Molded part, manufacturing method of molded part and mold

Patent metadata

Field	Value
Publication number	US-2016346971-A1
Application number	US-201615156578-A
Country	US
Kind code	A1
Filing date	May 17, 2016
Priority date	May 25, 2015
Publication date	Dec 1, 2016
Grant date	—

Abstract

A molded part including a first member having a plurality of openings and a second member contacting with a peripheral edge of each of the plurality of openings so as to cover the openings, and having a hollow portion formed by sealing the contact portion with a sealing material, wherein: the second member defines a flow channel for filling the sealing material between the first member and the second member; the second member has a branched shape in which sections corresponding to positions covering the plurality of openings are branched from each other, and portions near a gate of the flow channel are connected as a common section; and the branched shape has a bridge structure for connecting the respective branched sections.

First claim

What is claimed is:

1 . A molded part, comprising a first member having a plurality of openings and a second member contacting with a peripheral edge of each of said plurality of openings so as to cover said openings, and having a hollow portion formed by sealing the contact portion with a sealing material, wherein:
said second member defines a flow channel for filling said sealing material between said first member and the second member; said second member has a branched shape in which sections corresponding to positions covering said plurality of openings are branched from each other, and portions near a gate of said flow channel are connected as a common section; and said branched shape has a bridge structure for connecting the respective branched sections.

2 . The molded part according to claim 1 , wherein said bridge structure is arranged closer to said gate than an intermediate portion between said gate and a final filling portion of said sealing material in said flow channel.

3 . The molded part according to claim 1 , wherein: said molded part is a liquid supply member of an inkjet print head capable of ejecting liquid from a plurality of ejection ports; and said hollow portion is a supply channel through which the liquid is supplied to said inkjet print head.

4 . A manufacturing method of a molded part, the molded part comprising a first member having a plurality of openings and a second member contacting with a peripheral edge of each of said plurality of openings so as to cover said openings, and having a hollow portion formed by sealing the contact portion with a sealing material, wherein: said second member defines a flow channel for filling said sealing material between said first member and the second member; said second member has a branched shape in which sections corresponding to positions covering said plurality of openings are branched from each other, and portions near a gate of said flow channel are connected as a common section; and said branched shape has a bridge structure for connecting the respective branched sections,
the manufacturing method including: a first step of forming each of said first member and said second member through injection molding; a second step of bringing said first member and said second member into contact with each other; and a third step of filling a sealing material into a contact portion between said first member and said second member and joining said first member and said second member through injection molding, wherein: said first to third steps are sequentially executed in a same mold; and said mold is configured in said third step to have a piece disposed in contact with said sealing material filled in said contact portion, and to be capable of temperature control.

5 . A mold used for a manufacturing method of a molded part, the molded part comprising a first member having a plurality of openings and a second member contacting with a peripheral edge of each of said plurality of openings so as to cover said openings, and having a hollow portion formed by sealing the contact portion with a sealing material, wherein: said second member defines a flow channel for filling said sealing material between said first member and the second member; said second member has a branched shape in which sections corresponding to positions covering said plurality of openings are branched from each other, and portions near a gate of said flow channel are connected as a common section; and said branched shape has a bridge structure for connecting the respective branched sections,
the manufacturing method including: a first step of forming each of said first member and said second member through injection molding; a second step of bringing said first member and said second member into contact with each other; and a third step of filling a sealing material into a contact portion between said first member and said second member and joining said first member and said second member through injection molding, wherein: said first to third steps are sequentially executed in a same mold; and said mold is configured in said third step to have a piece disposed in contact with said sealing material filled in said contact portion, and to be capable of temperature control.

Assignees

• Canon Kk

Inventors

• Iwano Takuya
• Yamaguchi Yukuo
• Umeyama Mikiya
• Oikawa Satoshi
• Amma Hiromasa
• Kimura Satoshi
• Tsujiuchi Naoko
• Iijima Yasushi
• Toda Kyosuke

Classifications

• B29C45/0062 Primary

  Joined by injection moulding · CPC title

• B29L2031/767

  Printing equipment or accessories therefor · CPC title

• B29C45/33

  having transversely, e.g. radially, movable mould parts · CPC title

• B29C2045/2683

  Plurality of independent mould cavities in a single mould · CPC title

• B29C2045/0063

  facing before assembling, i.e. bringing the parts opposite to each other before assembling · CPC title