摘要

Abstract not available for EP3730277B1
Abstract of corresponding document: EP3730277A1

A lamination forming system includes a melt extruder (1), a nozzle head (21) and a carrier unit (3). The melt extruder (1) is configured to melt a plastic raw material into a plastic melt and to deliver the same. The nozzle head (21) includes a sprue channel (210) that has an inlet (212) connected to the melt extruder (1) for entry of the melt plastic into the sprue channel (210), and an outlet (213) disposed distally from the inlet (212) to deliver the plastic melt from the sprue channel (210). The carrier unit (3) includes a slide table (31) controllable to move relative to the nozzle head (21). The slide table (31) is configure to carry the plastic melt outputted from the nozzle head (21).

書目資料

申請日

2019/4/23

公告日

2022/1/12

申請號

EP19170701.7

公告號

EP3730277B1 公開 EP3730277A1

申請人

高雄科技大学; National Kaohsiung University of Science and Technology (TW);
台湾塑胶工业股份有限公司Formosa Plastics Corporation (TW)

發明人

黄俊钦;
李德文;
吴政龙;
康文浩;
翁英城

優先權

EP 20190170701 20190423

IPC

B29C 48/92(2019.01); B29C 48/255(2019.01); B29C 64/112(2017.01); B29C 64/118(2017.01); B29C 64/209(2017.01); B33Y 10/00(2015.01); B33Y 30/00(2015.01)

CPC

B33Y 30/00(2014.12); B29C 48/0021(2019.02); B29C 48/02(2019.02); B29C 48/05(2019.02); B29C 48/2556(2019.02); B29C 48/2694(2019.02); B29C 48/288(2019.02); B29C 48/301(2019.02); B29C 48/92(2019.02); B29C 64/118(2017.08); B29C 64/209(2017.08); B29C 64/245(2017.08); B29C 2948/92019(2019.02); B29C 2948/9238(2019.02); B29C 2948/92409(2019.02); B29C 2948/926(2019.02); B29C 2948/92904(2019.02); B33Y 10/00(2014.12)

類別碼

B1

專利範圍

1.A lamination forming system, comprising:
a melt extruder (1) configured to melt a plastic raw material, such as a plastic sheet, plastic powder, or plastic particles, into a plastic melt and to deliver the same;
a nozzle unit (2) including a nozzle head (21) including a sprue channel (210) that has an inlet (212) connected proximally to said melt extruder (1) for entry of the melt plastic into said sprue channel (210), and an outlet (213) disposed distally from said inlet (212) to deliver the plastic melt from said sprue channel (210); and
a carrier unit (3) including a slide table (31) controllable to move relative to said nozzle head (21), said slide table (31) being configured to carry the plastic melt outputted from said outlet(213) of said nozzle head (21);
wherein said sprue channel (210) further has a controlled sprue region (214) communicating said inlet (212) and said outlet (213) to receive the plastic melt, said outlet (213) connected to a bottom of said controlled sprue region (214), said nozzle head (21) further having a valve passage (211) that is connected to a top of said controlled sprue region (214) and that is smaller in cross section than said controlled sprue region (214), said inlet (212) being located at one side of said controlled sprue region (214) between said top and bottom of said controlled sprue region (214), said nozzle unit (2) further including a valve needle (22) extending downwardly through said valve passage (211) into said controlled sprue region (214), said controlled sprue region defining a melt flow passage that is formed around said valve needle (22) and that extends from said inlet (212) to said outlet (213), said valve needle (22) being controllable to move upward or downward within said controlled sprue region (214), a cross sectional area of said melt flow passage being varied when said valve needle (22) moves upward or downward;
wherein said melt extruder (1) includes a feed barrel (11) having a controlled temperature and connected to said inlet (212) of said nozzle head (21), a screw shaft (12) rotatably disposed within and extending axially along said feed barrel (11), and a drive module (13) driving rotation of said screw shaft (12) to extrude the plastic melt from said feed barrel (11);
wherein said melt extruder (1) further includes a pressure sensor (14) detecting pressure in said feed barrel (11), said lamination forming system further including a pressure monitor control module (41) that is configured to detect pressure in said controlled sprue region (214) of said sprue channel (210)
wherein said lamination forming system further includes a human interface module (42) electrically connected to said pressure monitor control module (41);
characterized in that the pressure monitor control module (41) is configured to control the movement of said valve needle (22); and wherein the pressure monitor control module (41) is configured to compare a pressure value detected by the pressure monitor control module (41) inside said sprue channel (210) to a pressure value detected by said pressure sensor (14) in said feed barrel (11) so as to obtain a pressure difference between said inlet (212) and said outlet (213), and an amount of the plastic melt delivered from said outlet (213) is controlled by controlling said pressure difference between said inlet (212) and said outlet (213).

2.The lamination forming system as claimed in Claim 1, characterized in that said bottom of said controlled sprue region (214) has a sprue tapered portion connected to said outlet (213), a top end of said sprue tapered portion disposed between said inlet (212) and said outlet (213), said valve needle (22) having a needle tapered end movable in a direction toward or away from said sprue tapered end.

3.The lamination forming system as claimed in Claim 1, characterized in that said carrier unit (3) further includes a triaxial drive mechanism (32) driving movement of said slide table (31), said human interface module (42) being electrically connected to said triaxial drive mechanism (32).