 110 in a comb shape of which position of the inside root of two oscillating arms each on inside and outside to the support member 11, or 111 in the oscillating arm direction is matched or different are used in the driving side tuning for, while inner two oscillating arms 13, 14, or 113, 114 are used in the detecting side tuning fork so as to correspond between driving and detection.
摘要:
A transducer is comprised of a piezoelectric ceramic cylindrical vibrator vibrating radially, and a sheet provided on an outer peripheral surface of the cylindrical vibrator and including a fiber reinforced composite material with fibers oriented only in the direction of central axis of the cylindrical vibrator. Non-piezoelectric cylinder consisting of Al alloy or Mg alloy may be useable instead of the sheet. Another type of transducer includes a cylindrical piezo-transducer vibrating radially, a cylindrical sound radiator with the central axis coincident with the cylindrical piezo-transducer, and a bending coupler provided at a predetermined interval on end surfaces of the two cylinders and coupling the cylindrical piezo-transducer and the cylindrical sound radiator. Other type of transducer is comprised of a cylindrical piezo-transducer vibrating radially, an outside cylindrical sound radiator with its central axis coincident with the central axis of the cylindrical piezo-transducer which contains the piezo-transducer therein, and a coupler extending radially from an outer peripheral surface of the cylindrical piezo-transducer to an inner peripheral surface of the cylindrical sound radiator, thereby coupling both the two.
摘要:
A front mass and a rear mass are respectively provided at both ends of a piezoelectric vibrator. The piezoelectric vibrator, front mass and rear mass are firmly cramped and are contained in a cylindrical resonator. Either the rear mass or the front mass and the cylindrical resonator are connected by a coupler.