Method for forming a welding spout on a parison during the blowing of a tank
A resin composition, blow molding technology, applied in the direction of hollow articles, applications, household appliances, etc., can solve the problem of reduced heat resistance, and achieve the effects of excellent mechanical strength, excellent formability, and excellent heat resistance.
Active Publication Date: 2016-08-10
DIC CORP
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Problems solved by technology
However, the use of olefin-based polymers can impart mechanical strength such as impact resistance to hollow blow molded articles containing polyarylene sulfide resins, but it also causes a decrease in heat resistance.
Method used
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Embodiment 1～11
[0060] [Examples 1 to 11, Comparative Example 1]
[0061] (Manufacture of fiber-reinforced polyarylene sulfide resin composition)
[0062] The polyarylene sulfide resin described in Table 1 was charged into a twin-screw extruder, and melted and kneaded at a discharge rate of the resin component of 25 kg / hr, a screw speed of 250 rpm, and a set temperature of the barrel of 310°C. The glass fiber roving (fiber diameter: 10 to 20 μm) described in 1 is continuously supplied to the dipping machine installed at the front end of the extruder at a ratio of 5 to 50 parts by mass relative to 100 parts by mass of the total of polyarylene sulfide resin and glass fiber. The mold was infiltrated and extruded to produce a thread-like material obtained by covering glass fibers with molten polyarylene sulfide resin. Then, the strands were air-cooled to 23° C. to obtain strands, which were further cut into lengths of 2 to 20 mm with a strand cutter to obtain fiber-reinforced polyarylene sulfide...
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Abstract
The invention relates to a method for forming a welding spout of a plastic tank from a multilayer parison, during the blowing of said parison for manufacturing the tank, characterized in that said method consists of implementing the following steps, in a blowing mould including two cavities and an insert, one of the cavities delimiting a recess for forming the welding spout, said recess having a mouth opening opposite the insert: a push member is provided on the insert opposite the mouth of the recess of the cavity, capable of assuming a first position set back from the recess and a second position in which said push member occupies a portion of the mouth of the recess; the push member is positioned in the first position thereof; the parison is blown such as to match the shape of the cavities; during the creeping of the parison towards the inside of the recess, the push member is moved into the second position thereof.
Description
technical field [0001] The present invention relates to a hollow blow molded article and a method for producing the molded article. Background technique [0002] In recent years, the method of manufacturing pipes in the engine room of automobile parts by hollow blow molding has become popular. At present, polyamide-based materials are mainly used, but the heat resistance of polyamide-based materials is not sufficient. Therefore, heat-resistant It is a material for hollow blow molding with high durability, chemical resistance and impact resistance. [0003] On the other hand, polyarylene sulfide resin (hereinafter sometimes abbreviated as PAS resin) is an engineering plastic excellent in heat resistance, chemical resistance, flame retardancy and electrical properties, and is used for electrical and electronic parts, automobile parts and precision machinery. components and other uses, the demand is increasing. [0004] Although various attempts have been made to hollow blow ...
Claims
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IPC IPC(8): B29C49/20B29C49/04B65D1/00C08J5/04C08K7/02C08L81/02
CPCB29C49/04B29C49/20C08J5/04C08K7/02C08K2201/003C08K2201/016C08J5/043C08J2381/02C08J2381/04B29L2031/712B29K2309/14B29K2267/006B29K2305/00B29K2267/003B29K2081/04B29C49/0005B29K2307/04B29K2309/08B29K2277/10B29K2105/12B29B7/002B29B7/42B29B7/46B29B7/90B29B9/06B29C49/78C08L81/02C08L81/04B29B15/14B29K2105/06B29L2022/00C08K7/14
Inventor 丸山豊弓立恭彦内潟昌则
Owner DIC CORP