Global Patent Index - EP 0988138 A1

EP 0988138 A1 2000-03-29 - METHOD AND DEVICE FOR THE INJECTION MOULDING OF A PLASTIC BODY WITH AN INTERNAL THREAD

Title (en)

METHOD AND DEVICE FOR THE INJECTION MOULDING OF A PLASTIC BODY WITH AN INTERNAL THREAD

Title (de)

VERFAHREN UND VORRICHTUNG ZUM SPRITZGIESSEN EINES KUNSTSTOFFKÖRPERS MIT INNENGEWINDE

Title (fr)

PROCEDE ET DISPOSITIF DE MOULAGE PAR INJECTION D'UN CORPS EN MATIERE PLASTIQUE A FILET INTERIEUR

Publication

EP 0988138 A1 (DE)

Application

EP 98938604 A

Priority

  • DE 19724204 A
  • EP 9803361 W

Abstract (en)

[origin: DE19724204A1] The invention relates to a method and a device, for the injection moulding of a plastic body with an internal thread, preferably a screw cap. The plastic body is injection moulded in a mould cavity of a tool. A core (50), comprising an external thread (49) which is complementary to said internal thread, is arranged in the mould cavity. The internal thread and the external thread are formed from thread segments or thread sections (51a 51d) distributed over the periphery thereof with axially running gaps, or gap sections (52a 52d) between them. The injected plastic body is removed from the core (50). The region of the gap sections (52a 52d) is filled before the injection of the plastic with removable packing bodies, in particular, sliding bodies (53a 53b). The packing bodies are removed from the gap sections (52a 52d) after the injection of the plastic. The core (50) and/or the plastic body are rotated relative to the other about the axis (14) of the thread (49), such that the thread sections (51a 51d) correspond to the gaps. The plastic body is then removed axially from the core.

IPC 1-7 (main, further and additional classification)

B29C 45/26

IPC 8 full level (invention and additional information)

B29C 33/48 (2006.01); B29C 45/26 (2006.01)

CPC (invention and additional information)

B29C 45/2681 (2013.01); B29C 33/485 (2013.01); B29C 45/2622 (2013.01); B29C 2045/4485 (2013.01); B29L 2031/565 (2013.01)

Citation (search report)

See references of WO 9856558A1

Designated contracting state (EPC)

AT BE CH DE DK ES FR GB IT LI NL SE

EPO simple patent family

DE 19724204 A1 19981210; EP 0988138 A1 20000329; JP 2002503163 A 20020129; WO 9856558 A1 19981217; WO 9856558 A8 20050324

INPADOC legal status


2005-05-25 [RTI1] TITLE (CORRECTION)

- Ref Legal Event Code: RTI1

- Free Format Text: METHOD AND DEVICE FOR THE INJECTION MOULDING OF A PLASTIC BODY WITH AN INTERNAL THREAD

2002-08-28 [18D] DEEMED TO BE WITHDRAWN

- Ref Legal Event Code: 18D

- Effective date: 20020219

2001-09-19 [17Q] FIRST EXAMINATION REPORT

- Ref Legal Event Code: 17Q

- Effective date: 20010807

2000-03-29 [17P] REQUEST FOR EXAMINATION FILED

- Ref Legal Event Code: 17P

- Effective date: 19991210

2000-03-29 [AK] DESIGNATED CONTRACTING STATES:

- Ref Legal Event Code: AK

- Designated State(s): AT BE CH DE DK ES FR GB IT LI NL SE