WO2002081167A2 - Verfahren und vorrichtung zur herstellung eines elektrischen kunststoffisolators - Google Patents
Verfahren und vorrichtung zur herstellung eines elektrischen kunststoffisolators Download PDFInfo
- Publication number
- WO2002081167A2 WO2002081167A2 PCT/DE2002/001127 DE0201127W WO02081167A2 WO 2002081167 A2 WO2002081167 A2 WO 2002081167A2 DE 0201127 W DE0201127 W DE 0201127W WO 02081167 A2 WO02081167 A2 WO 02081167A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- casting mold
- core
- mold
- hollow core
- injection
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C39/00—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor
- B29C39/02—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor for making articles of definite length, i.e. discrete articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C39/00—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor
- B29C39/02—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor for making articles of definite length, i.e. discrete articles
- B29C39/021—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor for making articles of definite length, i.e. discrete articles by casting in several steps
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/0038—Moulds or cores; Details thereof or accessories therefor with sealing means or the like
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C39/00—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor
- B29C39/02—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor for making articles of definite length, i.e. discrete articles
- B29C39/10—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor for making articles of definite length, i.e. discrete articles incorporating preformed parts or layers, e.g. casting around inserts or for coating articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C39/00—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor
- B29C39/22—Component parts, details or accessories; Auxiliary operations
- B29C39/24—Feeding the material into the mould
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C31/00—Handling, e.g. feeding of the material to be shaped, storage of plastics material before moulding; Automation, i.e. automated handling lines in plastics processing plants, e.g. using manipulators or robots
- B29C31/04—Feeding of the material to be moulded, e.g. into a mould cavity
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/34—Electrical apparatus, e.g. sparking plugs or parts thereof
- B29L2031/3412—Insulators
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S264/00—Plastic and nonmetallic article shaping or treating: processes
- Y10S264/54—Processes in making insulators
Definitions
- the invention relates to a method and a device for producing an electrical plastic insulator, which has a centrally arranged core or hollow core, in particular made of glass fiber reinforced plastic, as well as a plurality of insulation shields arranged coaxially around the core or hollow core, which in the axial direction of the Core or hollow core are arranged offset.
- a method and an associated device for producing such a plastic insulator are known from DE-AS 2044179.
- a mold open at the top is arranged coaxially around a centrally arranged and vertically positioned core.
- the mold is then filled by pouring liquid silicone compound. With regard to its cavity, the shape has the contour that corresponds to the desired insulation screen.
- the casting mold is moved axially downward, namely by the amount that corresponds to the desired axial distance between two insulation shields.
- the individual insulation shields are cast in this way.
- the silicone mass from which the insulation shields are cast must have a relatively low viscosity, in particular equal to or less than 25,000 [mPa * s].
- the insulation screens In order for the insulation screens to have a surface that is favorable in terms of insulation, it is only possible to a very limited extent to add filling materials to the silicone compound. This significantly increases the cost of materials for the isolator.
- the invention is therefore based on the object of developing a method and an associated device of the type mentioned at the outset in such a way that it is also possible to process less expensive plastic materials, in particular silicone material, with a higher viscosity and still ensure that the cast insulation shields are of high quality , Furthermore, the method according to the invention is intended to achieve a shorter production time in the manufacture of an insulator.
- the aim is to reduce the average mold filling time by 60% to 80% compared to known processes.
- the mold for casting the insulation shields is positioned at a predetermined axial position of the vertically arranged core or hollow core.
- the casting mold encloses the core or hollow core with a coaxial opening, which is arranged in an axially lower region of the casting mold; the casting mold also has an open-topped mold area for forming an insulation screen.
- a sealing bond between the core or hollow core on the one hand and the casting mold on the other hand is then produced in an axially lower region of the casting mold. This is done, for example, by activating a seal.
- Liquid plastic material is then injected at a pressure which is higher than the ambient pressure in an axial region of the casting mold which lies axially above the sealing compound and axially below the upper end of the casting mold. This is done until the mold is filled with a predetermined volume of the plastic material.
- the injection of the plastic material takes place with an injection pressure that corresponds to at least 5 times the ambient pressure.
- the casting mold is preferably tempered, in particular heated, at least during the hardening step. This heating occurs in particular when using silicone as a plastic material to at least 60 ° C.
- the device for producing the electrical plastic insulator is distinguished according to the invention in that at least one injection element or injection channel for the pressure injection of liquid plastic material is arranged between the lower end of the axially lower region and the upper end of the casting mold.
- the injection element or the injection channel is preferably arranged in an axial region of the casting mold, in which the core or hollow core lies closely against the casting mold in a coaxial opening of the casting mold.
- the economy of manufacture can be further improved in that several injection elements or injection channels, preferably four, six or eight, are arranged uniformly distributed over the circumference of the casting mold.
- a seal for sealing the casting mold against the core or hollow core is preferably below the axial position of the Injection elements or the injection channels arranged.
- the seal can advantageously be activated or deactivated in a controllable manner, with pneumatic or hydraulic actuation in particular being considered.
- temperature control elements in particular heating elements, can be arranged in the mold region of the casting mold which is open at the top.
- the main idea of the novel method is that the production of an insulation screen by means of a casting mold is carried out in such a way that the plastic material, in particular the silicone material, is introduced from below into the casting mold, which is open at the top, under increased pressure. In a departure from the previously known method, the liquid plastic material is no longer poured into the open mold from above under ambient pressure.
- seamless insulation shields can be produced without any cast seam, the casting or silicone material being applied directly to the central core.
- Fig. 3 shows the same representation as Fig. 2, but with the seal activated.
- FIG. 1 An electrical plastic insulator 1 can be seen in FIG. 1. It consists of a centrally arranged hollow core 2, around which coaxial insulation screens 3 are arranged. The screens 3 are each arranged at a constant distance s from one another, which corresponds to the axial displacement path of the casting mold 4 described below. 2 shows the centrally arranged hollow core 2 of the plastic insulator 1, the axis of which is positioned vertically. The mold 4 is used to produce the individual insulation shields 3. The casting mold has a coaxial opening 5 which surrounds the hollow core 2.
- the casting mold 4 has a region 6 lying axially below, which essentially lies closely around the hollow core 2 with the coaxial opening 5 of the casting mold 4. Above the lower region 6, a mold region 7 of the casting mold 4 extends open axially. This molding region 7 has the actual cavity of the casting mold 4, which defines the shape of the insulation shield 3 to be cast.
- the casting mold 4 is moved downward with movement elements, not shown, with the hollow core 2 arranged vertically (see double arrow P in FIG. 3). After an insulation screen 3 has been produced, the casting mold 4 is moved downward by the axial displacement path s shown in FIG. 1. During the movement - as can be seen in FIG. 2 - the seal 13 is deactivated, which is provided in order to produce a firm sealing compound 8 (see FIG. 3) between the casting mold 4 and the hollow core 2.
- the casting mold 4 is preferably applied to the hollow core 2 by building up a hydraulic or pneumatic pressure in the seal 13.
- the sealing assembly 8 is thus produced, see FIG. 3.
- the sealing assembly 8 extends over the axial region 9, which can be seen in FIGS. 2 and 3.
- An injection element or injection channel 12 is arranged in the axial region 10 directly axially above the region 9 of the sealing composite 8. This area 10 is still in the axial area of the casting mold 4 which is essentially tight around the hollow core 2.
- Liquid silicone mass preferably with fillers, is injected into the mold 4 via the injection element or the injection channel 12.
- the mass can have a viscosity of at least up to 85000 [mPa * s], that is to say a value which is considerably higher than the viscosity value of 25000 [mPa * s] previously regarded as the limit value.
- So-called LSR silicones liquid silicone rubber
- the silicone material is injected at an injection pressure p e which is significantly above the ambient pressure p 0 .
- the injection pressure is at least 5 times the ambient pressure.
- the area of the injection point (s) 10, i. H. the axial point at which the injection element or the injection channel 12 is arranged is located between the lower end 15 of the region 6 of the casting mold 4 lying below and its upper end 11.
- heating elements 14 are arranged in the casting mold 4 in the vicinity of the cavity wall, which keep a temperature of at least 60 ° C. during the hardening.
- a plurality of injection elements or injection channels 12 are arranged over the circumference of the casting mold 4, which does not appear from FIGS. 1 to 3. Four, six or eight injection elements or injection channels 12 are preferably used.
- the individual injection elements or injection channels 12 can be supplied with silicone material from a coaxially arranged ring line.
- a rotation of the casting mold is not necessary in the method according to the invention. Because the form rotation is eliminated, the silicone can be fed through the injection elements or injection channels 12 without any problems.
- the electrical heating of the mold 4 is equally simple. Due to the activatable and deactivatable seal 13, the axial movement of the casting mold 4 is possible without any problems since the seal 13 is not activated during this movement.
- the supply path for the silicone from its source to the injection element (s) or injection channel (s) 12 can be cooled in order to prevent vulcanization there.
- One or more additional temperature element (s) 16 can be arranged above the casting mold 4.
- Such temperature element (s) can be infrared lamp (s) in particular.
- insulation shields 4 made of silicone plastics described, they can - as is generally known - consist of other, preferably weather-resistant synthetic resins. LIST OF REFERENCE NUMBERS
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Insulators (AREA)
- Processing Of Terminals (AREA)
- Treatments Of Macromolecular Shaped Articles (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
- Insulating Bodies (AREA)
Abstract
Description
Claims
Priority Applications (9)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP02737756A EP1377422B1 (de) | 2001-04-08 | 2002-03-27 | Verfahren und vorrichtung zur herstellung eines elektrischen kunststoffisolators |
AT02737756T ATE288818T1 (de) | 2001-04-08 | 2002-03-27 | Verfahren und vorrichtung zur herstellung eines elektrischen kunststoffisolators |
DE50202218T DE50202218D1 (de) | 2001-04-08 | 2002-03-27 | Verfahren und vorrichtung zur herstellung eines elektrischen kunststoffisolators |
KR10-2003-7013179A KR20030088493A (ko) | 2001-04-08 | 2002-03-27 | 플라스틱으로 된 전기 절연체를 제조하기 위한 방법 및 장치 |
CA002439975A CA2439975A1 (en) | 2001-04-08 | 2002-03-27 | Method and device for producing an electric insulator made from plastic |
JP2002579187A JP2004523397A (ja) | 2001-04-08 | 2002-03-27 | 電気的なプラスチック絶縁体を製作するための方法および装置 |
UA2003109085A UA74061C2 (en) | 2001-04-08 | 2002-03-27 | Method and device for producing a plastic electric insulator |
US10/474,314 US7214338B2 (en) | 2001-04-08 | 2002-03-27 | Method and device for producing an electric insulator made from plastic |
HK04105904A HK1063164A1 (en) | 2001-04-08 | 2004-08-09 | Method and device for producing an electric insulator made from plastic |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10117551 | 2001-04-08 | ||
DE10117551.5 | 2001-04-08 | ||
DE2001121236 DE10121236A1 (de) | 2001-04-30 | 2001-04-30 | Verfahren und Vorrichtung zur Herstellung eines elektrischen Kunststoffisolators |
DE10121236.4 | 2001-04-30 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2002081167A2 true WO2002081167A2 (de) | 2002-10-17 |
WO2002081167A3 WO2002081167A3 (de) | 2003-01-03 |
Family
ID=26009039
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE2002/001127 WO2002081167A2 (de) | 2001-04-08 | 2002-03-27 | Verfahren und vorrichtung zur herstellung eines elektrischen kunststoffisolators |
Country Status (11)
Country | Link |
---|---|
US (1) | US7214338B2 (de) |
EP (1) | EP1377422B1 (de) |
JP (1) | JP2004523397A (de) |
KR (1) | KR20030088493A (de) |
CN (1) | CN1308128C (de) |
AT (1) | ATE288818T1 (de) |
CA (1) | CA2439975A1 (de) |
DE (1) | DE50202218D1 (de) |
ES (1) | ES2236523T3 (de) |
HK (1) | HK1063164A1 (de) |
WO (1) | WO2002081167A2 (de) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN100341077C (zh) * | 2004-07-09 | 2007-10-03 | 上海Mwb互感器有限公司 | 复合绝缘子的制造方法及其模具 |
TW201006652A (en) * | 2008-08-01 | 2010-02-16 | Pegatron Corp | Injection molding machine and heat insulation structure of barrel thereof |
WO2013122207A1 (ja) * | 2012-02-15 | 2013-08-22 | 東レ株式会社 | 繊維強化樹脂の製造方法 |
CN105690656B (zh) * | 2016-04-11 | 2018-01-30 | 佛山伊之密精密橡胶机械有限公司 | 套管夹执装置 |
CN105690652B (zh) * | 2016-04-11 | 2017-12-19 | 佛山伊之密精密橡胶机械有限公司 | 空心复合绝缘子的自动化分段成型设备 |
CN109531896B (zh) * | 2019-01-03 | 2020-12-01 | 北京玻钢院复合材料有限公司 | 一种聚氨酯弹性体的浇注模具及其制备方法 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2425076A1 (de) * | 1974-05-24 | 1975-11-27 | Rhein Westfael Isolatoren | Verfahren zur herstellung von kunststoffisolatoren |
DE2657051A1 (de) * | 1976-12-16 | 1978-06-29 | Muanyagipari Kutato Intezet | Kunststoffisolator, verfahren zur herstellung des isolators und vorrichtung zur durchfuehrung des verfahrens |
WO1999008290A1 (de) * | 1997-08-08 | 1999-02-18 | Trench Germany Gmbh | Verfahren und form zur herstellung von schirmisolatoren |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH497030A (de) * | 1967-11-03 | 1970-09-30 | Siemens Ag | Verfahren zur Herstellung eines mit Glasfasern verstärkten Isolators aus Giessharz |
DE2044179C3 (de) | 1970-09-05 | 1975-01-09 | Rosenthal Technik Ag, 8672 Selb | Verfahren zur Herstellung von Kunststoff-Verbundisolatoren und Vorrichtung zur Durchführung dieses Verfahrens |
SU843716A3 (ru) | 1970-10-28 | 1981-06-30 | Циба-Гейги Аг (Фирма) | Способ изготовлени изделий изТЕРМОРЕАКТОплАСТОВ |
GB1549049A (en) | 1976-12-09 | 1979-08-01 | Villamos Ipari Kutato Intezet | Shedded insulators for electrical power lines and a process and apparatus for the production thereof |
CN1149528A (zh) * | 1995-11-03 | 1997-05-14 | 松星实业有限公司 | 电脑的辅助产品表层处理方法 |
DE19650579A1 (de) * | 1996-12-06 | 1998-06-10 | Asea Brown Boveri | Überspannungsableiter |
-
2002
- 2002-03-27 DE DE50202218T patent/DE50202218D1/de not_active Expired - Fee Related
- 2002-03-27 ES ES02737756T patent/ES2236523T3/es not_active Expired - Lifetime
- 2002-03-27 JP JP2002579187A patent/JP2004523397A/ja active Pending
- 2002-03-27 CA CA002439975A patent/CA2439975A1/en not_active Abandoned
- 2002-03-27 EP EP02737756A patent/EP1377422B1/de not_active Expired - Lifetime
- 2002-03-27 AT AT02737756T patent/ATE288818T1/de not_active IP Right Cessation
- 2002-03-27 WO PCT/DE2002/001127 patent/WO2002081167A2/de active IP Right Grant
- 2002-03-27 KR KR10-2003-7013179A patent/KR20030088493A/ko not_active Application Discontinuation
- 2002-03-27 CN CNB028045793A patent/CN1308128C/zh not_active Expired - Fee Related
- 2002-03-27 US US10/474,314 patent/US7214338B2/en not_active Expired - Fee Related
-
2004
- 2004-08-09 HK HK04105904A patent/HK1063164A1/xx not_active IP Right Cessation
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2425076A1 (de) * | 1974-05-24 | 1975-11-27 | Rhein Westfael Isolatoren | Verfahren zur herstellung von kunststoffisolatoren |
DE2657051A1 (de) * | 1976-12-16 | 1978-06-29 | Muanyagipari Kutato Intezet | Kunststoffisolator, verfahren zur herstellung des isolators und vorrichtung zur durchfuehrung des verfahrens |
WO1999008290A1 (de) * | 1997-08-08 | 1999-02-18 | Trench Germany Gmbh | Verfahren und form zur herstellung von schirmisolatoren |
Also Published As
Publication number | Publication date |
---|---|
ATE288818T1 (de) | 2005-02-15 |
DE50202218D1 (de) | 2005-03-17 |
HK1063164A1 (en) | 2004-12-17 |
ES2236523T3 (es) | 2005-07-16 |
CN1308128C (zh) | 2007-04-04 |
KR20030088493A (ko) | 2003-11-19 |
CN1491153A (zh) | 2004-04-21 |
CA2439975A1 (en) | 2002-10-17 |
US7214338B2 (en) | 2007-05-08 |
EP1377422A2 (de) | 2004-01-07 |
WO2002081167A3 (de) | 2003-01-03 |
US20040159980A1 (en) | 2004-08-19 |
EP1377422B1 (de) | 2005-02-09 |
JP2004523397A (ja) | 2004-08-05 |
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