公开(公告)号：EP0519928B1

公开(公告)日：1995-12-20

申请号：EP91901943.0

申请日：1990-12-21

申请人： PLM AB

发明人： NILSSON, Torsten

IPC分类号： B29C71/02 ,  B29C35/02 ,  B29C43/52

CPC分类号： B29C71/0063 ,  B29C33/02 ,  B29C51/08 ,  B29C71/02 ,  B29L2031/7132

摘要： A method and an apparatus to thermocrystallize amorphous thermoplastic material in a bottom portion (11) of a preform (10) while producing a container. By means of at least one heating device (20, 30) the plastic material is heated to an elevated temperature at which the material crystallizes thermally. The supply of energy is discontinued once the material crystallizes at a speed entailing that the thus released effect corresponds to or exceeds that effect which departs from the material undergoing crystallization. The apparatus includes a mandrel (26) having a forming surface (24) which at an increased temperature is brought into abutment against a defining surface (18) of the bottom portion. The forming surface has a curvature which deviates from the curvature of the defining surface (18) so that during the initial phase of the abutment the forming surface is abutting against the defining surface only in a central area thereof. On continued displacement of material in the bottom portion in order to form the portion the size of the central area is continuously increased until such time as substantially all thermoplastic material intended for temperature-conditioning abuts against the forming surfaces.

公开(公告)号：EP0400116B1

公开(公告)日：1993-05-26

申请号：EP89912511.6

申请日：1989-11-14

申请人： PLM AB

发明人： NILSSON, Torsten

IPC分类号： B29C35/02 ,  B29C51/42

CPC分类号： B29C55/30 ,  B29B13/024 ,  B29C49/6409 ,  B29L2023/22 ,  Y10S264/65 ,  Y10S264/73 ,  Y10S425/01 ,  Y10S425/014 ,  Y10S425/039

摘要： The invention relates to a method for temperature conditioning a blank (10) of plastic material, a conditioning mandrel (20) being placed within the blank (10) and thereafter expanded to reliable abutment against the inner surface of the blank. The mandrel is thereafter displaced back to its starting position. The outer surface of the mandrel is adjusted to and maintained at a certain temperature, whereby, during the abutment, an energy exchange takes place between the blank and the mandrel for adjusting the material temperature of the blank. At high temperatures of the mandrel, the mandrel is displaced out of the blank after such short time that the plastic material in the region of the abutment surface never passes the critical temperature at which tacking between the plastic material and/or thermal crystallization of the plastic material occurs to any appreciable degree. As a rule, this process is repeated one or more times. In an apparatus according to the invention, the dimensions of the conditioning mandrel (20) and the blank (10) are adapted to one another such that, in the position within the blank, the outer surface of the conditioning mandrel abuts, after expansion, against the inner surface of the blank. Control and regulation means are provided for abutment of the conditioning mandrel against the inner surface of the blank during an adjustable time interval.

公开(公告)号：EP0552212B1

公开(公告)日：1996-11-13

申请号：EP91917646.1

申请日：1991-09-23

申请人： PLM AB

发明人： NILSSON, Torsten

IPC分类号： B29C55/22

CPC分类号： B29C55/30 ,  B29L2031/712 ,  B29L2031/716

摘要： The present invention relates to a method and an apparatus for orienting amorphous plastic material in that the material is caused to be displaced through a gap with a smallest gap width less than the material thickness of the plastic material. During such displacement, the material is oriented, under the formation of a transition zone (18) between as yet unoriented (thicker) material (16b) and oriented (thinner) material (16a). The material is displaced at a speed entailing that crystallization energy released on the orientation reaches the defining surfaces (14, 17) of the plastic material at a point in time when the material has already assumed its reduced thickness. The apparatus includes a drawing ring (50) and a mandrel (60), between which the gap is formed. When the plastic material enters into the gap, the gap is of a width which substantially corresponds to the material thickness of the amorphous material. In the direction of displacement of the plastic material, the gap width is reduced so as to be less than the material thickness of the amorphous material, but exceed the material thickness of the oriented material.

公开(公告)号：EP0400116A1

公开(公告)日：1990-12-05

申请号：EP89912511.0

申请日：1989-11-14

申请人： PLM AB

发明人： NILSSON, Torsten

IPC分类号： B29C35 ,  B29B13 ,  B29C49 ,  B29C51 ,  B29C55

CPC分类号： B29C55/30 ,  B29B13/024 ,  B29C49/6409 ,  B29L2023/22 ,  Y10S264/65 ,  Y10S264/73 ,  Y10S425/01 ,  Y10S425/014 ,  Y10S425/039

摘要： Procédé pour régler la température d'une ébauche (10) de matière plastique, un mandrin de réglage (20) étant placé à l'intérieur de l'ébauche (10) puis élargi jusqu'à se trouver en contact étroit avec la surface intérieure de l'ébauche. Le mandrin reprend ensuite sa position initiale. La surface extérieure du mandrin est réglée sur une température donnée et maintenue à cette température; un échange de chaleur se produit donc lors de la mise en contact entre l'ébauche et le mandrin et la température de la matière de l'ébauche est ainsi ajustée. Lorsque la température du mandrin est élevée, on le retire très rapidement de l'ébauche pour que la température de la matière plastique dans la région de la surface de contact ne dépasse jamais le niveau critique où elle se mettrait à coller de manière significative et/ou subirait une cristallisation thermique sensible. On répète en règle générale cette opération une ou plusieurs fois. Dans un appareil selon la présente invention, les dimensions du mandrin de réglage (20) et de l'ébauche (10) sont coordonnées entre elles afin que, lorsque le mandrin est positionné à l'intérieur de l'ébauche, sa surface extérieure, après élargissement, entre en contact avec la surface intérieure de l'ébauche. Des moyens de commande et de réglage sont prévus qui permettent de mettre en contact le mandrin de réglage avec la surface interne de l'ébauche pendant un intervalle de temps réglable.

公开(公告)号：EP0552212A1

公开(公告)日：1993-07-28

申请号：EP91917646.0

申请日：1991-09-23

申请人： PLM AB

发明人： NILSSON, Torsten

IPC分类号： B29C55 ,  B29L23

CPC分类号： B29C55/30 ,  B29L2031/712 ,  B29L2031/716

摘要： Méthode et appareil servant à orienter une matière plastique amorphe. On fait passer la matière par un trou ayant une largeur inférieure à l'épaisseur de la matière plastique. Durant ce déplacement, la matière est orientée, au cours de la formation d'une zone de transition (18) entre une matière encore non orientée (plus épaisse) (16b) et une matière orientée (plus mince) (16a). La matière est déplacée à une vitesse qui a pour effet que l'énergie de cristallisation dégagée par l'orientation atteint les surfaces extérieures (14, 17) de la matière plastique à un moment où la matière se trouve déjà à l'état d'épaisseur réduite. L'appareil comprend un anneau d'étirage (50) et un mandrin (60) entre lesquels un trou est formé. Quand la matière plastique entre dans le trou, le trou a une largeur qui correspond sensiblement à l'épaisseur de la matière amorphe. La largeur du trou est réduite dans le sens du déplacement de la matière plastique de manière à être inférieure à l'épaisseur de la matière amorphe, mais supérieure à l'épaisseur de la matière orientée.

公开(公告)号：EP0204810B1

公开(公告)日：1989-08-23

申请号：EP86900323.6

申请日：1985-12-09

申请人： PLM AB

发明人： NILSSON, Torsten

IPC分类号： B29C55/26

CPC分类号： B29C57/00 ,  B29C49/08 ,  B29C49/18 ,  B29C49/48 ,  B29C49/76 ,  B29C55/30 ,  B29C2049/0089 ,  B29C2049/4858 ,  B29C2049/4892 ,  B29K2105/258 ,  Y10S264/904

摘要： A hollow body (e.g. a container) as well as a method and an apparatus for its manufacture in which an axially directed wall of the body primarily comprises oriented and/or crystallised plastics material. A tubular preform (10d) is fixed in a circumferential region (13d) in the vicinity of the mouth edge (14d) of the preform between mechanical forming devices (30, 40), after which the devices, during continued clamping of the circumferential region, are displaced in the axial direction of the preform relative to a mandrel (50). Thus, the mandrel is displaced into the preform during simultaneous expansion thereof and the material is oriented and/or crystallised. In a preferred embodiment there is made a certain compensation of the stretching forces, which arise in the material when inserting the mandrel, by applying a force to the bottom of the preform by a bottom support (75).

公开(公告)号：EP0190191B1

公开(公告)日：1988-09-28

申请号：EP85903424.1

申请日：1985-06-17

申请人： PLM AB

发明人： NILSSON, Torsten

IPC分类号： B29C55/26

CPC分类号： B29C55/30 ,  B29C43/361 ,  B29C43/42 ,  B29C2043/3618 ,  B29C2043/3631

摘要： A method of producing a container of plastic material capable of being oriented and/or crystallised, in which a substantially tubular blank is, in at least two mutually consecutive and mutually separate shaping phases or shaping stages, reshaped into the container. The blank is reshaped into the container in that mechanical forming elements (34, 42) stretch the material in the axial direction of the blank, and in the circumferential direction of the blank. By stretching the material in each separate shaping stage to a regulated degree, there will be accumulated in the material a total stretching corresponding to the requisite stretching in order to impart to the material the desired and predetermined orientation and thereby the requisite strength properties.