MANUFACTURE OF TANK

• Main Authors: NAKADA TORU, HONGO TSUTOMU
• Format: Patent
• Language: English
• Published: 08.04.1992
• Subjects: AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS INVEHICLES; ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OFTRANSMISSIONS IN VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GASEXHAUST OR FUEL SUPPLY OF PROPULSION UNITS, IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULARARTICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; LAYERED PRODUCTS; LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM; PERFORMING OPERATIONS; SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, ORMANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR; SHAPING OR JOINING OF PLASTICS; TRANSPORTING; VEHICLES IN GENERAL; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

PURPOSE:To improve heat resistance and enable the interior to be always seen through clearly by blow-molding a main layer of two-tier structure using a material which can be seen through with an external layer of a material which blocks an internal view, and cutting off part of the external layer to expose the main layer for the formation of a see-through window. CONSTITUTION:A tank 1 consists of two structural parts, that is, a main layer 6 and an external layer 5, that is, a main layer 6 and an external layer 5. In other words, the tank 1 has an external layer 5 formed over the entire surface of the mina layer 6, with a part corresponding to a see-through window 2, the external layer 5 of which is expanded toward the exterior with the main layer 6. The external layer 5 constituting the tank 1 is made of a material containing 1% black pigment added to polypropyrene which prevents the interior from being see through, and the main layer 6 is made of natural-colored and transparent or translucent milk-white polypropyrene. After blow-molding, the expanded part 7 of the tank 1 is cut off using a knife along the surface of the external layer 5 as a guide so that the expanded part 7 is flush with the surface of the latter. Subsequently, a see-through window 2, through which the main layer 6 is exposed, is on the cutoff part. Thus a tank with a vertically slit-like see-through window 2 is formed on the lateral side.