Composite molded article and manufacturing method thereof
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B32B-003/08
B29C-045/00
B29C-045/16
B29C-045/17
B60J-010/00
B60J-010/02
B29C-045/14
B29L-031/30
출원번호
US-0807757
(2011-07-01)
등록번호
US-9073286
(2015-07-07)
우선권정보
JP-2010-167546 (2010-07-08)
국제출원번호
PCT/JP2011/065169
(2011-07-01)
§371/§102 date
20130208
(20130208)
국제공개번호
WO2012/005181
(2012-01-12)
발명자
/ 주소
Suzuki, Akihiro
Kamiya, Kohji
Yamada, Tetsuro
출원인 / 주소
TOKAI KOGYO CO., LTD.
대리인 / 주소
Oliff PLC
인용정보
피인용 횟수 :
0인용 특허 :
6
초록▼
A method for manufacturing a composite molded article including: preparing a main body member to which a through hole is formed to a peripheral wall by removing a protruding portion protruding from a face of the peripheral wall surrounding a hollow space in the main body member having the hollow spa
A method for manufacturing a composite molded article including: preparing a main body member to which a through hole is formed to a peripheral wall by removing a protruding portion protruding from a face of the peripheral wall surrounding a hollow space in the main body member having the hollow space formed therein along the longitudinal direction; setting the main body member in an injection molding die; forming a cushion member molding cavity by the main body member and a molding die face formed inside the injection molding die in the longitudinal direction of the main body member and allowing the through hole to communicate with the cavity; and filling a heated and melted elastic polymer material injected from an injection gate into the cavity and the hollow space from the through hole, thereby forming a cushion member and a filling portion.
대표청구항▼
1. A method for manufacturing a composite molded article which integrally includes: a main body member configured to be attached to a member to be attached, formed in an elongated shape from a polymer material having rigidity, and having a hollow space formed therein along a longitudinal direction t
1. A method for manufacturing a composite molded article which integrally includes: a main body member configured to be attached to a member to be attached, formed in an elongated shape from a polymer material having rigidity, and having a hollow space formed therein along a longitudinal direction thereof; and a cushion member formed from an elastic polymer material having a lower degree of hardness than the main body member, joined to an edge of the main body member, and having an elongated portion extending in the longitudinal direction along the edge, the method comprising: a step of preparing the main body member to which a through hole, which allows the hollow space to communicate with external air, is formed to a peripheral wall surrounding the hollow space by removing at least one protruding portion which is formed to one surface of the peripheral wall and protrudes toward a direction away from the peripheral wall;a step of setting the main body member in an injection molding die when the injection molding die is open, by using the openable and closable injection molding die for molding the cushion member;a step of fixing the main body member within the injection molding die, forming a molding cavity for molding the cushion member by the main body member and a molding die face formed inside the injection molding die to at least a portion of the main body member in the longitudinal direction, and allowing the through hole to communicate with the molding cavity, by closing the injection molding die; anda step of injecting the heated and melted elastic polymer material from an injection gate after the injection molding die is closed, molding the cushion member by making a portion of the elastic polymer material flow into and fill the molding cavity, and forming a filling portion that fills the hollow space by making a portion of the elastic polymer material flow into and fill the hollow space from the through hole. 2. A method for manufacturing a composite molded article which integrally includes: a main body member configured to be attached to a member to be attached, formed in an elongated shape from a polymer material having rigidity, and having a hollow space formed therein along a longitudinal direction thereof, and a cushion member formed from an elastic polymer material having a lower degree of hardness than the main body member, joined to an edge of the main body member, and having an elongated portion extending in the longitudinal direction along the edge, the method comprising: a step of preparing the main body member having at least one protruding portion on one surface of a peripheral wall surrounding the hollow space, the protruding portion protruding toward a direction away from the peripheral wall, having a root portion joined to the peripheral wall, and being configured to be broken at the root portion;a step of forming a through hole, which allows the hollow space to communicate with external air, in the peripheral wall, by breaking the protruding portion at the root portion after the molding of the main body member;a step of setting the main body member in an injection molding die when the injection molding die is open, by using the openable and closable injection molding die for molding the cushion member;a step of fixing the main body member within the injection molding die, forming a molding cavity for molding the cushion member by the main body member and a molding die face formed inside the injection molding die to at least a portion of the main body member in the longitudinal direction, and allowing the through hole to communicate with the molding cavity, by closing the injection molding die; anda step of injecting the heated and melted elastic polymer material from an injection gate after the injection molding die is closed, molding the cushion member by making a portion of the elastic polymer material flow into and fill the molding cavity, and forming a filling portion that fills the hollow space by making a portion of the elastic polymer material flow into and fill the hollow space from the through hole. 3. A method for manufacturing a composite molded article which integrally includes: a main body member configured to be attached to a member to be attached, formed in an elongated shape from a polymer material having rigidity, and having a hollow space formed therein along a longitudinal direction thereof; and a cushion member formed from an elastic polymer material having a lower degree of hardness than the main body member, joined to an edge of the main body member, and having an elongated portion extending in the longitudinal direction along the edge, the method comprising: a step of forming a first molding cavity by a molding die face formed inside a first injection molding die, by using the openable and closable first injection molding die for molding the main body member and closing the first injection molding die;a step of molding the main body member by filling the heated and melted polymer material into the first molding cavity from an injection gate after the injection molding die is closed and injecting a fluid into the inside of the polymer material to form the hollow space, and of molding at least one protruding portion on one surface of a peripheral wall of the main body member surrounding the hollow space, the protruding potion protruding toward a direction away from the peripheral wall, having a root portion joined to the peripheral wall, and being configured to be broken at the root portion;a step of forming a through hole, which allows the hollow space to communicate with external air, to the peripheral wall, by breaking the protruding portion at the root portion after the molding of the main body member;a step of setting the main body member in the second injection molding die when the second injection molding die is open, by using the openable and closable second injection molding die for molding the cushion member;a step of fixing the main body member within the second injection molding die, forming a second molding cavity for molding the cushion member by the main body member and a molding die face formed inside the second injection molding die to at least a portion of the main body member in the longitudinal direction, and allowing the through hole to communicate with the second molding cavity, by closing the second injection molding die; anda step of injecting the heated and melted elastic polymer material from an injection gate after the second injection molding die is closed, molding the cushion member by making a portion of the elastic polymer material flow into and fill the second molding cavity, and forming a filling portion that fills the hollow space by making a portion of the elastic polymer material flow into and fill the hollow space from the through hole. 4. The method for manufacturing a composite molded article according to claim 3, wherein, in the step of molding the protruding portion, a recess portion which is depressed closer to the hollow space than a rear face of the peripheral wall is molded, and the protruding portion is molded in a shape that protrudes from a bottom face of the recess portion. 5. The method for manufacturing a composite molded article according to claim 3, wherein, in the step of molding the protruding portion, the protruding portion is molded in a columnar shape and the recess portion is formed in a circular shape. 6. The method for manufacturing a composite molded article according to claim 5, wherein, in the step of molding the protruding portion, the protruding portion is molded such that a diameter of the protruding portion becomes smaller than a diameter of the recess portion. 7. The method for manufacturing a composite molded article according to claim 6, wherein, in the step of molding the protruding portion, the recess portion and the protruding portion are molded so as to be coaxial with each other. 8. The method for manufacturing a composite molded article according to claim 3, wherein the composite molded article has a first edge that faces a first portion of the member to be attached when being attached to the member to be attached, and a second edge that faces a second portion at a position different from the first portion,wherein the second molding cavity includes a cavity that molds the first edge, a cavity that molds the second edge, and a coupling channel that couples the first edge molding cavity and the second edge molding cavity,wherein the through hole is formed so as to communicate with the coupling channel, andwherein, in the step of molding the cushion member, the elastic polymer material flows into the hollow space from the coupling channel via the through hole. 9. The method for manufacturing a composite molded article according to claim 3, wherein a communication hole that allows the hollow space to communicate with the external air is formed at a position different from that of the through hole of the main body member, andwherein, in the step of molding the cushion member, the elastic polymer material flows into the hollow space from the through hole and gas within the hollow space is discharged to the outside from the communication hole. 10. The method for manufacturing a composite molded article according to claim 9, wherein the communication holes are formed at at least two locations, and the through hole is formed between the communication holes. 11. The method for manufacturing a composite molded article according to claim 9, wherein the communication hole is at least one of an injection hole and a discharge hole for the fluid that forms the hollow space in the step of molding the main body member. 12. The method for manufacturing a composite molded article according to claim 3, wherein a jig is used in the step of forming the through hole. 13. A composite molded article manufactured by the manufacturing method according to claim 3.
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이 특허에 인용된 특허 (6)
Gedritis, David Anthony; Bull, Kevin Allen, Gas-assisted two-shot injection molding process.
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