摘要:
The invention provides tube-filling machines and methods for, in such machines, end sealing of double tubes (10), that is to say the tube type which has concentric packing tubes (11, 12) which are connected to a common tube shoulder (13) provided with a dispensing opening. The invention provides a two-part hot-gas nozzle (22) with individual supply of hot gas to the inner side of the inner tube and the outer tube for thermal activation of the sealing end of the double tube intended for heat sealing.
摘要:
On procède à une extrusion au départ d'un mélange de granules classiques pour une composition extrudable d'une première couleur comportant une proportion déterminée de granules d'une deuxième couleur, ces granules de deuxième couleur présentant des caractéristiques de comportement thermique differentiel par rapport aux granules de la première couleur, de manière qu'aux températures d'extrusion, elles ne subissent pas une fusion complète mais restent au moins partiellement à l'état solide. Application à des cordons de soudure pour revêtements de sols thermoplastiques (tels que le PVC) ou pour des revêtements de sols thermodurcissables (tels que le linoleum).
摘要:
Es handelt sich um eine Vorrichtung zum Verschweißen von mit Fugenabstand nebeneinander verlegten plattenförmigen oder bahnenförmigen Bodenbelägen aus Kunststoffwerksoff unter Einbringen einer mittels Heißluft erweichten Schweißschnur (36) in eine Fuge (47). Sie besteht aus einem tragbaren motorisch angetriebenen Wagen (11), an dessen Gehäuse (12) zwei auf einer gemeinsamen Achse (13) sitzende Antriebsräder (14,15) und ein Stützrad (16) gelagert sind, sowie aus einem Heißluftgebläse (50) und einer mit demselben verbundenen Düse (19) und einem Zuführrad (35) für die Schweißschnur. Dabei ist die Düse (19) ortsfest am Gehäuse (12) angeordnet und liegt gemeinsam mit dem Zuführrad (35) in einer Ebene vor der äußeren Stirnfläche (37) eines Antriebsrades (15). Mit einer derartigen Vorrichtung kann die Zufuhr der Heißluft gezielt auf das Innere der Fuge sowie auf die strangförmige Schweißschnur gerichtet werden.
摘要:
Articles for food use are made by bonding ultra high molecular weight polyethylene surfaces. The surfaces are cleaned to remove grease and dirt. The surfaces are immobilized in spaced relation to each other with a rigid support abutting the surfaces. The surfaces (6,7) are softened and a filler material (3) surface softened with hot inert gas to make the outermost portion of each surface transparent. The filler material (3) is pressed into the joint or gap (2) between the immobilized surfaces. The article is cooled and removed from the rigid support surface.
摘要:
A heat and sealant delivery nozzle (40) is constructed for sealing seams between adjacent sheets of flooring (12,14). The nozzle (40) of the invention is formed from separate, mating sealant feeding (42) and hot air conducting members (44) that fit to and are secured together. The two part construction of the nozzle (40) produces first (46) and second (48) enclosed plenum chambers therebetween with a series of ducts and passages that preheat both the groove (20) in the flooring that is to receive molten sealant, and the sealant (108) itself. Furthermore, although the pattern of ducts, passages, and cavities within the finished nozzle (40) is quite intricate, the ducts, passageways, and ports are formed without great difficulty due to the two part construction of the nozzle (40). Moreover, the nozzle (40) is constructed so that the hot air does not mix with the sealant (108) within an internal melting chamber, but rather makes contact with the molten sealant only when the sealant (108) leaves the nozzle (40).
摘要:
The invention concerns a method and arrangement for manufacturing a wire or cord for welding floor covering, such as linoleum, or an artificial fibre floor covering, which filler wire forms a fixed joint with the separation edges of floor coverings provided with colours and patterns that are placed beside one another, under the influence of thermal processes, all this in such a way that there is hardly any difference in colours and patterns between weld and floor covering. To this aim, according to the invention, a mixture of coloured granules (4) is subjected to a process of mixing, heating (9) and cooling (13) in an arrangement that is designed to this aim.
摘要:
In one embodiment, a sight tube flowmeter is formed of a plurality of fluoropolymer components welded together to form a unitary flowmeter body. The components can comprise a PFA upright sight tube (16) having two end portions (30, 32), a flow conduit (34) extending therethrough and two fitting portions (14, 18) that are uniquely welded onto each end of the sight tube, and a fluoropolymer float device (78) movable to various positions within the flow conduit depending on the flow level of the fluid flowing therethrough. The float device can be of conventional design or for those flowmeter embodiments where low fluid flow rates are to be measured, an elongate float can be utilized. The floats and, in particular, a designated portion thereof, are visible through the sight tube to provide visual indication of the position, and thus the flow rate of fluid flowing through the flowmeter.