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1. WO2020110370 - METHOD FOR MANUFACTURING BENT RESIN PIPE

Publication Number WO/2020/110370
Publication Date 04.06.2020
International Application No. PCT/JP2019/029451
International Filing Date 26.07.2019
IPC
B29C 45/26 2006.01
BPERFORMING OPERATIONS; TRANSPORTING
29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
45Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
17Component parts, details or accessories; Auxiliary operations
26Moulds
B29C 45/00 2006.01
BPERFORMING OPERATIONS; TRANSPORTING
29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
45Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
B29D 23/00 2006.01
BPERFORMING OPERATIONS; TRANSPORTING
29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
DPRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
23Producing tubular articles
B29L 23/00 2006.01
BPERFORMING OPERATIONS; TRANSPORTING
29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
LINDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C59
23Tubular articles
CPC
B29C 45/00
BPERFORMING OPERATIONS; TRANSPORTING
29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
45Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
B29C 45/26
BPERFORMING OPERATIONS; TRANSPORTING
29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
45Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
17Component parts, details or accessories; Auxiliary operations
26Moulds
B29D 23/00
BPERFORMING OPERATIONS; TRANSPORTING
29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
DPRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
23Producing tubular articles
Applicants
  • 横浜ゴム株式会社 THE YOKOHAMA RUBBER CO., LTD. [JP]/[JP]
Inventors
  • 栗林 延全 KURIBAYASHI Nobuaki
Agents
  • 清流国際特許業務法人 SEIRYU PATENT PROFESSIONAL CORPORATION
  • 昼間 孝良 HIRUMA, Takayoshi
  • 境澤 正夫 SAKAIZAWA, Masao
Priority Data
2018-22400729.11.2018JP
Publication Language Japanese (JA)
Filing Language Japanese (JA)
Designated States
Title
(EN) METHOD FOR MANUFACTURING BENT RESIN PIPE
(FR) MÉTHODE DE FABRICATION DE TUYAU EN RÉSINE COURBÉ
(JA) 屈曲樹脂管の製造方法
Abstract
(EN)
Provided is a method for manufacturing a bent resin pipe with which the pressure resistance of a desired inner bent portion of the bent resin pipe manufactured by resin injection molding using an assisting material is reliably improved. In the present invention: a horizontal rib molding part 15a and a vertical rib molding part 15b, which protrude from an inner bent portion 14a, are formed in a mold 10 in a state of communicating with a cavity 11 in the previously selected bent inner portion 14a of bent parts 12A, 12B of the cavity 11 formed in the mold 10 and extending in a curve; and after the molten resin 17 is injected into the cavity 11, the horizontal rib molding part 15a, and the vertical rib molding part 15b, the assisting material 18 is injected into the cavity 11 and the molten resin 17 is cured, whereby a horizontal rib 7a and a vertical rib 7b are integrally molded in an inner bent portion 6a of bent parts 4A, 4B of a manufactured bent resin pipe 1.
(FR)
L'invention concerne une méthode de fabrication d'un tuyau en résine courbé avec lequel la résistance à la pression d'une partie courbée interne souhaitée du tuyau en résine courbé fabriqué par moulage par injection de résine à l'aide d'un matériau d'assistance est améliorée de manière fiable. Dans la présente invention : une partie de moulage de nervure horizontale 15a et une partie de moulage de nervure verticale 15b, qui font saillie à partir d'une partie courbée interne 14a, sont formées dans un moule 10 dans un état de communication avec une cavité 11 dans la partie interne courbée 14a précédemment sélectionnée des parties courbées 12A, 12B de la cavité 11 formée dans le moule 10 et s'étendant dans une courbe ; et après que la résine fondue 17 est injectée dans la cavité 11, la partie de moulage de nervure horizontale 15a, et la partie de moulage de nervure verticale 15b, le matériau d'assistance 18 est injecté dans la cavité 11 et la résine fondue 17 est durcie, ainsi une nervure horizontale 7a et une nervure verticale 7b sont moulées d'un seul tenant dans une partie courbée interne 6a de parties courbées 4A, 4B d'un tuyau de résine courbé fabriqué 1.
(JA)
アシスト材を用いた樹脂射出成形により製造される屈曲樹脂管の所望の屈曲内側部分の耐圧性を確実に向上させる屈曲樹脂管の製造方法を提供する。モールド10に形成された屈曲して延在するキャビティ11の予め選択された屈曲部12A、12Bの屈曲内側部分14aに、その屈曲内側部分14aから突出する横リブ成型部15aおよび縦リブ成型部15bをキャビティ11に連通させた状態でモールド10に形成しておき、溶融した樹脂17をキャビティ11とともに横リブ成型部15aおよび縦リブ成型部15bに射出した後、このキャビティ11にアシスト材18を注入し、溶融した樹脂17が硬化することにより、製造された屈曲樹脂管1の屈曲部4A、4Bの屈曲内側部分6aに横リブ7aおよび縦リブ7bが一体成形される。
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