公开(公告)号：EP0624122B1

公开(公告)日：1998-06-10

申请号：EP93914512.4

申请日：1993-02-01

Applicant: HAYWOOD HOLDINGS LIMITED

Inventor： PEARSON, Terence Colwyn

IPC: B29C45/17

CPC classification number: B29C45/1736 ,  B29C45/1704 ,  B29C45/1734 ,  B29C45/174 ,  B29C2045/1741

Abstract: Injection moulding of plastic materials is a well known and practised process. There is also a well known group of processes referred to as ''gas-assisted injection moulding''. This invention concerns apparatus for and method of injecting the gas into injection mouldings at one ore more positions within an injection moulding tool so that the gas passes between shut-out faces (9) of the mould (1) at positions which are completely surrounded by plastic (10) during and after the mould filling cycle. The gas may be injected through porous sintered metal inserts located at the surface of the cavity of the mould. At the end of the cycle, gas can also be exhausted via the path of entry of the gas (4, 16). This invention covers advantageous methods of injecting the gas into the plastic compared with other existing known methods.

公开(公告)号：EP0593308A1

公开(公告)日：1994-04-20

申请号：EP93308251.3

申请日：1993-10-15

Applicant: ICP SYSTEMS, INC.

Inventor： Hendry, James Watson

IPC: B29C45/56 ,  B29C45/17

CPC classification number: B29C45/174 ,  B29C45/0025 ,  B29C45/561 ,  B29C2043/566 ,  B29C2045/1741

Abstract: A mold apparatus and method is used to form a solid injection molded plastic part having no internal voids, a Class A finish, a sink-free exterior appearance surface, and unevenly distributed structural detail extending from the opposite surface, the detail including free-standing reinforcement ribs, attachment bosses, and the like. In the method the mold portions (14,16) of the mold apparatus are closed, charges of molten thermoplastic and pressurized gas are sequentially injected into a mold cavity (18) defining the shape of the desired part, and the mold portions are sequentially separated and closed. The pressurized gas forces the hot plastic away from one mold half and against the other mold half, and separation of the mold portions ensures uniform distribution of the pressurized gas behind the hot plastic, which pressure is maintained during cooling. Depending on the application, the plastic completely packs the cavity, fills but does not pack the cavity, and the mating faces can be abutted or maintained partially separated when the mold portions reclosed. A gas seal is formed by the plastic to prevent gas in the mold cavity from reaching the finished exterior surface of the part during shrinkage of the plastic.

Abstract translation: 使用模具装置和方法来形成不具有内部空隙的固体注射成型塑料部件，A类表面，无凹槽的外观表面，以及从相对表面延伸的不均匀分布的结构细节，该细节包括独立的 加强肋，附接凸起等。 在该方法中，关闭模具装置的模具部分（14,16），熔融的热塑性塑料和加压气体的装料被顺序地注入限定所需部件形状的模腔（18）中，并且模具部分被依次分离 并关闭。 加压气体迫使热塑料远离一个半模并抵靠另一个半模，并且模具部分的分离确保加热气体在热塑料之后的均匀分布，该冷却期间保持该压力。 根据应用，塑料完全包装空腔，填充但不包封空腔，并且当模具部分重新闭合时，配合面可以邻接或保持部分分离。 气体密封由塑料形成，以防止模具腔中的气体在塑料收缩期间到达零件的成品外表面。

公开(公告)号：EP2647480A1

公开(公告)日：2013-10-09

申请号：EP13159682.7

申请日：2013-03-18

Applicant: Canon Kabushiki Kaisha

Inventor： Tobita, Shuusuke

IPC: B29C45/17 ,  B29C45/26 ,  B29D11/00 ,  G02B3/08

CPC classification number: B29D11/00269 ,  B29C45/1706 ,  B29C45/174 ,  B29C45/2632 ,  B29C2045/1702 ,  B29C2045/1741 ,  G02B1/041 ,  G02B3/08 ,  G02B5/1876

Abstract: A center-portion molding member (21) having a center-portion transfer shape surface (30) and a side wall surface (211) is inserted and fitted in a frame-portion molding member (38) having a frame-portion transfer shape surface (23) to form a part of a cavity (28). The center-portion molding member (21) has a groove portion (212) in the side wall surface (211). The groove portion (212) protrudes from the frame-portion transfer shape surface (23). Before injected resin transfers a shape of the center-portion transfer shape surface (30), the side wall surface (211) of the center-portion molding member (21) is sealed with the resin to form, between the center-portion transfer shape surface (30) and the resin, a space (39) in which gas is confined.

Abstract translation: 具有中心部分转印形状表面（30）和侧壁​​表面（211）的中心部分模制构件（21）插入并装配在框架部分模制构件（38）中，该框架模制构件具有框架部分转移形状表面 （23）以形成空腔（28）的一部分。 中心部分模制构件（21）在侧壁表面（211）中具有凹槽部分（212）。 槽部（212）从框部传递面（23）突出。 在注射树脂转移中心部分转移形状表面（30）的形状之前，中心部分模制构件（21）的侧壁表面（211）用树脂密封，以在中心部分转印形状表面 表面（30）和树脂，限制气体的空间（39）。

公开(公告)号：EP2279843A1

公开(公告)日：2011-02-02

申请号：EP09754610.5

申请日：2009-05-21

Applicant: Bridgestone Corporation

Inventor： HARAGUCHI, Hirokazu ,  OKUMURA, Masanori ,  ITABASHI, Taichi ,  IGARASHI, Masakazu

IPC: B29C39/28 ,  B29K75/00 ,  B29K105/04 ,  B29L31/58

CPC classification number: B29C44/58 ,  B29C44/351 ,  B29C45/2608 ,  B29C2045/14934 ,  B29C2045/1718 ,  B29C2045/1741 ,  B29C2045/2732

Abstract: A mold for foam molding which can sufficiently prevent burrs from being formed on a molded product, and a foam molding method using the mold are provided. A groove 6 into which a packing seal is to be fitted is formed in a mating surface 3a of a lower mold 3 so as to extend around a cavity 7. The groove 6 has a deep groove portion 6a which is deeply recessed from the mating surface 3a, and a shallow groove portion 6b which is located on the cavity 7 side with respect to the deep groove portion 6a and which continues to the deep groove portion 6a. A portion of the mating surface 3a that extends from its edge on the cavity 7 side down to the groove 6 has a width "a" of from 0.1 mm to 10 mm. A packing seal 5 has a base portion 5a which is inserted into the deep groove portion 6a, and an overhang portion 5b which continues to the base portion 5a and is engaged with the shallow groove portion 6b.

Abstract translation: 提供一种能够充分防止在模制品上形成毛刺的发泡成型用模具，使用该模具的发泡成型方法。 在下模3的配合表面3a中形成有要装配填料密封件的槽6，以便围绕空腔7延伸。槽6具有从配合表面深度凹陷的深槽部分6a 3a和浅槽部分6b，其相对于深槽部分6a位于空腔7侧，并且延伸到深槽部分6a。 从空腔7侧的边缘向槽6延伸的配合面3a的一部分宽度“a”为0.1mm〜10mm。 填料密封件5具有插入深槽部6a的基部5a和与基部5a连续并与浅槽部6b接合的突出部5b。

公开(公告)号：EP0624122A1

公开(公告)日：1994-11-17

申请号：EP93914512.0

申请日：1993-02-01

Applicant: HAYWOOD HOLDINGS LIMITED

Inventor： PEARSON, Terence Colwyn

IPC: B29C45

CPC classification number: B29C45/1736 ,  B29C45/1704 ,  B29C45/1734 ,  B29C45/174 ,  B29C2045/1741

Abstract: Le moulage par injection de matériaux en plastique est un procédé connu. Il existe également un groupe de procédés connus dénommé ''moulage par injection assisté par gaz''. L'invention se rapporte à un dispositif et à un procédé d'injection de gaz dans des moulages par injection sur une ou plusieurs positions à l'intérieur d'un instrument de moulage par injection, de façon que le gaz passe entre des faces fermées (9) du moule (1) à des positions totalement entourées par le plastique (10) pendant et après le cycle de remplissage du moule. On peut injecter le gaz à travers des insertions en métal poreux fritté situé à la surface de la cavité du moule. A la fin du cycle, on peut également évacuer le gaz par l'intermédiaire du trajet d'entrée du gaz (4, 16). L'invention regroupe des procédés avantageux d'injection du gaz dans le plastique par rapport à d'autres procédés correspondant à l'état actuel de la technique.

公开(公告)号：EP3228434A1

公开(公告)日：2017-10-11

申请号：EP15856795.8

申请日：2015-07-02

Applicant: Suzuki, Yasuhiro

Inventor： Suzuki, Yasuhiro

IPC: B29C45/57 ,  B29C45/40

CPC classification number: B29C45/401 ,  B29C45/0025 ,  B29C45/1734 ,  B29C45/174 ,  B29C45/2673 ,  B29C45/34 ,  B29C45/40 ,  B29C45/57 ,  B29C2045/1741 ,  B29C2045/4015 ,  B29C2045/4052

Abstract: [Problem]The present invention relates to a manufacturing method for obtaining a molded article having an expanded layer in the molded article, wherein an expanding agent and device used to manufacture a resin having expansion properties, and a means for increasing expansion ratio are provided.
[Solution] In the present invention, an expanding agent placed in a heating cylinder of a molding machine is configured as a liquid, the volume of the expanding agent is controlled, and the expanding agent is injected into a molten resin in the heating cylinder of the molding machine. The volume of the injected expanding agent can thereby be accurately measured each time. When a low-boiling liquid such as water, an alcohol, or an ether is used as the injected expanding agent, all of the liquid is vaporized by the temperature of the heating cylinder of the molding machine, and no residue thereof is therefore left in the molded article. When sodium bicarbonate water is used as the injected expanding agent, solvent water vaporizes and water vapor also becomes expandable gas, which is less expensive than using sodium bicarbonate as the expanding agent for a master batch using the resin that is to be molded.

Abstract translation: 本发明涉及获得在成形品中具有发泡层的成形体的制造方法，其中，设置用于制造具有发泡性的树脂的发泡剂和装置，以及提高发泡倍率的手段。 [解决方案]在本发明中，将放置在成型机的加热缸中的发泡剂构造为液体，控制发泡剂的体积，并将发泡剂注入到加热缸中的熔融树脂中 成型机。 由此可以准确地测量每次注入的膨胀剂的体积。 当使用诸如水，醇或醚的低沸点液体作为注入的发泡剂时，所有的液体都在成型机的加热缸的温度下汽化，因此不留下其残留物 模制品。 当使用碳酸氢钠作为注入的膨胀剂时，溶剂水蒸发并且水蒸气也变成可膨胀气体，这比使用碳酸氢钠作为用于使用待模塑的树脂的母料的膨胀剂便宜。

公开(公告)号：EP0593308B1

公开(公告)日：1998-07-22

申请号：EP93308251.3

申请日：1993-10-15

Applicant: ICP SYSTEMS, INC.

Inventor： Hendry, James Watson

IPC: B29C45/56 ,  B29C45/17

CPC classification number: B29C45/174 ,  B29C45/0025 ,  B29C45/561 ,  B29C2043/566 ,  B29C2045/1741

公开(公告)号：EP0624121A1

公开(公告)日：1994-11-17

申请号：EP93914510.0

申请日：1993-02-01

Applicant: HAYWOOD HOLDINGS LIMITED

Inventor： PEARSON, Terence Colwyn

IPC: B29C45

CPC classification number: B29C45/174 ,  B29C2043/566 ,  B29C2045/1741

Abstract: On modifie un procédé de moulage par injection classique afin d'améliorer la qualité du moulage par rapport à la finition de surface sur l'un des côtés du moulage (1.16), de réduire les contraints de moulage et, de ce fait, de diminuer les tendances au gondolement, ainsi qu'afin d'augmenter les possibilités d'apport de caractéristiques décoratives supplémentaires. Ceci s'effectue au moyen de l'injection d'une quantité régulée de gaz dans la cavité du moule, de façon à constituer une pellicule (1.11) ou une couche de gaz entre un côté de la cavité du moule (1.12) et la pellicule contiguë de plastique sensiblement fondu (1.13) pendant ou après le remplissage du moule avec le plastique. Ceci permet au gaz d'exercer une pression sur le plastique, la pression dudit gaz étant régulée à partir d'une source extérieure (1.15). L'invention comprend des procédés de scellement du gaz à l'intérieur du moule, de façon à empêcher des fuites, ce qui permet de réguler la pression du gaz. L'invention comprend également des procédés servant à réaliser des saillies localisées par pression à partir de la paroi générale du moulage, telle que des piliers, des bosses, des nervures.

公开(公告)号：EP2279843A4

公开(公告)日：2015-06-03

申请号：EP09754610

申请日：2009-05-21

Applicant: BRIDGESTONE CORP

Inventor： HARAGUCHI HIROKAZU ,  OKUMURA MASANORI ,  ITABASHI TAICHI ,  IGARASHI MASAKAZU

IPC: B29C39/28 ,  B29C44/34 ,  B29C44/58 ,  B29C45/14 ,  B29C45/17 ,  B29C45/26 ,  B29C45/27 ,  B29K75/00 ,  B29K105/04 ,  B29L31/58

CPC classification number: B29C44/58 ,  B29C44/351 ,  B29C45/2608 ,  B29C2045/14934 ,  B29C2045/1718 ,  B29C2045/1741 ,  B29C2045/2732

Abstract: A mold for foam molding which can sufficiently prevent burrs from being formed on a molded product, and a foam molding method using the mold are provided. A groove 6 into which a packing seal is to be fitted is formed in a mating surface 3a of a lower mold 3 so as to extend around a cavity 7. The groove 6 has a deep groove portion 6a which is deeply recessed from the mating surface 3a, and a shallow groove portion 6b which is located on the cavity 7 side with respect to the deep groove portion 6a and which continues to the deep groove portion 6a. A portion of the mating surface 3a that extends from its edge on the cavity 7 side down to the groove 6 has a width "a" of from 0.1 mm to 10 mm. A packing seal 5 has a base portion 5a which is inserted into the deep groove portion 6a, and an overhang portion 5b which continues to the base portion 5a and is engaged with the shallow groove portion 6b.

公开(公告)号：EP2514578B1

公开(公告)日：2014-03-26

申请号：EP12002783.4

申请日：2012-04-20

Applicant: Sumitomo Heavy Industries, Ltd.

Inventor： Tokunou, Ryuichi

IPC: B29C44/10 ,  B29C44/58 ,  B29C45/17 ,  B29C45/34 ,  B29C33/10 ,  B29K105/04

CPC classification number: B29C45/174 ,  B29C33/10 ,  B29C44/105 ,  B29C44/351 ,  B29C44/42 ,  B29C44/588 ,  B29C45/34 ,  B29C45/401 ,  B29C2045/1741 ,  B29K2105/04