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1. (WO1991005649) PRODUCTION METHOD FOR RUBBER PLUG FOR VIAL
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/1991/005649 International Application No.: PCT/JP1990/001359
Publication Date: 02.05.1991 International Filing Date: 20.10.1990
IPC:
B29C 43/14 (2006.01) ,B29C 43/18 (2006.01) ,B29C 43/20 (2006.01) ,B29C 70/78 (2006.01)
B PERFORMING OPERATIONS; TRANSPORTING
29
WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
C
SHAPING OR JOINING OF PLASTICS; SHAPING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL; AFTER- TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
43
Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
02
of articles of definite length, i.e. discrete articles
14
in several steps
B PERFORMING OPERATIONS; TRANSPORTING
29
WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
C
SHAPING OR JOINING OF PLASTICS; SHAPING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL; AFTER- TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
43
Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
02
of articles of definite length, i.e. discrete articles
18
incorporating preformed parts or layers, e.g. compression moulding around inserts or for coating articles
B PERFORMING OPERATIONS; TRANSPORTING
29
WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
C
SHAPING OR JOINING OF PLASTICS; SHAPING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL; AFTER- TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
43
Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
02
of articles of definite length, i.e. discrete articles
20
Making multilayered or multicoloured articles
B PERFORMING OPERATIONS; TRANSPORTING
29
WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
C
SHAPING OR JOINING OF PLASTICS; SHAPING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL; AFTER- TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
70
Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
68
by incorporating or moulding on preformed parts, e.g. inserts, layers
78
Moulding material on one side only of the preformed part
Applicants:
NISSHO CORPORATION [JP/JP]; 9-3, Honjo-nishi 3-chome Kita-ku, Osaka-shi Osaka 531, JP (AllExceptUS)
MATSUZAKI, Masaru [JP/JP]; JP (UsOnly)
AOKI, Yoshihide [JP/JP]; JP (UsOnly)
Inventors:
MATSUZAKI, Masaru; JP
AOKI, Yoshihide; JP
Agent:
ASAHINA, Sohta ; NS Building 2-22, Tanimachi 2-chome Chuo-ku, Osaka-shi Osaka 540, JP
Priority Data:
1/27558023.10.1989JP
Title (EN) PRODUCTION METHOD FOR RUBBER PLUG FOR VIAL
(FR) PROCEDE DE PRODUCTION DE BOUCHONS EN CAOUTCHOUC POUR FIOLES
Abstract:
(EN) This invention relates to a production method for a rubber plug for a vial characterized in that a synthetic resin film is laminated on the leg side of a rubber plug. The production method comprises (i) a first formation step of superposing a synthetic resin film (1) resistant to medicines or to medical chemicals onto an unvulcanized rubber sheet (2) and pressing, heating and shaping them between moldes (A, B); a second formation step of putting an unvulcanized rubber sheet having substantially the same hole (10) as the root portion of the leg portion (4) of the resulting primary mold over the primary mold from its leg side and pressing, heating and shaping them by a pair of molds; and a step of cutting and removing fins around the resulting secondary mold. The production method of the present invention can mold the rubber plug portion and the synthetic resin laminate portion in one process. Furthermore, since the above steps can be carried out with the materials kept continuous in the sheet form, the method of the invention is particularly advantageous for the production of a large number of rubber plugs for vials.
(FR) Le procédé décrit, qui sert à la production de bouchons en caoutchouc pour fioles, se caractérise en ce qu'un film en résine synthétique est déposé en couche sur le côté des branches d'un bouchon en caoutchouc fourchu. Ce procédé de production comprend: (i) une première étape de formation qui consiste à superposer un film en résine synthétique (1) résistant aux médicaments ou aux substances chimiques médicales sur une feuille en caoutchouc non vulcanisée (2) puis à presser, chauffer et façonner conjointement ce film et cette feuille entre deux moules (A, B); une seconde étape de formation qui consiste à placer une feuille en caoutchouc non vulcanisée ayant sensiblement le même trou (10) que la partie de base de la partie des branches (4) de la pièce moulée primaire qui en résulte sur la pièce moulée primaire à partir du côté de ces branches, puis à presser, chauffer et façonner conjointement cette feuille et cette pièce moulée entre une paire de moules; et une étape de découpage et de retrait des bavures qui se sont formées autour de la pièce moulée secondaire produite. Ce procédé de production permet de mouler la partie de bouchon en caoutchouc et la partie de stratifié en résine synthétique en un seul procédé. En outre, étant donné que les étapes précitées peuvent être effectuées tandis que les matériaux utilisés sont maintenus en continu sous la forme de feuilles, ce procédé est particulièrement approprié pour la production d'un grand nombre de bouchons en caoutchouc pour fioles.
Designated States: US
European Patent Office (BE, CH, DE, FR, GB, IT, NL, SE)
Publication Language: Japanese (JA)
Filing Language: Japanese (JA)
Also published as:
EP0450098