摘要:
A polymer parison to be blow molded into a container configuration including a reduced diameter neck and a taper wall disposed between the neck and a greater diameter body portion of the container, which is shaped to permit a sufficient amount of stretch to be imparted to the taper wall forming portion of the parison which has a less-stretching tendency during the blow molding operation. Polyethylene terephthalate exhibits greatly improved characteristics and enhanced durability when it is biaxially stretched more than a certain fixed level. The parison is formed by injection molding such that when the parison is placed in the mold cavity, the taper wall forming portion is at an increased spaced distance away from the cavity wall so as to achieve a sufficient amount of stretch, as noted in the body forming portion of the parison, when it is blown to assume the contour of the mold.
摘要:
Herein disclosed is a method of orienting the neck of a bottle of a saturated polyester resin so as to enhance the physical properties and durability of the neck. The neck orienting method includes the step of inserting an orienting rod having a taper head into the neck which is being heated. The neck orienting method may include the step of orienting only the mouth edge of the neck.
摘要:
A combustion apparatus for a refuse incinerator has a plurality of rows of grates arranged in parallel in the directions of breadth and in series in the longitudinal directions of a combustion zone and a post-combustion zone of the combustion apparatus. The rows consist of immobile grates and mobile grates alternately arranged. Immobile girders support the immobile grates. Mobile girders support the mobile grates. A partition wall divides the combustion apparatus into the combustion zone and the post-combustion zone. Seals cooperates with the mobile girders and are located on the partition wall. A hydraulic cylinder shuttles the mobile girders. Bearing housings are mounted on upper protrusions of the mobile girders holding the mobile grates so as to be able to vibrate. The engagement between the bearing housing and the mobile grates in the post-combustion zone allows play in the direction of driving the mobile girders so that the working stroke of the mobile grates in the post-combustion zone is shorter than the working stroke of the mobile grates in the combustion zone.
摘要:
In orientation-blow molding equipment, improved heating equipment is used for evenly and uniformly heating an injection molded piece under optimum temperature conditions for the succeeding biaxial orientation, with the aid of an improved jig which contributes to an efficient reheating and molding of the piece.
摘要:
A device for supplying a piece of preformed synthetic resin to the next process line in an apparatus for producing a bottle-shaped blow-molded container of biaxially oriented polyethylene terephthalate by overturning the piece from neck portion upward position into neck portion downward position, engaging the piece thus overturned to neck portion downward position with orienting jigs held at equidistant central angles at the peripheral edge of a turntable rotating at constant speed in predetermined direction, and supplying the piece held at the jigs around the turntable to a next process line adjacent to the turntable. Thus, the pieces can be continuously rapidly and exactly supplied to the next stage or line.
摘要:
The present invention is provided for considerably shortening the construction time of a building that is applied to nuclear power plants. When constructing the building, megablocks having a height that extends to a plurality of floors are produced, and together with combining those megablocks, concrete is poured inside them to form a wall member composed of a megawall structure of steel plate reinforced concrete construction. Alternatively, in addition to the wall megablocks, floor megablocks for forming the floor member of the building are used, and together with combining those megablocks, concrete is poured inside or above them to form a structural member (wall member and floor member) composed of a megawall structure of steel plate reinforced concrete construction.
摘要:
A method of orienting the neck of a bottle of a saturated polyester resin so as to enhance the physical properties and durability of the neck. The neck orienting method includes the step of inserting an orienting rod having a taper head into the neck which is being heated. The neck orienting method may include the step of orienting only the mouth edge of the neck.
摘要:
A biaxially oriented bottle of saturated polyester resin has a disadvantage that the mouth or the part extending from the neck to the shoulder, which is not oriented or is oriented only a little, is much poorer in durability and resistance to the content liquid than the body which is molded under sufficient orientation. Such a disadvantage has been surmounted in this invention by covering the inside of the mouth or the part extending from the neck to the shoulder, which is in direct contact with the content liquid, with a layer which is durable and resistant to the content liquid.
摘要:
A sensing circuit for detecting a change in a normal characteristic of an object such as a change in a normal temperature characteristic, a change in a normal magnetic field characteristic, or a change in a normal light falling on the sensing element of the sensing circuit is provided. The circuit employs a four-terminal semiconductor device having alternate layers of conductivity type, which has an amplification characteristic of the collector current to the base-emitter grounded, wherein there is a sharp decrease in the h.sub.FE amplification characteristic at one value of gate to emitter voltage. This point represents the point in which the semiconductor device is biased for a normally desired characteristic being sensed. Whenever there is a deviation from this normal position, there is a sharp rise in the h.sub.FE irrespective of what the direction of deviation is. The h.sub.FE gain then substantially levels off.
摘要:
Herein disclosed is a method of orienting the neck of a bottle of a saturated polyester resin so as to enhance the physical properties and durability of the neck. The neck orienting method includes the step of inserting an orienting rod having a taper head into the neck which is being heated. The neck orienting method may include the step of orienting only the mouth edge of the neck.