EP0081883A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
A method and apparatus for moulding a socket to a plastic tube
Assignee: Wavin BV
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Filing: 1982-12-09
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Granted: —
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Expires: 2002-12-09
Abstract
Abstract A socket 3 is moulded to a thermoplastic tube 7 by heating a portion 14 of a plastic tube 7 to the deformation temperature and after having placed this portion 14 in a mould 1, said portion is subjected to a gaseous wave of about 30 atm. which strikes said portion in less than 0,2 seconds against the mould wall of a mould space 2 corresponding with the shape of the socket 3. The still hot socket 3 is cooled without any support under ambient conditions. An apparatus for forming said socket comprises a mould 1 with a mould space 2 and a compressor 16 for obtaining said gaseous wave.
Inventors
- 👤 Hendrik Cancrinus
- 👤 Wilhelmus F. T. C. Olderaan
- 👤 Warner Jan De Putter
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-27 11:12
CPC Classifications
B; B29; B29C; B29C49/00; B29C49/42; B29C49/46; B29C57/00; B29C57/02; B29C57/08; B29C2049/4602; B29C2049/465; B29C2049/4673; B29C2049/4698; B29C2949/00; B29C2949/07; B29C2949/079; B29C2949/08; B29K; B29K2105/00; B29K2105/25; B29K2105/253; B29K2105/258; B29L; B29L2023/00; B29L2023/22
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
76 words
A method of moulding a socket to a plastic tube by placing a portion of a plastic tube (7) opposite a mould wall and bringing said portion of a plastic tube in contact with the mould wall (10) by means of a fluid pressure, characterized in that a fluid pressure wave acting upon the portion (14) of the plastic tube to be deformed substantially instantaneously strikes the portion to be deformed against the mould wall (10).
Claim 2
Independent Claim
76 words
A method of moulding a socket to a plastic tube by placing a portion of a plastic tube (7) opposite a mould wall and bringing said portion of a plastic tube in contact with the mould wall (10) by means of a fluid pressure, characterized in that a fluid pressure wave acting upon the portion (14) of the plastic tube to be deformed substantially instantaneously strikes the portion to be deformed against the mould wall (10).
Claim 3
Dependent Claim
35 words
A method according to claim 1, characterized in that a fluid pressure wave strikes the portion to be deformed against the mould wall in less than 0,2 sec., more preferably in less than 0,02 sec.
Claim 4
Dependent Claim
35 words
Method according to claim 2, characterized in that the portion to be deformed is heated to at least 50°C, more preferably to over approximately 75 0 C and in case of polypropylene, to over 135°C.
Claim 5
Dependent Claim
31 words
Method according to claim 2, characterized in that the portion to be deformed is heated to at least the glass transition temperature, preferably to the deformation temperature of the respective plastic.
Claim 6
Dependent Claim
58 words
Method according to claim 1, characterized in that a preferably gaseous fluid pressure wave is used, derived from a fluid having a pressure of at least 10 atm., more preferably a pressure of over 25 atm., while the inner side of the mould wall is in open connection with the outside by means of one or more openings.
Claim 7
Dependent Claim
53 words
Method according to claim 5, characterized in that the fluid pressure wave acts upon said portion (6) to be deformed in such a manner than an end portion (6) to be deformed, in conjunction with the mould wall, seals an opening or all the openings at the action of a fluid pressure wave.
Claim 8
Dependent Claim
28 words
A method according to claim 6, characterized in that the deformed portion is removed from the mould wall immediately after its deformation and cooled in a free position.
Claim 9
Dependent Claim
16 words
Method according to claim 1, characterized in that the plastic is a thermoplastic, particularly a polyolefin.
Claim 10
Independent Claim
24 words
A method according to claims 1 to 8, characterized in that the mould wall is corrugated and thus the socket (6) is provided with-corrugations.
Claim 11
Independent Claim
30 words
A method according to claims 1-9, characterized in that a tube (7) is provided with a plurality of widenings and thereafter said widening is cut along a separation line (20).
Claim 12
Dependent Claim
103 words
Apparatus for moulding a socket to a plastic tube by means of a method according to claim 1, comprising an optionally movable mould (1) with a mould space (2) for moulding a socket (3) to a plastic tube (7) and means (16) for creating a fluid pressure in a region opposite the wall of the mould space (2), characterized in that the apparatus is provided with means (13, 16) for having a fluid pressure wave act upon a portion of a plastic tube to be deformed, said pressure wave substantially instantaneously striking the portion (14) to be deformed against the mould wall (1c).
Claim 13
Dependent Claim
72 words
Plastic tube, preferably a thermoplastic tube, provided with a socket obtained by deforming at least a portion of a plastic tube and pressing same against a mould wall by the action of a fluid pressure characterized in that the deformation has been effected by a fluid pressure wave so acting upon a portion of the plastic tube to be deformed that said portion will substantially instantaneously be struck against a mould wall.
Claim 14
Dependent Claim
72 words
Plastic tube, preferably a thermoplastic tube, provided with a socket obtained by deforming at least a portion of a plastic tube and pressing same against a mould wall by the action of a fluid pressure characterized in that the deformation has been effected by a fluid pressure wave so acting upon a portion of the plastic tube to be deformed that said portion will substantially instantaneously be struck against a mould wall.
References Cited (Backward Citations)
No citation records indexed.
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