摘要:
A non-clogging non-pressure compensated drip emitter that utilizes one or more filters or one or more inwardly offset filters that have an inlet that projects inwardly toward a centerline of the hollow cylindrical emitter body and a labyrinth having only turbulent transfer zones after water enters the labyrinth, wherein the labyrinth couples the filter(s) or inwardly offset filter(s) to the pool. Prevents clogging by eliminating dead transfer zones where sediment can accumulate where no turbulence exists. Also prevents clogging when the filter is positioned downward as the inwardly offset filter rises above any sediment when the emitter is positioned in the field in this downward orientation. Also prevents clogging flat filter configurations that have filters offset radially, i.e., redundant filters per emitter.
摘要:
The invention relates to a method and device (1) for producing a composite component, wherein a tubular, hollow section blank (5) is placed into the die cavity (3) of a combination tool comprising an inner high-pressure shaping tool (2) and an injection-molding tool, the combination tool is filled with a fluid in such a way that the blank (5) is wetted from the inside by the fluid, and the ends of the combination tool are sealed by two axial molding plugs (6 and 7). The filled blank (5) under pressure is then widened. The finished hollow section (22) is then plastic-coated in the same tool. In order to produce the composite component in a relatively simple manner and by a reliable process, it is suggested to empty the hollow section (22) after shaping in the sealed state at least until it is no longer dripping, wherein the pressurized fluid (19) is expelled under pressure from the hollow section (22) through at least one discharge channel formed in the axial molding plugs (6 and 7).
摘要:
Coatings for protecting and insulating fluid and/or gas transport conduits, such as off-shore oil and gas pipelines operating at temperatures of up to 100° C. in water depths above 1,000 metres. The outer surface of the conduit is provided with at least one layer of thermal insulation comprising polystyrene or styrene-based thermoplastic, having low thermal conductivity, high thermal softening point, high compressive strength and high compressive creep resistance.
摘要:
The invention relates to a method, in a filling machine, of producing a package with a top of plastic which is injection moulded in the machine and is capped before the top has become configurationally stable. In the method, the capping, at least during a first introductory phase, takes place in that a cap with internal threads is rotated and the package is displaced linearly in a direction towards the cap in such a manner that it may be ensured that the relationship between the speed of rotation of the cap and the speed of displacement of the package substantially correspond to the thread pitch of the threads in the cap and in corresponding threads on the neck when the threads enter into mesh with one another.
摘要:
Manufacturing process for a flexible tube, in which a tubular blank is fitted around a punch so that an end portion of the tubular blank protrudes by a height H from the side wall of the punch; a die is brought up to the punch and the end portion is imprisoned in the cavity thus formed; plastic is injected into the cavity until it comes into contact with the end portion so that it is welded to the skirt, without any additional contribution of heat or matter. The impression of the die used is at a depth greater than the protruding height H of the end portion, and has a ring-shaped boss obstructing the flow of the plastic, the outer edge of the ring-shaped boss and the inner edge of the end portion being distant from each other by a value less than the average thickness e of the transverse wall.
摘要:
A porous filter cartridge comprising: a cap being in the form of a bottomed cylinder and including an opening provided at the center of a bottom part thereof; and at least one porous filters held on the inner side of the cap, and at the bottom part, wherein the cap comprises a plurality of convex ribs provided on the bottom part side of the inner circumferential surface of the cap, and at a part on the circumference of the inner circumferential surface, the plurality of convex ribs protruding to the inside of the cap and bending the outer perimeter end of the at least one porous filters.
摘要:
A plastic part is molded onto a top of a container having folded flaps on the top of the container. The container is formed into a tube shape from a flexible web material with crease lines. Contents are filled into the tube of web material, the tube is transverse sealed and a primary shape container is obtained by cuffing the web material along crease lines. A final shape container is obtained with multi-folding of folded flaps onto the container top. A mold of an injection molding apparatus is applied against the top of the container, and fusion thermoplastic material is injected into the cavity formed between the mold and the top of the container. The thermoplastic material is then cooled, and the mold removed to leave the plastic part molded to the top of the container.
摘要:
A controller for at least one heater utilized in an injection molding system, which includes a regulated voltage supply that is electrically connected to the at least one heater utilized in an injection molding system, at least one sensor operatively associated with at least one heater and utilized in an injection molding system, at least one digital signal processor that is operatively connected to the at least one heater utilized in an injection molding system, the regulated voltage supply and the sensor operatively associated with the at least one heater utilized in an injection molding system based on feedback from the at least one sensor.
摘要:
Disclosed is a method for producing a tube comprising a compressible peripheral wall in an injection molding process by using an injection mold that is provided with a core and a female die. The opening end of the tube is produced in a neck mold which retains the unfinished tube also during opening of the mold. Special measures prevent the soft plastic of the unfinished tube from sticking to the mold.
摘要:
Apparatus for forming a plastic attachment on an article includes clamping mechanisms which position the article and form a mold surrounding the appropriate section of the article. During the process of molding the plastic attachment, the article may be moved through the mold to facilitate forming the attachment along a length of the article. The apparatus is illustrated by an annular mold for forming mating plastic couplings around the ends of tubes such as corrugated and smooth-walled metal pipes.